METHOD AND SYSTEM FOR MONITORING BATTERY CELL HEALTH
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United States of America Patent
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Issued Date -
Dec 29, 2016
app pub date -
Aug 21, 2015
filing date -
Jun 24, 2015
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Abstract
A strain sensor, a system for monitoring a state of a battery cell, and a battery including the strain sensor. The strain sensor includes a thin, flexible substrate, a plurality of piezoresistors mounted on the substrate, an input for receiving a voltage signal, an output for providing an output voltage signal from the plurality of piezoresistors. The plurality of piezoresistors are connected to form a circuit that is insensitive to a change in temperature and an in-plane deformation of the substrate. The system includes the strain sensor, a source of voltage, and an analysis module configured for receiving a voltage signal based on the output voltage signal provided at the output of the strain sensor and calculating a state of charge or a state of health of a battery cell based on the received voltage signal. The battery includes the strain sensor and a space for spacing adjacent battery cells.
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