Square lithium battery charging and discharging test frame

Abstract

The utility model discloses a square lithium battery charging and discharging test frame, which comprises a bottom plate, a support plate is fixedly mounted on one side of the bottom plate, and a top plate is fixedly mounted at the top end of the support plate. When battery cells of the same batch need to be detected, the battery cells are placed above the bottom plate, the hand wheel is pressed downwards, the rotating rod and the top plate are clamped and fixed through the clamping assembly, at the moment, the probe ring below is rotated, the probe ring abuts against the positive electrode and the negative electrode of the battery cells, and then the battery cells can be detected. When a subsequent battery cell needs to be detected, the clamping assembly can be unlocked only by rotating the rotating rod without adjustment, the detected battery cell can be taken out by upwards bouncing the rotating rod and the lifting plate under the action of the elastic limiting assembly, and when the next battery cell needs to be detected subsequently, only the hand wheel needs to be pressed downwards and then the rotating rod is rotated, so that the next battery cell can be taken out. Therefore, clamping and fixing can be realized again, and the detection rate and convenience are improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery testing technology, and in particular to a square lithium battery charge and discharge test fixture. Background Technology

[0002] Lithium-ion battery cells require testing before leaving the factory, a crucial step in the battery manufacturing process. As the core component of a battery, the performance and quality of the cell directly affect the reliability, safety, and lifespan of the entire battery system. The cell production process involves multiple complex steps, including electrode coating, winding or stacking, and packaging. These processes can introduce problems such as material defects and process errors. Therefore, rigorous charge-discharge testing to verify the performance of cells before they leave the factory is essential. This not only allows for the timely detection and resolution of potential performance issues such as insufficient capacity, excessive internal resistance, and short cycle life, ensuring that each cell meets its predetermined performance specifications, but also improves the overall quality of the product, enhances market competitiveness, and meets consumer demand for high-quality batteries.

[0003] Existing testing methods suffer from several significant drawbacks and urgently need improvement. Currently, most charge-discharge testing methods require connecting the battery cell to the testing equipment via welding tabs. This method has several shortcomings. Firstly, welding tabs is cumbersome, requiring substantial manpower and time, thus reducing testing efficiency. Secondly, the welding process may damage the appearance and structure of the battery cell, causing scratches or deformation, which not only affects its aesthetics but may also adversely impact its performance. Furthermore, welding tabs increase testing costs, including material costs, equipment costs, and maintenance costs, hindering the widespread use and reuse of the battery cell. These drawbacks limit the application scope and efficiency of existing testing methods, failing to meet the demands of large-scale automated production. Therefore, there is an urgent need to develop a more efficient, convenient, and low-cost testing method.

[0004] Patent document CN219590474U discloses a testing fixture for high-rate charging and discharging of lithium batteries, including a base plate. A battery placement position is provided on the upper part of the base plate near its center. A clamping component for fixing the battery to be tested in the battery placement position is provided on the base plate near the battery placement position. A support frame is fixedly installed on the base plate, and a charging and discharging connection component is slidably installed on the support frame. This utility model has a simple overall structure and is easy to use. It can fix the battery during high-rate charging and discharging tests and facilitate the connection of charging and discharging wires. It can monitor the battery surface temperature at any time and has high safety, protecting the test personnel.

[0005] As with the prior art of the aforementioned patent, when using the above-mentioned testing device, the height of the pressure plate needs to be adjusted by adjusting the nut each time a battery is tested to ensure that the probe ring on the pressure plate can contact the positive and negative terminals of the battery for testing. When it is necessary to test the next battery in the same batch, this process must be repeated: first, the pressure plate is adjusted to remove the battery that has already been tested, then the new battery to be tested is placed in, and the pressure plate is adjusted again for testing. Such a testing process is rather cumbersome. Utility Model Content

[0006] The purpose of this invention is to provide a square lithium battery charge and discharge test fixture to address the aforementioned shortcomings in the prior art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a square lithium battery charge and discharge test frame, comprising a base plate, a support plate fixedly installed on one side of the base plate, a top plate fixedly installed on the top of the support plate, a lifting plate disposed below the top plate, an elastic limiting component disposed between the lifting plate and the top plate, a fixing column fixedly installed on the lifting plate, a connecting piece disposed at the top of the fixing column, a through groove opened in the top plate, the connecting piece passing through the through groove, a nut threadedly installed at the top of the fixing column, the connecting piece being locked onto the fixing column by the nut, a probe ring threadedly installed at the bottom end of the fixing column penetrating the lifting plate, a rotating rod rotatably installed at the top of the lifting plate, a handwheel fixedly installed at the top end of the rotating rod penetrating the top plate, and a snap-fit ​​component disposed between the rotating rod and the top plate.

