Method and device for monitoring thermal runaway of power battery and electronic equipment

Abstract

The invention discloses a power battery thermal runaway monitoring method and device and electronic equipment, and belongs to the technical field of vehicles. The method comprises the steps that whether a power battery in a to-be-detected vehicle is in a thermal runaway state or not is determined based on target attribute parameters of the to-be-detected vehicle, and the target attribute parameters are used for representing a plurality of safety monitoring attribute parameters corresponding to the power battery; if the power battery is in the thermal runaway state, a target thermal runaway adjustment strategy for the power battery is determined based on the target attribute parameters and a preset fault parameter rule, and the target thermal runaway adjustment strategy is one selected from the two thermal runaway adjustment strategies; and performing thermal runaway adjustment on the power battery based on the target thermal runaway adjustment strategy to complete monitoring of thermal runaway in the power battery. According to the embodiment provided by the invention, the thermal runaway adjustment accuracy in the power battery is improved, and meanwhile, the probability of false alarm of thermal runaway is greatly reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a method, device and electronic equipment for monitoring thermal runaway of a power battery. Background Art

[0002] In recent years, with the increasing number of new energy electric vehicles, their safety issues have become increasingly prominent. At present, new energy electric vehicles generally use lithium-ion batteries as power sources. Once thermal runaway of the power battery occurs and the protection measures are insufficient, the out-of-control battery cell will instantly ignite the surrounding battery cells, resulting in thermal runaway of the entire battery pack. In severe cases, it will cause the vehicle to be destroyed and people to die. In order to avoid similar safety accidents, the production requirements of power batteries have become increasingly stringent in recent years, requiring special safety measures to be set up during the design of battery packs to ensure that when a single battery cell has thermal runaway, the heat will not spread to other battery cells, and there will be no fire or explosion. In addition, when a battery cell has thermal runaway, due to the loss of capacity, some parameters inside the battery cell will change, leading to thermal runaway.

[0003] However, the current traditional method of detecting thermal runaway of batteries has a relatively simple strategy for adjusting battery parameters, which limits the thermal runaway situations of power batteries that can be monitored and adjusted. This in turn leads to low accuracy in thermal runaway adjustment of power batteries and is prone to false alarms. Summary of the invention

[0004] The embodiments of the present application provide a method, device and electronic equipment for monitoring thermal runaway of a power battery. The embodiments provided in the present application solve the technical problems in the prior art that thermal runaway regulation of power batteries is low in accuracy and easily causes false alarms. The embodiments provided in the present application improve the accuracy of thermal runaway regulation in power batteries while greatly reducing the probability of false alarms of thermal runaway.

[0005] In a first aspect of an embodiment of the present application, an embodiment of the present application provides a method for monitoring thermal runaway of a power battery. The method for monitoring thermal runaway of a power battery comprises: Determine whether the power battery in the vehicle to be detected is in a thermal runaway state based on the target attribute parameters of the vehicle to be detected, wherein the target attribute parameters are used to characterize a plurality of safety monitoring attribute parameters corresponding to the power battery; If the power battery is in a thermal runaway state, determining a target thermal runaway regulation strategy for the power battery based on the target attribute parameter and a preset fault parameter rule, wherein the target thermal runaway regulation strategy is a selected one of two thermal runaway regulation strategies; Based on the above target thermal runaway regulation strategy, thermal runaway regulation is performed on the above power battery to complete the monitoring of thermal runaway in the above power battery.

[0006] In a feasible implementation manner, the target attribute parameter includes a signal acquisition / transmission parameter, and the determining whether the power battery in the vehicle to be detected is in a thermal runaway state based on the target attribute parameter of the vehicle to be detected includes: determining whether the signal acquisition / transmission parameter fails; If the above signal acquisition / transmission parameters fail, it is determined that the power battery in the detection vehicle is in a thermal runaway state.

[0007] In a feasible implementation manner, the target attribute parameter further includes at least one battery cell attribute parameter, and determining whether the power battery in the vehicle to be detected is in a thermal runaway state based on the target attribute parameter of the vehicle to be detected further includes: Determine whether each battery cell attribute parameter has a fault; If one of the above-mentioned battery cell attribute parameters fails, it is determined that the power battery in the detection vehicle is in a thermal runaway state.

[0008] In a feasible implementation manner, the preset fault parameter rule includes a first preset fault parameter rule, the target thermal runaway regulation strategy includes a first target thermal runaway regulation strategy, and if the power battery is in a thermal runaway state, then based on the target attribute parameter and the preset fault parameter rule, determining a target thermal runaway regulation strategy for the power battery includes: If the power battery is in a thermal runaway state, the number of faulty parameters in the target attribute parameters is determined; If it is determined that the number of the above parameters meets the first preset fault parameter rule, the target thermal runaway regulation strategy for the above power battery is determined to be the first target thermal runaway regulation strategy, wherein the first preset fault parameter rule is used to characterize a first limiting rule corresponding to the number of fault parameters.

