CN212725417U

CN212725417U - Battery module

Info

Publication number: CN212725417U
Application number: CN202021479910.XU
Authority: CN
Inventors: 张帆; 翁志福; 熊苏静; 吴光麟
Original assignee: Kunshan Bao Innovative Energy Technology Co Ltd
Current assignee: Kunshan Bao Innovative Energy Technology Co Ltd
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2021-03-16
Anticipated expiration: 2030-07-23

Abstract

The utility model discloses a battery module, battery module includes: fin, electric core and heat transfer pad. The fin includes the crosspiece and connects a plurality of vertical pieces on the crosspiece, prescribes a limit to a radiating groove between two adjacent vertical pieces and the crosspiece, crosspiece and a plurality of vertical piece formula structures as an organic whole. The electric core is established in the radiating groove, is provided with a plurality of electric cores in at least one radiating groove, indulges the piece and contacts with adjacent electric core. The heat transfer pad is located the radiating groove that is equipped with a plurality of electric cores, and the heat transfer pad presss from both sides between two adjacent electric cores, and the heat transfer pad contacts with the horizontal piece. According to the utility model discloses battery module will have the heat transfer pad clamp of heat dissipation function between two adjacent electric cores, with the heat on reaching the fin, increase the radiating efficiency of electric core to heat transfer pad still has the effect of absorbing dimensional tolerance, increases battery module's suitability. The integrated radiating fin is lighter in weight, can play a role in lightening the battery, is simple in structure, is convenient to take and can work more flexibly.

Description

Battery module

Technical Field

The utility model belongs to the technical field of the new forms of energy, especially, relate to a battery module.

Background

The battery can generate a large amount of heat in the working process, and the heat is accumulated, so that the working efficiency of the battery and even the service life of the battery core are reduced. Contact through fin and battery, can come out the heat conduction that the battery produced, in time the effluvium of heat through the faster fin of radiating rate. Traditional battery module is mutually supported battery respectively with a plurality of fin, passes through a plurality of blotters absorption tolerance with a plurality of electric cores of whole module again. The battery module has heavier weight, high size requirement during use and low heat dissipation efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a battery module, battery module is simple to use, and the structure lightweight, the radiating efficiency is high.

According to the utility model discloses battery module, include: the radiating fin comprises transverse fins and a plurality of longitudinal fins connected to the transverse fins, a radiating groove is defined between every two adjacent longitudinal fins and the transverse fins, and the transverse fins and the plurality of longitudinal fins are of an integrated structure; the battery cells are arranged in the heat dissipation grooves, a plurality of battery cells are arranged in at least one heat dissipation groove, and the longitudinal pieces are in contact with the adjacent battery cells; the heat transfer pad, the heat transfer pad is located and is equipped with a plurality ofly in the radiating groove of electricity core, just the heat transfer pad presss from both sides adjacent two between the electricity core, the heat transfer pad with the horizontal piece contacts.

According to the utility model discloses battery module, electric core are at least in tank bottom and fin contact, and some electric cores all contact with the fin on two sides or even trilateral, through the area of contact who guarantees electric core and fin, guarantee the radiating rate of electric core. And the fin integration, all electric cores can form effectual heat exchange route, avoid individual electric core to produce overheated because of heat transfer contact is bad, can form the comparatively even heat balance of temperature. The heat transfer pad that will have the heat dissipation function presss from both sides between two adjacent electric cores, passes to the heat sink with the heat on, increases the radiating efficiency of electric core to the heat transfer pad still has the effect of absorbing dimensional tolerance, increases battery module's suitability. In addition, the weight of integral type fin is lighter, can play the effect of battery lightweight to simple structure takes the convenience, and work is more nimble.

In some embodiments, the thermal delivery pad comprises: a gasket body; and the heat conducting fins are used for being in contact with the battery cell and embedded on the gasket body.

Specifically, the gasket body is plate-shaped, an embedding groove is formed in at least one side surface of the gasket body, and the heat-conducting fins are matched in the embedding groove.

Further, the heat conducting sheet is a graphene sheet.

Optionally, the edge of the heat transfer pad is provided with a clamping edge contacting with the edge of the battery core.

Specifically, the heat transfer pad forms a rectangular plate with a shape consistent with that of the battery cell, the four side edges of the heat transfer pad are respectively provided with the clamping edges contacting the battery cell, and the clamping edges on the four sides surround to form a groove.

