Novel welding-free grouping device of cylindrical lithium battery for energy storage

Abstract

The invention discloses a novel welding-free grouping device of a cylindrical lithium battery for energy storage. The novel welding-free grouping device comprises an insulation shell, a six-claw conductive sheet and a soft gasket, wherein an upper blind hole and a lower blind hole are respectively and concentrically formed in the top and the bottom of the insulation shell, an inverted round table is arranged between the upper blind hole and the lower blind hole for insulation, the six-claw conductive sheet comprises an annular thin sheet and six claws, the annular thin sheet protrudes downwards, the six claws are arranged around the annular thin sheet in an annular array way, the annular thin sheet is attached onto a lower part of the inverted round table, the soft gasket is arranged between the inverted round table and the annular thin sheet, six grooves are formed in an inner wall of the insulation shell, and the six claws extend into the upper blind hole respectively through the six grooves. By the novel welding-free grouping device of the cylindrical lithium battery for energy storage, the quality problems of weld penetration, excessively large thermal influence region and the like during the welding and grouping process of a single power battery are completely eliminated, and the utilization ratio of the single power battery is greatly improved.

Description

technical field [0001] The invention relates to the field of secondary grouping of batteries, in particular to a novel welding-free grouping device for cylindrical lithium batteries for energy storage. Background technique [0002] By the end of 2015, the number of new energy vehicles in my country exceeded 500,000. According to the "Thirteenth Five-Year Plan", the number of new energy vehicles in my country will reach 5 million by 2020. This means that in the next 3-5 years, about 120,000-170,000 tons of decommissioned power batteries need to be disposed of each year. Moreover, the decommissioned power battery still has 80% of the battery capacity, and direct recycling and recycling will lead to low resource utilization and serious waste of energy. The cascade utilization of power batteries can not only improve the resource and energy utilization of power batteries, but also extend the value chain of power batteries, reduce the cost of using power batteries to replace tra...

AI Technical Summary

Problems solved by technology

[0004] In order to solve these problems, Tesla adopted a fuse-type two-point welding method in the secondary grouping of power battery cells. Although the problem of welding at the same point was avoided, the residual stress was increased to varying degrees. The group stress is more obvious, which brings certain risks to the quality of cascade utilization products

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