Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, and relates to the field of batteries, the battery device comprises a battery monomer and a heat exchange structure, the battery monomer and the heat exchange structure are arranged along a first direction, the battery monomer comprises a shell and an electrode assembly, the shell defines a mounting space opened towards the heat exchange structure, and the electrode assembly is arranged in the mounting space. The electrode assembly is installed in the installation space, the shell is fixed to the heat exchange structure, and the heat exchange structure seals the open end of the installation space. Therefore, the shell is fixed to the heat exchange structure, and the heat exchange structure seals the open end of the mounting space, so that the shell and the heat exchange structure can be combined, the heat exchange structure can directly exchange heat with the battery monomers, and compared with the prior art, the heat transfer efficiency between the heat exchange structure and the battery monomers can be improved; therefore, the heat exchange efficiency between the heat exchange structure and the battery monomers is improved, and the use reliability of the battery device is improved.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a battery device and an electrical device having the battery device. Background Art

[0002] In the related art, the existing battery device includes a heat exchange structure and multiple battery cells. The multiple battery cells are fixed to the heat exchange structure through structural adhesive. The heat exchange structure exchanges heat with the battery cells through the structural adhesive. Since the structural adhesive is located between the heat exchange structure and the battery cells, it affects the heat transfer efficiency between the heat exchange structure and the battery cells, thereby affecting the heat exchange efficiency between the heat exchange structure and the battery cells, and further affecting the reliability of the battery device. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to provide a battery device that can improve the heat transfer efficiency between the heat exchange structure and the battery cells, thereby improving the heat exchange efficiency between the heat exchange structure and the battery cells, and further improving the reliability of the battery device.

[0004] The present application further proposes an electrical device.

[0005] In a first aspect, an embodiment of the present application provides a battery device, comprising:

[0006] The battery cell and the heat exchange structure are arranged along a first direction. The battery cell includes a shell and an electrode assembly. The shell defines an installation space open to the heat exchange structure. The electrode assembly is installed in the installation space. The shell is fixed to the heat exchange structure, and the heat exchange structure closes the open end of the installation space.

[0007] In the above technical solution, the shell is fixed to the heat exchange structure, and the heat exchange structure closes the open end of the installation space, so that the shell and the heat exchange structure can be combined, and the heat exchange structure can directly exchange heat with the battery cell. Compared with the existing technology, the heat transfer efficiency between the heat exchange structure and the battery cell can be improved, thereby improving the heat exchange efficiency between the heat exchange structure and the battery cell, and then improving the reliability of the battery device.

[0008] In some embodiments, a heat exchange medium flow channel is formed in the heat exchange structure, and the heat exchange medium flow channel and the installation space are opposite to each other along a first direction.

[0009] In the above technical solution, a heat exchange medium flow channel is formed in the heat exchange structure, and the heat exchange medium can flow into and out of the heat exchange structure. When the heat exchange medium flows out of the heat exchange structure, it can continuously take away the heat of the battery cell, thereby more quickly taking away the heat generated during the operation of the battery cell. In addition, the heat exchange medium flow channel and the installation space are relatively arranged along the first direction, thereby further improving the heat transfer efficiency between the heat exchange structure and the battery cell. The heat exchange structure can more quickly take away the heat generated during the operation of the battery cell, thereby further improving the heat exchange efficiency between the heat exchange structure and the battery cell, which is more conducive to keeping the battery cell at a suitable temperature, further extending the service life of the battery cell, and further improving the reliability of the battery device.

[0010] In some embodiments, the heat exchange medium flow channel and the installation space both extend along the second direction, the width of the heat exchange medium flow channel along the third direction is greater than or equal to the width of the installation space along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0011] In the above technical solution, by making the width dimension of the heat exchange medium flow channel along the third direction greater than or equal to the width dimension of the installation space along the third direction, it is beneficial for the heat exchange medium flow channel to cover the open end of the installation space along the first direction, and facilitates the relative arrangement of the heat exchange medium flow channel and the installation space along the first direction, thereby further improving the heat transfer efficiency between the heat exchange structure and the battery cell, thereby further improving the heat exchange efficiency between the heat exchange structure and the battery cell, and being more conducive to keeping the battery cell at an appropriate temperature, further extending the service life of the battery cell, and further improving the reliability of the battery device.

[0012] In some embodiments, the heat exchange medium flow channel and the installation space both extend along the second direction, the length of the heat exchange medium flow channel along the second direction is greater than or equal to the length of the installation space along the second direction, and the first direction is perpendicular to the second direction.

[0013] In the above technical solution, by making the length dimension of the heat exchange medium flow channel along the second direction greater than or equal to the length dimension of the installation space along the second direction, it is more conducive to making the heat exchange medium flow channel cover the open end of the installation space along the first direction, and it is more convenient for the heat exchange medium flow channel and the installation space to be arranged relative to each other along the first direction, further improving the heat transfer efficiency between the heat exchange structure and the battery cell, thereby further improving the heat exchange efficiency between the heat exchange structure and the battery cell, and being more conducive to keeping the battery cell at an appropriate temperature, further extending the service life of the battery cell, and further improving the reliability of the battery device.

[0014] In some embodiments, the heat exchange structure is formed with a medium inlet and a medium outlet, the medium inlet and the medium outlet are arranged along the second direction, and the heat exchange medium flow channel is connected between the medium inlet and the medium outlet and communicates with the medium inlet and the medium outlet.

[0015] In the above technical solution, the medium inlet and the medium outlet are connected through the heat exchange medium flow channel, the heat exchange medium flows from the medium inlet into the heat exchange medium flow channel, the heat exchange medium flows along the heat exchange medium flow channel to the medium outlet and flows out of the heat exchange structure from the medium outlet, so that the heat exchange medium can continuously take away the heat generated by the battery cell. The medium inlet and the medium outlet are relative and spaced apart along the second direction, so that the heat exchange medium can flow from one end to the other end of the heat exchange structure along the second direction, which is beneficial to increase the flow path of the heat exchange medium in the heat exchange medium flow channel, so that the heat exchange medium and the battery cell can fully exchange heat, thereby helping to improve the heat exchange effect of the heat exchange structure.

