Battery module testing device

Abstract

The embodiment of the invention provides a battery module testing device, and relates to the technical field of batteries. The battery module testing device comprises a box body, a voltage adjusting part and a protection part. The voltage regulating part is used for being electrically connected with different battery modules; the protection part is arranged between the voltage regulation part and the battery module; and the protection piece is configured to be disconnected when the voltage regulation piece and the battery module form a loop. By adjusting the voltage condition applied by the voltage adjusting part, one battery module is induced to enter a thermal runaway state, and the influence of thermal runaway on adjacent battery modules is researched, so that the testing of the mutual influence of different battery modules is realized, the testing efficiency is improved, and the testing accuracy is ensured.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery module testing device. Background Art

[0002] Both battery pack thermal runaway testing and module-level testing are used to evaluate battery safety.

[0003] In related technologies, module-level testing is used to verify the performance of battery modules under different operating conditions, including capacity, efficiency, and charge and discharge characteristics. Module-level testing targets individual battery modules or cells, evaluating their performance, consistency, cycle life, and other indicators.

[0004] However, this module-level test has the problem of poor testing effect. Summary of the Invention

[0005] The embodiment of the present application provides a battery module testing device, which realizes the testing of the mutual influence of different battery modules, improves the testing efficiency, and ensures the accuracy of the testing.

[0006] The present invention provides a battery module testing device, comprising:

[0007] The box body has a receiving cavity for placing the battery module;

[0008] A voltage regulator, which is used to electrically connect to different battery modules;

[0009] The protective component is arranged between the voltage regulating component and the battery module; the protective component is configured to be disconnected when the voltage regulating component and the battery module form a loop.

[0010] In some embodiments of the present application, the battery module testing device further includes a conductor detection component; the conductor detection component is arranged in the box, and the first connection end and the second connection end of the conductor detection component are respectively used to connect to the input end and the output end of the voltage regulating component.

[0011] When the battery module thermally runs away and the battery cell explosion-proof valve of the battery module ejects ejected material, the conductor detection component is in a conducting state, so that the voltage regulating component and the conductor detection component form a circuit.

[0012] In some embodiments of the present application, the battery module testing device further includes a cover; the box body has an opening communicating with the accommodating cavity, and the cover body is disposed on the opening.

[0013] A plurality of grooves are provided on one side of the box body close to the opening; the depth direction of the grooves is parallel to a first direction perpendicular to the height direction of the box body.

[0014] A plurality of grooves are arranged at intervals along the height direction of the box body.

[0015] The cover is slidably arranged in the groove.

[0016] In some embodiments of the present application, the conductor detection member further includes a first conductor, a second conductor and a detection portion.

[0017] Along the height direction of the box body, the first conductor and the second conductor are arranged between the battery module and the cover body.

[0018] Along a direction perpendicular to the height of the box, the connection end of the first conductor forms a first connection end; and the connection end of the second conductor forms a second connection end.

[0019] There is a gap between the first conductor and the second conductor.

[0020] The cell explosion-proof valve of the battery module is arranged close to the cover body; along the height direction of the box body, the cell explosion-proof valve and the gap are arranged relatively.

[0021] When the battery module thermally runs away and the ejection material from the battery module's cell explosion-proof valve passes through the gap, the conductor detection component is in a conductive state, and the first conductor, the second conductor, the detection unit and the voltage adjustment component are used to be connected in series in sequence to form a loop.

[0022] In some embodiments of the present application, the battery module testing device further includes a pressing member, which is disposed on a side of the cover body facing away from the box body.

[0023] The pressing member includes at least two first pressing parts and at least two second pressing parts. The first pressing parts extend along a first direction perpendicular to the height direction of the box body, and the at least two first pressing parts are spaced apart along a second direction perpendicular to the height direction of the box body.

[0024] The second pressing portion extends perpendicular to the second direction; at least two second pressing portions are spaced apart along the first direction.

[0025] In some embodiments of the present application, the box body includes side panels and a bottom panel, which are connected to the bottom panel and arranged along the circumference of the bottom panel; the side panels and the bottom panel surround and form a receiving cavity.

[0026] The bottom plate is formed with a bottom plate accommodating cavity, and the bottom plate accommodating cavity is used for accommodating the cooling liquid.

[0027] The liquid inlet and the liquid outlet of the bottom plate accommodating cavity are respectively provided with temperature detection components.

[0028] In some embodiments of the present application, the battery module testing device further includes a liquid inlet and outlet structure and a liquid supply component, and the liquid inlet and outlet structure connects the liquid supply component and the bottom plate accommodating cavity.

[0029] The liquid supply part is used for supplying cooling liquid to the bottom plate accommodating cavity.

[0030] The box body is provided with openings, and the liquid inlet and outlet structure part is penetrated by the openings.

[0031] In some embodiments of the present application, the battery module testing device further includes a needle, which is disposed on the outside of the box.

[0032] The box body is provided with an opening, the opening direction of the opening is parallel to the moving direction of the needle; the opening is used for the needle to pass through.

