CN220984800U

CN220984800U - Battery winding core protection structure, battery and electric equipment

Info

Publication number: CN220984800U
Application number: CN202322444896.XU
Authority: CN
Inventors: 黄婷; 陈圣立; 杜晓淳
Original assignee: Jiangsu Zenergy Battery Technologies Co Ltd
Current assignee: Jiangsu Zenergy Battery Technologies Co Ltd
Priority date: 2023-09-08
Filing date: 2023-09-08
Publication date: 2024-05-17
Anticipated expiration: 2033-09-08

Abstract

The utility model relates to a battery winding core protection structure, a battery and electric equipment, which comprises the following components: the first protection sheet is positioned on the first surface of the uncombined winding core, the first surface is a welding influence area, and the welding influence area is an area where welding slag splashes to the surface of the battery cell in the welding process; wherein, the first protection piece is insulating material. The safety of the battery can be effectively ensured, the foreign matters are prevented from puncturing the winding core, and the short circuit of the battery core is avoided.

Description

Battery winding core protection structure, battery and electric equipment

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery winding core protection structure, a battery and electric equipment.

Background

The lithium battery is composed of a plurality of winding cores, in the production process, one switching piece is needed to be used for welding and fixing the positive lugs and the positive poles of the winding cores, the other switching piece is used for welding and fixing the negative lugs and the negative poles of the winding cores, or the winding cores are combined after the lugs are directly welded and connected with the poles.

However, in the welding process of the above-described tab and post, and tab and post, the following problems easily occur: during the welding process, a large amount of welding slag is generated, and the welding slag can scatter on the surface of the winding core, and after the winding core in the battery is closed, foreign matters such as welding slag can puncture the isolating film on the winding core, so that the battery is short-circuited.

Disclosure of utility model

Therefore, the technical problem to be solved by the utility model is to overcome the technical defect that in the prior art, a large amount of welding slag can be generated in the welding process of the adapter plate and the electrode lug and the electrode post and the welding process of the electrode lug and the electrode post of the battery with multiple winding cores, and the isolating film on the winding cores can be punctured by the foreign matters such as the welding slag, so that the battery is short-circuited.

In order to solve the technical problems, the utility model provides a battery winding core protection structure, which comprises:

The first protection sheet is positioned on the first surface of the uncombined winding core, the first surface is a welding influence area, and the welding influence area is an area where welding slag splashes to the surface of the battery cell in the welding process;

wherein, the first protection piece is insulating material.

In one embodiment of the present utility model, further comprising:

The second protection sheet is positioned on the lower surface of the uncombined winding core;

The first protection sheet is positioned on the upper surface of the uncombined winding core.

In one embodiment of the utility model, the first and second guard sheets are thermoplastic materials having a Rockwell hardness greater than 48.

In one embodiment of the utility model, the first protective sheet is adhered to the upper surface of the winding core by a glue.

In one embodiment of the utility model, the first protective sheet is provided with an extension, and the extension is arranged close to the side surface of the winding core.

In one embodiment of the present utility model, the first protection sheet is provided with extension portions at two sides, and the extension portions at two sides are respectively located at two sides of the winding core.

The utility model discloses a battery, comprising: a plurality of winding cores and the battery winding core protection structure.

In one embodiment of the utility model, two winding cores are symmetrically arranged, the lugs on the two winding cores are oppositely arranged, the outer side wall of each winding core is provided with a connecting sheet, and the connecting sheet, the first protecting sheet and the second protecting sheet are integrally formed.

In one embodiment of the present utility model, further comprising:

The cover body assembly is positioned between the two winding cores which are not closed, and comprises a cover plate and a plastic part, wherein the plastic part is positioned on the upper side of the cover plate;

The electrode column assembly comprises an anode column and a cathode column, and the anode column and the cathode column are arranged on the cover body assembly in a penetrating way;

Wherein the positive lugs of a plurality of the winding cores are welded with the positive pole, the negative lugs (12) of a plurality of the winding cores are welded with the negative pole, or

Still include the switching subassembly, the switching subassembly includes first switching piece and second switching piece, a plurality of the anodal ear of rolling up the core passes through first switching piece and anodal post welding, a plurality of the negative pole ear of rolling up the core passes through second switching piece and anodal post welding.

