A battery system life prediction method of line

The present invention is in the field of new energy vehicles and new energy storage means is a battery system life prediction method. The specific method is: under certain initial conditions, as a standard vehicle battery system to a desired minimum discharge power discharged to a cutoff voltage of the battery system to give a discharge sustaining time T0; under the same conditions, the battery charging method of standard charging the battery system to obtain the current to maintain the charging time T0 '; thus obtaining a plurality of methods during the constant power throughout the life of charge and discharge duration Tx, Tx', and complete charge and discharge two fitting curves. An unknown state of life of the battery system was also tested, and obtain the constant power charging, the sustain time T, T ', the T and T' can be substituted into the curve fitting calculation for this battery system current charge and discharge life; Finally, by multiplying the charge life weight plus charge life life multiplied method discharge life weight predicted current to the discharge life of the battery system.