Square case battery cell test tool

Abstract

The utility model discloses a square shell electric core test frock, specifically relates to the technical field of electric core test, including frame, be provided with telescopic mechanism on the frame, be connected with intercommunication mechanism under telescopic mechanism, telescopic mechanism drive intercommunication mechanism and move, intercommunication mechanism includes intercommunication board, and the intercommunication board is passed through and is set up the sliding slot, is provided with contact pole in the sliding slot, contact pole can slide in the inside sliding slot. Adopt above structure, can make test frock adapt to the square shell electric core of different size.

Description

Technical Field

[0001] This utility model relates to the field of battery cell testing technology, specifically to a testing fixture for square-shell battery cells. Background Technology

[0002] As a core component of power batteries and energy storage devices, prismatic cells require rigorous performance testing before assembly. Prismatic cell performance testing is a technical process that uses systematic experimental methods to comprehensively evaluate its performance characteristics in terms of electrochemical performance, safety, mechanical strength, and environmental adaptability.

[0003] In the charging and discharging test of the battery cell, the traditional method requires welding external tabs to the two poles of the cell or using test equipment, while the existing tooling can only be used to test specific models of battery cells.

[0004] The above testing methods still have the following problems: when using the testing equipment, it is necessary to manually connect the two terminals to the two poles of the cell, which is time-consuming and labor-intensive; when testing the cell, it is necessary to weld the terminals of the cell, and the cell with welded terminals cannot be reused, resulting in resource waste; currently, the specifications of square-shell cells from different manufacturers in the market vary, and different testing fixtures are required for different battery models. Utility Model Content

[0005] The purpose of this utility model is to provide a testing fixture for square-shell battery cells. Through the coordinated operation of the shrinking mechanism, contact posts, and sliding groove, it solves the problems of poor adaptability of existing testing fixtures and the inability to reuse battery cells due to welding posts.

[0006] The objective of this utility model can be achieved through the following technical solutions: A testing fixture for square-shell battery cells includes a frame, on which a telescopic mechanism is provided, and a connecting mechanism is connected below the telescopic mechanism. The telescopic mechanism drives the connecting mechanism to move. The communication mechanism includes a communication plate with a through groove. A contact electrode is provided in the groove and can slide inside the groove.

[0007] As a further embodiment of this invention: a first spring is wound around the side of the contact post.

[0008] As a further embodiment of this utility model: two sliding grooves are provided, the length direction of the sliding grooves is parallel to the length direction of the connecting plate, and the two sliding grooves are symmetrically distributed along the centerline of the length direction of the connecting plate; two contact poles are provided.

[0009] As a further embodiment of this utility model: the frame includes a vertical plate and a horizontal plate, the telescopic mechanism is disposed on the vertical plate, a guide rail is fixedly disposed on one side of the vertical plate, the length direction of the guide rail is parallel to the gravity direction, and the guide rail is symmetrically distributed on both sides along the length direction of the vertical plate; a movable base is slidably disposed on the guide rail.

[0010] As a further embodiment of this utility model, it also includes an elastic mechanism, which is disposed on the top surface of the horizontal plate.

[0011] As a further embodiment of this utility model: the elastic mechanism includes support plates fixedly disposed on both sides of the top surface of the horizontal plate, and the support plates are symmetrically distributed along the centerline of the length direction of the horizontal plate; a second spring is fixedly disposed on the support plate; clamping plates are slidably disposed on both sides of the top surface of the horizontal plate, and the clamping plates are symmetrically distributed along the centerline of the length direction of the horizontal plate; one side of the second spring is connected to the support plate, and the other side is connected to the clamping plate.

[0012] As a further embodiment of this utility model: a baffle is fixedly provided on the top surface of the horizontal plate, and multiple rollers are rotatably provided on the baffle. One side of each roller is provided on the baffle, and the other side is provided on the vertical plate. The multiple rollers are symmetrically distributed along the centerline of the length direction of the horizontal plate, and the rollers and the guide rail are located on the same side of the vertical plate.

[0013] As a further embodiment of this utility model: the telescopic mechanism includes a support plate fixedly mounted on a vertical plate, the support plate being located above the guide rail; telescopic cylinders are fixedly mounted on both sides of the bottom of the support plate along the length direction.

[0014] As a further embodiment of this utility model, a Y-shaped space is formed between the two clamping plates.

