CN216597892U

CN216597892U - Connection structure of electricity core module, electricity core module and battery

Info

Publication number: CN216597892U
Application number: CN202122437394.5U
Authority: CN
Inventors: 卢耀智; 洪秀玉; 罗斌
Original assignee: Evergrande New Energy Technology Shenzhen Co Ltd
Current assignee: Evergrande New Energy Technology Shenzhen Co Ltd
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2022-05-24
Anticipated expiration: 2031-10-09

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a connection structure of a battery cell module, the battery cell module and a battery. The connection structure of the battery cell module comprises a battery cell and a busbar. The battery cell comprises a battery cell body and a lug connected to the transverse end of the battery cell body. The busbar is arranged along the longitudinal direction and is located the horizontal outside of electricity core. Wherein, the tab extends towards the busbar and includes a bending extension plate which can be bent to fit the lateral outer side wall of the busbar. According to the technical scheme, the lug comprises the bending extension plate, and the bending extension plate can be bent to be attached to the transverse outer side wall of the bus bar, so that a lug through hole for penetrating the lug is not required to be formed in the bus bar, and the overcurrent capacity of the bus bar is ensured.

Description

Connection structure of electricity core module, electricity core module and battery

Technical Field

The utility model belongs to the technical field of batteries, and particularly relates to a connection structure of a battery cell module, the battery cell module and a battery.

Background

Along with the development of battery technology and the technical of charging pile, the demand of filling soon is more and more important, and the demand to the heavy current in the module is also more urgent. At present, in the connection structure of electric core module, the busbar is equipped with the utmost point ear that is used for electric core utmost point ear to pass and passes the hole, and electric core utmost point ear passes the utmost point ear and passes the laminating busbar of bending behind the hole, then buckles laminating part and busbar fixed connection with utmost point ear again. Therefore, with the existing connection structure, tab through holes must be formed in the bus bars, which results in the reduction of the flow area of the bus bars and the reduction of the flow capacity of the bus bars.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects or shortcomings in the prior art, the utility model provides a connection structure of a battery cell module, the battery cell module and a battery. The connection mechanism through this electricity core module can guarantee the current capacity of busbar, promotes the current capacity of electricity core module.

In order to achieve the above object, a first aspect of the present invention provides a connection structure of a battery cell module, the connection structure including:

the battery cell comprises a battery cell body and a lug connected to the transverse end part of the battery cell body; and

the bus bars are arranged longitudinally and are positioned on the transverse outer sides of the battery cells;

wherein, the tab extends towards the busbar and includes a bending extension plate which can be bent to fit the lateral outer side wall of the busbar.

Optionally, the transverse end of the cell body is formed with a sealing block protruding towards the busbar, and the tab further includes:

the battery cell connecting plate extends out of the sealing block towards the busbar; and

a butting plate is installed and extends out of the transverse end part of the battery cell connecting plate far away from the battery cell body along the longitudinal direction;

wherein, the extension board of buckling stretches out towards the busbar and follows vertical bending to the horizontal lateral wall of laminating busbar from the vertical one end of installation butt joint board.

Optionally, the sealing block makes an angle of no more than 40 ° with the transverse vertical plane.

Optionally, the width of the bent extension sheet is not less than 5 mm.

Optionally, the length of the bent extension plate is not greater than the vertical length of the busbar.

Optionally, the connection structure further includes a tab support plate, and the tab support plate is disposed between the installation abutting plate and the busbar.

Optionally, the bent extension plate is fixedly connected with the lateral outer side wall of the bus bar by welding.

The utility model provides a battery cell module in a second aspect, which comprises the connection structure of the battery cell module.

Optionally, the battery cell module includes the battery cell module unit that sets up along vertical range upon range of, and battery cell module unit includes two electric cores, and the extension plate of buckling in two electric cores is along transversely range upon range of on the horizontal lateral wall of busbar.

The utility model provides a battery in a third aspect, and the battery comprises the battery cell module.

In the connection structure of the battery cell module, the lug is connected to the transverse end part of the battery cell body, the busbar is positioned on the transverse outer side of the battery cell and is longitudinally arranged, the battery cell is connected with the busbar through the lug, and the battery cell module is formed after a plurality of battery cells are connected on the busbar in parallel. Particularly, the lug comprises a bending extension plate which can be bent to the transverse outer side wall of the attached bus bar, so that the lug penetrating holes for penetrating the lug are not required to be formed in the bus bar, and the overcurrent capacity of the bus bar is ensured.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

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

fig. 1 is a schematic structural diagram of a battery cell according to an embodiment of the present invention;

fig. 2 is a partial view of a lateral end of the cell of fig. 1;

fig. 3 is a top view of a lateral end of the cell of fig. 1;

fig. 4 is a schematic structural diagram of a battery cell module according to an embodiment of the present invention;

fig. 5 is a partial view of a lateral end of the cell module of fig. 4.

