Temperature processing method and apparatus for power battery, device, and storage medium

Abstract

Provided are a temperature processing method and apparatus for a power battery, a device, a storage medium, and a computer program product. The temperature processing method comprises: waking up a battery management system by means of a clock chip; in response to the temperature of a power battery does not satisfy a set range, sending a wake-up signal and a battery thermal management request to a vehicle control unit by means of a communication chip of the battery management system; in response to the vehicle state satisfies a start-up condition, starting the battery management system by means of the vehicle control unit; and in response to the temperature of the power battery satisfies the set range, stopping sending the wake-up signal and the battery thermal management request by means of the battery management system, and controlling the battery management system to enter a sleep state. The temperature processing method can ensure that the temperature of a power battery is within an appropriate range, avoiding slow or impossible vehicle starting due to degradation of the power battery performance, improving the experience of using vehicles.

Description

Temperature processing method, device, equipment and storage medium for power battery

[0001] This application claims priority to the Chinese patent application filed on November 2, 2023, with application number 202311452112.6 and invention name “Temperature treatment method, device, equipment and storage medium for power batteries”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of power batteries, and in particular to a temperature management method, device, equipment, and storage medium for power batteries. Background Art

[0003] As the primary power source for new energy vehicles, power batteries are of undeniable importance. Temperature significantly impacts the performance, lifespan, and safety of power batteries.

[0004] In related technologies, the battery thermal management system can be used to keep the power battery operating within a suitable temperature range, thereby maintaining the power battery in its optimal working state and meeting the use requirements of new energy vehicles.

[0005] However, if new energy vehicles are parked in harsh external environments for a long time, the power batteries are more easily affected by the ambient temperature, causing the charging and discharging performance to deteriorate; and the BMS of the parked vehicle is in a dormant state for a long time, and the battery thermal management cannot be started, which can easily lead to the vehicle starting slowly or not starting when it is used again, resulting in a poor driving experience.

[0006] Summary of the Invention

[0007] The present application provides a temperature management method, device, equipment and storage medium for a power battery, which can ensure that the temperature of the power battery is within an appropriate range, thereby improving the vehicle-using experience; the content of the technical solution is as follows.

[0008] According to one aspect of the present application, a temperature management method for a power battery is provided, the method comprising:

[0009] Wake up the battery management system through the clock chip;

[0010] In response to the temperature of the power battery not meeting a set range, sending a wake-up signal and a battery thermal management request to the vehicle controller through the communication chip of the battery management system; the wake-up signal is used to wake up the vehicle controller;

[0011] In response to the vehicle state satisfying the start-up condition, starting the battery thermal management system through the vehicle controller;

[0012] In response to the temperature of the power battery meeting the set range, the battery management system stops sending the wake-up signal and the battery thermal management request, and controls the battery management system to enter a dormant state.

[0013] According to one aspect of the present application, a temperature treatment device for a power battery is provided, the device comprising:

[0014] Wake-up module, used to wake up the battery management system through the clock chip;

[0015] a sending module, configured to send a wake-up signal and a battery thermal management request to a vehicle controller via a communication chip of the battery management system in response to the temperature of the power battery not meeting a set range; the wake-up signal is used to wake up the vehicle controller;

[0016] A starting module, configured to start the battery thermal management system through the vehicle controller in response to the vehicle state satisfying the starting condition;

[0017] The stopping module is used to stop sending the wake-up signal and the battery thermal management request through the battery management system in response to the temperature of the power battery meeting the set range, and control the battery management system to enter a dormant state.

[0018] In some embodiments, the wake-up module is used to:

[0019] In response to a set condition being met, the battery management system is awakened at a fixed time by the clock chip; the set condition includes that the battery management system is in a dormant state and the ambient temperature of the vehicle does not meet a specific range.

[0020] In some embodiments, the startup module is used to:

[0021] In response to the vehicle state satisfying the start condition, sending a start signal to the battery thermal management system through the vehicle controller;

[0022] The battery thermal management system receives the start signal and starts operation.

[0023] In some embodiments, the device further comprises: a control module configured to:

[0024] In response to the vehicle state not satisfying the start condition, not sending or stopping sending the start signal by the vehicle controller;

[0025] Stop sending the wake-up signal and the battery thermal management request by the battery management system;

[0026] Control the battery management system to enter the dormant state.

