CN211907570U - Tab structure, battery and battery module - Google Patents

Abstract

The utility model discloses a utmost point ear structure, battery and module, utmost point ear structure include a plurality of monomer utmost point ears that overlap the setting, and the one end of monomer utmost point ear is located the inside of battery, and the other end of a plurality of monomer utmost point ears extends to the outside of battery and forms utmost point post jointly, and utmost point ear is structural has seted up at least one trompil, and utmost point ear structure forms the fusing area that the cross-section reduces that overflows in the both sides of trompil. The utility model discloses a utmost point ear structure overlaps the setting through a plurality of monomer utmost point ears, forms the form stable utmost point post in one end, still forms the fusing area through seting up the trompil, consequently need not to set up utmost point post structure and fusing structure in addition again, has reduced the figure of part, has simplified the assembly process of battery, has reduced manufacturing cost. In addition, the pole formed in the mode can be flatly arranged, and is convenient to be connected with external equipment.

Description

Tab structure, battery and battery module

Technical Field

The utility model relates to a battery manufacturing technology field especially relates to a utmost point ear structure, battery and battery module.

Background

The utmost point post of current battery generally adopts cylindrical utmost point post, and utmost point post passes through the flexible coupling and realizes the electricity with utmost point ear and be connected, sets up the fusing structure in the flexible coupling, and when the battery is inside when too big because of taking place the electric current that the abnormity leads to producing, thereby fusing structure fracture breaks off the battery and is connected with external circuit's electricity, prevents that the inside further reaction of battery from leading to the battery to take place the accidents such as weeping, firing or explosion. However, such a structure is complicated, complicated in process and high in cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a utmost point ear structure, battery and battery module have simple structure, the lower advantage of cost.

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

on the one hand, provide a utmost point ear structure, including a plurality of monomer utmost point ears that overlap the setting, the one end of monomer utmost point ear is located the inside of battery, and is a plurality of the other end of monomer utmost point ear extends to the outside of battery forms utmost point post jointly, utmost point ear is structural has seted up at least one trompil, utmost point ear structure is in the both sides of trompil form the fusing zone that the cross-section reduces.

As a preferred scheme of the utility model, utmost point post both sides are provided with spacing convex part, spacing convex part sets up inside the battery.

As an optimized proposal of the utility model, the open pore is a rectangular hole, a waist-shaped hole, a round hole or an elliptical hole.

As a preferred scheme of the utility model, the quantity more than or equal to two of trompil, the quantity more than or equal to three in fusing district, and a plurality of the cross-section size that overflows in fusing district equals.

As an optimized scheme of the utility model, it is a plurality of monomer utmost point ear welds as an organic wholely.

On the other hand, provide a battery, including apron and above-mentioned technical scheme utmost point ear structure, offer the confession on the apron the through-hole that the one end of utmost point post passed, spacing convex part sets up the apron is close to one side of battery inside.

As an optimized scheme of the utility model, spacing convex part with be provided with the insulating part between the apron.

As a preferred scheme of the present invention, the battery includes at least one core package, a plurality of pole pieces are disposed in the core package, the pole pieces include metal foils and active materials coated on the metal foils, and the single tab is welded to the empty foil area of the pole piece where the active materials are not coated;

or, the hollow foil area is provided with an extension part, and the extension part forms the single tab.

As a preferred aspect of the present invention, the core package is a winding core package or a laminated core package.

In addition, still provide a battery module, include a plurality of above-mentioned any technical scheme the battery.

The utility model has the advantages that:

the utility model discloses a utmost point ear structure overlaps the setting through a plurality of monomer utmost point ears, forms the form stable utmost point post in one end, still forms the fusing area through seting up the trompil, consequently need not to set up utmost point post structure and fusing structure in addition again, has reduced the figure of part, has simplified the assembly process of battery, has reduced manufacturing cost. In addition, the pole formed in the mode can be flatly arranged, and is convenient to be connected with external equipment.