[0033] In some embodiments of the present application, the battery module testing device further includes a first clamping arm, a second clamping arm and a driving member; the driving member is configured to provide a clamping force to the first clamping arm and / or the second clamping arm.

[0034] Along the height direction perpendicular to the box body, a clamping space for accommodating the battery module is formed between the first clamping arm and the second clamping arm.

[0035] In some embodiments of the present application, the battery module testing device further includes a pressure relief member, a pressure relief port is provided on the box body, and the pressure relief member is provided at the pressure relief port.

[0036] The battery module testing device provided in the embodiments of the present application includes a housing, a voltage regulator, and a protective member. The housing has a cavity for accommodating the battery module; the voltage regulator is used to electrically connect to different battery modules; and the protective member is disposed between the voltage regulator and the battery module. The protective member is configured to disconnect when the voltage regulator and the battery module form a circuit.

[0037] In the battery module testing device provided by the embodiment of the present application, a voltage regulator is arranged between different battery modules, and the voltage regulator can adjust the potential difference between the two battery modules. The existence of the potential difference can help study how the state change of one battery module affects another battery module under electrical faults or abnormal conditions. By adjusting the voltage conditions applied by the voltage regulator, a battery module can be induced to enter a thermal runaway state. In this case, by observing the reaction of another battery module, the impact of thermal runaway on adjacent modules can be studied, thereby realizing the test of the mutual influence of different battery modules, improving the test efficiency, and ensuring the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0039] Figure 1 A schematic diagram of the structure of a battery module testing device provided in an embodiment of the present application;

[0040] Figure 2 Schematic diagram of the box structure of the battery module testing device provided in the embodiment of the present application Figure 1 ;

[0041] Figure 3Schematic diagram of the box structure of the battery module testing device provided in the embodiment of the present application Figure 2 ;

[0042] Figure 4 A schematic diagram of the cover structure of the battery module testing device provided in an embodiment of the present application.

[0043] Description of reference numerals:

[0044] 100: box body; 110: groove; 120: opening;

[0045] 200: voltage regulator;

[0046] 300: cover;

[0047] 400: first pressing portion; 410: second pressing portion;

[0048] 500: first clamping arm; 510: second clamping arm;

[0049] 600: Battery module.

[0050] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0051] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0052] Thermal runaway testing is a core component of battery safety assessments. It is used to evaluate the failure modes and severity of battery damage under extreme conditions. Currently, thermal runaway testing includes two methods: pack-level testing and module-level testing.

[0053] Pack-level testing examines the complete battery pack (including all battery modules, battery management system, cooling system, structural components, etc.) for thermal runaway triggers (e.g., puncture, overcharging, heating, etc.). Pack-level testing monitors parameters such as heat propagation paths, gas emissions, flame spray, and voltage / temperature variations. Pack-level testing reflects thermal runaway behavior under actual operating conditions, including thermal interactions between battery modules, structural constraints, and the impact of the cooling system.

[0054] However, pack-level testing consumes the entire battery pack (especially large-capacity packs, such as those above 100kWh) for a single test, resulting in extremely high material costs. Furthermore, pack-level testing requires a complete system setup, making test preparation and subsequent analysis time-consuming.

[0055] To reduce testing costs and improve efficiency, module-level testing has been introduced. Module-level testing tests individual modules or cells for thermal runaway, typically omitting the battery pack structure and system interactions. Module-level testing focuses on evaluating cell consistency and the rate of heat spread within the battery module.

[0056] The module-level testing process is as follows: Select representative battery modules or cells from the production line to ensure that the samples can reflect the consistency of the batch. Prepare the equipment required for testing, including a hot box, charging and discharging equipment, temperature sensors, pressure sensors, etc. Inspect the appearance of the battery module or cell for damage or defects. Conduct preliminary electrical performance tests, such as open circuit voltage and internal resistance, to ensure that the sample is in normal working condition. Perform charge and discharge cycle tests on the battery module to measure its actual capacity. Perform multiple charge and discharge cycles to evaluate the cycle life and performance degradation of the battery. Test the performance consistency of multiple modules or cells to ensure the stability of product quality.

[0057] However, module-level testing ignores the thermal accumulation effects at the battery pack level (such as heat radiation and exhaust superposition from adjacent modules).

[0058] In summary, the existing module-level testing has the problem of poor testing effect.

[0059] In view of this, an embodiment of the present application provides a battery module testing device comprising a housing, a voltage regulator, and a protective member. The housing has a cavity for accommodating the battery modules; the voltage regulator is configured to electrically connect to different battery modules; and the protective member is disposed between the voltage regulator and the battery modules. The protective member is configured to disconnect when the voltage regulator and the battery modules form a circuit.

[0060] In the battery module testing device provided by the embodiment of the present application, a voltage regulator is arranged between different battery modules, and the voltage regulator can adjust the potential difference between the two battery modules. The existence of the potential difference can help study how the state change of one battery module affects another battery module under electrical faults or abnormal conditions. By adjusting the voltage conditions applied by the voltage regulator, a battery module can be induced to enter a thermal runaway state. In this case, by observing the reaction of another battery module, the impact of thermal runaway on adjacent modules can be studied, thereby realizing the test of the mutual influence of different battery modules, improving the test efficiency, and ensuring the accuracy of the test.

