Vehicle control method and device and readable storage medium

Abstract

The invention discloses a vehicle control method and device and a readable storage medium, and relates to the technical field of new energy vehicles. The control method of the vehicle comprises the steps that when it is detected that a first battery cell is in thermal runaway and the voltage of the first battery cell is larger than preset voltage, a first discharging loop is controlled to conduct discharging treatment on the first battery cell, a liquid cooling device is controlled to conduct cooling treatment on the first battery cell, the first battery cell is any one of multiple battery cells, and the first discharging loop is connected with the liquid cooling device; the first discharge loop is a discharge loop corresponding to the first battery cell; detecting thermal diffusion conditions among the plurality of battery cells to obtain thermal diffusion detection results among the plurality of battery cells; when the thermal diffusion detection result is that thermal diffusion exists, determining a second battery cell adjacent to the first battery cell in the plurality of battery cells, and determining a second discharge loop corresponding to the second battery cell; and controlling the second discharge loop to discharge the second battery cell, and controlling the liquid cooling device to cool the first battery cell and the second battery cell. According to the invention, the safety of the vehicle battery is ensured.

Description

Technical Field

[0001] This application relates to the field of new energy vehicle technology, and in particular to a vehicle control method, device, and readable storage medium. Background Technology

[0002] Currently, thermal runaway of vehicle power batteries is the biggest problem facing the industry. Once thermal runaway occurs, the entire battery pack becomes a source of enormous energy explosion, causing damage to the vehicle and people. How to suppress the occurrence and spread of battery thermal runaway is a difficult problem for the entire new energy industry. It is evident that existing vehicle control methods have technical problems such as poor battery safety. Summary of the Invention

[0003] This application provides a vehicle control method, apparatus, and readable storage medium to address technical problems such as poor battery safety in the prior art.

[0004] A first aspect of this application provides a vehicle control method. The vehicle includes a battery and a liquid cooling device. The battery includes multiple cells and multiple discharge circuits, with each cell and discharge circuit corresponding to the other. The method includes: When thermal runaway of the first battery cell is detected and the voltage of the first battery cell is greater than the preset voltage, the first discharge circuit is controlled to discharge the first battery cell, and the liquid cooling device is controlled to cool the first battery cell. The first battery cell is any one of multiple battery cells, and the first discharge circuit is the discharge circuit corresponding to the first battery cell. The thermal diffusion between multiple battery cells is detected to obtain the thermal diffusion detection results between multiple battery cells; If the thermal diffusion detection result indicates the presence of thermal diffusion, identify the second battery cell that is adjacent to the first battery cell among multiple battery cells, and determine the second discharge circuit corresponding to the second battery cell; The second discharge circuit is controlled to discharge the second battery cell, and the liquid cooling device is controlled to cool the first and second battery cells.

[0005] In this embodiment, the vehicle control method detects thermal runaway in the first battery cell and that the voltage of the first battery cell is greater than a preset voltage. It then controls the first discharge circuit to discharge the first battery cell and controls the liquid cooling device to cool it. If the thermal diffusion detection result indicates the presence of thermal diffusion, it controls the second discharge circuit to discharge the second battery cell and controls the liquid cooling device to cool both the first and second battery cells. This dual suppression measure improves battery safety.

[0006] A second aspect of this application provides a vehicle control device. The vehicle includes a battery and a liquid cooling device. The battery includes multiple battery cells and multiple discharge circuits, with each battery cell and discharge circuit corresponding to the other. The device includes: The first control unit is used to control the first discharge circuit to discharge the first battery cell and control the liquid cooling device to cool the first battery cell when thermal runaway of the first battery cell is detected and the voltage of the first battery cell is greater than a preset voltage. The first battery cell is any one of a plurality of battery cells and the first discharge circuit is the discharge circuit corresponding to the first battery cell. The detection unit is used to detect the thermal diffusion between multiple battery cells to obtain the thermal diffusion detection results between multiple battery cells; The determining unit is used to determine the second battery cell adjacent to the first battery cell among multiple battery cells when the thermal diffusion detection result indicates the presence of thermal diffusion, and to determine the second discharge circuit corresponding to the second battery cell. The second control unit is used to control the second discharge circuit to discharge the second battery cell and to control the liquid cooling device to cool the first and second battery cells.

