JP5673062B2 - Charging device and vehicle including the same - Google Patents

Description

  The present invention relates to a charging device and a vehicle including the same, and more particularly to a charging device for charging a power storage device by an external power source provided outside a facility in which the power storage device is mounted and a vehicle including the same.

  Japanese Patent Laid-Open No. 8-98423 (Patent Document 1) discloses a charging device for a secondary battery. In this charging device, the temperature differential calculation unit calculates a temperature differential value indicating the amount of temperature increase per unit time of the secondary battery. Then, the charge control unit determines whether or not the battery voltage has reached a predetermined value when the temperature differential value reaches the set value, and terminates the quick charge if the battery voltage has reached the predetermined value.

  According to this charging apparatus, it is possible to prevent insufficient charging due to erroneous determination of full charge, and to suppress overcharge due to rapid charging of a fully charged battery (see Patent Document 1). ).

JP-A-8-98423 JP-A-11-111349 JP 2005-117722 A

  However, in the charging device described above, when an abnormality in charging control that cannot be detected by the charging control unit itself, such as runaway of the device in which the charging control unit is mounted or inability to communicate with the charging control unit, the battery voltage becomes a predetermined value. Incorrect determination of whether or not the battery has reached the limit may cause the battery to be overcharged without being able to end the charge in a timely manner or even stopping the charge.

  SUMMARY OF THE INVENTION Therefore, an object of the present invention is to reliably suppress overcharging of a power storage device even when an abnormality in charge control that cannot be detected by a device that executes charge control occurs.

  According to the present invention, the charging device is a charging device for charging the power storage device with an external power source provided outside the facility in which the power storage device is mounted, and includes a charger, a charge control device, and a power storage control device. And a monitoring device. The charger receives power from an external power source and charges the power storage device. The charge control device controls charging of the power storage device by the charger. The power storage control device controls the state of charge of the power storage device. The monitoring device receives information indicating the control state of the charger by the charge control device and information indicating the charging status of the power storage device from the charge control device and the power storage control device, respectively, and monitors charge control abnormality based on the received information To do. Then, when an abnormality in charging control is detected, the monitoring device executes control for stopping charging of the power storage device by the charger.

  Preferably, the charger includes a switching element for power conversion. When an abnormality in the charging control is detected, the monitoring device outputs a command for instructing the gate-off of the switching element to the charger.

  Preferably, the charging device further includes a circuit breaker. The circuit breaker is provided in the power supply path from the external power source to the charger. When an abnormality in charging control is detected, the monitoring device outputs a command for instructing interruption of the power feeding path to the circuit breaker.

  Preferably, when the contradiction between the control state of the charger by the charge control device and the charging state of the power storage device is detected, the monitoring device executes control for stopping charging of the power storage device by the charger.

  According to the invention, the vehicle includes any one of the above-described charging devices, a power storage device charged by the charging device, and an electric motor that generates a driving force using the electric power stored in the power storage device. .

  In the present invention, there is provided a monitoring device for monitoring an abnormality of the charging control based on information indicating the control state of the charger by the charging control device and information indicating the charging status of the power storage device. And when abnormality of charge control is detected, the monitoring apparatus will perform control for stopping the charge of the electrical storage apparatus by a charger. Therefore, according to the present invention, it is possible to reliably suppress overcharging of the power storage device even if an abnormality in charge control that cannot be detected by the charge control device itself occurs.

1 is an overall block diagram of a vehicle equipped with a charging device according to an embodiment of the present invention. It is the figure which showed the structure of the charger shown in FIG. It is the figure which showed the control pilot circuit for remotely operating CCID of EVSE from a vehicle by operating the electric potential of a pilot signal in a vehicle. It is a wave form diagram of pilot signal CPLT. It is the figure which showed the detail of the function of each CPU shown in FIG. 1, and an example of the information exchanged between each CPU and a charger.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

  FIG. 1 is an overall block diagram of a vehicle equipped with a charging device according to an embodiment of the present invention. Referring to FIG. 1, vehicle 10 includes a power storage device 12, a system main relay (hereinafter referred to as “SMR (System Main Relay)”) 14, a power control unit (hereinafter referred to as “PCU (Power Control Unit)”). 16), a power output device 18, and a drive wheel 20. Further, the vehicle 10 includes an inlet 22, a charger 24, a battery CPU (Central Processing Unit) 26, a power source CPU 28, a charge control CPU 30, a charge control monitoring CPU 32, a voltage sensor 34, and a current sensor 38. Further prepare.

