CN211088382U

CN211088382U - Integrated tab structure and lithium ion battery

Info

Publication number: CN211088382U
Application number: CN201922249700.5U
Authority: CN
Inventors: 吕黠物
Original assignee: Dongguan Weike Battery Co ltd
Current assignee: Dongguan Weike Battery Co ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-07-24
Anticipated expiration: 2029-12-16

Abstract

The utility model belongs to the technical field of lithium ion battery, especially, relate to an integrated form utmost point ear structure, including utmost point ear body and cladding in sealed glue on utmost point ear body surface, utmost point ear body includes anodal ear area, negative pole ear area, insulating cement, anodal ear lead wire and negative pole ear lead wire, anodal ear area with negative pole ear area sets up side by side and passes through the insulating cement is connected, anodal ear lead wire with anodal ear area is connected, negative pole ear lead wire with the negative pole ear area is connected, anodal ear lead wire with the setting is separated to negative pole ear lead wire. Additionally, the utility model also provides a lithium ion battery who adopts this utmost point ear structure. Compared with the prior art, the utility model discloses practice thrift the occupation space of utmost point ear, can prevent the short circuit that anodal ear, negative pole ear direct contact lead to effectively, provide good support for the configuration optimization and the arrangement of consumer.

Description

Integrated tab structure and lithium ion battery

Technical Field

The utility model belongs to the technical field of lithium ion battery, especially, relate to an integrated form utmost point ear structure and lithium ion battery.

Background

Along with the development and the popularization of intelligent wearing equipment such as electron cigarette, intelligent earphone, intelligent bracelet, more and more equipment develop to the miniaturization. The size reduction of the electric equipment inevitably requires the size reduction of the battery cell.

At present, batteries adopted by most small-sized electric equipment are small soft packages or button batteries, and as is well known, the soft packages comprise positive lugs and negative lugs and are communicated with external electric equipment through the lugs, so that the requirements of electric quantity input and output are met. But as batteries become smaller and smaller, they have the following problems:

1) the distance between the two lugs is closer, the difficulty of the manufacturing process is increased, and in the manufacturing and transporting processes, the contact short circuit of the positive pole and the negative pole is easy to occur, so that the failure of the battery is caused, and even the safety risk is generated.

2) Because the tabs used by the soft package battery all contain the sealant, in order to prevent the sealant of the two tabs from overlapping, the shoulder width of the tab glue is also made narrower, which is a challenge for tab manufacturers, and the risk of tab short circuit caused by packaging is also increased sharply along with the reduction of the shoulder width of the tab glue.

3) In order to use the tabs on small batteries, only narrower tabs can be used, which means that the size of the ultrasonic welding head is smaller and smaller to achieve the expected effect, and the precision requirement is higher and higher, which is a great challenge for equipment manufacturers.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the utility model lies in: aiming at the defects of the prior art, the integrated tab structure is provided, the occupied space of the tab is saved, and the short circuit caused by the direct contact of the positive tab and the negative tab can be effectively prevented.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an integrated form utmost point ear structure, include utmost point ear body and cladding in sealed glue on utmost point ear body surface, utmost point ear body includes anodal ear area, negative pole ear area, insulating cement, anodal ear lead wire and negative pole ear lead wire, anodal ear area with the negative pole ear area sets up side by side and passes through the insulating cement is connected, anodal ear lead wire with anodal ear area is connected, negative pole ear lead wire with the negative pole ear area is connected, anodal ear lead wire with the setting is separated to negative pole ear lead wire.

As an integrated form utmost point ear structure an preferred scheme, anodal ear area with negative pole ear band-pass hot fusion or crimping with the insulated glue is connected.

As an integrated form utmost point ear structure an preferred scheme, anodal ear lead wire with anodal ear area is the integrated into one piece structure.

As an integrated form utmost point ear structure an preferred scheme, anodal ear lead wire with anodal ear area welding.

As an optimal solution of integrated form utmost point ear structure, negative pole ear lead wire with negative pole ear area be integrated into one piece structure.

As an optimal solution of integrated form utmost point ear structure, negative pole ear lead wire with the welding of negative pole ear area.

As an optimal solution of integrated form utmost point ear structure, anodal ear lead wire with centre-to-centre spacing between the negative pole ear lead wire is less than the width of rolling up the needle.

