Battery cell burn test positioning device

Abstract

The utility model discloses a kind of electric core combustion test positioning device, it is related to electric core test technical field, including combustion box and the combustion port being opened in the top end of combustion box, further include the polygonal positioning cover being connected in the top end of combustion box, be arranged around combustion port, positioning ring with top end opening is connected in polygonal positioning cover by lifting mechanism, the inner wall of positioning ring is spaced apart and is equipped with multiple L type locating plates along its circumferential direction, L type locating plate can be moved along the radial direction of positioning ring by telescopic mechanism, to clamp or loosen electric core, the bottom plate of L type locating plate is used to support electric core, side plate and the side surface of electric core abut each other.Such, different shape electric core can be effectively positioned, expand device application range, satisfy diversification electric core test demand;Different flame action height, heat flow influence position and other needs in electric core combustion test are adapted by lifting mechanism, improve test accuracy;The side plate of L type locating plate limits electric core side surface, prevent electric core rollover, displacement, ensure test data accuracy and repeatability.

Description

Technical Field

[0001] This utility model relates to the field of battery cell testing technology, and in particular to a battery cell combustion testing positioning device. Background Technology

[0002] Cell combustion testing is an important experimental method for evaluating the safety of energy storage devices such as lithium-ion batteries. It is mainly used to simulate the combustion behavior of batteries under extreme conditions such as thermal runaway, short circuit or mechanical abuse. Combustion testing can directly reflect the fire resistance, thermal diffusion characteristics and degree of combustion hazard of the cell under high temperature, overcharge or external fire source. Traditional combustion testing methods include direct flame burning test, hot box test and electric arc ignition test. The safety level is evaluated by observing the ignition time, combustion duration, flame temperature and whether an explosion occurs.

[0003] However, in the experiment, the existing testing method lacks an effective positioning device for the battery cell. During the thermal runaway stage, the gas generated inside the battery cell causes violent expansion, which may cause the battery cell to roll over or shift, causing it to deviate from the preset combustion point. This non-fixed state will lead to changes in the flame propagation path, uneven heat flow distribution, and even affect the collection and analysis of combustion products, thereby reducing the accuracy and repeatability of the test data.

[0004] Therefore, there is an urgent need for a device that can accurately locate battery cells. Utility Model Content

[0005] To address the technical problems existing in the background art, this utility model proposes a battery cell combustion test positioning device.

[0006] This utility model proposes a battery cell combustion test positioning device, including a combustion chamber and a combustion port opened at the top of the combustion chamber, and a polygonal positioning cover connected to the top of the combustion chamber and arranged around the combustion port. The polygonal positioning cover has a positioning ring with a top opening connected to it through a lifting mechanism. The inner wall of the positioning ring is provided with a plurality of L-shaped positioning plates spaced apart along its circumference. The L-shaped positioning plates can move radially along the positioning ring through a telescopic mechanism to clamp or release the battery cell. The bottom plate of the L-shaped positioning plate is used to support the battery cell, and the side plate abuts against the side of the battery cell.

[0007] In this way, it can be adapted to various shapes of battery cells; the height can be flexibly adjusted: adapting to the different flame heights and heat flow influence positions in battery cell combustion tests, optimizing the testing environment and improving testing accuracy; the side plates of the L-shaped positioning plate limit the side of the battery cell, effectively preventing the battery cell from tipping over and shifting.

[0008] Preferably, the retractable mechanism includes:

[0009] A transmission gear ring is rotatably installed inside the positioning ring. Multiple transmission gears are meshed and driven at intervals along the inner wall of the transmission gear ring in the circumferential direction. Telescopic gear plates are respectively installed on the positioning ring, which correspond one-to-one with the multiple transmission gears and mesh with the corresponding transmission gears. The telescopic gear plates extend in the radial direction of the positioning ring, and the inner end of the telescopic gear plate is fixed to the outer end of the side plate of the L-shaped positioning plate.

[0010] A lever is fixed to the outer wall of the transmission gear ring, with one end passing through the positioning ring and the polygonal positioning cover. The positioning ring and the polygonal positioning cover both have sliding grooves inside for the lever to rotate, and the height of the sliding grooves is adapted to the needs of the positioning ring to drive the lever to move up and down.

[0011] In this way, it can effectively locate battery cells of different shapes such as cubes, cuboids, and discs, expanding the applicability of the device and meeting diverse battery cell testing needs.