[0007] In this embodiment, the vehicle control device detects thermal runaway in the first battery cell and that the voltage of the first battery cell is greater than a preset voltage. It controls the first discharge circuit to discharge the first battery cell and controls the liquid cooling device to cool the first battery cell. If the thermal diffusion detection result indicates the presence of thermal diffusion, it controls the second discharge circuit to discharge the second battery cell and controls the liquid cooling device to cool both the first and second battery cells. This dual suppression measure improves battery safety.

[0008] A third aspect of this application provides another vehicle control device, including a processor and a memory. The memory stores a computer program that, when executed by the processor, implements the steps of the vehicle control method as described in any of the above embodiments. Therefore, this vehicle control device possesses all the beneficial effects of the vehicle control method in any of the above embodiments, which will not be elaborated further here.

[0009] A fourth aspect of this application provides a readable storage medium storing a program or instructions that, when executed by a processor, implement the steps of the vehicle control method as described in any of the above embodiments. Therefore, this readable storage medium possesses all the beneficial effects of the vehicle control method in any of the above embodiments, which will not be elaborated further here. Attached Figure Description

[0010] All the beneficial technical effects of the readable storage medium defined in the fourth aspect will not be elaborated further here.

[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 A flowchart of a vehicle control method provided in an embodiment of this application; Figure 2 A schematic diagram of the discharge circuit provided in the embodiments of this application; Figure 3 Functional block diagram of the vehicle control device provided in the embodiments of this application; Figure 4 This is a structural block diagram of a vehicle control device provided in an embodiment of this application. Detailed Implementation

[0013] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0014] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, 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 said element. The term "two or more" includes two or more cases.

[0015] In some embodiments, such as Figure 1 As shown, an embodiment of this application provides a vehicle control method, including: Step S101: When thermal runaway of the first battery cell is detected and the voltage of the first battery cell is greater than the preset voltage, the first discharge circuit is controlled to discharge the first battery cell and the liquid cooling device is controlled to cool the first battery cell. Step S102: Detect the thermal diffusion between multiple battery cells to obtain the thermal diffusion detection results between multiple battery cells; Step S103: If the thermal diffusion detection result indicates the presence of thermal diffusion, determine the second battery cell that is adjacent to the first battery cell among the multiple battery cells, and determine the second discharge circuit corresponding to the second battery cell; Step S104: Control the second discharge circuit to discharge the second battery cell, and control the liquid cooling device to cool the first and second battery cells.

[0016] In this embodiment, a vehicle control method is proposed, wherein the vehicle includes a battery and a liquid cooling device, the liquid cooling device is used to cool the battery, the battery includes multiple cells and multiple discharge circuits, and the multiple cells and multiple discharge circuits correspond one-to-one.

[0017] For example, the battery can specifically be the vehicle's power battery, which is the core energy source for electric vehicles.

[0018] For example, a heat dissipation system that removes heat through liquid circulation is mainly used for temperature control of power batteries. Its core components include coolant, water pump, radiator, and thermostat, which regulates temperature through large / small circulation.

[0019] For example, the discharge circuit can be the low-voltage circuit of the battery cell. The low-voltage circuit is connected to the low-voltage load. When the discharge circuit is connected, the discharge circuit can transfer the electrical energy in the battery cell to the low-voltage load, thereby consuming the electrical energy in the battery cell.

[0020] During battery operation, multiple battery cells are monitored in real time.

[0021] For example, during battery operation, the voltage and temperature of each cell are monitored in real time.

[0022] Obtain the preset voltage corresponding to the battery cell.

[0023] For example, the preset voltage can be specifically 3V.

[0024] If thermal runaway is detected in the first battery cell and the voltage of the first battery cell is greater than the preset voltage, the first discharge circuit is controlled to discharge the first battery cell, and the liquid cooling device is controlled to cool the first battery cell.

[0025] The first cell is any one of the multiple cells, and the first discharge circuit is the discharge circuit corresponding to the first cell.

[0026] For example, thermal runaway of a battery cell is the most serious safety accident in a battery, which refers to an uncontrollable process in which the temperature inside the battery rises sharply (up to 800 degrees Celsius) due to a chain of exothermic reactions, causing fire or explosion.

