Test system

Abstract

The utility model discloses a testing system which comprises a supporting assembly, a displacement measuring assembly and a pressure measuring assembly, and a base is used for supporting a battery module. The displacement measurement assembly comprises a supporting column and a displacement measurer, one end of the supporting column is fixedly connected with the base, the other end of the supporting column is connected with the displacement measurer, and the displacement measurer is used for measuring the displacement of the battery module in the overcharge state. The pressure measuring assembly comprises a pressure testing part and a data transmission part which are connected with each other, the pressure testing part is arranged between single batteries in the battery module to collect pressure data, and the data transmission part is exposed outside to be used for data transmission. The utility model aims to solve the technical problem of how to comprehensively detect the expansion force in the battery module and the distribution of the expansion force.

Description

Technical Field

[0001] The utility model relates to the technical field of battery module detection, in particular to a testing system. Background Art

[0002] Lithium-ion batteries are widely used in consumer electronics, new energy vehicles, and energy storage systems, favored for their high energy density and long cycle life. However, overcharging can cause internal battery temperatures to rise, leading to electrolyte decomposition and gas production, which can lead to safety hazards such as battery swelling, diaphragm rupture, short circuits, and fire. To ensure the safety of lithium-ion batteries, especially under overcharge conditions, testing and research of battery modules is crucial.

[0003] Existing testing equipment primarily focuses on measuring the expansion force of battery module end plates or large cell surfaces, making it difficult to determine the pressure distribution between individual cells within the module. This limitation severely restricts in-depth research on the mechanical behavior and safety of battery modules under overcharge. Therefore, comprehensive testing of the expansion force and its distribution within the battery module has become a pressing technical challenge. Utility Model Content

[0004] One purpose of the present invention is to provide a testing system, which aims to solve the technical problem of how to comprehensively detect the expansion force and its distribution in a battery module.

[0005] To achieve the above-mentioned purpose, the present invention provides a solution: a testing system, which includes a support assembly, including a base, which is used to support a battery module; a displacement measuring assembly, including a support column and a displacement meter, one end of the support column is fixedly connected to the base, and the other end of the support column is connected to the displacement meter, which is used to measure the displacement of the battery module in an overcharge state; a pressure measuring assembly, including a pressure testing part and a data transmission part that are interconnected, the pressure testing part is arranged between the single cells in the battery module to collect pressure data, and the data transmission part is exposed to the outside for data transmission.

[0006] Optionally, the pressure testing portion is used to cover the side surface of the single battery, and the area of the pressure testing portion is larger than the area of the side surface of the single battery.

[0007] Optionally, the displacement meter includes an abutment column, a mounting seat, a guide rail and a support seat, the support seat and the base are connected, the guide rail is set on the support seat, the mounting seat is slidably connected to the guide rail, the abutment column is passed through the mounting seat, the abutment column is used to abut with the battery module, and the abutment column is used to drive the mounting seat to slide.

[0008] Optionally, the displacement meter further includes a fastener, the mounting seat is provided with a mounting hole, the support seat is provided with a clearance groove along the length direction of the abutment column, and the fastener passes through the mounting hole and the clearance groove in sequence.

[0009] Optionally, the displacement meter further includes a slider, the support seat is provided with a slide groove along the length direction of the abutment column, the yield groove is connected to the slide groove, the slider is slidably connected to the slide groove, and the fastener is fixedly connected to the slider.

[0010] Optionally, an opening is provided on a side of the support seat away from the fastener, the opening is communicated with the slide groove, and the fastener passes through the slider.

[0011] Optionally, the test system also includes a temperature measurement component; the temperature measurement component includes a thermocouple, insulating tape and thermal insulation tape, the insulating tape is affixed to the side of the single cell opposite to another single cell, the thermal insulation tape is attached to the insulating tape, the thermal insulation tape is provided with a hollow groove, and the thermocouple is assembled in the hollow groove.

[0012] Optionally, the test system also includes an airflow measurement component; the airflow measurement component includes an explosion-proof cover, an air duct and a gas flow meter, the explosion-proof cover is used to be set on the explosion-proof valve of the single cell, the air duct connects the explosion-proof cover with the outside world, and the gas flow meter is set on the air duct for measuring the gas flow.

