Control methods, devices, storage media, and vehicles for vehicle power batteries

Abstract

This invention discloses a control method, device, storage medium, and vehicle for a vehicle's power battery. The method includes: determining the operating mode of the vehicle's battery management system; in response to the operating mode being a first operating mode, acquiring the operating states of both the vehicle's actuators and the vehicle's drive circuit, wherein the first operating mode indicates that the battery management system has completed initialization; in response to the operating state being a fault state, controlling the actuators and / or the drive circuit to obtain a control result, and sending the vehicle's fault information corresponding to the fault state to the vehicle for display. This invention solves the technical problem of not being able to effectively disconnect the power battery under different conditions.

Description

Technical Field

[0001] This invention relates to the field of vehicles, and more specifically, to a method, apparatus, storage medium, and vehicle for controlling a power battery in a vehicle. Background Technology

[0002] Currently, in the functional safety development of power battery management systems, the common approach is to directly disconnect the high-voltage relay by diagnosing whether the contact status of the high-voltage contactor is normal. However, this approach uses only a single shutdown device, and the device's diagnostic mechanism is relatively simple. The hardware's random failure rate and diagnostic coverage are also difficult to meet the functional safety requirements of independent shutdown in power battery management systems, resulting in technical problems such as the inability to effectively disconnect the power battery under different circumstances.

[0003] There is currently no effective solution to the technical problem of the inability to effectively disconnect the power battery under different circumstances. Summary of the Invention

[0004] This invention provides a method, apparatus, storage medium, and vehicle for controlling a vehicle's power battery, to at least solve the technical problem of not being able to effectively disconnect the power battery under different circumstances.

[0005] According to one aspect of the present invention, a control method for a vehicle's power battery is provided. The method may include: determining an operating mode of the vehicle's battery management system; in response to the operating mode being a first operating mode, acquiring the operating states of both the vehicle's actuators and the vehicle's drive circuit, wherein the first operating mode is used to characterize that the battery management system has completed initialization; in response to the operating state being a fault state, controlling the actuators and / or the drive circuit to obtain a control result, and sending fault information of the vehicle corresponding to the fault state to the vehicle for display.

[0006] Optionally, after determining the operating mode of the vehicle's battery management system, the control method for the vehicle's power battery further includes: in response to the operating mode being a second operating mode, detecting the state of the vehicle's high-voltage contactor contacts and the vehicle's high-voltage contactor coil to obtain a detection result, wherein the second operating mode is used to characterize the battery management system being in the initialization phase; in response to the detection result indicating that the state of the high-voltage contactor contacts is in a fault state, controlling the high-voltage contactor contacts and sending fault information to the vehicle for display; and / or, in response to the detection result indicating that the state of the high-voltage contactor coil is in a fault state, controlling the high-voltage contactor coil and sending fault information to the vehicle for display.

[0007] Optionally, in response to a fault state in the operating state, the actuator and / or drive circuit are controlled to obtain a control result, and the vehicle fault information corresponding to the fault state is sent to the vehicle for display, including: in response to the power battery being in a charging gun disconnected mode and the power battery being in a high-voltage connected state, a shutdown command is sent using the vehicle's control module; in response to the vehicle's smart fuse drive module receiving the shutdown command, the smart fuse is shut off, and the vehicle's main positive contactor and main negative contactor are shut off.

[0008] Optionally, the control method for the vehicle's power battery further includes: in response to the power battery being in a charging gun-disconnected mode and the power battery not being in a high-voltage connection state, sending a shutdown command using the vehicle's control module; and in response to the vehicle's smart fuse drive module receiving the shutdown command, shutting off the smart fuse.

[0009] Optionally, the control method for the vehicle's power battery further includes: in response to the power battery not being in the charging gun disconnected mode and the power battery being in DC charging mode, sending a shutdown command using the control module; in response to the smart fuse drive module receiving the shutdown command, shutting off the smart fuse, and shutting off the vehicle's charging positive contactor, charging negative contactor, main positive contactor, and main negative contactor.

[0010] Optionally, the control method for the vehicle's power battery further includes: in response to the power battery not being in a charging gun disconnected mode and the power battery not being in a DC charging mode, sending a shutdown command using the control module; in response to the smart fuse drive module receiving the shutdown command, shutting off the smart fuse and shutting off the vehicle's main positive contactor and main negative contactor.

[0011] According to one aspect of the present invention, a control device for a vehicle's power battery is provided. The device may include: a determining unit for determining an operating mode of the vehicle's battery management system; a first response unit for acquiring the operating states of both the vehicle's actuators and the vehicle's drive circuit in response to the operating mode being a first operating mode, wherein the first operating mode indicates that the battery management system has completed initialization; and a second response unit for controlling the actuators and / or the drive circuit in response to a fault state, obtaining a control result, and sending fault information corresponding to the fault state to the vehicle for display.

[0012] According to another aspect of the present invention, a computer-readable storage medium is also provided. The computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the device where the computer-readable storage medium is located to perform the control method for a vehicle's power battery according to the embodiments of the present invention.

[0013] According to another aspect of the present invention, a processor is also provided. The processor is used to run a program, wherein the program, when run by the processor, executes the control method for the power battery of a vehicle according to the embodiments of the present invention.

[0014] According to another aspect of the present invention, a vehicle is also provided, which is used to execute the control method of the power battery of the vehicle according to the embodiments of the present invention.

