CN215896621U

CN215896621U - Battery module and battery pack

Info

Publication number: CN215896621U
Application number: CN202122252814.2U
Authority: CN
Inventors: 孙中伟; 胡超
Original assignee: Shenzhen Hello Tech Energy Co Ltd
Current assignee: Shenzhen Hello Tech Energy Co Ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2022-02-22
Anticipated expiration: 2031-09-16

Abstract

The utility model relates to the technical field of batteries and discloses a battery module and a battery pack. The battery module includes a plurality of battery module units and a plurality of tabs. The battery module unit is provided with a bus bar, two ends of the connecting sheet are connected to the bus bar on the adjacent two battery module units respectively, welding openings are formed in two ends of the connecting sheet respectively, the welding openings correspond to the bus bar, and the welding openings are connected with the bus bar in a welded mode. This battery package includes foretell battery module, can strengthen the fastening effect under the electrical property decay condition not influencing, reduces the fault rate, improves the rate of utilization.

Description

Battery module and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery module and a battery pack.

Background

The current battery module superposes and adopts artifical mode locking more, and electric core impedance can crescent in the use, and is required for its electrical property higher, consequently requires higher to the inside stability of battery module. The existing battery module is single in fixing mode, and after the battery module is used for a long time, the battery module is easy to loosen and even disconnect. And the battery package is often used for outdoor scene or adjacent water region, often need move the collision, if the internal connection is insecure, the electrical property decay condition can appear to the battery module to influence the life of battery package.

SUMMERY OF THE UTILITY MODEL

Based on the above, the present invention provides a battery module and a battery pack, which can enhance the fastening effect without affecting the electrical performance degradation, reduce the failure rate, and improve the service life.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a battery module, comprising:

the battery module units are provided with bus bars;

the two ends of the connecting piece are respectively connected to the bus bars on the adjacent two battery module units, welding openings are respectively formed in the two ends of the connecting piece, the welding openings correspond to the bus bars, and the welding openings are connected with the bus bars in a welded mode.

As a preferable mode of the battery module, the welding opening and the bus bar are welded by soldering.

As a preferable aspect of the battery module, the welding opening has an arc shape, a rectangular shape, or a circular shape.

As a preferable aspect of the battery module, the battery module further includes:

the fixing piece is connected between the bus bar and the connecting piece, a connecting opening is formed in the fixing piece, and the connecting opening corresponds to the welding opening.

As a preferred scheme of battery module, the battery module unit sets up in the support, the busbar is located the outside of support, the connection piece is fixed in through a plurality of connecting pieces the support.

As a preferred scheme of the battery module, a plurality of first connecting holes are formed in the support, a plurality of second connecting holes are formed in two ends of the connecting piece respectively, a plurality of third connecting holes are formed in the bus bar, the first connecting holes, the second connecting holes and the third connecting holes are arranged in a one-to-one correspondence manner, and each connecting piece sequentially penetrates through one third connecting hole, one second connecting hole and one first connecting hole.

As a preferable aspect of the battery module, the connection member includes a spring washer screw.

As a preferred scheme of the battery module, a plurality of heat dissipation holes are formed in the connecting sheet.

As a preferable mode of the battery module, the connecting sheet is made of a metal material, and the connecting sheet is flat.

A battery pack comprises the battery module of any one of the above technical schemes.

The utility model has the beneficial effects that:

the utility model provides a battery module and a battery pack, wherein the battery module comprises a plurality of battery module units and a plurality of connecting sheets, two ends of each connecting sheet are respectively connected to bus bars on two adjacent battery module units, and the battery module units are electrically connected through the connecting sheets. And welding openings are respectively formed at two ends of the connecting sheet, correspond to the bus bars and are connected through welding. Under the structure, the impedance effect of the electrical property can be reduced, and the structure can be ensured not to have attenuation on the electrical property. The connecting sheet is connected with the bus bar and fixed by welding, and the connecting sheet has double fixing protection. When a problem occurs at the connection position of the connecting sheet and the bus bar, the connection between the battery module units is not broken due to the welding firmness; when the welding part has a problem, the connection between the battery module units can be ensured at the connection part of the connecting sheet and the bus bar, so that the failure rate of the battery module and the battery pack is reduced, and the service life of the battery module and the battery pack is prolonged. Meanwhile, the welding opening is convenient to weld, the welding precision is improved, and the working efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic structural view of a battery module unit and a connecting sheet according to an embodiment of the present invention when the battery module unit and the connecting sheet are not assembled;

fig. 2 is a front view of the completed assembly of the battery module unit and the connection tabs according to the embodiment of the present invention.

In the figure:

1. a battery module unit; 2. a bus bar; 3. connecting sheets; 4. a fixing sheet; 5. a support; 6. a connecting member; 10. welding an opening; 20. a connection opening; 30. and (4) heat dissipation holes.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

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.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 and 2, the present embodiment provides a battery module including a plurality of battery module units 1 and a plurality of tabs 3. Be provided with busbar 2 on the battery module unit 1, the both ends of connection piece 3 are connected respectively in busbar 2 on two adjacent battery module units 1, and welding opening 10 has been seted up respectively at the both ends of connection piece 3, and welding opening 10 corresponds busbar 2 setting, welding opening 10 and busbar 2 welded connection. Welding openings 10 are respectively formed in two ends of the connecting sheet 3, and the welding openings 10 are arranged corresponding to the bus bars 2 and connected through welding. Under the structure, the impedance effect of the electrical property can be reduced, and the structure can be ensured not to have attenuation on the electrical property. That is, the connecting piece 3 is connected with the bus bar 2 and fixed by welding, and the connecting piece 3 has double fixing protection. When a problem occurs at the connection position of the connecting sheet 3 and the bus bar 2, the connection between the battery module units 1 is not broken due to the welding firmness; when the welding part has problems, the connection between the battery module units 1 can be ensured at the connection part of the connecting sheet 3 and the bus bar 2, so that the failure rate of the battery module and the battery pack is reduced, and the utilization rate of the battery module and the battery pack is improved. Meanwhile, the welding opening 10 is convenient to weld, welding precision is improved, and working efficiency is improved.

In this embodiment, a plurality of welding openings 10 have been seted up respectively at the both ends of connection piece 3, and a plurality of welding openings 10 interval and even setting improve connection stability.

In this embodiment, the connecting sheet 3 is made of a metal material, so that the battery module units 1 are electrically communicated with each other, the heat conduction effect is good, the heat dissipation of the battery module is facilitated, and the service life of the battery module is prolonged. Alternatively, the connecting piece 3 may be made of a copper sheet or an aluminum sheet.

Preferably, the welding opening 10 and the bus bar 2 are welded by soldering. The melting temperature of tin soldering is 180-320 ℃, and the tin soldering has good weldability for metal materials such as copper and the like; the cost is low, welding spots are easy to form, and the welding method is simple and convenient; meanwhile, soldering is easy to realize welding automation, and production efficiency is improved. More preferably, laser soldering is used. The laser soldering only heats the connecting part locally, and has no thermal influence on the component body, so that the yield and the production efficiency of finished products can be improved.

Further, the battery module still includes stationary blade 4, and stationary blade 4 is connected between busbar 2 and connection piece 3, has seted up connection opening 20 on stationary blade 4, and connection opening 20 corresponds welding opening 10 and sets up. The fixing piece 4 is used for fixing and compressing the bus bar 2, so that the bus bar 2 is prevented from being bent and deformed, and the damage and even the short circuit are caused. The attachment opening 20 on the fixing piece 4 facilitates welding of the bus bar 2 and the welding opening 10 on the attachment piece 3. Preferably, the attachment opening 20 on the attachment tab 4 and the weld opening 10 on the attachment tab 3 are the same size to facilitate alignment of the attachment tab 3 with the attachment tab 4 during installation and to facilitate welding of the attachment tab 3.