The utility model discloses a second of purpose lies in: the utility model provides a lithium ion battery, includes positive plate, negative pole piece and utmost point ear, the utmost point ear is any section in the preceding description integrated form utmost point ear structure, positive pole ear pin connection in the positive plate, negative pole ear pin connection in the negative pole piece.

As a preferred scheme of lithium ion battery, the positive plate includes the anodal mass flow body, the anodal mass flow body is provided with the empty paper tinsel district of positive pole, anodal ear lead wire weld in the empty paper tinsel district of positive pole.

As a preferred scheme of lithium ion battery, the positive plate includes the anodal mass flow body, the anodal mass flow body is provided with the empty paper tinsel district of positive pole, the empty paper tinsel district of positive pole extends there is false positive pole utmost point ear, positive pole ear lead welding in false positive pole utmost point ear. The false positive pole ear is obtained by die cutting of a positive pole current collector.

As a preferred scheme of lithium ion battery, the negative plate includes the negative pole mass flow body, the negative pole mass flow body is provided with the empty paper tinsel district of negative pole, negative pole ear lead welding in the empty paper tinsel district of negative pole.

As a preferred scheme of lithium ion battery, the negative pole piece includes the negative pole mass flow body, the negative pole mass flow body is provided with the empty paper tinsel district of negative pole, the empty paper tinsel district of negative pole extends there is false negative pole utmost point ear, negative pole ear lead welding in false negative pole utmost point ear. The false negative pole tab is obtained by die cutting of a negative pole current collector.

Compared with the prior art, the utility model discloses following beneficial effect has at least:

1) the utility model discloses with anodal ear area and negative pole ear area integration together, the macroscopic view shows for only one utmost point ear, is showing the manufacturability that has promoted little electric core, has practiced thrift the space of consumer effectively, provides good support for the structural optimization and the arrangement of consumer.

2) The utility model discloses an anodal ear area and negative pole ear area are connected through the insulating cement, at the in-process of the process of making or transportation, are showing the short circuit risk that has reduced anodal ear area and negative pole ear area direct contact and lead to.

3) The utility model discloses an integrated form utmost point ear structure can reduce scrapping that utmost point ear centre-to-centre spacing is bad to lead to effectively at the in-process of coiling, also descends to the design required precision of head at the in-process of encapsulation moreover, has promoted the manufacturing optimal rate of product.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.

Fig. 3 is a schematic structural view of the positive plate of the embodiment 3 to 4 of the present invention.

Fig. 4 is a schematic structural view of the negative electrode sheet of embodiments 3 to 4 of the present invention.

Fig. 5 is a schematic structural diagram of a lithium ion battery of the present invention.

Fig. 6 is a schematic structural view of a positive electrode sheet according to embodiment 5 of the present invention.

Fig. 7 is a schematic structural view of a negative electrode sheet of example 5 of the present invention.

Wherein: 1-pole lug body, 2-sealant, 3-positive pole piece, 4-negative pole piece, 5-pole lug, 11-positive pole lug strip, 12-negative pole lug strip, 13-insulating glue, 14-positive pole lug lead, 15-negative pole lug lead, 31-positive pole empty foil area, 32-false positive pole lug, 41-negative pole empty foil area and 42-false negative pole lug.

Detailed Description

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, within which a person skilled in the art can solve the technical problem to substantially achieve the technical result.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal "and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and 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.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be 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 skilled in the art.

The present invention will be described in further detail with reference to the accompanying drawings, which are not intended to limit the present invention.

Example 1

As shown in fig. 1, an integrated tab structure includes a tab body 1 and a sealant 2 coated on the surface of the tab body 1, the tab body 1 includes a positive tab band 11, a negative tab band 12, an insulating adhesive 13, a positive tab lead 14 and a negative tab lead 15, the positive tab band 11 and the negative tab band 12 are arranged side by side and connected through the insulating adhesive 13, the positive tab lead 14 is connected with the positive tab band 11, the negative tab lead 15 is connected with the negative tab band 12, and the positive tab lead 14 is separated from the negative tab lead 15. The positive tab band 11 and the positive tab lead 14 are made of aluminum, and the negative tab band 12 and the negative tab lead 15 are made of copper.

Preferably, the positive electrode tab 11 and the negative electrode tab 12 are connected to the insulating paste 13 by thermal fusion or crimping.

Preferably, the positive tab lead 14 and the positive tab band 11 are integrally formed. The negative electrode tab lead 15 and the negative electrode tab band 12 are integrally formed.