[0027] For example, if the first battery cell experiences thermal runaway and its voltage exceeds a preset voltage, it indicates a high risk of thermal runaway in the first battery cell, requiring the simultaneous activation of the first discharge circuit and the liquid cooling device.

[0028] After the liquid cooling device is used to cool the first cell, the thermal diffusion between multiple cells is detected to obtain the thermal diffusion detection results between multiple cells.

[0029] For example, thermal runaway between battery cells refers to the process by which the heat released by one battery cell is transferred to adjacent cells through conduction, radiation, or other means when the cell experiences thermal runaway, triggering a chain reaction. This is a critical issue in the safety of power batteries and can potentially lead to the entire battery pack catching fire or exploding.

[0030] For example, the thermal diffusion detection result can be either the presence of thermal diffusion or the absence of thermal diffusion.

[0031] For example, after the liquid cooling device cools the first cell, the temperature and voltage between multiple cells can be continuously checked to determine the thermal diffusion detection results between the multiple cells.

[0032] If the thermal diffusion detection result indicates the presence of thermal diffusion, the second battery cell adjacent to the first battery cell is identified among multiple battery cells, and the second discharge circuit corresponding to the second battery cell is determined. Here, the second battery cell is the battery cell adjacent to the first battery cell, and the second discharge circuit is the discharge circuit corresponding to the second battery cell.

[0033] For example, if the thermal runaway detection result shows that thermal runaway exists, it means that the thermal runaway of the first cell has not been successfully suppressed and further suppression measures are needed.

[0034] The second discharge circuit is controlled to discharge the second battery cell, and the liquid cooling device is controlled to cool the first and second battery cells.

[0035] For example, when it is determined that thermal diffusion has occurred in the battery, the second discharge circuit is controlled to discharge the second cell, while the liquid cooling device is controlled to cool the first cell and the second cell, thereby suppressing the thermal diffusion of the battery.

[0036] It should be noted that in this embodiment, when thermal runaway of the first battery cell is detected, the first discharge circuit is controlled to discharge the first battery cell, and the liquid cooling device is controlled to cool the first battery cell, thereby consuming the charge of the first battery cell and reducing the risk of thermal runaway of the first battery cell.

[0037] It should also be noted that, in this embodiment, when the thermal runaway of the first cell still cannot be suppressed, which leads to thermal diffusion of the battery, the second discharge circuit is controlled to discharge the second cell, and the liquid cooling device is controlled to cool the first and second cells, thereby suppressing the thermal diffusion of the battery. The battery safety is improved through dual suppression measures.

[0038] In this embodiment, the vehicle control method detects thermal runaway in the first battery cell and that the voltage of the first battery cell is greater than a preset voltage. It then controls the first discharge circuit to discharge the first battery cell and controls the liquid cooling device to cool it. If the thermal diffusion detection result indicates the presence of thermal diffusion, it controls the second discharge circuit to discharge the second battery cell and controls the liquid cooling device to cool both the first and second battery cells. This dual suppression measure improves battery safety.

[0039] In some embodiments of this application, a vehicle control method is provided, wherein the vehicle further includes a backup battery, and the method further includes: If thermal runaway is detected in the first battery cell and the voltage of the first battery cell is less than or equal to the preset voltage, the backup battery is controlled to supply power to the liquid cooling device so that the liquid cooling device can cool down the first battery cell.

[0040] In this embodiment, the vehicle also includes a backup battery, which serves as a backup power source for the liquid cooling system.

[0041] For example, the backup battery can be a backup battery.

[0042] For example, the backup battery is charged by the mains battery.

[0043] If thermal runaway is detected in the first battery cell and the voltage of the first battery cell is less than or equal to the preset voltage, it indicates that the risk of thermal runaway in the first battery cell is low. The backup battery is then controlled to supply power to the liquid cooling device so that the liquid cooling device can cool down the first battery cell.

[0044] For example, if thermal runaway of the first battery cell is detected and the voltage of the first battery cell is less than or equal to a preset voltage, it indicates that the risk of thermal runaway of the first battery cell is low, and the thermal runaway of the first battery cell can be suppressed as long as the liquid cooling device is turned on.

[0045] For example, if the voltage of the first cell is less than or equal to a preset voltage, it indicates that the battery has insufficient power and the backup battery needs to be activated to supply power to the liquid cooling device.

