Lithium ion battery over-charge safety protection device

• Main Authors: LIU XIAOLEI, WANG PENG, HU JUNZHONG, DENG PINGHUA, LU YANHUA
• Format: Patent
• Language: Chinese; English
• Published: 05.06.2013
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The utility model belongs to the field of lithium ion batteries and in particular relates to a lithium ion battery over-charge safety protection device. The device comprises a top cover piece, a first pole, a second pole, a pressure release valve, a liquid injection hole and a safety turning valve, wherein the first pole is electrically connected with the top cover piece; the second pole is assembled with the top cover piece in an insulating mode; the pressure release valve, the liquid injection hole and the safety turning valve are arranged on the top cover piece; the safety turning valve comprises a short-circuit conductive piece and a turning piece; and a metal layer for reducing the contact resistance is coated on the surface of the short-circuit conductive piece and the turning piece. The metal layer for reducing the contact resistance is arranged, the short-circuit contact resistance of the safety device is reduced, aluminum melt through of the short-circuit conductive piece and the turning piece is avo