Cylindrical lithium ion battery structure suitable for series connection and parallel connection

Abstract

The invention discloses a cylindrical lithium ion battery structure suitable for series connection and parallel connection. The structure comprises a round cover plate, a bulged round step is arranged in the center of the cover plate, a metal wire pillar is arranged in the step, and the space between the metal wire pillar and the round step is sealed in an insulating manner through sintering of special glass; the lower end of the wire pillar adopts a flat structure distributed with tabs, and the upper end of the wire pillar is connected with a serial port or a parallel port of a battery through welding or riveting, or by a screw stud; and a fluid filler opening is formed on a pole. By adopting the structure to realize quick and reliable series connection and parallel connection among batteries, the internal resistance is effectively lowered, the large multiplying power charge-discharge of a power type cylindrical lithium ion battery can be realized, the series connection and parallel connection of a large amount of individual cells can be realized, the technical level of the cylindrical battery can be further developed, and the industrialization of the cylindrical battery combination is promoted.

Description

Technical field: [0001] The invention relates to the technical field of lithium ion batteries, in particular to a cylindrical lithium ion battery structure for series and parallel connection. Background technique: [0002] Lithium-ion battery is a high-energy storage battery system, which has outstanding advantages such as high working voltage, wide working temperature range, long service life and high specific energy. Since Sony launched commercial lithium-ion batteries in 1990, lithium-ion batteries have undergone rapid development, especially in the field of power batteries. For example, electric vehicles and hybrid electric vehicles have attached great importance to lithium-ion batteries. potential market. In addition, the depletion of primary energy and the development of new energy have brought new changes to the energy structure and transmission methods; the power grid and the traditional power industry are facing huge challenges. Distributed new energy generation m...

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is to solve the disadvantages of the existing cylindrical battery such as difficult assembly, poor reliability, large internal resistance and weak safety during the assembly process. The present invention proposes a series-parallel combination cylindrical power lithium-ion battery , the battery includes two parts, the battery case (7) and the cover plate (1), which are formed by laser welding. The cover plate (1) is round and has a circular hole on the edge. (Bottom) A layer of metal foil (6) is pasted on the surface, and there is a protruding circular step in the middle. The metal wire post (3) installed on the step and the circular step are connected by special glass sintering insulation and sealing. The lower end of the column (3) is a flat structure with tabs, and the upper end is connected to the serial or parallel port of the battery through welding, riveting, or studs; the tabs are welded to the wire post; the liquid injection port (8) is set on the pole superior

Images