CN219419291U

CN219419291U - Combined battery box

Info

Publication number: CN219419291U
Application number: CN202320507449.1U
Authority: CN
Inventors: 桂昊; 张莉娟; 杜俊丰; 程振醒; 金佺良
Original assignee: Jiangsu Zenergy Battery Technologies Co Ltd
Current assignee: Jiangsu Zenergy Battery Technologies Co Ltd
Priority date: 2023-03-16
Filing date: 2023-03-16
Publication date: 2023-07-25
Anticipated expiration: 2033-03-16

Abstract

The utility model provides a composite battery box, which relates to the technical field of batteries and comprises a shell, wherein a containing cavity for containing a battery module is arranged in the shell, and a nano injection layer is at least partially arranged on the inner side surface and/or the outer side surface of the shell and is used for electrically isolating the containing cavity from an external space and blocking heat transfer between the containing cavity and the external space. The structural support is realized by replacing a part of metal material by the nano injection molding layer, so that the thickness of the metal material of the battery shell is reduced under the condition that the structural strength of the battery shell is stable, the weight of the battery shell and the battery pack is further reduced, meanwhile, the nano injection molding layer can be used for electrically isolating the accommodating cavity and the external space, the insulating property of the battery pack is improved, and the nano injection molding layer is also used for blocking heat transfer between the accommodating cavity and the external space, so that heat transfer inside and outside the battery pack is blocked, and the heat insulation property of the battery pack is improved.

Description

Combined battery box

Technical Field

The utility model relates to the technical field of batteries, in particular to a composite battery box.

Background

With industry development, requirements on energy density performance and safety of batteries are continuously improved. In the prior art, most of the battery shells are made of metal materials, such as high-strength steel, aluminum alloy and the like, and the battery shells are used as main bearing components, so that the battery shells have strong structural strength, and therefore, a certain thickness is required, so that the weight of the battery shells is heavy, the structural strength of the battery shells can be possibly influenced when the battery shells are directly thinned, and therefore, the design of the battery shells with light weight is more challenging. Meanwhile, the metal battery shell is high in heat conduction efficiency, the heat insulation performance of the battery pack is reduced, and the battery shell has certain electric conduction performance, so that the overall insulation performance of the battery pack is influenced.

Disclosure of Invention

The utility model aims to provide a composite battery box and a battery pack, which can realize weight reduction of a battery shell, can not influence the structural strength of the battery shell, and improve the insulation and heat preservation performance of the battery pack.

Embodiments of the present utility model are implemented as follows:

the embodiment of the utility model provides a composite battery box, which comprises a shell, wherein a containing cavity for containing a battery module is arranged in the shell, a nano injection molding layer is at least partially arranged on the inner side surface and/or the outer side surface of the shell, and the nano injection molding layer is used for electrically isolating the containing cavity from an external space and blocking heat transfer between the containing cavity and the external space.

In an alternative embodiment, the shell comprises a bottom plate and two pairs of side coamings, the two pairs of side coamings are arranged on the edge of the bottom plate in a surrounding mode to jointly construct the accommodating cavity, and the nano injection molding layer is arranged at least on the inner sides of one pair of side coamings.

In an alternative embodiment, the nano injection molding layer is configured on the inner side surface and/or the outer side surface of the shell in a mode of filling injection molding grooves, the injection molding grooves comprise first wall surfaces parallel to the plane of the shell, and a plurality of inverted trapezoid protruding parts are arranged at intervals in a protruding mode on the first wall surfaces.

In an alternative embodiment, the injection molding groove further comprises a second wall surface arranged along the thickness direction of the shell, and the side coaming and/or the bottom plate form an abutting part to abut against the second wall surface.

In an alternative embodiment, an extension extending along the side wall thickness direction is further provided on the abutting portion formed by the second wall surface and the side wall plate.

In an alternative embodiment, the side wall plate is T-shaped or bent.

In an alternative embodiment, the injection molding groove comprises a first groove body arranged on the inner side of the shell and arranged on the bottom plate and a second groove body arranged on the side coaming at intervals, at least one pair of mounting tables are arranged at the joint of the first groove body and the second groove body in a protruding mode, the mounting tables are at least fixed on the bottom plate, and the mounting tables are used for assembling and penetrating through connecting pieces fixed on the battery module.

