JP2019088110A - POWER SUPPLY CONTROL DEVICE AND POWER SUPPLY SYSTEM - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply control device capable of protecting a storage battery from excessive generated power, and a power supply system including the power supply control device. SOLUTION: A generator that generates power by an engine, a storage battery to which the generated power of the generator is supplied, a load to which power is supplied from the generator and the storage battery, and electricity for connecting the generator, the storage battery, and the load to each other. It is applied to a power supply system provided in the path and equipped with a switch for switching the electrical connection state of the generator, the storage battery and the load with each other, and connects the generator and the storage battery under the power generation state in which the generator is generating power. An abnormality determination unit that determines whether the power supply path, which is the electric path, is in an abnormal state that is an abnormal path in which generated power of a predetermined value or more is supplied, and when it is determined that the power supply path is in an abnormal state. It is provided with a load control unit that controls the operating state of the load so as to increase the power consumption of the load. [Selection diagram] Fig. 1

Description

  The present invention relates to a power supply control device mounted on a vehicle, and a power supply system including the power supply control device.

  As a power supply system mounted on a vehicle, a generator that generates electricity by the power of an engine, a storage battery that is charged by the generated power of the generator, a load to which power is supplied from the generator and the storage battery, and electricity that connects these There is known one provided with a switch provided on a path, which switches an electrical connection state of a generator, a storage battery, and a load (see Patent Document 1).

JP 2011-234479 A

  In this type of power supply system, if an abnormality occurs in the generator or an abnormality occurs in a switch that switches the electrical connection between the generator and the storage battery, the generated power is excessively supplied to the storage battery. It becomes a state and there is a possibility that the storage battery may cause any trouble.

  Therefore, stop processing is performed to stop the power generation of the generator or to turn off the switch on the electrical path connecting the generator and the storage battery in the abnormal state where the generated power is excessively supplied to the storage battery. It is conceivable to do However, when there is an abnormality in the generator or switch in the first place, there is a possibility that such stop processing can not be performed correctly. In addition, even if the shutdown process can be executed correctly, there is a possibility that excessive generated power may be supplied to the storage battery before the shutdown process is executed after the abnormal state. Furthermore, even if the stop processing is correctly executed, there is a possibility that the stop processing can not be correctly executed thereafter due to the abnormality of the generator or the switch.

  The present invention has been made in view of the above, and has as its main object to provide a power supply control device and a power supply system capable of protecting a storage battery from excessive generated power.

  In the first means, a generator (10) that generates electric power by the power of the engine, a storage battery (11, 12) to which power generated by the generator is supplied, and a load to which power is supplied from the generator and the storage battery (20, 30) provided on an electrical path (L1 to L6) connecting the generator, the storage battery, and the load to each other, and switching the electrical connection state of the generator, the storage battery, and the load with each other The present invention is applied to a power supply system including switches (41 to 46), and an electric power supply path which is the electric path connecting the generator and the storage battery under a power generation state generated by the generator is a predetermined power or more. An abnormality determination unit (103) that determines whether or not there is an abnormal state that is an abnormal route to which the generated power is supplied; and when it is determined that the abnormal state is present, the power consumption at the load is increased And it includes a load control unit that controls the operating state of the load (104), a such that.

  A generator, a storage battery to which power generated by the generator is supplied, a load to which power is supplied from the generator and the storage battery, and an electric path connecting these to each other are provided. And a switch for switching the electrical connection of the load with one another, in the power supply system, when an abnormality occurs in the generator or an abnormality occurs in the switch switching the electrical connection between the generator and the storage battery, power generation occurs. The generated power is excessively supplied from the machine to the storage battery, which may cause some problems in the storage battery.

  Therefore, under the power generation state where the generator is generating, it is determined whether the power supply path, which is an electric path connecting the generator and the storage battery, is in an abnormal state where the generated power is more than a predetermined amount. Do. When it is determined that the load is in an abnormal state, the operating state of the load is controlled to increase the amount of power consumed by the load.

  By performing this process, the amount of power supplied to the load among the generated power of the abnormal path is increased, and the amount of power supplied to the storage battery is decreased. Therefore, the storage battery can be protected from excessive generated power.

  In the case where the generated power is excessively supplied from the generator to the storage battery, the generation of the generator may be stopped, or on the electrical path (on the power supply path) connecting the generator and the storage battery. It is conceivable to perform stop processing to turn off the switch. However, if there is an abnormality in the generator or switch in the first place, there is a possibility that such stop processing can not be performed correctly. Further, even if the stop processing can be executed correctly, there is a possibility that excessive generated power may be supplied to the storage battery after the occurrence of the abnormal state until the stop processing is executed. Furthermore, even if the stop processing can be executed correctly, there is a possibility that the stop processing can not be executed correctly thereafter due to the abnormality of the generator or the switch.

  Also in this case, if the operating condition of the load is controlled to increase the power consumption at the load as well as the stop processing, even after the occurrence of the abnormal state until the stop processing is executed, The storage battery can be protected from excessive power generation. Also, even if the stop processing is not executed correctly, the supply of generated power to the storage battery is reduced along with the increase in the amount of power consumption of the load. The storage battery can be protected.

  In the second means, the load includes a first load (20) which is a control device for performing control in the power supply system and a system associated with the power supply system, and a second load (30) other than the control device. And the load control unit is configured to increase power consumption of the second load among the first load and the second load when it is determined that the abnormal state is the abnormal state. Control the operating condition.

  As a load, the power consumption is increased for the second load of the power supply system and a first load that is a control device that performs control in the system associated with the power supply system and a second load other than the control device Therefore, it is possible to protect the storage battery from excessive power supply while avoiding the influence on the operation of the power supply system.

  In the third means, the load includes a traveling system load (21) for changing a traveling state of a vehicle on which the engine is mounted, and a non-traveling system load (22) other than the traveling system load (21). Controls the operating state of the non-traveling system load so as to increase the power consumption of the non-traveling system load among the traveling system load and the non-traveling system load when it is determined that the abnormal state is present Do.

  Of the traveling system load for changing the traveling state of the vehicle equipped with the engine and the other non-traveling system load, the amount of power consumption is increased for the non-traveling system load. Among the generated power supplied to the power supply path, the generated power to be supplied to the load can be increased while avoiding the influence. Therefore, the storage battery can be protected from excessive power supply while avoiding the influence on the traveling of the vehicle.

  In the fourth means, the load control unit controls the operating state of the load such that the amount of increase in the amount of power consumption by the load is adjusted according to the generated power of the abnormal path.

  Increasing the power consumption of the load to protect the storage battery from excessive generated power leads to an increase in fuel consumption in the engine. Therefore, the amount of increase in power consumption due to the load is adjusted according to the power generated in the abnormal path. As described above, the storage battery can be protected from excessive power supply while suppressing the increase in the amount of power consumption of the load to a necessary amount.

  In the fifth means, the abnormality determination unit includes a specification unit (103a) that specifies which one of the generator and the switch is the abnormal part, and the load control unit is configured to detect the abnormal part as the generator. In this case, the operating condition of the load is controlled such that the amount of increase in the amount of power consumption of the load at the time of occurrence of an abnormality is larger than when the abnormal point is the switch.

  When an abnormality occurs in the generator, there is a high possibility that the generated power supplied to the electrical path may rapidly increase when the abnormality occurs, as compared with the case where the abnormality occurs in the switch. Therefore, it is specified whether the abnormal part is a generator or a switch, and if the abnormal part is a generator, compared with the case where the abnormal part is a switch, the power consumption of the load when the abnormality occurs The operating condition of the load was controlled to increase the amount of increase. Such a process can more appropriately protect the storage battery from excessive generated power according to the abnormal point.

  In the sixth means, the storage state of the storage battery is controlled so that the storage amount of the storage battery falls within a range of a predetermined lower limit voltage and a predetermined upper limit voltage, and the storage amount of the storage battery is And a chargeable amount calculation unit for obtaining the chargeable amount of the storage battery from a difference between the charge recognition unit (102a) to be recognized, the storage amount recognized by the charge recognition unit, and the storage amount at the upper limit voltage 102c), and the load control unit controls the operating state of the load such that the amount of increase in power consumption by the load is adjusted while subtracting the chargeable amount of the storage battery.

  When the storage battery can be charged, the amount of increase in power consumption of the load is adjusted after securing the amount of power necessary for the charging. Such processing can protect the storage battery from excessive generated power while effectively using the generated power.

  In the seventh means, the load control unit increases the power consumption of the load when the chargeable amount of the storage battery connected to the abnormal path is larger than the generated power of the abnormal path. Do not process.

  Even if it is determined that the abnormal state is the abnormal state by the abnormality determination unit, if the chargeable amount of the storage battery connected to the abnormal path is larger than the generated power of the abnormal path, the process of increasing the power consumption of the load is not performed. Thus, the storage battery can be protected from excessive generated power while suppressing unnecessary increase in fuel consumption for protection of the storage battery.

  The eighth means includes a temperature recognition unit (102b) for recognizing the battery temperature of the storage battery, and the load control unit uses the amount of power consumed by the load as the battery temperature recognized by the temperature recognition unit becomes higher. The operating condition of the load is controlled to increase the increase amount of

  As the battery temperature of the storage battery becomes higher, the effects such as acceleration of deterioration of the storage battery become greater. Therefore, after the abnormal state is determined and the abnormal point is identified, the operating condition of the load is controlled so that the amount of increase in the consumed energy of the load increases as the battery temperature of the storage battery increases. did. As described above, the effect of protecting the storage battery can be enhanced as compared to the case where the battery temperature of the storage battery is not considered.

  In the ninth means, the electric path is provided with a plurality of types of loads having different maximum values of power consumption, and the load control unit is determined by the abnormality determination unit to be in the abnormal state. In this case, the load for which the power consumption is increased is selected according to the generated power of the abnormal path.

  Since the load for increasing the power consumption is selected according to the power generation of the abnormal path, it is possible to suppress the occurrence of excess or deficiency in the increase in the power consumption of the load.

