Thermal runaway control method and device, battery system and storage medium

Abstract

The invention discloses a thermal runaway control method and device, a battery system and a storage medium, and the method comprises the steps: obtaining a pre-starting request of a thermal management system of the battery system, the pre-starting request being used for representing that an energy storage battery of the battery system meets a thermal runaway early warning condition and does not meet a thermal runaway alarm condition; in response to the pre-starting request, controlling the heat management system to circularly cool the energy storage battery at first cooling power; when the energy storage battery does not meet the thermal runaway alarm condition and the sampling temperature is smaller than or equal to the temperature threshold value, the thermal management system is controlled to stop circulating cooling of the energy storage battery; and under the condition that it is determined that the energy storage battery meets the thermal runaway alarm condition within the preset duration, the thermal management system is controlled to circularly cool the energy storage battery with second cooling power. According to the method, under the condition of thermal runaway of the energy storage battery, the thermal management system is controlled to circularly cool the energy storage battery with relatively high cooling power, so that the safety risk of the energy storage battery can be reduced.

Description

Technical Field

[0001] The present application belongs to the field of thermal management technology, and in particular, relates to a thermal runaway control method and a control device thereof, a battery system and a storage medium. Background Art

[0002] As global environmental and energy issues become increasingly serious, the development of the international electric industry is accelerating. Battery systems including energy storage batteries are widely used in people's lives and production today, such as electric vehicles and energy storage systems.

[0003] At present, with the increasing application demand of energy storage batteries, the energy density requirements of energy storage batteries are getting higher and higher, and the frequency of thermal runaway of energy storage batteries is also getting higher and higher. During the thermal runaway process, energy storage batteries will release a lot of heat, and the battery temperature of energy storage batteries will rise sharply, resulting in increased safety risks of energy storage batteries. Therefore, how to reduce the safety risks of energy storage batteries has become an urgent problem to be solved. Summary of the invention

[0004] In view of this, the embodiments of the present application provide a thermal runaway control method and a control device thereof, a battery system and a storage medium to overcome the above problems of the prior art.

[0005] In a first aspect, an embodiment of the present application provides a thermal runaway control method, comprising: Obtaining a pre-start request of a thermal management system of a battery system, wherein the pre-start request is used to indicate that an energy storage battery of the battery system has met a thermal runaway warning condition, but has not met a thermal runaway alarm condition, wherein the thermal runaway warning condition is that at least one of a plurality of sampled parameters of the battery system is an abnormal parameter, and the thermal runaway alarm condition is that each of the plurality of sampled parameters is the abnormal parameter; In response to the pre-start request, controlling the thermal management system to cyclically cool the energy storage battery at a first cooling power; When the energy storage battery does not meet the thermal runaway alarm condition and the sampling temperature in the multiple sampling parameters is less than or equal to the temperature threshold, controlling the thermal management system to stop cyclic cooling of the energy storage battery; When it is determined within a preset time period that the energy storage battery has satisfied the thermal runaway alarm condition, the thermal management system is controlled to perform cyclic cooling on the energy storage battery at a second cooling power, and the first cooling power is less than the second cooling power.

[0006] The solution provided in the present application controls the thermal management system to perform cyclic cooling on the energy storage battery with a larger cooling power when thermal runaway occurs in the energy storage battery, which can quickly reduce the battery temperature of the energy storage battery and is beneficial to reducing the safety risk of the energy storage battery.

[0007] When the energy storage battery has not experienced thermal runaway and the sampling parameters are abnormal, controlling the thermal management system to circulate cooling of the energy storage battery with a smaller cooling power can suppress the problem of the energy storage battery being seriously damaged due to temperature increase before the energy storage battery is identified as thermal runaway, which is conducive to further reducing the safety risks of the energy storage battery.

[0008] When the energy storage battery does not experience thermal runaway and the sampling temperature is less than or equal to the temperature threshold, the thermal management system is controlled to stop working, which reduces the power consumption of the battery system and is conducive to improving the energy efficiency utilization of the battery system.

[0009] Wherein, in some optional embodiments, the thermal runaway control method further includes: When it is determined that the energy storage battery does not meet the thermal runaway alarm condition within the preset time period, the thermal management system is controlled to stop cyclic cooling of the energy storage battery.

[0010] The solution provided in this embodiment controls the thermal management system to stop working when the energy storage battery has not experienced thermal runaway within a preset time, thereby reducing the power consumption of the battery system and helping to improve the energy efficiency utilization rate of the battery system.

[0011] In some optional embodiments, the battery system is an electric vehicle, and after determining that the energy storage battery has met the thermal runaway alarm condition within the preset time, controlling the thermal management system to cyclically cool the energy storage battery at a second cooling power, the thermal runaway control method further includes: determining a vehicle state of the electric vehicle; When it is determined that the vehicle state is a driving state, a braking system of the electric vehicle is controlled to brake the electric vehicle.

[0012] The solution provided in this embodiment performs braking control on the electric vehicle when the energy storage battery of the electric vehicle suffers thermal runaway and the electric vehicle is in driving state, which can suppress the occurrence of collision accidents caused by thermal runaway of the electric vehicle and improve the driving safety of the electric vehicle.

[0013] Wherein, in some optional embodiments, before the thermal management system is controlled to cyclically cool the energy storage battery at a first cooling power in response to the pre-start request, the thermal runaway control method further includes: The low-voltage power supply or the high-voltage power supply or the engine of the battery system is controlled to supply power to the thermal management system, so that the thermal management system is switched from a shutdown state to a working state.

[0014] The solution provided in this embodiment is that the battery system controls the thermal management system to be in a power-off state before a thermal runaway warning occurs, which can reduce the power consumption of the battery system. In the event of a thermal runaway warning, the low-voltage power supply or the high-voltage power supply or the engine is controlled to provide power to the thermal management system, so that the thermal management system is switched from a shutdown state to an operating state, which is beneficial to improving the control success rate of the thermal management system.

[0015] Wherein, in some optional embodiments, obtaining a pre-start request of a thermal management system of a battery system includes: Acquire the multiple sampling parameters collected by the battery management system; When the plurality of sampling parameters satisfy the thermal runaway warning condition but do not satisfy the thermal runaway alarm condition, the pre-start request is generated.

[0016] The solution provided in this embodiment generates a pre-start request when it is determined that multiple sampling parameters have satisfied the thermal runaway warning condition but have not satisfied the thermal runaway alarm condition, which is beneficial to improving the accuracy of obtaining the pre-start request.

[0017] Wherein, in some optional embodiments, obtaining a pre-start request of a thermal management system of a battery system includes: The pre-start request reported by the battery management system is received, where the pre-start request is generated based on the battery management system determining that the multiple sampled parameters collected have satisfied the thermal runaway warning condition but have not satisfied the thermal runaway alarm condition.

