CN219915880U - Battery cell testing tool - Google Patents

Abstract

The utility model discloses a battery cell testing tool which is characterized by comprising the following components: the first clamping plate is used for supporting the battery cell; the second clamping plate is fixed above the first clamping plate, and a space is formed between the first clamping plate and the second clamping plate; the movable plate is movably arranged between the first clamping plate and the second clamping plate; the transmission unit is arranged between the second clamping plate and the movable plate, can drive the movable plate to apply force to the battery cell and controls the distance between the first clamping plate and the movable plate to be consistent. According to the utility model, the first clamping plate, the second clamping plate, the movable plate and the transmission unit are arranged, and in the cyclic test process of the battery cell, if the battery cell expands, the movable plate is inclined, the movable plate can be adjusted by controlling the transmission assembly until the movable plate returns to the horizontal state again, so that the overall stress balance of the battery cell is ensured, and a series of conditions of overlarge local stress of the battery cell, influence on the cyclic performance of the battery cell and the like are avoided.

Description

Battery cell testing tool

Technical Field

The utility model relates to the technical field of lithium batteries, in particular to a battery cell testing tool.

Background

In recent years, the capacity, sales and market share of the battery cells are continuously increased, the production efficiency, energy density, cycle life, safety reliability and other performances of the battery cells are gradually improved, and the battery cells are tested in a cycle mode, so that the battery cells are tested by using clamps in the cycle mode for simulating the use working conditions of the PACK end.

Currently, a steel clamp or an aluminum clamp is generally used as a clamp for cell circulation, and the clamp is mainly composed of two clamping plates, four screws around, four upright posts, nuts and the like. The clamp is preloaded on the cell in a cyclic manner, typically by using a torque wrench.

Aiming at the existing fixture, when the initial pretightening force is applied to the battery cell, uneven stress in four directions is easily caused, and then the stress of the local battery cell is overlarge, interface deterioration occurs in the circulation process, and the circulation performance of the battery cell is affected.

Disclosure of Invention

Based on this, it is necessary to provide a testing tool for the battery cell according to the above technical problems.

This electricity core test fixture includes:

the first clamping plate is used for supporting the battery cell;

the second clamping plate is fixed above the first clamping plate, and a space is formed between the first clamping plate and the second clamping plate;

the movable plate is movably arranged between the first clamping plate and the second clamping plate;

the transmission unit is arranged between the second clamping plate and the movable plate, can drive the movable plate to apply force to the battery cell and controls the distance between the first clamping plate and the movable plate to be consistent.

In some embodiments, the transmission unit comprises:

the two ends of the telescopic parts are respectively fixed on the second clamping plate and the movable plate.

In some embodiments, the telescoping members are provided in four locations, each located at an end corner of the movable plate.

In some embodiments, the telescoping member is provided as a telescoping hydraulic cylinder.

In some embodiments, the telescoping member is configured as a servo cylinder.

In some embodiments, the cell testing tool further comprises: the horizontal sensor is arranged on the movable plate and connected with the transmission unit, and can send out a signal when the movable plate is in an inclined state.

In some embodiments, the cell testing tool further comprises:

the side plates are arranged on two sides of the movable plate, the upper end parts of the side plates are fixedly connected with the second clamping plates, and the lower end parts of the side plates are fixedly connected with the first clamping plates.

In some embodiments, the side panel, the first clamp panel, and the second clamp panel are integrally connected.

In some embodiments, the side plate is integrally connected with the second clamping plate, and the lower end of the side plate is detachably connected with the first clamping plate.

In some embodiments, the cell testing tool further comprises:

one end of the measuring ruler is connected to the side end part of the first clamping plate in a sliding mode, and one side of the measuring ruler is abutted to the side end part of the movable plate.

