CN218101479U

CN218101479U - Battery pack

Info

Publication number: CN218101479U
Application number: CN202221692556.8U
Authority: CN
Inventors: 杨秋立; 马姜浩; 占杨娇; 安婷; 张鹏
Original assignee: Jiangsu Zenergy Battery Technologies Co Ltd
Current assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-12-20
Anticipated expiration: 2032-06-30

Abstract

The application provides a battery pack, and relates to the technical field of lithium batteries. The battery pack comprises a battery core module, wherein the battery core module comprises a busbar and a plurality of battery cores, each battery core is provided with a positive output electrode and a negative output electrode, and the positive output electrode comprises a positively charged shell; the multiple battery cells are arranged according to the determinant, and the shells of two adjacent battery cells are connected to realize the parallel connection of the positive electrodes of the multiple battery cells; the busbar is respectively connected with the negative pole posts of the plurality of battery cells, so that the parallel connection of the negative poles of the plurality of battery cells is realized. The shell of the battery cell is designed to be the positive pole, the positive pole connection is realized by connecting the shells, the using number of the bus bars is reduced, and the structure is simpler.

Description

Battery pack

Technical Field

The utility model relates to a lithium electricity technical field particularly, relates to a battery package.

Background

Among the current battery module, the positive pole of a plurality of electric cores is connected through busbar or conducting strip respectively, and the negative pole of a plurality of electric cores is connected through busbar or conducting strip respectively, and rethread switching busbar is connected with other battery modules behind the formation battery module. Although the connecting structure is mature in process and simple in connecting mode, the number of used bus bars is large, the production process is complex, and the cost is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery package, its use quantity that can reduce the busbar, reduce cost simplifies into groups technology, improves efficiency in groups.

The embodiment of the utility model is realized like this:

in a first aspect, the utility model provides a battery pack, including electric core module:

the cell module includes:

each battery cell is provided with a positive electrode output electrode and a negative electrode output electrode, and the positive electrode output electrode comprises a positively charged shell; the battery cells are arranged in a determinant mode, and the shells of two adjacent battery cells are connected to realize the parallel connection of the positive electrodes of the battery cells;

and the bus bar is respectively connected with the plurality of negative pole columns of the battery cells, so that the parallel connection of the plurality of negative poles of the battery cells is realized.

In an optional embodiment, the battery cell module further includes a plurality of connecting portions, two adjacent battery cell modules are connected by the connecting portions, one end of each connecting portion is electrically connected to the bus bar, and the other end of each connecting portion is electrically connected to the positive output electrode in the adjacent battery cell module.

In an optional embodiment, the connection portion includes a connection lug, one end of the connection lug is electrically connected to the bus bar, and the other end of the connection lug is electrically connected to the positive output electrode in the adjacent cell module.

In an alternative embodiment, the connection portion includes a first segment and a second segment connected to each other, the first segment being electrically connected to the bus bar, and the second segment being electrically connected to the positive output pole in the adjacent cell module.

In an alternative embodiment, the first and second segments are angularly disposed.

In an optional embodiment, two adjacent battery cell modules are arranged at an interval, and the interval distance is greater than a preset distance.

In an optional embodiment, the battery pack further comprises a bracket, and the plurality of battery cells are fixed on the bracket.

In an optional embodiment, the bottom of the bracket is provided with a plurality of limiting grooves, and each battery cell is arranged in one limiting groove.

In an optional embodiment, the battery cell is fixed to the bracket in an adhesion manner.

In an optional embodiment, the positive output electrode further includes a positive post electrically connected to the housing, the negative output electrode includes a negative post, the positive post and the negative post of the battery cell are disposed at the same end, and the positive post and the negative post are disposed at an interval.

The embodiment of the utility model provides a beneficial effect of battery package is:

the embodiment of the utility model provides a battery pack through the negative pole post connection of busbar and each electric core, realizes that the negative pole of a plurality of electric cores is parallelly connected. With electric core casing design for anodal, when closely arranging a plurality of electric cores, the casing contact of two adjacent electric cores realizes the electricity of casing and connects, and a plurality of electric cores pass through the casing promptly and realize that anodal is parallelly connected, like this, can omit the use of anodal busbar, reduces the use quantity of busbar, and technology is simpler, and efficiency is higher in groups.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a first battery pack according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a battery cell provided in an embodiment of the present invention;

fig. 3 is a schematic view of a first connection structure of a connection portion according to an embodiment of the present invention;

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

fig. 5 is a schematic view of a second connection structure of a connection portion according to an embodiment of the present invention;

fig. 6 is a schematic diagram of another view angle of the battery pack according to the embodiment of the present invention;

fig. 7 is a schematic structural diagram of a bracket of a battery pack according to an embodiment of the present invention.

