CN217788499U

CN217788499U - Electricity core coiling apparatus and battery production line

Info

Publication number: CN217788499U
Application number: CN202222028315.XU
Authority: CN
Inventors: 不公告发明人
Original assignee: Sany Technology Equipment Co Ltd
Current assignee: Sany Technology Equipment Co Ltd
Priority date: 2022-08-02
Filing date: 2022-08-02
Publication date: 2022-11-11
Anticipated expiration: 2032-08-02

Abstract

The utility model provides an electricity core take-up device and battery production line, wherein, electricity core take-up device, include: a frame; the unwinding units are arranged on the rack, and each unwinding unit comprises a positive plate unwinding mechanism, a negative plate unwinding mechanism and two diaphragm unwinding mechanisms; and the winding mechanism is arranged on the rack and is suitable for winding the materials unwound by the unwinding units into the battery cell. Because the frame is provided with a plurality of unreeling units, when a certain material belt has a defect, the length of the scrapped material belt is less. Taking the two winding and unwinding units as an example, if the positive plate material belt is found to have a defect when the battery cell is wound, the positive plate material belt only needs to be scrapped by a length of one half of the sheet length. Similarly, if the number of the winding and unwinding units is three, only one third of the length of the sheet is scrapped, and so on.

Description

Electricity core coiling mechanism and battery production line

Technical Field

The utility model relates to a battery production facility technical field, concretely relates to electricity core take-up device and battery production line.

Background

Cell winding is one of the processes for producing lithium batteries. In the prior art, when winding a battery cell, a layer of positive plate, a layer of negative plate and two layers of diaphragms are stacked and fixed on a winding head for winding. However, if one of the strips becomes defective, a full length of strip needs to be discarded, resulting in wasted material.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming electric core among the prior art when convoluteing, if take the material and appear the defect, then need scrap a whole long material area of piece, lead to the extravagant defect of material to an electric core take-up device and battery production line are provided.

In order to solve the above problem, the utility model provides an electricity core take-up device, include: a frame; the unwinding units are arranged on the rack, and each unwinding unit comprises a positive plate unwinding mechanism, a negative plate unwinding mechanism and two diaphragm unwinding mechanisms; and the winding mechanism is arranged on the rack and is suitable for winding the materials unreeled by the unreeling units into the battery cells.

Optionally, the number of the unwinding units is two, and the two unwinding units are respectively located on two sides of the winding mechanism.

Optionally, the positive plate unwinding mechanism includes a first rotating shaft, the negative plate unwinding mechanism includes a second rotating shaft, and the diaphragm unwinding mechanism includes a third rotating shaft.

Optionally, a first tensioning mechanism is arranged downstream of the positive plate unwinding mechanism.

Optionally, a second tensioning mechanism is arranged downstream of the negative plate unwinding mechanism.

Optionally, a third tensioning mechanism is disposed downstream of the diaphragm unwinding mechanism.

Optionally, the unwinding unit further includes a first material converging mechanism, the first material converging mechanism is disposed downstream of the positive electrode sheet unwinding mechanism and one of the diaphragm unwinding mechanisms, and the first material converging mechanism is adapted to converge the materials unwound by the positive electrode sheet unwinding mechanism and one of the diaphragm unwinding mechanisms.

Optionally, the unwinding unit further comprises a second material collecting mechanism, the second material collecting mechanism is arranged downstream of the negative electrode sheet unwinding mechanism and the other membrane unwinding mechanism, and the second material collecting mechanism is suitable for collecting materials unwound by the negative electrode sheet unwinding mechanism and the other membrane unwinding mechanism.

Optionally, the first collecting mechanism and the second collecting mechanism are both collecting rollers.

The utility model also provides a battery production line, including foretell electric core take-up device.

The utility model has the advantages of it is following:

utilize the technical scheme of the utility model, because be provided with a plurality of units that unreel in the frame, therefore when defect appears in certain material area, then condemned material area length is less. Taking the two winding and unwinding units as an example, if the positive plate material belt is found to have a defect when the battery cell is wound, the positive plate material belt only needs to be scrapped by a length of one half of the sheet length. Similarly, if the number of the winding and unwinding units is three, only one third of the length of the sheet is scrapped, and so on. Consequently the technical scheme of the utility model the electric core among the prior art has been solved when convoluteing, if the material takes the defect to appear, then need scrap the long material area of a whole piece, lead to the extravagant defect of material.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 shows a schematic structural diagram of a first embodiment of a cell winding device according to the present invention; and

fig. 2 shows a schematic structural diagram of a second embodiment of the cell winding device of the present invention.

