Method for detecting battery performance of hybrid power vehicle

The invention discloses a detector for hybrid vehicle battery performance and a detection method thereof; the detector comprises an engine, a motor, a battery electrically connected with a battery management unit; characterized by that: the battery management system is also connected with a signal collection unit; with the structure and detection method, collecting battery voltage, current change, battery temperature, battery allowance during and after starting process of the engine by the signal collection unit, so as to accomplish online monitoring for essential resistance of the battery, obtaining the essential resistance with a calculation formula of battery performance, and taking the value as a parameter for battery performance correction; predicting battery performance (SOF) through quantized battery performance (SOF) data, analog battery performance (SOF) curve and a curve of battery performance (SOF) and cycle relation; according to the predicted battery performance (SOF), correcting operation area of battery, so as to improve efficiency and useful life of the hybrid vehicle battery.