[0012] Preferably, the lifting mechanism includes:

[0013] An inverted U-shaped guide frame is fixedly installed between the inner wall of the polygonal positioning cover and the positioning ring;

[0014] The transmission block is slidably installed on the inner bottom of the inverted U-shaped guide frame, and its side is fixedly connected to the outer wall of the positioning ring;

[0015] The threaded rod has one end passing through the transmission block and threadedly connected to the transmission block, and the other end passing through the upper end of the guide frame.

[0016] In this way, the height of the L-shaped positioning plate can be easily adjusted by the cooperation of the threaded rod, transmission block and guide frame, so that the device can adapt to different test scenarios, such as different flame heights and heat flow influence positions, which helps to optimize the test environment and improve the accuracy of cell combustion test.

[0017] Preferably, a slide rod is slidably installed inside the telescopic toothed plate, and the telescopic toothed plate is fixedly connected to the L-shaped positioning plate through the slide rod.

[0018] This ensures a stable connection and smooth sliding.

[0019] Preferably, a turntable is provided at the end of the threaded rod that passes through the upper end of the guide frame.

[0020] This makes it easier for operators to rotate the equipment.

[0021] Preferably, there are four transmission gears and four corresponding L-shaped positioning plates.

[0022] Preferably, the polygonal positioning cover is configured as a mesh or hollow structure.

[0023] This promotes gas circulation, aids in heat dissipation, facilitates observation of the cell combustion status, and reduces the weight of the device.

[0024] Preferably, the polygonal positioning cover is detachably connected to the combustion chamber.

[0025] This makes it easy to disassemble and assemble, and convenient for maintenance.

[0026] In summary, this utility model has the following beneficial effects: By using multiple L-shaped positioning plates that can extend and retract radially along the positioning ring, and by using their bottom plates and side plates to limit the bottom and side surfaces of the battery cell, it can effectively position battery cells of different shapes such as cubes, cuboids, and discs, expanding the applicability of the device and meeting diverse battery cell testing needs; the height of the L-shaped positioning plates can be flexibly adjusted through the lifting mechanism to adapt to the requirements of different flame heights and heat flow influence positions in battery cell combustion tests, optimizing the testing environment and improving testing accuracy; the side plates of the L-shaped positioning plates limit the side surfaces of the battery cell, effectively counteracting the lateral thrust when the battery cell expands due to thermal runaway, preventing the battery cell from tipping over or shifting, ensuring that the battery cell is at the preset combustion point, and ensuring the accuracy and repeatability of test data.

[0027] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] Figure 1 This is a perspective view of the battery cell combustion testing and positioning device according to an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the upper opening structure of the polygonal positioning cover according to an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the internal structure of the polygonal positioning cover according to an embodiment of the present utility model;

[0031] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0032] In the picture:

[0033] 1. Combustion box; 2. Polygonal positioning cover; 3. Lever; 4. Combustion port; 5. Positioning ring; 6. Telescopic toothed plate; 7. Transmission toothed ring; 8. Transmission gear; 9. L-shaped positioning plate; 10. Transmission block; 11. Inverted U-shaped guide frame; 12. Threaded rod; 13. Sliding groove. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] like Figure 1-4 As shown, the battery cell combustion test positioning device proposed in this embodiment includes a combustion chamber 1 and a combustion port 4 opened at the top of the combustion chamber 1. It also includes a polygonal positioning cover 2 connected to the top of the combustion chamber 1 and arranged around the combustion port 4. The polygonal positioning cover 2 has a positioning ring 5 with a top opening connected to it through a lifting mechanism to facilitate the insertion of the battery cell. The inner wall of the positioning ring 5 is provided with a plurality of L-shaped positioning plates 9 at intervals along its circumference. The L-shaped positioning plates 9 can move radially along the positioning ring 5 through a telescopic mechanism to clamp or release the battery cell. The bottom plate of the L-shaped positioning plate 9 is used to support the battery cell, and the side plate abuts against the side of the battery cell.

[0036] Thus, by using multiple L-shaped positioning plates 9 that can extend and retract radially along the positioning ring 5, the bottom and side plates of the plates limit the bottom and sides of the battery cell, effectively positioning battery cells of different shapes such as cubes, cuboids, and discs, expanding the applicability of the device and meeting diverse battery cell testing needs. The height of the L-shaped positioning plates 9 can be flexibly adjusted through the lifting mechanism to adapt to the different flame heights and heat flow influence positions in battery cell combustion tests, optimizing the testing environment and improving testing accuracy. The side plates of the L-shaped positioning plates 9 limit the sides of the battery cell, effectively counteracting the lateral thrust when the battery cell expands due to thermal runaway, preventing the battery cell from tipping over or shifting, ensuring that the battery cell is at the preset combustion point, and ensuring the accuracy and repeatability of test data.

