JP6701902B2 - Battery system - Google Patents

Description

  The present invention relates to a battery system.

  A battery unit is attached to an electric vehicle such as an electric vehicle (EV) or a hybrid vehicle (HEV) that obtains driving force from a motor generator. The battery unit includes a battery that is a secondary battery and a battery control unit that controls the battery or measures the SOC (State of Charge) of the battery.

  A compatible vehicle model is defined for the battery unit, and it is necessary to mount the battery unit on an appropriate vehicle model according to the compatible vehicle model. Specifically, the compatible vehicle type is defined in the battery control unit included in the battery unit, and the compatible vehicle type of the battery control unit and the compatible vehicle type of the vehicle control unit that is provided in the vehicle body and controls the HEV/EV system. Must be matched (hereinafter, simply referred to as “matching the vehicle control unit and the battery control unit”). If the vehicle control unit and the battery control unit do not match, a problem may occur such that the battery ECU cannot operate properly.

  Conventionally, a technique for detecting a mismatch between the vehicle control unit and the battery control unit has been proposed. For example, in Patent Literature 1, when an electric vehicle receives a start instruction, a controller (vehicle control unit) provided in the vehicle body and a voltage monitoring unit (battery control unit) provided in the battery unit are disclosed. A technique is disclosed in which communication is performed to collate the identification information included in the controller with the identification information included in the voltage monitoring unit, and when the two match, the electric vehicle is started.

JP, 2014-50175, A

  As in the prior art, every time the electric vehicle is started (charging/discharging of the battery is started), the vehicle control unit and the battery control unit communicate with each other to perform the matching determination process for determining the matching between the two. Then, it takes time to start the electric vehicle. In addition, it is conceivable to shorten the communication cycle between the vehicle control unit and the battery control unit in order to reduce the start-up time of the electric vehicle. The communication load increases, and the cost of the communication path between the vehicle control unit and the battery control unit increases. In view of this, the inventor of the present application generally considers that the attachment/detachment work of the battery unit is performed with the auxiliary battery removed, and only when the electric vehicle receives the start instruction after the auxiliary battery is attached/detached, the above alignment is performed. It was devised to perform a judgment process.

  However, if the matching determination process is performed only when the electric vehicle receives a start instruction after the auxiliary battery is removed, the mismatch between the vehicle control unit and the battery control unit may not be detected. For example, if the vehicle control unit is replaced without removing the auxiliary battery, and if the vehicle control unit and the battery control unit are mismatched due to the replacement of the vehicle control unit, it cannot be detected.

  An object of the present invention is to reliably detect a mismatch between the vehicle control unit and the battery control unit while reducing the startup time of the electric vehicle without increasing the communication load between the vehicle control unit and the battery control unit. To notify.

A battery system according to the present invention is a vehicle control unit provided in a vehicle body of an electric vehicle, the vehicle control unit having first vehicle type information indicating a compatible vehicle type of the vehicle control unit, and the vehicle control unit attached to the vehicle body. A battery control unit provided in a battery unit including a secondary battery, the battery control unit having second vehicle type information indicating a compatible vehicle type of the battery control unit, and power supply to the vehicle control unit and the battery control unit. An auxiliary battery to be supplied, which is provided in either the vehicle control unit or the battery control unit, and includes vehicle vehicle type information indicating a vehicle type of the electric vehicle, the first vehicle type information, and the second vehicle type information. a matching determination unit that performs matching determination process determines whether the match, the charging and discharging before the start of the secondary battery according to an instruction from the user, the first time the user after the auxiliary battery is desorbed A matching determination unit that performs the matching determination process only when receiving a charging/discharging start instruction of the secondary battery from the above , and further performs the matching determination process immediately after each charging/discharging start of the secondary battery instructed by the user. And a determination result information storage unit that is provided in the battery control unit and stores determination result information indicating a determination result of the matching determination unit, and the battery control unit stores in the determination result information storage unit. When the determined determination result information indicates that the vehicle model information, the first vehicle model information, and the second vehicle model information are matched , charging and discharging of the secondary battery is started , and the electric vehicle is started. After that, when it is determined that the vehicle vehicle type information, the first vehicle type information, and the second vehicle type information do not match, a control for outputting a warning is performed.

