A compression device for testing battery thermal runaway

Abstract

This utility model discloses a compression device for battery thermal runaway testing, including a base plate with a first test chamber at the top; a second test chamber mounted on one side of the first test chamber, with locking components on both sides of the second test chamber and a limiting component inside the second test chamber; a limiting component including a fixed plate fixedly installed between the inner walls of the second test chamber, a movable plate below the fixed plate, and movable grooves on both sides of the inner wall of the second test chamber corresponding to the movable plate, with movable blocks fixedly installed on both sides of the movable plate and slidably installed in the movable grooves; an elastic component installed in the middle of the limiting component; and a compression component installed above the elastic component. This utility model relates to the field of battery testing technology; this utility model provides buffer protection for the chamber in the event of an explosion or other similar situation through the locking components and elastic components.

Description

Technical Field

[0001] This utility model relates to the field of battery testing technology, specifically a compression device for testing battery thermal runaway. Background Technology

[0002] Battery thermal runaway refers to the phenomenon where the temperature of a single battery cell rises uncontrollably due to an exothermic chain reaction. It is usually induced by mechanical, electrical, and thermal factors, either individually or in combination. Mechanical causes include compression, puncture, and impact. External compression can cause the internal separator of the battery to rupture, resulting in a short circuit between the positive and negative electrodes and triggering a violent electrochemical reaction. Compression equipment used for battery thermal runaway testing is a key testing device for simulating the risk of thermal runaway in batteries under mechanical compression conditions, and is widely used in the safety performance evaluation of products such as power batteries and energy storage batteries.

[0003] In existing technologies, batteries are typically placed inside a device, and the device door is closed before testing. However, lithium-ion batteries are prone to explosive combustion after being subjected to high-pressure compression, which can easily lead to deformation or rupture of the chamber. Therefore, this invention provides a compression device for battery thermal runaway testing, which uses springs, connecting plates, and limiting blocks to solve the aforementioned problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a compression device for testing battery thermal runaway, thus solving the aforementioned problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a compression device for battery thermal runaway testing, comprising; A base plate, with a first test box mounted on its top; A second test box is installed on one side of the first test box, with locking components on both sides of the second test box and a limit component inside the second test box; A limiting component includes a fixed plate, which is fixedly installed between the inner walls of the second test chamber. A movable plate is provided below the fixed plate. Movable grooves are provided on both sides of the inner wall of the second test chamber corresponding to the movable plate. Movable blocks are fixedly installed on both sides of the movable plate and are slidably installed in the movable grooves. An elastic component is disposed in the middle of the limiting component; A compression assembly is mounted above the elastic assembly.

[0006] Preferably, a pad is fixedly installed on one side of the top of the base plate, two second T-shaped grooves are opened in the bottom wall of the first test box, two first T-shaped grooves are opened on the upper surface of the pad, and two T-shaped sliders are fixedly installed at the bottom of the second test box. The second test box is slidably installed in the first test box and on the pad through the T-shaped sliders at the bottom.

[0007] Preferably, the elastic component includes several sets of springs, all of which are located between the movable plate and the fixed plate. The top of the movable plate has several sets of first mounting holes corresponding to the spring positions, and the bottom of the fixed plate has several sets of second mounting holes corresponding to the spring positions. A damping sleeve is fitted inside the spring, and a support column is inserted into the damping sleeve. The bottom end of the support column is fixedly installed in the first mounting hole.

[0008] Preferably, the locking assembly includes two sets of fixing blocks, which are symmetrically arranged and fixedly installed on the outer wall of the second test chamber. A rotating block is rotatably installed between each set of fixing blocks via a rotating shaft. A limiting groove is formed on one end surface of the rotating block, and a connecting post is provided on one side of the rotating block. Two connecting posts are symmetrically arranged, and one end of each connecting post is fixedly installed on the outer wall of the first test chamber. A limiting block is provided on the other side of the connecting post, and a through hole is formed on the surface of the limiting block. A bearing is fixedly installed in the through hole, and a fixed shaft is rotatably installed in the through hole via the bearing. The other end of the connecting post is fixedly connected to one end of the fixed shaft.

[0009] Preferably, the limiting block is smaller than the limiting groove, and the limiting block can penetrate the limiting groove.

