CN217691476U

CN217691476U - Battery module frame construction, battery module and battery package

Info

Publication number: CN217691476U
Application number: CN202221848141.5U
Authority: CN
Inventors: 於洪将; 马姜浩; 金佺良; 杨秋立; 占杨娇
Original assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Current assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Priority date: 2022-07-18
Filing date: 2022-07-18
Publication date: 2022-10-28
Anticipated expiration: 2032-07-18

Abstract

The embodiment of the utility model provides a battery module frame construction, battery module and battery package belongs to power battery technical field. The battery module frame structure includes two rims and at least one center. The center is the structure of falling T shape, and the center includes the division board and sets up two loading boards in division board thickness direction both sides. The frame is L type structure, and the frame includes curb plate and the bottom plate of perpendicular connection. When the number of the middle frame is one, the two frames are symmetrically arranged on two sides of the middle frame, and the bottom plates of the two frames are respectively connected with the two bearing plates. When the number of the middle frames is more than or equal to two, the two frames are arranged oppositely, all the middle frames are arranged between the two frames side by side, the bottom plates of the two frames are respectively connected with the bearing plates of the two middle frames positioned at two sides, and the bearing plates of the two adjacent middle frames are connected with each other. And a mounting cavity for mounting the battery cell is formed between the side plate and the partition plate opposite to the side plate and/or between two opposite partition plates. Modular assembly can be achieved.

Description

Battery module frame construction, battery module and battery package

Technical Field

The utility model relates to a power battery field particularly, relates to a battery module frame construction, battery module and battery package.

Background

With the development of technology, the application range of power batteries is wider and wider, and the power batteries relate to production or life. The power battery is also called a secondary battery, and is a rechargeable battery. Power batteries are widely used. Low capacity power batteries may be used for small electric vehicles and high capacity power batteries may be used for large electric vehicles, such as hybrid vehicles or electric vehicles. When the power batteries are used in a group, the power batteries are required to be connected in series or in parallel by using a bus bar. The bus bars are typically welded to the positive and negative poles of the power cell. Each power battery comprises a plurality of battery modules. Each battery module includes a plurality of unit cells, and end plates and side plates for fixing the plurality of unit cells. The end plates and the side plates are disposed around all the unit cells.

Among the prior art, install electric core earlier and form a plurality of independent battery module in a plurality of independent battery module frames, form the battery package with a plurality of independent battery module assembly again to, the space that leads to the battery module occupies greatly, is unfavorable for improving the energy density of battery package. Simultaneously, current battery module degree is low, and the assembly is comparatively troublesome.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery module frame construction, battery module and battery package, its space that can reduce battery module frame construction occupies to can improve the energy density of battery package. Simultaneously, can make the modularization degree of battery module improve to can improve the assembly efficiency of battery module.

The embodiment of the utility model is realized like this:

in a first aspect, the present invention provides a battery module frame structure, which includes two side frames and at least one middle frame;

the middle frame comprises a partition plate and two bearing plates arranged on two sides of the partition plate in the thickness direction;

the frame comprises a side plate and a bottom plate which are vertically connected;

when the number of the middle frames is one, the two frames are symmetrically arranged on two sides of the middle frame, and the bottom plates of the two frames are respectively connected with the two bearing plates;

when the number of the middle frames is more than or equal to two, the two frames are oppositely arranged, all the middle frames are arranged between the two frames side by side, the bottom plates of the two frames are respectively connected with the bearing plates of the two middle frames positioned at two sides, and the bearing plates of the two adjacent middle frames are mutually connected;

and a mounting cavity for mounting the battery cell is formed between the side plate and the partition plate opposite to the side plate and/or between two opposite partition plates.

In an optional embodiment, a first flow channel for a heat exchange medium to flow is arranged in the bottom plate; and/or;

a second flow channel for heat exchange media to flow is arranged in the side plate; and/or;

a third flow channel for a heat exchange medium to flow is arranged in the partition plate; and/or;

and a fourth flow channel for flowing of a cooling medium is arranged in the bearing plate.

