CN219873856U

CN219873856U - Battery box, box cover, battery and power utilization device

Info

Publication number: CN219873856U
Application number: CN202321832667.9U
Authority: CN
Inventors: 张洪斌; 李宏磊; 夏庆雷
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-07-13
Filing date: 2023-07-13
Publication date: 2023-10-20
Anticipated expiration: 2033-07-13

Abstract

The utility model relates to a battery box body, a box cover, a battery and an electric device, which comprises a box body and a functional board, wherein the box body is provided with an inner side surface facing to the inner space of the box body, the box body comprises a plastic material part, and the plastic material part participates in enclosing to form the inner space of the box body. The functional board is arranged on the inner side surface of the plastic material part and comprises a continuous fiber reinforced resin prepreg board. In the technical scheme of the embodiment of the utility model, the strength and the flame retardance of the plastic material part are enhanced by the functional plate, a part of the thickness of the box body is formed by the plastic material part, the other part of the thickness of the box body is formed by the functional plate, and compared with a battery box body obtained by fully-continuous fiber reinforced resin prepreg with the same thickness, the forming speed of the thickness part of the box body formed by the plastic material part is faster, so that the production time of the battery box body can be shortened, and the production efficiency of the battery box body is further improved.

Description

Battery box, box cover, battery and power utilization device

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery box body, a box cover, a battery and an electric device.

Background

The battery case is a main structure forming an internal space of the battery. Most of traditional battery boxes are made of metal materials, so that the mechanical property requirements of the battery boxes can be met. However, the metal material has a high density, which is disadvantageous in weight reduction of the battery.

In order to meet the requirements of light weight and mechanical properties of the battery box, in the related art, a continuous fiber reinforced resin-based material is used for preparing the battery box. Because the continuous fiber reinforced resin-based material is of a sheet structure, in the process of producing the battery box body, the continuous fiber reinforced resin-based material of the laminated multilayer sheet is required to be molded to form a corresponding structure, and the production efficiency is low.

Disclosure of Invention

In view of the above, the present utility model provides a battery case, a case cover, a battery, and an electric device, which can improve the production efficiency of the battery case.

In a first aspect, the utility model provides a battery box body, which comprises a box body and a functional board, wherein the box body is provided with an inner side surface facing to an inner space of the box body, the box body comprises a plastic material part, and the plastic material part participates in enclosing to form the inner space of the box body. The functional board is arranged on the inner side surface of the plastic material part and comprises a continuous fiber reinforced resin prepreg board.

In the technical scheme of the embodiment of the utility model, the strength and the flame retardance of the plastic material part are enhanced by the functional plate, a part of the thickness of the box body is formed by the plastic material part, the other part of the thickness of the box body is formed by the functional plate, and compared with a battery box body obtained by fully-continuous fiber reinforced resin prepreg with the same thickness, the forming speed of the thickness part of the box body formed by the plastic material part is faster, so that the production time of the battery box body can be shortened, and the production efficiency of the battery box body is further improved.

In some embodiments, the functional plate is integrally injection molded with the plastic material portion. At this moment, in the injection moulding process of the plastic material part, not only the molding of the plastic material part can be realized, but also the integral connection of the plastic material part and the functional board can be realized, and the production efficiency of the battery box body is higher.

In some embodiments, the functional board includes a plurality of layers of continuous fiber reinforced resin prepreg arranged in a mold lamination along a thickness direction of the plastic material portion. At this time, the functional board is obtained by the mould pressing lamination of multilayer continuous fiber reinforced resin prepreg layers, and each layer structure of the functional board is comparatively even, and functional board structure intensity reliability is high and the uniformity is better.

In some embodiments, the case body includes an upper cover and a bottom plate that enclose an interior space of the battery case. At least one of the upper cover and the bottom plate is constructed as a plastic material portion. At this time, enclose and close at least one in upper cover and the bottom plate that forms case body inner space and regard as plastics material portion, case body quality is lighter, and because the setting of function board, case body intensity is great, and the fire resistance is better.

In some embodiments, the upper cover is constructed of a plastic material and includes an integrally formed end plate and a shroud disposed about the end plate along a circumference of the end plate. The end plate and the coaming enclose to form a containing cavity with one open end, and the bottom plate covers the opening of the containing cavity. At this moment, bounding wall and end plate take injection moulding integrated into one piece, and the shaping is simple, and is difficult for forming defects such as fracture, crack in the juncture of both, and the sealed effect of upper cover is better.

In some embodiments, the functional plate is disposed on an inner side of the end plate. At this moment, set up the medial surface at the end plate with the function board, can play fire-retardant effect to the end plate, reduce the risk that the end plate was burnt through.

