一种面向锂电池膨胀监测的薄层柔性应变传感器及其制备方法
By designing a thin-layer flexible strain sensor and utilizing a microcone array and a negative Poisson's ratio piezoelectric thin film structure, the problems of insufficient sensitivity and temperature interference in lithium battery expansion monitoring were solved, achieving high-precision and long-term stable expansion monitoring.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SOUTHEAST DIGITAL ECONOMY DEV INST
- Filing Date
- 2026-06-02
- Publication Date
- 2026-07-17
AI Technical Summary
Existing lithium battery expansion monitoring technologies lack sufficient sensitivity, making it difficult to capture early, weak expansion signals. Furthermore, temperature interference is severe, affecting measurement accuracy and long-term stability.
A thin-film flexible strain sensor is designed, comprising a flexible substrate, an ion shielding layer, a pressure-sensitive layer, and a temperature decoupling layer. Combined with a signal processing unit, it achieves accurate monitoring of lithium battery expansion through a microcone array structure and a negative Poisson's ratio piezoelectric thin film, blocking temperature interference and improving sensitivity and stability.
It achieves accurate capture of the slight expansion in the early stage of lithium battery, with a temperature drift rate of less than ±0.5%FS/°C. The sensor maintains high sensitivity and long-term stability under complex operating conditions and is suitable for monitoring the entire life cycle of lithium battery.
Smart Images
Figure CN122408595A_ABST