[0013] Optionally, the base includes a bottom plate and side beams. The bottom plate is used to support the battery module. The side beams are placed horizontally at both ends of one side of the bottom plate to abut against and limit the battery module. The side beams are provided with connection holes for fixing parts to pass through and fix the battery module.

[0014] Optionally, the support assembly further includes a thermally conductive adhesive layer, which is attached to the area of the bottom plate between the side beams, and the thermally conductive adhesive layer is used to contact the battery module.

[0015] The beneficial effects of the present invention are:

[0016] Different from the existing technology, the present application simultaneously sets up a displacement measurement component and a pressure measurement component. The displacement measurement component monitors the displacement changes of the end plate of the battery module and records the displacement of the end plate to provide basic information for the subsequent analysis of the expansion behavior of the battery module when overcharged. At the same time, the pressure measurement component is responsible for real-time monitoring of the pressure distribution between the single cells inside the battery module. The pressure test unit is arranged between each single cell to capture the pressure data of the end face of each single cell. At the same time, the data transmission unit transmits the collected pressure data to the computing system to ensure that researchers can obtain information about the internal mechanical state of the battery in a timely manner. Through the combination of the displacement measurement component and the pressure measurement component, a comprehensive data analysis framework is formed. The cross-analysis of displacement data and pressure data can reveal the mechanical characteristics of the battery module in the overcharge state and its changing laws. Through systematic testing and analysis, researchers can more comprehensively evaluate the performance and safety of the battery module under extreme conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0018] Figure 1 This is a schematic diagram of the structure of the test system provided by the embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the pressure measurement component in the test system provided by an embodiment of the present utility model;

[0020] Figure 3 This is an exploded view of the pressure measurement assembly in the test system provided by an embodiment of the present utility model;

[0021] Figure 4 The embodiment of the present utility model provides Figure 1 A partial enlarged schematic diagram of area A in the middle;

[0022] Figure 5 This is a schematic diagram of the structure of the displacement measurement component in the test system provided by an embodiment of the present utility model;

[0023] Figure 6 The embodiment of the present utility model provides Figure 5 Schematic diagram of the cross-sectional structure at AA in the middle;

[0024] Figure 7 The embodiment of the present utility model provides Figure 5Schematic diagram of the cross-sectional structure at the middle BB;

[0025] Figure 8 This is a schematic diagram of the structure of the temperature measurement component in the test system provided by an embodiment of the present utility model;

[0026] Figure 9 The embodiment of the present utility model provides Figure 1 A partial enlarged schematic diagram of area B in the middle;

[0027] Figure 10 It is a schematic diagram of the structure of the support assembly in the test system provided by an embodiment of the present utility model.

[0028] Description of Figure Numbers:

[0029] 10. Battery module;

[0030] 20. Support assembly; 201. Base; 2011. Bottom plate; 2012. Side beam; 20121. Connection hole; 202. Thermal adhesive layer;

[0031] 30. Displacement measurement assembly; 301. Support column; 302. Displacement meter; 3021. Abutment column; 3022. Mounting seat; 30221. Mounting hole; 3023. Guide rail; 3024. Support seat; 30241. Gap groove; 30242. Slide groove; 30243. Opening; 3025. Fastener; 3026. Slider;

[0032] 40. Pressure measurement component; 401. Pressure testing unit; 402. Data transmission unit;

[0033] 50. Temperature measurement component; 501. Thermocouple; 502. Insulation tape; 503. Thermal insulation tape; 5031. Hollow slot;

[0034] 60. Airflow measurement assembly; 601. Explosion-proof cover; 602. Air duct; 603. Gas flow meter. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] See also Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the test system structure provided by an embodiment of the present utility model. Figure 2Schematic diagram of the structure of the pressure measurement component 40 in the test system provided by an embodiment of the present invention.

[0037] The present embodiment provides a testing system for comprehensively monitoring the mechanical properties of a lithium-ion battery module 10 in an overcharged state. The testing system includes a support assembly 20, a displacement measurement assembly 30, and a pressure measurement assembly 40, each of which works in concert to ensure data accuracy and reliability.

[0038] The support assembly 20 includes a base 201 , which is used to support the battery module 10 to ensure that the module will not be displaced or tilted due to external interference during the test process.