  In the tenth means, the load includes a recognition load (25) by which the occupant can recognize the driving state of the load, and a non-recognition load (26) other than the recognition load, and the load control unit When it is determined that the load is in an abnormal state, the operating state of the load is controlled to preferentially increase the amount of power consumption of the unrecognized load among the recognized load and the unrecognized load.

  When there is a recognition load with which the occupant can recognize the driving state of the load and a non-recognition load other than that as the load, the power consumption is preferentially increased for the non-recognition load among them. The power consumption of the load can be increased while considering the influence on the occupants.

  In an eleventh means, the load includes a thermal load (23) that is heated and operated by energization and a non-thermal load (24) other than that, and the load control unit is determined to be in the abnormal state. In this case, the operating condition of the load is controlled to preferentially increase the power consumption of the heat load among the heat load and the non-heat load.

  In the case where there is a thermal load that heats and operates by energization and another non-thermal load as the load, the thermal load tends to have a larger maximum value of power consumption as compared to the other non-thermal loads. Therefore, since the power consumption of the thermal load among the thermal load and the non-thermal load is preferentially increased, the power consumption of the load can be more efficiently increased.

  In a twelfth means, as the switch, a first switch (42 etc.) provided on the power supply path which is the electric path connecting the generator and the storage battery, the power supply path and the load And a second switch (43 or the like) provided on the electrical path to be connected, the switch control unit (101) for switching between on and off of the switch, the switch control unit including the abnormality When it is determined that the state is, the switch control is performed to turn off the first switch and turn on the second switch, and the load control unit performs the load control while the switch control is performed. Control the operating condition of the load so as to increase the amount of power consumption.

  If it is determined that an abnormal state is present, the first switch of the power supply path (abnormal path) connecting the generator and the storage battery is turned off, and the second switch on the electrical path connecting the abnormal path and the load is turned on. Do. Furthermore, since the operating state of the load is controlled to increase the amount of power consumption at the load, the configuration for protecting the storage battery from excessive generated power can be duplicated.

  That is, when the switch control is performed in the abnormal state, if the first switch on the abnormal path is normal, the first switch is switched off to supply the generated power supply path to the storage battery. It can be shut off. Further, even if the state of the first switch is not properly switched by the switch control due to the abnormality of the first switch, the amount of supplied power to the storage battery decreases with the increase of the amount of generated power supplied to the load. Therefore, the storage battery is protected from excessive generated power.

  The thirteenth means is applied to a power supply system including, as the storage battery, a first storage battery (Pb) and a second storage battery (Li) connected in parallel to the generator, as a switch provided in the electric path. A first switch (41 or the like) provided in a first power supply path connecting the generator and the first storage battery, and a second switch provided in a second power supply path connecting the generator and the second storage battery A switch (42 or the like), and the abnormality determination unit determines the abnormality in any one of the first power supply path and the second power supply path under a power generation state in which the generator is generating power. If the load control unit determines that any one of the first power supply path and the second power supply path is in an abnormal state, consumption by the load is determined. Controlling the operating state of the load so as to increase the force.

  In a power supply system provided with two power sources such as a first storage battery and a second storage battery connected in parallel to a generator as storage batteries, the abnormality determination unit includes an electrical path (first electric power connecting the generator and the first storage battery) It is determined whether or not there is an abnormal state in each of an electric path (second power supply path) connecting the power supply path, the generator and the second storage battery. Then, the load control unit controls the operating state of the load so as to increase the amount of power consumed by the load when it is determined that the power supply path is in an abnormal state in any of the power supply paths. As described above, in the configuration in which a plurality of storage batteries are connected in parallel to the generator, each storage battery can be individually protected from excessive generated power.

  In the fourteenth means, the state of charge of each storage battery is controlled such that the storage amount of each storage battery falls within a range between a predetermined lower limit voltage and an upper limit voltage, and the storage amount of each storage battery is And a chargeable amount calculation unit for obtaining the chargeable amount of each storage battery from a difference between the charge recognition unit (102a) to be recognized, the storage amount recognized by the recognition unit, and the storage amount at the upper limit voltage 102c), and the load control unit is determined by the abnormality determination unit to be in the abnormal state, and a third storage battery in which each storage battery is connected to the abnormal path, and other than the abnormal path When the fourth storage battery can be charged, consumption of the load is taken while deducting the chargeable amount of the fourth storage battery. Increase the amount of power It controls the operating state of the sea urchin the load.

  In a configuration in which a plurality of storage batteries are connected in parallel to a generator, the power supply path connecting one storage battery and the generator is in an abnormal state, but the power supply path connecting the other storage battery and the generator If the generated power is supplied to the storage battery connected to the power supply path not in the abnormal state, the supply amount of the generated power to the storage battery connected to the abnormal path can be reduced. Also, in this case, the generated power can be used to charge the storage battery. As described above, the storage battery can be protected from excessive generated power while effectively utilizing the generated power of the power supply path determined to be in the abnormal state.

  In a fifteenth means, the power supply system supplies power from the power supply control device according to any one of the first to fourteenth means, the generator, the storage battery to which the generated power is supplied, the generator, and the storage battery. Switch which is provided in the electrical path, and switches between the electrical connection state of the generator, the storage battery and the load, and the electrical path connecting the load, the generator, the storage battery, and the load to each other And have.

  In the sixteenth means, the power supply control device inputs an operation command from the host control device (200) and performs energization to the load based on the operation command, and the load control unit is abnormal. When it is determined that the load is in the state, a command signal for increasing the power consumption of the load is output to the load regardless of the operation command from the host controller.

  In the case where the power supply control device inputs an operation command from the host control device and causes the load to be energized based on the operation command, the load control unit is determined to be in an abnormal state. Since the command signal for increasing the power consumption of the load is output regardless of the operation command from the host controller, the power consumption of the load can be increased more quickly.

The schematic block diagram of a power supply system. Explanatory drawing regarding classification of load. The figure which shows the function with which a control part is provided. The flowchart of abnormality determination processing. Flow chart of fail control. The flowchart of a load selection process. The figure which shows the example of execution of abnormality determination processing. The schematic block diagram of the example of a change of a power supply system.

  Hereinafter, an embodiment of the present invention will be described based on the drawings. The following embodiments disclose a power supply system mounted on a vehicle traveling with at least one of engine power and vehicle kinetic energy as a drive source.

  As shown in FIG. 1, the power supply system includes a generator 10, a lead storage battery 11 which is a first storage battery, a lithium ion storage battery 12 which is a second storage battery, a starter 13, a load 20 (first load) and a load 30 (second Load), switches 41 to 44, and a control unit 100.

  The lead storage battery 11 and the lithium ion storage battery 12 are electrically connected in parallel to the generator 10. Therefore, the power (generated power W) generated by the power generation of the generator 10 can be supplied to both the storage batteries 11 and 12. Moreover, the generator 10 can also be driven by power feeding from both the storage batteries 11 and 12.

  The lead storage battery 11 is a known general purpose storage battery. On the other hand, the lithium ion storage battery 12 is a high density storage battery with less power loss during charge and discharge and higher power density and energy density than the lead storage battery 11. That is, the lead storage battery 11 has a characteristic that the voltage variation with respect to the variation of the state of charge (SOC) is small. The term "SOC" refers to the ratio of the actual charge amount to the full charge amount. In contrast, lithium ion storage battery 12 has a characteristic that the voltage fluctuation range with respect to the SOC fluctuation is large and the internal resistance is small. Moreover, compared with the lead storage battery 11, the lithium ion storage battery 12 is excellent in cycle characteristics, and has a relatively moderate deterioration due to charge and discharge. Both storage batteries 11 and 12 are provided with a voltage sensor, a current sensor and a temperature sensor which are not shown.

  In FIG. 1, the lithium ion storage battery 12, the switches 41 to 44, and the control unit 100 in the configuration described above are integrated by being housed in a case (accommodating case) to configure a battery unit U. Among these, the switches 41 to 44 and the control unit 100 are mounted on the same substrate (not shown).

  The battery unit U is provided with a first terminal P1, a second terminal P2 and a third terminal P3 as external terminals. Among these, the lead storage battery 11, the starter 13, and the load 20 are connected to the first terminal P1. The generator 10 is connected to the second terminal P2. The load 30 is connected to the third terminal P3.

  In the battery unit U, a plurality of electric paths L1 to L4 which mutually connect the terminals P1 to P3 and the lithium ion storage battery 12 are provided as electric paths in the unit. And switches 41-44 are provided on each electric path L1-L4.

  Describing in detail, the electric path L1 is a path connecting the first terminal P1 and the second terminal P2, and the switch 41 is provided on the path. A connection point N1 is formed between the switch 41 and the first terminal P1, and a connection point N2 is formed between the switch 41 and the second terminal P2. The electrical path L2 is a path connecting the connection point N2 of the electrical path L1 and the lithium ion storage battery 12, and the switch 42 is provided on the path. A connection point N3 is formed between the switch 42 and the lithium ion storage battery 12. The electrical path L3 is a path connecting the connection point N3 of the electrical path L2 and the third terminal P3, and the switch 43 is provided on the path. A connection point N4 is formed between the switch 43 and the third terminal P3. The electric path L4 is a path connecting the connection point N1 of the electric path L1 and the connection point N4 of the electric path L3, and the switch 44 is provided on the path.

  Therefore, the generator 10, the lead storage battery 11, the starter 13, and the load 20 are electrically connected to each other through the electric path L1. Alternatively, the generator 10, the lead storage battery 11, the starter 13, and the load 20 can be electrically connected to each other through the electrical paths L2 to L4.

  Further, the generator 10 and the lithium ion storage battery 12 are electrically connected to each other through the electrical path L2. Alternatively, the generator 10 and the lithium ion storage battery 12 can be electrically connected to each other via the electrical paths L1, L4, and L3.

