CN216213825U

CN216213825U - Battery module

Info

Publication number: CN216213825U
Application number: CN202121832472.5U
Authority: CN
Inventors: 李俊; 汪睿; 郑司根
Original assignee: Sungrow Power Supply Co Ltd
Current assignee: Sungrow Power Supply Co Ltd
Priority date: 2021-08-06
Filing date: 2021-08-06
Publication date: 2022-04-05
Anticipated expiration: 2031-08-06

Abstract

The utility model relates to the technical field of batteries and discloses a battery module. This battery module includes drain pan and top cap, drain pan and top cap enclose into airtight space, be provided with the annular groove on one of them in drain pan and the top cap, be provided with on another in drain pan and the top cap and peg graft complex annular arch with the annular groove, it is equipped with the sealing washer to press from both sides between annular groove and the annular arch, the circumference edge of drain pan and top cap links to each other through a plurality of fasteners, a plurality of fasteners are located annular groove and the bellied outside of annular, thereby separate fastener and annular groove and the bellied cooperation department of annular, it is relatively poor to have solved fastener fastening department leakproofness, very easily cause the problem that the battery module intake, the leakproofness of battery module has been improved, prevent that the battery module from intaking, thereby the security of battery module is improved.

Description

Battery module

Technical Field

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

Background

Along with new forms of energy economy development, portable power source's demand is increasing day by day, and the battery module is as the assembly that can directly provide the electric energy, and the application is also more and more extensive. In the application process, the waterproof performance is an important factor influencing the safety of the battery module. At present, battery module on the market includes top cap and drain pan, carries out fastening connection through the bolt between top cap and the drain pan, though the junction at top cap and drain pan is provided with the sealing washer usually, but bolt-up department leakproofness is relatively poor, very easily causes battery module to intake, has huge potential safety hazard.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a battery module, which solves the problems that the sealing performance of the bolt fastening part of a top cover and a bottom shell of the existing battery module is poor, and the battery module is easy to enter water to cause potential safety hazards.

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

a battery module comprises a bottom shell and a top cover, wherein the bottom shell and the top cover enclose a closed space, one of the bottom shell and the top cover is provided with an annular groove, the other of the bottom shell and the top cover is provided with an annular bulge in plug fit with the annular groove, and a sealing ring is clamped between the annular groove and the annular bulge;

the peripheral edges of the bottom shell and the top cover are connected by a plurality of fasteners located outside the annular groove and the annular protrusion.

Optionally, the circumference edge of top cap is provided with first flange limit, the circumference edge of drain pan is provided with second flange limit, one of them sets up the annular arch in first flange limit and the second flange limit, another one in first flange limit and the second flange limit sets up the annular groove, be provided with a plurality of first connecting holes on the first flange limit, the correspondence is provided with a plurality of second connecting holes on the second flange limit, first connecting hole and second connecting hole are located the protruding outside with the annular groove of annular, the fastener passes corresponding first connecting hole and second connecting hole to with drain pan and top cap sealing connection.

Optionally, the top cover further comprises a flange, the flange is connected to the outer side of the first flange and perpendicular to the first flange, an accommodating space is defined between the flange and the first flange, and the second flange extends into the accommodating space.

Optionally, a plurality of first protruding structures are disposed on one side of the first flange edge facing the second flange edge, and the first connection hole penetrates through the first protruding structures.

Optionally, a gasket is disposed between the first raised structure and the second flange.

Optionally, one side of the first flange edge facing the second flange edge is provided with a reinforcing rib, and the reinforcing rib is arranged between the two first protruding structures.

Optionally, the reinforcing bar comprises:

the first reinforcing ribs are arranged in parallel with the annular bulges and are connected with the plurality of first bulge structures; and

the second reinforcing ribs are arranged in a crossed mode with the first reinforcing ribs, and the second reinforcing ribs are arranged between the two adjacent first protruding structures at intervals.

Optionally, two annular second protruding structures are arranged on the second flange at intervals, and an annular groove is formed between the two second protruding structures.

Optionally, the plurality of fasteners are evenly disposed along the circumferential edge of the top cover.

Optionally, a first groove is formed in a position, corresponding to the first connecting hole, of one side, deviating from the second flange side, of the first flange side, the fastener is a bolt, and a screw head of the bolt is sunk into the first groove.

The utility model has the beneficial effects that:

according to the battery module, the bottom shell and the top cover form a closed space, one of the bottom shell and the top cover is provided with the annular groove, the other one of the bottom shell and the top cover is provided with the annular bulge matched with the annular groove in an inserted mode, the sealing ring is clamped between the annular groove and the annular bulge, the circumferential edges of the bottom shell and the top cover are connected through the plurality of fastening pieces, the plurality of fastening pieces are located on the outer sides of the annular groove and the annular bulge, the fastening pieces are separated from the matching position of the annular groove and the annular bulge, the fastening pieces cannot penetrate through the sealing ring, the problem that the battery module is prone to water inlet due to poor sealing performance of the fastening pieces is solved, the sealing performance of the battery module is improved, the battery module is prevented from water inlet, and the safety of the battery module is improved.

