Lamination device and method

Abstract

The invention discloses a lamination device which comprises an unwinding and winding mechanism, a tape travelling mechanism, a sheet conveying mechanism, a performing mechanism, a lamination mechanism and a trimming mechanism, wherein the unwinding and winding mechanism is controlled to unwind and wind diaphragms as well as positive and negative pole piece tapes in accordance with a preset superposition sequence; the tapes are conveyed to the lamination mechanism by the tape travelling mechanism; the sheet conveying mechanism is controlled to stack the positive and negative pole pieces alternatively on the tapes on the lamination mechanism; before the preset thickness is obtained, after each lamination is stacked, the performing mechanism is controlled to firmly press the part of the tapebelow the pole piece; the tape travelling mechanism is controlled to move back so as to fold the free part of the tape and cover the pole piece; and the trimming mechanism is controlled to cut the tape when the lamination reaches the preset thickness. The invention also discloses a lamination method. As the wound tapes and the formed pole pieces are laminated simultaneously, the lamination efficiency in cell manufacturing is greatly improved.

Description

technical field [0001] The invention relates to a battery production method and equipment, in particular to a lamination equipment and lamination method. Background technique [0002] Energy storage lithium batteries are developing towards high power, and the winding method can no longer meet the production of batteries with large charging and discharging currents. It has been proposed to separate the positive and negative pole pieces with a diaphragm, and the diaphragm and the pole piece are repeatedly overlapped to form a laminate. Among them, the formed pole pieces are cut out by the pole piece forming equipment, and the positive and negative pole pieces are taken out of the material box and then Stack up. Since each battery needs to be stacked with dozens or even hundreds of pairs of pole pieces, the workload is very large. [0003] Chinese patent application 200820213414.2 discloses a fully automatic stacking device for power batteries. Its structural feature is that ...

AI Technical Summary

Problems solved by technology

This method and mechanism are suitable for the lamination of formed pole pieces with small specifications, and cannot complete the lamination of rolled pole pieces, which has certain limitations.

In addition, when the lamination of pole pieces with larger specifications is completed with this structure, because the stroke of its reciprocating movement is longer, the lamination efficiency is affected, and the space occupied by the equipment is large, which increases the cost.

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