[0061] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0062] Reference Figure 1 As shown, an embodiment of the present application provides a battery module testing device, comprising:

[0063] The box body 100 has a receiving cavity for placing the battery module 600;

[0064] A voltage regulator 200, which is used to electrically connect to different battery modules 600;

[0065] The protective component is arranged between the voltage regulating component 200 and the battery module 600; the protective component is configured to be disconnected when the voltage regulating component 200 and the battery module 600 form a loop.

[0066] For example, the box 100 provides a closed or semi-closed environment for placing and protecting the battery module 600. The design of the box 100 can help control the temperature, humidity and other conditions of the test environment.

[0067] The accommodating cavity of the box 100 can ensure that multiple battery modules 600 are tested in a relatively close physical space, which helps to observe the conduction and diffusion effects of heat between the battery modules 600 during thermal runaway.

[0068] The voltage regulator 200 is used to electrically connect two different battery modules 600. The voltage regulator 200 and the battery modules 600 are connected via wires. The voltage regulator 200 can apply different voltage conditions. This can be used to simulate the electrical load in actual use. In this way, the positive pole of one battery module 600 is connected to the input end of the voltage regulator 200, and the output end of the voltage regulator 200 is connected to the negative pole of the other battery module 600. By adjusting the output voltage, the voltage regulator 200 can change the potential difference between the two battery modules 600. The voltage regulator 200 is used to adjust the voltage between the two battery modules 600.

[0069] The protective element, located between the voltage regulator 200 and the battery module 600, is primarily designed to disconnect the circuit when thermal runaway is detected. In the event of thermal runaway, disconnection of the protective element prevents the runaway battery module 600 from causing further electrical impact on adjacent battery modules 600. By observing the triggering of the protective element, the impact of thermal runaway on the electrical system can be assessed and the effectiveness of the protective mechanism verified.

[0070] The voltage regulator 200 can be a voltage regulator. This regulator is used to provide a stable voltage input to the battery module 600. It regulates and maintains the voltage level, ensuring controllable electrical conditions during testing. By using a voltage regulator, different electrical load conditions can be simulated to observe how changes in the electrical state of one battery module 600 affect another. For example, if voltage instability or overload occurs in one module, a voltage regulator can help study the impact of these changes on adjacent battery modules 600.

[0071] The protective element may be a fuse. A fuse is a safety protection device designed to automatically disconnect the circuit when the current exceeds a predetermined value, thereby preventing overcurrent from damaging the battery module 600 and the voltage regulator.

[0072] In the battery module testing device provided by the embodiment of the present application, the voltage regulator 200 is arranged between different battery modules 600, and the voltage regulator 200 can adjust the potential difference between the two battery modules 600. By setting different voltage levels, the interaction of the battery modules 600 under different charge and discharge states can be simulated. The existence of the potential difference can help study how the state change of one module affects another module under electrical faults or abnormal conditions. For example, the current flow and voltage changes under overcharge, overdischarge or short circuit conditions. By applying specific voltage conditions through the voltage regulator 200, a battery module 600 can be induced to enter a thermal runaway state. In this case, by observing the reaction of another battery module 600, the impact of thermal runaway on the adjacent module can be studied, thereby realizing the test of the mutual influence of different battery modules 600, improving the test range of the battery module testing device, improving the test efficiency of the battery module testing device, and ensuring the test accuracy of the battery module testing device.

[0073] The voltage regulator 200 can help researchers adjust the voltage level freely according to specific test requirements. In this way, the battery module testing device can help researchers study the response and stability of the battery module 600 under different pressures.

[0074] For example, during use of the battery module testing device, the positive electrode of one battery module 600 is connected to the input of the voltage regulator 200, and the output of the voltage regulator 200 is connected to the negative electrode of another battery module 600. The voltage of the voltage regulator is adjusted to simulate the state of the battery module 600 at different voltages. When a cell in a battery module 600 experiences thermal runaway, electrolyte and other substances are discharged through the cell explosion-proof valve. Because the electrolyte is conductive, the flow of electrolyte may cause different battery modules 600 to be connected in series, thus forming a loop between the voltage regulator, the battery module 600, and the fuse. At this time, it is considered that the battery module 600 has experienced thermal runaway, and the distance between adjacent battery modules 600 is unsafe and needs to be adjusted later. Testing the distance between two adjacent battery modules 600 is crucial, as it affects the high-voltage tolerance and insulation performance, ensuring that the spacing between adjacent battery modules 600 is sufficient to support the potential difference between the battery modules 600.

[0075] As a feasible implementation method, refer to Figure 2 and Figure 3 As shown, the battery module testing device further includes a cover 300 ; the box 100 has an opening communicating with the accommodating cavity, and the cover 300 is disposed on the opening.

[0076] A plurality of grooves 110 are provided on one side of the box body 100 close to the opening; the depth direction of the grooves 110 is parallel to a first direction perpendicular to the height direction of the box body 100 .

