Testing device

Abstract

The utility model relates to a testing device. The testing device comprises a testing base and a bearing table. The test base is provided with a test cavity with a mounting port; the bearing table is used for bearing the single batteries and can be moved into the test cavity through the mounting opening; wherein the test base comprises a plurality of bearing installation positions located in the test cavity, and the bearing table is constructed to be detachably arranged at different bearing installation positions. When a thermal runaway test is carried out on the single battery through the test device, different bearing installation positions of the bearing platform in the test cavity can be adjusted according to the type, shape and size of the single battery to be tested. Therefore, when to-be-tested single batteries of different types, shapes and sizes are measured, the pressure relief mechanisms on the single batteries can be kept consistent relative to the positions in the test cavity, and errors caused to test results when the different to-be-tested single batteries are subjected to pressure relief at different positions in the test cavity are reduced.

Description

Technical Field

[0001] This application relates to the field of testing technology, and in particular to testing apparatus. Background Technology

[0002] Battery cells may experience thermal runaway under high or abnormal temperature conditions, generating large amounts of gas and heat inside the battery, leading to excessive internal pressure. Related technologies typically involve placing battery cells in testing equipment capable of generating specific temperature and pressure environments to induce thermal runaway and conduct tests. The results of these tests and analyses are then used to assess the thermal runaway risk of the battery cells, thereby assisting in the design of battery pressure relief mechanisms. However, the accuracy of the testing equipment and analysis results in these technologies is unsatisfactory. Utility Model Content

[0003] In view of the above problems, this application provides a testing device that can effectively improve the consistency of test conditions during the thermal runaway test of battery cells, thereby improving the accuracy of thermal runaway test results.

[0004] In a first aspect, this application provides a testing apparatus, which includes a testing base and a support platform. The testing base is configured with a testing cavity having an installation port; the support platform is used to support a single battery cell and can be moved into the testing cavity through the installation port; wherein, the testing base includes multiple support mounting positions located within the testing cavity, and the support platform is configured to be detachably mounted at different support mounting positions.

[0005] When conducting thermal runaway tests on individual battery cells using the testing apparatus provided in this embodiment, the support platform is moved into the test chamber through the mounting port, and the battery cell under test is placed on the support platform. Simultaneously, the support platform is adjusted to different mounting positions within the test chamber according to the type, shape, and size of the battery cell under test. This ensures that when measuring battery cells of different types, shapes, and sizes, the pressure relief mechanism on the battery cell remains relatively consistent relative to its position within the test chamber. This reduces errors in the test results caused by pressure relief at different positions of different battery cells within the test chamber, resulting in higher accuracy of the final measurement results.

[0006] In some embodiments, the support platform is constructed with a support surface for supporting individual battery cells; the support platform is located at different support installation positions, and the planes containing the support surfaces are parallel to each other and spaced apart in a first direction; the first direction is perpendicular to the installation direction in which the support platform moves into the test chamber through the installation port. When the support platform is located at different support installation positions, the planes containing the support surfaces are parallel to each other and spaced apart in the first direction, thereby allowing battery cells of different types, shapes, and sizes to adjust the position of the support surface within the support chamber in a timely manner according to their own size and the position of the pressure relief mechanism, thus effectively ensuring the accuracy of the test results.

[0007] In some embodiments, the test chamber wall is provided with multiple sets of mounting structures, each set of mounting structures including at least two snap-fit ​​parts; the support platform is located at different load-bearing mounting positions and snaps into the snap-fit ​​parts of the corresponding set of mounting structures. By setting each set of mounting structures to have at least two snap-fit ​​parts, the support platform can be snapped into different load-bearing mounting positions through different sets of mounting structures, which facilitates the installation of the support platform relative to the test chamber.

[0008] In some embodiments, multiple latching portions are arranged circumferentially spaced along the test cavity. By arranging multiple latching portions circumferentially spaced along the test cavity, the carrier stage can be latched by multiple latching portions at different positions, thereby making the installation position of the carrier stage relative to the test cavity adjustable.

[0009] In some embodiments, the snap-fit ​​portion is constructed as a protrusion extending from the cavity wall of the test chamber. By constructing the snap-fit ​​portion as a protrusion extending from the cavity wall of the test chamber, the structure of the snap-fit ​​portion is relatively simple and its fabrication is relatively convenient.

[0010] In some embodiments, the support platform includes a support body and support columns. The support body has a support surface for supporting individual battery cells; the support columns are disposed on the side of the support body opposite to the support surface; the side of the support columns away from the support body abuts against the cavity wall of the test chamber. By providing support columns on the support body, the height of the support body can be raised by the support columns, thereby adjusting the position and height of the support body relative to the test chamber. When support columns of different heights are selected, the support installation position of the support body can be adjusted by using support columns of different heights. At the same time, since the side of the support columns away from the support body abuts against the cavity wall of the test chamber, the support columns can support the support body in the test chamber, making the support method relatively simple.

[0011] In some embodiments, the support column and the carrier body are detachably connected. This detachable connection facilitates assembly. Furthermore, using support columns of different heights connected to the carrier body allows for adjustments to the position and height of the carrier body relative to the test chamber, making the adjustment process convenient. Additionally, if either the support column or the carrier body is damaged and needs replacement, they can be easily detached and replaced.

[0012] In some embodiments, the support column is constructed as a telescopic rod that can extend and retract along its own length. By constructing the support column as a telescopic rod that can extend and retract along its own length, when it is necessary to adjust the height of the support body according to the type, shape, and size of the battery cell under test, the user can directly adjust the length of the telescopic rod itself. Moreover, this adjustment process can be completed outside the test chamber. After the adjustment is completed, the support platform carrying the battery cell is moved into the test chamber from the mounting port. The entire adjustment process is not only convenient but also easy for the user to observe, and the adjustment accuracy is also high.

[0013] In some embodiments, multiple support columns are used, spaced apart from each other. By using multiple support columns, the weight of the carrier body and the battery cell under test can be supported by multiple support columns, resulting in better stability of the carrier body and the battery cell under test. Furthermore, by setting multiple heights for the support columns, the levelness of the bearing surface of the carrier body can be adjusted by varying the height of different support columns.

[0014] In some embodiments, the support platform includes a support body and a lifting platform. The support body has a support surface for supporting individual battery cells; the lifting platform is located on the side of the support body opposite to the support surface; the side of the lifting platform away from the support body abuts against the cavity wall of the test chamber. By providing the lifting platform, the position and height of the support body relative to the test chamber can be adjusted by adjusting the height of the lifting platform itself, which is simple, convenient, and has high adjustment accuracy. Furthermore, since the side of the lifting platform away from the support body abuts against the cavity wall of the test chamber, the support body can be supported within the test chamber by the lifting platform, making the support method relatively simple.