[0015] In this embodiment of the invention, the working mode of the vehicle's battery management system is determined, and the determined working mode is judged. If the working mode is the first working mode, the working status of both the vehicle's actuators and the vehicle's drive circuit is obtained. The obtained working status is judged. If the working status is a fault state, the actuators and / or drive circuit are controlled to obtain the control result. The vehicle's fault information corresponding to the fault state is sent to the vehicle for display, thereby achieving the purpose of ensuring the validity of the actuator status. This solves the technical problem of not being able to effectively disconnect the power battery under different conditions and achieves the technical effect of effectively disconnecting the power battery under different conditions. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1 This is a flowchart of a control method for a vehicle's power battery according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of a battery power shutdown monitoring device with functional safety according to an embodiment of the present invention;

[0019] Figure 3 This is a flowchart of a battery power independent shutdown method according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of a control device for a vehicle's power battery according to an embodiment of the present invention. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] Example 1

[0024] According to an embodiment of the present invention, a method for controlling a power battery of a vehicle is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0025] Figure 1 This is a flowchart of a control method for a vehicle's power battery according to an embodiment of the present invention. The method may include the following steps:

[0026] Step S101: Determine the operating mode of the vehicle's battery management system.

[0027] In the technical solution provided by step S101 of the present invention, the working mode of the battery management system of the vehicle can be used to indicate whether the battery management system has completed initialization.

[0028] Optionally, the operating mode can be either the battery management system in the power-on initialization phase or the battery management system having completed power-on initialization.

[0029] In step S102, in response to the first working mode, the working status of both the vehicle's actuators and the vehicle's drive circuit is obtained.

[0030] In the technical solution provided by step S102 of the present invention, the first working mode can be used to characterize that the battery management system has been initialized. The execution device may include, but is not limited to: high voltage contactor coil, high voltage contactor contact, high voltage contactor, smart fuse driver chip and smart fuse, etc. The drive circuit can be a circuit that provides power to the vehicle's internal power supply module.

[0031] Optionally, after determining the operating mode of the vehicle's battery management system, in response to the operating mode being the first operating mode, the operating states of both the vehicle's actuators and the vehicle's drive circuit are obtained. For example, it is determined whether the determined operating mode is the first operating mode. If the operating mode is the first operating mode, that is, if the operating mode indicates that the battery management system has been initialized, then the operating states of both the actuators and the drive circuit can be obtained through the vehicle's control module. If the operating mode is not the first operating mode, that is, if the operating mode indicates that the battery management system has not been initialized, then it is not necessary to obtain the operating states of both the actuators and the drive circuit through the vehicle's control module. This is only an example and is not specifically limited.

[0032] In step S103, in response to the working state being a fault state, the actuator and / or drive circuit are controlled to obtain the control result, and the fault information of the vehicle corresponding to the fault state is sent to the vehicle for display.

[0033] In the technical solution provided by step S103 of the present invention, the above-mentioned working state may include: normal state and fault state, and the above-mentioned fault information may be sent to the vehicle's instrument panel.

[0034] Optionally, after obtaining the operating status of both the vehicle's actuators and drive circuit in response to the first operating mode, and in response to a fault state, the actuators and / or drive circuit are controlled to obtain a control result. The vehicle's fault information corresponding to the fault state is then sent to the vehicle for display. For example, it is determined whether the operating status is a fault state. If the operating status is a fault state, fault detection and diagnosis are performed on the actuators and / or drive circuit to determine the device and / or location of the fault. Based on the device and / or location of the fault, fault control is performed on the actuators and / or drive circuit, and the vehicle's fault information corresponding to the fault state is sent to the vehicle's instrument panel for display, thereby alerting the user in the vehicle that a vehicle fault has occurred. This is only an example and is not specifically limited.

[0035] Optionally, after sending the fault information to the vehicle's instrument panel for display, an alarm can also be used to alert the user in the vehicle that a fault has occurred.

[0036] In steps S101 to S103 of this application, the working mode of the vehicle's battery management system is determined. If the determined working mode is the first working mode, the working status of both the vehicle's actuators and the vehicle's drive circuit is obtained. The obtained working status is then judged. If the working status is a fault state, the actuators and / or drive circuit are controlled to obtain the control result. The vehicle's fault information corresponding to the fault state is sent to the vehicle for display. This achieves the purpose of ensuring the validity of the actuator status, thereby solving the technical problem of not being able to effectively disconnect the power battery under different conditions and realizing the technical effect of effectively disconnecting the power battery under different conditions.

[0037] The method described in this embodiment will be further described below.

[0038] As an optional embodiment, after determining the operating mode of the vehicle's battery management system in step S101, the control method for the vehicle's power battery further includes: in response to the operating mode being a second operating mode, detecting the state of the vehicle's high-voltage contactor contacts and the vehicle's high-voltage contactor coil to obtain a detection result; in response to the detection result indicating that the state of the high-voltage contactor contacts is in a fault state, controlling the high-voltage contactor contacts and sending fault information to the vehicle for display; and / or, in response to the detection result indicating that the state of the high-voltage contactor coil is in a fault state, controlling the high-voltage contactor coil and sending fault information to the vehicle for display.

[0039] In this embodiment, the second operating mode described above can be used to characterize that the battery management system is in the initialization phase, and the detection results described above can be used to characterize whether the state of the high-voltage contactor contacts and / or the state of the high-voltage contactor coil are in a fault state.