In some embodiments, the functional plate covers all of the inner side of the end plate. At this time, when the coverage area of the functional plate is large, the protection range of the end plate is better, and the risk of burning through the end plate at a high temperature is lower.

In some embodiments, the upper cover further comprises a convex edge, the convex edge is arranged at one end of the coaming, which is away from the end plate, the convex edge is arranged along the circumferential direction of the coaming and protrudes towards the direction away from the inner side surface of the coaming, and the convex edge is in sealing connection with the bottom plate. At this time, the upper cover is connected with the bottom plate through the convex edge, and is easy to assemble.

In a second aspect, the present utility model provides a cover for a battery compartment. The case cover comprises an upper cover and a functional plate, wherein the upper cover is constructed as a plastic material part, and the plastic material part is configured to participate in enclosing to form an inner space of the battery case body. The functional board is arranged on the inner side surface of the plastic material facing the inner part of the battery box body, and comprises a continuous fiber reinforced resin prepreg board.

At this time, the cover of the battery case is formed by the upper cover and the functional plate, and the cover can be assembled with the bottom plate of the battery case to form the internal space of the battery case. Because the main body and the upper cover of the case cover are made of plastic parts, the case cover can be obtained through injection molding, and the molding efficiency is high, thereby being beneficial to improving the production efficiency of the battery case body; moreover, the functional plate is arranged in the box cover, the strength of the upper cover of the plastic material part can be improved, the mechanical property of the upper cover is enhanced, meanwhile, the fire resistance of the functional plate can reduce the risk of burning through the upper cover, and the reliability of the battery box body is improved

In some embodiments, the functional plate is integrally injection molded with the plastic material portion. At this moment, in the injection molding process of the plastic material part, not only the molding of the plastic material part can be realized, but also the integral connection of the plastic material part S and the functional board can be realized, and the production efficiency of the battery box body is higher.

In some embodiments, the upper cover includes integrated into one piece's end plate and bounding wall, and the bounding wall encircles along the circumference of end plate and sets up in the end plate, and end plate and bounding wall enclose and close and form one end open and hold the chamber, and the function board sets up in the medial surface of end plate. Normally, when the battery monomer is contained in the battery box, the pressure release part on the battery monomer is arranged towards the end plate, and at the moment, the functional plate is arranged on the inner side surface of the end plate, so that the end plate can be flame-retardant, and the risk of burning through of the end plate is reduced.

In a third aspect, the present utility model provides a battery comprising a battery cell and a battery case, the battery cell being housed in the battery case. The battery box body is the battery box body in the above embodiment or comprises the box cover in the above embodiment.

In some embodiments, the battery cell has a pressure relief portion located at an end surface of the battery cell facing the functional plate. When the pressure or temperature in the battery monomer exceeds the threshold value of the pressure relief part, the pressure relief part is communicated with the inside and the outside of the battery monomer, and high-temperature gas released from the pressure relief part is flushed to the functional plate.

In a fourth aspect, the present utility model provides an electrical device comprising a battery according to the above embodiments for providing electrical energy.

The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present utility model more readily apparent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:

FIG. 1 is a schematic structural diagram of a vehicle provided in one or more embodiments.

Fig. 2 is an exploded view of a battery of one or more embodiments.

Fig. 3 is an exploded view of a battery cell according to one or more embodiments.

Fig. 4 is a schematic view showing the structure of a case cover of a battery case in the battery shown in fig. 2.

Fig. 5 is a cross-sectional view of the case cover shown in fig. 4.

Fig. 6 is an enlarged view at I in fig. 5.

Fig. 7 is a schematic diagram of the internal structure of a functional board of one or more embodiments.

Reference numerals in the specific embodiments are as follows:

1000. a vehicle; 100. a battery; 200. a controller; 300. a motor; 10. a battery case; 10A, a box cover; 11. a case body; m, inner side; s, a plastic material part; 11a, an upper cover; a1, end plates; a2, coaming plates; a3, a convex edge; 11b, a bottom plate; 12. a function board; 12a, a continuous fiber reinforced resin prepreg layer; q, accommodating the cavity; 20. a battery cell; 21. an end cap; 21a, electrode terminals; 22. a housing; 23. a cell assembly; 24. and a pressure relief part.

Detailed Description

Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of the embodiments of the present utility model, the technical terms "first," "second," and the like, if any, are used merely to distinguish between different objects and should not be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiment of the present utility model, if the term "and/or" appears as only one association relationship describing the association object, it means that three relationships may exist, for example, a and/or B may be represented: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the associated object is an "or" relationship, if any.

In describing embodiments of the present utility model, the term "plurality" refers to two or more (including two), and similarly, "plurality" refers to two or more (including two), and "plurality" refers to two or more (including two).

