Battery test fixture

Abstract

The utility model discloses a battery test fixture, which comprises an upper pressing part, a lower pressing part and a fastening connecting piece, the upper pressing part is connected and fastened with the lower pressing part through the fastening connecting piece, a middle clamping plate is arranged between the upper pressing part and the lower pressing part, and one end, facing the upper pressing part, of the middle clamping plate is connected with the upper pressing part through a spherical support column. According to the utility model, through the arrangement of the middle clamping plate and the spherical supporting column, the upper pressing part transmits pressure to the middle plate through the spherical supporting column, so that the problem that the pressure on the battery is not uniform due to the fact that the upper pressing part and the lower pressing part are not completely horizontal can be avoided, and meanwhile, the spherical supporting column can relatively rotate before pressing; and the pressure uniformity of the upper pressing part on the battery can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing equipment, and more specifically to a battery testing fixture. Background Art

[0002] Lithium-ion batteries have high energy density and safety performance, and are favored by more and more lithium-ion battery manufacturers. However, during the experiment and production process of lithium-ion batteries, the clamps often need to apply pressure to form the battery, divide the capacity and test it. The appropriate clamp state can allow the battery to complete the formation better, form a complete electrode interface, and ensure the full performance of the battery. Gas will be generated during the formation. If the battery is not limited, cavities may occur.

[0003] In the existing technology, the clamp is a common tooling fixture that applies stable pressure to the battery cell. However, it is difficult for the conventional clamp to apply uniform pressure to the entire battery during the formation of the lithium-ion battery. It is easy to have a situation where the pressure is high on one side and low on the other side, resulting in uneven force on the electrode interface during battery formation and testing, limiting the performance of the battery. At the same time, it is difficult to ensure the flatness of the two clamps in the existing technology that are in contact with the battery. Utility Model Content

[0004] The technical problem to be solved by the utility model is how to ensure that the force on the battery is uniform during formation.

[0005] The utility model solves the above-mentioned technical problems through the following technical means: a battery testing fixture, comprising an upper clamping part, a lower clamping part, and a fastening connector, wherein the upper clamping part is fastened to the lower clamping part through the fastening connector, and a middle clamping plate is provided between the upper clamping part and the lower clamping part, and one end of the middle clamping plate facing the upper clamping part is connected to the upper clamping part through a spherical support.

[0006] As a preferred technical solution, one end of the middle clamping plate connected to the spherical support is provided with a lower groove adapted to the spherical support.

[0007] As a preferred technical solution, the upper clamping portion includes an upper clamping plate, and the lower clamping portion includes a lower clamping plate. The upper clamping plate and the lower clamping plate are arranged opposite to each other, and both the upper clamping plate and the lower clamping plate are provided with through holes that are compatible with the fastening connector.

[0008] As a preferred technical solution, the fastening connector includes a fixing screw and a nut. The fixing screw passes through the upper clamping part and the lower clamping part in sequence, and one end passing through the upper clamping part and the lower clamping part is connected and fastened to the upper clamping part and the lower clamping part respectively through nuts.

[0009] As a preferred technical solution, one end of the upper pressing portion connected to the spherical support is provided with an upper groove adapted to the spherical support.

[0010] As a preferred technical solution, the spherical support is arranged at the center of the upper pressing part.

[0011] As a preferred technical solution, the spherical support is also connected to the upper pressing part through a flexible connecting piece.

[0012] As a preferred technical solution, the flexible connecting member is a rope, and the spherical support is circumferentially connected to the upper clamping part through multiple ropes. One end of the rope is fixedly connected to the spherical support, and the other end is fixedly connected to the upper clamping part, and the multiple ropes are redundantly arranged.

[0013] As a preferred technical solution, the flexible connector is a net bag, which is circumferentially fixed to the upper clamping portion and has a notch at its bottom. One end of the spherical support extends out of the notch and is connected to the middle plate.

[0014] As a preferred technical solution, the flexible connecting member is a connecting wire.

[0015] The advantages of the utility model are:

[0016] (1) In the present invention, by providing the middle clamping plate and the spherical support, the upper clamping portion transmits the pressure to the middle plate through the spherical support, thereby avoiding the problem of uneven pressure on the battery caused by the upper clamping portion and the lower clamping portion not being completely horizontal. At the same time, the spherical support can rotate relatively before clamping, thereby ensuring the uniformity of the pressure of the upper clamping portion on the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The overall structural diagram provided for the embodiment of the utility model;

[0018] Figure 2 A front view structural schematic diagram provided for an embodiment of the utility model;

[0019] Figure 3 A bottom-view structural schematic diagram provided for an embodiment of the utility model;

[0020] Figure numbers: 1. Fixing screw; 2. Upper clamping plate; 3. Middle clamping plate; 4. Lower clamping plate; 5. Ball support; 6. Nut; 7. Fixing nut; 8. Connecting wire. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1 A battery testing fixture comprises an upper clamping part, a lower clamping part and a fastening connector. The upper clamping part is fastened to the lower clamping part through the fastening connector. A middle clamping plate 3 is arranged between the upper clamping part and the lower clamping part. One end of the middle clamping plate 3 facing the upper clamping part is connected to the upper clamping part through a ball-type support 5. The ball-type support 5 is arranged at the center of the upper clamping part. In this embodiment, the upper clamping part comprises an upper clamping plate 2, and the lower clamping part comprises a lower clamping plate 4. The battery is placed between the middle clamping plate 2 and the lower clamping plate 4.

