Battery thermal runaway control method and device, electronic equipment and storage medium

Abstract

The invention provides a battery thermal runaway control method and device, electronic equipment and a computer readable storage medium. The battery thermal runaway control method comprises the steps that a target battery pack with thermal runaway in a power battery is determined; detecting whether the fuel cell is in a starting state; when it is detected that the fuel cell is in the starting state, the fuel cell is controlled to provide voltage for an air conditioner heat management system of the vehicle, and the air conditioner heat management system is controlled to cool the target battery pack; under the condition that it is detected that the fuel cell is not in the starting state, a normal battery pack without thermal runaway in the power battery is controlled to provide power for the fuel cell, and after it is detected that the fuel cell is in the starting state, the fuel cell is controlled to provide voltage for the air conditioner thermal management system; and the air conditioner heat management system is controlled to cool the target battery pack. The thermal management efficiency of the battery can be improved, and the use safety of the vehicle battery is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy vehicles, and particularly relates to a battery thermal runaway control method and device, an electronic device and a storage medium. BACKGROUND

[0002] Hydrogen fuel cell vehicles can provide power to the vehicle through fuel cells and auxiliary power sources (power batteries) in series or parallel. Under the background of increasing energy density of power batteries and expanding application scale, new energy vehicles have occurred due to fire accidents caused by thermal runaway of lithium ion batteries. Thermal runaway may occur in single cells due to electrical, thermal and mechanical abuse, etc. and is accompanied by a process of severe heat and gas production. If effective measures are not taken to isolate or cool the runaway cells, heat will also be transferred to adjacent cells, causing continuous thermal runaway spread in the module, high-temperature smoke damaging the insulation protection in the battery pack, and then causing serious accidents such as arc ignition.

[0003] The power battery system of a hydrogen fuel cell vehicle generally uses one or more battery packs in series and parallel to meet different energy configuration needs. For power batteries with large capacity, the energy released by thermal runaway and the damage caused are more severe. The prior art cuts off the high voltage of the vehicle after the battery thermal runaway to avoid the runaway battery from continuing to charge and discharge to produce heat and accelerate the thermal runaway evolution process. Due to the lack of power source, the thermal management cooling system cannot operate, and the heat generated by the battery thermal runaway cannot be effectively removed in time, resulting in continuous thermal runaway spread.

[0004] Therefore, there is an urgent need for a new battery thermal runaway control method to solve the above problems. SUMMARY

[0005] Therefore, the present application provides a battery thermal runaway control method and device, an electronic device and a storage medium, which can improve the thermal management efficiency of the battery and ensure the safety of the vehicle battery.

[0006] A first aspect of this application provides a battery thermal runaway control method applied to a vehicle, the vehicle including a power battery and a fuel cell, both the power battery and the fuel cell being used to provide power to the vehicle, the power battery including multiple battery packs; the method includes: identifying a target battery pack in the power battery where thermal runaway has occurred; detecting whether the fuel cell is in a startup state; if the fuel cell is detected to be in a startup state, controlling the fuel cell to provide voltage to the vehicle's air conditioning thermal management system, and controlling the air conditioning thermal management system to cool down the target battery pack; if the fuel cell is detected not to be in a startup state, controlling a normal battery pack in the power battery that has not experienced thermal runaway to provide power to the fuel cell; and after the fuel cell is detected to be in a startup state, controlling the fuel cell to provide voltage to the air conditioning thermal management system, and controlling the air conditioning thermal management system to cool down the target battery pack.

[0007] In one possible implementation, the vehicle includes multiple coolant flow branches, each coolant flow branch containing at least one battery pack, and each coolant flow branch is equipped with a solenoid valve; controlling the air conditioning thermal management system to cool the target battery pack includes: controlling the target solenoid valve of the target coolant flow branch to close, and controlling the solenoid valves of other coolant flow branches to open, wherein the target coolant flow branch is the branch where the target battery pack is located.

[0008] In one possible implementation, the vehicle further includes a water pump, a heat exchanger, and a water tank; the water pump and the heat exchanger are both located in the main confluence circuit of multiple coolant flow branches, the water tank is connected to the water pump, and the water tank stores coolant; after the target solenoid valve of the target coolant flow branch is closed and the solenoid valves of other coolant flow branches are opened, the system further includes: controlling the water pump to operate so that the water pump pumps the coolant into the target coolant flow branch; and controlling the air conditioning thermal management system to operate so that the air conditioning thermal management system cools the coolant through the heat exchanger.

