CN216965444U

CN216965444U - Lithium ion battery pole piece folding tab detection device

Info

Publication number: CN216965444U
Application number: CN202220145415.8U
Authority: CN
Inventors: 王洪卫
Original assignee: Hefei Guoxuan High Tech Power Energy Co Ltd
Current assignee: Hefei Gotion High Tech Power Energy Co Ltd
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-07-15
Anticipated expiration: 2032-01-19

Abstract

The utility model discloses a lithium ion battery pole piece folded tab detection device, which comprises a knife rest, a first base and a folded tab infrared sensor, wherein the knife rest is arranged on the first base; the first base is fixedly arranged on the tool rest; the infrared inductor with the folded tabs is fixedly arranged on the first base; the detection light beam of the infrared sensor for the folded tab is located at the tab, and the distance between the detection position of the tab and the edge of the pole piece provided with the tab of the infrared sensor for the folded tab is equal. The utility model has simple and practical structure and easy realization, and can select the winding core with the folded tab, thereby ensuring the quality of the winding core in the winding process.

Description

Lithium ion battery pole piece folding tab detection device

Technical Field

The utility model relates to the technical field of battery manufacturing, in particular to a lithium ion battery pole piece folded tab detection device.

Background

The ion battery is the most advanced commercial secondary battery in the world at present, and with the development of various electronic products, the demand for the lithium ion battery is rapidly increased, the expansion of the battery application field and the increase of the battery demand, so that a battery manufacturer needs to simplify the process flow, shorten the process time to improve the production efficiency to meet the market requirement, and continuously improve the comprehensive electrochemical performance of the battery to meet the application requirement. The manufacturing of a lithium ion battery is a complex process, which includes a plurality of different processes, each of which includes many small processes, and the process effect of each process has a great influence on the electrochemical performance of the lithium ion battery.

The winding process of the lithium ion battery cell is one of the key processes for manufacturing the lithium ion battery, and in the winding process, the pole lugs are folded due to the fact that the pole lugs generate fish scale marks at the blank positions in the rolling process and crescent marks generated by a roller are cut by laser and the like, so that the core short circuit and other defects are caused, and therefore, the folded pole lugs are required to be detected.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: the detection device can detect the broken tabs of the lithium ion battery pole pieces.

In order to solve the technical problems, the utility model provides the following technical scheme:

a lithium ion battery pole piece folded tab detection device comprises a knife rest, a first base and a folded tab infrared sensor;

the first base is fixedly arranged on the tool rest; the infrared inductor with the folded tab is fixedly arranged on the first base;

and the detection light beam of the infrared sensor for the folded tab is positioned at the tab.

The advantages are that: the utility model has simple and practical structure and easy realization, and can select the winding core with the folded tab, thereby ensuring the quality of the winding core in the winding process.

Preferably, the device also comprises a second base and a pole piece deviation rectifying inductor;

the second base is fixedly arranged on the tool rest, and the pole piece deviation rectifying inductor is fixedly arranged on the second base;

the detection position of the pole piece deviation rectifying sensor is located on one side edge of the pole piece.

Preferably, the knife rest is of a U-shaped structure, and the first base, the folded tab infrared inductor, the second base and the pole piece deviation rectifying inductor are all arranged on the same side of the knife rest of the U-shaped structure.

Preferably, a first base, a folding tab infrared inductor, a second base and a pole piece deviation rectifying inductor are arranged on each of the two U-shaped feet of the tool rest.

Preferably, the side edge of the pole piece detected by the pole piece deviation rectifying sensor is the side edge far away from one side of the pole lug.

Preferably, the distance between the detection position of the folded tab infrared sensor on the tab and the edge of the pole piece provided with the tab is two thirds of the height of the tab.

Compared with the prior art, the utility model has the beneficial effects that: the utility model has simple and practical structure and easy realization, and can select the winding core with the folded tab, thereby ensuring the quality of the winding core in the winding process.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic diagram of the working principle of an embodiment of the present invention;

fig. 3 is a comparative schematic view of a folded tab and a normal tab of an embodiment of the present invention.

Detailed Description

In order to facilitate the understanding of the technical solutions of the present invention for those skilled in the art, the technical solutions of the present invention will be further described with reference to the drawings attached to the specification.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 and fig. 2, the embodiment discloses a lithium ion battery pole piece folded tab detection device, which includes a tool rest 1, a first base 2, a folded tab infrared sensor 3, a second base 4, and a pole piece deviation-rectifying sensor 5.

The first base 2 and the second base 4 are fixedly arranged on the tool rest 1; folding utmost point ear infrared inductor 3 fixed mounting is on first base 2, and pole piece sensor 5 fixed mounting that rectifies is on second base 4.

When the pole piece 6 moves, the infrared inductor 3 for bending the pole lug detects the pole lug 7, and the deviation-rectifying inductor 5 for the pole piece detects one side edge of the pole piece 6.

The knife rest 1 of this embodiment is U type structure, and first base 2, folding utmost point ear infrared inductor 3, second base 4, pole piece sensor 5 of rectifying all set up in one side, and pole piece 6 is at the uniform motion about the U-shaped intracavity of knife rest 1. After the detection device of this embodiment is installed, the pole piece deviation-rectifying sensor 5 can detect the side edge of the pole piece 6, and when the pole piece deviation-rectifying sensor 5 detects that the movement of the pole piece 6 deviates from the set track, readjustment is required.