[0040] Optionally, after determining the operating mode of the vehicle's battery management system, it is determined whether the operating mode is the second operating mode. If the operating mode is the second operating mode, the state of the high-voltage contactor contacts and the state of the high-voltage contactor coil are detected to obtain the detection results. That is, it is determined whether the state of the high-voltage contactor contacts and / or the state of the high-voltage contactor coil is in a fault state. If the state of the high-voltage contactor contacts is in a fault state, the high-voltage contactor contacts are controlled, and the fault information corresponding to the fault state of the high-voltage contactor contacts is sent to the vehicle's instrument panel for display, thereby reminding the user in the vehicle that the high-voltage contactor contacts have failed. If the state of the high-voltage contactor coil is in a fault state, the high-voltage contactor coil is controlled, and the fault information corresponding to the fault state of the high-voltage contactor coil is sent to the vehicle's instrument panel for display, thereby reminding the user in the vehicle that the high-voltage contactor coil has failed.

[0041] As an optional embodiment, step S103, in response to a fault state, controls the actuator and / or drive circuit to obtain a control result, and sends the vehicle's fault information corresponding to the fault state to the vehicle for display, including: in response to the power battery being in a charging gun disconnected mode and the power battery being in a high-voltage connected state, sending a shutdown command using the vehicle's control module; in response to the vehicle's smart fuse drive module receiving the shutdown command, shutting off the smart fuse, and shutting off the vehicle's main positive contactor and main negative contactor.

[0042] In this embodiment, the aforementioned shutdown command can be used to shut down the smart fuse.

[0043] Optionally, in response to the first operating mode, after acquiring the operating states of both the vehicle's actuators and the vehicle's drive circuit, if the operating state is a fault state, it is determined whether the power battery is in a charging gun disconnected mode. If the power battery is in a charging gun disconnected mode, it is determined whether the power battery is in a high-voltage connected state. If the power battery is in a high-voltage connected state, the vehicle's control module sends a shutdown command. When the vehicle's smart fuse drive module receives the shutdown command, it can shut down the smart fuse. After a certain period of time after the control module sends the shutdown command, the high-voltage contactor drive module can sequentially disconnect the main positive contactor and the main negative contactor. The aforementioned time can be 0.65ms, 0.5ms, 0.4ms, 0.25ms, 0.19ms, and 0.05ms, etc., which are only examples and are not specifically limited.

[0044] Optionally, when the operating state is faulty, the following fault detections can be performed on the vehicle's actuators and / or drive circuits: fault diagnosis of the circuit providing power to the internal power supply module, ensuring the voltage input to the high-voltage contactor drive circuit and the smart fuse drive circuit is valid, and sending status information to the instrument panel for alarm purposes; fault diagnosis of the high-voltage contactor coil status, ensuring the high-voltage contactor coil status is valid, and sending status information to the instrument panel; fault diagnosis of the high-voltage contactor contact status, ensuring the high-voltage contactor contact status is valid, and sending status information to the instrument panel; detection of the high-voltage contactor lifespan, ensuring the high-voltage contactor lifespan status is valid, and sending status information to the instrument panel; fault diagnosis of the smart fuse drive chip, ensuring the smart fuse drive circuit status is valid, and sending status information to the instrument panel; fault diagnosis of the smart fuse resistance value, ensuring the smart fuse status is valid, and sending status information to the instrument panel for alarm purposes.

[0045] As an optional embodiment, the control method for the vehicle's power battery further includes: in response to the power battery being in a charging gun-disconnected mode and the power battery not being in a high-voltage connection state, sending a shutdown command using the vehicle's control module; and in response to the vehicle's smart fuse drive module receiving the shutdown command, shutting off the smart fuse.

[0046] In this embodiment, after obtaining the working status of both the vehicle's actuators and the vehicle's drive circuit in response to the first working mode, if the working status is faulty, it is determined whether the power battery is in the charging gun disconnected mode. If the power battery is in the charging gun disconnected mode, it is determined whether the power battery is in the high-voltage connected state. If the power battery is not in the high-voltage connected state, a shutdown command is sent using the vehicle's control module. When the vehicle's smart fuse drive module receives the shutdown command, the smart fuse can be shut off through the smart fuse drive module.

[0047] Optionally, when the operating state is faulty, the following fault detections can be performed on the vehicle's actuators and / or drive circuits: fault diagnosis of the circuit providing power to the internal power supply module, ensuring the voltage input to the high-voltage contactor drive circuit and the smart fuse drive circuit is valid, and sending status information to the instrument panel for alarm purposes; fault diagnosis of the high-voltage contactor coil status, ensuring the high-voltage contactor coil status is valid, and sending status information to the instrument panel; fault diagnosis of the high-voltage contactor contact status, ensuring the high-voltage contactor contact status is valid, and sending status information to the instrument panel; detection of the high-voltage contactor lifespan, ensuring the high-voltage contactor lifespan status is valid, and sending status information to the instrument panel; fault diagnosis of the smart fuse drive chip, ensuring the smart fuse drive circuit status is valid, and sending status information to the instrument panel; fault diagnosis of the smart fuse resistance value, ensuring the smart fuse status is valid, and sending status information to the instrument panel for alarm purposes.

[0048] As an optional embodiment, the control method for the vehicle's power battery further includes: in response to the power battery not being in a charging gun disconnected mode and the power battery being in a DC charging mode, sending a shutdown command using a control module; in response to the smart fuse drive module receiving the shutdown command, shutting off the smart fuse, and shutting off the vehicle's charging positive contactor, charging negative contactor, main positive contactor, and main negative contactor.