[0077] Along the height direction of the box body 100 , a plurality of grooves 110 are arranged at intervals.

[0078] The cover 300 is slidably disposed in the groove 110 .

[0079] The first direction perpendicular to the height direction of the box 100 is referenced Figure 2 The second direction perpendicular to the height direction of the box 100 is referenced by Figure 2 The height direction of the box 100 is shown in the direction of X. Figure 2 The direction shown by Z.

[0080] For example, the cover 300 can protect the battery module 600 from external environmental influences, such as dust, moisture, or other contaminants, during testing. Furthermore, in the event of thermal runaway or other extreme conditions, the cover 300 can provide an additional safety barrier to prevent the escape of flames, heat, or explosive fragments. Furthermore, the cover 300 can help maintain the temperature and humidity conditions within the box 100, ensuring a stable and controllable testing environment.

[0081] The depth of the groove 110 extends along a first direction perpendicular to the height of the housing 100. Multiple grooves 110 are spaced apart along the height, providing a stable sliding track for the cover 300. This design allows the cover 300 to slide open when not in use, facilitating installation and removal of the battery module 600. Furthermore, it can be easily closed during testing, ensuring a sealed test environment.

[0082] By using the sliding cover 300 and the groove 110, the battery module testing device achieves a modular design, facilitating the testing of battery modules 600 of varying sizes and types. The sliding cover 300 design facilitates operation, allowing testers to quickly open and close the cover 300, reducing test preparation time. During testing, particularly under extreme conditions like simulating thermal runaway, the design of the cover 300 and the groove 110 provides additional safety protection, preventing accidents.

[0083] In summary, the cover 300 features an easily replaceable design, allowing for convenient replacement of covers 300 with different materials to verify their impact on battery pack thermal runaway conditions. The relative position of the cover 300 and the housing 100 is adjustable, with a pull-out design for easy operation and adjustment. This design enhances testing flexibility and applicability, helping to optimize battery pack design and safety standards.

[0084] As a feasible implementation manner, along the second direction perpendicular to the height of the box body 100 , the cross-sectional shape of the groove 110 includes square, circular, and polygonal shapes.

[0085] Illustratively, the square groove 110 provides straight edges and corners, which helps prevent the cover 300 from rotating or tilting during the sliding process, thereby ensuring its stability.

[0086] The circular groove 110 provides a smooth surface, reduces friction during sliding, and makes the cover 300 move more smoothly. The circular design can help the cover 300 automatically center during sliding, reducing the possibility of deviation.

[0087] The polygonal groove 110 can combine the advantages of a square and a circle, provide multiple planes and angles, enhance the stability of the cover 300, and maintain a certain sliding flexibility.

[0088] It is understood that the cover 300 is provided with protrusions on both sides. When the cover 300 covers the opening of the box 100, it is expected to be located in the groove 110. Along the second direction perpendicular to the height of the box 100, the cross-sectional shape of the protrusion can be square, circular, or polygonal to adapt to the groove 110.

[0089] As a feasible embodiment, the battery module testing device also includes a conductor detection component; the conductor detection component is arranged in the box 100, and the first connection end and the second connection end of the conductor detection component are respectively used to connect to the input end and the output end of the voltage adjustment component 200.

[0090] When the battery module 600 thermally runs away and the explosion-proof valve of the battery module 600 ejects the ejecta, the conductor detection component is in a conducting state, so that the voltage adjustment component 200 and the conductor detection component form a circuit.

[0091] For example, the conductor detection element is normally in a non-conductive state. When thermal runaway of the battery module 600 occurs, causing the cell explosion-proof valve to eject a propellant, the conductor detection element is triggered to enter a conductive state. In this way, the state of the conductor detection element is altered by physical contact with the propellant.

[0092] The first and second connection terminals of the conductor detection element are connected to the input and output terminals of the voltage regulator 200, respectively. When the conductor detection element is conductive, it forms a complete current loop with the voltage regulator 200. This loop can be used to detect whether the battery module is experiencing thermal runaway.

[0093] This design allows real-time monitoring of the battery module 600's status, determining whether thermal runaway has occurred by detecting the continuity of the conductor detection element. Once a continuity state is detected, appropriate safety measures can be quickly taken, such as disconnecting the power supply or sounding an alarm.

[0094] As a feasible implementation manner, the conductor detection member further includes a first conductor, a second conductor and a detection portion.

[0095] Along the height direction of the box body 100 , the first conductor and the second conductor are disposed between the battery module 600 and the cover body 300 .

[0096] Along a direction perpendicular to the height of the box body 100 , the connection end of the first conductor forms a first connection end; and the connection end of the second conductor forms a second connection end.

[0097] There is a gap between the first conductor and the second conductor.

[0098] The explosion-proof valve of the battery cell of the battery module 600 is arranged close to the cover 300 ; along the height direction of the box body 100 , the explosion-proof valve and the gap are arranged opposite to each other.

