A lithium battery pack repair cell detection device

Abstract

The application belongs to the technical field of lithium battery repair detection, and discloses a lithium battery pack repairing battery cell detection device, which comprises a device shell, the front sides of the middle parts of the left and right ends of the device shell are respectively fixedly connected with fixed shafts, and the outer surfaces of the fixed shafts are movably sleeved with round shafts. The gear, lock rod, long rod, first spring and pressing block are arranged, when the transparent supporting plate, round shaft and gear rotate, the gear will extrude the lock rod, force the lock rod to move up with the long rod and compress the first spring, under the restoring action of the first spring, the long rod will take the lock rod back to the original position and re-clamp the gear, at this time, the threaded rod is rotated, the threaded sleeve moves down with the pressing block under the action of the threaded rod, so that the first spring is completely compressed by the pressing block and abuts against the long rod, preventing the long rod and the lock rod from moving up, so that the locking of the transparent supporting plate and the round shaft after rotation can be realized, and the rotation and loosening of the transparent supporting plate and the round shaft can be prevented.

Description

Technical Field

[0001] This invention belongs to the field of lithium battery repair and testing technology, specifically a cell testing device for lithium battery pack repair. Background Technology

[0002] A lithium battery pack is a battery system composed of multiple lithium battery cells connected in series, parallel or mixed to achieve specific voltage, capacity and energy requirements. It has advantages such as high energy density, long cycle life and low self-discharge rate, and is widely used in electric vehicles, energy storage devices, portable electronics and other fields.

[0003] Before repairing lithium battery packs, it is necessary to test parameters such as voltage, current, internal resistance, and temperature of individual cells to identify problematic cells such as those that are aging, undervoltage, or have abnormal internal resistance. Repair is then carried out through methods such as equalization charging and discharging and pulse activation. Cell testing devices are crucial for evaluating individual cell performance and ensuring repair effectiveness, but existing products still have shortcomings: To facilitate operation of the control panel, testing devices are usually equipped with a rotatable U-shaped bracket that, when unfolded, supports the table to form a suitable tilt angle. However, most existing U-shaped brackets lack a reliable locking mechanism, making them prone to accidental rotation or loosening after adjustment, leading to unstable support, tilt angle deviation, and affecting operational stability. There are also safety hazards such as shaking and slipping during the testing process. Therefore, improvements are needed. Summary of the Invention

[0004] The purpose of this invention is to provide a cell testing device for lithium battery pack repair, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A cell testing device for lithium battery pack repair includes a housing. Fixed shafts are fixedly connected to the front sides of the middle of both ends of the housing. Two round shafts are movably sleeved on the outer surfaces of the fixed shafts. Transparent support plates are movably sleeved on the outward-facing sides of the outer surfaces of the two round shafts. Gears are fixedly sleeved on the sides of the outer surfaces of the two round shafts near the housing. A locking rod is movably connected to the top of the outer surface of each gear. The outer surface of the locking rod is movably connected to the outer surface of the housing. A long rod is fixedly connected to the top of the locking rod, and the bottom end of the long rod is movably connected to the top of the housing. An outer frame is movably fitted onto the middle of the outer surface of the long rod. The bottom end of the outer frame is fixedly connected to the top end of the device housing. A pressure block is movably fitted onto the top end of the inner part of the outer frame. First springs are fixedly connected to the left and right sides of the bottom end of the pressure block, respectively. The other end of the first spring is fixedly connected to the top end of the long rod. A threaded sleeve is fixedly connected to the middle of the top end of the pressure block. The outer surface of the threaded sleeve is movably fitted onto the inner surface of the top end of the outer frame. A threaded rod is threaded onto the inner part of the threaded sleeve. The top end of the threaded rod passes through the outer frame and extends to the top of the outer frame, where a first throttle is fixedly connected. The bottom end of the first throttle is movably connected to the top end of the outer frame.

[0006] As a preferred embodiment of the present invention, limiting rods located inside the first spring are fixedly connected to the left and right sides of the top of the inner surface of the outer frame, respectively. The bottom end of the limiting rod passes through the pressure block and the long rod and extends to the top of the device housing. Baffles are movably connected to the left and right ends of the outer frame, and the bottom end of the baffle is fixedly connected to the top end of the long rod.

