The invention relates to a method for sorting the consistency of
lithium titanate single batteries. According to the method, both
static performance parameters such as capacity,
voltage and
internal resistance and dynamic parameters such as
polarization impedance, large-current charging-discharging capacity and self-discharging capacity are considered. The method comprises the following steps that1, primary sorting is carried out according to parameters such as
discharge capacity, open-circuit
voltage and alternating-current
internal resistance; 2, secondary sorting is carried out after the single batteries undergo high-temperature standing for a period of time; and 3, third-time sorting is carried out on the single batteries subjected to secondary sorting by detecting high-rate
pulse discharge conditions, and finally the
lithium titanate single batteries with high consistency are obtained. According to the method, the problem that the consistency of single batteries in an existing
lithium titanate battery system is difficult to sort is solved; the performance of the battery packs which are formed by the
lithium titanate single batteries sorted through the method can be better than that of battery packs which are grouped through a common grouping method; and meanwhile, compared with an existing conventional sorting method, the sorting method is simple to operate, free of redundant equipment investment, short in testing time, and facilitates industrial popularization and application.