CN215816166U

CN215816166U - Battery shell and battery module

Info

Publication number: CN215816166U
Application number: CN202121340146.2U
Authority: CN
Inventors: 吴盖特
Original assignee: Evergrande New Energy Technology Shenzhen Co Ltd
Current assignee: Evergrande New Energy Technology Shenzhen Co Ltd
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2022-02-11
Anticipated expiration: 2031-06-16

Abstract

The utility model provides a battery shell and a battery module, wherein the battery shell is used for accommodating at least one battery monomer and comprises a shell and a clamping mechanism, the shell comprises a shell body and a cover plate which is detachably connected with the shell body, and the cover plate and the shell body are jointly enclosed to form an accommodating cavity for accommodating the battery monomer; the clamping mechanism is connected with the shell and located in the containing cavity, and clamps the single battery. This battery case is through setting up fixture for battery monomer can be by the centre gripping in the holding intracavity of shell, and the relative position of battery monomer and shell is fixed this moment, prevents that battery monomer from rocking in the holding intracavity, has improved battery module overall structure's stability.

Description

Battery shell and battery module

Technical Field

The utility model belongs to the technical field of new energy automobiles, and particularly relates to a battery shell and a battery module.

Background

Along with the country advocates energy-concerving and environment-protective type economy, the domestic market is to electric automobile's consumption demand bigger and bigger, and the electric automobile field is also higher and higher to its technique and cost requirement, and wherein the most crucial requirement lies in the performance of battery, and whether the battery module is low-priced high-efficient, and whether its structure is simple reliable, and to a great extent is influencing the competitiveness of enterprise on the market. According to the requirements of voltage and capacity required by a load, a plurality of single battery cells are combined in series and parallel, wherein the voltage is increased through series connection, and the capacity is increased through parallel connection. For the soft package battery, in the design development and production process of the battery, a plurality of soft package battery cells or other battery monomers need to be stacked in sequence, and then the battery cells are connected in series or in parallel by using the bus bar.

However, the existing battery shell for accommodating the battery monomer can not be completely matched with the battery monomer, so that the battery monomer is easy to shake in the battery shell, and the structure of the battery module is unstable.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a battery shell and a battery module, and aims to solve the technical problem that a battery monomer is easy to shake in the battery shell in the prior art.

The present invention is achieved by a battery case for accommodating at least one battery cell, the battery case including:

the shell comprises a shell body and a cover plate detachably connected to the shell body, and the cover plate and the shell body jointly enclose to form an accommodating cavity for accommodating the battery monomer;

and the clamping mechanism is connected with the shell and positioned in the accommodating cavity, and clamps the single battery.

In one embodiment of the first aspect, the clamping mechanism includes a connecting plate and two clamping plates respectively connected to two opposite edges of the connecting plate, and the two clamping plates elastically clamp the battery cells.

In one embodiment of the first aspect, the clamping mechanism further includes a protrusion connected to the connecting plate and located between the two clamping plates, the protrusion can abut against the battery cell, and an edge of one clamping plate away from the connecting plate is bent toward the other clamping plate.

In one embodiment of the first aspect, the housing body includes a bottom plate, a side plate assembly connected to the bottom plate, and an end plate connected to the side plate assembly, the bottom plate, the side plate assembly, and the end plate together enclose a receiving groove, and the cover plate is rotatably connected to the side plate assembly and can cover a notch of the receiving groove to form the receiving cavity.

In one embodiment of the first aspect, the end plate is provided with a first avoiding groove, the battery case further includes an end insulating plate disposed inside the end plate, the end insulating plate is provided with a second avoiding groove, the end insulating plate is provided with a boss around the second avoiding groove, and the boss can extend into the first avoiding groove.

In a second aspect, a battery module is provided, which includes at least one battery cell and the above battery housing, where the battery cell is accommodated in the accommodating cavity of the battery housing.

In one embodiment of the second aspect, the battery module further includes a plurality of bus bars, each bus bar includes a bus plate and a plurality of bus bar connectors connected to the mounting surface of the bus plate, the plurality of bus bar connectors are arranged in parallel and at intervals, and the plurality of battery cells are respectively connected to the bus bar connectors and are all in electrical communication with the bus bars.

In one embodiment of the second aspect, the battery module further comprises a pressing plate connected to the bus bar connection member and clamping the tabs of the battery cells together.

In one embodiment of the second aspect, the battery module further includes a bus bar base, and the bus bar base is provided with a limiting groove, and the limiting groove is adapted to the cross section of the bus bar.

