CN120432793A - Battery devices and power-consuming devices - Google Patents

Abstract

The present application is applicable to the field of battery technology, and proposes a battery device and an electrical device, the battery device comprising: a box body comprising a first box body, the material of the first box body comprising a non-metallic composite material, the first box body comprising a frame structure and a bottom plate, the frame structure and the bottom plate forming a receiving space, the first box body further comprising a first beam body received in the receiving space, the material of the first beam body comprising metal; a battery cell assembly is received in the receiving space; at least a portion of the heat exchange assembly is connected to a side of the bottom plate facing the receiving space; at least a portion of the first beam body is welded to a side of the heat exchange assembly facing away from the bottom plate; in the battery device provided in the embodiment of the present application, the material of the first beam body is different from that of the bottom plate and the frame structure, and the first beam body is connected to the bottom plate through the heat exchange assembly to improve the connection stability of the first beam body, and thereby improve the strength of the first beam body, so that the first beam body can better suppress the expansion deformation of the battery cell.

Description

Battery device and electricity utilization device

Technical Field

The present application relates to the field of battery technologies, and in particular, to a battery device and an electric device.

Background

Energy conservation and emission reduction are key to sustainable development of the automobile industry, and electric vehicles become an important component of sustainable development of the automobile industry due to the energy conservation and environmental protection advantages of the electric vehicles. For electric vehicles, battery technology is an important factor in the development of the electric vehicles.

The expansion beam is arranged in the current battery device, so that expansion deformation of the battery monomer in the charge-discharge circulation process is restrained through the expansion beam, the connection stability of the expansion beam and the box body is poor under the condition that the materials of the box body and the expansion beam are different, the restraining effect of the expansion beam on the expansion deformation of the battery monomer is limited, and the requirement is difficult to meet.

Disclosure of Invention

In view of the above, the present application provides a battery device and an electric device, which can alleviate the problem that the current expansion beam has insufficient capability of inhibiting the expansion deformation of the battery cell.

In a first aspect, an embodiment of the present application provides a battery device, including:

The box body comprises a first box body, wherein the first box body comprises a nonmetallic composite material, the first box body comprises a frame structure and a bottom plate connected to the frame structure, an accommodating space is defined by the frame structure and the bottom plate, the first box body further comprises a first beam body accommodated in the accommodating space, the first beam body comprises metal, a battery unit component accommodated in the accommodating space and propped against the first beam body, a heat exchange component at least partially connected to one side of the bottom plate facing the accommodating space, and at least partially welded to one side of the heat exchange component facing away from the bottom plate so as to be indirectly connected to the bottom plate through the heat exchange component.

In the technical scheme of the embodiment, the first beam body, the bottom plate and the frame structure are made of different materials, so that the first box body can be made of lighter materials, the whole weight of the box body is reduced, the first beam body is connected to the bottom plate through the heat exchange assembly, the connection stability of the first beam body is improved, the strength of the first beam body can be improved, and the expansion deformation of a battery monomer can be better restrained by the first beam body.

In some embodiments, the heat exchange assembly comprises a tube having a flow passage therein for a heat exchange medium, the tube being connected to the base plate, at least a portion of the first beam being connected to a side of the tube facing away from the base plate.

The technical scheme of the embodiment provides specific structures of some heat exchange assemblies, which enable the heat exchange assemblies to comprise a pipe body and enable a first beam body to be at least partially connected with the pipe body so as to improve the connection stability of the first beam body through the connection between the pipe body and the first beam body.

In some embodiments, the first beam is welded to the tube.

In the technical scheme of this embodiment, make first roof beam body welded in the body, the material of first roof beam body promptly is close with the material of body to through welded mode further improve the connection stability of first roof beam body, and can improve the performance that first roof beam body restrain battery monomer inflation.

In some embodiments, the number of the pipe bodies is at least two, the at least two pipe bodies are arranged at intervals along the first direction, the length direction of the first beam body is parallel to the first direction, one part of the first beam body is connected with the pipe bodies, and the other part of the first beam body is connected with the bottom plate.

The technical scheme of this embodiment provides the arrangement mode of some body, and the body interval is arranged, makes the partly connection of first roof beam body in the body to improve the connection stability of first roof beam body, make the other part of first roof beam body connect in the bottom plate, with supplementary connection stability who improves first roof beam body, thereby can be better improve the performance that first roof beam body restrain the battery monomer inflation.

In some embodiments, the first beam is bolted to the base plate and/or the first beam is bonded to the base plate.

The technical scheme of the embodiment provides a mode that a plurality of first beam bodies are connected to the bottom plate, and the first beam bodies are difficult to be connected to the bottom plate in a welding mode because the materials of the first beam bodies and the first box body are different, so that the first beam bodies are connected to the bottom plate in a screwing or bonding mode, the connection stability of the first beam bodies is further improved, meanwhile, the strength of the first beam bodies is also further improved, and the capacity of the first beam bodies for inhibiting the expansion deformation of battery monomers is further improved.

In some embodiments, the side of the bottom plate facing the accommodating space is provided with an accommodating groove, and at least part of the tube body is accommodated in the accommodating groove.

In the technical scheme of this embodiment, set up the holding tank on the bottom plate to hold the body through the holding tank, reduced the body and raised the height of bottom plate, and can make accommodation space's bottom surface more level and smooth, thereby can be convenient for the free installation of battery and arrange, also be convenient for first roof beam body connect in body and bottom plate.

In some embodiments, the surface of the tube that is attached to the first beam is flush with the surface of the base plate that is attached to the first beam.

The technical scheme of this embodiment can make accommodation's bottom surface more level and smooth to the single installation of battery and arranging of being convenient for also make simultaneously that first roof beam body can be more stable link to each other with body and bottom plate.

In some embodiments, the first beams are two and arranged at intervals along the second direction, and a first space is formed between the two first beams in the second direction, and the battery cell assembly is accommodated in the first space.

The technical scheme of this embodiment provides the arrangement mode of some first roof beam bodies, sets up battery monomer subassembly between two first roof beam bodies to restrain the free expansion deformation of battery from the free both sides of battery through two first roof beam bodies, thereby can be better restrain the free expansion deformation of battery.

In some embodiments, a second space is formed between any one of the first beams and the frame structure in the second direction, and the heat exchange assembly further comprises a current collector accommodated in the second space, wherein the current collector is communicated with the flow channel in the tube body, and the current collector is arranged at intervals from the first beams.

In the technical scheme of the embodiment, the current collector and the first beam body are arranged at intervals, so that damage to the current collector, which is possibly caused by deformation of the first beam body, can be reduced.

In some embodiments, a portion of the tube extends to a side of the first beam facing away from the first space.

In the technical scheme of the embodiment, a part of the pipe body is extended into the second space, so that the pipe body can also exchange heat with devices in the second space and control the temperature in the second space, and meanwhile, the arrangement can also enable the first beam body to be staggered with the end part of the pipe body, so that the part of the force born on the first beam body can be better transferred to the pipe body, the pipe body can better share the force born on the first beam body, and the strength of the first beam body can be better improved.

In some embodiments, the first box further comprises a stiffener located on a side of the first beam facing away from the first space, one end of the stiffener being connected to the base plate and/or the frame structure, and the other end of the stiffener being connected to the side of the first beam facing away from the first space.

In the technical scheme of this embodiment, set up the reinforcement to further improve the intensity of first roof beam body through the reinforcement, thereby can improve the ability that the first roof beam body restraines battery monomer inflation deformation.

In some embodiments, the first beam body is spaced apart from the frame structure along the length direction of the first beam body, or two ends of the first beam body along the length direction are respectively screwed or adhered to the adjacent frame structure.

The technical scheme of the embodiment provides a relation between a plurality of first beam bodies and a frame structure, the first beam bodies and the frame structure are arranged at intervals so as to facilitate the installation of the first beam bodies, and the first beam bodies are connected to the frame structure through screw connection or bonding so that the frame structure can share a part of force on the first beam bodies, thereby better improving the strength of the first beam bodies and improving the capacity of inhibiting the expansion deformation of battery monomers.

In some embodiments, the base plate is integrally formed with the bezel structure.