Drawings

Fig. 1 is a schematic perspective view of a tab structure according to an embodiment of the present invention;

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

FIG. 3 is a side view of FIG. 1;

fig. 4 is a front view of a tab structure according to another embodiment of the present invention;

fig. 5 is a schematic structural view of the assembled tab structure and cover plate in the embodiment of fig. 1.

In the figure:

1. a single tab; 11. a pole column; 12. opening a hole; 13. a fuse region; 14. a limiting convex part; 100. a tab structure; 200. a cover plate; 300. an insulating member.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the word "over" a first feature or feature in a second feature may include the word "over" or "over" the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under" a second feature may include a first feature that is directly under and obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

As shown in fig. 1 to fig. 3, the tab structure 100 of this embodiment includes a plurality of monomer tabs 1 that overlap and set up, and the one end of monomer tab 1 is located the inside of battery, and the other end of a plurality of monomer tabs 1 extends to the outside of battery and forms utmost point post 11 jointly, has seted up at least one trompil 12 on the tab structure 100, and tab structure 100 forms the fusing zone 13 that the cross-section reduces that overflows in the both sides of trompil 12.

The utmost point ear structure 100 of this embodiment overlaps through a plurality of monomer utmost point ears 1 and sets up, forms the utmost point post 11 of stable form in one end, still forms fusing area 13 through seting up trompil 12, consequently need not to set up utmost point post structure and fusing structure in addition again, has reduced the figure of part, has simplified the assembly process of battery, has reduced manufacturing cost. In addition, the pole 11 formed in this way can be arranged flatly, and is convenient to be connected with external equipment.

The number of the unit tabs 1 constituting the tab structure 100 in this embodiment is visually represented as eleven, and this number is merely for convenience of illustration, and considering that the thickness of the unit tabs 1 is generally thin, the number of the unit tabs 1 in an actual production process may be larger than this value.

Preferably, the limit convex parts 14 are arranged on two sides of the pole 11, and the limit convex parts 14 are arranged inside the battery. The limiting convex part 14 can be arranged to well fix the tab structure 100, so that the assembly of the battery is convenient.

Specifically, the opening 12 is a rectangular hole, a kidney-shaped hole, a circular hole, or an elliptical hole, and the shape of the opening 12 is not limited in theory, but the more conventional shape is preferable in view of the processing difficulty, so as to facilitate the manufacturing.

Furthermore, the number of the openings 12 is greater than or equal to two, the number of the fusing regions 13 is greater than or equal to three, and the overcurrent cross sections of the fusing regions 13 are equal in size. As shown in fig. 4, the tab structure 100 of the illustrated embodiment has four openings 12, so that five fuse regions 13 are created, wherein three fuse regions 13 are located between two adjacent openings 12, and two fuse regions 13 are located between the openings 12 and the edge of the tab structure 100.

Compared with the tab structure 100 of the previous embodiment with only one opening 12, the area of each opening 12 of the tab structure 100 of the present embodiment is significantly reduced, so that the tab structure 100 of the present embodiment has higher strength, is not easy to deform in the process of battery assembly, and the fusing region 13 is not easy to break accidentally due to collision or other external force factors, and has higher reliability. Because the overcurrent cross sections of the fusing regions 13 are equal in size, when current reaching the fusing size is generated, the fusing regions 13 can be fused at the same time, so that a circuit is disconnected, the reaction in the battery is stopped, and accidents such as liquid leakage, fire or explosion of the battery are prevented.

Preferably, a plurality of single tabs 1 are welded by laser into a whole, and the thickness of the single tab 1 is thinner, so that the laser welding mode with higher precision and capable of controlling the welding energy more accurately is adopted, the single tab 1 is prevented from being damaged during welding, and the quality of the tab structure 100 is improved.

The embodiment of the utility model provides a battery is still provided, including the utmost point ear structure 100 of apron 200 and above-mentioned embodiment, set up the through-hole that supplies the one end of utmost point post 11 to pass on the apron 200, spacing convex part 14 sets up the one side that is close to the battery inside at apron 200. Because the tab structure 100 is an integral structure, the parts cannot be separated, and the assembly of the tab structure 100 with the cover plate 200 can only select the form of the limit convex part 14 but not select the form of forming the limit groove on the tab structure 100, which may result in that the tab structure 100 cannot be assembled into the through hole formed on the cover plate 200.