  According to the above configuration, before starting the electric vehicle, the matching determination process for determining the matching between the vehicle control unit and the battery control unit is performed only when the electric vehicle receives the start instruction after the auxiliary battery is detached. The determination result information indicating the result is stored in the determination result information storage unit provided in the battery control unit. As a result, the battery control unit determines that the first vehicle type information and the second vehicle type information are consistent when the second and subsequent activation instructions are received, as long as the auxiliary battery is not removed. The electric vehicle can be activated based on the information. That is, when the second or later activation instruction is received after the auxiliary battery is detached, communication between the vehicle control unit and the battery control unit is performed every time the electric vehicle is activated to perform the matching determination process. Since there is no need, the startup time of the electric vehicle can be shortened without increasing the communication load between the vehicle control unit and the battery control unit.

  Further, according to the above configuration, it is determined that the vehicle control unit and the battery control unit match immediately after the electric vehicle is started, and when the mismatch is determined, the battery control unit performs control for outputting a warning. To do. As a result, even if the vehicle control unit or the battery unit is replaced without removing the auxiliary battery, which causes a mismatch between the vehicle control unit and the battery control unit, the inconsistency can be reliably detected. Then, it is possible to notify the user including the service person or the driver.

  According to the present invention, it is possible to reliably detect a mismatch between the vehicle control unit and the battery control unit while reducing the startup time of the electric vehicle without increasing the communication load between the vehicle control unit and the battery control unit. You can be notified.

It is a schematic diagram of a configuration of a battery system according to the present embodiment. FIG. 9 is a diagram showing an example in which a mismatch between the battery ECU and the HV-ECU occurs while the determination result information indicating that the battery ECU and the HV-ECU match is maintained in the storage unit of the battery ECU. It is a flow chart which shows a flow of processing of a battery system concerning this embodiment.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a schematic configuration diagram of a battery system 10 according to the present embodiment. The battery system 10 is mounted on an electric vehicle such as an electric vehicle or a hybrid vehicle that obtains driving force from a motor generator. In this embodiment, the battery system 10 is mounted on a hybrid vehicle. The battery system 10 includes a vehicle body 12 and a battery unit 14 attached to the vehicle body 12.

  First, the vehicle body 12 will be described. The vehicle body 12 includes an auxiliary battery 20 and an HV (Hybrid Vehicle)-ECU 22 as a vehicle control unit.

  The auxiliary battery 20 is composed of, for example, a lead storage battery. The auxiliary battery 20 supplies electric power to the HV-ECU 22 and a battery ECU 42 (described later) included in the battery unit 14. When the HV-ECU 22 and the battery unit 14 are replaced, the auxiliary battery 20 is usually removed from the vehicle body 12, and the power supply to the HV-ECU 22 and the battery unit 14 is cut off.

  The HV-ECU 22 is composed of, for example, a microcontroller. The HV-ECU 22 controls a motor generator or the like mounted on an electric vehicle according to a program stored in a storage unit 24 described later.

  The HV-ECU 22 has a storage unit 24. The storage unit 24 is composed of, for example, a ROM or a flash memory.

  The storage unit 24 stores HV-ECU side vehicle type information 26 as first vehicle type information indicating a compatible vehicle type of the HV-ECU 22. In this embodiment, a plurality of different compatible vehicle types can be set for the HV-ECU 22 having the same hardware configuration. The setting of the compatible vehicle type of the HV-ECU 22 is performed by setting the control constant of the HV-ECU 22. One HV-ECU 22 may be compatible with a plurality of vehicle types. That is, the battery side vehicle type information 50 may indicate a plurality of vehicle types.

  In addition, the storage unit 24 stores a program for operating the HV-ECU 22 and the like.

  The HV-ECU 22 has a function as a vehicle type information transmission unit 28 that transmits the HV-ECU side vehicle type information 26 to the battery unit 14.

  Before starting the electric vehicle, the vehicle type information transmitting unit 28 transmits the HV-ECU side vehicle type information 26 to the battery unit 14 only when the electric vehicle receives an instruction to start the electric vehicle for the first time after the auxiliary battery 20 is detached. To do. In this specification, the activation of the electric vehicle means the start of charging/discharging of a battery 40 (described later) included in the battery unit 14. The activation instruction for the electric vehicle is transmitted to the HV-ECU 22 and the battery ECU 42 by, for example, the user pressing an ignition switch. Further, the attachment/detachment of the auxiliary battery 20 can be detected by the HV-ECU 22 once the power supply to itself has been cut off.

