Explosion-proof pressure detection device for lithium battery cap

Abstract

The utility model provides a lithium battery cap explosion-proof pressure detection device which comprises a workbench, a cap body, a fixing plate, a high-pressure pump and a rotating ring, the rotating ring is rotatably arranged on the workbench, a driving assembly for driving the rotating ring to rotate is arranged on the workbench, and a plurality of fixing tools are fixedly installed on the rotating ring at intervals in the circumference direction of the rotating ring. A containing groove is formed in the fixing tool, a monitoring assembly for monitoring a cap body in the containing groove is arranged on the fixing tool, an air cylinder is fixedly installed on the portion, opposite to the fixing tool, of the fixing plate, a pressing column capable of being embedded into the containing groove is fixedly installed at the telescopic end of the air cylinder, and a channel is formed in the pressing column in a penetrating mode. And the high-pressure pump is communicated with the channel through a communicating pipeline. The explosion-proof pressure detection device for the lithium battery cap can play a role in realizing continuous detection of the lithium battery cap and improving the detection efficiency.

Description

A lithium battery cap explosion-proof pressure detection device Technical Field

[0001] This utility model relates to the field of lithium battery cap testing technology, and more specifically, to a lithium battery cap explosion-proof pressure testing device. Background Technology

[0002] With the rapid development of technology, lithium batteries have been widely used in many fields such as consumer electronics, electric vehicles, and energy storage systems due to their significant advantages such as high energy density, long cycle life, and no memory effect. However, as the number of lithium batteries used and the application scenarios continue to expand, their safety issues have gradually attracted high attention from all sectors of society. During the use of lithium batteries, when the internal pressure exceeds the limit that the lithium battery cap can withstand, it may cause serious safety accidents such as battery fire and explosion, causing huge losses to personal safety and property. Therefore, explosion-proof pressure testing is carried out on the caps of lithium batteries during production. However, the existing lithium battery cap explosion-proof pressure testing devices have low testing efficiency and cannot observe the explosion-proof pressure test situation in real time, which affects the data recording.

[0003] To address the aforementioned issues, existing lithium battery cap explosion-proof pressure testing devices suffer from low testing efficiency and the inability to immediately observe the explosion-proof pressure test results, affecting data recording. Extensive research revealed a lithium battery cap explosion-proof pressure testing device with patent publication number CN222545154U, belonging to the field of lithium battery cap testing technology. This device involves placing the lithium battery cap into a test port, where a hydraulic cylinder pushes a sealing plate to connect with the test plate, sealing the inside of the test port. A high-pressure pump then pressurizes the inside of the test port, gradually increasing pressure for rapid testing. When the lithium battery cap deforms, the resulting outward bulge pushes against a linkage head, causing the linkage head to push a corresponding movable rod downwards, thus promptly determining if the lithium battery cap has burst.

[0004] However, the aforementioned lithium battery cap explosion-proof pressure testing device still has some problems. For example, when testing a large number of lithium battery caps, the device needs to frequently replace the lithium battery caps inside the test port to achieve the testing of multiple lithium battery caps, resulting in low overall testing efficiency. To address the above problems, this utility model proposes a lithium battery cap explosion-proof pressure testing device. Summary of the Invention

[0005] The present invention aims to solve the technical problems mentioned in the background art and provide a lithium battery cap explosion-proof pressure detection device.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a lithium battery cap explosion-proof pressure detection device, comprising a workbench, a cap body, a fixing plate, and a high-pressure pump, a rotating ring rotatably mounted on the workbench, a driving assembly for driving the rotating ring to rotate on the workbench, multiple fixing fixtures fixedly mounted at intervals along the circumference of the rotating ring, each fixing fixture having a placement groove, a monitoring assembly for monitoring the cap body within the placement groove on the fixing fixture, a cylinder fixedly mounted on the fixing plate relative to the fixing fixture, a clamping column fixedly mounted at the telescopic end of the cylinder for embedding into the placement groove, a channel penetrating the clamping column, and the high-pressure pump connected to the channel via a connecting pipe.

[0007] A further preferred embodiment: the monitoring component includes:

[0008] A movable plate is movably disposed within the fixed fixture, and the fixed fixture is provided with a movable groove for the movable plate to move within it.

