Battery and electric device

Abstract

The utility model provides a battery and a power utilization device, the battery comprises a battery monomer and a heat exchange structure, the heat exchange structure comprises a shell and a phase change structure, the shell is provided with a heat exchange flow channel and a containing cavity separated from the heat exchange flow channel, and the phase change structure is located in the containing cavity and arranged between the battery monomer and the heat exchange flow channel. In the embodiment of the invention, the phase change structure is arranged between the battery monomer and the heat exchange runner, so that the use reliability of the battery is improved. Specifically, in a high-temperature environment, the phase change structure can absorb and store heat in the single batteries in time, and then the heat exchange medium flowing in the heat exchange runner can dissipate redundant heat in the phase change structure in time, so that a heat stabilization effect is achieved, and the use reliability of the batteries in the high-temperature environment is improved. And under the low-temperature condition, part of heat stored in the phase change structure can be absorbed by the battery monomers, so that the temperature of the battery monomers can be increased, and the heat preservation function of the battery in a low-temperature environment is realized.

Description

Technical Field

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

[0002] Battery cells are widely used in electronic devices, such as mobile phones, laptop computers, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and electric tools, etc. Battery cells can include nickel-cadmium battery cells, nickel-hydrogen battery cells, lithium-ion battery cells, and secondary alkaline zinc-manganese battery cells, etc.

[0003] However, during the use of the battery, the battery cells inside the battery are easily affected by environmental factors, which may lead to the risk of abnormal battery use. Utility Model Content

[0004] In view of the above problems, the present application provides a battery and an electrical device, which can improve the reliability of the battery.

[0005] 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.

[0006] In the above scheme, the phase change structure is arranged between the battery cell and the heat exchange flow channel, which helps to improve the reliability of the battery. Specifically, in a high temperature environment, the phase change structure can absorb and store the heat in the battery cell in time, and then the heat exchange medium flowing in the heat exchange flow channel can dissipate the excess heat in the phase change structure in time, play a role in thermal stability, and improve the reliability of the battery in a high temperature environment. In low temperature conditions, part of the heat stored inside 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 heat preservation function of the battery 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 scope of application and reliability of the battery.

[0007] In some embodiments, the housing includes two first walls arranged opposite to each other along a first direction, the heat exchange channel passes through the first walls, and the accommodating cavity is located between the two first walls.

[0008] In the above scheme, by setting two first walls and making the heat exchange flow channel penetrate the two first walls, the circulation of the heat exchange medium can be realized, thereby improving the heat exchange capacity of the heat exchange structure. At the same time, the accommodating cavity is located between the two first walls, and the distance 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 relationship between the two first walls, the size of the accommodating cavity can be changed to meet the use needs in different situations, which has strong flexibility.

[0009] 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.

[0010] In the above scheme, by setting the second wall, the heat exchange flow channel can be enclosed by the second wall to meet the flow requirements of the heat exchange medium. At the same time, the existence of the second wall can also play a role in isolating the phase change structure and the heat exchange medium, reducing the risk of mutual contact between the heat exchange medium and the phase change structure, and improving the overall reliability of the heat exchange structure.

[0011] In some embodiments, the first wall includes a wall body and a connecting portion that are interconnected. The wall body surrounds the connecting portion. The connecting portion protrudes in a first direction from the wall body toward a side of the second wall and is connected and fixed to the second wall. The heat exchange channel runs through the connecting portion.

[0012] In the above scheme, in order to facilitate the mutual connection between the first wall and the second wall, the connection part in the first wall is set to protrude from the wall body in the first direction toward the second wall, which helps to reduce the alignment and connection difficulty between the connection part and the second wall, thereby improving the connection reliability between the first wall and the second wall. At the same time, the heat exchange flow channel is set through the connection part, and the heat exchange medium can leave or enter the heat exchange flow channel from the connection part, thereby realizing the circulation of the heat exchange medium and improving the heat exchange capacity corresponding to the heat exchange structure.

[0013] 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, and the first wall, the second wall and the third wall together enclose a accommodating cavity.