[0010] Preferably, the extrusion assembly includes a cylinder, one end of which is fixedly installed on the top of the inner wall of the second test chamber, a limit hole is provided between the movable plate and the fixed plate, and the output end of the cylinder passes through the limit hole and is fixedly installed with a pressure plate.

[0011] Preferably, the inner wall of the first test chamber is provided with a ceramic fiber felt layer, and a carbon fiber flexible graphite layer is provided on one side of the ceramic fiber felt layer. A placement box is fixedly installed at the bottom of the second test chamber, and the placement box is located directly below the pressure plate.

[0012] Beneficial effects: This utility model provides a compression device for testing battery thermal runaway. Compared with the prior art, it has the following beneficial effects: (1) The extrusion device for battery thermal runaway testing, through the locking assembly, allows the second test box to move inside the first test box. By sliding the bottom T-shaped slider along the second T-shaped groove and the first T-shaped groove of the first test box, the second test box can be pushed out to the opening to expose the battery. During the test, it is pushed back into the first test box and fixed by the locking assembly. The locking assembly locks the box by rotating the rotating block, so that the limiting block rotates 90 degrees through the limiting groove to the vertical position. This can reduce the possibility of the box suddenly popping open unexpectedly in the event of an explosion during the test, thus ensuring test safety.

[0013] (2) The extrusion device for the battery thermal runaway test uses an elastic component to place the battery in the placement box, pushes it back into the second test box and fixes it with a locking component, and starts the cylinder to drive the pressure plate to complete the extrusion test. When the battery explodes, the instantaneous pressure of the battery pushes the movable plate to move upward along the moving groove. The elastic deformation of the spring and the hysteresis effect of the damping sleeve prolong the action time of the explosion impact load, reduce the fatigue damage of the chamber to the vibration, and provide buffer protection for the chamber. Attached Figure Description

[0014] Figure 1 This is a perspective view of the external structure of this utility model; Figure 2 This is a perspective view of the external structure of the second test box of this utility model; Figure 3 This is a perspective view of the external structure of the first test box of this utility model; Figure 4 This is a utility model Figure 2 Enlarged view of point A in the middle; Figure 5 This is a utility model Figure 3 Enlarged view of point B in the middle; Figure 6 This is a partial sectional view of the fixed plate and the movable plate of this utility model.

[0015] In the diagram: 1. First test box; 2. Base plate; 3. Second test box; 4. First T-shaped slide; 5. Locking assembly; 501. Fixing block; 502. Rotating block; 503. Limiting groove; 504. Connecting column; 505. Limiting block; 506. Bearing; 507. Through hole; 508. Fixing shaft; 6. Placement box; 7. Pad; 8. T-shaped slider; 9. First T-shaped slide; 10. Limiting assembly; 1001. Fixing plate; 1002. Movable plate; 1003. Moving groove; 1004. Moving block; 11. Cylinder; 12. Pressure plate; 13. Carbon fiber flexible graphite layer; 14. Ceramic fiber felt layer; 15. Elastic component; 1501. Spring; 1502. First mounting hole; 1503. Second mounting hole; 1504. Damping sleeve; 1505. Support column. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example 1: Please refer to Figure 1-6 A compression device for testing battery thermal runaway, comprising: Base plate 2, with the first test box 1 installed at the top of base plate 2; A second test box 3 is installed on one side of the first test box 1. Locking components 5 are provided on both sides of the second test box 3. Limiting components 10 are provided inside the second test box 3. The limiting component 10 includes a fixed plate 1001, which is fixedly installed between the inner walls of the second test chamber 3. A movable plate 1002 is provided below the fixed plate 1001. Movable grooves 1003 are opened on both sides of the inner wall of the second test chamber 3 corresponding to the movable plate 1002. Movable blocks 1004 are fixedly installed on both sides of the movable plate 1002 and are slidably installed in the movable grooves 1003. Elastic component 15 is installed in the middle of limit component 10; The extrusion assembly is mounted above the elastic assembly 15.

[0018] In this embodiment, the limiting component 10 can play a certain role in resisting an explosion. The limiting component 10 is connected to the movable plate 1002. When an explosion occurs, the instantaneous pressure of the battery pushes the movable plate 1002 to move upward in the moving groove 1003, and the elastic component 15 provides a certain buffer.

