Thermal runaway early warning method, device and equipment based on cell pressure and medium

Abstract

The invention discloses a thermal runaway early warning method, device and equipment based on battery cell pressure and a medium. The thermal runaway early warning method comprises the steps that pressure values obtained by pressure sensors installed between battery cells are continuously obtained; obtaining a pressure peak value and a pressure valley value of each charge-discharge cycle of the battery cell according to the pressure value; setting a safety threshold value on the basis of calculation of the pressure peak value and the pressure valley value of the current charge-discharge cycle to generate a pressure early warning value; dynamically updating the pressure early warning value of the next charging cycle by using the pressure early warning value of the current charging and discharging cycle; and when the pressure value of the current charge-discharge cycle is greater than the pressure early warning value of the previous charge-discharge cycle, triggering thermal runaway early warning. According to the main technical scheme and effects, compared with traditional temperature or gas monitoring, potential thermal runaway risks are captured earlier, early warning is triggered in advance, and the possibility of major safety accidents is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of thermal runaway early warning, in particular to a thermal runaway early warning method and device based on cell pressure, equipment and medium. BACKGROUND

[0002] With the acceleration of the transformation of global energy structure towards clean and low-carbon, energy storage technology has gradually become a key link in energy management. The energy storage system with lithium iron phosphate lithium ion battery as the core, with its high energy density, fast response, high efficiency of charging and discharging, and strong integration, has become a widely used energy storage solution in the current market. The energy storage system is usually composed of a large number of lithium ion batteries connected in series and parallel. During operation, the batteries may generate a large amount of heat. If the thermal runaway phenomenon cannot be effectively controlled and prevented in time, it may lead to battery overheating, burning, and even cause fire accidents and other serious safety accidents. Therefore, how to realize early thermal runaway warning in the operation of the battery system has become one of the key technologies to ensure the safety of the energy storage system, improve the performance of the system, prolong the service life of the equipment, and reduce the operation and maintenance and equipment replacement costs.

[0003] At present, the common monitoring means in the energy storage system mainly rely on voltage, current, temperature and gas parameters for safety monitoring. Although these traditional parameters can ensure the basic working reliability of the battery to a certain extent, they have obvious hysteresis in the early stage of thermal runaway and cannot reflect the potential risks inside the battery in real time. These existing monitoring technologies have the following defects:

[0004] The current battery safety monitoring technology, especially the monitoring method based on temperature, gas and other parameters, can only effectively detect related abnormalities in the middle and later stages of battery thermal runaway. For example, the initial stage of battery thermal runaway is usually the occurrence of irreversible side reactions inside the battery, which causes changes in battery structure and temperature rise, and then leads to shell expansion and gas release, and finally results in rapid temperature rise and catastrophic events such as fire. However, traditional temperature monitoring can only work when the external temperature of the battery rises sharply, and cannot detect potential problems in the early stage.

[0005] The thermal runaway process of lithium ion batteries has obvious stage changes, from internal side reactions, swelling and deformation to gas release, and then to rapid temperature rise. These stages have obvious time difference. However, existing monitoring technologies mainly focus on battery voltage, current and temperature data, which can only reflect the late stage of thermal runaway, and lack monitoring means that can capture key abnormal signals in the early stage of thermal runaway. This makes it difficult for existing technologies to achieve real early warning and miss the best handling opportunity.

[0006] Temperature and gas monitoring technology usually needs to wait until the battery has a serious problem to detect the relevant changes, and these changes have often caused irreversible damage to the battery, even caused accidents. The small changes inside the battery, such as swelling, pressure fluctuation, etc., often occur earlier than temperature and gas changes. Therefore, the prior art has obvious technical bottlenecks in capturing early thermal runaway signals, and it is difficult to effectively avoid the occurrence of battery failure. SUMMARY

[0007] The purpose of the present application is to solve the technical problems in the prior art and provide a thermal runaway early warning method, device, equipment and medium based on the pressure of the battery cell.

[0008] The present application also relates to a thermal runaway early warning device based on the pressure of the battery cell, an electronic device, a computer readable storage medium and a computer program product to solve the technical defects in the prior art.

