Effect of remaining cycle life on economy of retired electric vehicle lithium-ion battery second- use in backup power for communication base station

Typical working conditions and application scenes of backup batteries for communication base station in China are analyzed in this article. And the mathematical model is established for economic analysis of the application of second-use of electric vehicle batteries in backup power for Chinese communication base station. The cost savings ratio in different remaining cycle life of second-use electric vehicle batteries compared with using lead-acid batteries are calculated at a price of 1.1 CNY/Wh and 0.7 CNY/Wh respectively. Analysis results show economy is remarkably influenced by remaining cycle life in new energy scene and its effect is weaker than calendar life and purchase price in other scenes.