[0014] In the above scheme, the housing can form a mutually separated and independent accommodation cavity and heat exchange flow channel by providing the first wall, the second wall and the third wall, and the overall structure is simple and reliable. At the same time, the accommodation cavity formed by the first wall, the second wall and the third wall can be a closed cavity, which can limit the phase change structure located inside the accommodation cavity, thereby reducing the risk of relative movement of the phase change structure and improving the reliability of the heat exchange structure.

[0015] In some embodiments, the third wall includes a first sub-portion, a second sub-portion disposed 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.

[0016] In the above solution, by configuring the third wall to include the first sub-section, the second sub-section and the reinforcement, the overall structural strength of the third wall can be improved with the reinforcement. Compared with the solution in which the third wall is a solid plate structure, this helps to reduce the weight of the third wall and has strong practicality.

[0017] 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, and the second surface is an arc-shaped structure and protrudes toward a direction close to the receiving cavity.

[0018] In the above solution, the shape of the second surface in the third wall is adjusted so that the second surface is in an arc-shaped structure and protrudes in the direction close to the accommodating cavity, that is, the second surface protrudes in the direction away from the adjacent battery cell. This design is suitable for the case where the battery cell is in a cylindrical shape, so that the second surface can adapt to the outer contour of the battery cell, thereby improving the reliability of the relative position between the heat exchange structure and the battery cells, thereby improving the temperature control effect of the heat exchange structure on the battery cells and improving the reliability of the battery.

[0019] In some embodiments, there are multiple third walls, and the multiple third walls are connected to each other and surround the second wall.

[0020] In the above scheme, in order to achieve the adaptability to cylindrical battery cells, the shape of the third wall is adjusted so that the second surface of the third wall includes an arc-shaped structure that matches the contour of the battery cell. Furthermore, in order to enable a single heat exchange structure to simultaneously adjust the temperature of multiple battery cells, the number of third walls is set to multiple, and different third walls are respectively set corresponding to different battery cells, so that a single heat exchange structure can simultaneously adjust the temperature of multiple different battery cells, thereby improving the heat exchange efficiency.

[0021] In some embodiments, the phase change structure is disposed around and covers the heat exchange channel.

[0022] In the above scheme, by surrounding and enclosing the heat exchange flow channel with the phase change structure, 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.

[0023] In some embodiments, the thermal conductivity of the housing is greater than the thermal conductivity of the phase change structure.

[0024] In the above scheme, since the shell has a stronger thermal conductivity than the phase change structure, in a high temperature environment, the shell can quickly and evenly transfer the heat from the battery cell to different positions of the phase change structure, and then the phase change structure can quickly and evenly transfer the excess heat to the heat exchange medium through the shell, thereby meeting the heat dissipation needs of the battery. In a low temperature environment, part of the heat stored in the phase change structure can be evenly transferred to different positions of the battery cell through the shell, thereby achieving a heat preservation effect on the battery cell, which is highly practical.

[0025] In some embodiments, the battery further comprises a first guide plate and a second guide plate which are arranged at intervals, and 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, and 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.

[0026] In the above scheme, by adding the first guide plate and the second guide plate, the heat exchange channel can be connected with the first channel and the second channel, so as to realize the circulation of the heat exchange medium, which helps to improve the heat exchange efficiency of the battery. In addition, the first guide plate and the second guide plate can also play a role in limiting the battery cells and the heat exchange structure, improving the reliability of the relative position between the heat exchange structure and the battery cells.

[0027] In some embodiments, 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 connecting hole penetrating the first protrusion and connected to the first flow channel, and 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, and the second protrusion is at least partially located in the heat exchange flow channel.

[0028] In the above scheme, by providing a first protrusion in the first guide plate, the first protrusion can be deeply inserted into the heat exchange flow channel, and the relative positioning between the first guide plate and the heat exchange structure is achieved by plug-in connection, which not only meets the needs of 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 can be deeply inserted into the heat exchange flow channel, and the relative positioning between the second guide plate and the heat exchange structure is achieved by plug-in connection, which not only meets the needs of heat exchange medium transfer, but also improves the reliability of the relative position between the second guide plate and the heat exchange structure.