  The vehicle type information transmission unit 28 transmits the HV-ECU side vehicle type information 26 to the battery unit 14 immediately after each activation of the electric vehicle. For example, the vehicle type information transmission unit 28 may periodically transmit the HV-ECU side vehicle type information 26 to the battery unit 14 immediately after starting the electric vehicle.

  Next, the battery unit 14 will be described. The battery unit 14 includes a battery 40, a battery ECU 42 as a battery control unit, and a fan 44 for cooling the battery 40.

  The battery 40 is a secondary battery and is composed of, for example, a lithium ion battery or a nickel hydrogen battery. The battery 40 supplies electric power to the motor generator mounted on the electric vehicle. Alternatively, the battery 40 is charged with electric power from the motor generator.

  The battery ECU 42 is composed of, for example, a microcontroller. The battery ECU 42 performs charge/discharge control of the battery 40, measurement of the SOC of the battery 40, control of the fan 44, and the like according to a program stored in a storage unit 46 described later.

  The battery ECU 42 has a storage unit 46 as a determination result information storage unit. The storage unit 46 is composed of, for example, a ROM or a flash memory. The storage unit 46 stores determination result information 48, which is information indicating the determination result of the matching determination unit 52 described later.

  The storage unit 46 also stores battery-side vehicle type information 50 as second vehicle type information indicating the compatible vehicle type of the battery ECU 42. In this embodiment, a plurality of different compatible vehicle types can be set for the battery ECU 42 having the same hardware configuration. The compatible vehicle type of the battery ECU 42 is set by setting the control constant of the battery ECU 42. One battery ECU 42 may be adaptable to a plurality of vehicle types. That is, the battery side vehicle type information 50 may indicate a plurality of vehicle types.

  In addition, the storage unit 46 stores a program for operating the battery ECU 42 and the like.

  The battery ECU 42 has a function as the matching determination unit 52. The matching determination unit 52, based on the HV-ECU side vehicle type information 26 transmitted from the HV-ECU 22 and the battery side vehicle type information 50 stored in the storage unit 46, adapts the HV-ECU 22 to the compatible vehicle type and the battery ECU 42. Matching determination processing is performed to determine whether the vehicle type matches. The matching determination unit 52 stores the determination result information 48 indicating the result of the matching determination process in the storage unit 46. In the present embodiment, when the HV-ECU 22 and the battery ECU 42 match, “1” is stored in the storage unit 46 as the determination result information 48, and when they do not match, “0” is stored in the storage unit 46 as the determination result information 48. To be done. When the auxiliary battery 20 is removed and the power supply to the battery ECU 42 is cut off, the determination result information 48 is cleared and its value becomes “0”.

  In the present embodiment, the matching determination unit 52 performs the matching determination process at the timing when the HV-ECU 22 transmits the HV-ECU side vehicle type information 26. As described above, the HV-ECU 22 (vehicle type information transmitting unit 28) does not operate the HV-ECU side before the electric vehicle is activated and only when the electric vehicle receives the activation instruction for the first time after the auxiliary battery 20 is detached. Since the vehicle type information 26 is transmitted, the matching determination unit 52 performs the above matching determination processing only before the electric vehicle receives the start instruction after the auxiliary battery 20 is attached/detached before the electric vehicle is started. .. Further, since the HV-ECU 22 (vehicle type information transmitting unit 28) transmits the HV-ECU side vehicle type information 26 immediately after each activation of the electric vehicle, the matching determination unit 52 performs the above immediately after each activation of the electric vehicle. Performs matching determination processing.

  The battery ECU 42 has a function as the fan control unit 54. The fan control unit 54 controls the fan 44. Specifically, the start/stop control of the fan 44, the rotation speed control, or the like is performed. As will be described later, the fan control unit 54 performs control for outputting a warning when a mismatch between the HV-ECU 22 and the battery ECU 42 is determined after starting the electric vehicle.

  When the battery ECU 42 receives the instruction to start the electric vehicle for the first time after the auxiliary battery 20 is detached, the battery ECU 42 refers to the judgment result information 48 after the matching judgment unit 52 performs the matching judgment processing, and judges the judgment result information. When 48 is “1”, charging/discharging of the battery 40 is started. That is, the electric vehicle is activated. When the second or later instruction to start the electric vehicle is received after the auxiliary battery 20 is detached, the battery ECU 42 reads the determination result information 48 obtained by the above-described matching determination processing, and the determination result information 48 is “ If it is "1", charging/discharging of the battery 40 is started. As a result, when the second or later instruction to start the electric vehicle is received after the auxiliary battery 20 is detached, it is not necessary to communicate between the HV-ECU 22 and the battery ECU 42 to perform the matching determination process. Therefore, the startup time of the electric vehicle can be shortened without increasing the communication load between the vehicle control unit and the battery control unit.