Drawings

Fig. 1 is a schematic view of an overall structure of a battery module according to the present invention;

fig. 2 is a schematic partial structure diagram of a bottom case of a battery module according to the present invention;

fig. 3 is a partial structural view of a top cover of a battery module according to the present invention.

In the figure:

1. a bottom case; 11. an annular groove; 111. a second bump structure; 12. a second flanged edge; 121. a second connection hole;

2. a top cover; 21. an annular projection; 22. a first flanged edge; 221. a first groove; 23. blocking edges; 24. a first bump structure; 241. a first connection hole; 25. reinforcing ribs; 251. a first reinforcing rib; 252. and a second reinforcing rib.

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", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Battery module on the present market includes top cap and drain pan, and top cap and drain pan enclose into the accommodation space who holds battery module, carry out fastening connection through the bolt between top cap and the drain pan, though be provided with the sealing washer in the junction of top cap and drain pan usually, but the bolt pierces through the sealing washer, and it is relatively poor to lead to bolt-up department leakproofness, very easily causes battery module to intake, has huge potential safety hazard.

In order to solve the above problem, as shown in fig. 1, this embodiment provides a battery module, which includes a bottom case 1 and a top cover 2, where the bottom case 1 and the top cover 2 enclose an enclosed space, an annular groove 11 is provided on the bottom case 1, an annular protrusion 21 that is in plug-in fit with the annular groove 11 is provided on the top cover 2, a sealing ring is interposed between the annular groove 11 and the annular protrusion 21, circumferential edges of the bottom case 1 and the top cover 2 are connected through a plurality of fasteners, and the plurality of fasteners are located outside the annular groove 11 and the annular protrusion 21. The annular bulge 21 is in inserted fit with the annular groove 11, so that the sealing ring between the annular groove 11 and the annular bulge 21 is pressed tightly, and a good sealing and waterproof effect is achieved; moreover, the fastener is arranged on the outer sides of the annular groove 11 and the annular bulge 21 and does not penetrate through the sealing ring, so that the sealing ring is effectively prevented from being damaged by the fastener, and the sealing and waterproof performance of the sealing ring is guaranteed. It should be noted that, in other embodiments, the annular groove 11 may be disposed on the top cover 2, and the annular protrusion 21 that is inserted into and matched with the annular groove 11 is disposed on the bottom shell 1, so that a better sealing and waterproof effect can be achieved.

Preferably, the plurality of fastening members are uniformly arranged along the circumferential edge of the top cover 2 so that the coupling of the top cover 2 and the bottom case 1 is uniformly stressed.

Further, as shown in fig. 2 and 3, a first flange 22 is provided at a circumferential edge of the top cover 2, the annular protrusion 21 is provided on the first flange 22, a second flange 12 is provided at a circumferential edge of the bottom cover 1, the annular groove 11 is provided on the second flange 12, in addition, a plurality of first connection holes 241 are provided on the first flange 22, a plurality of second connection holes 121 are correspondingly provided on the second flange 12, the first connection holes 241 and the second connection holes 121 are located at outer sides of the annular protrusion 21 and the annular groove 11, and the fastening member passes through the corresponding first connection holes 241 and the corresponding second connection holes 121 to hermetically connect the bottom cover 1 and the top cover 2.

Optionally, as shown in fig. 2, two annular second protruding structures 111 are arranged on the second flange 12 at intervals, an annular groove 11 is formed between the two second protruding structures 111, the arrangement manner of the annular groove 11 is simple, and the processing is quick and convenient.

In order to enhance the waterproof effect, as shown in fig. 3, the top cover 2 further includes a rib 23, the rib 23 is connected to the outer side of the first flange 22 and perpendicular to the first flange 22, a receiving space is defined between the rib 23 and the first flange 22, and the second flange 12 extends into the receiving space. The rib 23 shields the annular protrusion 21, the annular groove 11 and the fastening member to prevent a lateral water flow from entering the battery module, thereby enhancing the waterproof performance of the battery module.

Preferably, as shown in fig. 3, a plurality of first protruding structures 24 are disposed on a side of the first flange 22 facing the second flange 12, and the first connection holes 241 penetrate the first protruding structures 24. When the top cover 2 and the bottom shell 1 are covered, the first protruding structures 24 abut against the second flange 12, so that the connection between the top cover 2 and the bottom shell 1 is firmer.

Preferably, a gasket is arranged between the first protruding structure 24 and the second flange edge 12, the contact position of the first protruding structure 24 and the second flange edge 12 is isolated and protected, abrasion caused by direct contact of the first protruding structure and the second flange edge is prevented, and the gasket is preferably made of waterproof glue and can prevent water from entering the joint of the fastening piece.