Description of reference numerals: 10. an electric core; 11. a cell body; 12. a tab; 20. a bus bar; 30. a tab support plate; 111. a sealing block; 121. a cell connecting plate; 122. mounting a butt joint plate; 123. bending extension plate

Detailed Description

The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the utility model, are given by way of illustration and explanation only, not limitation.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the embodiments of the present invention, unless otherwise specified, the use of directional terms such as "upper, lower, top, bottom, lateral, vertical, left, and right" is generally used with respect to the orientation shown in the drawings or the positional relationship of the components with respect to each other in the vertical, or gravitational direction.

The utility model will be described in detail below with reference to exemplary embodiments and with reference to the accompanying drawings.

The embodiment of the utility model provides a connection structure of a battery cell module, which comprises a battery cell 10 and a busbar 20. The battery cell 10 includes a cell body 11 and tabs 12 connected to lateral ends of the cell body 11. The bus bars 20 are arranged in the longitudinal direction and located on the lateral outer sides of the battery cells 10. The tab 12 extends toward the busbar 20 and includes a bent extension plate 123 capable of being bent to fit the lateral outer sidewall of the busbar 20.

As shown in fig. 1, 4 and 5, the tab 12 is a metal conductor that is generally drawn from the cell body 11 to serve as a contact point of the cell 10 during charging and discharging. The bus bar 20 is a bridge element, and functions to connect a plurality of battery cells 10 in the battery cell module in parallel. In this embodiment, the tab 12 is connected at the transverse end of the cell body 11, the busbar 20 is located at the transverse outer side of the cell 10 and is arranged along the longitudinal direction, the cell 10 is connected with the busbar 20 through the tab 12, and a plurality of cells 10 are connected in parallel on the busbar 20 to form a cell module. In particular, the tab 12 includes a bending extension plate 123, and the bending extension plate 123 can be bent to fit the lateral outer side wall of the busbar 20, so that a tab through hole for passing through the tab 12 does not need to be formed in the busbar 20, and the overcurrent capacity of the busbar is ensured.

In addition, compared with the connection mode that the whole tab 12 abuts against the lateral inner side wall of the bus bar 20, the bending extension plate 123 is attached to the lateral outer side wall of the bus bar 20, which is more beneficial for welding equipment to perform welding operation, and the welding quality is easy to ensure. Therefore, in the embodiment of the present invention, the bent extension plate 123 is fixedly connected to the lateral outer side wall of the bus bar 20 by welding, preferably by laser welding.

Further, the transverse end of the cell body 11 is formed with a sealing block 111 protruding toward the busbar 20, and the tab 12 further includes a cell connecting plate 121 and a mounting abutting plate 122. The cell connection plate 121 projects from the sealing block 111 toward the busbar 20. The mounting abutment plate 122 extends longitudinally from a transverse end of the cell connecting plate 121 remote from the cell body 11. The bending extension plate 123 extends from the vertical end of the installation abutting plate 122 toward the bus bar 20 and is bent vertically to be attached to the lateral outer side wall of the bus bar 20.

Specifically, in order to bend and attach the tab 12 to the lateral outer side wall of the busbar 20, the tab 12 is provided in an irregular and irregular configuration. The tab 12 further includes a cell connecting plate 121 and an installation abutting plate 122 besides the bending extending plate 123, the cell connecting plate 121 extends out of the sealing block 111 and then is longitudinally bent to form the installation abutting plate 122, the bending extending plate 123 is arranged at the vertical end of the installation abutting plate 122, and the bending extending plate 123 can be vertically bent to the horizontal outer side wall of the laminating bus bar 20. As shown in fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a battery cell according to an embodiment of the present invention, and fig. 2 is a partial view of a lateral end of the battery cell in fig. 1. As shown in fig. 1, in the illustrated embodiment, the tab 12 on the battery cell 10 is not completely bent, and is in an inverted L shape, although an included angle between the bending extension plate 123 and the installation abutting plate 122 can be adaptively adjusted, so as to ensure that the bending extension plate 123 can be bent to the lateral outer sidewall of the bus bar 20. Fig. 4 is a schematic structural diagram of a cell module according to an embodiment of the utility model, and fig. 5 is a partial view of a transverse end of the cell module in fig. 4, as shown in fig. 4 and 5, in an illustrated embodiment, a bending extension plate 123 is bent and attached to a transverse outer sidewall of a bus bar 20 along a vertical direction.

In addition, the battery cell 10 is a soft package battery cell, and is generally packaged by using an aluminum plastic film, and a sealing block 111 is formed after the opening of the aluminum plastic film is packaged. In this connection structure, the sealing block 111 needs to be bent appropriately, so as to control the relative position between the busbar 20 and the cell body 11, and ensure the size of the cell module. It can be understood that the sealing block 111 is a packaging part of the battery cell 10, and if the bending angle is too large, the packaging part is easily damaged, thereby causing liquid leakage. Therefore, in the embodiment of the present invention, the included angle between the sealing block 111 and the transverse vertical plane is not greater than 40 °, so as to improve the safety of the cell module. It should be noted that, as shown in fig. 3, fig. 3 is a top view of the transverse end portion of the battery cell in fig. 1, and an angle θ in the drawing is an included angle between the sealing block 111 and the transverse vertical plane.

