Lithium ion batteries as today's most successful chemical energy storage battery one of its footprint in consumer electronics products, not only more open its soil into electric carsBut the performance so outstanding lithium ion battery is very sensitive to temperature, low temperature to cause a decline in lithium ion battery performance and even lead to the lithium ion battery can't use, the low temperature charging more will lead to the production of lithium dendrite, in order to improve the low temperature performance of lithium-ion batteries, the researchers put forward a variety of measures, such as MartaKasprzyk Warsaw university of technology, people put forward the technology of amorphous electrolyte, will the use of the electrolyte temperature to expand to - 60 ℃, Shanghai university professor Xia Yong yao, the ethyl acetate, electrolyte, will further reduce the special material of battery temperature to 75 ℃, of course, not all of the research will focus on the electrolyte, the university of Pennsylvania Guangsheng Zhang and others will design a built-in Ni heating piece of battery, the battery from to 40 ℃ to recover to normal temperature only need 112 s, greatly improve the convenience of the lithium-ion batteries used in low temperature.