DEVICE AND METHOD FOR DETECTING TRANSIENT ELECTRICAL SHORT CIRCUITS IN A BATTERY CELL OR PACK
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United States of America Patent
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May 4, 2017
app pub date -
Nov 4, 2015
filing date -
Nov 4, 2015
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Abstract
A battery system employs a device for indicating micro-shorts occurring within one or more battery cells. The device detects whether a given battery cell or group of cells exhibits a transient electrical short circuit, such as a micro-short circuit, which can indicate a defect within the battery cell. The device receives a signal indicating the voltage of the given battery cell or group of cells, and compares the signal against a delayed version of the signal to detect the transient electrical short circuit. When a transient electrical short circuit is detected, the device outputs a corresponding fault signal to a battery management system (BMS), configured to monitor the battery cell. The BMS may then take further remedial action to prevent damage to the battery system.
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