Large cylindrical battery current test fixture

Abstract

The utility model relates to the technical field of cylindrical battery testing, in particular to a large cylindrical battery current testing clamp which comprises a testing seat, a placing groove is formed in the bottom of the testing seat, a contact part is fixedly installed at the bottom of the placing groove, a positive electrode probe is fixedly installed on one side of the contact part, and a telescopic rod is fixedly installed in the bottom of the testing seat. The end portion of the telescopic rod penetrates and extends into the placing groove and is fixedly provided with a clamping plate, sliding grooves are formed in the two ends of the upper side of the testing seat, sliding blocks are arranged in the sliding grooves in a sliding mode, a limiting plate is fixedly installed between the sliding blocks, and a clamping mechanism is movably arranged on one side of the testing seat. The large cylindrical battery current test clamp can clamp batteries of different sizes in the use process, is convenient for testing batteries of different models, and is worthy of popularization.

Description

Technical Field

[0001] This utility model relates to the field of cylindrical battery testing technology, and in particular to a large cylindrical battery current testing fixture. Background Technology

[0002] A large cylindrical battery comprises a core made of a negative electrode, a separator, and a positive electrode, a housing to house the core, and a top cover that seals the top opening of the housing. During the production process, the battery's current performance is tested, requiring the use of suitable clamps to hold and secure the battery. However, different battery models vary in height and diameter, making it inconvenient to use clamps adapted to different battery models for testing. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies that make it inconvenient to test different battery models, and to propose a large cylindrical battery current testing fixture.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A large cylindrical battery current testing fixture is designed, including a test base. A placement groove is formed at the bottom of the test base, and a contact part is fixedly installed at the bottom of the placement groove. A positive electrode probe is fixedly installed on one side of the contact part. A telescopic rod is fixedly installed inside the bottom of the test base, and the end of the telescopic rod extends through the placement groove and is fixedly fitted with a clamping plate. Sliding grooves are formed inside both ends of the upper side of the test base, and sliders slide within the sliding grooves. A limiting plate is fixedly installed between the sliders. A bolt is threadedly connected to one side of the slider. A locking mechanism is movably provided on one side of the test base, and a negative electrode probe is fixedly installed at the end of the locking mechanism.

[0006] Preferably, the snap-fit ​​mechanism includes a support rod, a through hole is provided inside the side wall of the test base, the support rod is slidably disposed in the through hole, a snap-fit ​​connector is fixedly installed at the inner end of the support rod extending to the inner side of the test base, the negative electrode probe is fixedly installed inside the snap-fit ​​connector, a spring is sleeved on the outer side of the inner end of the support rod, one end of the spring is fixedly connected to the snap-fit ​​connector and the other end is in contact with the side wall of the test base, and a limit block is fixedly installed at the outer end of the support rod.

[0007] Preferably, the length direction of the support rod is perpendicular to the side of the test seat, and the length direction of the support rod is parallel to the length direction of the telescopic rod.

[0008] Preferably, the width of the limiting block is smaller than the diameter of the support rod, two limiting blocks are provided and located on both sides of the support rod, and the limiting blocks cooperate with the inside of the through hole.

[0009] Preferably, the negative electrode probe is L-shaped, with its upper end coinciding with the length direction of the support rod and extending through to the outer side of the end of the connector, and its lower end having a length direction perpendicular to the width direction of the through hole.

[0010] Preferably, the groove is vertically oriented along its length.

[0011] Preferably, the clamp is arc-shaped and its surface is fixedly fitted with an anti-slip layer.

[0012] The present invention provides a large cylindrical battery current testing fixture with the following advantages: During use, the fixture can limit and fix the position of the battery along its length through the limiting plate, and can clamp and fix the outer side of the battery through the clamping plate. It can clamp batteries of different diameters and heights, and can drive the negative electrode probe to move through the snap-fit ​​mechanism, allowing the negative electrode probe to be adapted to batteries of different diameters. This testing fixture can clamp and fix batteries of different models, facilitating testing. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a large cylindrical battery current testing fixture proposed in this utility model;

[0014] Figure 2 This is a schematic cross-sectional view of a large cylindrical battery current testing fixture proposed in this utility model.

[0015] Figure 3 This is a longitudinal sectional view of a large cylindrical battery current testing fixture proposed in this utility model.

[0016] Figure 4 This is a three-dimensional structural diagram of the clamping mechanism in a large cylindrical battery current testing fixture proposed in this utility model.

