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Patent Searching and Data


Title:
PROTECTOR FOR PREVENTING LITHIUM BATTERY FROM BEING CHARGED BY OVERVOLTAGE
Document Type and Number:
WIPO Patent Application WO/2013/097591
Kind Code:
A1
Abstract:
A protector for preventing a lithium battery from being charged by an overvoltage adopts two shaft-like temperature fuses in series, the temperature fuses being connected in series in a positive electrode loop of a circuit; one end of a wire-wound resister is connected to a joint of the two temperature fuses, and the other end is in series with a transient voltage suppressor (TVS) tube; the other end of the TVS tube is connected to a negative electrode of the circuit. A hollow ceramic tube having two through holes is disposed on the protector; the shaft-like temperature fuses are respectively mounted in the two through holes, and the two temperature fuses are connected at an end of the ceramic tube, forming a series circuit that connects the positive electrode of the lithium battery and a positive electrode of a charging power supply. The wire-wound resister R is disposed on an outer surface of the ceramic tube; one end of the ceramic tube is connected to the joint of the two temperature fuses, and the other end is connected to a TVS tube; the other end of the TVS tube is connected to the negative electrode of the circuit. According to the present invention, when exceptional overvoltage charging occurs, the TVS tube is turned on, and the wire-wound resistor is heated rapidly, so that the temperature fuses are disconnected rapidly, thereby cutting off the power. The protector can accept an instruction of cutting off the circuit sent by a BMS management system of the lithium battery, so that the wire-wound resistor is directly turned on and heated, and the temperature fuses are disconnected rapidly, thereby cutting off the power.

Inventors:
XU YOUSHENG (CN)
ZHANG HANPING (CN)
XIE HESHUI (CN)
Application Number:
CN2012/086246
Publication Date:
July 04, 2013
Filing Date:
December 10, 2012
Export Citation:
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Assignee:
XIAMEN SET ELECTRONICS CO LTD (361101, CN)
International Classes:
H02H7/18; H02H5/04; H02H9/04
Foreign References:
CN101814724A2010-08-25
CN201303249Y2009-09-02
CN202586297U2012-12-05
CN201134461Y2008-10-15
Attorney, Agent or Firm:
SHOUCHUANG JUNHE PATENT AGENT CO., LTD. XIAMEN (5F Labour Force Market Building, No.191 Changqing Road Siming Distric, Xiamen Fujian 2, 361012, CN)
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Claims: