CN216288861U

CN216288861U - Battery pack

Info

Publication number: CN216288861U
Application number: CN202122630446.0U
Authority: CN
Inventors: 王永明
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-04-12
Anticipated expiration: 2031-10-29

Abstract

The present invention provides a battery pack including: a cell body; the lug is arranged on the side end face of the battery cell body and is connected with the battery cell body; the pole assembly comprises a pole and a connecting bracket, the pole is arranged on the connecting bracket, and the connecting bracket is connected with the pole lug; wherein at least part of the connecting bracket is arranged in a bendable way. The utility model solves the problem of low battery yield in the prior art.

Description

Battery pack

Technical Field

The utility model relates to the technical field of battery structure design, in particular to a battery assembly.

Background

At present, with the continuous development of new energy industry, taking a battery as an example, a square battery has a high proportion in the market due to good safety performance.

However, in the manufacturing process of the conventional square battery, most of the space on the top side is wasted due to the thickness of the cover plate and the thickness of the plastic part for protecting the tab, and meanwhile, due to the long size, the cover plate is easy to deform, so that the defective rate in the manufacturing process of the battery is greatly increased, and the yield of the battery is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a battery assembly to solve the problem of low battery yield in the prior art.

In order to achieve the above object, the present invention provides a battery pack including: a cell body; the lug is arranged on the side end face of the battery cell body and is connected with the battery cell body; the pole assembly comprises a pole and a connecting bracket, the pole is arranged on the connecting bracket, and the connecting bracket is connected with the pole lug; wherein at least part of the connecting bracket is arranged in a bendable way.

Further, the connecting bracket includes: the pole column is arranged at the end part of the support piece; the connecting piece is installed on the side of support piece, and the connecting piece is connected with the utmost point ear, and the setting that the connecting piece can buckle for support piece.

Further, the connector includes: the first metal sheet layer comprises one or more first metal sheets, and the first metal sheets are sequentially stacked and connected with each other; wherein, the extending direction of the first metal sheet layer is consistent with that of the support.

Further, the battery assembly further includes: the folding leg, the both ends of folding leg respectively with utmost point ear and this body coupling of electricity core, the folding leg sets up foldingly to make utmost point ear and the laminating of electricity core body, or make utmost point ear open towards the direction of keeping away from electricity core body.

Further, the tab includes: the second metal sheet layer comprises one or more second metal sheets, the second metal sheets are sequentially stacked and connected with one another, and the connecting support is connected with the second metal sheet layer.

Further, the battery assembly further includes: the battery cell comprises a shell, a battery cell body and a battery cell, wherein the battery cell body is arranged in the shell; and the explosion-proof component is arranged at the mounting opening.

Further, the housing includes: the mounting opening is formed in the top plate, and the explosion-proof component is connected with the top plate.

Further, the explosion-proof part comprises an explosion-proof plate, and an explosion-proof groove is formed in the explosion-proof plate.

Further, the height of the housing is 60mm to 200 mm; and/or the length of the shell is 100mm to 1500mm, and/or the thickness of the shell is 10mm to 50 mm.

Further, the battery assembly further includes: the insulating layer is arranged between the pole lug and the shell, and two opposite end faces of the insulating layer are respectively attached to the pole lug and the shell.

By applying the technical scheme of the utility model, the battery assembly comprises a battery cell body, a lug and a pole post assembly, wherein the lug is arranged on the side end face of the battery cell body and is connected with the battery cell body; wherein at least part of the connecting bracket is arranged in a bendable way. Like this at the in-process of equipment battery, because the linking bridge can buckle, increased the flexibility that linking bridge and utmost point ear are connected, at the in-process of linking bridge and utmost point ear connection difficult rupture, in addition, can also reduce battery pack's whole volume through linking bridge buckling, reduce the apron and warp the scheduling problem, improve the yield of battery preparation.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is an exploded view showing the structure of an embodiment of a battery pack according to the present invention;

fig. 2 shows a schematic structural diagram of a cell body of a battery assembly according to the present invention.