  An external power supply 50, an EVSE (Electric Vehicle Supply Equipment) 52, and a connector 58 are provided outside the vehicle 10. The EVSE 52 includes a CCID (Charging Circuit Interrupt Device) 54 and a CPLT control circuit 56.

  The power storage device 12 is a rechargeable DC power supply, and is constituted by, for example, a secondary battery such as nickel metal hydride or lithium ion. The power storage device 12 stores power generated by the power output device 18 in addition to power supplied from the external power supply 50. Note that a large-capacity capacitor can also be employed as the power storage device 12. SMR 14 is provided between power storage device 12 and PCU 16. SMR 14 is a relay for electrically connecting / disconnecting power storage device 12 and PCU 16.

  The PCU 16 collectively represents a power conversion device that receives power from the power storage device 12 and drives the power output device 18. For example, PCU 16 includes an inverter for driving a motor included in power output device 18, a converter for boosting the power output from power storage device 12, and the like. The power output device 18 collectively shows devices for driving the drive wheels 20. For example, the power output device 18 includes a motor and an engine that drive the drive wheels 20. The power output device 18 generates power when the vehicle is braked by a motor that drives the drive wheels 20 and outputs the generated power to the PCU 16.

  On the other hand, the external power supply 50 is provided outside the vehicle and is configured by, for example, a commercial power supply. The EVSE 52 is configured to be able to cut off an electric circuit for supplying electric power from the external power supply 50 to the vehicle 10. The EVSE 52 is provided, for example, in a charging cable for supplying electric power from the external power supply 50 to the vehicle 10 or in a charging stand for supplying electric power to the vehicle 10 via the charging cable. The CCID 54 is a circuit breaker provided in a power supply path from the external power supply 50 to the vehicle 10 and is controlled by the CPLT control circuit 56.

  CPLT control circuit 56 generates pilot signal CPLT and outputs the generated pilot signal CPLT to vehicle 10 via the control pilot line. Pilot signal CPLT is operated at a potential in vehicle 10, and CPLT control circuit 56 controls CCID 54 based on the potential of pilot signal CPLT. That is, the CCID 54 can be remotely operated from the vehicle 10 by operating the potential of the pilot signal CPLT in the vehicle 10. The pilot signal CPLT conforms to, for example, “SAE J1772 (SAE Electric Vehicle Conductive Charge Coupler)” in the United States.

  Inlet 22 is configured to be connectable to a connector 58 of a charging cable for supplying electric power from external power supply 50 to vehicle 10. When charging power storage device 12 with external power supply 50 (hereinafter also referred to as “external charging”), inlet 22 receives power supplied from external power supply 50.

  Charger 24 is connected to positive line PL and negative line NL arranged between SMR 14 and PCU 16. The charger 24 includes a switching element for power conversion, and converts the power supplied from the external power supply 50 into a predetermined charging voltage (DC) based on a control signal from the charging control CPU 30. The power converted into voltage by the charger 24 is supplied to the power storage device 12, and the power storage device 12 is charged. Further, when the charger 24 receives a gate cutoff command STP from a charge control monitoring CPU 32 (described later), the charger 24 stops operation by shutting off the gate of the switching element regardless of the control signal from the charge control CPU 30.

  Voltage sensor 34 detects voltage VB of power storage device 12 and outputs the detected value to battery CPU 26. Current sensor 38 detects current IB input / output to / from power storage device 12 and outputs the detected value to battery CPU 26.

  Battery CPU 26 calculates the remaining capacity (hereinafter referred to as “SOC”) of power storage device 12 based on the detected values of voltage VB and current IB of power storage device 12. The battery CPU 26 also calculates a limit value of charge / discharge power, detects a fully charged state, and the like. Further, the battery CPU 26 outputs information indicating the charging status of the power storage device 12 (such as SOC and limit value of charging power) to the charging control monitoring CPU 32.

  The power supply CPU 28 generates a system activation trigger and turns on / off the CCID 54 of the EVSE 52 during external charging. The on / off operation of the CCID 54 is remotely operated by the power supply CPU 28 using the pilot signal CPLT. That is, the power supply CPU 28 receives the pilot signal CPLT from the CPLT control circuit 56 of the EVSE 52, and remotely operates the CCID 54 by operating the potential of the pilot signal CPLT based on the CPLT control command from the charge control CPU 30. Further, when the power supply CPU 28 receives the cutoff command CUT of the CCID 54 from the charge control monitoring CPU 32, the power supply CPU 28 turns off the CCID 54 by operating the potential of the pilot signal CPLT regardless of the CPLT control command from the charge control CPU 30.

