Gel polymer electrolyte, polymer lithium ion battery and making method of polymer lithium ion battery

The invention provides a gel polymer electrolyte. A polymer membrane absorbs an electrolyte and swells to form the gel polymer electrolyte, and the polymer membrane is formed through thermocuring self-crosslinking of a liquid polymer mixture; and the liquid polymer mixture contains a pure acrylic emulsion, water and ammonia water, and the glass transition temperature of the pure acrylic emulsion is -30 - 50 DEG C. The invention also provides a polymer lithium ion battery adopting the gel polymer electrolyte, and a making method of the polymer lithium ion battery. The gel polymer electrolyte has the advantages of substantial improvement of the security, stable electrochemical performances and high voltage resistance, can realize the inhibition of the generation of lithium dendrites, no liquid leakage, substantial improvement of the security and good cycle stability when the gel polymer electrolyte is used in the polymer lithium ion battery, and is more suitable for lithium ion power batteries.