CN219224873U

CN219224873U - Circulation test fixture

Info

Publication number: CN219224873U
Application number: CN202223375599.6U
Authority: CN
Inventors: 张辉勇; 王易玮; 覃关键
Original assignee: Huiyang Century New Energy Technology Co ltd
Current assignee: Huiyang Century New Energy Technology Co ltd
Priority date: 2022-12-15
Filing date: 2022-12-15
Publication date: 2023-06-20
Anticipated expiration: 2032-12-15

Abstract

The utility model belongs to the technical field of battery production and manufacturing, and particularly relates to a cyclic test fixture, which comprises: a support plate; the lower plate is arranged above the supporting plate; a distance fixing plate fixed above the lower plate; a sensor disposed between the distance fixing plate and the lower plate; a space for accommodating the battery core to be tested is formed between the supporting plate and the lower plate. The utility model can test the expansion thickness of the test battery in the battery cycle process.

Description

Circulation test fixture

Technical Field

The utility model belongs to the technical field of battery production and manufacturing, and particularly relates to a cyclic test fixture.

Background

The lithium ion battery is used as a novel secondary battery, has the advantages of high energy density and power density, high working voltage, light weight, small volume, long cycle life, good safety, environmental protection and the like, and has wide application prospect in the aspects of portable electric appliances, electric tools, large-scale energy storage, electric traffic power sources and the like.

In the battery circulation process, thickness change data of the battery are required to be continuously tested, but the current test fixture cannot accurately test circulation conditions of corresponding thickness of expansion.

Disclosure of Invention

The utility model aims at: aiming at the defects of the prior art, the circulating test fixture is provided, and can test the expansion thickness of a test battery in the battery circulating process.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a cyclic test fixture comprising: a support plate; the lower plate is arranged above the supporting plate; a distance fixing plate fixed above the lower plate; a sensor disposed between the distance fixing plate and the lower plate; a space for accommodating the battery core to be tested is formed between the supporting plate and the lower plate.

Preferably, the device further comprises a supporting rod, wherein one end of the supporting rod is fixed on the supporting plate, and the other end of the supporting rod penetrates through the distance fixing plate.

Preferably, the number of the support rods is four, and two support rods are perpendicular to four corners of the support plate.

Preferably, the width of the lower plate is smaller than or equal to the distance between the two support rods.

Preferably, the support rod is in a rod-shaped structure or a plate-shaped structure.

Preferably, the thickness of the lower plate is smaller than the thickness of the support plate.

Preferably, the lower plate and the support plate are both planar structures on one surface close to the to-be-tested battery cell.

Preferably, the system further comprises a lower computer, wherein the lower computer is connected with the sensor.

Preferably, one surface of the sensor contacts the distance fixing plate, and the other surface of the sensor contacts the lower plate.

Preferably, the sensor is a force sensitive sensor.

The utility model has the beneficial effects that the battery core to be tested is placed between the supporting plate and the lower plate, after the battery core to be tested expands in the battery circulation process, the corresponding expansion rate of the position of the feedback part is recorded and recorded, when all sensors generate pressure change, the integral expansion reaches a preset value, and meanwhile, the expansion rate is fed back and recorded, and finally, the test is stopped, so that the utility model can be understood as recording the circulation times when the battery reaches the thickness, and then stopping the test, thereby meeting the battery state of saving the thickness and providing a basis for further evaluating the battery performance.

Drawings

Features, advantages, and technical effects of exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a first embodiment of the present utility model.

Wherein reference numerals are as follows:

1-a supporting plate;

2-lower plate;

3-distance fixing plate;

4-a sensor;

5-a cell to be tested;

6-supporting rods.

Detailed Description

Certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will appreciate that a hardware manufacturer may refer to the same component by different names. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As used throughout the specification and claims, the word "comprise" is an open-ended term, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art can solve the technical problem within a certain error range, substantially achieving the technical effect.

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 present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 can be understood by those of ordinary skill in the art according to the specific circumstances.

The present utility model will be described in further detail below with reference to fig. 1, but is not limited thereto.

Embodiment one

Embodiment one will be described with reference to FIG. 1

A cyclic test fixture comprising: a support plate 1; a lower plate 2 disposed above the support plate 1; a distance fixing plate 3 fixed above the lower plate 2; a sensor 4 disposed between the distance fixing plate 3 and the lower plate 2; a space for accommodating the battery cell 5 to be tested is formed between the support plate 1 and the lower plate 2.

The thickness change data of the battery is required to be continuously tested in the battery circulation process, but the current test fixture cannot accurately test the circulation condition of the thickness corresponding to expansion, so that the battery core 5 to be tested is placed between the supporting plate 1 and the lower plate 2, the battery core 5 to be tested expands in the battery circulation process, after the supporting plate 1 and the lower plate 2 produce pressure, the corresponding expansion rate of the expansion rate is recorded through recording the positions of the feedback parts, when all the sensors 4 generate pressure change, the integral expansion reaches a preset value, the integral expansion is simultaneously fed back and recorded, and finally, the test is stopped, so that the cycle times when the battery reaches the thickness can be recorded, then the test is stopped, the battery state of the thickness is saved, and a basis is provided for further evaluating the battery performance.

In the present embodiment, the cyclic expansion thickness is set to 5%, 10%, 20% or the like in the distance fixing plate 3, but the present utility model is not limited thereto, and the corresponding cyclic expansion thickness may be adjusted according to the kind of the actual battery. The supporting plate 1, the lower plate 2 and the distance fixing plate 3 are all preferably square plate structures.

