CN218300092U - Battery module and vehicle - Google Patents

Abstract

The utility model relates to the technical field of batteries, a battery module and vehicle is disclosed. Above-mentioned battery module includes electric core and cooling piece, and the cooling piece is arranged in one side of electric core and is fixed with electric core butt, and above-mentioned means makes electric core thermal deformation back, and the cooling piece can play the effect of restriction to the bulging force of electric core, prevents that electric core inflation back battery module from collapsing absolutely, from this, the cooling piece can strengthen battery module intensity as the structure when taking into account the heat transfer effect, and then guarantees the normal use of battery module. Above-mentioned vehicle is through adopting above-mentioned battery module, and battery module's intensity promotes, and then has increased vehicle battery's life.

Description

Battery module and vehicle

Technical Field

The utility model relates to a battery field, in particular to battery module and vehicle.

Background

At present, under the support of the country and the benefit of the market, the power battery industry develops very quickly, and the application of the power battery industry is expanded to the fields of electric buses, electric cars, micro buses, energy storage and the like.

This kind of power battery generally presents with battery module's form, battery module includes electric core, the easy thermal expansion of electric core, deflection is very big in a certain direction, can cause electric core fracture after the electric core inflation for battery module can't normal use, but battery module at present stage is all pursuing high energy density (energy density = electric quantity/weight), the outer framework that leads to electric core all is light material, this energy density who has improved battery module, but correspondingly just can not guarantee battery module's intensity well.

Therefore, it is desirable to design a battery module and a vehicle to solve the problem of insufficient strength of the battery module.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery module, the cooling piece is fixed with a plurality of electric cores, has promoted the intensity of whole battery module.

Another object of the present invention is to provide a vehicle, the service life of the vehicle battery is longer.

To achieve the purpose, the utility model adopts the following technical proposal:

a battery module, comprising:

an electric core; and

and the cooling piece is arranged on one side of the battery cell and is abutted and fixed with the side surface of the battery cell.

Optionally, the cooling member is disposed below the battery cell.

Optionally, the battery module further includes:

and the heat-conducting medium is arranged between the cooling piece and the battery cell.

Optionally, the battery module further includes:

a support assembly disposed below the cooling member to support the cooling member; and

the battery cell comprises end plates, wherein the end plates are fixedly connected to two ends of the battery cells in a first direction, and the supporting component is connected with the two end plates at two ends of the battery cells in the first direction respectively.

Optionally, the support assembly includes:

a support plate disposed below the cooling member to support the cooling member; and

and a support member protruding from the support plate and extending in the first direction.

Optionally, the support assembly further comprises:

and the connecting pieces are arranged at two ends of the supporting plate along the first direction and are connected with the end parts of the corresponding end plates.

Optionally, the connecting member includes a connecting member body and a first protrusion connected to each other, the first protrusion is protruded from the connecting member body and extends in a second direction, the first protrusion abuts against the cooling member, and the second direction is perpendicular to the first direction and parallel to the supporting plate.

Optionally, the connecting member further includes an extending portion formed by the first protrusion extending toward the supporting plate along the first direction, and the extending portion is connected to the supporting plate.

Optionally, the number of the supporting plates is at least two, at least two of the supporting plates are arranged at intervals along a second direction, at least two of the supporting plates are connected with the corresponding connecting pieces, and the second direction is perpendicular to the first direction and parallel to the supporting plates.

A vehicle comprises the battery module.

The beneficial effects of the utility model reside in that:

the utility model provides a battery module, after cooling member and electric core butt and fixed make electric core thermal deformation, the effect that the cooling member can play the restriction to the expansive force of battery prevents that electric core inflation back battery module from collapsing absolutely, from this, the cooling member can strengthen battery module intensity as the structure when taking into account the heat transfer effect, and then guarantees the normal use of battery module.

The utility model provides a vehicle, above-mentioned vehicle is through adopting above-mentioned battery module, and the intensity of battery module promotes, and then has increased vehicle battery's life.

Drawings

Fig. 1 is an exploded view of a battery module according to an embodiment of the present invention;

fig. 2 is an exploded view of a cooling element and a support assembly according to an embodiment of the present invention;

fig. 3 is an exploded view of a cooling element and a support assembly according to an embodiment of the present invention;

FIG. 4 is an enlarged view at A in FIG. 3;

fig. 5 is an exploded view of a battery module according to an embodiment of the present invention.

