Pole piece punching mechanism and pole piece manufacturing device

Abstract

The invention discloses a pole piece punching mechanism and a pole piece manufacturing device. The pole piece punching mechanism comprises a punching driving mechanism, an upper fixed plate, a lower fixed plate, a supporting platform, an external guide post, an upper template, a lower template, convex molds, concave molds, pressure plates and elastic parts, wherein the elastic part is arranged between the upper fixed plate and the pressure plate so as to apply downward elastic acting force to the pressure plate; the convex molds comprise a left convex mold and a right convex mold; the concave molds comprise a left concave mold and a right concave mold; the pressure plates comprise a left pressure plate, a right pressure plate and a middle pressure plate; the elastic parts comprise a left elastic part, a right elastic part and a middle elastic part. When at a mold opening state, the lower surfaces of the left and the right pressure plate are lower than those of the left and the right convex mold, and the height difference of the lower surfaces of the left and the right pressure plate and the lower surfaces of the left and the right convex mold is between 0.05mm and 0.1mm; the lower surface of the middle pressure plate is lower than the lower surfaces of the left and the right pressure plate, and the height difference of the lower surface of the middle pressure plate and the lower surfaces of the left and the right pressure plate is smaller than 1mm. The pole piece punching mechanism has the advantages of high punching efficiency, high precision and little burring.

Description

technical field [0001] The invention relates to battery pole piece manufacturing equipment, in particular to a pole piece punching mechanism and a pole piece manufacturing device. Background technique [0002] Pole punching is an important link in the battery production process. In the subsequent process, the pole piece needs to be wound or stacked together with the diaphragm to form a battery cell. In order to avoid the pole piece burr cutting the diaphragm, the remaining The burrs must be controlled within the range of 12μm or even smaller. On the other hand, in order to ensure the precise size of the pole piece, the punching accuracy of the die and punch also needs to meet extremely high requirements. [0003] The existing pole piece punching mechanism is still difficult to meet the punching needs, and there is a problem of high defect rate, especially in the case of punching both sides of the pole piece at the same time, the burr and precision requirements cannot be gua...

AI Technical Summary

Problems solved by technology

[0003] The existing pole piece punching mechanism is still difficult to meet the punching needs, and there is a problem of high defect rate, especially in the case of punching both sides of the pole piece at the same time, the burr and precision requirements cannot be guaranteed

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