Method for selecting Li (M1-xFex) PO4/Li4Ti5O12 high-capacity batteries

The invention relates to a method for selecting Li (M1-xFex) PO4/Li4Ti5O12 high-capacity batteries. The method comprises the following steps of testing the Li (M1-xFex) PO4/Li4Ti5O12 high-capacity batteries under at least two electric states of a high electric state, a half electric state and a low electric state, and selecting and matching battery monomers according to a test result. Because theinternal resistance and the self-discharge of the lithium battery are also continuously changed in different electrified states, according to the method, by testing and screening at least two positions of three specific rapid voltage drop areas of the Li (M1-xFex) PO4/Li4Ti5O12 battery in a charging and discharging curve, high consistency of the internal resistance and the self-discharge trend ofthe assembled battery in each working state can be effectively ensured, and after long-time working, high consistency of the battery monomers can still be maintained, so that the service life of a module is prolonged. 本发明涉及一种L