In the description of the embodiments of the present utility model, if any, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are directional or positional relationships indicated based on the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present utility model.

In the description of the embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.

The battery case is a main structure forming an internal space of the battery. The battery box body is loaded with battery monomers to form a battery, and the light weight requirement of the battery is increasingly urgent in consideration of energy conservation. The weight reduction of the battery case is an important way to achieve weight reduction of the battery. Most of traditional battery boxes are made of metal materials, so that the mechanical property requirements of the battery boxes can be met. However, the metal material has a high density, which is disadvantageous in weight reduction of the battery. Meanwhile, the battery cells in the battery box body can generate high temperature when in thermal failure, and the temperature resistance of the battery cells needs to be considered when the battery box body is designed.

In order to reduce the weight of the battery case and to ensure the mechanical properties thereof, etc., in the related art, a continuous fiber reinforced resin-based material (i.e., a continuous fiber reinforced resin prepreg) is used to prepare the battery case. The continuous fiber reinforced resin matrix material is a sheet structure formed by compounding the resin through melting or dissolving and then infiltrating the continuous fibers or fabrics, and is similar to a sheet structure formed by compounding long strip-shaped filiform continuous fibers through taking the resin as a matrix, and the continuous fiber reinforced resin matrix material sheet has excellent mechanical properties of lighter weight, flame retardance, higher strength and rigidity, excellent shock resistance and the like. However, when the continuous fiber reinforced resin-based material is used for preparing the battery box body, the continuous fiber reinforced resin-based material of the laminated multilayer sheet is required to be molded to obtain a corresponding structure, and the production efficiency is low.

In order to improve the production efficiency of the battery case, it is considered to reduce the thickness occupied by the continuous fiber reinforced resin prepreg on the battery case. Specifically, a lightweight plastic may be formed as a part of the battery case while the plastic part is reinforced in combination with the excellent properties of the continuous fiber reinforced resin prepreg, and the high molding efficiency of the plastic part (which may not be generally limited to injection molding) is utilized to improve the production efficiency of the battery case.

Based on the above, the embodiment of the utility model designs a battery box body, which comprises a box body and a functional board, wherein the functional board is a continuous fiber reinforced resin prepreg board, the box body is provided with a plastic material part, and the functional board is arranged on the inner side surface of the plastic material part. The functional board is combined with two materials of the plastic material part, the strength of the plastic material part is enhanced by the functional board, a part of thickness of the box body is formed by the plastic material part, the other part of thickness of the box body is formed by the functional board, and compared with a battery box body obtained by fully continuous fiber reinforced resin prepreg with the same thickness, the forming speed of the thickness part of the box body formed by the plastic material part is faster, the production time of the battery box body can be shortened, the production efficiency of the battery box body is improved, and the battery box body with both production efficiency and mechanical property can be obtained.

The battery according to the embodiment of the utility model can be used as a power source of an electric device to supply electric energy. The power device may be, but is not limited to, a cell phone, tablet, notebook computer, electric toy, electric tool, battery car, electric car, ship, spacecraft, etc.

For convenience of description, the following embodiment will take an electric device according to an embodiment of the present utility model as an example of the vehicle 1000.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to one or more embodiments. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery 100 is provided in the interior of the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the present utility model, battery 100 may not only serve as an operating power source for vehicle 1000, but may also serve as a driving power source for vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000.

Fig. 2 is an exploded schematic view of battery 100 of one or more embodiments. Referring to fig. 2, a battery 100 includes a battery case 10 and a battery cell 20. The battery cell 20 is accommodated in the inner space of the battery case 10. The battery cell 20 is a minimum unit constituting the battery 100, and is a main structure for realizing the supply/discharge of the battery 100. In the battery 100, the number of the battery cells 20 may be plural, and the plural battery cells 20 may be connected in series, parallel, or series-parallel. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for making electrical connection between the plurality of battery cells 20.

Wherein each battery cell 20 may be a secondary battery 100 or a primary battery 100; but not limited to, lithium sulfur battery 100, sodium ion battery 100, or magnesium ion battery 100. The battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, etc.

Referring to fig. 3, fig. 3 is a schematic diagram illustrating an exploded structure of a battery cell 20 according to one or more embodiments. As shown in fig. 3, the battery cell 20 includes an end cap 21, a housing 22, a cell assembly 23, and other functional components.

Typically, the case 22 is an assembly that forms the internal environment of the battery cell 20, which may be used to house the cell assembly 23, electrolyte, and other components, and the end cap 21 is capped at the opening of the case 22 to isolate the internal environment of the battery cell 20 from the external environment. The end cap 21 may be provided with a functional member such as an electrode terminal 21 a. The electrode terminals 21a may be used to electrically connect with the cell assembly 23 for outputting or inputting electric power of the battery cell 20. In some embodiments, the end cap 21 may further be provided with a pressure relief portion 24 for relieving the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold value.