[0027] In some embodiments, the setting range is 20°C-40°C.

[0028] In some embodiments, the start-up condition includes: the power battery state of charge SOC ≥ 8%.

[0029] According to another aspect of the present application, a computer device is provided, comprising a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set, or an instruction set, and the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by the processor to implement the temperature processing method for a power battery as described above.

[0030] According to another aspect of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores at least one instruction, at least one program, a code set, or an instruction set, and the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by a processor to implement the temperature processing method for a power battery as described above.

[0031] According to another aspect of the present application, a computer program product is provided, which includes computer instructions stored in a computer-readable storage medium. A processor reads and executes the computer instructions from the computer-readable storage medium to implement the temperature processing method for a power battery as described above.

[0032] The technical solutions provided by the embodiments of the present application may have the following beneficial effects:

[0033] The battery management system is awakened by the clock chip. In response to the power battery temperature not meeting the set range, the battery management system's communication chip sends a wake-up signal and a battery thermal management request to the vehicle controller. In response to the vehicle status meeting the start-up conditions, the vehicle controller activates the battery thermal management system. In response to the power battery temperature meeting the set range, the battery management system stops sending the wake-up signal and battery thermal management request and controls the battery management system to enter a dormant state. By waking up the dormant battery management system through the clock chip and activating the battery thermal management system to heat or cool the power battery when the power battery temperature is unsuitable, this ensures the power battery temperature remains within the appropriate range, preventing slow or inability to start the vehicle due to deteriorating power battery performance, and thus improving the driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0035] FIG1 is a diagram of a new energy vehicle network control system provided by an exemplary embodiment of the present application;

[0036] FIG2 is a flow chart of a temperature management method for a power battery provided by an exemplary embodiment of the present application;

[0037] FIG3 is a flow chart of a temperature management method for a power battery provided by another exemplary embodiment of the present application;

[0038] FIG4 is a flow chart of a temperature management method for a power battery provided by another exemplary embodiment of the present application;

[0039] FIG5 is a control strategy flow chart of a power battery thermal management solution in a harsh environment provided by an exemplary embodiment of the present application;

[0040] FIG6 is a block diagram of a temperature processing device for a power battery according to an exemplary embodiment of the present application;

[0041] FIG7 is a structural block diagram of a computer device provided by an exemplary embodiment of the present application.

[0042] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0043] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0044] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0045] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0046] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, storage, and display, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. The collection, use, and processing of such data must comply with the relevant laws, regulations, and standards of the relevant countries and regions. For example, the attack operations and other object behaviors involved in this application were obtained with full authorization.

[0047] It should be understood that although the terms first, second, etc. may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, a first parameter may also be referred to as a second parameter, and similarly, a second parameter may also be referred to as a first parameter without departing from the scope of this disclosure. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0048] The following are some definitions of terms involved in this application:

[0049] A Battery Management System (BMS), commonly known as a battery nanny or battery steward, intelligently manages and maintains each battery cell, preventing overcharge and over-discharge, extending battery life, and monitoring battery status. The BMS is tightly integrated with an electric vehicle's power battery, using sensors to monitor the battery's voltage, current, and temperature in real time. It also performs leakage detection, thermal management, cell balancing, and alarm notifications, monitoring the battery's state of charge (SOC), depth of discharge (DOD), state of health (SOH), and remaining energy (SOE). Based on the battery's voltage, current, and temperature, it uses algorithms to control maximum output power for maximum driving range and to control the charger for optimal charging current. The BMS communicates in real time with the vehicle's master controller, motor controller, energy control system, and onboard display system via a Controller Area Network (CAN) bus interface.

[0050] The Vehicle Control Unit (VCU) is the core electronic control unit that implements vehicle control decisions. As the central control unit for new energy vehicles, it is the heart of the entire control system. The VCU determines the driver's driving intention by collecting signals from the accelerator pedal, gear position, and brake pedal. The VCU monitors vehicle status (speed, temperature, etc.) and, after processing, sends vehicle operating status control instructions to the powertrain and power battery system. The VCU controls the operating mode of the onboard accessory power system and provides fault diagnosis, protection, and storage for the entire vehicle system.