  In the battery unit U, current sensors I1 to I4 for detecting the current flowing through the electric paths L1 to L4 are individually provided on the electric paths L1 to L4. Among these, the current between the generator 10 and the lead storage battery 11 can be detected by, for example, the current sensor I1 provided in the electric path L1. Further, the current between the generator 10 and the lithium ion storage battery 12 can be detected by the current sensor I2 provided in the electric path L2. In addition, when a current sensor is separately provided in each switch 41-44, the current of each electrical path L1-L4 can be detected using the current sensor.

  The switches 41 to 44 are each configured using 2 × n semiconductor switches (MOSFETs). Specifically, first, two semiconductor switches are connected in series to form a series connected body. At this time, the parasitic diodes are connected in the opposite direction. With such a configuration, when the switches 41 to 44 are turned off, it is possible to interrupt also the electric path flowing through the parasitic diode of the MOSFET. And each switch 41-44 is comprised by connecting two series connection bodies in parallel. By thus connecting the semiconductor switches in parallel to configure the switches 41 to 44, it is possible to increase the amount of allowable current that can be supplied to the electric paths L1 to L4.

  The control unit 100 switches between on (conductive state, closed state) and off (non-conductive state, open state) of the switches 41 to 44. Details of processing performed by the control unit 100 will be described later. The switches 41 to 44 may be configured using at least one semiconductor switch, and the switches 41 to 44 can also be configured by mechanical switches.

  The load 20 is a general load other than the starter 13. On the other hand, the load 30 is a constant voltage demand load that requires that the voltage of the supplied power be substantially constant or that the voltage fluctuation is within a predetermined range and stable. Therefore, it can be said that the load 20 is a non-protection load in which the fluctuation of the input voltage is allowed to some extent compared to the load 30.

  The load 20 is connected to the side opposite to the generator 10 via the switch 41 in the electrical path L1. The load 20 can also be said to be provided on the side opposite to the generator 10 through the switches 42 to 44 in the electric paths L2 to L4.

  The load 30 is provided on the side of the electrical paths L2 and L3 opposite to the generator 10 via the switches 42 and 43. The load 30 can also be said to be provided on the side opposite to the generator 10 via the switches 41 and 44 in the electrical paths L1 and L4.

  Power can be supplied from both storage batteries 11 and 12 to these loads 20 and 30. That is, the load 20 connected to the lead storage battery 11 is not only fed from the lead storage battery 11, but also electrically connected to the lithium ion storage battery 12 via the electric paths L3 and L4, Can be fed. However, in the present embodiment, the power supply to the load 20 is mainly shared by the lead storage battery 11.

  On the other hand, the load 30 is electrically connected to the lithium ion storage battery 12 through the electric path L3 so that power is supplied from the lithium ion storage battery 12. Further, power is supplied from the lead storage battery 11 by being electrically connected to the lead storage battery 11 via the electric path L4. However, in the present embodiment, the lithium ion storage battery 12 mainly shares power supply to the load 30 which is a constant voltage required load.

  The loads 20 and 30 are communicably connected to the control unit 100. The control unit 100 is communicably connected to the ECU 200 (upper-level controller) outside the battery unit U, receives a command signal (operation command) from the ECU 200, and receives each of the loads 20 and 30 based on the operation command. Energize or adjust the output level. The output level of the load can be switched stepwise or changed linearly for each type of load.

  In FIG. 1, each of the loads 20 and 30 may be configured of at least one load, and each of the loads 20 and 30 may be configured of a plurality of different types of loads.

  The load 20 includes, for example, headlights, stop lamps, fog lamps, blinkers, wipers such as front windshields, blower fans for air conditioners, lighting devices for cabins, seat heating devices (seat heaters), engine cooling devices (Radiator), defogger, etc. For the defogger, use the dehumidification and hot air functions of the air conditioner to remove condensation (mainly for the front window and side windows), and use the heating wire to remove condensation (mainly the rear window and side mirror There is).

  In addition to this, the load 20 may include a drive load that shifts from the stop state to the drive state when a predetermined drive condition is satisfied, and returns to the stop state when the condition is not satisfied. The driving load is a power steering, a power window or the like. In addition to this, the load 20 includes loads other than the power supply system and various control devices that perform control in the system associated with the power supply system.

  On the other hand, examples of the load 30 include an on-vehicle navigation device, an on-vehicle audio device, and a meter device. In addition to this, the load 30 includes a power supply system and various control devices that perform control in a system associated with the power supply system.

  By the way, when the load 20 shown in FIG. 1 is composed of a plurality of loads of different types, those loads can be classified from various viewpoints. For example, as shown in FIG. 2 (a), a traveling system load 21 for changing the traveling state of the vehicle, and a non-traveling system load not related to changing the traveling state of the vehicle. It can be classified into 22. For example, a headlight, a stop lamp, a fog lamp, a blinker, a wiper, an engine cooling device (radiator), a drive device, etc. correspond to the traveling system load 21. The non-traveling system load 22 corresponds to a vehicle interior lighting device, a seat heating device, a defogger, an air conditioner, and the like.

  Further, as shown in FIG. 2B, the load 20 can also be classified into a thermal load 23 that performs heating operation by energization and a non-thermal load 24 other than that. That is, the heat load 23 is a load mainly used for the purpose of heat generation, and the non-heat load 24 can be said to be a load used for the purpose other than heat generation. For example, among the non-traveling system loads 22, the heat load 23 corresponds to an air conditioner for heating the vehicle interior, a seat heating device, or the like. The non-heat load 24 corresponds to a headlight, a lighting device of a vehicle compartment, a drive load, an air conditioner (radiator), a defogger, and the like.

  Further, as shown in FIG. 2C, the load 20 can also be classified into a recognition load 25 by which the occupant can recognize the driving state and a non-recognition load 26 other than the recognition load 25. For example, in the non-traveling system load 22, as the recognition load 25, a seat heating device, a lighting device of a passenger compartment, an air conditioner, etc. correspond. The non-recognition load 26 corresponds to a headlight, a defogger, a drive load, an engine cooling device (radiator), and the like.

  In the case where the load 30 is also composed of a plurality of loads of different types, as in the case of the load 20, each of the loads can be classified from various viewpoints.

  Returning to the explanation of FIG. 1, the generator 10 is connected to a crankshaft of an engine (not shown) via a belt or the like, and various sensors (voltage, current, temperature sensors, etc.) for detecting the operating state of the generator 10 ) Is provided. The generator 10 functions as a generator when the vehicle travels and decelerates. Specifically, when the vehicle travels, power is generated using the power of the engine. At the time of deceleration of the vehicle, power is generated using kinetic energy of the vehicle (energy generated by rotation of the driving wheel). The electric power generated by the generator 10 is A / D converted by a rectifier (not shown) and then supplied to the loads 20 and 30 and the storage batteries 11 and 12. The power generation by the generator 10 is controlled by a control unit (not shown) of the generator 10 based on a command signal from the ECU 200.

  Moreover, the generator 10 functions as an electric motor, when restarting from the stop state of the engine by idling stop control. That is, the generator 10 is rotated by the power supplied from each of the storage batteries 11 and 12 in a stopped state of the engine by the idling stop control, whereby the engine is restarted. As such a generator 10, it is possible to use an ISG (Integrated Starter Generator) integrated with the functions of a starter and an alternator, a motor generator, or the like, and a known rotating machine having a power generation function and an electric function.

  The control unit 100 provided in the battery unit U is configured using a microcomputer provided with a CPU, a ROM, a RAM, an I / O interface, etc., and receives signals from various sensors mounted in the power supply system. It has become. In the example of FIG. 1, signals from the current sensors I1 to I4 provided in the electric paths L1 to L4 and the voltages, currents, and temperature sensors provided on both the storage batteries 11 and 12 are input.

  The ECU 200 provided outside the battery unit U is configured using a microcomputer provided with a CPU, a ROM, a RAM, an I / O interface, etc., and the power supply system and signals from various sensors included in the system accompanying the power supply system are input It is supposed to be

  As described above, the control unit 100 and the ECU 200 are communicably connected to each other via a communication network such as CAN. Therefore, various data stored in control unit 100 and ECU 200 can be shared with each other. The control unit 100 mainly controls the power supply system. On the other hand, the ECU 200 controls various in-vehicle devices including a power supply system and a system attached to the power supply system.

  First, a specific example of various controls performed by the ECU 200 will be described. The ECU 200 controls power generation by the generator 10. Specifically, the ECU 200 generates a command signal for setting the output voltage of the generator 10 as a target voltage, using the detection result of the voltage between terminals by the voltage sensor of each of the storage batteries 11 and 12.

  By the way, charging of the storage battery by the generated power of the generator 10 and power supply to the load by the generated power are performed when the output voltage of the generator 10 is larger than the voltage between the terminals of the storage battery. Then, the power generated by the generator 10 at this time depends on the potential difference between the output voltage of the generator 10 and the voltage between the terminals of the storage battery. Therefore, the ECU 200 sets a target voltage based on the potential difference between the terminal voltage of the storage battery and the output voltage of the generator 10.

  On the other hand, on the generator 10 side, when a command signal from the ECU 200 is received, the control unit (not shown) of the generator 10 controls PWM (Pulse Width Modulation) of a semiconductor switching element (not shown) included in the generator 10. I do. Thereby, the supply amount of the generated power is controlled such that the output voltage of the generator 10 becomes the target voltage. The amount of power generated by the generator 10, that is, the amount of charge of the storage battery and the amount of power supplied to the load increase as the duty ratio of the PWM control increases and decreases as the duty ratio decreases.

  Further, the ECU 200 adjusts the output level (power consumption amount CP) of each load 20, 30, and outputs a command signal (operation command) for switching on / off of each load 20, 30. Furthermore, the ECU 200 automatically stops the engine when a predetermined automatic stop condition is satisfied while the ignition switch is on, or restarts the engine when a predetermined restart condition is satisfied under the automatic stop state. It outputs a command signal to start it.

  As shown in FIG. 3, the control unit 100 includes the functions of a switch control unit 101, a battery state recognition unit 102, an abnormality determination unit 103, and a load control unit 104. Note that each of these functions is realized by the CPU executing a program stored in the ROM.

