How to check the airtightness of lithium-ion batteries?

Introduction How to check the airtightness of lithium-ion batteries? Lithium batteries can be tested for airtightness using an airtightness detector. The detection results of the differential pressure leak detector are more accurate. First of all, it is necessary to.

How to check the airtightness of lithium-ion batteries?

Lithium batteries can be tested for airtightness using an airtightness tester.

The detection results of the differential pressure airtightness detector are more accurate. First of all, it is necessary to make suitable fasteners according to the shape and material characteristics of the battery to seal the battery according to actual needs. , positive pressure or negative pressure can be used. Perform tests. Inflate or evacuate the coin end and after balancing for a while, compare the coin end with the standard tip supplied with the instrument, read the pressure difference and judge the airtightness of the battery through a series of calculations. The specific detection pressure, judgment limit and other parameters should be set according to user needs.

Shenyang Airtel has carried out numerous watertight testsairtightness of batteries, for example by testing the airtightness of new Energy PACK battery packs. Since it itself has an air inlet, it does not require the help of other devices. . Just inflate the inside directly. However, due to the large internal volume of the PACK, in order to shorten the inflation time and improve the detection efficiency, a bypass inflation system is specially equipped for assistance. Generally, the detection pressure is about 3. -20 kPa, the resolution is 0.1 Pa, and the pressure is pressurized for 100 s, the pressure drop is not less than 50 Pa as qualified.

To carry out the airtightness test of lithium-ion batteries, we need to prepare an airtightness detector, customize a set of tools and a set of molds that match exactly to the lithium-ion battery. Install it. air hose and power supply to complete theLithium-ion battery airtightness tester.

The specific test method is as follows:

1. Connect the air tightness detector and the test tool mold through the air source pipe. The air supply pressure to the air source part is. 0.4-1.2 MPA, cannot exceed this range. Connect the power cord, the required voltage is 220V.

2. Set the test parameters according to the test requirements and select the airtightness detector test program according to the set program.

3. Insert the lithium-ion battery product to be tested and start testing. The instrument will automatically determine whether the product is good or defective based on the parameters we set.

The testing methods of different lithium-ion battery airtightness testers are similar. The only difference is that they are customized according to the needs ofhe customers. Some customers choose multi-station because of the high production speed. Or a multi-channel airtightness tester. Some customers' production lines have low output and may choose single station airtightness tester. However, the testing principles are basically the same, but the selection is different. Since the shapes of lithium-ion batteries are different, the tooling molds are all individually customized.

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