A method of confirming the passivation of positive grids of lead-acid batteries

CN122259293APending Publication Date: 2026-06-23TIANNENG BATTERY GRP (JIANGXI) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANNENG BATTERY GRP (JIANGXI) CO LTD
Filing Date
2026-03-09
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing methods for detecting the passivation layer of lead-acid battery panels require expensive instruments and specialized technology, are complex to operate, have high testing costs, and produce results that are not intuitive enough, making it difficult to meet the needs of large-scale production and rapid testing.

Method used

By observing the reaction of the grid surface with acetic acid aqueous solution and the appearance of metallic luster, the existence of the passivation layer was confirmed using simple chemical reagents and operating procedures, including initial cleaning, removal of lead dioxide, secondary cleaning, drying, and acetic acid reaction testing.

Benefits of technology

It enables rapid, accurate, and low-cost passivation layer detection. It is simple to operate, requires no special equipment, and the results are intuitive and easy to understand. It is suitable for production sites, with short detection time and reliable results.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses a method for confirming the passivation layer of the positive grid of a lead-acid battery panel, comprising the following steps: S1, initial cleaning; S2, removal of lead dioxide; S3, secondary cleaning; S4, drying treatment; and S5, acetic acid reaction test. By observing the reaction of the grid surface with the acetic acid aqueous solution (whether bubbles are generated) and the appearance of metallic luster, the presence of a passivation layer can be directly determined. The results are intuitive and easy to understand, requiring no complex data analysis. Pre-treatment steps such as initial cleaning, lead dioxide removal, and secondary cleaning effectively eliminate interference from other substances on the grid surface, ensuring the accuracy of the acetic acid reaction test. Furthermore, by optimizing reaction conditions (such as acetic acid concentration, reaction temperature, and reaction time), the reliability of the test results is further improved.
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