Lithium ion battery and preparation process thereof

The invention relates to the field of lithium ion batteries, and discloses a lithium ion battery and a preparation process thereof. The process comprises steps: the cell of the lithium ion is put in ashell; the lithium ion cell put in the shell is placed in a baking chamber for being baked; a circuit is connected with the positive electrode and the negative electrode of the lithium ion cell to form a loop, and after a predetermined time duration, the connected circuit is cut off; an electrolyte is poured to the shell to enable the electrolyte to immerse the lithium ion cell; and a liquid injection hole is sealed. By adopting the technical scheme, the battery self discharge possibility is reduced. 本发明涉及锂离子电池领域，公开了一种锂离子电池及其制备工艺。工艺包括，锂离子电芯入壳；将入壳后的所述锂离子电芯置入烘烤室烘烤；电路连接所述锂离子电芯的正极、负极形成环路，至预定时长后，断开连接电路；往壳体灌注电解液，使所述电解液浸泡所述锂离子电芯；注液孔密封。采用该技术方案有利于降低电池自放电的几率。