In an alternative embodiment, the injection molding groove comprises a first groove body and a second groove body, wherein the first groove body and the second groove body are communicated with each other, and the second groove body is arranged on the bottom plate and the side coaming, so that at least one nano injection molding sealing cavity is formed on the inner side and/or the outer side of the shell.

In an alternative embodiment, the depth of the injection molded groove is less than 80% of the thickness of the housing.

In an alternative embodiment, the bottom plate is provided with an assembly area, a nano injection molding layer is arranged in the assembly area, the battery module is adhered to the nano injection molding layer through an adhesive layer, and the assembly area is surrounded by a limiting raised line protruding from the bottom plate.

The beneficial effects of the embodiment of the utility model include:

the utility model provides a composite battery box and a battery pack, wherein a nano injection layer is arranged on the inner side surface and/or the outer side surface of a shell, and the nano injection layer is used for replacing a part of metal materials to realize structural support, so that the thickness of the metal materials of the battery shell is reduced under the condition that the structural strength of the battery shell is stable, the weight of the battery shell and the battery pack is further reduced, meanwhile, the nano injection layer can be used for electrically isolating a containing cavity from an external space, the insulating property of the battery pack is improved, and the nano injection layer is also used for blocking heat transfer between the containing cavity and the external space, so that the heat transfer inside and outside the battery pack is blocked, and the heat preservation performance of the battery pack is improved. Compared with the prior art, the composite battery box provided by the utility model can realize weight reduction of the battery shell, can not influence the structural strength of the battery shell, and improves the insulation and heat preservation performance of the battery pack.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a composite battery box according to a first embodiment of the present utility model;

fig. 2 is a schematic diagram of an assembly structure of a composite battery box according to a first embodiment of the present utility model;

fig. 3 is a schematic partial cross-sectional view of a composite battery case according to a first embodiment of the present utility model;

FIG. 4 is an enlarged schematic view of a portion of IV of FIG. 3;

fig. 5 is a sectional view showing an assembled structure of a composite battery case according to a first embodiment of the present utility model;

FIG. 6 is an enlarged schematic view of a portion of VI of FIG. 5;

fig. 7 is a schematic structural diagram of a composite battery box according to a second embodiment of the present utility model;

FIG. 8 is a schematic diagram of a composite battery box according to another preferred embodiment of the present utility model;

fig. 9 is a schematic structural diagram of a composite battery box according to a third embodiment of the present utility model;

fig. 10 is a schematic structural diagram of a composite battery box according to a fourth embodiment of the present utility model;

fig. 11 is a schematic diagram of an assembly structure of a composite battery case according to a fourth embodiment of the present utility model.

Icon:

100-a composite battery box; 110-a housing; 111-a bottom plate; 113-side coaming; 115-a holding portion; 117-extension; 130-nano injection molding layer; 150-injection molding grooves; 151-a first wall; 153-inverted trapezoidal shaped protrusions; 155-a second wall; 157-a first tank; 159-a second tank; 170-a mounting table; 171-a connector; 190-assembly area; 191-limit convex strips; 200-battery module.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model 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 utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its 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 utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "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; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

First embodiment

Referring to fig. 1 and 2, the present embodiment provides a composite battery box 100, which can reduce the weight of a battery case 110, and improve the insulation and heat preservation performance of a battery pack without affecting the overall structural strength.

The composite battery box 100 provided in this embodiment includes a housing 110, a receiving cavity for receiving the battery module 200 is provided in the housing 110, a nano injection molding layer 130 is provided on at least a part of an inner side surface and/or an outer side surface of the housing 110, and the nano injection molding layer 130 is used for electrically isolating the receiving cavity from an external space and blocking heat transfer between the receiving cavity and the external space.

In this embodiment, the battery module 200 may be a single battery or a battery module, and preferably, the battery module 200 is a battery module in this embodiment, and the battery module 200 is installed in the housing 110 and is adhered by an adhesive layer. According to the embodiment, the nano injection molding layer 130 is arranged on the inner side surface and/or the outer side surface of the shell 110, structural support is achieved by replacing a part of metal materials through the nano injection molding layer 130, so that the thickness of the metal materials of the battery shell 110 is reduced under the condition that the structural strength of the battery shell 110 is stable, the weight of the battery shell 110 and the battery pack is further reduced, meanwhile, the nano injection molding layer 130 can be used for electrically isolating the accommodating cavity from the outer space, the insulating performance of the battery pack is improved, and the nano injection molding layer 130 is also used for blocking heat transfer between the accommodating cavity and the outer space, so that heat transfer inside and outside the battery pack is blocked, and the heat preservation performance of the battery pack is improved.