In the figure:

10. an electric core;

20. a cooling member; 21. a body portion; 22. a second convex portion; 23. a water pipe;

30. a support assembly; 31. a support plate; 311. a recess; 32. a support member;

33. a connecting member; 331. a connector body; 332. a first convex portion; 333. an extension portion; 3331. a protrusion; 334. avoiding the position;

40. an end plate; 50. a cover plate; 51. lightening holes; 60. a side plate; 70. and (4) integrating the busbar.

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 invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures associated with the present invention are shown in the drawings, not all of them.

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, detachably 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. 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. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating 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.

Power battery is with its high energy, high power, can the advantage wide application in each field of cyclic utilization etc, and this kind of power battery often presents with the form of battery module, and current battery module generally includes electric core, and electric core power supply can produce a large amount of heats, is provided with cooling part and electric core outward and carries out the heat exchange usually, and cooling part and electric core are independent separately, and the user lifts up electric core, and electric core and cooling part separate promptly. Because this kind of battery module during operation temperature rises, certain deflection can be produced to the electricity core when the temperature rises, wherein the deflection on the first direction is great, the X direction is the first direction in the picture, can cause the electricity core fracture after the electricity core inflation for battery module can't normal use, but the battery module of present stage is all pursuing high energy density (energy density = electric quantity/weight), lead to the outer framework of electricity core all to be light material, this has improved the energy density of battery module, but the intensity of battery module just can not be guaranteed well correspondingly.

In order to solve the above problems, the present embodiment is an improvement of a component other than the existing battery module, and as shown in fig. 1, the present embodiment provides a battery module, in which a cooling member 20 of the battery module is disposed on one side of a battery cell 10, and is respectively abutted against a side surface of the battery cell 10 and fixed to the battery cell 10. After cooling member 20 and 10 butts of electric core and fix and make electric core 10 be heated and warp, cooling member 20 can play the effect of restriction to the bulging force of battery, prevents that the battery module from collapsing absolutely after 10 inflation of electric core, and from this, cooling member 20 can strengthen battery module intensity as the structure when taking into account the heat transfer effect, and then guarantees the normal use of battery module. Optionally, the battery module includes a plurality of battery cells 10, the battery cells 10 are arranged side by side along the first direction, and the adjacent battery cells 10 are abutted to each other. Optionally, the cooling element 20 is of plate-like construction.

Preferably, two adjacent battery cells 10 are fixed to each other, and when the battery cells 10 swell, the adjacent battery cells 10 are fixed to the battery cells to offset part of the swelling force. Optionally, two adjacent battery cells 10 are fixed by gluing.

Preferably, a heat conducting medium is arranged between the cooling element 20 and the plurality of battery cells 10, the heat conducting medium is made of colloid, and is arranged between the cooling element 20 and the battery cells 10, so that the bonding fixation between the cooling element 20 and the plurality of battery cells 10 can be realized, and the contact area between the battery cells 10 and the cooling element 20 can be increased in a phase-changing manner, the heat conduction between the battery cells 10 and the cooling element 20 is accelerated, the temperature uniformity of the plurality of battery cells 10 is ensured, and the heat transfer efficiency is improved.

Preferably, as shown in fig. 1, the cooling member 20 is disposed below the plurality of battery cells 10, so that the weight of the plurality of battery cells 10 is borne by the cooling member 20, and the pressure between the battery cells is increased, so that the cooling member 20 is in closer contact with the battery cells 10, and the heat transfer efficiency between the battery cells 10 and the cooling member 20 is further improved.

Alternatively, as shown in fig. 1, the cooling member 20 includes a body portion 21, two second protruding portions 22, and two water pipes 23, the body portion 21 is fixedly connected to the plurality of battery cells 10, the second protruding portions 22 are disposed at two ends of the body portion 21 in the X direction, and the water pipes 23 are connected to the body portion 21. The cooling element 20 is internally provided with a heat exchange medium, and the heat exchange medium enters from one water pipe 23, flows through the second protrusion 22, enters the body 21, exchanges heat, and then flows out from the other water pipe 23 to complete heat exchange.

Preferably, as shown in fig. 1, the cooling member 20 in the present embodiment is a stamping cooling member 20, the stamping cooling member 20 is formed by extrusion molding of aluminum material, and the stamping cooling member 20 has the advantages of light weight and simple manufacture. However, such a lightweight cooling member 20 is easily bent and deformed by the weight of the plurality of battery cells 10.

