Thermal runaway detection equipment

Abstract

The utility model discloses thermal runaway detection equipment. A heating structure of the thermal runaway detection equipment is attached to the surface of a battery module; the power supply module is electrically connected with the heating structure and provides an electric signal for the heating structure so as to heat the heating structure; the acquisition module is connected with the battery module and is used for acquiring temperature parameters of the battery module; the control module is electrically connected with the power supply module and the acquisition module, and is used for receiving the temperature parameters transmitted by the acquisition module and controlling the power supply module to start or stop working. On the basis, the thermal runaway detection equipment can monitor the thermal runaway triggering critical point under the condition that the battery module is full, and monitoring of the thermal runaway triggering critical point is more accurate; and meanwhile, the power supply module can be timely controlled to stop working when thermal runaway is triggered, so that the heating structure can be prevented from being excessively heated, and the test safety is improved.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a thermal runaway detection device. Background Art

[0002] In order to ensure the safety of a battery pack or a battery system, it is necessary to test the performance of battery cells or a battery pack under the condition of thermal diffusion caused by thermal runaway. Since the triggering moment occurs instantaneously during the thermal runaway test and the time is short, if the judgment is relatively lagging, it is easy to make an inaccurate judgment and the test safety is low. Utility Model Content

[0003] Based on this, in view of the above technical problems, it is necessary to provide a thermal runaway detection device that can accurately monitor the thermal runaway triggering moment and perform timely control, which can avoid the occurrence of thermal runaway and improve the test safety.

[0004] Based on the above purpose, this application provides a thermal runaway detection device applied to a battery module. The thermal runaway detection device includes:

[0005] A heating structure attached to the surface of the battery module, where the heating structure is used to increase the temperature under the action of an electrical signal;

[0006] A power supply module electrically connected to the heating structure and providing the electrical signal for the heating structure;

[0007] An acquisition module connected to the battery module, where the acquisition module is used to acquire the temperature parameter of the battery module; and

[0008] A control module electrically connected to the power supply module and the acquisition module respectively, where the control module is used to receive the temperature parameter and control the power supply module to start working or stop working according to the temperature parameter.

[0009] Optionally, the acquisition module includes:

[0010] A temperature sensor connected to the battery module and obtaining the temperature parameter of the battery module; and

[0011] A first signal processing unit connected to the temperature sensor and the control module respectively. The first signal processing unit is used to convert the temperature parameter into an electrical signal, an analog signal and a digital signal, and output the digital signal to the control module.

[0012] Optionally, the acquisition module is further used to acquire the voltage parameter of the battery module.

[0013] Optionally, the acquisition module further includes:

[0014] A voltage acquisition unit, connected to the battery module and acquiring voltage parameters of the battery module; and

[0015] A second signal processing unit, respectively connected to the voltage acquisition unit and the control module, the second signal processing unit being configured to convert the voltage parameters into digital signals and output the digital signals to the control module.

[0016] Optionally, the acquisition module is further configured to acquire pressure parameters of the battery module.

[0017] Optionally, the control module is configured to jointly control the power supply module to start working or stop working according to the temperature parameters, voltage parameters and pressure parameters acquired by the acquisition module.

[0018] Optionally, the acquisition module further includes:

[0019] A pressure sensor, connected to the battery module and acquiring pressure parameters of the battery module; and

[0020] A third signal processing unit, electrically connected to the pressure sensor and the control module respectively, the third signal processing unit being configured to convert the pressure parameters into analog signals and digital signals and output the digital signals to the control module.

[0021] Optionally, the heating structure is a heating sheet, a heating film, a heating wire or a heating rod.

[0022] Optionally, the control module includes:

[0023] A control unit, the control unit being electrically connected to the acquisition module, the control unit being configured to receive temperature parameters transmitted by the acquisition module; and

[0024] A PC host computer, electrically connected to the control unit and the power supply module respectively, the PC host computer being configured to control the power supply module to start working or stop working according to the temperature parameters transmitted by the control unit.

[0025] Optionally, the power supply module is a DC variable power supply module.

