Lithium battery cell external short circuit test tool

Abstract

The application belongs to the technical field of lithium battery detection, and particularly relates to a lithium battery cell external short circuit test tool. In view of the problems existing in the prior art, the following scheme is proposed, which comprises a side shell, a bottom box is fixedly connected to the bottom outer wall of the side shell, a tester is fixedly connected to the side outer wall of the side shell, sliding rails are fixedly connected to the inside bottom of both sides of the side shell, outer frames are slidingly connected to both ends of the sliding rails, fixed suction shells are fixedly connected to the side inner walls of the outer frames, fixed conductive blocks are fixedly connected to the center positions of the fixed suction shells, rotating suction shells are rotatably connected to the side outer walls of the fixed suction shells, and rotating conductive blocks are fixedly connected to the side outer walls of the rotating suction shells. When the cell is tested, the wiping blocks can wipe the two ends of the cell in the process of entering the two rotating conductive blocks, dust can be adsorbed through the negative pressure mechanism, and thus the residual dust at the two ends of the cell can be prevented, so that the detection precision is reduced.

Description

Technical Field

[0001] This invention relates to the field of lithium battery testing technology, and in particular to a short-circuit testing fixture for external lithium battery cells. Background Technology

[0002] Lithium-ion batteries have advantages such as high specific energy, high cycle life, and long storage time. They are widely used not only in portable electronic devices such as mobile phones, digital cameras, and laptops, but also in large and medium-sized electric equipment such as electric vehicles, electric bicycles, and power tools. Therefore, the performance requirements for lithium-ion batteries are becoming increasingly stringent. The production of semi-finished lithium batteries into finished lithium batteries requires multiple processing steps, and finished lithium batteries need further testing before they can be launched on the market. Short-circuit testing of lithium battery cells is one of the most important aspects of battery testing.

[0003] Short-circuit testing of lithium battery cells typically involves connecting electrode blocks to both ends of the lithium battery cell, and then connecting the electrode blocks to a tester for testing. However, existing lithium battery testing equipment often encounters problems during short-circuit testing because the ends of the lithium battery cell are easily contaminated with dust during production and transportation. This dust can obstruct the contact between the electrode blocks and the ends of the cell, leading to testing errors. Summary of the Invention

[0004] Based on the technical problems existing in the prior art, this invention proposes an external short-circuit test fixture for lithium battery cells.

[0005] This invention proposes a short-circuit testing fixture for lithium battery cells, comprising a side shell, a base box fixedly connected to the bottom outer wall of the side shell, a tester fixedly connected to one side outer wall of the side shell, slide rails fixedly connected to the bottom of both sides of the side shell, and outer frames slidably connected to both ends of the slide rails, a fixed suction shell fixedly connected to the inner side wall of the outer frame, a fixed conductive block fixedly connected to the center of the fixed suction shell, a rotating suction shell rotatably connected to one side outer wall of the fixed suction shell, and a rotating conductive block with uniformly distributed rings fixedly connected to the outer side wall of the rotating suction shell, the rotating conductive block being rotatably connected to the fixed conductive block, the fixed conductive block being electrically connected to the tester, guide grooves offset from the rotating conductive block being opened on the outer side wall of the rotating suction shell, a negative pressure mechanism connected to one side of the fixed suction shell, and a support mechanism provided between the two outer frames.

[0006] Preferably, a pressure shell located on one side of the guide groove is fixedly connected to the outer side wall of the rotating suction shell, and a movable shell is slidably connected to the inner side wall of the pressure shell. A compression spring is fixedly connected between one side outer wall of the movable shell and one side inner wall of the pressure shell, and a wiping block is fixedly connected to the other side outer wall of the movable shell. The movable shell is a shell structure with through holes at both ends.

[0007] Preferably, the support mechanism includes a support plate, and both sides of the top outer wall of the support plate are provided with support rods parallel to the slide rail, and the two ends of the support rods are fixedly connected to the support plate with support columns.

