Waterproof detection method for battery pack

A detection method and a technology of a battery pack, which are applied in the direction of detecting the appearance of fluid at the leakage point, measuring the increase and decrease rate of the fluid, and using liquid/vacuum to measure the liquid tightness, etc., can solve the problem of time-consuming, labor-intensive, and high-efficiency Inefficient and other problems, to achieve the effect of convenient detection, high detection efficiency, saving manpower and material resources

Inactive Publication Date: 2017-02-22
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a battery pack waterproof detection method, which solves the technical problems of time-consuming, labor-intensive and low-efficiency detection methods of the battery pack waterproof performance in the prior art

Method used

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  • Waterproof detection method for battery pack

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Effect test

Embodiment 1

[0025] The battery pack waterproof detection method of this embodiment includes the following steps:

[0026] S1. Assemble the battery pack according to the waterproof level of IPX7;

[0027] S2. Connect the air tightness detector to the battery pack and the air source, and the relative humidity of the air source is 75%, to obtain a battery pack that has passed the air tightness test and a battery pack that has failed the air tightness test;

[0028] S3, using the humidity card detection step S2 to airtightly detect the leaking position of the unqualified battery pack, and process the leaking position of the battery pack;

[0029] S4. Repeat steps S1-S3 for the battery pack processed in step S3 until the airtight test is qualified;

[0030] S5. Perform a waterproof test on the battery packs that pass the airtight test in step S2.

[0031] In step S2, the air tightness detector is connected to the battery pack and the air source, and the air source with a relative humidity of...

Embodiment 2

[0033] The battery pack waterproof detection method of this embodiment includes the following steps:

[0034] S1. Assemble the battery pack according to the waterproof level of IPX7;

[0035] S2. Connect the air tightness detector to the battery pack and the air source, and the relative humidity of the air source is 80%, the air source is charged into the battery pack, the detected air pressure is 5KPa, the pressure is maintained for 90s, the air leakage rate is 92Pa, and the air leakage rate is tested If it is less than 150Pa, the result is qualified, and the battery pack that passes the airtight test is obtained;

[0036] S3. Conduct the waterproof test on the battery pack that passed the airtight test in step S2. Put the battery pack in 1m deep water and let it stand for 30 minutes. Then, take it out of the water, open the box, and find that there is no water leakage, that is, the waterproof test is qualified.

Embodiment 3

[0038] The battery pack waterproof detection method of this embodiment includes the following steps:

[0039] S1. Assemble the battery pack according to the waterproof level of IPX7;

[0040] S2. Connect the air tightness detector to the battery pack and the air source, and the relative humidity of the air source is 85%, the air source is charged into the battery pack, the detected air pressure is 4.2KPa, the pressure is maintained for 90s, the air leakage rate is 160Pa, and the air leakage is checked rate is greater than 150Pa, the result is unqualified, and the battery pack that fails the air tightness test is obtained;

[0041] S3. For the battery pack that fails the air tightness test, use the humidity card to detect the leak position, and find that there is a screw position on the flange side of the battery pack box, the humidity card shows the color, open the box cover and find that the sealing ring here has been damaged , replace the sealing ring;

[0042] S4. Repeat ...

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Abstract

The invention provides a waterproof detection method for a battery pack, and relates to the technical field of batteries. The method includes airtightness pre-detection and waterproof test of the battery pack; and concretely comprises that the battery pack is assembled, airtightness detection is carried out, waterproof test is carried out on the battery pack which passes airtightness detection, a humidity card is used to detect a leakage position in the battery pack which fails in airtightness detection, the leakage position is processed, and the above steps are repeated till the battery pack passes the airtightness detection. Thus, waterproof test is not carried out on the battery pack directly, and batteries and other electrical members are prevented from both immersion caused by the battery pack and influence on the electric performance; and the waterproof test is carried out on the battery pack repeatedly, the labor and material cost are reduced, and the detection efficiency is high.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a waterproof detection method for a battery pack. Background technique [0002] With the rapid development of the electric vehicle industry, the safety of the power battery as the core component of electric vehicles directly affects the safety of the entire vehicle. The dustproof and waterproof performance of the battery pack is particularly important. Among them, the waterproof performance of the battery pack, especially IPX7, is one of the very important performances. If the battery pack enters water, it will cause the insulation failure of the battery pack and cause damage to the internal components, even if the water is dry. It may also affect the electrical characteristics of the battery. [0003] However, there are many factors that affect the waterproof performance of the battery pack. The conventional method of testing the waterproof performance of the battery pack is ...

Claims

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Application Information

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IPC IPC(8): G01M3/26G01M3/04
CPCG01M3/26G01M3/04
Inventor 李寿年张敏徐霁旸
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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