Battery and electric device

Abstract

The present application provides a battery and an electric device. The battery comprises a battery cell and a heat exchange structure, the heat exchange structure comprises a housing and a phase change structure, the housing is provided with a heat exchange flow channel and an accommodating cavity separated from the heat exchange flow channel, and the phase change structure is located in the accommodating cavity and arranged between the battery cell and the heat exchange flow channel. In embodiments of the present application, the phase change structure is arranged between the battery cell and the heat exchange flow channel, thereby facilitating improvement of the use reliability of the battery. Specifically, in a high-temperature environment, the phase change structure can absorb and store heat from the battery cell in time, and then a heat exchange medium flowing in the heat exchange flow channel can dissipate excess heat from the phase change structure in time, achieving a thermal stability effect, and improving the use reliability of the battery in the high-temperature environment. Moreover, under the condition of a low temperature, part of heat stored in the phase change structure can be absorbed by the battery cell, so that the temperature of the battery cell can be raised, achieving a heat preservation function of the battery in a low-temperature environment.

Description

Batteries and electrical devices CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese patent application No. 202420423667.1, filed on March 5, 2024, entitled “Battery and Electrical Device,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0003] Battery cells are widely used in electronic devices such as mobile phones, laptops, electric bicycles, electric cars, electric airplanes, electric boats, electric toy cars, electric toy boats, electric toy airplanes, and power tools. Battery cells can include nickel-cadmium battery cells, nickel-metal hydride battery cells, lithium-ion battery cells, and secondary alkaline zinc-manganese battery cells.

[0004] However, during the use of the battery, the battery cells inside the battery are easily affected by environmental factors, which may lead to abnormal battery use. Summary of the Invention

[0005] In view of the above problems, the present application provides a battery and an electrical device that can improve the reliability of the battery.

[0006] On the one hand, an embodiment of the present application provides a battery, which includes a battery cell and a heat exchange structure. The heat exchange structure includes a shell and a phase change structure. The shell is provided with a heat exchange channel and a accommodating cavity separated from the heat exchange channel. The phase change structure is located in the accommodating cavity and is arranged between the battery cell and the heat exchange channel.

[0007] In the above solution, the phase change structure is placed between the battery cell and the heat exchange channel, which helps improve the reliability of the battery. Specifically, in a high-temperature environment, the phase change structure can promptly absorb and store the heat in the battery cell. Then, the heat exchange medium flowing in the heat exchange channel can promptly dissipate the excess heat in the phase change structure, playing a thermal stabilization role and improving the reliability of the battery in a high-temperature environment. In low-temperature conditions, some of the heat stored in the phase change structure can be absorbed by the battery cell, thereby increasing the temperature of the battery cell to a certain extent, realizing the battery's heat preservation function in a low-temperature environment, so that the temperature of the battery cell inside the battery can be maintained within a certain range, which helps to improve the battery's applicability and reliability.

[0008] In some embodiments, the housing includes two first walls arranged opposite to each other along a first direction, the heat exchange channel is arranged through the first walls, and the accommodating cavity is located between the two first walls.

[0009] In the above scheme, by providing two first walls and allowing the heat exchange channel to penetrate both first walls, the heat exchange medium can be circulated, thereby improving the heat exchange capacity of the heat exchange structure. Furthermore, the accommodating cavity is located between the two first walls, and the spacing between the two first walls in the first direction determines the size of the accommodating cavity in the first direction. Therefore, by adjusting the distance between the two first walls, the size of the accommodating cavity can be changed to meet the needs of different situations, providing strong flexibility.

[0010] In some embodiments, the housing further includes a second wall sandwiched between the two first walls and connected to the first walls, and the second wall encloses a heat exchange channel.

[0011] In the above solution, the second wall is provided to enclose and form a heat exchange channel, meeting the flow requirements of the heat exchange medium. The second wall also serves to isolate the phase change structure from the heat exchange medium, reducing the risk of contact between the heat exchange medium and the phase change structure, and improving the overall reliability of the heat exchange structure.

[0012] In some embodiments, the first wall includes a wall body and a connecting portion that are connected to each other. The wall body is arranged to surround the connecting portion. The connecting portion protrudes from the side of the wall body toward the second wall in the first direction and is fixedly connected to the second wall. The heat exchange channel is arranged to pass through the connecting portion.

[0013] In the above solution, to facilitate the interconnection between the first and second walls, the connecting portion of the first wall is arranged to protrude from the wall body in the first direction toward the side of the second wall. This helps to reduce the difficulty of alignment and connection between the connecting portion and the second wall, thereby improving the reliability of the connection between the first and second walls. At the same time, a heat exchange flow channel is provided through the connecting portion, allowing the heat exchange medium to exit or enter the heat exchange flow channel through the connecting portion, thereby achieving the circulation of the heat exchange medium and improving the heat exchange capacity of the corresponding heat exchange structure.

[0014] In some embodiments, the shell also includes a third wall arranged on the side of the second wall away from the heat exchange channel. The third wall is connected to the first wall and is at least partially spaced apart from the second wall. The first wall, the second wall and the third wall together enclose a accommodating cavity.

[0015] In the above solution, the housing, by providing the first, second, and third walls, can form a mutually separated and independent accommodating cavity and heat exchange flow channel, resulting in a simple and reliable overall structure. Furthermore, the accommodating cavity enclosed by the first, second, and third walls can be a closed cavity, which can limit the phase change structure within the accommodating cavity, thereby reducing the risk of relative movement of the phase change structure and improving the reliability of the heat exchange structure.

[0016] In some embodiments, the third wall includes a first sub-portion, a second sub-portion arranged on a side of the first sub-portion away from the accommodating cavity, and a reinforcing portion sandwiched between the first sub-portion and the second sub-portion, and the first sub-portion is connected to the first wall.

[0017] In the above solution, by configuring the third wall to include a first sub-section, a second sub-section, and a reinforcement, the reinforcement improves the overall structural strength of the third wall. Furthermore, compared to solutions in which the third wall is a solid plate structure, this helps reduce the weight of the third wall and is more practical.