[0007] As a preferred embodiment of the present invention, there are two transparent support plates, and the middle part of the opposite surfaces of the two transparent support plates are evenly provided with insertion holes, and the insertion blocks located at the top of the transparent support plates are movably sleeved inside the insertion holes.

[0008] In a preferred embodiment of the present invention, a vertical plate is fixedly connected to the outward side of the outer surface of the insert block, the outer surface of the vertical plate and the inner surface of the transparent support plate are movably sleeved together, and a horizontal plate is fixedly connected to the bottom end of the vertical plate. There are two horizontal plates, and a bottom frame is movably sleeved at the near ends of the outer surfaces of the two horizontal plates.

[0009] As a preferred embodiment of the present invention, the two horizontal plates are respectively hinged to the adjacent sides of their top ends with diagonal rods, and the other end of each diagonal rod is hinged to a movable block, wherein the outer surface of the movable block and the middle part of the inner surface of the bottom frame are movably connected.

[0010] In a preferred embodiment of the present invention, a lead screw is threadedly connected to the middle end of the movable block, the bottom end of the lead screw is movably connected to the inner surface of the middle part of the bottom end of the bottom frame, the top end of the lead screw passes through the bottom frame and extends to the outside of the bottom frame and is fixedly connected to a second throttle, the bottom end of the second throttle is movably connected to the top end of the bottom frame.

[0011] As a preferred embodiment of the present invention, limiting grooves are respectively provided on the left and right sides of the bottom of the front and rear ends of the bottom frame, and a limiting block is movably sleeved on the side of the limiting groove near the center of the bottom frame, and the outer surface of the limiting block is fixedly connected to the outer surface of the horizontal plate.

[0012] As a preferred embodiment of the present invention, a rectangular groove is provided on the outward side of the bottom of the outer surface of the circular shaft, and a locking block is movably fitted inside the rectangular groove. The bottom end of the locking block penetrates through the transparent support plate and extends to the inside of the top of the transparent support plate.

[0013] In a preferred embodiment of the present invention, a block is fixedly connected to the bottom end of the card block, the outer surface of the block is movably sleeved with the inner surface of the top of the transparent support plate, a second spring is fixedly connected to the bottom end of the block, and the other end of the second spring is fixedly connected to the inner surface of the transparent support plate.

[0014] The beneficial effects of this invention are as follows: This invention utilizes a gear, locking rod, long rod, first spring, and pressure block. When the transparent support plate, round shaft, and gear rotate, the gear compresses the locking rod, forcing it to move upwards along with the long rod and compress the first spring. Under the restoring action of the first spring, the long rod returns to its original position along with the locking rod, re-locking the gear. At this point, rotating the threaded rod causes the threaded sleeve to move downwards along with the pressure block, thereby completely compressing the first spring and causing it to press against the long rod, preventing the long rod and locking rod from moving upwards. This achieves locking of the transparent support plate and round shaft after rotation, preventing them from rotating back or loosening.

[0015] This invention, by setting up a socket, a plug block, a vertical plate, a horizontal plate, and a diagonal rod, allows the movable block threaded onto the outer surface of the screw to move along with the diagonal rod when the screw rotates. This causes the diagonal rod to exert a thrust on the horizontal plate, pushing the two horizontal plates, along with the vertical plate and the plug block, to move in opposite directions. This causes the plug block and the socket to separate. At this point, pulling the horizontal plate will move the horizontal plate along with the vertical plate, thereby adjusting the length of the transparent support plate. This allows for increasing the elevation angle of the battery cell detection device when the transparent support plate is unfolded at the same angle.