[0015] As a further embodiment of this utility model: a rectangular hole is provided on the vertical plate, penetrating both sides of the vertical plate, and the rectangular holes are symmetrically distributed on both sides of the vertical plate along the centerline of the length direction of the vertical plate.

[0016] The beneficial effects of this utility model are: Driven by the telescopic mechanism, the connecting mechanism can move smoothly up and down, effectively solving the compatibility problem of the battery cell in the height direction and ensuring that battery cells of various heights can be effectively adapted.

[0017] Furthermore, through the coordinated operation of the telescopic mechanism, contact post, and sliding groove, the contact post moves within the sliding groove, and the telescopic mechanism drives the connecting mechanism to move, thereby enabling flexible adjustment of the contact post's position in space. This not only easily adapts to cells with different post spacings but also completely eliminates the complex operation of soldering cell posts during cell testing and the tedious step of manually connecting each terminal to the two poles of the cell, thus significantly improving the convenience and safety of testing. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of the frame in this utility model; Figure 3 This is a schematic diagram of the overall structure of the telescopic mechanism in this utility model; Figure 4 This is a schematic diagram of the overall structure of the connecting mechanism in this utility model; Figure 5 This is a schematic diagram of the overall structure of the contact electrode in this utility model; Figure 6 This is a schematic diagram of the overall structure of the elastic mechanism in this utility model; Figure 7 This is a schematic diagram of the internal structure of the elastic mechanism in this utility model.

[0020] In the diagram: 100, frame; 101, rectangular hole; 102, guide rail; 103, movable base; 104, baffle; 105, roller; 200, telescopic mechanism; 201, bearing plate; 202, telescopic cylinder; 300, connecting mechanism; 301, slide groove; 302, contact pole; 303, connecting plate; 304, first spring; 400, elastic mechanism; 401, clamping plate; 402, support plate; 403, second spring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1-7As shown, this utility model provides a testing fixture for square-shell battery cells. The testing fixture includes a frame 100, a telescopic mechanism 200 fixedly installed on one side of the frame 100, a connecting mechanism 300 connected below the telescopic mechanism 200, and the connecting mechanism 300 and the telescopic mechanism 200 located on the same side of the frame 100. Elastic mechanisms 400 are fixedly installed on both sides of the bottom surface of the frame 100, and the elastic mechanisms 400 are located below the connecting mechanism 300.

[0023] During operation, the battery cell is placed on the bottom surface of the frame 100 and clamped by the elastic mechanism 400 at the bottom of the frame 100, so that the battery cell is located at the midpoint of the bottom surface of the frame 100. After the battery cell is fixed by the elastic mechanism 400, the position of the connecting mechanism 300 is adjusted so that the connecting mechanism 300 can connect the two poles of the battery cell. Then, the telescopic mechanism 200 is activated so that the connecting mechanism 300 and the two poles of the battery cell come into contact to perform a charge and discharge test.

[0024] The telescopic mechanism 200 drives the connecting mechanism 300 to move up and down, accommodating the height orientation of the battery cells. Adjustments within the connecting mechanism 300 accommodate different terminal spacings within the battery cells. By adjusting the position of the connecting mechanism 300 in space, the problem of requiring different testing fixtures for different battery models is solved, significantly improving the flexibility and applicability of the testing fixture. Furthermore, this testing fixture is simple in design, easy to operate and maintain, greatly improving testing efficiency.

[0025] like Figure 1 As shown, the frame 100 includes a vertical plate and a horizontal plate. The vertical plate is parallel to the direction of gravity, and the horizontal plate is parallel to the horizontal direction. A rectangular hole 101 is provided on the vertical plate, penetrating both sides of the vertical plate. The two penetrating sides of the vertical plate are parallel to the direction of gravity. The rectangular holes 101 are symmetrically distributed on both sides of the vertical plate along the centerline of the length direction of the vertical plate. A guide rail 102 is fixedly provided on one side of the vertical plate. The length direction of the guide rail 102 is parallel to the direction of gravity, and the guide rail 102 is symmetrically distributed on both sides along the length direction of the vertical plate. A movable base 103 is slidably provided on the guide rail 102.