[0018] In some embodiments, the third wall includes a first surface and a second surface that are opposite to each other. The first surface is used to enclose and form a receiving cavity. The second surface has an arc-shaped structure and protrudes toward the receiving cavity.

[0019] In the above solution, the shape of the second surface of the third wall is adjusted so that the second surface is arc-shaped and protrudes toward the accommodating cavity, that is, the second surface protrudes away from the adjacent battery cells. This design is suitable for cylindrical battery cells, as the second surface can adapt to the outer contour of the battery cells, thereby improving the reliability of the relative positioning of the heat exchange structure and the battery cells, thereby enhancing the heat exchange structure's temperature control effect on the battery cells and improving the reliability of the battery.

[0020] In some embodiments, there are multiple third walls, and the multiple third walls are connected to each other and surround the second wall.

[0021] In the above solution, to achieve adaptability to cylindrical battery cells, the shape of the third wall was adjusted so that the second surface of the third wall includes an arc-shaped structure that adapts to the contours of the battery cell. Furthermore, to enable a single heat exchange structure to simultaneously regulate the temperature of multiple battery cells, the number of third walls is set to multiple, with different third walls corresponding to different battery cells. This allows a single heat exchange structure to simultaneously regulate the temperature of multiple different battery cells, thereby improving heat exchange efficiency.

[0022] In some embodiments, the phase change structure is disposed around and covers the heat exchange channel.

[0023] In the above scheme, by setting the phase change structure around and covering the heat exchange flow channel, the heat exchange medium can achieve heat exchange with the phase change structure at different circumferential positions, so that in a high temperature environment, more heat from the battery cell can be dissipated in time with the help of the heat exchange medium, thereby improving the reliability of the battery in a high temperature environment.

[0024] In some embodiments, the thermal conductivity of the housing is greater than the thermal conductivity of the phase change structure.

[0025] In this solution, because the outer shell has a stronger thermal conductivity than the phase-change structure, in high-temperature environments, the outer shell can quickly and evenly transfer heat from the battery cells to different locations in the phase-change structure. The phase-change structure can then quickly and evenly transfer excess heat to the heat exchange medium through the outer shell, thereby meeting the battery's heat dissipation needs. In low-temperature environments, some of the heat stored in the phase-change structure can be evenly transferred to different locations in the battery cells through the outer shell, thereby achieving a thermal insulation effect for the battery cells, which is highly practical.

[0026] In some embodiments, the battery further includes a first guide plate and a second guide plate spaced apart from each other, with the battery cells and the heat exchange structure disposed between the first and second guide plates. The first guide plate defines a first flow channel, the second guide plate defines a second flow channel, and both ends of the heat exchange channel are connected to the first and second flow channels, respectively.

[0027] In the above solution, the addition of the first and second guide plates allows the heat exchange channel to communicate with the first and second channels, thereby enabling the circulation of the heat exchange medium and helping to improve the heat exchange efficiency of the battery. Furthermore, the first and second guide plates can also limit the position of the battery cells and the heat exchange structure, improving the reliability of the relative position between the heat exchange structure and the battery cells.

[0028] In some embodiments, the first deflector includes a first main body, a first protrusion protruding from the side of the first main body facing the heat exchange structure, and a first communication hole extending through the first protrusion and connected to the first flow channel, wherein the first protrusion is at least partially located within the heat exchange flow channel. And / or, the second deflector includes a second main body, a second protrusion protruding from the side of the second main body facing the heat exchange structure, and a second communication hole extending through the second protrusion and connected to the second flow channel, wherein the second protrusion is at least partially located within the heat exchange flow channel.

[0029] In the above solution, by providing a first protrusion in the first guide plate, the first protrusion is able to penetrate deep into the heat exchange flow channel, and the relative positioning between the first guide plate and the heat exchange structure is achieved through a plug-in connection. This not only meets the requirements for heat exchange medium transfer, but also improves the reliability of the relative position between the first guide plate and the heat exchange structure. Similarly, by providing a second protrusion in the second guide plate, the second protrusion is able to penetrate deep into the heat exchange flow channel, and the relative positioning between the second guide plate and the heat exchange structure is achieved through a plug-in connection. This not only meets the requirements for heat exchange medium transfer, but also improves the reliability of the relative position between the second guide plate and the heat exchange structure.

[0030] In a second aspect, an embodiment of the present application provides an electrical device, which includes a battery in any of the aforementioned embodiments, and the battery is used to provide electrical energy.

[0031] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] FIG1 is a schematic structural diagram of a vehicle provided in an embodiment of the present application;

[0034] FIG2 is a schematic structural diagram of a battery provided in an embodiment of the present application;

[0035] FIG3 is a schematic diagram of an exploded structure of a battery provided in an embodiment of the present application;

[0036] FIG4 is a schematic structural diagram of a heat exchange structure in a battery provided in an embodiment of the present application;

[0037] FIG5 is a schematic cross-sectional view corresponding to FIG4 ;

[0038] FIG6 is a schematic structural diagram of another heat exchange structure in a battery provided in an embodiment of the present application;

[0039] FIG7 is an enlarged structural diagram of area P in FIG6 ;

[0040] FIG8 is a schematic structural diagram of a first guide plate in another battery provided in an embodiment of the present application;

[0041] FIG9 is a schematic structural diagram of a second guide plate in another battery provided in an embodiment of the present application;

[0042] FIG10 is a schematic diagram of a partial cross-sectional structure of another battery provided in an embodiment of the present application.