[0029] 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.

[0030] 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

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. 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.

[0032] Figure 1 is a structural schematic diagram of a vehicle provided in an embodiment of the present application;

[0033] Figure 2 is a schematic diagram of the structure of a battery provided in an embodiment of the present application;

[0034] Figure 3 is a schematic diagram of an exploded structure of a battery provided in an embodiment of the present application;

[0035] Figure 4 is a schematic structural diagram of a heat exchange structure in a battery provided in an embodiment of the present application;

[0036] Figure 5 yes Figure 4 The corresponding cross-sectional structure diagram;

[0037] Figure 6 is a structural schematic diagram of another heat exchange structure in a battery provided in an embodiment of the present application;

[0038] Figure 7 yes Figure 6 Schematic diagram of the enlarged structure at the middle area P;

[0039] Figure 8 is a structural schematic diagram of a first guide plate in another battery provided in an embodiment of the present application;

[0040] Fig. 9 is a structural schematic diagram of a second guide plate in another battery provided in an embodiment of the present application;

[0041] Fig.10 This is a schematic diagram of a partial cross-sectional structure of another battery provided in an embodiment of the present application.

[0042] In the attached figure:

[0043] 1000. Vehicles;

[0044] 100, battery; 200, controller; 300, motor; 400, housing; 401, first housing portion; 500, battery cell; 600, heat exchange structure;

[0045] 10. Shell; 11. Accommodating cavity; 12. Heat exchange flow channel; 13. First wall; 131. Wall body; 132. Connecting part; 14. Second wall; 15. Third wall; 151. First sub-part; 152. Second sub-part; 153. Reinforcement part;

[0046] 20. Phase change structure;

[0047] 30. first guide plate; 31. first main body; 32. first protrusion; 33. first communication hole;

[0048] 40. second guide plate; 41. second main body; 42. second protrusion; 43. second communication hole;

[0049] M1, first surface; M2, second surface;

[0050] X, first direction. DETAILED DESCRIPTION

[0051] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field 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" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0053] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0054] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0055] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0056] 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).

[0057] 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. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0058] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0059] 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.

[0060] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0061] 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.

[0062] 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.

[0063] 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 accommodated in the case.

[0064] 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.

[0065] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0066] During the use of the battery, different external environments are likely to have different effects on the battery cells inside the battery. For example, in extremely cold weather, the internal conductivity and material activity of the battery cells will decrease, and the hot start speed of the battery cells will decrease. In hot weather, if the heat inside the battery cells cannot be discharged in time, it will cause thermal runaway problems, which is not conducive to the normal use of the battery.

[0067] 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 absorb heat in time and dissipate the heat into the heat exchange medium to achieve timely heat dissipation and improve the reliability of battery use.

[0068] 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, laptop computers, electric vehicles, electric cars, ships, spacecraft, electric toys and electric tools, etc., wherein spacecrafts include airplanes, rockets, space shuttles and spacecrafts, 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.

[0069] 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 examples.

[0070] See also Figure 1 , Figure 1A simple schematic diagram of a vehicle 1000 provided in an embodiment of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 may be provided inside the vehicle 1000, and specifically, for example, the battery 100 may be provided at the bottom, front or rear of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used, for example, to control the battery to power the motor 300. The battery may be used for starting and navigating the vehicle 1000, and of course, the battery 100 may also be used to drive the vehicle 1000, replacing or partially replacing fuel or natural gas to provide drive for the vehicle 1000.

[0071] Next, the structure of the battery 100 will be described in detail with reference to the accompanying drawings. 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 receiving cavity 11 separated from the heat exchange channel 12. The phase change structure 20 is located in the receiving cavity 11 and is arranged between the battery cell 500 and the heat exchange channel 12.

[0072] The battery cell 500 is a main component of the battery 100 for providing electric energy, and the battery cell 500 can have a variety of 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 other shapes. The prismatic battery cell 500 includes a square-shell 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.