In order to solve the above problem, as shown in fig. 1, the battery module provided in this embodiment further includes a supporting component 30 and end plates 40, the two ends of the battery core 10 along the X direction are both fixedly connected with the end plates 40, the supporting component 30 is disposed below the cooling element 20 to support the cooling element 20, and the two ends of the supporting component 30 along the X direction are respectively connected with the two end plates 40. Through setting up supporting component 30 for the atress of cooling piece 20 can be born by supporting component 30, prevents that cooling piece 20 from warping, and simultaneously, supporting component 30 is connected with end plate 40, has further increased the limiting action to the bulging force of electricity core 10 in the X direction, increases the intensity of battery module.

Optionally, the end plate 40 is fixed to the battery cell 10 by gluing, and the embodiment is simple. In this embodiment, the end plate 40 and the support component 30 are both provided with mounting holes, and the bolts pass through the two fixing holes and then are screwed down by nuts and bolts to fix the end plate 40 and the support component 30. In other embodiments, the connection manner of the support assembly 30 and the end plate 40 may also be riveting, welding, etc., and is not limited herein.

Preferably, the support assembly 30 is welded and fixed to the cooling element 20, and can be integrated with the cooling element 20, and the support assembly 30 has a better reinforcing effect on the cooling element 20 than a case where the support assembly is provided separately from the cooling element 20. Preferably, the support assembly 30 and the cooling element 20 are fixed by brazing, which has the advantages of small deformation and smooth and beautiful joint.

Preferably, as shown in fig. 2, the support assembly 30 includes a support plate 31 and a support member 32, the support plate 31 is disposed below the cooling member 20 to support the cooling member 20, the support member 32 is disposed on the support plate 31 in a protruding manner and extends in the X direction, the support plate 31 is easily bent in the X direction due to the long length of the support plate 31 in the X direction, and the support member 32 is disposed to improve the strength of the support plate 31, so that the support plate 31 is not easily bent.

Preferably, as shown in fig. 2, the supporting assembly 30 includes a plurality of supporting members 32, the plurality of supporting members 32 are arranged at intervals along a Y direction (the Y direction is a second direction in the figure), the Y direction is perpendicular to the X direction and parallel to the supporting plate 31, and the plurality of supporting members 32 can further enhance the strength of the supporting plate 31 and prevent the supporting plate 31 from being deformed by force. Preferably, the supporting members 32 are provided at both side edges of the supporting plate 31 in the Y direction, where the supporting members 32 are provided to well support the edges of the cooling member 20 while protecting the edges of the cooling member 20. Preferably, the supporting plate 31 and the supporting member 32 are integrally formed, so as to avoid deformation caused by welding.

In order to make the supporting member 30 better resist the expansion force of the battery module along the X direction, the two ends of the supporting plate 31 along the X direction are welded, riveted or screwed with the end plate 40, when the supporting plate 31 and the end plate 40 are welded, because the supporting plate 31 is thin and large in size, the two ends of the supporting plate 31 are directly welded with the end plate 40, the two ends of the supporting plate 31 are deformed during welding, and because the supporting plate 31 is thin, the deformation amount of the ends easily causes the middle to be deformed, and the supporting plate 31 is deformed. In order to solve the above problem, the support assembly 30 further includes a connecting member 33, the connecting member 33 is connected to each end of the support plate 31 along the X direction, and the end plate 40 is connected to the connecting member 33, specifically, the connecting member 33 is substantially in the shape of a long strip and extends along the Y direction. Through the setting of connecting piece 33, make supporting component 30 can weld together with end plate 40, namely, supporting component 30 is connected with end plate 40 after with cooling piece 20 brazing, the bulging force along the X direction of electric core 10 is resisted jointly to the three, and connecting piece 33 is small-size in the X direction, the deflection is little when connecting piece 33 and end plate 40 welding, and connecting piece 33 sets up between backup plate 31 and end plate 40, avoided connecting piece 33 and end plate 40 welded deflection to pass to backup plate 31, improve the stability of backup plate 31 appearance. When support plate 31 is riveted or screwed to end plate 40, connecting member 33 is provided to prevent damage to support plate 31, and to ensure the strength of support plate 31.