[0009] Technical scheme

[0010] In a first aspect, the present application provides a thermal runaway early warning method based on the pressure of the battery cell, comprising:

[0011] Continuously obtaining the pressure value obtained by the pressure sensor installed between the battery cells;

[0012] Obtaining the pressure peak value and the pressure valley value of each charge-discharge cycle of the battery cell through the pressure value;

[0013] Setting a safety threshold to generate a pressure early warning value based on the pressure peak value and the pressure valley value of the current charge-discharge cycle;

[0014] Dynamically updating the pressure early warning value of the current charge-discharge cycle to the pressure early warning value of the next charge cycle;

[0015] Triggering a thermal runaway early warning when the pressure value of the current charge-discharge cycle is greater than the pressure early warning value of the last charge-discharge cycle.

[0016] Preferably, setting a safety threshold to generate a pressure early warning value based on the pressure peak value and the pressure valley value of the current charge-discharge cycle, comprising:

[0017] Calculating the pressure change range of a single charge-discharge cycle;

[0018] Setting the pressure early warning value through the pressure change range.

[0019] Preferably, calculating the pressure change range of a single charge-discharge cycle, comprising:

[0020] ;

[0021] Wherein, a pressure variation range for a single charge-discharge cycle, a pressure peak value, a pressure valley value, a preset safety threshold value.

[0022] Preferably, the pressure early warning value is set by the pressure variation range, including:

[0023] ;

[0024] a pressure early warning value, a preset safety threshold value.

[0025] Preferably, the pressure value obtained by the pressure sensor installed between the battery cells is continuously acquired, including:

[0026] The pressure-sensitive membrane of the pressure sensor is arranged at the center position between adjacent battery cells.

[0027] Preferably, the thermal runaway early warning is triggered when the pressure value of the current charge-discharge cycle is greater than the pressure early warning value of the previous charge-discharge cycle, including:

[0028] When the pressure acquisition value is higher than the set early warning value, the preset early warning response strategy is sent to the BMS, and the BMS makes a response to protect and control the battery module, and informs the fire control system to suppress or extinguish the risk in the battery module.

[0029] Preferably, it further includes:

[0030] The voltage, current, temperature data, pressure value and pressure early warning value of the battery cell are displayed through a display unit.

[0031] In a second aspect, the embodiment of the present application provides a thermal runaway early warning device based on the pressure of a battery cell, characterized in that it comprises:

[0032] An acquisition unit is configured to continuously acquire the pressure value obtained by the pressure sensor installed between the battery cells;

[0033] A generation unit is configured to obtain the pressure peak value and the pressure valley value of each charge-discharge cycle of the battery cell through the pressure value; and set a safety threshold value to generate a pressure early warning value based on the pressure peak value and the pressure valley value of the current charge-discharge cycle;

[0034] An update unit is configured to dynamically update the pressure early warning value of the current charge-discharge cycle to the pressure early warning value of the next charge cycle;

[0035] A triggering unit is configured to trigger a thermal runaway early warning when the pressure value of the current charge-discharge cycle is greater than the pressure early warning value of the previous charge-discharge cycle.

[0036] In a third aspect, an electronic device is provided, including a processor and a memory. The memory is configured to store one or more computer programs. When the one or more computer programs stored in the memory are executed by the processor, the electronic device is enabled to implement the method of any possible design of the first aspect.

[0037] In a fourth aspect, a computer readable storage medium is provided, which stores a computer program. When the computer program is executed by a processor, the method of any one of the above embodiments is implemented.

[0038] In a fifth aspect, a computer program product is provided. When the computer program product is run on an electronic device, the electronic device is enabled to perform the method of any possible design of any one of the above aspects.

[0039] Advantages:

[0040] The present application utilizes high-precision pressure sensors to monitor the pressure changes of the battery during charging and discharging in real time. By calculating the pressure change range (ΔP) during each charging and discharging process and comparing it with the set safety threshold, it can send an early warning signal at the initial stage of abnormal expansion in the battery. This pressure-based monitoring method can capture potential thermal runaway risks earlier than traditional temperature or gas monitoring, triggering early warnings and effectively reducing the likelihood of major safety accidents.

[0041] In the present application, once the pressure change exceeds the preset threshold, the system will immediately take protective measures through linkage with the battery management system (BMS), such as disconnecting the battery connection, starting the cooling system or performing other safety controls, thereby avoiding further aggravation of the battery failure and preventing accidents such as fires caused by thermal runaway. This mechanism can minimize safety hazards and improve the overall safety of the battery system.