[0016] In some embodiments, the length dimension of the heat exchange structure along the second direction is greater than the length dimension of the battery cell along the second direction. Along the second direction, both ends of the heat exchange structure are formed with protrusions protruding toward one side of the battery cell. The battery cell is located between the protrusions at both ends of the heat exchange structure. The protrusions are used to abut and limit the battery cell. The first direction and the second direction are perpendicular.

[0017] In the above technical solution, the battery cell is located between the protrusions at both ends of the heat exchange structure. When the protrusions are in contact with the battery cell, the protrusions can limit the battery cell, thereby reducing the risk of the battery cell being offset relative to the heat exchange structure, making the relative position of the battery cell and the heat exchange structure reliable, and reducing the risk of separation of the battery cell and the heat exchange structure, which is conducive to improving the assembly reliability of the battery cell and the heat exchange structure.

[0018] In some embodiments, the shell includes: a partition structure, the partition structure is located in the installation space to divide the installation space into multiple independent sub-installation spaces, the multiple sub-installation spaces are arranged in a direction perpendicular to the first direction, the battery cell includes multiple electrode assemblies, the multiple electrode assemblies are respectively arranged in the multiple sub-installation spaces, and the multiple electrode assemblies correspond one to one to the multiple sub-installation spaces.

[0019] In the above technical solution, the installation space is divided into multiple independent sub-installation spaces by a partition structure, and each sub-installation space is provided with an electrode assembly. This allows multiple electrode assemblies to be installed in a single battery cell, achieving a continuous arrangement of the electrode assemblies. Compared with the prior art, multiple battery cells can share a common housing, thereby achieving the effect of integrating multiple battery cells. This eliminates the complex process of stacking multiple battery cells, simplifies the manufacturing difficulty of the battery device, and improves the integrity of the multiple battery cells, which is beneficial for improving the rigidity and strength of the battery device, and is beneficial for improving the stability and reliability of the battery device. In addition, since multiple battery cells share a common housing, the heat exchange structure can be bonded to the housing with structural adhesive, reducing the risk of structural adhesive overflowing between the large surfaces ("large surfaces" refers to the relatively large sidewalls of the housing) of two adjacent battery cells, reducing the risk of lithium plating in the battery device, and thus improving the service life of the battery cells. At the same time, the need for buffer pads between adjacent battery cells can be eliminated, which can reduce the manufacturing cost of the battery device, improve the space utilization within the battery device, and improve the energy density and lightweight design of the battery device.

[0020] In some embodiments, the shell further includes: a shell side wall and an end cover, the shell side wall is annular to form a first open end and a second open end that are opposite and spaced apart along a first direction, the first open end is the open end of the installation space facing the heat exchange structure, the end cover is located on the side of the shell side wall away from the heat exchange structure, and the end cover closes the second open end so that the shell side wall and the end cover jointly define the installation space, and the partition structure is located inside the shell side wall.

[0021] In the above technical solution, by setting the shell side wall and the end cover, the shell defines the installation space, and by setting the partition structure in the shell side wall, the installation space is divided into multiple sub-installation spaces, so that the partition structure is set in a reasonable position.

[0022] In some embodiments, the partition structure and the shell sidewall are integrally formed.

[0023] In the above technical solution, by integrally forming the partition structure and the shell side wall, the number of parts constituting the shell can be reduced, the production efficiency of the shell can be improved, the manufacturing cost of the shell can be reduced, and it is beneficial to the large-scale production of battery devices and the improvement of the structural stability of the shell. The connection between the shell side wall and the end cover of the integrally formed part is tighter and more uniform, thereby improving the sealing performance of the battery cell.

[0024] In a second aspect, an embodiment of the present application provides an electrical device comprising the above-mentioned battery device.

[0025] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 is a schematic diagram of a vehicle according to an embodiment of the present application;

[0028] Figure 2 is a partial structural diagram of a battery device according to an embodiment of the present application;

[0029] Figure 3 is a side view of the assembled battery cell and heat exchange structure according to an embodiment of the present application;

[0030] Figure 4 is a top view of the assembled battery cell and heat exchange structure according to an embodiment of the present application;

[0031] Figure 5 yes Figure 4 Cross-section at AA;

[0032] Figure 6 yes Figure 5 Enlarged view of point B in the middle;

[0033] Figure 7 is an exploded view of a shell and a heat exchange structure according to an embodiment of the present application;

[0034] Figure 8 Schematic diagram of an electrode assembly according to an embodiment of the present application.

[0035] Reference numerals:

[0036] Battery device 100;

[0037] Battery cell 10; housing 11; mounting space 111; housing side wall 112; end cover 113; first open end 114; second open end 115;

[0038] Electrode assembly 12; partition structure 13; partition plate 131; sub-mounting space 14;

[0039] Heat exchange structure 20; heat exchange medium flow channel 21; medium inlet 22; medium outlet 23; protrusion 24; first heat exchange wall 25; second heat exchange wall 26; medium storage tank 27;

[0040] Box 30; second box 31;

[0041] Vehicle 200 ; controller 201 ; motor 202 . DETAILED DESCRIPTION

[0042] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0043] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0044] References to "embodiments" in this application mean 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 appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0046] The term "and / or" in this application simply describes the relationship between related objects, indicating that three possible relationships exist. For example, C and / or D can mean: C exists alone, C and D exist simultaneously, or D exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0047] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and do not constitute any limitation on this application.

[0048] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0049] The term "plurality" used in this application refers to two or more (including two).

[0050] The battery device mentioned in the embodiments of the present application may include a plurality of battery cells, and the plurality of battery cells are connected in series, in parallel, or in mixed series via a busbar component.

[0051] In some embodiments, a battery device includes a case and a plurality of battery cells housed in the case.

[0052] As an example, the plurality of battery cells may be housed in the case by directly fixing the battery cells to the case.