  Charging control CPU 30 executes various processes for controlling charging of power storage device 12 by charger 24 during external charging. For example, charging control CPU 30 outputs a CPLT control command for remotely operating CCID 54 of EVSE 52 to power supply CPU 28. In addition, the charging control CPU 30 generates a start / stop command for the charger 24, a power command indicating a target value of the charging power, and the like, and outputs the command to the charger 24. Further, the charge control CPU 30 outputs information indicating the control state of the charger 24 (such as the status of the start / stop command of the charger 24) to the charge control monitoring CPU 32.

  The charging control monitoring CPU 32 receives information indicating the control state of the charger 24 from the charging control CPU 30 and receives information indicating the charging state of the power storage device 12 from the battery CPU 26. Based on these pieces of information, the charge control monitoring CPU 32 detects an abnormality in charge control that cannot be detected by the charge control CPU 30. As such an abnormality, for example, a runaway of the charging control CPU 30 itself, an abnormality of the charger 24 that does not appear in the status signal of the charger 24 notified from the charger 24 to the charging control CPU 30, and the like are assumed.

  Specifically, the charge control monitoring CPU 32 monitors whether or not the information indicating the control state of the charger 24 is inconsistent with the information indicating the charging status of the power storage device 12 for detecting the abnormality of the charge control. When a contradiction is detected, the charging control is determined to be abnormal. When an abnormality in the charging control is detected, the charging control monitoring CPU 32 executes control for stopping charging of the power storage device 12. Specifically, the charge control monitoring CPU 32 outputs a gate cutoff command STP to the charger 24 and outputs a cutoff command CUT for CCID 54 to the power supply CPU 28.

  In the vehicle 10, a charge control monitoring CPU 32 that monitors an abnormality in charge control by the charge control CPU 30 is provided. The charging control monitoring CPU 32 receives information indicating the control state of the charger 24 and information indicating the charging state of the power storage device 12 from the charging control CPU 30 and the battery CPU 26, respectively. When the charging control monitoring CPU 32 detects an abnormality in charging control based on the information, the charging control monitoring CPU 32 turns off the switching element of the charger 24 and turns off the CCID 54 of the EVSE 52.

  FIG. 2 is a diagram showing the configuration of the charger 24 shown in FIG. Referring to FIG. 2, charger 24 includes an AC / DC converter 72, a DC / AC converter 74, an insulating transformer 76, a rectifier circuit 78, a drive circuit 80, and a microcomputer 82.

  AC / DC converter 72 includes a switching element for power conversion, and converts the power supplied from external power supply 50 (FIG. 1) to DC power based on a drive signal from drive circuit 80 to convert the DC / AC converter. Output to 74. Further, when the AC / DC converter 72 receives a gate cutoff signal from the drive circuit 80, the AC / DC converter 72 cuts off the gate of the switching element.

  DC / AC converter 74 also includes a switching element for power conversion, and converts DC power from AC / DC converter 72 into AC power based on a drive signal from drive circuit 80 and outputs the AC power to isolation transformer 76. In addition, when the DC / AC converter 74 receives a gate cutoff signal from the drive circuit 80, it also shuts off the gate of the switching element.

  Insulation transformer 76 includes a core made of a magnetic material, and a primary coil and a secondary coil wound around the core. The primary coil and the secondary coil are electrically insulated and connected to the DC / AC converter 74 and the rectifier circuit 78, respectively. Insulation transformer 76 converts AC power from DC / AC converter 74 into a voltage corresponding to the turn ratio of the primary coil and the secondary coil, and outputs the voltage to rectifier circuit 78. The rectifier circuit 78 rectifies AC power received from the insulating transformer 76 into DC power and outputs the DC power to the power storage device 12.

  The drive circuit 80 generates a drive signal for driving the switching elements of the AC / DC converter 72 and the DC / AC converter 74 based on a command from the microcomputer 82. Further, when the drive circuit 80 receives a gate cutoff command STP from the charge control monitoring CPU 32 (FIG. 1), the drive circuit 80 generates a gate cutoff signal for shutting off the gates of the switching elements of each converter regardless of the command from the microcomputer 82. To do.