[0023] The mating surfaces of the middle clamping plate 3 and the upper clamping plate 2 with the spherical support 5 are respectively provided with a lower groove and an upper groove adapted to the spherical support 5, and part of the spherical support 5 extends into the upper groove and the lower groove, so that the spherical support 5 is limited when the battery is pressed. Of course, only the lower groove or the upper groove can be set.

[0024] See also Figure 2 The fastening connection includes a fixing screw 1 and a nut 6. The fixing screw 1 passes through the upper clamping plate 2 and the lower clamping plate 4 in sequence, and one end of the fixing screw 1 passing through the upper clamping plate 2 and the lower clamping plate 4 is respectively connected and fastened with the upper clamping plate 2 and the lower clamping plate 4 through nuts 6. The fastening connection is arranged at the four corners of the upper clamping plate 2 and the lower clamping plate 4. The upper clamping plate 2 and the lower clamping plate 4 are relatively arranged. The upper clamping plate 2 and the lower clamping plate 4 are both provided with through holes compatible with the fastening connection, and the fixing screw 1 passes through the through holes; wherein the fixing screw 1 can also be a bolt.

[0025] See also Figure 2 The ball support 5 is also connected to the upper splint 2 through a flexible connector. In this embodiment, the flexible connector can be a rope, a connecting line 8, a net bag, etc.

[0026] When the flexible connector is a rope or a connecting line 8, the spherical support 5 is connected to the spherical support 5 by a plurality of ropes in the circumferential direction, one end of the rope is fixedly connected to the spherical support 5, and the other end is fixedly connected to the bottom of the upper clamping plate 2, and the plurality of ropes are redundantly arranged, so that the spherical support 5 can be suspended when the battery is not tested, and when the battery is installed before the test, the flatness of the middle clamping plate 3 is adjusted without affecting the movement of the spherical support 5. In this embodiment, the ropes and connecting lines 8 can be set to 3 or 4, which are distributed at equal angles, but are not limited thereto. When the flexible connector is a connecting line 8, one end of the connecting line 8 is fixedly connected to the bottom of the upper clamping plate 2, and the other end is fixed to the spherical support 5 by a fixing nut 7, and the connecting line 8 is fixedly connected to the fixing nut 7 (not shown in the figure), and a bolt matching the fixing nut 7 is embedded and fixed on the spherical support 5;

[0027] When the flexible connecting member is a net bag, the net bag is fixed to the upper clamping plate 2 in the circumferential direction, a notch is provided at the bottom thereof, and one end of the spherical support 5 leaks out of the notch and is connected to the middle clamping plate 3 .

[0028] It should be noted that the spherical support 5 is a rigid sphere made of metal, ceramic or polymer composite material, and the connecting wire 8 is a metal or polymer material with high strength.

[0029] Directions:

[0030] Place the battery between the middle plate 3 and the lower plate 4, adjust the relative position between the upper plate 3 and the lower plate 4 by fixing the screw 1 and the nut 6, transmit the pressure to the middle plate 3 through the ball support 5 and the upper plate 2, and the middle plate 3 will automatically maintain parallelism with the lower plate 4 when subjected to force.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery testing fixture, characterized in that: It includes an upper clamping part, a lower clamping part, and a fastening connector. The upper clamping part is fastened to the lower clamping part through the fastening connector. A middle clamping plate is provided between the upper clamping part and the lower clamping part. One end of the middle clamping plate facing the upper clamping part is connected to the upper clamping part through a spherical support.

2. A battery testing fixture according to claim 1, characterized in that: One end of the middle clamping plate connected to the spherical support is provided with a lower groove matched with the spherical support.

3. A battery testing fixture according to claim 1, characterized in that: The upper clamping part includes an upper clamping plate, and the lower clamping part includes a lower clamping plate. The upper clamping plate and the lower clamping plate are arranged opposite to each other, and through holes adapted to the fastening connector are provided on the upper clamping plate and the lower clamping plate.

4. A battery testing fixture according to claim 1, characterized in that: The fastening connector includes a fixing screw and a nut. The fixing screw passes through the upper clamping part and the lower clamping part in sequence, and one end of the fixing screw passing through the upper clamping part and the lower clamping part is connected and fastened to the upper clamping part and the lower clamping part respectively through nuts.

5. A battery testing fixture according to claim 1 or 2, characterized in that: An end of the upper pressing part connected to the spherical support is provided with an upper groove matched with the spherical support.

6. A battery testing fixture according to claim 1, characterized in that: The spherical support is arranged at the center of the upper pressing part.

7. A battery testing fixture according to claim 1, characterized in that: The spherical support is also connected to the upper pressing part through a flexible connecting piece.

8. A battery testing fixture according to claim 7, characterized in that: The flexible connecting member is a rope, and the spherical support is circumferentially connected to the upper clamping part through multiple ropes. One end of the rope is fixedly connected to the spherical support, and the other end is fixedly connected to the upper clamping part, and the multiple ropes are redundantly arranged.

9. A battery testing fixture according to claim 7, characterized in that: The flexible connecting piece is a net bag, which is circumferentially fixed to the upper pressing part and has a notch at its bottom. One end of the spherical support sticks out of the notch and is connected to the middle clamping plate.

10. A battery testing fixture according to claim 7, characterized in that: The flexible connecting piece is a connecting line.

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