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Method for testing air tightness of battery boxes

A technology for air tightness test and battery box, which is applied in the direction of using liquid/vacuum for liquid tightness measurement. Quantity and the effect of improving accuracy

Inactive Publication Date: 2018-06-22
CHINA AVIATION LITHIUM BATTERY RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: In order to overcome the problem that the traditional battery box airtightness test method cannot truly reflect the actual use situation and affect the test results, a battery box airtightness test method is provided

Method used

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  • Method for testing air tightness of battery boxes

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Embodiment Construction

[0017] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0018] Such as figure 1 Shown is a method for testing the airtightness of a battery box, the method comprising the following steps:

[0019] (1) Making fillers: according to the size and quantity of battery modules in the battery pack, make fillers to replace the battery modules. The size of the fillers is similar to that of the battery modules. At the same time, the fillers are light and easy to handle , The characteristics of not releasing and absorbing gas, and the volume will not change due to changes in external pressure;

[0020] (2) Place filler: place filler in the battery box so that the proportion of space occupied by the filler in the battery box ...

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Abstract

The invention relates to a method for testing the air tightness of battery boxes. The method has the advantages that preliminarily prepared fillers with the sizes similar to the sizes of battery modules are arranged inside battery box bodies according to the sizes and the quantities of the battery modules before the air tightness of the battery box bodies is tested, then the air tightness of the battery box bodies is tested, accordingly, empty boxes do not need to be tested, the inflating volume of compressed air inside the battery boxes can be reduced to a great extent, and temperature and humidity difference of air inside and outside the box bodies can be lowered; actual use conditions of the battery boxes are simulated, and accordingly the accuracy of test results can be improved.

Description

technical field [0001] The invention relates to the technical field of automobile batteries, in particular to a method for testing the airtightness of a battery box. Background technique [0002] As the core component of electric vehicles, the battery pack is directly related to the safety of the entire vehicle, and its high-level protection performance can effectively prevent the battery pack from entering water and causing insulation failure and causing safety accidents. It is generally required that the protection level of the waterproof battery pack should meet IPX7. Therefore, every part related to the protection performance of the battery pack is required to meet IPX7, and the battery box is the most important part that affects the protection of the battery pack. Battery companies usually hand over the battery box to The outsourced factories produce on an OEM basis, so the outsourced foundries are required to perform an IPX7 performance test on each empty battery box b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/02
CPCG01M3/02
Inventor 唐明涛
Owner CHINA AVIATION LITHIUM BATTERY RES INST CO LTD
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