CN219321419U

CN219321419U - Battery cell winding needle and battery cell winding machine

Info

Publication number: CN219321419U
Application number: CN202223289981.5U
Authority: CN
Inventors: 张树翰; 魏建良; 罗飞
Original assignee: Jiangsu Zenergy Battery Technologies Co Ltd
Current assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-07-07
Anticipated expiration: 2032-12-08

Abstract

The utility model relates to the field of battery manufacturing equipment, and discloses a battery core winding needle and a battery core winding machine. According to the battery core winding needle and the battery core winding machine, the bare battery core wound on the winding shaft is heated through the first heating device, so that the temperature of the bare battery core is increased, the bare battery core can be moved into the hot pressing device for hot pressing after being heated, the heating time of the bare battery core in the hot pressing device is effectively reduced, and the processing efficiency of a battery is improved.

Description

Battery cell winding needle and battery cell winding machine

Technical Field

The utility model relates to the field of battery manufacturing equipment, in particular to a battery core winding needle and a battery core winding machine.

Background

At present, the lithium ion battery is widely applied to the fields of mobile phones, tablet personal computers, wearable equipment, mobile power supplies, electronic cigarettes, various digital products, electric tools, power, energy storage and the like, and has wide market application and great potential. With the increasing wide application of lithium ion batteries, the battery capacity is increased, and the safety requirement of people on the ion batteries is also increased, so that the improvement of the safety of the ion batteries is an urgent and common requirement. In order to improve the safety of the lithium ion battery, the battery winding needle is used for winding the electrode plate and the diaphragm material into a battery cell with a specific size.

After the bare cell is wound and formed, the bare cell is required to be shaped, and the shaping mode is that the bare cell is pre-pressed and micro-shaped firstly, and then the shaping is completed after hot pressing for a period of time. In the prior art, in order to improve the hot-pressing quality of the bare cell, after the bare cell is wound, the bare cell is required to be heated so as to improve the hot-pressing quality of the bare cell.

The prior art is to the heating method of naked electric core, is after accomplishing naked electric core and winds, puts into hot press unit with naked electric core, heats the top surface and the bottom surface of electric core through upper and lower hot pressing board, and this kind of heating method leads to naked electric core inside temperature lower easily, and naked electric core inside temperature is too low and will lead to naked electric core's core bonding infirm, leads to the plastic effect of core relatively poor. In addition, the heating time is additionally increased in the mode of heating the bare cell, so that the production efficiency of the battery is not improved.

In view of this, it is necessary to design a battery cell winding needle and a battery cell winding machine to improve the production efficiency of the battery.

Disclosure of Invention

The utility model aims to provide a battery core winding needle and a battery core winding machine, which are used for improving the production efficiency of a battery.

To achieve the purpose, the utility model adopts the following technical scheme:

the battery core winding needle comprises a winding shaft for winding a winding core belt body to form a bare battery core, and a first heating device for heating the bare battery core on the winding shaft is arranged on the winding shaft.

Optionally, the winding shaft comprises a first winding half shaft and a second winding half shaft, and a tightening module for driving the first winding half shaft and the second winding half shaft to be mutually attached so as to clamp one end of the winding core belt body.

Optionally, the first winding half shaft includes a first clamping pin, and the second winding half shaft includes a second clamping pin for clamping the winding core band body in cooperation with the first clamping pin.

Optionally, the first winding half shaft further comprises a first winding core sleeve and a second winding core sleeve, the first clamping needle is installed on the first winding core sleeve, and the second clamping needle is installed on the second winding core sleeve;

the first heating device comprises a first heating component arranged in the first winding core sleeve and a heating component arranged in the second winding core sleeve.

Optionally, the first heating device includes a first electromagnetic heating sleeve and a second electromagnetic heating sleeve, the first electromagnetic heating sleeve is arranged on the first winding half shaft, and the second electromagnetic heating sleeve is arranged on the second winding half shaft.