As shown in fig. 5, an insulating member 300 is preferably disposed between the limit projection 14 and the cover plate 200. In some types of batteries, one of the positive or negative posts is insulated from the lid plate 200 and the other is electrically connected to the lid plate 200, and in some cases, both the positive and negative posts are insulated from the lid plate 200, so that it is necessary to provide an insulating member 300 between the limit projection 14 and the lid plate 200.

Further, the battery comprises at least one core package (not shown in the figure), a plurality of pole pieces (not shown in the figure) are arranged in the core package, the pole pieces comprise metal foils and active substances coated on the metal foils, and the single tab 1 is welded with a hollow foil area of the pole piece, which is not coated with the active substances;

alternatively, the empty foil area has an extension, which forms a one-piece tab 1.

The single tab 1 has two types of arrangement, one type is used as an extension part of a hollow foil area, so that the welding operation of the single tab 1 and a pole piece can be omitted, and the problem of battery quality caused by the welding problem is also avoided. And the other is that the single tab 1 is welded with the empty foil area on the pole piece in a conventional mode.

Further, the core package is a winding core package or a laminated core package. The tab structure 100 can be formed by using a winding core or a laminated core for the pole pieces.

The embodiment of the utility model provides a battery module is still provided, including the battery of any of a plurality of above-mentioned embodiments, owing to adopted utmost point ear structure 100, make this kind of battery have easily assembly and the lower advantage of manufacturing cost.

As a preferred embodiment of the present invention, in the description of the present specification, reference to the description of the terms "preferred", "further" or the like means that a particular feature, structure, material, or characteristic described in connection with the example or illustration is included in at least one example or illustration of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments are only used to illustrate the detailed embodiments of the present invention, and the present invention is not limited to the above detailed embodiments, i.e. the present invention must not be implemented depending on the detailed embodiments. It should be clear to those skilled in the art that any improvement of the present invention, to the equivalent replacement of each raw material of the present invention, the addition of auxiliary components, the selection of specific modes, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims (10)

1. The utility model provides a utmost point ear structure, its characterized in that includes a plurality of monomer utmost point ears that overlap the setting, the one end of monomer utmost point ear is located the inside of battery, and is a plurality of the other end of monomer utmost point ear extends to the outside of battery forms utmost point post jointly, utmost point ear is structural has seted up at least one trompil, utmost point ear structure is in the both sides of trompil form the fusing area that the cross-section reduces.

2. The tab structure of claim 1, wherein limiting convex parts are arranged on two sides of the pole, and the limiting convex parts are arranged inside the battery.

3. The tab structure as claimed in claim 2, wherein the opening is a rectangular hole, a kidney-shaped hole, a circular hole or an elliptical hole.

4. The tab structure of claim 3, wherein the number of the openings is equal to or greater than two, the number of the fusing regions is equal to or greater than three, and the overcurrent cross sections of the fusing regions are equal in size.

5. The tab structure of claim 2, wherein a plurality of the unit tabs are welded together.

6. A battery is characterized by comprising a cover plate and the tab structure of any one of claims 2 to 5, wherein the cover plate is provided with a through hole for one end of the tab to pass through, and the limiting convex part is arranged on one side of the cover plate close to the inside of the battery.

7. The battery of claim 6, wherein an insulator is disposed between the limiting protrusion and the cover plate.

8. The battery of claim 6, comprising at least one core pack, wherein a plurality of pole pieces are arranged in the core pack, the pole pieces comprise metal foils and active materials coated on the metal foils, and the monomer tabs are welded with the empty foil areas of the pole pieces which are not coated with the active materials;

or, the hollow foil area is provided with an extension part, and the extension part forms the single tab.

9. The battery of claim 8, wherein the core pack is a wound or laminated core pack.

10. A battery module comprising a plurality of the batteries according to any one of claims 6 to 9.

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