  The microcomputer 82 controls the drive circuit 80 based on a control signal received from the charge control CPU 30 (FIG. 1). Specifically, the microcomputer 82 starts / stops the drive circuit 80 based on the start / stop command received from the charge control CPU 30. Further, the microcomputer 82 performs feedback control so that the output power of the charger 24 follows the power command received from the charge control CPU 30. Further, the microcomputer 82 outputs a signal indicating the state (start / stop / abnormality etc.) of the charger 24 to the charge control CPU 30.

  In the charger 24, the microcomputer 82 receives a control signal from the charge control CPU 30, and the drive circuit 80 is controlled by the microcomputer 82. The drive circuit 80 drives the switching elements of the AC / DC converter 72 and the DC / AC converter 74.

  A gate cutoff command STP from the charge control monitoring CPU 32 is input to the drive circuit 80. When receiving a gate cutoff command STP from the charge control monitoring CPU 32, the drive circuit 80 shuts off the gates of the switching elements of the AC / DC converter 72 and the DC / AC converter 74 regardless of the command from the microcomputer 82.

  FIG. 3 is a diagram showing a control pilot circuit for remotely operating CCID 54 of EVSE 52 from vehicle 10 by manipulating the potential of pilot signal CPLT in vehicle 10. Referring to FIG. 3, the control pilot circuit is configured by a CPLT control circuit 56 of EVSE 52 and a power supply CPU 28.

  CPLT control circuit 56 includes an oscillator 102, a resistance element 104, and a voltage sensor 106. The oscillator 102 is operated by electric power supplied from the external power supply 50 (FIG. 1). The oscillator 102 outputs a non-oscillating pilot signal CPLT when the output potential of the resistance element 104 is in the vicinity of a specified potential V1 (for example, 12V). When the output potential of the resistance element 104 decreases from V1, the oscillator 102 outputs a specified frequency (for example, 1 kHz) and a pilot signal CPLT that oscillates at a duty cycle. The duty cycle is set based on the rated current that can be supplied from the external power supply 50 to the vehicle 10 via the charging cable.

  Power supply CPU 28 includes resistance elements 110 and 112, a switch 114, and an AND gate 116. Resistance element 110 is connected between a control pilot line through which pilot signal CPLT is transmitted and vehicle ground. Resistance element 112 and switch 114 are connected in series between the control pilot line and the vehicle ground. The switch 114 receives the output of the AND gate 116 and is turned on when the output of the AND gate 116 is at the H (logic high) level. The AND gate 116 calculates the logical product of the CPLT control command from the charge control CPU 30 and the CCID 54 cutoff command from the charge control monitoring CPU 32, and outputs the calculation result to the switch 114.

  Note that the CPLT control command from the charging control CPU 30 is a signal that becomes H level when the vehicle 10 can be externally charged. Further, the CCID cutoff command from the charge control monitoring CPU 32 is a signal that becomes H level when the charge control monitoring CPU 32 determines that the charge control system is normal. Therefore, the output of AND gate 116 is at H level when external charging is normally performed, but becomes L (logic low) level when the charging control monitoring CPU 32 detects an abnormality in the charging control system.

  In this control pilot circuit, when the connector 58 of the external power supply 50 is connected to the inlet 22 of the vehicle 10 in a state where the pilot signal CPLT is output from the CPLT control circuit 56 at the potential V1, the pilot signal CPLT is generated by the resistance element 110. Decreases from V1 to V2, and the pilot signal CPLT oscillates. When the preparation for external charging is completed in the vehicle 10, the output of the AND gate 116 becomes H level and the switch 114 is turned on (assuming that charging control abnormality is not detected in the charging control monitoring CPU 32). As a result, the potential of pilot signal CPLT further decreases from V2 to V3, and CCID 54 is turned on by CPLT control circuit 56 that detects that the potential of pilot signal CPLT has become V3.

  FIG. 4 is a waveform diagram of pilot signal CPLT. Referring to FIG. 3 together with FIG. 4, it is assumed that connector 58 of external power supply 50 is not connected to inlet 22 of vehicle 10 before time t1. At this time, the potential of pilot signal CPLT is V1, and pilot signal CPLT is in a non-oscillating state.

  When connector 58 is connected to inlet 22 at time t1, pilot signal CPLT is input to power supply CPU. Then, the potential of pilot signal CPLT is lowered from V1 to V2 by resistance element 110, and pilot signal CPLT oscillates.

  When preparation for external charging is completed in vehicle 10 at time t2, switch 114 of power supply CPU 28 is turned on based on the CPLT control command from charging control CPU 30 (the charging control monitoring CPU 32 detects an abnormality in charging control). Suppose not.) Then, the potential of pilot signal CPLT is further lowered from V2 to V3 by resistance elements 110 and 112. When the potential of pilot signal CPLT becomes V 3, CCID 54 is turned on by CPLT control circuit 56 in EVSE 52.