  The switch control unit 101 controls on / off of each of the switches 41 to 44 based on the state of the storage battery recognized by the battery state recognition unit 102 and the determination result of the abnormal state by the abnormality determination unit 103.

  Specifically, the battery state recognition unit 102 includes a charge recognition unit 102 a, a temperature recognition unit 102 b, a chargeable amount calculation unit 102 c, and a dischargeable amount calculation unit 102 d. The charge recognition unit 102 a recognizes the SOC as the storage amount of each of the storage batteries 11 and 12. Specifically, the SOC is calculated and recognized on the basis of the voltage between the terminals of the storage battery recognized using the voltage sensor provided in each of the storage batteries 11 and 12 and the current integration value recognized using the current sensor. Since the method of calculating the SOC is well known, the detailed description is omitted. The temperature recognition unit 102b recognizes the battery temperature based on the detection result of the temperature sensor.

  Chargeable amount calculation unit 102c calculates the chargeable amount of the storage battery from the difference between the SOC recognized by charge recognition unit 102a and the SOC when the storage battery is at upper limit voltage VH. The dischargeable amount calculation unit 102d calculates the dischargeable amount of the storage battery from the difference between the SOC recognized by the charge recognition unit 102a and the SOC when the storage battery is at the lower limit voltage VL.

  Then, when charging the storage batteries, switch control unit 101 sets each storage battery 11, 11, based on the calculated chargeable amount, on condition that the battery temperature of each storage battery 11, 12 is equal to or lower than a predetermined upper limit temperature. The switch control is performed to switch on and off of the switches 41 to 44 so that the SOC 12 does not exceed the predetermined upper limit voltage VH. Similarly, when discharging the storage battery, a switch that switches on and off of each switch 41 to 44 so that the SOC of each storage battery 11, 12 does not fall below a predetermined lower limit voltage VL based on the calculated dischargeable amount. Control. As mentioned above, it adjusts so that SOC of each storage batteries 11 and 12 may become a range (SOC tolerance | permissible_range) which does not become overcharge / discharge.

  Specifically, when the switch control unit 101 supplies the generated power W of the generator 10 to the lead storage battery 11, the switch control unit 101 performs a switch (on the path) to electrically connect the generator 10 and the lead storage battery 11. For example, the switch 41) is turned on. On the other hand, when the supply of the generated power W to the lead storage battery 11 is cut off, the switch (for example, the switch 41) on the path is turned off in order to electrically disconnect the generator 10 and the lead storage battery 11. Do.

  Similarly, in the case where the lithium ion storage battery 12 is charged with the generated power W of the generator 10, a switch (for example, switch 42) on the electric path is provided to electrically connect the generator 10 and the lithium ion storage battery 12. Turn on. On the other hand, when the supply of the generated power W to the lithium ion storage battery 12 is cut off, a switch (for example, switch 42) on the electric path is made to electrically disconnect the generator 10 and the lithium ion storage battery 12. Turn off.

  In addition, when charging and discharging between both storage batteries 11 and 12, switch control unit 101 electrically connects the storage batteries 11 and 12 with each other, and switches (for example, switch 43 and switch 44) on the electric path. Turn on).

  Furthermore, when discharging each of the storage batteries 11 and 12, the switch control unit 101 basically controls on / off of each of the switches 41 to 44 so as to cut off the connection of the lead storage battery 11 and the lithium ion storage battery 12. In this case, since the current from the lead storage battery 11 to the lithium ion storage battery 12 and the current from the lithium ion storage battery 12 to the lead storage battery 11 are suppressed, it is possible to suppress the power loss accompanying the flow of the current between both storage batteries.

  By the way, in the power supply system, there may be an abnormal state in which the generated power is excessively supplied to the storage battery. For example, in the generator, when an abnormality such as switching operation of the semiconductor switching element is not correctly performed or power generation by the generator can not be correctly stopped, an abnormal state may occur. In addition, when a switch on the electrical path connecting the generator and each storage battery causes an on failure or the like, and the supply path of the generated power from the generator to the storage battery can not be shut off, an abnormal state may occur. Then, excessive supply of generated power exceeding the SOC allowable range for each storage battery leads to the progress of deterioration and damage in the storage battery.

  Therefore, when it becomes a condition where the generated power is excessively supplied from the generator to the storage battery, the switch of the electric path (power supply path) connecting the generator and the storage battery is stopped or the generator is stopped. It is conceivable to perform stop processing to turn off. However, if there is an abnormality in the generator or switch in the first place, there is a possibility that such stop processing can not be performed correctly. In addition, even if the stop processing can be performed correctly, there is a possibility that excessive generated power may be supplied to the storage battery after the occurrence of the abnormal state until the stop processing is performed. Furthermore, even if the stop processing can be executed correctly, there is a possibility that the stop processing can not be executed thereafter due to the abnormality of the generator or the switch.

  That is, if an abnormality occurs in the generator, but the switch on the electrical path connecting the generator and the storage battery is normal, if the switch is turned off by stop processing, power generation from the generator to the storage battery Power supply can be interrupted once. However, even if the switch is turned off, there is a risk that the switch may subsequently fail as the excess generated power (generated power over the withstand voltage) from the generator is continuously supplied to the switch. In addition, in order to avoid that a switch breaks down accompanying a malfunction of a generator, it is also possible to adopt a high withstand voltage switch, but the cost increase for constructing a power supply system and the system upsizing Invite you.

  Therefore, the abnormality determination unit 103 supplies a generated power W of a predetermined power or more to the power supply path PL, which is an electrical path connecting the generator 10 and the storage batteries 11 and 12 under the power generation state generated by the generator 10. It is determined whether or not there is an abnormal state that becomes an abnormal path to be For example, abnormality determination unit 103 determines an integrated value of current in power supply path PL (integrated value of current supplied to the storage battery) based on detection results of current sensors I1 to I4 provided in each of electric paths L1 to L4. . Then, when the integrated value of the current exceeds a predetermined control upper limit value, it is determined that the power supply path PL is in an abnormal state where the path is an abnormal path. The control upper limit value can be preset as the maximum value of the generated power W that can be supplied to each of the electric paths L1 to L4.

  When the abnormality determination unit 103 determines that the switch control unit 101 is in the abnormal state, the switch control unit 101 turns off the switch of the abnormal path, and connects the abnormal path to the load 20 (an abnormal state). Switch on electrical paths not determined to be

  For example, when it is determined that the electrical path L2 (power supply path PL) connecting the generator 10 and the lithium ion storage battery 12 is an abnormal path, the electrical path L2 (connection point N3) and the load 20 are The switches 43 and 44 of the electrical paths L3 and L4 to be connected are turned on. As described above, the generated power W of the electric path L2 is supplied to the load 20.

  On the other hand, when the load control unit 104 is determined to be in the abnormal state by the abnormality determination unit 103, the load operating condition is such that the power consumption CP of the load 20 is increased regardless of the operation command from the ECU 200. Control fail control. For example, in the fail control, if the load 20 is in the stop state before it is determined to be in the abnormal state, a command signal for starting the operation (energization) of the load 20 is output. Also, if the load 20 is operated (energized) before it is determined to be in an abnormal state, a command signal for increasing the output level is output.

  The amount of power consumption CP of the load 20 is increased by the execution of such failure control, so that the amount of power generation W supplied to the power supply path PL connecting the generator 10 and the storage battery to the storage battery. Can be reduced.

  When the switch control unit 101 performs switch control of turning off the switch of the abnormal path and turning on the switch of the electrical path connecting the load 20 and the abnormal path, the existing system is used to switch on the storage battery. Multiplexing of protection will be achieved. That is, if the switch of the abnormal path is normal, the switch is properly switched off, and thereby the supply path of the excess generated power W to the storage battery is cut off. On the other hand, even if the switch in the abnormal path is broken or the switch in the abnormal path is initially normal but the supply of excess generated power is continued, even if the failure is subsequently reached, Since the amount of power consumption of the load 20 is increased through the electrical path connecting to the abnormal path, it is possible to prevent the storage battery from being supplied with excessive generated power.

  By the way, when it is determined that the abnormal state is caused by the ON failure of the switch, as described above, even if the process of turning off the switch on the abnormal path is performed as the stop process, this process is correct. It will not be done. Under such circumstances, assuming that a command signal for fail control is output to the load 20 via the ECU 200, the generator 10 sends a signal to the storage battery until the stop processing is executed. Excessive generated power may be supplied.

  On the other hand, when the control unit 100 (load control unit 104) directly outputs a command signal for fail control to the load 20, the command signal for fail control is indirectly transmitted via the ECU 200. The power consumption CP of the load 20 can be increased more quickly compared to the case of Therefore, the storage battery can be protected from excessive generated power even between the occurrence of an abnormality and the execution of the stop processing.

  In the present embodiment, among the load 20 (general load) and the load 30 (constant voltage required load) as the fail control, the power consumption CP of the load 20 is increased to avoid the influence on the load 30. The power consumption CP is increased.

  By the way, it is conceivable that the manner of increase of the generated power W of the electrical path at the time of occurrence of abnormality differs depending on the abnormal point. That is, when the abnormal point is a switch, there is a possibility that the generated power can be adjusted on the generator 10 side. On the other hand, when the abnormal point is the generator 10, there is a high possibility that the adjustment of the generated power itself becomes difficult. Therefore, when the abnormal portion is the generator 10, the generated power at the time of occurrence of the abnormality may be increased instantaneously as compared with the case where the abnormal portion is the switch. In addition, performing failure control when generating power using the power of the engine leads to an increase in the amount of fuel consumption for driving the engine.

  Therefore, as shown in FIG. 3, the abnormality determination unit 103 of the present embodiment includes a specification unit 103 a that specifies whether the abnormality portion is the generator 10 or the switch. For example, when the control unit 100 outputs a command signal to each of the switches 41 to 44, the specifying unit 103a detects an abnormal part based on the detection result as to whether or not the command signal is appropriately processed. Identify. Specifically, when the switch control unit 101 performs switch control to switch on and off of each of the switches 41 to 44, the specifying unit 103a measures the magnitude of the current flowing through each switch as a result of execution of the switch control. Identify the abnormal point based on whether or not it is consistent. That is, if the magnitude of the current flowing through the switch is matched as the execution result of the switch control, the switch is normal, and thus the abnormal point can be identified as the generator 10. On the other hand, if the matching of the current flowing through the switch is not achieved as a result of execution of the switch control, the abnormal point can be identified as the switch.