[0073] In the battery 100, there can be one or more battery cells 500. If there are more than one battery cell 500, the multiple battery cells 500 can be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells 500 are both connected in series and in parallel. The multiple battery cells 500 can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cells 500 can be accommodated in the same space. Of course, it is also possible that multiple battery cells 500 are first connected in series, in parallel, or in mixed connection to form a battery 100 module, and then the multiple battery 100 modules are connected in series, in parallel, or in mixed connection to form a whole and accommodated in the same space.

[0074] The heat exchange structure 600 is a component in the battery 100 used to adjust 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.

[0075] There may be a variety of positions between the heat exchange structure 600 and the battery cell 500. For example, the heat exchange structure 600 may be enclosed to form a storage space, and the battery 100 may include multiple battery cells 500, and the multiple battery cells 500 are accommodated together in the storage space. Further optionally, the battery 100 may include multiple battery cells 500, and the heat exchange structure 600 is sandwiched between adjacent battery cells 500, which helps to achieve the heat exchange structure 600 to adjust the temperature of each battery cell 500 and improve the reliability of the battery 100.

[0076] 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 for protecting and supporting 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 for the heat exchange medium to move in the heat exchange structure 600, wherein the heat exchange medium is a fluid or substance used to transfer heat in the heat exchange structure 600, and the heat exchange medium can have a variety of phase forms, for example, the heat exchange medium can be in a liquid structure, or the heat exchange medium can also 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.

[0077] The accommodating cavity 11 is used to accommodate the phase change structure 20, which includes a phase change material. The phase change structure 20 has the ability to change its physical state within a certain temperature range. For example, when the temperature around the phase change structure 20 rises to a certain level, the phase change structure 20 undergoes a phase change from solid to liquid. During the melting process, the phase change structure 20 absorbs and stores a large amount of latent heat, and when the temperature around the phase change structure 20 drops to a certain level, the heat stored inside the phase change structure 20 will be dissipated to the outside of the phase change structure 20 within a certain temperature range, and the phase change structure 20 undergoes a reverse phase change from liquid to solid.

[0078] 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. Among them, the accommodating chamber 11 and the heat exchange channel 12 can have various 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, according to different 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.

[0079] In addition, the accommodating chamber 11 and the heat exchange channel 12 can have a variety of positional forms, for example, the accommodating chamber 11 and the heat exchange channel 12 can be arranged side by side in a single or multiple directions, or the accommodating chamber 11 can also be arranged to surround the heat exchange channel 12. Among them, the accommodating chamber 11 can be a single space structure, or the accommodating chamber 11 can also include a plurality of sub-cavities that are separated and arranged, and similarly, the heat exchange channel 12 can include only one channel structure, or the heat exchange channel 12 can also include multiple channel structures at the same time.

[0080] 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, so as to help 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 role in thermal stability, and improve the reliability of the battery 100 in a high temperature environment. In the case of low temperature, part of the heat stored in the phase change structure 20 can be absorbed by the battery cell 500, so that the temperature of the battery cell 500 can be increased to a certain extent, and the heat preservation function of the battery 100 in a low temperature environment is realized, 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.

[0081] It should be noted that the battery 100 may include various other structural components in addition to the heat exchange structure 600 and the battery cell 500. For example, the battery 100 may also include a box 400, which is used to accommodate the battery cell 500 and the heat exchange structure 600. The box 400 may have various structures. Figure 2 As shown, 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 receiving the battery cell 500. Figure 2 and Figure 3The case where the first box body 401 is a hollow structure with one end open is shown. Optionally, the corresponding second box body can be a plate-like structure, and the second box body covers the open side of the first box body 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 in a variety of shapes, such as a cylinder, a cuboid, etc.

[0082] In some embodiments, Figure 4 and Figure 5 As shown, the housing 10 includes two first walls 13 arranged opposite to each other along a first direction X, the heat exchange channel 12 is arranged to penetrate the first walls 13 , and the accommodating cavity 11 is located between the two first walls 13 .