  Referring to FIG. 3 again, when an abnormality in charge control is detected in charge control monitoring CPU 32, the CCID cutoff command from charge control monitoring CPU 32 becomes L level, so the output of AND gate 116 becomes L level, and switch 114 Is turned off. Then, the potential of pilot signal CPLT rises from V3 to V2, and CCID 54 is turned off by CPLT control circuit 56.

  FIG. 5 is a diagram showing details of functions of the CPUs shown in FIG. 1 and an example of information exchanged between the CPUs and the charger 24. Referring to FIG. 5, power supply CPU 28 executes a system activation process during external charging. Specifically, the power supply CPU 28 outputs a system activation trigger to the charge control CPU 30 when the connector 58 is connected to the inlet 22. Further, the power supply CPU 28 outputs information related to the pilot signal CPLT (whether or not input, potential, etc.) to the charge control CPU 30. Then, power supply CPU 28 operates the potential of pilot signal CPLT based on the CPLT control command received from charge control CPU 30, and remotely operates CCID 54 of EVSE 52. Furthermore, when the power supply CPU 28 receives a CCID 54 cutoff command from the charge control monitoring CPU 32, the power supply CPU 28 turns off the CCID 54 by operating the potential of the pilot signal CPLT.

  Battery CPU 26 calculates the SOC of power storage device 12 based on the detected values of voltage VB and current IB of power storage device 12. Various known methods can be used as the SOC calculation method. Further, the battery CPU 26 calculates a limit value Win indicating a limit on the charging power (W) to the power storage device 12 based on the calculated SOC. For example, the battery CPU 26 calculates the limit value Win so that the limit value Win decreases when the SOC falls below a predetermined lower limit value. Further, the battery CPU 26 also calculates a limit value Wout indicating a limit on the discharge power (W) from the power storage device 12 based on the SOC.

  In addition, battery CPU 26 determines full charge of power storage device 12 based on the detected values of voltage VB and current IB. Then, the battery CPU 26 outputs the power balance of the power storage device 12, the limit value Win, the result of the full charge determination, and the like to the charge control CPU 30. Further, the battery CPU 26 outputs the power balance of the power storage device 12 and the limit value Win to the charge control monitoring CPU 32 as information indicating the charging status of the power storage device 12.

  The charge control CPU 30 generates a CPLT control command for remotely operating the CCID 54 of the EVSE 52 during external charging, and outputs the CPLT control command to the power supply CPU 28. Further, the charging control CPU 30 executes start / stop processing of the charger 24. The charging control CPU 30 outputs a start / stop command for the charger 24 to the charger 24, and receives a status signal (start / stop / abnormality etc.) indicating the state of the charger 24 from the charger 24.

  Further, the charging control CPU 30 executes power feedback control for controlling the charging power by the charger 24 to a predetermined target value, generates a power command indicating the target value of the charging power, and outputs it to the charger 24. Furthermore, the charge control CPU 30 receives the result of the full charge determination from the battery CPU 26, and executes a charge end process when full charge is detected. Further, the charge control CPU 30 outputs the start / stop command state of the charger 24 to the charge control monitoring CPU 32 as information indicating the control state of the charger 24.

  The charge control monitoring CPU 32 receives information indicating the control state of the charger 24 (such as the start / stop command state of the charger 24) from the charge control CPU 30. Further, the charge control monitoring CPU 32 receives information (such as the power balance of the power storage device 12 and the limit value Win) indicating the charging status of the power storage device 12 from the battery CPU 26. Then, the charge control monitoring CPU 32 monitors charge control abnormality based on these pieces of information.

  For example, the charging control monitoring CPU 32 continues to be in a state where the charging power of the power storage device 12 is larger than a predetermined value despite receiving information from the charging control CPU 30 that a stop command has been output to the charger 24. When it is determined that the charging control is abnormal. Alternatively, when the charging power of power storage device 12 continuously exceeds limit value Win during external charging, charging control monitoring CPU 32 determines that charging control is abnormal. When it is determined that the charging control is abnormal, the charging control monitoring CPU 32 outputs a gate cutoff command to the charger 24 and outputs a CCID 54 cutoff command to the power supply CPU 28.