The cell assembly 23 is a component in which electrochemical reactions occur in the battery cells 20. One or more battery cell assemblies 23 may be contained within the housing 22. The cell assembly 23 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The portions of the positive electrode sheet and the negative electrode sheet having active material constitute the end plate a1 portion of the cell assembly 23, and the portions of the positive electrode sheet and the negative electrode sheet having no active material constitute the tabs, respectively. The positive electrode tab and the negative electrode tab may be located at one end of the end plate a1 or located at two ends of the end plate a1. During charge and discharge of the battery 100, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab is connected to the electrode terminal 21a to form a current loop.

The battery case 10 provided in the embodiment of the present utility model will be described in detail.

Fig. 4 is a schematic diagram of the structure of the case cover 10A of the battery case 10 in the battery 100 shown in fig. 2. Fig. 5 is a sectional view of the case cover 10A shown in fig. 4, and fig. 6 is an enlarged view at I in fig. 5.

According to one or more embodiments of the present utility model, referring to fig. 2, 4, 5 and 6, a battery case 10 provided in an embodiment of the present utility model includes a case body 11 and a functional board 12, where the case body 11 has an inner side surface m facing an inner space of the case body 11, and the case body 11 includes a plastic material portion S, and the plastic material portion S is engaged in enclosing the inner space of the case body 11. The functional board 12 is provided on the inner surface m of the plastic material portion S, and the functional board 12 includes a continuous fiber reinforced resin prepreg.

The case body 11 is a structure in which an internal space of the battery case 10 for loading the battery cells 20 and the like is formed in the battery case 10. The case body 11 has an inner side surface m provided to face the inner space, and the entire inner side surface m of the case body 11 encloses the size of the inner space.

The external structure of the case body 11 determines the external structure of the battery 100. The case body 11 generally includes a first portion and a second portion, wherein the first portion and the second portion together enclose an inner space of the battery case 10. The first portion and the second portion may each independently form a part of the internal space of the battery case 10. One of the first portion and the second portion may form the internal space of the entire battery case 10, and the other may be covered on the other to close the internal space. Typically, but not limited to, at least one of the first portion and the second portion is made of plastic material and constitutes a plastic material portion S of the tank body 11. Of course, when one of the first portions is of plastic material, the other may be of metal material. The first part and the second part can be detachably connected or integrally connected.

The case body 11 includes a plastic material portion S, which is a structure made of plastic and which participates in enclosing an inner space of the case body 11. The plastic material may be, but is not limited to, thermoplastic plastics such as polypropylene (PP), nylon (PA), polyethylene terephthalate (PET), polycarbonate (PC), polyphenylene Sulfide (PPs), polyetherimide (PEI), and Polyetheretherketone (PEEK). The plastic material portion S may be the entire box body 11, or may be a partial structure of the box body 11. The plastic material portion S has an inner side surface m that forms the internal space of the battery case 10.

The functional board 12 is a plate-like structure constructed of a continuous fiber reinforced resin prepreg, and generally, the functional board 12 is thin in thickness. The continuous fiber reinforced resin prepreg refers to a sheet structure formed by compounding continuous fibers or fabrics after the resin is melted or dissolved, and is similar to a sheet structure formed by compounding long strip-shaped continuous fibers with the resin as a matrix, and the continuous fiber reinforced resin prepreg has excellent mechanical properties such as lighter weight, flame retardance, higher strength and rigidity, excellent shock resistance and the like.

The resin substrate of the continuous fiber reinforced resin prepreg may be, but is not limited to, the same resin material as the plastic material portion S, and thus the bonding effect of the functional board 12 and the plastic material portion S is better. Wherein the continuous fibers contained in the continuous fiber reinforced resin prepreg may be, but not limited to, one or more of carbon fibers, glass fibers, basalt fibers, aramid fibers, natural fibers, and ultra-high molecular weight polyethylene fibers. Regarding the specific composition and type of the continuous fiber reinforced resin prepreg, conventional choices in the art may be selected.

The functional board 12 is provided on the inner side surface m of the plastic material portion S, and the functional board and the plastic material portion S may be integrally molded by hot press molding after each molding, or may be fixedly connected by means of a fastener. The functional plate 12 is provided on one side of the plastic material portion S in the thickness direction thereof.

In the battery case 10, the strength and flame retardance of the plastic material portion S are reinforced by the functional board 12, a part of the thickness of the case body 11 is formed by the plastic material portion S, the other part of the thickness of the case body 11 is formed by the functional board 12, and compared with the battery case 10 obtained by the fully continuous fiber reinforced resin prepreg with the same thickness, the forming speed of the case thickness part formed by the plastic material portion S is faster, so that the production time of the battery case 10 can be shortened, and the production efficiency of the battery case 10 can be improved.