[0049] In this embodiment, after obtaining the operating status of both the vehicle's actuators and the vehicle's drive circuit in response to the first operating mode, if the operating status is faulty, it is determined whether the power battery is in the charging gun disconnected mode. If the power battery is not in the charging gun disconnected mode, it is determined whether the power battery is in the DC charging mode. If the power battery is in the DC charging mode, the control module sends a shutdown command. When the vehicle's smart fuse drive module receives the shutdown command, it can shut down the smart fuse. After a certain period of time after the control module sends the shutdown command, the high-voltage contactor drive module can shut down the charging positive contactor, charging negative contactor, main positive contactor, and main negative contactor in sequence. The above-mentioned duration can be 100ms, 95ms, 90ms, 85ms, 82ms, and 80ms, etc., which are only examples and are not specifically limited.

[0050] As an optional embodiment, the control method for the vehicle's power battery further includes: in response to the power battery not being in a charging gun disconnected mode and the power battery not being in a DC charging mode, sending a shutdown command using a control module; and in response to the smart fuse drive module receiving the shutdown command, shutting off the smart fuse and shutting off the vehicle's main positive contactor and main negative contactor.

[0051] In this embodiment, after obtaining the operating states of both the vehicle's actuators and the vehicle's drive circuit in response to the first operating mode, if the operating state is faulty, it is determined whether the power battery is in the charging gun disconnected mode. If the power battery is not in the charging gun disconnected mode, it is determined whether the power battery is in the DC charging mode. If the power battery is not in the DC charging mode, a shutdown command is sent by the control module. When the vehicle's smart fuse drive module receives the shutdown command, it can shut down the smart fuse. After a certain period of time after the control module sends the shutdown command, the main positive contactor and the main negative contactor can be shut down sequentially by the high-voltage contactor drive module. The aforementioned time can be 100ms, 95ms, 90ms, 85ms, 82ms, and 80ms, etc., which are only examples and are not specifically limited.

[0052] This embodiment acquires the operating status of the motor control system, determines the operating mode of the vehicle's battery management system, and judges the determined operating mode. If the operating mode is the first operating mode, it acquires the operating status of both the vehicle's actuators and the vehicle's drive circuit. It judges the acquired operating status. If the operating status is a fault state, it controls the actuators and / or drive circuit to obtain the control result, and sends the vehicle's fault information corresponding to the fault state to the vehicle for display. This solves the technical problem of not being able to effectively disconnect the power battery under different conditions and achieves the technical effect of being able to effectively disconnect the power battery under different conditions.

[0053] Example 2

[0054] The technical solutions of the embodiments of the present invention will be illustrated below with reference to preferred embodiments.

[0055] In current functional safety development of power battery management systems, the common approach is to directly disconnect the high-voltage relay by diagnosing the contact status of the high-voltage contactor. However, this method relies on a single shutdown device with a relatively simple diagnostic mechanism. The hardware's random failure rate and diagnostic coverage are insufficient to meet the functional safety requirements of independent shutdown in a power battery management system, leading to the technical problem of ineffective battery disconnection under various conditions. Therefore, a control method for vehicle power batteries is needed to ensure effective battery disconnection under different circumstances.

[0056] In one related technology, a safety monitoring method for the power battery disconnection function of an electric vehicle is disclosed. This method includes: acquiring vehicle state training data, wherein the vehicle state training data includes at least one of the following: high-voltage relay control signal, vehicle speed signal, remaining charge, current, and temperature; performing a classification operation on the vehicle state training data to obtain a classification result, wherein the classification result is used to characterize the vehicle state training data corresponding to different fault types; determining target conditions based on the classification result, wherein the target conditions are used to monitor whether the vehicle functions are operating normally; and monitoring the current state of the vehicle functions based on the target conditions. However, this method only acquires vehicle state training data through a data acquisition device, then inputs the acquired vehicle state training data into a preset classification model for classification calculation to obtain a classification result corresponding to the vehicle state training data, and then determines the target conditions for monitoring whether the vehicle functions are operating normally based on the classification result. Finally, it monitors the current state of different vehicle functions according to different types of target conditions. It cannot add intelligent fuses and drive devices, or add fault diagnosis mechanisms for actuators in the power disconnection path, thus making it difficult to guarantee effective disconnection of the power battery under different conditions.

[0057] However, the present invention proposes a battery power shutdown monitoring device and independent shutdown method with functional safety. By adding an intelligent fuse and driving device and adding a fault diagnosis mechanism for the actuator in the power shutdown path, the device can ensure the validity of the actuator state, solve the technical problem of not being able to effectively disconnect the power battery under different conditions, and achieve the technical effect of effectively disconnecting the power battery under different conditions.

[0058] Figure 2 This is a schematic diagram of a battery power shutdown monitoring device with functional safety according to an embodiment of the present invention, such as... Figure 2 As shown, the battery power shutdown monitoring device may include: a control module 201, a high-voltage contactor drive module 202, a smart fuse drive module 203, an internal power supply module 204, a high-voltage contactor module 205, a power supply module 206, a smart fuse module 207, and an IC module 208. The control module 201 can drive and control the high-voltage contactor drive module 202 and the smart fuse drive module 203. The control module 201 can also perform fault diagnosis of the drive circuit of the internal power supply module 204. The internal power supply module 204 can power the high-voltage contactor drive module 202 and the smart fuse drive module 203. The high-voltage contactor drive module 202 can drive the high-voltage contactor module 205, the power supply module 206 can power the internal power supply module 204, the smart fuse drive module 203 can drive the smart fuse module 207, the high-voltage contactor module 205 can send fault diagnosis results such as coil, contact and lifespan to the control module 201, the smart fuse module 207 can send fault diagnosis results of resistance value to the control module 201, and the control module 201 can feed back the fault status to the integrated circuit (IC) module 208.

