JP2017189032A - Battery system - Google Patents

Abstract

An object of the present invention is to reliably detect and notify a mismatch between a vehicle control unit and a battery control unit while reducing a startup time of an electric vehicle without increasing a communication load between the vehicle control unit and the battery control unit. An alignment determination unit 52 determines alignment between an HV-ECU 22 and a battery ECU 42 only when the electric vehicle receives a start instruction for the first time after the auxiliary battery 20 is detached before the start of the electric vehicle. To do. Determination result information 48 indicating the result of the alignment determination process is stored in the storage unit 46 of the battery ECU 42. When receiving an instruction for starting the electric vehicle after the next time, the battery ECU 42 starts the electric vehicle based on the determination result information 48. Moreover, the matching determination part 52 performs a matching determination process immediately after every starting of an electric vehicle. When inconsistency is detected by the alignment determination process after activation of the electric vehicle, the battery ECU 42 outputs a warning for notifying the user of the inconsistency. [Selection] Figure 1

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 performs control of the battery or measurement of SOC (State of Charge) of the battery.

  A compatible vehicle type is determined for the battery unit, and the battery unit needs to be attached to an appropriate vehicle type according to the compatible vehicle type. Specifically, a compatible vehicle type is defined in the battery control unit included in the battery unit, and a compatible vehicle type of the battery control unit and a compatible vehicle type of the vehicle control unit provided in the vehicle main body and controlling the HEV / EV system, Need to 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, there may arise a problem that the battery ECU cannot operate correctly.

  Conventionally, techniques for detecting inconsistencies between a vehicle control unit and a battery control unit have been proposed. For example, in Patent Document 1, when an electric vehicle receives a start instruction, between a controller (vehicle control unit) provided in the vehicle body and a voltage monitoring unit (battery control unit) provided in the battery unit. A technique is disclosed in which the identification information included in the controller and the identification information included in the voltage monitoring unit are collated to start the electric vehicle when the two match.

JP 2014-50175 A

  As in the past, each time the electric vehicle is started (battery charging / discharging starts), communication is performed between the vehicle control unit and the battery control unit, and a matching determination process is performed to determine 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, resulting in an increase in the cost of the communication path between the vehicle control unit and the battery control unit. Therefore, in view of the fact that the battery unit is normally attached / detached with the auxiliary battery removed, the inventor of the present application described above only when the electric vehicle receives a start instruction for the first time after the auxiliary battery is removed. I devised a decision process.

  However, in the case where the alignment determination process is performed only when the electric vehicle receives a start instruction for the first time after the auxiliary battery is detached, there may be a case where an inconsistency between the vehicle control unit and the battery control unit cannot be detected. For example, when the vehicle control unit is replaced without removing the auxiliary battery, if the vehicle control unit and the battery control unit are inconsistent due to the replacement of the vehicle control unit, it cannot be detected.

  An object of the present invention is to reliably detect inconsistencies 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. It is to notify.

  A battery system according to the present invention is a vehicle control unit provided in a vehicle main 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 attached to the vehicle main body. A battery control unit provided in the battery unit, the battery control unit having second vehicle type information indicating a compatible vehicle type of the battery control unit, and an auxiliary battery that supplies power to the vehicle control unit and the battery control unit And is provided in any one of the vehicle control unit and the battery control unit, and performs a consistency determination process for performing a consistency determination process for determining whether or not the first vehicle type information and the second vehicle type information match. Before starting the electric vehicle, the alignment determination process is performed only when the electric vehicle receives a start instruction for the first time after the auxiliary battery is detached. Further, a matching determination unit that performs the matching determination process immediately after each activation of the electric vehicle, 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 when the determination result information stored in the determination result information storage unit indicates that the first vehicle type information and the second vehicle type information are consistent with each other, An electric vehicle is activated, and control is performed to output a warning when it is determined that the first vehicle type information and the second vehicle type information do not match after the electric vehicle is activated.

  According to the above configuration, the alignment determination process that determines the alignment between the vehicle control unit and the battery control unit only when the electric vehicle receives an activation instruction for the first time after the auxiliary battery is detached and attached before the activation of the electric vehicle. The determination result information indicating the result is stored in a determination result information storage unit provided in the battery control unit. Thereby, as long as the auxiliary battery is not attached or detached, when the second and subsequent activation instructions are received, the battery control unit determines that the first vehicle type information and the second vehicle type information are consistent. The electric vehicle can be activated based on the information. That is, when an activation instruction is received for the second and subsequent times after the auxiliary battery is detached, the vehicle control unit and the battery control unit communicate with each other to perform the alignment determination process every time the electric vehicle is activated. Since it is not necessary, the startup time of the electric vehicle is shortened without increasing the communication load between the vehicle control unit and the battery control unit.

  Further, according to the above configuration, when the matching between the vehicle control unit and the battery control unit is determined immediately after the start of the electric vehicle, and the mismatch between the two is determined, the battery control unit performs control for outputting a warning. Do. As a result, for example, even when the vehicle control unit or the battery unit is replaced without removing the auxiliary battery, thereby causing a mismatch between the vehicle control unit and the battery control unit, the mismatch is reliably detected. Thus, it is possible to notify a service person or a user including a driver.