[0018] The solution provided in this embodiment obtains a pre-start request from a battery management system, and the pre-start request is generated based on the battery management system's judgment that multiple sampling parameters have met the thermal runaway warning conditions but have not met the thermal runaway alarm conditions, which is beneficial to improving the accuracy of obtaining the pre-start request.

[0019] Wherein, in some optional embodiments, the thermal runaway control method further includes: When it is determined that the energy storage battery has met the thermal runaway alarm condition, an alarm message is generated and sent to a preset client.

[0020] The solution provided in this embodiment generates and sends an alarm message to a preset client when it is determined that the energy storage battery has met the thermal runaway alarm condition, so as to remind the user to process the energy storage battery according to the alarm message, which is beneficial to improving the operating safety of the battery system.

[0021] In a second aspect, an embodiment of the present application provides a thermal runaway control device, comprising: an acquisition module, used for acquiring a pre-start request of a thermal management system of a battery system, wherein the pre-start request is used for indicating that an energy storage battery of the battery system has satisfied a thermal runaway warning condition, but has not satisfied a thermal runaway alarm condition, wherein the thermal runaway warning condition is that at least one of a plurality of sampling parameters of the battery system is an abnormal parameter, and the thermal runaway alarm condition is that each of the plurality of sampling parameters is the abnormal parameter; A first control module, configured to control the thermal management system to cyclically cool the energy storage battery at a first cooling power in response to the pre-start request; A second control module is used to control the thermal management system to stop cyclic cooling of the energy storage battery when the energy storage battery does not meet the thermal runaway alarm condition and the sampling temperature in the multiple sampling parameters is less than or equal to the temperature threshold; The third control module is used to control the thermal management system to cyclically cool the energy storage battery with a second cooling power when it is determined that the energy storage battery has met the thermal runaway alarm condition within a preset time period, and the first cooling power is less than the second cooling power.

[0022] In a third aspect, an embodiment of the present application provides a battery system, including: Memory; One or more processors, coupled to the memory; One or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the one or more processors, and the one or more applications are configured to execute the thermal runaway control method provided in the first aspect above.

[0023] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, in which a program code is stored. The program code can be called by a processor to execute the thermal runaway control method provided in the first aspect above.

[0024] In a fifth aspect, an embodiment of the present application provides a computer program product, which, when executed on a computer device, enables the computer device to execute the thermal runaway control method provided in the first aspect above.

[0025] It can be understood that the beneficial effects of the second to fifth aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of a scenario of a battery system provided in an embodiment of the present application is shown.

[0028] Figure 2 A schematic flow chart of a thermal runaway control method provided in an embodiment of the present application is shown.

[0029] Figure 3 Another schematic flow chart of the thermal runaway control method provided in an embodiment of the present application is shown.

[0030] Figure 4 A scenario flow diagram of a thermal runaway control method provided in an embodiment of the present application is shown.

[0031] Figure 5 Another schematic flow chart of the thermal runaway control method provided in an embodiment of the present application is shown.

[0032] Figure 6 Another schematic flow chart of the thermal runaway control method provided in an embodiment of the present application is shown.

[0033] Figure 7 A structural block diagram of a thermal runaway control device provided in an embodiment of the present application is shown.

[0034] Figure 8 A functional block diagram of a battery system provided in an embodiment of the present application is shown.

[0035] Fig. 9 A computer-readable storage medium provided in an embodiment of the present application for storing or carrying a program code for implementing a thermal runaway control method provided in an embodiment of the present application is shown.

[0036] Fig.10 A computer program product provided in an embodiment of the present application and used for storing or carrying program codes for implementing the thermal runaway control method provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0037] In order to make the purpose, features, and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described below are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0039] It should also be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural forms unless the context clearly indicates other working conditions.

[0040] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0041] In addition, in the description of the present application, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0042] As global environmental and energy issues become increasingly serious, the development of the international electric industry is accelerating. Battery systems including energy storage batteries are widely used in people's lives and production today, such as electric vehicles and energy storage systems.

[0043] At present, with the increasing application demand of energy storage batteries, the energy density requirements of energy storage batteries are getting higher and higher, and the frequency of thermal runaway of energy storage batteries is also getting higher and higher. During the thermal runaway process, energy storage batteries will release a lot of heat, and the battery temperature of energy storage batteries will rise sharply, resulting in increased safety risks of energy storage batteries. Therefore, how to reduce the safety risks of energy storage batteries has become an urgent problem to be solved.

[0044] In view of the above problems, the thermal runaway control method and control device thereof, the battery system and the storage medium provided in the embodiments of the present application obtain a pre-start request of the thermal management system of the battery system, the pre-start request is used to indicate that the energy storage battery of the battery system has met the thermal runaway warning condition and has not met the thermal runaway alarm condition, the thermal runaway warning condition is that at least one sampling parameter among multiple sampling parameters of the battery system is an abnormal parameter, and the thermal runaway alarm condition is that each sampling parameter among multiple sampling parameters is an abnormal parameter, and in response to the pre-start request, the thermal management system is controlled to perform cyclic cooling on the energy storage battery with a first cooling power, and when the energy storage battery does not meet the thermal runaway alarm condition and the sampling temperature among the multiple sampling parameters is less than or equal to the temperature threshold, the thermal management system is controlled to stop cyclic cooling on the energy storage battery, and when it is determined within a preset time that the energy storage battery has met the thermal runaway alarm condition, the thermal management system is controlled to perform cyclic cooling on the energy storage battery with a second cooling power, the first cooling power being less than the second cooling power, so that when the energy storage battery has thermal runaway, the thermal management system is controlled to perform cyclic cooling on the energy storage battery with a larger cooling power, which can quickly reduce the battery temperature of the energy storage battery, which is beneficial to reducing the safety risk of the energy storage battery.

[0045] When the energy storage battery has not experienced thermal runaway and the sampling parameters are abnormal, controlling the thermal management system to circulate cooling of the energy storage battery with a smaller cooling power can suppress the problem of the energy storage battery being seriously damaged due to temperature increase before the energy storage battery is identified as thermal runaway, which is conducive to further reducing the safety risks of the energy storage battery.

[0046] When the energy storage battery does not experience thermal runaway and the sampling temperature is less than or equal to the temperature threshold, the thermal management system is controlled to stop working, which reduces the power consumption of the battery system and is conducive to improving the energy efficiency utilization of the battery system.

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0048] See also Figure 1 , which shows a schematic diagram of an application scenario of the battery system provided in an embodiment of the present application. The battery system may include an energy storage battery 100, a thermal management system 200 and a main control device 300.

[0049] The battery system may include but is not limited to any one of an energy storage system or an electric vehicle.

[0050] The energy storage battery 100 can be used to provide electrical energy for the battery system. The energy storage battery 100 can include but is not limited to any one of lithium batteries, lead-acid batteries, nickel-cadmium batteries, nickel-metal hydride batteries, zinc-silver batteries, iron-chromium liquid flow batteries and all-vanadium liquid flow batteries.