[0053] As an example, the housing may include a first housing and a second housing. The first housing and the second housing interlock to form a mounting cavity within the housing. The mounting cavity can accommodate multiple battery cells, i.e., multiple battery cells are mounted within the mounting cavity. Enclosed herein means covered or closed, and may be sealed or unsealed. The first housing may be one of the upper housing and the lower housing, and the second housing may be the other of the upper and lower housings.

[0054] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0055] The battery cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present application.

[0056] The battery cell can be cylindrical, flat, rectangular or other shapes, and the present application embodiment does not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the present application embodiment does not limit this.

[0057] A battery cell consists of a housing, an electrode assembly, and an electrolyte. The housing is used to hold the electrode assembly and electrolyte. The electrode assembly consists of an anode electrode sheet, a cathode electrode sheet, and a separator. A battery cell primarily operates by the movement of metal ions between the anode and cathode electrode sheets. The anode electrode sheet comprises an anode current collector and an anode active material layer. The anode active material layer is coated on the surface of the anode current collector. The anode current collector uncoated with the anode active material layer protrudes from the anode current collector coated with the anode active material layer. The anode current collector uncoated with the anode active material layer serves as the anode tab. For lithium-ion batteries, for example, the anode current collector can be made of aluminum, and the anode active material can be made of lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. The cathode electrode sheet comprises a cathode current collector and a cathode active material layer. The cathode active material layer is coated on the surface of the cathode current collector. The cathode current collector uncoated with the cathode active material layer protrudes from the cathode current collector coated with the cathode active material layer. The cathode current collector uncoated with the cathode active material layer serves as the cathode tab. The cathode current collector can be made of copper, and the cathode active material can be made of carbon or silicon. In order to ensure that a large current can pass without melting, the number of anode tabs is multiple and they are stacked together, and the number of cathode tabs is multiple and they are stacked together.

[0058] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a wound structure or a laminated structure, but the embodiments of the present application are not limited thereto.

[0059] In recent years, vehicles have developed rapidly. Taking new energy vehicles as an example, battery devices, as core components of vehicles, play an irreplaceable and important role.

[0060] In the related art, the existing battery device includes a heat exchange structure and multiple battery cells. The multiple battery cells are fixed to the heat exchange structure by structural adhesive. The structural adhesive is located between the heat exchange structure and the battery cells. The heat exchange structure exchanges heat with the battery cells through the structural adhesive. Since the structural adhesive is located between the heat exchange structure and the battery cells, the heat transfer efficiency between the heat exchange structure and the battery cells is affected, thereby affecting the heat exchange efficiency between the heat exchange structure and the battery cells, and further affecting the reliability of the battery device.

[0061] Based on the above considerations, and in order to address the issue of heat exchange efficiency between the heat exchange structure and the battery cells, after in-depth research, a battery device was designed, comprising: battery cells and a heat exchange structure, arranged along a first direction, the battery cells comprising a housing and an electrode assembly, the housing defining an installation space open to the heat exchange structure, the electrode assembly being mounted within the installation space, the housing being fixed to the heat exchange structure, and the heat exchange structure enclosing the open end of the installation space. The housing and heat exchange structure can be combined, enabling the heat exchange structure to directly exchange heat with the battery cells. Compared to the prior art, this improves the heat transfer efficiency between the heat exchange structure and the battery cells, thereby enhancing the heat exchange efficiency between the heat exchange structure and the battery cells, and thus improving the reliability of the battery device.

[0062] Please refer to Figure 1 , Figure 1 Schematic diagram of the structure of the vehicle 200 provided in some embodiments of the present application. The vehicle 200 can be a fuel vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. The battery device 100 is installed on the chassis of the vehicle 200. The battery device 100 can be used to power the vehicle 200, and the battery device 100 can serve as an operating power source for the vehicle 200. The vehicle 200 may also include a controller 201 and a motor 202. The controller 201 is used to control the battery device 100 to power the motor 202 for the starting, navigation and driving power requirements of the vehicle 200.

[0063] In some embodiments of the present application, the battery device 100 can serve not only as an operating power source for the vehicle 200 , but also as a driving power source for the vehicle 200 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 200 .

[0064] Reference below Figure 2-Figure 8 A battery device 100 according to an embodiment of the present application is described.

[0065] like Figure 3 、 Figure 5 and Figure 6 As shown, the battery device 100 according to an embodiment of the present application includes: a battery cell 10 and a heat exchange structure 20, the battery cell 10 and the heat exchange structure 20 are arranged along a first direction, the battery cell 10 includes a shell 11 and an electrode assembly 12, the shell 11 defines an installation space 111 open to the heat exchange structure 20, the electrode assembly 12 is installed in the installation space 111, the shell 11 is fixed to the heat exchange structure 20, and the heat exchange structure 20 closes the open end of the installation space 111.

[0066] The battery device 100 may further include a housing 30 and multiple battery cells 10. The housing 30 may include a first housing and a second housing 31. The first housing and the second housing 31 engage to form a mounting cavity within the housing 30. The mounting cavity can accommodate multiple battery cells 10, and the multiple battery cells 10 are mounted within the mounting cavity. The first housing may be one of the upper housing and the lower housing, and the second housing 31 may be the other of the upper and lower housings. This application uses the second housing 31 as the lower housing as an example.

[0067] The heat exchange structure 20 can be installed in the installation cavity of the box body 30. The battery cells 10 and the heat exchange structure 20 are arranged along a first direction. As an example, the first direction can be the height direction of the battery device 100. The height direction of the battery device 100 is Figure 3 As another example, the first direction may be a horizontal direction. This application uses the first direction as the height direction of the battery device 100 as an example for description. The battery cell 10 may be located above the heat exchange structure 20.