[0015] In some embodiments, a scissor lift mechanism is provided on the side of the lifting platform away from the support body. By providing a scissor lift mechanism on the side of the lifting platform away from the support body, the position and height of the support body relative to the test chamber can be adjusted by adjusting the height of the scissor lift mechanism itself, which is simple and convenient. Moreover, by connecting the drive end of the scissor lift mechanism to the control system of the testing device, the user can remotely adjust the height of the support body through the control system when the battery cell to be tested is placed on the support surface of the support body and moved into the test chamber, thereby achieving high adjustment accuracy.

[0016] In some embodiments, the support platform is constructed with a clearance through-hole for the pressure relief mechanism of the battery cell. By providing a clearance through-hole for the pressure relief mechanism of the battery cell on the support platform, during the thermal runaway test, when the battery cell is depressurized through the pressure relief mechanism, the gas generated inside the battery cell can be discharged from the pressure relief mechanism and flow into the test chamber through the clearance through-hole. This makes the pressure relief process smoother and safer, and effectively prevents the pressure relief mechanism from failing to open due to blockage.

[0017] In some embodiments, the vent hole is a circular hole, and its diameter d1 satisfies the condition: 10mm ≤ d1 ≤ 200mm. By setting the vent hole as a circular hole, its machining is facilitated, and it can be adapted to the pressure relief mechanism of a dome-type pressure relief valve. By limiting the diameter d1 of the vent hole to a range greater than or equal to 10mm and less than or equal to 200mm, the size of the vent hole is made more reasonable. This effectively meets the space requirements of the pressure relief mechanism on the battery cell, while also preventing the support body from becoming too large, which would result in lower strength and easier deformation, thus negatively impacting the stability of the supported battery cell during testing.

[0018] In some embodiments, the clearance hole is a rectangular hole, and the minimum dimension d2 of the clearance hole along the direction of movement of the support platform into the test chamber satisfies the condition: 10mm ≤ d2 ≤ 200mm; the minimum dimension d3 of the clearance hole along the direction perpendicular to the direction of movement of the support platform into the test chamber satisfies the condition: 5mm ≤ d3 ≤ 100mm. By setting the clearance hole as a rectangular hole, it is possible to adapt to the pressure relief mechanism of battery cells with different shapes. For example, the pressure relief mechanism of a slot-type pressure relief channel. By setting the minimum dimension d2 of the clearance hole along the direction of movement of the support platform into the test chamber to be greater than or equal to 10 mm and less than or equal to 200 mm, and setting the minimum dimension d3 of the rectangular hole along the direction perpendicular to the direction of movement of the support platform into the test chamber to be greater than or equal to 5 mm and less than or equal to 100 mm, the size of the clearance hole is made more reasonable. This effectively meets the space required for the pressure relief mechanism on the battery cell, and also avoids the situation where the support body itself is weak and prone to deformation when the clearance hole is too large, which is not conducive to the stability of the battery cell under its support during the test.

[0019] In some embodiments, a through-hole is constructed on the support platform, with the through-hole and the vent hole spaced apart. The through-hole allows for pressure exchange between the support platform and the area below it. This ensures that during thermal runaway testing, when the pressure relief mechanism at the vent hole operates, a large amount of gas flows from the vent hole into the area below the support platform. The gas is then quickly conducted through the through-hole to the upper and lower sides of the support platform, resulting in a more balanced pressure within the entire test chamber and a safer testing process.

[0020] In some embodiments, the testing apparatus further includes a filler; the filler is movable into the testing chamber through the mounting port and is detachably installed within the testing chamber; the filler is spaced apart from the support platform. By filling the testing chamber with the filler, the space occupied by the filler within the testing chamber is reduced, thereby decreasing the effective testing volume within the testing chamber. This makes it easier to detect the amount of gas leaked and the temperature change during the depressurization process when small-sized battery cells undergo thermal runaway testing, thus improving the accuracy of the test results. Furthermore, since the filler in this application is detachably installed within the testing chamber, when thermal runaway testing of smaller battery cells is required, the filler is moved into the testing chamber; when thermal runaway testing of larger battery cells is required, the filler is removed from the testing chamber. This allows for flexible adjustment of the effective testing area within the testing chamber based on the type and size of the battery cells, thereby improving the accuracy of the test results. It also further improves the testing compatibility for battery cells of different sizes, reduces the types and number of testing devices, lowers testing costs, and offers good economic benefits.

[0021] In some embodiments, the filler is slidably connected to the wall of the test chamber. By configuring the filler to be slidably connected to the wall of the test chamber, it is convenient to install and remove the filler relative to the test chamber, thereby enabling quick adjustment of whether to insert the filler according to different battery cells under test, and shortening the test preparation time.

[0022] In some embodiments, the filler is configured to be at least partially positioned around the axis of the mounting port. By configuring the filler to be at least partially positioned around the axis of the mounting port, the filler can more easily conform to the cavity wall of the test chamber when it slides into the test chamber.

[0023] In some embodiments, the cross-section of the filler along the radial plane of the mounting opening is fan-shaped. By setting the cross-section of the filler along the radial plane of the mounting opening to a fan shape, the filler can be first processed into a cylindrical shape, and then a portion of the cylinder can be cut off to form the filler. This makes the processing and preparation of the filler more convenient, the volume is easier to calculate, and its shape is more compatible with the shape of the test cavity, thus having less impact on the test environment.

[0024] In some embodiments, the cross-section of the filler along the radial plane of the mounting opening is an annular structure; the annular structure has a receiving cavity that can accommodate the support platform. By making the cross-section of the filler along the radial plane of the mounting opening an annular structure and providing a receiving cavity within this annular structure, the support platform can be accommodated within the receiving cavity. This method ensures that the battery cell under test carried on the support platform remains a roughly cylindrical cavity during thermal runaway testing, thus allowing the energy generated by the explosion of the battery cell under test during thermal runaway to be evenly diffused, resulting in higher accuracy of the test results.

[0025] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0027] Figure 1 The electrical device provided in some embodiments of this application is a structural schematic diagram of a vehicle.

[0028] Figure 2 for Figure 1 The diagram shows the exploded structure of the battery.