Optionally, the battery core winding needle further comprises a mounting seat, and the first winding half shaft and the second winding half shaft are both mounted on the mounting seat;

the tightening module is arranged in the mounting seat, and the battery core winding needle further comprises a driving device for driving the tightening module; when the driving device drives the tightening module, the tightening module drives the first winding half shaft and the second winding half shaft to approach or depart from each other in opposite directions.

Optionally, the first heating device is built in the winding shaft.

Optionally, the first heating device is used for heating the bare cell to a set temperature, and the value range of the set temperature is 50-80 ℃.

A cell winding machine comprising a cell winding needle as claimed in any one of the preceding claims.

Optionally, the electric core winding machine further comprises a heating roller arranged at the upstream of the electric core winding needle to heat the winding core belt body, the heating roller comprises a fixed shaft and a rotary shaft sleeve rotatably sleeved on the fixed shaft, and a second heating device for heating the rotary shaft sleeve is further arranged on the fixed shaft.

Compared with the prior art, the utility model has the following beneficial effects:

in this embodiment, heat the naked electric core of establishing on the winding axle through first heating device to promote the temperature of naked electric core, naked electric core heating can move to hot press device in after accomplishing and carry out hot pressing, has effectively reduced the heating time of naked electric core in hot press device, thereby is favorable to promoting the machining efficiency of battery.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and are therefore not intended to limit the scope of the utility model, since any modification, variation in proportions, or adjustment of the size, which would otherwise be used by those skilled in the art, would not have the essential significance of the present disclosure, would still fall within the scope of the present disclosure without affecting the efficacy or achievement of the present disclosure.

Fig. 1 is a schematic perspective view of a battery core winding needle according to an embodiment of the present utility model;

fig. 2 is a schematic front view of a battery core winding needle according to an embodiment of the present utility model;

fig. 3 is a schematic perspective view of a first heating device hidden in an embodiment of the present utility model;

FIG. 4 is a schematic front view of an embodiment of the present utility model with a first heating device hidden;

FIG. 5 is a schematic top view of a first heating device according to an embodiment of the present utility model;

fig. 6 is a schematic diagram of an installation structure of a heating roller according to an embodiment of the present utility model.

Illustration of: 1. a winding shaft; 101. a tightening module; 11. a first winding half shaft; 111. a first clip needle; 112. a first winding core sleeve; 121. a second clip needle; 122. a second winding core sleeve; 12. a second winding half shaft; 2. a first heating device; 21. a first electromagnetic heating jacket; 22. the second electromagnetic heating sleeve; 3. a mounting base; 4. a heating roller; 41. a fixed shaft; 42. rotating the shaft sleeve; 5. and a second heating device.

Detailed Description

In order to make the objects, features and advantages of the present utility model more comprehensible, the technical solutions in the embodiments of the present utility model are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements 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 utility model. It is noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

Example 1

The embodiment of the utility model provides a battery core winding needle which can be beneficial to reducing the hot-pressing quality of a bare battery core in a hot-pressing device and improving the production efficiency of a battery.

Referring to fig. 1 to 6, the battery cell winding needle includes a winding shaft 1 for winding a winding core tape body to form a bare cell, and a first heating device 2 for heating the bare cell on the winding shaft 1 is disposed on the winding shaft 1.

The first heating device 2 may be an electromagnetic heating device, and after the bare cell is wound, the electromagnetic heating device may work for a set time to heat the current collector in the bare cell, so that the overall temperature of the bare cell rises to between 50 and 80 ℃, and then the bare cell may be put into a hot pressing device for hot pressing. The bare cell does not need to be heated in the hot pressing device again, so that the heating time of the bare cell in the hot pressing device can be effectively reduced, and the production efficiency of the battery is improved. It should be noted that the first heating device 2 may heat the bare cell during the winding process, so as to save heating time. However, the heating by the electromagnetic heating device generally requires only 10-15 seconds to complete the processing, so that the bare cell can be heated after the winding is completed.