[0009] In a feasible implementation manner, the preset fault parameter rule includes a second preset fault parameter rule, the target thermal runaway regulation strategy includes a second target thermal runaway regulation strategy, and if the power battery is in a thermal runaway state, the target thermal runaway regulation strategy for the power battery is determined based on the target attribute parameter and the preset fault parameter rule, further comprising: If the power battery is in a thermal runaway state, the number of faulty parameters in the target attribute parameters is determined; If it is determined that the number of the above parameters meets the second preset fault parameter rule, the target thermal runaway regulation strategy for the above power battery is determined to be the second target thermal runaway regulation strategy, wherein the second preset fault parameter rule is used to characterize the second limiting rule corresponding to the number of fault parameters.

[0010] In a feasible implementation manner, the thermal runaway regulation of the power battery based on the target thermal runaway regulation strategy includes: According to the first target thermal runaway regulation strategy, the cooling water pump is controlled to start, and the power battery is regulated for thermal runaway; After the cooling water pump is turned on for a preset time, controlling the cooling water pump to be turned off; After the cooling water pump is turned off, it is determined whether the power battery is in a thermal runaway state.

[0011] In a feasible implementation manner, the thermal runaway regulation of the power battery based on the target thermal runaway regulation strategy further includes: According to the second target thermal runaway regulation strategy, the cooling water pump is controlled to start, the high voltage of the power battery is cut off, and a prompt message is issued simultaneously; After the cooling water pump is turned on for a preset time, controlling the cooling water pump to be turned off; After the cooling water pump is turned off, it is determined whether the power battery is in a thermal runaway state.

[0012] According to a second aspect of the embodiments of the present application, an electronic device is provided, comprising: a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor communicates with the memory through the bus, and the machine-readable instructions are executed by the processor when running, such as the steps of the method for monitoring thermal runaway of a power battery.

[0013] According to a third aspect of the embodiments of the present application, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method for monitoring thermal runaway of a power battery as described above are executed.

[0014] In a fourth aspect of the embodiments of the present application, an embodiment of the present application provides a vehicle monitoring device, including: the electronic device as in the second aspect; and / or, a computer-readable storage medium as in the third aspect.

[0015] The power battery thermal runaway monitoring method, device and electronic device provided in the embodiments of the present application, compared with the prior art, the embodiments provided in the present application determine whether the power battery in the vehicle to be detected is in a thermal runaway state based on the target attribute parameters of the vehicle to be detected, and when the power battery is in a thermal runaway state, determine the target thermal runaway adjustment strategy for the power battery based on the target attribute parameters and preset fault parameter rules, and then perform thermal runaway adjustment on the power battery based on the target thermal runaway adjustment strategy to complete the monitoring of thermal runaway in the power battery. While improving the accuracy of thermal runaway adjustment in the power battery, the present application greatly reduces the probability of false thermal runaway alarms. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A flowchart of a method for monitoring thermal runaway of a power battery provided in an embodiment of the present application is shown; Figure 2 A flowchart of an embodiment of a method for monitoring thermal runaway of a power battery provided in an embodiment of the present application is shown; Figure 3 A structural block diagram of a power battery thermal runaway monitoring device provided in an embodiment of the present application is shown; Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application is shown; Figure 5 A schematic diagram of the structure of a vehicle monitoring device provided in an embodiment of the present application is shown; Figures 3 to 5 The corresponding relationship between the reference numerals and the names of the drawings is as follows: 300 monitoring device for thermal runaway of power battery; 310 first determination module; 320 second determination module; 330 regulation module; 400 electronic device; 410 processor; 420 memory; 430 bus; 50 vehicle monitoring device; 600 computer-readable storage medium. DETAILED DESCRIPTION

[0017] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through 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.

[0018] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0019] First, the applicable application scenarios of the present application are introduced. The embodiments provided in the present application are applicable to the field of vehicle technology.

[0020] At present, the traditional method of detecting thermal runaway of batteries has a relatively simple strategy for adjusting battery parameters, which limits the thermal runaway situations of power batteries that can be monitored and adjusted. This leads to low accuracy in thermal runaway adjustment of power batteries and is prone to false alarms.