The utility model discloses electric equipment, which comprises the battery.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

1. According to the utility model, before the winding core is not closed, the winding core is protected through the protection structure, specifically, the first protection sheet is arranged on the first surface of the winding core which is not closed, and the first surface is the area where welding slag splashes to the surface of the battery cell in the welding process, so that the battery cell can be protected.

2. The utility model can effectively ensure the safety of the battery, prevent foreign matters from piercing the isolating film and the insulating adhesive tape at the periphery of the winding core, and avoid the short circuit of the battery core.

3. After the winding cores are combined, the first protection sheets are covered on the connection influence areas of the winding cores, so that when welding slag exists between the adjacent winding cores, the welding slag is located between the two first protection sheets, and the winding cores can be effectively protected.

Drawings

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings.

FIG. 1 is a schematic diagram of a first embodiment;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic diagram of a second embodiment;

fig. 4 is a schematic structural diagram of the third embodiment.

Description of the specification reference numerals: 10. a winding core; 11. a positive electrode tab; 12. a negative electrode ear; 20. a first protective sheet; 21. a second protective sheet; 22. a connecting sheet; 23. an extension; 30. a first tab; 31. a second switching piece; 40. a positive electrode post; 41. a negative electrode column; 50. a cover plate; 60. a plastic part; 61. a first overturning piece; 62. a second overturning piece; 63. a buckle; 64. a clamping groove.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the utility model and practice it.

Referring to fig. 1-4, the utility model discloses a protection structure of a battery winding core 10, which comprises a first protection sheet 20, wherein the first protection sheet 20 is positioned on a first surface of the winding core 10 which is not covered with a core, the first surface is a welding influence area, the welding influence area is an area where welding slag splashes to the surface of the battery core in a welding process, and the first protection sheet 20 is made of an insulating material.

The working principle of the utility model is as follows: because welding slag can be generated in the welding process of the switching sheet and the tab and the pole or the welding process of the tab and the pole before the core is combined with the battery core, after the core is combined with the battery core, the welding slag can easily puncture the isolating film on the battery core, and the battery is short-circuited. Before the winding core 10 is not closed, the winding core 10 is protected by the protection structure, specifically, the first protection sheet 20 is arranged on the first surface of the winding core 10 which is not closed, and the first surface is the area where welding slag splashes to the surface of the battery core in the welding process. In this way, the battery cells can be protected, and thus, after the subsequent battery cells are combined, the first protection sheet 20 can also protect the winding core 10 from welding slag to puncture the winding core 10.

The utility model can effectively ensure the safety of the battery, prevent foreign matters from piercing the isolating film and the insulating adhesive tape at the periphery of the winding core 10, and avoid the short circuit of the battery core. After the winding cores 10 are combined, since the contact area of the winding cores 10 is covered with the first protection sheets 20, when welding slag exists between the adjacent winding cores 10, the welding slag is located between the two first protection sheets 20, so that the winding cores 10 can be effectively protected.

Further, the utility model also comprises a second protection sheet 21, and the second protection sheet 21 is positioned on the lower surface of the uncocked winding core 10. The first protective sheet 20 is located on the upper surface of the unfilled winding core 10. Before the core is not closed, the winding core 10 is horizontally placed, wherein the upper surface and the lower surface of the winding core 10 are large surfaces, and the pole lugs are arranged on the side surface of the winding core 10. Because the upper surface of the core 10 of the core is not closed is provided with the first protection sheet 20, and the lower surface of the core 10 of the core is not closed is provided with the second protection sheet 21, the welding slag can be ensured to fall on the first protection sheet 20 in the tab welding process, and after the subsequent core closing, the first protection sheet 20 and the second protection sheet 21 can be matched to protect the battery core.

The first protective sheet 20 and the second protective sheet 21 are thermoplastic materials having a rockwell hardness greater than 48. Since the first and second protection sheets 20 and 21 have a large hardness, the battery cells can be effectively protected, and foreign matters are not liable to puncture the battery cells.

In order to ensure that the first protective sheet 20 on the winding core 10 is not easily removed, the first protective sheet 20 may be adhered to the upper surface of the winding core 10 by a glue.

