CN220821771U - Battery shell and battery module - Google Patents

Abstract

The application provides a battery shell and a battery module, wherein the battery shell comprises a plurality of sub-shells which are arranged and spliced along a first direction, and each sub-shell comprises a main body plate, a side coaming and a first heat conducting fin; the two side wall plates are respectively connected with the edges of the two opposite sides of the main body plate, and at least one accommodating cavity is formed by enclosing the side wall plates and the main body plate; at least one side wall plate is provided with a first heat conducting fin, and the first heat conducting fin is positioned on the surface of the side wall plate, which is far away from the accommodating cavity. So set up, because main part board has relation of connection with the side wall board, can realize that the main part board conducts the heat that the electricity core produced to the side wall board, because the first conducting strip that sets up in the side wall board is exposed at the surface of side wall board, so can dispel the heat well, also realized the heat conduction that produces the electricity core in whole module through the structural feature of dividing the shell promptly and come out, have good radiating effect, solved the poor problem of battery housing structure radiating effect among the prior art.

Description

Battery shell and battery module

Technical Field

The application relates to the technical field of battery production, in particular to a battery shell and a battery module.

Background

In the fields of automobile power, energy storage systems, mobile power sources and the like, a plurality of battery cells are assembled into a battery module in the production process of a battery. Wherein, battery case provides holding chamber and fixed position for the electric core, among the prior art, battery case has stronger wholeness and closure, is unfavorable for the heat dissipation of electric core, reduces the wholeness of battery easily.

Disclosure of utility model

In view of the above, the present application provides a battery case and a battery module, which solves the technical problem of poor heat dissipation effect of the battery case structure in the prior art.

In order to achieve the above purpose, the present application provides the following technical solutions:

A battery case comprising a plurality of sub-cases aligned and spliced along a first direction, the sub-cases comprising:

A main body plate;

The side surrounding plates are respectively connected with the edges of the two opposite sides of the main body plate, and at least one accommodating cavity is formed by surrounding the side surrounding plates and the main body plate;

The first heat conducting fin is arranged on at least one side wall plate, and the first heat conducting fin is located on the surface, away from the accommodating cavity, of the side wall plate.

Optionally, the first heat conducting fin is provided with at least one notch penetrating along the first direction, the side coaming is provided with at least one groove penetrating along the first direction, and the notch and the groove are arranged in one-to-one correspondence.

Optionally, along the third direction, two gaps are arranged on the first heat conducting fin at intervals, and the first heat conducting fin is divided into a first area, a second area and a third area in sequence, wherein the two gaps are respectively located in the first area and the third area.

Optionally, the sub-shell further includes a second heat conducting fin, where the second heat conducting fin is disposed on a surface of the main body plate facing the accommodating cavity, and the second heat conducting fin and the first heat conducting fin are in an integral connection structure, and the second heat conducting fin and the first heat conducting fin are integrally formed with the sub-shell.

Optionally, the side coaming is provided with a plug body and a plug hole, and any plug body of the sub-shell is plugged in the plug hole of the adjacent sub-shell.

Optionally, the sub-shell further comprises a bottom, wherein the bottom is connected to the edge of the main body plate and located between the side panels on two sides, all the side panels of the sub-shell are contacted and connected, and all the bottom of the sub-shell are contacted and connected.

Optionally, along the first direction, two sides of the main body plate facing away from each other are respectively provided with the accommodating cavity.

The battery module comprises an electric core, a PCB board and a battery shell in any one of the above, wherein a plurality of electric cores are arranged in all the accommodating cavities, each electric core is provided with a tab, and the tabs are electrically connected with the PCB board.

Optionally, the method further comprises:

The backboard is positioned on the outer side surface of the battery shell and is in butt joint with all the first heat conducting sheets or connected with the first heat conducting sheets through heat conducting silica gel sheets;

End plates provided with two and clamped at two opposite sides of the battery case along the first direction;

the cover body is connected with the battery shell and is covered on the PCB;

the ribbon, the ribbon cover is established the outside of battery case.

Optionally, the battery cell further comprises sampling sheets, wherein adjacent electrode lugs of the battery cells are overlapped, and the sampling sheets are respectively connected with the electrode lugs and the PCB.