[0043]

[0044] In the attached figure:

[0045] 1000. Vehicle;

[0046] 100, battery; 200, controller; 300, motor; 400, housing; 401, first housing portion; 500, battery cell; 600, heat exchange structure;

[0047] 10. Housing; 11. Accommodating cavity; 12. Heat exchange channel; 13. First wall; 131. Wall body; 132. Connecting portion; 14. Second wall; 15. Third wall; 151. First sub-portion; 152. Second sub-portion; 153. Reinforcement portion;

[0048] 20. Phase change structure;

[0049] 30. First guide plate; 31. First main body; 32. First protrusion; 33. First communication hole;

[0050] 40. Second guide plate; 41. Second main body; 42. Second protrusion; 43. Second communication hole;

[0051] M1, first surface; M2, second surface;

[0052] X, first direction. DETAILED DESCRIPTION

[0053] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments 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 figure descriptions are intended to cover non-exclusive inclusions.

[0055] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0056] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present 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. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0057] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0058] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0059] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0060] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0061] 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.

[0062] 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.

[0063] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.

[0064] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0065] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are housed in the case.

[0066] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0067] In some embodiments, the battery may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0068] During battery use, different external environments can have varying effects on the battery cells within them. For example, in extremely cold weather, the conductivity and material activity within the battery cells decrease, and the battery cell's hot start speed slows down. In hot weather, if the heat within the battery cells cannot be dissipated in a timely manner, thermal runaway may occur, impairing the battery's normal operation.

[0069] Based on the above technical problems, the present application provides a battery and an electrical device. By adding a phase change structure in the battery, the phase change structure is used to achieve the heat preservation function of the battery cell in a low-temperature environment; in a high-temperature environment, the phase change structure is used to achieve timely absorption of heat and dissipate the heat into the heat exchange medium to achieve timely heat dissipation and improve the reliability of the battery.

[0070] The technical solutions described in the embodiments of the present application are applicable to batteries and electrical devices using batteries, such as mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys and electric tools, etc., among which spacecraft include airplanes, rockets, space shuttles and spacecraft, etc., electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc., and electric tools include metal cutting power tools, grinding power tools, assembly power tools and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers.

[0071] The battery cells described in the embodiments of the present application are not limited to being applicable to the electrical devices described above, but for the sake of simplicity, the following embodiments are described using electric vehicles as an example.

[0072] Please refer to Figure 1, which is a simple schematic diagram of a vehicle 1000 provided in an embodiment of the present application. The vehicle 1000 can be a fuel vehicle, a gas 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. A battery 100 can be provided inside the vehicle 1000. For example, the battery 100 can be provided at the bottom, front or rear of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can be used as an operating power source for the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300. The controller 200 is used to control the battery to power the motor 300, for example. The battery can be used for starting and navigating the vehicle 1000. Of course, the battery 100 can also be used to drive the vehicle 1000, replacing or partially replacing fuel or natural gas to provide drive for the vehicle 1000.

[0073] Next, the structure of the battery 100 will be described in detail with reference to the accompanying drawings. Please refer to Figures 2 to 5. The battery 100 includes a battery cell 500 and a heat exchange structure 600. The heat exchange structure 600 includes a shell 10 and a phase change structure 20. The shell 10 is provided with a heat exchange channel 12 and a accommodating cavity 11 separated from the heat exchange channel 12. The phase change structure 20 is located in the accommodating cavity 11 and is arranged between the battery cell 500 and the heat exchange channel 12.

[0074] The battery cell 500 is the main component of the battery 100 for providing electrical energy. The battery cell 500 can have various shapes. As an example, the battery cell 500 can be a cylindrical battery cell 500, a prismatic battery cell 500, a soft-pack battery cell 500, or a battery cell 500 of another shape. The prismatic battery cell 500 includes a square-cased battery cell 500, a blade-shaped battery cell 500, and a multi-prismatic battery 100. The multi-prismatic battery 100 is, for example, a hexagonal battery 100.

[0075] In the battery 100, there can be one or more battery cells 500. If there are multiple battery cells 500, the multiple battery cells 500 can be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections within the multiple battery cells 500. The multiple battery cells 500 can be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery 100 can be accommodated within the same space. Of course, multiple battery cells 500 can also be first connected in series, in parallel, or in a hybrid connection to form a battery 100 module, and then the multiple battery modules can be connected in series, in parallel, or in a hybrid connection to form a single unit and accommodated within the same space.

[0076] The heat exchange structure 600 is a component in the battery 100 used to regulate the temperature of the battery cell 500. The heat exchange structure 600 can be arranged adjacent to the battery cell 500. Depending on actual needs, the heat exchange structure 600 and the battery cell 500 can be arranged in direct contact, or there can be a certain gap between the heat exchange structure 600 and the battery cell 500.

[0077] The heat exchange structure 600 can be positioned in various ways relative to the battery cells 500. For example, the heat exchange structure 600 can enclose a storage space, and the battery 100 can include multiple battery cells 500, and the multiple battery cells 500 are collectively accommodated within the storage space. Furthermore, the battery 100 can include multiple battery cells 500, and the heat exchange structure 600 can be sandwiched between adjacent battery cells 500. This helps the heat exchange structure 600 regulate the temperature of each battery cell 500, thereby improving the reliability of the battery 100.

[0078] The heat exchange structure 600 includes a shell 10 and a phase change structure 20. The shell 10 is the main component of the heat exchange structure 600 that provides protection and support for the internal structure. The shell 10 is a hollow structure, and a heat exchange channel 12 and a receiving cavity 11 are provided in the shell 10. The heat exchange channel 12 is a channel structure in the heat exchange structure 600 for the movement of the heat exchange medium. The heat exchange medium is a fluid or substance used to transfer heat in the heat exchange structure 600. The heat exchange medium can have multiple phases, for example, the heat exchange medium can be in a liquid structure, or the heat exchange medium can be in a gaseous structure. Optionally, the heat exchange channel 12 can be connected to the external space, so that the heat exchange medium can circulate in the heat exchange structure 600, thereby improving the heat exchange capacity of the heat exchange structure 600.