[0039] The displacement measuring assembly 30 includes a support column 301 and a displacement measuring device 302. One end of the support column 301 is fixed to the base 201, and the other end is connected to the displacement measuring device 302. The support column 301 can be adjusted by a variety of automatic lifting devices, such as a gear rack, an electric lifting rod, or a screw nut, so as to accurately monitor the deformation of the end plate of the battery module 10 at different positions. The displacement measuring device 302 can adopt a mechanical structure, a laser displacement sensor, an ultrasonic displacement sensor, a photoelectric displacement sensor, or a grating ruler, etc. The specific selection depends on the actual measurement needs and accuracy requirements. Through the displacement measuring device 302, the test system can obtain the displacement of the battery module 10 in real time during the overcharging process, providing an important basis for subsequent data analysis.

[0040] The pressure measurement assembly 40 includes a pressure testing unit 401 and a data transmission unit 402. The pressure testing unit 401 is positioned between the individual cells in the battery module 10 to collect pressure data from the end faces of each cell. The data transmission unit 402, located externally, is responsible for transmitting the collected pressure data in real time to a computing system for data processing and analysis. To meet diverse testing requirements, the number, location, and distribution of the pressure measurement assemblies 40 can be flexibly adjusted to ensure a comprehensive picture of the pressure distribution within the battery module 10.

[0041] In this embodiment, the testing system combines a displacement measurement assembly 30 and a pressure measurement assembly 40 to comprehensively test the mechanical properties of the battery module 10 in an overcharged state, ensuring the comprehensiveness and accuracy of the data. The core function of the displacement measurement assembly 30 is to monitor the displacement changes of the end plate of the battery module 10 in real time and record the displacement of the end plate, providing basic information for subsequent analysis of the expansion behavior of the battery module 10 during overcharge. The automatic lifting device of the support column 301 allows the displacement meter 302 to be flexibly adjusted to different positions, capturing the tiny deformation of the end plate during the overcharge process.

[0042] Meanwhile, the pressure measurement assembly 40 is responsible for real-time monitoring of the pressure distribution between the individual cells within the battery module 10. The pressure test unit 401 is positioned between the individual cells to capture pressure data on the end faces of each cell. Simultaneously, the data transmission unit 402 transmits the collected pressure data to the computing system, ensuring that researchers can obtain timely information on the internal mechanical state of the battery.

[0043] The combination of the displacement measurement assembly 30 and the pressure measurement assembly 40 forms a comprehensive data analysis framework. Cross-analysis of displacement and pressure data can reveal the mechanical properties of the battery module 10 and their changing patterns when overcharged. For example, the relationship between displacement increments and internal pressure distribution provides new insights into the expansion mechanism of the battery module 10. Through systematic testing and analysis, researchers can more comprehensively assess the performance and safety of the battery module 10 under extreme conditions.

[0044] Further, see Figure 3 , Figure 3 This is an exploded view of the pressure measurement assembly 40 in the test system provided by an embodiment of the present invention. In order to comprehensively and accurately record the end force distribution of the single cells in the battery module 10 during the test, the pressure test section 401 is designed to cover the side of the single cell, and its area is larger than the area of the side of the single cell, so that the pressure test section 401 can cover every corner of the battery side, thereby ensuring that every pressure on the side is effectively recorded during the test, avoiding the overall analysis results being affected by the loss of local data. Structurally, the pressure test section 401 is composed of multiple pressure sensors, which are evenly distributed within the coverage area of the test section, forming a comprehensive pressure monitoring network.

[0045] In this embodiment, because the coverage area of the pressure test section 401 is larger than the side surface of the single cell, data deviations caused by local measurement errors can be significantly reduced. This approach improves data acquisition accuracy and provides a more solid foundation for subsequent data analysis. This approach is widely used in a variety of fields, including lithium-ion battery safety research, performance evaluation, and design optimization, providing researchers with more comprehensive and detailed test data and promoting in-depth development in related fields.

[0046] Further, see Figure 4 , Figure 4 The embodiment of the present utility model provides Figure 1 The partially enlarged schematic diagram of area A in the middle shows a specific configuration of the displacement meter 302, including an abutment column 3021, a mounting seat 3022, a guide rail 3023 and a support seat 3024, which is intended to achieve accurate measurement of the displacement of the battery module 10.