[0029] Figure 3 for Figure 2 The diagram shows the exploded structure of a single battery cell.

[0030] Figure 4 A schematic diagram of a test apparatus provided for some embodiments of this application.

[0031] Figure 5 for Figure 4 The front view of the test apparatus shown.

[0032] Figure 6 This is a schematic diagram of a support platform in a test apparatus provided in some embodiments of this application.

[0033] Figure 7 for Figure 6 The image shows a bottom view of the support platform.

[0034] Figure 8 This is a schematic diagram of a support platform in a test apparatus provided in other embodiments of this application.

[0035] Figure 9 This is a schematic diagram of a test apparatus equipped with a filler element, provided for some embodiments of this application.

[0036] Figure 10 for Figure 9 The sectional view shown at point AA.

[0037] Figure 11 for Figure 10 A schematic diagram of the filler in the test apparatus shown.

[0038] Figure 12 This is a schematic diagram of a test apparatus equipped with a filler element, provided for some other embodiments of this application.

[0039] Figure 13 for Figure 12 The sectional view shown at BB.

[0040] Figure 14 for Figure 13 A schematic diagram of the filler in the test apparatus shown.

[0041] The reference numerals in the detailed embodiments are as follows:

[0042] 10000 - Vehicles;

[0043] 1000-Test device; 100-Test base; 110-Test chamber; 111-Mounting port; 112-Snap-fit ​​part; 120-Cover; 200-Support platform; 210-Support body; 211-Support surface; 212-Void hole; 213-Connecting hole; 220-Support column; 300-Filling material; 310-Partial cylindrical structure; 320-Annular structure; 321-Receiving cavity;

[0044] 2000 - Battery; 2100 - Housing; 2110 - First part; 2120 - Second part; 2200 - Battery cell; 2210 - End cap; 2211 - Electrode terminal; 2220 - Housing; 2230 - Cell;

[0045] 3000-Controller;

[0046] 4000-motor. Detailed Implementation

[0047] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0049] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0050] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0051] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0052] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0053] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0054] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0055] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0056] When developing and manufacturing power batteries, thermal runaway testing of individual battery cells is necessary. In related technologies, battery cells are typically placed in a sealed test chamber for thermal runaway testing. However, due to differences in type, shape, and size among different battery cells, the positions of their pressure relief mechanisms also vary, leading to differences in the arrangement of these mechanisms relative to the test chamber. When the pressure relief mechanism is located in different positions within the test chamber, the pressure relief position of the battery cell changes during thermal runaway, thus affecting the numerical values ​​of temperature and pressure changes during the pressure relief process, ultimately resulting in lower accuracy of the test results.

[0057] Based on the above considerations, in order to solve the problem of low accuracy of test results when battery cells undergo thermal runaway testing, this application provides a testing device that uses battery cells of different types, shapes and sizes to adjust the mounting position of the support platform in the test chamber, thereby making the arrangement position of the pressure relief mechanism of the battery cells more similar, reducing the difference in temperature and pressure changes caused by different pressure relief positions, and thus improving the accuracy of the test results.

[0058] The battery cells tested using this testing device are used to prepare power batteries, and the resulting energy storage system can be used, but is not limited to, energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. The energy storage device can store electrical energy as needed and output it at appropriate times. For example, the energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage.

[0059] Power batteries made from battery cells tested using this testing device can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft. Specifically, these electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., while spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0060] For ease of explanation, the following embodiments will be described using a vehicle 10000 as an example of an electrical device according to an embodiment of this application.

[0061] Please refer to Figure 1 , Figure 1The diagram illustrates the structure of a vehicle 10000, an electrical device provided in some embodiments of this application. The vehicle 10000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery 2000 is internally installed in the vehicle 10000, and the battery 2000 can be located at the bottom, front, or rear of the vehicle 10000. The battery 2000 can be used to power the vehicle 10000; for example, the battery 2000 can serve as the operating power source for the vehicle 10000. The vehicle 10000 may also include a controller 3000 and a motor 4000. The controller 3000 controls the battery 2000 to supply power to the motor 4000, for example, to meet the power needs of the vehicle 10000 during startup, navigation, and driving.

[0062] In some embodiments of this application, the battery 2000 can not only serve as the operating power source for the vehicle 10000, but also as the driving power source for the vehicle 10000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 10000.

[0063] Please refer to Figure 2 , Figure 2 It shows Figure 1 The diagram shows an exploded view of the battery 2000. The battery 2000 includes a housing 2100 and individual battery cells 2200, with the individual battery cells 2200 housed within the housing 2100. The housing 2100 provides space for the individual battery cells 2200, and can have various structures. In some embodiments, the housing 2100 may include a first portion 2110 and a second portion 2120, which overlap each other, together defining a space for accommodating the individual battery cells 2200.

[0064] In battery 2000, there can be multiple battery cells 2200. These multiple battery cells 2200 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 2200 are connected in both series and parallel. Multiple battery cells 2200 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 2200 is housed within housing 2100. Alternatively, battery 2000 can also consist of multiple battery cells 2200 first connected in series, parallel, or in a mixed configuration to form a battery module, and then multiple battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is also housed within housing 2100. Battery 2000 may also include other structures; for example, it may include a busbar component for electrical connection between multiple battery cells 2200.

[0065] Each battery cell 2200 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 2200 can be cylindrical, flat, cuboid, or other shapes.

[0066] Please see Figure 3 , Figure 3 It shows Figure 2 The diagram shows an exploded view of battery cell 2200. Battery cell 2200 refers to the smallest unit that makes up battery 2000. Figure 3 The battery cell 2200 includes an end cap 2210, a housing 2220, a cell 2230, and other functional components.

[0067] End cap 2210 refers to a component that covers the opening of housing 2220 to isolate the internal environment of battery cell 2200 from the external environment. Not limited to this, the shape of end cap 2210 may be adapted to the shape of housing 2220 to fit the housing 2220. Functional components such as electrode terminals 2211 may be provided on end cap 2210. Electrode terminals 2211 can be used for electrical connection with battery cell 2230 to output or input electrical energy to battery cell 2200. In some embodiments, end cap 2210 may also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 2200 reaches a threshold.

[0068] The housing 2220 is an assembly used to cooperate with the end cap 2210 to form the internal environment of the battery cell 2200, wherein the formed internal environment can accommodate the battery cell 2230, electrolyte, and other components. The housing 2220 and the end cap 2210 can be independent components. An opening can be provided in the housing 2220, and the end cap 2210 closes the opening to form the internal environment of the battery cell 2200. The shape of the housing 2220 can be determined according to the specific shape and size of the battery cell 2230.