[0079] The accommodating cavity 11 is used to accommodate a phase change structure 20. Phase change structure 20 includes a phase change material and has the ability to change its physical state within a certain temperature range. For example, when the temperature around phase change structure 20 rises to a certain level, phase change structure 20 undergoes a phase change from solid to liquid. During the melting process, phase change structure 20 absorbs and stores a large amount of latent heat. When the temperature around phase change structure 20 drops to a certain level, the heat stored within phase change structure 20 is dissipated to the outside of phase change structure 20 within a certain temperature range, and phase change structure 20 undergoes a reverse phase change from liquid to solid.

[0080] The accommodating chamber 11 and the heat exchange channel 12 are separated, that is, the accommodating chamber 11 and the heat exchange channel 12 are not connected. The accommodating chamber 11 and the heat exchange channel 12 can have a variety of shapes and structures. For example, in the axial direction of the heat exchange channel 12, the projected outer contour of the heat exchange channel 12 can also be circular, square, or other regular or irregular shapes. Similarly, the projected outer contour of the accommodating chamber 11 can also be circular, square, or other regular or irregular shapes. Furthermore, depending on actual needs, the projected outer contour of the accommodating chamber 11 can be the same as the projected outer contour of the heat exchange channel 12, or the projected outer contour of the accommodating chamber 11 can also be different from the projected outer contour of the heat exchange channel 12.

[0081] In addition, the accommodating chamber 11 and the heat exchange channel 12 can have various positions. For example, the accommodating chamber 11 and the heat exchange channel 12 can be arranged side by side in a single direction or multiple directions, or the accommodating chamber 11 can be arranged to surround the heat exchange channel 12. The accommodating chamber 11 can be a single spatial structure, or it can include multiple sub-cavities that are separated. Similarly, the heat exchange channel 12 can include only one channel structure, or it can include multiple channel structures at the same time.

[0082] On this basis, the embodiment of the present application also sets the phase change structure 20 between the battery cell 500 and the heat exchange channel 12, which helps to improve the reliability of the battery 100. Specifically, in a high temperature environment, the phase change structure 20 can absorb and store the heat in the battery cell 500 in a timely manner, and then the heat exchange medium flowing in the heat exchange channel 12 can dissipate the excess heat in the phase change structure 20 in a timely manner, play a thermal stabilization role, and improve the reliability of the battery 100 in a high temperature environment. In low temperature conditions, part of the heat stored in the phase change structure 20 can be absorbed by the battery cell 500, thereby increasing the temperature of the battery cell 500 to a certain extent, realizing the heat preservation function of the battery 100 in a low temperature environment, so that the temperature of the battery cell 500 inside the battery 100 can be maintained within a certain range, which helps to improve the scope of application and reliability of the battery 100.

[0083] It should be noted that, in addition to the heat exchange structure 600 and the battery cell 500, the battery 100 may also include various other structural components. For example, the battery 100 may also include a box body 400, which is used to accommodate the battery cell 500 and the heat exchange structure 600. The box body 400 may be of various structures. For example, as shown in FIG2 , the box body 400 may include a first box body portion 401 and a second box body portion (not shown in the figure), the first box body portion 401 and the second box body portion cover each other, and the first box body portion 401 and the second box body portion jointly define a receiving portion for accommodating the battery cell 500. Among them, FIG2 and FIG3 show the case where the first box body portion 401 is a hollow structure with one end open. Optionally, the corresponding second box body portion may be a plate-like structure, and the second box body portion covers the open side of the first box body portion 401 to form a box body 400 with a receiving portion. Alternatively, the first box body 401 and the second box body can also be hollow structures with one side open, and the open side of the first box body 401 covers the open side of the second box body to form a box body 400 with a receiving portion. Of course, the first box body 401 and the second box body can be various shapes, such as a cylinder, a cuboid, etc.

[0084] In some embodiments, as shown in FIG. 4 and FIG. 5 , the housing 10 includes two first walls 13 oppositely arranged along a first direction X, the heat exchange channel 12 is arranged through the first walls 13 , and the accommodating cavity 11 is located between the two first walls 13 .

[0085] The housing 10 includes at least two first walls 13, which are arranged opposite to each other in the first direction X. The projected outer contours of the two first walls 13 in the first direction X may be the same, or the projected outer contours of the two first walls 13 in the first direction X may be different.

[0086] The heat exchange channel 12 is set through the first wall 13, so that the heat exchange channel 12 can be connected to the outside, thereby enabling the heat exchange medium to circulate between the inside of the heat exchange structure 600 and the external structure, thereby improving the heat exchange capacity of the corresponding heat exchange junction.

[0087] In the embodiment of the present application, by providing two first walls 13 and allowing the heat exchange channel 12 to penetrate the two first walls 13, the heat exchange medium can be circulated, thereby improving the heat exchange capacity of the heat exchange structure 600. At the same time, the accommodating chamber 11 is located between the two first walls 13. The spacing between the two first walls 13 in the first direction X determines the size of the accommodating chamber 11 in the first direction X. Therefore, by adjusting the distance between the two first walls 13, the size of the accommodating chamber 11 can be changed to meet the needs of different situations, providing strong flexibility.

[0088] In some embodiments, the housing 10 further includes a second wall 14 sandwiched between the two first walls 13 and connected to the first walls 13 , and the second wall 14 encloses and forms the heat exchange channel 12 .

[0089] The housing 10 includes at least a first wall 13 and a second wall 14, wherein the second wall 14 is connected to the first wall 13. The first wall 13 and the second wall 14 can be connected in a variety of ways, for example, the first wall 13 and the second wall 14 can be an integral structure, or the first wall 13 and the second wall 14 can be separate structures and fixed by welding.

[0090] The second wall 14 encloses the heat exchange channel 12, and the radial dimension of the heat exchange channel 12 is determined by the second wall 14. The number of second walls 14 can be one or more. For example, the number of second walls 14 can be one and the second wall 14 can be a hollow cylinder, or the number of second walls 14 can be multiple, with multiple second walls 14 connected end to end to form a hollow structure.

[0091] In the embodiment of the present application, the second wall 14 is provided to enclose the heat exchange channel 12, thereby satisfying the flow requirements of the heat exchange medium. Furthermore, the presence of the second wall 14 also serves to isolate the phase change structure 20 from the heat exchange medium, reducing the risk of contact between the heat exchange medium and the phase change structure 20, thereby improving the overall reliability of the heat exchange structure 600.