Referring to fig. 3 to 6 in combination, in the present embodiment, the nano injection molding layer 130 is configured on the inner side surface and/or the outer side surface of the housing 110 by filling the injection molding groove 150, and the injection molding groove 150 includes a first wall surface 151 parallel to the plane of the housing 110, and the first wall surface 151 is convexly provided with a plurality of inverted trapezoidal protrusions 153 arranged at intervals. Specifically, in this embodiment, the nano injection layer 130 is configured on the inner side surface of the housing 110, and the inverted trapezoidal protruding portion 153 can be embedded into the nano injection layer 130, so that the nano injection layer 130 is tightly attached to the inner side surface of the housing 110, and the falling off or layering phenomenon is avoided.

The housing 110 includes a bottom plate 111 and two pair of side enclosures 113, the two pair of side enclosures 113 are enclosed at edges of the bottom plate 111 to jointly construct a receiving cavity, and the nano injection-molded layer 130 is disposed at least on inner sides of the pair of side enclosures 113. Specifically, the two side surrounding plates 113 are both straight plates, so as to form a rectangular accommodating cavity, however, the shape of the accommodating cavity is merely illustrative, and in other preferred embodiments of the present utility model, the bottom plate 111 and the side surrounding plates 113 may also enclose a cylindrical accommodating cavity or a diamond-shaped accommodating cavity.

It should be noted that the nano injection molding layer 130 is disposed on the inner sides of the two opposite side enclosures 113 and on the bottom plate 111 in this embodiment, specifically, the nano injection molding layer 130 is disposed on the entire inner side surface of the housing 110, so that better coverage and better heat insulation and insulation effects can be achieved.

Further, the injection molding groove 150 further includes a second wall surface 155 provided along the thickness direction of the housing 110, and the side wall 113 and/or the bottom plate 111 form an abutting portion 115 to abut against the second wall surface 155. Specifically, the injection molding grooves 150 in the present embodiment are distributed on the side wall 113 and the bottom plate 111, and the side wall 113 is formed with the abutting portion 115, and the abutting portion 115 engages with the second wall 155.

In this embodiment, an extension portion 117 extending along the thickness direction of the side wall 113 is further provided on the abutting portion 115 formed by the second wall 155 and the side wall 113. Specifically, the extension 117 is located at an edge position of the second wall 155, and can limit the edge of the nano injection layer 130.

In the present embodiment, the side wall plate 113 has a bent shape. Specifically, the cross-sectional shape of the side wall plate 113 in this embodiment may be a bent shape and bent inward, so that the nano injection-molded layer 130 can be formed on the inner side surface of the side wall plate 113.

In this embodiment, the depth of the injection molding groove 150 is less than 80% of the thickness of the housing 110. The depth of the injection molding groove 150 can be determined according to the material and the actual strength requirement of the housing 110, when the depth of the injection molding groove 150 is smaller, the structural strength of the injection molding groove 150 can be better ensured, and when the depth of the injection molding groove 150 is larger, the nano injection molding layer 130 can be ensured to have enough thickness so as to realize better insulation and heat insulation functions.

In this embodiment, the injection molding groove 150 includes a first groove body and a second groove body that are communicated with each other and disposed on the bottom plate 111, so as to form at least one nano injection molding sealing cavity on the inner side and/or the outer side of the housing 110. Specifically, the first and second grooves are both on the inner side of the housing 110, thereby ensuring that the nano injection-molded layer 130 is formed on the inner side surface of the housing 110.