[0069] Cell 2230 is the component in battery cell 2200 where the electrochemical reaction occurs. The casing 2220 may contain one or more cells 2230. Cell 2230 is mainly formed by thermally bonding a positive electrode sheet, a negative electrode sheet, and a separator between the positive and negative electrode sheets to form a composite strip, and then stacking the composite strip. The portions of the positive and negative electrode sheets containing active material constitute the main body of cell 2230, while the portions of the positive and negative electrode sheets without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body or at opposite ends of the main body. During the charging and discharging process of battery 2000, the positive and negative active materials react with the electrolyte, and the tabs connect to electrode terminals 2211 to form a current loop.

[0070] Please see Figure 4 and Figure 5 , Figure 4 A schematic diagram of a test apparatus 1000 provided in some embodiments of this application is shown. Figure 5 It shows Figure 4 The front view of the test device 1000 shown.

[0071] An embodiment of this application provides a testing apparatus 1000, which includes a testing base 100 and a support platform 200. The testing base 100 is configured with a testing cavity 110 having a mounting port 111; the support platform 200 is used to support a battery cell 2200, and the support platform 200 can be moved into the testing cavity 110 through the mounting port 111; wherein, the testing base 100 includes multiple support mounting positions located within the testing cavity 110, and the support platform 200 is configured to be detachably mounted at different support mounting positions.

[0072] The test base 100 is generally made of high-strength, corrosion-resistant and good toughness materials, such as steel, aluminum alloy, titanium alloy or some special metals and alloys, so that the test base 100 itself is not easily cracked or corroded during the thermal runaway test of the battery cell 2200.

[0073] The test chamber 110 is generally cylindrical, allowing the energy generated by the explosion of the battery cell 2200 under test during thermal runaway to diffuse uniformly. Specifically, the energy generated by the explosion of the battery cell 2200 propagates and diffuses at the same rate in all directions, that is, it is released uniformly from the explosion center outwards, thus forming an approximately spherical diffusion area. However, the manufacturing cost of a spherical chamber is higher than that of a cylindrical chamber. Considering economic efficiency, manufacturing the test chamber 110 as a cylindrical chamber not only reduces the cost but also improves the accuracy of the experimental results. The mounting port 111 of the test chamber 110 can be circular, facilitating the insertion and removal of the support platform 200 and the battery cell 2200 under test.

[0074] Pressure sensors and temperature sensors can be installed on the walls of the test chamber 110 to detect pressure and temperature changes in the battery cell 2200 during the thermal runaway test.

[0075] The support platform 200 is generally made of high-strength materials, such as steel, aluminum alloy, titanium alloy, or some special metals and alloys. Furthermore, the support platform 200 can be provided with connecting holes 213, allowing the air pressure on the side of the support platform 200 supporting the battery cell 2200 to communicate with the side facing away from the battery cell 2200, ensuring pressure balance throughout the entire test chamber 110.

[0076] When conducting a thermal runaway test on a battery cell 2200 using the testing apparatus 1000 provided in this application embodiment, the support platform 200 is moved into the test chamber 110 through the mounting port 111, and the battery cell 2200 to be tested is placed on the support platform 200. Simultaneously, the support platform 200 is adjusted to different support and mounting positions within the test chamber 110 according to the type, shape, and size of the battery cell 2200 to be tested. This ensures that when measuring battery cells 2200 of different types, shapes, and sizes, the pressure relief mechanism on the battery cell 2200 remains relatively consistent relative to its position within the test chamber 110, reducing errors in the test results caused by pressure relief at different positions of different battery cells 2200 within the test chamber 110, resulting in higher accuracy of the final measured test results.

[0077] The structure of the test apparatus 1000 is described in detail below. Please refer to [link / reference]. Figures 6-14 , Figure 6 A schematic diagram of the support platform 200 in the test apparatus 1000 provided in some embodiments of this application is shown. Figure 7 It shows Figure 6 The bottom view of the support platform 200 shown. Figure 8 A schematic diagram of the support platform 200 in the test apparatus 1000 provided in other embodiments of this application is shown. Figure 9 A schematic diagram of a test apparatus 1000 provided in some embodiments of this application, equipped with a filler 300, is shown. Figure 10 It shows Figure 9 The sectional view shown at point AA. Figure 11 It shows Figure 10 A schematic diagram of the filler 300 in the test apparatus 1000 shown. Figure 12 A schematic diagram of a test apparatus 1000 provided in other embodiments of this application, equipped with a filler 300, is shown. Figure 13 It shows Figure 12 The sectional view shown at BB. Figure 14 It shows Figure 13 A schematic diagram of the filler 300 in the test apparatus 1000 shown.

[0078] In some embodiments, the support platform 200 is configured with a support surface 211 for supporting the battery cell 2200; the support platform 200 is located at different support mounting positions, and the planes containing the support surfaces 211 are parallel to each other and spaced apart from each other in a first direction; the first direction is perpendicular to the mounting direction in which the support platform 200 moves into the test chamber 110 through the mounting port 111. Specifically, the mounting direction in which the mounting port 111 moves into the test chamber 110 can be... Figure 4 The direction of xx' in the diagram; the first direction is the direction with... Figure 4 The direction of xx' is perpendicular to any direction.

[0079] A support surface 211 is constructed on the support platform 200, which is used to support and lift the battery cell 2230 under test within the test chamber 110. The first direction can be... Figure 4 and Figure 5 In the zz' direction, when the support platform 200 is located in different support installation positions, the support surface 211 can be at different height positions in the zz' direction, thereby effectively adjusting the support height and support position of the battery cell 2200 under test.

[0080] When the support platform 200 is located in different support installation positions, the planes on which the support surfaces 211 of the support platform 200 are located are parallel to each other and spaced apart in the first direction. This allows battery cells 2200 of different types, shapes and sizes to adjust the position of the support surface 211 in the support cavity in a timely manner according to their own size and the position of the pressure relief mechanism, thereby effectively ensuring the accuracy of the test results.

[0081] Please see Figure 4 and Figure 5 In some embodiments, the test chamber 110 has multiple sets of mounting structures on its cavity wall, each set of mounting structures including at least two snap-fit ​​parts 112; located at different bearing mounting positions, the bearing platform 200 snaps into the snap-fit ​​parts 112 of the corresponding set of mounting structures.