[0008] Preferably, a support plate is fixedly connected to the inner side wall of the base box, and a pressure rod is slidably connected to the inner side wall of the support plate. The top end of the pressure rod is fixedly connected to the bottom outer wall of the support plate, and a pressure plate is slidably connected to the bottom end of the pressure rod. A return spring is fixedly connected between the bottom outer wall of the pressure plate and the bottom inner wall of the base box, and a pull rope is fixedly connected to the bottom outer wall of the pressure plate.

[0009] Preferably, the negative pressure mechanism includes a telescopic hose inserted into the outer wall of one side of the fixed suction shell, and the other end of the telescopic hose is inserted into the outer wall of the side of the bottom box. The end of the telescopic hose is located above the air pressure plate. An air inlet groove is opened on the top outer wall of the air pressure plate, and an air inlet baffle that can be folded down is rotatably connected to the inner wall of the side of the air inlet groove.

[0010] Preferably, the outer side wall of the bottom box has a frame groove, and a filter frame is slidably connected to the inner side wall of the frame groove. A dust filter is fixedly connected to the inner side wall of the filter frame, and the filter frame is located between one end of the air compressor plate and the telescopic hose.

[0011] Preferably, the top outer wall of the outer frame is hinged to both sides with connecting rods, and the side outer wall of the support column is fixedly connected to a slide, with the other end of the connecting rod hinged to the side outer wall of the slide.

[0012] Preferably, connecting rods are hinged to both sides of the top outer wall of the outer frame, and a slide is fixedly connected to the side outer wall of the support column. A slider is slidably connected to the side outer wall of the slide, and a locking button is threadedly connected to the side outer wall of the slider. The other end of the connecting rod is hinged to the side outer wall of the slider.

[0013] Preferably, an outer shell is fixedly connected to the side outer wall of the carriage, an inner rod is slidably connected to the side inner wall of the outer shell, a fixing block is fixedly connected to the other end of the inner rod, a vertical slide rail is fixedly connected to the side outer wall of the outer frame, the fixing block slides up and down along the vertical slide rail, toothed belts are fixedly connected to the side outer wall and bottom outer wall of the fixing block, and a toothed ring is fixedly connected to the side outer wall of the rotating suction shell, with the toothed belt meshing with the toothed ring.

[0014] The beneficial effects of this invention are as follows: By setting a fixed suction shell and a rotating suction shell, a wiping block is set on the rotating suction shell. When the battery cell is tested, the wiping block can wipe both ends of the battery cell during the process of the battery cell entering between the two rotating conductive blocks. The negative pressure mechanism can adsorb the dust, thereby preventing dust from remaining at both ends of the battery cell and reducing the accuracy of the test. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an external short-circuit test fixture for lithium battery cells proposed in this invention.

[0016] Figure 2 This is a schematic diagram of the slide structure of an external short-circuit test fixture for lithium battery cells proposed in this invention;

[0017] Figure 3 This is a schematic diagram of the outer frame structure of an external short-circuit test fixture for lithium battery cells proposed in this invention;

[0018] Figure 4 This is a side cross-sectional view of the fixed suction shell of a lithium battery cell external short-circuit test fixture proposed in this invention;

[0019] Figure 5 This is a partial sectional view of the bottom box of a lithium battery cell external short-circuit test fixture proposed in this invention;

[0020] Figure 6 This is a schematic diagram of the air inlet structure of an external short-circuit test fixture for lithium battery cells proposed in this invention.

[0021] Figure 7 This is a schematic diagram of the internal structure of the bottom box of a lithium battery cell external short-circuit test fixture proposed in this invention.