[0021] For existing power batteries, the values ​​of at least two battery cell parameters must be abnormal to determine whether the battery cell has thermal runaway. If the sampling module of the battery cell fails, causing a certain sampling data to fail, or due to other reasons, only one parameter value is abnormal, then the thermal runaway signal is likely to fail to be sent, and the corresponding safety measures cannot be activated. The thermal runaway of a single battery cell may develop into a thermal runaway of the entire pack. When the battery pack has thermal runaway, any second of escape time is extremely precious. During thermal runaway, the activation of the cooling system can delay or even inhibit the occurrence of heat diffusion between batteries, greatly increasing the escape time of passengers. If the cooling strategy cannot be activated during thermal runaway due to strategy problems, the passengers lose precious escape time, which is undoubtedly a huge regret and poses a huge safety hazard. In addition, the traditional single strategy for judging thermal failure will cause the BMS to send an erroneous thermal runaway alarm signal when the sampling module fails, which may cause the entire vehicle to suddenly lose high voltage power, which is very dangerous during normal use of the vehicle. Therefore, in the design of the safety strategy for the battery pack, the false alarm of the BMS is also an important consideration.

[0022] Based on this, the embodiments of the present application provide a method, device and electronic device for monitoring thermal runaway of a power battery. The embodiments provided by the present application solve the technical problems in the prior art that the thermal runaway regulation of the power battery is low in accuracy and easily causes false alarms. The embodiments provided by the present application not only improve the accuracy of thermal runaway regulation in the power battery, but also greatly reduce the probability of false alarms of thermal runaway.

[0023] See also Figure 1 , Figure 1 A flowchart of a method for monitoring thermal runaway of a power battery provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the method for monitoring thermal runaway of a power battery includes the following steps: S101. Determine whether a power battery in the vehicle to be detected is in a thermal runaway state based on target attribute parameters of the vehicle to be detected, wherein the target attribute parameters are used to characterize a plurality of safety monitoring attribute parameters corresponding to the power battery.

[0024] In this step, in the embodiment provided by the present application, after selecting the vehicle to be detected, the target attribute parameters related to the power battery in the vehicle to be detected must first be determined, and according to different target attribute parameters and the preset parameter threshold ranges corresponding to the respective target attribute parameters, it is determined whether the power battery in the vehicle to be detected is in a thermal runaway state. When all types of target attribute parameters under the vehicle to be detected are within their respective corresponding preset parameter threshold ranges, it is determined that the power battery in the vehicle to be detected does not have thermal runaway. At this time, according to the current power battery state and the actual values ​​of each target attribute parameter, it is determined whether it is necessary to turn on the cooling water pump (i.e., the cooling system in the power battery) to perform corresponding thermal management on the power battery in the current state, so that the power battery can work better and exert stronger performance; if necessary, among all types of target attribute parameters under the vehicle to be detected, when any type of target attribute parameter is not within the corresponding preset parameter threshold range, it is determined that the power battery in the vehicle to be detected has thermal runaway. At this time, different thermal runaway states adjust the power battery with different thermal runaway adjustment strategies.

[0025] It can be understood that the thermal runaway regulation strategy corresponding to when any one type of target attribute parameter in the embodiments provided in the present application is not within the corresponding preset parameter threshold range is different from the thermal runaway regulation strategy corresponding to when any two types of target attribute parameters are not within the corresponding preset parameter threshold range.

[0026] Among them, the vehicle to be detected is used to characterize the vehicle that is in use and requires power electrical status monitoring in the current state in the embodiments provided by this application; the target attribute parameters in the embodiments provided by this application can be customized according to different application scenarios.

[0027] In this way, it is assumed that the target attribute parameters in the embodiments provided in the present application can be specific but not limited to the collected voltage of each battery cell in the power battery, the collected temperature of each battery cell, the pressure inside the pack, and the signal collection / transmission parameters, and the signal collection / transmission parameters are used to characterize the signal during the process of signal collection or transmission of each battery cell in the power battery, and if the signal collection / transmission parameters fail, it means that the sampling module may fail during the process of signal collection of each battery cell in the power battery.

[0028] In the above, the collection voltage of each battery cell in the power battery in the embodiment provided in the present application will change, and after the explosion-proof valve of the battery cell is opened, high-temperature and high-speed flue gas will be ejected, causing the pressure inside the power battery pack to change; and the large amount of heat generated by the battery cell during thermal runaway will cause the collection temperature of the battery cell to rise sharply. Therefore, these characteristic changes of the battery cell during thermal runaway can be used as a basis for determining whether a battery cell has experienced thermal runaway.

[0029] S102: If the power battery is in a thermal runaway state, a target thermal runaway regulation strategy for the power battery is determined based on target attribute parameters and preset fault parameter rules, wherein the target thermal runaway regulation strategy is a selected one of two thermal runaway regulation strategies.