[0009] In one possible implementation, before determining the target battery pack in the power battery where thermal runaway occurs, the method further includes: acquiring battery characteristic parameters of the power battery at preset intervals during the vehicle's operation; determining the target battery pack in the power battery where thermal runaway occurs includes: determining the target battery pack in the power battery where thermal runaway occurs based on the battery characteristic parameters.

[0010] In one possible implementation, the battery characteristic parameters include one or any combination of the following: the current cell temperature, the current cell voltage, and the current air pressure of each battery pack.

[0011] In one possible implementation, after detecting that the fuel cell is in a startup state, the method further includes: controlling the power battery to disconnect.

[0012] In one possible implementation, the vehicle further includes a high-voltage bus, to which both the power battery and the fuel cell are electrically connected, and the high-voltage bus is electrically connected to the air conditioning thermal management system. The system controls the normal battery pack in the power battery (which has not experienced thermal runaway) to provide power to the fuel cell. Upon detecting that the fuel cell is in a startup state, the system controls the fuel cell to provide voltage to the air conditioning thermal management system, including controlling the normal battery pack to provide power to the fuel cell through the high-voltage bus. Upon detecting that the fuel cell is in a startup state, the system controls the fuel cell to supply voltage to the air conditioning thermal management system through the high-voltage bus.

[0013] Secondly, embodiments of this application also provide a battery thermal runaway control device applied to a vehicle, the vehicle including a power battery and a fuel cell, both of which provide power to the vehicle, the power battery including multiple battery packs; the device including a determination module, a detection module, and a control module; the determination module is used to determine the target battery pack in the power battery where thermal runaway has occurred; the detection module is used to detect whether the fuel cell is in a startup state; when the detection module detects that the fuel cell is in a startup state, the control module is used to control the fuel cell to provide voltage to the vehicle's air conditioning thermal management system, and control the air conditioning thermal management system to cool down the target battery pack; when the detection module detects that the fuel cell is not in a startup state, the control module is used to control the normal battery packs in the power battery that have not experienced thermal runaway to provide power to the fuel cell, and after detecting that the fuel cell is in a startup state, control the fuel cell to provide voltage to the air conditioning thermal management system, and control the air conditioning thermal management system to cool down the target battery pack.

[0014] Thirdly, embodiments of this application also provide an electronic device, the electronic device including a processor and a memory, the memory being used to store instructions, and the processor being used to call the instructions in the memory, causing the electronic device to execute the battery thermal runaway control method as described in the first aspect.

[0015] Fourthly, embodiments of this application also provide a computer-readable storage medium storing computer instructions that, when executed on an electronic device, cause the electronic device to perform the battery thermal runaway control method as described in the first aspect.

[0016] Compared with related technologies, the embodiments of this application have at least the following advantages: By detecting whether the fuel cell is in a running state after identifying the target battery pack in the power battery that has experienced thermal runaway, the fuel cell can be directly controlled to supply voltage to the air conditioning thermal management system when it is in a running state. The air conditioning thermal management system cools down the target battery pack, improving the thermal management efficiency of the battery, reducing the risk of fire and explosion of the thermally runaway battery pack and the risk of thermal runaway propagation from adjacent battery packs, and avoiding the situation where "due to the lack of a power source, the air conditioning thermal management system cannot operate, and the heat generated by the thermal runaway of the target battery pack cannot be effectively removed in time"; and by not supplying voltage to the air conditioning thermal management system through the normal battery pack in the power battery that has not experienced thermal runaway, the continuous operation of the power battery can effectively prevent more battery packs from experiencing thermal runaway, ensuring the safety of vehicle battery use. In addition, when it is detected that the fuel cell is not in a running state, controlling the normal battery pack in the power battery that has not experienced thermal runaway to supply power to the fuel cell allows the fuel cell to enter a running state more quickly, thereby providing voltage to the air conditioning thermal management system and cooling down the target battery pack more quickly, further improving the thermal management efficiency of the battery.