[0016] This invention, by setting up a rectangular groove, a locking block, a square block, and a second spring, allows the screw to continue rotating when the vertical plate is pressed against the inner wall of the outer side of the transparent support plate. This causes the horizontal and vertical plates to continue moving in opposite directions under the action of the diagonal rod and the screw, thereby causing the inner wall of the rectangular groove to press against the locking block. This forces the locking block, along with the square block, to contract inward into the transparent support plate and compress the second spring. When the transparent support plates on both sides and the round shaft are completely separated, the entire transparent support plate can be disassembled for easy replacement. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the front of the transparent support plate of the present invention; Figure 3 This is a schematic cross-sectional view of the side of the transparent support plate of the present invention; Figure 4 for Figure 2 A magnified schematic diagram of the partial structure at point A in the middle; Figure 5 for Figure 2 A magnified view of the structure at point B in the middle; Figure 6 for Figure 2 A magnified schematic diagram of the local structure at point C; Figure 7 for Figure 2 A magnified schematic diagram of the local structure at point D; Figure 8 for Figure 3 A magnified schematic diagram of the structure at point E in the middle.

[0018] In the diagram: 1. Device housing; 2. Fixed shaft; 3. Round shaft; 4. Transparent support plate; 5. Gear; 6. Locking rod; 7. Long rod; 8. Outer frame; 9. First spring; 10. Pressure block; 11. Threaded sleeve; 12. Threaded rod; 13. First throttle; 14. Limiting rod; 15. Baffle; 16. Insertion hole; 17. Insertion block; 18. Vertical plate; 19. Horizontal plate; 20. Base frame; 21. Diagonal rod; 22. Movable block; 23. Lead screw; 24. Second throttle; 25. Limiting groove; 26. Limiting block; 27. Rectangular groove; 28. Locking block; 29. ​​Square block; 30. Second spring. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1 to 8As shown, this embodiment of the invention provides a cell testing device for lithium battery pack repair, including a device housing 1. Fixed shafts 2 are fixedly connected to the front sides of the middle of the left and right ends of the device housing 1. Two round shafts 3 are movably sleeved on the outer surface of the fixed shafts 2. Transparent support plates 4 are movably sleeved on the outward-facing sides of the outer surfaces of the two round shafts 3. Gears 5 are fixedly sleeved on the sides of the outer surfaces of the two round shafts 3 near the device housing 1. A locking rod 6 is movably connected to the top of the outer surface of the gear 5. The outer surface of the locking rod 6 is movably connected to the outer surface of the device housing 1. A long rod 7 is fixedly connected to the top of the locking rod 6. The bottom end of the long rod 7 is movably connected to the top end of the device housing 1. An outer frame 8 is movably sleeved on the middle of the outer surface of the rod 7. The bottom end of the outer frame 8 is fixedly connected to the top end of the device housing 1. A pressure block 10 is movably sleeved on the top end of the inner side of the outer frame 8. A first spring 9 is fixedly connected to the left and right sides of the bottom end of the pressure block 10. The other end of the first spring 9 is fixedly connected to the top end of the long rod 7. A threaded sleeve 11 is fixedly connected to the middle of the top end of the pressure block 10. The outer surface of the threaded sleeve 11 is movably sleeved on the inner surface of the top end of the outer frame 8. A threaded rod 12 is threadedly sleeved inside the threaded sleeve 11. The top end of the threaded rod 12 passes through the outer frame 8 and extends to the top of the outer frame 8 and is fixedly connected to a first throttle 13. The bottom end of the first throttle 13 is movably connected to the top end of the outer frame 8.

[0021] When the transparent support plate 4 drives the round shaft 3 and gear 5 to rotate along the outer surface of the fixed shaft 2, the teeth on the outer surface of the gear 5 will squeeze the locking rod 6, causing the locking rod 6 to move upward with the long rod 7 and compress the first spring 9. Under the restoring action of the first spring 9, when the transparent support plate 4, round shaft 3, and gear 5 stop rotating, the long rod 7 will bring the locking rod 6 back to its original position, so that the locking rod 6 will lock the gear 5 again. At this time, turn the first throttle 13 to make the threaded rod 12 rotate, so that the threaded sleeve 11 threadedly connected to the threaded rod 12 moves towards the long rod 7 with the pressure block 10, thereby completely compressing the first spring 9 to press against the long rod 7, completing the locking of the long rod 7 and the locking rod 6, thus realizing the locking of the round shaft 3 and the transparent support plate 4 after rotation.