In summary, the present utility model provides a composite battery case 100, by disposing the nano injection molding layer 130 on the inner side surface of the housing 110, and replacing a part of metal material with the nano injection molding layer 130 to realize structural support, so that the thickness of the metal material of the battery housing 110 is reduced under the condition that the structural strength of the battery housing 110 is stable, thereby reducing the weight of the battery housing 110 and the battery pack, and meanwhile, the nano injection molding layer 130 can be used for electrically isolating the accommodating cavity from the external space, improving the insulation performance of the battery pack, and the nano injection molding layer 130 is also used for blocking the heat transfer between the accommodating cavity and the external space, so that the heat transfer inside and outside the battery pack is blocked, and the heat insulation performance of the battery pack is improved.

Second embodiment

The present embodiment provides a composite battery case 100, which has the same basic structure and principle and technical effects as those of the first embodiment, and for brevity, reference is made to the corresponding contents of the first embodiment where the description of the embodiment is not mentioned.

Referring to fig. 7, in the present embodiment, both the inner and outer surfaces of the case 110 are provided with the nano injection-molded layer 130. Specifically, the nano-injection-molded layer 130 is configured to the inner and outer side surfaces of the case 110 by filling the injection-molded groove 150.

In this embodiment, the cross-sectional shape of the side wall 113 is T-shaped, so that the nano injection-molded layer 130 can be filled and formed on both the inner side surface and the outer side surface of the side wall 113.

It should be noted that, in other preferred embodiments of the present utility model, the nano-injection-molded layer 130 may be disposed only on the outer side surface of the housing 110, i.e. the nano-injection-molded layer 130 is configured on the outer side surface of the housing 110 by filling the injection-molded groove 150, as shown in fig. 8.

The composite battery box 100 provided in this embodiment can make the heat insulation and the insulation effect better by arranging the nano injection molding layer 130 on the inner side surface and the outer side surface of the housing 110.

Third embodiment

Referring to fig. 9, in the present embodiment, the injection molding groove 150 includes a first groove body 157 and a second groove body 159 disposed inside the casing 110 and disposed at the bottom plate 111 at intervals, at least a pair of mounting tables 170 are protruded from the connection between the first groove body 157 and the second groove body 159, the mounting tables 170 are at least fixed to the bottom plate 111, and the mounting tables 170 are used for assembling the connection members 171 that are fixed to the battery module 200. Specifically, screw holes are formed in the mounting table 170, and the connection members 171 may be bolts, which pass through the battery module 200 and are screw-fitted in the screw holes, thereby fixing the battery module 200.

It should be noted that, in this embodiment, the mounting table 170 is integrally disposed at the connection portion between the bottom plate 111 and the side wall 113, and the opening of the screw hole faces upward, so as to facilitate the insertion of the bolt. Of course, in other preferred embodiments of the present utility model, the connection member 171 may be other structural members such as pins or bolts, which are not limited herein.

The composite battery box provided in this embodiment, through setting up mount table 170 to combine connecting piece 171 can realize the fixed of battery module 200, fixed effectual, make whole battery package structure more stable. And the pressure is applied to the battery module 200 through the bolts, so that the battery module 200 and the nano injection molding layer 130 are attached to each other, and the heat insulation effect is better.

Fourth embodiment

Referring to fig. 10 and 11, in the present embodiment, the base plate 111 is provided with an assembly area 190, the nano injection molding layer 130 is disposed in the assembly area 190, and the battery module is adhered to the nano injection molding layer 130 through an adhesive layer, wherein the assembly area 190 is surrounded by a limiting protrusion 191 protruding from the base plate 111. Specifically, the limiting protruding strips 191 are surrounded to form the injection molding groove 150, so that the nano injection molding layer 130 is only covered in the assembly area 190, and the distribution range of the assembly area 190 is matched with that of the battery module 200, so that the heat insulation and insulation characteristics are more targeted, and the structural stability of the area without the assembly of the battery module 200 can be ensured.

Fifth embodiment

The present embodiment provides a battery pack including a battery module 200 and a composite battery case 100, the basic structure and principle of the composite battery case 100 and the technical effects thereof are the same as those of the first embodiment, and for brevity, reference is made to the corresponding contents in the first embodiment where the description of the embodiment is not mentioned.