[0026] Based on the above description, for the thermal runaway detection device of the present application, the heating structure is attached to the surface of the battery module. The power supply module is electrically connected to the heating structure and can provide an electrical signal to cause the heating structure to heat up and transfer heat to the battery module. The acquisition module is connected to the battery module and can collect the temperature parameters on the surface of the battery module in real time. The control module is electrically connected to the power supply module and the acquisition module. The control module can control the state of the power supply module according to the parameter data collected by the acquisition module. Based on this, with the mutual cooperation of each module of the thermal runaway detection device of the present application, the control module can accurately monitor the temperature of the battery module and can monitor in real time whether it meets the thermal runaway trigger critical point, so that the monitoring of the thermal runaway trigger critical point is more accurate. At the same time, the control module can also timely control the power supply module to stop working when triggering thermal runaway, which can avoid overheating of the heating structure and improve the safety of the test. Moreover, the power supply module of the present application heats the heating structure without directly heating the battery module, nor generating heat by charging or discharging the battery module. This enables the thermal runaway trigger critical point determined by the control module of the present application to be the thermal runaway trigger critical point under the condition of full charge of the battery module. Compared with the solution of determining the thermal runaway critical adjustment according to the temperature parameters during battery charging or discharging, the thermal runaway trigger critical point monitored by the present application is more accurate. Description of the Drawings

[0027] Figure 1 FIG. 1 is a schematic diagram of the first structure of the thermal runaway detection device provided by an embodiment of the present application;

[0028] Figure 2 FIG. 2 is a schematic diagram of a structure of the acquisition module provided by an embodiment of the present application;

[0029] Figure 3 FIG. 3 is a schematic diagram of the second structure of the thermal runaway detection device provided by an embodiment of the present application;

[0030] Figure 4 FIG. 4 is a schematic diagram of a working process of the thermal runaway detection device provided by an embodiment of the present application.

[0031] The reference numerals in the embodiments of the present application are described as follows:

[0032] 10. Thermal runaway detection device; 100. Heating structure; 200. Power supply module; 300. Acquisition module; 400. Control module; 500. Battery module; 310. Temperature sensor; 320. First signal processing unit; 330. Voltage acquisition unit; 340. Second signal processing unit; 350. Pressure sensor; 360. Third signal processing unit; 410. Control unit; 420. PC host computer. Detailed Embodiments

[0033] The following will be combined with the attached drawings in the present application Figure 1 to Figure 4Examples are used to clearly and completely describe the technical solutions in this application. Obviously, the described examples are only a part of the examples in this application, rather than all the examples. Based on the examples in this application, all other examples obtained by those skilled in the art without creative efforts belong to the protection scope of this application.

[0034] The mention of "example" in this context means that the specific features, structures, or characteristics described in connection with the example can be included in at least one example of this application. The phrase may not necessarily refer to the same example when it appears in various positions in the specification, nor is it an independent or alternative example that is mutually exclusive with other examples. Those skilled in the art will explicitly and implicitly understand that the examples described herein can be combined with other examples.

[0035] The following is a detailed description in combination with specific examples. It should be noted that the examples of this application can be presented in various forms, and some examples will be described below.

[0036] Lithium batteries such as cylindrical batteries include components such as positive and negative electrodes, electrolyte, separator, and outer shell. Among them, the positive and negative electrodes are composed of electrode materials, binders, and conductive agents; the electrolyte is an electrolyte formed by dissolving one or more chemical substances in an organic solvent or water; the separator is to prevent direct contact between the positive and negative electrodes; the outer shell is to ensure the external safety of the battery and is usually made of metal or plastic materials. Before leaving the factory, lithium batteries need to be tested for thermal runaway state.

[0037] Based on this, this application provides a thermal runaway detection device 10. The thermal runaway detection device 10 collects the temperature parameters on the surface of the battery module 500 through the collection module 300, and the control module 400 controls the power module 200 to start or stop according to the collected temperature parameters. The device in this application can use the temperature control strategy to realize the start and stop of the heating device, which is convenient for accurate monitoring of the trigger moment and can achieve the purpose of quickly and accurately determining the heating process.

[0038] Specifically, please refer to Figure 1 , Figure 1 which is the first structural schematic diagram of the thermal runaway detection device 10 provided by the embodiment of this application. The thermal runaway detection device 10 is applied to the battery module 500. The thermal runaway detection device 10 includes a heating structure 100, a power module 200, a collection module 300, and a control module 400.