[0047] The support base 3024 is located at the top of the support column 301, serving as the bearing base of the entire displacement measurement assembly 30 to ensure its stability. The guide rail 3023 is fixedly set at the top of the support base 3024, and its direction is perpendicular to the direction of the end face of the battery module 10, ensuring that the measuring direction of the displacement meter 302 is consistent with the expansion direction of the battery module 10, so that the displacement changes of the battery module 10 in the overcharge state can be accurately captured. A sliding connection is adopted between the mounting base 3022 and the guide rail 3023, so that it can move freely along the length direction of the guide rail 3023. The abutment column 3021 is passed through the mounting base 3022 and is responsible for directly contacting the end plate of the battery module 10. When the battery module 10 expands, the abutment column 3021 can smoothly drive the mounting base 3022 to slide along the guide rail 3023, thereby realizing real-time recording of the displacement of the battery module 10.

[0048] In addition, the abutment column 3021 is designed as an adjustable structure, which can be flexibly adjusted according to the specific size and shape of the battery module 10 to ensure that it is in close contact with the battery module 10, so that the displacement meter 302 can be widely used in testing battery modules 10 of different models and specifications.

[0049] In this embodiment, because the mounting base 3022 of the displacement meter 302 is slidably connected to the guide rail 3023, and the abutment post 3021 directly abuts the end surface of the battery module 10, the abutment post 3021 can accurately drive the mounting base 3022 to slide along the guide rail 3023 during battery expansion. This motion mechanism enables the testing system to record deformation data in real time, conveying information about the expansion force of the end plate of the battery module 10 and providing an important basis for subsequent analysis.

[0050] Further, see Figures 5 to 7 , Figure 5 This is a schematic diagram of the structure of the displacement measurement component 30 in the test system provided by the embodiment of the utility model. Figure 6 The embodiment of the present utility model provides Figure 5 Schematic diagram of the cross-sectional structure at AA in the middle, Figure 7 The embodiment of the present utility model provides Figure 5Schematic diagram of the cross-sectional structure at point BB in the middle. Considering the stability of the mounting base 3022 during movement, the displacement meter 302 also includes a fastener 3025 to enhance the connection strength and stability between the various components. Specifically, the mounting base 3022 is designed with multiple mounting holes 30221 to provide reliable fixing points. On the support base 3024, a clearance groove 30241 is provided along the length of the abutment column 3021 to take into account the relative sliding between the mounting base 3022 and the support base 3024 during displacement measurement. The presence of the clearance groove 30241 provides the necessary range of motion for the fastener 3025, ensuring that the connection between the mounting base 3022 and the support base 3024 is both firm and flexible, allowing free sliding during displacement measurement. The fastener 3025 passes through the mounting holes 30221 and the clearance groove 30241, tightly connecting the mounting base 3022 to the support base 3024, preventing the mounting base 3022 from shifting or loosening during movement.

[0051] In this embodiment, fasteners 3025 are provided, significantly enhancing the stability of the connection between mounting base 3022 and support base 3024. This allows mounting base 3022 to slide accurately and stably along guide rail 3023, avoiding measurement errors caused by loose fixation. The combination of fasteners 3025, mounting holes 30221, and clearance slots 30241 ensures the stability of mounting base 3022 during movement while maintaining displacement measurement. This provides a solid foundation for performance testing of lithium-ion battery modules 10 in an overcharged state.

[0052] Furthermore, to ensure that the mounting base 3022 does not experience errors due to uneven force or vibration during its sliding motion on the guide rail 3023, the displacement meter 302 is specifically provided with a slider 3026. A slide groove 30242 is defined along the length of the abutment column 3021 in the support base 3024, within which the slider 3026 can slide freely. The clearance groove 30241 communicates with the slide groove 30242, allowing the mounting base 3022 to move freely during sliding. Fasteners 3025 securely connect the slider 3026 to the mounting base 3022 through a fixed connection, ensuring that their relative position remains unchanged during sliding.

[0053] In this embodiment, the sliding connection between slider 3026 and slot 30242, combined with fastener 3025, further enhances guidance, allowing mounting base 3022 to slide smoothly during displacement measurement. Furthermore, slider 3026 provides additional support points for the movement of mounting base 3022, thereby ensuring more uniform force distribution across mounting base 3022. The additional support points of slider 3026 effectively prevent measurement errors caused by uneven force or external vibration, ensuring accurate measurement data under dynamic conditions.