[0092] In some embodiments, as shown in Figure 5, the first wall 13 includes a wall body 131 and a connecting portion 132 that are connected to each other. The wall body 131 is arranged to surround the connecting portion 132. The connecting portion 132 protrudes from the side of the wall body 131 toward the second wall 14 in the first direction X, and is connected and fixed to the second wall 14. The heat exchange channel 12 is arranged to pass through the connecting portion 132.

[0093] The first wall 13 includes at least a main wall body 131 and a connecting portion 132. The main wall body 131 is the primary component of the first wall 13, while the connecting portion 132 is the portion of the first wall 13 used for connecting and securing to the second wall 14. The main wall body 131 and the connecting portion 132 are interconnected. Optionally, the two may be integral or separate structures connected and secured by welding or other methods.

[0094] The wall body 131 surrounds the connecting portion 132 and can have a variety of shapes. For example, the projected outer contour of the wall body 131 in the first direction X can be circular, square, or other regular or irregular shapes, and the same applies to the connecting portion 132. Furthermore, depending on actual needs, the contour of the wall body 131 can match or not match the contour of the connecting portion 132.

[0095] In the embodiment of the present application, to facilitate the interconnection between the first wall 13 and the second wall 14, the connecting portion 132 of the first wall 13 is arranged to protrude from the wall body 131 in the first direction X toward the side of the second wall 14. This helps to reduce the difficulty of alignment and connection between the connecting portion 132 and the second wall 14, thereby improving the reliability of the connection between the first wall 13 and the second wall 14. At the same time, the heat exchange channel 12 is provided through the connecting portion 132, allowing the heat exchange medium to leave or enter the heat exchange channel 12 through the connecting portion 132, thereby achieving the circulation of the heat exchange medium and improving the corresponding heat exchange capacity of the heat exchange structure 600.

[0096] It should be noted that the second wall 14 and the connecting portion 132 may be connected in a variety of ways. For example, the second wall 14 and the connecting portion 132 may be abutted against each other in the first direction X and fixedly connected by welding. Alternatively, the connecting portion 132 may be provided with a groove structure, and the second wall 14 and the connecting portion 132 may be plugged and fixed together, thereby also achieving a fixed connection between the second wall 14 and the connecting portion 132.

[0097] Furthermore, depending on actual needs, the side of the connecting portion 132 facing away from the second wall 14 can be flush with the side of the wall body 131 facing away from the second wall 14, or the side of the connecting portion 132 facing away from the second wall 14 can be concave or convex relative to the side of the wall body 131 facing away from the second wall 14. Alternatively, the side of the connecting portion 132 facing away from the second wall 14 can be convex relative to the side of the wall body 131 facing away from the second wall 14, which helps to reduce the difficulty of alignment and connection between the connecting portion 132 and other external structures, thereby improving practicality.

[0098] In some embodiments, the shell 10 also includes a third wall 15 arranged on the side of the second wall 14 away from the heat exchange channel 12. The third wall 15 is connected to the first wall 13 and is at least partially spaced apart from the second wall 14. The first wall 13, the second wall 14 and the third wall 15 together enclose a accommodating cavity 11.

[0099] The shell 10 includes at least a first wall 13, a second wall 14 and a third wall 15, and the third wall 15 is connected to the two first walls 13. The first wall 13 and the third wall 15 can have a variety of connection methods. For example, the first wall 13 and the third wall 15 can be an integral structure, or the first wall 13 and the third wall 15 can be a split structure, and the two are connected and fixed by welding.

[0100] The third wall 15 is disposed on a side of the second wall 14 facing away from the heat exchange channel 12, and at least a portion of the third wall 15 is spaced apart from the second wall 14. There may be one third wall 15, or there may be multiple third walls 15. Alternatively, there may be multiple third walls 15, which are sequentially connected end to end, thereby surrounding the second wall 14.

[0101] The first wall 13, the second wall 14 and the third wall 15 together enclose the accommodating cavity 11, that is, the size of the accommodating cavity 11 is determined by the first wall 13, the second wall 14 and the third wall 15. Furthermore, by controlling the number of third walls 15 and the relative positional relationship between the third wall 15 and the second wall 14, the size and shape of the accommodating cavity 11 can be adjusted. Specifically, for example, the number of third walls 15 can be multiple, and the multiple third walls 15 are spaced apart on the circumference of the second wall 14, and the two ends of each third wall 15 are respectively connected to the second wall 14, so that each third wall 15 can form a closed cavity structure together with the first wall 13 and the second wall 14, so that the accommodating cavity 11 can include multiple independently separated sub-cavity structures to meet the usage needs in different situations.

[0102] In the embodiment of the present application, the housing 10 is provided with a first wall 13, a second wall 14, and a third wall 15 to form a mutually separated and independent accommodating chamber 11 and a heat exchange channel 12, resulting in a simple and reliable overall structure. Furthermore, the accommodating chamber 11 enclosed by the first wall 13, the second wall 14, and the third wall 15 can be a closed cavity, which can limit the phase change structure 20 located within the accommodating chamber 11, thereby reducing the risk of relative movement of the phase change structure 20 and improving the reliability of the heat exchange structure 600.

[0103] In some embodiments, referring to Figures 3, 5 to 7, the third wall 15 includes a first sub-portion 151, a second sub-portion 152 arranged on the side of the first sub-portion 151 facing away from the accommodating cavity 11, and a reinforcing portion 153 sandwiched between the first sub-portion 151 and the second sub-portion 152, and the first sub-portion 151 is connected to the first wall 13.

[0104] The third wall 15 includes at least a first sub-portion 151, a second sub-portion 152 and a reinforcing portion 153. The first sub-portion 151 is a component in the third wall 15 used to enclose and form the accommodating cavity 11. The first sub-portion 151 is connected to the first wall 13, and there can be multiple connection methods between the two. For example, the first sub-portion 151 and the first wall 13 can be connected and fixed by welding or plugging.

