Fixture for compressing infiltrated lithium ion battery diaphragm and test method thereof

Abstract

The invention discloses a fixture for compressing an infiltrated lithium ion battery diaphragm, which is characterized by comprising an upper pressure head, a limiting tray and a lower pressure head matched with the upper pressure head. The upper pressure head is arranged at the movable end of a compressor, the lower pressure head is arranged at the fixed end of the compressor, and the limiting tray is arranged at the lower pressure head. According to the invention, the compression performance of the lithium ion battery diaphragm in an infiltration state can be measured more conveniently, so that the lithium ion battery diaphragm is more convenient and tidy, and the influence of uneven placement of the lithium ion battery diaphragm on a compression result is reduced.

Description

technical field [0001] The invention relates to the field of contact measurement, in particular to a fixture for compressing a diaphragm of a lithium-ion battery in a soaked state and a test method thereof. Background technique [0002] Separator is an important component of lithium-ion batteries. Its function is to isolate the positive and negative electrodes to prevent short circuit, and at the same time provide microporous channels for lithium ions to shuttle. The mechanical properties of the separator are very important. Once the strength fails, it is likely to cause short circuit, failure, or even fire and explosion of the battery. Under the infiltration of the liquid electrolyte, the mechanical properties of the separator will be different from those in the dry state. There have been many studies on the tensile properties and dry compression properties of separators, and many scholars have carried out research on the tensile properties and dry compression properties o...

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However, a more effective device and method for the real compression performa

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