[0009] An L-shaped rod is inserted through and fixedly installed on the movable plate. The L-shaped rod is inserted through and movably disposed on the fixed fixture. One end of the L-shaped rod extends into the placement groove and fits against the bottom of the cap body, while the other end extends outside the fixed fixture.

[0010] Two sets of first springs are sleeved opposite each other on the L-shaped rod along the movable plate, and the two sets of first springs are located in the movable groove.

[0011] A further preferred embodiment: the movable plate has a polygonal structure.

[0012] A further preferred embodiment: an arc-shaped mounting plate is fixedly connected between the fixed fixture and the rotating ring; an alarm component is fixedly mounted on the worktable relative to the clamping column; the alarm component includes:

[0013] An installation block is fixedly installed on the workbench. A limit plate is movably connected inside the installation block. A limit groove is provided inside the installation block for the limit plate to move. A push switch is provided on the bottom wall of the limit groove. An alarm is fixedly installed on the installation block and is signal-connected to the push switch.

[0014] The movable rod has one end fixedly installed on the side of the limiting plate away from the push switch, and the other end extends to the outside of the mounting block and is fixedly installed with an abutment block. The movable rod passes through and is movably disposed on the mounting block.

[0015] A second spring is sleeved on the movable rod, and its two ends abut against the mounting block and the contact block, respectively.

[0016] A further preferred embodiment: a second sealing gasket with an annular structure is fixedly installed in the placement groove, the second sealing gasket can fit against the bottom of the cap body, and a third sealing gasket that can fit against the top of the cap body is fixedly installed at the bottom of the pressing column.

[0017] A further preferred embodiment: A contact plate that can abut against the L-shaped rod is fixedly installed on the workbench adjacent to the alarm component. The contact plate is an arc-shaped structure coaxial with the rotating ring. The contact plate is provided with an arc-shaped inclined end face that slopes from bottom to top along the rotation direction of the rotating ring. The alarm component and the contact plate are arranged sequentially on the workbench along the rotation direction of the rotating ring.

[0018] A further preferred embodiment: the abutment block is an arc-shaped structure coaxial with the rotating ring, and the movable rod is a polygonal structure.

[0019] A further preferred embodiment: a fixed ring with an annular structure is fixedly installed on the top of the fixed fixture, and an abutment ring is sleeved and fixedly installed on the clamping column relative to the fixed ring. The fixed ring and the abutment ring can fit together, and a first sealing gasket is fixedly installed on the connecting end face of the fixed ring and the abutment ring.

[0020] A further preferred embodiment: the driving component includes:

[0021] Multiple protruding teeth are fixedly installed on the inner wall of the rotating ring, and the multiple protruding teeth are arranged along the circumference of the rotating ring.

[0022] A rotating shaft passes through and is rotatably mounted on the worktable. A drive gear that can mesh with multiple convex teeth is sleeved and fixedly installed on the rotating shaft. A grooved wheel intermittent transmission mechanism that drives the rotating shaft to rotate intermittently is provided at the bottom of the worktable.

[0023] A further preferred embodiment: a rotating ring is fixedly connected to the bottom of the rotating ring, and a rotating groove is provided on the worktable for the rotating ring to rotate.

[0024] Beneficial effects:

[0025] 1. By setting up a rotating ring, fixed fixtures, clamping column, and monitoring components, the monitoring components monitor the cap body in the placement slot to determine whether the cap body meets the standard. The overall operation steps are simple. With the help of the rotating ring and multiple fixed fixtures, continuous detection of lithium battery caps can be achieved, improving detection efficiency.

[0026] 2. Equipped with an alarm component, the system can promptly issue an alarm when the cap body's inspection structure fails to meet standards, alerting operators to pay attention and promptly remove substandard products.

[0027] 3. With the abutment plate provided, when the fixed fixture is rotated by the rotating ring, the L-shaped rod gradually contacts the arc-shaped inclined end face of the abutment plate. As the rotating ring rotates, the L-shaped rod moves upward along the arc-shaped inclined end face, thereby pushing out the cap body in the placement slot, so that the staff can pick up and put down the cap body. Attached Figure Description

[0028] Figure 1 is a schematic diagram of the overall structure of this utility model.