[0046] In some embodiments, this application provides a vehicle control method that controls a liquid cooling device to cool a first battery cell, including: Control the battery to supply power to the liquid cooling device so that the liquid cooling device can cool down the first battery cell.

[0047] In this embodiment, when thermal runaway of the first battery cell is detected and the voltage of the first battery cell is greater than a preset voltage, the battery is controlled to supply power to the liquid cooling device so that the liquid cooling device can cool down the first battery cell.

[0048] For example, when thermal runaway of the first battery cell is detected and the voltage of the first battery cell is greater than 3V, the battery is controlled to supply power to the liquid cooling device so that the liquid cooling device can cool down the first battery cell.

[0049] In some embodiments, this application provides a vehicle control method that detects thermal diffusion between multiple battery cells to obtain thermal diffusion detection results between the multiple battery cells, including: The temperature between multiple battery cells is detected to obtain the temperature between the battery cells; If the temperature between battery cells is greater than or equal to a preset temperature, the thermal diffusion detection result is determined to indicate the presence of thermal diffusion. If the temperature between the battery cells is lower than the preset temperature, the thermal diffusion detection result is determined to be that there is no thermal diffusion.

[0050] In this embodiment, the temperature between multiple battery cells is detected to obtain the temperature between the battery cells, wherein the temperature between the battery cells is the real-time temperature between the multiple battery cells.

[0051] For example, the temperature between multiple battery cells can be detected using a temperature sensor.

[0052] Obtain a preset temperature, where the preset temperature is the temperature threshold for determining heat diffusion.

[0053] For example, the preset temperature can be 200 degrees Celsius.

[0054] If the temperature between battery cells is greater than or equal to the preset temperature, the thermal diffusion detection result is determined to indicate the presence of thermal diffusion.

[0055] If the temperature between the battery cells is lower than the preset temperature, the thermal diffusion detection result is determined to be that there is no thermal diffusion.

[0056] In some embodiments, this application provides a vehicle control method that determines a second battery cell adjacent to a first battery cell among a plurality of battery cells, including: Determine the first position of the first cell in the battery; Based on the first position, the second battery cell adjacent to the first battery cell is determined.

[0057] In this embodiment, a first position of the first cell in the battery is determined, wherein the first position indicates the location of the first cell in the battery.

[0058] For example, by locating the first battery cell, a first position can be obtained.

[0059] Based on the first position, the second battery cell adjacent to the first battery cell is determined.

[0060] For example, the adjacent position of the first position is determined as the second position, and the second cell in the battery is determined based on the second position.

[0061] In some embodiments of this application, a vehicle control method is provided. After detecting the thermal diffusion between multiple battery cells to obtain the thermal diffusion detection results between the multiple battery cells, the method further includes: If the thermal diffusion test result shows that there is no thermal diffusion, the first cell in the battery is replaced.

[0062] In this embodiment, if the thermal diffusion detection result shows that there is no thermal diffusion, it indicates that the thermal runaway of the first cell has been successfully suppressed.

[0063] The first cell in the battery is replaced to ensure battery safety.

[0064] In some embodiments, this application provides a vehicle control method, which, after controlling a liquid cooling device to cool a first battery cell and a second battery cell, further includes: Damage testing is performed on the battery to determine the level of damage. If the damage level is greater than or equal to the preset level, the battery should be replaced. If the damage level is less than the preset level, the battery will be repaired.

[0065] In this embodiment, damage detection is performed on the battery to determine the damage level of the battery, wherein the damage level represents the degree of damage to the battery.

[0066] For example, the damage level can be level one, level two, level three, level four, or level five damage.

[0067] Get the battery's preset level.

[0068] For example, the preset level can be level four damage.

[0069] If the damage level is greater than or equal to the preset level, it indicates that the battery is severely damaged and cannot be repaired, requiring replacement.

[0070] If the damage level is less than the preset level, it means that the battery damage is minor and the battery can be repaired.