  In the battery system 10, before starting the electric vehicle, the matching determination process is performed only when the instruction to start the electric vehicle is received for the first time after the auxiliary battery 20 is attached/detached. Therefore, the HV-ECU 22 and the battery ECU 42 do not operate properly. There may be cases where a match cannot be detected. An example thereof will be described with reference to FIG.

  For example, as shown in FIG. 2A, consider a case where an HV-ECU 22 of a compatible vehicle type A and a battery ECU 42 of a compatible vehicle type A are attached to an electric vehicle of a vehicle type A. At this time, since the compatible vehicle types of the HV-ECU 22 and the battery ECU 42 are both A, the matching determination unit 52 determines that the HV-ECU 22 and the battery ECU 42 match, and stores “1” as the determination result information 48. It is stored in the unit 46. After that, when the HV-ECU 22 is replaced without removing the auxiliary battery 20, and the HV-ECU 22 having the compatible vehicle type B is attached as shown in FIG. 2B, the HV-ECU 22 and the battery ECU 42 are Despite the mismatch, “1” is maintained in the determination result information 48 in the battery ECU 42. When the electric vehicle receives a start instruction in this state, battery ECU 42 refers to determination result information 48 “1” to start charging/discharging of battery 40.

  In the present embodiment, the match determination unit 52 performs the match determination process immediately after each startup of the electric vehicle so that the mismatch between the HV-ECU 22 and the battery ECU 42 can be detected in such a case. Then, if a mismatch between the HV-ECU 22 and the battery ECU 42 is detected after the electric vehicle is started, the HV-ECU 22 performs control for issuing a warning to notify the user of the mismatch.

  In this embodiment, as the warning, the fan control unit 54 rotates the fan 44 at the maximum rotation speed. As a result, the user is made aware of the mismatch between the HV-ECU 22 and the battery ECU 42. Alternatively, the fan control unit 54 may rotate the fan 44 such that the maximum rotation speed and the minimum rotation speed are alternately repeated as the warning.

  Further, the warning method may not be performed by the fan 44. For example, the battery ECU 42 operates the measured value of the SOC of the battery 40 to set it to SOC=0%, for example, and displays it on the display unit of the electric vehicle to make the user notice the mismatch between the HV-ECU 22 and the battery ECU 42. You may. Alternatively, by limiting the upper limit of the charge/discharge amount of battery 40 to a low value, the performance of the electric vehicle may be limited so that the user may notice the mismatch between HV-ECU 22 and battery ECU 42.

  As described above, in the present embodiment, the match determination unit 52 performs the match determination process immediately after each startup of the electric vehicle, and when a mismatch between the HV-ECU 22 and the battery ECU 42 is detected, the match determination process is performed. A warning for notifying the user is output. As a result, even if the vehicle start-up time is reduced by not performing the above-described matching determination process when the second or subsequent instruction to start the electric-powered vehicle is received after the auxiliary battery 20 is detached and attached, the HV -A mismatch between the ECU 22 and the battery ECU 42 can be reliably detected and notified to the user.

  The schematic configuration of the battery system 10 according to the present embodiment is as described above. In battery system 10, HV-ECU 22 detects attachment/detachment of auxiliary battery 20, but battery ECU 42 may detect attachment/detachment of auxiliary battery 20. Also in this case, the attachment/detachment of the auxiliary battery 20 can be detected by the battery ECU 42 once the power supply to itself is cut off. When battery ECU 42 detects attachment/detachment of auxiliary battery 20, match determination unit 52 causes HV-ECU 22 to HV-ECU 22 when the electric vehicle receives a start instruction for the first time after attachment/detachment of auxiliary battery 20. The transmission request of the side vehicle type information 26 is transmitted, and the vehicle type information transmission unit 28 transmits the HV-ECU side vehicle type information 26 to the battery unit 14 by receiving the transmission request as a trigger.

  Further, in the present embodiment, the battery ECU 42 has the function of the matching determination unit 52, but instead of this, the HV-ECU 22 may have the function of the matching determination unit 52. In this case, the battery-side vehicle type information 50 is transmitted from the battery ECU 42 to the HV-ECU 22, and then the HV-ECU 22 performs the matching determination process. Even in this case, the determination result information 48 is stored in the storage unit 46 of the battery ECU 42.