[0029] Figure 2 is a front view of this utility model.

[0030] Figure 3 is a schematic diagram of the rotating ring and rotating groove of this utility model.

[0031] Figure 4 is a schematic diagram of the placement groove of this utility model.

[0032] Figure 5 is a schematic diagram of the structure of the monitoring component of this utility model.

[0033] Figure 6 is a schematic diagram of the structure of the contact ring of this utility model.

[0034] Figure 7 is a structural schematic diagram of the present invention from another perspective of Figure 6.

[0035] Figure 8 is a structural schematic diagram of the alarm component of this utility model.

[0036] In Figure 1-8: 1. Workbench; 2. Rotating ring; 3. Fixed plate; 4. High-pressure pump; 5. Fixed fixture; 6. Clamping column; 7. Alarm assembly; 71. Mounting block; 72. Alarm; 73. Contact block; 74. Movable rod; 75. Second spring; 76. Limit plate; 77. Limit groove; 78. Push switch; 8. Monitoring assembly; 81. L-shaped rod; 82. Movable plate; 83. Movable groove; 84. First spring; 9. Drive. Components; 91. Drive gear; 92. Rotating shaft; 93. Intermittent transmission mechanism of Geneva wheel; 94. Convex tooth; 10. Abutment plate; 11. Arc-shaped inclined end face; 12. Cylinder; 13. Connecting pipe; 14. Mounting plate; 15. Rotating plate; 16. Rotating groove; 17. Cap body; 18. Placement groove; 19. Fixing ring; 20. First sealing gasket; 21. Second sealing gasket; 22. Abutment ring; 23. Channel; 24. Third sealing gasket. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to Figures 1-8 in the embodiments of the present invention.

[0038] Please refer to Figures 1-8. In this embodiment of the present invention, a lithium battery cap explosion-proof pressure detection device includes a workbench 1, a cap body 17, a fixing plate 3, and a high-pressure pump 4. A rotating ring 2 is rotatably mounted on the workbench 1. The workbench 1 is provided with a driving component 9 for driving the rotating ring 2 to rotate. Multiple fixing fixtures 5 are fixedly installed at intervals along the circumference of the rotating ring 2. The fixing fixtures 5 are provided with placement grooves 18. The fixing fixtures 5 are provided with a monitoring component 8 for monitoring the cap body 17 in the placement grooves 18. A cylinder 12 is fixedly mounted on the fixing plate 3 relative to the fixing fixtures 5. A clamping column 6 that can be embedded in the placement groove 18 is fixedly mounted on the telescopic end of the cylinder 12. A channel 23 is provided through the clamping column 6. The high-pressure pump 4 is connected to the channel 23 through a connecting pipe 13.

[0039] Specifically, in this embodiment, the mounting plate 14 is fixedly mounted on the workbench 1, and the high-pressure pump 4 is fixedly mounted on the top of the mounting plate 14. When inspecting the cap body 17, the cap body 17 is placed in the placement groove 18 of the fixing fixture 5, and then the rotating ring 2 is rotated by the drive component 9, so that the fixing fixture 5 reaches the bottom of the clamping column 6 in sequence. The cylinder 12 on the fixing plate 3 extends, allowing the clamping column 6 to be embedded in the placement groove 18, thus fixing the cap body 17 and forming a sealed state between the clamping column 6, the cap body 17, and the fixing fixture 5. At this time, the channel 23 is set directly in front of the center of the cap body 17. Then, the high-pressure pump 4 is started, and the high-pressure pump 4 applies pressure to the cap body 17 through the connecting pipe 13 and the channel 23. The monitoring component 8 monitors the cap body 17 in the placement groove 18 to determine whether the cap body 17 meets the standard. The overall operation steps are simple. With the help of the rotating ring 2 and the setting of multiple fixing fixtures 5, continuous inspection of lithium battery caps can be achieved, improving inspection efficiency.

[0040] It should be noted that the drive component 9 is a mechanism capable of rotating the rotating ring 2. For example, it can be achieved by installing a rod inside the rotating ring 2 and driving the rod with a motor to rotate the rotating ring 2 (at this time, the mounting plate 14 is installed on the workbench 1 outside the rotating ring 2). Of course, other structures are also possible, and no restrictions are placed here. Secondly, in this embodiment, the installation method and working principle of the high-pressure pump 4 and the cylinder 12 are existing technologies, and they can be controlled by external control equipment, which will not be described here. Furthermore, in this embodiment, the monitoring component 8 can also refer to the publication document with patent publication number CN222545154U.