In the technical scheme of this embodiment, make bottom plate and frame structure integrated into one piece make to make first box can have higher structural strength and rigidity, can also save the connecting piece and can lighten weight simultaneously.

In some embodiments, the material of the first box comprises a non-metallic composite material and the material of the first beam comprises a metal.

In the technical scheme of the embodiment, the material of the first box body comprises a nonmetallic composite material, so that the first box body can provide support for the battery monomer and can provide protection for the battery monomer, meanwhile, the weight of the first box body can be lighter, the negative influence of the first box body on the whole weight of the battery device is reduced, and the material of the first beam body comprises metal, so that the first beam body can have higher strength, and further the expansion deformation of the battery monomer can be better restrained.

In some embodiments, the base plate, the frame structure, and the like are made of a material including resin and fiber.

The technical scheme of this embodiment provides the concrete material of some bottom plates, frame structure to make first box can have certain intensity, can also have advantages such as good insulating properties, good corrosion resistance, light in weight.

In some embodiments, the first case further includes a second beam connected to a side of the bezel structure facing away from the accommodation space.

In the technical scheme of this embodiment, set up the second roof beam body to improve the intensity of first box lateral part through the second roof beam body, also be convenient for hang battery device on vehicle chassis or other positions through the second roof beam body.

In some embodiments, the material of the second beam comprises metal.

In the technical scheme of the embodiment, the second beam body is made of metal, so that the second beam body can have higher strength to better protect the bottom of the battery device, and meanwhile, the risk that external sundries pierce through the first box body can be reduced, and therefore the battery monomer is better protected.

In a second aspect, embodiments of the present application further provide an electrical device, including a battery device provided by some embodiments of the first aspect.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application 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 application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the present application;

fig. 2 is an exploded view of a battery device according to some embodiments of the present application;

fig. 3 is a schematic diagram illustrating an exploded structure of a battery cell according to some embodiments of the present application;

Fig. 4 is a schematic perspective view of a first case according to some embodiments of the present application;

FIG. 5 is a schematic top view of a first case according to some embodiments of the present application;

FIG. 6 is a schematic cross-sectional view taken along line A-A of FIG. 5;

FIG. 7 is an enlarged partial schematic view of FIG. 6 at C;

FIG. 8 is an enlarged partial schematic view at B in FIG. 5;

FIG. 9 is an enlarged partial schematic view at D in FIG. 6;

fig. 10 is a schematic partial cross-sectional view of a first case according to some embodiments of the present application.

The meaning of the labels in the figures is:

1000. A vehicle;

100. a battery device;

10. The box body, 11, a first box body, 111, an accommodating space, 1111, a first space, 1112, a second space, 112, a frame structure, 113, a bottom plate, 1131, an accommodating groove, 114, a first beam body, 115, a reinforcement, 116, a second beam body, 12 and a second box body;

20. cell assembly, 21, cell, 211, shell, 212, end cover, 213, electrode assembly, 214, electrode terminal;

30. 31, tube body, 311, runner, 32, current collector;

200. a motor;

300. And a controller.

Detailed Description

Embodiments of the technical scheme of the present application 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 application, and thus are merely examples, and are not intended to limit the scope of the present application.

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 application belongs, the terms used herein are for the purpose of describing particular embodiments only and are not intended to be limiting of the application, and the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the above description of the drawings are intended to cover non-exclusive inclusions.

In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to 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 application, 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 application. 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 application, the term "and/or" is merely an association relationship describing the association object, and indicates that three relationships may exist, for example, a and/or B, and may indicate that a exists alone, while a and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element 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 application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "fixed" and the like are to be construed broadly and include, for example, fixed connection, detachable connection, or integral therewith, mechanical connection, electrical connection, direct connection, indirect connection via an intermediary, communication between two elements, or interaction between two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

In the current battery device, the case is generally metal-collected and has a heavy weight, which tends to result in a heavy overall weight of the battery device. In order to reduce the overall weight of the case, the case may be made of a nonmetallic material.

In the battery device, an expansion beam is generally provided to hold the battery cell by the expansion beam and suppress expansion deformation during charge and discharge cycles of the battery cell. In order to ensure the effect of the expansion beam in restraining the expansion deformation of the battery cell, the expansion beam is usually a metal structural member, but in the case that the case is made of a non-metal material, the expansion beam cannot be welded to the case, and if the expansion beam is connected to the case by means of bonding, riveting or the like, the connection stability between the expansion beam and the case is poor, and the capacity of the expansion beam in restraining the expansion deformation of the battery cell is easily reduced.

Based on the above consideration, in order to alleviate the problem that the expansion beam has insufficient capability of inhibiting the expansion deformation of the battery cell under the condition that the case body is different from the expansion Liang Caizhi, the embodiment of the application provides a battery device, wherein the first beam body and the first case body are made of different materials, so that the heat exchange structure is connected to the bottom plate, and the first beam body is connected to the side of the heat exchange structure, which is far away from the bottom plate.

In the battery device, the first beam body and the first box body are made of different materials, the material selection range of the first box body is enlarged, the material of the first box body can be made of a nonmetal material with certain strength and lighter weight, so that the weight of the box body and the whole weight of the battery device are reduced, the first beam body is indirectly connected to the bottom plate through the heat exchange assembly, the heat exchange assembly can share the bearing force of the first beam body, the strength of the first beam body can be improved, meanwhile, the connection area between the heat exchange assembly and the bottom plate is larger, and the connection stability of the heat exchange assembly and the bottom plate is higher, so that the connection stability of the first beam body can be improved.

The battery device disclosed by the embodiment of the application can be used for an electric device using the battery device as a power supply or various energy storage systems using the battery device as an energy storage element. 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. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

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

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present application. 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 interior of the vehicle 1000 is provided with a battery, which may be provided at the bottom or the head or the tail of the vehicle 1000. The battery may be used for power supply of the vehicle 1000, for example, the battery may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 300 and a motor 200, the controller 300 being configured to control a battery to power the motor 200, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

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

Referring to fig. 2, fig. 2 is a schematic diagram illustrating an exploded structure of a battery device 100 according to some embodiments of the present application. The battery device 100 according to the embodiment of the present application may include one or more battery cell assemblies 20 for providing voltage and capacity. The battery cell assembly 20 may include a plurality of battery cells 21, and the plurality of battery cells 21 are connected in series, parallel, or series-parallel by a bus bar.

In some embodiments, the battery cell assembly 20 is generally formed by an arrangement of a plurality of battery cells 21.

As an example, the battery cell assembly 20 may be a battery module that is formed by arranging and fixing a plurality of battery cells 21 into one independent module. As an example, the battery module may be formed by binding a plurality of battery cells 21 by a tie.

In some embodiments, the battery device 100 may be a battery pack including a case 10 and one or more battery cell assemblies 20, the battery cell assemblies 20 being housed in the case 10.

As an example, the battery cell assembly 20 may be a battery module, and the battery cell assembly 20 may be accommodated in the case 10 in such a manner that the battery module is fixed in the case 10.

As an example, the battery cell assembly 20 may be accommodated in the case 10 by directly fixing the plurality of battery cells 21 to the case 10.

As an example, the case 10 may include a first case 11 and a second case 12. The first casing 11 and the second casing 12 are fastened such that a closed space is formed inside the casing 10 to receive the battery cell assembly 20. The closing means covering or closing, and can be sealing or unsealing. The first housing 11 may be a top cover or bottom plate 113.

As an example, the case 10 may include a top cover, a frame, and a bottom plate 113. The top cover and the bottom plate 113 are respectively coupled to the frames such that an enclosed space is formed inside the case 10 to receive the battery cell assembly 20.

In some embodiments, the tank 10 may be part of the chassis structure of the vehicle 1000. For example, a portion of the tank 10 may become at least a portion of the floor of the vehicle 1000, or a portion of the tank 10 may become at least a portion of the cross member and the side member of the vehicle 1000.

Referring to fig. 3, fig. 3 is a schematic diagram illustrating an exploded structure of a battery cell 21 according to some embodiments of the present application. The battery cell 21 refers to the smallest unit constituting the battery. As shown, the battery cell 21 includes an end cap 212, a case 211, an electrode assembly 213, and other functional components.