[0022] In the diagram: 1 Side shell, 2 Filter frame, 3 Base box, 4 Pressure shell, 5 Rotating conductive block, 6 Wiping block, 7 Inner rod, 8 Outer shell, 9 Support plate, 10 Support rod, 11 Slider, 12 Slide car, 13 Connecting rod, 14 Outer frame, 15 Tester, 16 Fixed conductive block, 17 Telescopic hose, 19 Slide rail, 20 Pressure rod, 21 Support column, 22 Locking button, 23 Fixed block, 24 Vertical slide rail, 25 Toothed belt, 26 Toothed ring, 27 Fixed suction shell, 28 Movable shell, 29 Rotating suction shell, 30 Compression spring, 31 Guide groove, 32 Support plate, 33 Dust filter, 34 Air inlet baffle, 35 Air pressure plate, 36 Pull rope, 37 Air inlet groove, 38 Return spring. Detailed Implementation

[0023] Example 1

[0024] Reference Figure 1A short-circuit testing fixture for an external lithium battery cell includes a side shell 1. A base box 3 is fixedly connected to the bottom outer wall of the side shell 1, and a tester 15 is fixedly connected to one side outer wall of the side shell 1. The fixture is characterized in that slide rails 19 are fixedly connected to the bottom interior of both sides of the side shell 1, and outer frames 14 are slidably connected to both ends of the slide rails 19. A fixed suction shell 27 is fixedly connected to the inner side wall of the outer frame 14. A fixed conductive block 16 is fixedly connected to the center of the fixed suction shell 27. A rotating suction shell 29 is rotatably connected to one side outer wall of the fixed suction shell 27. A ring-shaped, uniformly distributed rotating conductive block 5 is fixedly connected to the outer side wall of the rotating suction shell 29. The rotating conductive block 5 is rotatably connected to the fixed conductive block 16. The fixed conductive blocks 16 are electrically connected to each other through rotating brushes. The rotating conductive block 5 can still be energized with the fixed conductive block 16 when it rotates. The fixed conductive block 16 is electrically connected to the tester 15. When the two rotating conductive blocks 5 are in contact with the two ends of the lithium battery cell, the tester 15 can perform a short circuit test on the cell. The outer side wall of the rotating suction shell 29 has guide grooves 31 that are staggered with the rotating conductive blocks 5. A negative pressure mechanism is connected to one side of the fixed suction shell 27. The negative pressure mechanism can generate negative pressure at the guide grooves 31, thereby cleaning the dust at the end of the cell before testing the cell and preventing the dust from affecting the cell test. A support mechanism is provided between the two outer frames 14. The support mechanism is used to place the cell to be tested.

[0025] In this invention, reference is made to Figure 3 and Figure 4 The outer side wall of the rotating suction shell 29 is fixedly connected to the pressure shell 4 located on one side of the guide groove 31, and the inner side wall of the pressure shell 4 is slidably connected to the movable shell 28. A compression spring 30 is fixedly connected between one side outer wall of the movable shell 28 and one side inner wall of the pressure shell 4. A wiping block 6 is fixedly connected to the other side outer wall of the movable shell 28. The movable shell 28 is a shell structure with through holes at both ends. The wiping block 6 is a porous wiping material. The wiping block 6 can wipe the end of the battery cell.

[0026] Among them, reference Figure 1 The support mechanism includes a support plate 9, and support rods 10 parallel to the slide rail 19 are provided on both sides of the top outer wall of the support plate 9. Support columns 21 are fixedly connected between the two ends of the support rods 10 and the support plate 9. During testing, the battery cell is placed on the support column 21.

[0027] Among them, reference Figure 7A support plate 32 is fixedly connected to the inner side wall of the base box 3, and a pressure rod 20 is slidably connected to the inner side wall of the support plate 32. The top end of the pressure rod 20 is fixedly connected to the bottom outer wall of the support plate 9, and the bottom end of the pressure rod 20 is fixedly connected to a pressure plate 35 slidably connected to the inner side wall of the base box 3. A return spring 38 is fixedly connected between the bottom outer wall of the pressure plate 35 and the bottom inner wall of the base box 3. A pull rope 36 is fixedly connected to the bottom outer wall of the pressure plate 35. The other end of the pull rope 36 can be connected to a motor-driven winding wheel, or it can be pulled manually. After the battery cell is placed on the support column 21, pulling the pull rope 36 downwards can cause the support plate 9 to move down and move between the two rotating conductive blocks 5.