[0041] In this embodiment of the utility model, as shown in Figures 1, 2, 3, 4, and 5, the monitoring component 8 includes a movable plate 82, which is movably disposed within a fixed fixture 5. The fixed fixture 5 has a movable groove 83 for the movable plate 82 to move within. An L-shaped rod 81 passes through and is fixedly mounted on the movable plate 82. The L-shaped rod 81 passes through and is movably disposed on the fixed fixture 5. One end of the L-shaped rod 81 extends into the placement groove 18 and fits against the bottom of the cap body 17, while the other end extends outside the fixed fixture 5. Two sets of first springs 84 are sleeved opposite each other along the movable plate 82 on the L-shaped... On rod 81, two sets of first springs 84 are located in movable groove 83. Specifically, when the cap body 17 deforms or breaks during testing, under the continuous air pressure of high-pressure pump 4, the L-shaped rod 81 and movable plate 82 will move downward in movable groove 83, causing the first springs 84 to deform. The operator can judge whether the cap body 17 meets the standard by observing the displacement of the L-shaped rod 81. When the L-shaped rod 81 does not move, it means that the cap body 17 meets the standard. When the L-shaped rod 81 moves, it means that the cap body 17 does not meet the standard, thereby improving the testing quality and efficiency.

[0042] In this embodiment of the utility model, as shown in Figure 5, the movable plate 82 has a polygonal structure. Specifically, the polygonal structure can prevent the movable plate 82 and the L-shaped rod 81 from rotating during the movement, ensuring the stability and accuracy of the monitoring component 8. Secondly, the movable plate 82 and the movable groove 83 are fitted together to ensure the overall sealing.

[0043] In this embodiment of the utility model, as shown in Figures 1, 2, 3, and 8, an arc-shaped mounting plate 14 is fixedly connected between the fixed fixture 5 and the rotating ring 2. An alarm component 7 is fixedly installed on the workbench 1 relative to the clamping column 6. The alarm component 7 includes a mounting block 71, which is fixedly installed on the workbench 1. A limit plate 76 is movably connected inside the mounting block 71. A limit groove 77 is provided inside the mounting block 71, allowing the limit plate 76 to move. A push switch 78 is provided on the bottom wall of the limit groove 77. An alarm 72, which is signal-connected to the push switch 78, is fixedly installed on the mounting block 71. A movable rod 74 is fixedly installed at one end on the side of the limit plate 76 away from the push switch 78, and at the other end extends to the outside of the mounting block 71 and is fixedly installed with an abutment block 73. The movable rod 74 passes through and is movably disposed on the mounting block 71. A second spring 75 is sleeved on the movable rod 74. 4. The two ends of the second spring 75 abut against the mounting block 71 and the contact block 73, respectively. Specifically, when the L-shaped rod 81 moves and abuts against the contact block 73, it pushes the movable rod 74 into the mounting block 71. The movable rod 74 drives the limiting plate 76 to move in the limiting groove 77 and press the push switch 78. The push switch 78 triggers the alarm 72 to sound an alarm. At the same time, the second spring 75 deforms when the movable rod 74 moves. When the L-shaped rod 81 no longer abuts against the contact block 73, the second spring 75 resets the movable rod 74 to ensure the subsequent use of the alarm device. The alarm component 7 can promptly sound an alarm when the structure of the cap body 17 is found to be substandard, reminding the operator to pay attention and promptly clean up the defective products. It should be noted that the wiring connection and working principle of the alarm 72 and the push switch 78 are existing technologies and will not be described here.

[0044] In this embodiment of the present invention, as shown in Figures 4, 5 and 7, a second sealing gasket 21 with an annular structure is fixedly installed in the placement groove 18. The second sealing gasket 21 can fit against the bottom of the cap body 17. A third sealing gasket 24 that can fit against the top of the cap body 17 is fixedly installed at the bottom of the pressing column 6. Specifically, the second sealing gasket 21 and the third sealing gasket 24 can enhance the sealing between the cap body 17, the placement groove 18 and the pressing column 6, prevent pressure leakage and ensure the accuracy of the test results.