The end cap 212 refers to a member that is covered at the opening of the case 211 to isolate the internal environment of the battery cell 21 from the external environment. Without limitation, the shape of the end cap 212 may be adapted to the shape of the housing 211 to fit the housing 211. Optionally, the end cap 212 may be made of a material (such as an aluminum alloy) with a certain hardness and strength, so that the end cap 212 is not easy to deform when being extruded and collided, so that the battery cell 21 can have a higher structural strength, and the safety performance can be improved. The end cap 212 may be provided with functional components such as electrode terminals 214. The electrode terminals 214 may be used to be electrically connected with the electrode assembly 213 for outputting or inputting electric power of the battery cells 21. In some embodiments, the end cap 212 may also be provided with a pressure relief mechanism for relieving the internal pressure of the battery cell 21 when the internal pressure or temperature reaches a threshold. The material of the end cap 212 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application is not limited thereto. In some embodiments, insulation may also be provided on the inside of the end cap 212, which may be used to isolate electrical connection components within the housing 211 from the end cap 212 to reduce the risk of short circuits. By way of example, the insulation may be plastic, rubber, or the like.

The case 211 is an assembly for mating with the end cap 212 to form an internal environment of the battery cell 21, wherein the formed internal environment may be used to house the electrode assembly 213, electrolyte, and other components. The case 211 and the end cap 212 may be separate members, and an opening may be provided in the case 211, and the interior of the battery cell 21 may be formed by closing the opening with the end cap 212 at the opening. The end cap 212 and the housing 211 may be integrated, and specifically, the end cap 212 and the housing 211 may form a common connection surface before other components are put into the housing, and when the interior of the housing 211 needs to be sealed, the end cap 212 is covered on the housing 211. The housing 211 may be of various shapes and various sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the case 211 may be determined according to the specific shape and size of the electrode assembly 213. The material of the housing 211 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application.

The electrode assembly 213 is a component in which an electrochemical reaction occurs in the battery cell 21. One or more electrode assemblies 213 may be contained within the housing 211. The electrode assembly 213 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 and negative electrode sheets having active material constitute the main body portion of the electrode assembly 213, and the portions of the positive and negative electrode sheets 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 main body portion together or located at two ends of the main body portion respectively. During charge and discharge of the battery, the positive and negative electrode active materials react with the electrolyte, and the tab is connected to the electrode terminal 214 to form a current loop.

In a first aspect, referring to fig. 4 to 7, an embodiment of the present application provides a battery device 100 including a case 10, a battery cell assembly 20, and a heat exchange assembly 30. The case 10 includes a first case 11, the first case 11 includes a frame structure 112, a bottom plate 113 connected to the frame structure 112, the frame structure 112 and the bottom plate 113 enclose an accommodating space 111, the first case 11 further includes a first beam 114 accommodated in the accommodating space 111, the first beam 114 and the frame structure 112 are made of different materials, the first beam 114 and the bottom plate 113 are made of different materials, the battery unit assembly 20 is accommodated in the accommodating space 111 and abuts against the first beam 114, the heat exchange assembly 30 is at least partially connected to a side of the bottom plate 113 facing the accommodating space 111, and at least a portion of the first beam 114 is connected to a side of the heat exchange assembly 30 facing away from the bottom plate 113 so as to be indirectly connected to the bottom plate 113 through the heat exchange assembly 30.

In the figure, the direction of the X axis is the longitudinal direction of the battery device 100, the direction of the Y axis is the width direction of the battery device 100, and the direction of the Z axis is the height direction of the battery device 100.

The case 10 is a structure for providing the battery pack 20 and the like with the accommodation space 111 in the battery device 100.

The first case 11 refers to a structure of the case 10 for carrying the battery unit 20 or other structures, and in the case that the case 10 includes the first case 11 and the second case 12, the first case 11 is used for accommodating the battery unit 20 or other structures, the second case 12 is used for covering and closing the first case 11, the first case 11 may have a prismatic shape, a cylindrical shape or other shapes according to the shape of the case 10, and the material of the first case 11 may include metal, plastic or other materials.

The frame structure 112 refers to a structure in the first case 11 for providing side protection for the battery unit assembly 20, the frame structure 112 may include a plurality of side beams connected end to end in sequence, the frame structure 112 may be a square frame structure, or may be a pentagonal, hexagonal or other frame structure, the beam body in the frame structure 112 may be a box beam, or may be an i-beam or other beam structure, and the frame structure 112 may be made of plastic or other materials.

The bottom plate 113 refers to a structure for carrying the battery unit assembly 20 or other structures in the first case 11, the bottom plate 113 may be a circular plate structure, a square plate structure or a plate structure with other shapes, the bottom plate 113 is connected to the frame structure 112, the bottom plate 113 may be connected to the frame structure 112 by welding, bonding, screwing or other manners, the bottom plate 113 may be integrally formed with the frame structure 112, the bottom plate 113 may be made of metal, plastic or other materials, and the bottom plate 113 may be made of the same material as or different from the frame structure 112.

The bottom plate 113 and the frame structure 112 can enclose an accommodating space 111, at this time, the accommodating space 111 is a space structure in the first box 11, and the battery unit assembly 20 or other structures are accommodated in the accommodating space 111, where the accommodating space 111 may be a prismatic space structure, a cylindrical space structure or a space structure with other shapes, and the shape of the accommodating space 111 may be set according to the shape of the frame structure 112 to adapt to the first box 11, or may be different from the shape of the frame structure 112.

The first beam 114 refers to a structure in the first housing 11 for fixing and limiting the displacement of the battery cell assembly 20, the first beam 114 may be a box beam with a cavity therein, an i-beam or other beam structures, the number of the first beams 114 may be one, two or more, the shape of the first beam 114 may be prismatic, cylindrical or other, and the material of the first beam 114 may include metal, plastic or other materials.

The battery unit assembly 20 is a structure formed by arranging at least two battery units 21, each battery unit 21 in the battery unit assembly 20 can be connected in series, parallel or series-parallel, each battery unit 21 in the battery unit assembly 20 can be arranged along one direction or can be arranged along two different directions in an array manner, each battery unit 21 in the battery unit assembly 20 can be fixedly restrained through a binding belt, a plate body or other structures, and each battery unit 21 in the battery unit assembly 20 can also be directly arranged in the accommodating space 111 of the first box body 11.

The battery cells 21 refer to the smallest unit constituting the battery device 100, the number of the battery cells 21 may be one or two or more, in the case that the number of the battery cells 21 is at least two, each battery cell 21 may be connected in series, parallel or series, each battery cell 21 may be arranged along one direction or may be arranged in an array along two different directions, each battery cell 21 may be fixedly constrained by a binding band, a plate body or other structures, and each battery cell 21 may also be directly disposed in the accommodating space 111 of the first case 11.

The battery unit assembly 20 is abutted against the first beam 114, and at this time, the first beam 114 can fix the battery unit assembly 20 and limit the displacement of the battery unit assembly 20, and meanwhile, the first beam 114 can also inhibit the expansion deformation of the adjacent battery unit 21 because the battery unit 21 can expand and deform in the charge-discharge cycle process.

In an example, in the case that the number of the battery cells 21 is plural and the battery cell assembly 20 is formed, in the case that the number of the first beams 114 is one, one end of the battery cell assembly 20 is abutted against the first beams 114, and the other end of the battery cell assembly 20 is abutted against the frame structure 112, in the case that the number of the first beams 114 is two, the battery cell assembly 20 is located between the two first beams 114, and at this time, both ends of the battery cell assembly 20 are abutted against the two first beams 114, respectively.

The material of the first beam 114 is different from that of the bottom plate 113 and the frame structure 112, and the first beam 114 is used for inhibiting the expansion deformation of the adjacent battery cells 21 and fixing the battery cells 21, so that the first beam 114 has high requirement on strength, and the material of the first beam 114 can comprise metal, and the material of the bottom plate 113 and the frame structure 112 can comprise nonmetal material with light weight because the requirement on strength of the bottom plate 113 and the frame structure 112 is relatively low.

