Battery pole piece cutting-off equipment and battery pole piece cutting-off method

Abstract

The invention discloses battery pole piece cutting-off equipment and a battery pole piece cutting-off method. The battery pole piece cutting-off equipment comprises a feeding device, a cutting knife device, a supporting device and a coiling device, wherein the feeding device is used for sending out a first diaphragm, a pole piece and a second diaphragm which are sequentially overlapped at the same feeding speed; the cutting knife device is arranged at the downstream of the feeding device and comprises a knife rest and a cutting knife fixed on the knife rest; the knife rest is used for pressing the cutting knife towards the first diaphragm by moving or autorotating and cutting off only the pole piece from the first diaphragm side by being separated by the first diaphragm; the supporting device is opposite to the cutting knife device by being separated by the first diaphragm, the pole piece and the second diaphragm so as to support the cutting knife below the second diaphragm when the cutting knife is pressed towards the first diaphragm; and the coiling device is arranged at the downstream of the cutting knife device and is used for coiling the first diaphragm, the cut-off pole piece and the second diaphragm together. The battery pole piece cutting-off equipment can avoid adhesion of the pole piece to a knife edge of the cutting knife and pollution to the knife edge, avoid deformation of the pole piece, and omit a step of fixing the pole piece and the diaphragm through an adhesive tape, thus simplifying the manufacturing process of a battery.

Description

technical field [0001] The invention relates to the technical field of chemical power sources, in particular to a battery pole piece cutting device and a battery pole piece cutting method. Background technique [0002] The manufacturing method of the battery includes the process of stacking and winding the pole piece and the diaphragm to form a battery core. In the process of forming the battery cell, the pole piece needs to be cut to a required length, and the end of the cut pole piece needs to be fixed to the separator. Such as figure 1 As shown, the pole piece 5' from the feeding device (not shown) is cut by the cutting knife 21' from top to bottom to have the required length, and the end of each cut pole piece 5' is passed through The tape 9' is secured to the membrane 6'. It can be understood that in the prior art, when cutting the pole piece 5', the edge of the cutter 21' directly contacts the pole piece 5', and the pole piece 5' is generally made of a soft metal ma...

AI Technical Summary

Problems solved by technology

It can be understood that in the prior art, when cutting the pole piece 5', the edge of the cutter 21' directly contacts the pole piece 5', and the pole piece 5' is generally made of a soft metal material (such as lithium or lithium alloy), so that it is extremely Material on sheet 5' tends to stick to the knife edge and contaminate the knife edge

In addition, if figure 2 As shown, since the pole piece 5' is relatively soft, when the cutter 21' moves upward after cutting off the pole piece 5', it may also lift up the end of the cut off pole piece 5', causing it to deform

And as mentioned above, each pole piece 5' needs to be fixed with the separator 6' by the adhesive tape 9', which makes the manufacturing process of the battery more complicated

Images