[0042] Through real-time monitoring and early warning of the internal pressure of the battery, the stability and safety of the energy storage system can be significantly improved. Taking timely measures at the initial stage of thermal runaway of the battery not only ensures the safe operation of the system, but also prolongs the service life of the equipment and avoids premature equipment failure or high cost of replacing the battery.

[0043] The present application forms a more reliable and intelligent monitoring system through data acquisition and real-time early warning mechanism of the pressure sensor. Combined with automatic early warning response and protection control, it can realize autonomous safety monitoring of the battery system, reduce manual intervention and improve the reliability of the system.

[0044] By early detection of the potential risk of thermal runaway, the present application can reduce the frequency of equipment failure, reduce battery replacement and maintenance costs, and prolong the service life of the battery module. In addition, timely warning and protection can also avoid losses caused by accidents and improve the economic benefits of the operation of the entire energy storage system.

[0045] The technical solution proposed by the present application is applicable to various battery systems, especially lithium batteries used in large-scale energy storage systems and electric vehicles. It not only plays an important role in large systems such as energy storage power stations, but also provides reliable protection for battery safety in fields such as electric vehicles. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 A method framework diagram is provided for the present application;

[0047] Figure 2 An electric core and pressure sensor placement state diagram is provided for the present application;

[0048] Figure 3 A battery thermal runaway process voltage and temperature change diagram is provided for the present application;

[0049] Figure 4 A thermal runaway process pressure change diagram is provided for the present application;

[0050] Figure 5 A device structure block diagram is provided for an embodiment of the present application;

[0051] Figure 6 An electronic device structure block diagram is provided for an embodiment of the present application. DETAILED DESCRIPTION

[0052] In order to make the technical solution of the present application clearer, the following will further describe the present application in detail with specific embodiments combined with the accompanying drawings.

[0053] Embodiment 1

[0054] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution in the embodiments of the present application will be described clearly and completely below in combination with the drawings of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. Unless otherwise defined, the technical terms or scientific terms used herein should be understood as the usual meaning understood by those skilled in the art in the field to which the present application belongs. The "includes" and similar words used herein mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0055] To solve the problems in the prior art, such as Figures 1-4 As shown in the drawings, a thermal runaway early warning method based on cell pressure is proposed, comprising:

[0056] S101, continuously acquiring the pressure value obtained by the pressure sensor installed between the cells; comprising:

[0057] The pressure-sensitive membrane of the pressure sensor is arranged at the center position between adjacent cells. This step collects the internal pressure changes of the battery in real time through the pressure sensor installed between the battery monomers. This is the basis of the entire early warning system. The pressure sensor continuously monitors the pressure value of the battery during charging and discharging. Through accurate pressure data, the health status and potential abnormal changes of the battery can be tracked to prevent thermal runaway and other failures. The pressure-sensitive membrane of the pressure sensor is arranged at the center position between adjacent cells, which makes the pressure detection more accurate.

[0058] S102, obtaining the pressure peak value and the pressure valley value of each charging and discharging cycle of the cell through the pressure value. The pressure fluctuation of the battery in different charging and discharging cycles can reflect the changes inside the battery. The pressure peak value and the pressure valley value are important indicators for evaluating the state of the battery.

[0059] S103, setting a safety threshold to generate a pressure early warning value based on the pressure peak value and the pressure valley value of the current charging and discharging cycle. This threshold is a safe pressure interval within the normal working range of the battery. If it exceeds this threshold, it may indicate that the battery has an abnormality.

[0060] S104, dynamically updating the pressure early warning value of the current charging and discharging cycle to the pressure early warning value of the next charging cycle. According to the historical data of the battery, a pressure safety threshold is set by calculating the pressure peak value and the pressure valley value of the current charging and discharging cycle. This step ensures that the system can dynamically adjust the early warning value and continuously optimize the early warning threshold according to the actual situation of each charging and discharging. This means that the system will gradually learn and adjust the early warning threshold based on the use history of the battery to adapt to different working environments and loads.

[0061] S105, triggering a thermal runaway early warning when the pressure value of the current charging and discharging cycle is greater than the pressure early warning value of the last charging and discharging cycle. The system will immediately trigger a thermal runaway early warning and notify the battery management system (BMS) and other safety systems to respond.

[0062] In some specific embodiments, setting a safety threshold to generate a pressure early warning value based on the pressure peak value and the pressure valley value of the current charging and discharging cycle comprises:

[0063] The pressure change range of a single charging and discharging cycle is calculated.