In addition, when the battery cell 20 in the battery case 10 fails thermally, the functional board 12 plays a role in flame retardance between the high-temperature gas and the plastic portion S, so that the risk of burning through the plastic portion S can be reduced, and the reliability of the battery 100 can be improved.

In some embodiments, the functional plate 12 is injection molded integrally with the plastic material portion S.

The injection molding is a molding method for obtaining a molded product by injecting a molten plastic material into a mold cavity and cooling and solidifying, and has the characteristics of high production speed, high efficiency, high degree of automation and the like.

Specifically, the functional board 12 may be placed in a mold of the plastic material portion S after molding, and then molten plastic is injected into the mold, and the functional board 12 is formed integrally with the plastic during molding. Thus, in the injection molding process of the plastic material portion S, not only the molding of the plastic material portion S but also the integral connection of the plastic material portion S and the functional board 12 can be realized, and the production efficiency of the battery case 10 is higher.

Fig. 7 is a schematic diagram of the internal structure of the functional board 12 of one or more embodiments.

In some embodiments, referring to fig. 7, the functional board 12 includes a plurality of continuous fiber reinforced resin prepreg layers 12a, and the plurality of continuous fiber reinforced resin prepreg layers 12a are arranged in a mold lamination along the thickness direction of the plastic material portion S.

The continuous fiber reinforced resin prepreg layer 12a is a composite body having a certain tackiness obtained by impregnating a resin with a continuous fiber cloth, a fabric or the like, and then drying, and the functional board 12 is formed by molding a plurality of layers of the continuous fiber reinforced resin prepreg layer 12 a. The thickness direction of the plastic material portion S is the lamination direction of the plurality of continuous fiber reinforced resin prepreg layers 12 a. The continuous fiber reinforced resin prepreg layer 12a may be, but is not limited to, a commercially available product.

The type of the continuous fiber-reinforced resin prepreg layer 12a contained in the functional board 12 may be one or more.

At this time, the functional board 12 is obtained by laminating a plurality of continuous fiber reinforced resin prepreg layers 12a in a mold, each layer of the functional board 12 has a relatively uniform structure, and the functional board 12 has high structural strength and reliability and good consistency.

Of course, in other embodiments, the functional board 12 may be a product having a desired thickness obtained by mixing continuous fibers with a resin.

In some embodiments, referring to fig. 3, the case body 11 includes an upper cover 11a and a bottom plate 11b, and the upper cover 11a and the bottom plate 11b enclose an inner space of the battery case 10. At least one of the upper cover 11a and the bottom plate 11b is configured as a plastic material portion S.

The bottom plate 11b is a member of the battery case 10 for carrying structures such as the battery cells 20 and the like inside the battery case 10. The upper cover 11a and the bottom plate 11b are disposed adjacent to each other in the height direction of the case body 11, and when assembled together, they can enclose to obtain the internal space of the battery case 10. In one embodiment, the bottom plate 11b encloses a cavity structure in which the battery cells 20 are received, and the upper cover 11a covers the opening of the cavity structure and closes the cavity structure. In another embodiment, the upper cover 11a encloses a space for accommodating the battery cell 20, the bottom plate 11b covers the space, and the battery cell 20 is supported on the bottom plate 11 b.

The upper cover 11a and the bottom plate 11b may be both made of plastic, or only the upper cover 11a or the bottom plate 11b may be made of plastic. Typically, the upper cover 11a is made of plastic, and the bottom plate 11b is made of metal (e.g., aluminum alloy), so that the bottom plate 11b needs to have high strength to strongly support the battery cells 20 and other structures because the battery cells 20 are weighed on the bottom plate 11 b.

At this time, at least one of the upper cover 11a and the bottom plate 11b, which enclose the inner space of the case body 11, serves as the plastic material portion S, the case body 11 is light in weight, and the case body 11 is strong and flame retardant due to the provision of the functional plate 12.

In some embodiments, referring to fig. 4, 5 and 6, the upper cover 11a is configured as a plastic material portion S, and the upper cover 11a includes an integrally formed end plate a1 and a coaming a2, and the coaming a2 is circumferentially disposed on the end plate a1 along a circumferential direction of the end plate a1. The end plate a1 and the coaming a2 enclose to form a containing cavity Q with one end open, and the bottom plate 11b covers the opening of the containing cavity Q.