In an optional embodiment, a first flow channel for flowing a heat exchange medium is arranged in the bottom plate, a second flow channel for flowing the heat exchange medium is arranged in the side plate, a first liquid inlet and a first liquid outlet are arranged on the bottom plate and/or the side plate, and the first flow channel and the second flow channel are both communicated with the first liquid inlet and the first liquid outlet;

a third flow channel for flowing of a heat exchange medium is arranged in the separation plate, a fourth flow channel for flowing of a cooling medium is arranged in the bearing plate, and a second liquid inlet and a second liquid outlet which are communicated with the third flow channel and the fourth flow channel are arranged on the bearing plate and/or the separation plate.

In an optional embodiment, the module frame structure further includes a plurality of end plates, and each of the plurality of end plates is disposed between the side plate and the partition plate opposite thereto or between two partition plates opposite thereto, so as to close both ends of the installation cavity.

In an optional embodiment, the module frame structure further includes an upper cover, the upper cover is disposed on the middle frame and the side frame, and the upper cover is used for performing safety protection on the top of the battery cell.

In an alternative embodiment, the bottom plate and the adjacent carrier plate and the two adjacent carrier plates are connected by welding.

In a second aspect, the present invention provides a battery module, including any one of a plurality of electric cores and the aforementioned embodiments the battery module frame structure, it is a plurality of the electric cores install side by side in the installation cavity.

In an optional embodiment, the battery module further includes a plurality of heat insulation pads, and the plurality of heat insulation pads are respectively disposed between two adjacent electric cores.

In an alternative embodiment, a heat conduction layer is arranged on the bottom wall of the mounting cavity, and a plurality of the battery cells are carried in the heat conduction layer side by side; and/or a heat-conducting adhesive layer is arranged between the side wall of the mounting cavity and the side wall of the battery core.

In a third aspect, the present invention provides a battery pack including the battery module according to any one of the above embodiments.

The embodiment of the utility model provides a battery module frame construction, battery module and battery package's beneficial effect includes:

this application sets the frame module of L shape and the center module of falling T shape through the frame construction with battery module to make battery module's modularization degree reinforcing, the frame module of two L shapes of the quantity accessible of battery module and the center module of one or more falling T shape conveniently form the battery module that the battery package is required. Secondly, because the division board of the middle frame module of shape of falling T is two adjacent industrial lateral walls of installation cavity simultaneously to can reduce battery module frame construction and to the occupation in space, thereby be favorable to improving battery module's energy density.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a battery module according to an embodiment of the present invention;

fig. 2 is a schematic structural view of the battery module according to the embodiment of the present invention, in which the upper cover is removed;

fig. 3 is a schematic diagram illustrating an explosion structure of a battery module according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a partial explosion of a frame structure of a battery module according to an embodiment of the present invention;

fig. 5 is a schematic cross-sectional view of a frame and a middle frame of a battery module frame provided in an embodiment of the present invention.

The diagram is 100-battery module frame structure; 110-a frame; 111-side plates; 113-a backplane; 115-a first detent; 117 — first flow path; 119-a second flow channel; 121-a first liquid inlet; 123-a first liquid outlet; 125-rivet hole; 127-a mounting block; 129-mounting holes; 130-middle frame; 131-a separator plate; 133-a carrier plate; 135-a second positioning groove; 137-a third flow channel; 139-a fourth flow channel; 140-a mounting cavity; 141-a second liquid inlet; 143-a second outlet; 151-end plate; 153-angle iron; 160-a circulation line; 170-upper cover; 171-a snap-fit structure; 173-a card slot; 175-buckling; 300-a battery module; 310-electric core; 320-a bus; 330-signal acquisition board; 340-insulation mat.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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.

Referring to fig. 1, an object of the present invention is to provide a battery module frame structure 100, a battery module 300 and a battery pack, which can reduce the space occupation of the frame of the battery module 300, thereby improving the energy density of the battery pack. Meanwhile, it can improve the modularization degree of the battery module 300, so that the assembly efficiency of the battery module 300 can be improved.

