Study on Low Temperature Performance of Li Ion Battery

Abstract

At low temperatures, especially when the temperature drops to -20 degrees, or even lower, the energy and power of lithium ion batteries are obviously decreased by [1] [2] [3] [4] [5]. In order to further grasp the lithium ion power battery charging characteristics at low temperatures and low temperature discharge performance test bench experiment simulates the low temperature environment, so as to ascertain the low charge discharge characteristics, provide the basis and guidance for the application of low temperature battery. In this paper, the cathode is three yuan for the anode material, graphite type 18,650 power lithium ion battery business as a research object of low temperature test, through the research on the low temperature performance of single battery, not only can provide the basis for the design of thermal management system of electric vehicle, but also provide theoretical and experimental basis for the AC excitation of heating.