A square aluminum shell battery cell test fixture

Abstract

The utility model relates to a technical field of electric core test, especially a square aluminium shell electric core's test frock clamp, including the bayonet base, still including the support board, wherein, the left and right sides of bayonet base bottom all are screwed with several top tight bolts, is used for clamping and fixing the bayonet base in the electric core top, the support board is fixed in the bayonet base top, and the gap for the bar sheet insertion is reserved between both, the bayonet base is set up on the pole positioning hole, to supply the pole to extend into the gap, the support board is screwed with the pressure bolt, is used for the bar sheet pressure tight fixed on the pole. The utility model improves the connection stability between the clamp and the electric core pole by optimizing the clamp structure, ensures that the clamp does not loosen and does not disconnect during the test process, thereby improving the stability of the test process and the accuracy of the test data, and solving the problem of poor clamping stability and easy sliding and falling of the existing test clamp when applied to the square aluminium shell electric core with short pole and smooth surface.

Description

Technical Field

[0001] This utility model relates to the field of battery cell testing technology, and in particular to a testing fixture for square aluminum-cased battery cells. Background Technology

[0002] In the research and development and production of square aluminum-cased battery cells, to ensure that their electrical and safety performance meets design requirements, it is usually necessary to perform electrical performance tests on the cells using test fixtures, such as measuring parameters like voltage, internal resistance, capacity, and cycle life. As a crucial medium connecting the battery cell and the testing equipment, the structural design of the test fixture directly affects the testing efficiency and the accuracy of the test results.

[0003] In the prior art, for example, a battery cell testing fixture disclosed in utility model patent application CN219224889U includes a frame, a fixing component, and a clamping component. The fixing component is disposed on the side of the frame and is used to fix the terminal post to the frame; the clamping component is disposed on the top of the frame and is used to press and fix the battery cell terminal post. This fixture can, to a certain extent, avoid damage to the battery cell terminal post during clamping and has good reusability, making it suitable for the testing needs of some battery types.

[0004] However, in practical applications, this type of test fixture still has significant shortcomings when used with square aluminum-cased battery cells. Because square aluminum-cased battery cells are designed with space utilization in mind, their positive and negative terminals are typically short and have smooth surfaces, making them prone to slippage or detachment during clamping with existing fixtures, affecting the stability and safety of the testing process. Therefore, it is necessary to provide a test fixture for square aluminum-cased battery cells. Utility Model Content

[0005] In view of this, this utility model proposes a test fixture for square aluminum-shell battery cells. By optimizing the fixture structure, it improves the connection stability between the fixture and the battery cell terminal, ensuring that the fixture does not loosen or break during the test, thereby improving the stability of the test process and the accuracy of the test data. It solves the problems of poor clamping stability and easy slippage and fall-off of existing test fixtures when applied to square aluminum-shell battery cells with short terminals and smooth surfaces.

[0006] The technical solution of this utility model is implemented as follows:

[0007] This utility model provides a testing fixture for square aluminum-cased battery cells, including a bayonet base and a support plate.

[0008] Several tightening bolts are screwed onto both the left and right sides of the bottom of the bayonet base to clamp and fix the bayonet base to the top of the battery cell.

[0009] The bracket plate is fixed to the top of the bayonet base, and a gap is reserved between the two for the insertion of the bar plate;

[0010] The bayonet base is provided with a pole positioning hole so that the pole can be inserted into the gap;

[0011] The bracket plate is screwed with clamping bolts to press and fix the bar to the pole.

[0012] Based on the above technical solution, preferably, the left and right ends of the bayonet base are bent downwards to form a bolt mounting part, wherein,

[0013] At least two tightening bolts are screwed onto each of the bolt mounting portions.

[0014] The tightening bolt is positioned laterally to abut against the side end of the battery cell.

[0015] Based on the above technical solutions, preferably, a first insulating pad is fixed to the side of the bolt mounting portion near the battery cell, and a second insulating pad is fixed to the bottom surface of the bayonet base, wherein...

[0016] The second insulating pad has a vertical through hole through which the pole post passes.