In one embodiment of the second aspect, the battery module further includes an insulating buffer cotton located between the battery cells and the housing and/or between two adjacent battery cells.

Compared with the prior art, the utility model has the technical effects that: this battery case is through setting up fixture for battery monomer can be by the centre gripping in the holding intracavity of shell, and the relative position of battery monomer and shell is fixed this moment, prevents that battery monomer from rocking in the holding intracavity, has improved battery module overall structure's stability.

Drawings

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

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

fig. 2 is an exploded view of a battery module according to an embodiment of the present invention;

FIG. 3 is a perspective view of the clamping mechanism of FIG. 2;

FIG. 4 is a perspective view of the base plate of FIG. 2;

FIG. 5 is a perspective view of the side plate assembly of FIG. 2;

fig. 6 is a perspective view of the end plate of fig. 2;

fig. 7 is a perspective view of an end insulating plate of fig. 2;

fig. 8 is a perspective view of the bus bar of fig. 2;

fig. 9 is a perspective view of the bus bar base in fig. 2.

Description of reference numerals:

100. a battery case; 11. a housing body; 111. a base plate; 1111. bending edges; 112. a side plate assembly; 1121. a side panel; 1122. a connecting rod; 113. an end plate; 1131. a first avoiding groove; 12. a cover plate; 20. a clamping mechanism; 21. a connecting plate; 22. a clamping plate; 221. clamping the bent part; 23. a convex strip; 30. an end insulating plate; 31. a boss; 301. a second avoiding groove; 40. a cross beam; 50. a transverse insulating plate; 61. a bus bar; 611. a bus bar; 612. a confluence connecting piece; 62. a confluence base; 621. a limiting groove; 70. insulating buffer cotton; 80. a heat insulating sheet; 90. and (4) a battery cell.

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 or similar 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 illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but 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 thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; 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 by those skilled in the art according to specific situations.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.

Referring to fig. 1 and fig. 2, a battery case 100 according to the present invention is used for accommodating at least one battery cell 90. The battery cell 90 may be provided in plurality, and a plurality of battery cells 90 are stacked.

Referring to fig. 2, the battery case 100 includes a case, a clamping mechanism 20, end insulating plates 30, a cross member 40, and a transverse insulating plate 50.

The housing includes a housing body 11 and a cover plate 12 detachably connected to the housing body 11, and the cover plate 12 and the housing body 11 together enclose an accommodating cavity for accommodating the battery cell 90. The cover plate 12 plays a role in safety protection of the top of the battery cell 90.

The cover plate 12 is connected with the shell body 11 in a rotating mode, the cover plate 12 covers the containing cavity or opens the containing cavity through rotating, and therefore the battery monomer 90 can be conveniently taken, placed and detached and utilized in a gradient mode. Specifically, a rotating shaft protrudes from the edge of the cover plate 12, and the side plate assembly 112 is provided with a groove, and the rotating shaft is clamped in the groove and can rotate. The through-hole has been seted up to the one end of apron 12 keeping away from the rotation axis, and the apron 12 accessible passes the bolt of through-hole and links to each other with shell body 11, when needing to change electric core module, only need remove above-mentioned bolt and shell body 11 be connected can. A plurality of first hoisting holes are formed in the middle of the cover plate 12.

The clamping mechanism 20 is connected to the housing and located in the accommodating cavity, and the clamping mechanism 20 can clamp the single battery 90.

This battery case 100 is through setting up fixture 20 for battery monomer 90 can be by the centre gripping in the holding chamber of shell, and the relative position of battery monomer 90 and shell is fixed this moment, prevents that battery monomer 90 from rocking in the holding chamber, has improved battery module overall structure's stability.

Specifically, referring to fig. 3, the clamping mechanism 20 includes a connecting plate 21, a clamping plate 22 and a protruding strip 23.

In the illustrated embodiment, the connecting plate 21 has a connecting surface, two clamping plates 22 are provided, two clamping plates 22 are respectively connected to two opposite edges of the connecting plate 21 and respectively extend outwards on one side of the connecting surface of the connecting plate 21, and the connecting plate 21 and the two clamping plates 22 together enclose to form a U-shaped structure. Two grip blocks 22 elasticity centre gripping battery monomer 90, this kind of centre gripping mode not only simple process, just with processing, play the cushioning effect to battery monomer 90 moreover, grip block 22 all the time with battery monomer 90 elasticity butt, reduced the influence of the whole error of battery monomer 90. In the present embodiment, the clamping plate 22 is made of a material capable of elastic deformation, and the clamping mechanism 20 clamps the battery cell 90 by the elastic deformation of the clamping plate 22. The edge of one clamping plate 22 away from the connecting plate 21 has a clamping bending part 221 bending towards the other clamping plate 22 to fasten the battery cell 90. In the present embodiment, the clamping mechanism 20 is made of an insulating material to press on the top of the battery cell 90 and perform an insulating function.