  According to the present invention, it is possible to reliably detect the 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.

1 is a schematic configuration diagram of a battery system according to an embodiment. It is a figure which shows the example in which inconsistency of battery ECU and HV-ECU arises, while the determination result information which shows that battery ECU and HV-ECU are matched is maintained in the memory | storage part of battery ECU. It is a flowchart which shows the flow of a process of the battery system which concerns on this embodiment.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the 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 a driving force by a motor generator. In the present embodiment, the battery system 10 is mounted on a hybrid vehicle. The battery system 10 includes a vehicle main body 12 and a battery unit 14 attached to the vehicle main 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 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 normally removed from the vehicle body 12 and the power supply to the HV-ECU 22 and the battery unit 14 is shut off.

  The HV-ECU 22 is constituted by a microcontroller, for example. The HV-ECU 22 controls a motor generator and the like mounted on the 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 the present embodiment, different compatible vehicle types can be set for the HV-ECU 22 having the same hardware configuration. Setting of the compatible vehicle type of the HV-ECU 22 is performed by setting a control constant of the HV-ECU 22. One HV-ECU 22 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 24 stores a program for operating the HV-ECU 22.

  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.

  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 a start instruction for the first time after the auxiliary battery 20 is detached before the start of the electric vehicle. To do. In this specification, the start 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, for example, when the user presses an ignition switch. Further, the attachment / detachment of the auxiliary battery 20 can be detected when the power supply to the HV-ECU 22 is cut off once.

  The vehicle type information transmission unit 28 transmits the HV-ECU-side vehicle type information 26 to the battery unit 14 immediately after the 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 the start of 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, for example, a lithium ion battery or a nickel metal hydride battery. The battery 40 supplies electric power to a motor generator mounted on the electric vehicle. Alternatively, the battery 40 is supplied with power from the motor generator and charged.

  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 that is information indicating a determination result of a later-described matching determination unit 52.

  Further, the storage unit 46 stores battery-side vehicle type information 50 as second vehicle type information indicating the compatible vehicle type of the battery ECU 42. In the present embodiment, different compatible vehicle types may 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 a control constant of the battery ECU 42. One battery ECU 42 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 46 stores a program for operating the battery ECU 42.

  The battery ECU 42 has a function as the alignment 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, the matching determination unit 52 matches the compatible vehicle type of the HV-ECU 22 and the battery ECU 42. An alignment determination process is performed to determine whether the vehicle type is consistent. The matching determination unit 52 causes the storage unit 46 to store determination result information 48 indicating the result of the matching determination process. 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 “0” is stored in the storage unit 46 as the determination result information 48 when they do not match. Is done. When auxiliary battery 20 is removed and power supply to battery ECU 42 is interrupted, determination result information 48 is cleared and its value becomes “0”.

  In the present embodiment, the alignment determination unit 52 performs the alignment determination process at the timing when the HV-ECU side vehicle type information 26 is transmitted from the HV-ECU 22. As described above, the HV-ECU 22 (vehicle type information transmission unit 28) is the HV-ECU side only when the electric vehicle receives a start instruction for the first time after the auxiliary battery 20 is detached before the start of the electric vehicle. Since the vehicle type information 26 is transmitted, the alignment determination unit 52 performs the alignment determination process only when the electric vehicle receives an activation instruction for the first time after the auxiliary battery 20 is detached before the activation of the electric vehicle. . 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 immediately after each activation of the electric vehicle. Perform consistency judgment processing.

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

  When the battery ECU 42 receives an activation instruction for the electric vehicle for the first time after the auxiliary battery 20 is detached, the battery ECU 42 refers to the determination result information 48 after the alignment determination unit 52 performs the alignment determination process, and determines the determination result information. When 48 is “1”, charging / discharging of the battery 40 is started. That is, the electric vehicle is activated. When receiving an instruction to start the electric vehicle for the second and subsequent times after the auxiliary battery 20 is detached, the battery ECU 42 reads out the determination result information 48 obtained by the alignment determination process, and the determination result information 48 is “ When it is “1”, charging / discharging of the battery 40 is started. As a result, when the activation instruction for the second or subsequent electric vehicle is received after the auxiliary battery 20 is detached, it is not necessary to perform the alignment determination process by communicating between the HV-ECU 22 and the battery ECU 42. Thus, the start-up time of the electric vehicle is shortened without increasing the communication load between the vehicle control unit and the battery control unit.

  In the battery system 10, before the start of the electric vehicle, the alignment determination process is performed only when the start instruction of the electric vehicle is received for the first time after the auxiliary battery 20 is detached, so that the HV-ECU 22 and the battery ECU 42 are not connected. 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 with a compatible vehicle type A and a battery ECU 42 with a compatible vehicle type A are attached to an electric vehicle with a vehicle type A. At this time, since the compatible models of the HV-ECU 22 and the battery ECU 42 are both A, the alignment determination unit 52 determines that the HV-ECU 22 and the battery ECU 42 are aligned, and stores “1” as the determination result information 48. Store in the unit 46. Thereafter, the HV-ECU 22 is replaced without removing the auxiliary battery 20, and as shown in FIG. 2 (b), when the HV-ECU 22 with the compatible vehicle type B is attached, the HV-ECU 22 and the battery ECU 42 are In spite of the mismatch, “1” is maintained in the determination result information 48 in the battery ECU 42. When the electric vehicle receives an activation instruction in this state, the battery ECU 42 starts charging / discharging the battery 40 with reference to “1” that is the determination result information 48.