In the embodiment of the present invention, the width of the bent extension plate 123 is not less than 5 mm. Specifically, when the bending extension plate 123 and the bus bar 20 are laser-welded, the width of the bending extension plate 123 is too small, which affects the welding quality, and therefore, in the present embodiment, the width of the bending extension plate 123 is not less than 5 mm.

In addition, the contact area between the bent extension plate 123 and the bus bar 20 affects the charging and discharging of the battery cell 10, and in order to ensure the contact area between the bent extension plate 123 and the bus bar 20, in the embodiment of the present invention, the length of the bent extension plate 123 is not greater than the vertical length of the bus bar 20. If the vertical end of the bent extension plate 123 exceeds the vertical end of the bus bar 20, interference with other external parts may occur. In a state where the bent extension plate 123 is bent to fit the bus bar 20, it is preferable that the vertical end of the bent extension plate 123 is flush with the vertical end of the bus bar 20, that is, the length of the bent extension plate 123 is equal to the vertical length of the bus bar 20.

In the embodiment of the utility model, the connection structure further includes the tab plate 30, and the tab plate 30 is disposed between the mounting abutment plate 122 and the busbar 20.

As shown in fig. 4 and 5, the tab plate 30 is fixedly connected to the busbar 20 and abuts against the lateral inner sidewall of the busbar 20 for supporting the mounting busbar 20, and the mounting abutting plate 122 abuts against the tab plate 30.

The embodiment of the utility model also provides a battery cell module, which comprises the connection structure of the battery cell module. Because this electricity core module has the connection structure of foretell electricity core module, consequently has stronger overcurrent ability, and of course, this electricity core module has all advantages of above-mentioned connection structure, does not do detailed description here.

Further, this electric core module includes along the electric core module unit of vertical range upon range of setting, and electric core module unit includes two electric cores 10, and the extension board 123 that buckles in two electric cores 10 is along transversely range upon range of on the horizontal lateral wall of busbar 20.

Specifically, as shown in fig. 4 and fig. 5, a cell module unit is composed of two battery cells 10, in the cell module unit, the bending extending plate 123 of one of the battery cells is bypassed from the bottom of the bus bar 20 and is bent to the lateral outer sidewall of the laminated bus bar 20, the bending extending plate 123 of the other battery cell is bypassed from the top of the bus bar 20 and is bent to the bending extending plate 123 of the other laminated battery cell, so that the bending extending plates 123 of the two battery cells 10 in the cell module unit are stacked on the lateral outer sidewall of the bus bar 20 in the lateral direction, and thus the cell module unit is stacked vertically to form a cell module.

The embodiment of the utility model also provides a battery, which comprises the battery cell module. Because this battery has foretell electric core module, obviously possesses by above-mentioned electric core module brought all beneficial effects. It is understood that the battery further includes a component interacting with the cell module or independent from the cell module, which is not described in detail herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

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 at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. The utility model provides a connection structure of electricity core module which characterized in that, connection structure includes:

the battery cell (10) comprises a battery cell body (11) and a lug (12) connected to the transverse end part of the battery cell body (11); and

a busbar (20) arranged in a longitudinal direction and located laterally outside the battery cell (10);

the tab (12) extends towards the busbar (20) and comprises a bending extension plate (123) which can be bent to fit with the lateral outer side wall of the busbar (20).

2. The connection structure of the battery cell module according to claim 1, wherein the lateral end of the battery cell body (11) is formed with a sealing block (111) protruding toward the bus bar (20), and the tab (12) further includes:

a cell connection plate (121) protruding from the sealing block (111) towards the busbar (20); and

a mounting abutting plate (122) longitudinally extending from a transverse end of the cell connecting plate (121) away from the cell body (11);

the bending extension plate (123) extends from one vertical end of the installation abutting plate (122) to the bus bar (20) and is vertically bent to be attached to the transverse outer side wall of the bus bar (20).

3. The connection structure of battery cell modules according to claim 2, wherein the sealing block (111) has an angle of not more than 40 ° with a transverse vertical plane.

4. The connection structure of battery cell module of claim 2, characterized in that, the width of the bending extension plate (123) is not less than 5 mm.

5. The connection structure of the battery cell module according to claim 2, wherein the length of the bent extension plate (123) is not greater than the vertical length of the bus bar (20).

6. The connection structure of the battery cell module of claim 2, further comprising a tab support plate (30), wherein the tab support plate (30) is disposed between the mounting abutment plate (122) and the busbar (20).

7. The connection structure of the battery cell module of any one of claims 1 to 6, wherein the bending extension plate (123) is fixedly connected with the lateral outer side wall of the busbar (20) by welding.

8. A battery cell module, characterized in that, battery cell module includes the connection structure of battery cell module of any one of claims 1-7.

9. The battery cell module of claim 8, wherein the battery cell module comprises a battery cell module unit arranged in a longitudinal stack, the battery cell module unit comprises two battery cells (10), and the bending extension plates (123) in the two battery cells (10) are stacked on the lateral outer side wall of the busbar (20) in a lateral direction.

10. A battery, characterized in that, the battery includes the battery cell module of any claim 8-9.