Precise testing device of safety valve of cylindrical lithium-ion battery

Abstract

The invention relates to a precise testing device of a safety valve of a cylindrical lithium-ion battery, which comprises a press seat, a base and a control system. An elastic contact is respectively arranged in the cavities of the press seat and the base, the two elastic contacts are both connected with the control system to test the internal resistance and the welding point breaking pressure ofa safety valve; the hollow cavity of the base is communicated with an air intake pipe, a pressure sensor, a solenoid valve, a progressive switch, a pressure gauge and a pressure-stabilizing air source are arranged on the air intake pipe, wherein the pressure sensor, the solenoid valve and the progressive switch are connected with the control system to test the turning pressure and the bursting pressure of the safety valve; and a press sensor connected with the control system is arranged on the elastic contact of the press seat or the base for control. The invention realizes the testing of multiple indicators with one safety valve at one step, achieves convenient, rapid and high-precision testing, avoids the error caused by manual operation and the influence of the equipment sensitivity ontesting, and also has the advantages of small testing error and low material consumption for testing.

Description

technical field [0001] The invention relates to a test device for a battery safety valve, in particular to a multi-performance integrated precision test device for a cylindrical lithium-ion battery safety valve. Background technique [0002] Cylindrical lithium-ion battery safety valve (hereinafter referred to as safety valve) is a control device for battery safety performance of portable electronic products, electric tools, and high-end precision instruments. It is composed of upper cap, throttle valve, explosion-proof membrane, and orifice plate through the seal Combined precision parts, laser welding of orifice plate and explosion-proof membrane, two air holes are set on the orifice plate. During abnormal use, a large amount of gas inside the battery expands rapidly, and the explosion-proof membrane of the safety valve withstands the pressure and bursts to release the pressure. Otherwise, the battery may explode and cause accidental injury. Therefore, the disconnection o...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the influence of human factors and equipment sensitivity on test results in the prior art, as well as the shortcomings of multiple performance tests on multiple safety valves, low test accuracy, cumbersome operation, low work efficiency, and many consumables. And provide a cylindrical lithium-ion battery safety valve precision testing device that can complete multiple performance tests on the same safety valve at one time, with high test accuracy, convenient operation, high work efficiency, and less consumables

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