Compared with the prior art, the utility model has the beneficial effects that:

through setting up first splint, second splint, fly leaf and drive unit, before carrying out electric core circulation test, place the electric core between first splint and fly leaf earlier, then drive the fly leaf through control drive assembly and press the electric core down to realize the locking of electric core, electric core circulation test in-process, if the electric core appears expanding, the fly leaf takes place the slope, then the fly leaf is adjusted to the accessible control drive assembly, until the fly leaf resumes to the horizontality again, and then guarantee the holistic atress balance of electric core, thereby avoid electric core local atress too big, influence a series of circumstances such as electric core circulation performance.

Drawings

Fig. 1 is a schematic side view of an exemplary embodiment of the present utility model.

In the figure: 1. a first clamping plate; 2. a second clamping plate; 3. a side plate; 4. a movable plate; 5. a telescoping member; 6. a horizontal sensor.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As described in the background art, the existing fixture is generally reinforced by four corners, when the fixture is fastened by using torque wrench fastening screws, the fixture is difficult to ensure that the gaps of the fixture of the battery cell are consistent when the fixture is fastened, the gaps are different, so that the stress degree of the battery cell is uneven, the local interface of the battery cell is deteriorated in the circulation process, the phenomenon of circulating water jump occurs, whether the battery cell is unevenly stressed or not can not be detected in the circulation process, the expansion thickness of the battery cell circulation can not be monitored by the constant pressure, and the optimal expansion space in the circulation process of the battery cell can not be provided.

The utility model aims to solve the problems that the stress is uneven when a clamp on a battery cell is tested, the battery cell is not deformed in the circulation process, so that the local stress of the battery cell is overlarge, and the circulation water jump occurs. In order to improve the above-mentioned problems, referring to fig. 1, the present utility model provides a testing fixture for a battery cell, which mainly includes a first clamping plate 1, a second clamping plate 2, a side plate 3, a movable plate 4, a transmission unit and a horizontal sensor 6.

Specifically, in the exemplary embodiment, the first clamping plate 1 is formed in a square plate-shaped structure, and in the process of the present utility model, the first clamping plate 1 is horizontally placed and used for supporting the battery cells.

Specifically, in the exemplary embodiment, the second clamping plate 2 is formed in a square plate-like structure and is located directly above the first clamping plate 1, and a space is formed between the second clamping plate 2 and the first clamping plate 1. Further, the two side plates 3 are specifically provided and are respectively arranged at two sides of the second clamping plate 2, wherein the upper ends of the two side plates 3 are respectively and integrally connected with two side ends of the second clamping plate 2, and the lower ends of the two side plates 3 are respectively and integrally connected with two side ends of the first clamping plate 1, namely, the first clamping plate 1, the second clamping plate 2 and the two side plates 3 are formed into square tubular structures with two open sides. Before the battery cell circulation test is carried out, the battery cell is placed between the first clamping plate 1 and the movable plate 4, and then the movable plate 4 is driven to lower the battery cell by controlling the transmission component, so that the locking of the battery cell is realized.

In other embodiments, the side plate 3 is integrally connected with the second clamping plate 2, and the two form a U-shaped plate-shaped structure, and the lower end part of the side plate 3 is detachably connected with the first clamping plate 1 through a flange. The utility model is convenient for replacing parts such as a transmission unit and the like, and further comprises a measuring ruler, wherein the lower end part of the measuring ruler is in sliding connection with the side end part of the first clamping plate 1 in a sliding block and sliding groove mode, and one side of the measuring ruler is abutted against the side end part of the movable plate 4. Can measure the interval everywhere between fly leaf 4 and the first splint 1 after curb plate 3 and first splint 1 are connected through setting up the dipperstick to the interval between fly leaf 4 and the first splint 1 is invariable to accessible adjusting flange bolt elasticity degree control, and then guarantees the atress balance of electric core.

Specifically, in the exemplary embodiment, the movable plate 4 is formed in a square plate-like structure, the movable plate 4 is disposed between the first clamping plate 1 and the second clamping plate 2, and both side ends of the movable plate 4 are slidably abutted against the inner walls of the both side plates 3.