[0030] In this step, after determining that the power battery is in a thermal runaway state (i.e., there is a target attribute parameter that is not within the corresponding preset parameter threshold range), the embodiment provided in the present application determines the number and type of target attribute parameters that meet the preset fault parameter rules among the target attribute parameters of the power battery based on the corresponding target attribute parameters and the preset fault parameter rules, and then performs a target thermal runaway adjustment strategy on the power battery based on the number and type.

[0031] It can be understood that after determining that the power battery is in a thermal runaway state, the embodiment provided in the present application will determine the number of target attribute parameters that are not within the corresponding preset parameter threshold range, and then match different target thermal runaway regulation strategies according to different numbers to perform corresponding runaway adjustments to complete the monitoring of thermal runaway in the power battery. Here, no matter what type of target thermal runaway regulation strategy is used, corresponding cooling adjustments need to be performed, that is, the cooling water pump is controlled to turn on to heat the power battery so as to suppress thermal runaway and heat diffusion of the corresponding battery cell.

[0032] Among them, the target thermal runaway regulation strategy in the embodiments provided in the present application includes at least one; the preset fault parameter rule in the embodiments provided in the present application includes at least one; it is assumed that the target thermal runaway regulation strategy in the embodiments provided in the present application includes two, specifically the first target thermal runaway regulation strategy and the second target thermal runaway regulation strategy; it is assumed that the preset fault parameter rules in the embodiments provided in the present application include two, specifically the first preset fault parameter rule and the second preset fault parameter rule.

[0033] S103. Based on the target thermal runaway regulation strategy, perform thermal runaway regulation on the power battery to complete the monitoring of thermal runaway in the power battery.

[0034] In this step, after determining the different target thermal runaway regulation strategies in the embodiments provided in the present application, thermal runaway regulation is performed on the kilometer batteries in different thermal runaway states according to the different target thermal runaway regulation strategies to complete the monitoring of thermal runaway in the power battery.

[0035] It can be understood that different target thermal runaway regulation strategies in the embodiments provided in the present application all require controlling the cooling water pump to turn on, but the direct difference between different target thermal runaway regulation strategies lies in whether the corresponding thermal runaway information is given to the driver to prompt the driver of the fault information and at the same time cut off the high voltage of the power battery.

[0036] The method for monitoring thermal runaway of a power battery provided in an embodiment of the present application, compared with the prior art, determines whether the power battery in the vehicle to be detected is in a thermal runaway state based on the target attribute parameters of the vehicle to be detected, and when the power battery is in a thermal runaway state, determines a target thermal runaway adjustment strategy for the power battery based on the target attribute parameters and preset fault parameter rules, and then performs thermal runaway adjustment on the power battery based on the target thermal runaway adjustment strategy to complete the monitoring of thermal runaway in the power battery. The present application realizes the monitoring of thermal runaway of the power battery by selecting a thermal runaway adjustment strategy, which improves the accuracy of thermal runaway adjustment in the power battery and greatly reduces the probability of false alarm of thermal runaway.

[0037] In one embodiment, the target attribute parameters include signal acquisition / transmission parameters, and step S101 includes the following sub-steps: Sub-step 1011, determining whether a signal acquisition / transmission parameter fails.

[0038] In this step, the embodiment provided in the present application needs to determine whether the signal acquisition / transmission parameter is within its corresponding preset parameter threshold range. If so, it is determined that the signal acquisition / transmission parameter is faulty; if not, it is determined that the signal acquisition / transmission parameter is not faulty.

[0039] Sub-step 1012: If a signal acquisition / transmission parameter fails, it is determined that the power battery in the vehicle to be detected is in a thermal runaway state.

[0040] In this step, after determining that the signal acquisition / transmission parameter is not within its corresponding preset parameter threshold range, that is, after the signal acquisition / transmission parameter fails, it is determined that the power battery in the vehicle to be tested is in a thermal runaway state. At this time, what must be done is to control the cooling water pump to turn on.

[0041] In one embodiment, the target attribute parameter further includes at least one battery cell attribute parameter, and step S101 further includes the following sub-steps: Sub-step 1013: determine whether a fault occurs in each battery cell attribute parameter.

[0042] In this step, the embodiment provided in the present application needs to determine whether each battery cell attribute parameter is within its corresponding preset parameter threshold range. If so, it is determined that each battery cell attribute parameter has a fault; if not, it is determined that each battery cell attribute parameter has not a fault.

[0043] Among them, the attribute parameters of each battery cell in the embodiments provided in the present application include but are not limited to the collected voltage of each battery cell in the power battery, the collected temperature of each battery cell and the pressure inside the pack.

[0044] Sub-step 1014: If any of the battery cell attribute parameters fails, it is determined that the power battery in the detection vehicle is in a thermal runaway state.

