An Electrolyte Soaking And Thermal Shock Test Of Microtemperature And Voltage Sensors

Abstract

The safety issue of lithium battery has gained importance in recent years. The micro-electro-mechanical systems (MEMS) technology is used to fabricate microsensors, which are embedded in lithium battery for in situ monitoring of temperature and voltage. This information in lithium battery is picked up to improve safety. Lithium batteries have a harsh internal environment, which makes measurement difficult. For example, electrolyte and heat can diminish accuracy in microsensors or even cause them to crash. This work used electrolyte soaking test and thermal shock test to simulate the inner environment of a lithium battery. The comparison of calibration curve before and after tests shows repeatability and a highly linear relationship, which proves the strength that the microsensor can sustain in harsh environment.

Keywords:

• Lithium battery
• Microsensors
• Microvoltage sensor
• Electrolyte soaking test
• Thermal shock test

Acknowledgments

This work was accomplished with much needed support and the authors would like to thank the National Science Council of the Republic of China through the grant NSC 99-2632-E-155-001-MY3. The authors also like to thank Professors Ming-Yu Chung and Kuo-Chang Han of the Yuan Ze University for their valuable advice and assistance in experiment. In addition, we would like to thank the YZU NENS Common Lab and TKU MEMS Lab for providing access to their research facilities.