Description of the reference numerals:

10. a frame; 20. an unwinding unit; 21. the positive plate unwinding mechanism; 22. the negative plate unwinding mechanism; 23. a diaphragm unwinding mechanism; 30. a winding mechanism; 40. a first tensioning mechanism; 50. a second tensioning mechanism; 60. a third tensioning mechanism; 70. a first material collecting mechanism; 80. and the second material gathering mechanism.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example one

As shown in fig. 1, the battery cell winding apparatus according to the first embodiment includes a rack 10, a plurality of unwinding units 20, and a winding mechanism 30. The unreeling units 20 are arranged on the frame 10, and each unreeling unit 20 includes a positive plate unreeling mechanism 21, a negative plate unreeling mechanism 22 and two diaphragm unreeling mechanisms 23. The winding mechanism 30 is disposed on the rack 10, and the winding mechanism 30 is adapted to wind the material unwound by the plurality of unwinding units 20 into a battery cell.

By using the technical scheme of this embodiment, since the plurality of unwinding units 20 are disposed on the rack 10, when a certain material tape is defective, the length of the scrapped material tape is small. Taking two winding and unwinding units 20 as an example, if a defect is found in the positive plate material tape when the battery cell is wound, the positive plate material tape only needs to be scrapped by a length of half of the length of the positive plate material tape. Similarly, if the number of the winding and unwinding units is three, only one third of the length of the sheet is scrapped, and so on. Therefore, the technical scheme of the embodiment solves the problem that when the battery cell in the prior art is wound, if the material strap has a defect, the material strap with a whole length needs to be scrapped, so that the material is wasted.

It should be noted that the frame 10 is used for mounting each unwinding unit 20. In this embodiment, the frame 10 is a vertical structure.

Further, each unwinding unit 20 includes a positive electrode sheet unwinding mechanism 21, a negative electrode sheet unwinding mechanism 22, and two separator unwinding mechanisms 23. After the unwinding mechanism unwinds the material belt, a basic unit of 'diaphragm-positive plate-diaphragm-negative plate' is formed. And after the unwinding mechanism unwinds the material belt, the end of the material belt is fixed on the winding mechanism 30. The winding mechanism 30 includes a winding head and a winding needle rotatably disposed on the winding head, and the end of each material tape is fixed to the winding needle. When the winding needle rotates, the winding needles can drive the material belts to be wound into the battery cell.

After each material belt in each unreeling unit 20 is unreeled, the end of each material belt is connected with the winding needle.

Preferably, the number of the unwinding units 20 in this example is two, and when the cell winding is performed, in the two unwinding units 20, two positive electrode material tapes, two negative electrode material tapes, and four diaphragm material tapes are wound together. As described above, if a certain material tape in one unwinding unit 20 is defective, the material tape may be discarded by a length of half a sheet length, thereby reducing material waste.

Meanwhile, because the two basic units (the positive plate-diaphragm-negative plate-diaphragm) are wound simultaneously, the winding speed of the battery cell can be greatly increased, and the production efficiency is improved.

Preferably, in some embodiments, not shown, a greater number (more than two) of unwinding units 20 may be disposed on the frame 10, so as to further reduce the scrap length of the tape when the tape is defective.

In this embodiment, there are two unwinding units 20, and the two unwinding units 20 are respectively located at two sides of the winding mechanism 30. As shown in fig. 1, one unwinding unit 20 is located on the left side of the winding mechanism 30 (above one membrane unwinding mechanism 23 in the unwinding unit 20), and the other unwinding unit 20 is located on the right side of the winding mechanism 30, so as to facilitate the arrangement of the tapes.

As can be seen from fig. 1, the arrangement of the unwinding mechanisms in each unwinding unit 20 is roughly as follows: the positive plate unwinding mechanism 21 and the negative plate unwinding mechanism 22 are arranged oppositely and are arranged at the lower position of the middle part of the frame 10. The two diaphragm unwinding mechanisms 23 are arranged near the upper middle portion of the frame 10, one diaphragm unwinding mechanism 23 is located between the positive plate unwinding mechanism 21 and the negative plate unwinding mechanism 22, and the other diaphragm unwinding mechanism 23 is arranged near the winding mechanism 30.

As can be seen from fig. 1, in the clockwise direction, each tape of the two unreeling units 20 is fixed on the reeling needle by a negative electrode sheet tape-a membrane tape-a positive electrode sheet tape-a membrane tape.

As shown in fig. 1, in the technical solution of this embodiment, the positive electrode tab unwinding mechanism 21 includes a first rotating shaft, the negative electrode tab unwinding mechanism 22 includes a second rotating shaft, and the separator unwinding mechanism 23 includes a third rotating shaft. Specifically, when the cell is wound, the positive electrode material roll is placed on the first rotating shaft, the negative electrode material roll is placed on the second rotating shaft, and the separator material roll is placed on the third rotating shaft.

As shown in fig. 1, in the technical solution of the present embodiment, a first tensioning mechanism 40 is disposed downstream of the positive electrode sheet unwinding mechanism 21. Wherein, first tensioning mechanism 40 includes a plurality of tensioning rollers, and a plurality of tensioning rollers can play the effect of tensioning on the one hand to the positive pole material area, and on the other hand also can play the effect of position direction to the positive pole material area.

