CN215933702U

CN215933702U - Battery top cap structure and battery

Info

Publication number: CN215933702U
Application number: CN202122380680.2U
Authority: CN
Inventors: 左帆帆; 宁亚军; 姬嘉帅; 于东朋; 王俊; 夏天军
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-03-01
Anticipated expiration: 2031-09-29

Abstract

The utility model discloses a battery top cover structure and a battery, and belongs to the technical field of batteries, wherein the battery top cover structure comprises a top cover body and a fuse, the top cover body is provided with a first mounting surface and a second mounting surface which are arranged at intervals, a positive lug can be fixedly connected with the first mounting surface, and a negative lug can be fixedly connected with the second mounting surface; the fuse is fixedly connected with the first mounting surface. The battery top cover structure provided by the utility model has the advantages that the top cover body is not communicated with the lug through the connecting sheet, namely, the current is directly transmitted to the top cover body through the lug, so that the effect of reducing the weight of the battery top cover structure is realized, the energy density of the battery is improved, the overcurrent capacity of the battery is improved, and the battery top cover structure is convenient to assemble. The battery provided by the utility model is simple to assemble and high in assembly efficiency.

Description

Battery top cap structure and battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery top cover structure and a battery.

Background

With the development of the electrical appliance industry, the application of the battery is more and more extensive.

In a commonly used square battery, a top cover is connected with a tab through a connecting sheet, a fuse is arranged on the connecting sheet connected with the tab, fig. 1 shows the structure of the conventional battery, the connecting mode of the top cover 1 'and the connecting sheet 2' is laser welding, the connecting mode of the connecting sheet 2 'and the tab 3' is ultrasonic welding, and the fuse 4 'is fixed on the connecting sheet 2'.

The structure in which the fuse is provided on the tab increases the difficulty of welding the tab, and increases the weight of the tab, resulting in a decrease in the energy density of the battery. And with the improvement of the requirement on the overcurrent capacity of the battery, the thickness of the connecting sheet is larger and larger, so that the welding of the connecting sheet is difficult, the weight of the battery is increased, and the energy density of the battery is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a battery top cover structure and a battery, and aims to solve the technical problems that in the prior art, the thickness and the weight of a connecting sheet for connecting a battery top cover and a battery tab are large, so that the battery is difficult to assemble, and the energy density of the battery is reduced.

As the conception, the technical scheme adopted by the utility model is as follows:

a battery top cap structure comprising:

the top cover comprises a top cover body, a first mounting surface and a second mounting surface are arranged at intervals, a positive electrode lug can be fixedly connected with the first mounting surface, and a negative electrode lug can be fixedly connected with the second mounting surface;

and the fuse is fixedly connected with the first mounting surface.

Further, the positive tab is laser welded to the first mounting surface, and the negative tab is laser welded to the second mounting surface.

Furthermore, two positive lugs are arranged on the first mounting surface at intervals.

Furthermore, two negative electrode lugs are arranged on the second mounting surface at intervals.

Further, the top cover body comprises a positive base and a negative base, the positive base is provided with the first mounting surface, and the negative base is provided with the second mounting surface.

Furthermore, the negative electrode lug is a copper lug, and the negative electrode base is a copper base.

Further, the positive electrode lug is an aluminum electrode lug, and the positive base is an aluminum base.

Further, the fuse is riveted with the positive electrode base.

Further, the positive electrode tab, the negative electrode tab, the positive base and the negative base are cuboids.

A battery includes a battery body structure and a battery top cap structure as described above.

The utility model has the beneficial effects that:

the utility model provides a battery top cover structure, which is characterized in that a fuse is fixed on a first mounting surface of a top cover body, a positive electrode lug is directly and fixedly connected with the first mounting surface, a negative electrode lug is directly and fixedly connected with a second mounting surface, the top cover body is not communicated with the lug through a connecting sheet, namely, current is directly transmitted to the top cover body through the lug, so that the effect of reducing the weight of the battery top cover structure is realized, the energy density of a battery is improved, the overcurrent capacity of the battery is improved, and the battery is convenient to assemble. The utility model provides a battery which is simple to assemble and high in assembling efficiency.

Drawings

Fig. 1 is a schematic structural view of a conventional battery;

fig. 2 is a schematic structural view of a battery provided in an embodiment of the present invention when a battery body is unfolded;

fig. 3 is a schematic structural diagram of a battery provided in an embodiment of the present invention.

In fig. 1:

1', a top cover; 2', connecting sheets; 3', a tab; 4', fuse.

In fig. 2 and 3:

10. a pole group;

1. a tab; 11. a positive tab; 12. a negative tab;

2. a top cover body; 21. a positive electrode base; 22. a negative electrode base;

3. and a fuse.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

The embodiment of the utility model provides a battery which is used for supplying power to an electric appliance. The battery comprises a battery body structure and a battery top cover structure, and the battery top cover structure is connected with the battery body structure.

The battery is a square battery, and the battery body structure comprises a pole group 10, wherein the pole group 10 comprises a pole lug 1, and the pole lug 1 comprises a positive pole lug 11 and a negative pole lug 12.

Referring to fig. 2 and 3, the battery top cover structure comprises a top cover body 2 and a fuse 3, wherein the top cover body 2 is provided with a first mounting surface and a second mounting surface which are arranged at intervals, a positive tab 11 can be fixedly connected with the first mounting surface, and a negative tab 12 can be fixedly connected with the second mounting surface; the fuse 3 is fixedly connected with the first mounting surface.