An icon: 100-a battery pack; 110-electric core; 111-positive pole column; 113-negative pole column; 115-a housing; 117-isolation trenches; 130-a busbar; 131-a busbar body; 133-connecting piece; 150-a connecting portion; 151-engaging lugs; 153-first segment; 155-a second section; 160-a scaffold; 161-limiting groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 as a specific case by those skilled in the art.

Referring to fig. 1 to 5, the present embodiment provides a battery pack 100, which includes a battery cell module, where the battery cell module realizes parallel connection of cathodes of a plurality of battery cells 110 through a busbar 130, and realizes parallel connection of anodes of the plurality of battery cells 110 through a casing 115 of the battery cells 110, so as to omit use of a positive busbar, thereby greatly reducing use number and types of busbars in the battery pack 100, and the battery pack 100 has a simpler structure, higher grouping efficiency, a more convenient process, and a lower cost.

The cell module includes a bus bar 130 and a plurality of cells 110, where each cell 110 is provided with a positive output electrode and a negative output electrode, and the positive output electrode includes a positively charged casing 115, that is, the casing 115 of each cell 110 is made of a conductive material and is positively charged; the plurality of battery cells 110 are arranged in a determinant, and the housings 115 of two adjacent battery cells 110 are connected to realize parallel connection of the positive electrodes of the plurality of battery cells 110.

Optionally, the battery cell 110 may be a cylindrical battery cell or a square battery cell, where the battery cell 110 includes two end surfaces and a cylindrical side surface, where the two end surfaces are opposite to each other, that is, a top surface and a bottom surface. The positive output pole further comprises a positive pole 111 electrically connected with the shell 115, the positive output pole comprises a negative pole 113, the positive pole 111 and the negative pole 113 are both arranged on the top surface of the battery cell 110, namely, the positive pole 111 and the negative pole 113 of the battery cell 110 are arranged at the same end, and the positive pole 111 and the negative pole 113 are arranged at intervals. The top surface of the battery cell 110 is provided with an isolation groove 117, the positive pole 111 and the negative pole 113 are respectively located at two sides of the isolation groove 117, and the isolation groove 117 is used for isolating the positive pole 111 from the negative pole 113 to avoid short circuit. In some embodiments, the positive post 111 may be omitted.

The housing 115 is disposed on the cylindrical side. In this embodiment, the casing 115 is positively charged, that is, the casing 115 is electrically connected to the positive post 111 of the battery cell 110, and the casing 115 may serve as a positive electrode of the battery cell 110. After the plurality of battery cells 110 are arranged closely according to the determinant, the shells 115 of the adjacent battery cells 110 are connected, that is, the positive electrodes of the plurality of battery cells 110 are connected in parallel, and the shells 115 of the battery cells 110 serve as a positive electrode bus bar. Optionally, the housing 115 is made of metal, including but not limited to aluminum or steel.

The bus bar 130 is electrically connected to the negative poles 113 of the plurality of battery cells 110, respectively, so as to implement parallel connection of the negative poles of the plurality of battery cells 110. In this embodiment, the bus bar 130 is disposed on the top surface of the battery cells 110, and is welded to the negative pole posts 113 of the battery cells 110, respectively, so as to implement parallel connection of the negative poles of the battery cells 110.

Therefore, in one battery cell module, only the bus bar 130 is needed, the design of the positive bus bar is not needed, the use number and the variety of the bus bar are reduced, and the cost is lower. And through the inseparable range of electric core 110, meet through casing 115 and to realize the parallelly connected of a plurality of electric core 110 anodals, the technology is simpler, and the operation is more convenient, and it is higher to become group efficiency.

The battery pack 100 further includes a plurality of connecting portions 150, the number of the battery cell modules includes a plurality of adjacent battery cell modules, two adjacent battery cell modules are connected in series through the connecting portions 150, one end of each connecting portion 150 is electrically connected to the busbar 130, and the other end of each connecting portion is electrically connected to the housing 115 or the positive post 111 of the adjacent battery cell module.