[0039] The heating structure 100 is attached to the surface of the battery module 500, and the heating structure 100 is used to increase the temperature under the action of an electrical signal. The power supply module 200 is electrically connected to the heating structure 100 and provides an electrical signal for the heating structure 100. The acquisition module 300 is connected to the battery module 500, and the acquisition module 300 is used to acquire the temperature parameters of the battery module 500; the control module 400 is electrically connected to the power supply module 200 and the acquisition module 300 respectively. The control module 400 is used to receive the temperature parameters transmitted by the acquisition module 300 and is used to control the state of the power supply module 200 according to the temperature parameters. For example, the control module 400 can control the power supply module 200 to start working or stop working.

[0040] It can be understood that the heating structure 100 can be attached to one surface, two surfaces or multiple surfaces of the battery module 500. Among them, the heating structure 100 is thermally conductively connected to the battery module 500. When the power supply module 200 provides an electrical signal for the heating structure 100, the heating structure 100 increases the temperature and generates heat under the action of the electrical signal and conducts the heat to the battery module 500. The battery module 500 increases the temperature under the action of the heating module. The acquisition module 300 can acquire the temperature parameters of the battery module 500 so that the control module 400 can monitor whether the thermal runaway critical point is triggered. Among them, the battery module 500 can be a single-cell structure, and the battery module 500 can also be a battery pack, a battery module, etc. The specific structure of the battery module 500 is not limited in this application.

[0041] It can be understood that the heating structure 100 can be, but is not limited to, structures such as heating sheets, heating films, heating wires, and heating rods. The acquisition module 300 can acquire the temperatures of the thermocouples arranged on the surfaces of the battery module 500 and the heating sheet / heating film / heating wire / heating rod and feedback them to the control module 400 in real time. The control module 400 then realizes the start and stop of the power supply module 200 through a control strategy according to the acquired temperature parameters.

[0042] It can be understood that as Figure 2 shown, Figure 2FIG. 0 is a schematic structural diagram of the acquisition module 300 provided by an embodiment of the present application. The acquisition module 300 may include a temperature sensor 310. The temperature sensor 310 is connected to the battery module 500 and obtains the temperature parameter of the battery module 500. The temperature sensor 310 can collect the temperature parameter of the monitoring point. The acquisition module 300 may arrange one or more (two or more) monitoring points on the battery module 500. The monitoring points may be evenly distributed on the surface of the battery module 500. For example, monitoring points are provided on different surfaces of the battery module 500. Of course, the monitoring points may also be distributed in special areas of the battery module 500, such as on the large surface of the battery module 500. The embodiment of the present application does not limit this. Among them, the acquisition module 300 may further include a first signal processing unit 320. The first signal processing unit 320 is respectively connected to the temperature sensor 310 and the control module 400. The first signal processing unit 320 is used to convert the temperature parameter into an electrical signal, an analog signal and a digital signal, and output the digital signal to the control module 400.

[0043] It can be understood that the power supply module 200 may be, but is not limited to, a DC variable power supply module. The power supply module 200 can input a DC signal to the heating structure 100 to heat the heating structure 100. Among them, the power supply module 200 can change its output power so that the power supply module 200 can heat the heating module with different output powers. Among them, the control module 400 can also control the power supply module 200 to adjust its transmission power to adjust the heating power of the heating structure 100.

[0044] It should be noted that the power supply module 200 in the embodiment of the present application may also be a power supply module 200 with a fixed power. The embodiment of the present application does not limit this.

[0045] It can be understood that the control module 400 can control the power supply module 200 to start working and can control the power supply module 200 to stop working under preset conditions. Among them, the preset conditions can be that the temperature rise rate of the monitoring point collected by the acquisition module 300 is greater than or equal to the preset temperature rise rate value and the temperature rise rate lasts for a preset duration. The control module 400 can control the power supply module 200 to stop working when the temperature parameter collected by the acquisition module 300 meets the preset conditions. Among them, the preset temperature rise rate value can be greater than or equal to 1 degree Celsius per second (°C / s). For example, the preset temperature rise rate value can be 1 °C / s, 2 °C / s, 3 °C / s, 4 °C / s, etc. The preset duration can be greater than or equal to 3 s. For example, the preset duration can be 3 seconds (s), 4 s, 5 s, 6 s, 8 s, etc. In some embodiments, the control module 400 can control the power supply module 200 to stop working when the temperature rise rate of the monitoring point collected by the acquisition module 300 is greater than or equal to 1 °C / s and the temperature rise rate lasts for 3 s. In other embodiments, the control module 400 can control the power supply module 200 to stop working when the temperature rise rate of the monitoring point collected by the acquisition module 300 is greater than or equal to 3 °C / s and the temperature rise rate lasts for 5 s.