Referring to fig. 1 and 2, an embodiment of the present invention provides a battery pack, which includes a battery module 300. The battery module 300 includes a battery module frame structure 100 and a plurality of battery cells 310 disposed within the frame of the battery module 300. It is possible to reduce the space occupation of the battery module frame structure 100, so that the energy density of the battery pack can be improved. Meanwhile, the degree of modularization of the battery module 300 can be improved, so that the assembly efficiency of the battery module 300 can be improved.

Referring to fig. 2, 3 and 4, in the present embodiment, the battery module frame structure 100 includes two side frames 110 and a middle frame 130. The middle frame 130 has an inverted T-shaped structure, and the middle frame 130 includes a partition plate 131 and two support plates 133 disposed on two sides of the partition plate 131 in the thickness direction. The frame 110 is an L-shaped structure, and the frame 110 includes a side plate 111 and a side plate 111 that are vertically connected. The two frames 110 are symmetrically disposed on two sides of the middle frame 130, and the bottom plates 113 of the two frames 110 are respectively connected to the two bearing plates 133. Two mounting cavities 140 are formed between the side plates 111 of the two side frames 110 and the partition plates 131 opposite thereto, respectively. A plurality of battery cells 310 are arranged side by side in two installation cavities 140.

In the present embodiment, the frame structure of the battery module 300 is configured into the L-shaped frame 110 module and the inverted T-shaped middle frame 130 module, so that the modularity of the battery module 300 is enhanced, and the number of the battery modules 300 can conveniently form the battery modules 300 required by the battery pack through two L-shaped frame 110 modules and one or more inverted T-shaped middle frame 130 modules. Secondly, since the partitions 131 of the inverted T-shaped middle frame 130 module are sidewalls for two adjacent mounting cavities 140, the space occupied by the battery module frame structure 100 can be reduced, which is advantageous to increase the energy density of the battery module 300.

In other embodiments of the present application, the number of the middle frames 130 is N, where N is a positive integer greater than or equal to two, the two side frames 110 are disposed oppositely, all the middle frames 130 are disposed between the two side frames 110 side by side, the bottom plates 113 of the two side frames 110 are connected to the supporting plates 133 of the two middle frames 130 located at two sides, and the supporting plates 133 of the two adjacent middle frames 130 are connected to each other. The side plate 111 and the partition plate 131 opposite thereto and the two partition plates 131 opposite thereto form N +1 mounting cavities 140 in total. For example, when the battery pack needs three modules, two middle frames 130 and two side frames 110 are selected, the two side frames 110 are oppositely arranged, and the two middle frames 130 are arranged between the two side frames 110 side by side, so that the two middle frames 130 and the two side frames 110 are enclosed to form three installation cavities 140 for installing the battery cell 310.

The two side frames 110 are disposed opposite to each other, and the bottom plates 113 of the two side frames 110 face between the two side frames 110.

In this embodiment, the adjacent bottom plate 113 is connected to the carrier plate 133 and the two adjacent carrier plates 133 by welding.

In this embodiment, the end surface of the bottom plate 113 along the length direction is provided with a first positioning groove 115, and the bearing plate 133 along the length direction is provided with a second positioning groove 135. The first positioning groove 115 overlaps the second positioning groove 135 and is welded integrally by laser welding. In the embodiment, the first positioning groove 115 and the second positioning groove are arranged, so that the frame 110 and the middle frame 130 can be positioned conveniently during assembling before welding.

Referring to fig. 3, 4 and 5, in the present embodiment, a first flow channel 117 through which a heat exchange medium flows is disposed in the bottom plate 113, and a second flow channel 119 through which the heat exchange medium flows is disposed in the side plate 111. A third flow passage 137 through which a heat exchange medium flows is provided in the partition plate 131, and a fourth flow passage 139 through which a cooling medium flows is provided in the carrier plate 133.

