US 9,812,886 B2
Method of diagnosing battery and adaptively adjusting charging modes of the battery
Wen-Chen Lih, Taoyuan (TW); Chiu-Hua Tseng, Taoyuan (TW); Shiow-Yueh Ma, Taoyuan (TW); and Yu-Min Liao, Taoyuan (TW)
Assigned to NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY, (TW)
Filed by NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY, Taoyuan (TW)
Filed on Dec. 18, 2015, as Appl. No. 14/973,915.
Claims priority of application No. 103145982 A (TW), filed on Dec. 29, 2014.
Prior Publication US 2016/0190825 A1, Jun. 30, 2016
Int. Cl. H02J 7/04 (2006.01); H02J 7/16 (2006.01); H02J 7/00 (2006.01)
CPC H02J 7/007 (2013.01) [H02J 7/0052 (2013.01); H02J 7/04 (2013.01); H02J 7/045 (2013.01); H02J 7/047 (2013.01); Y02B 40/90 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of diagnosing a battery and adaptively adjusting charging modes of the battery, the method comprising the steps of:
initially charging the battery using a constant current mode, wherein the battery is charged by a fix current in the constant current mode;
monitoring a deterioration index by a battery management system (BMS), the deterioration index including a highest temperature (Tempmax), an instantaneous temperature difference (ΔTemp), an instantaneous voltage difference (ΔV), an instantaneous internal resistance (IRmax), and a state of charge (SoC) of the battery, wherein Tempmax is a highest temperature among any of battery cells in the battery, Tempmin is a lowest temperature among any of the battery cells in the battery, ΔTemp is a difference of Tempmax and Temp min, Vmax is a highest voltage among any of the battery cells in the battery, Vmin is a lowest voltage among any of the battery cells in the battery, ΔV is a difference of Vmax and Vmin, and IRmax is a highest instantaneous internal resistance among any of the battery cells in the battery; and
when Tempmax exceeds a predetermined temperature threshold:
pausing charging the battery;
charging the battery by a constant power charging mode when Tempmax becomes smaller than 90% of the predetermined temperature threshold, wherein the battery is charged by a fix electric power in the constant power mode; and
charging the battery by the constant current charging mode when Tempmax becomes smaller than 50% of the predetermined temperature threshold.