Battery cell test fixture

Abstract

The utility model discloses a kind of electric core test fixture tool, wooden insulating substrate, for carrying the electric core to be tested;At least one pair of conductive pressure strip, set on the insulating substrate, the conductive pressure strip is used to with the positive, negative pole lug of the electric core to be tested one-to-one corresponding contact;Insulating pad strip, with the conductive pressure strip one-to-one corresponding setting;Adjusting structure, set on the insulating substrate, the conductive pressure strip slidably connects adjusting structure, to make the conductive pressure strip can be moved along the length direction or width direction of corresponding pole lug;Detachable connecting structure, through the conductive pressure strip and corresponding insulating pad strip, for the conductive pressure strip and insulating pad strip detachably fixed. Through the groove structure to realize the two-way adjustment of conductive pressure strip along pole lug length and width direction, can adapt to the electric core of different pole lug size (length, width, spacing), without designing fixture for each specification separately, reduce equipment cost and improve test efficiency.

Description

Technical Field

[0001] This utility model relates to the field of fixture and tooling technology, specifically to a battery cell testing fixture and tooling. Background Technology

[0002] In the production and R&D of battery cells, performance testing is a crucial step in ensuring product quality, and the reliability of test fixtures directly affects testing efficiency and data accuracy. Existing battery cell test fixtures often suffer from poor compatibility, typically only compatible with cells of specific specifications. When dealing with cells of different tab sizes (length, width, spacing), frequent fixture changes are necessary, increasing equipment costs and reducing testing efficiency. Furthermore, some fixtures have poorly designed conductive contact structures, resulting in high contact resistance and unstable signal transmission, affecting test accuracy. The clamping mechanisms are often rigidly fixed, easily causing crush damage to the cell tabs, and are cumbersome to operate, hindering rapid cell removal and removal. Utility Model Content

[0003] In order to overcome the shortcomings of existing technical solutions, this utility model provides a battery cell testing fixture, which can effectively solve the problems mentioned in the background art.

[0004] The technical solution adopted by this utility model to solve its technical problem is: A battery cell testing fixture includes: A wooden insulating substrate is used to support the battery cell to be tested; At least one pair of voltage-conducting strips are disposed on the insulating substrate, and the voltage-conducting strips are used to make one-to-one contact with the positive and negative tabs of the battery cell to be tested; Insulating pads are provided one-to-one with the conductive strips; An adjustment structure is disposed on the insulating substrate, and the voltage conductive strip is slidably connected to the adjustment structure so that the voltage conductive strip can move along the length or width direction of the corresponding tab; A detachable connection structure extends through the conductive strip and the corresponding insulating pad, used to detachably fix the conductive strip and the insulating pad; The conductive strip, in conjunction with the corresponding insulating pad, is used to clamp the tabs of the battery cell to be tested.

[0005] As a further description of the above technical solution, the conductive strip is made of 304 stainless steel and the thickness of the conductive strip is 1-3mm.

[0006] As a further description of the above technical solution, the conductive strip has an extension on the side away from its tab contact end, and the extension has a conductive interface for connecting the test channel line.

[0007] As a further description of the above technical solution, the adjustment structure includes a groove structure disposed on an insulating substrate. The groove structure includes at least one first adjustment groove extending along the length direction of the tab and at least one second adjustment groove extending along the width direction of the tab. The conductive strip is slidably disposed in the first adjustment groove or the second adjustment groove by means of a sliding member.

[0008] As a further description of the above technical solution, the conductive interface is a screw hole, the extension part extends 30-70mm along the length direction of the tab, the conductive interface is opened on the extension part at a position 5-15mm away from the main body of the conductive strip, and the extension part extends 30-70mm on each side along the width direction of the tab.

[0009] As a further description of the above technical solution, the detachable connection structure includes a screw and a screw hole adapted to the screw. The screw hole passes through the conductive strip and the corresponding insulating pad. The screw is screwed into the screw hole to clamp and fix the conductive strip and the insulating pad.

[0010] As a further description of the above technical solution, the size of the insulating pad is adapted to the size of the corresponding conductive strip, and the thickness of the insulating pad is 1-3mm.

