A method and device for determining manufacturing parameters of a battery negative electrode sheet

By calculating the predicted lithium plating window of a lithium-ion battery and using the difference and coefficient between the actual lithium plating window of a reference battery and the user input, the areal density and compaction density of the target battery can be quickly determined. This solves the problems of high cost and low efficiency in existing technologies, and achieves cost savings and improved efficiency.

CN116381527BActive Publication Date: 2026-06-26JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
Filing Date
2023-04-10
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

In existing technologies, determining the negative electrode sheet surface density and compaction density corresponding to the preset lithium plating window of a lithium-ion battery requires experimental methods, resulting in high costs and low efficiency.

Method used

The predicted lithium plating window of the target battery is calculated by referring to the actual lithium plating window of the battery, the difference between the areal density and compaction density input by the user, and the coefficient. If the difference is within the preset range, the areal density and compaction density of the target battery are determined.

Benefits of technology

It saves costs and improves efficiency, avoids a large number of experiments, and enables the rapid determination of manufacturing parameters for the negative electrode of lithium-ion batteries.

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Abstract

The application provides a method and device for determining manufacturing parameters of a battery negative electrode sheet. The method comprises: obtaining an actual lithium precipitation window, a reference compaction density and a reference surface density of a reference battery, and a target lithium precipitation window of a target battery; obtaining a target surface density difference and a target compaction density difference between the reference battery and the target battery input by a user, a target surface density coefficient selected by the user in a surface density coefficient interval, and a target compaction density coefficient selected by the user in a compaction density coefficient interval; determining a predicted lithium precipitation window of the target battery according to the actual lithium precipitation window, the target surface density difference, the target compaction density difference, the target surface density coefficient and the target compaction density coefficient; and if a difference between the predicted lithium precipitation window and the target lithium precipitation window belongs to a preset lithium precipitation window difference range, then obtaining a target surface density of the target battery by subtracting the target surface density difference from the reference surface density, and obtaining a target compaction density of the target battery by subtracting the target compaction density difference from the reference compaction density.
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