CN211615829U

CN211615829U - Pole piece tab fillet one-time forming device

Info

Publication number: CN211615829U
Application number: CN201922215952.6U
Authority: CN
Inventors: 奉军; 吴松彦
Original assignee: Guangdong Yixinfeng Intelligent Equipment Co ltd
Current assignee: Guangdong Yixinfeng Intelligent Equipment Co ltd
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-10-02
Anticipated expiration: 2029-12-10

Abstract

The utility model relates to a pole piece forming technology field, concretely relates to pole piece utmost point ear fillet one shot forming device, including the cutter that is used for cutting off the pole piece coil stock, be used for cutting off the die-cut mould of utmost point ear and fillet with the pole piece after cutting off, the die-cut mould includes first die-cut portion and second die-cut portion, first die-cut portion includes first edge of a knife and second edge of a knife, second die-cut portion includes third edge of a knife and fourth edge of a knife, first edge of a knife is provided with first utmost point ear edge of a knife, the second edge of a knife is provided with second utmost point ear edge of a knife; the utility model discloses a with the chamfer shaping of utmost point ear and pole piece after once die-cut, saved and need set up utmost point ear mould structure at the front end, and then promoted pole piece film-making efficiency. The pole piece is cut off and then the pole lug and the chamfer are punched, so that the chamfer of the pole piece is more smooth, the pole piece is more flexible, the problem that the pole piece pierces a diaphragm in the lamination process is solved, and the safety of a battery cell is further enhanced.

Description

Pole piece tab fillet one-time forming device

Technical Field

The utility model relates to a pole piece shaping technical field especially relates to a pole piece utmost point ear fillet one shot forming device.

Background

The lithium ion battery is a new generation of green high-energy battery with excellent performance, and has become one of the key points of high and new technology development. The lithium ion battery has the following characteristics: high voltage, high capacity, low consumption, no memory effect, no public hazard, small volume, small internal resistance, less self-discharge and more cycle times. Because of the above characteristics, lithium ion batteries have been applied to various civil and military fields such as mobile phones, notebook computers, video cameras, digital cameras, and the like.

The pole piece is used as an important component of the lithium battery and plays an important role in the performance of the battery. The pole piece is manufactured by coating the two side surfaces of the base material with the pole powder material, and die-cutting the coated base material to obtain the pole piece with the required size and shape.

In the prior art, chinese patent publication No. CN104852014A discloses an apparatus for preparing lithium ion battery electrode sheet elements, as shown in fig. 3 to 4, which aims to prepare the required special-shaped lithium ion battery electrode sheet elements with various shapes by adjusting the mutual position between a first forming cutting die and a second forming cutting die or replacing different types of cutting dies. In actual use, no matter the fillet to the pole piece or the lug molding all exist not enough, the structure of cutting off after can't be made into pure fillet, still there is the hidden danger.

In the prior art, chinese patent publication No. CN110125232A discloses a pole piece punching device and a control method thereof, as shown in fig. 5 to 6, the purpose of which is to cut round corners of specification, improve the rate of high-quality products of pole pieces, and reduce the potential safety hazard of piercing a diaphragm. In actual use, no matter the fillet to the pole piece or the lug molding all exist not enough, the structure of cutting off after can't be made into pure fillet, still there is the hidden danger.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides an adopt after once die-cut with the chamfer shaping of utmost point ear and pole piece, saved and need set up utmost point ear mould structure at the front end, and then promote pole piece film-making efficiency. Carry out die-cut utmost point ear and chamfer after cutting off the pole piece earlier for the pole piece chamfer is more mellow and more smooth, makes the pole piece more have flexibility, has solved the pole piece and has produced the problem of impaling the diaphragm at lamination in-process, and then strengthens the pole piece utmost point ear fillet one shot forming device of the security of electric core.

The utility model adopts the technical proposal that: the utility model provides a pole piece utmost point ear fillet one shot forming device, includes the cutter that is used for cutting off the pole piece coil stock for will cut out the die-cut mould of utmost point ear and fillet after cutting off the pole piece, die-cut mould includes first die-cut portion and the die-cut portion of second, first die-cut portion includes first edge of a knife and the second edge of a knife, the die-cut portion of second includes the third edge of a knife and the fourth edge of a knife, first edge of a knife is provided with the first utmost point ear edge of a knife, the second edge of a knife is provided with the second utmost point ear edge.

The further improvement of the scheme is that the first punching part and the second punching part are both single punching structures, the first cutting edge and the second cutting edge are both arranged in the first punching part, and the third cutting edge and the fourth cutting edge are both arranged in the second punching part.

The further improvement of the scheme is that the first punching part comprises a first punching piece and a second punching piece, the first knife edge is arranged on the first punching piece, and the second knife edge is arranged on the second punching piece.

The further improvement of the scheme is that the second punching part comprises a third punching part and a fourth punching part, the third knife edge is arranged on the third punching part, and the fourth knife edge is arranged on the fourth punching part.

The scheme is further improved in that the first knife edge, the second knife edge, the third knife edge and the fourth knife edge are all chamfer knife edges, and the chamfer knife edges are arranged at one of C corners or round corners.

The utility model has the advantages that:

compare traditional pole piece forming process, the utility model discloses it is simpler at the shaping process, and the shaping effect is better, specifically adopt the chamfer shaping of a die-cut back with utmost point ear and pole piece, saved and need set up utmost point ear mould structure at the front end, and then promote pole piece film-making efficiency. The pole piece is cut off and then the pole lug and the chamfer are punched, so that the chamfer of the pole piece is more smooth, the pole piece is more flexible, the problem that the pole piece pierces a diaphragm in the lamination process is solved, and the safety of a battery cell is further enhanced.