Optionally, with reference to fig. 1 and fig. 2, the connection portion 150 includes a connection lug 151, one end of the connection lug 151 is electrically connected to the bus bar 130, and the other end is electrically connected to the positive electrode output electrode in the adjacent cell module. That is, the end of the connecting lug 151 away from the bus bar 130 is electrically connected to the positive post 111 or the housing 115. This achieves a series connection of adjacent cell modules. It is understood that the connecting lug 151 may be integrally formed with the bus bar 130 or may be separately connected to the bus bar 130, and may be connected to any position of the bus bar 130, which is not particularly limited herein. It is easy to understand that at least one of the positive post 111 and the housing 115 may be electrically connected to an end of the connection lug 151 away from the bus bar 130.

Further, the bus bar 130 includes a bus bar body 131 and a connecting piece 133 disposed on one side of the bus bar body 131, the bus bar body 131 is electrically connected to the connecting piece 133, and a plurality of connecting pieces 133 may be connected to the negative poles 113 of the plurality of battery cells 110 at the same time. The connecting lug 151 is disposed on a side of the bus bar body 131 away from the connecting piece 133, and the connecting lug 151 may be disposed at an end portion or a middle portion or any position of the bus bar body 131.

Optionally, the connection lug 151 may be connected to the positive post 111 of the battery cell 110 by welding, so as to electrically connect the connection lug 151 and the positive post 111.

With reference to fig. 3 and 4, an application of another structure of the connection part 150 is shown. The connection part 150 includes a first section 153 and a second section 155 connected to each other, the first section 153 being electrically connected to the bus bar 130, and the second section 155 being electrically connected to the positive electrode output electrode in the adjacent cell module. Alternatively, at least one of the positive post 111 and the housing 115 may be electrically connected to an end of the second section 155 distal from the first section 153. In this embodiment, since the bus bar 130 is disposed on the top surface of the electric core 110, and the connection portion 150 needs to be connected to the casing 115 of the electric core 110, that is, connected to the side surface of the electric core 110, the connection portion 150 is disposed to be inclined along a straight line or bent along a folding line, or may be disposed in an arc line or an irregular curve.

In the present embodiment, for example, the first segment 153 and the second segment 155 are disposed at an angle, and may be disposed at an acute angle, a right angle, or an obtuse angle. Optionally, the first segment 153 and the second segment 155 are disposed at an angle of about 90 degrees, the first segment 153 is laid along the top surface of the battery cell 110, and the second segment 155 is extended downward (in a direction from the top surface to the bottom surface) and connected to the casing 115 in another battery cell module. In order to make the connection between the second section 155 and the housing 115 more stable and reliable, the second section 155 is provided in an arc shape, which can better fit on the cylindrical housing 115. The second segment 155 and the housing 115 may be fixed by welding, and the first segment 153 and the bus bar 130 may also be fixed by welding. Of course, in other embodiments, the connecting portion 150 and the bus bar 130 may be integrally formed.

It is easy to understand that the connecting portion 150 is used to realize the series connection of two battery cell modules, and the shape and size of the connecting portion 150 are not limited as long as the two can be electrically connected, and a metal wire connection mode or the like can also be directly adopted. Moreover, the connection portion 150 and the bus bar 130 are flexibly disposed, and the connection portion 150 may be connected to the casing 115 of the next battery cell module through the bus bar 130 of the previous battery cell module, or may be connected to the bus bar 130 of the next battery cell module through the casing 115 of the previous battery cell module. Therefore, the connection space of the bus bar 130 is not limited, and meanwhile, the side space of the cylindrical battery cell 110 is effectively utilized, so that different series-parallel connection modes can be formed, and the arrangement is flexible.

Referring to fig. 6, since the casing 115 is positively charged, the cell modules in the battery pack 100 need to be connected in series, and in order to avoid the case 115 between adjacent cell modules being connected in parallel, two adjacent cell modules need to be spaced apart from each other, and the spacing distance is N and is greater than the preset distance. Optionally, a spacing distance N between two adjacent cell modules is greater than 1 millimeter. Of course, the spacing distance can be flexibly adjusted according to practical situations, for example, the preset distance can be 0.5 mm, 0.8 mm, 1.5 mm or 2 mm.

Referring to fig. 7, the battery pack 100 further includes a bracket 160, and the plurality of battery cells 110 are fixed on the bracket 160. Optionally, the bottom surface of the battery cell 110 is used for being connected with the bracket 160, and the bracket 160 can protect the battery cell 110, and meanwhile, is convenient for fixing the battery cell 110, and is beneficial to the group forming of the battery pack 100.