[0046] It can be understood that the control module 400 can calculate the temperature rise rate of the battery module 500 through software. For example, the control module 400 can calculate according to the formula: (T n -T n-1 ) / 0.1 to calculate the temperature rise rate of the battery module 500. Among them, T n-1 and T n are the temperatures at 0.1 second and 0.1 second later respectively.

[0047] It can be understood that when the control module 400 determines the thermal runaway trigger critical point of the battery module 500, it can obtain the current state parameters of the battery module 500. The current state parameters can be detected by the thermal runaway detection device 10 of the present application (for example, collected by the acquisition module 300); the current state parameters can also be detected by other devices, and the present application does not limit this.

[0048] The thermal runaway detection device 10 according to the embodiment of the present application, the heating structure 100 is attached to the surface of the battery module 500, and the power supply module 200 is electrically connected to the heating structure 100 and can provide an electrical signal to cause the heating structure 100 to heat up and transfer heat to the battery module 500; the acquisition module 300 is connected to the battery module 500 and can collect the temperature parameters on the surface of the battery module 500 in real time; the control module 400 is electrically connected to the power supply module 200 and the acquisition module 300, and the control module 400 can control the power supply module 200 to start working or stop working according to the temperature parameters collected by the acquisition module 300. Based on this, with the cooperation of each module of the thermal runaway detection device 10 of the present application, the control module 400 can accurately monitor the temperature of the battery module 500 and can monitor in real time whether the thermal runaway condition is triggered, so that the monitoring of the thermal runaway trigger critical point is more accurate; at the same time, the control module 400 can also timely control the power supply module 200 to stop working when the thermal runaway critical point is triggered, which can avoid thermal diffusion caused by excessive heating of the heating structure 100. The detection safety of the thermal runaway detection device 10 of the present application is better. Moreover, the power supply module 200 of the present application heats the heating structure 100 without directly heating the battery module 500, nor causing the battery module 500 to charge or discharge to generate heat. The thermal runaway trigger critical point determined by the control module 400 of the present application is the thermal runaway trigger critical point under the condition that the battery module 500 is fully charged (the battery module 500 of the present application does not need to be charged or discharged, and the battery module 500 can be in a fully charged state). Compared with the solution of determining the thermal runaway critical adjustment according to the temperature parameters during battery charging or discharging, the thermal runaway trigger critical point monitored by the present application is more accurate.

[0049] Among them, in some embodiments, please combine Figure 2 and please refer to Figure 3 , Figure 3 which is the second structural schematic diagram of the thermal runaway detection device 10 provided by the embodiment of the present application. The acquisition module 300 is further configured to acquire the voltage parameters of the battery module 500.

[0050] The acquisition module 300 can acquire the voltage parameters of the battery module 500 at this time when the thermal runaway critical point is triggered, so as to obtain the voltage performance of the battery module 500 under the thermal runaway condition. Of course, the control module 400 can also determine the thermal runaway trigger critical point of the battery module 500 according to the temperature parameters and voltage parameters at the same time. The control module 400 can control the power supply module 200 to stop working under a preset condition, and the preset condition is that the temperature rise rate of the monitoring point collected by the acquisition module 300 is greater than or equal to a preset temperature rise rate value, and the temperature rise rate lasts for a preset duration, and the ratio of the voltage drop value of the monitoring point to the initial voltage exceeds a preset ratio. The control module 400 can control the power supply module 200 to stop working when the temperature parameters and voltage parameters collected by the acquisition module 300 meet the above preset conditions.