[0026] A baffle 104 is fixedly installed on the top surface of the horizontal plate. The baffle 104 is located on the side of the horizontal plate away from the vertical plate and is located at the midpoint of the length direction of the horizontal plate. Multiple rollers 105 are rotatably installed on the baffle 104. One side of the rollers 105 is installed on the baffle 104 and the other side is installed on the vertical plate. The multiple rollers 105 are arranged in parallel and are symmetrically distributed along the center line of the length direction of the horizontal plate. The rollers 105 and the guide rail 102 are located on the same side of the vertical plate.

[0027] The friction between the battery cell and the horizontal plate is changed from sliding friction to rolling friction by the roller 105. This effectively reduces wear and tear on the battery cells during testing. Meanwhile, the roller 105 and rectangular hole 101 facilitate the removal of the battery cells by operators.

[0028] like Figure 3 As shown, the telescopic mechanism 200 includes a support plate 201 fixedly mounted on a vertical plate, the support plate 201 being located above the guide rail 102; telescopic cylinders 202 are fixedly mounted on both sides of the bottom of the support plate 201 along the length direction, and the telescopic cylinders 202 are symmetrically distributed along the centerline of the length direction of the support plate 201.

[0029] like Figures 4-5 As shown, the aforementioned connecting mechanism 300 includes a connecting plate 303 fixedly mounted on the telescopic rod of the telescopic cylinder 202. One side of the connecting plate 303 along its width direction is fixedly mounted on the movable base 103. Two sliding grooves 301 are formed through the connecting plate 303. The length direction of the sliding grooves 301 is parallel to the length direction of the connecting plate 303, and the two sliding grooves 301 are symmetrically distributed along the centerline of the length direction of the connecting plate 303. A contact pole 302 is provided in each of the two sliding grooves 301, and the contact pole 302 can slide inside the sliding groove 301. A first spring 304 is wound around the side of the contact pole 302.

[0030] During operation, the contact post 302 is aligned with the two poles of the battery cell, and the telescopic cylinder 202 is activated. The telescopic rod of the telescopic cylinder 202 drives the connecting plate 303 to move up and down, which in turn drives the contact post 302 to move up and down. The contact post 302 then contacts the two poles of the battery cell to perform a charge and discharge test.

[0031] The design of the telescopic mechanism 200, the contact post 302, and the sliding groove 301 allows for adjustment of the position of the contact post 302 within the sliding groove 301 to accommodate cells with different post spacings. This solves the problems of soldering the cell posts and manually connecting the terminals to the cell poles during cell testing. Simultaneously, the first spring 304 ensures good contact between the contact post 302 and the cell poles, preventing inaccurate test data due to poor contact and improving test accuracy.

[0032] like Figures 6-7 As shown, the above-mentioned elastic mechanism 400 includes support plates 402 fixedly disposed on both sides of the top surface of the horizontal plate, and the support plates 402 are symmetrically distributed along the centerline of the length direction of the horizontal plate; a second spring 403 is fixedly disposed on the support plate 402; clamping plates 401 are slidably disposed on both sides of the top surface of the horizontal plate, and the clamping plates 401 are symmetrically distributed along the centerline of the length direction of the horizontal plate; one side of the second spring 403 is connected to the support plate 402, and the other side is connected to the clamping plate 401, and a Y-shaped space is formed between the two clamping plates 401, and the battery cell is placed in the Y-shaped space, which facilitates the placement of the battery cell.

[0033] During operation, the battery cell is placed above the roller 105 through the Y-shaped opening. The battery cell is clamped by the clamping plate 401 and the second spring 403, positioning it at the midpoint of the bottom surface of the frame 100. This facilitates the subsequent connection of the battery cell's two poles by the connecting mechanism 300. Simultaneously, the clamped battery cell is less prone to movement during testing, further improving testing accuracy.

[0034] The clamping plate 401 and the second spring 403 ensure that the battery cell is located at the midpoint of the bottom surface of the frame 100, while also ensuring the stability of the battery cell during the testing process. Meanwhile, the Y-shaped spatial design not only facilitates the insertion and removal of the battery cell but also accommodates battery cells of different sizes, further enhancing the flexibility and applicability of the testing fixture.