[0064] The pressure early warning value is set by the pressure change range.

[0065] In some specific embodiments, the pressure variation range of a single charge-discharge cycle is calculated, including:

[0066] ;

[0067] wherein, is the pressure variation range of a single charge-discharge cycle, is the pressure peak value, is the pressure valley value, is a preset safety threshold.

[0068] In some specific embodiments, the pressure warning value is set by the pressure variation range, including:

[0069] ;

[0070] is the pressure warning value, is a preset safety threshold.

[0071] Specifically, according to the calculated pressure variation range ΔP, a pressure warning value can be set for the current cycle. The warning value is usually set according to the proportion of the pressure peak value and the variation range. For example, a safety threshold proportion a (such as 10%, 20%, etc.) can be set to provide a preset threshold for the warning value. By setting the warning value using the proportion of the pressure peak value and the pressure variation range, the different working conditions of the battery can be more flexibly reflected, and timely warning can be ensured when the battery pressure changes abnormally.

[0072] The preset safety threshold a (such as 10%) provides a benchmark, which can be adjusted according to the actual battery type and working environment. Proper threshold setting can reduce false alarms, while improving the reliability and response speed of the system.

[0073] Example:

[0074] The pressure peak value P H of the battery = 5000 kPa;

[0075] The pressure valley value P L of the battery = 3000 kPa;

[0076] The set safety threshold proportion a = 10% = 0.1;

[0077] The pressure variation range:

[0078] ΔP = P H − P L = 5000 kPa − 3000 kPa = 2000 kPa;

[0079] Pressure warning value (P1):

[0080] P1 = P H + ΔP × a = 5000 kPa + 2000 kPa × 0.1 = 5000 kPa + 200 kPa = 5200 kPa;

[0081] Therefore, when the current charge-discharge cycle real-time pressure value of the battery is greater than the pressure warning value set in the previous charge-discharge cycle, for example, the pressure of the battery exceeds 5200 kPa, the system will trigger a thermal runaway warning.

[0082] In some specific embodiments, the thermal runaway warning is triggered when the pressure value of the current charge-discharge cycle is greater than the pressure warning value of the previous charge-discharge cycle, including:

[0083] When the pressure collection value is higher than the set warning value, the preset warning response strategy is sent to the BMS, and the BMS reacts to protect and control the battery module, and informs the fire control system to suppress or extinguish the risk in the battery module.

[0084] Specifically, once the pressure value exceeds the warning threshold, the system will automatically send the preset warning response strategy to the battery management system (BMS). These warning response strategies include in some instances:

[0085] Disconnecting the battery connection: cutting off the connection between the battery module and the circuit to prevent further current conduction and exacerbate the pressure change of the battery;

[0086] Limiting charging or discharging: controlling the charging and discharging rate of the battery to reduce the risk of thermal runaway;

[0087] Starting the cooling system: reducing the battery temperature by starting the cooling device to slow down the thermal runaway process;

[0088] After the battery management system (BMS) receives the warning signal, it will react according to the preset strategy, such as:

[0089] Starting internal protection mechanisms, such as reducing battery workload to reduce the possibility of temperature and pressure rising.

[0090] If the BMS considers that the battery risk is large, it will immediately disconnect the power supply of the battery to avoid the battery continuing to run.

[0091] In extreme cases, if the BMS detects that the risk cannot be solved by internal control measures, or the battery temperature and pressure reach a dangerous level, the system will automatically send an alarm to the fire control system, instructing it to take fire extinguishing or suppression measures. These measures may include:

[0092] Initiate the fire extinguishing system, intervene with automatic fire extinguishing equipment (such as gas or foam fire extinguishing).

[0093] Timely triggering of thermal runaway warning can provide sufficient reaction time for the system to prevent accidents, reduce human intervention and improve reaction speed and safety through automatic response of BMS and fire extinguishing system. By cutting off the battery power supply and starting the fire extinguishing system, battery module damage and fire spread can be avoided, and losses can be minimized.

[0094] In some specific embodiments, further comprising:

[0095] Obtaining voltage, current, temperature data, pressure value, pressure warning value of the battery cell, and displaying the data through the display unit.

[0096] In some specific embodiments, in specific instances, in combination with Figure 3 :

[0097] Early stage (0-8 minutes) During this period, the temperature of the battery changes very slowly, almost maintaining a stable low temperature state, and the battery voltage also maintains a relatively stable level. At this time, the battery is working normally and there is no sign of thermal runaway.