Preferably, as shown in fig. 3 and 4, the connecting member 33 includes a connecting member body 331 and a first protrusion 332 connected to each other, the first protrusion 332 is protruded from the connecting member body 331 and extends in the Y direction, the first protrusion 332 can improve the strength of the connecting member 33, and at the same time, the top surface of the first protrusion 332 abuts against the edge of the cooling member 20 to support the edge of the cooling member 20 and protect the edge of the cooling member 20, it can be understood that the two first protrusions 332 and the two first supporting members 32 at the edge of the supporting plate 31 form a frame structure around the supporting plate 31 to significantly improve the strength of the supporting plate 31 and support the edge of the cooling member 20 together. Meanwhile, when the cooling member 20 is welded to the support assembly 30, the cooling member 20 can be brazed to the first protrusion 332 and the support member 32, so that the welding area is reduced, and deformation of the support plate 31 due to an excessively large welding surface is prevented.

To solve the above problems, since the support plate 31 is thin and the contact area between the both is small and the connection strength is low if the longitudinal section of the support plate 31 is used to connect with the connection member 33, as shown in fig. 3 and 4, the connection member 33 further includes an extension part 333, the extension part 333 is formed by extending the first protrusion 332 in the X direction and toward the support plate 31, and the extension part 333 is connected with the support plate 31. By the arrangement of the extending part 333, the upper surface of the support plate 31 is in contact with the lower surface of the extending part 333, the contact area between the support plate 31 and the connecting part 33 is increased, and the connection strength between the support plate 31 and the connecting part 33 is further increased. It is understood that the connector body 331, the first protrusion 332 and the extension 333 form a stepped structure toward the support plate 31, and the support plate 31 protrudes into the stepped structure to be connected with the connector 33.

In order to avoid the second protrusion 22 of the cooling element 20, optionally, as shown in fig. 3 and 4, the connecting element 33 is provided with an avoiding position 334, a bottom plate of the avoiding position 334 is flush with the upper surface of the connecting element body 331, so that the extending portion 333 is disconnected here, and the connecting element 33 is disconnected here with the support plate 31, and is connected with the connecting element 33 only through the longitudinal section of the support plate 31, in order to suitably improve the connection strength here, preferably, the bottom plate of the avoiding position 334 is arranged to protrude from the connecting element body 331 along the X direction and towards the support plate 31, a concave portion 311 is provided at the edge of the support plate 31 corresponding to the bottom plate of the avoiding position 334, the bottom plate of the avoiding position 334 is inserted into the concave portion 311, and the connection area between the support plate 31 and the connecting element 33 at the avoiding position 334 is suitably increased.

Alternatively, the supporting member 32 and the connecting member 33 are fixed by welding. Preferably, the supporting member 32 and the connecting member 33 are fixed by friction stir welding, the microstructure change of the heat affected zone of the welded joint by friction stir welding is small, the welded workpiece is not easy to deform, and the deformation amount of the supporting plate 31 and the connecting member 33 is small while the connection is stable compared with other welding methods. Alternatively, the supporting member 32 and the connecting member 33 are both manufactured by extrusion molding, and the molding is convenient and fast.

However, this kind of forming method has certain degree of difficulty when shaping great finished piece, and the monoblock backup pad 31 of extrusion is difficult to realize, for solving above-mentioned problem, above-mentioned supporting component 30 includes two at least backup pads 31, and two at least backup pads 31 set up along the Y direction interval, and two at least backup pads 31 all are connected with corresponding connecting piece 33 for single backup pad 31 is whole littleer, and the shaping is easier, has alleviateed backup pad 31's weight under the prerequisite that does not influence backup pad 31 intensity simultaneously. In the present embodiment, the supporting assembly 30 includes two supporting plates 31, and in other embodiments, the supporting plates 31 may be provided in plurality as needed, and are not limited herein.

In order to better connect the middle of the two support plates 31, it is preferable that the extension part 333 is extended downward at a position spaced apart from the two support plates 31 to form a projection 3331, and both side walls of the projection 3331 are connected to the edges of the support plates 31, respectively, to suitably increase the connection strength of the two support plates 31, as shown in fig. 3 and 4.