[0068] The battery cell 10 includes a housing 11 and an electrode assembly 12. Both the housing 11 and the heat exchange structure 20 may be metal parts. The housing 11 defines an installation space 111 with one end open. The installation space 111 is open toward the end of the heat exchange structure 20, and the electrode assembly 12 is installed in the installation space 111. The housing 11 is fixed to the heat exchange structure 20. The housing 11 can be welded to the heat exchange structure 20, the housing 11 can be snapped onto the heat exchange structure 20, or the housing 11 can be adhesively bonded to the heat exchange structure 20. The fixing method of the housing 11 and the heat exchange structure 20 is not specifically limited, as long as the housing 11 is fixed to the heat exchange structure 20. The heat exchange structure 20 closes the open end of the installation space 111, thereby sealing the installation space 111 and reducing the risk of substances in the installation space 111 flowing out of the open end of the installation space 111.

[0069] The heat exchange structure 20 may contain a heat exchange medium, which has a heat exchange function. When the temperature of the heat exchange medium is lower than that of the battery cell 10, the heat exchange structure 20 exchanges heat with the battery cell 10, lowering the temperature of the battery cell 10 and achieving the effect of cooling the battery cell 10. When the temperature of the heat exchange medium is higher than that of the battery cell 10, the heat exchange structure 20 exchanges heat with the battery cell 10, raising the temperature of the battery cell 10 and achieving the effect of heating the battery cell 10. The heat exchange structure 20 can be used to heat or cool the battery cell 10 according to actual usage requirements. This application uses the example of the heat exchange structure 20 cooling the battery cell 10 as an example.

[0070] The heat exchange structure 20 closes the open end of the installation space 111. The heat exchange structure 20 can contact the material inside the battery cell 10 to form a heat transfer channel between the heat exchange medium, the first heat exchange wall 25 of the heat exchange structure 20 close to the battery cell 10 (the first heat exchange wall 25 closes the open end of the installation space 111, and the shell 11 is installed on the first heat exchange wall 25), and the material inside the battery cell 10. Compared with the prior art, the heat transfer loss of the bottom wall of the shell 11 close to the heat exchange structure 20 and the structural adhesive is reduced, the heat transfer path is reduced, and the heat transfer efficiency between the heat exchange structure 20 and the battery cell 10 is improved. The heat exchange structure 20 can more quickly remove the heat generated by the battery cell 10 during operation, so that the heat of the battery cell 10 can be removed more and faster by the heat exchange medium, thereby improving the heat exchange efficiency between the heat exchange structure 20 and the battery cell 10, which is beneficial to keeping the battery cell 10 at an appropriate temperature, extending the service life of the battery cell 10, and thereby improving the reliability of the battery device 100. It should be noted that the heat exchange medium can be a liquid heat exchange medium or a gaseous heat exchange medium. This application takes the heat exchange medium as a coolant as an example for explanation.

[0071] In the above technical solution, the shell 11 is fixed to the heat exchange structure 20, and the heat exchange structure 20 closes the open end of the installation space 111, so that the shell 11 and the heat exchange structure 20 can be combined, and the heat exchange structure 20 can directly exchange heat with the battery cell 10. Compared with the existing technology, the heat transfer efficiency between the heat exchange structure 20 and the battery cell 10 can be improved, thereby improving the heat exchange efficiency between the heat exchange structure 20 and the battery cell 10, and further improving the reliability of the battery device 100.

[0072] According to some embodiments of the present application, Figure 6 and Figure 7 As shown, a heat exchange medium flow channel 21 is formed in the heat exchange structure 20, and the heat exchange medium flow channel 21 and the installation space 111 are opposite to each other along a first direction.

[0073] The heat exchange structure 20 may include a second heat exchange wall 26 facing away from the battery cell 10. The first heat exchange wall 25 and the second heat exchange wall 26 are arranged along a first direction. The first heat exchange wall 25 and the second heat exchange wall 26 are fixedly connected, welded, or snap-connected. The first heat exchange wall 25 and the second heat exchange wall 26 jointly define a heat exchange medium flow channel 21, or the first heat exchange wall 25 defines the heat exchange medium flow channel 21. This application uses the example of the first heat exchange wall 25 and the second heat exchange wall 26 jointly defining the heat exchange medium flow channel 21. As an example, the second heat exchange wall 26 may define a medium storage tank 27 open to the first heat exchange wall 25, and the first heat exchange wall 25 covers the open end of the medium storage tank 27, so that the first heat exchange wall 25 and the second heat exchange wall 26 jointly define the heat exchange medium flow channel 21. As an example, the heat exchange medium may be stored in the heat exchange medium flow channel 21. As another example, the heat exchange medium can flow in the heat exchange medium flow channel 21, and the heat exchange medium can flow into and out of the heat exchange medium flow channel 21. The present application takes the example of the heat exchange medium flowing into and out of the heat exchange medium flow channel 21 for explanation. When the heat exchange medium flows out of the heat exchange medium flow channel 21, it can take away the heat of the battery cell 10. The heat exchange medium flow channel 21 and the installation space 111 are arranged relative to each other along the first direction, the partial structure of the heat exchange medium flow channel 21 and the installation space 111 are arranged relative to each other along the first direction, or the overall structure of the heat exchange medium flow channel 21 and the installation space 111 are arranged relative to each other along the first direction. In other words, the partial structure of the heat exchange medium flow channel 21 and the open end of the installation space 111 are arranged relative to each other along the first direction, or the overall structure of the heat exchange medium flow channel 21 and the open end of the installation space 111 are arranged relative to each other along the first direction.

[0074] In the above technical solution, a heat exchange medium flow channel 21 is formed in the heat exchange structure 20, and the heat exchange medium can flow into and out of the heat exchange structure 20. When the heat exchange medium flows out of the heat exchange structure 20, it can continuously take away the heat of the battery cell 10, thereby more quickly taking away the heat generated during the operation of the battery cell 10. In addition, the heat exchange medium flow channel 21 and the installation space 111 are relatively arranged along the first direction, thereby further improving the heat transfer efficiency between the heat exchange structure 20 and the battery cell 10. The heat exchange structure 20 can take away the heat generated during the operation of the battery cell 10 more quickly, thereby further improving the heat exchange efficiency between the heat exchange structure 20 and the battery cell 10, which is more conducive to keeping the battery cell 10 at an appropriate temperature, further extending the service life of the battery cell 10, and further improving the reliability of the battery device 100.

