Cover plate for new energy lithium battery and forming process of cover plate

Abstract

The invention discloses a cover plate for a new energy lithium battery and a forming process thereof, and relates to the technical field of forming processes, in particular to the cover plate for the new energy lithium battery. The cover plate comprises a battery box; a heat insulation plate is arranged in an inner cavity of the battery box, a cover plate is mounted on the cover plate, a positive electrode column is arranged on the left side of the upper surface of the cover plate, a negative electrode column is arranged on the right side of the upper surface of the cover plate, terminal fixing covers are installed on the outer surfaces of the positive electrode column and the negative electrode column, and threaded grooves are formed in the outer surfaces of the terminal fixing covers. According to the cover plate for the new energy lithium battery and the forming process of the cover plate, the outer surfaces of the positive electrode column and the negative electrode column are sleeved with the terminal fixing cover, after the terminal is connected with the positive electrode column and the negative electrode column, the pressing nuts are rotated, and the two pressing nuts are used for fixing the terminal; therefore, the stability between the terminal and the positive electrode column and the stability between the terminal and the negative electrode column can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of forming technology, in particular to a cover plate for a new energy lithium battery and a forming process thereof. Background technique [0002] "Lithium battery" is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. It can generally be divided into two categories: lithium metal battery and lithium ion battery. The column is generally fixed by welding, and the fixing stability is poor. After the lithium battery is assembled, there are usually the following problems: there is only one exhaust port and liquid injection port for ordinary lithium batteries, and the exhaust efficiency and liquid injection efficiency are very slow. When the internal pressure of the battery is too high , unable to exhaust and decompress, the existing lithium battery cover plate, when the internal pressure of the battery is higher than a certa...

AI Technical Summary

Problems solved by technology

[0002] "Lithium battery" is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. It can generally be divided into two categories: lithium metal battery and lithium ion battery. The column is generally fixed by welding, and the fixing stability is poor. After the lithium battery is assembled, there are usually the following problems: there is only one exhaust port and liquid injection port for ordinary lithium batteries, and the exhaust efficiency and liquid injection efficiency are very slow. When the internal pressure of the battery is too high , unable to exhaust and decompress, the existing lithium battery cover plate, when the internal pressure of the battery is higher than a certain value, although the air pressure can lift the exhaust piece upwards, so that the gas can be discharged through the exhaust port to reduce the internal pressure of the battery. Air pressure, however, the vent sheet is movable in the liquid injection guide sleeve, resulting in poor sealing between the vent sheet and the liquid injection guide sleeve; the function of the exhaust port is to discharge the internal air pressure of the battery. When it is lower, the exhaust port is only covered by the exhaust sheet. Due to the poor sealing of the connection between the exhaust sheet and the liquid injection guide sleeve, it is easy for dust to enter the inside of the battery. In the connection of the lithium battery, the terminals are connected to the positive and negative poles Among them, after long-term use, the terminals and the positive and negative poles will become loose, which will affect the performance of the lithium battery. Therefore, here we propose a new energy lithium battery cover plate and its molding process to solve the above problems

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