Further, the first protection sheet 20 is provided with an extension 23, and the extension 23 is provided in close contact with the side surface of the winding core 10. In this way, the first protection sheet 20 can also protect the side surface of the winding core 10. Referring to fig. 3, the extension 23 of the first protection sheet 20 may extend to the tab side of the winding core 10. In another embodiment, the extending portion 23 may be provided with a through hole, and the tab is penetrated from the through hole, so that the first protection sheet 20 can well protect the winding core 10 during the subsequent welding process of the tab and the switching sheet.

In addition, the first protection sheet 20 may be provided with extension portions 23 on both sides, and the extension portions 23 on both sides may be located on both sides of the winding core 10. In this way, the extensions 23 protect both sides of the winding core 10.

The utility model discloses a battery, which comprises a plurality of winding cores 10 and the protection structure of the battery winding cores 10. The battery is a battery after the winding core 10 is combined, and due to the existence of the protective structure, welding slag foreign matters in the battery exist between the two first protective sheets 20, so that the battery can be effectively protected, and leakage and short circuit are prevented.

The number of winding cores 10 in the battery may be set as desired, such as 2, 4, and 6.

When the winding cores 10 are provided with two winding cores 10, the two winding cores 10 are symmetrically arranged, the pole lugs on the two winding cores 10 are oppositely arranged, the outer side wall of each winding core 10 is provided with a connecting sheet 22, and the connecting sheet 22, the first protection sheet 20 and the second protection sheet 21 are integrally formed. Namely, the utility model can realize the protection and the wrapping of two winding cores 10 through one protection sheet. Because the utility model basically covers the winding core 10 except the four surfaces of the winding core 10 in the opening direction (towards the bottom and the top of the battery cell), the winding number of the isolating film at the periphery of the winding core 10 can be reduced, the working hours of the winding procedure and the use of the isolating film are reduced, and the production cost of the battery cell is reduced.

The utility model also comprises a cover body component and a pole component. The cover body component is positioned between the two core rolls 10 without the cores and comprises a cover plate 50 and a plastic part 60, wherein the plastic part 60 is positioned on the upper side of the cover plate 50; the pole assembly comprises a positive pole 40 and a negative pole 41, and the positive pole 40 and the negative pole 41 are all arranged on the cover assembly in a penetrating way. The positive electrode tab 11 of the plurality of winding cores 10 is welded to the positive electrode post 40, and the negative electrode tab 12 of the plurality of winding cores 10 is welded to the negative electrode post 41.

In another embodiment, the present utility model further comprises a switching assembly, the switching assembly comprises a first switching piece 30 and a second switching piece 31, the positive tabs 11 of the plurality of winding cores 10 are welded with the positive electrode post 40 through the first switching piece 30, and the negative tabs 12 of the plurality of winding cores 10 are welded with the positive electrode post 40 through the second switching piece 31.

In another embodiment, the plastic part 60 includes a main body, and a first folding end and a second folding end located at two sides of the main body, wherein the first folding end is folded relative to the main body to be pressed on the first folding piece 30, and the second folding end is folded relative to the main body to be pressed on the second folding piece 31. Because the first turnover end and the second turnover end exist, the first turnover piece 30 and the second turnover piece 31 can be protected, when the first turnover end is pressed on the first turnover piece 30, the second turnover end is pressed on the second turnover piece 31, when the two winding cores 10 are combined, the tab sides of the winding cores 10 are pressed on the first turnover end and the second turnover end, and therefore, the first turnover end and the second turnover end realize insulation between the battery core and the turnover piece.

Further, a clamping groove 64 is formed in the main body, a buckle 63 is arranged on each of the first overturning end and the second overturning end, and the buckle 63 is matched with the clamping groove 64. The main body is provided with a buckle 63, the first overturning end and the second overturning end are provided with a clamping groove 64, and the buckle 63 and the clamping groove 64 are matched. Through buckle 63 structure, can guarantee that first upset end and second upset end are fixed with the main part.

The assembly and welding method of the utility model is as follows:

A cover body assembly is obtained, and a protective sheet is laid on the cover body assembly, wherein the protective sheet is of an integrally formed structure of a first protective sheet 20, a connecting sheet 22 and a second protective sheet 21;

Two winding cores 10 are placed on the protective sheet, wherein the two winding cores 10 are horizontally placed, the upper surface and the lower surface of each winding core 10 are large surfaces of the battery cell, one side of each winding core 10 with a tab faces to a cover body on the cover body assembly, and a switching sheet is placed between the two winding cores 10;

Both ends of the protective sheet are turned upward and wound up so that the protective sheet covers the upper surface of the winding core 10;

One end of the switching sheet is welded with the electrode lug, and the other end of the switching sheet is welded with the electrode post;

After the welding is completed, the battery of the double winding core 10 is assembled.