Alternatively, the welding opening 10 and the connection opening 20 may be arc-shaped, rectangular, circular, or the like. Of course, in other embodiments, the weld opening 10 and the connection opening 20 may have other shapes.

Further, the battery module unit 1 is disposed in the bracket 5, the bus bar 2 is located outside the bracket 5, and the connecting sheet 3 is fixed to the bracket 5 by a plurality of connecting members 6. Specifically, a plurality of first connecting holes are formed in the support 5, a plurality of second connecting holes are formed in the two ends of the connecting piece 3 respectively, a plurality of third connecting holes are formed in the bus bar 2, the first connecting holes, the second connecting holes and the third connecting holes are arranged in a one-to-one correspondence mode, and each connecting piece 6 penetrates through one third connecting hole, one second connecting hole and one first connecting hole in sequence. The connecting piece 6 is preferably an elastic cushion screw so as to have good anti-loosening and anti-vibration effects and further improve the stability of the battery module. Through the screw fixation, fixed effect is better, improves battery module's stability. Through the dual fixed of screw and soldering, guaranteed that battery module applies to open air intensity, it is not fragile in transport and working process.

Preferably, the connecting plate 3 is provided with a plurality of heat dissipation holes 30. The heat dissipation efficiency of the connecting sheet 3 is improved, so that the service life and the safety of the battery module are improved. Meanwhile, the connecting sheet 3 is hollowed out, so that the stability of the connecting sheet 3 can be improved, and materials can be saved.

Preferably, the connecting sheet 3 is flat, has high connection stability, saves space, and improves the specific energy of the battery module.

The embodiment also provides a battery pack, which comprises the battery module. The battery pack is low in failure rate, good in stability and high in safety performance.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A battery module, comprising:

the battery module unit comprises a plurality of battery module units (1), wherein bus bars (2) are arranged on the battery module units (1);

the battery module comprises a plurality of connecting pieces (3), wherein the two ends of each connecting piece (3) are connected to two adjacent battery module units (1) respectively, the bus bars (2) are arranged on the battery module units, welding openings (10) are formed in the two ends of each connecting piece (3) respectively, each welding opening (10) corresponds to one bus bar (2), and each welding opening (10) is connected with the corresponding bus bar (2) in a welded mode.

2. The battery module according to claim 1, characterized in that the welding opening (10) and the bus bar (2) are welded by soldering.

3. The battery module according to claim 1, wherein the welding opening (10) is arc-shaped, rectangular or circular.

4. The battery module according to claim 1, further comprising:

the fixing piece (4) is connected between the bus bar (2) and the connecting piece (3), a connecting opening (20) is formed in the fixing piece (4), and the connecting opening (20) corresponds to the welding opening (10).

5. The battery module according to claim 1, wherein the battery module unit (1) is disposed in a support (5), the bus bar (2) is located outside the support (5), and the connecting tab (3) is fixed to the support (5) by a plurality of connecting pieces (6).

6. The battery module according to claim 5, wherein the bracket (5) is provided with a plurality of first connecting holes, the connecting sheet (3) is provided with a plurality of second connecting holes at two ends thereof, the bus bar (2) is provided with a plurality of third connecting holes, the first connecting holes, the second connecting holes and the third connecting holes are arranged in a one-to-one correspondence manner, and each connecting member (6) is sequentially inserted through one of the third connecting holes, the second connecting holes and the first connecting holes.

7. The battery module according to claim 5, wherein the connecting member (6) comprises a spring washer screw.

8. The battery module according to claim 1, wherein the connecting sheet (3) is provided with a plurality of heat dissipation holes (30).

9. The battery module according to claim 1, wherein the connecting tab (3) is made of a metal material, and the connecting tab (3) is flat.

10. A battery pack comprising the battery module according to any one of claims 1 to 9.