Real-time mechanical and thermal monitoring of lithium batteries with PVDF-TrFE thin films integrated within the battery

Xiaoli PENG, Jiang HAN, Qian ZHANG, Yong XIANG, Xiaoran HU*

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

8 Citations (Scopus)

Abstract

Lithium battery cells typically have a sealed structure. Throughout the life cycle of such batteries, electric/chemical/force/thermal multi-field coupling interactions occur during the service process. Therefore, in situ characterization of the internal mechanics and temperature parameters of batteries is vital for managing their safety. In this study, a lithium-ion battery pressure/temperature monitoring micro thin-film sensor based on a flexible printed circuit anode current collector is formed by using a piezoelectric/pyroelectric poly (vinylidene fluoride-trifluoroethylene) material. The micro thin-film sensor is integrated within the battery and can monitor the mechanical and thermal damage inside the battery in real-time without interfering with the battery operation. The micro thin-film sensor prepared following this method provides sufficient early warning of battery failure and can significantly improve battery safety performance.

Original languageEnglish
Article number113484
Number of pages9
JournalSensors and Actuators A: Physical
Volume338
Early online date2 Mar 2022
DOIs
Publication statusPublished - 1 May 2022
Externally publishedYes

Bibliographical note

This work was supported by Sichuan Province Science and Technology Support Program, China (Contract no. 2018JY0554, Contract no. 2069998).

Keywords

  • Battery pressure/temperature monitoring
  • Flexible printed circuit current collector
  • Poly (vinylidene fluoride-trifluoroethylene)
  • Real-time monitoring

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