[0054] Furthermore, to facilitate observation of the fit between the fastener 3025 and the slider 3026, an opening 30243 is provided on the side of the support base 3024, away from the fastener 3025. The shape and size of the opening 30243 can be adjusted according to specific needs without affecting the overall structural strength. The opening 30243 is connected to the chute 30242, providing researchers with a clear view, allowing them to quickly confirm the securement of the fastener 3025 and the movement of the slider 3026 within the chute 30242.

[0055] In this embodiment, the presence of opening 30243 allows researchers to directly observe whether fastener 3025 is securely connected, loose, or worn. This structure facilitates maintenance and debugging of the device, allowing for prompt action when problems are discovered, ensuring smooth testing.

[0056] Further, see Figure 8 , Figure 8 The figure is a schematic diagram of the structure of the temperature measurement component 50 in the test system provided by an embodiment of the present invention. The test system also includes a temperature measurement component 50, which is designed to monitor the temperature changes generated by the battery module 10 during the overcharging process to provide a more comprehensive analysis of the battery module 10. The temperature measurement component 50 includes a thermocouple 501, insulating tape 502, and thermal insulation tape 503. Specifically, the insulating tape 502 is affixed to the side of the single cell opposite to another single cell. It can maintain excellent insulation properties under high temperature conditions and prevent the measurement results from being affected by temperature changes. The thermal insulation tape 503 is attached to the insulating tape 502 and is designed with a hollow groove 5031. The thermocouple 501 is placed in the hollow groove 5031, forming an independent and enclosed area. The presence of the thermal insulation tape 503 effectively isolates heat conduction from the external environment, preventing external heat from interfering with temperature measurement. The thermocouple 501 is used to detect temperature changes on the surface of the single cell.

[0057] In this embodiment, the temperature measurement assembly 50 integrates both insulation and thermal insulation functions, ensuring the accuracy of the thermocouple 501 during measurement. By acquiring temperature data, researchers can promptly understand the thermal behavior of the battery module 10, providing important evidence for subsequent analysis.

[0058] Further, see Figure 9 , Figure 9 The embodiment of the present utility model provides Figure 1A partial enlarged schematic diagram of area B in the middle. The test system also includes an airflow measurement component 60, which is intended to monitor the gas release that may be generated by the battery module 10 in an overcharged state to ensure the safety and effectiveness of the system. The airflow measurement component 60 includes an explosion-proof cover 601, an air duct 602 and a gas flow meter 603. Specifically, the explosion-proof cover 601 is arranged on the explosion-proof valve of the single battery, and its main function is to effectively collect the gas that may be released by the battery when overcharged. In addition, the explosion-proof cover 601 is made of high-strength material and can maintain structural stability under high pressure or high temperature conditions, thereby protecting the safety of the operator. Connected to the explosion-proof cover 601 is the air duct 602, which is responsible for safely diverting the gas in the explosion-proof cover 601 to the external environment. The gas flow meter 603 arranged on the air duct 602 is used to measure the gas flow in real time.

[0059] In this embodiment, the airflow measurement assembly 60 provides crucial data support for battery safety assessments by accurately measuring gas flow. By monitoring the gas release rate in real time, researchers can assess the risk of battery overcharge. This data provides a basis for timely action, helping to prevent unexpected incidents and enhancing the overall safety of the test system.

[0060] Further, see Figure 10 , Figure 10 Figure 2 is a schematic diagram of the structure of the support assembly 20 in the test system provided by an embodiment of the present invention. To ensure stable installation of the battery module 10 during testing, the base 201 is designed to include two parts: a bottom plate 2011 and side beams 2012. The main function of the bottom plate 2011 is to support the battery module 10. The side beams 2012 are placed horizontally at both ends of one side of the bottom plate 2011. The side beams 2012 are in contact with the battery module 10, and are responsible for abutting and limiting the battery module 10 to ensure that it does not loosen during testing.

[0061] In addition, the side beam 2012 is provided with connection holes 20121 for fasteners to pass through and connect to the battery module 10, thereby further securing the battery module 10 to the base 201. The position and number of the connection holes 20121 can be adjusted according to specific needs to facilitate installation and removal.