  As described above, in this embodiment, the charge control monitoring CPU 32 that monitors the abnormality of the charge control based on the information indicating the control state of the charger 24 by the charge control CPU 30 and the information indicating the charging state of the power storage device 12 is provided. Provided. When the charging control monitoring CPU 32 detects an abnormality in the charging control, the charging control monitoring CPU 32 executes the gate shutoff of the charger 24 and turns off the CCID 54 of the EVSE 52. Therefore, according to this embodiment, overcharge of power storage device 12 can be reliably suppressed even if an abnormality in charge control that cannot be detected by charge control CPU 30 itself occurs.

  In the above embodiment, the charger 24 is connected to the positive line PL and the negative line NL disposed between the SMR 14 and the PCU 16, but the charger 24 is connected between the power storage device 12 and the SMR 14. A charger 24 may be connected to the battery.

  In the above description, when an abnormality in the charging control is detected by the charging control monitoring CPU 32, the CCID 54 is turned off by remotely operating the CCID 54 from the vehicle 10 using the pilot signal CPLT. The method of cutting off the power supply path from 50 is not limited to such a method. The CCID 54 may be turned off by providing a separate signal line without using the pilot signal CPLT. When the circuit breaker is provided in the vehicle 10, the circuit breaker is directly controlled by the power supply CPU 28 or the charge control monitoring CPU 32. It may be.

  In the above description, when an abnormality in charge control is detected by the charge control monitoring CPU 32, the gate of the charger 24 is shut off and the CCID 54 of the EVSE 52 is turned off. Only one of OFF may be executed.

  The battery CPU 26, the power supply CPU 28, the charge control CPU 30 and the charge control monitoring CPU 32 may be provided in the same electronic control unit (ECU (Electronic Control Unit)), or may be divided into a plurality of ECUs.

  In the above description, the case where the charging device is applied to the vehicle 10 has been described. However, the charging device of the present invention can also be applied to equipment other than the vehicle (for example, an externally chargeable electrical appliance).

  In the above description, charge control CPU 30 corresponds to an embodiment of “charge control device” in the present invention, and battery CPU 26 corresponds to an embodiment of “storage control device” in the present invention. The charging control monitoring CPU 32 corresponds to an embodiment of “monitoring device” in the present invention, and the CCID 54 corresponds to an embodiment of “breaker” in the present invention.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and is intended to include meanings equivalent to the scope of claims for patent and all modifications within the scope.

  DESCRIPTION OF SYMBOLS 10 Vehicle, 12 Power storage device, 14 SMR, 16 PCU, 18 Power output device, 20 Drive wheel, 22 Inlet, 24 Charger, 26 Battery CPU, 28 Power supply CPU, 30 Charge control CPU, 32 Charge control monitoring CPU, 34, 106 voltage sensor, 38 current sensor, 50 external power supply, 52 EVSE, 54 CCID, 56 CPLT control circuit, 58 connector, 72 AC / DC converter, 74 DC / AC converter, 76 isolation transformer, 78 rectifier circuit, 80 drive circuit, 82 microcomputer, 102 oscillator, 104, 110, 112 resistance element, 114 switch, 116 AND gate.

Claims (4)

A charging device for charging the power storage device with an external power source provided outside the facility on which the power storage device is mounted,
A charger that receives power from the external power source and charges the power storage device;
A charge control device for controlling charging of the power storage device by the charger;
A power storage control device for controlling a state of charge of the power storage device;
Information indicating the control state of the charger by the charge control device and information indicating the charging status of the power storage device are received from the charge control device and the power storage control device, respectively, and abnormalities in charge control are determined based on the received information. A monitoring device for monitoring,
When an abnormality that cannot be detected by the charging control device itself is detected, the monitoring device executes control for stopping charging of the power storage device by the charger,
The charger includes a switching element for power conversion,
The monitoring device, when the charge control device undetectable abnormality in itself is detected, outputs a command for instructing the gate cut-off of the switching element to the charger, charging device. A circuit breaker provided in a power supply path from the external power source to the charger;
The monitoring device, when the charge control device undetectable abnormality in itself is detected, outputs a command for instructing the interruption of the power supply path to the circuit breaker, the charging device according to claim 1. The monitoring device executes control for stopping charging of the power storage device by the charger when a contradiction between a control state of the charger by the charge control device and a charging state of the power storage device is detected. The charging device according to claim 1 or 2 . The charging device according to any one of claims 1 to 3 ,
A power storage device charged by the charging device;
A vehicle comprising: an electric motor that generates a driving force using electric power stored in the power storage device.

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