电池内局部电解液电导率和浓度的检测方法及其应用
By setting microelectrodes inside lithium-ion batteries and using impedance spectroscopy detection, the problem of inefficient detection of local electrolyte concentration in existing technologies has been solved, enabling non-destructive and low-cost monitoring and aging analysis of electrolyte distribution.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- XIAMEN UNIV
- Filing Date
- 2025-02-24
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies are insufficient for efficiently and non-destructively detecting the concentration of local electrolytes inside lithium-ion batteries. Furthermore, traditional methods are costly and require complex equipment, making them unsuitable for the daily monitoring needs of large-scale batteries.
An impedance spectroscopy detection method combining microelectrodes and transmission line models is adopted. By placing microelectrodes inside the battery, applying voltage perturbation and measuring impedance or resistance, the conductivity and concentration of the local electrolyte are obtained by fitting a standard curve.
It enables non-destructive, simple, and efficient detection of local electrolyte concentration and distribution uniformity inside batteries, and can monitor electrolyte change trends during battery aging, thus reducing detection costs.
Smart Images
Figure CN120064387B_ABST