The end plate a1 and the upper cover 11a are disposed opposite to the bottom plate 11b, and the shroud a2 is a portion disposed around the circumferential direction of the end plate a1. The opposite direction of the end plate a1 to the bottom plate 11b is the first direction, and the circumferential direction of the end plate a1 is the locus of the outer circumferential contour thereof provided around the first direction. The housing chamber Q formed by the coaming a2 and the end plate a1 constitutes all or part of the internal space of the battery case 10.

The upper cover 11a is a plastic injection molded part, and is generally formed by integrally injection molding the coaming a2 and the end plate a1. Understandably, the shroud a2 is disposed at an angle relative to the end plate a1. At this time, the coaming a2 and the end plate a1 are integrally molded by injection molding, the molding is simple, and defects such as cracks and cracks are not easy to form at the junction of the coaming a2 and the end plate a1, so that the sealing effect of the upper cover 11a is good.

In addition, since the continuous fiber reinforced resin substrate is not easy to bend and break in a short length range, a flat plate structure is often produced by using the continuous fiber reinforced resin prepreg, and if a vertical structure such as a coaming a2 is to be formed at the periphery of the flat plate structure produced by using the continuous fiber reinforced resin prepreg, a thickening arrangement by a hot melt bonding method is required, which often causes problems such as air leakage at the joint. In the embodiment of the utility model, the end plate a1 and the coaming a2 are integrally formed by injection molding, and the junction of the end plate a1 and the coaming a2 is integrally connected, so that the probability of air leakage and breakage is low, and the tightness of the internal space of the battery box 10 is facilitated.

In some embodiments, referring to fig. 6, the functional plate 12 is disposed on the inner side surface m of the end plate a1.

The inner side surface m of the end plate a1 is an inner wall surface facing the inner space of the battery case 10. The functional plate 12 may be arranged at part or all of the end inner side m.

Normally, when the battery cell 20 is accommodated in the battery case 10, the pressure relief portion 24 of the battery cell 20 is provided facing the end plate a1, and at this time, the functional plate 12 is provided on the inner side surface m of the end plate a1, so that the end plate a1 can be flame-retardant, and the risk of burning through the end plate a1 can be reduced.

Of course, in other embodiments, if the pressure release portion 24 of the battery cell 20 is disposed facing the enclosure plate a2, the function board 12 may be disposed on the inner side surface m of the enclosure plate a 2. Alternatively, the function plate 12 is provided on the inner side surface m of each of the end plate a1 and the surrounding plate a 2.

In some embodiments, the functional plate 12 covers all of the inner side surface m of the end plate a1. That is, the function plate 12 covers the entire inner wall surface of the end plate a1. At this time, when the coverage area of the functional plate 12 is large, the protection range of the end plate a1 is better, and the risk of burning through the end plate a1 at high temperature is lower.

In some embodiments, referring to fig. 4 and 5, and in combination with fig. 3, the upper cover 11a further includes a flange a3, the flange a3 is disposed at an end of the coaming a2 facing away from the end plate a1, the flange a3 is disposed circumferentially around the coaming a2 and protrudes in a direction facing away from the inner side surface m of the coaming a2, and the flange a3 is in sealing connection with the bottom plate 11 b.

The circumferential direction of the shroud a2, i.e., the direction in which the shroud a2 is disposed around the end plate a1. The inner side surface m of the coaming a2 serves as the inner surface of the inner wall surface of the battery case 10.

The convex edge a3 is connected to the coaming a2 in an intersecting manner (generally vertically), and projects toward the outside facing away from the inner space of the battery case 10. One end surface of the convex edge a3 in the thickness direction thereof is attached to the bottom plate 11b and fixedly connected thereto. The convex edge a3 and the bottom plate 11b may be fastened, welded, clamped, etc. Typically, the flange a3 is detachably connected to the base plate 11 b. Further, a sealing member (e.g., O-ring, square ring) may be provided between the flange a3 and the bottom plate 11b

At this time, the upper cover 11a is connected to the bottom plate 11b by the flange a3, and is easy to assemble.

In an embodiment of the present utility model, the battery case 10 includes an upper cover 11a, a bottom plate 11b and a functional plate 12, the upper cover 11a is a plastic material portion S and includes an end cover 21, a surrounding plate a2 and a flange a3, the surrounding plate a2 is disposed between the bottom plate 11b and the end plate a1, the surrounding plate a2 is disposed around the end plate a1 along the circumferential direction of the end plate a1 and extends and protrudes toward the bottom plate 11b, the flange a3 is disposed along the circumferential direction of the surrounding plate a2 and protrudes toward the outside of the battery case 10, the flange a3 is connected with the bottom plate 11b, and the surrounding plate a2, the end plate a1 and the bottom plate 11b enclose to form an inner space of the battery case 10. The functional plate 12 is provided on the inner side surface m of the upper cover 11 a.