[0051] Battery thermal management is a key function within the BMS, primarily designed to maintain the battery pack within a suitable operating temperature range, thereby maintaining optimal operating conditions. Battery thermal management is crucial for pure electric vehicles, hybrid electric vehicles, and other battery-powered powertrains. It primarily includes cooling, heating, and temperature equalization. Cooling and heating primarily address the potential impact of ambient temperature on the battery, while temperature equalization minimizes temperature variations within the battery pack to prevent rapid degradation caused by overheating of a single cell.

[0052] Please refer to Figure 1, which shows a new energy vehicle network control system provided by an exemplary embodiment of the present application. As shown in Figure 1, the vehicle network control system includes a vehicle controller VCU, a motor controller (Moter Control Unit, MCU), a high-voltage power distribution unit (Power Distribution Unit, PDU), an electric power steering (Electric Power Steering, EPS), a battery management system BMS, an anti-lock braking system (Anti-lock Braking System, ABS), an electronic parking brake system (Electrical Park Brake, EPB), a steering angle sensor (Steering Angle Sensor, SAS), a CAN / LIN bus gateway, an instrument cluster ICU, an electric door and window ECU, a body controller (BCM), a one-button start system (Passive Entry Passive Start, PEPS) and an on-board monitoring terminal VMT.

[0053] The vehicle controller VCU, motor controller MCU, high-voltage power distribution box PDU, electric power steering EPS, airbag system SRS, battery management system BMS, anti-lock braking system ABS, electronic parking brake system EPB, and steering angle sensor SAS communicate in real time through the CAN bus; the CAN / LIN bus gateway controls the CAN bus; the instrument cluster ICU, power door and window ECU, vehicle monitoring terminal VMT, body controller BCM, push-to-start system PEPS, and vehicle monitoring terminal VMT communicate in real time through the serial communication protocol (Local Interconnect Network, LIN) bus.

[0054] The vehicle control system of pure electric vehicles is mainly divided into two schemes: centralized control and distributed control.

[0055] The basic concept of a centralized control system is that the vehicle controller independently collects input signals, analyzes and processes the data according to the control strategy, and then directly issues control commands to each actuator to drive the pure electric vehicle normally. The advantages of a centralized control system are centralized processing, fast response, and low cost; the disadvantages are complex circuitry and poor heat dissipation.

[0056] The basic concept of a distributed control system is that the vehicle controller collects driver signals and communicates with the motor controller and battery management system via the CAN bus. The motor controller and battery management system each transmit their collected vehicle signals to the vehicle controller via the CAN bus. The vehicle controller analyzes and processes this data based on vehicle information and control strategies. After receiving control commands, the motor controller and battery management system control motor operation and battery discharge based on the current status of the motor and battery. The advantages of a distributed control system are modularity and low complexity; the disadvantage is relatively high cost.

[0057] The vehicle control unit (VCU) receives information from the motor controller and battery management system via the CAN bus and sends control commands to these controllers, as well as the onboard information display system. The motor controller and battery management system are responsible for monitoring and managing the drive motor and power battery pack, respectively. The onboard information display system displays information such as the vehicle's current status.

[0058] The temperature of the power battery has a great impact on its performance, life and safety, so the importance of the power battery thermal management system to the vehicle is self-evident.

[0059] Under various driving conditions of the vehicle (including harsh ambient temperatures), the battery thermal management system can keep the power battery operating within a suitable temperature range at all times, thereby maintaining the battery's optimal working state and meeting vehicle usage requirements.

[0060] However, if the vehicle is parked in a harsh external environment for a long time, the power battery is more easily affected by the ambient temperature, resulting in deterioration of the charging and discharging performance; and the parked vehicle is in a dormant state, and the battery thermal management cannot be started. When the vehicle is used again, the actual operating temperature of the power battery of the entire vehicle is not within the appropriate range, resulting in limited battery charging and discharging power, causing the vehicle to travel slowly or be unable to start, resulting in a poor driving experience.

[0061] Therefore, the battery management system (BMS) wakes up periodically when the vehicle is in sleep mode and requests a thermal management solution based on the temperature detection results, which is of great significance for improving the user experience in scenarios where the vehicle is parked for a long time.

[0062] Please refer to Figure 2, which shows a flow chart of a temperature management method for a power battery provided by an exemplary embodiment of the present application. The method is executed by a computer device, as shown in Figure 2, and the method may include steps 210, 220, 230, and 240.

[0063] Step 210: Wake up the battery management system through the clock chip.