In addition, the first heating device 2 can also be a heating mechanism arranged on a winding shaft, the winding shaft can be heated by the heating mechanism in the winding process of the bare cell, heat is transferred to the bare cell through the winding shaft to heat the bare cell, the core of the bare cell is heated at the moment, and the heating speed is higher, so that the heating time of the bare cell in the hot pressing device can be effectively reduced, and the production efficiency of a battery can be improved. After the winding of the bare cell is finished, the bare cell should be put into the hot pressing device as soon as possible, so that the situation that the internal heat of the bare cell is dissipated too much to be heated again is avoided, the residence time of the bare cell in the hot pressing device can be effectively reduced, and the production efficiency is improved.

It should be noted that, the first heating device 2 may be a device that directly heats the bare cell, or may be a device that indirectly heats the bare cell, so long as it can effectively heat the bare cell to reduce the heating time of the bare cell in the hot pressing device.

In this embodiment, the first heating device 2 is configured to heat the bare cell to a set temperature, where the set temperature ranges from 50 ℃ to 80 ℃ to ensure that the temperature of the bare cell is kept within a suitable range. In addition, the specific temperature range can be specifically set according to bare cells with different specifications.

Optionally, the winding shaft 1 comprises a first winding half-shaft 11 and a second winding half-shaft 12, and a tightening module 101 driving the first winding half-shaft 11 and the second winding half-shaft 12 against each other to clamp one end of the winding core band.

At the beginning of winding the bare cell, the winding core tape body needs to be clamped between the first winding half shaft 11 and the second winding half shaft. The winding core belt body comprises pole pieces and a diaphragm which are arranged in a stacked mode. The electrode sheet may include a positive electrode sheet and a negative electrode sheet, and the separator is used for insulating and separating the positive electrode sheet and the negative electrode sheet.

Optionally, the first winding half-shaft 11 comprises a first clamping pin 111 and the second winding half-shaft 12 comprises a second clamping pin 121 for clamping the core band in cooperation with the first clamping pin 111. The first clamping pin 111 and the second clamping pin 121 are moved toward each other to clamp the core band under the driving of the tightening module 101. Here, the tightening module 101 is driven by a driving device, not shown, so that the first clamping pin 111 and the second clamping pin 112 can be brought close to each other to clamp the core band. It should be noted that the tightening module 101 is further configured to support the first clamp needle 111 and the second clamp needle 112, so that the first clamp needle 111 and the second clamp needle 112 are kept parallel to each other.

Optionally, the first winding half shaft 11 further includes a first winding core sleeve 112 and a second winding core sleeve 122, the first clamping pin 111 is mounted on the first winding core sleeve 112, and the second clamping pin 121 is mounted on the second winding core sleeve 122.

The first heating device 2 comprises a first heating element built into the first core sleeve 112 and a heating element built into the second core sleeve 122. It should be noted that the heating element may be a heating wire or other type of heating element. Preferably, the heating wires are uniformly distributed to uniformly heat the first and second winding

core sleeves

112 and 122, so as to achieve the effect of uniformly heating the bare cells.

In a specific embodiment, the first heating device 2 includes a first electromagnetic heating sleeve 21 and a second electromagnetic heating sleeve 22, the first electromagnetic heating sleeve 21 is sleeved on the first winding half shaft 11, and the second electromagnetic heating sleeve 22 is sleeved on the second winding half shaft 12. The bare cell was wound around the winding shaft 1 where the first heating device 2 was not provided.

Specifically, the first electromagnetic heating sleeve 21 and the second electromagnetic heating sleeve 22 heat the bare cell in an electromagnetic heating mode, so that the current collector in the bare cell generates heat, and the internal temperature of the bare cell is more uniform.

Optionally, the battery cell winding needle further comprises a mounting seat 3, and the first winding half shaft 11 and the second winding half shaft 12 are both mounted on the mounting seat 3; the tightening module 101 is mounted in the mount 3. The mounting seat 3 plays a role of supporting the winding shaft 1 while providing a mounting space for mounting the tightening module 101. The tightening module 101 is arranged in the mounting seat 3, and the battery cell winding needle further comprises a driving device for driving the tightening module 101; when the driving device drives the tightening module 101, the tightening module 101 drives the first winding half shaft 11 and the second winding half shaft 12 to approach each other or to depart from each other in opposite directions, so as to clamp or loosen one end of the unwinding core.