[0051] The thermal management system 200 may be used to perform cyclic cooling on the energy storage battery 100 . The thermal management system 200 may include, but is not limited to, at least one of a steam circulation cooling system and a liquid circulation cooling system.

[0052] As an example, the liquid circulation cooling system may include a liquid storage tank, a coolant, and a circulation pump. The liquid storage tank may be used to store the coolant, and the circulation pump may be connected to the liquid storage tank through a pipeline.

[0053] The liquid storage tank may include but is not limited to any one of a stainless steel liquid storage tank, a glass liquid storage tank or a plastic liquid storage tank.

[0054] The coolant may be used to circulate and cool the energy storage battery 100 , and the coolant may include but is not limited to any one of cooling water, deionized coolant, or organic coolant.

[0055] The circulation pump can be used to circulate the coolant stored in the liquid storage tank to the pipeline at the energy storage battery 100 to circulate and cool the energy storage battery 100 .

[0056] The circulation pump may include, but is not limited to, any one of an electric circulation pump, a pneumatic circulation pump, or a hydraulic circulation pump.

[0057] The main control device 300 can be communicatively connected to the thermal management system 200 , and is used to control the thermal management system 200 to perform cyclic cooling on the energy storage battery 100 .

[0058] The main control device 300 may include but is not limited to any one of a vehicle control unit (VCU) or an energy storage controller.

[0059] The energy storage controller may include but is not limited to any one of a server or a terminal device.

[0060] The server may include but is not limited to an independent physical server, a server cluster or distributed system consisting of multiple physical servers, and a cloud server.

[0061] Terminal devices may include but are not limited to mobile terminal devices (e.g., mobile phones, PDAs, tablet PCs, laptops, smart watches, smart bracelets, etc.) or fixed terminal devices (e.g., desktop computers, smart panels, all-in-one computers, etc.).

[0062] In some embodiments, the battery system may further include a battery management system (BMS) 400. The BMS 400 is communicatively connected to the main control device 300 and exchanges data with the main control device 300. The BMS 400 may be used to sample parameters of the battery system to obtain multiple sampling parameters.

[0063] The sampling parameters may include but are not limited to any one of sampling voltage, sampling current, sampling temperature, sampling air pressure, sampling smoke concentration or abnormal sampling frequency.

[0064] In some embodiments, the battery system may further include a low-voltage power supply 500 , which is communicatively connected to the main control device 300 and exchanges data with the main control device 300 . The low-voltage power supply 500 may be electrically connected to the thermal management system 200 .

[0065] See also Figure 2 , which shows a flow chart of a thermal runaway control method provided by an embodiment of the present application. In a specific embodiment, the thermal runaway control method can be applied to Figure 1 The main control device 300 in the battery system shown in FIG. Figure 2 The process shown is described in detail, and the thermal runaway control method may include the following steps 101 to 104.

[0066] Step 101: Obtain a pre-start request of a thermal management system of a battery system.

[0067] In an embodiment of the present application, the main control device may obtain a pre-startup request of the thermal management system of the battery system, and the pre-startup request may be used to instruct the main control device to control the thermal management system to start working.

[0068] Among them, the pre-start request can be used to indicate that the energy storage battery of the battery system has met the thermal runaway warning condition but has not met the thermal runaway alarm condition.

[0069] The thermal runaway warning condition may be that at least one sampling parameter among multiple sampling parameters of the battery system is an abnormal parameter, and the thermal runaway alarm condition may be that each sampling parameter among the multiple sampling parameters is an abnormal parameter.

[0070] The sampling parameter is an abnormal parameter, which means that the sampling parameter is greater than the corresponding parameter threshold. The parameter threshold can be used to characterize the maximum sampling parameter of the energy storage battery in a non-thermal runaway state.

[0071] In some embodiments, the battery system may further include a BMS. The main control device may obtain multiple sampling parameters collected by the BMS, and generate a pre-start request when the multiple sampling parameters have met the thermal runaway warning condition but have not met the thermal runaway alarm condition. When it is determined that the multiple sampling parameters have met the thermal runaway warning condition but have not met the thermal runaway alarm condition, a pre-start request is generated, which is beneficial to improving the accuracy of obtaining the pre-start request.

[0072] Among them, multiple sampling parameters have met the thermal runaway warning condition and have not met the thermal runaway alarm condition, indicating that at least one sampling parameter among the multiple sampling parameters is an abnormal parameter, and at least one sampling parameter among the multiple sampling parameters is a normal parameter.

[0073] Regarding the process of the main control device acquiring the multiple sampling parameters collected by the BMS, as an implementation mode, the main control device can send a first acquisition instruction to the BMS, the BMS receives and responds to the first acquisition instruction, sends the multiple sampling parameters collected from the battery system to the main control device, and the main control device receives the multiple sampling parameters returned by the BMS.

[0074] Regarding the process in which the master control device acquires the multiple sampling parameters collected by the BMS, as an implementation mode, the BMS may periodically report the multiple sampling parameters collected from the battery system to the master control device, and the master control device receives the multiple sampling parameters reported by the BMS.

[0075] In some embodiments, the battery system may further include a BMS, which may perform parameter sampling on the battery system to obtain multiple sampling parameters, and upon determining that the multiple sampling parameters have satisfied the thermal runaway warning condition but have not satisfied the thermal runaway alarm condition, generate a pre-start request, and report the pre-start request to the main control device. The main control device receives the pre-start request reported by the BMS, obtains the pre-start request from the BMS, and the pre-start request is generated based on the BMS's determination that the multiple sampling parameters have satisfied the thermal runaway warning condition but have not satisfied the thermal runaway alarm condition, which is beneficial to improving the accuracy of obtaining the pre-start request.

[0076] Step 102: In response to the pre-start request, control the thermal management system to perform cyclic cooling on the energy storage battery at a first cooling power.

[0077] In an embodiment of the present application, the main control device can send a first control instruction to the thermal management system in response to a pre-start request. The thermal management system receives and responds to the first control instruction to cyclically cool the energy storage battery with a first cooling power.

[0078] In some embodiments, the thermal management system may be a liquid circulation cooling system, and the main control device may send a first control instruction to a circulation pump in the liquid circulation cooling system in response to a pre-start request. The circulation pump receives and responds to the first control instruction to control the cooling liquid to circulate and cool the energy storage battery at a first flow rate with a first cooling power.

[0079] In some embodiments, the thermal management system may be a steam circulation cooling system, and the main control device may send a first control instruction to the steam circulation cooling system in response to a pre-start request. The steam circulation cooling system receives and responds to the first control instruction to circulate cooling on the energy storage battery at a first cooling power.

[0080] Step 103: When the energy storage battery does not meet the thermal runaway alarm condition and the sampling temperature in the plurality of sampling parameters is less than or equal to the temperature threshold, control the thermal management system to stop cyclic cooling of the energy storage battery.