[0017] In the diagram: 1. Test base; 2. Placement slot; 3. Telescopic rod; 4. Clamping plate; 5. Contact seat; 6. Slide groove; 7. Slider; 8. Limiting plate; 9. Through hole; 10. Support rod; 11. Limiting block; 12. Spring; 13. Snap connector; 14. Negative probe; 15. Positive probe. Detailed Implementation

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Example 1: Refer to Figure 1-4A large cylindrical battery current testing fixture includes a test base 1. The bottom of the test base 1 has a placement groove 2 for accommodating the positive terminal of the battery. A contact part 5 is fixedly installed at the bottom of the placement groove 2, and the contact part 5 contacts the positive terminal cap of the battery. A positive probe 15 is fixedly installed on one side of the contact part 5. The positive probe 15 can be electrically connected to the positive terminal cap of the battery through the contact part 5. The contact part 5 is a structure with conductive function in the prior art.

[0020] A telescopic rod 3 is fixedly installed at the bottom of the test fixture 1. The end of the telescopic rod 3 extends through the placement groove 2 and is fixedly installed with a clamping plate 4. The clamping plate 4 is arc-shaped and can be moved by the telescopic rod 3. The clamping plate 4 can hold the cylindrical battery. An anti-slip layer made of rubber is fixedly installed on its surface. The anti-slip layer increases the friction between the clamping plate 4 and the battery, improving the stability of battery clamping. In addition, the anti-slip layer also has an insulating function, improving the safety of the fixture during the testing process.

[0021] The test base 1 has grooves 6 inside both ends on the upper side. The grooves 6 are vertically set in the length direction. A slider 7 is slidably installed inside the groove 6. A limiting plate 8 is fixedly installed between the sliders 7. The limiting plate 8 can slide in the groove 6 through the sliders 7. A bolt is threaded to one side of the slider 7. The position of the slider 7 can be fixed by the bolt. The height of the limiting plate 8 can be adjusted according to the specific height of the battery.

[0022] A latching mechanism is movably provided on one side of the test holder 1. A negative electrode probe 14 is fixedly installed at the end of the latching mechanism. The position of the negative electrode probe 14 can be adjusted through the latching mechanism, allowing the negative electrode probe 14 to contact the negative electrode portion on the side of batteries of different diameters. The tester can connect the testing equipment to the exposed positive electrode probe 15 and negative electrode probe 14 to detect the battery current.

[0023] Working principle: During use, the positive terminal of the battery is placed in the placement slot 2, and the positive cap of the battery contacts the contact seat 5, so that the positive probe 15 is electrically connected to the positive terminal of the battery. Press the limiting plate 8 to fix the battery, start the telescopic rod 3 to drive the clamping plate 4 to clamp the battery, and then tighten the bolt to fix the slider 7, thus completing the clamping and fixing of the battery. It can clamp batteries of different diameters and heights. Then, the negative probe 14 is moved by the snap-fit ​​mechanism, so that the negative probe 14 contacts the negative terminal of the battery. The tester can connect the testing equipment to the positive probe 15 and the negative probe 14 to test the battery.

[0024] Example 2: In Example 1, the snap-fit ​​mechanism adjusts the position of the negative electrode probe 14, allowing the negative electrode connector 14 to contact the negative electrodes of batteries with different diameters. The structure of the snap-fit ​​mechanism is not limited, as long as it can adjust the position of the negative electrode probe 14. This example provides an implementation of the snap-fit ​​mechanism. (Refer to...) Figure 1 and Figure 3-4 As another preferred embodiment of this utility model, based on embodiment 1, the snap-fit ​​mechanism includes a support rod 10. A through hole 9 is provided inside the side wall of the test base 1. The support rod 10 is slidably disposed in the through hole 9. The length direction of the support rod 10 is perpendicular to the side of the test base 1 and parallel to the length direction of the telescopic rod 3. A snap-fit ​​connector 13 is fixedly installed at the inner end of the support rod 10 extending to the inner side of the test base 1. A negative electrode probe 14 is fixedly installed inside the snap-fit ​​connector 13. The negative electrode probe 14 is L-shaped. Its upper end overlaps with the length direction of the support rod 10 and extends through to the outer side of the end of the snap-fit ​​connector 13. The length direction of its lower end is perpendicular to the width direction of the through hole 9. The upper end of the negative electrode connector 14 can contact the negative electrode part of the battery. The lower end of the negative electrode connector 14 is exposed outside the snap-fit ​​connector 13, which facilitates connection with the testing equipment. A spring 12 is sleeved on the outer side of the inner end of the support rod 10. One end of the spring 12 is fixedly connected to the snap-fit ​​connector 13, and the other end contacts the side wall of the test base 1. The spring 12 can provide elastic support between the snap-fit ​​connector 13 and the test base 1, so that the snap-fit ​​connector 13 always has an elastic tendency to move away from the test base 1. (See attached image) Figure 4 As shown, a limiting block 11 is fixedly installed at the outer end of the support rod 10. The width of the limiting block 11 is smaller than the diameter of the support rod 10. Two limiting blocks 11 are provided and located on both sides of the support rod 10. The limiting blocks 11 cooperate with the interior of the through hole 9. (See attached diagram.) Figure 4 In order to facilitate the display of the internal shape of the through hole 9 and the positional relationship between the structures, the test seat 1 is cut and the support rod 10 is cut off. The cut surfaces are filled with cross-sectional lines.