[0059] Optionally, the high-voltage contactor module may include a main positive contactor, a main negative contactor, a charging positive contactor, and a charging negative contactor, whose coil can receive electrical signals output from the high-voltage contactor drive module, thereby realizing battery power output and shutdown.

[0060] Optionally, the smart fuse module can receive the shutdown electrical signal output from the smart fuse drive module, form a break, and quickly complete the current interruption, thereby achieving rapid power shutdown.

[0061] Optionally, the power module can be used to provide power input to the internal power supply module, the IC module can be used to receive power battery alarm information from the control module and remind the user, and the control module can be used to detect and diagnose the status of the high-voltage contactor coil, the high-voltage contactor contact, the high-voltage contactor life status, the high-voltage contactor drive module, the smart fuse drive module, the smart fuse fault status, and the internal power supply module, and feed back the fault status to the IC module.

[0062] Optionally, the internal power supply module can be used to convert the voltage provided by the external power supply module into the operating voltage required by the smart fuse drive module and the high-voltage contactor drive module.

[0063] Optionally, the control module can also be used to diagnose faults in the status of actuators and drive circuits in the shutdown path, and transmit fault status information to instruments for alarm reminders.

[0064] Optionally, the control module can also be used to control the high-voltage relay drive module and the smart fuse drive module to disconnect in tandem according to the severity of the power battery fault.

[0065] Optionally, the high-voltage contactor drive module can be used to disconnect the power supply to the high-voltage contactor coil by receiving a shutdown command from the control module, thereby achieving power shutdown.

[0066] Optionally, the intelligent fuse drive module can be used to disconnect the main battery circuit by receiving a shutdown command from the control module, thereby achieving power shutdown.

[0067] Figure 3 This is a flowchart of a battery power independent shutdown method according to an embodiment of the present invention, such as... Figure 3 As shown, the method may include the following steps:

[0068] Step S301: Determine whether the power battery is in the charging gun not connected mode. If the power battery is in the charging gun not connected mode, proceed to step S302: Determine whether the power battery is in the high voltage connected state.

[0069] If the power battery is in a high-voltage connection state, proceed to steps S303, S309 and S310 to cut off the smart fuse, cut off the main positive contactor and cut off the main negative contactor. If the power battery is not in a high-voltage connection state, proceed to step S304 to cut off the smart fuse.

[0070] If the power battery is not in the charging gun disconnected mode, proceed to step S305 to determine whether the power battery is in DC charging mode.

[0071] If the power battery is in DC charging mode, proceed to steps S306, S307, S308, S309 and S310 to cut off the smart fuse, the charging positive contactor, the charging negative contactor, the main positive contactor, and the main negative contactor. If the power battery is not in DC charging mode, proceed to step S311 to cut off the smart fuse.

[0072] Optionally, the method may further include the following steps:

[0073] Step S1: Perform fault detection and diagnosis on the status of the actuators and drive circuits in the shutdown path, and transmit the fault information to the instrument for alarm notification. Executions include, but are not limited to, limiting battery power output, prohibiting high-voltage power-on, prohibiting AC / DC charging, prohibiting AC discharging, and prohibiting equalization. Optional:

[0074] (1) Perform fault diagnosis on the circuit that provides power to the internal power supply module, make the voltage input to the high voltage contactor drive circuit and the smart fuse drive circuit effective, and send the status information to the instrument to trigger an alarm;

[0075] (2) Perform fault diagnosis on the status of the high-voltage contactor coil, make the status of the high-voltage contactor coil effective, and send the status information to the instrument;

[0076] (3) Perform fault diagnosis on the contact status of the high-voltage contactor, make the contact status of the high-voltage contactor effective, and send the status information to the instrument;

[0077] (4) Detect the life of the high-voltage contactor, make the life status of the high-voltage contactor valid, and send the status information to the instrument;

[0078] (5) Perform fault diagnosis on the smart fuse driver chip, make the smart fuse driver circuit effective, and send the status information to the instrument;

[0079] (6) Perform fault diagnosis on the resistance value of the smart fuse, make the smart fuse status valid, and send the status information to the instrument to trigger an alarm.

[0080] Step S2: Determine the working mode of the battery management system. If it is in the power-on initialization stage, the high-voltage contactor contact diagnosis and coil status detection need to be completed. If the initialization is completed, the status of the shutdown path execution device and drive circuit needs to be detected in real time.

[0081] Step S3: Determine whether the power battery is in the charging gun disconnected mode. If yes, proceed to S4; otherwise, proceed to S7.

[0082] Step S4: Determine whether the power battery is in a high-voltage connection state. If yes, proceed to S5; otherwise, proceed to S6.

[0083] Step S5: When a serious battery malfunction occurs, the control module issues a control command to shut down the smart fuse, thus cutting off the smart fuse. After the control module issues the command to cut off the smart fuse T ms, the main positive contactor and the main negative contactor are cut off in sequence.

[0084] Step S6: When a serious battery malfunction occurs, the control module issues a control command to shut down the smart fuse, thus cutting off the smart fuse.

[0085] Step S7: Determine whether the power battery is in DC charging mode. If yes, proceed to S8; otherwise, proceed to S9.

[0086] Step S8: When a serious battery fault occurs, the control module issues a control command to shut down the smart fuse and cuts off the smart fuse. After the control module issues the command to cut off the smart fuse, the charging positive contactor, charging negative contactor, main positive contactor and main negative contactor are cut off in sequence.