[0099] When the battery module 600 thermally runs away and the ejection material from the battery cell explosion-proof valve of the battery module 600 passes through the gap, the conductor detection component is in a conductive state, and the first conductor, the second conductor, the detection unit and the voltage adjustment component 200 are used to be connected in series in sequence to form a loop.

[0100] Exemplarily, the first and second conductors are disposed between the battery module 600 and the cover 300, with a gap between them perpendicular to the height of the housing 100. This arrangement ensures physical isolation of the conductors while providing the necessary electrical connection. The first and second conductors are used to transmit current and form the necessary connection paths in the circuit. The first and second conductors are located close to the battery cell explosion-proof valve to ensure that changes can be quickly detected when an abnormality occurs in the battery cell.

[0101] The gap between the first and second conductors is designed so that the cell explosion-proof valve faces it. In the event of thermal runaway or excessive pressure in the cell, the cell explosion-proof valve can directly release pressure or gas, affecting the electrical state of the first and second conductors through the gap. This design ensures that in abnormal situations, the first and second conductors can quickly respond to changes in the cell's state and trigger subsequent protection mechanisms.

[0102] The detection unit monitors the electrical conditions in the circuit, such as current. When an abnormality is detected, it can trigger a protection mechanism, such as disconnecting the circuit or sounding an alarm.

[0103] Among them, the detection part is an ammeter, which is used to monitor the current in the circuit in real time.

[0104] After the voltage regulator 200 is activated, the voltage is gradually increased to a preset runaway simulation condition, such as simulating an internal short circuit or overheating of the battery cell of the battery module 600. The monitoring detection unit displays the readings. When thermal runaway occurs in the battery module 600, the battery cell explosion-proof valve opens due to excessive internal pressure, and the ejected high-temperature and high-pressure ejecta passes through the gap. This indicates electrical conduction between the first conductor and the second conductor, and the circuit between the voltage regulator 200, the first conductor, the ejecta, the second conductor, and the detection unit is conductive. The detection unit displays the detection readings. At the same time, the actual distance between the battery cell explosion-proof valve and the gap at this time is recorded, which is the minimum safe distance under these conditions. This not only improves test efficiency but also ensures test accuracy, providing an important basis for the design of battery packs and the formulation of safety standards.

[0105] The ejected material from the battery cell explosion-proof valve is typically released when the internal pressure of the battery is too high. This includes electrolyte vapor or liquid electrolyte, gases, and solid particles. The electrolyte is the liquid used to conduct ions in the battery, typically consisting of an organic solvent and dissolved salts such as lithium salts. The electrolyte contains mobile ions that move within the liquid to conduct current. Therefore, when the electrolyte is ejected in vapor or liquid form, it has a certain degree of conductivity.

[0106] When the battery is overcharged, short-circuited, or in other abnormal conditions, the electrolyte may decompose and produce gases such as hydrogen, oxygen, or other organic gases. Although gases themselves are generally non-conductive, some gases may ionize under high temperature or high pressure conditions, thus becoming conductive to a certain extent.

[0107] In some cases, materials inside the battery, such as electrode materials, may be ejected in the form of tiny particles. These particles are composed of conductive materials such as metal or conductive carbon, which may have electrical conductivity.

[0108] By providing a first conductor, a second conductor and a detection unit, the battery module testing device not only improves the testing efficiency but also ensures the accuracy of the test, providing a basis for the design of the battery pack and the formulation of safety standards.

[0109] As a feasible implementation method, refer to Figure 4 As shown, the battery module testing device further includes a pressing member, which is disposed on a side of the cover 300 facing away from the box body 100 .

[0110] The pressing member includes at least two first pressing parts 400 and at least two second pressing parts 410. The first pressing parts 400 extend along a first direction perpendicular to the height direction of the box body 100, and the at least two first pressing parts 400 are spaced apart along a second direction perpendicular to the height direction of the box body 100.

[0111] The second pressing portion 410 extends perpendicular to the second direction; at least two second pressing portions 410 are spaced apart along the first direction.

[0112] For example, when the battery module 600 is used in a vehicle, the compression member can be used to simulate the mechanical stress and fixed state to which the battery module 600 is subjected in the vehicle. This is important for testing the performance and safety of the battery module 600 under actual use conditions. In addition, by applying appropriate pressure, the compression member can ensure that the battery module 600 remains stable during testing, preventing positional changes caused by vibration or other external forces.

[0113] The first pressing portion 400 extends in a first direction perpendicular to the height of the housing 100, and at least two first pressing portions 400 extend in a second direction perpendicular to the height of the housing 100. This design ensures uniform pressure distribution on the battery module 600, simulating the pressure it experiences in a vehicle. The first pressing portion 400 may be a plate.

[0114] The second pressing portion 410 extends along the second direction, and at least two second pressing portions 410 are spaced apart along the first direction. This design provides additional pressure points, ensuring that the battery module 600 is properly fixed and supported in different directions. The second pressing portion 410 can also be a plate.

[0115] Through this multi-directional, multi-point compression design, the battery module testing device can more realistically simulate the installation state of the battery module 600 in the vehicle, including the mechanical stress it is subjected to and the fixing method.