Through fixing fuse 3 on the first installation face of top cap body 2, again with anodal ear 11 and the direct fixed connection of first installation face, negative pole ear 12 and the direct fixed connection of second installation face need not to communicate top cap body 2 with utmost point ear 1 through the connection piece, the electric current is direct to be transmitted to top cap body 2 by utmost point ear 1 promptly, thereby realized the effect that alleviates the weight of battery top cap structure, improve the energy density of battery, the overcurrent capacity of battery has been promoted, the equipment of being convenient for. The battery provided by the utility model is simple to assemble and high in assembly efficiency.

The laser welding of positive tab 11 and first installation face, negative pole tab 12 and second installation face, the laser welding can be with the minimum required quantity that falls into the heat for utmost point tab 1 and top cap body 2 are little because of the deflection that heat-conduction leads to, do not need to use the electrode, pollute little, and the welding time is short, the laser welding does not belong to the contact welding, the consume and the deformation of machines are low, because the laser beam can focus on very little region, be convenient for weld little article, be convenient for accurate alignment weldment, the size of battery can not influence welded quality.

Two positive lugs 11 are arranged, and the two positive lugs 11 are arranged on the first mounting surface at intervals.

Two negative electrode tabs 12 are arranged, and the two negative electrode tabs 12 are arranged on the second mounting surface at intervals.

That is, the battery includes two pole groups 10, and both of the two pole groups 10 flow over the battery body 2.

The top cover body 2 includes a positive electrode base 21 and a negative electrode base 22, the positive electrode base 21 having a first mounting surface, the negative electrode base 22 having a second mounting surface.

The process of battery top cap structure and battery body structural installation does promptly, expandes the utmost point ear 1 of two utmost point groups 10 earlier, and two 11 adjacent settings in interval of anodal ear, and two 12 adjacent settings in interval of negative pole ear, and other parts of two utmost point groups 10 are located utmost point ear 1's upper and lower both sides respectively, with two anodal ear 11 and the laser welding of positive electrode base 21, two negative pole ears 12 and the laser welding of negative electrode base 22, and the laminating of two utmost point groups 10, laminating department accessible sticky tape fixed connection again.

The negative electrode tab 12 is a copper tab, the negative electrode base 22 is a copper base, and the copper tab and the copper base have good conductivity, corrosion resistance, easy processing, low price and convenient material taking.

The positive electrode tab 11 is an aluminum electrode tab, the positive base 21 is an aluminum base, and the aluminum electrode tab and the aluminum base have the advantages of good conductivity, light weight, stable chemical performance, little pollution, low cost and convenient material taking.

Of course, other suitable materials may be used for the positive electrode tab 11, the negative electrode tab 12, the positive electrode base 21 and the negative electrode base 22, and in general, the positive electrode tab 11 and the positive electrode base 21 are made of the same material, and the negative electrode tab 12 and the negative electrode base 22 are made of the same material.

The fuse 3 is arranged on the aluminum base, and the copper base 22 has strong overcurrent capacity and is not easy to fuse, so that the fuse 3 is arranged on the aluminum base which is easy to fuse, namely the fuse 3 is arranged on the first mounting surface.

The fuse 3 is riveted with the positive electrode base 21, riveting operation is convenient, and connection is stable and reliable.

Anodal ear 11, negative pole ear 12, anodal base 21 and negative pole base 22 are the cuboid, because the battery is square battery, and the cuboid structure is more convenient for install to it is the rectangle surface to make anodal ear 11 and anodal base 21 and negative pole ear 12 and negative pole base 22's area of contact big, and the welding is more stable.

The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the utility model, which changes and modifications are within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A battery top cap structure, comprising:

the top cover comprises a top cover body (2), wherein the top cover body (2) is provided with a first mounting surface and a second mounting surface which are arranged at intervals, a positive electrode lug (11) can be fixedly connected with the first mounting surface, and a negative electrode lug (12) can be fixedly connected with the second mounting surface;

and the fuse (3), and the fuse (3) is fixedly connected with the first mounting surface.

2. The battery top cap structure according to claim 1, wherein the positive tab (11) is laser welded to the first mounting surface and the negative tab (12) is laser welded to the second mounting surface.

3. The battery top cover structure according to claim 1, wherein two positive lugs (11) are provided, and the two positive lugs (11) are arranged on the first mounting surface at intervals.

4. The battery top cap structure of claim 1, wherein there are two negative tabs (12), and the two negative tabs (12) are spaced apart on the second mounting surface.

5. The battery top cover structure of claim 1, wherein said top cover body (2) comprises a positive base (21) and a negative base (22), said positive base (21) having said first mounting surface and said negative base (22) having said second mounting surface.

6. The battery top cap structure of claim 5, wherein the negative tab (12) is a copper tab and the negative base (22) is a copper base.

7. The battery top cap structure of claim 5, wherein the positive tab (11) is an aluminum tab and the positive base (21) is an aluminum base.

8. The battery top cover structure according to claim 5, wherein the fuse (3) is riveted to the positive electrode base (21).

9. The battery top cap structure of claim 5, wherein the positive tab (11), the negative tab (12), the positive base (21) and the negative base (22) are cuboids.

10. A battery comprising a battery body structure and a battery top cover structure according to any one of claims 1 to 9.