[0075] According to some embodiments of the present application, Figure 7As shown, the heat exchange medium flow channel 21 and the installation space 111 both extend along the second direction, the width of the heat exchange medium flow channel 21 along the third direction is greater than or equal to the width of the installation space 111 along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0076] Among them, such as Figure 7 As shown, the second direction is Figure 7 The X direction in the third direction is Figure 7 In the Y direction, the first, second, and third directions are mutually perpendicular. The heat exchange medium flow channel 21 and the installation space 111 both extend along the second direction. As an example, the length of the heat exchange medium flow channel 21 extending along the second direction can be equal to the length of the installation space 111 extending along the second direction. As another example, the length of the heat exchange medium flow channel 21 extending along the second direction is greater than the length of the installation space 111 extending along the second direction. The width of the heat exchange medium flow channel 21 along the third direction is equal to the width of the installation space 111 along the third direction, or the width of the heat exchange medium flow channel 21 along the third direction is greater than the width of the installation space 111 along the third direction. When the width of the heat exchange medium flow channel 21 along the third direction is equal to the width of the installation space 111 along the third direction, the heat exchange medium flow channel 21 has two flow channel side edges along the third direction, and the installation space 111 has two space side edges. The two flow channel side edges and the two space side edges are arranged in a one-to-one correspondence along the first direction. When the width dimension of the heat exchange medium flow channel 21 along the third direction is greater than the width dimension of the installation space 111 along the third direction, along the third direction, the heat exchange medium flow channel 21 has two flow channel side edges, and the installation space 111 has two space side edges, and the two space side edges are located between the two flow channel side edges.

[0077] In the above technical solution, by making the width dimension of the heat exchange medium flow channel 21 along the third direction greater than or equal to the width dimension of the installation space 111 along the third direction, it is beneficial to increase the corresponding area of ​​the heat exchange medium flow channel 21 and the installation space 111 along the first direction, and it is beneficial to make the heat exchange medium flow channel 21 cover the open end of the installation space 111 along the first direction, so that the heat exchange medium flow channel 21 and the installation space 111 are arranged relative to each other along the first direction, further improving the heat transfer efficiency between the heat exchange structure 20 and the battery cell 10, thereby further improving the heat exchange efficiency between the heat exchange structure 20 and the battery cell 10, and more conducive to keeping the battery cell 10 at an appropriate temperature, further extending the service life of the battery cell 10, and further improving the reliability of the battery device 100.

[0078] According to some embodiments of the present application, Figure 7As shown, the heat exchange medium flow channel 21 and the installation space 111 both extend along the second direction, the length of the heat exchange medium flow channel 21 along the second direction is greater than or equal to the length of the installation space 111 along the second direction, and the first direction is perpendicular to the second direction.

[0079] The heat exchange medium flow channel 21 and the installation space 111 both extend along the second direction. As an example, the length of the heat exchange medium flow channel 21 along the second direction can be equal to the length of the installation space 111 along the second direction. As another example, the length of the heat exchange medium flow channel 21 along the second direction is greater than the length of the installation space 111 along the second direction. When the length of the heat exchange medium flow channel 21 along the second direction is equal to the length of the installation space 111 along the second direction, the heat exchange medium flow channel 21 has two flow channel end edges and the installation space 111 has two space end edges along the second direction, and the two flow channel end edges and the two space end edges are arranged in a one-to-one correspondence along the first direction. When the width of the heat exchange medium flow channel 21 along the second direction is greater than the width of the installation space 111 along the second direction, the heat exchange medium flow channel 21 has two flow channel end edges and the installation space 111 has two space end edges along the second direction, and the two space end edges are located between the two flow channel end edges.

[0080] In the above technical solution, by making the length dimension of the heat exchange medium flow channel 21 along the second direction greater than or equal to the length dimension of the installation space 111 along the second direction, it is beneficial to increase the corresponding area of ​​the heat exchange medium flow channel 21 and the installation space 111 along the first direction, and is more conducive to making the heat exchange medium flow channel 21 cover the open end of the installation space 111 along the first direction, and is more convenient for the heat exchange medium flow channel 21 and the installation space 111 to be arranged relative to each other along the first direction, further improving the heat transfer efficiency between the heat exchange structure 20 and the battery cell 10, thereby further improving the heat exchange efficiency between the heat exchange structure 20 and the battery cell 10, and is more conducive to keeping the battery cell 10 at an appropriate temperature, further extending the service life of the battery cell 10, and further improving the reliability of the battery device 100.

[0081] According to some embodiments of the present application, the heat exchange structure 20 is formed with a medium inlet 22 and a medium outlet 23, and the medium inlet 22 and the medium outlet 23 are arranged along the second direction. The heat exchange medium flow channel 21 is connected between the medium inlet 22 and the medium outlet 23 and connects the medium inlet 22 and the medium outlet 23.

[0082] Among them, such as Figure 7As shown, the heat exchange structure 20 is formed with a medium inlet 22 and a medium outlet 23. As an example, the first heat exchange wall 25 is formed with the medium inlet 22 and the medium outlet 23. As another example, the second heat exchange wall 26 is formed with the medium inlet 22 and the medium outlet 23. As another example, the first heat exchange wall 25 is formed with the medium inlet 22, and the second heat exchange wall 26 is formed with the medium outlet 23. As another example, the first heat exchange wall 25 is formed with the medium outlet 23, and the second heat exchange wall 26 is formed with the medium inlet 22. This application is explained by taking the example of the second heat exchange wall 26 forming the medium inlet 22 and the medium outlet 23. The medium inlet 22 and the medium outlet 23 are spaced apart along the second direction, and the medium inlet 22 and the medium outlet 23 can be arranged opposite to each other along the second direction. The medium inlet 22 and the medium outlet 23 can be respectively arranged near the corresponding ends of the heat exchange structure 20. The heat exchange medium flow channel 21 is connected between the medium inlet 22 and the medium outlet 23. It should be noted that part of the heat exchange medium flow channel 21 is connected between the medium inlet 22 and the medium outlet 23, or the entire heat exchange medium flow channel 21 is connected between the medium inlet 22 and the medium outlet 23, and the heat exchange medium flow channel 21 connects the medium inlet 22 and the medium outlet 23.