[0022] Among them, the left and right sides of the top of the inner surface of the outer frame 8 are respectively fixedly connected to the limiting rod 14 located inside the first spring 9. The bottom end of the limiting rod 14 passes through the pressure block 10 and the long rod 7 and extends to the top of the device housing 1. The left and right ends of the outer frame 8 are respectively movably connected to the baffle 15. The bottom end of the baffle 15 and the top end of the long rod 7 are fixedly connected.

[0023] The presence of the limiting rod 14 will limit the movement of the long rod 7 and the pressure block 10, while the presence of the baffle 15 can prevent foreign objects from entering the cavity where the first spring 9 is located.

[0024] The transparent support plate 4 consists of two plates, each with a uniformly spaced insertion hole 16 on its opposite side. An insertion block 17 is movably fitted inside each insertion hole 16 located at the top of the transparent support plate 4. The insertion holes 16 are arranged linearly at equal intervals on the outer surface of the transparent support plate 4, and all insertion holes 16 are identical in shape and size. The transparent support plate 4, made of transparent material, facilitates observation of the position of the insertion block 17.

[0025] Among them, a vertical plate 18 is fixedly connected to the outer side of the outer surface of the insert 17. The outer surface of the vertical plate 18 and the inner surface of the transparent support plate 4 are movably connected. A horizontal plate 19 is fixedly connected to the bottom end of the vertical plate 18. There are two horizontal plates 19. The bottom frame 20 is movably connected to the near ends of the outer surfaces of the two horizontal plates 19.

[0026] The outer surface of the vertical plate 18 and the inner surface of the transparent support plate 4 are both smooth, so that the vertical plate 18 will not get stuck when it moves along the inner surface of the transparent support plate 4.

[0027] Two horizontal plates 19 are respectively hinged to the adjacent sides of their top ends with diagonal rods 21, and the other end of the diagonal rods 21 is hinged to a movable block 22. The outer surface of the movable block 22 and the middle part of the inner surface of the bottom frame 20 are movably connected.

[0028] When the movable block 22 moves along the inner walls of the front and rear sides of the bottom frame 20, it will move the top end of the diagonal rod 21 together, so that the other end of the diagonal rod 21 will generate a pushing force on the horizontal plate 19, pushing the two horizontal plates 19 to move in opposite directions.

[0029] The middle end of the movable block 22 is threaded with a lead screw 23. The bottom end of the lead screw 23 is movably connected to the inner surface of the middle part of the bottom end of the bottom frame 20. The top end of the lead screw 23 passes through the bottom frame 20 and extends to the outside of the bottom frame 20 and is fixedly connected to a second throttle 24. The bottom end of the second throttle 24 is movably connected to the top end of the bottom frame 20.

[0030] When the second throttle 24 is turned, the lead screw 23 will rotate. Since the outer surface of the lead screw 23 and the inner surface of the movable block 22 are threaded together, the movable block 22 will move along the inner walls of the front and rear sides of the bottom frame 20 under the action of the threads.

[0031] Limiting grooves 25 are respectively opened on the left and right sides of the bottom of the front and rear ends of the bottom frame 20. A limiting block 26 is movably sleeved on the side of the limiting groove 25 near the center of the bottom frame 20. The outer surface of the limiting block 26 is fixedly connected to the outer surface of the horizontal plate 19.

[0032] The presence of the limiting groove 25 and the limiting block 26 will limit the movement of the horizontal plate 19, thereby ensuring the stability of the movement of the horizontal plate 19.

[0033] A rectangular groove 27 is provided on the outer side of the bottom of the outer surface of the round shaft 3. A locking block 28 is movably fitted inside the rectangular groove 27. The bottom end of the locking block 28 passes through the transparent support plate 4 and extends to the inside of the top of the transparent support plate 4.

[0034] The top of the left and right ends of the card block 28 is a slope, and the front and rear ends are flat and fit against the inner walls of the front and rear sides of the rectangular groove 27.

[0035] A block 29 is fixedly connected to the bottom of the locking block 28. The outer surface of the block 29 is movably connected to the inner surface of the top of the transparent support plate 4. A second spring 30 is fixedly connected to the bottom of the block 29. The other end of the second spring 30 is fixedly connected to the inner surface of the transparent support plate 4.