[0017] Based on the above technical solutions, preferably, a protective pad is fixed on one end of the tightening bolt that abuts against the battery cell.

[0018] Based on the above technical solutions, preferably, a third insulating pad is fixed on each of the left and right sides of the top of the bayonet base.

[0019] Based on the above technical solution, preferably, the front and rear ends of the bracket plate are bent downwards to form a support portion, wherein,

[0020] The support is fixedly connected to the top of the bayonet base;

[0021] The gap is formed by the enclosure between the bayonet base, the bracket plate, and the support portion.

[0022] Based on the above technical solutions, preferably, the vertical width of the gap is greater than the thickness of the plaster, and the horizontal width of the gap is greater than the width of the plaster.

[0023] Based on the above technical solutions, preferably, the support plate is transparent.

[0024] Based on the above technical solutions, preferably, the clamping bolt penetrates the bracket plate vertically and is screwed in.

[0025] Based on the above technical solutions, preferably, a fourth insulating pad is fixed to the lower end of the clamping bolt.

[0026] The testing fixture for square aluminum-cased battery cells of this utility model has the following advantages over the prior art:

[0027] (1) By setting up the main structure consisting of the bayonet base and the bracket plate, and with the double fixing mechanism of the top bolt and the clamping bolt, the connection stability between the fixture and the cell is effectively improved, ensuring that the fixture does not loosen or break during the test, thereby improving the stability of the test process and the accuracy of the test data. This fixture is particularly suitable for the test scenario of square aluminum shell cells with short poles and smooth surfaces.

[0028] (2) By setting the support plate to a transparent structure, it is not only convenient for the pole to be accurately inserted into the pole positioning hole, but also convenient for the operator to observe the connection status between the bar and the pole in real time, which helps to detect problems such as abnormal connection or poor contact in a timely manner, thereby improving the visualization and detection efficiency of the testing process and further ensuring the reliability of the test results. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a perspective view of a test fixture for a square aluminum-shell battery cell according to the present invention.

[0031] Figure 2 This is a perspective view of a test fixture for a square aluminum-shell battery cell according to this utility model.

[0032] Figure 3 This is a schematic diagram showing the usage state of a test fixture for a square aluminum-shell battery cell according to this utility model.

[0033] Figure 4 A 3D view of the clamping bolt;

[0034] In the diagram: 1. Bayonet base; 2. Support plate; 4. Battery cell; 5. Battery plate; 11. Tightening bolt; 12. First insulating pad; 13. Second insulating pad; 14. Third insulating pad; 21. Tightening bolt; 22. Fourth insulating pad; 41. Terminal post; 101. Terminal post positioning hole; 102. Bolt mounting part; 201. Gap; 202. Support part. Detailed Implementation

[0035] The technical solutions of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] like Figure 1-4 As shown, the present invention provides a test fixture for a square aluminum-cased battery cell, which includes a bayonet base 1 and a support plate 2.

[0037] The bayonet base 1 has several tightening bolts 11 screwed onto both the left and right sides of its bottom for clamping and fixing it to the top of the battery cell 4. A bracket plate 2 is fixed to the top of the bayonet base 1, with a gap 201 reserved between them for inserting the electrode 41. The bayonet base 1 has a pole positioning hole 101 for the pole 41 to extend into the gap 201. A clamping bolt 21 is screwed onto the bracket plate 2 to press and fix the electrode 5 onto the pole 41.

[0038] In practical applications, the top of the battery cell 4 is first clamped and fixed to the bottom of the bayonet base 1 by adjusting the tightening bolt 11, while ensuring that the electrode post 41 is accurately inserted into the electrode post positioning hole 101, thus completing the initial fixed connection between the clamp and the battery cell 4. Then, the electrode plate 5 is inserted into the gap 201, and the clamping bolt 21 is rotated to press the lower end of the electrode plate 5, thereby achieving a stable electrical connection between the electrode plate 5 and the electrode post 41.