In another specific embodiment, the winding shaft 1 has a cylindrical shape, and the first heating device 2 is built in the winding shaft 1.

Example two

The embodiment discloses a battery core winding machine, which comprises a battery core winding needle as in the first embodiment. The battery cell winding needle is a part of a battery cell winding machine, and the battery cell winding machine further comprises necessary components such as a motor for driving the battery cell winding needle to rotate.

Optionally, the cell winding machine further includes a heating roller 4 disposed upstream of the cell winding needle to heat the winding core belt, the heating roller 4 includes a fixed shaft 41 and a rotating shaft sleeve 42 rotatably sleeved on the fixed shaft 41, and the fixed shaft 41 is further provided with a second heating device 5 for heating the rotating shaft sleeve 42.

The heating roller 4 heats the core band, which can make the temperature of the core band wound on the winding shaft 1 higher, which is beneficial to reduce the heating time of the first heating device 2, thereby improving the heating efficiency.

Optionally, can be provided with the pre-compaction device that is used for hot pressing the epaxial naked electric core of coiling on electric core winder, like this after naked electric core coiling is accomplished, heat naked electric core to hot pressing temperature through first heating device 2, then pre-compaction device carries out hot pressing to naked electric core, need not to shift naked electric core like this and can accomplish the hot pressing to naked electric core, can effectively reduce naked electric core blanking time, promotes production efficiency.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. The battery cell winding needle is characterized by comprising a winding shaft (1) for winding a winding core belt body to form a bare battery cell, wherein a first heating device (2) for heating the bare battery cell on the winding shaft (1) is arranged on the winding shaft (1);

the winding shaft (1) comprises a first winding half shaft (11) and a second winding half shaft (12), and a tightening module (101) for driving the first winding half shaft (11) and the second winding half shaft (12) to be mutually attached to clamp one end of the winding core belt body.

2. The cell winding needle according to claim 1, characterized in that the first winding half-shaft (11) comprises a first clamping needle (111) and the second winding half-shaft (12) comprises a second clamping needle (121) for clamping one end of the winding tape body in cooperation with the first clamping needle (111).

3. The cell winding needle according to claim 2, wherein the first winding half-shaft (11) further comprises a first winding core sleeve (112) and a second winding core sleeve (122), the first winding core sleeve (112) being mounted on the first clamping needle (111), the second winding core sleeve (122) being mounted on the second clamping needle (121);

the first heating device (2) comprises a first heating component built in the first winding core sleeve (112) and a heating component built in the second winding core sleeve (122).

4. The cell winding needle according to claim 1, characterized in that the first heating device (2) comprises a first electromagnetic heating sleeve (21) and a second electromagnetic heating sleeve (22), the first electromagnetic heating sleeve (21) being arranged on the first winding half shaft (11), the second electromagnetic heating sleeve (22) being arranged on the second winding half shaft (12).

5. The cell winding needle according to claim 1, further comprising a mounting seat (3), the first winding half-shaft (11) and the second winding half-shaft (12) being mounted on the mounting seat (3);

the tightening module (101) is arranged in the mounting seat (3), and the battery cell winding needle further comprises a driving device for driving the tightening module (101); when the driving device drives the tightening module (101), the tightening module (101) drives the first winding half shaft (11) and the second winding half shaft (12) to approach or depart from each other.

6. The cell winding needle according to claim 1, characterized in that the first heating device (2) is built into the winding shaft (1).

7. The battery cell winding needle according to claim 1, wherein the first heating device (2) is used for heating the bare cell to a set temperature, and the set temperature has a value range of 50-80 ℃.

8. A cell winding machine comprising a cell winding needle according to any one of claims 1 to 7.

9. The cell winding machine according to claim 8, further comprising a heating roller (4) disposed upstream of the cell winding needle to heat the winding core ribbon, the heating roller (4) comprising a fixed shaft (41) and a rotating sleeve (42) rotatably sleeved on the fixed shaft (41), the fixed shaft (41) further being mounted with a second heating device (5) for heating the rotating sleeve (42).