The heat exchange assembly 30 is a structure for exchanging heat with each battery unit 21 in the battery device 100, the heat exchange assembly 30 can reduce or raise the temperature of the battery unit 21, and the heat exchange assembly 30 can comprise a direct cooling structure, a liquid cooling structure, an electric heating structure and other structures of an air cooling structure.

The heat exchange assembly 30 is at least partially connected to the bottom plate 113, and since the heat exchange assembly 30 may have different structures, only a part of the structures of the heat exchange assembly 30 may be connected to the bottom plate 113, or the whole heat exchange assembly 30 may be connected to the bottom plate 113.

The heat exchange assembly 30 is at least partially connected to the side of the bottom plate 113 facing the accommodating space 111, that is, the heat exchange assembly 30 is located in the accommodating space 111, so that the heat exchange assembly 30 can exchange heat with each battery cell 21 in the accommodating space 111, and the heat exchange assembly 30 can be connected to the bottom plate 113 by bonding, screwing or other manners.

At least a portion of the first beam 114 is connected to a side of the heat exchange assembly 30 facing the receiving space 111 to be indirectly connected to the bottom plate 113 through the heat exchange assembly 30, the first beam 114 may be completely connected to the heat exchange assembly 30 or may be only partially connected to the heat exchange assembly 30 according to a relative position and a coverage area of the heat exchange assembly 30 and the first beam 114, and the first beam 114 may be connected to the heat exchange assembly 30 by welding, bonding or other means.

The first beam 114 is difficult to connect with the bottom plate 113 and the frame structure 112 in a welding manner, but can only connect with the bottom plate 113 and the frame structure 112 in a screwing manner, an adhesive manner or the like, and the first beam 114 is relatively small in connection area with the bottom plate 113 and the frame structure 112, and is relatively low in connection stability in a screwing manner, an adhesive manner or the like, and the first beam 114 is easy to cause the reduction of the service life of a connection part and failure due to the periodical expansion deformation of the battery cell 21 when being born for a long time.

The heat exchange assembly 30 is used for heat exchange with each battery cell 21, so the area of the heat exchange assembly 30 is generally larger, the connection area between the heat exchange assembly 30 and the bottom plate 113 is correspondingly larger, the connection between the heat exchange assembly 30 and the bottom plate 113 is more stable, and the risk of the heat exchange assembly 30 separating from the bottom plate 113 is lower.

Accordingly, the first beam 114 is connected to the heat exchange assembly 30, and the heat exchange assembly 30 is connected to the bottom plate 113, that is, even if the first beam 114 is indirectly connected to the bottom plate 113 through the heat exchange assembly 30, at this time, a portion of the force received by the first beam 114 can be transferred to the heat exchange assembly 30, and the heat exchange assembly 30 can share the force received by the first beam 114, thereby improving the strength of the first beam 114 and the capacity of the first beam 114 to inhibit the expansion and deformation of the battery cell 21.

Meanwhile, the heat exchange assembly 30 is made of the same or similar material as the first beam 114, and at this time, the first beam 114 and the heat exchange assembly 30 can be connected by welding, so that the strength and the connection stability of the connection part between the first beam 114 and the heat exchange assembly 30 are improved, the strength of the first beam 114 is further improved, and the capacity of the first beam 114 for inhibiting the expansion and deformation of the battery cell 21 is improved.

In the case that the first beam 114 has two or more first beams 114, the plurality of first beams 114 are connected to the heat exchange assembly 30, and forces in different directions borne by the plurality of first beams 114 can be transferred to the heat exchange assembly 30, so that the heat exchange assembly 30 can balance the portions of the forces borne by the first beams 114, thereby better improving the strength of the first beams 114 and the capacity of the first beams 114 to inhibit the expansion and deformation of the battery cells 21.

In this embodiment, the materials of the first beam 114 and the bottom plate 113 and the frame structure 112 are different, so that the bottom plate 113 and the frame structure 112 can be made of lighter materials so as to reduce the overall weight of the case 10, and the first beam 114 is connected to the bottom plate 113 through the heat exchange assembly 30 to improve the connection stability of the first beam 114 and improve the strength of the first beam 114, thereby making the first beam 114 capable of better inhibiting the expansion deformation of the battery cell 21.

Referring to fig. 3 to 7, in some embodiments, the heat exchange assembly 30 includes a tube 31, the tube 31 has a flow channel 311 for flowing a heat exchange medium therein, the tube 31 is connected to the bottom plate 113, and at least a portion of the first beam 114 is connected to a side of the tube 31 facing away from the bottom plate 113.

The tube body 31 refers to a structure for carrying and accommodating heat exchange media in the heat exchange assembly 30, the tube body 31 can be of a flat runway-shaped structure, a prismatic, cylindrical or other shaped structure, the tube body 31 can extend in a straight line direction, can be of a bending structure, the number of the tube bodies 31 can be one or two or more, in the case that the number of the tube bodies 31 is two or more, each tube body 31 can be connected in series, in parallel or in series-parallel, and the material of the tube body 31 can comprise metal, plastic or other materials.

The tube body 31 is connected to the bottom plate 113, the tube body 31 can be connected to the bottom plate 113 by welding, bonding, screwing or other methods, and the tube body 31 is also positioned on the side of the bottom plate 113 facing the accommodating space 111 because the heat exchange component 30 is connected to the side of the bottom plate 113 facing the accommodating space 111, so that the heat exchange medium in the tube body 31 can exchange heat with the adjacent battery cells 21.

The flow channel 311 is a channel structure arranged in the pipe body 31, the flow channel 311 is used for flowing heat exchange medium, so that the heat exchange medium in the flow channel 311 can exchange heat with the battery cells 21 adjacent to the pipe body 31, the cross section of the flow channel 311 can be in a runway shape, a round shape, a square shape or other shapes, the cross section of the flow channel 311 can be arranged according to the cross section of the pipe body 31, and one flow channel 311 can be arranged in one pipe body 31, and two or more flow channels 311 can be arranged.

The heat exchange medium flowing in the flow channel 311 can be a refrigerant, water or other mediums, and the heat exchange medium can be in a liquid state, a solid-liquid mixed state or other states.

It will be appreciated that the heat exchange assembly 30 may include a pressure supply device or other structure in addition to the tube 31.

At least a portion of the first beam 114 is connected to a side of the pipe 31 facing away from the bottom plate 113, and the first beam 114 may be completely connected to the pipe 31 or may be only partially connected to the pipe 31 according to a specific structure of the pipe 31, and the first beam 114 may be connected to the pipe 31 by welding, bonding, screwing or other methods.

The present embodiment provides specific structures of the heat exchange assembly 30, such that the heat exchange assembly 30 includes the pipe body 31, and the first beam body 114 is at least partially connected to the pipe body 31, so as to improve the connection stability of the first beam body 114 through the connection between the pipe body 31 and the first beam body 114, thereby improving the strength of the first beam body 114 and inhibiting the expansion and deformation of the battery cell 21.

In some embodiments, the first beam 114 is welded to the tube 31.

First beam 114 is welded to tube 31, and first beam 114 may be welded to tube 31 by brazing, laser welding, or other means.

Because the first beam 114 is welded to the pipe 31, the materials of the first beam 114 and the pipe 31 are the same or similar, so that the first beam 114 can be stably welded to the pipe 31, and the first beam 114 and the pipe 31 are not easy to damage.

The first beam 114 is welded to the pipe 31 to improve the connection stability between the first beam 114 and the pipe 31 because the area of the first beam 114 that can be connected to the pipe 31 is limited, and the arrangement can prevent the connection part between the first beam 114 and the pipe 31 from being damaged and the first beam 114 from being separated from the pipe 31 when the first beam 114 receives the expansion deformation of the adjacent battery cell 21, thereby improving the strength of the first beam 114 and the capacity of the first beam 114 to inhibit the expansion deformation of the battery cell 21.

