Safe top cover of power cell

• Main Authors: LIU XIAOLEI, WANG PENG, HU JUNZHONG, DENG PINGHUA, LU YANHUA
• Format: Patent
• Language: Chinese; English
• Published: 03.07.2013
• 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 technical field of power cells, and particularly relates to a safe top cover of a power cell. The safe top cover comprises a top cover sheet, and an anode pillar, a cathode pillar, a decompression valve and a liquid filling hole that are arranged on and formed in the top cover sheet, wherein the anode pillar is electrically connected with the top cover sheet, and the cathode pillar is in insulation assembly with the top cover sheet, and is connected with an NTC (negative temperature coefficient) thermistor. Compared with the prior art, the cathode pillar is connected with the NTC thermistor; when a temperature is below 80 DEG C, resistance of the NTC thermistor is about one megohm; once the temperature reaches 80 DEG C, the resistance of the NTC thermistor drops suddenly and is only 100 milliohm, so that the anode and cathode pillars are conducted; at this point, self-discharge current is greater than charge current, so that an overcharge process is interrupted; a cell system