Lithium ion battery forming process

Lithium ion battery forming is the first charge process of the lithium ion battery.The purpose of this work is to make lithium ion battery have the electrochemistry active.The forming process is forming a solid electrolyte interface film(SEI film),the SEI film have the character of the solid electrolyte interface,is a electronic insulator but this film is a excellent conductor for Li+,the Li+can pass the SEI film freely.The important ingredient of the SEI film is Li2CO3、LiF、LiOH、ROCO2Li、ROLi etc.The quality of the SEI film have a big relativity with the forming process,if the forming process is not good,it could not forming a high quality SEI film,and then the will have bad influence of the cycle life and the electrochmistry performance.

The forming process can activate the cathode and the anode material have the electrochmical reaction and the forming film ingredient of the electrolyte forming the SEI film at he surface of the anode,effectively prevent the reaction of the solvent and the anode active materials,admit the de-intercalation of the Li+.The state of the Li+directly influence of the battery anode interface,capacity performance,self discharge,cycle performance and safety performance.

TOB New Energy can provide full set of battery formation charge and discharge machine. They are suitable for coin cell,pouch cell and cylindrical battery formation and grading in battery production line manufacturing.