Double-stud type lithium ion power battery cover plate structure

Abstract

The invention discloses a double-stud type lithium ion power battery cover plate structure, and relates to a lithium ion battery. The double-stud type lithium ion power battery cover plate structure comprises a cover plate, plastic sealing parts, a pole, a ceramic insulation sheet and an anti-explosion valve; the double-stud type lithium ion power battery cover plate structure is characterized in that the studs after adapter coupling are arranged on the outer side of the cover plate, a hole is formed in a position for penetrating of a pole pressure plate and the pole so as to allow a pole assembly to pass, the plastic sealing parts are arranged between the cover plate and the pole and between the pole pressure plate and the cover plate, and the pole pressure plate is arranged on the plastic sealing part on the outer side of the cover board. According to the double-stud type lithium ion power battery cover plate structure, a stud and pole non-collinear structure is designed on the cover board for preventing the pole from rotating; injection molding and encapsulation are carried out on the periphery of the pole pressure plate to achieve a limiting effect; the area of the pole pressure plate is increased to ensure the connecting reliability and meet the requirement of the electrical conductivity.

Description

technical field [0001] The invention relates to a lithium ion battery, in particular to a cover plate structure of a double stud structure lithium ion power battery. Background technique [0002] The cover plate of a commonly used lithium-ion power battery basically includes a cover plate, a plastic seal, a pole, an insulating sheet, and an explosion-proof device. If the pole on the cover plate adopts the stud method that is convenient for external connection, the pole will also play the role of fastening the plastic seal while conducting electricity. During the process of external connection of the battery, the pole will twist and drive The twisting of the busbar may easily cause a short circuit or open circuit of the battery, and a gap will appear in the seal, which will cause leakage of the electrolyte, which will bring very serious consequences. In addition, since the batteries are generally not used alone, they need to be grouped to maximize the effectiveness of the ba...

AI Technical Summary

Problems solved by technology

[0003] In view of this, the object of the present invention is to address the problems in the above-mentioned background technology and provide a double-stud structure lithium-ion power battery cover structure to solve the problem of preventing the pole from rotating while the pole is connected to the outside to prevent the cover from being used. Among them, the failure problem, safety problem and the reliability, safety and maintainability of the external connection in the use of batteries in groups are not easy to take into account.

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