The application provides a battery shell, which comprises a plurality of split shells arranged and spliced along a first direction, wherein each split shell comprises a main body plate, a side coaming and a first heat conducting fin; the two side wall plates are respectively connected with the edges of the two opposite sides of the main body plate, and at least one accommodating cavity is formed by enclosing the side wall plates and the main body plate; at least one side wall plate is provided with a first heat conducting fin, and the first heat conducting fin is positioned on the surface of the side wall plate, which is far away from the accommodating cavity. The battery shell is formed by splicing a plurality of sub-shells, the sub-shells are matched with the side wall plates to form accommodating cavities capable of accommodating the battery cells, when the battery module is assembled, the sub-shells are arranged and spliced along the first direction, the battery cells are dispersed and fixed in the accommodating cavities, meanwhile, the battery cells are also arranged along the first direction, the main body plates are arranged at intervals between the battery cells, the main body plates have a limiting effect on the battery cells, and the main body plates and the side wall plates are connected, so that the heat generated by the battery cells can be conducted to the side wall plates by the main body plates.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a split shell according to an embodiment of the present application;

fig. 2 is a schematic diagram of split-shell splicing according to an embodiment of the present application;

Fig. 3 is a schematic structural view of a battery module according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of the back plate separated from the battery case according to the embodiment of the present application.

In fig. 1-4:

1. Separating shells; 2. an end plate; 3. a tie; 4. a cover body; 5. a battery cell; 6. a PCB board; 7. a back plate; 8. a thermally conductive silicone sheet;

11. a main body plate; 12. side coaming; 13. a bottom; 14. a plug body; 15. a plug hole; 16. a first heat conductive sheet; 17. a second heat conductive sheet; 18. a notch;

121. A groove;

51. And a tab.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

As shown in fig. 1 to 4, an embodiment of the present application provides a battery case, including a plurality of sub-cases 1 arranged and spliced along a first direction, the sub-cases 1 including a main body plate 11, side panels 12, and first heat conductive sheets 16; the main body plate 11 is taken as a main body, two side wall plates 12 are respectively connected to the edges of two opposite sides of the main body plate 11, at least one accommodating cavity is formed by enclosing the side wall plates 12 and the main body plate 11, the accommodating cavity at least accommodates a single battery cell 5, all the accommodating cavities are arranged along a first direction and are in a spaced relationship, namely, the main body plates 11 of all the sub-shells 1 are in parallel relationship, and the main body plates 11 can be in surface contact with the battery cells 5 positioned in the accommodating cavities; at least one side wall plate 12 is provided with a first heat conductive sheet 16, and the first heat conductive sheet 16 is provided in the side wall plate 12 and located on a surface of the side wall plate 12 away from the accommodating chamber, i.e., exposed on an outer surface of the side wall plate 12 facing the outside. After all the sub-shells 1 are spliced, all the side coamings 12 are spliced to form an integral side wall.

The battery shell is formed by splicing a plurality of sub-shells 1, the sub-shells are formed by matching the main body plate 11 and the side wall plates 12 to form a containing cavity capable of containing the battery cells 5, when the battery module is assembled, the sub-shells are arranged and spliced along the first direction, the battery cells 5 are dispersed and fixed in the containing cavities, meanwhile, the battery cells 5 are also arranged along the first direction, the main body plate 11 is arranged along the first direction, the position relationship between the battery cells 5 is presented, the main body plate 11 has a limiting effect on the battery cells 5, and the main body plate 11 and the side wall plates 12 are connected, so that the heat generated by the battery cells 5 can be conducted to the side wall plates 12 through the main body plate 11.

It should be noted that, as shown in the figure, the first direction is a preset arrangement direction of the battery cells 5, and is also a length direction of the module, the first direction is an X-axis direction in the figure, the second direction is a width direction of the module, the second direction is a Y-axis direction in the figure, and the third direction is a Z-axis direction.

In order to optimize the overall structural stability of the battery module, generally, the outer periphery of the battery case may be further covered with the binding tape 3, and in a specific embodiment, the first heat conducting strip 16 is provided with at least one notch 18 penetrating along the first direction, and the side wall plate 12 is provided with at least one groove 121 penetrating along the first direction, where the notches 18 are arranged in a one-to-one correspondence with the grooves 121. The penetration means that both sides of the notch 18 in the first direction are not shielded. That is, after all the sub-cases 1 are spliced, all the grooves 121 communicate, and the grooves 121 accommodate the bands 3 that are fitted around all the sub-cases 1.

