CN212569019U

CN212569019U - Electricity core testing arrangement

Info

Publication number: CN212569019U
Application number: CN202020266612.6U
Authority: CN
Inventors: 靳永伟; 陆巍巍; 温业勇; 张伟; 周德和
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2020-03-06
Filing date: 2020-03-06
Publication date: 2021-02-19
Anticipated expiration: 2030-03-06

Abstract

The utility model relates to an electricity core testing arrangement, a serial communication port, include: the accommodating module is used for accommodating the battery cell to be tested; the test module is used for testing the insulativity of the electric core to be tested; the accommodating module comprises a battery cell accommodating bin, an insulation detection agent is contained in the battery cell accommodating bin, a battery cell to be detected is placed in the insulation detection agent, and the battery cell to be detected and the insulation detection agent are electrically connected with the testing module. The utility model provides an electric core testing arrangement can simulate electric core when taking place the dewfall phenomenon state, when the accurate measurement appears the dewfall in power battery cell shell, the insulating properties of electric core can be selected the unqualified electric core of insulating properties under the dewfall state effectively at power battery manufacturing phase, prevents that power battery during operation from appearing the safety problem because of the dewfall phenomenon.

Description

Electricity core testing arrangement

Technical Field

The disclosure relates to the field of power battery manufacturing, in particular to a battery cell testing device.

Background

In the process of manufacturing the power battery, since the cell casing is a conductor, in order to ensure the insulation property of the cell casing, a layer of blue film needs to be coated on the surface of the cell casing to ensure the insulation property of the cell. In the use process of the electric automobile, due to temperature changes, the temperature of each part of the power battery can be different, and the phenomenon of condensation often occurs. After the condensation phenomenon occurs, the insulation performance of the battery core is particularly important, no method for quickly and efficiently detecting the insulation performance of the battery core in the condensation state exists at present, and a means for detecting the insulation performance of the battery core in the condensation state when the battery core does not form a power battery is urgently needed.

Disclosure of Invention

The utility model aims at providing an electric core testing arrangement, this equipment can be accurate effectual test out electric core insulating properties under the dewfall state, thereby in time adjust electric core insulating properties in the production process of being convenient for and satisfy the insulating requirement under the dewfall state.

In order to achieve the above object, the present disclosure provides an electrical core testing apparatus, which includes:

the accommodating module is used for accommodating the battery cell to be tested; and the number of the first and second groups,

the test module is used for testing the insulativity of the battery cell to be tested;

the battery cell accommodating module comprises a battery cell accommodating bin, an insulation detection agent is placed inside the battery cell accommodating bin, a battery cell to be detected is placed in the insulation detection agent, and the battery cell to be detected and the insulation detection agent are electrically connected with the testing module.

Optionally, the test module includes at least one insulation tester, and the insulation tester is electrically connected to the electric core to be tested and the insulation detection agent around the electric core to be tested.

Optionally, the insulation tester includes an anode interface and a cathode interface, the anode interface is electrically connected to the anode post of the electric core to be tested, and the cathode interface is electrically connected to the insulation detection agent.

Optionally, the housing module includes at least one of the cell housing compartments, and the cell housing compartments are isolated from or communicated with each other.

Optionally, an upper cover is arranged above each battery cell accommodating bin, and a battery cell fixing hole is formed in the upper cover.

Optionally, one of the electric cores to be tested is placed in each electric core accommodating bin, and the pole part of the electric core to be tested extends out of the upper cover through the electric core fixing hole.

Optionally, the upper cover is made of an elastic insulating material.

Optionally, the area of the cell positioning hole is slightly smaller than the cross-sectional area of the cell to be tested.

Optionally, the insulation detection agent is a conductive liquid, and the conductive liquid is immersed in the battery cell to be detected and is immersed below the upper cover.

Optionally, the insulation detection agent is a soft conductive agent attached to the surface of the shell of the to-be-detected battery cell, and the soft conductive agent is attached to the lower portion of the upper cover.

