A battery impedance test tool set and test method

The design of the battery impedance testing fixture simplifies the battery impedance testing process, solves the problems of high cost and low reliability in existing technologies, and achieves efficient and reliable testing across the entire SOC range.

CN115792645BActive Publication Date: 2026-05-29SVOLT ENERGY TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202211102195.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-09-09
Publication Date
2026-05-29
Estimated Expiration
2042-09-09

AI Technical Summary

Technical Problem

Existing technologies for battery impedance testing are costly and time-consuming, and the test results are unreliable. In particular, testing across the entire SOC range requires the fabrication of multiple batteries and complex symmetrical battery structures.

Method used

A battery impedance testing fixture is provided, including first and second fixtures. A battery cell is formed by stacking positive and negative electrode sheets, and electrolyte is added into the fixture to form a battery and a symmetrical battery, simplifying the testing process to achieve impedance testing across the entire SOC range.

Benefits of technology

It reduces the number of samples required for testing, lowers material costs, shortens the testing cycle, and improves testing consistency and reliability.

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Abstract

The application relates to a battery impedance test tool set and a test method. The battery impedance test tool set comprises a first tool and a second tool. The first tool comprises a first upper shell, a first lower shell, a positive electrode current collecting structure and a negative electrode current collecting structure. The first upper shell and the first lower shell are combined to form a closed first mounting cavity. The positive electrode current collecting structure and the negative electrode current collecting structure are arranged to extend outward from the first mounting cavity. The second tool comprises a second upper shell, a second lower shell, two positive electrode current conducting structures and two negative electrode current conducting structures. The second upper shell and the second lower shell are combined to form a closed second mounting cavity. Each positive electrode current conducting structure and each negative electrode current conducting structure is arranged to extend outward from the second mounting cavity. When the battery impedance is tested by the application, the required test sample is greatly reduced, the material cost can be effectively reduced, the test amount can be reduced, the test period can be shortened, the test consistency is good, and the test result is more reliable.
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