Furthermore, convex hulls are formed on two opposite sides of the battery core, and the convex hulls are positioned in the grooves on one side facing the heat transfer pad.

In some embodiments, each of the longitudinal pieces is vertically connected to the transverse piece, the number of the battery cells in each heat dissipation groove is not more than two, and the battery cells are in contact with both the transverse pieces and the longitudinal pieces.

Optionally, the heat sink is a heat-dissipating aluminum sheet.

In some embodiments, the plurality of longitudinal pieces are arranged in parallel and at even intervals, and two battery cells are arranged in each heat dissipation groove.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

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

Fig. 2 is a perspective view illustrating an external appearance of a heat transfer pad in a battery module according to an embodiment of the present invention.

Reference numerals:

a battery module 100,

A heat radiating fin 1, a horizontal fin 11, a vertical fin 12, a heat radiating groove 13,

A battery cell 2, a convex hull 21,

The heat transfer pad 3, the pad body 31, the embedded groove 311, the heat conducting sheet 32, the clamping edge 33 and the groove 34.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "length", "width", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, 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.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 in specific cases to those skilled in the art.

A battery module 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 2.

The utility model discloses battery module 100, as shown in fig. 1 and fig. 2, include: cooling fin 1, electric core 2 and heat transfer pad 3. The heat sink 1 comprises a transverse plate 11 and a plurality of longitudinal plates 12 connected to the transverse plate 11, a heat sink 13 is defined between two adjacent longitudinal plates 12 and the transverse plate 11, and the transverse plate 11 and the plurality of longitudinal plates 12 are of an integral structure. The battery cells 2 are arranged in the heat dissipation grooves 13, a plurality of battery cells 2 are arranged in at least one heat dissipation groove 13, and the longitudinal pieces 12 are in contact with the adjacent battery cells 2. The heat transfer pad 3 is located in the heat dissipation groove 13 provided with the plurality of electric cores 2, the heat transfer pad 3 is clamped between two adjacent electric cores 2, and the heat transfer pad 3 is in contact with the cross piece 11.

According to the utility model discloses battery module 100, fin 1 comprises a plurality of vertical pieces 12 of arranging along vertical direction and the 11 integral types of horizontal piece of arranging along the horizontal direction and constitutes a frame, include a plurality of radiating grooves 13 in the frame, radiating groove 13's at least trilateral fin 1 that all has, establish electric core 2 in radiating groove 13, electric core 2 contacts with fin 1 at the tank bottom at least, through the area of contact who increases electric core 2 and fin 1, can improve the speed of heat transfer, increase electric core 2's radiating rate. And the radiating fins 1 are integrated, all the electric cores 2 can form an effective heat exchange path, overheating of individual electric cores 2 caused by poor heat transfer contact is avoided, and heat balance with relatively even temperature can be formed.

A plurality of electric cores 2 set up in a radiating groove 13, and the contact site between electric core 2 is relatively poor in comparison in other position radiating effect, and heat transfer pad 3 with the heat dissipation function presss from both sides between two adjacent electric cores 2, and heat transfer pad 3 contacts with the horizontal piece 11 of fin 1, passes to the fin 1 with the heat on, increases electric core 2's radiating efficiency to heat transfer pad 3 still has the effect of absorbing dimensional tolerance, increases battery module 100's suitability. Through addding heat transfer pad 3, can satisfy not unidimensional electric core 2, for example can place two electric cores 2 in the radiating groove 13, but can't hold three electric core 2, place two electric core 2 backs, remaining space is great in the radiating groove 13, and two electric cores 2 are placed unstably, can increase several heat transfer pad 3 between two electric cores 2, absorb dimensional tolerance, improve electric core 2's stability to improve battery module 100's work security nature.

In addition, compare in addding fin 1 respectively and cooperate with electric core 2, fixed split type battery module 100 such as rethread heat dissipation is glued, integral type fin 1's weight is lighter, can play the effect of battery lightweight to simple structure takes the convenience, and work is more nimble.

In some embodiments, a battery cell 2 may be disposed in the heat sink 13, and the dimensional tolerance between the battery cell 2 and the heat sink 1 may be supplemented by the heat transfer pad 3, so as to fix the battery cell 2 in the heat sink 13.

In some embodiments, as shown in FIG. 2, the thermal delivery pad 3 includes: a gasket body 31; and the heat conducting sheet 32 is used for being in contact with the battery cell 2, and the heat conducting sheet 32 is embedded on the gasket body 31.

