A new type of cylindrical lithium battery for energy storage without welding

Abstract

The invention discloses a new welding-free grouping device for cylindrical lithium batteries for energy storage, which includes: an insulating case, a six-claw conductive sheet and a soft pad, and the top and bottom of the insulating case are respectively concentrically provided with upper blind holes and The lower blind hole is provided with a rounding platform between the upper blind hole and the lower blind hole for isolation. The six-claw conductive sheet includes a downwardly convex annular sheet and six claws distributed around the annular sheet in an annular array. The annular The sheet is attached under the rounding table, the soft gasket is arranged between the rounding table and the annular sheet, and the inner wall of the insulating housing is provided with six grooves, and the six claws extend to the upper surface through the six grooves respectively. inside the blind hole. Through the above method, the new type of cylindrical lithium battery for energy storage according to the present invention can completely eliminate the quality problems such as welding through and excessive heat-affected zone during the welding and grouping of power battery cells, and greatly improve the The utilization rate of the power battery unit is 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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