[0087] Step S9: When a serious battery malfunction occurs, the control module issues a control command to shut down the smart fuse, thus cutting off the smart fuse. After the control module issues the command to cut off the smart fuse, the main positive contactor and the main negative contactor are cut off in sequence.

[0088] Optionally, fault diagnosis can be performed on the circuit that provides power to the internal power supply module, including but not limited to: real-time detection of open circuit faults, low power supply faults and high power supply faults, and feedback of fault status information to the instrument and reminder for maintenance.

[0089] Optionally, fault diagnosis is performed on the high-voltage contactor coil status, including but not limited to: open circuit faults, high-side-to-ground short circuit faults, high-side-to-power supply short circuit faults, low-side-to-power supply short circuit faults, and low-side-to-power supply short circuit faults for the main positive contactor, main negative contactor, charging positive contactor, and charging negative contactor coils. Optionally:

[0090] (1) If there is an open circuit fault, a low power supply fault, or a high power supply fault in the power supply circuit, then coil status fault diagnosis will not be performed.

[0091] (2) If there is no open circuit fault, low power supply fault, or high power supply fault in the power supply circuit, then turn on the coil status diagnostic circuit.

[0092] (3) If the control module detects an open circuit fault, a short circuit fault between the high side of the coil and ground, a short circuit fault between the high side of the coil and the power supply, a short circuit fault between the low side of the coil and the power supply under different states of the coil, it will send the fault status information to the instrument to remind it to repair, and limit the battery power output, request the high voltage to be applied, and prohibit AC and DC charging.

[0093] (4) If the control module detects that the high side of the coil is short-circuited to the power supply and the low side of the coil is short-circuited to ground, it is defined as a constant current fault in the coil.

[0094] Optionally, fault diagnosis is performed on the contact status of the high-voltage contactors, including but not limited to: contact adhesion and open circuit faults of the main positive contactor, main negative contactor, charging positive contactor, and charging negative contactor. Specifically:

[0095] (1) The control module detects the contact status by comparing the voltages at the front and rear ends of the contact;

[0096] (2) The control module performs contact adhesion detection on the high voltage contactor during the power-on initialization phase of the battery management system and when the high voltage is disconnected.

[0097] (3) The control module must disable the insulation detection function during the high voltage disconnection phase until the contact detection is completed;

[0098] (4) If the control module detects an open circuit and sticking fault in the high voltage contactor, it will send the fault status information to the instrument to remind it to repair, and limit the battery output power, prohibit high voltage and AC / DC charging.

[0099] (5) If the control module detects that both the main positive contactor and the main negative contactor contacts are stuck together, a double sticking fault is defined.

[0100] Optionally, the lifespan of the high-voltage contactor can be monitored, and the specific monitoring methods are as follows:

[0101] (1) If the contactor back-end voltage is valid, the contactor back-end voltage exceeds a threshold U, the contactor status indicates "closed", the contactor verification status indicates "valid", the total current verification signal indicates "valid", and the maximum high-voltage battery current in T1 ms exceeds a threshold, the control module estimates the service life of the contactor based on the current and the high-voltage-contactor life coefficient.

[0102] (2) If the switching capability of the contactor is reduced to N cycles and the maximum rated current is within T ms, the control module will send the fault status information to the instrument to remind maintenance, and limit the battery output power, prohibit high voltage and prohibit AC / DC charging.

[0103] Optionally, fault diagnosis is performed on the smart fuse driver chip, including but not limited to: self-test faults, chip communication abnormalities, open circuit faults in the drive circuit, and short circuit faults in the drive circuit. Specifically:

[0104] (1) The control module needs to start testing after the battery management system is powered on and initialized;

[0105] (2) The control module detects chip self-test faults by detecting the power supply voltage and leakage current of the driver chip;

[0106] (3) When the control module detects a fault in the drive chip, it defines a fault in the smart fuse drive, sends the fault status information to the instrument, and reminds the maintenance personnel.

[0107] Optionally, fault diagnosis can be performed on the resistance value of the smart fuse, including but not limited to: resistance value too high fault, resistance value too low fault, specifically:

[0108] (1) The control module defines an over-resistance fault by detecting that the resistance of the smart fuse is greater than aΩ;

[0109] (2) The control module defines a fault as too low resistance when the resistance of the smart fuse is less than bΩ.

[0110] (3) When the control module detects a resistance fault, it defines an over-limit resistance fault, sends the fault status information to the instrument, and reminds the maintenance personnel.

[0111] Optionally, fault diagnosis can be performed on the status of the shutdown path actuators and drive circuits, as well as the overcurrent status of the battery pack total current, and the status information is sent to the control module. The fault diagnosis method may include the following:

[0112] (1) Determining the fault status of the shutdown path execution device and drive circuit:

[0113] By diagnosing faults in the circuits that supply power to the internal power supply module and the status of the high-voltage contactor coil, and by detecting the high-voltage contactor contacts, the lifespan of the high-voltage contactor, the smart fuse driver chip, and the resistance of the smart fuse, and by sending the status information to the instrument, the effectiveness of the status of the actuators and drive circuits can be guaranteed, thereby avoiding the occurrence of power failure in emergency situations and accidental power disconnection in non-emergency shutdown situations.

[0114] (2) Current sensor fault diagnosis

[0115] Every 10ms, the current measurement signal on the internal Controller Area Network (CAN) bus is read, and the measured value is cyclically redundantly checked. If erroneous data, invalid values, or no messages are received from the current sensor, the power supply of the current sensor is out of range, the battery current signal status is set to invalid, and a sensor fault is reported. If the current sensor is diagnosed as invalid, a battery fault is reported, and the user is reminded to repair it.