[0028] Among them, reference Figure 5 , Figure 6 and Figure 7 The negative pressure mechanism includes a telescopic hose 17 inserted into the outer wall of one side of the fixed suction shell 27, and the other end of the telescopic hose 17 is inserted into the outer wall of the side of the base box 3. The end of the telescopic hose 17 is located above the air pressure plate 35. The top outer wall of the air pressure plate 35 has an air inlet groove 37. The inner side wall of the air inlet groove 37 is rotatably connected to an air inlet baffle 34 that can be folded downward. When the pull rope 36 is pulled downward, the air pressure plate 35 will move downward, thereby generating negative pressure above the air pressure plate 35, which in turn generates negative pressure at the wiping block 6, sucking away the dust wiped by the wiping block 6, so that the wiping block 6 can be used for a long time. When the air pressure plate 35 moves upward, the gas will be discharged from the air inlet groove 37.

[0029] Among them, reference Figure 5 and Figure 7 The outer side wall of the bottom box 3 has a frame groove, and the inner side wall of the frame groove is slidably connected to a filter frame 2. The inner side wall of the filter frame 2 is fixedly connected to a dust filter 33. The filter frame 2 is located between one end of the air compressor plate 35 and the telescopic hose 17. The dust sucked out from the wiping block 6 will be filtered through the filter frame 2.

[0030] Among them, reference Figure 1 and Figure 3 The top outer wall of the outer frame 14 is hinged with connecting rods 13 on both sides, and the side outer wall of the support column 21 is fixedly connected with a slide 12. The other end of the connecting rod 13 is hinged to the side outer wall of the slide 12. When the support plate 9 moves downward, the connecting rod 13 will pull the outer frame 14 on both sides closer to the two ends of the battery cell, so that the rotating conductive block 5 presses on the end of the battery cell.

[0031] Among them, reference Figure 3The outer side wall of the slide 12 is fixedly connected to the outer shell 8, the inner side wall of the outer shell 8 is slidably connected to the inner rod 7, and the other end of the inner rod 7 is fixedly connected to the fixing block 23. The outer side wall of the outer frame 14 is fixedly connected to the vertical slide rail 24, and the fixing block 23 slides up and down along the vertical slide rail 24. The outer side wall and bottom outer wall of the fixing block 23 are both fixedly connected to the toothed belt 25. The outer side wall of the rotating suction shell 29 is fixedly connected to the toothed ring 26. The toothed belt 25 meshes with the toothed ring 26. When the support plate 9 moves downward and the outer frame 14 moves closer to both ends of the battery cell, the fixing block 23 will move downward, thereby driving the rotating suction shell 29 to rotate through the toothed belt 25, so as to fully wipe the end of the battery cell.

[0032] Working principle: The battery cell to be tested is placed on two support rods 10. Then, the pull rope 36 is pulled electrically or manually to make the support plate 9 move downward. When the support plate 9 moves downward, the connecting rod 13 pulls the outer frames 14 on both sides closer to the ends of the battery cell. At the same time, the fixed block 23 moves downward, which in turn drives the rotating suction shell 29 to rotate through the toothed belt 25. When the wiping block 6 contacts the end of the battery cell, the rotating wiping block 6 will wipe the end of the battery cell. At the same time, the movable shell 28 will gradually compress into the pressure shell 4 until the rotating conductive block 5 contacts the end of the battery cell. At this time, the short circuit test of the battery cell can be performed by the tester 15. When the pull rope 36 is pulled downward, the air pressure plate 35 will move downward, which will generate negative pressure above the air pressure plate 35, and then generate negative pressure at the wiping block 6, sucking away the dust wiped by the wiping block 6, so that the wiping block 6 can be used for a long time. When the air pressure plate 35 moves upward, the gas will be discharged from the air inlet 37.

