Method for fast judging self-discharging ratio of lithium iron phosphate battery

The invention discloses a method for fast judging the self-discharging ratio of a lithium iron phosphate battery. The method is characterized in that the battery stands at any selected standing period, after the battery stands, the voltages, obtained after the battery stands at different standing periods, of the battery are measured, and the self-discharging ratio of the lithium iron phosphate battery is judged according to a corresponding relation model of the voltages and the standing periods. The relation between the voltages and the standing periods can serve as a basis for judging the self-discharging ratio of the battery, the battery can be screened based on the standard during actual production, judgment is accurate, the zero error can be basically guaranteed, the stock time period of the battery can be effectively shortened, and the goods supply rate can be increased. According to the method for fast judging the self-discharging ratio of the lithium iron phosphate battery, whether the self-discharging index of the lithium iron phosphate battery meets the requirement or not can be judged within a short time and can serve as a basis about whether the battery can be delivered out in an accelerated mode or not during intensive good supplying.