[0045] In this step, after determining that any cell attribute parameter is not within its corresponding preset parameter threshold range, that is, after the cell attribute parameter fails, it is determined that the power battery in the vehicle to be tested is in a thermal runaway state. At this time, what must be done is to control the cooling water pump to turn on.

[0046] In one embodiment, the preset fault parameter rule includes a first preset fault parameter rule and a second preset fault parameter rule, the target thermal runaway regulation strategy includes a first target thermal runaway regulation strategy and a second target thermal runaway regulation strategy, and step S102 includes the following sub-steps: Sub-step 1021: If the power battery is in a thermal runaway state, determine the number of faulty parameters in the target attribute parameters.

[0047] In this step, when it is determined that the power battery is in a thermal runaway state, the number of faulty parameters in the target attribute parameters is determined, that is, the number of parameters in the target attribute parameters that are not within the corresponding preset parameter threshold range.

[0048] Sub-step 1022: If it is determined that the number of parameters satisfies the first preset fault parameter rule, determine that the target thermal runaway regulation strategy for the power battery is the first target thermal runaway regulation strategy, wherein the first preset fault parameter rule is used to characterize a first limiting rule corresponding to the number of fault parameters.

[0049] In this step, the first preset fault parameter rule in the embodiment provided in the present application can be specifically determined to limit the number of fault parameters to 1. At this time, when it is determined that the number of fault parameters exists (that is, 1), it is determined that the power battery uses the first target thermal runaway regulation strategy to regulate thermal runaway, that is, only the cooling water pump is started to cool the battery pack and suppress the heat expansion between the battery cells. The thermal runaway information in the power battery will not be sent to the driver, and the high voltage of the power battery will not be cut off.

[0050] Sub-step 1023: If it is determined that the number of parameters satisfies the second preset fault parameter rule, determine that the target thermal runaway regulation strategy for the power battery is the second target thermal runaway regulation strategy, wherein the second preset fault parameter rule is used to characterize a second limiting rule corresponding to the number of fault parameters.

[0051] In this step, the second preset fault parameter rule in the embodiment provided in the present application can be specifically determined to limit the number of fault parameters to 2. At this time, when the number of fault parameters is determined to be any two, it is determined that the power battery uses the second target thermal runaway regulation strategy to regulate thermal runaway, that is, while starting the cooling water pump to cool the battery pack and suppressing the heat expansion between the battery cells, the thermal runaway information in the power battery is sent to the driver and the high voltage of the power battery is cut off.

[0052] In one embodiment, step S103 includes the following sub-steps: Sub-step 1031 : According to the first target thermal runaway regulation strategy, control the cooling water pump to start, and perform thermal runaway regulation on the power battery.

[0053] In this step, the first target thermal runaway regulation strategy in the embodiment provided in the present application is specifically to control the cooling water pump to turn on, and start the cooling water pump to cool the battery pack, thereby suppressing the thermal expansion between the battery cells.

[0054] Sub-step 1032: According to the second target thermal runaway regulation strategy, the cooling water pump is controlled to start, the high voltage of the power battery is cut off, and a prompt message is issued simultaneously.

[0055] In this step, the second target thermal runaway regulation strategy in the embodiment provided in the present application is specifically to send thermal runaway information in the power battery to the operator / driver (which can be specific but not limited to the BMS sending an alarm signal to the vehicle controller) while controlling the cooling water pump to start, and cut off the high voltage of the power battery to ensure that there is no heat spread between the battery cells, thereby avoiding the false alarm rate of the BMS system signal.

[0056] Sub-step 1033: After the cooling water pump is turned on for a preset time, the cooling water pump is controlled to be turned off, and after the cooling water pump is turned off, it is determined whether the power battery is in a thermal runaway state.

[0057] In this step, in order to further reduce the false alarms that are easily caused when a single target attribute parameter is triggered and the energy loss caused by the continuous activation of the cooling water cooling, the embodiment provided by the present application also limits the duration of the cooling water pump being turned on. When the cooling water pump is turned on for more than the preset time, it is necessary to determine whether the power battery is in a thermal runaway state. If it is determined that the four types of target attribute parameters are not continuously triggered at this time, the cooling water pump will be controlled to be turned off and the battery pack cooling will be exited.

[0058] Among them, the preset time in the embodiment provided in the present application can be customized according to different application scenarios. It is assumed that the preset time in the embodiment provided in the present application is specifically set to 5 minutes.

[0059] See also Figure 2 , Figure 2 This is a flowchart of an embodiment of a method for monitoring thermal runaway of a power battery provided in an embodiment of the present application, such as Figure 2 As shown, the specific steps are as follows: First, the battery cell’s voltage, battery cell’s temperature, internal pressure, and signal acquisition / transmission parameters are collected.