[0083] In the above technical solution, the medium inlet 22 and the medium outlet 23 are connected through the heat exchange medium flow channel 21, and the heat exchange medium flows into the heat exchange medium flow channel 21 from the medium inlet 22, flows along the heat exchange medium flow channel 21 to the medium outlet 23 and flows out of the heat exchange structure 20 from the medium outlet 23, so that the heat exchange medium can continuously take away the heat generated by the battery cell 10. Since the medium inlet 22 and the medium outlet 23 are relative and spaced apart along the second direction, the heat exchange medium can flow from one end to the other end of the heat exchange structure 20 along the second direction, which is beneficial to increase the flow path of the heat exchange medium in the heat exchange medium flow channel 21, so that the heat exchange medium and the battery cell 10 can fully exchange heat, thereby improving the heat exchange effect of the heat exchange structure 20.

[0084] According to some embodiments of the present application, Figure 3 and Figure 7 As shown, the length dimension of the heat exchange structure 20 along the second direction is greater than the length dimension of the battery cell 10 along the second direction. Along the second direction, both ends of the heat exchange structure 20 are formed with protrusions 24 protruding toward one side of the battery cell 10. The battery cell 10 is located between the protrusions 24 at both ends of the heat exchange structure 20. The protrusions 24 are used to abut and limit the battery cell 10. The first direction and the second direction are perpendicular.

[0085] Among them, such as Figure 3As shown, the length dimension of the heat exchange structure 20 along the second direction is greater than the length dimension of the battery cell 10 along the second direction. Along the second direction, both ends of the heat exchange structure 20 extend beyond the battery cell 10. Along the second direction, both ends of the heat exchange structure 20 are formed with protrusions 24, and the protrusions 24 protrude toward the battery cell 10. As an example, both ends of the heat exchange structure 20 are bent toward the battery cell 10 to form the protrusions 24. As another example, the first heat exchange wall 25 of the heat exchange structure 20 is bent toward the battery cell 10 to form the protrusions 24. As another example, the surface of the first heat exchange wall 25 facing the battery cell 10 has a boss structure, and the boss structure is configured as the protrusion 24. However, the present application is not limited to this, and the specific formation method of the protrusion 24 is not specifically limited, as long as the protrusions 24 are formed at both ends of the heat exchange structure 20. The battery cell 10 is located between the protrusions 24 at both ends of the heat exchange structure 20, part of the structure of the battery cell 10 is located between the protrusions 24 at both ends of the heat exchange structure 20, or the entire structure of the battery cell 10 is located between the protrusions 24 at both ends of the heat exchange structure 20. As an example, the shell 11 can be in contact with the protrusion 24 for positioning. As another example, the protrusion 24 and the battery cell 10 are spaced apart along the second direction, and a gap is formed between the protrusion 24 and the shell 11 of the battery cell 10. The battery cell 10 is deformed, and the protrusion 24 can be in contact with the battery cell 10 for positioning. When the protrusion 24 is in contact with the battery cell 10, the protrusion 24 can limit the battery cell 10, so that the relative position of the battery cell 10 and the heat exchange structure 20 is reliable, reducing the risk of separation between the battery cell 10 and the heat exchange structure 20.

[0086] In the above technical solution, the battery cell 10 is located between the protrusions 24 at both ends of the heat exchange structure 20. When the protrusions 24 are in contact with the battery cell 10, the protrusions 24 can limit the battery cell 10, thereby reducing the risk of the battery cell 10 being offset relative to the heat exchange structure 20, making the relative position of the battery cell 10 and the heat exchange structure 20 reliable, and reducing the risk of separation of the battery cell 10 and the heat exchange structure 20, which is beneficial to improving the assembly reliability of the battery cell 10 and the heat exchange structure 20.

[0087] According to some embodiments of the present application, the shell 11 includes: a partition structure 13, the partition structure 13 is located in the installation space 111 to divide the installation space 111 into multiple independent sub-installation spaces 14, the multiple sub-installation spaces 14 are arranged in a direction perpendicular to the first direction, the battery cell 10 includes multiple electrode assemblies 12, the multiple electrode assemblies 12 are respectively arranged in the multiple sub-installation spaces 14, and the multiple electrode assemblies 12 and the multiple sub-installation spaces 14 correspond one to one.

[0088] Among them, such as Figure 5 and Figure 7As shown, the shell 11 may include: a partition structure 13, the partition structure 13 is arranged in the installation space 111, and the partition structure 13 divides the installation space 111 into a plurality of independent sub-installation spaces 14, adjacent sub-installation spaces 14 are not connected, and each sub-installation space 14 is open at the end facing the heat exchange structure 20. The plurality of sub-installation spaces 14 are arranged in a direction perpendicular to the first direction, which can also be understood as the plurality of sub-installation spaces 14 being arranged along a plane perpendicular to the first direction. As an example, the plurality of sub-installation spaces 14 are arranged in sequence along the second direction. As another example, the plurality of sub-installation spaces 14 are arranged in sequence along the third direction. As another example, part of the plurality of sub-installation spaces 14 are arranged in sequence along the second direction, and another part of the plurality of sub-installation spaces 14 are arranged in sequence along the third direction. This application is explained by taking the plurality of sub-installation spaces 14 arranged in sequence along the second direction as an example. The partition structure 13 may include at least one partition plate 131. According to actual use requirements, the number of partition plates 131 may be one, two, three, four, etc. This application takes the example of three partition plates 131 as an example. Figure 7 As shown, a plurality of partition plates 131 are sequentially spaced apart along the second direction, thereby dividing the installation space 111 into a plurality of sub-installation spaces 14 arranged along the second direction. The battery cell 10 may include a plurality of electrode assemblies 12, with one electrode assembly 12 disposed in each sub-installation space 14.