[0019] Example 2: Please see Figure 1-3 This embodiment provides a technical solution based on embodiment one: a pad 7 is fixedly installed on one side of the top of the base plate 2, two second T-shaped sliding grooves 9 are opened in the bottom wall of the first test box 1, two first T-shaped sliding grooves 4 are opened at the top of the pad 7, and two T-shaped sliders 8 are fixedly installed at the bottom of the second test box 3. The second test box 3 is slidably installed in the first test box 1 and on the pad 7 through the T-shaped sliders 8 set at the bottom.

[0020] In this embodiment, the pad 7 facilitates the movement of the second test box 3 back and forth within the first test box 1. When it is necessary to push the second test box 3 out of the first test box 1 and place the battery into the second test box 3 for testing, the second test box 3 is pushed to one side. The T-shaped slider 8 fixedly installed at the bottom of the second test box 3 slides to one side from the two second T-shaped slide grooves 9 opened on the bottom wall of the first test box 1, sliding to the first T-shaped slide groove 4. When the opening of the second test box 3 is exposed to facilitate the placement of the battery, the pushing can be stopped. When testing is required, the second test box 3 is pushed into the first test box 1 and locked by the locking component 5.

[0021] Please see Figure 6 The elastic component 15 includes several sets of springs 1501, all of which are located between the movable plate 1002 and the fixed plate 1001. The top of the movable plate 1002 is provided with several sets of first mounting holes 1502 corresponding to the position of the springs 1501, and the bottom of the fixed plate 1001 is provided with several sets of second mounting holes 1503 corresponding to the position of the springs 1501. A damping sleeve 1504 is sleeved inside the springs 1501, and a support column 1505 is inserted into the damping sleeve 1504. The bottom end of the support column 1505 is fixedly installed in the first mounting hole 1502.

[0022] In this embodiment, the elastic component 15 provides a certain buffering effect on the housing in the event of an explosion. The spring 1501, damping sleeve 1504, and support column 1505 provided in the elastic component 15 extend the impact load duration through the elastic deformation of the spring 1501 and the hysteresis effect of the damping during an explosion. At the same time, the instantaneous pressure of the battery will cause the equipment to vibrate violently. The spring 1501 and damping sleeve 1504 can reduce the fatigue damage of the housing caused by the vibration.

[0023] Please see Figure 2 and Figure 5 The locking assembly 5 includes two sets of fixing blocks 501, which are symmetrically arranged and fixedly installed on the outer wall of the second test chamber 3. A rotating block 502 is rotatably installed between each set of fixing blocks 501 via a rotating shaft. A limiting groove 503 is formed on one end of the rotating block 502. A connecting post 504 is provided on one side of the rotating block 502. Two connecting posts 504 are symmetrically arranged. One end of each connecting post 504 is fixedly installed on the outer wall of the first test chamber 1. A limiting block 505 is provided on the other side of the connecting post 504. A through hole 507 is formed on the surface of the limiting block 505. A bearing 506 is fixedly installed in the through hole 507. A fixed shaft 508 is rotatably installed in the through hole 507 via the bearing 506. The other end of the connecting post 504 is fixedly connected to one end of the fixed shaft 508. The limiting block 505 is smaller than the limiting groove 503 and can penetrate the limiting groove 503.

[0024] In this embodiment, the locking component 5 is used to lock the first test box 1 and the second test box 3 during testing. The locking component 5 uses a rotating block 502 to rotate the limiting block 505 to a vertical position. The limiting groove 503 on the surface of the rotating block 502 passes through the limiting block 505. The limiting block 505 is rotated to 90 degrees, thus completing the locking work. This ensures that the box will not suddenly and accidentally pop open in the event of an explosion during testing.

[0025] Please see Figure 2 The extrusion assembly includes a cylinder 11, one end of which is fixedly installed on the top of the inner wall of the second test chamber 3. A limit hole is opened between the movable plate 1002 and the fixed plate 1001. The output end of the cylinder 11 passes through the limit hole and is fixedly installed with a pressure plate 12. A ceramic fiber felt layer 14 is provided on the inner wall of the first test chamber 1. A carbon fiber flexible graphite layer 13 is provided on one side of the ceramic fiber felt layer 14. A placement box 6 is fixedly installed at the bottom of the second test chamber 3. The placement box 6 is located directly below the pressure plate 12.