[0045] In this embodiment of the present invention, as shown in Figures 1, 2, and 3, a contact plate 10 is fixedly installed on the workbench 1 adjacent to the alarm component 7, which can abut against the L-shaped rod 81. The contact plate 10 is an arc-shaped structure coaxial with the rotating ring 2, and the contact plate 10 is provided with an arc-shaped inclined end face 11 that slopes from bottom to top along the rotation direction of the rotating ring 2. The alarm component 7 and the contact plate 10 are sequentially arranged on the workbench 1 along the rotation direction of the rotating ring 2. Specifically, when the rotating ring 2 drives the fixed fixture 5 to rotate, the L-shaped rod... L-shaped rod 81 gradually contacts the arc-shaped inclined end face 11 of the contact plate 10. As the rotating ring 2 rotates, L-shaped rod 81 moves upward along the arc-shaped inclined end face 11, thereby pushing out the cap body 17 in the placement slot 18, so that the staff can pick up and put away the cap body 17. At the same time, when L-shaped rod 81 moves, L-shaped rod 81 will drive the movable plate 82 to squeeze the first spring 84. When L-shaped rod 81 is separated from the contact plate 10, it can be reset under the action of the first spring 84, so as to facilitate subsequent operations.

[0046] In this embodiment of the present invention, as shown in Figures 1, 2, 3 and 8, the contact block 73 is an arc-shaped structure coaxial with the rotating ring 2, and the movable rod 74 is a polygonal structure.

[0047] In this embodiment of the present invention, as shown in Figures 4, 5, 6, and 7, a fixed ring 19 with an annular structure is fixedly installed on the top of the fixed fixture 5. An abutment ring 22 is sleeved and fixedly installed on the clamping column 6 relative to the fixed ring 19. The fixed ring 19 and the abutment ring 22 can fit together, and a first sealing gasket 20 is fixedly installed on the connecting end face of the fixed ring 19 and the abutment ring 22. Specifically, when the cylinder pushes the clamping column 6 down, the abutment ring 22 fits with the fixed ring 19, and the first sealing gasket 20 further enhances the sealing between the two. Through the setting of the fixed ring 19, the abutment ring 22, and the first sealing gasket 20, the sealing performance of the device is further improved, the possibility of pressure leakage is reduced, and the reliability of detection is improved.

[0048] In this embodiment of the present invention, as shown in Figures 1, 2, and 3, the drive assembly 9 includes multiple protruding teeth 94, which are fixedly installed on the inner wall of the rotating ring 2. The multiple protruding teeth 94 are arranged along the circumference of the rotating ring 2. A rotating shaft 92 is rotatably mounted on the worktable 1, and a drive gear 91 that can mesh with the multiple protruding teeth 94 is sleeved and fixedly installed on the rotating shaft 92. The bottom of the worktable 1 is provided with a grooved wheel intermittent transmission mechanism 93 for intermittently driving the rotating shaft 92. A rotating plate 15 is fixedly connected to the bottom of the rotating ring 2. The worktable 1 is provided with a rotating groove 16 for the rotating ring 2 to rotate. Specifically, the grooved wheel intermittent transmission mechanism 93 is controlled by an external device to drive the rotating shaft 92 to rotate intermittently. The rotating shaft 92 drives the drive gear 91 to rotate, and the drive gear 91 meshes with the protruding teeth 94 on the inner wall of the rotating ring 2, thereby causing the rotating ring 2 to rotate intermittently. The intermittent rotation of the rotating ring 2 can be achieved through the Geneva wheel intermittent transmission mechanism 93, so that the fixed fixture 5 can be accurately stopped at the detection position, which facilitates the detection operation and improves the accuracy and efficiency of the detection. It should be noted that the structure and working principle of the Geneva wheel intermittent transmission mechanism 93 are existing technologies, and can also be referred to the publication document with patent publication number CN210889961U, which will not be described here. Of course, in other embodiments, other structures that can drive the rotating shaft 92 to rotate can also be used, such as motors.