[0064] In an embodiment of the present application, the computer device can wake up the battery management system through the clock chip.

[0065] When a vehicle is parked for a long time, the battery management system is in a dormant state. Therefore, the clock chip is needed to wake up the battery management system.

[0066] In some embodiments, the computer device can set the prerequisites for the clock chip to wake up the battery management system, such as when the vehicle is parked for a long time, or when the vehicle is in an extremely cold or high temperature environment.

[0067] The time interval for the clock chip to wake up the battery management system can also be set, for example, the battery management system can be woken up every 30 minutes or 1 hour.

[0068] Step 220: In response to the temperature of the power battery not meeting the set range, a wake-up signal and a battery thermal management request are sent to the vehicle controller through the communication chip of the battery management system; the wake-up signal is used to wake up the vehicle controller.

[0069] In this embodiment of the present application, after the battery management system is awakened by the clock chip in step 210, if the computer device detects that the power battery temperature does not meet the set range, that is, the power battery temperature needs to be adjusted, the battery management system's communication chip can send a wake-up signal and a battery thermal management request to the vehicle controller to wake up the vehicle controller.

[0070] Among them, the wake-up signal is used to wake up the vehicle controller.

[0071] The battery thermal management request varies depending on the power battery temperature. For example, if the power battery temperature is below a set range, the battery thermal management request is to increase the power battery temperature and initiate heating of the power battery. Alternatively, if the power battery temperature is above a set range, the battery thermal management request is to decrease the power battery temperature and initiate cooling of the power battery.

[0072] In some embodiments, after the battery management system is awakened by the clock chip in step 210, if the computer device detects that the power battery temperature is within the set range, that is, the power battery temperature does not need to be adjusted. In this case, there is no need to send a wake-up signal and battery thermal management request to the vehicle controller through the battery management system's communication chip, and the battery management system then enters a dormant state.

[0073] Step 230: In response to the vehicle status satisfying the start-up conditions, the battery thermal management system is started through the vehicle controller.

[0074] In the embodiment of the present application, after step 220 wakes up the vehicle controller, if the computer device detects that the vehicle status meets the start-up conditions for starting the battery thermal management system, the battery thermal management system can be started through the vehicle controller; according to the battery thermal management request, the heating or cooling of the power battery is started, and the temperature of the power battery is adjusted.

[0075] Among them, the above-mentioned starting conditions include fault-free diagnosis of the vehicle status and the remaining battery power, etc., such as detecting whether the vehicle has interlocking, insulation and other faults that affect normal high voltage, or low power battery SOC (such as SOC <8%), single cell undervoltage, pressure difference and other faults that affect power output.

[0076] Step 240: In response to the temperature of the power battery meeting the set range, the battery management system stops sending the wake-up signal and the battery thermal management request, and controls the battery management system to enter a dormant state.

[0077] In an embodiment of the present application, step 230 starts the battery thermal management system through the vehicle controller, and after adjusting the temperature of the power battery, when the computer device detects that the temperature of the power battery meets the set range, the battery management system can stop sending wake-up signals and battery thermal management requests, and control the battery management system to enter a sleep state.

[0078] In summary, the solution shown in the embodiment of the present application is to wake up the battery management system through the clock chip; in response to the power battery temperature not meeting the set range, the battery management system's communication chip sends a wake-up signal and a battery thermal management request to the vehicle controller; in response to the vehicle status meeting the start-up conditions, the battery thermal management system is started by the vehicle controller; in response to the power battery temperature meeting the set range, the battery management system stops sending the wake-up signal and the battery thermal management request, and controls the battery management system to enter a dormant state. By waking up the dormant battery management system through the clock chip and activating the battery thermal management system to heat or cool the power battery when the power battery temperature is unsuitable, the power battery temperature can be kept within the appropriate range, avoiding slow or inability to start the vehicle due to deterioration of the power battery performance, thereby improving the vehicle user experience.

[0079] Please refer to Figure 3, which shows a flow chart of a temperature management method for a power battery provided by another exemplary embodiment of the present application. The method is executed by a computer device. As shown in Figure 3, step 210 in the embodiment shown in Figure 2 above can be implemented as step 210a.

[0080] Step 210a: In response to a set condition being met, the battery management system is awakened at a fixed time by the clock chip; the set condition includes that the battery management system is in a dormant state and the ambient temperature of the vehicle does not meet a specific range.