In the cyclic test fixture according to the present utility model, the cyclic test fixture further comprises a support rod 6, wherein one end of the support rod 6 is fixed on the support plate 1, which serves to fix the position of the support rod 6, and the other end of the support rod 6 passes through the distance fixing plate 3, and the distance fixing plate 3 is fixed at the position of the support rod 6 by a buckle, which serves to adjust the distance between the lower plate 2 and the distance fixing plate 3.

In the cyclic test fixture according to the present utility model, the number of the support rods 6 is four, and two support rods 6 are perpendicular to the four corners of the support plate 1, but the present utility model is not limited thereto, and the number of the support rods 6 can be increased according to the area of the actual distance fixing plate 3, which is helpful for improving the stability of the distance fixing plate 3.

In the cyclic test jig according to the present utility model, the thickness of the lower plate 2 is smaller than that of the support plate 1, avoiding the lower plate 2 from being excessively thick, contributing to the cost reduction of the jig.

In the cyclic test fixture according to the utility model, one surfaces of the lower plate 2 and the support plate 1, which are close to the battery cell 5 to be tested, are of a planar structure, and the lower plate 2 and the support plate 1 can be prevented from rubbing the battery cell 5 to be tested.

In the cyclic test fixture according to the utility model, a lower computer is also included, which is connected to the sensor 4. Specifically, the lower computer is internally provided with test software, when the overall expansion reaches a preset value, the test software is fed back, the test software records and stops testing, and a tester can perform corresponding test on the battery in the state at the moment to obtain corresponding performance indexes of the battery.

The working principle of the utility model is as follows:

the battery cell 5 to be tested is placed between the supporting plate 1 and the lower plate 2, in the battery circulation process, after the battery cell 5 to be tested expands, the corresponding expansion rate of the position of the feedback part is recorded and recorded after the pressure is produced by the supporting plate 1 and the lower plate 2, when all the sensors 4 generate pressure change, the integral expansion is indicated to reach a preset value, and meanwhile, the expansion rate is fed back and recorded, and finally, the test is stopped, so that the cycle times when the battery reaches the thickness can be recorded, then, the test is stopped, the battery state of the thickness is saved, and a foundation is provided for further evaluating the battery performance.

Second embodiment

Unlike the first embodiment, the following is: the width of the lower plate 2 of the present embodiment is smaller than or equal to the distance between the two support rods 6, the support rods 6 play a limiting role, the lower plate 2 is prevented from shaking left and right, and the support rods 6 are in a rod-shaped structure or a plate-shaped structure.

Other structures are the same as those of the first embodiment, and will not be described here again.

Embodiment III

Unlike the first embodiment, the following is: one surface of the sensor 4 of the present embodiment contacts the distance fixing plate 3, the other surface of the sensor 4 contacts the lower plate 2, the number of the sensors 4 is 4, the sensors 4 are respectively located at four corners of the lower plate 2, and the sensors 4 are force-sensitive sensors. The force sensor is a conversion device for converting mechanical quantities such as stress, pressure and the like into electric signals. The force sensor comprises a resistor type, a capacitor type, an inductance type, a piezoelectric type and a current type, and the main technical performance of the semiconductor pressure sensor is as follows: outputting 3-20 mV/V; the precision is 0.25%; the frequency is 0-5000 Hz; the working temperature is-55-120 ℃, and the advantages are small volume and low cost.

Variations and modifications of the above embodiments will occur to those skilled in the art to which the utility model pertains from the foregoing disclosure and teachings. Therefore, the present utility model is not limited to the above-described embodiments, but is intended to be capable of modification, substitution or variation in light thereof, which will be apparent to those skilled in the art in light of the present teachings. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present utility model in any way.

Claims

1. A cyclic test fixture, comprising:

a support plate (1);

a lower plate (2) arranged above the support plate (1);

a distance fixing plate (3) fixed above the lower plate (2);

a sensor (4) disposed between the distance fixing plate (3) and the lower plate (2);

a space for accommodating the battery cell (5) to be tested is formed between the supporting plate (1) and the lower plate (2).

2. A cyclic test fixture as defined in claim 1, wherein: the device further comprises a supporting rod (6), one end of the supporting rod (6) is fixed on the supporting plate (1), and the other end of the supporting plate (1) penetrates through the distance fixing plate (3).

3. A cyclic test fixture as defined in claim 2, wherein: the number of the supporting rods (6) is four, and two supporting rods (6) are perpendicular to four corners of the supporting plate (1).

4. A cyclical test fixture as defined in claim 3, wherein: the width of the lower plate (2) is smaller than or equal to the distance between the two support rods (6).

5. A cyclic test fixture as defined in claim 2, wherein: the supporting rod (6) is in a rod-shaped structure or a plate-shaped structure.

6. A cyclic test fixture as defined in claim 1, wherein: the thickness of the lower plate (2) is smaller than that of the supporting plate (1).

7. A cyclic test fixture as defined in claim 1, wherein: the lower plate (2) and one surface of the supporting plate (1) close to the battery cell (5) to be tested are both in a plane structure.

8. A cyclic test fixture as defined in claim 1, wherein: the device also comprises a lower computer which is connected with the sensor (4).

9. A cyclic test fixture as defined in claim 1, wherein: one surface of the sensor (4) contacts the distance fixing plate (3), and the other surface of the sensor (4) contacts the lower plate (2).

10. A cyclic test fixture as defined in claim 1, wherein: the sensor (4) is a force sensor.