An internal short-circuit detection method for a battery cell of a battery pack is determined using a battery cell charge balancing resistor and switch. The switch is used for connecting or disconnecting the battery cell charge balancing resistor to the battery cell. Evolution of discharging of the battery with the battery cell-charge balancing resistor connected to the battery cell is monitored to measure an internal short-circuit resistance of the battery cell for estimating the state of the internal short-circuit.
Battery internal short-circuit detection method based on cell charge balancing
2017-09-26
Patent
Electronic Resource
English
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY |
Autonomous charge balancing circuit and method for battery pack
European Patent Office | 2016
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