If pole piece 6 is not skew to set for the track, the utmost point ear infrared inductor 3 of rolling over can detect utmost point ear 7, and in the motion process of pole piece 6, can calculate the length of utmost point ear 7 relevant position through the time of rolling over utmost point ear infrared inductor 3 to sense utmost point ear 7.

If the electrode lug 7 is folded, the length of the electrode lug detected by the folded electrode lug infrared sensor 3 is correspondingly reduced, so that the length of the electrode lug detected by the folded electrode lug infrared sensor 3 is compared with the normal length of the electrode lug, and if the lengths are similar, the electrode lug 7 is not folded; otherwise, it indicates that the tab 7 is folded.

In some embodiments, the side of the pole piece 6 detected by the pole piece deviation rectifying sensor 5 is the side far away from the side of the tab 7. The pole piece 6 on the side has no influence of the pole lug 7, and the better detection effect of the pole piece deviation rectifying inductor 5 can be ensured.

In some embodiments, the distance between the detection position of the tab 7 and the edge of the pole piece 6 provided with the tab 7 of the folded tab infrared sensor 3 is two thirds of the height of the tab 7; namely, the detection position is the position of the middle upper part of the tab 7. Referring to fig. 3, when the tab 7 is folded, the tab length at this position has enough shortening to be distinguished from the length of a normal tab compared to the more inward position; simultaneously compare rather than the position that leans on more outward, can avoid folding down inside because of most advanced utmost point ear 7, and lead to folding down utmost point ear infrared inductor 3 and miss the problem of examining folding down utmost point ear. Therefore, the detection of the tab 7 at the position is folded, so that the detection accuracy of the tab 7 is ensured, and the problem of folding the tab due to missed detection is also avoided.

In some embodiments, the first base 2, the folded tab infrared sensor 3, the second base 4, and the pole piece deviation rectifying sensor 5 are disposed on both U-shaped legs of the U-shaped tool rest 1. The infrared sensors 3 at the two ends of the folded tab detect the length of the tab 7 together, so that the detection precision is improved.

The working principle of the embodiment is as follows:

firstly, adjusting a folded tab infrared inductor 3 and a pole piece deviation-rectifying inductor 5, then controlling a pole piece 6 to move in a tool rest 1, detecting whether the pole piece 6 deviates or not by the pole piece deviation-rectifying inductor 5, and if the pole piece 6 deviates, adjusting in time; if the pole piece 6 is not deviated, the operation is continued.

The length of the corresponding position of the tab 7 is detected by the folded tab infrared sensor 3 and compared with the length of the position of the normal tab 7, so that whether the tab 7 is folded or not is judged.

And if the tab 7 is folded, selecting the roll core where the folded tab is located, and manually processing the roll core.

The simple structure of this embodiment is practical, realizes easily, can select out the book core of the utmost point ear of rolling over to guarantee the quality that the core was rolled up in the coiling process.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

The above-mentioned embodiments only represent the embodiments of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the concept of the present invention, and these embodiments are all within the protection scope of the present invention.

Claims

1. The utility model provides a lithium ion battery pole piece utmost point ear detection device that rolls over which characterized in that: comprises a knife rest (1), a first base (2) and a folding tab infrared inductor (3);

the first base (2) is fixedly arranged on the tool rest (1); the infrared inductor (3) with the folded tab is fixedly arranged on the first base (2);

and the detection light beam of the infrared sensor (3) for folding the tab is positioned at the tab (7).

2. The lithium ion battery pole piece folded tab detection device of claim 1, wherein: the device also comprises a second base (4) and a pole piece deviation rectifying inductor (5);

the second base is fixedly arranged on the tool rest (1), and the pole piece deviation rectifying inductor (5) is fixedly arranged on the second base (4);

the detection position of the pole piece deviation rectifying sensor (5) is positioned on one side edge of the pole piece (6).

3. The lithium ion battery pole piece folded tab detection device of claim 2, wherein: the utility model discloses a pole piece deviation rectifying device, including knife rest (1), first base (2), folding utmost point ear infrared inductor (3), second base (4) and pole piece deviation rectifying inductor (5), first base (2) are the U type structure, first base (3), folding utmost point ear infrared inductor (3) and pole piece deviation rectifying inductor (5) all set up at the U type structure the homonymy of knife rest (1).

4. The lithium ion battery pole piece folded tab detection device of claim 3, wherein: a first base (2), a folding tab infrared inductor (3), a second base (4) and a pole piece deviation rectifying inductor (5) are arranged on two U-shaped legs of the knife rest (1).

5. The lithium ion battery pole piece folded tab detection device of claim 2, wherein: the side edge of the pole piece (6) detected by the pole piece deviation rectifying sensor (5) is the side edge far away from one side of the pole lug (7).

6. The lithium ion battery pole piece folded tab detection device of claim 1, wherein: the distance between the detection position of the infrared sensor (3) for the folded tab (7) and the edge of the pole piece (6) provided with the tab (7) is two thirds of the height of the tab (7).