[0011] Compared with the prior art, the beneficial effects of this utility model are: The battery cell testing fixture of this utility model has at least one of the following beneficial effects during use: The sliding groove structure allows for bidirectional adjustment of the conductive strip along the length and width of the electrode tabs, accommodating cells with different tab sizes (length, width, and spacing). This eliminates the need for separate fixtures for each specification, reducing equipment costs and improving testing efficiency. The 304 stainless steel conductive strip offers stable conductivity, combining excellent conductivity with corrosion resistance. Its 1-3mm thickness reduces contact resistance, ensuring low-loss signal transmission and improving testing accuracy. The clamping is reliable and protective; the conductive strip and insulating pad are connected via a screw structure, allowing for adjustable clamping force. This ensures tight contact between the electrode tabs while the insulating pad cushions against damage. Operation is convenient; the extension section and conductive interfaces at specific locations facilitate wiring, and the screw structure makes cell placement and positioning simple and effortless. Furthermore, the wooden substrate provides excellent insulation, preventing leakage risks. The material is low-cost and durable, extending the tooling's lifespan. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of a battery cell testing fixture according to the present invention; Figure 2 This is a top view schematic diagram of a battery cell testing fixture according to the present invention; Figure 3This is a partial side view of a battery cell testing fixture according to the present invention. Figure 4 This is a partial perspective structural diagram of a battery cell testing fixture according to the present invention.

[0013] Numbering on the map: 1. Insulating substrate; 2. Conductive strip; 3. Sliding component; 4. Adjustment structure; 5. Detachable connection structure; 6. Extension part; 7. First adjustment groove; 8. Second adjustment groove; 9. Conductive interface; 10. Insulating pad; 11. Screw; 12. Screw hole. Detailed Implementation

[0014] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] like Figure 1-4 As shown, this utility model provides a battery cell testing fixture, comprising: The wooden insulating substrate 1 is used to support the battery cell under test. As an integral supporting structure, the wooden insulating substrate 1 provides a platform for placing the battery cell under test. At the same time, it utilizes the insulating properties of wood to avoid risks such as leakage and short circuit during the test, thus ensuring the safety of the test.

[0016] At least one pair of conductive strips 2 are disposed on the insulating substrate 1. The conductive strips 2 are used to make one-to-one contact with the positive and negative tabs of the battery cell under test. The at least one pair of conductive strips 2 (made of 304 stainless steel) serve as conductive mediums. One end of each strip is in contact with the positive and negative tabs of the battery cell, and the other end is connected to the test channel line through the conductive interface 9 (such as the screw hole 11) of the extension part 6, forming a conductive path of "battery cell tabs → conductive strips 2 → test channel line" to achieve stable transmission of test signals.

[0017] Insulating pads 10 are provided in a one-to-one correspondence with the conductive strips 2.

[0018] An adjustment structure 4 is disposed on the insulating substrate 1, and the voltage conductive strip 2 is slidably connected to the adjustment structure 4 so that the voltage conductive strip 2 can move along the length or width direction of the corresponding tab.

[0019] The adjustment structure 4 (slide groove structure) provides bidirectional adjustment capability for the voltage conductive strip 2: the first adjustment groove 7, extending along the length of the tab, allows the voltage conductive strip 2 to move along the length of the tab to accommodate cells with different tab lengths; the second adjustment groove 8, extending along the width of the tab, allows the voltage conductive strip 2 to move along the width of the tab to accommodate cells with different tab spacing or widths. The voltage conductive strip 2 slides and is fixed within the slide groove via the slider 3, achieving compatibility with cells of different specifications.

[0020] A detachable connection structure 5 passes through the conductive strip 2 and the corresponding insulating pad 10, and is used to detachably fix the conductive strip 2 and the insulating pad 10.

[0021] The conductive strip 2 cooperates with the corresponding insulating pad 10 to clamp the tabs of the battery cell to be tested.

[0022] The conductive strip 2 and the corresponding insulating pad 10 are connected by a detachable connection structure 5 (such as screw 11 and screw hole 12): when screw 11 is tightened, the conductive strip 2 and the insulating pad 10 move closer to each other and clamp the battery cell tabs together to ensure tight contact; when screw 11 is loosened, the tabs can be released, making it easier to put in and take out the battery cell. The insulating pad 10 not only prevents the conductive strip 2 from directly conducting electricity with the substrate, but also buffers the clamping force through flexible contact to prevent the tabs from being damaged.

[0023] Furthermore, the conductive strip 2 is made of 304 stainless steel, and its thickness is 1-3mm. The use of 304 stainless steel for the conductive strip 2 provides both good conductivity and corrosion resistance, ensuring stable test signal transmission. The 1-3mm thickness design ensures structural strength while reducing contact resistance, lowering signal loss, and improving test accuracy. Furthermore, the conductive strip 2 has an extension 6 on the side away from its tab contact end, and the extension 6 has a conductive interface 9 for connecting the test channel line.

