CN211733249U

CN211733249U - Lithium battery diaphragm slitting device

Info

Publication number: CN211733249U
Application number: CN201921233765.4U
Authority: CN
Inventors: 刘向春
Original assignee: Shenzhen Dingtaixiang New Energy Technology Co ltd
Current assignee: Shenzhen Dingtaixiang New Energy Technology Co ltd
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2020-10-23
Anticipated expiration: 2029-07-30

Abstract

The utility model belongs to the technical field of machinery, a device is cut to lithium cell diaphragm is provided. The lithium battery diaphragm slitting device comprises an unwinding roller, a winding roller, a slitting cutter head and traction rollers which are arranged in front of and behind the slitting cutter head and extend upwards along a diaphragm, and both sides of the diaphragm at the slitting cutter head in the moving direction are provided with blowing and dust removing mechanisms. According to the utility model discloses a device is cut to lithium cell diaphragm in time clears away the dust of cutting the process production, and the coating powder granule card that prevents to drop has avoided the damage to cutting the tool bit to the blade edge of a knife or drop above the equipment or cut the membrane book, reduces the production of cutting diaphragm process defective products, improves and cuts efficiency.

Description

Lithium battery diaphragm slitting device

Technical Field

The utility model relates to a lithium battery diaphragm aftertreatment device especially relates to a lithium battery diaphragm cuts device.

Background

The lithium battery diaphragm plays important roles of conducting ions, isolating positive and negative levels of the battery, preventing short circuit and packaging of the battery and the like in the lithium battery, and the common battery diaphragm is a porous film taking polyolefin as a raw material. However, these separators generally have disadvantages such as insufficient heat resistance and poor wettability with an electrolyte. In order to improve these disadvantages, techniques for special coating on battery separators, mainly including polymer coatings and ceramic coatings, have been developed.

The special coating is introduced through a special coating mode, and the special coating diaphragm has a lot of improvement in performance compared with a polyolefin diaphragm. However, the base film material is usually a nonpolar material such as polyolefin, the bonding force between the coating layer of the coating diaphragm and the base film is weak, the coating material is easy to fall off from the base film in the slitting process, and particularly when the slitting blade cuts the coating diaphragm at high speed, the contact part of the coating layer and the blade moves at high speed to cause part of the coating layer to fall off. The uniformity of the coating is seriously influenced by the falling off of the coating, and the coating has adverse effects on the thickness of a coating diaphragm, a ventilation value, thermal shrinkage, a liquid absorption rate, the wettability of electrolyte, the ionic resistance and the interface internal resistance of a battery assembled with the battery, the safety and other properties. In addition, the coating powder particles which fall off are usually clamped between the slitting blade and the diaphragm, so that the cutting blade is worn and scrapped, the edge of the slit diaphragm is deformed, and the like. Often, this is the case, stopping the machine to clean the blades or replace the blades, which is time consuming, labor intensive, and wasteful of the membrane.

SUMMERY OF THE UTILITY MODEL

To prior art's defect, the utility model aims at providing a device is cut to lithium cell diaphragm.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a device is cut to lithium cell diaphragm, includes unreel roller, wind-up roll, cuts the tool bit and goes upward at the carry over pinch rolls of cutting tool bit place ahead and rear along the diaphragm both sides in the diaphragm trend of cutting tool bit department all are equipped with sweeps dust removal mechanism.

And both sides of the diaphragm at the slitting cutter head in the moving direction are provided with dust detectors.

And a tension breaking roller is arranged on one side of the traction roller, and the diaphragm is conveyed between the traction roller and the tension roller.

The winding device is provided with two winding rollers, one side of each winding roller is provided with a winding compression roller, and the diaphragm is wound between the winding rollers and the winding compression rollers.

The utility model has the advantages that: the dust that the process of cutting produced is in time clear away, and the coating powder granule card that prevents to drop has avoided the damage to cutting the tool bit to the blade edge of a knife or has dropped on the equipment or cut the membrane book on, reduces the production of cutting the diaphragm process defective products, improves and cuts efficiency.

Drawings

Fig. 1 is a schematic view of a diaphragm slitting device according to a preferred embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings by way of examples.

Referring to fig. 1, a lithium battery diaphragm cutting device includes unreeling roller 1, first carry over pinch rolls 2, unreels tension and separates disconnected roller 3, cuts tool bit 4, upward sweeps dust removal mechanism 5, sweeps dust removal mechanism 6 down, second carry over pinch rolls 7, cuts tension and separates disconnected roller 8, third carry over pinch rolls 9, rolling tension and separate disconnected roller 10, first wind-up roll 11, first rolling compression roller 12, second wind-up roll 13 and second rolling compression roller 14.

The lithium battery diaphragm is unreeled by the unreeling roller 1, is dragged by the first traction roller 2, the second traction roller 7 and the third traction roller 9, is cut by the cutting tool bit 4 according to a set specification, and is finally reeled by the first reeling roller 11 or the second reeling roller 13 to obtain a finished product.

An upper blowing and dust removing mechanism 5 and a lower blowing and dust removing mechanism 6 are respectively arranged above and below the slitting tool bit 4. Not shown in the figure, dust detectors are also attached to both sides of the slitting tool head 4. And after the dust detector detects that dust exists on the two sides of the slitting cutter head, the control part starts the upper blowing and dust removing mechanism 5 or the lower blowing and dust removing mechanism 6 to work so as to blow and clean the dust on the two sides of the slitting cutter head 4 or on the cut diaphragm.

An unwinding tension separating roller 3 is arranged on one side of the first traction roller 2, and the diaphragm passes between the first traction roller and the second traction roller so as to reduce the interference of the unwinding tension on the traction force of the diaphragm and enable the diaphragm to move forwards more stably. The first traction roller 2 and the second traction roller 7 are respectively arranged in front of and behind the slitting cutter head. A slitting tension isolating roller 8 is arranged on one side of the second traction roller 7, a rolling tension isolating roller 10 is arranged on one side of the third traction roller 9, and the arrangement position and the function are similar to those of the previous device.

One side of first wind-up roll 11 or second wind-up roll 13 is equipped with first rolling compression roller 12 or second rolling compression roller 14 respectively, and the diaphragm via by the rolling between wind-up roll and the rolling compression roller, the effect of rolling compression roller makes the rolling process steady more orderly, avoids disturbing.

The foregoing is a more detailed description of the invention, taken in conjunction with the accompanying preferred embodiments, and the specific embodiments of the invention are not intended to be limiting.

Claims

1. The utility model provides a device is cut to lithium cell diaphragm, includes unreel roller, wind-up roll, cuts the tool bit and go upward at the carry over pinch rolls of cutting tool bit place ahead and rear along the diaphragm, its characterized in that: the two sides of the diaphragm at the position of the slitting tool bit in the moving direction are respectively provided with a sweeping dust removal mechanism, the upper portion of the slitting tool bit is provided with the sweeping dust removal mechanism, and the lower portion of the slitting tool bit is provided with the sweeping dust removal mechanism.

2. The lithium battery separator slitting device according to claim 1, characterized in that: and both sides of the diaphragm at the slitting cutter head in the moving direction are provided with dust detectors.

3. The lithium battery separator slitting device according to claim 1 or 2, characterized in that: and a tension breaking roller is arranged on one side of the traction roller, and the diaphragm is conveyed between the traction roller and the tension roller.

4. The lithium battery separator slitting device according to claim 1 or 2, characterized in that: the winding device is provided with two winding rollers, one side of each winding roller is provided with a winding compression roller, and the diaphragm is wound between the winding rollers and the winding compression rollers.