[0081] In the embodiment of the present application, when the energy storage battery does not meet the thermal runaway alarm condition and the sampling temperature in the multiple sampling parameters is less than or equal to the temperature threshold, the main control device can send a second control instruction to the thermal management system. The thermal management system receives and responds to the second control instruction to stop circulating cooling of the energy storage battery, thereby achieving the situation that when the energy storage battery does not have thermal runaway and the sampling temperature is less than or equal to the temperature threshold, the thermal management system is controlled to stop working, thereby reducing the power consumption of the battery system and facilitating improving the energy efficiency utilization rate of the battery system.

[0082] The temperature threshold can be used to characterize the maximum sampling temperature of the energy storage battery in a safe state. The temperature threshold can include but is not limited to a temperature preset by the user, or a temperature automatically generated by the main control device according to multiple thermal runaway control processes.

[0083] In some embodiments, the thermal management system may be a liquid circulation cooling system. When the energy storage battery does not meet the thermal runaway alarm condition and the sampling temperature in the multiple sampling parameters is less than or equal to the temperature threshold, the main control device may send a second control instruction to a circulation pump in the liquid circulation cooling system. The circulation pump receives and responds to the second control instruction and stops working, so that the coolant stops circulating and cooling the energy storage battery.

[0084] In some embodiments, the thermal management system may be a steam circulation cooling system. When the energy storage battery does not meet the thermal runaway alarm condition and the sampling temperature in the multiple sampling parameters is less than or equal to the temperature threshold, the main control device may send a second control instruction to the steam circulation cooling system. The steam circulation cooling system receives and responds to the second control instruction and stops circulating cooling of the energy storage battery.

[0085] Step 104: When it is determined within a preset time period that the energy storage battery has met the thermal runaway alarm condition, control the thermal management system to perform cyclic cooling on the energy storage battery at a second cooling power.

[0086] In the embodiment of the present application, when the main control device determines within a preset time that the energy storage battery has met the thermal runaway alarm condition, it can send a third control instruction to the thermal management system. The thermal management system receives and responds to the third control instruction to circulate cooling on the energy storage battery with a second cooling power. In this way, when thermal runaway occurs in the energy storage battery, the thermal management system is controlled to circulate cooling on the energy storage battery with a larger cooling power, which can quickly reduce the battery temperature of the energy storage battery and is beneficial to reducing the safety risk of the energy storage battery.

[0087] When the energy storage battery has not experienced thermal runaway and the sampling parameters are abnormal, controlling the thermal management system to circulate cooling of the energy storage battery with a smaller cooling power can suppress the problem of the energy storage battery being seriously damaged due to temperature increase before the energy storage battery is identified as thermal runaway, which is conducive to further reducing the safety risks of the energy storage battery.

[0088] When the energy storage battery does not experience thermal runaway and the sampling temperature is less than or equal to the temperature threshold, the thermal management system is controlled to stop working, which reduces the power consumption of the battery system and is conducive to improving the energy efficiency utilization of the battery system.

[0089] Wherein, when the master control device determines that the energy storage battery has met the thermal runaway alarm condition within the preset time, the sampled temperature is greater than the temperature threshold, and the first cooling power may be less than the second cooling power. The preset time may include but is not limited to the time pre-set by the user, or the time automatically generated by the master control device according to multiple thermal runaway control processes, etc.

[0090] As an example, the preset duration may be 5 minutes (min) or 10 minutes.

[0091] In some embodiments, the first cooling power may also be equal to the second cooling power, which means that before thermal runaway occurs in the energy storage battery, the thermal management system is controlled to cool the energy storage battery with a larger cooling power, thereby further improving the safety of the energy storage battery.

[0092] In some embodiments, the thermal management system may be a liquid circulation cooling system. When the main control device determines within a preset time period that the energy storage battery has met the thermal runaway alarm condition, it may send a third control instruction to a circulation pump in the liquid circulation cooling system. The circulation pump receives and responds to the third control instruction, and controls the cooling liquid to circulate and cool the energy storage battery at a second flow rate with a second cooling power.

[0093] The first flow rate may be smaller than the second flow rate.

[0094] In some embodiments, the thermal management system may be a steam circulation cooling system. When the main control device determines within a preset time period that the energy storage battery has met the thermal runaway alarm condition, it may send a third control instruction to the steam circulation cooling system. The steam circulation cooling system receives and responds to the third control instruction to circulate cooling of the energy storage battery at a second cooling power.

[0095] In some embodiments, when the main control device determines that the energy storage battery has met the thermal runaway alarm condition, it can generate and send an alarm message to a preset client associated with the user to remind the user to process the energy storage battery, which is beneficial to improving the operating safety of the battery system.

[0096] The warning information may include but is not limited to at least any one of sound warning information, text warning information or light warning information.

[0097] The preset client may include but is not limited to any one of a mobile client (for example, a mobile phone client, a PDA client, a Tablet PC client, a laptop client, a smart watch client, a smart bracelet client or a wearable client, etc.) or a fixed client (for example, a desktop computer client, a smart panel client, etc.).

[0098] The solution provided by the present application obtains a pre-start request of a thermal management system of a battery system, the pre-start request is used to characterize that an energy storage battery of the battery system has met a thermal runaway warning condition, but has not met a thermal runaway alarm condition, the thermal runaway warning condition is that at least one of a plurality of sampling parameters of the battery system is an abnormal parameter, and the thermal runaway alarm condition is that each of a plurality of sampling parameters is an abnormal parameter, and in response to the pre-start request, controls the thermal management system to perform cyclic cooling on the energy storage battery at a first cooling power, and when the energy storage battery does not meet the thermal runaway alarm condition and a sampling temperature in a plurality of sampling parameters is less than or equal to a temperature threshold, controls the thermal management system to stop cyclic cooling on the energy storage battery, and when it is determined within a preset time that the energy storage battery has met the thermal runaway alarm condition, controls the thermal management system to perform cyclic cooling on the energy storage battery at a second cooling power, the first cooling power being less than the second cooling power, so that when the energy storage battery has thermal runaway, the thermal management system is controlled to perform cyclic cooling on the energy storage battery at a larger cooling power, so that the battery temperature of the energy storage battery can be quickly reduced, which is beneficial to reducing the safety risk of the energy storage battery.

[0099] When the energy storage battery has not experienced thermal runaway and the sampling parameters are abnormal, controlling the thermal management system to circulate cooling of the energy storage battery with a smaller cooling power can suppress the problem of the energy storage battery being seriously damaged due to temperature increase before the energy storage battery is identified as thermal runaway, which is conducive to further reducing the safety risks of the energy storage battery.

[0100] When the energy storage battery does not experience thermal runaway and the sampling temperature is less than or equal to the temperature threshold, the thermal management system is controlled to stop working, which reduces the power consumption of the battery system and is conducive to improving the energy efficiency utilization of the battery system.