[0105] The second sub-section 152 is located on the side of the first sub-section 151 facing away from the accommodating chamber 11. The second sub-section 152 may be the component of the heat exchange structure 600 closest to the battery cell 500. The second sub-section 152 may be disposed in contact with the battery cell 500, or the second sub-section 152 may be disposed spaced apart from the battery cell 500.

[0106] The second sub-section 152 is spaced apart from the first sub-section 151 . Depending on actual needs, the shape and size of the second sub-section 152 can be consistent with or different from those of the first sub-section 151 .

[0107] The reinforcement member is disposed between the first sub-portion 151 and the second sub-portion 152. The reinforcement member is a component having a certain structural strength and can improve the structural strength of the third wall 15. The reinforcement member can have various forms. For example, the reinforcement member can include a plurality of reinforcing ribs, with the plurality of reinforcing ribs being disposed at intervals to improve the structural strength of the third wall 15 at different locations.

[0108] In the embodiment of the present application, by configuring the third wall 15 to include a first sub-portion 151, a second sub-portion 152, and a reinforcement, the reinforcement can be used to improve the overall structural strength of the third wall 15. Furthermore, compared to a solution in which the third wall 15 is a solid plate structure, this helps reduce the weight of the third wall 15 and has greater practicality.

[0109] In some embodiments, as shown in Figures 3 and 5 to 7, the third wall 15 includes a first surface M1 and a second surface M2 relative to each other. The first surface M1 is used to enclose the accommodating cavity 11, and the second surface M2 is an arc-shaped structure and protrudes toward the accommodating cavity 11.

[0110] The first surface M1 and the second surface M2 are two opposing surfaces, wherein the first surface M1 is the surface of the third wall 15 close to the accommodating cavity 11, and the second surface M2 is the surface of the third wall 15 close to the battery cell 500. Taking the third wall 15 as an example, in which the first sub-portion 151 and the second sub-portion 152 are included, the first surface M1 is the surface of the first sub-portion 151 facing away from the second sub-portion 152, and the second surface M2 is the surface of the second sub-portion 152 facing away from the first sub-portion 151.

[0111] In the embodiment of the present application, the shape of the second surface M2 in the third wall 15 is adjusted so that the second surface M2 has an arc-shaped structure and protrudes in the direction close to the accommodating cavity 11, that is, the second surface M2 protrudes in the direction away from the adjacent battery cell 500. This design is suitable for the case where the battery cell 500 is cylindrical in shape. In this way, the second surface M2 can adapt to the outer contour of the battery cell 500, thereby improving the reliability of the relative position between the heat exchange structure 600 and the battery cell 500, thereby improving the temperature control effect of the heat exchange structure 600 on the battery cell 500, and improving the reliability of the battery 100.

[0112] It should be noted that the first surface M1 can have various shapes. Optionally, the shape of the first surface M1 is similar to that of the second surface M2 , that is, the first surface M1 also has an arc-shaped structure and protrudes toward the accommodating cavity 11 .

[0113] In some embodiments, as shown in FIG. 5 and FIG. 6 , there are multiple third walls 15 , and the multiple third walls 15 are connected to each other and are disposed around the second wall 14 .

[0114] In the embodiment of the present application, to achieve adaptability to cylindrical battery cells 500, the shape of the third wall 15 is adjusted so that the second surface M2 of the third wall 15 includes an arc-shaped structure that adapts to the contour of the battery cell 500. Furthermore, to enable a single heat exchange structure 600 to simultaneously regulate the temperature of multiple battery cells 500, the number of third walls 15 is set to multiple, with different third walls 15 corresponding to different battery cells 500. This enables a single heat exchange structure 600 to simultaneously regulate the temperature of multiple different battery cells 500, thereby improving heat exchange efficiency.

[0115] It should be noted that the number of third walls 15 can have various forms. For example, the number of third walls 15 is four, and the four third walls 15 can be arranged corresponding to four different battery cells 500. At this time, the projection of the heat exchange structure 600 in the first direction X can be a cross-shaped structure, and the heat exchange structure 600 is sandwiched between the four battery cells 500.

[0116] In addition, depending on the number of battery cells 500 in the battery 100, the number of heat exchange structures 600 can be one, or the number of heat exchange structures 600 can be multiple. For example, the number of battery cells 500 and the number of heat exchange structures 600 are both multiple, and the multiple battery cells 500 are arranged in an array along the first direction X and the second direction, respectively. The multiple heat exchange structures 600 are arranged in an array along the first direction X and the second direction, respectively, and the first direction X and the second direction are intersecting.

[0117] In some embodiments, the phase change structure 20 is disposed around and covers the heat exchange channel 12 .

[0118] The accommodating cavity 11 can be annular, so that the phase change structure 20 within the accommodating cavity 11 can be disposed around the heat exchange channel 12. The phase change structure 20 is a single, integral structure that completely covers the heat exchange channel 12. Alternatively, the phase change structure 20 can include multiple sub-sections, which are connected end to end, with different sub-sections covering different locations of the heat exchange channel 12, thereby collectively surrounding and covering the heat exchange channel 12.

[0119] In the embodiment of the present application, the phase change structure 20 is arranged to surround and cover the heat exchange channel 12, so that the heat exchange medium can achieve heat exchange with the phase change structure 20 at different circumferential positions, so that in a high temperature environment, more heat from the battery cell 500 can be dissipated in a timely manner with the help of the heat exchange medium, thereby improving the reliability of the battery 100 in a high temperature environment.

[0120] In some embodiments, the thermal conductivity of the housing 10 is greater than the thermal conductivity of the phase change structure 20 .

[0121] Thermal conductivity refers to the amount of heat transferred through a one-square-meter area in one second under stable heat transfer conditions, assuming a one-meter-thick material with a one-degree temperature difference between its two surfaces. Generally, a higher thermal conductivity indicates a stronger heat transfer capability. Therefore, the thermal conductivity of the housing 10 is greater than that of the phase change structure 20, indicating that the housing 10 has a stronger thermal conductivity than the phase change structure 20.