[0017] The technical effects achieved by the second, third, and fourth aspects mentioned above are similar to those achieved by the corresponding technical means in the first aspect, and will not be repeated here. Attached Figure Description

[0018] Figure 1 A flowchart illustrating the steps of a battery thermal runaway control method provided in an embodiment of this application; Figure 2 A schematic diagram of energy flow for a battery thermal runaway control method provided in an embodiment of this application; Figure 3 Another flowchart of the battery thermal runaway control method provided in an embodiment of this application; Figure 4 This is a schematic diagram of the working principle of a power battery cooling circuit provided in an embodiment of this application; Figure 5 A schematic diagram of the functional modules of a battery thermal runaway control device provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] The following description sets forth many specific details to provide a full understanding of this application. The described embodiments are only some, not all, of the embodiments of this application.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0022] It should be further noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0023] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and drawings of this application are used to distinguish similar objects, not to describe a specific order or sequence.

[0024] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0025] For ease of understanding, some concepts related to the embodiments of this application are illustrated and explained by way of example for reference.

[0026] Battery thermal runaway refers to an uncontrollable phenomenon during battery charging, discharging, or use where internal or external factors cause a rapid rise in temperature, triggering a chain reaction of exothermic reactions that may ultimately lead to combustion or explosion.

[0027] A power battery is a rechargeable energy storage device that provides power to vehicles such as electric cars and electric trains. Its core function is to convert chemical energy into electrical energy to drive the motor. A power battery consists of multiple battery packs connected in series and parallel, integrating a BMS (Battery Management System) and thermal management.

[0028] A fuel cell is a device that directly converts the chemical energy of fuel (such as hydrogen) and oxidant (such as oxygen) into electrical energy through an electrochemical reaction. It is essentially an energy conversion device rather than an energy storage device.

[0029] Plate heat exchangers are high-efficiency heat exchange devices made of stacked corrugated metal plates. They achieve heat exchange between hot and cold fluids through thin rectangular channels between the plates. Their core features include: the use of corrugated plates (herringbone / horizontal corrugation / nodular shape) made of materials such as stainless steel and titanium alloy, with flow channels formed by vacuum brazing or bolting.

[0030] A Battery Management System (BMS) is primarily used to monitor, manage, and protect rechargeable battery packs, ensuring their safe and efficient operation. The BMS acts as the battery pack's "intelligent manager," monitoring parameters such as voltage, current, and temperature in real time to prevent risks like overcharging, over-discharging, and short circuits, thereby extending battery life and optimizing performance.

[0031] The Vehicle Control Unit (VCU) is the core electronic control unit of an electric vehicle, responsible for coordinating and managing the operation of various vehicle subsystems, similar in function to the engine management system in a traditional gasoline-powered vehicle. The VCU connects to the motor controller, battery management system, and other components via a CAN bus, enabling data exchange and fault diagnosis.

[0032] Please refer to Figure 1 , Figure 1 This is a flowchart illustrating the steps of an embodiment of the battery thermal runaway control method of this application. Depending on different requirements, the order of the steps in this flowchart can be changed, and some steps can be omitted.

[0033] It should be noted that the battery thermal runaway control method in this application embodiment is applied in a vehicle starting scenario. The executing entity can be a battery thermal runaway control device. For example, during vehicle operation, the battery thermal runaway control device can determine the target battery pack experiencing thermal runaway and perform cooling treatment on the target battery pack. Of course, the battery thermal runaway control method can also be applied to other scenarios requiring battery thermal runaway control, and this application does not specifically limit its application in this regard.

[0034] The specific process of this embodiment is as follows: Figure 1 As shown, it includes the following steps: S101, Identify the target battery pack in the power battery that has experienced thermal runaway.

[0035] Specifically, the vehicle in this embodiment includes a power battery and a fuel cell, both of which are used to provide power to the vehicle. The power battery includes multiple battery packs.

[0036] In some embodiments, before determining the target battery pack in the power battery where thermal runaway occurs, the method further includes: acquiring battery characteristic parameters of the power battery at preset intervals during vehicle operation; determining the target battery pack in the power battery where thermal runaway occurs includes: determining the target battery pack in the power battery where thermal runaway occurs based on the battery characteristic parameters.

[0037] In some embodiments, the preset duration is not specifically limited and can be set according to actual needs. For example, the preset duration can be set to 0, 1 second, 10 seconds, etc. It can be understood that when the preset duration is set to 0, the battery characteristic parameters of the power battery are acquired in real time.