[0024] Furthermore, the adjustment structure 4 includes a groove structure disposed on the insulating substrate 1. The groove structure includes at least one first adjustment groove 7 extending along the length direction of the tab and at least one second adjustment groove 8 extending along the width direction of the tab. The conductive strip 2 is slidably disposed in the first adjustment groove 7 or the second adjustment groove 8 via a sliding member 3. The adjustment structure 4 (first and second adjustment grooves 8) enables bidirectional adjustment of the conductive strip 2 in both length and width directions, which can adapt to cell testing with different tab sizes (length, width, and spacing). This eliminates the need to design separate fixtures for each specification of cell, reducing equipment costs and improving testing efficiency.

[0025] Furthermore, the conductive interface 9 is a screw hole with 11 holes. The extension portion 6 extends 30-70mm along the length of the tab. The conductive interface 9 is located on the extension portion 6 at a position 5-15mm away from the main body of the conductive strip 2. The extension portion 6 extends 30-70mm on each side along the width of the tab. The design of the extension portion 6 (30-70mm length) and the conductive interface 9 (screw hole with 11 holes) at a specific position (5-15mm away from the main body) facilitates the connection and fixation of the test channel line and reduces interference to the battery cell during wiring.

[0026] Furthermore, the detachable connection structure 5 includes a screw 11 and a screw hole 12 adapted to the screw 11. The screw hole 12 passes through the conductive strip 2 and the corresponding insulating pad 10. The screw 11 is screwed into the screw hole 12 to clamp and fix the conductive strip 2 and the insulating pad 10. The clamping design of the conductive strip 2 and the insulating pad 10, through the detachable connection structure 5 (screw 11), allows for adjustable clamping force. This ensures close contact between the tab and the conductive strip 2, while the insulating pad 10 provides cushioning to prevent the tab from being damaged by hard compression, thus protecting the integrity of the battery cell.

[0027] Furthermore, the size of the insulating pad 10 is adapted to the size of the corresponding conductive strip 2, and the thickness of the insulating pad 10 is 1-3mm. The detachable connection structure 5 (screw 11) simplifies the handling of the battery cell and the adjustment of the position of the conductive strip 2, reducing the difficulty of manual operation.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A battery cell testing fixture, characterized in that, include: A wooden insulating substrate is used to support the battery cell to be tested; At least one pair of voltage-conducting strips are disposed on the insulating substrate, and the voltage-conducting strips are used to make one-to-one contact with the positive and negative tabs of the battery cell to be tested; Insulating pads are provided one-to-one with the conductive strips; An adjustment structure is disposed on the insulating substrate, and the voltage conductive strip is slidably connected to the adjustment structure so that the voltage conductive strip can move along the length or width direction of the corresponding tab; A detachable connection structure extends through the conductive strip and the corresponding insulating pad, used to detachably fix the conductive strip and the insulating pad; The conductive strip, in conjunction with the corresponding insulating pad, is used to clamp the tabs of the battery cell to be tested.

2. The battery cell testing fixture according to claim 1, characterized in that: The conductive strip is made of 304 stainless steel and has a thickness of 1-3mm.

3. The cell testing fixture according to claim 1, characterized in that: The conductive strip has an extension on the side away from its tab contact end, and the extension has a conductive interface for connecting the test channel line.

4. The battery cell testing fixture according to claim 1, characterized in that: The adjustment structure includes a groove structure disposed on an insulating substrate. The groove structure includes at least one first adjustment groove extending along the length direction of the tab and at least one second adjustment groove extending along the width direction of the tab. The conductive strip is slidably disposed in the first adjustment groove or the second adjustment groove by means of a sliding member.

5. The battery cell testing fixture according to claim 3, characterized in that: The conductive interface is a screw hole. The extension of the extension part along the length of the tab is 30-70mm. The conductive interface is opened on the extension part at a position 5-15mm away from the main body of the conductive strip. The extension part extends 30-70mm on each side along the width of the tab.

6. The battery cell testing fixture according to claim 1, characterized in that: The detachable connection structure includes a screw and a screw hole adapted to the screw. The screw hole passes through the conductive strip and the corresponding insulating pad. The screw is screwed into the screw hole to clamp and fix the conductive strip and the insulating pad.

7. The battery cell testing fixture according to claim 1, characterized in that: The size of the insulating pad is adapted to the size of the corresponding conductive strip, and the thickness of the insulating pad is 1-3mm.

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