[0049] Working principle: First, multiple cap bodies 17 to be tested are placed in the placement slots 18 of the fixing fixtures 5 on the rotating ring 2. Then, the intermittent transmission mechanism 93 of the grooved wheel at the bottom of the workbench 1 is controlled by an external control device to drive the rotating shaft 92 to rotate intermittently. The drive gear 91 on the rotating shaft 92 meshes with multiple protruding teeth 94 on the inner wall of the rotating ring 2, causing the rotating ring 2 to rotate, so that the fixing fixtures 5 rotate sequentially to the bottom of the clamping column 6. At this time, the cylinder 12 on the fixing plate 3 is activated, and the clamping column 6 at the telescopic end of the cylinder 12 moves downward and embeds into the placement slot 18. The third sealing gasket 24 at the bottom of the clamping column 6 is in contact with the top of the cap body 17. In addition, the top of the fixing fixture 5... The fixing ring 19 fits against the abutting ring 22 on the clamping column 6, and the first sealing gasket 20 at the connection end of the two further ensures the seal to prevent gas leakage during pressurization. Then, the high-pressure pump 4 is started. The high-pressure pump 4 applies pressure to the cap body 17 through the connecting pipe 13 and the channel 23. When the cap body 17 deforms or breaks during testing, under the continuous air pressure of the high-pressure pump 4, the L-shaped rod 81 and the movable plate 82 will move downward in the movable groove 83, and the first spring 84 will deform. The operator can judge whether the cap body 17 meets the standard by observing the displacement of the L-shaped rod 81. When the L-shaped rod 81 does not move, it means that the cap body 17 is not up to standard. If the L-shaped rod 81 moves, it indicates that the cap body 17 has not met the standard, thus improving the detection quality and efficiency. When the cap body 17 fails to meet the standard, the L-shaped rod 81 moves and abuts against the abutment block 73, which pushes the movable rod 74 into the mounting block 71. The movable rod 74 drives the limit plate 76 to move within the limit groove 77 and press the press switch 78. The press switch 78 triggers the alarm 72 to sound an alarm. At the same time, the second spring 75 deforms when the movable rod 74 moves. When the L-shaped rod 81 no longer abuts against the abutment block 73, the second spring 75 resets the movable rod 74 to ensure the subsequent use of the alarm device. After the cap body 17 has been detected, The cylinder 12 drives the clamping column 6 to rise and reset. The rotating ring 2 continues to rotate under the action of the drive component 9, rotating the next fixed fixture 5 and the lithium battery cap body 17 in the placement slot 18 to the detection position. After the detection, the cap body 17 moves towards the contact plate 10. At this time, the L-shaped rod 81 gradually contacts the arc-shaped inclined end face 11 of the contact plate 10. As the rotating ring 2 rotates, the L-shaped rod 81 moves upward along the arc-shaped inclined end face 11, thereby pushing the cap body 17 out of the placement slot 18, so that the staff can pick up and put down the cap body 17. Repeat the above steps of clamping, pressurizing, monitoring, and alarming to realize the continuous detection of the explosion-proof pressure of multiple lithium battery caps.

Claims

1. A lithium battery cap explosion-proof pressure detection device, comprising a workbench (1), a cap body (17), a fixing plate (3), and a high-pressure pump (4), characterized in that: A rotating ring (2) is rotatably mounted on the workbench (1). The workbench (1) is provided with a drive assembly (9) for driving the rotating ring (2) to rotate. Multiple fixed fixtures (5) are fixedly installed at intervals along the circumference of the rotating ring (2). The fixed fixtures (5) are provided with a placement groove (18). The fixed fixtures (5) are provided with a monitoring assembly (8) for monitoring the cap body (17) in the placement groove (18). A cylinder (12) is fixedly mounted on the fixed plate (3) relative to the fixed fixtures (5). A clamping column (6) that can be embedded in the placement groove (18) is fixedly mounted on the telescopic end of the cylinder (12). A channel (23) is provided through the clamping column (6). The high-pressure pump (4) is connected to the channel (23) through a connecting pipe (13).