Because the materials of the first beam 114 and the bottom plate 113, and the frame structure 112 are different, and the materials of the first beam 114 and the pipe 31 are the same or similar, the materials of the pipe 31 and the bottom plate 113, and the frame structure 112 are different, and at this time, the pipe 31 can be connected to the bottom plate 113 by bonding, screwing, or the like. Since the connection area between the pipe body 31 and the bottom plate 113 is large, the connection stability between the pipe body 31 and the bottom plate 113 is good, and in the case where a portion of the force received by the first beam 114 is transmitted to the pipe body 31, the pipe body 31 is difficult to separate from the bottom plate 113.

In this embodiment, the first beam 114 is welded to the pipe 31, that is, the material of the first beam 114 is similar to that of the pipe 31, so that the connection stability of the first beam 114 is further improved by the welding method, and the performance of the first beam 114 for inhibiting the expansion of the battery cell 21 can be improved.

Referring to fig. 4 to 7, in some embodiments, the number of the tubes 31 is at least two, and the at least two tubes 31 are arranged at intervals along the first direction, the length direction of the first beam 114 is parallel to the first direction, one part of the first beam 114 is connected to the tubes 31, and the other part of the first beam 114 is connected to the bottom plate 113.

The number of the tube bodies 31 is at least two, the number of the tube bodies 31 can be two, three or more, the at least two tube bodies 31 can be connected in series, parallel or series-parallel, the at least two tube bodies 31 are arranged at intervals along a first direction, and the first direction can be the length direction X of the battery device 100, the width direction Y of the battery device 100 or other directions.

In the case where the respective tube bodies 31 are arranged in the first direction, the longitudinal direction of the tube bodies 31 may be perpendicular to the first direction or may be inclined with respect to the first direction.

The length direction of the first beam 114 is parallel to the first direction, that is, the first beam 114 is perpendicular to the arrangement direction of the tubes 31, and at this time, the first beam 114 can be connected to a plurality of different tubes 31.

Since the pipe bodies 31 are arranged at intervals, only a part of the first beam body 114 can be adjacent to the pipe bodies 31, and the other part of the first beam body 114 corresponds to the interval space between the pipe bodies 31, and at this time, the part corresponding to the interval space between the first beam body 114 and the pipe bodies 31 can be connected to the bottom plate 113, or can be arranged in a suspended state or indirectly connected to the bottom plate 113 through other intermediate structures.

The present embodiment provides an arrangement manner of some tubes 31, where the tubes 31 are arranged at intervals, so that a portion of the first beam 114 is connected to the tubes 31 to improve the connection stability of the first beam 114, and another portion of the first beam 114 is connected to the bottom plate 113 to assist in improving the connection stability of the first beam 114, thereby better improving the performance of the first beam 114 in inhibiting the expansion of the battery cell 21.

Referring to fig. 4-7, in some embodiments in which at least two tubes 31 are spaced apart along a first direction, a first beam 114 is bolted to the base plate 113, and/or the first beam 114 is bonded to the base plate 113.

Since at least two of the tubes 31 are disposed at intervals in the first direction, a portion of the first beam 114 corresponds to the interval space between the tubes 31, and it is difficult for the portion of the first beam 114 to be connected to the tubes 31. Accordingly, the portions of the first beam 114 corresponding to the space between the respective pipes 31 are connected to the bottom plate 113, so as to assist in improving the strength and connection stability of the first beam 114.

The first beam 114 may be connected to the bottom plate 113 by bolts or may be adhered to the bottom plate 113 by glue, and the first beam 114 may contact the bottom plate 113 or may be spaced apart from the bottom plate 113 according to the structures of the pipe 31 and the bottom plate 113, and in the case where the first beam 114 is spaced apart from the bottom plate 113, an intermediate structure may be provided between the first beam 114 and the bottom plate 113 to fill the space.

Since the material of the first beam 114 is different from the material of the bottom plate 113 and the frame structure 112, it is difficult for the first beam 114 to be connected to the bottom plate 113 by welding. Accordingly, the present embodiment provides a manner in which the first beams 114 are connected to the bottom plate 113, so that the first beams 114 are connected to the bottom plate 113 by screwing or bonding, so as to further improve the connection stability of the first beams 114, and meanwhile, further improve the strength of the first beams 114, thereby better improving the capability of the first beams 114 to inhibit the expansion and deformation of the battery cells 21.

Referring to fig. 4 to 7, in some embodiments, a side of the bottom plate 113 facing the receiving space 111 is provided with a receiving groove 1131, and at least a portion of the tube body 31 is received in the receiving groove 1131.

The accommodating groove 1131 is a groove structure formed on one side of the bottom plate 113 facing the accommodating space 111, the accommodating groove 1131 may be formed by deforming a part of the bottom plate 113 to one side facing away from the accommodating space 111, the accommodating groove 1131 may be a groove structure directly formed on one side of the bottom plate 113 facing the accommodating space 111, the accommodating groove 1131 may be a square groove, a semicircular groove or a groove structure with other shapes, and the number of the accommodating grooves 1131 may be one or two or more.

At least part of the tube body 31 is accommodated in the accommodating groove 1131, that is, the tube body 31 can be only partially accommodated in the accommodating groove 1131, the tube body 31 can also be completely accommodated in the accommodating groove 1131, the shape of the accommodating groove 1131 can be matched with the shape of the tube body 31, and the shape of the accommodating groove 1131 can also be different from the shape of the tube body 31.

In the case where at least a portion of the tube 31 is received in the receiving groove 1131, the portion of the tube 31 received in the receiving groove 1131 may be attached to the bottom or side of the receiving groove 1131 by bonding, screwing or other means to fix the tube 31 in the receiving groove 1131 and improve the connection stability of the tube 31.

Since the tube bodies 31 are disposed at the side of the bottom plate 113 facing the accommodation space 111, in the case where the tube bodies 31 are arranged at intervals in the first direction, there is an interval between the tube bodies 31, and the tube bodies 31 are higher than the bottom plate 113, thereby causing the bottom of the accommodation space 111 to be rugged and easily interfering with the arrangement and installation of the battery cells 21. Accordingly, the accommodating groove 1131 is provided, and the tube body 31 is at least partially accommodated in the accommodating groove 1131, so as to reduce interference of the arrangement of the tube body 31 to the arrangement and installation of the battery cells 21.

In the case that the pipe bodies 31 are arranged at intervals in the first direction, a part of the first beam bodies 114 is connected to the pipe bodies 31, and another part of the first beam bodies 114 is connected to the bottom plate 113, at this time, in the case that at least a part of the pipe bodies 31 are accommodated in the accommodating grooves 1131, the space between the first beam bodies 114 and the bottom plate 113 at intervals of the pipe bodies 31 is small, so that the connection of the first beam bodies 114 to the bottom plate 113 is facilitated, and the connection stability between the first beam bodies 114 and the bottom plate 113 is facilitated to be improved.

In this embodiment, the accommodating groove 1131 is provided on the bottom plate 113, so as to accommodate the pipe body 31 through the accommodating groove 1131, thereby reducing the height of the pipe body 31 higher than the bottom plate 113, and enabling the bottom surface of the accommodating space 111 to be smoother, so that the installation and arrangement of the battery cells 21 can be facilitated, and the connection of the first beam 114 to the pipe body 31 and the bottom plate 113 is also facilitated.

Referring to fig. 4-7, in some embodiments, the surface of the tube 31 that is attached to the first beam 114 is flush with the surface of the base plate 113 that is attached to the first beam 114.

The surface of the pipe body 31 connected to the first beam 114 means a surface of the pipe body 31 facing the accommodation space 111, which faces the accommodation space 111 and does not correspond to a side surface or a bottom surface of the accommodation groove 1131 in a case where at least a part of the pipe body 31 is accommodated in the accommodation groove 1131.

The surface of the bottom plate 113 connected to the first beam 114 means the surface of the bottom plate 113 carrying the battery cell 21, which is flush with the surface of the tube 31 facing the accommodating space 111, that is, the tube 31 is completely accommodated in the accommodating groove 1131, and the height of the tube 31 is the same as the depth of the accommodating groove 1131, at this time, in the case that a portion of the first beam 114 is connected to the tube 31, another portion of the first beam 114 can be attached to the bottom plate 113, and no gap exists between the portion of the first beam 114 and the bottom plate 113, so that the portion of the first beam 114 is directly connected to the bottom plate 113 by screwing, bonding, or the like.