[0071] For example, to suppress battery thermal runaway and inter-cell thermal diffusion, it is necessary to understand the causes of cell thermal runaway and inter-cell thermal diffusion from a fundamental perspective. Cell thermal runaway generally involves several processes. In the initial stage, the decomposition reaction of the SEI film (solid electrolyte interphase) of the negative electrode mainly occurs, during which the cell temperature gradually increases. In the second stage, as the cell temperature rises, the decomposition of the SEI film accelerates, and the high temperature also causes the decomposition of the active materials within the cell, releasing heat, until the critical temperature for cell thermal runaway is reached. Subsequently, the high temperature causes the cell separator to disintegrate on a large scale, leading to direct contact between the positive and negative electrodes of the cell, causing a short circuit between the positive and negative electrodes inside the cell, and the energy of the cell is released instantaneously. At this point, the cell's thermal runaway can no longer be suppressed. Therefore, to suppress cell thermal runaway, it is necessary to identify the thermally runaway cell and take measures to suppress it before the third stage. Once the cell reaches the third stage, only additional measures can be taken to reduce the impact of the thermally runaway cell on surrounding cells and suppress inter-cell thermal diffusion.

[0072] Based on the above principle analysis, if a thermal runaway cell can be identified and discharged before it reaches stage three, and battery cooling is initiated simultaneously, then even if the cell reaches stage three, it will be difficult to cause significant damage due to power loss. In traditional solutions, if a tendency for thermal runaway is detected, battery cooling is activated to lower the battery temperature. However, battery cooling consumes the energy of the entire battery pack, while the power consumption of activating battery cooling is relatively low, resulting in minimal energy loss to the thermal runaway cell. If the energy consumption for cooling activation is entirely provided by the thermal runaway cell or several surrounding cells, then it can quickly dissipate the energy of the thermal runaway cell, thus suppressing the risk of thermal runaway. A detailed diagram is shown below. Figure 2 As shown, the contacts of several battery cells are connected by wires to form a low-voltage circuit. The maximum voltage of this low-voltage circuit should be less than the 36V safety voltage, so that even if this low-voltage circuit discharges externally, there will be no risk of arcing or short circuit. (Illustration) Figure 2 A low-voltage discharge circuit is listed. Multiple low-voltage circuits can be flexibly set up according to different battery cells, design schemes, and costs to ensure maximum detection and power dissipation of thermally runaway cells. Regarding the cell thermal runaway suppression process, when a cell in the battery pack is detected to have a tendency to thermal runaway, the battery management system will report a potential thermal runaway signal and simultaneously check whether the voltage of each cell in the low-voltage circuit containing the thermally runaway cell is below 3.0V. If it is below 3.0V, it indicates that the cell charge in that circuit is low, and the risk of thermal runaway is also low. As long as the cooling system can be activated, the thermally runaway cell can be suppressed. If the cell voltage is above 3.0V, then the circuit can be closed to supply power to the cooling water pump, dissipating the cell charge in that circuit and reducing the risk of cell thermal runaway.

[0073] If the above process fails to suppress thermal runaway of the battery cell, or if the potential thermal runaway signal is not reported in time, causing the battery cell to enter the third stage of thermal runaway, then thermal runaway is unavoidable. The only solution is to prevent the thermal runaway cell from spreading to surrounding cells. After a thermal runaway signal is reported, high voltage is applied to prevent ejected material from the runaway cell from causing arcing and short circuits in the high-voltage system. At this point, it is impossible to discharge the battery pack to reduce the charge of the thermal runaway cell. This embodiment proposes an alternative solution to address this situation. Conventional solutions involve adding thermal insulation material between cells to slow heat transfer. However, if the charge of cells surrounding the thermal runaway cell can be rapidly consumed, even if the heat spreads to the surrounding cells, it will not cause thermal runaway in those cells. Even if a surrounding cell does experience thermal runaway, the low charge will further reduce the damage. Furthermore, over time, the thermal runaway will only occur between a few cells and will not cause overall battery-level thermal runaway. In addition, surrounding cells can also simultaneously supply power to the cooling system's water pump, allowing the cooling circulation system to remain operational even under high voltage conditions. When the battery management system detects that a cell has experienced thermal runaway, it will simultaneously detect the location of the circuit where the thermally runaway cell is located and determine which low-voltage circuits are adjacent to it. Subsequently, all low-voltage circuits adjacent to the thermally runaway cell are closed, external discharge begins, and the cooling system's water pump is activated to cool the battery.