Example 2

As shown in fig. 2, the present embodiment is different from embodiment 1 in that: the positive tab lead 14 is welded to the positive tab band 11. The negative tab lead 15 is welded to the negative tab band 12.

The rest is the same as embodiment 1, and the description is omitted.

Example 3

As shown in fig. 3 to 5, a lithium ion battery includes a positive plate 3, a negative plate 4 and a tab 5; the tab 5 is the tab of example 1; the positive plate 3 comprises a positive current collector, the positive current collector is provided with a positive empty foil area 31, and the positive lug lead 14 is welded in the positive empty foil area 31; the negative plate 4 comprises a negative current collector, the negative current collector is provided with a negative empty foil area 41, and the negative tab lead 15 is welded in the negative empty foil area 41. The pole ear is combined with the packaging aluminum plastic film through the sealant 2. After the assembled battery is subjected to liquid injection and standing, formation is finished on a formation and grading cabinet, a cathode lug belt 12 is clamped by an anode of a cabinet point, an anode lug belt 11 is clamped by a cathode of the cabinet point, and the battery is charged and discharged.

Example 4

The difference from example 3 is: the tab 5 of the present embodiment is the tab of embodiment 2.

The rest is the same as embodiment 3, and the description is omitted.

Example 5

As shown in fig. 6 to 7, the present embodiment is different from embodiment 3 in that: the positive plate 3 comprises a positive current collector, the positive current collector is provided with a positive empty foil area 31, the positive empty foil area 31 extends to form a false positive electrode tab 32, and the positive electrode tab lead 14 is welded on the false positive electrode tab 32. The negative plate 4 comprises a negative current collector, the negative current collector is provided with a negative empty foil area 41, the negative empty foil area 41 extends to form a false negative electrode tab 42, and the negative electrode tab lead 15 is welded on the false negative electrode tab 42.

The rest is the same as embodiment 3, and the description is omitted.

While the foregoing description shows and describes several preferred embodiments of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive of other embodiments, and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed above, or as otherwise known in the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. An integrated form utmost point ear structure which characterized in that: including utmost point ear body and cladding in sealed glue on utmost point ear body surface, utmost point ear body includes anodal ear area, negative pole ear area, insulating cement, anodal ear lead wire and negative pole ear lead wire, anodal ear area with the negative pole ear area sets up side by side and passes through the insulating cement is connected, anodal ear lead wire with anodal ear area is connected, negative pole ear lead wire with the negative pole ear area is connected, anodal ear lead wire with the setting is separated to negative pole ear lead wire.

2. The integrated tab structure of claim 1, wherein: the positive lug lead and the positive lug belt are of an integrally formed structure.

3. The integrated tab structure of claim 1, wherein: and the positive lug lead is welded with the positive lug belt.

4. The integrated tab structure of claim 1, wherein: the negative pole ear lead and the negative pole ear belt are of an integrally formed structure.

5. The integrated tab structure of claim 1, wherein: and the negative electrode lug lead is welded with the negative electrode lug band.

6. A lithium ion battery, characterized by: the integrated tab structure comprises a positive tab, a negative tab and a tab, wherein the tab is the integrated tab structure according to any one of claims 1 to 5, the positive tab is connected with the positive tab through a lead, and the negative tab is connected with the negative tab through a lead.

7. The lithium ion battery of claim 6, wherein: the positive plate comprises a positive current collector, the positive current collector is provided with a positive empty foil area, and the positive lug lead is welded in the positive empty foil area.

8. The lithium ion battery of claim 6, wherein: the positive plate includes the anodal mass flow body, the anodal mass flow body is provided with the empty paper tinsel district of positive pole, the empty paper tinsel district of positive pole extends there is false positive pole utmost point ear, positive pole ear lead welding in false positive pole utmost point ear.

9. The lithium ion battery of claim 6, wherein: the negative pole piece includes the negative pole mass flow body, the negative pole mass flow body is provided with the empty paper tinsel district of negative pole, negative pole ear lead wire weld in the empty paper tinsel district of negative pole.

10. The lithium ion battery of claim 6, wherein: the negative pole piece includes the negative pole mass flow body, the negative pole mass flow body is provided with the empty paper tinsel district of negative pole, the empty paper tinsel district of negative pole extends there is false negative pole utmost point ear, negative pole ear lead welding in false negative pole utmost point ear.