[0081] In an embodiment of the present application, conditions for the clock chip to wake up the battery management system are set. When the set conditions are met, the computer device wakes up the battery management system through the clock chip at a fixed time.

[0082] The set conditions include that the battery management system is in a dormant state and the ambient temperature of the vehicle does not meet a specific range.

[0083] The frequency of waking up the battery management system periodically may be to wake up the battery management system in a dormant state once every 30 minutes.

[0084] The above-mentioned embodiment of the present application provides a technical solution for waking up the battery management system by a clock chip, including setting specific conditions. When the set conditions are met, the battery management system is awakened periodically by the clock chip; on the one hand, it can prevent the battery management system from waking up too frequently and causing waste of vehicle system resources; on the other hand, it can prevent the battery management system from sleeping for too long and causing failure to adjust the temperature of the power battery in time.

[0085] Based on the scheme shown in Figure 2 or Figure 3 above, please refer to Figure 4, which shows a flow chart of a temperature management method for a power battery provided by another exemplary embodiment of the present application. The method is executed by a computer device. As shown in Figure 4, step 230 in the embodiment shown in Figure 2 or Figure 3 above can be implemented as step 230a and step 230b.

[0086] Step 230a: In response to the vehicle status meeting the start-up condition, a start-up signal is sent to the battery thermal management system via the vehicle controller.

[0087] In an embodiment of the present application, when the vehicle status meets the start-up conditions, the computer device can send a start-up signal to the battery thermal management system through the vehicle controller.

[0088] Among them, the start signal is used to start the battery thermal management system.

[0089] Step 230b: Receive a start signal through the battery thermal management system and start operation.

[0090] In the embodiment of the present application, after the battery thermal management system receives the start signal sent by the vehicle controller, it starts working and starts heating or cooling the power battery according to the battery thermal management request in step 220 to adjust the temperature of the power battery.

[0091] The above-mentioned embodiment of the present application provides a technical solution for starting the battery thermal management system, including sending a start signal to the battery thermal management system through the vehicle controller when the vehicle status meets the start conditions; the battery thermal management system receives the start signal and starts working; and adjusts the temperature of the power battery to avoid deterioration of the performance of the power battery.

[0092] In some embodiments, the method further comprises:

[0093] In response to the vehicle state not satisfying the start condition, not sending or stopping sending the start signal through the vehicle controller;

[0094] Stop sending wake-up signals and battery thermal management requests through the battery management system;

[0095] Controls the battery management system to enter sleep mode.

[0096] In the embodiment of the present application, when the opposite situation to step 230 occurs, that is, the vehicle state does not meet the starting conditions, the vehicle state at this time is not good and is not suitable for starting the vehicle, so there is no need to adjust the temperature of the power battery.

[0097] In this case, the computer device does not send or stops sending the start signal through the vehicle controller; stops sending the wake-up signal and battery thermal management request through the battery management system; and controls the battery management system to enter a dormant state.

[0098] The above-mentioned embodiments of the present application propose a supplementary technical solution when the vehicle status does not meet the starting conditions. When the vehicle status does not meet the starting conditions, the vehicle controller does not send or stops sending the starting signal; the battery management system stops sending the wake-up signal and the battery thermal management request, and controls the battery management system to enter the sleep state; it can avoid unnecessary power battery temperature adjustment and rationally utilize vehicle system resources.

[0099] In some embodiments, the setting range of the above steps 220 and 240 is 20°C-40°C.

[0100] In an embodiment of the present application, when the temperature of the power battery is lower than 20°C or higher than 40°C, a wake-up signal and a battery thermal management request are sent to the vehicle controller through the communication chip of the battery management system to wake up the vehicle controller.

[0101] The above embodiments of the present application propose a specific range of suitable temperature for the power battery, which provides a temperature condition for waking up the vehicle controller and avoids the deterioration of the power battery performance due to excessively high or low temperature of the power battery.

[0102] In some embodiments, the starting conditions of the above step 230 and step 230a include: the state of charge (SOC) of the power battery ≥ 8%.

[0103] In the embodiment of the present application, when the state of charge (SOC) of the power battery is ≥8%, the battery thermal management system is started by the vehicle controller, and the battery thermal management system adjusts the temperature of the power battery according to the battery thermal management request in step 220 .

