Impedance test method and device for battery pole piece

Abstract

The invention relates to the technical field of an impedance test method and an impedance test device, in particular to an impedance test method and an impedance test device for a battery pole piece. The impedance test method for the battery pole piece comprises the following steps of: testing by using an impedance tester, testing an inner resistance of the impedance tester and a total resistanceof an upper pressing head and a lower pressing head, and changing pressure on the pole piece frequently and measuring a resistance of the pole piece for many times. An impedance test device for the battery pole piece comprises a stander and a fixing mechanism, wherein the fixing mechanism comprises a pressurizing mechanism, the upper pressing head, the lower pressing head and a base plate; the upper pressing head comprises a pressing head and an insulation ring; a protrusion is formed at one end of the pressing head; the insulation ring matched with the protrusion is sleeved on the protrusion; a positioning slot matched with the upper pressing head is formed at one end of the lower pressing head; the base plate is fixed on the stander; a sliding slot is formed on the base plate; and the other end, matched with the sliding slot, of the lower pressing head is arranged in the sliding slot. The invention has the advantages of high test precision, high consistency of the test data, simple operation, high reliability and avoiding of interferences of human factors.

Description

technical field [0001] The present invention relates to the technical field of an impedance testing method and device, in particular to a battery pole sheet impedance testing method and device. Background technique [0002] Due to the constraints of today's energy and environmental issues, it will become a trend for people to gradually choose battery-powered vehicles. Power battery is an important part of electric vehicles and a key component that affects the overall performance of vehicles. The development and production of batteries is an important factor restricting the development of the entire electric vehicle industry. Since the performance of the pole piece directly affects the internal resistance of the finished battery, engineers need to perform impedance tests on the pole piece during the battery development and production process. The main component of the pole piece is graphite, and the impedance per square centimeter is milliohm level. High expectations. The C...

AI Technical Summary

Problems solved by technology

Although the test method of the patent of the present invention is simple, the structure is simple, and the use of materials is economical, the above-mentioned invention patent does not take into account the contact area and contact pressure measured by the pole piece, and there are some human factors. These uncertain factors can easily lead to inaccurate test results. Accurate, large deviation, poor test data consistency

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