[0039] By employing a main structure consisting of a bayonet base 1 and a support plate 2, coupled with a dual fixing mechanism of tightening bolts 11 and clamping bolts 21, the connection stability between the clamp and the battery cell 4 is significantly improved, effectively preventing the clamp from loosening or falling off during testing, thereby enhancing the stability and data accuracy of the testing process. This structure is particularly suitable for testing square aluminum-shell battery cells with short poles and smooth surfaces, solving the technical problems of unstable clamping and easy slippage of existing clamps on this type of battery cell.

[0040] In the above-mentioned fixture, the left and right ends of the bayonet base 1 are bent downwards and form a bolt mounting part 102 respectively. At least two tightening bolts 11 are screwed onto each bolt mounting part 102. The tightening bolts 11 are arranged horizontally to abut the side end of the battery cell 4.

[0041] This structure allows the top of the battery cell 4 to be clamped and fixed between the two bolt mounting parts 102. The tightening bolts 11 apply clamping force to the battery cell 4 from both sides. Combined with the pressing action of the clamping bolts 21 on the bracket plate 2 on the plate 5 and the pole post 41, the overall fixing effect of the clamp on the battery cell 4 is further enhanced.

[0042] In the aforementioned fixture, a first insulating pad 12 is fixed to the bolt mounting portion 102 on the side near the battery cell 4. Specifically, only the two ends of the first insulating pad 12 are fixedly connected to the bolt mounting portion 102 to facilitate the deformation of the first insulating pad 12 towards the battery cell 4. The first insulating pad 12 is an elastic rubber pad, or it can be other rubber pads with stretchable deformation and insulating capabilities, such as urethane rubber pads.

[0043] When the tightening bolt 11 is moved towards tightening the battery cell 4, the tightening bolt 11 forces the portion of the first insulating pad 12 in contact with it to deform towards the battery cell 4. After tightening the tightening bolt 11, the portion of the first insulating pad 12 in contact with the tightening bolt 11 is clamped between the tightening bolt 11 and the battery cell 4. The first insulating pad 12 serves both as insulation and as a protective layer for the side of the battery cell 4, preventing damage to the side of the battery cell 4.

[0044] Furthermore, a protective pad is fixed to one end of the tightening bolt 11 that abuts against the battery cell 4. This protective pad can be made of rubber or silicone material, which has good cushioning performance and wear resistance. During the clamping process, the protective pad can prevent the end of the tightening bolt 11 from damaging the first insulating pad 12.

[0045] In the above structure, a second insulating pad 13 is fixed to the bottom surface of the bayonet base 1, and the second insulating pad 13 has a vertical through hole for the electrode post 41 to pass through, ensuring that the electrode post 41 can be smoothly inserted into the electrode post positioning hole 101. By setting the first insulating pad 12 and the second insulating pad 13, the metal contact between the bayonet base 1 and the battery cell 4 is effectively isolated, preventing accidental conduction during testing and improving operational safety.

[0046] In addition, a third insulating pad 14 is fixed on each of the left and right sides of the top of the bayonet base 1 to isolate the direct contact between the bar plate 5 and the bayonet base 1, further preventing short circuits or leakage caused by contact between metal parts, and ensuring the safety and stability of the testing process.

[0047] Meanwhile, the clamping bolt 21 penetrates vertically through the support plate 2 and is screwed to it. A fourth insulating pad 22 is fixed at its lower end to achieve insulation isolation between the clamping bolt 21 and the plate 5, so as to avoid safety risks caused by the clamping bolt 21 being energized, thereby comprehensively improving the electrical safety performance of the fixture.

[0048] In the aforementioned fixture, the front and rear ends of the support plate 2 are bent downwards to form a support portion 202, which is fixedly connected to the top of the bayonet base 1. This structure creates a gap 201 between the bayonet base 1, the support plate 2, and the support portion 202. The vertical width of this gap 201 is greater than the thickness of the bar piece 5, and the horizontal width of the gap 201 is greater than the width of the bar piece 5. This provides appropriate tolerance space for the insertion and removal of the bar piece 5, avoiding difficulties in insertion and removal or poor clamping due to assembly errors or manufacturing tolerances. This improves the adaptability and ease of use of the fixture, facilitating the rapid completion of test connection operations.