[0104] In some embodiments, other starting conditions can be set, such as detecting whether the vehicle has interlocking, insulation, or other faults that affect normal high voltage, or whether the power battery has single cell undervoltage, pressure difference, or other faults that affect power output. The battery thermal management system can only be started if there are no such faults.

[0105] The above embodiment of the present application proposes a start-up condition for a battery thermal management system to judge the vehicle status (including hardware failure, remaining battery power, etc.) When the vehicle status is not good, it is not necessary to control the temperature of the power battery.

[0106] When a vehicle is in a dormant state and parked in a harsh external environment for a long time, the battery thermal management cannot be activated, and the power battery is more easily affected by the ambient temperature, causing the charging and discharging performance to deteriorate.

[0107] To overcome the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a solution for a battery thermal management system in extreme environments. This solution is simple in strategy and cost-effective, and significantly improves the user experience when the vehicle is parked for long periods of time.

[0108] The BMS is woken up periodically by the clock chip, and the BMS performs real-time temperature detection and initiates a thermal management request based on the detection results. The vehicle controller is woken up by the communication chip, and the power battery thermal management system is started according to the thermal management request initiated by the BMS, effectively managing the battery temperature so that the battery is always at the optimal operating temperature, avoiding the impact of harsh ambient temperatures on vehicles parked for a long time, resulting in a poor user experience.

[0109] Please refer to FIG5 , which shows a control strategy flow chart of a power battery thermal management solution in a harsh environment provided by an exemplary embodiment of the present application. As shown in FIG5 , the solution includes:

[0110] The battery management system BMS clock chip is used to regularly wake up the battery management system BMS and start the power battery temperature detection.

[0111] Among them, when the vehicle is in a stopped state and the BMS enters a dormant state, the BMS is awakened by the clock chip every 30 minutes.

[0112] The battery management system BMS communication chip is used to wake up the vehicle controller VCU through a network signal. When the vehicle controller VCU receives a thermal management request, it keeps detecting the vehicle status.

[0113] When the battery management system BMS is awakened and detects that the power battery temperature is not within the set temperature threshold range, the communication chip is used to wake up the vehicle controller VCU through a network signal.

[0114] The above-set temperature threshold range may be 20°C-40°C.

[0115] When the vehicle controller VCU is awakened and detects that the vehicle status (including fault diagnosis, remaining battery power, etc.) supports the thermal management request, it responds to the battery thermal management request and starts heating or cooling the power battery.

[0116] Among them, detecting the status of the entire vehicle includes detecting whether the entire vehicle has interlocking, insulation and other faults that affect normal high voltage, or whether the power battery has low SOC (<8%), single cell undervoltage, pressure difference and other faults that affect power output.

[0117] Furthermore, when the battery management system BMS detects that the power battery temperature has been adjusted to within the set temperature threshold range, the battery management system BMS stops the thermal management request and stops sending the wake-up signal. The battery thermal management system stops working and the entire vehicle enters a dormant state.

[0118] During the heating or cooling process of the power battery, once the vehicle controller VCU detects that the vehicle status (including fault diagnosis, remaining battery power, etc.) does not meet the conditions for responding to the battery thermal management request, even if the power battery temperature has not been adjusted to the set temperature threshold, the vehicle controller VCU stops sending the power battery thermal management system working signal, and the battery management system BMS also stops the thermal management request and stops sending the wake-up signal. The power battery thermal management system stops working and the vehicle enters a dormant state.

[0119] In summary, the embodiments of the present application can be applied to the following scenarios: new energy electric vehicles are parked in an external environment for a long time, especially in a harsh environment. The battery thermal management cannot be started, causing the actual temperature of the lithium battery to deteriorate due to the influence of the ambient temperature. When the vehicle is used again, the entire vehicle will travel slowly or be unable to start due to limited battery power.

[0120] This application solves the problem that when a vehicle is parked for a long time in harsh environments, the battery thermal management cannot start, causing the entire vehicle to run slowly or be unable to start due to limited battery power.

[0121] The innovative points of this application are as follows:

[0122] 1. Use a clock chip to regularly wake up the BMS to detect temperature and initiate thermal management requests based on the detection results;

[0123] Second, the communication chip can wake up the vehicle controller VCU and start the thermal management system according to the thermal management request initiated by the battery management system BMS, effectively managing the temperature of the power battery so that the power battery is always at a suitable operating temperature.