As shown in fig. 1, in the technical solution of the present embodiment, a second tensioning mechanism 50 is disposed downstream of the negative electrode sheet unwinding mechanism 22. The second tensioning mechanism 50 includes a plurality of tensioning rollers, which can tension the negative electrode material tape, and can also guide the position of the negative electrode material tape.

As shown in fig. 1, in the solution of the present embodiment, a third tensioning mechanism 60 is disposed downstream of the membrane unwinding mechanism 23. Wherein, third straining device 60 includes a plurality of tensioning rollers, and a plurality of tensioning rollers can play the effect of tensioning on the one hand to the diaphragm material area, and on the other hand also can play the effect of position direction to the diaphragm material area.

Example two

As shown in fig. 2, the cell winding device of the second embodiment is different from the first embodiment in that the unwinding unit 20 further includes a first collecting mechanism 70 and a second collecting mechanism 80.

The first material converging mechanism 70 is arranged at the downstream of the positive plate unwinding mechanism 21 and one of the diaphragm unwinding mechanisms 23, and the first material converging mechanism 70 is suitable for converging materials unwound by the positive plate unwinding mechanism 21 and one of the diaphragm unwinding mechanisms 23. The second material collecting mechanism 80 is arranged downstream of the negative plate unwinding mechanism 22 and the other diaphragm unwinding mechanism 23, and the second material collecting mechanism 80 is adapted to collect materials unwound by the negative plate unwinding mechanism 22 and the other diaphragm unwinding mechanism 23.

Referring to fig. 2, the positive tape and one of the separator tapes are collected by a first collecting mechanism 70 and then attached to the winding pin. The negative material strap and the other diaphragm are collected by the second collecting mechanism 80 and then connected to the winding needle.

Compared with the first embodiment, in the battery cell winding device of the second embodiment, the number of the tape strands connected to the winding needles is reduced (eight strands are changed into four strands), which is beneficial to the arrangement of the tape. Meanwhile, the number of the tension rollers arranged on the frame is reduced, which is beneficial to the miniaturization design of the frame 10.

Preferably, the first gathering mechanism 70 and the second gathering mechanism 80 are both gathering rollers.

The application also provides a battery production line which comprises the battery core winding device.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications derived therefrom are intended to be within the scope of the invention.

Claims

1. A cell winding device, comprising:

a frame (10);

the unwinding units (20) are arranged on the rack (10), and each unwinding unit (20) comprises a positive plate unwinding mechanism (21), a negative plate unwinding mechanism (22) and two diaphragm unwinding mechanisms (23);

the winding mechanism (30) is arranged on the rack (10), and the winding mechanism (30) is suitable for winding the materials unwound by the unwinding units (20) into the battery cells.

2. The cell winding device according to claim 1, wherein there are two unwinding units (20), and the two unwinding units (20) are respectively located at two sides of the winding mechanism (30).

3. The cell winding device according to claim 1 or 2, wherein the positive electrode tab unwinding mechanism (21) comprises a first rotating shaft, the negative electrode tab unwinding mechanism (22) comprises a second rotating shaft, and the separator unwinding mechanism (23) comprises a third rotating shaft.

4. The cell winding device according to claim 1 or 2, wherein a first tensioning mechanism (40) is arranged downstream of the positive electrode sheet unwinding mechanism (21).

5. The cell winding device according to claim 1 or 2, wherein a second tensioning mechanism (50) is arranged downstream of the negative electrode sheet unwinding mechanism (22).

6. The cell winding device according to claim 1 or 2, wherein a third tensioning mechanism (60) is disposed downstream of the membrane unwinding mechanism (23).

7. The cell winding device according to claim 1 or 2, wherein the unwinding unit (20) further comprises a first material collecting mechanism (70), the first material collecting mechanism (70) is disposed downstream of the positive electrode sheet unwinding mechanism (21) and one of the membrane unwinding mechanisms (23), and the first material collecting mechanism (70) is adapted to collect the materials unwound by the positive electrode sheet unwinding mechanism (21) and one of the membrane unwinding mechanisms (23).

8. The cell winding device according to claim 7, wherein the unwinding unit (20) further comprises a second material collecting mechanism (80), the second material collecting mechanism (80) is disposed downstream of the negative electrode sheet unwinding mechanism (22) and the other separator unwinding mechanism (23), and the second material collecting mechanism (80) is adapted to collect materials unwound by the negative electrode sheet unwinding mechanism (22) and the other separator unwinding mechanism (23).

9. The cell winding device according to claim 8, wherein the first collecting mechanism (70) and the second collecting mechanism (80) are collecting rollers.

10. A battery production line comprising the cell winding device according to any one of claims 1 to 9.