On-line life calculation method for battery system

The invention provides an on-line life calculation method for a battery system. The on-line life calculation method for the battery system provided by the invention comprises the following three steps: inputting the total energy of charging and discharging of the battery system during the entire life process; calculating the total energy of the finished charging and discharging of the batter system at the moment; and utilizing the two energies to obtain an on-line life of the battery system. Compared with the existing calculation method, the on-line life calculation method for the battery system provided by the invention has the following two advantages: few input parameters are needed for calculating the on-line life and the parameters can be collected by a simple device, namely, the battery system can be carried out the on-line life calculation simply by calculating the total energy of charging and discharging of the battery system; and meanwhile, the calculation process is relatively simple and can be realized without the complicated software and hardware devices.