In this way, since the first heat conducting fin 16 needs to be exposed on the outer surface of the side wall plate 12 of the sub-shell 1, in order to prevent the tie 3 from being sleeved outside the first heat conducting fin 16 and abutting between the first heat conducting fin 16 and the back plate 7, the first heat conducting fin 16 and the back plate 7 cannot be in direct contact, and the heat dissipation effect is affected, a notch 18 penetrating along the first direction is arranged on the first heat conducting fin 16 so as to avoid the tie 3; on the other hand, the groove 121 is reserved for the ribbon 3 to be sleeved on the split shell 1 in a certain position, so that the ribbon 3 can be accurately sleeved. The problem of the ribbon and battery case connection feasibility is solved while optimizing the heat dissipation effect through the structural design of the battery case.

Further, along the third direction, two notches which are distributed up and down and are parallel to each other are arranged on the first heat conducting fin at intervals, and the height area of the first heat conducting fin 16 is divided into a first area, a second area and a third area in sequence in the third direction, wherein the two notches are respectively located in the first area and the third area.

So set up, the height of first conducting strip 16 is corresponding with the height of battery case, can make ribbon 3 be located the upper and lower third region of whole battery case respectively like this, ensures that the battery case bears the spacing effect of ribbon 3 uniformly, optimizes whole mechanics model.

In a preferred embodiment, the sub-housing 1 further includes a second heat conducting fin 17, where the second heat conducting fin 17 is disposed on a surface of the main body plate 11 facing the accommodating cavity, and the second heat conducting fin 17 and the first heat conducting fin 16 are integrally connected to form a unitary heat conducting fin structure. The second heat conductive sheet 17 and the first heat conductive sheet 16 may be specifically aluminum sheets or copper sheets having good heat conductive properties. The second heat conductive sheet 17 and the first heat conductive sheet 16 are preferably provided to be injection molded integrally with the sub-case 1.

By the arrangement, on one hand, the efficiency of heat generated by the battery cell 5 to be transmitted to the sub-shell 1 is improved, and the heat is transmitted to the first heat conducting fin 16 by the second heat conducting fin 17, so that the heat is dissipated to the external environment, and the heat dissipation performance of the sub-shell 1 is further improved; on the other hand, the second heat conducting fin 17 and the first heat conducting fin form a heat conducting fin structure which is integrally connected with the sub-shell 1 by injection molding, namely, the sub-shell 1 is injection molded, and in the injection molding process, the heat conducting fin structure is placed on a mold thereof and is fixedly connected with the heat conducting fin structure at the same time of injection molding. In this way, the second heat conductive sheet 17 and the first heat conductive sheet 16 are reliably connected to the sub-case 1, good heat conduction between the second heat conductive sheet 17, the first heat conductive sheet 16 and the sub-case 1 is ensured, and the process of exposing the first heat conductive sheet 16 to the outer surface of the side wall plate 12 facing the outside is easily performed. In addition, it is also possible that the thermally conductive sheet structure is adhered to the sub-housing 1 by a thermally conductive adhesive.

Regarding how the split joint is implemented between the sub-shells 1, in a specific embodiment, the side wall plate 12 has a certain thickness, and the side wall plate 12 is provided with the plugging body 14 and the plugging hole 15, and the plugging body 14 of any sub-shell 1 can be plugged with the plugging hole 15 of the adjacent sub-shell 1 along the first direction. The plug body 14 can be cylindrical or sheet-shaped, and the shape of the plug hole 15 is matched with the plug body 14; it should be noted that the sub-case 1 located at the two ends in the first direction may be one provided with only the plug body 14 and one provided with only the plug hole 15.

So set up, because the direction of pegging graft is unanimous with the concatenation direction, just install electric core 5 location in each space when the concatenation, owing to be direct pressure on electric core 5 in addition, and can not have any wearing and tearing to electric core 5, the equipment is easy, safe and reliable, and it is convenient to splice between the branch shell 1, and the connection relationship is firm reliable after the concatenation.

Further, the axis of the plugging body 14 on each sub-shell 1 coincides with the axis of the plugging hole 15 in the first direction, that is, the plugging body 14 and the plugging hole 15 on each sub-shell 1 are opposite to each other along the first direction, the positions of the plugging body 14 and the plugging hole 15 on each sub-shell 1 are the same, and the plugging body 14 of any sub-shell 1 can be plugged with the plugging hole 15 of the adjacent sub-shell 1 along the first direction.

