A pole piece die-cutting and slitting integrated sheet-making knife mold and sheet-making method thereof

Abstract

The invention discloses a die-cutting and splitting integrated pole piece manufacturing cutting die. The cutting die comprises a die body and a die core used for cutting a pole piece. The die core is fixed to the die body and comprises a set of parallel horizontal cutting parts, two sets of parallel oblique cutting parts and two rectangular cutting ends. The width a of each rectangular cutting end is the distance between an upper side pole lug and a lower side pole lug. The distance b between the horizontal cutting parts is the width (c+2d) of middle blank foil, wherein d is the width of a cut-off upper slurry area or a cut-off lower slurry area. The invention further discloses a manufacturing method for the pole piece. The die-cutting and splitting integrated pole piece manufacturing cutting die and method have the advantages that the pole piece is formed at a time in a die-cutting and splitting integrated mode, a splitting procedure is omitted, the number of feeding and discharging of the pole piece is decreased, the production efficiency is high, equipment input is low, energy consumption is reduced, input of manpower and material resources is reduced, the production cost is effectively lowered, the occupied area is small, the space utilization rate is high, the well-cut edge of the pole piece is trim and free of steps, and the dimensional precision is high.

Description

technical field [0001] The invention relates to the field of lithium-ion battery pole piece production, in particular to a pole piece production method and a production knife die. Background technique [0002] At present, the production process of the pole piece is pulping-coating-rolling-pre-slitting-die-cutting-slitting. Among them, the die-cutting process of the pole piece has the following three methods: the method is as attached Figure 1-3 As shown, the pole piece includes the blank foil 2 on both sides, the upper slurry area 3, the lower slurry area 4, and the blank foil 5 in the middle. The small roll of pole piece is rolled up, and then the middle blank foil 5 is unilaterally die-cut on the die-cutting machine, and the shape of the tab is cut out before winding; the second method is as Figure 4-6 As shown, the pole piece includes the blank foil 2 on both sides, the upper sizing area 3, and the lower sizing area 4. First, the blank foil 2 on both sides is double-sid...

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: In view of the above problems, the purpose of the present invention is to provide a die-cutting die for pole piece production and its production method, with simple steps and less required equipment, so as to solve the problem of numerous steps in the existing die-cutting process and the equipment required. The problem of large footprint and poor accuracy of CPC correction

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