It can be understood that, the central point of electric core 2 puts the during operation and gathers the heat most, and the heat of the edge of electric core 2 effluvium easily, the embedded conducting strip 32 of gasket body 31 is located the position that heat transfer pad 3 is comparatively central, the position that 2 heats of electric core were gathered promptly, the position assurance that conducting strip 32 arranged contacts with electric core 2 as far as possible, and the heat dissipation efficiency is improved, except conducting strip 32, there is the round sideboard around conducting strip 32 on gasket body 31, the inside conducting strip 32 can be protected to the sideboard, when receiving the impact, the sideboard in the outside receives the damage at first, can improve conducting strip 32's security. The side plates are convenient for grabbing the heat transfer pad 3, the side plates are convenient for grabbing and transporting through mechanical parts during production and manufacturing of the heat transfer pad 3, and the occurrence of scratching of the internal heat conducting fins 32 can be reduced. The gasket body 31 is not entirely made of the heat conductive sheet 32, and the manufacturing cost of the heat transfer pad 3 can be reduced.

Specifically, as shown in fig. 2, the gasket body 31 has a plate shape, at least one side surface of the gasket body 31 is formed with a caulking groove 311, and the heat conductive sheet 32 is fitted in the caulking groove 311.

The heat transfer pad 3 is platy and can be tightly attached to the battery cell 2, so that the heat conduction efficiency can be improved, the battery cell 2 can be stabilized, and the oscillation of the battery cell 2 in the heat dissipation groove 13 is reduced. The caulking groove 311 is formed on one side surface of the gasket body 31 or the caulking groove 311 is formed on both sides of the gasket body 31, which can be freely selected by the arrangement mode, when two cells 2 sandwich one heat transfer pad 3, the caulking groove 311 is formed on both sides of the gasket body 31, two cells 2 can conduct heat through the same heat transfer pad 3, when two heat transfer pads 3 are sandwiched between two cells 2, the caulking groove 311 is formed on one side surface of the gasket body 31, the caulking groove 311 faces to the direction of the cells 2, and the heat conducting sheet 32 is in contact with the cells 2 for heat conduction.

Compare in direct with conducting strip 32 through mode direct cooperation such as gluing on gasket body 31 surface, with the connected mode of conducting strip 32 cooperation in caulking groove 311, can make heat transfer pad 3's whole more level and smooth, assemble more easily between electric core 2 to conducting strip 32 is more firm in caulking groove 311, is difficult for deviating from.

In some embodiments, the surface of the heat conducting sheet 32 is approximately flush with the surface of the gasket body 31, and the surface of the heat transfer pad 3 is more flat, so as to facilitate assembly with the battery cell 2.

Further, the thermally conductive sheet 32 is a graphene sheet.

Research and development people team through many times experimental analysis, has selected graphite alkene as conducting strip 32 material, the low cost of graphite alkene, and its heat conductivility is good, can come out the heat transfer that electric core 2 produced fast to graphite alkene's melting point is very high, and its physical properties is hardly influenced by the temperature, and the heat that electric core 2 produced can not cause the damage to it, and graphite alkene's job stabilization nature is high. In addition, the graphene is an insulating part, can provide insulation protection for the battery cell 2, has high toughness, and can protect the battery cell 2 from damage when being impacted.

In some embodiments, as shown in fig. 2, the edge of the thermal transfer pad 3 is provided with a clamping edge 33 contacting with the edge of the battery cell 2.

The edge of heat transfer pad 3 is equipped with the card limit 33 towards electric core 2, and card limit 33 and the contact of electric core 2 can cooperate with electric core 2, closely cooperates electric core 2 and heat transfer pad 3, improves heat-conduction efficiency.

The edge of the heat transfer pad 3 is provided with a clamping edge 33 facing the battery cell 2, that is, the clamping edge 33 faces the direction of the caulking groove 311, in some embodiments, both side surfaces of the gasket body 31 are formed with the caulking groove 311, the clamping edge 33 of the heat transfer pad 3 faces both side surfaces, and the heat transfer pad 3 can contact with the edges of the battery cells 2 on both sides. In other embodiments, a side surface of the gasket body 31 forms a groove 311, and the clamping edge 33 of the thermal transfer pad 3 faces the groove 311 and contacts with the edge of the battery cell 2.