  In the present embodiment, the alignment determination unit 52 performs the alignment determination process immediately after each activation of the electric vehicle so that inconsistency between the HV-ECU 22 and the battery ECU 42 can be detected in such a case. When an inconsistency between the HV-ECU 22 and the battery ECU 42 is detected after the electric vehicle is activated, the HV-ECU 22 performs control for giving a warning for notifying the user of the inconsistency.

  In the present embodiment, as the warning, the fan control unit 54 rotates the fan 44 at the maximum rotation speed. Thereby, 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 so that the maximum rotation speed and the minimum rotation speed are alternately repeated as the warning.

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

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

  The outline of the configuration of the battery system 10 according to the present embodiment is as described above. In the battery system 10, the HV-ECU 22 detects the detachment of the auxiliary battery 20, but the battery ECU 42 may detect the detachment of the 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 the battery ECU 42 detects the attachment / detachment of the auxiliary battery 20, the alignment determination unit 52 instructs the HV-ECU 22 to send the HV-ECU 22 to the HV-ECU 22 when the electric vehicle receives an activation instruction for the first time after the auxiliary battery 20 is attached / detached. The transmission request for 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 using the reception of the transmission request as a trigger.

  In the present embodiment, the battery ECU 42 has the function of the matching determination unit 52, but instead, 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 alignment determination process is performed in the HV-ECU 22. Even in this case, the determination result information 48 is stored in the storage unit 46 of the battery ECU 42.

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

  When receiving the start instruction of the electric vehicle, in step S10, the HV-ECU 22 determines whether or not the current start instruction is the first start instruction after the auxiliary battery 20 is detached. If the current activation instruction is the first activation instruction after the auxiliary battery 20 is detached, the process proceeds to step S12.

  In step S <b> 12, 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 S <b> 14, the matching determination unit 52 collates the HV-ECU side vehicle type information 26 transmitted in step S <b> 12 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 consistency determination process for determining Then, determination result information 48 that is a result of the matching determination processing 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 auxiliary battery 20 is attached or detached, or if the alignment determination process is completed in step S14, the battery ECU 42 determines the determination result information in step S16. The contents of 48 are referred to.

  When the content of the determination result information 48 is “1”, that is, indicating that the HV-ECU 22 and the battery ECU 42 are matched, the process proceeds to step S18. In step S18, the battery ECU 42 starts charging / discharging of the battery 40. To do. That is, the electric vehicle is activated.

  If the content of the determination result information 48 is “0”, that is, indicates that 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 activated in step S18, the vehicle type information transmission unit 28 transmits the HV-ECU side vehicle type information 26 to the battery ECU 42 again in step S20.

  In step S22, the alignment 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, thereby matching the HV-ECU 22 and the battery ECU 42. The matching determination process for determining In step S22, determination result information 48, which is a result of the matching determination process, may be written in the storage unit 46.

  If 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 the present embodiment, the fan 44 is rotated at the maximum rotation speed.

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

  As mentioned above, although embodiment which concerns on this invention was described, this invention is not limited to the said embodiment, A various change is possible unless it deviates from the meaning of this invention.

  DESCRIPTION OF SYMBOLS 10 Battery system, 12 Vehicle main body, 14 Battery unit, 20 Auxiliary battery, 22 HV-ECU, 24,46 Memory | storage part, 26 HV-ECU side vehicle type information, 28 Vehicle type information transmission part, 40 Battery, 42 Battery ECU, 44 Fan, 48 determination result information, 50 battery side vehicle type information, 52 consistency determination unit.

Claims (1)

A vehicle control unit provided in a vehicle body of the electric vehicle, the vehicle control unit having first vehicle type information indicating a compatible vehicle type of the vehicle control unit;
A battery control unit provided in a battery unit attached to the vehicle body, the battery control unit having second vehicle type information indicating a compatible vehicle type of the battery control unit;
An auxiliary battery that supplies power to the vehicle control unit and the battery control unit;
With
A matching determination unit that is provided in any one of the vehicle control unit and the battery control unit and performs a matching determination process for determining whether or not the first vehicle type information and the second vehicle type information match; Before starting the electric vehicle, the alignment determination process is performed only when the electric vehicle receives an activation instruction for the first time after the auxiliary battery is detached, and the alignment is performed immediately after each activation of the electric vehicle. A consistency determination unit that performs a determination process;
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;
Have
The battery control unit activates the electric vehicle when the determination result information stored in the determination result information storage unit indicates that the first vehicle type information and the second vehicle type information match, Performing control for outputting a warning when it is determined that the first vehicle type information and the second vehicle type information are not consistent after the electric vehicle is started,
A battery system characterized by that.

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