  As another example, when ECU 200 outputs a command signal to generator 10, specifying unit 103a receives, from ECU 200, a result as to whether or not appropriate processing has been performed on the command signal. , Can identify the abnormal point. That is, when a command signal to increase or decrease the generated power of generator 10 is output, specifying unit 103a determines that generator 10 is normal if the generated power of generator 10 is correctly adjusted in accordance with the command signal. Since there is an abnormality, the abnormal point can be identified as a switch. On the other hand, if the generated power of the generator 10 is not properly adjusted according to the command signal, it is possible to specify that the abnormal point is the generator 10. Note that various detection values for specifying an abnormal part can be obtained from detection results of the generator 10, the switches 41 to 44, and various sensors provided in the electric paths L1 to L4.

  Then, when an abnormality occurs, the load control unit 104 individually initializes the increase amount of the power consumption amount CP of the load in accordance with the abnormal portion specified by the specifying unit 103a. For example, when the abnormal point is the generator 10, the power consumption amount CP of the load 20 is initially set to be the maximum value (MAX). On the other hand, when the abnormal point is a switch, the power consumption amount CP of the load is initialized to be increased by a predetermined amount ΔCP. That is, when the abnormal point is a switch, compared with the case where the abnormal point is the generator 10, the amount of increase in the power consumption CP of the load 20 at the time of occurrence of the abnormality can be suppressed. As described above, by individually setting the method of increasing the power consumption amount CP of the load 20 according to the abnormal point, the storage battery is protected according to the abnormal point while the fuel consumption amount accompanying the fail control is increased. It can be minimized.

  Further, the load control unit 104 adjusts the increase amount of the power consumption amount CP according to the surplus (surplus power ΔW) of the generated power W supplied to the storage battery during the execution of the fail control. That is, the load control unit 104 calculates the surplus power ΔW by subtracting the chargeable amount calculated by the chargeable amount calculation unit 102c from the generated power W of the abnormal path. Then, according to the surplus power ΔW, the operating state of the load is controlled so that the amount of increase in the amount of consumed power CP in the load is adjusted. That is, the operating condition of the load is controlled such that the amount of increase in the power consumption amount CP of the load increases as the surplus power ΔW increases. Further, the operating condition of the load is controlled such that the amount of increase in the power consumption amount CP of the load decreases as the surplus power ΔW decreases.

  By performing such processing, it is possible not only to protect the storage battery from excessive generated power while suppressing an increase in fuel consumption accompanying the execution of the fail control, but also when the storage battery can be charged, The generated power can be effectively used to charge the storage battery.

  When a plurality of types of loads are provided as the load 20, a load for increasing the power consumption CP and a load for not increasing the power consumption CP may be selected according to various conditions. Further, in the case where a plurality of types of loads are prepared as the load 20, the loads that increase the power consumption amount CP may be prioritized.

  Therefore, in the present embodiment, of the loads 20 of the traveling system load 21 and the non-traveling system load 22, the power consumption CP of the non-traveling system load 22 is preferentially increased in consideration of the influence on the vehicle traveling. Control the operating condition.

  Further, at this time, the operating state of the load is controlled so as to preferentially increase the power consumption CP of the unrecognized load 26 among the recognized load 25 and the unrecognized load 26. That is, if the power consumption amount CP of the unrecognized load 26 can be increased, the power consumption amount CP of the unrecognized load 26 is increased. Then, even if the power consumption CP of the unrecognized load 26 reaches the maximum value, the power consumption CP of the recognized load 25 is also increased if the power consumption CP is required to be further increased. .

  At this time, it is preferable that a plurality of types of load are prepared as the recognition load 25 and the non-recognition load 26, respectively, and among them, those for increasing the power consumption CP are prioritized. In the present embodiment, when a plurality of types of loads are prepared, it is assumed that the power consumption amount CP is set to increase sequentially from the one with the largest maximum value of the power consumption amount CP. This prioritization can be changed in accordance with various conditions.

  Next, the details of the above process will be described using the flowcharts of FIGS. 4 to 6 is repeatedly performed by the control unit 100 in a predetermined cycle in the operating state of the power supply system.

  When the flowchart of the abnormality determination process of FIG. 4 is started, first, it is determined whether or not the generator 10 is generating power (S11). For example, it is determined that power is being generated when the output voltage of the generator 10 becomes higher than the voltage between the terminals of each of the storage batteries 11 and 12 while the vehicle is traveling or decelerating. If it is determined that power generation is not in progress, the process ends (S11: NO). If it is determined that power generation is in progress (S11: YES), it is determined whether or not an abnormal state is present (S12). For example, when the integrated value of the current detected by the current sensors I1 to I4 provided in each of the electric paths L1 to L4 exceeds a predetermined control upper limit value, it is determined that an abnormal state is present. Alternatively, based on the detection results of the current and voltage sensors provided in each of the storage batteries 11 and 12, if there is a possibility that the generated power W is further supplied in each of the storage batteries 11 and 12 beyond the upper limit value of the SOC allowable range. It can be determined that it is an abnormal state.

  If it is determined that the state is not abnormal (S12: NO), the process ends. In this case, fail control will not be performed. On the other hand, if it is determined that the vehicle is in the abnormal state (S12: YES), fail control is performed (S13).

  That is, in the failure control subroutine of FIG. 5, first, switch control is performed (S20). That is, the switch on the electrical path (abnormal path) determined to be in the abnormal state is turned off, and the switch on the electrical path connecting the abnormal path and the load 20 is turned on. Then, load selection processing is performed to select a load for increasing the power consumption amount CP (S21).

  That is, in the load selection processing subroutine of FIG. 6, it is determined whether the power consumption CP of the non-traveling system load 22 of the load 20 is the maximum value MAX (S31). In this process, it is affirmed that the sum of the power consumptions CP of all the loads provided as the non-traveling system load 22 is the maximum value. For example, when a non-traveling system load 22 is provided with a seat heating device, a vehicle interior lighting device, an air conditioner, a headlight, a defogger, a drive load, and an engine cooling device, the power consumption of all these loads Yes if the sum of CP is the maximum value.

  If the power consumption CP of the non-traveling system load 22 is not the maximum value MAX (S31: NO), whether the power consumption CP of the unrecognized load 26 of the non-traveling system load 22 is the maximum value MAX It determines (S32). For example, when a headlight, a defogger, a drive load, and an engine cooling device are provided as the non-recognition load 26, affirmation is made when the total of the power consumptions CP of all the loads is the maximum value.

  If the power consumption CP of the non-recognition load 26 is not the maximum value MAX (S32: NO), the non-recognition load 26 is selected as a load for increasing the power consumption CP by fail control (S33). On the other hand, when the power consumption CP of the unrecognized load 26 is the maximum value MAX (S32: YES), it is determined that the power consumption CP of the recognized load 25 is not the maximum value MAX (S34). In this case, the recognition load 25 is selected as a load for which the power consumption amount CP is increased by fail control (S35).

  When the load for which the power consumption amount CP is to be increased is selected by the above load selection processing, the process returns to the subroutine of FIG. 5 to determine whether or not an abnormality has occurred (S22). If an abnormality occurs (S22: YES), an abnormal part is determined (S23). Here, when it is determined that the abnormal part is the generator 10, the power consumption amount CP of the load selected in the load selection processing is initialized so as to be the maximum value (MAX) (S24). If it is determined that the abnormal part is a switch, the power consumption amount CP of the load selected in the load selection processing is initialized to increase the predetermined amount ΔCP (S25).

  On the other hand, when an abnormality has not occurred (S22: NO), the charge state of the storage battery is recognized (S26). In this process, the SOC of the storage battery, the chargeable amount, the temperature, etc. are recognized. Then, based on the recognized state of charge, surplus power ΔW is calculated (S27). The surplus power ΔW can be calculated by subtracting the chargeable amount from the generated power W of the abnormal path.

  If the surplus power ΔW is larger than the threshold Th1 (S28: YES), the amount of increase in the power consumption CP of the load 20 is set (adjusted) according to the surplus power ΔW (S29). The threshold value Th1 can be set to a value of zero or more in advance based on experiments and the like. On the other hand, if surplus power ΔW is smaller than threshold value Th1 (S28: NO), the process is ended. In this case, although it is determined that an abnormal state is present, processing for increasing the power consumption CP of the load 20 is not performed.

  Next, an execution example of the above process will be described with reference to FIG. In each of the following processes, the power consumption CP of the unrecognized load 26 is not the maximum value before execution of the fail control.

  (A) When an abnormality occurs in the generator 10 during charging of the lithium ion storage battery 12 by the generator 10.

  At the time of charging of the lithium ion storage battery 12 by the generator 10, when the generator 10 becomes abnormal and can not adjust the generated power W, the generated power W supplied to the electric path L2 (power supply path PL) becomes large and fail control Will be implemented. In this case, as the switch control, the switch 42 of the electric path L2 is turned off, and the switches 43 and 44 of the electric paths L3 and L4 are turned on, so that the generator 10 (lithium ion storage battery 12) and the load 20 are electrically Connected.

  Further, in the load selection process, the power consumption CP of the unrecognized load 26 of the load 20 is initially set to be increased to the maximum value MAX. For example, it is assumed that a headlight, a defogger, a drive load, and an engine cooling device are provided as the non-recognition load 26. In this case, the power consumption CP of all these loads can be raised to the maximum value. As a result, the amount of supplied power to the load 20 among the generated power W shown by the arrow A in the figure is increased. Along with this, the amount of supplied power to the lithium ion storage battery 12 in the generated power W shown by the arrow B in the figure is reduced.