[0082] The number of mounting structures is not limited and can be adaptively adjusted according to the size of the test chamber 110 and the number of different types of battery cells 2200 being tested. Each mounting structure may include two snap-fit ​​parts 112, and each snap-fit ​​part 112 may include multiple snap-fit ​​sub-parts spaced apart along the axial extension direction of the test chamber 110, thereby making the snap-fit ​​to the support platform 200 more secure. Specifically, the axial extension direction of the test chamber 110 may be... Figure 4 The direction of xx' in the middle.

[0083] By setting each set of mounting structures to at least two snap-fit ​​parts 112, the support platform 200 can be snapped into different support installation positions through different sets of mounting structures, which facilitates the installation of the support platform 200.

[0084] Please see Figure 4 and Figure 5 In some embodiments, a plurality of snap-fit ​​portions 112 are arranged at circumferential intervals along the test cavity 110.

[0085] Multiple snap-fit ​​portions 112 can be arranged at equal intervals along the circumference of the test cavity 110, that is, the spacing between adjacent snap-fit ​​portions 112 is equal. Of course, multiple snap-fit ​​portions 112 can also be arranged at unequal intervals along the circumference of the test cavity 110, that is, the spacing between adjacent snap-fit ​​portions 112 is not equal.

[0086] By arranging multiple snap-fit ​​parts 112 at intervals along the circumference of the test cavity 110, the carrier stage 200 can be snapped into place by multiple snap-fit ​​parts 112 at different positions, thereby making the installation position of the carrier stage 200 relative to the test cavity 110 adjustable.

[0087] Please see Figure 4 and Figure 5 In some embodiments, the snap-fit ​​portion 112 is configured as a protrusion protruding from the cavity wall of the test cavity 110.

[0088] The bump can be integrally formed with the cavity wall of the test cavity 110 during the fabrication of the test cavity 110. Alternatively, the bump can be fixedly connected to the cavity wall by welding or bonding after the test cavity 110 is fabricated.

[0089] By constructing the snap-fit ​​portion 112 as a protrusion protruding from the cavity wall of the test cavity 110, the structure of the snap-fit ​​portion 112 is relatively simple and the manufacturing process is relatively convenient.

[0090] Please see Figures 6-8 In some embodiments, the support platform 200 includes a support body 210 and a support column 220. The support body 210 is configured with a support surface 211 for supporting the battery cell 2200; the support column 220 is disposed on the side of the support body 210 away from the support surface 211; the side of the support column 220 away from the support body 210 abuts against the cavity wall of the test chamber 110.

[0091] The support body 210 can be made of a high-strength, impact-resistant, and corrosion-resistant material, so that it can still provide good support for the battery cell 2200 during thermal runaway testing when pressure is released or electrolyte overflow occurs. For example, it can be made of steel, aluminum alloy, titanium alloy, or some special metals and alloys.

[0092] The support column 220 can be made of a material with good support stability and is not easily deformed. This allows it to better support the carrier body 210, making it less likely for the battery cell 2200 supported on the carrier body 210 to slip during testing.

[0093] By providing support columns 220 on the support body 210, the height of the support body 210 can be raised, thereby adjusting the position and height of the support body 210 relative to the test chamber 110. When support columns 220 of different heights are used, the mounting position of the support body 210 can be adjusted. Furthermore, since the side of the support column 220 away from the support body 210 abuts against the wall of the test chamber 110, the support column 220 can effectively support the support body 210 within the test chamber 110, making the support method relatively simple.

[0094] In some embodiments, the support column 220 is detachably connected to the support body 210.

[0095] The support column 220 can be connected to the bearing body 210 via a threaded connection, thus facilitating disassembly. Alternatively, the support column 220 and the bearing body 210 can be connected detachably using mating grooves and protrusions.

[0096] By detachably connecting the support column 220 and the carrier body 210, their assembly becomes more convenient. Furthermore, when support columns 220 of different heights are connected to the carrier body 210, the position and height of the carrier body 210 relative to the test chamber 110 can be changed, making adjustment easier. Additionally, if either the support column 220 or the carrier body 210 is damaged and needs replacement, they can be easily detached and replaced.

[0097] In some embodiments, the support column 220 is configured as a telescopic rod that is telescopic along its own length.

[0098] Telescopic poles can be assembled from sliding rods that can slide against each other. The height of the entire telescopic pole can be adjusted by sliding these rods together.

[0099] By constructing the support column 220 as a telescopic rod that can extend and retract along its own length, when it is necessary to adjust the height of the carrier body 210 according to the type, shape, and size of the battery cell 2200 under test, the user can directly adjust the length of the telescopic rod itself. Moreover, this adjustment process can be completed outside the test chamber 110. After the adjustment is completed, the carrier platform 200 carrying the battery cell 2200 is moved into the test chamber 110 from the mounting port 111. The entire adjustment process is not only more convenient, but also easier for the user to observe, and the adjustment accuracy is also higher.

[0100] Please see Figures 6-8 In some embodiments, there are multiple support columns 220, which are spaced apart from each other.

[0101] The number of support columns 220 can be as follows: Figures 6-8 The four shown can also be three, five, six, etc., without any special limitation. They can also be added or reduced according to the size of the supporting body 210.

[0102] By setting the number of support columns 220 to multiple, the weight of the carrier body 210 and the battery cell 2200 under test can be supported by multiple support columns 220, resulting in better stability of the carrier body 210 and the battery cell 2200 under test. At the same time, by setting the height of the support columns 220 to multiple, the levelness of the bearing surface 211 of the carrier body 210 can be adjusted by adjusting the height of different support columns 220.

[0103] In some embodiments, the support platform 200 includes a support body 210 and a lifting platform. The support body 210 is configured with a support surface 211 for supporting the battery cell 2200; the lifting platform is disposed on the side of the support body 210 away from the support surface 211; the side of the lifting platform away from the support body 210 abuts against the cavity wall of the test chamber 110.

[0104] The lifting platform can be connected to the control system of the testing device 1000, so that when the battery cell 2200 to be tested is placed on the bearing surface 211 of the bearing body 210 and moved into the testing chamber 110, the user can remotely adjust the height of the bearing body 210 through the control system, thereby achieving high adjustment accuracy.

[0105] By setting up a lifting platform, the position and height of the support body 210 relative to the test chamber 110 can be adjusted by adjusting the height of the lifting platform itself. This is relatively simple and convenient, and the adjustment accuracy is also high. At the same time, since the side of the lifting platform away from the support body 210 abuts against the cavity wall of the test chamber 110, the support body 210 can be supported within the test chamber 110 by the lifting platform, making the support method relatively simple.