For the sake of beauty and protection, a first groove 221 is formed in the position, corresponding to the first connection hole 241, of one side, away from the second flange edge 12, of the first flange edge 22, the fastener is a bolt, the screw head of the bolt is sunk into the first groove 221, the screw head can be effectively prevented from being damaged by external force, and meanwhile, the overall structure of the battery module is attractive in appearance.

Preferably, as shown in fig. 3, the side of the first flange 22 facing the second flange 12 is provided with a rib 25, and the rib 25 is disposed between the two first protrusion structures 24 to enhance the strength of the first flange and assist the first protrusion structures 24 to further compress the sealing ring between the annular protrusion 21 and the annular groove 11.

Specifically, the reinforcing ribs 25 comprise first reinforcing ribs 251 and second reinforcing ribs 252, the first reinforcing ribs 251 and the annular protrusions 21 are arranged in parallel, the first reinforcing ribs 251 are connected with the first protrusion structures 24, the second reinforcing ribs 252 and the first reinforcing ribs 251 are arranged in a crossed mode, and the second reinforcing ribs 252 are arranged between the two adjacent first protrusion structures 24 at intervals. In this embodiment, the first reinforcing bead 251 and the second reinforcing bead 252 are vertically disposed.

The installation process comprises the following steps:

firstly, the bottom shell 1 and the top cover 2 are covered, so that the annular bulge 21 is inserted into the annular groove 11 and clamps the sealing ring;

then, bolts are inserted through the first connection holes 241 of the top cover 2 and the second connection holes 121 of the bottom case 1 to securely connect the top cover 2 and the bottom case 1.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the utility model. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The battery module is characterized by comprising a bottom shell (1) and a top cover (2), wherein a closed space is enclosed by the bottom shell (1) and the top cover (2), one of the bottom shell (1) and the top cover (2) is provided with an annular groove (11), the other of the bottom shell (1) and the top cover (2) is provided with an annular bulge (21) which is in plug-in fit with the annular groove (11), and a sealing ring is clamped between the annular groove (11) and the annular bulge (21);

the peripheral edges of the bottom shell (1) and the top cover (2) are connected by a plurality of fasteners located outside the annular groove (11) and the annular protrusion (21).

2. The battery module according to claim 1, wherein a circumferential edge of the top cover (2) is provided with a first flange rim (22), a circumferential edge of the bottom cover (1) is provided with a second flange rim (12), one of the first flange rim (22) and the second flange rim (12) is provided with the annular protrusion (21), the other of the first flange rim (22) and the second flange rim (12) is provided with the annular groove (11), the first flange rim (22) is provided with a plurality of first connection holes (241), the second flange rim (12) is correspondingly provided with a plurality of second connection holes (121), the first connection holes (241) and the second connection holes (121) are located outside the annular protrusion (21) and the annular groove (11), and the fasteners pass through the corresponding first connection holes (241) and second connection holes (121), so as to connect the bottom shell (1) and the top cover (2) in a sealing way.

3. The battery module according to claim 2, wherein the top cover (2) further comprises a rib (23), the rib (23) is connected to the outer side of the first flange (22) and perpendicular to the first flange (22), a receiving space is defined between the rib (23) and the first flange (22), and the second flange (12) extends into the receiving space.

4. The battery module according to claim 2, wherein the first flange (22) is provided with a plurality of first protrusion structures (24) on a side thereof facing the second flange (12), and the first connection holes (241) penetrate the first protrusion structures (24).

5. The battery module according to claim 4, wherein a gasket is provided between the first projection structure (24) and the second flange (12).

6. The battery module according to claim 4, wherein the first flange edge (22) is provided with a bead (25) on the side facing the second flange edge (12), and the bead (25) is arranged between the two first raised structures (24).

7. The battery module according to claim 6, wherein the reinforcing rib (25) comprises:

a first bead (251) disposed parallel to the annular protrusion (21), the first bead (251) connecting a plurality of the first protrusion structures (24); and

and the second reinforcing ribs (252) are arranged in a crossed manner with the first reinforcing ribs (251), and a plurality of second reinforcing ribs (252) are arranged between two adjacent first protruding structures (24) at intervals.

8. The battery module according to any one of claims 2-7, wherein the second flange edge (12) is provided with two annular second raised structures (111) at intervals, and the annular groove (11) is formed between the two second raised structures (111).

9. The battery module according to any one of claims 1 to 7, wherein a plurality of the fasteners are uniformly arranged along the circumferential edge of the top cover (2).

10. The battery module according to any one of claims 2 to 7, characterized in that a side of the first flange edge (22) facing away from the second flange edge (12) is provided with a first groove (221) corresponding to the position of the first connection hole (241), and the fastening member is a bolt, the head of which is sunk into the first groove (221).