Soft package battery external short circuit reliability detection device and method

Abstract

The invention discloses a soft package battery external short circuit reliability detection device and method, and the device comprises a voltmeter and a battery cell with the two ends fixedly connected with tabs respectively, the voltmeter is connected with one end of each of a plurality of first alligator clips and second alligator clips, and the other end of each of the first alligator clips and the second alligator clips is connected with the battery cell. The bottom of the battery cell is in contact connection with a plurality of supporting legs, the bottom ends of the supporting legs are fixedly connected with a base, and the top of the base is fixedly connected with a plurality of high-definition cameras in a staggered mode. By using the device and the method, arc discharge or sparking caused by short circuit of an aluminum plastic film during external short circuit of the battery cell can be rapidly and accurately judged, so that the phenomenon of battery cell combustion can be further avoided, and the situation that the reason of failure of external short circuit of the battery cell cannot be found due to the fact that an excitation point cannot be observed by naked eyes is avoided; and convenient conditions are provided for optimizing the cell design and reducing the test workload.

Description

technical field [0001] The invention relates to the technical field of battery detection, in particular to an external short-circuit reliability detection device and method for a pouch battery. Background technique [0002] Lithium-ion batteries have attracted much attention due to their high energy density, high power and long cycle life, and have become one of the mainstream energy storage devices today. They are widely used in electric vehicles, electric bicycles, energy storage, and communication backup power. People are also paying more and more attention to the safety performance of batteries. In view of the complex and changeable use environment, people have designed many abuse test methods to evaluate the normal use of lithium-ion batteries. The external short circuit test is one of the important tests. Soft-pack lithium-ion batteries are different from cylindrical and square aluminum-shell lithium-ion batteries. The latter two have protection devices that can cut o...

AI Technical Summary

Problems solved by technology

Existing testing methods cannot judge the tiny arcing or spark generation of the battery cells, which is an important reason why the batteries are easy to burn or even explode after being grouped together. Therefore, we propose a device and method for detecting the reliability of the external short circuit of the pouch battery to solve the above problems

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