[0101] See also Figure 3 , which shows a flow chart of a thermal runaway control method provided by another embodiment of the present application. In a specific embodiment, the thermal runaway control method can be applied to Figure 1 The main control device 300 in the battery system shown in FIG. Figure 3 The process shown is described in detail, and the thermal runaway control method may include the following steps 201 to 203.

[0102] Step 201: Obtain a pre-start request of a thermal management system of a battery system.

[0103] Step 202: In response to the pre-start request, control the thermal management system to perform cyclic cooling on the energy storage battery at a first cooling power.

[0104] In this embodiment, step 201 and step 202 may refer to the contents of the corresponding steps in the aforementioned embodiment, and will not be described in detail here.

[0105] Step 203: When it is determined that the energy storage battery does not meet the thermal runaway alarm condition within the preset time period, the thermal management system is controlled to stop cyclic cooling of the energy storage battery.

[0106] In this embodiment, when the main control device determines that the energy storage battery does not meet the thermal runaway alarm condition within the preset time, it can send a fourth control instruction to the thermal management system. The thermal management system receives and responds to the fourth control instruction to stop circulating cooling of the energy storage battery. This achieves the situation that the energy storage battery still does not experience thermal runaway within the preset time, and controls the thermal management system to stop working, thereby reducing the power consumption of the battery system and helping to improve the energy efficiency utilization rate of the battery system.

[0107] In some embodiments, the thermal management system may be a liquid circulation cooling system. When the main control device determines that the energy storage battery does not meet the thermal runaway alarm conditions within a preset time period, it may send a fourth control instruction to a circulation pump in the liquid circulation cooling system. The circulation pump receives and responds to the fourth control instruction and stops working, so that the coolant stops circulating and cooling the energy storage battery.

[0108] In some embodiments, the thermal management system may be a steam circulation cooling system. When the main control device determines that the energy storage battery does not meet the thermal runaway alarm conditions within a preset time period, it may send a fourth control instruction to the steam circulation cooling system. The steam circulation cooling system receives and responds to the fourth control instruction to stop circulating cooling of the energy storage battery.

[0109] In one application scenario, such as Figure 4 As shown, the thermal runaway control method may include the following steps 301 to 305 .

[0110] Step 301: Obtain a pre-start request of a thermal management system of a battery system.

[0111] Step 302: In response to the pre-start request, control the thermal management system to perform cyclic cooling on the energy storage battery at a first cooling power.

[0112] Step 303: When the energy storage battery does not meet the thermal runaway alarm condition and the sampling temperature in the plurality of sampling parameters is less than or equal to the temperature threshold, control the thermal management system to stop cyclic cooling of the energy storage battery.

[0113] Step 304: When it is determined within a preset time period that the energy storage battery has met the thermal runaway alarm condition, control the thermal management system to perform cyclic cooling on the energy storage battery at a second cooling power.

[0114] Step 305: When it is determined that the energy storage battery does not meet the thermal runaway alarm condition within the preset time period, the thermal management system is controlled to stop cyclic cooling of the energy storage battery.

[0115] The solution provided in this embodiment obtains a pre-start request of the thermal management system of the battery system, and in response to the pre-start request, controls the thermal management system to perform cyclic cooling on the energy storage battery at a first cooling power, and controls the thermal management system to stop cyclic cooling on the energy storage battery when it is determined within a preset time that the energy storage battery does not meet the thermal runaway alarm condition. This achieves the situation where the thermal management system is controlled to perform cyclic cooling on the energy storage battery at a relatively low cooling power when thermal runaway does not occur in the energy storage battery and the sampling parameters are abnormal, which can suppress the problem of the energy storage battery being seriously damaged due to the temperature increase before the energy storage battery is identified as thermal runaway, and is conducive to reducing the safety risk of the energy storage battery.

[0116] If the energy storage battery has not experienced thermal runaway within a preset period of time, the thermal management system is controlled to stop working, which reduces the power consumption of the battery system and helps to improve the energy efficiency utilization of the battery system.

[0117] See also Figure 5, which shows a flow chart of a thermal runaway control method provided by another embodiment of the present application. In a specific embodiment, the thermal runaway control method can be applied to Figure 1 The VCU in the electric vehicle shown in the figure will be taken as an example below. Figure 5 The process shown is described in detail, and the thermal runaway control method may include the following steps 401 to 406.

[0118] Step 401: Obtain a pre-start request for a thermal management system of an electric vehicle.

[0119] Step 402: In response to the pre-start request, control the thermal management system to perform cyclic cooling on the energy storage battery at a first cooling power.

[0120] Step 403: When the energy storage battery does not meet the thermal runaway alarm condition and the sampling temperature in the plurality of sampling parameters is less than or equal to the temperature threshold, the thermal management system is controlled to stop cyclic cooling of the energy storage battery.

[0121] Step 404: When it is determined within a preset time period that the energy storage battery has met the thermal runaway alarm condition, control the thermal management system to perform cyclic cooling on the energy storage battery at a second cooling power.

[0122] In this embodiment, step 401, step 402, step 403 and step 404 may refer to the contents of the corresponding steps in the above-mentioned embodiment, which will not be described in detail here.

[0123] Step 405: Determine the vehicle state of the electric vehicle.

[0124] In this embodiment, the electric vehicle may further include a speedometer, which is communicatively connected to the VCU and exchanges data with the VCU. The speedometer may be used to measure the speed of the electric vehicle.

[0125] The VCU can send a second acquisition instruction to the speedometer, the speedometer receives and responds to the second acquisition instruction, measures the speed of the electric vehicle, and sends the speed to the VCU, the VCU receives and responds to the speed returned by the speedometer, and determines the vehicle state of the electric vehicle based on the speed.

[0126] The vehicle status may include a driving status and a parking status.

[0127] When the vehicle speed is greater than 0, the vehicle state of the electric vehicle is determined to be a driving state; when the vehicle speed is equal to 0, the vehicle state of the electric vehicle is determined to be a parking state.

[0128] Step 406: When it is determined that the vehicle state is the driving state, control the braking system of the electric vehicle to brake the electric vehicle.

[0129] In this embodiment, the electric vehicle may further include a braking system, which is communicatively connected to the VCU and exchanges data with the VCU. The braking system may be used to brake the electric vehicle.

[0130] When the VCU determines that the vehicle is in a driving state, it can send a fifth control instruction to the braking system. The braking system receives and responds to the fifth control instruction to brake the electric vehicle. This realizes braking control of the electric vehicle when thermal runaway occurs in the energy storage battery of the electric vehicle and the electric vehicle is in a driving state. This can suppress the occurrence of collision accidents caused by thermal runaway of the electric vehicle and improve the driving safety of the electric vehicle.