The protruding strip 23 is connected to the connecting plate 21 and located between the two clamping plates 22, and the protruding strip 23 protrudes from the connecting surface and extends parallel to the clamping plates 22. When fixture 20 centre gripping battery monomer 90, sand grip 23 can contradict in battery monomer 90, and connecting plate 21 and battery monomer 90 looks interval are favorable to battery monomer 90 to dispel the heat like this.

Referring to fig. 1 and 2, the case body 11 includes a bottom plate 111, a side plate assembly 112 connected to the bottom plate 111, and an end plate 113 connected to the side plate assembly 112, the bottom plate 111, the side plate assembly 112, and the end plate 113 together enclose to form an accommodating groove, and the cover plate 12 is rotatably connected to the side plate assembly 112 and can cover a notch of the accommodating groove to form an accommodating cavity. During the use, place battery monomer 90 in the storage tank earlier, rotate apron 12 again and make apron 12 lid fit the notch of storage tank to the realization is to battery monomer 90's encapsulation.

Referring to fig. 4, the bottom plate 111 is used to protect the bottom of the battery cell 90 and transfer heat in the battery cell 90 to an external liquid cooling system. Wherein, two opposite edges of the bottom plate 111 are bent upwards to form bending edges 1111, and the bending edges 1111 are connected with the side plate assembly 112.

Referring to fig. 5, the side plate assembly 112 includes two side plates 1121 and a connecting rod 1122 connecting the two side plates 1121, the two side plates 1121 are disposed in parallel and are used for protecting two sides of the battery cell 90, and the connecting rod 1122 is used for connecting the cover plate 12. The two end plates 113 are provided, and the two end plates 113 are screwed to the two side plates 1121 respectively through bolts and are arranged in parallel. The side panels 1121 are welded to the bottom plate 111. Wherein, one side panel 1121 is provided with the above-mentioned through hole for accommodating the rotation axis, and the other side panel 1121 is provided with a screw hole for connecting a bolt.

Referring to fig. 6, the end plate 113 and the bottom plate 111 are fixed by bolts. The end plates 113 serve to protect both ends of the entire battery cell 90, provide end structural support for the battery module, and simultaneously clamp the battery cell 90 therebetween. The end plate 113 is provided with a first avoiding groove 1131, the first avoiding groove 1131 penetrates through two side surfaces of the end plate 113, and the first avoiding groove 1131 is used for avoiding the protruding bus bar 611.

When the electric core is disassembled, if the single battery 90 is difficult to take out due to the large expansion amount of the single battery 90, the bolt fixation between the end plate 113 and the bottom plate 111 can be firstly released, so that the single battery 90 can be conveniently disassembled. In this embodiment, four small holes and five large through holes are formed in the end plate 113, wherein the four small holes are hoisting holes, and of the five large through holes, the holes on the two sides and the through hole in the middle are connecting holes of the end plate 113 and the bolt on the bottom plate 111, and the other two through holes are positioning holes of the battery module.

Referring to fig. 7, the end insulating plate 30 is disposed inside the end plate 113 and is connected to the end plate 113 by gluing. The end insulating plates 30 serve to insulate and protect end surfaces of both ends of the assembly of the battery cells 90. The end insulating plate 30 is provided with a second avoiding groove 301, the end insulating plate 30 is provided with a boss 31 around the second avoiding groove 301, and the boss 31 can extend into the first avoiding groove 1131. The bosses 31 serve to insulate the groove walls of the first avoiding groove 1131 from the bus bar 61.

The cross member 40 is connected to the bottom plate 111 and parallel to the both end plates 113, and the cross member 40 serves to improve mechanical properties of the entire structure of the battery case 100. Specifically, a protruding column is convexly arranged at the bottom of the cross beam 40, the protruding column is inserted into a connecting hole formed in the bottom plate 111, and the cross beam 40 is welded with the bottom plate 111 before the battery unit 90 is installed. The cross beam 40 divides the accommodating cavity into two sub-cavities, and a plurality of single batteries 90 are arranged in the two sub-cavities. The second lifting hole that sets up with first lifting hole relative is seted up to crossbeam 40 up end, and crossbeam 40 links to each other with the bolt that first lifting hole and second lifting hole were worn to locate to apron 12 accessible.