[0124] The technical solution of this application:

[0125] The clock chip is used to periodically wake up the BMS for temperature detection and initiate a thermal management request based on the detection results. The vehicle controller is woken up through the communication chip. According to the thermal management request initiated by the BMS, the thermal management system is started to effectively manage the temperature of the power battery and continuously improve the user experience. Therefore, it has huge application potential in the field of thermal management systems for power batteries of new energy vehicles.

[0126] The clock chip is used to regularly wake up the battery management system BMS to perform temperature detection and initiate a thermal management request based on the detection results. The vehicle controller VCU is woken up through the communication chip. According to the thermal management request initiated by the battery management system BMS, the power battery thermal management system is started to effectively manage the temperature of the power battery and continuously improve the user experience. Therefore, it has huge application potential in the field of power battery thermal management systems for new energy vehicles.

[0127] FIG6 shows a block diagram of a temperature processing device for a power battery according to an exemplary embodiment of the present application. The device can be used to execute all or part of the steps executed by a computer device in the method shown in FIG2 , FIG3 , or FIG4 . The device includes:

[0128] A wake-up module 601 is used to wake up the battery management system through the clock chip;

[0129] The sending module 602 is configured to send a wake-up signal and a battery thermal management request to the vehicle controller via the communication chip of the battery management system in response to the temperature of the power battery not meeting the set range; the wake-up signal is used to wake up the vehicle controller;

[0130] A starting module 603 is configured to start the battery thermal management system through the vehicle controller in response to the vehicle state satisfying the starting condition;

[0131] The stopping module 604 is configured to stop sending the wake-up signal and the battery thermal management request through the battery management system in response to the temperature of the power battery meeting a set range, and control the battery management system to enter a dormant state.

[0132] In some embodiments, the wake-up module 601 is used to:

[0133] In response to set conditions being met, the battery management system is awakened at a fixed time by the clock chip; the set conditions include that the battery management system is in a dormant state and the ambient temperature of the vehicle does not meet a specific range.

[0134] In some embodiments, the startup module 603 is used to:

[0135] In response to the vehicle state meeting the start-up conditions, a start-up signal is sent to the battery thermal management system through the vehicle controller;

[0136] Receives the start signal through the battery thermal management system and starts working.

[0137] In some embodiments, the device further includes: a control module for:

[0138] In response to the vehicle state not satisfying the start condition, not sending or stopping sending the start signal through the vehicle controller;

[0139] Stop sending wake-up signals and battery thermal management requests through the battery management system;

[0140] Controls the battery management system to enter sleep mode.

[0141] In some embodiments, the setting range is 20°C-40°C.

[0142] In some embodiments, the start-up condition includes: the power battery state of charge (SOC) ≥ 8%.

[0143] Please refer to Figure 7, which shows a block diagram of a computer device 700 according to an exemplary embodiment of the present application. The computer device 700 includes a central processing unit (CPU) 701, a system memory 704 including a random access memory (RAM) 702 and a read-only memory (ROM) 703, and a system bus 705 connecting the system memory 704 and the CPU 701. The computer device 700 also includes a mass storage device 706 for storing an operating system 709, application programs 710, and other program modules 711.

[0144] The mass storage device 706 is connected to the central processing unit 701 via a mass storage controller (not shown) connected to the system bus 705. The mass storage device 706 and its associated computer-readable media provide non-volatile storage for the computer device 700. In other words, the mass storage device 706 may include a computer-readable medium (not shown) such as a hard disk or a Compact Disc Read-Only Memory (CD-ROM) drive.

[0145] Without loss of generality, the computer-readable medium may include computer storage media and communication media. Computer storage media include volatile and non-volatile, removable and non-removable media implemented by any method or technology for storing information such as computer-readable instructions, data structures, program modules or other data. Computer storage media include RAM, ROM, Erasable Programmable Read Only Memory (EPROM), Electronically Erasable Programmable Read-Only Memory (EEPROM), flash memory or other solid-state storage technology, CD-ROM, Digital Versatile Disc (DVD) or other optical storage, tape cassettes, magnetic tape, disk storage or other magnetic storage devices. Of course, those skilled in the art will appreciate that the computer storage medium is not limited to the above-mentioned ones. The above-mentioned system memory 704 and mass storage device 706 can be collectively referred to as memory.