[0038] In some embodiments, battery characteristic parameters include one or any combination of the following: the current cell temperature, the current cell voltage, and the current air pressure of each battery pack.

[0039] To facilitate understanding, the following example uses the current temperature and preset duration of each battery pack as the battery characteristic parameters to illustrate how the target battery pack is determined in this embodiment: During vehicle operation, the battery management system acquires the current cell temperature of each battery pack in real time. When a battery pack has a current temperature greater than a preset temperature threshold and a duration exceeding a preset duration threshold, the battery pack is detected as the target battery pack, and the battery management system sends a battery thermal runaway signal to the vehicle controller.

[0040] S102, Detect whether the fuel cell is in the start-up state. If the fuel cell is detected to be in the start-up state, proceed to step S103; otherwise, proceed to step S104.

[0041] In some embodiments, after receiving a battery thermal runaway signal, the vehicle controller detects whether the fuel cell is in the start-up state.

[0042] S103 controls the fuel cell to supply voltage to the vehicle's air conditioning thermal management system and controls the air conditioning thermal management system to cool the target battery pack.

[0043] S104: Control the normal battery pack in the power battery that has not experienced thermal runaway to provide power to the fuel cell. After detecting that the fuel cell is in the start-up state, execute step S103.

[0044] In some embodiments, after detecting that the fuel cell is in a startup state, the vehicle controller and the battery management system jointly control the high voltage of the power battery to cut off the power, so as to prevent it from continuing to charge and discharge and causing thermal runaway to worsen.

[0045] In some embodiments, the vehicle further includes a high-voltage bus, to which both the power battery and the fuel cell are electrically connected, and the high-voltage bus is electrically connected to the air conditioning thermal management system; controlling the normal battery pack in the power battery that has not experienced thermal runaway to provide power to the fuel cell; and controlling the fuel cell to provide voltage to the air conditioning thermal management system after detecting that the fuel cell is in a startup state, including: controlling the normal battery pack to provide power to the fuel cell through the high-voltage bus; and controlling the fuel cell to supply power to the air conditioning thermal management system through the high-voltage bus after detecting that the fuel cell is in a startup state.

[0046] To facilitate understanding, the following will be combined with... Figure 2 This embodiment provides a detailed explanation of how the target battery pack achieves cooling. Please refer to Figure 2 This is a schematic diagram of energy flow in the battery thermal runaway control method provided in the embodiments of this application.

[0047] 1. When the vehicle controller detects that the fuel cell is in the starting state, the vehicle controller and battery management system control the high-voltage power supply of the power battery pack to disconnect, and the vehicle controller controls the fuel cell to directly supply power to the air conditioning thermal management system (i.e., Figure 2 The cooling system shown is powered by a cooling system that cools the target battery pack.

[0048] 2. When the vehicle controller detects that the fuel cell is not in the start-up state, the vehicle controller sends a fuel cell start command to the power battery. The power battery provides power for the fuel cell to start through the high-voltage bus. The fuel cell generates electricity to supply power to the cooling system, and the cooling system cools down the target battery pack.

[0049] Understandable Figure 2The cooling system shown includes an air conditioning compressor. In practical applications, the type of battery cooling system is not specifically limited. The cooling system may include at least one of air cooling, liquid cooling or direct cooling systems. In this application, air cooling refers to a heat dissipation method that uses air as a medium to cool the battery. Liquid cooling is a heat dissipation method that uses liquid medium for convection heat transfer. Direct cooling refers to a heat dissipation method that uses the latent heat of vaporization of refrigerant to cool the battery system.

[0050] It should also be noted that after the fuel cell supplies power to the air conditioning thermal management system, the battery management system detects that the temperature of the target battery pack is lower than the preset temperature threshold and the duration exceeds the preset duration threshold. This indicates that the target battery pack has returned to the normal operating temperature and the thermal runaway propagation has stopped. The vehicle controller receives the cooling stop request from the battery management system and controls the vehicle to shut down.

[0051] In addition, to prevent users from powering off the vehicle during the thermal runaway cooling process or continuing to use the vehicle after the battery temperature returns to normal, the vehicle controller prompts users to delay powering off and move away from the vehicle via audible and visual instruments during the thermal runaway fault mode.