[0036] When the second spring 30 is in a compressed state, it will exert an upward force on the block 29 under the restoring action of the second spring 30.

[0037] During cell testing, the operator first rotates the transparent support plate 4 to the required angle. As the transparent support plate 4 rotates, the gear 5 rotates along with it, causing the teeth on the outer surface of the gear 5 to press against the locking rod 6. This forces the locking rod 6, along with the long rod 7, to move upwards and compress the first spring 9. When the transparent support plate 4 stops rotating, the long rod 7, along with the locking rod 6, returns to its original position under the restoring action of the first spring 9. This causes the locking rod 6 to re-lock the gear 5. At this point, the operator turns the first throttle 13, causing the threaded rod 12 to rotate. This causes the threaded sleeve 11, which is threadedly connected to the threaded rod 12, to move along the inner surface of the outer frame 8 towards the long rod 7, compressing the first spring 9. This continues until the first spring 9 is fully compressed and presses against the long rod 7, preventing the long rod 7 and the locking rod 6 from moving. This keeps the locking rod 6 and the gear 5 locked, thus preventing the transparent support plate 4 from rotating or loosening during subsequent cell testing.

[0038] When the transparent support plate 4 is restricted from rotating and the elevation angle of the detection device is insufficient, the operator turns the second lever 24 to rotate the lead screw 23. This causes the movable block 22, which is threaded onto the lead screw 23, to move along the inner surface of the bottom frame 20 with one end of the inclined rod 21. This causes the other end of the inclined rod 21 to exert a pushing force on the horizontal plate 19, pushing the two horizontal plates 19 to move in opposite directions with the vertical plate 18 and the insertion block 17, until the insertion block 17 separates from the insertion hole 16. Then, the operator can pull the horizontal plate 19 to move the vertical plate 18 with the insertion block 17 along the inner surface of the transparent support plate 4 to extend the transparent support plate 4. After the transparent support plate 4 is extended to the required length, the lead screw 23 is rotated in the opposite direction to reset the movable block 22, the horizontal plate 19, the vertical plate 18, and the insertion block 17 until the insertion block 17 is inserted into the corresponding insertion hole 16. In this way, the elevation angle of the battery cell detection device can be increased without rotating the transparent support plate 4.

[0039] When the transparent support plate 4 needs to be disassembled, the operator turns the second handle 24 until the vertical plate 18 is in contact with the outer inner wall of the transparent support plate 4 under the action of the lead screw 23, movable block 22, diagonal rod 21, and horizontal plate 19. At this time, continue to turn the second handle 24 to force the vertical plate 18 to move outward with the transparent support plate 4. During the outward movement of the transparent support plate 4, the inner wall of the rectangular groove 27 will squeeze the locking block 28, forcing the locking block 28 to contract inward with the square block 29 and compress the second spring 30. When the transparent support plate 4 and the round shaft 3 are completely separated, the transparent support plate 4 can be disassembled. At the same time, due to the tilted design of the locking block 28 on both sides, the transparent support plate 4 can be reinstalled by simply turning the second handle 24 in the opposite direction to make the vertical plate 18 and the transparent support plate 4 move in opposite directions.