[0116] Under these simulated conditions, the performance and safety of the battery module 600 in actual use environments can be more accurately evaluated, including its response to vibration, shock, and other mechanical stresses. This design can also be used to test whether the battery module 600 can remain safe and stable under extreme conditions such as collisions or severe vibrations.

[0117] In a battery module testing device, the pressing member can take various forms to adapt to different testing needs and design requirements.

[0118] In some embodiments, the pressing member is a pressing plate, which is a simple mechanical structure made of a rigid material such as metal or high-strength plastic. The pressing plate has the advantages of simple structure and low cost.

[0119] In yet other embodiments, the pressing member further comprises a hydraulic drive unit. A hydraulic drive unit is a mechanical system that utilizes liquid pressure to transmit and amplify force. The hydraulic drive unit comprises a hydraulic pump, a hydraulic cylinder, and hydraulic oil. The basic principle of the hydraulic drive unit is to pressurize a liquid, typically hydraulic oil, via the hydraulic pump and convert this pressure into mechanical force or motion via the hydraulic cylinder, thereby causing the first pressing portion 400 and the second pressing portion 410 to press against the cover body 300.

[0120] Hydraulic systems transmit force through liquid pressure and are capable of applying high pressures. This allows for testing that simulates high load conditions or dynamically adjusts pressure.

[0121] As a feasible implementation, the box body 100 includes side panels and a bottom panel, which are connected to the bottom panel and arranged along the circumference of the bottom panel; the side panels and the bottom panel surround and form a receiving cavity.

[0122] The bottom plate is formed with a bottom plate accommodating cavity, and the bottom plate accommodating cavity is used for accommodating the cooling liquid.

[0123] The liquid inlet and the liquid outlet of the bottom plate accommodating cavity are respectively provided with temperature detection components.

[0124] For example, the box body 100 is composed of side panels and a bottom panel, wherein the side panels are arranged and connected along the circumference of the bottom panel to form a closed structure. The side panels and the bottom panel surround and form a receiving cavity for placing the battery module 600.

[0125] A dedicated bottom plate cavity is formed on the bottom plate to hold the coolant. This design ensures direct contact between the coolant and the bottom plate, effectively absorbing and conducting heat. The bottom plate cavity allows the coolant to flow beneath the bottom plate, removing heat and helping to maintain a stable temperature within the battery module 600.

[0126] The liquid inlet and outlet of the baseplate chamber are each equipped with temperature sensors. These sensors are used to monitor the temperature of the coolant. By monitoring the inlet and outlet temperatures of the coolant, the cooling system's heat dissipation efficiency can be assessed. The temperature sensors can be used as temperature sensors.

[0127] If the coolant temperature continues to rise, it may indicate abnormal heat generation within the battery module 600, such as battery cell aging, short circuits, or other faults. By analyzing this temperature data, operating parameters of the battery module 600, such as charge and discharge rates, can be analyzed to improve overall efficiency and performance through subsequent adjustments.

[0128] As a feasible implementation manner, the battery module testing device further includes a liquid inlet and outlet structure and a liquid supply component, wherein the liquid inlet and outlet structure connects the liquid supply component and the bottom plate accommodating cavity.

[0129] The liquid supply part is used to supply cooling liquid to the bottom plate accommodating cavity.

[0130] The box body 100 is provided with an opening 120 , and the liquid inlet and outlet structure is penetrated by the opening 120 .

[0131] For example, the liquid inlet and outlet structure connects the liquid supply part and the bottom plate receiving cavity, and is responsible for the input and output of the cooling liquid. A portion of the liquid inlet and outlet structure passes through the opening 120 on the box body 100 to connect to the external liquid supply system.

[0132] The liquid supply unit is responsible for supplying coolant to the base plate cavity. The liquid supply unit ensures a continuous supply of coolant to maintain effective thermal management.

[0133] The bottom plate cavity contains coolant, which is in direct contact with the battery module 600 to absorb and dissipate heat. The flow of coolant helps dissipate heat and maintain a stable temperature of the battery module 600.

[0134] The opening 120 of the housing 100 allows the liquid inlet and outlet structure to pass through for connecting to an external liquid supply component. The opening 120 design makes the installation and maintenance of the liquid inlet and outlet structure more convenient, reducing the downtime of the battery module testing device.

[0135] For example, by providing a bottom plate within the housing 100 and filling the bottom plate's accommodating cavity with refrigerant, the battery module testing apparatus can conduct liquid cooling experiments. This liquid cooling experiment can evaluate the heat dissipation performance and temperature control effectiveness of the battery pack under liquid cooling conditions, providing important data support for the battery pack's thermal management design.

[0136] As a feasible implementation, the battery module testing device further includes a puncture needle, which is disposed outside the box 100 .

[0137] The box body 100 is provided with an opening 120 , and the opening direction of the opening 120 is parallel to the moving direction of the needle; the opening 120 is used for the needle to pass through.