[0060] Then, it is determined whether any one target attribute parameter fails, and whether any two or more than two target attribute parameter fails.

[0061] Then, if any one target attribute parameter fails, or any two or more target attribute parameter fails, it is determined that the power battery is in a thermal runaway state; if no one target attribute parameter fails, or any two or more target attribute parameter fails, it is determined that the power battery is not in a thermal runaway state.

[0062] Next, when it is determined that the power battery is not in a thermal runaway state, it is determined whether to start thermal management. If so, the coolant circulation water pump is started; if not, the coolant circulation water pump is turned off.

[0063] Then, in the event of a failure in any one of the target attribute parameters, the coolant circulation water pump is started.

[0064] Then, in the event of any two or more target attribute parameter failures, the coolant circulation pump is started, the high voltage of the power battery is cut off, and a prompt is simultaneously given to the operator of the vehicle to be tested.

[0065] Finally, after the coolant circulating water pump has been turned on for more than 5 minutes, turn off the coolant circulating water pump.

[0066] The method for monitoring thermal runaway of a power battery provided in an embodiment of the present application, compared with the prior art, determines whether the power battery in the vehicle to be detected is in a thermal runaway state based on the target attribute parameters of the vehicle to be detected, and when the power battery is in a thermal runaway state, determines a target thermal runaway adjustment strategy for the power battery based on the target attribute parameters and preset fault parameter rules, and then performs thermal runaway adjustment on the power battery based on the target thermal runaway adjustment strategy to complete the monitoring of thermal runaway in the power battery. The present application improves the thermal runaway adjustment of the power battery. While improving accuracy, the probability of false alarms of thermal runaway is greatly reduced. At the same time, the early start of the cooling water pump helps to delay, inhibit, or even prevent the heat diffusion of the single battery cell to the surrounding battery cells, greatly improving the escape time of passengers and drivers. In addition, this scheme takes into account that only one target thermal runaway adjustment strategy adjusts the thermal runaway state of the power battery, which may cause false alarms. At this time, if an alarm message is still sent to the driver, it will cause panic among the passengers. If this false alarm is triggered frequently, it will reduce the driver's vigilance. Therefore, it is chosen not to send an alarm message, but only to turn on the cooling water pump, thereby improving the passenger experience.

[0067] See also Figure 3 , Figure 3 A structural block diagram of a power battery thermal runaway monitoring device provided in an embodiment of the present application, such as Figure 3 As shown, the monitoring device 300 for thermal runaway of a power battery includes: The first determination module 310 is used to determine whether the power battery in the vehicle to be detected is in a thermal runaway state based on the target attribute parameters of the vehicle to be detected, wherein the target attribute parameters are used to characterize multiple safety monitoring attribute parameters corresponding to the power battery.

[0068] The second determination module 320 is used to determine a target thermal runaway regulation strategy for the power battery based on target attribute parameters and preset fault parameter rules if the power battery is in a thermal runaway state, wherein the target thermal runaway regulation strategy is a selected one of the two thermal runaway regulation strategies.

[0069] The regulating module 330 is used to perform thermal runaway regulation on the power battery based on the target thermal runaway regulation strategy to complete the monitoring of thermal runaway in the power battery.

[0070] In one embodiment, the target attribute parameters include signal acquisition / transmission parameters, and the first determination module 310 is specifically configured to: Determine whether there is a fault in the signal acquisition / transmission parameters.

[0071] If the signal acquisition / transmission parameters fail, it is determined that the power battery in the detection vehicle is in a thermal runaway state.

[0072] In one embodiment, the target attribute parameter further includes at least one battery cell attribute parameter, and the first determination module 310 is further specifically configured to: Determine whether there is a fault in the attribute parameters of each battery cell.

[0073] If any of the battery cell attribute parameters fails, it is determined that the power battery in the detection vehicle is in a thermal runaway state.

[0074] In one embodiment, the preset fault parameter rule includes a first preset fault parameter rule, the target thermal runaway regulation strategy includes a first target thermal runaway regulation strategy, and the second determination module 320 is specifically used to: If the power battery is in a thermal runaway state, the number of faulty parameters in the target attribute parameters is determined.

[0075] If it is determined that the number of parameters satisfies the first preset fault parameter rule, the target thermal runaway regulation strategy for the power battery is determined to be the first target thermal runaway regulation strategy, wherein the first preset fault parameter rule is used to characterize a first limiting rule corresponding to the number of fault parameters.