[0074] In some embodiments, such as Figure 3 As shown, an embodiment of this application provides a vehicle control device 300, including: The first control unit 302 is used to control the first discharge circuit to discharge the first battery cell and control the liquid cooling device to cool the first battery cell when thermal runaway of the first battery cell is detected and the voltage of the first battery cell is greater than a preset voltage. The first battery cell is any one of a plurality of battery cells and the first discharge circuit is the discharge circuit corresponding to the first battery cell. The detection unit 304 is used to detect the thermal diffusion between multiple battery cells to obtain the thermal diffusion detection results between multiple battery cells; The determining unit 306 is used to determine the second battery cell adjacent to the first battery cell among multiple battery cells when the thermal diffusion detection result indicates the presence of thermal diffusion, and to determine the second discharge circuit corresponding to the second battery cell. The second control unit 308 is used to control the second discharge circuit to discharge the second battery cell and to control the liquid cooling device to cool the first and second battery cells.

[0075] In this embodiment, the vehicle control device 300, upon detecting thermal runaway in the first battery cell and its voltage exceeding a preset voltage, controls the first discharge circuit to discharge the first battery cell and controls the liquid cooling device to cool it down. If the thermal diffusion detection result indicates the presence of thermal diffusion, it controls the second discharge circuit to discharge the second battery cell and controls the liquid cooling device to cool both the first and second battery cells. This dual suppression measure improves battery safety.

[0076] In some embodiments of this application, a vehicle control device 300 is provided, which further includes a third control unit, the third control unit being used for: If thermal runaway is detected in the first battery cell and the voltage of the first battery cell is less than or equal to the preset voltage, the backup battery is controlled to supply power to the liquid cooling device so that the liquid cooling device can cool down the first battery cell.

[0077] In some embodiments of this application, a vehicle control device 300 is provided, wherein the first control unit 302 is further configured to: Control the battery to supply power to the liquid cooling device so that the liquid cooling device can cool down the first battery cell.

[0078] In some embodiments of this application, a vehicle control device 300 is provided, wherein the detection unit 304 is further configured to: The temperature between multiple battery cells is detected to obtain the temperature between the battery cells; If the temperature between battery cells is greater than or equal to a preset temperature, the thermal diffusion detection result is determined to indicate the presence of thermal diffusion. If the temperature between the battery cells is lower than the preset temperature, the thermal diffusion detection result is determined to be that there is no thermal diffusion.

[0079] In some embodiments of this application, a vehicle control device 300 is provided, wherein the determining unit 306 is further configured to: Determine the first position of the first cell in the battery; Based on the first position, the second battery cell adjacent to the first battery cell is determined.

[0080] In some embodiments, a vehicle control device 300 is provided in this application, further comprising a fourth control unit, the fourth control unit being used for: If the thermal diffusion test result shows that there is no thermal diffusion, the first cell in the battery is replaced.

[0081] In some embodiments of this application, a vehicle control device 300 is provided, further comprising a fifth control unit, the fifth control unit being used for: Damage testing is performed on the battery to determine the level of damage. If the damage level is greater than or equal to the preset level, the battery should be replaced. If the damage level is less than the preset level, the battery will be repaired.

[0082] In some embodiments, such as Figure 4 As shown, a vehicle control device 400 is proposed. The vehicle control device 400 includes a processor 402 and a memory 404. The memory 404 stores a computer program, which, when executed by the processor 402, implements the steps of the vehicle control method as described in any of the above embodiments. Therefore, the vehicle control device 400 possesses all the beneficial effects of the vehicle control method in any of the above embodiments, which will not be elaborated further here.

[0083] In some embodiments, a readable storage medium is provided having a program stored thereon, which, when executed by a processor, implements the steps of the vehicle control method as described in any of the above embodiments, and thus has all the beneficial technical effects of the vehicle control method described in any of the above embodiments.

[0084] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0085] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-readable program code.

[0086] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0087] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0088] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0089] This application also provides a computer program product, which includes computer software instructions that, when executed on a processing device, cause the processing device to execute a process of a vehicle control method.

[0090] A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0091] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0092] In the several embodiments provided in this application, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between devices or units, and may be electrical, mechanical, or other forms.