The transverse insulating plate 50 is connected to the cross member 40, and specifically, the transverse insulating plate 50 is bonded to both side end surfaces of the cross member 40. The transverse insulating plate 50 serves to insulate and protect the faces of the battery cells 90 adjacent to the cross member 40. Specifically, the cross beam 40 and the transverse insulating plate 50 may be fixed by gluing.

Referring to fig. 2, the battery module includes at least one battery cell 90, a bus bar 61, a bus bar base 62, a pressing plate, an insulating buffer cotton 70, a heat insulation sheet 80, and a battery case 100 provided in the above embodiments. In the present embodiment, a plurality of battery cells 90 are provided and are accommodated in the accommodating cavity of the battery case 100 side by side.

Referring to fig. 8, a plurality of bus bars 61 are provided, and the bus bars 61 are used for electrically connecting the tabs of a plurality of battery cells 90 to form a specific cell series-parallel connection mode. The bus bar 61 includes a bus bar plate 611 and a plurality of bus bar connectors 612 connected to a mounting surface of the bus bar plate 611, the plurality of bus bar connectors 612 are arranged in parallel and at intervals, so that a cross section of the bus bar 61 forms a rake shape, and the plurality of battery cells 90 are respectively connected to the bus bar connectors 612 and are all electrically communicated with the bus bar 61. Different bus bars 61 can be provided with different numbers of bus bar connectors 612 or bus bars 611 with different shapes due to different connection positions of the bus bars 61.

Specifically, the bus bar connector 612 and the tabs are connected by a pressing plate, and in this embodiment, the pressing plate and the bus bar connector 612 are connected and jointly clamp the tabs of the battery cells 90. Therefore, the bus bar connecting piece 612 and the pole lugs do not need to be welded, and the disassembly is convenient. When the device is used, the lugs are pressed on the confluence connecting piece 612 through the pressing plate, and the pressing plate is tightly connected with the confluence connecting piece 612 through the bolts. Thus, the tab can be well fixed between the pressure plate and the bus bar connector 612, and poor contact is not generated.

Referring to fig. 9, the bus base 62 is located at two sides of the bottom plate 111 and is adhered to the bent edge 1111 of the bottom plate 111, and the bus base 62 is used for installing and fixing the bus bar 61, that is, the bus bar 61 is connected to the housing through the bus base 62. The bus bar base 62 is provided with a limiting groove 621, and the limiting groove 621 is adapted to the cross section of the bus bar 61. The bus bar 61 is inserted into the bus base 62 through the limiting groove 621, so that the bus bar 61 is fixed, and meanwhile, the positioning effect of the bus bar 61 is improved. The bus bars 61 respectively connected to the battery cells 90 at the two ends can be used as positive and negative lead-out accommodating cavities of the battery module. The bus bars 61 at the two ends are attached to the inner side of the insulating plate of the end plate 113, and the leading-out section is lapped at the boss 31 of the insulating plate of the end plate 113 and passes through the first avoiding groove 1131 to extend outwards.

The insulating buffer cotton 70 may be located between the battery cells 90 and the housing, or between two adjacent battery cells 90. The insulating buffer cotton 70 plays a role of insulating and providing a buffer space. In the present embodiment, the insulating buffer cotton 70 may be foam and has a sheet shape.

Wherein, be equipped with insulating buffering cotton 70 between the top of battery monomer 90 and apron 12, this insulating buffering cotton 70 can regard as battery monomer 90 inflation and the buffer of vibration, protects battery monomer 90's safety. The insulating buffer cotton 70 is adhered to the cover plate 12. Specifically, the insulating buffer cotton 70 is located between the clamping mechanism 20 and the battery cell 90.

One piece of insulating buffer cotton 70 can be placed between every six battery cells 90 to provide space for the expansion of the battery cells 90. In order to facilitate the detachment of the battery cells 90, the insulating buffer cotton 70 between the battery cells 90 is only placed between the battery cells, and no gluing treatment is performed.

Insulating buffer wool 70 is also provided between the end insulating plate 30 and the end cell 90, which also provides a swelling margin for the end cell 90. The insulating buffer cotton 70 is just placed between the cells, and is not glued so as to be convenient to detach. Compared with the complete sheet structure of the insulating buffer cotton 70 between the battery cells 90, one end of the insulating buffer cotton 70 at the end part is provided with a groove to reserve an installation space for the leading-out section of the bus bar 61.

