Diaphragm reel with variable profile

Abstract

The invention relates to the technical field of reels, in particular to a diaphragm reel with a variable profile, comprising: a reel body for winding the diaphragm, the reel body is a hollow cylindrical structure, and the periphery of the reel body is surrounded by multiple One arc-shaped piece, one side of the arc-shaped piece is flexibly connected with the outer circumference of the reel body, the other side of the arc-shaped piece is a free end, a plurality of arc-shaped pieces surround the outer periphery of the reel body in turn, and the reel body is provided with There are multiple openings, and the openings correspond to the arc-shaped pieces one by one. There are also multiple movable pressing blocks on the reel body, and the multiple movable pressing blocks correspond to the multiple openings one by one. There is an air expansion layer, and the movable pressing block can move along the radial direction of the reel body in the corresponding opening through the inflation and deflation of the air expansion layer. The variable profile diaphragm reel of the present invention can conveniently inspect the winding front and back of the inner roll film, reduce the internal stress generated by the diaphragm during winding, and reduce the bottom wrinkle and edge collapse of the roll.

Description

technical field [0001] The invention relates to the technical field of reels, in particular to a variable-profile diaphragm reel. Background technique [0002] The existing lithium battery diaphragm reel is attached figure 1 As shown, it is a hollow cylindrical structure. When used, there are the following problems: [0003] 1. The new roll needs to be coated with glue on the reel to connect the lithium battery diaphragm. When the lithium battery diaphragm is pasted with glue, because the lithium battery diaphragm has many micropores, the glue will penetrate into the multi-layer lithium battery diaphragm, and the glue will affect the lithium battery diaphragm. Harmful, the lithium battery separator penetrated by glue is unusable, and it will cause waste of the multi-layer lithium battery separator at the bottom of the roll. [0004] 2. When rewinding the lithium battery separator, if only one roll is wound, the positive and negative sides of the wound lithium battery separ...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to solve the waste of the multi-layer diaphragm at the bottom of the roll when the lithium battery diaphragm is pasted by glue in the prior art, and when two rolls of diaphragm are wound, the positive and negative sides of the internally wound diaphragm cannot be judged, and when the diaphragm is wound. Excessive internal stress causes damage to the diaphragm and wrinkles on the bottom of the roll

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