[0049] Furthermore, the support plate 2 is made of a transparent material, such as polycarbonate or acrylic engineering plastics. The transparent support plate 2 facilitates observation of whether the electrode post 41 is accurately inserted into the electrode post positioning hole 101. It also helps to monitor the connection status between the bar plate 5 and the electrode post 41 in real time, which helps to detect problems such as abnormal connection or poor contact in a timely manner. This improves the visualization and detection efficiency of the testing process and further ensures the reliability of the test results.

[0050] The method of using the testing fixture for a square aluminum-shell battery cell according to this utility model is as follows:

[0051] First, place the clamp on top of the battery cell 4 to be tested, and tighten the bolts 11 on both sides of the bayonet base 1 to clamp the battery cell 4 from both sides until the battery cell 4 is stably clamped and fixed to the bottom of the bayonet base 1. During this process, ensure that the terminal 41 of the battery cell 4 is accurately inserted into the terminal positioning hole 101 on the bayonet base 1, thereby completing the initial fixed connection between the clamp and the battery cell 4.

[0052] Subsequently, insert one end of the bar plate 5 into the gap 201 and rotate the clamping bolt 21 on the bracket plate 2 to gradually press the lower end of the bar plate 5, thus achieving a stable electrical connection between the bar plate 5 and the pole post 41.

[0053] The above are merely preferred embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A testing fixture for a square aluminum-cased battery cell, comprising a bayonet base (1), characterized in that: It also includes a support plate (2), wherein, Several tightening bolts (11) are screwed onto the left and right sides of the bottom of the bayonet base (1) to clamp and fix the bayonet base (1) to the top of the battery cell (4); The bracket plate (2) is fixed to the top of the bayonet base (1), and a gap (201) is reserved between the two for the insertion of the bar plate (5). The bayonet base (1) is provided with a pole positioning hole (101) so that the pole (41) can be inserted into the gap (201); The bracket plate (2) is screwed with a clamping bolt (21) for pressing and fixing the bar plate (5) onto the pole post (41).

2. The testing fixture for a square aluminum-cased battery cell as described in claim 1, characterized in that: The left and right ends of the bayonet base (1) are bent downwards to form a bolt mounting part (102) respectively, wherein, At least two of the aforementioned tightening bolts (11) are screwed onto each of the bolt mounting portions (102). The tightening bolt (11) is arranged laterally to abut against the side end of the battery cell (4).

3. The testing fixture for a square aluminum-cased battery cell as described in claim 2, characterized in that: A first insulating pad (12) is fixed to the side of the bolt mounting part (102) near the battery cell (4), and a second insulating pad (13) is fixed to the bottom surface of the bayonet base (1). The second insulating pad (13) has a vertical through hole through which the pole post (41) passes.

4. The testing fixture for a square aluminum-cased battery cell as described in claim 1, characterized in that: A protective pad is fixed on one end of the tightening bolt (11) that abuts against the battery cell (4).

5. The testing fixture for a square aluminum-cased battery cell as described in claim 1, characterized in that: A third insulating pad (14) is fixed on each of the left and right sides of the top of the bayonet base (1).

6. The testing fixture for a square aluminum-cased battery cell as described in claim 1, characterized in that: The support plate (2) is bent downwards at both ends to form a support part (202), wherein... The support (202) is fixedly connected to the top of the bayonet base (1); The gap (201) is formed by the bayonet base (1), the bracket plate (2) and the support part (202).

7. The testing fixture for a square aluminum-cased battery cell as described in claim 1, characterized in that: The gap (201) is wider in the vertical direction than the thickness of the plaster (5), and the gap (201) is wider in the horizontal direction than the width of the plaster (5).

8. The testing fixture for a square aluminum-cased battery cell as described in claim 1, characterized in that: The support plate (2) is transparent.

9. The testing fixture for a square aluminum-cased battery cell as described in claim 1, characterized in that: The clamping bolt (21) passes vertically through the bracket plate (2) and is screwed in.

10. The testing fixture for a square aluminum-cased battery cell as described in claim 8, characterized in that: The lower end of the clamping bolt (21) is fixed with a fourth insulating pad (22).

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