[0076] In one embodiment, the preset fault parameter rule includes a second preset fault parameter rule, the target thermal runaway regulation strategy includes a second target thermal runaway regulation strategy, and the second determination module 320 is further specifically used to: If the power battery is in a thermal runaway state, the number of faulty parameters in the target attribute parameters is determined.

[0077] If it is determined that the number of parameters satisfies the second preset fault parameter rule, the target thermal runaway regulation strategy for the power battery is determined to be the second target thermal runaway regulation strategy, wherein the second preset fault parameter rule is used to characterize a second limiting rule corresponding to the number of fault parameters.

[0078] In one embodiment, the adjustment module 330 is specifically configured to: According to the first target thermal runaway regulation strategy, the cooling water pump is controlled to start and the power battery is regulated for thermal runaway.

[0079] After the cooling water pump is turned on for a preset time, the cooling water pump is controlled to be turned off, and after the cooling water pump is turned off, it is re-determined whether the power battery is in a thermal runaway state.

[0080] In one embodiment, the adjustment module 330 is further specifically configured to: According to the second target thermal runaway regulation strategy, the cooling water pump is controlled to start, the high voltage of the power battery is cut off, and a prompt message is sent simultaneously to the operating personnel of the vehicle to be tested.

[0081] After the cooling water pump is turned on for a preset time, the cooling water pump is controlled to be turned off, and after the cooling water pump is turned off, it is re-determined whether the power battery is in a thermal runaway state.

[0082] The power battery thermal runaway monitoring device 300 provided in the embodiment of the present application, compared with the prior art, determines whether the power battery in the vehicle to be detected is in a thermal runaway state based on the target attribute parameters of the vehicle to be detected, and when the power battery is in a thermal runaway state, determines the target thermal runaway adjustment strategy for the power battery based on the target attribute parameters and preset fault parameter rules, and then performs thermal runaway adjustment on the power battery based on the target thermal runaway adjustment strategy to complete the monitoring of thermal runaway in the power battery. The present application improves the thermal runaway control of the power battery. While improving the adjustment accuracy, the probability of false alarm of thermal runaway is greatly reduced. At the same time, the early start of the cooling water pump helps to delay, inhibit or even prevent the heat diffusion from the single battery cell to the surrounding battery cells, greatly improving the escape time of passengers and drivers. In addition, this scheme takes into account that only one target thermal runaway adjustment strategy adjusts the thermal runaway state of the power battery, which may cause false alarms. At this time, if an alarm message is still sent to the driver, it will cause panic among passengers. If this false alarm is triggered frequently, it will reduce the driver's vigilance. Therefore, it is chosen not to send an alarm message, but only to turn on the cooling water pump, thereby improving the passenger experience.

[0083] See also Figure 4 , Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application is shown in FIG. Figure 4 As shown, the electronic device 400 includes a processor 410 , a memory 420 , and a bus 430 .

[0084] The memory 420 stores machine-readable instructions executable by the processor 410. When the electronic device 400 is running, the processor 410 communicates with the memory 420 via the bus 430. When the machine-readable instructions are executed by the processor 410, the above-mentioned Figure 1 to Figure 2 The steps of the method for monitoring thermal runaway of a power battery in the method embodiment shown and the specific implementation thereof can be referred to the method embodiment, which will not be described in detail here.

[0085] The present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the computer program can execute the above-mentioned Figure 1 to Figure 2 The steps of the method for monitoring thermal runaway of a power battery in the method embodiment shown and the specific implementation thereof can be referred to the method embodiment, which will not be described in detail here.

[0086] Figure 5 FIG. 1 shows a schematic diagram of the structure of a vehicle monitoring device provided in an embodiment of the present application. For example, Figure 5 As shown, the vehicle monitoring device 50 includes a computer-readable storage medium 600 and the electronic device 400 described in the second aspect. The specific implementation method can refer to the embodiments of the computer-readable storage medium 600 and the electronic device 400, which will not be repeated here.

[0087] Exemplarily, the aluminum electrolysis cell equipment may further include a computer-readable storage medium 600 . The specific implementation method may refer to the embodiment of the computer-readable storage medium 600 , which will not be described in detail here.

[0088] Exemplarily, the aluminum electrolysis cell equipment may further include an electronic device 400 . The specific implementation method may refer to the embodiment of the electronic device 400 , which will not be described in detail here.

[0089] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0090] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0091] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-readable program code.

[0092] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0093] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0094] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0095] An embodiment of the present application also provides a computer program product, which includes computer software instructions. When the computer software instructions are executed on a processing device, the processing device executes a process of a method for monitoring thermal runaway of a power battery.

[0096] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can store or a data storage device such as a server or a data center that includes one or more available media integration. The available medium can be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state drive (SSD)), etc.