In a preferred embodiment, the plugging bodies 14 and the plugging holes 15 are distributed at least at the edge positions of the two ends of the side wall plate 12, that is, in the height direction of the side wall plate 12, the lowest position and the highest position are respectively provided with the plugging bodies 14 and the plugging holes 15. Therefore, after all the sub-shells 1 are spliced, four splicing lines positioned at the corners are integrally formed, the stress is uniform, and the connection relationship is stable.

In a more specific embodiment, the sub-shell 1 further comprises a bottom 13, wherein the bottom 13 is connected to the edge of the main body plate 11 and is located between the side coamings 12 on two sides, that is, the side coamings 12 and the bottom 13 together form a semi-enclosure for the main body plate 11, and all the side coamings 12 of the sub-shell 1 are contacted and connected.

So arranged, the bottoms 13 of all the sub-shells 1 are contacted and connected, all the side coamings 12 are spliced to form an integral side wall, and all the bottoms 13 are spliced to form an integral bottom wall.

It should be noted that, the outer surfaces of the main body plate 11, the side wall plate 12 and the bottom 13 are all plate-shaped structures, and specifically, the side wall plate 12 and the bottom 13 may be vertically and fixedly connected with the main body plate 11.

In another preferred embodiment, in each sub-shell 1, along the first direction, two opposite sides of the main body plate 11 are respectively provided with a receiving cavity, that is, two sides of the main body plate 11 are respectively provided with a receiving cavity, and the main body plate 11 is located at the middle position of the side coaming 12.

So set up, not only each divide the structure of shell 1 be difficult for yielding, moreover because the holding chamber homoenergetic of main part board 11 both sides is fixed a position and is held electric core 5, conveniently before dividing the concatenation of shell 1, place electric core 5 in the space of main part board 11 both sides earlier and accurate bonding to main part board 11, electric core 5 has been preliminary location when dividing the concatenation operation of shell 1 like this, is favorable to the whole equipment process of battery module to be operated more easily.

In particular, it is preferable that two battery cells 5 be accommodated between two adjacent body plates 11, because the number of battery cells 5 accommodated in each accommodation chamber is not limited to this. Therefore, each battery cell 5 can be in surface contact with the main body plate 11, good heat dissipation effect is guaranteed, the number of the sub-shells 1 can be reduced to a certain extent, and the control of cost is facilitated.

Based on the above battery case, the embodiment of the application further provides a battery module, which comprises the battery cells 5, the PCB board 6 and the battery case, wherein the battery cells 5 are arranged in all the accommodating cavities, and each battery cell 5 is provided with a tab 51, and the tab 51 is electrically connected with the PCB board 6. The battery module has the above battery case, so the beneficial effects of the battery module brought by the battery case are shown in the above description, and will not be described herein.

In a preferred embodiment, as shown in fig. 4, the battery module further includes a back plate 7, where the back plate 7 is located on the outer side surface of the battery case and is thermally connected to all the first heat conductive sheets 16, and specifically, the back plate 7 is abutted to all the first heat conductive sheets 16 or connected through a thermally conductive silica gel sheet. The backboard 7 is a metal plate, ensures heat dissipation performance, and the heat-conducting silica gel sheet 8 has heat conduction and insulation effects and can also buffer and absorb shock.

So set up, backplate 7 cooperatees with whole conducting strip structure, has constructed the good heat conduction path of thermal conductivity, has further promoted the radiating effect to electric core 5.

In a specific embodiment, the battery module is provided with end plates 2 which are clamped at both ends of all battery cases in the first direction. The end plate 2 opposite to the plug body 14 is provided with a positioning hole for the plug body 14 to be inserted, the end plate 2 on the other side can be adhered and fixed in an auxiliary manner, and the binding belt 3 is sleeved around all the sub-shells 1 and the end plate 2.

So set up, the space in the branch shell 1 that is located the extreme both ends is fully utilized, seals the space that exposes by end plate 2, and space between end plate 2 and the branch shell 1 also can set up electric core 5.

In order to facilitate the serial-parallel connection of the battery cells 5 in the battery case, as above, each sub-case 1 is open, and the height of the sub-case 1 is lower than the tab 51 of the battery cell 5.

In a more specific embodiment, as shown in fig. 3, the battery case further includes a cover body 4 covering the openings of all the sub-cases 1, and the cover body 4 is connected with the battery case and covers the PCB board 6, so as to realize the totally-enclosed coating of the battery cells 5.

A binding belt 3 sleeved on the outer side of the battery shell is further arranged.