[0138] For example, the needle is used to penetrate the battery module 600 to simulate mechanical damage conditions, such as physical impact or puncture. The direction of the opening 120 is parallel to the moving direction of the needle to ensure that the needle can pass through smoothly.

[0139] Through the needle penetration test, the safety performance of the battery module 600 when subjected to mechanical damage, including thermal runaway, short circuit reaction and structural integrity, can be evaluated to evaluate the puncture resistance and explosion-proof performance of the battery pack.

[0140] Penetration by a needle can cause internal short circuits and thermal runaway in the battery, and testing can help evaluate how the battery responds in such situations, such as temperature rise, smoke, or fire.

[0141] Test the structural integrity of the battery module 600 under mechanical impact to ensure it does not suffer severe structural damage when subjected to external impact. Observe whether the battery leaks electrolyte or releases harmful gases after being punctured, and assess its leakage risk under mechanical damage.

[0142] As a feasible embodiment, the battery module testing device further includes a first clamping arm 500 , a second clamping arm 510 and a driving member; the driving member is configured to provide a clamping force to the first clamping arm 500 and / or the second clamping arm 510 .

[0143] Along a height direction perpendicular to the box body 100 , a clamping space for accommodating the battery module 600 is formed between the first clamping arm 500 and the second clamping arm 510 .

[0144] For example, the first clamping arm 500 and the second clamping arm 510 are used to secure the battery module 600 during testing, ensuring its stable position. A clamping space is formed between the first clamping arm 500 and the second clamping arm 510 to accommodate the battery module 600. The size and shape of this space can be adjusted according to the size of the battery module 600.

[0145] The driving member is used to provide a clamping force so that the first clamping arm 500 and / or the second clamping arm 510 can firmly clamp the battery module 600. The driving member can be a hydraulic, pneumatic, electric or mechanical device, and the specific selection depends on the required clamping force and control accuracy.

[0146] The design of the first clamping arm 500 and the second clamping arm 510 ensures that the battery module 600 remains stable during testing, preventing positional shifts caused by vibration or other external forces. The size of the clamping space can be adjusted to accommodate battery modules 600 of varying sizes, increasing the applicability of the testing device. The clamping arms provide additional protection during testing, preventing displacement or damage to the battery module 600 when subjected to external forces.

[0147] As a feasible implementation, the battery module testing device further includes a pressure relief member. A pressure relief port is provided on the box body 100 , and the pressure relief member is provided at the pressure relief port.

[0148] For example, the pressure relief member is used to control and release pressure within the housing 100, preventing damage or explosion of the housing 100 due to excessive pressure. During battery module 600 testing, particularly under extreme conditions such as needle penetration testing, the battery may generate significant amounts of gas or heat, leading to increased internal pressure. The pressure relief member promptly releases excess pressure, preventing the housing 100 from rupturing or exploding.

[0149] Through the pressure relief parts, the battery module test device can effectively manage and control the internal pressure to ensure the safety and stability of the test environment.

[0150] In the battery module testing device provided in the embodiment of the present application, the box 100 provides a closed or semi-closed environment for placing and protecting the battery module 600. The design of the box 100 helps to control the temperature, humidity and other conditions of the test environment.

[0151] The cover 300 is slidably disposed in the groove 110 of the box body 100 to protect the battery module 600 from external environmental influences and provide an additional safety barrier in the event of thermal runaway or other extreme conditions.

[0152] The voltage regulator 200 is used to adjust the potential difference between different battery modules 600 to simulate the mutual influence under electrical faults or abnormal conditions.

[0153] The protection element is disposed between the voltage regulator 200 and the battery module 600 and disconnects the circuit when thermal runaway is detected to prevent further electrical impact.

[0154] The bottom plate receiving cavity is used to contain coolant, which is in direct contact with the battery module 600 to absorb and dissipate heat.

[0155] The temperature detection component monitors the temperature changes of the coolant and evaluates the heat dissipation efficiency of the cooling system.

[0156] The puncture needle is used to simulate mechanical damage conditions and evaluate the safety performance of the battery module 600 when subjected to physical impact.

[0157] The pressure relief member is provided at the pressure relief port, and is used to control and release the pressure inside the box body 100 to prevent the box body 100 from being damaged or exploding due to excessive pressure.

[0158] The first clamping arm 500 and the second clamping arm 510 are used to fix the battery module 600 to ensure its stable position during the test process.

[0159] The driving member provides a clamping force to ensure that the clamping arm can firmly clamp the battery module 600 .

[0160] The first conductor and the second conductor are disposed between the battery module 600 and the cover 300 for transmitting current and forming a necessary connection path in the circuit.

[0161] Detection components are used to monitor the electrical status in the circuit, detect abnormal conditions and trigger protection mechanisms.

[0162] The pressing member simulates the mechanical pressure and fixed state of the battery module 600 in the vehicle, ensuring the stability of the battery module 600 during the test.

[0163] By combining these components, the battery module testing device can comprehensively evaluate the performance and safety of the battery module 600 under simulated electrical, mechanical, and environmental conditions. This battery module testing device not only improves testing efficiency but also ensures test accuracy, providing an important basis for battery pack design and the development of safety standards. This comprehensive testing approach can help identify potential safety hazards, optimize the design of the battery module 600, and improve its reliability and safety in practical applications.