Specifically, as shown in fig. 2, the heat transfer pad 3 is formed as a rectangular plate having a shape corresponding to that of the battery cell 2, four side edges of the heat transfer pad 3 are respectively formed with a clamping edge 33 contacting with the battery cell 2, and the clamping edges 33 on the four sides surround to form a groove 34.

The heat transfer pad 3 is unanimous with electric core 2 shape, and the heat transfer pad 3 is arranged in the radiating groove 13 with electric core 2 jointly, and its highly uniform improves battery module 100's whole pleasing to the eye degree. Card limit 33 all is formed with on the four sides edge of heat transfer pad 3, all with 2 marginal contacts of electric core, 2 atress of electric core are even,

heat transfer pad

3 and 2 in close contact with of electric core, improve heat conduction efficiency.

In some embodiments, the rectangular heat transfer pad 3 has two long clamping edges 33 symmetrically disposed on the edges of the two long sides, and the rectangular heat transfer pad 3 has two short clamping edges 33 symmetrically disposed on the edges of the two wide sides, the two long clamping edges 33 can be used for fastening the electrical core 2, and the two wide clamping edges 33 can be used for mounting and dismounting the electrical core 2.

Further, as shown in fig. 1, the battery cell 2 is formed with convex hulls 21 at opposite sides thereof, and the convex hulls 21 are located in the grooves 34 at a side facing the thermal transfer pad 3.

The convex hulls 21 are formed on the two opposite sides of the battery cell 2, the convex hulls 21 on one side facing the heat transfer pad 3 are positioned in the grooves 34 formed by the clamping edges 33 of the heat transfer pad 3, the clamping edges 33 can compensate the size of the convex hulls 21, and the edges of the battery cell 2 are clamped and fixed in a clamping manner, so that the convex hulls 21 of the battery cell 2 are in close contact with the heat conducting fins 32, and the heat conduction efficiency is improved.

In some embodiments, each longitudinal piece 12 is vertically connected to the transverse piece 11, the number of the battery cells 2 in each heat sink 13 is not more than two, and the battery cells 2 are in contact with both the transverse piece 11 and the longitudinal pieces 12.

Indulge piece 12 and arrange along vertical direction, connect perpendicularly on the horizontal piece 11 of arranging along the horizontal direction, the arrangement of fin 1 is neat, and the radiating groove 13 size is regular, and is comparatively even with electric core 2 contact, and electric core 2's heat-conduction efficiency is average, and the radiating efficiency is high. The number of the electric cores 2 in each heat dissipation groove 13 is less than two, and at least two sides of the electric cores 2 can be in contact with the heat dissipation fins 1 for heat dissipation, namely the transverse pieces 11 on the bottom surface and the longitudinal pieces 12 on the side surfaces. At least one heat transfer pad 3 is arranged between the electric cores 2, and the heat transfer pad 3 transfers the heat of the electric cores 2 to the transverse plate 11 of the radiating fin 1 through the heat transfer pad 3, so that the radiating efficiency is improved.

Optionally, the heat sink 1 is a heat sink aluminum sheet.

The radiating aluminum sheet has low cost and high heat transfer efficiency, and is favorable for mass production.

In some embodiments, the plurality of longitudinal pieces 12 are disposed in parallel and at uniform intervals, and two battery cells 2 are disposed in each heat dissipation slot 13.

The plurality of longitudinal pieces 12 are arranged in parallel and at even intervals, the heat dissipation grooves 13 are even in size and even in contact with the battery cell 2, the heat conduction efficiency of the battery cell 2 is average, the heat dissipation efficiency is high, and the overall attractiveness is high. All be equipped with two electric cores 2 in every radiating groove 13, one side convex closure 21 and the contact of fin 1 of electric core 2, the heat conduction of opposite side convex closure 21 and the contact of heat transfer pad 3, the area of contact increase of electric core 2 and fin 1 improves electric core 2 radiating efficiency.

The structure and heat dissipation process of the battery module 100 in one embodiment will be described with reference to fig. 1 to 2.