[0051] It can be understood that the preset temperature rise rate value can be greater than or equal to 1 °C / s. For example, the preset temperature rise rate value can be 1 °C / s, 2 °C / s, 3 °C / s, 4 °C / s, 6 °C / s, etc. The preset duration can be greater than or equal to 3 s. For example, the preset duration can be 3 s, 4 s, 5 s, 6 s, 8 s, etc. The preset ratio can be greater than or equal to 25%. For example, the preset ratio is 25%, 30%, 35%. In some embodiments, when the temperature rise rate of the monitoring point collected by the acquisition module 300 is greater than or equal to 1 °C / s, and the temperature rise rate lasts for 3 s, and the voltage drop value of the monitoring point is 25% of the initial voltage, the control module 400 can control the power supply module 200 to stop working. In other embodiments, when the temperature rise rate of the monitoring point collected by the acquisition module 300 is greater than or equal to 5 °C / s, and the temperature rise rate lasts for 5 s, and the voltage drop value of the monitoring point is 30% of the initial voltage, the control module 400 can control the power supply module 200 to stop working.

[0052] It can be understood that the acquisition module 300 may include a voltage acquisition unit 330 and a second signal processing unit 340. The voltage acquisition unit 330 is connected to the battery module 500 and acquires the voltage parameters of the battery module 500. The second signal processing unit 340 is respectively connected to the voltage acquisition unit 330 and the control module 400. The second signal processing unit 340 is used to convert the voltage parameters into digital signals and output the digital signals to the control module 400.

[0053] It can be understood that the acquisition module 300 may further include a flexible circuit board. The voltage signal acquisition end of the voltage acquisition unit 330 may be provided on the flexible circuit board, and the voltage signal acquisition end may be electrically connected to the battery module 500 to obtain the voltage parameters of the battery module 500.

[0054] The thermal runaway detection device 10 of the embodiment of the present application determines the trigger critical point of thermal runaway through three parameters: temperature rise rate, duration, and voltage drop, and the determined trigger critical point of thermal runaway is more accurate.

[0055] Among them, in some embodiments, the acquisition module 300 is further used to acquire the pressure parameters of the battery module 500.

[0056] The acquisition module 300 can acquire the pressure parameters of the battery module 500 at this time when triggering the thermal runaway trigger critical point, so as to obtain the pressure parameters of the battery module 500 under the thermal runaway condition. Of course, the control module 400 can also determine the thermal runaway trigger critical point of the battery module 500 according to the temperature parameters and pressure parameters at the same time; or, the control module 400 can also determine the thermal runaway trigger critical point of the battery module 500 according to the temperature parameters, voltage parameters and pressure parameters at the same time and control the state of the power supply module 200.

[0057] For example, the control module 400 can control the power supply module 200 to stop working under preset conditions. The preset conditions are that the temperature rise rate of the monitoring point collected by the acquisition module 300 is greater than or equal to 1 °C / s, and the temperature rise rate lasts for 3 s, and the voltage drop value of the monitoring point exceeds 25% of the initial voltage, and the pressure parameter of the monitoring point exceeds the preset voltage value. The control module 400 can control the power supply module 200 to stop working when the temperature parameter, voltage parameter, and pressure parameter collected by the acquisition module 300 meet the above preset conditions. It should be noted that the preset voltage value of the monitoring point will vary with the size of the battery. Therefore, the preset voltage value is not specifically described in the embodiments of the present application.

[0058] It can be understood that the acquisition module 300 can further include a pressure sensor 350 and a third signal processing unit 360. The pressure sensor 350 is connected to the battery module 500 and obtains the pressure parameter of the battery module 500. The pressure sensor 350 can collect the pressure parameter of the monitoring point. The third signal processing unit 360 is electrically connected to the pressure sensor 350 and the control module 400 respectively. The third signal processing unit 360 is used to convert the pressure parameter into an analog signal and a digital signal, and output the digital signal to the control module 400.