[0052] Compared with related technologies, the embodiments of this application have at least the following advantages: By detecting whether the fuel cell is in a running state after identifying the target battery pack in the power battery that has experienced thermal runaway, the fuel cell can be directly controlled to supply voltage to the air conditioning thermal management system when it is in a running state. The air conditioning thermal management system cools down the target battery pack, improving the thermal management efficiency of the battery, reducing the risk of fire and explosion of the thermally runaway battery pack and the risk of thermal runaway propagation from adjacent battery packs, and avoiding the situation where "due to the lack of a power source, the air conditioning thermal management system cannot operate, and the heat generated by the thermal runaway of the target battery pack cannot be effectively removed in time"; and by not supplying voltage to the air conditioning thermal management system through the normal battery pack in the power battery that has not experienced thermal runaway, the continuous operation of the power battery can effectively prevent more battery packs from experiencing thermal runaway, ensuring the safety of vehicle battery use. In addition, when it is detected that the fuel cell is not in a running state, controlling the normal battery pack in the power battery that has not experienced thermal runaway to supply power to the fuel cell allows the fuel cell to enter a running state more quickly, thereby providing voltage to the air conditioning thermal management system and cooling down the target battery pack more quickly, further improving the thermal management efficiency of the battery.

[0053] Please refer to Figure 3 , Figure 3 This is a flowchart illustrating the steps of an embodiment of the battery thermal runaway control method of this application. Depending on different requirements, the order of the steps in this flowchart can be changed, and some steps can be omitted. This battery thermal runaway control method can be applied to the aforementioned battery thermal runaway control device, but is not limited thereto, and the embodiments of this application do not limit it in this regard.

[0054] This embodiment is a detailed description of the foregoing embodiments, mainly illustrating a method for cooling a target battery pack. This method improves the cooling efficiency of the target battery pack, thereby further ensuring the safety of vehicle battery use.

[0055] In this embodiment, the vehicle includes multiple coolant flow branches, each coolant flow branch contains at least one battery pack, and each coolant flow branch is equipped with a solenoid valve; the vehicle also includes a water pump, a heat exchanger, and a water tank; the water pump and heat exchanger are both located in the main circuit of the multiple coolant flow branches, the water tank is connected to the water pump, and the water tank stores coolant.

[0056] The specific process of this embodiment is as follows: Figure 3 As shown, it includes the following steps: S301, Identify the target battery pack in the power battery that has experienced thermal runaway.

[0057] S302, Detect whether the fuel cell is in the start-up state. If the fuel cell is detected to be in the start-up state, proceed to step S303; otherwise, proceed to step S305.

[0058] S303 controls the fuel cell to supply voltage to the vehicle's air conditioning thermal management system, controls the target solenoid valve of the target coolant flow branch to close, and controls the solenoid valves of other coolant flow branches to open.

[0059] Specifically, the target coolant flow branch is the branch where the target battery pack is located.

[0060] S304 controls the operation of the water pump so that the water pump pumps the coolant into the target coolant flow branch; controls the operation of the air conditioning thermal management system so that the air conditioning thermal management system cools the coolant through the heat exchanger.

[0061] S305, control the normal battery pack in the power battery that has not experienced thermal runaway to provide power to the fuel cell. After detecting that the fuel cell is in the start-up state, execute step S303.

[0062] To facilitate understanding, the following section uses an air conditioning thermal management system as an example of an air conditioning system, combined with... Figure 4 This embodiment provides a detailed explanation of how the target battery pack achieves cooling. Please refer to Figure 4 This is a schematic diagram of the working principle of the power battery cooling circuit provided in the embodiments of this application. Figure 4The power battery shown consists of three battery packs: power battery 1, power battery 2, and power battery 3. Power battery 1 and solenoid valve 1 are located in the same coolant flow branch, power battery 2 and solenoid valve 2 are located in the same coolant flow branch, and power battery 3 and solenoid valve 3 are located in the same coolant flow branch.

[0063] Figure 4 An electric water pump is installed on the main flow circuit of the coolant flow branch shown, and the electric water pump is connected to a water tank (not shown in the figure). A plate heat exchanger is also installed on the main flow circuit, and a transmission channel is provided between the air conditioning system and the plate heat exchanger.