Optionally, as shown in fig. 5, the battery module further includes an integrated busbar 70 and a side plate 60, the integrated busbar 70 is installed on both sides of the plurality of battery cells 10 along the Y direction, both ends of the integrated busbar 70 are connected to the end plates 40, the side plate 60 and the integrated busbar 70 are arranged side by side, each integrated busbar 70 is correspondingly provided with one side plate 60, both ends of each side plate 60 are respectively connected to the corresponding end plates 40, and the bottom of each side plate 60 is connected to the cooling member 20. Specifically, the side plate 60 is a plastic member, and is bonded and fixed with the cooling member 20, and the side plate 60 plays an insulating and protecting role on the integrated busbar 70. The integrated busbar 70 is commonly applied to a battery module, and generally includes a flexible circuit board, a plastic component, and a copper aluminum bar, and is responsible for exchanging information with the outside and performing numerical control management on the battery, which is not described herein. Preferably, above-mentioned battery module still includes apron 50, and apron 50 arranges and sets up at the top of a plurality of electric cores 10 with a plurality of electric cores 10 along Z in fig. 5, and the both ends of apron 50 are connected with corresponding end plate 40, have further improved the restriction to electric core 10 bulging force, increase battery module's intensity. The connection manner of the cover plate 50 and the end plate 40 may be welding, riveting, etc., and is not limited herein. Preferably, the cover plate 50 is provided with lightening holes 51, so that the lightening effect can be achieved, and the heat dissipation efficiency of the battery can be improved. Optionally, two opposite edges of the cover plate 50 in the Y direction are bonded to the side plates 60, that is, the end plate 40, the cover plate 50, the side plates 60, and the connected cooling element 20 and the support assembly 30 together form a cube, and the plurality of battery cells 10 are surrounded by the cube.

This embodiment provides a vehicle, and above-mentioned vehicle is through adopting above-mentioned battery module, and battery module's intensity promotes, and then has increased vehicle battery's life.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. This need not be, nor should it be exhaustive of all embodiments. 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 claims of the present invention.

Claims (10)

1. A battery module, comprising:

an electrical core (10); and

the cooling piece (20) is arranged on one side of the battery cell (10) and is abutted and fixed with the side face of the battery cell (10), the cooling piece (20) comprises a body part (21), two second protruding parts (22) and two water pipes (23), the body part (21) is fixedly connected with the battery cells (10), the second protruding parts (22) are arranged at two ends of the body part (21) along the X direction, and the water pipes (23) are connected with the body part (21).

2. The battery module according to claim 1, characterized in that the cooling element (20) is arranged below the battery cell (10).

3. The battery module according to claim 2, further comprising:

and the heat-conducting medium is arranged between the cooling piece (20) and the battery core (10).

4. The battery module according to any one of claims 1 to 3, wherein the battery module further comprises:

a support assembly (30), the support assembly (30) being disposed below the cooling member (20) to support the cooling member (20); and

the battery cell support comprises an end plate (40), wherein the battery cells (10) are fixedly connected with the end plate (40) along two ends in a first direction, and the support component (30) is connected with the two end plates (40) along two ends in the first direction.

5. The battery module according to claim 4, wherein the support member (30) comprises:

a support plate (31) disposed below the cooling member (20) to support the cooling member (20); and

the supporting piece (32) is arranged on the supporting plate (31) in a protruding mode and extends along the first direction.

6. The battery module according to claim 5, wherein the support member (30) further comprises:

connecting piece (33), backup pad (31) are followed the both ends of first direction all are provided with connecting piece (33), connecting piece (33) and corresponding the tip of end plate (40) is connected.

7. The battery module according to claim 6, wherein the connector (33) comprises a connector body (331) and a first protrusion (332) connected to each other, the first protrusion (332) is protruded from the connector body (331) and extends in a second direction, the first protrusion (332) abuts against the cooling member (20), and the second direction is perpendicular to the first direction and parallel to the support plate (31).

8. The battery module according to claim 7, wherein the connection member (33) further comprises an extension part (333), the extension part (333) being formed by the first protrusion (332) extending in the first direction and toward the support plate (31), the extension part (333) being connected to the support plate (31).

9. The battery module according to claim 8, wherein the number of the support plates (31) is at least two, at least two of the support plates (31) are spaced apart in a second direction, and at least two of the support plates (31) are each coupled to the corresponding coupling member (33), and the second direction is perpendicular to the first direction and parallel to the support plates (31).

10. A vehicle characterized by comprising the battery module according to any one of claims 1 to 9.

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