In the battery case 10, the upper cover 11a and the functional board 12 form a case cover 10A, and the case cover 10A may be formed by: the functional board 12 is formed by molding a plurality of layers of continuous fiber reinforced resin prepreg layers 12a, the functional board 12 is placed in an injection mold, molten plastic is injected into the injection mold, and after cooling through a cooling flow path of the mold, the functional board 12 and the upper cover 11a, namely the case cover 10A, which are integrally molded are obtained. The battery case 10 is obtained by connecting the case cover 10A to the bottom plate 11 b.

In addition, referring to fig. 4, 5 and 6, the embodiment of the present utility model further provides a case cover 10A for the battery case 10. The case cover 10A includes an upper cover 11a and a functional board 12, the upper cover 11a is configured as a plastic material portion S, the plastic material portion S participates in enclosing to form an internal space of the battery case 10, the functional board 12 is disposed on an inner side surface m of the plastic material portion S disposed facing the inside of the battery case 10, and the functional board 12 is a continuous fiber reinforced resin prepreg board.

For the description of the upper cover 11a, the functional board 12, the plastic portion S, the inner side surface m, etc., please refer to the above description, and the description is omitted here.

At this time, the cover 10A of the battery case 10 is formed by the upper cover 11a and the functional plate 12, and the cover 10A may be assembled with the bottom plate 11b of the battery case 10 to form the internal space of the battery case 10. Because the upper cover 11a of the case cover 10A is the plastic material part S, which can be obtained by injection molding, the molding efficiency is high, which is beneficial to improving the production efficiency of the battery case 10; the functional plate 12 is provided inside the case cover 10A, so that the strength of the upper cover 11a as the plastic material portion S can be improved, the mechanical properties can be enhanced, and the flame retardancy of the functional plate 12 can reduce the risk of burning through the upper cover 11a, thereby improving the reliability of the battery case 10.

In some embodiments, the functional plate 12 is injection molded integrally with the plastic material portion S. That is, the functional plate 12 is injection molded integrally with the upper cover 11 a. Specifically, the functional board 12 may be placed in a mold of the upper cover 11a after molding, and then molten plastic is injected into the mold, and the functional board 12 is formed integrally with the plastic during molding. In this way, in the injection molding process of the upper cover 11a, not only the upper cover 11a can be molded, but also the upper cover 11a and the functional board 12 can be integrally connected, so that the production efficiency of the battery box 10 is higher.

The description of the continuous fiber-reinforced resin prepreg layer 12a is referred to above and is not repeated here.

In some embodiments, referring to fig. 4 and 5, the upper cover 11a includes an integrally formed end plate a1 and a surrounding plate a2, the surrounding plate a2 is circumferentially disposed on the end plate a1, the end plate a1 and the surrounding plate a2 enclose a receiving cavity Q with an open end, and the functional board 12 is disposed on an inner side surface m of the end plate a1.

The upper cover 11a is a plastic injection molding part, and the coaming a2 and the end plate a1 may be injection molded integrally. Understandably, the coaming a2 is arranged at an angle relative to the end plate a1, at this time, the coaming a2 and the end plate a1 are integrally formed by injection molding, the molding is simple, and defects such as cracks and fissures are not easy to form at the junction of the coaming a2 and the end plate a1, so that the sealing effect of the upper cover 11a is good.

Of course, the upper cover 11a and the functional board 12 in the case cover 10A in the embodiment of the present utility model further include all the features of the upper cover 11a and the functional board 12 in the battery case 10, which are not described herein.

In addition, referring to fig. 3, the embodiment of the utility model further provides a battery 100, which includes a battery unit 20 and a battery case 10, wherein the battery unit 20 is accommodated in the battery case 10. The battery case 10 is the battery case 10 in the above embodiment or includes the case cover 10A in the above embodiment. Which includes all of the benefits of the embodiments described above.

In some embodiments, the battery cell 20 has a pressure relief portion 24, and the pressure relief portion 24 is located at an end surface of the battery cell 20 facing the functional board 12.

The pressure relief portion 24 is a member that relieves the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold value, and may be a pressure relief valve, a thickness reduction structure provided in the end cap 21 of the battery cell 20, or the like.

The pressure relief portion 24 is provided at an end surface of the battery cell 20 facing the functional plate 12, which is typically a surface of the end cap 21 of the battery cell 20. At this time, when the internal pressure or temperature of the battery cell 20 exceeds the threshold value of the pressure relief portion 24, the pressure relief portion 24 communicates the inside and outside of the battery cell 20, and the high-temperature gas released from the pressure relief portion 24 is flushed toward the functional board 12, so that the risk of burning through the plastic material portion S by the high-temperature gas can be reduced due to the better flame retardance of the functional board 12, and the reliability of the battery 100 can be improved.