The battery provided in this embodiment includes a top cover, a composite battery box 100 and a battery module 200, where the composite battery box 100 includes a housing 110, a containing cavity for containing the battery module 200 is provided in the housing 110, a nano injection molding layer 130 is at least partially provided on an inner side surface and/or an outer side surface of the housing 110, and the nano injection molding layer 130 is used for electrically isolating the containing cavity from an external space and blocking heat transfer between the containing cavity and the external space. The case 110 has an upward opening through which the battery module 200 is mounted in the case 110, and a top cover is provided at the top of the case 110 and covers the opening, thereby encasing the battery module 200.

Specifically, the nano injection molding layer 130 may be disposed on an inner side surface of the case 110, an outer side surface of the case 110, or both the inner side surface and the outer side surface of the case 110, and the top cover and the case 110 may form a closed accommodating space, thereby realizing the sheathing assembly of the battery module 200.

The embodiment provides a battery pack, through setting up nanometer injection molding layer 130 at the inboard surface and/or the outside surface of shell 110, replace partly metal material through nanometer injection molding layer 130 and realize structural support for the metal material thickness of battery shell 110 is thinned under the circumstances that battery shell 110 structural strength remains stable, and then has reduced the weight of battery shell 110 and battery pack, and nanometer injection molding layer 130 can be used for electric isolation holding chamber and external space simultaneously, has promoted the insulating properties of battery pack, and nanometer injection molding layer 130 still is used for blockking the heat transfer between holding chamber and the external space, makes the heat transfer in the battery pack inside and outside hindered, has promoted the heat preservation performance of battery pack.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a combined type battery box, its characterized in that includes shell (110), be provided with the holding chamber that is used for holding battery module (200) in shell (110), the inboard surface and/or the outside surface of shell (110) are provided with nanometer layer of moulding plastics (130) at least locally, nanometer layer of moulding plastics (130) are used for the electrical isolation holding chamber and external space, and block heat transfer between holding chamber and the external space.

2. The composite battery box according to claim 1, wherein the housing (110) includes a bottom plate (111) and two pairs of side surrounding plates (113), the two pairs of side surrounding plates (113) are surrounded on edges of the bottom plate (111) to jointly construct the accommodating cavity, and the nano injection molding layer (130) is disposed at least on inner sides of the pair of side surrounding plates (113).

3. The composite battery box according to claim 2, wherein the nano injection molding layer (130) is configured on the inner side surface and/or the outer side surface of the housing (110) by filling an injection molding groove (150), the injection molding groove (150) comprises a first wall surface (151) parallel to the plane of the housing (110), and a plurality of inverted trapezoid protruding parts (153) are arranged at intervals and protruding on the first wall surface (151).

4. A composite battery box according to claim 3, wherein the injection molding groove (150) further comprises a second wall surface (155) provided along a thickness direction of the housing (110), and the side wall plate (113) and/or the bottom plate (111) form an abutting part (115) to abut against the second wall surface (155).

5. The composite battery box according to claim 4, wherein the abutting portion (115) formed by the second wall surface (155) and the side wall plate (113) is further provided with an extension portion (117) extending along the thickness direction of the side wall plate (113).

6. The composite battery box according to claim 2, wherein the side wall (113) is T-shaped or bent in shape.

7. A combined battery box according to claim 3, characterized in that the injection molding groove (150) comprises a first groove body (157) communicated with the bottom plate (111) and a second groove body (159) of the side wall plate (113) so as to form at least one nano injection molding sealing cavity on the inner side and/or the outer side of the shell (110).

8. A composite battery box according to claim 3, wherein the injection molding groove (150) comprises a first groove body (157) arranged on the inner side of the shell (110) and a second groove body (159) arranged on the side wall plate (113) at intervals, at least a pair of mounting tables (170) are arranged at the joint of the first groove body (157) and the second groove body (159) in a protruding mode, the mounting tables (170) are at least fixed on the bottom plate (111), and the mounting tables (170) are used for assembling connecting pieces (171) penetrating and fixed on the battery module (200).

9. A composite battery compartment according to claim 3, wherein the depth of the injection molded recess (150) is less than 80% of the thickness of the housing (110).

10. The composite battery box according to claim 2, wherein the bottom plate (111) is provided with an assembly area (190), the assembly area (190) is internally provided with a nano injection molding layer (130), the battery module (200) is adhered to the nano injection molding layer (130) through an adhesive layer, and the assembly area (190) is surrounded by a limit raised line (191) protruding from the bottom plate (111).