▎ 摘　　要

NOVELTY - High-temperature and high-power lithium battery comprises a positive electrode, a negative electrode, a separator, and an electrolyte, where the separator comprises an organic microporous substrate, a ceramic coating layer and a high temperature resistant coating layer, the ceramic coating layer is attached to one or both sides of the organic microporous substrate, and comprises ceramic particles and a binder, the thickness of the ceramic coating layer is 0.1-10 mu m, the organic microporous substrate is covered with pores, and the size of the pores is not greater than particle size of the ceramic particles, the high temperature resistant coating layer continuously covers the surface of the ceramic coating layer and the inner wall of the hole, and comprises a high temperature resistant polymer and a curing crosslinking agent, and the high temperature resistant polymer comprises phenolic resin, urea-formaldehyde resin, polyimide or epoxy resin. USE - The high-temperature high-power lithium battery is used in high power output under high-temperature conditions for underground resources such as petroleum and natural gas, and mine drilling. ADVANTAGE - The lithium battery can be cycled stably for a long time under high temperature conditions of 70-200 degrees C, can circulate stably for a long time under the condition of output power of 8-20 kw, and realizes safe operation. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the use of the high-temperature high-power lithium battery in high power output under high-temperature conditions, where the high temperature condition refers to a working temperature of 70-200 degrees C.