Method for estimating salt concentration of electrolyte of secondary battery and device for estimating salt concentration

By using a computer system combined with a capacity and discharge time mapping table to predict the salt concentration of the secondary battery electrolyte, the problem of inaccurate salt concentration prediction in existing technologies is solved, thus improving battery performance and prediction accuracy.

CN122246305APending Publication Date: 2026-06-19PRIME PLANET ENERGY & SOLUTIONS INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PRIME PLANET ENERGY & SOLUTIONS INC
Filing Date
2025-12-16
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing technologies cannot effectively predict the electrolyte salt concentration of secondary batteries, which affects their performance such as resistance to degradation during high-current charging and discharging.

Method used

The system uses a computer to obtain capacity, discharge time, and salt concentration. By using a pre-recorded mapping table of the relationship between secondary battery capacity, discharge time, and electrolyte salt concentration, the electrolyte salt concentration of the secondary battery can be estimated.

Benefits of technology

It can accurately predict the electrolyte salt concentration of secondary batteries, prevent battery performance degradation due to decreased salt concentration, and improve the accuracy of high-current charging and discharging capabilities and driving distance prediction.

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Abstract

This disclosure provides a method and apparatus for estimating the salt concentration of an electrolyte in a secondary battery. It provides a technique for estimating the salt concentration of an electrolyte in a secondary battery. The method for estimating the salt concentration of an electrolyte in a secondary battery disclosed herein includes: a capacity acquisition step (S1), acquiring the capacity of the secondary battery to be estimated; a discharge time acquisition step (S2), acquiring the discharge time when the secondary battery is discharged under predetermined conditions; and a salt concentration estimation step (S3), estimating the salt concentration of the electrolyte in the secondary battery based on the acquired capacity of the secondary battery, the acquired discharge time, and a table recording the relationship between the capacity, discharge time, and salt concentration of the secondary battery and the electrolyte in relation to the secondary battery to be estimated.
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