[0098] Temperature close to 60°C (about 8-12 minutes) As time goes on, the temperature of the battery begins to rise significantly, and a relatively flat rising phase appears in the graph, with the temperature close to 60°C. This indicates that the battery may have a slight internal reaction at this stage, causing the temperature to gradually rise.

[0099] Temperature rises sharply (after 12 minutes) After 12 minutes in the graph, the temperature of the battery rises sharply, marking the beginning of thermal runaway. At this time, the voltage of the battery also begins to rise significantly, indicating that there is a violent chemical reaction or structural change inside the battery, and the safety of the battery rapidly decreases.

[0100] Voltage rises rapidly; During the thermal runaway phase, the voltage of the battery rises rapidly from 15V to nearly 50V, indicating that there is a serious electrical problem in the internal battery cells of the battery, which is usually a serious sign of battery failure and may lead to equipment damage or even fires and other accidents.

[0101] This chart clearly shows the changes in temperature and voltage of the battery during thermal runaway. The rapid rise in temperature and voltage of the battery indicates the key characteristics of thermal runaway when it occurs, and this stage is usually a high-risk period for failure. Without timely monitoring and warning systems, the best intervention opportunity may be missed, leading to more serious safety accidents. Therefore, the use of early warning systems based on pressure changes is crucial for capturing early signals of thermal runaway, and can provide warnings before temperature and voltage change dramatically.

[0102] In some specific embodiments, at a specific instance, in combination with Figure 4 :

[0103] The pressure change of the battery during thermal runaway is shown. In the figure:

[0104] In the initial stage (0-6 minutes), the internal pressure of the battery changes smoothly in the first 6 minutes, and the pressure remains at about 2000kPa.

[0105] During this period, the battery has no significant abnormalities, showing normal working condition.

[0106] The pressure begins to rise (around 6 minutes), at about 6 minutes, the pressure begins to rise significantly, close to and exceed the 10% warning value (the threshold value represented by the dashed line in the figure).

[0107] This indicates that some minor abnormal changes may have occurred inside the battery, but it has not yet entered a critical state. This is the initial stage of the system triggering an early warning.

[0108] Significant changes in thermal runaway (after 12 minutes), from about 12 minutes, the pressure of the battery rises sharply, close to 10000kPa, significantly higher than the initial pressure value. This indicates that the battery has entered a thermal runaway state, and the battery may have expanded or reacted violently inside, causing the pressure to rise sharply. In this stage, the battery has a serious risk of thermal runaway failure, and emergency measures need to be taken immediately.

[0109] The "10% warning value" mentioned in the figure can be used as a key threshold for triggering an early warning, and the warning signal will be activated when the pressure approaches or exceeds this value. At this time, the system can trigger a protection mechanism to respond in time to avoid more serious thermal runaway phenomena.

[0110] By monitoring the pressure change in real time, the system can issue an early warning when the battery pressure approaches the safety threshold, intervening in advance to prevent further expansion of the battery failure. The pressure-based monitoring system can effectively capture the abnormal changes of the battery in the early stage of thermal runaway, which is more sensitive than traditional temperature monitoring technology, thereby improving the safety of the battery system.

[0111] In other embodiments of the present application, in combination with Figure 5 The embodiment of the present application discloses a thermal runaway early warning device based on the pressure of the battery cell, which comprises:

[0112] The acquisition unit 201 is used for continuously acquiring the pressure value acquired by the pressure sensor installed between the battery cells;

[0113] The generation unit 202 is used to obtain the pressure peak value and pressure valley value of the battery cell for each charge-discharge cycle based on the pressure value; and to set a safety threshold to generate a pressure warning value based on the pressure peak value and pressure valley value of the current charge-discharge cycle.

[0114] The updating unit 203 is used to dynamically update the pressure warning value of the current charge / discharge cycle to the pressure warning value of the next charging cycle.

[0115] Triggering unit 204 is used to trigger thermal runaway warning when the pressure value of the current charge-discharge cycle is greater than the pressure warning value of the previous charge-discharge cycle.

[0116] All relevant content of each step involved in the above method embodiments can be referenced from the functional description of the corresponding functional module, and will not be repeated here.