[0131] The solution provided in this embodiment obtains a pre-start request of the thermal management system of the electric vehicle, and in response to the pre-start request, controls the thermal management system to perform cyclic cooling on the energy storage battery with a first cooling power, and when the energy storage battery does not meet the thermal runaway alarm condition and the sampling temperature in the multiple sampling parameters is less than or equal to the temperature threshold, controls the thermal management system to stop cyclic cooling on the energy storage battery, and when it is determined within a preset time that the energy storage battery has met the thermal runaway alarm condition, controls the thermal management system to perform cyclic cooling on the energy storage battery with a second cooling power, determines the vehicle state of the electric vehicle, and when it is determined that the vehicle state is a driving state, controls the braking system of the electric vehicle to brake the electric vehicle, so that when the energy storage battery has thermal runaway, the thermal management system is controlled to perform cyclic cooling on the energy storage battery with a larger cooling power, which can quickly reduce the battery temperature of the energy storage battery, which is beneficial to reducing the safety risk of the energy storage battery.

[0132] When the energy storage battery has not experienced thermal runaway and the sampling parameters are abnormal, controlling the thermal management system to circulate cooling of the energy storage battery with a smaller cooling power can suppress the problem of the energy storage battery being seriously damaged due to temperature increase before the energy storage battery is identified as thermal runaway, which is conducive to further reducing the safety risks of the energy storage battery.

[0133] When the energy storage battery of an electric vehicle experiences thermal runaway and the electric vehicle is in motion, braking the electric vehicle can suppress the occurrence of collision accidents caused by thermal runaway of the electric vehicle, thereby improving the driving safety of the electric vehicle.

[0134] See also Figure 6 , which shows a flow chart of a thermal runaway control method provided by another embodiment of the present application. In a specific embodiment, the thermal runaway control method can be applied to Figure 1 The main control device 300 in the battery system shown in FIG. Figure 6The process shown is described in detail, and the thermal runaway control method may include the following steps 501 to 505.

[0135] Step 501: Obtain a pre-start request of a thermal management system of a battery system.

[0136] In this embodiment, step 501 may refer to the contents of the corresponding steps in the aforementioned embodiments, which will not be described in detail here.

[0137] Step 502: Control the low-voltage power supply or high-voltage power supply of the battery system or the engine to supply power to the thermal management system, so that the thermal management system switches from the shutdown state to the working state.

[0138] In this embodiment, the battery system may also include a low-voltage power supply, a high-voltage power supply and an engine. The main control device may send a sixth control instruction to the low-voltage power supply or the high-voltage power supply or the engine. The low-voltage power supply or the high-voltage power supply or the engine receives and responds to the sixth control instruction to supply power to the thermal management system so that the thermal management system switches from a shutdown state to a working state. Before a thermal runaway warning occurs, the battery system controls the thermal management system to be in a power-off state, which can reduce the power consumption of the battery system. In the event of a thermal runaway warning, the low-voltage power supply or the high-voltage power supply or the engine is controlled to provide electrical energy to the thermal management system so that the thermal management system switches from a shutdown state to a working state, which is beneficial to improving the control success rate of the thermal management system.

[0139] Step 503: In response to the pre-start request, control the thermal management system to perform cyclic cooling on the energy storage battery at a first cooling power.

[0140] Step 504: When the energy storage battery does not meet the thermal runaway alarm condition and the sampling temperature in the plurality of sampling parameters is less than or equal to the temperature threshold, control the thermal management system to stop cyclic cooling of the energy storage battery.

[0141] Step 505: When it is determined within a preset time period that the energy storage battery has met the thermal runaway alarm condition, control the thermal management system to perform cyclic cooling on the energy storage battery at a second cooling power.

[0142] In this embodiment, step 503, step 504 and step 505 may refer to the contents of the corresponding steps in the aforementioned embodiment, and will not be described in detail here.

[0143] The solution provided in this embodiment obtains a pre-start request of a thermal management system of a battery system, controls a low-voltage power supply or a high-voltage power supply or an engine of the battery system to power the thermal management system, and in response to the pre-start request, controls the thermal management system to perform cyclic cooling on the energy storage battery with a first cooling power, and controls the thermal management system to stop cyclic cooling on the energy storage battery when the energy storage battery does not meet the thermal runaway alarm condition and the sampling temperature in the multiple sampling parameters is less than or equal to the temperature threshold, and controls the thermal management system to perform cyclic cooling on the energy storage battery when it is determined within a preset time that the energy storage battery has met the thermal runaway alarm condition, controls the thermal management system to perform cyclic cooling on the energy storage battery with a second cooling power, so that when the energy storage battery has thermal runaway, the thermal management system is controlled to perform cyclic cooling on the energy storage battery with a larger cooling power, so that the battery temperature of the energy storage battery can be quickly reduced, which is beneficial to reducing the safety risk of the energy storage battery.

[0144] When the energy storage battery has not experienced thermal runaway and the sampling parameters are abnormal, controlling the thermal management system to circulate cooling of the energy storage battery with a smaller cooling power can suppress the problem of the energy storage battery being seriously damaged due to temperature increase before the energy storage battery is identified as thermal runaway, which is conducive to further reducing the safety risks of the energy storage battery.

[0145] Before a thermal runaway warning occurs, the battery system controls the thermal management system to be in a power-off state, which can reduce the power consumption of the battery system. In the event of a thermal runaway warning, the low-voltage power supply or high-voltage power supply or engine is controlled to provide power to the thermal management system, so that the thermal management system switches from a shutdown state to a working state, which is beneficial to improving the success rate of controlling the thermal management system.

[0146] See also Figure 7 , which shows a thermal runaway control device 700 provided by an embodiment of the present application. In a specific embodiment, the thermal runaway control device 700 can be applied to Figure 1 The main control device 300 in the battery system shown in FIG. Figure 7 The thermal runaway control device 700 shown in the figure is described in detail. The thermal runaway control device 700 may include an acquisition module 710 , a first control module 720 , a second control module 730 and a third control module 740 .

[0147] The acquisition module 710 can be used to obtain a pre-start request of the thermal management system of the battery system. The pre-start request can be used to indicate that the energy storage battery of the battery system has met the thermal runaway warning condition and has not met the thermal runaway alarm condition. The thermal runaway warning condition can be that at least one of the multiple sampling parameters of the battery system is an abnormal parameter, and the thermal runaway alarm condition can be that each of the multiple sampling parameters is an abnormal parameter; the first control module 720 can be used to respond to the pre-start request and control the thermal management system to perform cyclic cooling on the energy storage battery with a first cooling power; the second control module 730 can be used to control the thermal management system to stop cyclic cooling on the energy storage battery when the energy storage battery does not meet the thermal runaway alarm condition and the sampling temperature in the multiple sampling parameters is less than or equal to the temperature threshold; the third control module 740 can be used to control the thermal management system to perform cyclic cooling on the energy storage battery with a second cooling power when it is determined within a preset time that the energy storage battery has met the thermal runaway alarm condition, and the first cooling power can be less than the second cooling power.

[0148] In some embodiments, the thermal runaway control device 700 may further include a fourth control module.