[0037] Furthermore, the retractable mechanism includes:

[0038] The transmission gear ring 7 is rotatably installed inside the positioning ring 5. Multiple transmission gears 8 are meshed and driven at intervals along the inner wall of the transmission gear ring 7 in the circumferential direction. Telescopic gear plates 6 are respectively installed on the positioning ring 5, which correspond one-to-one with the multiple transmission gears 8 and mesh with the corresponding transmission gears 8. The telescopic gear plates 6 extend in the radial direction of the positioning ring 5, and the inner end of the telescopic gear plates 6 is fixed to the outer end of the side plate of the L-shaped positioning plate 9.

[0039] The lever 3 is fixed to the outer wall of the transmission gear ring 7, with one end passing through the positioning ring 5 and the polygonal positioning cover 2. Both the positioning ring 5 and the polygonal positioning cover 2 have sliding grooves 13 inside for the lever 3 to rotate, and the height of the sliding grooves 13 is adapted to the needs of the positioning ring 5 to drive the lever 3 to move up and down. This facilitates the operation of the transmission gear ring 7 by lever 3 and also provides space for the positioning ring 5 to rise and fall.

[0040] Furthermore, a sliding rod is slidably installed inside the telescopic toothed plate 6, and the telescopic toothed plate 6 is fixedly connected to the L-shaped positioning plate 9 through the sliding rod. This ensures stable connection and smooth sliding.

[0041] Specifically, there are four transmission gears 8 and four corresponding L-shaped positioning plates 9.

[0042] Thus, in use, the polygonal positioning cover 2 is placed on the combustion chamber 1, and the lever 3 is rotated. The lever 3 slides in the sliding groove 13 and drives the transmission gear ring 7 to rotate in the positioning ring 5. Because the transmission gear 8 meshes with the transmission gear ring 7, the four transmission gears 8 rotate synchronously. The transmission gear 8 meshes with the telescopic gear plate 6, causing the four telescopic gear plates 6 to drive the L-shaped positioning plate 9 to slide above the positioning ring 5. After adjusting the position of the L-shaped positioning plate 9, the battery cell is placed in. The vertical surfaces of the side plates of the four L-shaped positioning plates 9 can limit the side of the battery cell. For cubic and cuboid battery cells, the vertical surfaces of the L-shaped positioning plates 9 can fit the edges of the battery cell; for disc-shaped battery cells, the vertical surfaces of multiple L-shaped positioning plates 9 can form an approximate arc to fit the curved edges of the battery cell, thereby effectively solving the problem of bulging and tilting caused by internal heating and pressure.

[0043] In this embodiment, the lifting mechanism includes:

[0044] An inverted U-shaped guide frame 11 is fixedly installed between the inner wall of the polygonal positioning cover 2 and the positioning ring 5;

[0045] The transmission block 10 is slidably installed on the inner bottom of the inverted U-shaped guide frame 11, and its side is fixedly connected to the outer wall of the positioning ring 5;

[0046] The threaded rod 12 has one end passing through the transmission block 10 and being threadedly connected to the transmission block 10, and the other end passing through the upper end of the guide frame.

[0047] Furthermore, for ease of operation, a turntable is provided at the end of the threaded rod 12 that runs through the upper end of the guide frame.

[0048] If the test height of the battery cell needs to be adjusted according to the test requirements, the operator can rotate the turntable of the threaded rod 12 to drive the threaded rod 12 to rotate. Since the threaded rod 12 is threadedly engaged with the transmission block 10 and the transmission block 10 is slidably installed in the guide frame 11, under the limiting action of the guide frame 11, rotating the threaded rod 12 can cause the transmission block 10 to drive the positioning ring 5 to rise or fall inside the polygonal positioning cover 2, thereby realizing the height adjustment of the L-shaped positioning plate 9, so as to adapt to the different height requirements of the battery cell combustion test and improve the adaptability of the device.

[0049] After the battery cell is positioned and its height adjusted (if applicable), the battery cell can be tested for combustion using the combustion port 4 of combustion chamber 1, following the standard procedure for battery cell combustion testing. The ignition time, combustion duration, flame temperature, and whether an explosion occurs are observed and recorded to evaluate the safety level of the battery cell.