[0116] (3) Battery pack current over-limit fault diagnosis

[0117] The current measurement signal is read every 10ms. If the current exceeds 2000A and the duration exceeds 50ms, the battery is judged to be over-limit fault.

[0118] In this embodiment, by determining whether the power battery is in a charging gun disconnected mode, if the power battery is in a charging gun disconnected mode, it is determined whether the power battery is in a high-voltage connected state. If the power battery is in a high-voltage connected state, the smart fuse and the main positive contactor are disconnected. If the power battery is not in a high-voltage connected state, the smart fuse is disconnected. If the power battery is not in a charging gun disconnected mode, it is determined whether the power battery is in a DC charging mode. If the power battery is in a DC charging mode, the smart fuse, the charging positive contactor, the charging negative contactor, the main positive contactor, and the main negative contactor are disconnected. If the power battery is not in a DC charging mode, the smart fuse is disconnected. This solves the technical problem of not being able to effectively disconnect the power battery under different conditions and achieves the technical effect of effectively disconnecting the power battery under different conditions.

[0119] Example 3

[0120] According to an embodiment of the present invention, a control device for a vehicle's power battery is also provided. It should be noted that this control device for a vehicle's power battery can be used to execute a control method for a vehicle's power battery as described in Embodiment 1.

[0121] Figure 4 This is a schematic diagram of a control device for a vehicle's power battery according to an embodiment of the present invention. Figure 4 As shown, the control device 400 for the vehicle's power battery may include: a determination unit 401, a first response unit 402, and a second response unit 403.

[0122] The determining unit 401 is used to determine the operating mode of the vehicle's battery management system.

[0123] The first response unit 402 is used to obtain the working status of both the vehicle's actuators and the vehicle's drive circuit in response to the first working mode, wherein the first working mode is used to indicate that the battery management system has completed initialization.

[0124] The second response unit 403 is used to control the actuator and / or drive circuit in response to the fault state of the working state, obtain the control result, and send the vehicle fault information corresponding to the fault state to the vehicle for display.

[0125] Optionally, the control device 400 of the vehicle's power battery may further include: a third response unit, configured to detect the state of the vehicle's high-voltage contactor contacts and the vehicle's high-voltage contactor coil in response to the second operating mode, and obtain a detection result, wherein the second operating mode is used to characterize the battery management system being in the initialization phase; a fourth response unit, configured to control the high-voltage contactor contacts in response to the detection result indicating that the state of the high-voltage contactor contacts is in a fault state, and send fault information to the vehicle for display; and / or, a fifth response unit, configured to control the high-voltage contactor coil in response to the detection result indicating that the state of the high-voltage contactor coil is in a fault state, and send fault information to the vehicle for display.

[0126] Optionally, the second response unit 403 may include: a first response module, used to send a shutdown command using the vehicle's control module in response to the power battery being in a charging gun disconnected mode and the power battery being in a high-voltage connected state; and a second response module, used to shut down the smart fuse and the vehicle's main positive contactor and main negative contactor in response to the vehicle's smart fuse drive module receiving the shutdown command.

[0127] Optionally, the control device 400 of the vehicle's power battery may further include: a sixth response unit, used to send a shutdown command using the vehicle's control module in response to the power battery being in a charging gun disconnected mode and the power battery not being in a high-voltage connection state; and a seventh response unit, used to shut down the smart fuse in response to the vehicle's smart fuse drive module receiving the shutdown command.

[0128] Optionally, the control device 400 for the vehicle's power battery may further include: an eighth response unit, used to send a shutdown command via the control module in response to the power battery not being in the charging gun disconnected mode and the power battery being in DC charging mode; and a ninth response unit, used to shut down the smart fuse and the vehicle's charging positive contactor, charging negative contactor, main positive contactor, and main negative contactor in response to the smart fuse drive module receiving the shutdown command.

[0129] Optionally, the control device 400 for the vehicle's power battery may further include: a tenth response unit, used to send a shutdown command via the control module in response to the power battery not being in the charging gun disconnected mode and the power battery not being in the DC charging mode; and an eleventh response unit, used to shut down the smart fuse and the vehicle's main positive contactor and main negative contactor in response to the smart fuse drive module receiving the shutdown command.

[0130] In this embodiment, a determining unit is used to determine the operating mode of the vehicle's battery management system; a first response unit is used to obtain the operating states of both the vehicle's actuators and the vehicle's drive circuit in response to the operating mode being the first operating mode, wherein the first operating mode is used to indicate that the battery management system has completed initialization; and a second response unit is used to control the actuators and / or drive circuit in response to the operating state being a fault state, obtain the control result, and send the vehicle's fault information corresponding to the fault state to the vehicle for display. This solves the technical problem of not being able to effectively disconnect the power battery under different conditions and achieves the technical effect of being able to effectively disconnect the power battery under different conditions.

[0131] Example 4

[0132] According to an embodiment of the present invention, a computer-readable storage medium is also provided, the storage medium including a stored program, wherein the program executes the control method of the power battery of the vehicle in Embodiment 1.

[0133] Example 5

[0134] According to an embodiment of the present invention, a processor is also provided for running a program, wherein the program is executed by the processor to perform the control method of the vehicle's power battery in Embodiment 1.

[0135] Example 6

[0136] According to an embodiment of the present invention, a vehicle is also provided, which is used to execute the control method of the power battery of any of the vehicles in Embodiment 1.

[0137] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0138] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0139] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between units or modules may be electrical or other forms.