Claims

1. A cell testing device for lithium battery pack repair, comprising a device housing (1), characterized in that: Fixed shafts (2) are fixedly connected to the front sides of the middle of the left and right ends of the device housing (1). Round shafts (3) are movably sleeved on the outer surface of the fixed shafts (2). There are two round shafts (3). Transparent support plates (4) are movably sleeved on the outward side of the outer surface of the two round shafts (3). Gears (5) are fixedly sleeved on the side of the outer surface of the two round shafts (3) close to the device housing (1). Locking rods (6) are movably connected to the top of the outer surface of the gears (5). The outer surface of the locking rods (6) is movably connected to the outer surface of the device housing (1). A long rod (7) is fixedly connected to the top of the locking rods (6). The bottom end of the long rod (7) is movably connected to the top of the device housing (1). An outer frame (8) is movably sleeved on the middle of the outer surface of the long rod (7). The bottom end of the outer frame (8) is fixedly connected to the top end of the device housing (1). A pressure block (10) is movably sleeved on the top end inside the outer frame (8). A first spring (9) is fixedly connected to the left and right sides of the bottom end of the pressure block (10). The other end of the first spring (9) is fixedly connected to the top end of the long rod (7). A threaded sleeve (11) is fixedly connected to the middle of the top end of the pressure block (10). The outer surface of the threaded sleeve (11) is movably sleeved with the inner surface of the top end of the outer frame (8). A threaded rod (12) is threaded inside the threaded sleeve (11). The top end of the threaded rod (12) passes through the outer frame (8) and extends to the top of the outer frame (8) and is fixedly connected with a first throttle (13). The bottom end of the first throttle (13) is movably connected to the top end of the outer frame (8).

2. The cell testing device for lithium battery pack repair according to claim 1, characterized in that: On the left and right sides of the top of the inner surface of the outer frame (8), a limiting rod (14) located inside the first spring (9) is fixedly connected. The bottom end of the limiting rod (14) passes through the pressure block (10) and the long rod (7) and extends to the top of the device housing (1). The left and right ends of the outer frame (8) are movably connected to baffles (15). The bottom end of the baffle (15) and the top end of the long rod (7) are fixedly connected.

3. The cell testing device for lithium battery pack repair according to claim 1, characterized in that: There are two transparent support plates (4). The middle part of the opposite face of the two transparent support plates (4) is evenly provided with insertion holes (16). The insertion holes (16) are movably fitted with insertion blocks (17) located on the top of the transparent support plates (4).

4. The cell testing device for lithium battery pack repair according to claim 3, characterized in that: A vertical plate (18) is fixedly connected to the outer side of the outer surface of the insert (17). The outer surface of the vertical plate (18) and the inner surface of the transparent support plate (4) are movably connected. A horizontal plate (19) is fixedly connected to the bottom end of the vertical plate (18). There are two horizontal plates (19). The bottom frames (20) are movably connected to the near ends of the outer surfaces of the two horizontal plates (19).

5. The cell testing device for lithium battery pack repair according to claim 4, characterized in that: Two horizontal plates (19) are respectively hinged to the adjacent sides of their top ends with diagonal rods (21), and the other end of the diagonal rods (21) is hinged to a movable block (22). The outer surface of the movable block (22) and the middle part of the inner surface of the bottom frame (20) are movably connected.

6. The cell testing device for lithium battery pack repair according to claim 5, characterized in that: The movable block (22) is threaded with a lead screw (23) at its middle end. The bottom end of the lead screw (23) is movably connected to the inner surface of the middle part of the bottom end of the bottom frame (20). The top end of the lead screw (23) passes through the bottom frame (20) and extends to the outside of the bottom frame (20) and is fixedly connected to a second throttle (24). The bottom end of the second throttle (24) is movably connected to the top end of the bottom frame (20).

7. The cell testing device for lithium battery pack repair according to claim 4, characterized in that: Limiting grooves (25) are respectively opened on the left and right sides of the bottom of the front and rear ends of the bottom frame (20). A limiting block (26) is movably sleeved on the side of the limiting groove (25) near the center of the bottom frame (20). The outer surface of the limiting block (26) is fixedly connected to the outer surface of the horizontal plate (19).

8. The cell testing device for lithium battery pack repair according to claim 1, characterized in that: A rectangular groove (27) is provided on the outer side of the bottom of the outer surface of the circular shaft (3). A locking block (28) is movably fitted inside the rectangular groove (27). The bottom end of the locking block (28) passes through the transparent support plate (4) and extends to the inside of the top of the transparent support plate (4).

9. A cell testing device for lithium battery pack repair according to claim 8, characterized in that: The bottom end of the card block (28) is fixedly connected to a block (29), the outer surface of the block (29) and the inner surface of the top of the transparent support plate (4) are movably connected, the bottom end of the block (29) is fixedly connected to a second spring (30), and the other end of the second spring (30) is fixedly connected to the inner surface of the transparent support plate (4).

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