This implementation is through setting up first runner 117 and fourth runner 139 to can with set up and carry out the heat transfer in installation cavity 140 electricity core 310 bottom, and set up second runner 119 and third runner 137 so as to can carry out the heat transfer with the lateral wall of electricity core 310, thereby can diversified realization and the heat transfer of electricity core 310.

In this embodiment, the bottom plate 113 is provided with a first liquid inlet 121 and a first liquid outlet 123 at two ends in the length direction, and the first flow channel 117 and the second flow channel 119 are both arranged along the length direction of the frame 110. The first flow passage 117 and the second flow passage 119 are both communicated with the first inlet port 121 and the first outlet port 123. Therefore, the cooling medium can flow into the first flow channel 117 and the second flow channel 119 through the first liquid inlet 121, and flow out of the first liquid outlet 123 after heat exchange, so that thermal management of the battery cell 310 can be better achieved.

Of course, in other embodiments of the present application, the first flow channel 117 and the second flow channel 119 may be independent of each other, and the circulation of the cooling medium may be realized through different liquid inlets and liquid outlets. The first liquid inlet 121 and the first liquid outlet 123 may be disposed on the side plate 111, or one may be disposed on the side plate 111 and the other may be disposed on the bottom plate 113. For example, the first inlet port 121 is provided on the bottom plate 113, and the first outlet port 123 is provided on the side plate 111.

Referring to fig. 3, fig. 4 and fig. 5, in the present embodiment, two sides of one carrier plate 133 of the two carrier plates 133 in the length direction are respectively provided with a second liquid inlet 141 and a second liquid outlet 143 which are communicated with the third flow channel 137 and the fourth flow channel 139.

In other embodiments of the present application, the third flow passage 137 and the fourth flow passage 139 may be independent from each other, and the cooling medium may be circulated through different liquid inlets and outlets.

In this embodiment, the module frame structure further includes a plurality of end plates 151, and two of the end plates 151 are respectively disposed between the side plate 111 and the partition plate 131 opposite thereto or between two of the partition plates 131 opposite thereto, so as to close two ends of the installation cavity 140.

In this embodiment, the module frame structure further comprises angle iron 153, and the end plate 151 is connected to the partition plate 131 through the angle iron 153. The side plate 111 is provided with a rivet hole 125, and the side of the end plate 151 abutting against the side plate 111 is connected to the side plate 111 by a rivet.

In this embodiment, the first inlet port 121, the first outlet port 123, the second inlet port 141, and the second outlet port 143 are disposed outside the end plate 151. The first inlet port 121, the first outlet port 123, the second inlet port 141 and the second outlet port 143 are connected to a circulation line 160. The provision of the first inlet port 121, the first outlet port 123, the second inlet port 141, and the second outlet port 143 outside the end plate 151 facilitates connection of the circulation line 160.

Referring to fig. 3, fig. 4 and fig. 5, in the present embodiment, the battery module 300 further includes a bus bar 320 and a signal collecting plate 330, and the battery cells 310 located in the same mounting cavity 140 are connected in series to form a group through the bus bar 320. The collecting board is connected to the battery cell 310 and is configured to collect parameters such as voltage of the battery cell 310.

In this embodiment, the battery module 300 further includes a plurality of heat insulation pads 340, and the plurality of heat insulation pads 340 are respectively disposed between two adjacent battery cells 310.

In this embodiment, the thermal insulation pad 340 is disposed between two adjacent battery cells 310, so that thermal insulation between the battery cells 310 can be achieved, and mutual influence between two adjacent battery cells 310 is avoided.

In this embodiment, a heat conduction layer (not shown) is disposed on a bottom wall of the mounting cavity 140, the plurality of battery cells 310 are carried in the heat conduction layer side by side, and a heat conduction adhesive layer (not shown) is disposed between the side wall of the mounting cavity 140 and the side wall of the battery cells 310.

In this embodiment, neither the heat conductive layer nor the heat conductive adhesive layer is made of the heat conductive structural adhesive. In other embodiments of the present application, a heat conduction layer may also be formed between the bottom wall of the mounting cavity 140 and the bottom wall of the battery cell 310 by pouring heat conduction silica gel into the mounting cavity 140, and a heat conduction glue layer is formed between the side wall of the battery cell 310 and the side wall of the mounting cavity 140.