[0083] The housing 10 includes at least two first walls 13 , which are arranged opposite to each other in the first direction X, wherein 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.

[0084] The heat exchange channel 12 is arranged to penetrate the first wall 13, so that the heat exchange channel 12 can be connected to the outside, thereby enabling the circulation of heat exchange medium inside the heat exchange structure 600 and between the external structures, thereby improving the heat exchange capacity of the corresponding heat exchange junction.

[0085] In the embodiment of the present application, two first walls 13 are provided, and the heat exchange channel 12 is provided through the two first walls 13, so that the circulation of the heat exchange medium can be realized, thereby improving the heat exchange capacity of the heat exchange structure 600. At the same time, the accommodating cavity 11 is located between the two first walls 13, and the spacing between the two first walls 13 in the first direction X determines the size of the accommodating cavity 11 in the first direction X. Therefore, by adjusting the distance relationship between the two first walls 13, the size of the accommodating cavity 11 can be changed to meet the use needs in different situations, which has strong flexibility.

[0086] 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 .

[0087] The housing 10 at least includes a first wall 13 and a second wall 14, and 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 a split structure, and the two are connected and fixed by welding.

[0088] 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 the second wall 14 can be one or more. For example, the number of the second wall 14 can be one and it is a hollow cylinder, or the number of the second wall 14 can be multiple, and the multiple second walls 14 are connected end to end in sequence to form a hollow structure.

[0089] In the embodiment of the present application, by providing the second wall 14, the heat exchange flow channel 12 can be enclosed by the second wall 14 to meet the flow requirements of the heat exchange medium. At the same time, the existence of the second wall 14 can also play a role in isolating the phase change structure 20 and the heat exchange medium, reducing the risk of mutual contact between the heat exchange medium and the phase change structure 20, and improving the overall reliability of the heat exchange structure 600.

[0090] In some embodiments, Figure 5 As shown, 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.

[0091] The first wall 13 at least includes a wall body 131 and a connecting portion 132, wherein the wall body 131 is the main component of the first wall 13, and the connecting portion 132 is a partial structure of the first wall 13 for connecting and fixing with the second wall 14. The wall body 131 and the connecting portion 132 are connected to each other. Optionally, the two may be an integral structure, or the two may be a split structure and connected and fixed by welding or the like.

[0092] The wall body 131 surrounds the connecting portion 132, and the wall body 131 and the connecting portion 132 may have a variety of shapes. For example, the outer contour of the projection of the wall body 131 in the first direction X may be circular, square, or other regular or irregular shapes, and the same is true for the connecting portion 132. Further, according to different actual needs, the contour shape of the wall body 131 may match the contour shape of the connecting portion 132, or may not match.

[0093] In the embodiment of the present application, in order to facilitate the mutual connection between the first wall 13 and the second wall 14, the connection portion 132 in the first wall 13 is set to protrude from the wall body 131 toward the second wall 14 in the first direction X, which helps to reduce the alignment and connection difficulty between the connection portion 132 and the second wall 14, thereby improving the connection reliability between the first wall 13 and the second wall 14. At the same time, the heat exchange channel 12 is set through the connection portion 132, and the heat exchange medium can leave or enter the heat exchange channel 12 from the connection portion 132, thereby realizing the circulation of the heat exchange medium and improving the corresponding heat exchange capacity of the heat exchange structure 600.

[0094] It should be noted that there may be a variety of connection methods between the second wall 14 and the connecting portion 132, for example, the second wall 14 and the connecting portion 132 are abutted against each other in the first direction X and are connected and fixed by welding. Alternatively, a groove structure may be provided on the connecting portion 132, and the second wall 14 and the connecting portion 132 are plugged and fixed, so that the connection and fixation between the second wall 14 and the connecting portion 132 can also be achieved.

[0095] In addition, according to different actual needs, the side of the connecting portion 132 away from the second wall 14 can be arranged flush with the side of the wall body 131 away from the second wall 14, or the side of the connecting portion 132 away from the second wall 14 can also be arranged concave or convex relative to the side of the wall body 131 away from the second wall 14. Optionally, the side of the connecting portion 132 away from the second wall 14 is arranged convex relative to the side of the wall body 131 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.