Wherein the figures include the following reference numerals:

1. a cell body; 2. a tab; 3. a pole assembly; 30. a pole column; 31. connecting a bracket; 310. a support member; 311. a connecting member; 3110. a first metal sheet layer; 4. a folding frame; 20. a second metal sheet layer; 5. a housing; 50. a top plate; 6. an explosion-proof component.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring to fig. 1 to 2, the present invention provides a battery assembly, including: a cell body 1; the lug 2 is arranged on the side end face of the battery cell body 1 and is connected with the battery cell body 1; the pole assembly 3, the pole assembly 3 includes the pole 30 and connects the support 31, the pole 30 is installed on connecting the support 31, connect the support 31 to connect with ear 2; wherein at least a part of the connecting bracket 31 is bendable.

The battery assembly provided by the utility model comprises a battery cell body 1, a tab 2 and a pole assembly 3, wherein the tab 2 is arranged on the side end face of the battery cell body 1 and is connected with the battery cell body 1, the pole assembly 3 comprises a pole 30 and a connecting support 31, the pole 30 is arranged on the connecting support 31, and the connecting support 31 is connected with the tab 2; wherein at least a part of the connecting bracket 31 is bendable. Like this at the in-process of equipment battery, because linking bridge 31 can buckle, increased linking bridge 31 and the flexibility that utmost point ear 2 is connected, at the difficult rupture of the in-process that linking bridge 31 and utmost point ear 2 are connected, in addition, can also reduce battery pack's whole volume through linking bridge 31 can buckle, reduce the problem such as apron deformation, improve the yield of battery preparation.

Specifically, the connecting bracket 31 includes: a support 310, wherein the pole 30 is installed at the end of the support 310; and a connecting member 311 installed on a side surface of the supporting member 310, the connecting member 311 being connected to the tab 2, the connecting member 311 being disposed to be bendable with respect to the supporting member 310. The pole post 30 is supported by the support member 310, and the pole post 30 and the connection member 311 are connected by the support member 310, so that the current at the tab 2 can be conducted to the pole post 30 after the connection member 311 is connected to the tab 2.

In a specific implementation, the connection part 311 includes: the first metal sheet layer 3110, the first metal sheet layer 3110 includes one or more first metal sheets, and the plurality of first metal sheets are sequentially stacked and connected to each other; wherein, the first metal sheet layer 3110 is aligned with the extending direction of the supporting member 310. The thickness of first sheetmetal is 0.1mm to 1.5mm, and it has good ductility, is difficult for the fracture after discovering deformation or buckling, through setting up one or more first sheetmetals, makes to be connected more firmly between connecting piece 311 and the utmost point ear 2, has guaranteed the security of battery.

In an embodiment provided by the present invention, the battery assembly further comprises: folding leg 4, folding leg 4's both ends are connected with utmost point ear 2 and electric core body 1 respectively, and folding leg 4 sets up foldingly to make utmost point ear 2 and the laminating of electric core body 1, or make utmost point ear 2 open towards the direction of keeping away from electric core body 1. When utmost point ear 2 is opened for electric core body 1 through folding leg 4, support utmost point ear 2, make connecting piece 311 and utmost point ear 2 welding, after the welding is accomplished, turn over an utmost point ear 2 and make utmost point ear 2 and laminating of electric core body 1.

Specifically, the tab 2 includes: and the second metal sheet layer 20, the second metal sheet layer 20 includes one or more second metal sheets, the second metal sheets are sequentially stacked and connected to each other, and the connecting bracket 31 is connected to the second metal sheet layer 20. Specifically, the thickness of the second metal sheet is 0.1mm to 1.5mm, and the first metal sheet layer 3110 and the second metal sheet layer 20 are matched with each other, so that the tab 2 and the pole 30 are stably connected with each other.

As shown in fig. 1, the battery module further includes: the battery cell comprises a shell 5, wherein a battery cell body 1 is installed in the shell 5, and an installation opening is formed in the shell 5; and the explosion-proof component 6 is arranged at the mounting opening. The battery is protected by arranging the explosion-proof component 6, and the safety of the battery is improved.

Further, the housing 5 includes: and a top plate 50 having an opening for mounting the explosion-proof member 6 and connected to the top plate 50. The arrangement can reduce the thickness of the top plate 50 in the manufacturing process, optimize the appearance structure of the battery assembly, fully utilize the space at the top in the shell 5 and improve the energy density level of the battery.

