Rapid leakage detection method for lithium battery

Abstract

The invention discloses a rapid leakage detection method for a lithium battery. The rapid leakage detection method comprises the steps of: designing a rapid clamping tooling, which is made of a transparent material; fixing a guide sliding rail on each of the left and right sides of a box type fixing base; fixing a detection needle cylinder to the rear side of the box type fixing base, wherein a position of the detection needle cylinder directly faces a liquid injection hole of the lithium battery; fixing a sealing joint on the sealing cover of the box type fixing base, wherein the sealing joint is communicated with the interior of a plastic outer shell of the lithium battery when the sealing cover seals the front side of the of the box type fixing base, and a hose connected with the outerend of the sealing joint is placed in a transparent bottle filled with water; and observing whether an air bubble exists in the water in the transparent bottle through injecting a positive pressure gas into the detection needle cylinder, so as to determine whether the lithium battery leaks air. By adopting the rapid leakage detection method disclosed by the invention, the rapid clamping and rapidleakage detection of the lithium battery are realized, and the leakage detection equipment is simplified, and the working efficiency is improved.

Description

technical field [0001] The invention relates to a lithium battery rapid leakage detection method in lithium battery preparation, belonging to the technical field of lithium battery preparation. Background technique [0002] Lithium batteries are widely used in electronic products because of their small size, high energy, high working voltage, no environmental pollution, long cycle life, and wide operating temperature range. The preparation process of lithium batteries is generally to make batteries with positive electrodes, negative electrodes and insulating tape, then place the batteries in the battery case, and inject non-aqueous electrolyte into the battery case. After the lithium battery is prepared, it needs to be tested for leaks, mainly to detect whether the electrolyte is leaking. [0003] In the prior art, the negative pressure vacuum leak detection method is commonly used in the lithium battery leak detection method, that is, the vacuum is drawn at the liquid inje...

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Problems solved by technology

[0003] In the prior art, the negative pressure vacuum leak detection method is commonly used in the lithium battery leak detection method, that is, the vacuum is drawn at the liquid injection port. Since the inside of the battery cell is negative pressure, affected by the external pressure, the weld seam and the battery cell The inside is in a tight state, which may block the leaking part, resulting in the inability to detect the leaking cell and causing errors. Moreover, the vacuum equipment in the prior art has a complex structure, from equipment preparation, to cell clamping, to measurement. Leakage and leak detection through the instrument display, it takes too long

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