  After the initial setting, the power consumption CP of the unrecognized load 26 is adjusted in accordance with the surplus power ΔW of the generated power W. That is, when the amount of increase of the power consumption CP is large compared to the surplus power ΔW, the amount of addition of the power consumption CP is reduced. On the other hand, when the amount of increase in the power consumption CP is insufficient compared to the surplus power ΔW, the operating state of the load is controlled to further increase the power consumption CP. Then, even if the power consumption amount CP of the unrecognized load 26 reaches the maximum value, the power consumption amount CP of the recognized load 25 is also increased if there is a shortage in the surplus power ΔW.

  (B) When the switch 43 breaks down during charging of the lithium ion storage battery 12 by the generator 10.

  At the time of charging of the lithium ion storage battery 12 by the generator 10, if an abnormality occurs in the switch 42, charging of the lithium ion storage battery 12 is unnecessary, and the switch 42 is in the on state in a situation where the switch 42 should be switched off. It will be continued. In this situation, fail control is implemented when the generated power W on the electric path L2 (power supply path PL) becomes equal to or greater than a predetermined value. In this case, as the switch control, the switch 42 of the electric path L2 is turned off, and the switches 43 and 44 of the electric paths L3 and L4 are turned on, so that the generator 10 (lithium ion storage battery 12) and the load 20 are electrically Connected.

  Further, in the load selection process, the power consumption amount CP of the unrecognized load 26 of the load 20 is initially set to increase by a predetermined amount ΔCP. For example, it is assumed that a headlight, a defogger, a drive load, and an engine cooling device are provided as the non-recognition load 26. In this case, the power consumption amount CP of one of the loads is increased by a predetermined amount. Alternatively, the power consumption amount CP of each load may be uniformly increased such that the total of the increase amounts of the power consumption amount CP of the plurality of loads becomes a predetermined amount ΔCP. As a result, the amount of supplied power to the load 20 among the generated power W shown by the arrow A in the figure is increased. Along with this, the amount of supplied power to the lithium ion storage battery 12 in the generated power W shown by the arrow B in the figure is reduced.

  After the initial setting, the power consumption CP of the unrecognized load 26 is adjusted in accordance with the surplus power ΔW of the generated power W. That is, when the amount of increase of the power consumption CP is large compared to the surplus power ΔW, the amount of addition of the power consumption CP is reduced. On the other hand, when the amount of increase in the power consumption CP is insufficient compared to the surplus power ΔW, the operating state of the load is controlled to further increase the power consumption CP. Then, even if the power consumption amount CP of the unrecognized load 26 reaches the maximum value, the power consumption amount CP of the recognized load 25 is also increased if there is a shortage in the surplus power ΔW.

  According to the above, the following excellent effects can be achieved.

  · A generator 10 that generates electric power by the power of the engine, a storage battery (lead storage battery 11, lithium ion storage battery 12) to which the generated power W of the generator 10 is supplied, a load 20 to which power is supplied from the generator 10 and the storage battery, 30 and a power supply system provided with electrical paths L1 to L4 connecting these to one another, and switches 41 to 44 for switching the electrical connection state of the generator 10, the storage battery and the loads 20, 30 to one another If an abnormality occurs in the machine 10 or an abnormality occurs in the switches 41 to 44 that switches the electrical connection between the generator 10 and the storage battery, the generated power W is excessively supplied from the generator 10 to the storage battery. There is a possibility that the storage battery may cause some trouble.

  Therefore, under the power generation state where the generator 10 is generating, the power supply path PL, which is an electric path connecting the generator 10 and the storage battery, becomes an abnormal state where the generated power W of a predetermined level or more is an abnormal path. Determine if it is. When it is determined that the load 20 is in an abnormal state, the operating condition of the load is controlled so as to increase the power consumption CP at the load 20, 30.

  By performing this process, the amount of power supplied to the loads 20 and 30 among the generated power W of the abnormal path is increased, and the amount of power supplied to the storage battery is decreased. Thus, the storage battery can be protected from excessive power supply.

  It should be noted that when the power generation W is excessively supplied from the generator 10 to the storage battery, the electric path for stopping the power generation of the generator 10 or connecting the generator 10 and the storage battery (power supply path It is conceivable to perform stop processing to turn off the switch of PL). However, when there is an abnormality in the generator 10 or the switch in the first place, there is a possibility that such stop processing can not be performed correctly. Further, even if the stop processing can be executed correctly, there is a possibility that excessive generated power W may be supplied to the storage battery after the occurrence of the abnormal state until the stop processing is executed. Furthermore, even if the stop processing can be executed correctly, there is a possibility that the stop processing can not be executed correctly after that due to the abnormality of the generator 10 or the switch.

  Also in this case, if the operating states of the loads 20 and 30 are controlled so as to increase the power consumption CP at the loads 20 and 30 together with the stop processing, the stop processing is executed after an abnormal state occurs. The storage battery can be protected from excessive generated power W even before the In addition, even if the stop processing is not executed correctly, the amount of power generation W supplied to the storage battery is reduced along with the increase in the power consumption CP of the loads 20 and 30. The storage battery can be protected from excessive generated power W.

  -As the load, among the load 30 which is a control device that performs control in the power supply system and the system accompanying the power supply system and the load 20 other than the control device, the power consumption CP of the load 20 is increased. Since the operation state of the load 20 is controlled, the storage batteries 11 and 12 can be protected from excessive power supply while avoiding the influence on the operation of the power supply system.

  Of the traveling system load 21 for changing the traveling state of the vehicle equipped with the engine and the other non-traveling system load 22, the power consumption CP is increased for the non-traveling system load 22. Of the generated power W supplied to the power supply path PL, the generated power W supplied to the load 20 can be increased while avoiding the influence on the traveling state of the vehicle. Therefore, the storage batteries 11 and 12 can be protected from excessive power supply while avoiding the influence on the traveling of the vehicle.

  -Increasing the power consumption CP of the load to protect the storage battery from excessive generated power W leads to an increase in fuel consumption in the engine. Therefore, the amount of increase of the consumed power amount CP due to the load is adjusted in accordance with the generated power W of the abnormal path. As described above, it is possible to protect the storage battery from excessive generated power W while suppressing the increase amount of the power consumption amount CP of the load to a necessary amount.

  In the case where an abnormality occurs in the generator 10, the possibility that the generated power W supplied to the electric path may rapidly increase when an abnormality occurs may be higher than in the case where an abnormality occurs in the switch. Therefore, it is specified whether the abnormal point is the generator or the switch, and if the abnormal point is the generator 10, the power consumption of the load at the time of occurrence of the abnormality compared to the case where the abnormal point is the switch The operating condition of the load was controlled to increase the increase amount of CP. By such processing, the storage battery can be more appropriately protected from the excess generated power W in accordance with the abnormal point.

  -When the storage battery can be charged, the amount of increase in power consumption CP of the load is adjusted after securing the amount of power necessary for the charging. By such processing, the storage battery can be protected from excess generated power W while effectively using the generated power W.

  -Even if it is determined by the abnormality determination unit 103 that there is an abnormal state, if the chargeable amount of the storage battery connected to the abnormal path is larger than the generated power W of the abnormal path, the power consumption CP of the load is increased. Since the process is not performed, it is possible to protect the storage battery from excessive generated power W while suppressing an increase in fuel consumption for protection of the storage battery.

  -As the battery temperature of the storage battery becomes higher, the effects of accelerating the deterioration of the storage battery become greater. Therefore, after the abnormal state is determined and the abnormal point is identified, the operating condition of the load is controlled so that the increase amount of the power consumption amount CP of the load becomes larger as the battery temperature of the storage battery becomes higher. I made it. As described above, the effect of protecting the storage battery can be enhanced as compared to the case where the battery temperature of the storage battery is not considered.

  -Since the load for increasing the power consumption CP is selected according to the generated power W of the abnormal path, it is possible to suppress the occurrence of excess or deficiency in the increase in the power consumption CP of the load.

  -When there is a recognition load 25 by which the occupant can recognize the driving state of the load and the other non-recognition load 26 as the load, the power consumption amount CP is preferentially given to the non-recognition load 26 among them. Since the increase is made, it is possible to increase the power consumption amount CP of the load while considering the influence on the occupant.

  · In the case where there is a thermal load 23 that heats and operates by energization and another non-thermal load 24 as the load, the thermal load 23 tends to have a larger maximum value of the power consumption CP compared to the non-thermal load 24 is there. Therefore, the power consumption CP of the thermal load 23 among the thermal load 23 and the non-thermal load 24 is preferentially increased, so that the power consumption CP of the load can be more efficiently increased.

  -When it is determined that an abnormal state is present, the switch (first switch) of the power supply path PL (abnormal path) connecting the generator 10 and the storage battery is turned off, and on the electrical path connecting the abnormal path and the load Turn on the switch (second switch). Furthermore, since the operating state of the load is controlled to increase the power consumption amount CP at the load, the configuration for protecting the storage batteries 11 and 12 from excessive generated power W can be duplicated.

  That is, when the switch control is performed in the abnormal state, if the first switch on the abnormal path is normal, the first switch is switched off to supply the generated power W to the storage battery. Can block Further, even if the state of the first switch is not properly switched by the switch control due to the abnormality of the first switch, the amount of power supplied to the storage battery is increased as the amount of generated power W supplied to the load increases. Since it is decreasing, the storage battery is protected from excessive generated power W.

  -In a power supply system provided with two power supplies such as lead storage battery 11 and lithium ion storage battery 12 connected in parallel to generator 10 as storage batteries, abnormality determination unit 103 is configured to connect electric power to connect generator 10 and lead storage battery It is determined whether or not each of the supply path PL (first power supply path), the power supply path PL (second power supply path) connecting the generator 10 and the lithium ion storage battery 12 is in an abnormal state. Then, the load control unit 104 controls the operating condition of the load so as to increase the power consumption amount CP of the load when it is determined that the power supply path PL is in the abnormal state in any of the power supply paths PL. .