Optionally, the bottom of the bracket 160 is provided with a plurality of limiting grooves 161, each battery cell 110 is arranged in one limiting groove 161, and the size of the limiting groove 161 is adapted to the size of the battery cell 110, so as to achieve a limiting and fixing effect. Alternatively, the battery cell 110 and the bracket 160 may be fixed by bonding, for example, by filling structural adhesive to fix the battery cell 110 on the bracket 160. Of course, structural adhesive may also be added in the limiting groove 161 to further keep the battery cell 110 fixed in position, which is not limited herein.

Optionally, a through hole is formed in the bottom of the limiting groove 161, which is helpful for heat dissipation of the cell module.

The embodiment of the utility model provides a battery pack 100, electric core 110 are fixed on support 160, and electric core 110's bottom surface is connected with support 160, and electric core 110's top surface up, busbar 130 set up at electric core 110's top surface, and busbar 130 is connected with a plurality of electric core 110's negative pole post 113 respectively, realizes that a plurality of electric core 110's negative pole is parallelly connected. The casing 115 of the battery cell 110 is positively charged, the battery cells 110 are closely arranged, the casings 115 of the adjacent battery cells 110 are in contact, the parallel connection of the positive electrodes of the battery cells 110 is realized, and the casing 115 on the side surface of the battery cell 110 serves as a positive bus bar, so that the positive bus bar is not required to be adopted in the battery cell module. The adjacent cell modules are arranged at intervals, and the connection between the cell modules is realized through the connecting part 150.

To sum up, the embodiment of the present invention provides a battery pack 100, which has the following beneficial effects:

the embodiment of the utility model provides a battery pack 100 is connected through busbar 130 and the negative pole post 113 of each electric core 110, realizes that a plurality of electric cores 110's negative pole is parallelly connected. Design electric core 110 casing 115 as positively charged, can regard as electric core 110's positive pole, when closely arranging a plurality of electric cores 110, the casing 115 contact of two adjacent electric cores 110, realize casing 115's electricity and connect, a plurality of electric cores 110 realize through casing 115 that the positive pole is parallelly connected promptly, and like this, can omit the use of anodal busbar, also can reduce the use of switching row, reduce the use quantity and the kind of busbar, and the technology is simpler, it is higher to organize efficiency, can reduce manufacturing cost by a wide margin, and improve production efficiency.

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. The battery pack is characterized by comprising a battery cell module:

the cell module includes:

the battery comprises a plurality of battery cells (110), each battery cell (110) is provided with a positive output electrode and a negative output electrode, the positive output electrode comprises a positively charged shell (115), the battery cells (110) are arranged in a determinant, the shells (115) of two adjacent battery cells (110) are connected, and the parallel connection of the positive electrodes of the battery cells (110) is realized;

and the bus bar (130) is electrically connected with the negative electrode output electrodes of the plurality of battery cells (110) respectively, so that the negative electrodes of the plurality of battery cells (110) are connected in parallel.

2. The battery pack according to claim 1, further comprising a connecting portion (150);

the number of the battery cell modules comprises a plurality of adjacent battery cell modules, the adjacent battery cell modules are connected through the connecting portion (150), one end of the connecting portion (150) is electrically connected with the busbar (130), and the other end of the connecting portion is electrically connected with the adjacent positive electrode output electrode in the battery cell modules.

3. The battery pack according to claim 2, wherein the connection part (150) includes a connection lug (151), and one end of the connection lug (151) is electrically connected to the bus bar (130) and the other end is electrically connected to the positive output pole in the adjacent cell module.

4. The battery pack of claim 2, wherein the connection (150) comprises a first segment (153) and a second segment (155) connected to each other, the first segment (153) being electrically connected to the buss bar (130), the second segment (155) being electrically connected to the positive output electrode in the adjacent cell module.

5. The battery pack of claim 4, wherein the first segment (153) and the second segment (155) are angularly disposed.

6. The battery pack of claim 1, wherein two adjacent cell modules are spaced apart from each other by a distance greater than a predetermined distance.

7. The battery pack of claim 1, further comprising a bracket (160), wherein the plurality of cells (110) are secured to the bracket (160).

8. The battery pack according to claim 7, wherein a plurality of limiting grooves (161) are formed in the bottom of the bracket (160), and each of the battery cells (110) is disposed in one of the limiting grooves (161).

9. The battery pack of claim 7, wherein the battery cell (110) is adhesively secured to the bracket (160).

10. The battery pack according to any one of claims 1 to 9, wherein the positive output electrode further comprises a positive post (111) electrically connected to the housing (115), and the negative output electrode comprises a negative post (113), the positive post (111) and the negative post (113) are disposed at the same end, and the positive post (111) and the negative post (113) are disposed at an interval.