[0096] 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.

[0097] The shell 10 includes at least a first wall 13, a second wall 14 and a third wall 15, wherein the third wall 15 is connected to the two first walls 13, wherein the first wall 13 and the third wall 15 may have a variety of connection methods, for example, the first wall 13 and the third wall 15 may be an integral structure, or the first wall 13 and the third wall 15 may be a split structure, and the two are connected and fixed by welding.

[0098] The third wall 15 is disposed on a side of the second wall 14 away from the heat exchange flow channel 12, and at least a portion of the structure in the third wall 15 is spaced apart from the second wall 14. There may be one third wall 15, or there may be more than one third wall 15. Optionally, there may be more than one third wall 15, and the multiple third walls 15 are sequentially connected end to end, so as to surround the second wall 14.

[0099] The first wall 13, the second wall 14 and the third wall 15 are enclosed together to form 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 multiple third walls 15 are arranged at intervals 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 use needs in different situations.

[0100] In the embodiment of the present application, the housing 10 can form a mutually separated and independent accommodation chamber 11 and a heat exchange flow channel 12 by providing a first wall 13, a second wall 14 and a third wall 15, and the overall structure is simple and reliable. At the same time, the accommodation chamber 11 formed 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 inside the accommodation 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.

[0101] In some embodiments, see Figure 3 , Figures 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 away from the accommodating cavity 11, and a reinforcing 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.

[0102] The third wall 15 at least includes 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 a variety of 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.

[0103] The second sub-section 152 is located on the side of the first sub-section 151 away from the accommodating chamber 11, and the second sub-section 152 may be the component closest to the battery cell 500 in the heat exchange structure 600. The second sub-section 152 may be arranged in contact with the battery cell 500, or the second sub-section 152 may be arranged at a distance from the battery cell 500.

[0104] 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 may be consistent with or different from those of the first sub-section 151 .

[0105] The reinforcement is disposed between the first sub-portion 151 and the second sub-portion 152. The reinforcement is a component with a certain structural strength. The presence of the reinforcement can improve the structural strength of the third wall 15. The reinforcement can have various forms, for example, the reinforcement can include a plurality of reinforcement ribs, and the plurality of reinforcement ribs are disposed at intervals to improve the structural strength of the third wall 15 at different positions.

[0106] In the embodiment of the present application, the third wall 15 is configured to include a first sub-portion 151, a second sub-portion 152 and a reinforcement member, so that the overall structural strength of the third wall 15 can be improved with the help of the reinforcement member. Compared with the solution in which the third wall 15 is a solid plate structure, this helps to reduce the weight of the third wall 15 and has strong practicality.

[0107] In some embodiments, Figure 3 , Figures 5 to 7 As shown, the third wall 15 includes a first surface M1 and a second surface M2 that are opposite 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 .

[0108] The first surface M1 and the second surface M2 are two opposite surfaces, wherein the first surface M1 is a surface of the third wall 15 close to the accommodation cavity 11, and the second surface M2 is a surface of the third wall 15 close to the battery cell 500. Taking the third wall 15 including the first sub-portion 151 and the second sub-portion 152 as an example, the first surface M1 is a surface of the first sub-portion 151 away from the second sub-portion 152, and the second surface M2 is a surface of the second sub-portion 152 away from the first sub-portion 151.

[0109] 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 is in 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 in a cylindrical shape, so that the second surface M2 can be adapted 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.

[0110] It should be noted that the first surface M1 may have a variety of 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 direction close to the accommodating cavity 11 .

[0111] In some embodiments, Figure 5 and Figure 6 As shown, there are multiple third walls 15 , and the multiple third walls 15 are connected to each other and are arranged to surround the second wall 14 .