[0164] Finally, it should be noted that those skilled in the art will readily identify other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The present invention is not limited to the precise structure described above and illustrated in the accompanying drawings, and various modifications and variations may be made without departing from the scope thereof. The scope of the present invention is limited solely by the appended claims.

Claims

1. A battery module testing device, characterized in that: include: A box body (100) having a receiving cavity, wherein the receiving cavity is used to place the battery module (600); A voltage regulating component (200), the voltage regulating component (200) being used to be electrically connected to different battery modules (600); A protective member is provided between the voltage regulating member (200) and the battery module (600); the protective member is configured to be disconnected when the voltage regulating member (200) and the two battery modules (600) form a loop.

2. The battery module testing device according to claim 1, characterized in that: It also includes a conductor detection component; the conductor detection component is arranged on the box (100), and the first connection end and the second connection end of the conductor detection component are respectively used to connect to the input end and the output end of the voltage adjustment component (200); When the battery module (600) thermally runs away and the battery cell explosion-proof valve of the battery module (600) ejects ejected matter, the conductor detection component is in a conducting state, so that the voltage adjustment component (200) and the conductor detection component form a loop.

3. The battery module testing device according to claim 2, characterized in that: It also includes a cover body (300); the box body (100) has an opening communicating with the accommodating cavity, and the cover body (300) is arranged to cover the opening; A plurality of grooves (110) are provided on one side of the box body (100) close to the opening; the groove depth direction of the grooves (110) is parallel to a first direction perpendicular to the height direction of the box body (100); Along the height direction of the box body (100), a plurality of the grooves (110) are arranged at intervals; The cover body (300) is slidably disposed in the groove (110).

4. The battery module testing device according to claim 3, characterized in that: The conductor detection member further includes a first conductor, a second conductor and a detection portion; Along the height direction of the box body (100), the first conductor and the second conductor are arranged between the battery module (600) and the cover body (300); Along a direction perpendicular to the height of the box (100), the connection end of the first conductor forms the first connection end; the connection end of the second conductor forms the second connection end; There is a gap between the first conductor and the second conductor; The battery cell explosion-proof valve of the battery module (600) is arranged close to the cover body (300); along the height direction of the box body (100), the battery cell explosion-proof valve and the gap are arranged relative to each other; When the battery module (600) experiences thermal runaway and the ejected material from the explosion-proof valve of the battery module (600) passes through the gap, the conductor detection component is in a conducting state, and the first conductor, the second conductor, the detection unit, and the voltage adjustment component (200) are sequentially connected in series to form a loop.

5. The battery module testing device according to any one of claims 3-4, characterized in that: It also includes a pressing piece, which is arranged on a side of the cover (300) facing away from the box body (100); The pressing member comprises at least two first pressing portions (400) and at least two second pressing portions (410), wherein the first pressing portions (400) extend along a first direction perpendicular to the height direction of the box body (100), and the at least two first pressing portions (400) are spaced apart along a second direction perpendicular to the height direction of the box body (100); The second pressing portion (410) extends perpendicular to the second direction; at least two second pressing portions (410) are spaced apart along the first direction.

6. The battery module testing device according to any one of claims 1 to 4, characterized in that: The box body (100) comprises side panels and a bottom panel, the side panels are connected to the bottom panel and the side panels are arranged along the circumference of the bottom panel; the side panels and the bottom panel surround and form the accommodating cavity; The bottom plate is formed with a bottom plate receiving cavity, and the bottom plate receiving cavity is used to receive the cooling liquid; The liquid inlet and the liquid outlet of the bottom plate accommodating cavity are respectively provided with temperature detection components.

7. The battery module testing device according to claim 6, characterized in that: It also includes a liquid inlet and outlet structure and a liquid supply component, wherein the liquid inlet and outlet structure connects the liquid supply component and the bottom plate accommodating cavity; The liquid supply member is used to supply cooling liquid to the bottom plate accommodating cavity; An opening (120) is provided on the box body (100), and a portion of the liquid inlet and outlet structure passes through the opening (120).

8. The battery module testing device according to claim 6, characterized in that: It also includes a pricking needle, which is arranged outside the box (100); An opening (120) is provided on the box body (100), and the opening direction of the opening (120) is parallel to the moving direction of the needle; the opening (120) is used for the needle to pass through.

9. The battery module testing device according to any one of claims 1 to 4, characterized in that: It also includes a first clamping arm (500), a second clamping arm (510) and a driving member; the driving member is configured to provide a clamping force to the first clamping arm (500) and / or the second clamping arm (510); Along a height direction perpendicular to the box body (100), a clamping space for accommodating a battery module (600) is formed between the first clamping arm (500) and the second clamping arm (510).

10. The battery module testing device according to any one of claims 1 to 4, characterized in that: It also includes a pressure relief piece, a pressure relief port is provided on the box body (100), and the pressure relief piece is provided at the pressure relief port.

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