[0008] As a further description of the above technical solution: the elastic limiting component includes multiple limiting holes, which are formed on the top plate. A limiting rod is slidably installed inside the limiting hole. The bottom end of the limiting rod is fixedly connected to the lifting plate. A spring is sleeved on the limiting rod. The bottom end of the spring is fixedly connected to the top end of the lifting plate, and the top end of the spring is fixedly connected to the bottom of the top plate.

[0009] As a further description of the above technical solution: the snap-fit ​​assembly includes two limiting blocks fixedly installed on the side wall of the rotating rod, and two sliding grooves are opened on the top plate, with the two sliding grooves being directly below the limiting blocks.

[0010] As a further description of the above technical solution: the connector has a wire hole.

[0011] As a further description of the above technical solution: a reinforcing plate is fixedly installed between the base plate and the support plate, and the reinforcing plate is disposed at both ends of the base plate.

[0012] As a further description of the above technical solution: a placement groove is provided at the top of the base plate, and an anti-slip layer is provided inside the placement groove.

[0013] This invention provides a square lithium battery charge / discharge test rack. It offers the following advantages: When testing battery cells from the same batch, the cells are placed on the base plate. By pressing down the handwheel, the rotating rod and top plate are locked and fixed using a locking assembly. Then, by rotating the probe ring below, the probe ring is brought into contact with the positive and negative terminals of the cell, thus enabling cell testing. When testing subsequent cells, no adjustment is needed; simply rotating the rotating rod unlocks the locking assembly. The rotating rod and lifting plate spring upwards under the action of the elastic limiting assembly, allowing the tested cell to be removed. To test the next cell, simply press down the handwheel and rotate the rotating rod to lock and fix it again, increasing testing speed and convenience.

[0014] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0015] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a square lithium battery charge and discharge test fixture proposed in this utility model.

[0017] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0018] Figure 3 This is a side view of the structure of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the present invention when the prismatic lithium battery is not tested;

[0020] Figure 5 This is a schematic diagram of the structure of the fixing post, the connecting piece, and the probe ring of this utility model;

[0021] Figure 6 This is a three-dimensional structural diagram of the rotating rod, limiting block, and sliding groove of this utility model;

[0022] Figure 7 This is a three-dimensional structural diagram of the limiting block of this utility model being snapped into the bottom of the top plate.

[0023] Legend:

[0024] 1. Base plate; 2. Support plate; 3. Reinforcing plate; 4. Lithium battery body; 5. Top plate; 6. Through slot; 7. Limiting hole; 8. Spring; 9. Limiting rod; 10. Lifting plate; 11. Rotating rod; 12. Handwheel; 13. Slide groove; 14. Limiting block; 15. Fixing column; 16. Probe ring; 17. Connecting piece; 18. Wire hole; 19. Placement slot; 20. Anti-slip layer; 21. Nut. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Reference Figure 1-7 A square lithium battery charge / discharge test frame includes a base plate 1, a support plate 2 fixedly mounted on one side of the base plate 1, a top plate 5 fixedly mounted on the top of the support plate 2, a lifting plate 10 disposed below the top plate 5, an elastic limiting component disposed between the lifting plate 10 and the top plate 5, a fixing post 15 fixedly mounted on the lifting plate 10, a connector 17 disposed at the top of the fixing post 15, a through groove 6 formed in the top plate 5 through which the connector 17 passes, a nut 21 threaded onto the top of the fixing post 15, the connector 17 being locked to the fixing post 15 by the nut 21, a probe ring 16 threadedly mounted at the bottom end of the fixing post 15 through the lifting plate 10, and a rotating rod 11 rotatably mounted at the top of the lifting plate 10, the top end of the rotating rod 11 through the top plate 5 and fixedly mounted with a hand. A locking assembly is provided between the rotating rod 11 and the top plate 5. When testing battery cells of the same batch, the cells are placed on the bottom plate 1. The handwheel 12 is pressed down, and the rotating rod 11 and the top plate 5 are locked and fixed by the locking assembly. At this time, the probe ring 16 below is rotated to contact the positive and negative terminals of the cell, thus enabling cell testing. When subsequent cells need to be tested, no adjustment is required. Simply rotate the rotating rod 11 to unlock the locking assembly. The rotating rod 11 and the lifting plate 10 spring upward under the action of the elastic limiting assembly, allowing the tested cell to be removed. When testing the next cell, simply press down the handwheel 12 and rotate the rotating rod 11 to lock and fix it again, increasing the testing speed and convenience.