[0112] In the embodiment of the present application, in order to achieve the adaptability to the cylindrical battery cell 500, the shape of the third wall 15 is adjusted so that the second surface M2 in the third wall 15 includes an arc-shaped structure that is adapted to the contour of the battery cell 500. Further, in order 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, and different third walls 15 are respectively set corresponding to different battery cells 500, so that a single heat exchange structure 600 can simultaneously regulate the temperature of multiple different battery cells 500, thereby improving the heat exchange efficiency.

[0113] 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.

[0114] In addition, depending on the number of battery cells 500 in the battery 100, the number of heat exchange structures 600 may be one, or the number of heat exchange structures 600 may 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, and 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 intersects with the second direction.

[0115] In some embodiments, the phase change structure 20 is disposed around and covers the heat exchange channel 12 .

[0116] The accommodating cavity 11 may be an annular structure, so that the phase change structure 20 located in the accommodating cavity 11 can be arranged around the heat exchange flow channel 12. The phase change structure 20 is a single integral structure and completely covers the heat exchange flow channel 12. Alternatively, the phase change structure 20 may also include multiple sub-parts, which are connected end to end in sequence, and different sub-parts cover different positions of the heat exchange flow channel 12 respectively, so as to surround and cover the heat exchange flow channel 12 together.

[0117] 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 time with the help of the heat exchange medium, thereby improving the reliability of the battery 100 in a high temperature environment.

[0118] In some embodiments, the thermal conductivity of the housing 10 is greater than the thermal conductivity of the phase change structure 20 .

[0119] Thermal conductivity refers to the amount of heat transferred through an area of ​​1 square meter in 1 second under stable heat transfer conditions, when the temperature difference between the two surfaces of a 1 meter thick material is 1 degree. Generally, the higher the thermal conductivity, the stronger the heat transfer capability of the structure. Therefore, the thermal conductivity of the housing 10 is greater than that of the phase change structure 20, that is, the housing 10 has a stronger thermal conductivity than the phase change structure 20.

[0120] In the embodiment of the present application, since the housing 10 can have a stronger thermal conductivity than the phase change structure 20, in a high temperature environment, the housing 10 can quickly and evenly transfer the heat from the battery cell 500 to different positions of the phase change structure 20, and then the phase change structure 20 can quickly and evenly transfer the excess heat to the heat exchange medium through the housing 10, thereby meeting the heat dissipation needs of the battery 100. In a low temperature environment, part of the heat stored in the phase change structure 20 can be evenly transferred to different positions of the battery cell 500 through the housing 10, thereby achieving a heat preservation effect on the battery cell 500, which has strong practicality.

[0121] In some embodiments, see Figure 3 , Figures 8 to 10 The battery 100 further includes a first guide plate 30 and a second guide plate 40 which are arranged at intervals, and the battery cell 500 and the heat exchange structure 600 are arranged between the first guide plate 30 and the second guide plate 40. The first guide plate 30 is provided with a first flow channel, the second guide plate 40 is provided with a second flow channel, and both ends of the heat exchange flow channel 12 are respectively connected to the first flow channel and the second flow channel.

[0122] The first guide plate 30 and the second guide plate 40 can both be used to realize the circulation of the heat exchange medium, wherein 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, and the first flow channel and the second flow channel are respectively connected to the two ends of the heat exchange flow channel 12. Exemplarily, the port on the heat exchange flow channel 12 that is connected to the first flow channel is the inlet end, and the port on the heat exchange flow channel 12 that is connected to the second flow channel is the outlet end, and the heat exchange medium enters the heat exchange flow channel 12 through the first flow channel, and leaves the heat exchange flow channel 12 from the second flow channel after completing the heat exchange with the phase change structure 20.

[0123] Furthermore, the first guide plate 30 and the second guide plate 40 are spaced apart in the first direction X, and the battery cell 500 and the heat exchange structure 600 are sandwiched between the first guide plate 30 and the second guide plate 40. Under this design, the first guide plate 30 and the second guide plate 40 can also limit the battery cell 500 and the heat exchange structure 600, thereby improving the reliability of the relative position between the heat exchange structure 600 and the battery cell 500.