Wherein, explosion-proof part 6 includes the explosion-proof board, is provided with explosion-proof recess on the explosion-proof board. The strength of the explosion-proof plate is reduced at the position where the explosion-proof groove is formed in the explosion-proof plate, and when the air pressure in the shell 5 is gradually increased, the explosion-proof plate is torn at the explosion-proof groove to discharge high-pressure air, so that the safety of the battery is ensured.

In another embodiment provided by the present invention, the explosion-proof component 6 is provided in plurality, and the plurality of explosion-proof components 6 are arranged at intervals around the circumference of the housing 5.

In order to optimize the overall size of the battery and to increase the energy density level of the battery, the height of the case 5 is 60mm to 200 mm; and/or the length of the housing 5 is 100mm to 1500mm, and/or the thickness of the housing 5 is 10mm to 50 mm.

The battery pack further includes: the insulating layer is arranged between the electrode lug 2 and the shell 5, and two opposite end surfaces of the insulating layer are respectively attached to the electrode lug 2 and the shell 5. Thus, the effective and reliable insulation state between the pole ear 2 and the shell 5 is kept, and the safety performance of the battery is improved.

When concrete implementation, through stretching out utmost point ear 2 in electric core body 1's side, can adjust utmost point ear 2's size according to actual demand's current-carrying capacity to satisfy actual demand, utmost point post stretches out in two sides of casing 5 simultaneously, realizes the space utilization maximize, realizes inclusion high energy density level.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by 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 protection scope of the present invention.

Claims

1. A battery assembly, comprising:

a cell body (1);

the lug (2) is arranged on the side end face of the battery cell body (1) and is connected with the battery cell body (1);

the terminal post assembly (3), the terminal post assembly (3) comprises a terminal post (30) and a connecting support (31), the terminal post (30) is installed on the connecting support (31), and the connecting support (31) is connected with the terminal lug (2);

wherein the connecting bracket (31) is at least partially bendable.

2. The battery assembly according to claim 1, wherein the connection bracket (31) comprises:

a support (310), the pole (30) being mounted at an end of the support (310);

the connecting piece (311) is installed on the side face of the supporting piece (310), the connecting piece (311) is connected with the pole lug (2), and the connecting piece (311) is arranged in a manner of being bendable relative to the supporting piece (310).

3. The battery assembly according to claim 2, wherein the connection member (311) comprises:

a first metal sheet layer (3110), the first metal sheet layer (3110) including one or more first metal sheets, the first metal sheets being sequentially stacked and connected to each other;

wherein the first sheet metal layer (3110) coincides with an extension direction of the support (310).

4. The battery assembly of claim 1, further comprising:

folding leg (4), the both ends of folding leg (4) respectively with utmost point ear (2) with electricity core body (1) are connected, folding leg (4) set up foldingly, so that utmost point ear (2) with electricity core body (1) laminating, or make utmost point ear (2) orientation is kept away from the direction of electricity core body (1) is opened.

5. The battery assembly according to claim 4, wherein the tab (2) comprises:

the second metal sheet layer (20), second metal sheet layer (20) include one or more second sheet metal, and is a plurality of second sheet metal is laminated setting in proper order and interconnect, linking bridge (31) with second sheet metal (20) are connected.

6. The battery assembly according to any one of claims 1 to 5, further comprising:

the battery cell comprises a shell (5), wherein the battery cell body (1) is installed in the shell (5), and an installation opening is formed in the shell (5);

and the explosion-proof component (6) is arranged at the mounting opening.

7. The battery assembly according to claim 6, wherein the housing (5) comprises:

the mounting opening is formed in the top plate (50), and the explosion-proof component (6) is connected with the top plate (50).

8. A battery pack according to claim 6, characterized in that the explosion-proof member (6) comprises an explosion-proof plate provided with explosion-proof grooves.

9. The battery assembly of claim 6,

the height of the shell (5) is 60mm to 200 mm; and or (b) a,

the length of the housing (5) is 100mm to 1500mm, and/or,

the thickness of the shell (5) is 10mm to 50 mm.

10. The battery assembly of claim 6, further comprising:

the insulating layer sets up utmost point ear (2) with between casing (5), two terminal surfaces of the relative setting of insulating layer respectively with utmost point ear (2) with casing (5) laminating.