The utility model provides an electric core testing arrangement can simulate electric core when taking place the dewfall phenomenon state, when the accurate measurement appears the dewfall in power battery cell shell, the insulating properties of electric core can be selected the unqualified electric core of insulating properties under the dewfall state effectively at power battery manufacturing phase, prevents that power battery during operation from appearing the safety problem because of the dewfall phenomenon.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a schematic diagram of an embodiment of a cell testing device.

Description of the reference numerals

1 electric core holds 2 insulation test appearance in storehouse

21 positive electrode interface and 22 negative electrode interface

3 electric core 4 upper cover that awaits measuring

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, the use of directional terms such as "upper, lower, left, right" in the absence of a contrary explanation generally means "above", "below", "left", "right" based on the particular part referred to in the drawings; "inner and outer" refer to "inner" and "outer" based on the particular location indicated in the drawings; "far and near" refers to the distance from a specific part indicated in the drawings.

The present disclosure provides a battery cell testing device, including: the device comprises an accommodating module and a testing module. The battery cell accommodating module is used for accommodating a battery cell 3 to be detected and comprises at least one battery cell accommodating bin 1, wherein an insulation detection agent is arranged inside the battery cell accommodating bin 1 and is made of a conductive material. Electric core holds 1 top in storehouse and is provided with upper cover 4, is provided with electric core fixed orifices on

upper cover

4, and 3 electric cores that await measuring are placed in electric core holds storehouse 1, and 3 utmost point post parts of electric core that awaits measuring run through electric core locating hole, stretch out

upper cover

4, and 3 whole fixed by upper cover 4 of electric core that await measuring, insulating detection agent distribute around 3 electric cores that await measuring to insulating properties's detection under the dewfall state carries out.

The number of the battery cell accommodating bins 1 can be designed according to actual requirements: when a plurality of electric cores 3 to be tested need to be tested simultaneously, a plurality of electric core accommodating bins 1 can be arranged in the accommodating module. The battery cell accommodating bin 1 may be a plurality of separate isolation bins, or a plurality of small isolation bins are formed by separating a single large isolation bin, and each isolation bin may be communicated with or isolated from another isolation bin. In the present embodiment, as shown in fig. 1, a cell accommodating chamber 1 is provided in the accommodating module for testing.

Top cap 4 is made by elastic insulation material, and the area of electric core fixed orifices slightly is less than the cross-sectional area of the electric core 3 that awaits measuring, and after electric core 3 that awaits measuring stretches out upper cover 4 by the electric core fixed orifices, the electric core fixed orifices can be when fixed electric core 3 that awaits measuring, sealed electric core 3 that awaits measuring.

The test module comprises at least one insulation tester 2, each insulation tester 2 comprises a positive electrode interface 21 and a negative electrode interface 22, each insulation tester 2 corresponds to one to-be-tested battery cell 3, namely, each insulation tester 2 is responsible for testing the insulation of one to-be-tested battery cell 3, the positive electrode interface 21 is electrically connected with a positive electrode column of the to-be-tested battery cell 3, and the negative electrode interface 22 is electrically connected with the insulation detection agent.

When 3 insulating nature tests of electric core to be measured, only place one electric core 3 that awaits measuring in every electric core holds storehouse 1, fix in electric core holds storehouse 1 by upper cover 4 to use insulating detection agent to surround electric core 3 that awaits measuring, insulating detection agent can use conducting fluid or software conducting agent.

When the conductive liquid is used, after the electric core 3 to be tested is immersed in the conductive liquid, the conductive liquid can be immersed below the upper cover 4 to the maximum height.