[0035] The working principle of this utility model: During operation, the operator first places the battery cell to be tested on the bottom surface of the frame 100. The battery cell is firmly clamped by the clamping plates 401 on both sides and the elastic force of the second spring 403, ensuring that the battery cell is located at the midpoint of the bottom surface of the frame 100. Then, according to the specific model of the battery cell and the spacing between the terminals, the operator adjusts the position of the contact terminal 302 in the connecting mechanism 300 so that the contact terminal 302 is accurately aligned with the two poles of the battery cell. After adjustment, the telescopic cylinder 202 in the telescopic mechanism 200 is activated. The telescopic rod of the telescopic cylinder 202 drives the connecting plate 303 and the contact terminal 302 set on the connecting plate 303 to move up and down. Under the action of the first spring 304, the contact terminal 302 makes tight contact with the two poles of the battery cell, and the charge-discharge test begins.

[0036] During testing, the battery cell remains stable under the combined action of the frame 100 and the spring mechanism 400, preventing inaccurate test data caused by shaking. Simultaneously, the rollers 105 transform the friction between the battery cell and the horizontal plate from sliding friction to rolling friction, effectively reducing wear on the battery cell during testing and extending its lifespan. After testing, the operator only needs to adjust the position of the connecting mechanism 300 to test the next battery cell, greatly improving testing efficiency.

[0037] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A testing fixture for square-shell battery cells, characterized in that, Includes a frame (100), on which a telescopic mechanism (200) is provided, and a connecting mechanism (300) is connected below the telescopic mechanism (200), and the telescopic mechanism (200) drives the connecting mechanism (300) to move; The connecting mechanism (300) includes a connecting plate (303), on which a sliding groove (301) is provided, and a contact pole (302) is provided in the sliding groove (301), and the contact pole (302) can slide inside the sliding groove (301).

2. The testing fixture for a square-shell battery cell according to claim 1, characterized in that, A first spring (304) is wound around the side of the contact post (302).

3. The testing fixture for a square-shell battery cell according to claim 1, characterized in that, Two slide grooves (301) are provided. The length direction of the slide grooves (301) is parallel to the length direction of the connecting plate (303), and the two slide grooves (301) are symmetrically distributed along the centerline of the length direction of the connecting plate (303); two contact poles (302) are provided.

4. The testing fixture for a square-shell battery cell according to claim 1, characterized in that, The frame (100) includes a vertical plate and a horizontal plate. The telescopic mechanism (200) is installed on the vertical plate. A guide rail (102) is fixedly installed on one side of the vertical plate. The length direction of the guide rail (102) is parallel to the gravity direction, and the guide rail (102) is symmetrically distributed on both sides along the length direction of the vertical plate. A movable base (103) is slidably installed on the guide rail (102).

5. The testing fixture for a square-shell battery cell according to claim 4, characterized in that, It also includes an elastic mechanism (400) disposed on the top surface of the horizontal plate.

6. The testing fixture for a square-shell battery cell according to claim 5, characterized in that, The elastic mechanism (400) includes support plates (402) fixedly disposed on both sides of the top surface of the horizontal plate, and the support plates (402) are symmetrically distributed along the centerline of the length direction of the horizontal plate; a second spring (403) is fixedly disposed on the support plate (402); a clamping plate (401) is slidably disposed on both sides of the top surface of the horizontal plate, and the clamping plate (401) is symmetrically distributed along the centerline of the length direction of the horizontal plate; one side of the second spring (403) is connected to the support plate (402), and the other side is connected to the clamping plate (401).

7. The testing fixture for a square-shell battery cell according to claim 4, characterized in that, A baffle (104) is fixedly installed on the top surface of the horizontal plate. Multiple rollers (105) are rotatably installed on the baffle (104). One side of each roller (105) is installed on the baffle (104), and the other side is installed on the vertical plate. The multiple rollers (105) are symmetrically distributed along the centerline of the horizontal plate. The rollers (105) and the guide rail (102) are located on the same side of the vertical plate.

8. The testing fixture for a square-shell battery cell according to claim 4, characterized in that, The telescopic mechanism (200) includes a support plate (201) fixedly mounted on a vertical plate, the support plate (201) being located above the guide rail (102); telescopic cylinders (202) are fixedly mounted on both sides of the bottom of the support plate (201) along the length direction.

9. A testing fixture for a square-shell battery cell according to claim 6, characterized in that, A Y-shaped space is formed between the two clamping plates (401).

10. A testing fixture for a square-shell battery cell according to claim 4, characterized in that, The vertical plate has rectangular holes (101) that penetrate both sides of the vertical plate. The rectangular holes (101) are symmetrically distributed on both sides of the vertical plate along the centerline of the length direction of the vertical plate.

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