[0106] In some embodiments, a scissor lift mechanism is provided on the side of the lifting platform away from the support body 210.

[0107] A scissor lift is a highly efficient and reliable vertical transport adjustment mechanism. It primarily relies on a series of articulated arms arranged in a crisscross pattern, resembling the shape of scissors, hence its name. When power is applied to the scissor lift, these crisscrossing arms extend or retract along the hinge points, ultimately achieving height adjustment of the entire mechanism.

[0108] By setting a scissor lift mechanism on the side of the lifting platform away from the support body 210, the position and height of the support body 210 relative to the test chamber 110 can be adjusted by adjusting the height of the scissor lift mechanism itself, which is relatively simple and convenient. Moreover, by connecting the drive end of the scissor lift mechanism to the control system of the test device 1000, the user can remotely adjust the height of the support body 210 through the control system when the battery cell 2200 to be tested is placed on the support surface 211 of the support body 210 and moved into the test chamber 110, thereby achieving high adjustment accuracy.

[0109] Please see Figures 6-8 In some embodiments, the support platform 200 is provided with an air-relief through hole 212 for the pressure relief mechanism of the battery cell 2200.

[0110] The shape of the clearance hole 212 is not limited; it can be circular, rectangular, or any other polygonal shape.

[0111] By setting a vent hole 212 on the bearing platform 200 to allow the pressure relief mechanism of the battery cell 2200 to be positioned, the gas generated inside the battery cell 2200 can be discharged from the pressure relief mechanism and flow into the test chamber 110 through the vent hole 212 when the battery cell 2200 is depressurized through the pressure relief mechanism during the thermal runaway test. This makes the pressure relief process smoother and safer, and can effectively prevent the pressure relief mechanism from being unable to open due to blockage.

[0112] Please see Figure 6 and Figure 7 In some embodiments, the clearance through hole 212 is a circular hole, and the diameter d1 of the clearance through hole 212 satisfies the condition: 10mm≤d1≤200mm.

[0113] The clearance through-hole 212 is designed as a circular hole, which facilitates its machining and allows it to be adapted to the pressure relief mechanism of the dome-type pressure relief valve. By limiting the diameter d1 of the clearance through-hole 212 to a range greater than or equal to 10 mm and less than or equal to 200 mm, the size of the clearance through-hole 212 is made more reasonable. This effectively meets the space required for pressure relief of the pressure relief mechanism on the battery cell 2200, while also preventing the support body 210 from having low strength and being prone to deformation if the clearance through-hole 212 is too large, which would be detrimental to the stability of the battery cell 2200 under its support during testing.

[0114] In one specific embodiment, the diameter d1 of the clearance through hole 212 is 10 mm. In another specific embodiment, the diameter d1 of the clearance through hole 212 is 200 mm. In yet another specific embodiment, the diameter d1 of the clearance through hole 212 is 100 mm.

[0115] Please see Figure 8 In some embodiments, the clearance hole 212 is a rectangular hole, and the minimum dimension d2 of the clearance hole 212 moving into the test chamber 110 along the moving direction of the support platform 200 satisfies the condition: 10mm ≤ d2 ≤ 200mm; specifically, the moving direction of the support platform 200 into the test chamber 110 through the mounting port 111 is... Figure 4 and Figure 8 In the direction of xx'; the minimum dimension d3 of the through hole 212 moving into the test chamber 110 perpendicular to the mounting direction of the support platform 200 satisfies the condition: 5mm≤d3≤100mm. Specifically, the moving direction perpendicular to the support platform 200 into the test chamber 110 is... Figure 4 and Figure 8 The yy' direction in the middle;

[0116] The vent hole 212 is designed as a rectangular hole, which allows it to be adapted to the pressure relief mechanism of battery cells 2200 with different shapes. For example, a pressure relief mechanism with a slotted pressure relief channel.

[0117] By setting the minimum dimension d2 of the clearance hole 212 in the direction of movement from the support platform 200 into the test chamber 110 to a range greater than or equal to 10 mm and less than or equal to 200 mm, and setting the minimum dimension d3 of the clearance hole 212 in the direction perpendicular to the support platform 200 into the test chamber 110 to a range greater than or equal to 5 mm and less than or equal to 100 mm, the size of the clearance hole 212 is made more reasonable. This effectively meets the space required for the pressure relief mechanism on the battery cell 2200, while also avoiding the situation where the support body 210 itself has low strength and is prone to deformation when the clearance hole 212 is too large, which would be detrimental to the stability of the battery cell 2200 during the test.

[0118] In one specific embodiment, the minimum dimension d2 of the clearance through-hole 212 moving into the test chamber 110 along the carrying platform 200 is 10 mm. In another specific embodiment, the minimum dimension d2 of the clearance through-hole 212 moving into the test chamber 110 along the carrying platform 200 is 200 mm. In yet another specific embodiment, the minimum dimension d2 of the clearance through-hole 212 moving into the test chamber 110 along the carrying platform 200 is 100 mm.

[0119] In one specific embodiment, the minimum dimension d3 of the clearance through-hole 212 moving into the test chamber 110 perpendicular to the support platform 200 is 5 mm. In another specific embodiment, the minimum dimension d3 of the clearance through-hole 212 moving into the test chamber 110 perpendicular to the support platform 200 is 100 mm. In yet another specific embodiment, the minimum dimension d3 of the clearance through-hole 212 moving into the test chamber 110 perpendicular to the support platform 200 is 50 mm.

[0120] Please see Figures 6-8 In some embodiments, the support platform 200 is also provided with a through hole 213 that penetrates the support platform 200, and the through hole 213 and the clearance through hole 212 are spaced apart.

[0121] The shape of the connecting hole 213 can be circular, rectangular, or any other shape. There can also be multiple connecting holes 213, which can be evenly arranged around the outer periphery of the clearance hole 212.

[0122] By providing a connecting hole 213, the air pressure above and below the support platform 200 can be connected. This allows for pressure relief during thermal runaway testing. When the pressure relief mechanism at the vent hole 212 performs its depressurization operation, a large amount of gas flows from the vent hole 212 into the lower part of the support platform 200. At this time, the gas is quickly conducted through the connecting hole 213 to both the upper and lower sides of the support platform 200, resulting in a more balanced air pressure within the entire test chamber 110 and a safer testing process.

