A method and a system are provided for online estimating internal resistance of battery. The system includes: a high-voltage battery pack for providing high-voltage DC power, a voltage detection unit for detecting the total voltage of the high-voltage battery pack, a current detection unit for detecting the total current of the high-voltage battery pack, a secondary battery for providing low-voltage DC power, a DC/DC conversion unit for conversing the high voltage DC power to a low voltage DC power and transferring the latter to the secondary battery, a drive unit for driving the vehicle, an on-board charging unit for charging high-voltage battery pack, and a control unit. The control unit controls the system to measure information of a constant current and a corresponded voltage difference of the battery pack at the moment the constant current happened before and after, and then to calculate internal resistance of the battery pack.


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    Title :

    METHOD AND SYSTEM FOR ONLINE ESTIMATING INTERNAL RESISTANCE OF BATTERY


    Contributors:

    Publication date :

    2016-06-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen




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