[0033] Example 2

[0034] Reference Figure 1A short-circuit testing fixture for an external lithium battery cell includes a side shell 1. A base box 3 is fixedly connected to the bottom outer wall of the side shell 1, and a tester 15 is fixedly connected to one side outer wall of the side shell 1. The fixture is characterized in that slide rails 19 are fixedly connected to the bottom interior of both sides of the side shell 1, and outer frames 14 are slidably connected to both ends of the slide rails 19. A fixed suction shell 27 is fixedly connected to the inner side wall of the outer frame 14. A fixed conductive block 16 is fixedly connected to the center of the fixed suction shell 27. A rotating suction shell 29 is rotatably connected to one side outer wall of the fixed suction shell 27. A ring-shaped, uniformly distributed rotating conductive block 5 is fixedly connected to the outer side wall of the rotating suction shell 29. The rotating conductive block 5 is rotatably connected to the fixed conductive block 16. The fixed conductive blocks 16 are electrically connected to each other through rotating brushes. The rotating conductive block 5 can still be energized with the fixed conductive block 16 when it rotates. The fixed conductive block 16 is electrically connected to the tester 15. When the two rotating conductive blocks 5 are in contact with the two ends of the lithium battery cell, the tester 15 can perform a short circuit test on the cell. The outer side wall of the rotating suction shell 29 has guide grooves 31 that are staggered with the rotating conductive blocks 5. A negative pressure mechanism is connected to one side of the fixed suction shell 27. The negative pressure mechanism can generate negative pressure at the guide grooves 31, thereby cleaning the dust at the end of the cell before testing the cell and preventing the dust from affecting the cell test. A support mechanism is provided between the two outer frames 14. The support mechanism is used to place the cell to be tested.

[0035] In this invention, reference is made to Figure 3 and Figure 4 The outer side wall of the rotating suction shell 29 is fixedly connected to the pressure shell 4 located on one side of the guide groove 31, and the inner side wall of the pressure shell 4 is slidably connected to the movable shell 28. A compression spring 30 is fixedly connected between one side outer wall of the movable shell 28 and one side inner wall of the pressure shell 4. A wiping block 6 is fixedly connected to the other side outer wall of the movable shell 28. The movable shell 28 is a shell structure with through holes at both ends. The wiping block 6 is a porous wiping material. The wiping block 6 can wipe the end of the battery cell.

[0036] Among them, reference Figure 1 The support mechanism includes a support plate 9, and support rods 10 parallel to the slide rail 19 are provided on both sides of the top outer wall of the support plate 9. Support columns 21 are fixedly connected between the two ends of the support rods 10 and the support plate 9. During testing, the battery cell is placed on the support column 21.

[0037] Among them, reference Figure 7A support plate 32 is fixedly connected to the inner side wall of the base box 3, and a pressure rod 20 is slidably connected to the inner side wall of the support plate 32. The top end of the pressure rod 20 is fixedly connected to the bottom outer wall of the support plate 9, and the bottom end of the pressure rod 20 is fixedly connected to a pressure plate 35 slidably connected to the inner side wall of the base box 3. A return spring 38 is fixedly connected between the bottom outer wall of the pressure plate 35 and the bottom inner wall of the base box 3. A pull rope 36 is fixedly connected to the bottom outer wall of the pressure plate 35. The other end of the pull rope 36 can be connected to a motor-driven winding wheel, or it can be pulled manually. After the battery cell is placed on the support column 21, pulling the pull rope 36 downwards can cause the support plate 9 to move down and move between the two rotating conductive blocks 5.

[0038] Among them, reference Figure 5 , Figure 6 and Figure 7 The negative pressure mechanism includes a telescopic hose 17 inserted into the outer wall of one side of the fixed suction shell 27, and the other end of the telescopic hose 17 is inserted into the outer wall of the side of the base box 3. The end of the telescopic hose 17 is located above the air pressure plate 35. The top outer wall of the air pressure plate 35 has an air inlet groove 37. The inner side wall of the air inlet groove 37 is rotatably connected to an air inlet baffle 34 that can be folded downward. When the pull rope 36 is pulled downward, the air pressure plate 35 will move downward, thereby generating negative pressure above the air pressure plate 35, which in turn generates negative pressure at the wiping block 6, sucking away the dust wiped by the wiping block 6, so that the wiping block 6 can be used for a long time. When the air pressure plate 35 moves upward, the gas will be discharged from the air inlet groove 37.

[0039] Among them, reference Figure 5 and Figure 7 The outer side wall of the bottom box 3 has a frame groove, and the inner side wall of the frame groove is slidably connected to a filter frame 2. The inner side wall of the filter frame 2 is fixedly connected to a dust filter 33. The filter frame 2 is located between one end of the air compressor plate 35 and the telescopic hose 17. The dust sucked out from the wiping block 6 will be filtered through the filter frame 2.

[0040] Among them, reference Figure 2 The top outer wall of the outer frame 14 is hinged with connecting rods 13 on both sides, and the side outer wall of the support column 21 is fixedly connected with a slide 12. The side outer wall of the slide 12 is slidably connected with a slider 11. The side outer wall of the slider 11 is connected with a locking button 22 by a thread. The other end of the connecting rod 13 is hinged to the side outer wall of the slider 11. Sliding the slider 11 downwards can adjust the distance between the support plate 9 and the outer frame 14 in the initial position, and thus adjust the distance between the two rotating conductive blocks 5 when the support plate 9 moves to the bottom, so as to adapt to different cell lengths.

[0041] Among them, reference Figure 3The outer side wall of the slide 12 is fixedly connected to the outer shell 8, the inner side wall of the outer shell 8 is slidably connected to the inner rod 7, and the other end of the inner rod 7 is fixedly connected to the fixing block 23. The outer side wall of the outer frame 14 is fixedly connected to the vertical slide rail 24, and the fixing block 23 slides up and down along the vertical slide rail 24. The outer side wall and bottom outer wall of the fixing block 23 are both fixedly connected to the toothed belt 25. The outer side wall of the rotating suction shell 29 is fixedly connected to the toothed ring 26. The toothed belt 25 meshes with the toothed ring 26. When the support plate 9 moves downward and the outer frame 14 moves closer to both ends of the battery cell, the fixing block 23 will move downward, thereby driving the rotating suction shell 29 to rotate through the toothed belt 25, so as to fully wipe the end of the battery cell.

[0042] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A short-circuit testing fixture for an external lithium battery cell, comprising a side shell (1), a bottom box (3) fixedly connected to the bottom outer wall of the side shell (1), and a tester (15) fixedly connected to one side outer wall of the side shell (1), characterized in that, The inner bottom of both sides of the side shell (1) is fixedly connected to a slide rail (19), and both ends of the slide rail (19) are slidably connected to an outer frame (14). The inner side wall of the outer frame (14) is fixedly connected to a fixed suction shell (27). The center of the fixed suction shell (27) is fixedly connected to a fixed conductive block (16). The outer side wall of the fixed suction shell (27) is rotatably connected to a rotating suction shell (29). The outer side wall of the rotating suction shell (29) is fixedly connected to a rotating conductive block (5) that is evenly distributed in a ring. The rotating conductive block (5) is rotatably connected to the fixed conductive block (16). The fixed conductive block (16) is electrically connected to the tester (15). The outer side wall of the rotating suction shell (29) has a guide groove (31) that is offset from the rotating conductive block (5). The side of the fixed suction shell (27) is connected to a negative pressure mechanism. A support mechanism is provided between the two outer frames (14). The rotating suction shell (29) is fixedly connected to a pressure shell (4) located on one side of the guide groove (31) on its outer side wall, and a movable shell (28) is slidably connected to the inner side wall of the pressure shell (4). A compression spring (30) is fixedly connected between one side outer wall of the movable shell (28) and one side inner wall of the pressure shell (4). A wiping block (6) is fixedly connected to the other side outer wall of the movable shell (28). The movable shell (28) is a shell structure with through holes at both ends.