Drawings

Fig. 1 is a schematic working diagram of embodiment 1 of the present invention;

fig. 2 is a schematic working diagram of embodiment 2 of the present invention;

FIG. 3 is a schematic diagram of the conventional pole piece forming operation of the present invention;

FIG. 4 is a schematic diagram of another conventional pole piece forming operation of the present invention;

FIG. 5 is a schematic diagram of another conventional pole piece forming operation of the present invention;

fig. 6 is a schematic view of another conventional pole piece forming operation of the present invention.

Description of reference numerals: the cutting knife 110, the first blanking portion 120, the first knife edge 121, the second knife edge 122, the first tab knife edge 123, the second tab knife edge 124, the first blanking piece 125, the second blanking piece 126, the second blanking portion 130, the third knife edge 131, the fourth knife edge 132, the third blanking piece 133, and the fourth blanking piece 134.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1-2, an apparatus for one-step forming of a pole piece tab fillet includes a cutter 110 for cutting off a pole piece coil, and a punching mold for cutting off a tab and a fillet from a cut-off pole piece, the punching mold includes a first punching portion 120 and a second punching portion 130, the first punching portion 120 includes a first knife edge 121 and a second knife edge 122, the second punching portion 130 includes a third knife edge 131 and a fourth knife edge 132, the first knife edge 121 is provided with a first tab knife edge 123, and the second knife edge 122 is provided with a second tab knife edge 124.

Example 1

In this embodiment, the first punching portion 120 and the second punching portion 130 are both single punching structures, the first blade 121 and the second blade 122 are both opened in the first punching portion 120, the third blade 131 and the fourth blade 132 are both opened in the second punching portion 130, and a single punching structure is adopted, so that two groups of pole pieces in an interval can be punched after separation, and a punching effect is good.

Example 2

In this embodiment, the difference from the above embodiment 1 is that the first punching portion 120 includes a first punching piece 125 and a second punching piece 126, the first blade 121 is provided on the first punching piece 125, the second blade 122 is provided on the second punching piece 126, and the further improvement is that the second punching portion 130 includes a third punching piece 133 and a fourth punching piece 134, the third blade 131 is provided on the third punching piece 133, the fourth blade 132 is provided on the fourth punching piece 134, and a plurality of groups of punching structures are adopted, so that four corners are punched at the same time after the pole piece is cut to form a pole piece and a chamfer, and similarly, the pole piece and the chamfer can be formed by punching at one time.

The first knife edge 121, the second knife edge 122, the third knife edge 131 and the fourth knife edge 132 are chamfering knife edges, the chamfering knife edges are arranged in a C-shaped corner or a round angle, different chamfering structures can be selected as required, the rounding structures are generally preferred, flexibility is guaranteed after pole pieces are formed, and safety is improved.

The one-step forming process for the pole piece lug fillet comprises a one-step forming device for the pole piece lug fillet, and comprises the following steps:

step 1, cutting a pole piece coil into pole pieces through a cutter 110;

and 2, cutting the pole piece, and punching the pole piece by a die to form a pole lug and a chamfer.

In step 2, the pole piece is punched and formed into the tab and the chamfer at one time through the first punching part 120 and the second punching part 130.

In step 2, the first punching part 120 punches the tab and the chamfer from the tab through the first knife edge 121, the second knife edge 122, the first tab knife edge 123 and the second tab knife edge 124.

In step 2, the second punching section 130 cuts a chamfer to the pole piece through the third blade 131 and the fourth blade 132.

Adopt two portions can be with the pole piece shaping, utmost point ear and chamfer are one shot forming, and the shaping is effectual, saves the station, raises the efficiency.

The utility model discloses it is simpler at the forming process, the shaping effect is better, specifically adopt the chamfer shaping of a die-cut back with utmost point ear and pole piece, saved and need set up utmost point ear mould structure at the front end, and then promote pole piece film-making efficiency. The pole piece is cut off and then the pole lug and the chamfer are punched, so that the chamfer of the pole piece is more smooth, the pole piece is more flexible, the problem that the pole piece pierces a diaphragm in the lamination process is solved, and the safety of a battery cell is further enhanced.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a pole piece utmost point ear fillet one shot forming device which characterized in that: including being used for cutting off the cutter of pole piece coil stock for will cut off the die-cut mould of back pole piece surely utmost point ear and fillet, die-cut mould includes first die-cut portion and the die-cut portion of second, first die-cut portion includes first edge of a knife and the second edge of a knife, the die-cut portion of second includes the third edge of a knife and the fourth edge of a knife, first edge of a knife is provided with the first utmost point ear edge of a knife, the second edge of a knife is provided with the second utmost point ear edge of a knife.

2. The one-step forming device for the fillet of the pole piece and the tab of claim 1 is characterized in that: first die-cut portion is single die-cut structure with the die-cut portion of second, first edge of a knife and second edge of a knife are all seted up in first die-cut portion, the die-cut portion of second is all seted up to third edge of a knife and fourth edge of a knife.

3. The one-step forming device for the fillet of the pole piece and the tab of claim 1 is characterized in that: first die-cut portion includes first die-cut piece and second die-cut piece, first knife edge is seted up in first die-cut piece, the second knife edge is seted up in second die-cut piece.

4. The one-step forming device for the fillet of the pole piece and the tab of claim 3 is characterized in that: the second punching part comprises a third punching part and a fourth punching part, the third knife edge is arranged on the third punching part, and the fourth knife edge is arranged on the fourth punching part.

5. The one-step forming device for the fillet of the pole piece and the tab of claim 1 is characterized in that: the first knife edge, the second knife edge, the third knife edge and the fourth knife edge are all chamfer knife edges, and the chamfer knife edges are arranged at one of C corners or round corners.