[0089] In existing technology, each battery cell housing houses an electrode assembly, requiring multiple cells to be stacked and secured. This can lead to uneven contact between cells or loose fixation during the stacking process, resulting in insufficient structural strength for the battery assembly and compromising its stability and reliability. Furthermore, buffer pads are required between adjacent battery cells to isolate them from direct contact and reduce the risk of short circuits or damage from vibration or impact. The use of buffer pads not only increases material costs but also takes up additional space within the battery assembly, impacting its energy density.

[0090] In the above technical solution, the installation space 111 is divided into multiple independent sub-installation spaces 14 by the partition structure 13, and an electrode assembly 12 is provided in each sub-installation space 14, so that multiple electrode assemblies 12 can be provided in a battery cell 10, and the continuous arrangement of the electrode assemblies 12 can be realized. Compared with the existing technology, the effect of multiple battery cells 10 sharing the same shell 11 is achieved, thereby achieving the effect of integrating multiple battery cells 10, eliminating the subsequent complex process of stacking multiple battery cells 10, simplifying the manufacturing difficulty of the battery device 100, and improving the integrity between the multiple battery cells 10, which is beneficial to improving the rigidity and strength of the battery device 100, and is beneficial to improving the stability and reliability of the battery device 100. In addition, multiple battery cells 10 share the same shell 11, and the heat exchange structure 20 can be fixed in the box body 30 by structural adhesive, reducing the risk of structural adhesive overflowing between the large surfaces of two adjacent battery cells 10 ("large surface" refers to the wall surface with a relatively large area in the side wall of the shell 11), reducing the risk of lithium plating in the battery device 100, and thus helping to increase the service life of the battery cells 10. At the same time, it can eliminate the need for buffer pads to be set between adjacent battery cells 10, which can reduce the manufacturing cost of the battery device 100 and improve the space utilization rate in the battery device 100, which is beneficial to improving the energy density of the battery device 100 and also conducive to the lightweight design of the battery device 100.

[0091] According to some embodiments of the present application, Figure 7 As shown, the shell 11 also includes: a shell side wall 112 and an end cover 113. The shell side wall 112 is annular to form a first open end 114 and a second open end 115 that are opposite and spaced apart along a first direction. The first open end 114 is the open end of the installation space 111 facing the heat exchange structure 20. The end cover 113 is located on the side of the shell side wall 112 away from the heat exchange structure 20, and the end cover 113 closes the second open end 115 so that the shell side wall 112 and the end cover 113 jointly define the installation space 111. The partition structure 13 is located in the shell side wall 112.

[0092] Among them, the shell 11 can also include: a shell side wall 112 and an end cover 113, the shell side wall 112 is an annular structure to form a first open end 114 and a second open end 115, the first open end 114 and the second open end 115 are arranged opposite to each other and spaced apart along the first direction, the first open end 114 is located between the second open end 115 and the heat exchange structure 20, the first open end 114 is the open end of the installation space 111 facing the heat exchange structure 20, along the first direction, the end cover 113 is located on the side of the shell side wall 112 away from the heat exchange structure 20, the end cover 113 closes the second open end 115, so that the shell side wall 112 and the end cover 113 can jointly define the installation space 111, the partition structure 13 is arranged in the shell side wall 112, and the end surface of the partition structure 13 away from the heat exchange structure 20 is sealed with the end cover 113, so that the multiple sub-installation spaces 14 are independent of each other and not connected.

[0093] It should be noted that in the existing technical solution, one battery cell is provided with one end cap, that is, one electrode assembly corresponds to one end cap. During the production process of the battery device, each battery cell needs to be welded with an end cap, which affects the production efficiency of the battery device and easily causes quality defects.

[0094] In the present application, a shell 11 includes an end cover 113. The same end cover 113 can enclose multiple sub-installation spaces 14. The end cover 113 can be welded to the shell side wall 112. By enclosing multiple sub-installation spaces 14 with the same end cover 113, the covers of multiple battery cells 10 can be integrated into the end cover 113. During the production process of the battery device 100, the number of welding processes is reduced, and the risk of battery cell sealing failure caused by uneven welding or welding point quality problems is reduced, which is conducive to improving the production efficiency of the battery device 100 and reducing the risk of quality defects, thereby improving the stability and efficiency of production.

[0095] In the above technical solution, by setting the shell side wall 112 and the end cover 113, the shell 11 defines the installation space 111, and by setting the partition structure 13 in the shell side wall 112, the installation space 111 is divided into multiple sub-installation spaces 14, so that the partition structure 13 is reasonably set.

[0096] According to some embodiments of the present application, Figure 7 As shown, the partition structure 13 and the shell side wall 112 are formed in one piece.

[0097] Among them, the shell side wall 112 is an integrally formed part, and the partition structure 13 and the shell side wall 112 are constructed as an integrally formed part. The partition structure 13 and the shell side wall 112 can be integrally extruded by extrusion, or the partition structure 13 and the shell side wall 112 can be integrally cast by casting.

[0098] In the above technical solution, the partition structure 13 and the shell side wall 112 are integrally formed, which can reduce the number of parts constituting the shell 11, improve the production efficiency of the shell 11, and reduce the manufacturing cost of the shell 11, which is beneficial to the large-scale production of the battery device 100 and the improvement of the structural stability of the shell 11. The connection between the shell side wall 112 and the end cover 113 of the integrally formed part is tighter and more uniform, thereby improving the sealing performance of the battery cell 10.

[0099] like Figure 1 As shown, the electrical device according to the embodiment of the present application includes the battery device 100 of the above embodiment. The heat transfer efficiency between the heat exchange structure 20 and the battery cell 10 can be improved, thereby improving the heat exchange efficiency between the heat exchange structure 20 and the battery cell 10, and further improving the reliability of the battery device 100.