[0123] Please see Figure 9 , Figure 10 as well as Figure 12 and Figure 13 In some embodiments, the testing apparatus 1000 further includes a filler 300; the filler 300 is movable into the testing chamber 110 along the mounting port 111 and is detachably installed in the testing chamber 110; the filler 300 is spaced apart from the support platform 200.

[0124] The ideal gas law is pV = nRT, where p is the gas pressure in Pascals (Pa) and V is the gas volume in cubic meters (m³). 3 ); n is the amount of substance, in moles (mol); R is the molar gas constant, in joules per mole per kelvin (J / (mol·K)); T is the temperature, in kelvin (K).

[0125] The ideal gas law applies to real gases under high temperature and low pressure conditions. Under these conditions, the behavior of real gases closely approximates the assumptions of an ideal gas; therefore, this equation can be used to calculate and measure various pressure and temperature changes in the battery cell 2200 during thermal runaway. The formula shows that when the gas temperature remains constant, the volume of a given mass of gas is inversely proportional to its pressure. A decrease in volume means an increase in pressure. Because different battery cells 2200 have different types, shapes, and sizes, the amount of gas released through the pressure relief mechanism of the battery cell 2200 varies, resulting in different pressure and temperature changes within the test chamber 110. When the size of the battery cell 2200 is small, if the overall volume of the test chamber 110 is too large, the volume and temperature changes will be small, leading to larger errors in the test results and lower data accuracy.

[0126] As the battery industry develops rapidly, the size of the 2000 battery currently ranges from 5Ah to 800Ah. In the future, the size of the 2000 battery may become larger, which will lead to greater and greater size differences between individual 2200 battery cells. In order to ensure the accuracy of thermal runaway test results for 2200 battery cells of different sizes, a single test chamber 110 volume cannot be compatible with the testing of these 2200 battery cells with large size differences.

[0127] To address this issue, this application reduces the effective test volume within the test chamber 110 by having the filler 300 occupy space within the chamber when it is filled. This makes it easier to detect the pressure change p and temperature change T caused by leaked gas during the depressurization process when a small-sized battery cell 2200 undergoes thermal runaway testing, thereby improving the accuracy of the test results.

[0128] Furthermore, since the filler 300 in this application is detachably installed within the test chamber 110, when thermal runaway testing is required for smaller battery cells 2200, the filler 300 is moved into the test chamber 110; conversely, when thermal runaway testing is required for larger battery cells 2200, the filler 300 is removed from the test chamber 110. This allows for flexible adjustment of the effective test area within the test chamber 110 based on the type and size of the battery cells 2200, thereby improving the accuracy of the test results. It also further enhances the test compatibility for battery cells 2200 of different sizes, reduces the types and number of test devices 1000, lowers testing costs, and offers good economic benefits.

[0129] In some embodiments, the filler 300 is slidably connected to the cavity wall of the test chamber 110.

[0130] The surface of the filler 300 can be machined into a smooth surface with low roughness, thereby facilitating the sliding of the filler 300 against the cavity wall of the test chamber 110.

[0131] By setting the filler 300 to slide on the wall of the test chamber 110, it is convenient to install and remove the filler 300 relative to the test chamber 110. This allows for quick adjustment of whether to insert the filler 300 according to different battery cells 2200 under test, thus shortening the test preparation time.

[0132] Please see Figure 10 and Figure 13 In some embodiments, the filler 300 is configured to be at least partially disposed around the axis of the mounting opening 111; specifically, the axis of the mounting opening 111 is... Figure 10 and Figure 13 The p-line in the diagram.

[0133] The filler 300 can be cylindrical, annular, or partially cylindrical, and there are no special restrictions on this, as long as it does not affect the placement of the support stage 200 and the battery cell 2200 under test when installed in the test chamber 110.

[0134] By configuring the filler 300 to at least partially surround the axis of the mounting port 111, the filler 300 is easy to process, and when the filler 300 slides into the test chamber 110, it can more easily fit against the cavity wall of the test chamber 110 and is less prone to shaking.

[0135] Please see Figures 9-11 In some embodiments, the cross-section of the filler 300 along the radial plane of the mounting opening 111 is fan-shaped; specifically, the radial plane of the mounting opening 111 is... Figure 9 The plane that is parallel to the plane yy'zz'.

[0136] The central angle of the sector of the cross section of the filler 300 along the radial plane of the mounting port 111 can be less than 180°; or the central angle can be 180°, thus forming a semi-circular sector; or the central angle can be greater than 180° and less than 360°. It can be adapted and processed according to the size of the battery cell 2200 to be tested, and no special limitation is made in this regard.

[0137] By setting the cross-section of the filler 300 along the radial plane of the mounting port 111 to a fan shape, the filler 300 can be first processed into a cylinder, and then a part of the cylinder can be cut off to form the filler 300. This makes the processing and preparation of the filler 300 more convenient, and its volume is easier to calculate. Moreover, its shape is more compatible with the shape of the test cavity 110, and its impact on the test environment is also smaller.

[0138] Please see Figures 12-14 In some embodiments, the cross-section of the filler 300 along the radial plane of the mounting opening 111 is an annular structure 320; specifically, the radial plane of the mounting opening 111 is... Figure 12 The plane is parallel to the plane yy'zz'; the annular structure 320 has a receiving cavity 321, which can accommodate the support platform 200.

[0139] By making the cross-section of the filler 300 along the radial plane of the mounting port 111 into an annular structure 320, and setting a receiving cavity 321 within the annular structure 320, the support platform 200 can be housed within the receiving cavity 321. This method ensures that the battery cell 2200 under test carried on the support platform 200 remains a roughly cylindrical cavity during thermal runaway testing, thus allowing the energy generated by the explosion of the battery cell 2200 under test to be evenly diffused during thermal runaway, resulting in higher accuracy of the test results.