  As described above, in the configuration in which a plurality of storage batteries are connected in parallel to the generator 10, each storage battery can be individually protected from excessive generated power W.

  · In the configuration in which a plurality of storage batteries (lead storage batteries 11 and lithium ion storage batteries 12) are connected in parallel to the generator 10, the power supply path PL connecting one storage battery and the generator 10 is in an abnormal state If the power supply path PL connecting the other storage battery and the generator 10 is not in the abnormal state, the generated power W is supplied to the storage battery connected to the power supply path PL not in the abnormal state. The supply amount of the generated power W to the connected storage battery can be reduced. In this case, the generated power W can be used to charge the storage battery. As described above, the storage battery can be protected from excessive generated power W while effectively utilizing the generated power W of the power supply path PL determined to be in the abnormal state.

  The load control unit 104 determines that the load control unit 104 is in an abnormal state when the power supply control device receives an operation command from the ECU 200, which is a host control device, and performs energization to the load based on the operation command. In this case, the command signal for increasing the power consumption CP of the load is output regardless of the operation command from the ECU 200, so the power consumption CP of the load can be increased more quickly. .

  The present invention is not limited to the contents described in the above embodiment, and may be implemented as follows. In the following description, the same components as those described above are denoted by the same reference numerals, and detailed descriptions thereof will be omitted. The embodiments can be combined with each other or alternatively selected and used.

  In the above description, the power consumption CP of the load 20 of the loads 20 and 30 is increased as fail control, but the power consumption CP of the load 30 may be increased as fail control. A specific example will be described with reference to FIG. 1. When it is determined that the electrical path L2 is in an abnormal state when the lithium ion storage battery 12 is charged by the generator 10, the electrical path L2 and the load 30 are connected. The switch 43 on the electrical path L3 is turned on. Thereby, in a state where the generator 10 (lithium ion storage battery 12) and the load 30 are electrically connected, the operating state of the load may be controlled to increase the power consumption CP of the load 30.

  In the above, the power consumption amount CP of both the load 20 and the load 30 may be increased as fail control. A specific example will be described with reference to FIG. 1. When it is determined that the electrical path L2 is in an abnormal state when the lithium ion storage battery 12 is charged by the generator 10, the electrical path L2 and the load 30 are connected. The switch 43 on the electrical path L3 is turned on to electrically connect the load 30 and the generator 10 (lithium ion storage battery 12). In addition to this, the switch 41 on the electrical path L1 connecting the electrical path L2 and the load 20 is turned on to electrically connect the load 20 and the generator 10. Then, the power consumption CP of both the load 20 and the load 30 may be increased.

  -Although the example which the electric path which connects the generator 10 and the lithium ion storage battery 12 becomes abnormal state was demonstrated above, when the electric path which connects the generator 10 and the lead storage battery 11 becomes abnormal state If the same fail control is performed, the lead storage battery 11 can be protected from excessive generated power. A specific example will be described. It is assumed that, at the time of charging of the lead storage battery 11 by the generator 10, it is determined that the electrical path L1 connecting the generator 10 and the lead storage battery 11 is abnormal. In this case, the switches 42 and 43 of the electric paths L2 and L3 are turned on to electrically connect the load 30 and the generator 10. By increasing the power consumption amount CP of the load 30 in this state, the supply amount of the generated power W to the lead storage battery 11 can be reduced. Therefore, the lead storage battery 11 can be protected from the excessive generated power W.

  In the above-mentioned FIG. 5, when it is determined that the electrical path is in the abnormal state, the switch control to switch off the switch on the abnormal path is performed as fail control, but this process is optional It may be That is, the process of S20 may be omitted in FIG. In this case, for example, when it is determined that the electrical path L2 is in an abnormal state, the switches 43 and 44 on the electrical paths L3 and L4 are switched on regardless of the state of the switch on the electrical path L2. May be Also in this case, the amount of power consumption CP of the load 20 is increased, whereby the supply amount of the generated power to the lithium ion storage battery 12 can be reduced.

  In the above-mentioned FIG. 5, although the initial setting of fail control at the time of abnormality occurrence is individually performed according to the abnormal part, the initial setting of fail control at the time of abnormality occurrence is uniformly performed regardless of the abnormal part. It may be That is, in FIG. 5, each process of S23 to S25 may be omitted. In this case, when it is determined that an abnormality has occurred (S22: YES), the power consumption amount CP of the load is increased by a predetermined amount regardless of the abnormal part, or the power consumption amount CP of the load is increased. Should be set so as to be the maximum value.

  In the above-described FIG. 5, the power consumption amount CP of the load 20 is adjusted according to the surplus power ΔW of the generated power W in S26 to S29, but each of these processes may be omitted. That is, when an abnormality occurs, the operating state of the load may be controlled such that the power consumption amount CP of the load is uniformly increased.

  In FIG. 5 described above, it is preferable that fail control be performed in consideration of the battery temperature of the storage battery. That is, when the battery temperature of the storage battery is recognized in S26 of FIG. 5, the increase amount of the power consumption amount CP of the load may be variably set according to the battery temperature. For example, as the battery temperature of the storage battery becomes higher, the increase amount of the power consumption amount CP of the load is made larger. By performing such processing, it is possible to protect the storage battery from excessive power generation W while protecting the storage battery from the deterioration of the battery accompanying the rise of the battery temperature.

  In the process of S29 in FIG. 5 above, in addition to increasing or decreasing the power consumption CP of the specific load 20, the sum of the increase in the power consumption CP of the plurality of loads included in the power supply system corresponds to the surplus power ΔW. You may control as follows. In this case, it is possible to suppress the change amount of the power consumption amount CP of each load accompanying the fail control.

  -In FIG. 6 described above, when it is determined that the power consumption CP of the non-traveling system load 22 is the maximum value (S31: YES), the power consumption CP of the traveling system load 21 may be increased. In this case, it is preferable that the amount of increase in the power consumption CP be dispersed among a plurality of types of loads belonging to the traveling system load 21 in order to avoid the influence of the specific load becoming large. Alternatively, of the traveling system load 21, the amount of consumed power CP of the type of load having little influence on the traveling of the vehicle may be preferentially increased.

  In FIG. 6 described above, when the non-traveling system load 22 is classified into the recognition load 25 and the non-recognition load 26, an example in which the power consumption amount CP of the non-recognition load 26 is preferentially increased is shown. In addition to this, when the non-traveling system load 22 is classified into the thermal load 23 and the non-thermal load 24, the power consumption amount CP of the thermal load 23 may be preferentially increased. Then, even if the power consumption amount CP of the heat load 23 is increased, the power consumption amount CP of the non-heat load 24 is further increased if there is a shortage in reducing the generated power W of the electrical path. May be That is, in FIG. 6, "non-recognition load" may be replaced with "heat load" and "recognition load" may be replaced with "non-heat load".

  In FIG. 6 described above, the non-traveling system load 22 is classified into the recognition load 25 and the non-recognition load 26, and is classified into the heat load 23 and the non-heat load 24, respectively. Then, these may be combined to prioritize loads that increase the power consumption amount CP when it is determined that an abnormal state is present. For example, for loads that are the unrecognized load 26 and classified as the thermal load 23, the priority in increasing the power consumption amount CP is made higher. On the other hand, for loads that are the recognition load 25 and the non-heat load 24, the priority in increasing the power consumption CP is lowered.

  In FIG. 6 described above, it is preferable to prioritize the loads for increasing the power consumption amount CP according to the abnormal point. That is, when the abnormal point is the generator 10, the power consumption amount CP of the load with the largest maximum value of the power consumption amount CP is preferentially increased. On the other hand, when the abnormal point is a switch, the power consumption amount CP of the load whose maximum value of the power consumption amount CP is small is preferentially increased. By doing this, it is possible to more appropriately increase the power consumption amount CP of the load according to the occurrence point of the abnormality.

  The priority of the load for increasing the power consumption CP can be set according to various conditions other than the above. For example, the priority among the loads 20 may be set according to the cabin environment. For example, in a situation where heating is used in the vehicle compartment, the power consumption amount CP of the heat load 23 of the load 20 is preferentially increased. On the other hand, when cooling is used in the passenger compartment, the power consumption CP of the non-heat load 24 of the load 20 is preferentially increased.

  In FIG. 4 described above, the abnormal state may be determined in consideration of the SOC of the storage battery. That is, in S12 of FIG. 4, when the generated power of the power supply path PL is equal to or more than a predetermined value and the SOC of the storage battery exceeds the upper limit of the SOC allowable range, it may be determined as an abnormal state.

  -As shown in FIG. 1 described above, in the case where a plurality of storage batteries are connected in parallel to the generator 10 and charge and discharge are possible between the storage batteries, electricity connected to one storage battery If it is determined that the path is in an abnormal state and the other storage battery is in a chargeable state, charging of the other load may be performed before fail control is performed. In this case, the storage battery can be protected from excessive generated power while effectively using the generated power W.

  In FIG. 1 described above, a bypass path may be provided to ensure the dark current to each of the loads 20 and 30 required when the power is off. Specifically, in FIG. 1, a first bypass path is provided to be connected in parallel to the switch 41. Also, a second bypass path is provided so as to be connected in parallel with the switch 41 and the switch 44, and the switch 43 and the switch 43. Each bypass path is provided with a bypass relay which is switched between conduction and non-conduction by energization of a coil. By providing the bypass paths in this manner, even if the switches 41 to 44 are turned off, the dark current is supplied from the storage batteries 11 and 12 to the loads 20 and 30, respectively. , 30 can be in a standby state.

  -In above-mentioned FIG. 1, the example of the power supply system of the structure by which two storage batteries were connected in parallel with respect to the generator 10 was shown. In addition to the above, each of the above-described embodiments can be applied to a power supply system including a configuration in which the generator 10 and at least one storage battery are connected by an electrical path.