Specifically, in the exemplary embodiment, the transmission unit is disposed between the second clamping plate 2 and the movable plate 4, which can drive the movable plate 4 to apply force to the battery cell, and control the distance between the first clamping plate 1 and the movable plate 4 to be consistent. Further, the transmission unit comprises four telescopic members 5, the four telescopic members 5 are respectively located at the end corners of the movable plate 4, and two ends of each telescopic member 5 are respectively fixed on the second clamping plate 2 and the movable plate 4, and when the telescopic members 5 are extended or shortened, the movable plate 4 can be driven to move downwards or upwards. Further, the telescopic member 5 is specifically provided as a telescopic hydraulic cylinder. In the cell cycle test process, if the cell expands, the movable plate 4 inclines, and the movable plate 4 can be adjusted by controlling the telescopic piece 5 until the movable plate 4 returns to the horizontal state again, so that the overall stress balance of the cell is ensured.

In other embodiments, the number of the telescopic members 5 may be more and evenly distributed between the second clamping plate 2 and the movable plate 4, so that the adjustment of the transmission unit is more accurate.

In other embodiments, the telescoping member 5 may also be a servo cylinder.

Specifically, in the exemplary embodiment, the horizontal sensor 6 is fixed to a side of the movable plate 4 facing away from the first clamping plate 1, and is specifically disposed in the middle of the movable plate 4, where the horizontal sensor 6 is connected to the plurality of telescopic members 5, and is capable of sending signals to the plurality of telescopic members 5 when the movable plate 4 is in an inclined state, and controlling the telescopic members 5 to extend or contract. Thereby further improving the accuracy of balance adjustment.

To sum up, before carrying out the battery cell circulation test, place the battery cell between first splint 1 and fly leaf 4 first, then drive fly leaf 4 through control transmission subassembly and descend the battery cell to realize the locking of battery cell, in the battery cell circulation test process, if the battery cell appears expanding, then the fly leaf 4 is adjusted to the accessible control transmission subassembly to the activity board 4, and then the holistic atress balance of battery cell is guaranteed to a series of circumstances such as avoiding the local too big, influence battery cell circulation performance of battery cell of being compressed.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The utility model provides a electricity core test fixture which characterized in that includes:

the first clamping plate is used for supporting the battery cell;

the second clamping plate is fixed above the first clamping plate, and a space is formed between the first clamping plate and the second clamping plate;

the movable plate is movably arranged between the first clamping plate and the second clamping plate;

the transmission unit is arranged between the second clamping plate and the movable plate, can drive the movable plate to apply force to the battery cell, and controls the distance between the first clamping plate and the movable plate to be consistent.

2. The cell testing tool according to claim 1, wherein the transmission unit comprises:

the two ends of the telescopic parts are respectively fixed on the second clamping plate and the movable plate.

3. The electrical core testing tool according to claim 2, wherein four telescopic members are arranged at the end corners of the movable plate respectively.

4. The cell testing tool according to claim 2, wherein the telescopic member is provided as a telescopic hydraulic cylinder.

5. The cell testing tool according to claim 2, wherein the telescopic member is provided as a servo cylinder.

6. The cell testing tool of any one of claims 1-2, further comprising: the horizontal sensor is arranged on the movable plate and connected with the transmission unit, and can send out a signal when the movable plate is in an inclined state.

7. The cell testing tool of claim 1, further comprising:

the side plates are arranged on two sides of the movable plate, the upper end parts of the side plates are fixedly connected with the second clamping plates, and the lower end parts of the side plates are fixedly connected with the first clamping plates.

8. The cell testing tool of claim 7, wherein the side plate, the first clamping plate and the second clamping plate are integrally connected.

9. The battery cell testing tool according to claim 7, wherein the side plate is integrally connected with the second clamping plate, and the lower end portion of the side plate is detachably connected with the first clamping plate.

10. The cell testing tool of claim 1, further comprising:

one end of the measuring ruler is connected to the side end part of the first clamping plate in a sliding mode, and one side of the measuring ruler is abutted to the side end part of the movable plate.