When the battery core is of a double-winding core 10 structure, the purpose that the protective sheet can cover two large surfaces of the winding core 10 can be achieved by extending the protective sheet, and the tail end of the extending part of the protective sheet is attached to the winding core 10 through an adhesive substance before the transfer sheet laser welding process; or a reverse buckle structure is arranged at the tail end of the extension part of the protective sheet, so that the protective sheet can be lapped on the winding core 10.

Referring to fig. 4, when the battery core is of a multi-winding core 10 structure, the first protection sheet 20 can be designed as an independent insulation protection sheet made of thermoplastic materials, the first protection sheet 20 has a plurality of first protection sheets 20 and winding cores 10, the area of the first protection sheet 20 needs to be larger than the large area of the winding cores 10, and the first protection sheet 20 is attached to the surface of the winding cores 10 before the winding cores 10 are combined. After the winding core 10 is closed, the protective structure reduces the risk of the winding core 10 being pierced by foreign objects.

The utility model discloses electric equipment, which comprises the battery. The main design key point of the utility model is the structural improvement of the battery, and other structures of the electric equipment, such as the electric connection part and the mechanical structure part of the electric equipment are not described in detail. The electric device may be various electric devices such as an automobile, a cellular phone, a computer, a ship, a spacecraft, an electric toy, and an electric tool. The embodiment of the utility model does not limit the electric equipment in particular.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present utility model will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. A battery core protective structure, comprising:

The first protection sheet (20) is positioned on the first surface of the uncombined winding core (10), the first surface is a welding influence area, and the welding influence area is an area where welding slag splashes to the surface of the battery cell in the welding process;

wherein the first protective sheet (20) is an insulating material.

2. The battery core guard structure of claim 1, further comprising:

A second protective sheet (21), wherein the second protective sheet (21) is positioned on the lower surface of the uncocked winding core (10);

the first protection sheet (20) is positioned on the upper surface of the uncombined winding core (10).

3. The battery core protection structure according to claim 2, wherein the first protection sheet (20) and the second protection sheet (21) are thermoplastic materials having a rockwell hardness greater than 48.

4. The battery core protection structure according to claim 1, wherein the first protection sheet (20) is adhered to the upper surface of the core (10) by a gel.

5. The battery winding core protection structure according to claim 1, wherein an extension (23) is provided on the first protection sheet (20), and the extension (23) is disposed close to a side surface of the winding core (10).

6. The battery winding core protection structure according to claim 5, wherein the first protection sheet (20) is provided with extension portions (23) on both sides, and the extension portions (23) on both sides are located on both sides of the winding core (10), respectively.

7. A battery, comprising: a plurality of winding cores (10) and a battery winding core protection structure according to any one of claims 1-6.

8. The battery according to claim 7, wherein the winding cores (10) are provided with two winding cores (10) symmetrically, the tabs on the two winding cores (10) are arranged oppositely, the outer side wall of each winding core (10) is provided with a connecting sheet (22), and the connecting sheet (22) is integrally formed with the first protection sheet (20) and the second protection sheet (21).

9. The battery of claim 7, further comprising:

The cover body assembly is positioned between the two core (10) without the core, and comprises a cover plate (50) and a plastic part (60), wherein the plastic part (60) is positioned on the upper side of the cover plate (50);

The electrode column assembly comprises an anode column (40) and a cathode column (41), and the anode column (40) and the cathode column (41) are arranged on the cover body assembly in a penetrating way;

Wherein the positive electrode lugs (11) of the plurality of winding cores (10) are welded with the positive electrode column (40), the negative electrode lugs (12) of the plurality of winding cores (10) are welded with the negative electrode column (41), or

The battery pack further comprises a switching assembly, the switching assembly comprises a first switching piece (30) and a second switching piece (31), a plurality of positive lugs (11) of the winding cores (10) are welded with the positive pole (40) through the first switching piece (30), and a plurality of negative lugs (12) of the winding cores (10) are welded with the positive pole (40) through the second switching piece (31).

10. A powered device comprising a battery as claimed in any one of claims 7-9.