[0117] In other embodiments of the present invention, an electronic device 400 is disclosed, such as... Figure 6 As shown, the electronic device may include: one or more processors 401; a memory 402; a display 403; one or more application programs (not shown); and one or more computer programs 404. These devices can be connected via one or more communication buses 405. The one or more computer programs 404 are stored in the memory 402 and configured to be executed by the one or more processors 401. The one or more computer programs 404 include instructions that can be used to perform actions such as... Figures 1-2 And the steps in the corresponding embodiments.

[0118] Through the above description of the embodiments, those skilled in the art will clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0119] In the various embodiments of this invention, the functional units can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0120] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application or the entire or part of the technical solutions that make essential contributions to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the method described in the embodiments of the present application. The foregoing storage medium includes: a flash memory, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk, and various media that can store program codes.

[0121] The above is only a specific implementation of the embodiments of the present application, but the protection scope of the embodiments of the present application is not limited thereto. Any change or replacement within the technical scope disclosed by the embodiments of the present application should be covered within the protection scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application should be subject to the protection scope of the claims.

Claims

1. A thermal runaway early warning method based on cell pressure, characterized in that, The method comprises: continuously acquiring pressure values obtained by pressure sensors installed between the battery cells; obtaining pressure peak values and pressure valley values of each charge-discharge cycle of the battery cells through the pressure values; generating a pressure early warning value by setting a safety threshold based on the pressure peak value and the pressure valley value of the current charge-discharge cycle; dynamically updating the pressure early warning value of the current charge-discharge cycle to the pressure early warning value of the next charge cycle; triggering a thermal runaway early warning when the pressure value of the current charge-discharge cycle is greater than the pressure early warning value of the previous charge-discharge cycle.

2. The thermal runaway early warning method based on cell pressure according to claim 1, characterized in that, The method of generating a pressure early warning value by setting a safety threshold based on the pressure peak value and the pressure valley value of the current charge-discharge cycle comprises: calculating the pressure variation range of a single charge-discharge cycle; setting the pressure early warning value through the pressure variation range.

3. The thermal runaway early warning method based on cell pressure of claim 2, wherein, The method of calculating the pressure variation range of a single charge-discharge cycle comprises: ； wherein, is the pressure variation range for a single charge-discharge cycle, is the pressure peak value, is the pressure valley value, is a preset safety threshold value.

4. The thermal runaway early warning method based on cell pressure of claim 3, wherein, The method of setting the pressure early warning value through the pressure variation range comprises: ； wherein, is a pressure warning value, is a preset safety threshold.

5. The thermal runaway early warning method based on cell pressure of claim 3, wherein, The method of continuously acquiring pressure values obtained by pressure sensors installed between the battery cells comprises: The pressure-sensitive membrane of the pressure sensor is arranged at the center position between the adjacent battery cells.

6. The thermal runaway early warning method based on cell pressure of claim 1, wherein, The method of triggering a thermal runaway early warning when the pressure value of the current charge-discharge cycle is greater than the pressure early warning value of the previous charge-discharge cycle comprises: When the pressure collection value is higher than the set early warning value, a preset early warning response strategy is sent to the BMS, and the BMS reacts to protect and control the battery module, and informs the fire control system to suppress or extinguish the risk in the battery module.

7. The thermal runaway early warning method based on cell pressure of claim 1, wherein, The method further comprises: acquiring voltage, current, temperature data, pressure values, and pressure early warning values of the battery cells and displaying them through a display unit.

8. A thermal runaway early warning device based on cell pressure, characterized in that, The method comprises: an acquisition unit configured to continuously acquire pressure values obtained by pressure sensors installed between the battery cells; a generation unit configured to obtain pressure peak values and pressure valley values of each charge-discharge cycle of the battery cells through the pressure values; and generate a pressure early warning value by setting a safety threshold based on the pressure peak value and the pressure valley value of the current charge-discharge cycle; an update unit configured to dynamically update the pressure early warning value of the current charge-discharge cycle to the pressure early warning value of the next charge cycle; a triggering unit configured to trigger a thermal runaway early warning when the pressure value of the current charge-discharge cycle is greater than the pressure early warning value of the previous charge-discharge cycle.

9. An electronic device, comprising: The computer program is executed by the processor to implement the method of any one of claims 1 to 7.

10. A computer-readable storage medium having stored therein a computer program, characterized in that, The computer program is executed by the processor to implement the method of any one of claims 1 to 7.

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