[0140] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0141] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0142] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0143] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A control method of a power storage device of a vehicle, characterized by, The method comprises: determining the working mode of the battery management system of the vehicle; in response to the working mode being a first working mode, acquiring the working state of both the actuator of the vehicle and the drive circuit of the vehicle, wherein the first working mode is used to represent that the battery management system has completed initialization, the actuator at least comprises a high-voltage contactor module and an intelligent fuse, the high-voltage contactor module at least comprises a main positive contactor, a main negative contactor, a charging positive contactor and a charging negative contactor, and the drive circuit is used to represent a circuit for providing power supply to an internal power supply module of the vehicle, and the internal power supply module is used to convert the voltage provided by an external power supply module into the working voltage required by a high-voltage contactor drive module and an intelligent fuse drive module; in response to the working state being a fault state, controlling the actuator and / or the drive circuit to obtain a control result, and sending the fault information of the vehicle corresponding to the fault state to the vehicle for display; wherein the method further comprises: according to the fault severity state of the power battery, controlling the high-voltage contactor drive module and the intelligent fuse drive module to be turned off cooperatively, the high-voltage contactor drive module is used to turn off the power supply of the high-voltage contactor coil by receiving the turn-off instruction issued by the control module, thereby realizing power-off, and the intelligent fuse drive module is used to turn off the main circuit of the battery by receiving the turn-off instruction issued by the control module, thereby realizing power-off.

2. The method of claim 1, wherein, After determining the working mode of the battery management system of the vehicle, the method further comprises: in response to the working mode being a second working mode, detecting the state of the high-voltage contactor contact and the high-voltage contactor coil of the vehicle to obtain a detection result, wherein the second working mode is used to represent that the battery management system is in an initialization stage; in response to the detection result being that the state of the high-voltage contactor contact is in a fault state, controlling the high-voltage contactor contact, and sending the fault information to the vehicle for display; and / or, in response to the detection result being that the state of the high-voltage contactor coil is in a fault state, controlling the high-voltage contactor coil, and sending the fault information to the vehicle for display.

3. The method of claim 1, wherein, in response to the working state being a fault state, controlling the actuator and / or the drive circuit to obtain a control result, and sending the fault information of the vehicle corresponding to the fault state to the vehicle for display, comprising: in response to the power battery being in a charging gun disconnection mode and the power battery being in a high-voltage connection state, sending a turn-off instruction by using the control module of the vehicle; in response to the intelligent fuse drive module of the vehicle receiving the turn-off instruction, turning off the intelligent fuse and turning off the main positive contactor and the main negative contactor of the vehicle.

4. The method of claim 3, wherein, The method further comprises: in response to the power battery being in the charging gun disconnection mode and the power battery not being in the high-voltage connection state, sending a turn-off instruction by using the control module of the vehicle; In response to the intelligent fuse driving module receiving the shutdown instruction, the intelligent fuse is shut down.

5. The method of claim 3, wherein, The method further comprises: In response to the power battery not being in the charging gun disconnection mode and the power battery being in the direct current charging mode, the control module sends the shutdown instruction; In response to the intelligent fuse driving module receiving the shutdown instruction, the intelligent fuse is shut down, and the charging positive contactor, the charging negative contactor, the main positive contactor and the main negative contactor of the vehicle are shut down.

6. The method of claim 5, wherein, The method further comprises: In response to the power battery not being in the charging gun disconnection mode and the power battery not being in the direct current charging mode, the control module sends the shutdown instruction; In response to the intelligent fuse driving module receiving the shutdown instruction, the intelligent fuse is shut down, and the main positive contactor and the main negative contactor of the vehicle are shut down.

7. A control device of a power storage device of a vehicle, characterized by comprising: Comprise: A determination unit is configured to determine a working mode of a battery management system of a vehicle; A first response unit is configured to, in response to the working mode being a first working mode, acquire a working state of both an actuator of the vehicle and a driving circuit of the vehicle, wherein the first working mode is used to represent that the battery management system has completed initialization, the actuator at least includes a high-voltage contactor module and an intelligent fuse, the high-voltage contactor module at least includes a main positive contactor, a main negative contactor, a charging positive contactor and a charging negative contactor, and the driving circuit is used to represent a circuit for providing power supply to an internal power supply module of the vehicle, and the internal power supply module is used to convert a voltage provided by an external power supply module into a working voltage required by a high-voltage contactor driving module and an intelligent fuse driving module; A second response unit is configured to, in response to the working state being a fault state, control the actuator and / or the driving circuit to obtain a control result, and send fault information of the vehicle corresponding to the fault state to the vehicle for display; The second response unit is further configured to, according to a fault severity state of the power battery, control the high-voltage contactor driving module and the intelligent fuse driving module to be cooperatively disconnected, the high-voltage contactor driving module is configured to disconnect power supply of a high-voltage contactor coil by receiving a shutdown instruction sent by a control module, so as to realize power shutdown, and the intelligent fuse driving module is configured to disconnect a main circuit of the battery by receiving the shutdown instruction sent by the control module, so as to realize power shutdown.

8. A computer-readable storage medium, characterized in that, The computer readable storage medium comprises a stored program, wherein when the program is running, the computer readable storage medium controls the device where the computer readable storage medium is located to execute the control method of the power battery of the vehicle in any one of claims 1 to 6.

9. A processor, comprising: The processor is configured to run a program, wherein when the program is run by the processor, the control method of the power battery of the vehicle in any one of claims 1 to 6 is executed.

10. A vehicle characterized by comprising: The vehicle is configured to execute the control method of the power battery of the vehicle in any one of claims 1 to 6.

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