Ultralarge current battery short circuit test device

Abstract

The invention belongs to the technical field of evaluation devices for the safety performance of a battery, and particularly relates to an ultralarge current battery short circuit test device. In the technical scheme, a vacuum pump needs to be started for vacuumizing before a short circuit test, when vacuum degree collected by a data collecting and controlling module achieves the demands, a computer control module sends a switching value command to the data collecting and control module, and a power pump unit of a vacuum breaker starts or closes a short circuit board, wherein the vacuumizing operation is used for preventing the short circuit board from being oxidated during high-temperature contacting and for not increasing the contacting resistance, so the phenomena of oxidation, sparks and arc pulling during the disconnection existing under the aerobic environment in the prior art are avoided; besides, the copper short circuit is made to be sawtooth-shaped, conductive paste is smeared, so the contacting area and the contacting effect are increased; a short circuit resistor is arranged and an air cooling device is arranged, so stable temperature of the resistor in a loop is ensured and the stable resistance value in the loop is ensured.

Description

technical field [0001] The invention belongs to the technical field of battery safety performance test and evaluation devices, and in particular relates to a super-high current battery short-circuit test device, which is used for short-circuit safety test and evaluation of battery cells, modules and battery packs. Background technique [0002] With the acceleration of the industrialization of new energy vehicles and the vigorous development of the energy storage industry, the safety of batteries is the most important factor to be considered in new energy vehicles and energy storage applications. The short circuit test simulates the positive and negative poles of the battery cell, module or battery pack being connected by a conductor during use, forming a short circuit, which will cause the battery to generate a large amount of heat in a short time, which will cause the diaphragm to melt and generate an internal short circuit, eventually leading to thermal runaway of the batte...

AI Technical Summary

Problems solved by technology

The short circuit test simulates the positive and negative poles of the battery cell, module or battery pack being connected by a conductor during use, forming a short circuit, which will cause the battery to generate a large amount of heat in a short time, which will cause the diaphragm to melt and generate an internal short circuit, eventually leading to thermal runaway of the battery. even catch fire or explode

[0003] Therefore, the short-circuit test is included in the battery test and evaluation standards at home and abroad, but the commonly used short-circuit test device, the line resistance increases sharply with the heat generated by the large current during the short-circuit process, and there is no standardized product for the short-circuit test device, which leads to The short-circuit test results of the same battery product in different test and evaluation institutions vary greatly

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