Electromobile combination power battery

The invention relates to an electromobile combination power battery. The electromobile combination power battery comprises a main discharge battery set and an auxiliary discharge battery set, wherein the nominal voltage of the main discharge battery set is matched with the nominal voltage of the auxiliary discharge battery set; the auxiliary discharge battery set adopts lithium iron phosphate lithium ion batteries; the auxiliary discharge battery set is connected with the main discharge battery set in parallel through a high-power diode. In the electromobile combination power battery of the invention, lead-acid batteries, cadmium nickel or nickel-metal hydride batteries, and the lithium iron phosphate lithium ion batteries can be used in a mixing way, the lead-acid batteries, and cadmium nickel or nickel-metal hydride batteries are used as the main discharge battery set, and the lithium iron phosphate lithium ion battery set is used as the auxiliary discharge battery set to foster the strengths and circumvent weakness. The invention can meet the technical requirements of high multiplying power discharge performance, high output voltage, high capacity charge, and the like of the electromobile power battery. The electronic elements are connected in parallel through the high-power diode, and no other operation is required for conversion. The invention has the advantages of high performance, low cost, convenient operation, safety and reliability.