  The process flow of the battery system 10 will be described below with reference to the flowchart shown in FIG.

  Upon receiving the start instruction of the electric vehicle, in step S10, HV-ECU 22 determines whether the present start instruction is the first start instruction after attachment/detachment of auxiliary battery 20. If the present activation instruction is the first activation instruction after the attachment/detachment of the auxiliary battery 20, the process proceeds to step S12.

  In step S12, the vehicle type information transmission unit 28 transmits the HV-ECU side vehicle type information 26 stored in the storage unit 24 to the battery ECU 42.

  In step S14, the matching determination unit 52 collates the HV-ECU side vehicle type information 26 transmitted in step S12 with the battery side vehicle type information 50 stored in the storage unit 46 to match the HV-ECU 22 and the battery ECU 42. Matching determination processing for determining is performed. Then, the determination result information 48 that is the result of the matching determination process is written in the storage unit 46.

  If it is determined in step S10 that the current activation instruction is not the first activation instruction after the attachment/detachment of the auxiliary battery 20, or if the matching determination processing ends in step S14, the battery ECU 42 determines in step S16 that the determination result information Refer to the contents of 48.

  When the content of the determination result information 48 is "1", that is, when the HV-ECU 22 and the battery ECU 42 match, the process proceeds to step S18, and the battery ECU 42 starts charging/discharging the battery 40 in step S18. To do. That is, the electric vehicle is started.

  When the content of the determination result information 48 is “0”, that is, when the HV-ECU 22 and the battery ECU 42 are inconsistent, the HV-ECU 22 does not start charging/discharging the battery 40 and ends the process.

  After the electric vehicle is started in step S18, the vehicle type information transmission unit 28 again transmits the HV-ECU side vehicle type information 26 to the battery ECU 42 in step S20.

  In step S22, the matching determination unit 52 collates the HV-ECU side vehicle type information 26 transmitted in step S20 with the battery side vehicle type information 50 stored in the storage unit 46 to match the HV-ECU 22 and the battery ECU 42. The matching determination process for determining is performed again. Note that the determination result information 48 that is the result of the matching determination process may be written in the storage unit 46 also in step S22.

  When a mismatch between the HV-ECU 22 and the battery ECU 42 is detected as a result of the matching determination process in step S22, the battery ECU 42 outputs a warning for notifying the user of the mismatch in step S24. As described above, in this embodiment, the fan 44 is rotated at the maximum rotation speed.

  If the HV-ECU 22 and the battery ECU 42 match as a result of the matching determination process in step S22, the process ends without outputting a warning.

  Although the embodiments according to the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention.

  10 battery system, 12 vehicle body, 14 battery unit, 20 auxiliary battery, 22 HV-ECU, 24, 46 storage unit, 26 HV-ECU side vehicle type information, 28 vehicle type information transmitting unit, 40 battery, 42 battery ECU, 44 Fan, 48 determination result information, 50 battery side vehicle type information, 52 matching determination unit.

Claims (1)

A vehicle controller provided in a vehicle body of the electric vehicle, the vehicle controller having first vehicle type information indicating a compatible vehicle type of the vehicle controller,
A battery control unit attached to the vehicle body and provided in a battery unit including a secondary battery, the battery control unit having second vehicle type information indicating a compatible vehicle type of the battery control unit;
An auxiliary battery that supplies electric power to the vehicle control unit and the battery control unit,
Equipped with
Matching that is provided in either the vehicle control unit or the battery control unit and determines whether the vehicle model information indicating the model of the electric vehicle, the first vehicle model information, and the second vehicle model information are consistent A matching determination unit that performs determination processing, and before the charge/discharge of the secondary battery is started by an instruction from the user, the charge/discharge start instruction of the secondary battery is issued from the user only after the auxiliary battery is attached/detached. And a matching determination unit that performs the matching determination process immediately after each charging/discharging start of the secondary battery according to an instruction from the user ,
A determination result information storage unit that is provided in the battery control unit and stores determination result information indicating the determination result of the matching determination unit;
Have
The battery control unit is configured to indicate that the determination result the determination result information stored in the information storage unit and the vehicle model information and the first vehicle type information with the second vehicle type information are matched two Control for outputting a warning when it is determined that the vehicle model information, the first vehicle model information, and the second vehicle model information do not match after starting the charging/discharging of the secondary battery and starting the electric vehicle Do,
A battery system characterized by the above.

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