The heat insulating sheet 80 may be disposed between two adjacent battery cells 90, and in particular, one heat insulating sheet 80 may be disposed between every six battery cells 90, and the heat insulating sheet 80 serves to insulate between the battery cells 90 and delay the diffusion of heat generated by the battery cells 90. The heat insulating sheet 80 is also only placed between the cells, and is not glued so as to be convenient to detach.

The battery module solves the problem that the power battery for the vehicle reaching the service life is difficult to be used in a gradient way through the detachable battery shell 100. In the present embodiment, the battery cells 90 used may have dimensions of 590mm × 108mm × 14.746mm, the battery module may have a form of 2P45S, and the battery case 100 may be divided into two parts, 2P21S and 2P24S, by one cross member 40. When installing the single battery 90, firstly, the single battery 90 is placed on the bottom plate 111, the bus bars 61 are placed at the left and right tabs, the tabs are attached to the bus bars 61 through the pressing plate, and then the fastening is carried out through bolts. The front and rear ends of the battery cell 90 are sandwiched by end plates 113, and the upper part is covered with insulating buffer cotton 70. When the battery monomer 90 is disassembled, the cover plate 12 is rotated to open the cover plate, the clamping mechanism 20 and the insulating buffer cotton 70 at the top of the battery monomer 90 are taken down, the battery monomer 90 needing to be replaced is positioned, the bolts beside the pole lugs of the battery monomer 90 are loosened, the battery core is taken down and replaced by a new battery core, the bolts beside the pole lugs are screwed down again, the insulating buffer cotton 70 at the top of the battery monomer 90, the clamping mechanism 20 and the cover plate 12 are covered, and finally the bolts for fixing the cover plate 12 are screwed down, so that the replacement of the battery monomer 90 is realized.

The foregoing is considered as illustrative only of the preferred embodiments of the utility model, and is presented merely for purposes of illustration and description of the principles of the utility model and is not intended to limit the scope of the utility model in any way. Any modifications, equivalents and improvements made within the spirit and principles of the utility model and other embodiments of the utility model without the creative effort of those skilled in the art are included in the protection scope of the utility model based on the explanation here.

Claims

1. A battery housing for receiving at least one battery cell, the battery housing comprising:

2. The battery case according to claim 1, wherein the clamping mechanism comprises a connecting plate and two clamping plates respectively connected to two opposite edges of the connecting plate, and the two clamping plates elastically clamp the battery cells.

3. The battery case of claim 2, wherein the clamping mechanism further comprises a protrusion connected to the connecting plate and located between the two clamping plates, the protrusion can abut against the battery cell, and an edge of one clamping plate away from the connecting plate is bent toward the other clamping plate.

4. The battery shell according to claim 1, wherein the shell body comprises a bottom plate, a side plate assembly connected to the bottom plate, and an end plate connected to the side plate assembly, the bottom plate, the side plate assembly, and the end plate together enclose a receiving groove, and the cover plate is rotatably connected to the side plate assembly and can cover the notch of the receiving groove to form the receiving cavity.

5. The battery case according to claim 4, wherein the end plate is provided with a first avoiding groove, the battery case further comprises an end insulating plate disposed inside the end plate, the end insulating plate is provided with a second avoiding groove, the end insulating plate is provided with a boss around the second avoiding groove, and the boss can extend into the first avoiding groove.

6. A battery module is characterized by comprising battery cells and a battery shell as claimed in any one of claims 1 to 5, wherein at least one battery cell is arranged, and the battery cell is accommodated in the accommodating cavity of the battery shell.

7. The battery module of claim 6, further comprising a plurality of busbars including a bus bar plate and a plurality of bus bar connectors attached to a mounting surface of the bus bar plate, the plurality of bus bar connectors being arranged in parallel and spaced apart relation, the plurality of cells being respectively attached to the bus bar connectors and each being in electrical communication with the bus bar.

8. The battery module according to claim 7, further comprising a pressing plate coupled to the bus bar connection member and commonly clamping the tabs of the battery cells.

9. The battery module according to claim 7, further comprising a bus bar base, wherein the bus bar base is provided with a limiting groove, and the limiting groove is matched with the cross section of the bus bar.

10. The battery module according to claim 6, further comprising insulating buffer cotton between the battery cells and the housing and/or between two adjacent battery cells.