Real-time evaluation method for remaining capacity of power batteries and device thereof

The invention relates to the technical field of automobile power batteries. Due to the fact that a general battery management system adopts an embedded system, the system resources are scarce and remaining capacity of the power batteries cannot be evaluated accurately. The invention discloses a real-time evaluation method for the remaining capacity of the power batteries and a device of the real-time evaluation method. A control unit of a data acquisition terminal is communicated with the battery management system by controlling an inside controller area network (CAN) interface to acquire battery data of a battery pack, and transmits the acquired data to a general packet radio service (GPRS) module which transmits the acquired data to a GPRS wireless network. An upper computer receives the data through the GPRS wireless network, and processes the data of the power batteries through an extend Kalman filtering algorithm to accurately calculate the system on a chip (SOC) value. Finally, the GPRS wireless network transmits the calculated SOC value to the data acquisition terminal to perform display. Therefore, the real-time accurate evaluation on the remaining capacity of the automobile power batteries can be achieved.