[0026] In this embodiment, the compression assembly is used to perform compression testing on the battery. The battery is placed in the placement box 6, the second test box 3 is pushed into the first test box 1, and the locking assembly 5 is used to lock it. Then, the cylinder 11 is activated to drive the pressure plate 12 to perform compression testing on the battery. The carbon fiber flexible graphite layer 13 can ensure gas sealing under dynamic pressure to a certain extent, and the ceramic fiber felt layer 14 can buffer the impact of high-temperature fragments and reduce mechanical damage to the sealing structure.

[0027] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An extrusion apparatus for battery thermal runaway testing, characterized by, include; The base plate (2) has a first test box (1) at its top. A second test box (3) is installed on one side of the first test box (1). Locking components (5) are provided on both sides of the second test box (3). Limiting components (10) are provided inside the second test box (3). The limiting component (10) includes a fixed plate (1001), which is fixedly installed between the inner walls of the second test box (3). A movable plate (1002) is provided below the fixed plate (1001). Movable grooves (1003) are provided on both sides of the inner wall of the second test box (3) corresponding to the movable plate (1002). Movable blocks (1004) are fixedly installed on both sides of the movable plate (1002). The movable blocks (1004) are slidably installed in the movable grooves (1003). An elastic component (15) is installed in the middle of the limiting component (10); A compression assembly is mounted above the elastic component (15).

2. The extrusion apparatus for battery thermal runaway testing of claim 1, wherein, A pad (7) is fixedly installed on one side of the top of the base plate (2). Two second T-shaped grooves (9) are opened on the bottom wall of the first test box (1). Two first T-shaped grooves (4) are opened on the upper surface of the pad (7). Two T-shaped sliders (8) are fixedly installed at the bottom of the second test box (3). The second test box (3) is slidably installed in the first test box (1) and on the pad (7) through the T-shaped sliders (8) set at the bottom.

3. The extrusion apparatus for battery thermal runaway testing of claim 1, wherein, The elastic component (15) includes several sets of springs (1501), each spring (1501) being located between the movable plate (1002) and the fixed plate (1001). The top of the movable plate (1002) is provided with several sets of first mounting holes (1502) corresponding to the position of the springs (1501), and the bottom of the fixed plate (1001) is provided with several sets of second mounting holes (1503) corresponding to the position of the springs (1501). A damping sleeve (1504) is fitted inside the springs (1501), and a support column (1505) is inserted into the damping sleeve (1504). The bottom end of the support column (1505) is fixedly installed in the first mounting hole (1502).

4. The extrusion apparatus for battery thermal runaway testing of claim 1, wherein, The locking assembly (5) includes two sets of fixing blocks (501), which are symmetrically arranged. Both sets of fixing blocks (501) are fixedly installed on the outer wall of the second test box (3). A rotating block (502) is rotatably installed between each set of fixing blocks (501) via a rotating shaft. A limit groove (503) is formed on one end surface of the rotating block (502). A connecting post (504) is provided on one side of the rotating block (502). The connecting post (504) is symmetrically arranged with... Two connecting columns (504) are fixedly installed at one end on the outer wall of the first test box (1). A limit block (505) is provided on the other side of the connecting column (504). A through hole (507) is opened on the surface of the limit block (505). A bearing (506) is fixedly installed in the through hole (507). A fixed shaft (508) is rotatably installed in the through hole (507) through the bearing (506). The other end of the connecting column (504) is fixedly connected to one end of the fixed shaft (508).

5. The extrusion apparatus for battery thermal runaway testing of claim 4, wherein, The limiting block (505) is smaller than the limiting groove (503), and the limiting block (505) can penetrate the limiting groove (503).

6. The extrusion apparatus for battery thermal runaway testing of claim 1, wherein, The extrusion assembly includes a cylinder (11), one end of which is fixedly installed on the top of the inner wall of the second test chamber (3). A limit hole is opened in the middle of the movable plate (1002) and the fixed plate (1001). The output end of the cylinder (11) passes through the limit hole and is fixedly installed with a pressure plate (12).

7. The extrusion apparatus for battery thermal runaway testing of claim 1, wherein, The inner wall of the first test chamber (1) is provided with a ceramic fiber felt layer (14), and a carbon fiber flexible graphite layer (13) is provided on one side of the ceramic fiber felt layer (14). The bottom of the second test chamber (3) is fixedly installed with a placement box (6), which is located directly below the pressure plate (12).

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