Meanwhile, under the arrangement, the bottom of the receiving space 111 is relatively flat, thereby facilitating the arrangement and installation of the battery cells 21.

The present embodiment can make the bottom surface of the accommodating space 111 smoother, thereby facilitating the installation and arrangement of the battery cells 21, and at the same time, making the first beam 114 more stably connected to the pipe body 31 and the bottom plate 113.

Referring to fig. 4 and 5, in some embodiments, the first beams 114 have two and are spaced apart in the second direction, and a first space 1111 is formed between the two first beams 114 in the second direction, and the battery cell assembly 20 is received in the first space 1111.

The two first beams 114 are arranged at intervals along the second direction, a first space 1111 is formed between the two first beams 114 to accommodate the battery unit assembly 20, and when the battery unit assembly 20 is accommodated between the two first beams 114, the battery unit 21 adjacent to the first beams 114 in the battery unit assembly 20 can be abutted against the first beams 114, and in the process of charging and discharging the battery device 100, the first beams 114 can inhibit expansion deformation of the adjacent battery unit 21.

The second direction may be a direction different from the first direction, and the second direction may be the longitudinal direction X of the battery device 100, or may be the width direction Y or other directions of the battery device 100. For example, the first direction may be a width direction Y of the battery device 100, and the second direction may be a length direction X of the battery device 100.

Since the two first beams 114 are arranged at intervals along the first direction, a space structure can be formed between the two first beams 114, the space structure is a first space 1111, the first space 1111 is a space structure with an opening, and the first space 1111 can be a cuboid space structure, a cylindrical space structure or a space structure with other shapes.

The battery cell assembly 20 is accommodated in the accommodating space 111, the battery cell assembly 20 is located in the first box 11, at this time, the bottom plate 113 of the first box 11 can bear the battery cell assembly 20 and provide support for the battery cell assembly 20, the battery cell assembly 20 is also accommodated in the first space 1111, that is, the battery cell assembly 20 is located between the two first beams 114, and the two first beams 114 can clamp the battery cell assembly 20 to fix the battery cell assembly 20, and meanwhile, the first beams 114 can also inhibit expansion deformation of the adjacent battery cells 21.

Under the condition that two first beam bodies 114 exist, the two first beam bodies 114 are connected with the heat exchange assembly 30, the directions of the forces born by the two first beam bodies 114 are opposite, and part of the forces similar to the directions can be transferred to the heat exchange assembly 30, so that the heat exchange assembly 30 can balance the parts of the forces born by the two first beam bodies 114, the effect of improving the strength of the first beam bodies 114 can be better achieved, and the capacity of the first beam bodies 114 for inhibiting the expansion deformation of the battery cells 21 is improved.

The present embodiment provides an arrangement manner of some first beams 114, and the battery cell assembly 20 is disposed between two first beams 114, so as to inhibit the expansion and deformation of the battery cell 21 from two sides of the battery cell assembly 20 through the two first beams 114, thereby better inhibiting the expansion and deformation of the battery cell 21.

Referring to fig. 4,5 and 8, in some embodiments, in the second direction, a second space 1112 is formed between any one of the first beams 114 and the frame structure 112, and the heat exchange assembly 30 further includes a current collector 32 accommodated in the second space 1112, the current collector 32 is in communication with the flow channel 311 in the tube 31, and the current collector 32 is spaced apart from the first beams 114.

The second space 1112 refers to a space structure surrounded by the first beam 114 and the frame structure 112, and the second space 1112 may be a prismatic space, a cylindrical space or another space structure according to the shape of the frame structure 112, and the second space 1112 is used for accommodating high-voltage, low-voltage or other electronic devices in the battery device 100.

In the case of two first beams 114, the number of the second spaces 1112 may be one or two, and since the second spaces 1112 are defined by the first beams 114 and the frame structure 112, the second spaces 1112 and the first spaces 1111 are located at two sides of the corresponding first beams 114, respectively, and the first spaces 1111 and the second spaces 1112 are arranged along the second direction.

The current collector 32 refers to a structure for converging and distributing heat exchange media in the heat exchange assembly 30, the current collector 32 may have a plate structure, a tubular structure or other shapes, a channel for the heat exchange media to flow may be arranged in the current collector 32 and is communicated with the flow channel 311, so that the heat exchange media in the flow channel 311 can enter the current collector 32, the heat exchange media in the current collector 32 can also enter the flow channel 311, and in the case that a plurality of tube bodies 31 are provided, a plurality of tube bodies 31 can be connected to the same current collector 32.

The current collector 32 is accommodated in the second space 1112, the current collector 32 may be connected to the first beam 114, the frame structure 112 or the bottom plate 113, the current collector 32 may be directly connected to the first beam 114, the frame structure 112 or the bottom plate 113, or may be indirectly connected to the first beam 114, the frame structure 112 or the bottom plate 113 through an intermediate structure such as a bracket.

The current collector 32 is spaced apart from the first beam 114, i.e., a space exists between the current collector 32 and the first beam 114. During the charge-discharge cycle of the battery cell 21, the expansion deformation of the battery cell 21 may cause the first beam 114 to deform into the second space 1112, so that the current collector 32 and the first beam 114 are spaced apart, and the deformation of the first beam 114 is difficult to collide or contact with the current collector 32, thereby reducing the risk of damaging the current collector 32 due to the expansion of the first beam 114.

In this embodiment, the current collector 32 is spaced from the first beam 114, so that damage to the current collector 32 caused by deformation of the first beam 114 can be reduced.

Referring to fig. 4, 5, and 8, in some embodiments, a portion of the tube 31 extends to a side of the first beam 114 facing away from the first space 1111.

Since the tube 31 is used for heat exchange with the battery cells 21 and the battery cells 21 are located in the first space 1111, most of the tube 31 corresponds to the first space 1111, and a part of the tube 31 extends into the second space 1112, that is, an end of the tube 31 can extend into the second space 1112 beyond the first beam 114, and in the case where there are two second spaces 1112, only one end of the tube 31 may extend into the adjacent second space 1112, or both ends of the tube 31 may extend into the adjacent second space 1112.

In the case that the accommodating groove 1131 is provided on the bottom plate 113, a portion of the accommodating groove 1131 also extends into the second space 1112 correspondingly, so as to facilitate the fitting and accommodating of the tube 31.

The end of the pipe body 31 extends to the second space 1112 and is located in the second space 1112, so that the first beam body 114 and the end of the pipe body 31 can be staggered, the first beam body 114 can be stably connected to the pipe body 31, the force on the first beam body 114 can be better transferred to the pipe body 31, and the pipe body 31 can better share the force born on the first beam body 114.

The portion of the tube 31 located within the second space 1112 is also capable of heat exchanging with devices in the second space 1112 to facilitate temperature control in the second space 1112.

In this embodiment, a portion of the tube 31 is extended into the second space 1112, so that the tube 31 can exchange heat with devices in the second space 1112 and control the temperature in the second space 1112, and meanwhile, the arrangement can stagger the ends of the first beam 114 and the tube 31, so that the part of the force borne by the first beam 114 can be better transferred to the tube 31, so that the tube 31 can better share the force borne by the first beam 114 and can better improve the strength of the first beam 114.

Referring to fig. 10, in some embodiments, the first case 11 further includes a reinforcement 115, where the reinforcement 115 is located on a side of the first beam 114 facing away from the first space 1111, one end of the reinforcement 115 is connected to the bottom plate 113 and/or the frame structure 112, and the other end of the reinforcement 115 is connected to the side of the first beam 114 facing away from the first space 1111.

The reinforcement 115 refers to a structure in the first box 11 for supporting the first beam 114, where the reinforcement 115 may include a supporting rod, a reinforcing rib, or other reinforcement structures, the reinforcement 115 may be a column, a block, a frame, or other structures, the reinforcement 115 may be an integrally formed member, or may be formed by connecting a plurality of different members, and the reinforcement 115 may be made of metal, plastic, or other materials.