[0093] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0094] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0095] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0096] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0097] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0098] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A method for controlling a vehicle, characterized in that, The vehicle includes a battery and a liquid cooling device. The battery includes multiple battery cells and multiple discharge circuits, with each of the multiple battery cells and multiple discharge circuits corresponding one-to-one. The method includes: When thermal runaway is detected in the first battery cell and the voltage of the first battery cell is greater than a preset voltage, the first discharge circuit is controlled to discharge the first battery cell, and the liquid cooling device is controlled to cool the first battery cell. The first battery cell is any one of the multiple battery cells, and the first discharge circuit is the discharge circuit corresponding to the first battery cell. The thermal diffusion between multiple battery cells is detected to obtain the thermal diffusion detection results between multiple battery cells; If the thermal diffusion detection result indicates the presence of thermal diffusion, a second battery cell adjacent to the first battery cell is identified among the plurality of battery cells, and a second discharge circuit corresponding to the second battery cell is determined. The second discharge circuit is controlled to discharge the second battery cell, and the liquid cooling device is controlled to cool the first battery cell and the second battery cell.

2. The method according to claim 1, characterized in that, The vehicle also includes a backup battery, and the method further includes: If thermal runaway is detected in the first battery cell and the voltage of the first battery cell is less than or equal to the preset voltage, the backup battery is controlled to supply power to the liquid cooling device so that the liquid cooling device can cool down the first battery cell.

3. The method according to claim 1, characterized in that, The control of the liquid cooling device to cool the first battery cell includes: The battery is controlled to supply power to the liquid cooling device so that the liquid cooling device can cool down the first battery cell.

4. The method according to claim 1, characterized in that, The process of detecting the thermal diffusion between multiple battery cells to obtain thermal diffusion detection results between multiple battery cells includes: The temperature between multiple battery cells is detected to obtain the temperature between the battery cells; If the temperature between the battery cells is greater than or equal to a preset temperature, the thermal diffusion detection result is determined to indicate the presence of thermal diffusion. If the temperature between the battery cells is lower than the preset temperature, the thermal diffusion detection result is determined to be that there is no thermal diffusion.

5. The method according to claim 1, characterized in that, The step of determining the second battery cell adjacent to the first battery cell among the plurality of battery cells includes: Determine the first position of the first cell in the battery; Based on the first position, the second battery cell adjacent to the first battery cell is determined.

6. The method according to any one of claims 1 to 5, characterized in that, After detecting the thermal diffusion between the multiple battery cells to obtain the thermal diffusion detection results between the multiple battery cells, the method further includes: If the thermal diffusion detection result indicates that there is no thermal diffusion, the first cell in the battery is replaced.

7. The method according to any one of claims 1 to 5, characterized in that, After the liquid cooling device is used to cool the first battery cell and the second battery cell, the method further includes: The battery is subjected to damage detection to determine the level of damage. If the damage level is greater than or equal to a preset level, the battery shall be replaced. If the damage level is less than the preset level, the battery is repaired.

8. A vehicle control device, characterized in that, The vehicle includes a battery and a liquid cooling device. The battery includes multiple battery cells and multiple discharge circuits, with each battery cell and discharge circuit corresponding to a specific one. The device includes: The first control unit is configured to, when thermal runaway of the first battery cell is detected and the voltage of the first battery cell is greater than a preset voltage, control the first discharge circuit to discharge the first battery cell and control the liquid cooling device to cool the first battery cell. The first battery cell is any one of the plurality of battery cells, and the first discharge circuit is the discharge circuit corresponding to the first battery cell. A detection unit is used to detect the thermal diffusion between multiple battery cells to obtain the thermal diffusion detection results between multiple battery cells; The determining unit is configured to, when the thermal diffusion detection result indicates the presence of thermal diffusion, determine a second battery cell adjacent to the first battery cell among the plurality of battery cells, and determine a second discharge circuit corresponding to the second battery cell; The second control unit is used to control the second discharge circuit to discharge the second battery cell and to control the liquid cooling device to cool the first battery cell and the second battery cell.

9. A vehicle control device, characterized in that, include: processor; A memory, which stores programs or instructions, wherein a processor, when executing the programs or instructions in the memory, implements the steps of the vehicle control method as described in any one of claims 1 to 7.

10. A readable storage medium, characterized in that, A program or instructions are stored on a readable storage medium, which, when executed by a processor, implement the steps of the vehicle control method as described in any one of claims 1 to 7.

Images