2. The explosion-proof pressure detection device for a lithium battery cap according to claim 1, characterized in that: The monitoring component (8) includes: a movable plate (82) which is movably disposed within the fixed fixture (5), the fixed fixture (5) having a movable groove (83) for the movable plate (82) to move within it; an L-shaped rod (81) which passes through and is fixedly mounted on the movable plate (82), the L-shaped rod (81) passing through and being movably disposed on the fixed fixture (5), one end of the L-shaped rod (81) extending into the placement groove (18) and fitting against the bottom of the cap body (17), and the other end extending to the outside of the fixed fixture (5); and two sets of first springs (84) which are sleeved opposite each other on the L-shaped rod (81) along the movable plate (82), the two sets of first springs (84) being located within the movable groove (83).

3. The explosion-proof pressure detection device for a lithium battery cap according to claim 2, characterized in that: The movable plate (82) has a polygonal structure.

4. The explosion-proof pressure detection device for a lithium battery cap according to claim 2, characterized in that: An arc-shaped mounting plate (14) is fixedly connected between the fixed fixture (5) and the rotating ring (2). An alarm component (7) is fixedly installed on the workbench (1) relative to the clamping column (6). The alarm component (7) includes: a mounting block (71), which is fixedly installed on the workbench (1). A limit plate (76) is movably connected inside the mounting block (71). A limit groove (77) is provided inside the mounting block (71) for the limit plate (76) to move. A push switch (78) is provided on the bottom wall of the limit groove (77). 1) An alarm (72) is fixedly installed on the upper part and is connected to the push switch (78) by signal; a movable rod (74), one end of which is fixedly installed on the side of the limit plate (76) away from the push switch (78), and the other end extends to the outside of the mounting block (71) and is fixedly installed with an abutment block (73), the movable rod (74) passes through and is movably arranged on the mounting block (71); a second spring (75) is sleeved on the movable rod (74), and the two ends of the second spring (75) abut against the mounting block (71) and the abutment block (73) respectively.

5. The explosion-proof pressure detection device for a lithium battery cap according to claim 2, characterized in that: A second sealing gasket (21) with an annular structure is fixedly installed in the placement groove (18). The second sealing gasket (21) can fit against the bottom of the cap body (17). A third sealing gasket (24) that can fit against the top of the cap body (17) is fixedly installed at the bottom of the pressing column (6).

6. The explosion-proof pressure detection device for a lithium battery cap according to claim 4, characterized in that: A contact plate (10) that can abut against the L-shaped rod (81) is fixedly installed on the workbench (1) adjacent to the alarm component (7). The contact plate (10) is an arc-shaped structure coaxial with the rotating ring (2). The contact plate (10) is provided with an arc-shaped inclined end face (11) that is inclined from bottom to top along the rotation direction of the rotating ring (2). The alarm component (7) and the contact plate (10) are arranged sequentially on the workbench (1) along the rotation direction of the rotating ring (2).

7. The explosion-proof pressure detection device for a lithium battery cap according to claim 4, characterized in that: The contact block (73) is an arc-shaped structure coaxial with the rotating ring (2), and the movable rod (74) is a polygonal structure.

8. The explosion-proof pressure detection device for a lithium battery cap according to claim 5, characterized in that: The top of the fixed fixture (5) is fixedly installed with a ring-shaped fixing ring (19). The clamping column (6) is fitted with and fixedly installed with an abutting ring (22) opposite to the fixing ring (19). The fixing ring (19) and the abutting ring (22) can fit together. The connecting end faces of the fixing ring (19) and the abutting ring (22) are both fixedly installed with a first sealing gasket (20).

9. The explosion-proof pressure detection device for a lithium battery cap according to claim 1, characterized in that: The drive assembly (9) includes: a plurality of teeth (94) fixedly installed on the inner wall of the rotating ring (2), the plurality of teeth (94) being arranged along the circumference of the rotating ring (2); a rotating shaft (92) passing through and rotatably mounted on the worktable (1), a drive gear (91) sleeved and fixedly mounted on the rotating shaft and capable of meshing with the plurality of teeth (94), and a grooved wheel intermittent transmission mechanism (93) for intermittently driving the rotating shaft (92) to rotate.

10. The explosion-proof pressure detection device for a lithium battery cap according to claim 9, characterized in that: The bottom of the rotating ring (2) is fixedly connected to a rotating plate (15), and the workbench (1) is provided with a rotating groove (16) for the rotating ring (2) to rotate.

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