In particular, in the embodiment, the pressure relief portion 24 is provided on the end cap 21 of the battery cell 20, and the end cap 21 is disposed toward the end plate a1 of the upper cover 11a of the battery case 10.

In addition, the embodiment of the utility model also provides an electric device, which comprises the battery 100 of the embodiment, wherein the battery 100 is used for providing electric energy, and the electric device comprises all the beneficial effects.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. A battery box (10), characterized by comprising:

a case body (11) having an inner side surface (m) facing the inner space of the case body (11), wherein the case body (11) includes a plastic material portion (S) that is engaged in enclosing the inner space of the case body (11); a kind of electronic device with high-pressure air-conditioning system

And a functional board (12) provided on the inner side surface (m) of the plastic material section (S), wherein the functional board (12) comprises a continuous fiber reinforced resin prepreg.

2. The battery case (10) according to claim 1, wherein the functional plate (12) is integrally injection-molded with the plastic material portion (S).

3. The battery case (10) according to claim 2, wherein the functional board (12) includes a plurality of layers of continuous fiber reinforced resin prepreg (12 a), and the plurality of layers of continuous fiber reinforced resin prepreg (12 a) are laminated by molding in a thickness direction of the plastic material portion (S).

4. The battery case (10) according to claim 1, wherein the case body (11) includes an upper cover (11 a) and a bottom plate (11 b), the upper cover (11 a) and the bottom plate (11 b) enclosing an inner space of the battery case (10);

at least one of the upper cover (11 a) and the bottom plate (11 b) is configured as the plastic material portion (S).

5. The battery case (10) according to claim 4, wherein the upper cover (11 a) is configured as the plastic material portion (S), the upper cover (11 a) includes an integrally formed end plate (a 1) and a coaming (a 2), the coaming (a 2) being circumferentially provided to the end plate (a 1) along a circumferential direction of the end plate (a 1);

the end plate (a 1) and the coaming (a 2) enclose to form a containing cavity (Q) with one end open, and the bottom plate (11 b) covers the opening of the containing cavity (Q).

6. The battery case (10) according to claim 5, wherein the functional plate (12) is provided to the inner side surface (m) of the end plate (a 1).

7. The battery case (10) according to claim 6, wherein the functional plate (12) covers all of the inner side (m) of the end plate (a 1).

8. The battery box (10) according to claim 5, wherein the upper cover (11 a) further comprises a flange (a 3), the flange (a 3) being disposed at an end of the shroud (a 2) facing away from the end plate (a 1);

the flange (a 3) is circumferentially arranged around the coaming (a 2) and protrudes towards the direction away from the inner side surface (m) of the coaming (a 2), and the flange (a 3) is in sealing connection with the bottom plate (11 b).

9. A cover (10A) for a battery case (10), comprising:

an upper cover (11 a) configured as a plastic material portion (S) configured to participate in enclosing an internal space forming the battery case (10); a kind of electronic device with high-pressure air-conditioning system

And a functional board (12) provided on an inner side surface (m) of the plastic material section (S) that faces the inside of the battery case (10), wherein the functional board (12) comprises a continuous fiber reinforced resin prepreg.

10. The case cover (10A) according to claim 9, characterized in that said functional plate (12) is injection molded integrally with said plastic material portion (S).

11. The case cover (10A) according to claim 9, wherein the functional board (12) includes a plurality of layers of continuous fiber-reinforced resin prepreg (12 a), and the plurality of layers of continuous fiber-reinforced resin prepreg (12 a) are laminated by molding in a thickness direction of the plastic material portion (S).

12. The case cover (10A) according to claim 9, wherein the upper cover (11 a) includes an integrally formed end plate (a 1) and a shroud plate (a 2), the shroud plate (a 2) being circumferentially provided to the end plate (a 1) along a circumferential direction of the end plate (a 1); the end plate (a 1) and the coaming (a 2) are enclosed to form a containing cavity (Q) with one end open;

the functional plate (12) is provided on the inner surface (m) of the end plate (a 1).

13. A battery (100), characterized by comprising:

a battery cell (20); a kind of electronic device with high-pressure air-conditioning system

A battery box body (10), wherein the battery unit (20) is accommodated in the battery box body (10);

wherein the battery box (10) is a battery box (10) according to any one of claims 1-8, or the battery box (10) comprises a cover (10A) according to claims 9-12.

14. The battery (100) according to claim 13, wherein the battery cell (20) has a pressure relief portion (24), the pressure relief portion (24) being located at an end surface of the battery cell (20) facing the functional board (12).

15. An electrical device comprising a battery (100) according to claim 13 or 14, the battery (100) being adapted to provide electrical energy.