[0062] In this embodiment, the strength of the base plate 2011 is combined with the limiting function of the side beams 2012 to form a solid and reliable foundation, ensuring the stability of the battery module 10 under various test conditions and avoiding measurement errors caused by displacement or vibration.

[0063] Furthermore, to address heat dissipation issues within the battery module 10, the support assembly 20 also includes a thermally conductive adhesive layer 202. The thermally conductive adhesive layer 202 is applied to the area between the bottom plate 2011 and the side beams 2012, ensuring contact with the battery module 10. Made of a material with high thermal conductivity, the thermally conductive adhesive layer 202 significantly improves heat transfer efficiency between the battery module 10 and the bottom plate 2011.

[0064] In this embodiment, the thermally conductive adhesive layer 202 enhances the heat dissipation capability of the battery module 10 while also providing safety assurance. By effectively and promptly dissipating the heat generated by the battery module 10, the risk of heat accumulation at the bottom of the battery during overcharging, which could create a safety hazard, is significantly reduced.

[0065] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship and movement status of the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0066] It should also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element through an intervening element.

[0067] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0068] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A testing system, characterized in that: include: A support assembly, comprising a base, the base being used to support the battery module; A displacement measuring assembly, comprising a support column and a displacement measuring device, wherein one end of the support column is fixedly connected to the base, and the other end of the support column is connected to the displacement measuring device, and the displacement measuring device is used to measure the displacement of the battery module in an overcharge state; The pressure measurement assembly includes a pressure testing part and a data transmission part that are connected to each other. The pressure testing part is arranged between the single batteries in the battery module to collect pressure data, and the data transmission part is exposed to the outside for data transmission.

2. A test system according to claim 1, characterized in that: The pressure testing portion is used to cover the side surface of the single battery, and the area of the pressure testing portion is larger than the area of the side surface of the single battery.

3. A test system according to claim 1, characterized in that: The displacement meter includes an abutment column, a mounting seat, a guide rail and a support seat. The support seat is connected to the base, the guide rail is set on the support seat, the mounting seat is slidably connected to the guide rail, the abutment column is passed through the mounting seat, the abutment column is used to abut with the battery module, and the abutment column is used to drive the mounting seat to slide.

4. A test system according to claim 3, characterized in that: The displacement meter further includes a fastener. The mounting seat is provided with a mounting hole. The support seat is provided with a clearance groove along the length direction of the abutment column. The fastener sequentially passes through the mounting hole and the clearance groove.

5. A test system according to claim 4, characterized in that: The displacement meter further includes a slider, the support seat is provided with a slide groove along the length direction of the abutment column, the give way groove is connected to the slide groove, the slider is slidably connected to the slide groove, and the fastener is fixedly connected to the slider.

6. A test system according to claim 5, characterized in that: An opening is formed on a side of the support seat away from the fastener, the opening is communicated with the slide groove, and the fastener passes through the slider.

7. A testing system according to claim 1, characterized in that: The test system also includes a temperature measurement component; The temperature measurement component includes a thermocouple, insulating tape and thermal insulation tape. The insulating tape is attached to the side of the single cell opposite to another single cell. The thermal insulation tape is attached to the insulating tape. The thermal insulation tape is provided with a hollow groove, and the thermocouple is assembled in the hollow groove.

8. A testing system according to claim 1, characterized in that: The test system also includes an airflow measurement component; The airflow measurement assembly includes an explosion-proof cover, an air duct and a gas flow meter. The explosion-proof cover is used to be set on the explosion-proof valve of the single battery. The air duct connects the explosion-proof cover with the outside world. The gas flow meter is set on the air duct for measuring gas flow.

9. A testing system according to claim 1, characterized in that: The base includes a bottom plate and side beams. The bottom plate is used to carry the battery module. The side beams are placed horizontally at both ends of one side of the bottom plate to abut against and limit the battery module. The side beams are provided with connecting holes for fixing parts to pass through and fix the battery module.

10. A test system according to claim 9, characterized in that: The support assembly further includes a thermally conductive adhesive layer, which is attached to the area of the bottom plate between the side beams and is used to contact the battery module.

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