  FIG. 8 shows a power supply system of a modified example. The power supply system includes a generator 10, a lead storage battery 11, a lithium ion storage battery 12, a starter 13, loads 20 and 30, switches 45 and 46, and a control unit 100. Among these, the lithium ion storage battery 12, the switches 45 and 46, and the control unit 100 are housed in a housing and integrated to form a battery unit U. Among these, the switches 45 and 46 and the control unit 100 are mounted on the same substrate (not shown). The battery unit U is provided with a first terminal P1 and a second terminal P2 as external terminals. The lead storage battery 11, the starter 13, and the loads 20 and 30 are connected to the 1st terminal P1 among these. The generator 10 is connected to the second terminal P2. Further, in the battery unit U, a plurality of electric paths L5 and L6 for mutually connecting the terminals P1 and P2 and the lithium ion storage battery 12 are provided as an electric path in the unit. And switches 45 and 46 are provided in each electric path L5 and L6.

  Describing in detail, the electric path L5 is a path connecting the first terminal P1 and the second terminal P2, and the switch 45 is provided on the path. A connection point N5 is formed between the switch 45 and the second terminal P2. The electrical path L6 is a path connecting the connection point N5 of the electrical path L5 and the storage battery 16, and the switch 46 is provided on the path. Therefore, the generator 10, the lead storage battery 11, and the loads 20, 30 and the like are connected via the electric path L5. Moreover, the generator 10 and the lithium ion storage battery 12 will be connected via the electrical path L6.

  In the above configuration, when charging the lithium ion storage battery 12 with the power generated by the generator 10, the abnormality determination unit 103 of the control unit 100 causes the electric power supply path PL, which is the power supply path PL, to generate a predetermined power or more. When it is determined that the abnormal condition is supplied, the switch control unit 101 turns on the switch 45 to connect the generator 10 and the loads 20 and 30. In this state, the load control unit 104 increases the power consumption CP of at least one of the loads 20 and 30. Of the generated power W supplied to the electrical path L6 determined to be in the abnormal state by such processing, the amount of supply to the loads 20 and 30 is increased, and accordingly, the lithium ion storage battery 12 is Supply can be reduced. Therefore, also in the configuration of FIG. 8, lithium ion storage battery 12 can be protected from excessive generated power W.

  -In the above, when the electrical path connecting the generator and the storage battery becomes abnormal, the switch of the electrical path provided between the switch and the storage battery on the abnormal path and the load is turned on Thus, an example has been shown in which the load and the storage battery are electrically connected. Specifically, in FIG. 1, when charging the lithium ion storage battery 12, if the electric path L2 which is the power supply path PL becomes an abnormal path, the connection between the switch 42 and the lithium ion storage cell 12 is performed. The load 20 and the lithium ion storage battery 12 are electrically connected by turning on the switches 43 and 44 provided on the electrical paths L3 and L4 between the point N3 and the load 20, respectively. Besides this, when the electrical path connecting the generator and the storage battery becomes abnormal, turn on the switch on the electrical path provided between the switch of the generator and the abnormal path and the load. The generator 10 and the load may be electrically connected. Specifically, in FIG. 1, when charging the lithium ion storage battery 12, when the electric path L2 which is the power supply path PL becomes an abnormal path, the connection point between the generator 10 and the switch 42 By turning on the switch 41 of the electrical path L1 connected to N2 and the load 20, the generator 10 and the load 20 are directly connected via the electrical path L1. Also in this case, if the operating state of the load 20 is controlled so that the power consumption CP of the load 20 increases, the amount of supply of the generated power W to the lithium ion storage battery 12 can be reduced.

  DESCRIPTION OF SYMBOLS 10 ... Generator, 11 ... Lead storage battery, 12 ... Lithium ion storage battery, 16 ... Storage battery, 20 ... Load, 30 ... Load, 41-46 ... Switch, 103 ... Abnormality determination part, 104 ... Load control part.

Claims (16)

A generator (10) that generates electricity from the power of the engine,
Storage batteries (11, 12) to which the power generated by the generator is supplied;
A load (20, 30) to which power is supplied from the generator and the storage battery;
A switch (41 to 46) provided on an electrical path (L1 to L6) connecting the generator, the storage battery, and the load to each other, and switching the electrical connection state of the generator, the storage battery, and the load to each other ,
Applied to the power supply system provided with
Under the power generation state where the generator is generating, the power supply path, which is the electric path connecting the generator and the storage battery, becomes an abnormal state where the generated power of a predetermined level or more is an abnormal path. An abnormality determination unit (103) that determines the presence or absence of
A load control unit (104) that controls the operating state of the load so as to increase the amount of power consumed by the load when it is determined that the abnormal state is present;
Power control device comprising: The load includes a first load (20) that is a control device that performs control in the power supply system and a system associated with the power supply system, and a second load (30) other than the control device.
When it is determined that the load control unit is in the abnormal state, the load control unit is configured to increase the power consumption of the second load among the first load and the second load. The power supply control device according to claim 1 which controls. The load includes a traveling system load (21) for changing a traveling state of a vehicle equipped with the engine, and other non-traveling system loads (22).
The load control unit is configured to increase the power consumption of the non-traveling system load among the traveling system load and the non-traveling system load when it is determined that the abnormal state is present. The power supply control device according to claim 1, which controls an operating state.   The said load control part controls the driving | running state of the said load so that the increase amount of the power consumption by the said load is adjusted according to the said generated power of the said abnormal path | route. The power supply control device according to. The abnormality determination unit includes a specification unit (103a) that specifies which one of the generator and the switch is the abnormality point.
When the abnormal part is the generator, the load control unit is configured to increase the amount of increase in power consumption of the load when an abnormality occurs, as compared to when the abnormal part is the switch. The power supply control device according to any one of claims 1 to 4, which controls an operation state of the load. The storage state of the storage battery is controlled such that the storage amount of the storage battery falls within a range of a predetermined lower limit voltage and a predetermined upper limit voltage,
A charge recognition unit (102a) that recognizes the storage amount of the storage battery;
And a chargeable amount calculation unit (102c) for obtaining the chargeable amount of the storage battery from the difference between the storage amount recognized by the charge recognition unit and the storage amount at the upper limit voltage;
The said load control part controls the driving | running state of the said load so that the increase amount of the power consumption by the said load may be adjusted, deducting the chargeable amount of the said storage battery. The power supply control device according to.   The load control unit does not perform processing for increasing the power consumption of the load when the chargeable amount of the storage battery connected to the abnormal path is larger than the power generation of the abnormal path. The power supply control device according to 6. A temperature recognition unit (102b) that recognizes the battery temperature of the storage battery;
8. The load control unit according to any one of claims 1 to 7, wherein the load control unit controls the operating state of the load such that the amount of increase in power consumption at the load increases as the battery temperature recognized by the temperature recognition unit increases. The power supply control device according to any one of the preceding claims. The electrical path is provided with a plurality of types of loads having different maximum values of power consumption,
The load control unit is configured to select the load for which the power consumption is increased according to the generated power of the abnormal path when the abnormality determination unit determines that the abnormal state is present. The power supply control device according to any one of 1 to 8. The load includes a recognition load (25) by which the occupant can recognize the driving state of the load, and a non-recognition load (26) other than the recognition load.
The load control unit is configured to increase the power consumption of the unrecognized load among the recognized load and the unrecognized load when the load control unit is determined to be in the abnormal state. The power supply control device according to any one of claims 1 to 9, which controls The load includes a thermal load (23) heated by energization and other non-thermal loads (24).
The load control unit is configured to, when it is determined that the abnormal state is present, the operating state of the load to preferentially increase the power consumption of the heat load among the heat load and the non-heat load. The power supply control device according to any one of claims 1 to 10 which controls. As the switch, a first switch (42 or the like) provided on the power supply path, which is the electric path connecting the generator and the storage battery, and the electrical path connecting the power supply path and the load And a second switch (43 or the like) provided on the
A switch control unit (101) for switching on and off of the switch;
The switch control unit performs switch control to turn off the first switch and turn on the second switch when it is determined that the abnormal state is present,
The power supply according to any one of claims 1 to 11, wherein the load control unit controls an operating state of the load so as to increase power consumption at the load in a state where the switch control is performed. Control device. The present invention is applied to a power supply system including, as the storage battery, a first storage battery (Pb) and a second storage battery (Li) connected in parallel to the generator.
As a switch provided in the electric path, a first switch (41 or the like) provided in a first power supply path connecting the generator and the first storage battery, and a second connecting the generator and the second storage battery And a second switch (42 or the like) provided in the power supply path,
The abnormality determination unit determines whether the abnormal state is in any one of the first power supply path and the second power supply path under a power generation state in which the generator is generating power;
The load control unit is configured to increase the power consumption of the load when it is determined that the load control unit is in an abnormal state in any of the first power supply path and the second power supply path. The power supply control device according to any one of claims 1 to 12, which controls an operating state. The storage state of each storage battery is controlled so that the storage amount of the storage battery falls within a predetermined lower limit voltage range and an upper limit voltage range,
A charge recognition unit (102a) for recognizing the storage amount of each storage battery;
And a chargeable amount calculation unit (102c) for calculating the chargeable amount of each storage battery from the difference between the storage amount recognized by the recognition unit and the storage amount at the upper limit voltage;
The load control unit is determined by the abnormality determination unit to be in the abnormal state, and the storage batteries are connected to a third storage battery connected to the abnormal path, and the electrical path other than the abnormal path. When the fourth storage battery can be charged, the power consumption at the load is increased while subtracting the chargeable amount of the fourth storage battery. The power supply control device according to claim 13, which controls an operating state of the load. The power supply control device according to any one of claims 1 to 14,
The generator;
A storage battery to which the generated power is supplied;
The load to which power is supplied from the generator and the storage battery;
An electrical path connecting the generator, the storage battery and the load together;
A switch provided in the electrical path to switch the electrical connection state of the generator, the storage battery and the load with each other;
A power supply system comprising: The power supply control device inputs an operation command from the host control device (200), and causes the load to be energized based on the operation command.
When it is determined that the load control unit is in an abnormal state, the load control unit sends a command signal for increasing the power consumption of the load to the load regardless of the operation command from the host control device. The power supply system according to claim 15, wherein the power supply system outputs the data.

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