[0149] The fourth control module can be used to control the thermal management system to stop cyclic cooling of the energy storage battery when it is determined that the energy storage battery does not meet the thermal runaway alarm condition within a preset time period.

[0150] In some embodiments, the battery system may be an energy storage vehicle, and the thermal runaway control device 700 may further include a determination module and a fifth control module.

[0151] The determination module can be used to control the thermal management system to circulate cooling of the energy storage battery with a second cooling power after the second control module 730 determines that the energy storage battery has met the thermal runaway alarm condition within a preset time period, and then determine the vehicle state of the electric vehicle; the fifth control module can be used to control the braking system of the electric vehicle to brake the electric vehicle when it is determined that the vehicle state is a driving state.

[0152] In some embodiments, the thermal runaway control device 700 may further include a sixth control module.

[0153] The sixth control module can be used to control the low-voltage power supply or high-voltage power supply of the battery system or the engine to power the thermal management system before the first control module 720 responds to a pre-start request to circulate cooling of the energy storage battery with a first cooling power, so as to switch the thermal management system from a shutdown state to a working state.

[0154] In some implementations, the acquisition module 710 may include an acquisition unit and a generation unit.

[0155] The acquisition unit can be used to acquire multiple sampling parameters collected by the battery management system; the generation unit can be used to generate a pre-start request when the multiple sampling parameters have met the thermal runaway warning conditions but have not met the thermal runaway alarm conditions.

[0156] In some implementations, the acquisition module 710 may further include a receiving unit.

[0157] The receiving unit can be used to receive a pre-start request reported by a battery management system. The pre-start request can be generated based on the battery management system determining that the collected multiple sampling parameters have met the thermal runaway warning conditions but have not met the thermal runaway alarm conditions.

[0158] In some embodiments, the thermal runaway control device 700 may further include a generation module.

[0159] The generation module can be used to generate and send an alarm message to a preset client when it is determined that the energy storage battery has met the thermal runaway alarm conditions.

[0160] The solution provided in this embodiment obtains a pre-start request of a thermal management system of a battery system, the pre-start request is used to indicate that an energy storage battery of the battery system has met a thermal runaway warning condition, but has not met a thermal runaway alarm condition, the thermal runaway warning condition is that at least one of a plurality of sampling parameters of the battery system is an abnormal parameter, and the thermal runaway alarm condition is that each of a plurality of sampling parameters is an abnormal parameter, and in response to the pre-start request, controls the thermal management system to perform cyclic cooling on the energy storage battery at a first cooling power, and controls the thermal management system to stop cyclic cooling on the energy storage battery when the energy storage battery has not met the thermal runaway alarm condition and a sampling temperature in a plurality of sampling parameters is less than or equal to a temperature threshold, and controls the thermal management system to perform cyclic cooling on the energy storage battery when it is determined within a preset time that the energy storage battery has met the thermal runaway alarm condition, controls the thermal management system to perform cyclic cooling on the energy storage battery at a second cooling power, the first cooling power being less than the second cooling power, so that when the energy storage battery has thermal runaway, the thermal management system is controlled to perform cyclic cooling on the energy storage battery at a larger cooling power, so that the battery temperature of the energy storage battery can be quickly reduced, which is beneficial to reducing the safety risk of the energy storage battery.

[0161] When the energy storage battery has not experienced thermal runaway and the sampling parameters are abnormal, controlling the thermal management system to circulate cooling of the energy storage battery with a smaller cooling power can suppress the problem of the energy storage battery being seriously damaged due to temperature increase before the energy storage battery is identified as thermal runaway, which is conducive to further reducing the safety risks of the energy storage battery.

[0162] When the energy storage battery does not experience thermal runaway and the sampling temperature is less than or equal to the temperature threshold, the thermal management system is controlled to stop working, which reduces the power consumption of the battery system and is conducive to improving the energy efficiency utilization of the battery system.

[0163] It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the embodiments can be referred to each other. For the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. Any processing method described in the method embodiment can be implemented by the corresponding processing module in the device embodiment, and will not be repeated one by one in the device embodiment.

[0164] In addition, each functional module in each embodiment of the present application can be integrated into a processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The above integrated modules can be implemented in the form of hardware or software functional modules.

[0165] See also Figure 8 , which shows a functional block diagram of a battery system 800 provided in an embodiment of the present application, the battery system 800 may include one or more of the following components: a memory 810, a processor 820, and one or more applications, wherein the one or more applications may be stored in the memory 810 and configured to be executed by the one or more processors 820, and the one or more applications are configured to execute the method described in the aforementioned method embodiment.

[0166] The memory 810 may include a random access memory (RAM) or a read-only memory (ROM). The memory 810 may be used to store instructions, programs, codes, code sets or instruction sets. The memory 810 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for implementing at least one function (such as obtaining a pre-opening request, responding to a pre-opening request, controlling cooling with a first cooling power, controlling cooling with a second cooling power, controlling cooling stop, determining a vehicle state, controlling braking, controlling power supply, obtaining multiple sampling parameters, collecting multiple sampling parameters, generating a pre-opening request, receiving a pre-opening request, reporting a pre-opening request, generating warning information, and sending warning information, etc.), instructions for implementing the following various method embodiments, etc. The storage data area can also store data created by the battery system 800 during use (such as battery system, thermal management system, pre-start request, energy storage battery, thermal runaway warning conditions, thermal runaway alarm conditions, multiple sampling parameters, abnormal parameters, first cooling power, preset duration, second cooling power, target sampling parameters, target parameter threshold, electric vehicle, vehicle status, driving status, braking system, low voltage power supply, high voltage power supply, engine, battery management system, alarm information and preset client), etc.

[0167] The processor 820 may include one or more processing cores. The processor 820 uses various interfaces and lines to connect various parts of the entire battery system 800, and executes various functions and processes data of the battery system 800 by running or executing instructions, programs, code sets or instruction sets stored in the memory 810, and calling data stored in the memory 810. Optionally, the processor 820 can be implemented in at least one hardware form of digital signal processing (DSP), field-programmable gate array (FPGA), and programmable logic array (PLA). The processor 820 can integrate one or a combination of a central processing unit (CPU), a graphics processing unit (GPU), and a modem. Among them, the CPU mainly processes the operating system, user interface, and application programs; the GPU is responsible for rendering and drawing display content; and the modem is used to process wireless communications. It is understandable that the above-mentioned modem may not be integrated into the processor 820, but may be implemented separately through a communication chip.

[0168] Please refer to Fig. 9 , which shows a structural block diagram of a computer-readable storage medium provided in an embodiment of the present application. The computer-readable storage medium 900 stores a program code 910, which can be called by a processor to execute the method described in the above method embodiment.

[0169] The computer-readable storage medium 900 may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read-only memory), an EPROM, a hard disk, or a ROM. Optionally, the computer-readable storage medium 900 includes a non-transitory computer-readable storage medium. The computer-readable storage medium 900 has storage space for program code 910 for executing any method steps in the above method. These program codes can be read from or written to one or more computer program products. The program code 910 can be compressed, for example, in an appropriate form.