In this embodiment, the heat exchange efficiency between the battery cell 310 and the side frame 110 and the middle frame 130 can be improved by providing the heat conductive layer and the heat conductive adhesive layer.

In this embodiment, the battery module frame structure 100 further includes a plurality of upper covers 170, the upper covers 170 are disposed in the mounting cavities 140 in a one-to-one correspondence, and the upper covers 170 are used for performing safety protection on the tops of the battery cells 310.

In this embodiment, the end plate 151 is provided with a clamping structure 171, the clamping interface has a clamping groove 173, the upper cover 170 is provided with a clamping buckle 175, and the clamping buckle 175 is inserted into the clamping groove 173 to fix the end plate 151 and the upper cover 170 together.

In other embodiments of the present application, the number of the upper covers 170 may be one, and the openings at the tops of the plurality of installation cavities 140 are closed by the upper covers 170. It follows that the present embodiment does not limit the number of the upper covers as long as it can close the upper opening.

In this embodiment, the side of the side plate 111 remote from the bottom plate 113 is provided with a mounting block 127, the mounting block 127 is provided with a mounting hole 129, and the mounting hole 129 is used for a fastener to pass through to fix the module frame structure.

The embodiment of the utility model provides a battery module frame construction 100, battery module 300 and battery package's beneficial effect includes:

this application is through setting battery module frame construction 100 to the frame 110 module of L shape and the center 130 module of the shape of falling T to make battery module 300's modularization degree reinforcing, the frame 110 module of the frame of two L shapes of the quantity accessible of battery module 300 and the center 130 module of one or more shapes of falling T conveniently form the battery module 300 that the battery package needs. Secondly, because the partition plate 131 of the inverted T-shaped middle frame 130 module is a side wall for two adjacent installation cavities 140, the space occupation of the battery module frame structure 100 can be reduced, which is beneficial to improving the energy density of the battery module 300.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. 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 present invention.

Claims

1. A battery module frame structure is characterized by comprising two side frames and at least one middle frame;

and a mounting cavity for mounting the battery cell is formed between the side plate and the partition plate opposite to the side plate and/or between the two opposite partition plates.

2. The battery module frame structure according to claim 1, wherein a first flow channel for a heat exchange medium to flow is provided in the bottom plate; and/or;

3. The battery module frame structure according to claim 1, wherein a first flow channel for flowing a heat exchange medium is provided in the bottom plate, a second flow channel for flowing a heat exchange medium is provided in the side plate, a first liquid inlet and a first liquid outlet are provided on the bottom plate and/or the side plate, and the first flow channel and the second flow channel are both communicated with the first liquid inlet and the first liquid outlet;

4. The battery module frame structure according to claim 1, further comprising a plurality of end plates, the plurality of end plates being disposed in pairs between the side plates and the partition plates opposite thereto or between two partition plates opposite thereto, respectively, to close both ends of the mounting cavity.

5. The battery module frame structure of claim 4, further comprising an upper cover disposed on the middle frame and the side frame, wherein the upper cover is used for protecting the top of the battery cell.

6. The battery module frame structure according to any one of claims 1 to 4, wherein the bottom plate and the carrier plate adjacent thereto and two adjacent carrier plates are connected by welding.

7. A battery module comprising a plurality of cells and the battery module frame structure of any of claims 1-6, wherein the plurality of cells are mounted side-by-side in the mounting cavity.

8. The battery module according to claim 7, further comprising a plurality of heat insulation pads, wherein the plurality of heat insulation pads are respectively disposed between two adjacent battery cells.

9. The battery module according to claim 7, wherein the bottom wall of the mounting cavity is provided with a heat conduction layer, and a plurality of the battery cells are carried in the heat conduction layer side by side; and/or a heat-conducting adhesive layer is arranged between the side wall of the mounting cavity and the side wall of the battery core.

10. A battery pack comprising the battery module according to any one of claims 7 to 9.