[0064] During vehicle operation, assuming the battery management system detects thermal runaway in battery 1 while batteries 2 and 3 remain normal, the battery management system sends a thermal runaway signal to the vehicle controller. Upon receiving the signal, the vehicle controller closes solenoid valve 1 and opens solenoid valves 2 and 3. The controller also activates an electric water pump to pump coolant from the radiator into the coolant flow path of battery 1. Simultaneously, the air conditioning system operates, cooling the coolant via a plate heat exchanger. This cooling effect, as the coolant flows through the coolant flow path, further cools battery 1. This design provides an effective thermal management strategy, cooling only the battery pack experiencing thermal runaway, preventing excessively low cell temperatures in the non-runaway battery packs. This allows the water-cooled unit to operate for longer periods, ensuring battery safety while maximizing the use of available energy.

[0065] It should be understood that, Figure 4 The example shown illustrates a vehicle with three battery packs. The number of solenoid valves can be adjusted based on the actual number of battery packs in the vehicle. The on / off state of each branch in the battery cooling circuit can be achieved using solenoid valves, electric ball valves, electric butterfly valves, etc., and this embodiment does not limit this.

[0066] Compared with related technologies, the embodiments of this application have at least the following advantages: By detecting whether the fuel cell is in a running state after identifying the target battery pack in the power battery that has experienced thermal runaway, the fuel cell can be directly controlled to supply voltage to the air conditioning thermal management system when it is in a running state. The air conditioning thermal management system cools down the target battery pack, improving the thermal management efficiency of the battery, reducing the risk of fire and explosion of the thermally runaway battery pack and the risk of thermal runaway propagation from adjacent battery packs, and avoiding the situation where "due to the lack of a power source, the air conditioning thermal management system cannot operate, and the heat generated by the thermal runaway of the target battery pack cannot be effectively removed in time"; and by not supplying voltage to the air conditioning thermal management system through the normal battery pack in the power battery that has not experienced thermal runaway, the continuous operation of the power battery can effectively prevent more battery packs from experiencing thermal runaway, ensuring the safety of vehicle battery use. In addition, when it is detected that the fuel cell is not in a running state, controlling the normal battery pack in the power battery that has not experienced thermal runaway to supply power to the fuel cell allows the fuel cell to enter a running state more quickly, thereby providing voltage to the air conditioning thermal management system and cooling down the target battery pack more quickly, further improving the thermal management efficiency of the battery.

[0067] Based on the same concept as the battery thermal runaway control method in the above embodiments, this application also provides a battery thermal runaway control device, which can be used to execute the above-described battery thermal runaway control method. For ease of explanation, the structural schematic diagram of the battery thermal runaway control device embodiment only shows the parts related to the embodiments of this application. Those skilled in the art will understand that the illustrated structure does not constitute a limitation on the device, and it may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0068] like Figure 5 As shown, the battery thermal runaway control device 50 includes a determination module 501, a detection module 502, and a control module 503. In some embodiments, the above modules can be programmable software instructions stored in memory and executable by a processor. It is understood that in other embodiments, the above modules can also be program instructions or firmware embedded in the processor.

[0069] The determination module 501 is used to determine the target battery pack in the power battery that has experienced thermal runaway; Detection module 502 is used to detect whether the fuel cell is in the start-up state; When the detection module 502 detects that the fuel cell is in the start-up state, the control module 503 controls the fuel cell to provide voltage to the vehicle's air conditioning thermal management system and controls the air conditioning thermal management system to cool down the target battery pack. If the detection module 502 detects that the fuel cell is not in the start-up state, the control module 503 controls the normal battery pack in the power battery that has not experienced thermal runaway to provide power to the fuel cell. After detecting that the fuel cell is in the start-up state, the control module controls the fuel cell to provide voltage to the air conditioning thermal management system and controls the air conditioning thermal management system to cool down the target battery pack.

[0070] The battery thermal runaway control device 50 provided in the above embodiments can realize the technical solutions described in the above battery thermal runaway control method embodiments. The specific implementation principles of each module or unit can be found in the corresponding content in the above battery thermal runaway control method embodiments, and will not be repeated here.

[0071] Please refer to Figure 6 , Figure 6 This is a schematic diagram of an embodiment of the electronic device of this application. In this embodiment of the invention, the electronic device 600 includes a processor 601, a memory 602, and a display 603. Figure 6 Only some components of the electronic device 600 are shown, but it should be understood that it is not required to implement all the components shown, and more or fewer components may be implemented instead.