[0122] In the embodiment of the present application, because the housing 10 has a stronger thermal conductivity than the phase change structure 20, in high-temperature environments, the housing 10 can quickly and evenly transfer heat from the battery cells 500 to different locations of the phase change structure 20. The phase change structure 20 can then quickly and evenly transfer excess heat to the heat exchange medium through the housing 10, thereby meeting the heat dissipation needs of the battery 100. In low-temperature environments, some of the heat stored in the phase change structure 20 can be evenly transferred to different locations of the battery cells 500 through the housing 10, thereby achieving a thermal insulation effect for the battery cells 500, which is highly practical.

[0123] In some embodiments, referring to Figures 3, 8, and 10, the battery 100 further includes a first guide plate 30 and a second guide plate 40 spaced apart from each other, with the battery cells 500 and the heat exchange structure 600 disposed between the first guide plate 30 and the second guide plate 40. The first guide plate 30 defines a first flow channel, the second guide plate 40 defines a second flow channel, and both ends of the heat exchange channel 12 are connected to the first flow channel and the second flow channel, respectively.

[0124] Both the first guide plate 30 and the second guide plate 40 can be used to achieve the circulation of the heat exchange medium. The first guide plate 30 is provided with a first flow channel, and the second guide plate 40 is provided with a second flow channel. The first flow channel and the second flow channel are respectively connected to the two ends of the heat exchange channel 12. For example, the port on the heat exchange channel 12 that is connected to the first flow channel is the inlet end, and the port on the heat exchange channel 12 that is connected to the second flow channel is the outlet end. The heat exchange medium enters the heat exchange channel 12 through the first flow channel and leaves the heat exchange channel 12 through the second flow channel after completing the heat exchange with the phase change structure 20.

[0125] Furthermore, the first guide plate 30 and the second guide plate 40 are spaced apart in the first direction X, and the battery cells 500 and the heat exchange structure 600 are sandwiched between the first guide plate 30 and the second guide plate 40. With this design, the first guide plate 30 and the second guide plate 40 can also limit the battery cells 500 and the heat exchange structure 600, thereby improving the reliability of the relative position between the heat exchange structure 600 and the battery cells 500.

[0126] In summary, the embodiment of the present application, by adding the first guide plate 30 and the second guide plate 40, enables the heat exchange channel 12 to communicate with the first and second channels, thereby achieving circulation of the heat exchange medium and helping to improve the heat exchange efficiency of the battery 100. Furthermore, the first guide plate 30 and the second guide plate 40 can also limit the battery cells 500 and the heat exchange structure 600, improving the reliability of the relative position between the heat exchange structure 600 and the battery cells 500.

[0127] In some embodiments, the first guide plate 30 includes a first main body 31, a first protrusion 32 protruding from the side of the first main body 31 facing the heat exchange structure 600, and a first communication hole 33 extending through the first protrusion 32 and communicating with the first flow channel. The first protrusion 32 is at least partially located within the heat exchange flow channel 12. And / or, the second guide plate 40 includes a second main body 41, a second protrusion 42 protruding from the side of the second main body 41 facing the heat exchange structure 600, and a second communication hole 43 extending through the second protrusion 42 and communicating with the second flow channel. The second protrusion 42 is at least partially located within the heat exchange flow channel 12.

[0128] The first guide plate 30 includes at least a first main body 31 and a first protrusion 32. The first main body 31 is the main portion of the first guide plate 30, and the first flow channel can be located within the first main body 31. The first protrusion 32 is connected to the first main body 31 and protrudes relative to the first main body 31 toward the heat exchange structure 600. The first protrusion 32 and the first main body 31 can be connected in various ways, for example, the first main body 31 and the first protrusion 32 can be connected and fixed by welding.

[0129] The first connecting hole 33 is provided through the first protrusion 32 along the first direction X. The first connecting hole 33 is connected to the first flow channel and is used to transfer the heat exchange medium. Specifically, the first protrusion 32 can be inserted into the heat exchange flow channel 12. On this basis, the heat exchange medium in the first flow channel can be transferred into the heat exchange flow channel 12 through the first connecting hole 33 on the first protrusion 32, thereby achieving the transfer of heat exchange medium between the first flow channel and the heat exchange flow channel 12.

[0130] The second guide plate 40 includes at least a second main body 41 and a second protrusion 42. The second main body 41 is the main portion of the second guide plate 40, and the second flow channel can be located within the second main body 41. The second protrusion 42 is connected to the second main body 41 and protrudes relative to the second main body 41 toward the heat exchange structure 600. The second protrusion 42 and the second main body 41 can be connected in various ways, for example, the second main body 41 and the second protrusion 42 can be connected and fixed by welding.

[0131] The second connecting hole 43 is provided through the second protrusion 42 along the first direction X. The second connecting hole 43 is connected to the second flow channel and is used to transfer the heat exchange medium. Specifically, the second protrusion 42 can be inserted into the heat exchange flow channel 12. On this basis, the heat exchange medium in the heat exchange flow channel 12 can be transferred into the second flow channel through the second connecting hole 43, thereby achieving the transfer of the heat exchange medium between the second flow channel and the heat exchange flow channel 12.

[0132] In the embodiment of the present application, by providing a first protrusion 32 in the first guide plate 30, the first protrusion 32 can be deeply inserted into the heat exchange channel 12, and the relative positioning between the first guide plate 30 and the heat exchange structure 600 is achieved through a plug-in connection. This not only meets the requirements for heat exchange medium transfer, but also improves the reliability of the relative position between the first guide plate 30 and the heat exchange structure 600. Similarly, by providing a second protrusion 42 in the second guide plate 40, the second protrusion 42 can be deeply inserted into the heat exchange channel 12, and the relative positioning between the second guide plate 40 and the heat exchange structure 600 is achieved through a plug-in connection. This not only meets the requirements for heat exchange medium transfer, but also improves the reliability of the relative position between the second guide plate 40 and the heat exchange structure 600.