The battery module 100 includes: cooling fin 1, electric core 2 and heat transfer pad 3. The radiating fin 1 is the radiating aluminum sheet, and radiating fin 1 includes horizontal piece 11 and a plurality of vertical pieces 12 of perpendicular connection at horizontal piece 11, and a plurality of vertical pieces 12 are parallel and even interval sets up, inject radiating groove 13 between two adjacent vertical pieces 12 and horizontal piece 11, horizontal piece 11 and vertical piece 12 formula structure as an organic whole. Two battery cores 2 are arranged in each heat dissipation groove 13, and the battery cores 2 are in contact with the transverse sheets 11 and the longitudinal sheets 12. The heat transfer pad 3 is located in the heat dissipation groove 13 and sandwiched between the two battery cells 2, and the heat transfer pad 3 is a rectangular plate with the same shape as the battery cells 2 and is in contact with the cross piece 11. Heat transfer pad 3 includes gasket body 31 and conducting strip 32, both sides surface at gasket body 31 is formed with caulking groove 311, conducting strip 32 is the graphite alkene piece, the cooperation is in caulking groove 311, all be formed with the card limit 33 of contact electricity core 2 on the four sides reason of heat transfer pad 3, the recess 34 is surrounded to the card limit 33 of four sides, the both sides of electricity core 2 are formed with convex closure 21, the convex closure 21 of electricity core 2 is located recess 34, the size that convex closure 21 produced is eliminated to card limit 33, battery module 100 is whole level and smooth, better outward appearance degree has.

According to the utility model discloses battery module 100, two electric cores 2 are located radiating groove 13, accompany heat transfer pad 3 between two electric cores 2, the contact of convex closure 21 of electric core 2 and heat transfer pad 3 middle conducting strip 32, heat transfer pad 3 is the horizontal piece 11 with heat transfer to the bottom again, the both sides of electric core 2 and base can both contact with fin 1, increase electric core 2 and fin 1's area of contact, can improve the speed of heat transfer, increase electric core 2's radiating rate, and the card limit 33 of 3 four sides of heat transfer pad makes electric core 2 inseparabler with the laminating of heat transfer pad 3, increase radiating efficiency, and fin 1 integration, all electric core 2 can form effectual heat exchange route, avoid individual electric core 2 to produce overheated because of heat transfer contact is bad, can form the comparatively average thermal equilibrium of temperature. In addition, integral type fin 1's weight is lighter, can play the effect of battery lightweight to simple structure takes the convenience, and work is more nimble, and holistic pleasing to the eye degree is higher.

Other configurations, such as heat sinks and battery cells, and operations of the battery module according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail herein.

In the description herein, references to the description of the terms "embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery module, comprising:

the radiating fin comprises transverse fins and a plurality of longitudinal fins connected to the transverse fins, a radiating groove is defined between every two adjacent longitudinal fins and the transverse fins, and the transverse fins and the plurality of longitudinal fins are of an integrated structure;

the battery cells are arranged in the heat dissipation grooves, a plurality of battery cells are arranged in at least one heat dissipation groove, and the longitudinal pieces are in contact with the adjacent battery cells;

the heat transfer pad, the heat transfer pad is located and is equipped with a plurality ofly in the radiating groove of electricity core, just the heat transfer pad presss from both sides adjacent two between the electricity core, the heat transfer pad with the horizontal piece contacts.

2. The battery module according to claim 1, wherein the heat transfer pad comprises:

a gasket body;

and the heat conducting fins are used for being in contact with the battery cell and embedded on the gasket body.

3. The battery module according to claim 2, wherein the gasket body has a plate shape, at least one side surface of the gasket body is formed with a caulking groove, and the heat conductive sheet is fitted in the caulking groove.

4. The battery module according to claim 3, wherein the thermally conductive sheet is a graphene sheet.

5. The battery module according to claim 1, wherein an edge of the heat transfer pad is provided with a clamping edge that contacts an edge of the battery cell.

6. The battery module according to claim 5, wherein the heat transfer pad is formed into a rectangular plate having a shape corresponding to that of the battery cell, four side edges of the heat transfer pad are respectively provided with the clamping edges contacting with the battery cell, and the clamping edges on the four sides surround to form a groove.

7. The battery module according to claim 6, wherein the battery core is formed with convex hulls at opposite sides thereof, and the convex hulls are located in the grooves at a side facing the heat transfer pad.

8. The battery module of claim 1, wherein each of the longitudinal pieces is vertically connected to the transverse piece, the number of the battery cells in each heat dissipation groove is not more than two, and the battery cells are in contact with both the transverse pieces and the longitudinal pieces.

9. The battery module according to claim 1, wherein the heat sink is a heat-dissipating aluminum sheet.

10. The battery module according to any one of claims 1 to 9, wherein the plurality of longitudinal plates are arranged in parallel and at uniform intervals, and two battery cells are arranged in each heat dissipation groove.