Method for rapidly evaluating pulse power charge and discharge capacity of lithium ion power battery

The invention relates to a method for rapidly evaluating the pulse power charge and discharge capacity of a lithium ion power battery. The method comprises the following steps of: under a test temperature, calibrating the battery capacity and discharging the battery to a specified charge state; according to the basic design of the battery, respectively performing power charging/discharging at six different powers within the bearable power range of the battery, and recording the change of the voltage of the battery along with the time; based on the test data, taking cut-off voltages of battery charging/discharging under different powers, and taking the power as a horizontal ordinate and taking the cut-off voltage as a vertical coordinate to make V-P graphs of different pulse time; and fitting the obtained curves, and establishing a relation between the charging/discharging power and the cut-off voltage to obtain a unitary quadratic model V=aP2+bP+c. The method for rapidly evaluating the pulse power charge and