[0133] In a second aspect, an embodiment of the present application provides an electrical device, which includes the battery 100 in any of the aforementioned embodiments, and the battery 100 is used to provide electrical energy.

[0134] It should be noted that the electrical device provided in the embodiment of the present application has the beneficial effects of the battery 100 in any of the aforementioned embodiments. Please refer to the aforementioned description of the beneficial effects of the battery 100 for details, and the embodiment of the present application will not be repeated.

[0135] According to some embodiments of the present application, referring to Figures 3 to 10 , a battery 100 includes a battery cell 500, a heat exchange structure 600, a first guide plate 30, and a second guide plate 40. The heat exchange structure 600 includes a housing 10 and a phase change structure 20. The thermal conductivity of the housing 10 is greater than that of the phase change structure 20. The housing 10 includes a first wall 13, a second wall 14, and a third wall 15. The two first walls 13 are arranged opposite each other in a first direction X. The second wall 14 is located between the two first walls 13 and connected to the first wall 13. The second walls 14 enclose a heat exchange channel 12.

[0136] The first wall 13 includes a wall body 131 and a connecting portion 132 that are connected to each other. The wall body 131 is arranged to surround the connecting portion 132. The connecting portion 132 protrudes from the side of the wall body 131 facing the second wall 14 in the first direction X, and is fixedly connected to the second wall 14. The heat exchange channel 12 is arranged to pass through the connecting portion 132.

[0137] The third wall 15 is disposed on the side of the second wall 14 facing away from the heat exchange channel 12. The third wall 15 is connected to the first wall 13 and is at least partially spaced apart from the second wall 14. The first wall 13, the second wall 14, and the third wall 15 together enclose a housing chamber 11, and the phase change structure 20 is located within the housing chamber 11. The third wall 15 includes a first sub-portion 151, a second sub-portion 152 disposed on the side of the first sub-portion 151 facing away from the housing chamber 11, and a reinforcement portion 153 sandwiched between the first sub-portion 151 and the second sub-portion 152. The first sub-portion 151 is connected to the first wall 13. The third wall 15 has a first surface M1 and a second surface M2 opposite to each other. The first surface M1 is used to enclose the housing chamber 11, and the second surface M2 has an arc-shaped structure and protrudes toward the housing chamber 11.

[0138] The first guide plate 30 is provided with a first flow channel and includes a first main body 31, a first protrusion 32 protruding from the side of the first main body 31 facing the heat exchange structure 600, and a first communication hole 33 extending through the first protrusion 32 and communicating with the first flow channel. The first protrusion 32 is at least partially located within the heat exchange flow channel 12. The second guide plate 40 is provided with a second flow channel and includes a second main body 41, a second protrusion 42 protruding from the side of the second main body 41 facing the heat exchange structure 600, and a second communication hole 43 extending through the second protrusion 42 and communicating with the second flow channel. The second protrusion 42 is at least partially located within the heat exchange flow channel 12.

[0139] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery comprising: Battery cells; The heat exchange structure includes a shell and a phase change structure. The shell is provided with a heat exchange channel and a accommodating cavity separated from the heat exchange channel. The phase change structure is located in the accommodating cavity and is arranged between the battery cell and the heat exchange channel.

2. The battery according to claim 1, wherein The housing includes two first walls arranged opposite to each other along a first direction, the heat exchange channel is arranged through the first walls, and the accommodating cavity is located between the two first walls.

3. The battery according to claim 2, wherein The housing further includes a second wall sandwiched between the two first walls and connected to the first walls, and the first walls enclose the heat exchange channel.

4. The battery according to claim 3, wherein The first wall includes a wall body and a connecting portion protruding from the wall body. The connecting portion is connected and fixed to the second wall in the first direction, and the heat exchange channel is provided through the connecting portion.

5. The battery according to claim 3, wherein The housing further includes a third wall disposed on a side of the second wall away from the heat exchange channel, the third wall being connected to the first wall and spaced apart from the second wall; The first wall, the second wall, and the third wall enclose and form the accommodating cavity.

6. The battery according to claim 5, wherein The third wall includes a first sub-portion, a second sub-portion provided on a side of the first sub-portion away from the accommodating cavity, and a reinforcing portion sandwiched between the first sub-portion and the second sub-portion; The first sub-portion is connected to the first wall.

7. The battery according to claim 5, wherein The third wall includes a first surface and a second surface that are opposite to each other. The first surface is used to enclose the accommodating cavity, and the second surface is an arc-shaped structure and protrudes toward the accommodating cavity.

8. The battery according to claim 7, wherein There are multiple third walls, and the multiple third walls are connected to each other and surround the second wall.

9. The battery according to claim 1, wherein The phase change structure is arranged to surround and cover the heat exchange channel.

10. The heat exchange assembly according to claim 1, wherein: The thermal conductivity of the shell is greater than the thermal conductivity of the phase change structure.

11. The battery according to claim 1, further comprising a first guide plate and a second guide plate arranged at intervals, wherein the battery cell and the heat exchange structure are arranged between the first guide plate and the second guide plate; The first guide plate is provided with a first flow channel, the second guide plate is provided with a second flow channel, and both ends of the heat exchange flow channel are respectively connected to the first flow channel and the second flow channel.

12. The battery according to claim 11, wherein The first guide plate includes a first main body, a first protrusion protruding from the first main body toward the heat exchange structure, and a first communication hole penetrating the first protrusion and communicating with the first flow channel, wherein the first protrusion is at least partially located in the heat exchange flow channel; and / or, The second guide plate includes a second main body, a second protrusion protruding from the second main body toward the heat exchange structure, and a second connecting hole penetrating the second protrusion and connected to the second flow channel. The second protrusion is at least partially located in the heat exchange flow channel.

13. An electrical device comprising the battery according to any one of claims 1 to 12, wherein the battery is used to provide electrical energy.

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