Because the expansion force applied to the first beam 114 is directed from the first space 1111 to the second space 1112 in the process of charging and discharging the battery cell 21, the deformation or deformation trend of the first beam 114 is also directed to the second space 1112, the reinforcement 115 is arranged on one side of the first beam 114 facing away from the first space 1111, so that the capacity of the first beam 114 for inhibiting the expansion deformation of the battery cell 21 is improved by the reinforcement 115, and meanwhile, part of the force born by the first beam 114 can be transferred to the reinforcement 115 and transferred to the frame structure 112 and the bottom plate 113 through the reinforcement 115, so that the reinforcement 115, the frame structure 112 and the bottom plate 113 better share the bearing force on the first beam 114, thereby improving the strength of the first beam 114.

The reinforcement member 115 may be connected to the first beam 114 by welding, bonding, screwing or other means, the reinforcement member 115 may be connected to the frame structure 112 or the bottom plate 113 by welding, bonding, screwing or other means, and one end of the reinforcement member 115 may be connected to only the frame structure 112 or the bottom plate 113, or may be connected to both the frame structure 112 and the bottom plate 113.

In the present embodiment, the reinforcement 115 is provided to further increase the strength of the first beam 114 by the reinforcement 115, so that the ability of the first beam 114 to suppress the expansion deformation of the battery cell 21 can be improved.

Referring to fig. 4 to 6 and 9, in some embodiments, the first beam 114 is spaced apart from the frame structure 112 along the length direction of the first beam 114, or two ends of the first beam 114 along the length direction are respectively screwed or adhered to adjacent frame structures 112.

The length direction of the first beam 114 may be the length direction X of the battery device 100, or may be the width direction Y of the battery device 100 or other directions, and in this case, two first beams 114 are arranged at intervals along the length direction X of the battery device 100, where the length direction of the first beam 114 is parallel to the width direction Y of the battery device 100.

The first beam 114 may be spaced from the frame structure 112 along the length direction thereof, that is, two ends of the first beam 114 along the length direction thereof are not connected or contacted with the frame structure 112, that is, the length of the first beam 114 is smaller than the dimension of the accommodating space 111 along the length direction of the first beam 114.

Because the materials of the first beam 114 and the frame structure 112 are different, the first beam 114 needs to be installed in the first box 11 after the first box 11 is processed, so as to reduce the installation difficulty and prevent the first beam 114 from colliding with the frame structure 112 during the installation process, and the first beam 114 and the frame structure 112 are arranged at intervals, so that the first beam 114 is installed conveniently.

The two ends of the first beam 114 along the length direction thereof can be respectively connected to the adjacent frame structures 112 in a screwed or bonded manner, at this time, the part of the force born by the first beam 114 can be transferred to the frame structures 112, and the frame structures 112 can share the part of the force born by the first beam 114, thereby improving the strength of the first beam 114.

For example, in the case where the first beam 114 is a box beam, the areas of the two ends of the first beam 114 along the length direction thereof are small, and it is difficult to provide the bolt mounting locations or the bonding locations, at this time, sealing plates may be provided at the two ends of the first beam 114 along the length direction thereof, so that the two ends of the first beam 114 along the length direction thereof are connected to the frame structure 112.

The present embodiment provides some relations between the first beam 114 and the frame structure 112, so that the first beam 114 and the frame structure 112 are spaced apart to facilitate the installation of the first beam 114, and the first beam 114 is connected to the frame structure 112 by screwing or bonding, so that the frame structure 112 can share a part of force on the first beam 114, thereby better improving the strength of the first beam 114 and improving the capability of inhibiting the expansion and deformation of the battery cell 21.

In some embodiments, the bottom plate 113 is integrally formed with the bezel structure 112.

The frame structure 112 and the bottom plate 113 are integrally formed, and the frame structure 112 and the bottom plate 113 may be integrally formed by die casting, injection molding or other methods.

The frame structure 112 and the bottom plate 113 are integrally formed, so that the overall performance of the first box 11 can be improved, the first box 11 has higher strength, rigidity and stability, meanwhile, the production efficiency can be improved, and the overall weight of the first box 11 can be reduced.

In this embodiment, the bottom plate 113 and the frame structure 112 are integrally formed, so that the first case 11 can have higher structural strength and rigidity, and at the same time, the connectors can be saved and the weight can be reduced.

In some embodiments, the material of the first box 11 comprises a non-metal composite material, and the material of the first beam 114 comprises a metal.

The first case 11 is mainly used for providing the accommodating space 111 for the battery cell assembly 20 and other structures, and some electronic components in the battery device 100 need to be directly connected to the first case 11, so the first case 11 should have a certain insulation performance, and meanwhile, can have a certain corrosion resistance performance in the case that the cooling medium, electrolyte or other substances of the battery device 100 overflow.

For the battery device 100, particularly the battery device 100 applied to the vehicle 1000, the risk of collision of the peripheral side of the case 10 is relatively low, and the bottom of the case 10 is generally provided with a bottom cover, that is, the first case 11 has a relatively low demand for strength.

Accordingly, the material of the first case 11 includes a non-metal composite material, that is, the material of the bottom plate 113 and the frame structure 112 includes a non-metal composite material, where the non-metal composite material is a composite material with a non-metal material as a main material, and the main material of the non-metal composite material may include a resin and a fiber material.

Compared with a metal material or a metal composite material, the non-metal composite material can be lighter in weight, can provide a mounting base and protection for the battery device 100 or other structures, can reduce the overall weight of the battery device 100, and can meet various different requirements of insulation, corrosion resistance and the like.

The material of the first beam 114 includes metal, the material of the first beam 114 may include iron, aluminum, copper, steel or metal thereof, the material of the first beam 114 may include only one metal or two or more different metals, and the material of the first beam 114 may include other materials besides metal, so that the first beam 114 may have more different properties.

Since the first beam 114 is used for fixing the battery cell assembly 20 and for suppressing the expansion and deformation of the battery cell 21, the first beam 114 has a relatively high requirement for strength. Accordingly, the material of the first beam 114 includes a metal material, so that the first beam 114 can have higher strength, thereby better inhibiting the expansion and deformation of the battery cell 21, and better fixing the battery cell assembly 20.

In this embodiment, the material of the first case 11 is made of a non-metal composite material, so that the first case 11 can provide support for the battery cell 21 and provide protection for the battery cell 21, and meanwhile, the weight of the first case 11 can be lighter, so as to reduce the negative influence of the first case 11 on the overall weight of the battery device 100, and the material of the first beam 114 is made of metal, so that the first beam 114 can have higher strength, and thus the first beam 114 can better inhibit the expansion deformation of the battery cell 21.

In some embodiments, the materials of the base plate 113 and the frame structure 112 include resin and fiber.

The resin is a high molecular compound, and may include natural products such as rosin, amber, shellac, etc., and also artificial synthetic products such as polyethylene, epoxy resin, polyester resin, etc. The resin has the advantages of light weight, corrosion resistance, good electrical insulation performance, high processing efficiency and the like.

The fiber is a filament-shaped or bundle-shaped material with high strength, high rigidity and large length-diameter ratio, can be glass fiber, carbon fiber or other fiber materials, and has the advantages of high strength, light weight, corrosion resistance, good electrical insulation performance, good heat insulation performance and the like.

The base plate 113 and the frame structure 112 are made of resin and fiber, so that the first case 11 can have a light weight, good electrical insulation property, good corrosion resistance property, and certain strength and supporting property, so that the first case 11 can provide a certain protection for the battery cells 21 and can also have a light weight to reduce the overall weight of the battery device 100.

The specific materials of the bottom plate 113 and the frame structure 112 are provided in this embodiment, so that the first box 11 can have a certain strength, and also has the advantages of good insulation performance, good corrosion resistance, light weight and the like.

Referring to fig. 4 to 6 and 9, in some embodiments, the first case 11 further includes a second beam 116, and the second beam 116 is connected to a side of the frame structure 112 facing away from the accommodating space 111.

The second beam 116 refers to a structure in the first box 11 for improving the strength of the frame structure 112, the second beam 116 may be an i-beam, a box beam or other beam structures, the second beam 116 is connected to the frame structure 112, the second beam 116 may be welded, adhered or otherwise connected to the frame structure 112, and the second beam 116 may be made of metal, plastic or other materials.