[0100] According to some embodiments of the present application, see Figure 3 、 Figure 5 、 Figure 6 and Figure 7As shown, the present application provides a battery device 100, comprising a battery cell 10 and a heat exchange structure 20. There are multiple battery cells 10 and multiple heat exchange structures 20, each of which is arranged in a one-to-one correspondence. The battery cells 10 and the heat exchange structure 20 are arranged along a first direction. The battery cells 10 include a housing 11 and an electrode assembly 12. The housing 11 defines an installation space 111 open to the heat exchange structure 20. The electrode assembly 12 is installed in the installation space 111. The housing 11 is fixed to the heat exchange structure 20, and the heat exchange structure 20 closes the open end of the installation space 111. A heat exchange medium flow channel 21 is formed in the heat exchange structure 20. The heat exchange medium flow channel 21 and the installation space 111 are arranged in a corresponding manner along the first direction. The heat exchange structure 20 is formed with a medium inlet 22 and a medium outlet 23. The medium inlet 22 and the medium outlet 23 are opposite and spaced apart along a second direction. The heat exchange medium flow channel 21 is connected between the medium inlet 22 and the medium outlet 23 and connects the medium inlet 22 and the medium outlet 23. The housing 11 includes a partition structure 13, which is located within the installation space 111 to divide the installation space 111 into a plurality of independent sub-installation spaces 14. The plurality of sub-installation spaces 14 are arranged along a second direction perpendicular to the first direction. The battery cell 10 includes a plurality of electrode assemblies 12, which are respectively disposed within the plurality of sub-installation spaces 14, with a one-to-one correspondence between the plurality of electrode assemblies 12 and the plurality of sub-installation spaces 14. The housing 11 also includes a housing sidewall 112 and an end cap 113. The housing sidewall 112 is annular and defines a first open end 114 and a second open end 115, which are opposed and spaced apart along the first direction. The first open end 114 is the open end of the installation space 111 facing the heat exchange structure 20. The end cap 113 is located on the side of the housing sidewall 112 facing away from the heat exchange structure 20 and closes the second open end 115, so that the housing sidewall 112 and the end cap 113 collectively define the installation space 111. The partition structure 13 is located within the housing sidewall 112. The partition structure 13 and the shell side wall 112 are integrally formed.

[0101] It should be noted that the battery device 100 of the present application, by providing the battery cell 10 and the heat exchange structure 20, cooperates with each other to improve the overall rigidity and heat dissipation efficiency of the battery device 100, providing a strong guarantee for the stable operation of the high-power battery device 100 under complex operating conditions. This not only simplifies the production process and reduces manufacturing costs, but also provides an effective solution for efficient heat dissipation and long-term reliability of the battery device 100. It also provides a solution for the efficient production and large-scale manufacturing of the battery device 100, and has important application value and market prospects.

[0102] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The battery cell 10 can be a solid-state battery cell or a liquid-state battery cell.

[0103] Other components of the battery device 100 according to the embodiment of the present application, such as electrical components and explosion-proof valves, and operations are known to those skilled in the art and will not be described in detail here.

[0104] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0105] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that: include: A battery cell and a heat exchange structure, wherein the battery cell and the heat exchange structure are arranged along a first direction, the battery cell includes a shell and an electrode assembly, the shell defines an installation space open to the heat exchange structure, the electrode assembly is installed in the installation space, the shell is fixed to the heat exchange structure, and the heat exchange structure closes the open end of the installation space.

2. The battery device according to claim 1, wherein: A heat exchange medium flow channel is formed in the heat exchange structure, and the heat exchange medium flow channel and the installation space are opposite to each other along the first direction.

3. The battery device according to claim 2, characterized in that The heat exchange medium flow channel and the installation space both extend along the second direction, the width of the heat exchange medium flow channel along the third direction is greater than or equal to the width of the installation space along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

4. The battery device according to claim 2, wherein: The heat exchange medium flow channel and the installation space both extend along a second direction. The length of the heat exchange medium flow channel along the second direction is greater than or equal to the length of the installation space along the second direction. The first direction is perpendicular to the second direction.

5. The battery device according to claim 2, wherein: The heat exchange structure is formed with a medium inlet and a medium outlet, the medium inlet and the medium outlet are arranged along the second direction, and the heat exchange medium flow channel is connected between the medium inlet and the medium outlet and communicates the medium inlet and the medium outlet.

6. The battery device according to claim 1, wherein: The length dimension of the heat exchange structure along the second direction is greater than the length dimension of the battery cell along the second direction. Along the second direction, both ends of the heat exchange structure are formed with protrusions protruding toward one side of the battery cell. The battery cell is located between the protrusions at both ends of the heat exchange structure. The protrusions are used to abut and limit the battery cell. The first direction and the second direction are perpendicular.

7. The battery device according to any one of claims 1 to 6, characterized in that: The shell includes: a partition structure, which is located in the installation space to divide the installation space into multiple independent sub-installation spaces, and the multiple sub-installation spaces are arranged in a direction perpendicular to the first direction. The battery cell includes a plurality of electrode assemblies, and the plurality of electrode assemblies are respectively arranged in the plurality of sub-installation spaces, and the plurality of electrode assemblies and the plurality of sub-installation spaces correspond one to one.

8. The battery device according to claim 7, characterized in that The shell further includes: a shell side wall and an end cover, the shell side wall is annular to form a first open end and a second open end that are opposite and spaced apart along the first direction, the first open end being the open end of the installation space facing the heat exchange structure, the end cover being located on a side of the shell side wall facing away from the heat exchange structure, and the end cover closing the second open end so that the shell side wall and the end cover jointly define the installation space, and the partition structure is located within the shell side wall.

9. The battery device according to claim 8, characterized in that The partition structure and the shell side wall are integrally formed.

10. An electrical device, characterized in that: Comprising the battery device according to any one of claims 1-9.

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