CN218783201U

CN218783201U - Battery cell tab switching structure

Info

Publication number: CN218783201U
Application number: CN202223336228.7U
Authority: CN
Inventors: 喻俊杰; 洪春林; 纪荣进; 李聪; 王诗龙
Original assignee: Huizhou Liwinon Energy Technology Co Ltd
Current assignee: Huizhou Liwinon Energy Technology Co Ltd
Priority date: 2022-12-13
Filing date: 2022-12-13
Publication date: 2023-03-31
Anticipated expiration: 2032-12-13

Abstract

The utility model discloses an electricity core utmost point ear switching structure, including core, utmost point ear crowd, strap utmost point ear and sticky tape, strap utmost point ear has first contact zone and second contact zone, and the core is connected to utmost point ear crowd one end, and first contact zone and second contact zone all are connected with the other end of utmost point ear crowd, and utmost point ear crowd and strap utmost point ear are connected to the sticky tape. Through the cooperation setting of core, utmost point ear crowd, strap utmost point ear and sticky tape, be equipped with first contact zone and second contact zone on the strap utmost point ear to first contact zone is connected with the both sides of utmost point ear crowd respectively with the second contact zone, so, has not only ensured to have sufficient welding area between strap utmost point ear and the utmost point ear crowd, but also has reduced welded width L, more is favorable to promoting the energy density of electric core.

Description

Electricity core utmost point ear switching structure

Technical Field

The utility model relates to a battery technology field specifically, relates to an electricity core utmost point ear switching structure.

Background

The lithium battery is a new generation energy which is popular and widely used in recent years, has the advantages of high voltage, high energy density, long cycle life and the like, and along with the increase of the use frequency, the public has more and more great demand for the lithium battery, and the rapid development of the battery industry is promoted.

As shown in fig. 1 to 3, fig. 1 is a front view of a conventional battery cell; fig. 2 is a side view of a conventional battery cell; fig. 3 is a cross-sectional view of a conventional multi-tab cell. The multi-tab structure is one of common battery cell structures, and is favorable for reducing internal resistance and improving discharge rate, thereby greatly improving the multi-aspect performance of the lithium battery. In order to facilitate packaging and use, multiple tabs need to be led out. The battery cell comprises a core body 10, a tab group 20 and a metal strip tab 30, wherein the tab group 20 is led out from the core body 10, one end of the metal strip tab 30 is welded with the tab group 20, and the other end of the metal strip tab 30 is led out from the outside. In order to meet the comprehensive requirements of the battery cell, the welding effect needs to be ensured, which also means that the welding width L cannot be too narrow, and for some current battery cells with thinner thickness, after welding according to the existing welding width L, the thickness of the battery cell can be increased, which can result in the reduction of the energy density of the battery.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model provides an electricity core utmost point ear switching structure.

The utility model discloses an electricity core utmost point ear switching structure, include: the metal strap lug is provided with a first contact area and a second contact area, one end of the lug group is connected with the core body, the first contact area and the second contact area are both connected with the other end of the lug group, and the adhesive tape is connected with the lug group and the metal strap lug.

According to an embodiment of the present invention, the first contact area and the second contact area are located on the same side of the metal band tab.

According to the utility model discloses an embodiment, utmost point ear crowd has first side and second side, and first contact zone is connected with first side, and the second side is connected to the second contact zone.

According to the utility model discloses an embodiment, the sticky tape includes first colloid, and one of the upper surface or the lower surface of utmost point ear crowd and strap utmost point ear is located in the subsides of first colloid.

According to an embodiment of the present invention, the adhesive tape further includes a second adhesive body attached to the other of the upper surface and the lower surface of the tab group and the metal band tab.

According to an embodiment of the present invention, the first contact area is welded to the tab group.

According to the utility model discloses an embodiment, first contact zone adopts conductive silver thick liquid to be connected with utmost point ear crowd.

According to the utility model discloses an embodiment, the second contact zone welds with utmost point ear crowd.

According to an embodiment of the present invention, the second contact area is connected to the tab group by conductive silver paste.

The beneficial effects of the utility model reside in that, through the cooperation setting of core, utmost point ear crowd, strap utmost point ear and sticky tape, be equipped with first contact zone and second contact zone on the strap utmost point ear to first contact zone is connected with the both sides of utmost point ear crowd respectively with the second contact zone, so, has not only ensured to have sufficient welding area between strap utmost point ear and the utmost point ear crowd, but also has reduced welded width L, more is favorable to promoting the energy density of electric core.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a front view of a conventional battery cell;

fig. 2 is a side view of a conventional battery cell;

fig. 3 is a cross-sectional view of a conventional multi-tab cell;

fig. 4 is a cross-sectional view of a battery cell in this embodiment.

Description of reference numerals:

10-a core;

20-tab group; 201-a first side; 202-a second side;

30-metal band tab; 301-first contact zone; 302-a second contact zone;

40-adhesive tape; 401-a first colloid; 402-second colloid.

Detailed Description

In the following description, numerous implementation details are set forth in order to provide a more thorough understanding of the present invention. It should be understood, however, that these implementation details should not be used to limit the invention. That is, in some embodiments of the invention, such practical details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for description purposes, not specifically referring to the order or sequence, and are not intended to limit the present invention, but only to distinguish the components or operations described in the same technical terms, and are not to be construed as indicating or implying any relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

As shown in fig. 4, fig. 4 is a cross-sectional view of a battery cell in this embodiment. The application discloses electricity core utmost point ear switching structure includes core 10, utmost point ear crowd 20, strap utmost point ear 30 and sticky tape 40, and core 10 is connected to the one end of utmost point ear crowd 20, and strap utmost point ear 30 is connected to the other end of utmost point ear crowd 20, still is connected with sticky tape 40 between strap utmost point ear 30 and the utmost point ear crowd 20.