[0170] Please refer to Fig.10 , which shows a structural block diagram of a computer program product 1000 provided in an embodiment of the present application. The computer program product 1000 includes a computer program / instruction 1010, and the computer program / instruction 1010 is stored in a computer-readable storage medium of a computer device. When the computer program product 1000 is run on a computer device, a processor of the computer device reads the computer program / instruction 1010 from the computer-readable storage medium, and the processor executes the computer program / instruction 1010, so that the computer device performs the method described in the above method embodiment.

[0171] The solution provided in this embodiment obtains a pre-start request of a thermal management system of a battery system, the pre-start request is used to indicate that an energy storage battery of the battery system has met a thermal runaway warning condition, but has not met a thermal runaway alarm condition, the thermal runaway warning condition is that at least one of a plurality of sampling parameters of the battery system is an abnormal parameter, and the thermal runaway alarm condition is that each of a plurality of sampling parameters is an abnormal parameter, and in response to the pre-start request, controls the thermal management system to perform cyclic cooling on the energy storage battery at a first cooling power, and controls the thermal management system to stop cyclic cooling on the energy storage battery when the energy storage battery has not met the thermal runaway alarm condition and a sampling temperature in a plurality of sampling parameters is less than or equal to a temperature threshold, and controls the thermal management system to perform cyclic cooling on the energy storage battery when it is determined within a preset time that the energy storage battery has met the thermal runaway alarm condition, controls the thermal management system to perform cyclic cooling on the energy storage battery at a second cooling power, the first cooling power being less than the second cooling power, so that when the energy storage battery has thermal runaway, the thermal management system is controlled to perform cyclic cooling on the energy storage battery at a larger cooling power, so that the battery temperature of the energy storage battery can be quickly reduced, which is beneficial to reducing the safety risk of the energy storage battery.

[0172] When the energy storage battery has not experienced thermal runaway and the sampling parameters are abnormal, controlling the thermal management system to circulate cooling of the energy storage battery with a smaller cooling power can suppress the problem of the energy storage battery being seriously damaged due to temperature increase before the energy storage battery is identified as thermal runaway, which is conducive to further reducing the safety risks of the energy storage battery.

[0173] When the energy storage battery does not experience thermal runaway and the sampling temperature is less than or equal to the temperature threshold, the thermal management system is controlled to stop working, which reduces the power consumption of the battery system and is conducive to improving the energy efficiency utilization of the battery system.

[0174] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. 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 cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A thermal runaway control method, characterized in that: include: Obtaining a pre-start request of a thermal management system of a battery system, wherein the pre-start request is used to indicate that an energy storage battery of the battery system has met a thermal runaway warning condition, but has not met a thermal runaway alarm condition, wherein the thermal runaway warning condition is that at least one of a plurality of sampled parameters of the battery system is an abnormal parameter, and the thermal runaway alarm condition is that each of the plurality of sampled parameters is the abnormal parameter; In response to the pre-start request, controlling the thermal management system to cyclically cool the energy storage battery at a first cooling power; When the energy storage battery does not meet the thermal runaway alarm condition and the sampling temperature in the multiple sampling parameters is less than or equal to the temperature threshold, controlling the thermal management system to stop cyclic cooling of the energy storage battery; When it is determined within a preset time period that the energy storage battery has satisfied the thermal runaway alarm condition, the thermal management system is controlled to perform cyclic cooling on the energy storage battery at a second cooling power, and the first cooling power is less than the second cooling power.

2. The thermal runaway control method according to claim 1, characterized in that: Also includes: When it is determined that the energy storage battery does not meet the thermal runaway alarm condition within the preset time period, the thermal management system is controlled to stop cyclic cooling of the energy storage battery.

3. The thermal runaway control method according to claim 1, characterized in that: The battery system is an electric vehicle. When it is determined within a preset time that the energy storage battery has met the thermal runaway alarm condition, after controlling the thermal management system to cyclically cool the energy storage battery at a second cooling power, the thermal runaway control method further includes: determining a vehicle state of the electric vehicle; When it is determined that the vehicle state is a driving state, a braking system of the electric vehicle is controlled to brake the electric vehicle.

4. The thermal runaway control method according to any one of claims 1 to 3, characterized in that: Before the thermal management system is controlled to cyclically cool the energy storage battery at a first cooling power in response to the pre-start request, the thermal runaway control method further includes: The low-voltage power supply or the high-voltage power supply or the engine of the battery system is controlled to supply power to the thermal management system, so that the thermal management system is switched from a shutdown state to a working state.

5. The thermal runaway control method according to any one of claims 1 to 3, characterized in that: The obtaining of a pre-start request of a thermal management system of a battery system includes: Acquire the multiple sampling parameters collected by the battery management system; When the plurality of sampling parameters satisfy the thermal runaway warning condition but do not satisfy the thermal runaway alarm condition, the pre-start request is generated.

6. The thermal runaway control method according to any one of claims 1 to 3, characterized in that: The obtaining of a pre-start request of a thermal management system of a battery system includes: The pre-start request reported by the battery management system is received, where the pre-start request is generated based on the battery management system determining that the multiple sampled parameters collected have satisfied the thermal runaway warning condition but have not satisfied the thermal runaway alarm condition.

7. The thermal runaway control method according to any one of claims 1 to 3, characterized in that: Also includes: When it is determined that the energy storage battery has met the thermal runaway alarm condition, an alarm message is generated and sent to a preset client.

8. A thermal runaway control device, characterized in that: include: an acquisition module, used for acquiring a pre-start request of a thermal management system of a battery system, wherein the pre-start request is used for indicating that an energy storage battery of the battery system has satisfied a thermal runaway warning condition, but has not satisfied a thermal runaway alarm condition, wherein the thermal runaway warning condition is that at least one of a plurality of sampling parameters of the battery system is an abnormal parameter, and the thermal runaway alarm condition is that each of the plurality of sampling parameters is the abnormal parameter; A first control module, configured to control the thermal management system to cyclically cool the energy storage battery at a first cooling power in response to the pre-start request; A second control module is used to control the thermal management system to stop cyclic cooling of the energy storage battery when the energy storage battery does not meet the thermal runaway alarm condition and the sampling temperature in the multiple sampling parameters is less than or equal to the temperature threshold; The third control module is used to control the thermal management system to cyclically cool the energy storage battery with a second cooling power when it is determined that the energy storage battery has met the thermal runaway alarm condition within a preset time period, and the first cooling power is less than the second cooling power.

9. A battery system, characterized in that: include: Memory; One or more processors coupled to the memory; One or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the one or more processors, and the one or more applications are configured to execute the thermal runaway control method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores program codes, which can be called by a processor to execute the thermal runaway control method according to any one of claims 1 to 7.

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