[0140] The testing apparatus 1000 provided in this application embodiment includes a testing base 100, a support platform 200, and a filler 300. The testing base 100 is configured with a testing cavity 110 having a mounting port 111; the support platform 200 is used to support a battery cell 2200, and the support platform 200 can be moved into the testing cavity 110 through the mounting port 111. Multiple sets of mounting structures are arranged circumferentially around the wall of the testing cavity 110, each set of mounting structures including at least two snap-fit ​​parts 112; the support platform 200 snaps into the snap-fit ​​parts 112 of the corresponding set of mounting structures at different mounting positions. This allows the support platform 200 to be detachably mounted in different mounting positions by snapping into different sets of mounting structures. Thus, the different mounting positions of the support platform 200 within the testing cavity 110 can be adjusted according to the type, shape, and size of the battery cell 2200 under test. This ensures that when measuring battery cells 2200 of different types, shapes, and sizes, the pressure relief mechanism on the battery cell 2200 remains relatively consistent in position relative to the test chamber 110. This reduces errors in the test results caused by different pressure relief positions of different battery cells 2200 within the test chamber 110, resulting in higher accuracy of the final measurement results. Furthermore, the support platform 200 is constructed with a clearance through-hole 212 to avoid the pressure relief mechanism of the battery cell 2200 and a connecting hole 213 penetrating the support platform 200, with the connecting hole 213 and the clearance through-hole 212 spaced apart. This allows the gas generated inside the battery cell 2200 to be discharged through the pressure relief mechanism and flow into the test chamber 110 through the clearance through-hole 212 during thermal runaway testing. This makes the pressure relief process smoother and safer, and effectively prevents the pressure relief mechanism from failing to open due to blockage. Simultaneously, the air pressure above and below the support platform 200 is connected through the connecting hole 213. This allows the connecting hole 213 to quickly connect the upper and lower sides of the support platform 200 when the pressure relief mechanism is performing a pressure relief operation, resulting in a more balanced air pressure within the entire test chamber 110 and a safer testing process. Furthermore, by detachably installing the filler 300 within the test chamber 110 and spacing it from the support platform 200, the filler 300 can be moved into the test chamber 110 when thermal runaway testing is required for smaller battery cells 2200, and removed from the test chamber 110 when thermal runaway testing is required for larger battery cells 2200. This allows for flexible adjustment of the effective testing area within the test chamber 110 based on the type and size of the battery cells 2200, thereby improving the accuracy of the test results.Furthermore, it further improves the testing compatibility of battery cells 2200 of different sizes, reduces the types and number of testing devices 1000, lowers testing costs, and has good economic benefits.

[0141] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A testing device, characterized in that, The testing apparatus includes: The test base (100) is configured with a test cavity (110) having a mounting port (111); and A support platform (200) is used to support a single battery cell, and the support platform (200) can be moved into the test chamber (110) through the mounting port (111); The test base (100) includes multiple load-bearing mounting positions located within the test cavity (110), and the load-bearing platform (200) is configured to be detachably mounted at different load-bearing mounting positions.

2. The testing apparatus according to claim 1, characterized in that, The support platform (200) is constructed with a support surface (211) for supporting individual battery cells; The support platform (200) is located at different support installation positions, and the planes on which the support surfaces (211) are located are parallel to each other and spaced apart from each other in a first direction; The first direction is perpendicular to the installation direction in which the support platform (200) moves into the test chamber (110) through the mounting port (111).

3. The testing apparatus according to claim 1, characterized in that, The test chamber (110) has multiple sets of mounting structures on its cavity wall, and each set of mounting structures includes at least two snap-fit ​​parts (112). Located at different load-bearing installation positions, the load-bearing platform (200) is snapped into the snap-fit ​​portion (112) of a corresponding set of the installation structures.

4. The testing apparatus according to claim 3, characterized in that, The plurality of said snap-fit ​​portions (112) are arranged at circumferential intervals along the test cavity (110).

5. The testing apparatus according to claim 3, characterized in that, The snap-fit ​​portion (112) is configured as a protrusion protruding from the cavity wall of the test cavity (110).

6. The testing apparatus according to claim 1, characterized in that, The support platform (200) includes: The supporting body (210) is constructed with a supporting surface (211) for supporting individual battery cells; and A support column (220) is disposed on the side of the bearing body (210) opposite to the bearing surface (211); The side of the support column (220) away from the bearing body (210) abuts against the cavity wall of the test chamber (110).

7. The testing apparatus according to claim 6, characterized in that, The support column (220) is detachably connected to the bearing body (210).

8. The testing apparatus according to claim 6, characterized in that, The support column (220) is constructed as a telescopic rod that can extend and retract along its own length.

9. The testing apparatus according to claim 6, characterized in that, The number of the support columns (220) is multiple, and the multiple support columns (220) are spaced apart from each other.

10. The testing apparatus according to claim 1, characterized in that, The support platform (200) includes: The supporting body (210) is constructed with a supporting surface (211) for supporting individual battery cells; and The lifting platform is located on the side of the supporting body (210) away from the supporting surface (211); The side of the lifting platform away from the bearing body (210) abuts against the cavity wall of the test chamber (110).

11. The testing apparatus according to claim 10, characterized in that, The lifting platform is provided with a scissor lift mechanism on the side opposite to the bearing body (210).

12. The testing apparatus according to any one of claims 1-11, characterized in that, The support platform (200) is provided with an air-proof through hole (212) for avoiding the pressure relief mechanism of the battery cell.

13. The testing apparatus according to claim 12, characterized in that, The clearance through hole (212) is a circular hole, and the diameter d1 of the clearance through hole (212) satisfies the following condition: 10mm≤d1≤200mm.

14. The testing apparatus according to claim 12, characterized in that, The clearance hole (212) is a rectangular hole, and the minimum dimension d2 of the clearance hole (212) moving into the test cavity (110) along the support platform (200) satisfies the following condition: 10mm≤d2≤200mm; The minimum dimension d3 of the clearance hole (212) moving into the test cavity (110) perpendicular to the direction of movement of the support platform (200) satisfies the following condition: 5mm≤d3≤100mm.

15. The testing apparatus according to claim 12, characterized in that, The support platform (200) is also provided with a through hole (213) that penetrates the support platform (200), and the through hole (213) is spaced apart from the clearance through hole (212).

16. The testing apparatus according to any one of claims 1-11, characterized in that, The testing apparatus also includes a filler (300); The filler (300) can be moved into the test chamber (110) along the mounting port (111) and is detachably installed in the test chamber (110); The filler (300) is spaced apart from the support platform (200).

17. The testing apparatus according to claim 16, characterized in that, The filler (300) is slidably connected to the cavity wall of the test chamber (110).

18. The testing apparatus according to claim 16, characterized in that, The filler (300) is configured to be at least partially arranged around the axis of the mounting port (111).

19. The testing apparatus according to claim 18, characterized in that, The cross-section of the filler (300) along the radial plane of the mounting port (111) is fan-shaped (310).

20. The testing apparatus according to claim 18, characterized in that, The cross-section of the filler (300) along the radial plane of the mounting port (111) is an annular structure (320); The annular structure (320) is provided with a receiving cavity (321) which can accommodate the support platform (200).

Images