Vehicle control based on lithium plating detection in electrified vehicle battery

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Vehicle control based on lithium plating detection in electrified vehicle battery

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HE CHUAN / COWELL JEFFREY / LI FENG / WANG XU / MAO RUIQI / SWISHER BRANDON / CHEN HAIYAN

A vehicle having a traction battery with at least one cell includes a controller coupled to the traction battery and programmed to control charging and discharging of the traction battery in response to detecting lithium plating in the at least one cell indicated by a ratio of differential voltage of the at least one cell as a function of time to cell charging rate of the at least one cell. In various embodiments, the ratio is compared to a threshold associated with current battery state of charge to indicate lithium plating when the ratio is below the threshold. Lithium plating can also be detected based on a measured cell open circuit voltage (OCV) relative to a previously stored OCV value. In various embodiments, the measured OCV value is calculated based on a measured cell voltage and current, and a previously stored cell internal resistance.

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Title :

Vehicle control based on lithium plating detection in electrified vehicle battery

Contributors:

HE CHUAN (author) / COWELL JEFFREY (author) / LI FENG (author) / WANG XU (author) / MAO RUIQI (author) / SWISHER BRANDON (author) / CHEN HAIYAN (author)

Publication date :

2018-11-27

Type of media :

Patent

Type of material :

Electronic Resource

Language :

English

Classification :

IPC:

B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / 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 / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung