Method for manufacturing lithium-ion batteries

By alternately stacking anode and cathode entities and leaving free space between each layer, combined with multilayer packaging and laser cutting, the creep short-circuit problem in lithium-ion battery manufacturing has been solved, enabling the production of batteries with high energy density, high power density, and low cost.

CN115868054BActive Publication Date: 2026-06-16I TEN
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
I TEN
Filing Date
2021-05-19
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

Existing lithium-ion batteries have the risk of creep short circuits during manufacturing, which leads to performance degradation and packaging discontinuity, as well as low production efficiency and high cost.

⚗Method used

By employing an alternating stacking of anode and cathode entities, leaving free space between each layer, and using a multi-layer packaging system to ensure battery packaging integrity and electrical connection, combined with laser cutting and impregnation of electrolyte materials, a high energy density and high power density lithium-ion battery is formed.

🎯Benefits of technology

It improves the production efficiency and packaging quality of lithium-ion batteries, reduces the risk of creep short circuits, enables the manufacturing of batteries with high energy density and high power density, extends battery life, and reduces production costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

According to the method of the application: manufacturing a stack (I) comprising, in plan view, x rows and y columns so as to form (x*y) cells, this stack being formed by a succession of alternating layers (SA, SC) respectively of anode layers (SA) and cathode layers (SC), each layer (SA, SC) comprising a plurality of respective anode primary blanks (111') and cathode primary blanks (141'), a plurality of respective anode secondary blanks (112') and cathode secondary blanks (142'), these blanks forming primary and secondary bodies of the cells and so-called "empty" zones (80", 70") between these primary and secondary bodies; in plan view, making a pair of main cuts (DYn, DY'n) between two adjacent empty zones (80", 70") so as to expose an anode connection zone (1002) and a cathode connection zone (1006) of each cell and to separate a given cell formed by a given row from at least one other adjacent cell formed by at least one adjacent row.
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