The top cover of each battery cell 3 to be tested is provided with a positive pole column, a negative pole column and an explosion-proof valve, and the explosion-proof valve is used for timely discharging gas inside the battery cell 3 to be tested when the battery cell is out of control due to heat so as to prevent accidents. Since the conductive liquid is liquid, if the top cover of the electric core 3 to be tested is immersed in the testing process, the conductive liquid may enter the electric core 3 to be tested through the explosion-proof valve, and the performance of the electric core 3 to be tested is affected; in addition, after the top cover of the electrical core 3 to be tested is immersed in the conductive liquid, the connection between the conductive liquid and the positive pole or the negative pole of the electrical core 3 to be tested cannot be avoided, which may cause great influence on the test result. Therefore, when the conductive liquid is used as the insulation detection agent 4, the top cover of the battery cell 3 to be tested cannot be immersed in the conductive liquid. After the upper cover 4 seals the electric core 3 to be tested, the conductive liquid cannot contact with the top cover of the electric core 3 to be tested, and the accuracy of the test result is improved.

In the present embodiment, the insulation detection in the dew condensation state of the cell 3 to be detected is performed using the conductive liquid as the insulation detection liquid 4.

When the soft conductive agent is used, the soft conductive agent is required to be coated on the surface of the electric core 3 to be tested, after the electric core 3 to be tested is coated by the soft conductive agent, the height of the soft conductive agent can reach the highest position below the upper cover 4, and after the electric core 3 to be tested is sealed by the upper cover 4, the soft conductive agent cannot be contacted with the top cover of the electric core to be tested, so that the accuracy of a test result is improved.

When the condensation phenomenon occurs in the power battery, condensation phenomena with different degrees can occur at any position of the shell of the battery core, and the generated liquid covers the surface of the blue film to influence the insulation performance of the battery core. The insulation detection liquid 3 is used for simulating the liquid generated when the condensation phenomenon occurs in the working process of the power battery, and the insulation performance of the battery core in the condensation state can be detected ingeniously.

The principle of the present disclosure is: usually, the cell casing and the negative pole of the cell are electrically connected together, the positive pole of the cell is mutually insulated from the cell casing, when the cell casing is coated with a blue film, the cell casing is insulated and isolated from the outside, after the cell casing is coated with the insulation detection liquid 3, the casing cannot be electrically connected with the insulation detection liquid 3 due to the existence of the blue film, and at the moment, the insulation detection liquid 3 is not electrified; when the blue film is in a problem, the shell can be electrically connected with the insulation detection liquid 3, namely, the insulation detection liquid 3 is electrically connected with the battery cell cathode column. If the insulation detector 2 is used for detecting the insulation between the insulation detection liquid 3 and the positive pole of the battery cell, the insulation performance of the battery cell in the dewing state can be indirectly reflected: if the insulation between the insulation detection liquid 3 and the positive pole column of the battery cell is unqualified, namely the insulation performance of the battery cell is unqualified in the dewing state; otherwise, the insulation performance of the battery cell in the dewing state is qualified.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure. It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. A cell testing device, comprising:

2. The cell testing apparatus of claim 1, wherein the testing module comprises at least one insulation tester electrically connected to the cell under test and the insulation detector around the cell under test.

3. The cell testing device of claim 2, wherein the insulation tester comprises a positive interface and a negative interface, the positive interface is electrically connected to the positive post of the cell to be tested, and the negative interface is electrically connected to the insulation testing agent.

4. The cell testing apparatus of claim 1, wherein the housing module comprises at least one of the cell housing compartments, and the cell housing compartments are isolated from or in communication with each other.

5. The cell testing device according to claim 4, wherein an upper cover is disposed above each cell accommodating chamber, and a cell fixing hole is disposed on the upper cover.

6. The cell testing device according to claim 5, wherein one of the cells to be tested is placed in each of the cell accommodating compartments, and a pole portion of the cell to be tested extends out of the upper cover through the cell fixing hole.

7. The cell testing device of claim 5, wherein the upper cover is made of an elastic insulating material.

8. The cell testing device of claim 7, wherein the area of the cell fixing hole is slightly smaller than the cross-sectional area of the cell to be tested.

9. The cell testing device of claim 6, wherein the insulation detection agent is a conductive liquid, and the conductive liquid immerses the cell to be tested to a position below the upper cover.

10. The cell testing device of claim 6, wherein the insulation detector is a soft conductive agent attached to the surface of the casing of the cell to be tested, and the soft conductive agent is attached to the underside of the upper cover.