[0072] In some embodiments, processor 601 may be a central processing unit (CPU), microprocessor, or other data processing chip, used to run program code stored in memory 602 or process data, such as the battery thermal runaway control method of the present invention.

[0073] In some embodiments, processor 601 may be a single server or a group of servers. The server group may be centralized or distributed. In some embodiments, processor 601 may be local or remote. In some embodiments, processor 601 may be implemented on a cloud platform. In one embodiment, the cloud platform may include a private cloud, public cloud, hybrid cloud, community cloud, distributed cloud, intranet, multi-cloud, etc., or any combination thereof.

[0074] In some embodiments, memory 602 may be an internal storage unit of electronic device 600, such as a hard disk or memory of electronic device 600. In other embodiments, memory 602 may also be an external storage device of electronic device 600, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc. equipped on electronic device 600.

[0075] Furthermore, the memory 602 may include both internal storage units of the electronic device 600 and external storage devices. The memory 602 is used to store application software and various types of data installed on the electronic device 600.

[0076] In some embodiments, display 603 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen. Display 603 is used to display information from electronic device 600 and to display visual user applications. Components 601-603 of electronic device 600 communicate with each other via a system bus.

[0077] In one embodiment, when processor 601 executes the battery thermal runaway control program in memory 602, the following steps can be implemented: Identify the target battery pack in the power battery that has experienced thermal runaway; Detect whether the fuel cell is in the start-up state; When the fuel cell is detected to be in the start-up state, the fuel cell is controlled to provide voltage to the vehicle's air conditioning thermal management system, and the air conditioning thermal management system is controlled to cool down the target battery pack. If the fuel cell is not detected to be in the start-up state, the normal battery pack in the power battery that has not experienced thermal runaway is controlled to provide power to the fuel cell. After the fuel cell is detected to be in the start-up state, the fuel cell is controlled to provide voltage to the air conditioning thermal management system, and the air conditioning thermal management system is controlled to cool down the target battery pack.

[0078] It should be understood that when the processor 601 executes the battery thermal runaway control program in the memory 602, in addition to the functions mentioned above, it can also perform other functions, as detailed in the description of the corresponding method embodiments above.

[0079] Furthermore, this embodiment of the invention does not specifically limit the type of electronic device 600 mentioned. Electronic device 600 can be a mobile phone, tablet computer, personal digital assistant (PDA), wearable device, laptop computer, or other portable electronic device. Exemplary embodiments of portable electronic devices include, but are not limited to, portable electronic devices running iOS, Android, Microsoft, or other operating systems. The aforementioned portable electronic device can also be other portable electronic devices, such as a laptop computer with a touch-sensitive surface (e.g., a touch panel). It should also be understood that in some other embodiments of the invention, electronic device 600 may not be a portable electronic device, but rather a desktop computer with a touch-sensitive surface (e.g., a touch panel).

[0080] Furthermore, in this embodiment of the invention, the type of electronic device 600 mentioned is preferably an automotive electronic control unit (ECU) or a vehicle controller (VCU). This embodiment does not specifically limit the type of electronic device 600, and it can be set according to actual needs.

[0081] Accordingly, this application also provides a computer-readable storage medium for storing a computer-readable program or instruction. When the program or instruction is executed by a processor, it can implement the steps or functions of the battery thermal runaway control method provided in the above-described method embodiments.

[0082] Those skilled in the art will understand that all or part of the processes of the methods described in the above embodiments can be implemented by a computer program instructing related hardware (such as a processor, controller, etc.), and the computer program can be stored in a computer-readable storage medium. The computer-readable storage medium may be a disk, optical disk, read-only memory, or random access memory, etc.

[0083] The battery thermal runaway control method, apparatus, electronic device, and computer-readable storage medium provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A battery thermal runaway control method, characterized in that, The invention is applied to a vehicle, which includes a power battery and a fuel cell, both of which are used to provide power to the vehicle, and the power battery includes multiple battery packs. The method includes: Identify the target battery pack in the power battery that has experienced thermal runaway; Detect whether the fuel cell is in the start-up state; When the fuel cell is detected to be in the start-up state, the fuel cell is controlled to provide voltage to the vehicle's air conditioning thermal management system, and the air conditioning thermal management system is controlled to cool down the target battery pack. If the fuel cell is not detected to be in the start-up state, the normal battery pack in the power battery that has not experienced thermal runaway is controlled to provide power to the fuel cell. After the fuel cell is detected to be in the start-up state, the fuel cell is controlled to provide voltage to the air conditioning thermal management system, and the air conditioning thermal management system is controlled to cool down the target battery pack.