[0027] As a preferred embodiment, the elastic limiting component includes multiple limiting holes 7, which are formed on the top plate 5. A limiting rod 9 is slidably installed inside the limiting hole 7. The bottom end of the limiting rod 9 is fixedly connected to the lifting plate 10. A spring 8 is sleeved on the limiting rod 9. The bottom end of the spring 8 is fixedly connected to the top end of the lifting plate 10, and the top end of the spring 8 is fixedly connected to the bottom of the top plate 5. During the up-and-down movement of the lifting plate 10, the limiting rod 9 is always slidably installed inside the limiting hole 7, ensuring that the lifting plate 10 can move up and down stably. Furthermore, the spring 8 enables the lifting plate 10 to rebound, facilitating the removal of the tested battery cell.

[0028] As a preferred technical solution of this embodiment, the locking assembly includes two limiting blocks 14 fixedly installed on the side wall of the rotating rod 11, and two sliding grooves 13 are opened on the top plate 5, with the two sliding grooves 13 directly below the limiting blocks 14; when the rotating rod 11 is pressed down, the two limiting blocks 14 are inserted into the interior of the sliding grooves 13. After the limiting blocks 14 slide out of the sliding grooves 13, rotating the rotating rod 11 can lock the limiting blocks 14 under the top plate 5, thereby achieving the limiting of the lifting plate 10.

[0029] As a preferred technical solution in this embodiment, the connector 17 is provided with a wire hole 18; the wire hole 18 facilitates the connection of the detection wire to the connector 17.

[0030] As a preferred technical solution of this embodiment, a reinforcing plate 3 is fixedly installed between the base plate 1 and the support plate 2, and the reinforcing plate 3 is disposed at both ends of the base plate 1; the reinforcing plate 3 can increase the stability between the base plate 1 and the support plate 2.

[0031] As a preferred technical solution of this embodiment, a placement groove 19 is provided at the top of the base plate 1, and an anti-slip layer 20 is provided inside the placement groove 19; the battery cell to be tested is placed inside the placement groove 19 above the base plate 1, and the anti-slip layer 20 can increase the stability of the battery cell placement.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A square lithium battery charge / discharge test frame, comprising a base plate (1), characterized in that, A support plate (2) is fixedly installed on one side of the base plate (1), and a top plate (5) is fixedly installed on the top of the support plate (2). A lifting plate (10) is provided below the top plate (5). An elastic limiting component is provided between the lifting plate (10) and the top plate (5). A fixing column (15) is fixedly installed on the lifting plate (10), and a connecting piece (17) is provided at the top of the fixing column (15). A through groove (6) is provided on the top plate (5), and the connecting piece (17) passes through the through groove (6). The top end of the fixed column (15) is threaded with a nut (21), and the connecting piece (17) is locked onto the fixed column (15) by the nut (21). The bottom end of the fixed column (15) passes through the lifting plate (10) and is threaded with a probe ring (16). The top end of the lifting plate (10) is rotatably mounted with a rotating rod (11). The top end of the rotating rod (11) passes through the top plate (5) and is fixedly mounted with a handwheel (12). A snap-fit ​​assembly is provided between the rotating rod (11) and the top plate (5).

2. The square lithium battery charge / discharge test fixture according to claim 1, characterized in that, The elastic limiting component includes multiple limiting holes (7), which are opened on the top plate (5). A limiting rod (9) is slidably installed inside the limiting hole (7). The bottom end of the limiting rod (9) is fixedly connected to the lifting plate (10). A spring (8) is sleeved on the limiting rod (9). The bottom end of the spring (8) is fixedly connected to the top end of the lifting plate (10), and the top end of the spring (8) is fixedly connected to the bottom of the top plate (5).

3. The square lithium battery charge / discharge test fixture according to claim 1, characterized in that, The snap-fit ​​assembly includes two limiting blocks (14) fixedly installed on the side wall of the rotating rod (11), and two sliding grooves (13) are opened on the top plate (5), with the two sliding grooves (13) being opened directly below the limiting blocks (14).

4. The square lithium battery charge / discharge test fixture according to claim 1, characterized in that, The connector (17) has a wire hole (18).

5. A square lithium battery charge / discharge test fixture according to claim 1, characterized in that, A reinforcing plate (3) is fixedly installed between the base plate (1) and the support plate (2), and the reinforcing plate (3) is set at both ends of the base plate (1).

6. A square lithium battery charge / discharge test fixture according to claim 1, characterized in that, The top of the base plate (1) is provided with a placement groove (19), and the interior of the placement groove (19) is provided with an anti-slip layer (20).

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