Further, the battery module further comprises sampling sheets, the lugs 51 of the adjacent battery cells 5 are lapped and welded and fixed, and the sampling sheets are respectively connected with the lugs 51 and the PCB 6.

So set up, need not the busbar, can reduce battery module's resistance, improve battery module's energy density and power density, reduced battery module's weight and volume simultaneously, improved the security and the reliability of group battery.

The basic principles of the present application have been described above in connection with specific embodiments, but it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are merely examples and not intended to be limiting, and these advantages, benefits, effects, etc. are not to be construed as necessarily possessed by the various embodiments of the application. Furthermore, the specific details disclosed herein are for purposes of illustration and understanding only, and are not intended to be limiting, as the application is not necessarily limited to practice with the above described specific details.

The block diagrams of the devices, apparatuses, devices, systems referred to in the present application are only illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be made in the manner shown in the block diagrams. As will be appreciated by one of skill in the art, the devices, apparatuses, devices, systems may be connected, arranged, configured in any manner. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used herein refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.

It is also noted that in the apparatus, devices and methods of the present application, the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present application.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

It should be understood that the terms "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are used for more clearly describing the technical solutions, and are not intended to limit the scope of the present application.

The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit embodiments of the application to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.

Claims (10)

1. A battery case characterized by comprising a plurality of sub-cases (1) aligned and spliced in a first direction, the sub-cases (1) comprising:

A main body plate (11);

The side surrounding plates (12), the two side surrounding plates (12) are respectively connected to the edges of the two opposite sides of the main body plate (11), and at least one accommodating cavity is formed by enclosing the side surrounding plates (12) and the main body plate (11);

The first heat conducting fin (16), at least one side wall board (12) is provided with the first heat conducting fin (16), and the first heat conducting fin (16) is located the surface of side wall board (12) far away from the holding chamber.

2. The battery case according to claim 1, wherein the first heat conductive sheet (16) is provided with at least one notch (18) penetrating along the first direction, the side wall plate (12) is provided with at least one groove (121) penetrating along the first direction, and the notches (18) are arranged in one-to-one correspondence with the grooves (121).

3. The battery case according to claim 2, wherein two notches (18) are provided on the first heat conductive sheet (16) at intervals along the third direction, and the first heat conductive sheet (16) is divided into a first region, a second region and a third region in this order equally, and the two notches (18) are located in the first region and the third region, respectively.

4. The battery case according to claim 1, wherein the sub-case (1) further includes a second heat conductive sheet (17), the second heat conductive sheet (17) is provided on a face of the main body plate (11) facing the accommodating chamber, and the second heat conductive sheet (17) and the first heat conductive sheet (16) are integrally connected, the second heat conductive sheet (17) and the first heat conductive sheet (16) being integrally formed with the sub-case (1).

5. Battery housing according to claim 1, characterized in that the side wall plate (12) is provided with a plug body (14) and a plug hole (15), and the plug body (14) of any sub-housing (1) is plugged in the plug hole (15) of the adjacent sub-housing (1).

6. Battery housing according to claim 1, characterized in that the sub-housing (1) further comprises a bottom (13), the bottom (13) being connected to the edge of the main body plate (11) and being located between the side rails (12) on both sides, the side rails (12) of all the sub-housings (1) being in contact and connected between the bottom (13) of all the sub-housings (1).

7. Battery housing according to claim 1, characterized in that in the first direction, the two sides of the body plate (11) facing away are provided with a respective receiving cavity.

8. A battery module, characterized by comprising an electric core (5), a PCB board (6) and a battery case according to any one of claims 1-7, wherein a plurality of electric cores (5) are arranged in all the accommodating cavities, each electric core (5) is provided with a tab (51), and the tab (51) is electrically connected with the PCB board (6).

9. The battery module of claim 8, further comprising:

The backboard (7) is positioned on the outer side surface of the battery shell and is in butt joint with all the first heat conducting fins (16) or connected with the first heat conducting fins through heat conducting silica gel sheets;

end plates (2) provided with two and sandwiched at opposite sides of the battery case in the first direction;

The cover body (4) is connected with the battery shell and is covered on the PCB (6);

the ribbon (3), ribbon (3) cover is established the outside of battery case.

10. The battery module according to claim 8, further comprising sampling tabs, which are connected to the tabs (51) and the PCB (6) respectively, overlap between the tabs (51) of the adjacent cells (5).