2. The battery thermal runaway control method according to claim 1, characterized in that, The vehicle includes multiple coolant flow branches, each coolant flow branch contains at least one of the battery packs, and each coolant flow branch is equipped with a solenoid valve. The control of the air conditioning thermal management system to cool the target battery pack includes: The target solenoid valve of the target coolant flow branch is closed, and the solenoid valves of other coolant flow branches are opened, wherein the target coolant flow branch is the branch where the target battery pack is located.

3. The battery thermal runaway control method according to claim 2, characterized in that, The vehicle also includes a water pump, a heat exchanger, and a water tank; the water pump and the heat exchanger are both located in the main circuit of multiple coolant flow branches, the water tank is connected to the water pump, and the water tank stores coolant. After the target solenoid valve controlling the target coolant flow branch is closed, and the solenoid valves controlling other coolant flow branches are opened, the method further includes: Control the operation of the water pump so that the water pump pumps the coolant into the target coolant flow branch; Control the operation of the air conditioning thermal management system so that the air conditioning thermal management system cools the coolant through the heat exchanger.

4. The battery thermal runaway control method according to claim 1, characterized in that, Before determining the target battery pack in the power battery where thermal runaway has occurred, the method further includes: During the operation of the vehicle, the battery characteristic parameters of the power battery are acquired at preset intervals. Identifying the target battery pack in the power battery where thermal runaway has occurred includes: The target battery pack in the power battery that experiences thermal runaway is determined based on the battery characteristic parameters.

5. The battery thermal runaway control method according to claim 4, characterized in that, The battery characteristic parameters include one or any combination of the following: The current cell temperature, current cell voltage, and current air pressure of each of the battery packs.

6. The battery thermal runaway control method according to claim 1, characterized in that, After detecting that the fuel cell is in a startup state, the method further includes: Control the power battery to disconnect.

7. The battery thermal runaway control method according to any one of claims 1 to 6, characterized in that, The vehicle also includes a high-voltage bus, and the power battery and the fuel cell are both electrically connected to the high-voltage bus. The high-voltage bus is also electrically connected to the air conditioning thermal management system. The control of the normal battery pack in the power battery that has not experienced thermal runaway to provide power to the fuel cell, and the control of the fuel cell to provide voltage to the air conditioning thermal management system after detecting that the fuel cell is in a startup state, including: The normal battery pack is controlled to provide power to the fuel cell via the high-voltage bus; After detecting that the fuel cell is in the start-up state, the system controls the fuel cell to supply power to the air conditioning thermal management system through the high-voltage bus.

8. A battery thermal runaway control device, characterized in that, The invention is applied to a vehicle, which includes a power battery and a fuel cell, both of which are used to provide power to the vehicle, and the power battery includes multiple battery packs. The device includes a determination module, a detection module, and a control module; The determining module is used to determine the target battery pack in the power battery that has experienced thermal runaway; The detection module is used to detect whether the fuel cell is in the start-up state; When the detection module detects that the fuel cell is in the start-up state, the control module is used to control the fuel cell to provide voltage to the vehicle's air conditioning thermal management system, and to control the air conditioning thermal management system to cool down the target battery pack. If the detection module detects that the fuel cell is not in the start-up state, the control module controls the normal battery pack in the power battery that has not experienced thermal runaway to provide power to the fuel cell. After detecting that the fuel cell is in the start-up state, the control module controls the fuel cell to provide voltage to the air conditioning thermal management system and controls the air conditioning thermal management system to cool down the target battery pack.

9. An electronic device, the electronic device comprising a processor and a memory, characterized in that, The memory is used to store instructions, and the processor is used to call the instructions in the memory to cause the electronic device to execute the battery thermal runaway control method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed on an electronic device, cause the electronic device to perform the battery thermal runaway control method as described in any one of claims 1 to 7.

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