The number of the second beams 116 may be one or two or more. In an example, in the case where the frame structure 112 is a quadrangular structure, the second beam 116 may have four sides and be connected to four sides of the frame structure 112, respectively, and in an example, in the case where the frame structure 112 is a quadrangular structure, the second beam 116 may have two sides and correspond to two sides of the frame structure 112 in the width direction Y of the battery device 100, respectively.

The second beam 116 is connected to a side of the frame structure 112 away from the accommodating space 111, that is, the second beam 116 is located outside the frame structure 112, which can reduce the occupation of the accommodating space 111 by the second beam 116, so as to reduce the adverse effects of the arrangement of the second beam 116 on the utilization rate of the accommodating space 111 and the energy density of the battery device 100.

The provision of the second beam 116 can also provide a mounting base for mounting structures or other external structures of the battery device 100.

In the present embodiment, the second beam 116 is provided to enhance the strength of the side portion of the first case 11 by the second beam 116, and also to facilitate the mounting of the battery device 100 on the chassis or other parts of the vehicle 1000 by the second beam 116.

In some embodiments, the material of the second beam 116 comprises metal.

The material of the second beam 116 includes metal, the material of the second beam 116 may include iron, aluminum, copper, steel or metal thereof, the material of the second beam 116 may include only one metal or two or more different metals, and the material of the second beam 116 may include other materials besides metal, so that the second beam 116 may have more different properties.

Because the second beam 116 is used for improving the strength of the side surface of the frame structure 112, the material of the second beam 116 includes metal, so that the second beam 116 can better support the side surface of the frame structure 112, thereby improving the strength of the side surface of the frame structure 112 and reducing the risk of deformation of the side surface of the frame structure 112.

In this embodiment, the material of the second beam 116 includes metal, so that the second beam 116 can have higher strength to better protect the bottom of the battery device 100, and meanwhile, the risk of penetration of external impurities into the first case 11 can be reduced, thereby better protecting the battery cells 21.

In some embodiments, the battery device 100 includes a case 10, a battery cell assembly 20, and a heat exchange assembly 30.

The case 10 includes a first case 11 and a second case 12 connected to the first case 11. The first case 11 includes a frame structure 112 and a bottom plate 113 connected to the frame structure 112, where the frame structure 112 and the bottom plate 113 are integrally formed, and the frame structure 112 and the bottom plate 113 enclose an accommodating space 111.

The frame structure 112 and the bottom plate 113 are made of non-metal composite materials.

The first case 11 further includes two first beams 114 arranged at intervals along a length direction X of the first case, the length direction of the first beams 114 is parallel to a width direction Y of the battery device 100, a first space 1111 is formed between the two first beams 114, the battery cell assembly 20 is accommodated in the first space 1111, and a second space 1112 is formed between the first beams 114 and the frame structure 112 in the length direction X of the battery device 100.

The material of the first beam 114 includes metal.

The heat exchange assembly 30 comprises a plurality of tubes 31 which are arranged at intervals along the width direction Y of the battery device 100, the length direction of each tube 31 is parallel to the length direction X of the battery device 100, a containing groove 1131 is formed in one side of the bottom plate 113 facing the containing space 111, the tubes 31 are contained in the containing groove 1131, the surface of each tube 31 facing the containing space 111 is flush with the surface, connected with the beam, of the bottom plate 113, and the tubes 31 are adhered to the bottom surface and the side surface of the containing groove 1131.

The material of the tube 31 includes metal.

A portion of the first beam 114 is welded to the pipe body 31, and another portion of the first beam 114 is connected to the bottom plate 113 by bolts or structural adhesive.

The second space 1112 accommodates the current collectors 32 therein, the current collectors 32 are connected to the sides of the respective first beams 114 facing away from the first space 1111 by brackets, and a gap exists between the current collectors 32 and the respective first beams 114.

A second beam 116 is connected to a side of the frame structure 112 facing away from the first space 1111, and a material of the second beam 116 includes metal.

In a second aspect, embodiments of the present application provide an electrical device, including the battery device 100 provided by some embodiments of the first aspect.

In the power utilization device, the frame structure 112 of the battery device 100 and the material of the bottom plate 113 both comprise non-metal composite materials, the overall weight of the battery device 100 is lighter, meanwhile, the first beam 114 is welded to the tube 31 of the heat exchange assembly 30, and the tube 31 is adhered to the bottom plate 113 in a large area, so that the first beam 114 has higher connection stability, and the first beam 114 has higher strength, so that the battery cell assembly 20 can be fixed conveniently and the expansion deformation of the battery cell 21 can be restrained.

It should be noted that the above embodiments are only used to illustrate the technical solution of the present application, but not to limit the technical solution of the present application, and although the detailed description of the present application is given with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application, and all the modifications or substitutions are included in the scope of the claims and the specification of the present application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (16)

1. A battery device, characterized by comprising:

The box body comprises a first box body, wherein the first box body is made of a nonmetallic composite material, the first box body comprises a frame structure and a bottom plate connected with the frame structure, an accommodating space is defined by the frame structure and the bottom plate, the first box body also comprises a first beam body accommodated in the accommodating space, and the first beam body is made of metal;

the battery monomer assembly is accommodated in the accommodating space and is propped against the first beam body;

the heat exchange assembly is at least partially connected to one side of the bottom plate facing the accommodating space;

At least part of the first beam body is welded to one side, away from the bottom plate, of the heat exchange assembly so as to be indirectly connected to the bottom plate through the heat exchange assembly.

2. The battery device according to claim 1, wherein the heat exchange assembly comprises a tube body, a flow passage for a heat exchange medium to circulate is formed in the tube body, the tube body is connected to the bottom plate, and at least part of the first beam body is connected to one side of the tube body away from the bottom plate;

The first beam body is welded to the pipe body.

3. The battery device according to claim 2, wherein the number of the tube bodies is at least two, and at least two of the tube bodies are arranged at intervals in the first direction;

the length direction of the first beam body is parallel to the first direction, one part of the first beam body is connected with the pipe body, and the other part of the first beam body is connected with the bottom plate.

4. The battery device of claim 3, wherein the first beam is bolted to the base plate, and/or

The first beam body is adhered to the bottom plate.

5. A battery device according to claim 3, wherein a receiving groove is provided in a side of the bottom plate facing the receiving space, and at least a part of the tube body is received in the receiving groove.

6. The battery device of claim 5, wherein a surface of the tube connected to the first beam is flush with a surface of the base plate connected to the first beam.

7. The battery device of any one of claims 2-6, wherein the first beams are two and spaced apart along the second direction;

In the second direction, a first space is formed between the two first beams, and the battery cell assembly is accommodated in the first space.

8. The battery device according to claim 7, wherein a second space is formed between any one of the first beams and the frame structure in the second direction;

The heat exchange assembly further comprises a current collector accommodated in the second space, the current collector is communicated with the flow channel in the pipe body, and the current collector and the first beam body are arranged at intervals.

9. The battery device of claim 7, wherein a portion of the tube extends to a side of the first beam facing away from the first space.

10. The battery device of claim 7, wherein the first housing further comprises a stiffener located on a side of the first beam facing away from the first space, one end of the stiffener being connected to the base plate and/or the frame structure, and the other end of the stiffener being connected to the side of the first beam facing away from the first space.

11. The battery device according to any one of claims 1 to 6, wherein the first beam is spaced apart from the frame structure in a longitudinal direction of the first beam, or

The two ends of the first beam body along the length direction are respectively in threaded connection or adhered to the adjacent frame structures.

12. The battery device of any one of claims 1-6, wherein the base plate is integrally formed with the bezel structure.

13. The battery device according to any one of claims 1 to 6, wherein the material of the first case includes resin and fiber.

14. The battery device of any one of claims 1-6, wherein the first housing further comprises a second beam connected to a side of the frame structure facing away from the receiving space.

15. The battery device of claim 14, wherein the material of the second beam comprises metal.

16. An electrical device comprising a battery device according to any one of claims 1-15.