[0059] It can be understood that, as Figure 3 shown, the acquisition module 300 of the present application is a multi-functional acquisition module. The acquisition module 300 can include at least one temperature acquisition channel, at least one pressure acquisition channel, and at least one voltage acquisition channel. For example, the acquisition module 300 can include multiple (two or more) temperature acquisition channels, multiple pressure acquisition channels, and multiple voltage acquisition channels. Further, the acquisition module 300 can include 40 temperature acquisition channels, 2 pressure acquisition channels, and 2 voltage acquisition channels, so that the acquisition module 300 can simultaneously collect temperature parameters, voltage parameters, and pressure parameters. Among them, each temperature acquisition channel is electrically connected to the battery module 500 and the control module 400 respectively. Each temperature acquisition channel can include a temperature sensor 310, or can also include a temperature sensor 310 and a first signal processing unit 320. Each pressure acquisition channel is electrically connected to the battery module 500 and the control module 400 respectively. Each pressure acquisition channel can include a pressure sensor 350, or can also include a pressure sensor 350 and a third signal processing unit 360. Each voltage acquisition channel is electrically connected to the battery module 500 and the control module 400 respectively. Each voltage acquisition channel can include a voltage acquisition unit 330, or can also include a voltage acquisition unit 330 and a second signal processing unit 340. The acquisition module 300 in the embodiments of the present application can simultaneously collect temperature parameters, voltage parameters, and pressure parameters.

[0060] Among them, as Figure 3As shown, in some embodiments, the control module 400 includes a control unit 410 and a PC host computer 420. The control unit 410 is electrically connected to the acquisition module 300. The control unit 410 is configured to receive the temperature parameters transmitted by the acquisition module 300 and interact with the PC host computer 420. The PC host computer 420 is electrically connected to the control unit 410 and the power supply module 200 respectively. The PC host computer 420 is configured to control the power supply module 200 to start working or stop working according to the temperature parameters transmitted by the control unit 410.

[0061] It can be understood that the control unit 410 can be a relatively simple structure. The control unit 410 can receive temperature parameters, pressure parameters, voltage parameters, etc. collected by the acquisition module 300. The PC host computer 420 can implement various control functions through programming, such as logical control, motion control, data processing, etc. The PC host computer 420 can be, but is not limited to, a desktop computer, a laptop computer, etc. The PC host computer 420 can determine in real time whether it meets the thermal runaway trigger critical point according to the temperature parameters transmitted by the control unit 410, and can control the state of the power supply module 200.

[0062] For example, the control unit 410 can receive the temperature parameters collected by the temperature sensor 310 of the acquisition module 300, and can transmit the temperature parameters to the PC host computer 420. The PC host computer 420 can calculate data such as the temperature rise rate of the battery module 500 according to the temperature parameters in combination with corresponding software algorithms, and control the power supply module 200 to start working or stop working according to the calculated data.

[0063] It can be understood that the PC host computer 420 can also control the power supply module 200 to adjust its transmission power to adjust the heating power of the heating sheet.

[0064] The control module 400 of the embodiment of the present application includes a control unit 410 and a PC host computer 420. The two modules cooperate with each other to work, which can reduce the pressure of determining the thermal runaway trigger critical point of a single module and improve the efficiency of determining the thermal runaway trigger critical point.

[0065] Based on the above description of the thermal runaway detection device 10, please refer to Figure 4 , Figure 4 which is a schematic diagram of a working process of the thermal runaway detection device 10 provided by the embodiment of the present application. The thermal runaway detection device 10 of the present application includes the following steps:

[0066] S11. Set the heating power of the power supply module 200 and the thermal runaway trigger critical point according to the test requirements. The thermal runaway trigger critical point can be that the temperature rise rate is greater than or equal to 1 °C / s and the temperature rise rate lasts for 3 s. Of course, the thermal runaway trigger critical point can also be a condition formed by the temperature rise rate, the duration, the voltage condition, and the pressure condition. The present application does not limit this.

[0067] S12. Start the test to obtain the real-time temperature data collected by the acquisition module 300 at the monitoring points arranged on the battery module 500. During this process, the temperature data on one side can be collected at intervals of 0.1 second. Of course, in this step, it is also possible to obtain the voltage parameters and pressure parameters collected at the monitoring points.

[0068] S13. Feed the real-time collected temperature parameters (voltage parameters and pressure parameters) back to the PC host computer 420. The software calculates the temperature rise rate through the algorithm (T n -T n-1 ) / 0.1. Wherein, T n-1 , T n are the temperatures at 0.1 second and 0.1 second later respectively.