[0050] It should be noted that the polygonal positioning cover 2 is designed with a mesh or perforated structure. During the battery cell combustion test, a large amount of combustion gas is generated. The mesh or perforated structure provides a smooth gas flow channel, allowing the exhaust gas produced by combustion to be quickly discharged and preventing it from accumulating inside the device. This not only helps maintain the stability of the test environment but also prevents pressure changes caused by gas accumulation from interfering with the test results. The combustion process releases a large amount of heat, which may affect other components of the device. The mesh or perforated design increases the contact area with the outside air, accelerates heat exchange, helps the device dissipate heat quickly, prevents local overheating from damaging the structure and performance of the positioning device, and extends the service life of the device. At the same time, it facilitates real-time observation of the battery cell combustion, such as ignition time, flame shape, and changes in the combustion range. The mesh or perforated structure does not obstruct the view, allowing testers to clearly observe the entire battery cell combustion process from multiple angles, facilitating accurate recording and analysis of test data. In addition, compared to a solid structure, the mesh or perforated structure reduces the amount of material used, thereby reducing the weight of the polygonal positioning cover 2 itself. This has a positive effect on the installation, handling and overall stability of the device. For example, it makes installation and commissioning easier, reduces the pressure on the supporting structure such as the combustion chamber 1, and also reduces the operational difficulty and safety risks that may be caused by the excessive weight of the device.

[0051] Preferably, the polygonal positioning cover 2 is detachably connected to the combustion chamber 1. When the device malfunctions, such as abnormal damage to the internal flame-spraying structure of the combustion chamber 1, the detachable connection allows operators to quickly separate the polygonal positioning cover 2 from the combustion chamber 1, and individually inspect or replace the faulty component. This eliminates the need for complete disassembly of the device, reducing maintenance difficulty and workload, shortening equipment downtime, and ensuring the continuity of testing operations.

[0052] It should be noted that the polygonal positioning cover 2 can be set as an octagonal positioning cover, i.e. an octagonal cage, or other numbers, depending on the specific situation.

[0053] It should be understood that the 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 this utility model and simplifying the description, and do not 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 this utility model.

[0054] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, an electrical connection, or a connection that allows communication between them; 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A battery cell combustion testing and positioning device, comprising a combustion chamber and a combustion port opened at the top of the combustion chamber, characterized in that, It also includes a polygonal positioning cover connected to the top of the combustion chamber and arranged around the combustion port. The polygonal positioning cover has a positioning ring with a top opening connected to it through a lifting mechanism. The inner wall of the positioning ring is provided with multiple L-shaped positioning plates spaced apart along its circumference. The L-shaped positioning plates can move radially along the positioning ring through a telescopic mechanism to clamp or release the battery cell. The bottom plate of the L-shaped positioning plate is used to support the battery cell, and the side plate abuts against the side of the battery cell.

2. The battery cell combustion testing and positioning device according to claim 1, characterized in that, The retractable mechanism includes: A transmission gear ring is rotatably installed inside the positioning ring. Multiple transmission gears are meshed and driven at intervals along the inner wall of the transmission gear ring in the circumferential direction. Telescopic gear plates are respectively installed on the positioning ring, which correspond one-to-one with the multiple transmission gears and mesh with the corresponding transmission gears. The telescopic gear plates extend in the radial direction of the positioning ring, and the inner end of the telescopic gear plate is fixed to the outer end of the side plate of the L-shaped positioning plate. A lever is fixed to the outer wall of the transmission gear ring, with one end passing through the positioning ring and the polygonal positioning cover. The positioning ring and the polygonal positioning cover both have sliding grooves inside for the lever to rotate, and the height of the sliding grooves is adapted to the needs of the positioning ring to drive the lever to move up and down.

3. The battery cell combustion testing and positioning device according to claim 2, characterized in that, The lifting mechanism includes: An inverted U-shaped guide frame is fixedly installed between the inner wall of the polygonal positioning cover and the positioning ring; The transmission block is slidably installed on the inner bottom of the inverted U-shaped guide frame, and its side is fixedly connected to the outer wall of the positioning ring; The threaded rod has one end passing through the transmission block and threadedly connected to the transmission block, and the other end passing through the upper end of the guide frame.

4. The cell combustion testing and positioning device according to claim 2, characterized in that, The telescopic toothed plate has a sliding rod slidably installed inside, and the telescopic toothed plate is fixedly connected to the L-shaped positioning plate through the sliding rod.

5. The battery cell combustion testing and positioning device according to claim 3, characterized in that, A turntable is provided at the end of the threaded rod that passes through the upper end of the guide frame.

6. The battery cell combustion testing and positioning device according to claim 2, characterized in that, There are four of each of the transmission gears and the corresponding L-shaped positioning plates.

7. The battery cell combustion testing and positioning device according to claim 1, characterized in that, The polygonal positioning cover is designed with a mesh or hollow structure.

8. The battery cell combustion testing and positioning device according to claim 1, characterized in that, The polygonal positioning cover is detachably connected to the combustion chamber.

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