[0025] Appendix Figure 4The diagram shows the negative electrode probe 14 in its retracted and fixed state. The locking connector 13 is in contact with the outer side of the test base 1, and the locking connector 13 is offset from the through hole 9, preventing the support rod 10 from moving inward to the test base 1. At this time, the negative electrode probe 14 is furthest from the battery and does not contact it, which facilitates battery disassembly and replacement. After the battery is fixed by the limiting plate 8 and the clamping plate 4, rotating the support rod 10 drives the limiting block 11, spring 12, locking connector 13, and negative electrode probe 14 to rotate. During rotation, the spring 12 will deform due to the frictional resistance of the side wall of the test base 1. However, the spring 12 is set around the support rod 10 as a whole, so even if it deforms, it will not detach from the support rod 10 and can always provide elastic force to the locking connector 13. After rotation, the limiting block 11 can enter the through hole 9, allowing the support rod 10 to easily penetrate the inner side of the test base 1. The movement of the support rod 10 will drive the negative electrode probe 14 closer to the battery via the snap-fit ​​connector 13. Under the elastic action of the spring 12, the upper end of the negative electrode probe 14 will abut against the negative electrode of the battery, making it suitable for batteries of different diameters. At this time, the exposed end of the negative electrode probe 14 is biased to one side, facilitating connection with the testing equipment.

[0026] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A large cylindrical battery current testing fixture, comprising a test base (1), characterized in that, The test base (1) has a placement groove (2) at the bottom, and a contact part (5) is fixedly installed at the bottom of the placement groove (2). A positive electrode probe (15) is fixedly installed on one side of the contact part (5). A telescopic rod (3) is fixedly installed inside the bottom of the test base (1). The end of the telescopic rod (3) extends through into the placement groove (2) and is fixedly installed with a clamping plate (4). The test base (1) has sliding grooves (6) at both ends on the upper side. A slider (7) is slidably installed inside the sliding groove (6). A limiting plate (8) is fixedly installed between the sliders (7). A bolt is threadedly connected to one side of the slider (7). A locking mechanism is movably provided on one side of the test base (1). A negative electrode probe (14) is fixedly installed at the end of the locking mechanism.

2. The large cylindrical battery current testing fixture according to claim 1, characterized in that, The snap-fit ​​mechanism includes a support rod (10), and a through hole (9) is provided inside the side wall of the test seat (1). The support rod (10) is slidably disposed in the through hole (9). A snap-fit ​​connector (13) is fixedly installed on the inner end of the support rod (10) extending to the inner side of the test seat (1). The negative electrode probe (14) is fixedly installed inside the snap-fit ​​connector (13). A spring (12) is sleeved on the outer side of the inner end of the support rod (10). One end of the spring (12) is fixedly connected to the snap-fit ​​connector (13), and the other end is in contact with the side wall of the test seat (1). A limit block (11) is fixedly installed on the outer end of the support rod (10).

3. The large cylindrical battery current testing fixture according to claim 2, characterized in that, The length direction of the support rod (10) is perpendicular to the side of the test seat (1), and the length direction of the support rod (10) is parallel to the length direction of the telescopic rod (3).

4. The large cylindrical battery current testing fixture according to claim 3, characterized in that, The width of the limiting block (11) is smaller than the diameter of the support rod (10). There are two limiting blocks (11) located on both sides of the support rod (10). The limiting blocks (11) cooperate with the inside of the through hole (9).

5. The large cylindrical battery current testing fixture according to claim 4, characterized in that, The negative probe (14) is L-shaped, with its upper end overlapping the length direction of the support rod (10) and extending through to the outer side of the end of the connector (13), and its lower end having a length direction perpendicular to the width direction of the through hole (9).

6. The large cylindrical battery current testing fixture according to claim 1, characterized in that, The groove (6) is set vertically along its length.

7. The large cylindrical battery current testing fixture according to claim 1, characterized in that, The clamp (4) is arc-shaped and has an anti-slip layer fixedly installed on its surface.

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