[0069] S14. Through the real-time monitoring of the above algorithm, determine whether the temperature rise rate is greater than the set control heating condition and the duration meets the set duration;

[0070] S15. If so, the control module 400 controls the power supply module 200 to stop heating and determines the test result;

[0071] S16. If not, continue with step S13, and feed the real-time collected temperature parameters (voltage parameters and pressure parameters) back to the PC host computer 420 again.

[0072] Based on this, with the mutual cooperation of each module of the thermal runaway detection device 10 of the present application, the control module 400 can accurately monitor the temperature of the battery module 500 and can monitor in real time whether the thermal runaway condition is triggered, so that the monitoring of the thermal runaway trigger critical point is more accurate; at the same time, the control module 400 can also timely control the power supply module 200 to stop working when the thermal runaway trigger critical point is triggered, which can avoid excessive heating of the heating structure 100 and cause heat dissipation. Moreover, the thermal runaway trigger critical point determined by the control module 400 of the present application is the thermal runaway trigger critical point under the condition that the battery module 500 is fully charged, and the thermal runaway trigger critical point is more accurate. At the same time, the present application can also determine the thermal runaway trigger critical point according to the temperature rise rate, duration, voltage parameters, and pressure parameters at the same time, which can further improve the accuracy of the thermal runaway trigger critical point.

[0073] It should be understood that in the description of the present application, terms such as "first" and "second" are only used to distinguish similar objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0074] It is understandable that those skilled in the art can, under the guidance of the above embodiments, combine various implementation manners in the above embodiments to obtain technical solutions of various implementation manners. The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

[0075] The above has introduced in detail the thermal runaway detection device provided by the present application. Specific examples are used herein to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only for helping to understand the present application. At the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A thermal runaway detection device, characterized in that: Applied to a battery module, the thermal runaway detection device comprises: A heating structure, attached to the surface of the battery module, the heating structure is used to increase the temperature under the action of an electrical signal; A power module, electrically connected to the heating structure and providing the electrical signal to the heating structure; a collection module connected to the battery module, the collection module being used to collect temperature parameters of the battery module; and The control module is electrically connected to the power module and the acquisition module respectively, and is used to receive the temperature parameter and control the power module to start or stop working according to the temperature parameter.

2. The thermal runaway detection device according to claim 1, characterized in that: The acquisition module comprises: a temperature sensor connected to the battery module and acquiring a temperature parameter of the battery module; and The first signal processing unit is respectively connected to the temperature sensor and the control module, and is used for converting the temperature parameter into an electrical signal, an analog signal and a digital signal, and outputting the digital signal to the control module.

3. The thermal runaway detection device according to claim 1, characterized in that: The acquisition module is also used to acquire voltage parameters of the battery module.

4. The thermal runaway detection device according to claim 3, characterized in that: The acquisition module also includes: a voltage acquisition unit, connected to the battery module and acquiring voltage parameters of the battery module; and The second signal processing unit is connected to the voltage acquisition unit and the control module respectively, and is used for converting the voltage parameter into a digital signal and outputting the digital signal to the control module.

5. The thermal runaway detection device according to claim 3, characterized in that: The acquisition module is also used to acquire pressure parameters of the battery module.

6. The thermal runaway detection device according to claim 5, characterized in that: The control module is used to control the power supply module to start or stop working according to the temperature parameters, voltage parameters and pressure parameters collected by the collection module.

7. The thermal runaway detection device according to claim 5, characterized in that: The acquisition module also includes: a pressure sensor connected to the battery module and acquiring pressure parameters of the battery module; and The third signal processing unit is electrically connected to the pressure sensor and the control module respectively, and is used for converting the pressure parameter into an analog signal and a digital signal, and outputting the digital signal to the control module.

8. The thermal runaway detection device according to any one of claims 1 to 7, characterized in that: The heating structure is a heating sheet, a heating film, a heating wire or a heating rod.

9. The thermal runaway detection device according to any one of claims 1 to 7, characterized in that: The control module comprises: A control unit, the control unit is electrically connected to the acquisition module, and the control unit is used to receive the temperature parameter transmitted by the acquisition module; and The PC host computer is electrically connected to the control unit and the power module respectively, and the PC host computer is used to control the power module to start or stop working according to the temperature parameter transmitted by the control unit.

10. The thermal runaway detection device according to any one of claims 1 to 7, characterized in that: The power supply module is a DC variable power supply module.

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