2. The lithium battery cell external short-circuit test fixture according to claim 1, characterized in that, The support mechanism includes a support plate (9), and both sides of the top outer wall of the support plate (9) are provided with support rods (10) parallel to the slide rail (19). Support columns (21) are fixedly connected between the two ends of the support rods (10) and the support plate (9).

3. The lithium battery cell external short-circuit test fixture according to claim 1, characterized in that, A support plate (32) is fixedly connected to the inner side wall of the bottom box (3), and a pressure rod (20) is slidably connected to the inner side wall of the support plate (32). The top end of the pressure rod (20) is fixedly connected to the bottom outer wall of the support plate (9), and the bottom end of the pressure rod (20) is fixedly connected to a pressure plate (35) slidably connected to the inner side wall of the bottom box (3). A return spring (38) is fixedly connected between the bottom outer wall of the pressure plate (35) and the bottom inner wall of the bottom box (3), and a pull rope (36) is fixedly connected to the bottom outer wall of the pressure plate (35).

4. The lithium battery cell external short-circuit test fixture according to claim 3, characterized in that, The negative pressure mechanism includes a telescopic hose (17) inserted into the outer wall of one side of the fixed suction shell (27), and the other end of the telescopic hose (17) is inserted into the outer wall of the side of the bottom box (3). The end of the telescopic hose (17) is located above the air pressure plate (35). The top outer wall of the air pressure plate (35) has an air inlet groove (37), and the inner wall of the side of the air inlet groove (37) is rotatably connected to an air inlet baffle (34) that can be folded down.

5. The lithium battery cell external short-circuit test fixture according to claim 4, characterized in that, The outer side wall of the bottom box (3) has a frame groove, and a filter frame (2) is slidably connected to the inner side wall of the frame groove. A dust filter (33) is fixedly connected to the inner side wall of the filter frame (2). The filter frame (2) is located between one end of the air pressure plate (35) and the telescopic hose (17).

6. The external short-circuit test fixture for a lithium battery cell according to claim 1, characterized in that, The top outer wall of the outer frame (14) is hinged with connecting rods (13) on both sides, and the side outer wall of the support column (21) is fixedly connected with a slide (12), and the other end of the connecting rod (13) is hinged to the side outer wall of the slide (12).

7. The lithium battery cell external short-circuit test fixture according to claim 1, characterized in that, The top outer wall of the outer frame (14) is hinged with connecting rods (13) on both sides, and the side outer wall of the support column (21) is fixedly connected with a slide (12). The side outer wall of the slide (12) is slidably connected with a slider (11). The side outer wall of the slider (11) is connected with a locking button (22) by a thread. The other end of the connecting rod (13) is hinged to the side outer wall of the slider (11).

8. A lithium battery cell external short-circuit test fixture according to claim 6 or 7, characterized in that, The outer side wall of the slide (12) is fixedly connected to an outer shell (8), the inner side wall of the outer shell (8) is slidably connected to an inner rod (7), the other end of the inner rod (7) is fixedly connected to a fixing block (23), the outer side wall of the outer frame (14) is fixedly connected to a vertical slide rail (24), the fixing block (23) slides up and down along the vertical slide rail (24), the outer side wall and bottom outer wall of the fixing block (23) are both fixedly connected to a toothed belt (25), the outer side wall of the rotating suction shell (29) is fixedly connected to a toothed ring (26), and the toothed belt (25) meshes with the toothed ring (26).

Images