[0097] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0098] In the several embodiments provided in the present application, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0099] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0100] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0101] If the integrated unit is implemented in the form of 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 the present application is essentially 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, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0102] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0103] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0104] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalents, this specification is also intended to include these modifications and variations.

Claims

1. A method for monitoring thermal runaway of a power battery, characterized in that: include: Determining whether a power battery in the vehicle to be detected is in a thermal runaway state based on a target attribute parameter of the vehicle to be detected, wherein the target attribute parameter is used to characterize a plurality of safety monitoring attribute parameters corresponding to the power battery; If the power battery is in a thermal runaway state, determining a target thermal runaway regulation strategy for the power battery based on the target attribute parameter and a preset fault parameter rule, wherein the target thermal runaway regulation strategy is a selected one of two thermal runaway regulation strategies; Based on the target thermal runaway regulation strategy, thermal runaway regulation is performed on the power battery.

2. The method for monitoring thermal runaway of a power battery according to claim 1, characterized in that: The target attribute parameters include signal acquisition / transmission parameters, and determining whether the power battery in the vehicle to be detected is in a thermal runaway state based on the target attribute parameters of the vehicle to be detected includes: Determine whether there is a fault in the signal acquisition / transmission parameters; If the signal acquisition / transmission parameter fails, it is determined that the power battery in the detection vehicle is in a thermal runaway state.

3. The method for monitoring thermal runaway of a power battery according to claim 2, characterized in that: The target attribute parameter also includes at least one battery cell attribute parameter. Based on the target attribute parameter of the vehicle to be detected, determining whether the power battery in the vehicle to be detected is in a thermal runaway state also includes: Determine whether each battery cell attribute parameter has a fault; If any one of the battery cell attribute parameters fails, it is determined that the power battery in the detection vehicle is in a thermal runaway state.

4. The method for monitoring thermal runaway of a power battery according to claim 1, characterized in that: The preset fault parameter rule includes a first preset fault parameter rule, the target thermal runaway regulation strategy includes a first target thermal runaway regulation strategy, and if the power battery is in a thermal runaway state, determining a target thermal runaway regulation strategy for the power battery based on the target attribute parameter and the preset fault parameter rule, including: If the power battery is in a thermal runaway state, the number of faulty parameters in the target attribute parameters is determined; If it is determined that the number of parameters satisfies a first preset fault parameter rule, the target thermal runaway regulation strategy for the power battery is determined to be a first target thermal runaway regulation strategy, wherein the first preset fault parameter rule is used to characterize a first limiting rule corresponding to the number of fault parameters.

5. The method for monitoring thermal runaway of a power battery according to claim 4, characterized in that: The preset fault parameter rule includes a second preset fault parameter rule, the target thermal runaway regulation strategy includes a second target thermal runaway regulation strategy, and if the power battery is in a thermal runaway state, determining a target thermal runaway regulation strategy for the power battery based on the target attribute parameter and the preset fault parameter rule, further comprising: If the power battery is in a thermal runaway state, the number of faulty parameters in the target attribute parameters is determined; If it is determined that the number of parameters satisfies a second preset fault parameter rule, the target thermal runaway regulation strategy for the power battery is determined to be a second target thermal runaway regulation strategy, wherein the second preset fault parameter rule is used to characterize a second limiting rule corresponding to the number of fault parameters.

6. The method for monitoring thermal runaway of a power battery according to claim 4, characterized in that: The step of performing thermal runaway regulation on the power battery based on the target thermal runaway regulation strategy includes: According to the first target thermal runaway regulation strategy, controlling the cooling water pump to start, and performing thermal runaway regulation on the power battery; After the cooling water pump is turned on for a preset time, controlling the cooling water pump to be turned off; After the cooling water pump is turned off, it is determined whether the power battery is in a thermal runaway state.

7. The method for monitoring thermal runaway of a power battery according to claim 5, characterized in that: The step of performing thermal runaway regulation on the power battery based on the target thermal runaway regulation strategy further includes: According to the second target thermal runaway regulation strategy, the cooling water pump is controlled to start, the high voltage of the power battery is cut off, and a prompt message is issued simultaneously; After the cooling water pump is turned on for a preset time, controlling the cooling water pump to be turned off; After the cooling water pump is turned off, it is determined whether the power battery is in a thermal runaway state.

8. An electronic device, characterized in that: include: A processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate through the bus, and the machine-readable instructions are executed by the processor to perform the steps of the method for monitoring thermal runaway of a power battery as described in any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for monitoring thermal runaway of a power battery as described in any one of claims 1 to 7 are executed.

10. A vehicle monitoring device, characterized in that: comprising; the electronic device as claimed in claim 8; and / or, the computer-readable storage medium as claimed in claim 9.

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