Automotive Research & Testing Center

Yi-Chau Chiou

Tsung-Hsien Hu

Kuo-Liang Weng

Jia-Sing Hsu

A device for detecting state-of-health (SOH) of batteries has a detection module, a computation control module and an output module. The computation control module is electrically connected to the detection module and the output module. The detection module detects voltage values of a battery at multiple test points. The computation control module converts the voltage values at the test points into a ratio and maps the ratio to a SOH value in a SOH curve of the battery indicative of a state of health of the battery and the SOH value is outputted through the output module. The present invention can easily detect the SOH of a battery within a short period of time to solve the existing problems of being time-consuming and complicated in determining the SOH of batteries and causing incorrect determination of battery capacity and additional maintenance cost.

Device and method for detecting state of health of batteries

A method of estimating remaining battery power in electric vehicles is provided. The method uses coulometric detection method to obtain remaining battery power and uses an open voltage method to modify the coulometric detection method when modified conditions are met as well as different battery characteristics and conditions when in use. The remaining battery power in electric vehicles can conduct a dispersion degree detection at every stage and when a detection value is larger than a preset value, a self-adjusting mechanism will be activated to modify the battery power. When the battery is charged for a longer period of time, a regression method is used to establish a modified equation to increase precision of estimating remaining battery power.

Growing community of inventors

Changhua Hsien, Taiwan

Yi-Chau Chiou