[0146] According to various embodiments of the present disclosure, the computer device 700 may also be connected to a remote computer on a network such as the Internet for operation. That is, the computer device 700 may be connected to the network 708 via the network interface unit 707 connected to the system bus 705, or the network interface unit 707 may be used to connect to other types of networks or remote computer systems (not shown).

[0147] The memory further includes at least one computer program, which is stored in the memory. The central processing unit 701 implements all or part of the steps in the methods shown in the above embodiments by executing the at least one computer program.

[0148] In an exemplary embodiment, a chip is also provided. The chip includes a programmable logic circuit and / or program instructions. When the chip is run on a computer device, it is used to implement the temperature processing method for a power battery in the above aspect.

[0149] In an exemplary embodiment, a computer program product is also provided. The computer program product includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions to implement the temperature management method for a power battery provided in each of the above method embodiments.

[0150] In an exemplary embodiment, a computer-readable storage medium is further provided, in which a computer program is stored. The computer program is loaded and executed by a processor to implement the temperature processing method for a power battery provided by each of the above method embodiments.

[0151] Those skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware, or by a program to instruct the relevant hardware, and the program may be stored in a computer-readable storage medium, which may be a read-only memory, a disk, or an optical disk, etc.

[0152] Those skilled in the art will appreciate that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any media that facilitates the transmission of computer programs from one place to another. The storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0153] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A temperature treatment method for a power battery, wherein: The method comprises: Wake up the battery management system through the clock chip; In response to the temperature of the power battery not meeting the set range, sending a wake-up signal and a battery thermal management request to the vehicle controller through the communication chip of the battery management system; the wake-up signal is used to wake up the vehicle controller; In response to the vehicle state satisfying the start-up condition, starting the battery thermal management system through the vehicle controller; In response to the temperature of the power battery satisfying the set range, the battery management system stops sending the wake-up signal and the battery thermal management request, and controls the battery management system to enter a sleep state.

2. The method according to claim 1, wherein: The battery management system is awakened by the clock chip, including: In response to a set condition being met, the battery management system is awakened at a fixed time by the clock chip; the set condition includes that the battery management system is in a dormant state and the ambient temperature of the vehicle does not meet a specific range.

3. The method according to claim 1 or 2, wherein: In response to the vehicle state satisfying the start-up condition, starting the battery thermal management system through the vehicle controller includes: In response to the vehicle state satisfying the start condition, sending a start signal to the battery thermal management system through the vehicle controller; The battery thermal management system receives the start signal and starts working.

4. The method according to claim 3, wherein: The method further comprises: In response to the vehicle state not satisfying the start condition, not sending or stopping sending the start signal through the vehicle controller; Stop sending the wake-up signal and the battery thermal management request by the battery management system; Control the battery management system to enter the sleep state.

5. The method according to claim 1 or 2, wherein: The setting range is 20°C-40°C.

6. The method according to claim 1 or 2, wherein: The starting conditions include: the power battery state of charge SOC ≥ 8%.

7. A temperature treatment device for a power battery, wherein: The device comprises: The wake-up module is used to wake up the battery management system through the clock chip; A sending module, configured to send a wake-up signal and a battery thermal management request to a vehicle controller through a communication chip of the battery management system in response to the temperature of the power battery not meeting a set range; the wake-up signal is used to wake up the vehicle controller; A starting module, configured to start the battery thermal management system through the vehicle controller in response to the vehicle state satisfying the starting condition; The stopping module is used for stopping sending the wake-up signal and the battery thermal management request through the battery management system in response to the temperature of the power battery meeting the set range, and controlling the battery management system to enter a dormant state.

8. A computer device, wherein: The computer device includes a processor and a memory, wherein the memory stores at least one computer instruction, and the at least one computer instruction is loaded and executed by the processor to implement the temperature processing method for a power battery according to any one of claims 1 to 6.

9. A computer-readable storage medium, wherein: The computer-readable storage medium stores at least one computer instruction, and the computer instruction is loaded and executed by the processor to implement the temperature processing method for a power battery according to any one of claims 1 to 6.

10. A computer program product, wherein: The computer program product includes computer instructions, which are stored in a computer-readable storage medium; the computer instructions are read and executed by a processor of a computer device to implement the temperature processing method for a power battery as described in any one of claims 1 to 6.

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