In a specific application, the tab group 20 has a first side surface 201 and a second side surface 202 at an end portion away from the core 10, the first side surface 201 and the second side surface 202 are both disposed opposite to the metal strip tab 30, and the first side surface 201 and the second side surface 202 are both connected to the metal strip tab 30.

Furthermore, the metal strap tab 30 has a first contact zone 301, the first contact zone 301 being arranged opposite the first side 201, and the first contact zone 301 being connected to the first side 201, in the energized state, an electrical current being able to flow between the first contact zone 301 and the first side 201. In a specific application, the first contact region 301 and the first side surface 201 are connected by a soldering technique, or a conductive silver paste is coated between the first contact region 301 and the first side surface 201, so that the first contact region 301 and the first side surface 201 are connected. In particular, the first contact area 301 is connected to the first side 201 by a welding technique.

Furthermore, the metal strap tab 30 has a second contact zone 302, the second contact zone 302 being arranged opposite the second lateral surface 202, and the second contact zone 302 being connected to the second lateral surface 202, it being possible for an electrical current to flow between the second contact zone 302 and the second lateral surface 202 in the energized state. In a specific application, the second contact area 302 and the second side 202 are connected by using a soldering technique, or a conductive silver paste is coated between the second contact area 302 and the second side 202, so that the two are connected. In this embodiment, the second contact area 302 and the second side 202 are connected by a welding technique. It should be noted that the connection manner of the second bonding region and the second side surface 202 may be different from the connection manner of the first bonding region and the first side surface 201, that is, the first bonding region and the first side surface 201 are connected by using a welding technique, and the second bonding region and the second side surface 202 may be connected by using a conductive silver paste; or, the first bonding region is connected to the first side surface 201 through conductive silver paste, and the second bonding region is connected to the second side surface 202 by soldering.

Further, the first attaching area and the second attaching area are located on the same side of the metal strip tab 30, and when in use, the metal strip tab 30 is folded around the end of the tab group 20, so as to form a first contact area 301 facing the first side surface 201 and a second contact area 302 facing the second side surface 202.

The adhesive tape 40 includes a first adhesive body 401, wherein the first adhesive body 401 is attached to the upper surfaces of the tab group 20 and the metal tape tab 30. In another embodiment, the first colloid 401 may also be attached to the lower surfaces of the tab group 20 and the metal strip tab 30. Further, the adhesive tape 40 further includes a second adhesive body 402, wherein the second adhesive body 402 and the first adhesive body 401 are respectively attached to different sides of the tab group 20 and the metal strip tab 30, that is, when the first adhesive body 401 is attached to the upper surface, the second adhesive body 402 is attached to the lower surfaces of the tab group 20 and the metal strip tab 30. When the first gel 401 is attached to the lower surface, the second gel 402 is attached to the upper surfaces of the tab group 20 and the metal tape tab 30. Further, the first colloid 401 and the second colloid 402 may be used simultaneously or separately, and are not limited herein.

In summary, through the matching arrangement of the core 10, the tab group 20, the metal strip tab 30 and the adhesive tape 40, the metal strip tab 30 is provided with the first contact region 301 and the second contact region 302, and the first contact region 301 and the second contact region 302 are respectively connected with two sides of the tab group 20, so that not only is a sufficient welding area ensured to be provided between the metal strip tab 30 and the tab group 20, but also the welding width L is reduced, which is more beneficial to improving the energy density of the battery cell.

The above description is only for the embodiment of the present invention, and is not intended to limit the present invention. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The utility model provides a battery core utmost point ear switching structure which characterized in that includes: core (10), utmost point ear crowd (20), strap utmost point ear (30) and sticky tape (40), strap utmost point ear (30) have first contact zone (301) and second contact zone (302), utmost point ear crowd (20) one end is connected core (10), first contact zone (301) reach second contact zone (302) all with the other end of utmost point ear crowd (20) is connected, sticky tape (40) are connected utmost point ear crowd (20) and strap utmost point ear (30).

2. The cell tab transition structure according to claim 1, characterized in that the first contact region (301) and the second contact region (302) are located on the same side of the metal strip tab (30).

3. The cell tab transfer structure of claim 2, wherein the tab group (20) has a first side surface (201) and a second side surface (202), the first contact region (301) is connected to the first side surface (201), and the second contact region (302) is connected to the second side surface (202).

4. The cell tab adapting structure according to claim 1, wherein the adhesive tape (40) comprises a first adhesive body (401), and the first adhesive body (401) is attached to one of the upper surface or the lower surface of the tab group (20) and the metal strip tab (30).

5. The cell tab adapting structure according to claim 4, wherein the adhesive tape (40) further comprises a second adhesive body (402), and the second adhesive body (402) is attached to the tab group (20) and the other of the upper surface and the lower surface of the metal tape tab (30).

6. The cell tab transition structure according to any one of claims 1 to 5, wherein the first contact region (301) is welded to the tab group (20).

7. The cell tab transfer structure according to any one of claims 1 to 5, wherein the first contact region (301) and the tab group (20) are connected by conductive silver paste.

8. The cell tab adaptor structure according to any one of claims 1 to 5, wherein the second contact region (302) is welded to the tab group (20).

9. The cell tab transfer structure of any one of claims 1 to 5, wherein the second contact region (302) is connected to the tab group (20) by a conductive silver paste.