[0124] In summary, the embodiment of the present application is provided with a first guide plate 30 and a second guide plate 40, so that the heat exchange channel 12 can be connected with the first channel and the second channel, thereby realizing the circulation of the heat exchange medium, which helps to improve the heat exchange efficiency of the battery 100. In addition, the first guide plate 30 and the second guide plate 40 can also limit the battery cell 500 and the heat exchange structure 600, thereby improving the reliability of the relative position between the heat exchange structure 600 and the battery cell 500.

[0125] In some embodiments, the first guide plate 30 includes a first main body 31, a first protrusion 32 protruding from the first main body 31 toward the heat exchange structure 600, and a first connecting hole 33 penetrating the first protrusion 32 and connected to the first flow channel, and the first protrusion 32 is at least partially located in 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 second main body 41 toward the heat exchange structure 600, and a second connecting hole 43 penetrating the second protrusion 42 and connected to the second flow channel, and the second protrusion 42 is at least partially located in the heat exchange flow channel 12.

[0126] The first guide plate 30 at least includes a first main body 31 and a first protrusion 32. The first main body 31 is the main part of the first guide plate 30, and the first flow channel can be located in the first main body 31. The first protrusion 32 is connected to the first main body 31 and is protruded relative to the first main body 31 toward the heat exchange structure 600. There can be multiple connection forms between the first protrusion 32 and the first main body 31, for example, the first main body 31 and the first protrusion 32 can be connected and fixed by welding.

[0127] The first connecting hole 33 is arranged to penetrate the first protrusion 32 along the first direction X. The first connecting hole 33 is connected to the first flow channel. The first connecting hole 33 is used to realize the transfer of 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 to the heat exchange flow channel 12 through the first connecting hole 33 on the first protrusion 32, so as to realize the transfer of the heat exchange medium between the first flow channel and the heat exchange flow channel 12.

[0128] The second guide plate 40 at least includes a second main body 41 and a second protrusion 42, wherein the second main body 41 is the main part of the second guide plate 40, and the second flow channel may be located in the second main body 41. The second protrusion 42 is connected to the second main body 41 and is protruded relative to the second main body 41 toward the heat exchange structure 600, wherein the second protrusion 42 and the second main body 41 may be connected in a variety of ways, for example, the second main body 41 and the second protrusion 42 may be connected and fixed by welding.

[0129] The second connecting hole 43 is arranged to penetrate the second protrusion 42 along the first direction X. The second connecting hole 43 is connected to the second flow channel. The second connecting hole 43 is used to realize the transfer of 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 to the second flow channel through the second connecting hole 43, so as to realize the transfer of the heat exchange medium between the second flow channel and the heat exchange flow channel 12.

[0130] In the embodiment of the present application, by providing the 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 by plug-in connection, which not only meets the needs of 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 the 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 by plug-in connection, which not only meets the needs of 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.

[0131] In a second aspect, an embodiment of the present application provides an electrical device, which includes a battery 100 in any of the aforementioned embodiments, and the battery 100 is used to provide electrical energy.

[0132] 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.

[0133] According to some embodiments of this application, please refer to Figures 3 to 10 The 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 to each other in the first direction X. The second wall 14 is located between the two first walls 13 and connected to the first wall 13. The second wall 14 encloses a heat exchange channel 12.

[0134] The first wall 13 includes a wall body 131 and a connecting portion 132 which are connected to each other. The wall body 131 surrounds the connecting portion 132. The connecting portion 132 protrudes from a side of the wall body 131 toward the second wall 14 in the first direction X and is fixedly connected to the second wall 14. The heat exchange channel 12 passes through the connecting portion 132.

[0135] The third wall 15 is arranged on the side of the second wall 14 away from the heat exchange flow channel 12. The third wall 15 is connected to the first wall 13 and is at least partially spaced from the second wall 14. The first wall 13, the second wall 14 and the third wall 15 together enclose the accommodating cavity 11, and the phase change structure 20 is located in the accommodating cavity 11. 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 away from the accommodating cavity 11, and a reinforcing 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 accommodating cavity 11, and the second surface M2 is an arc-shaped structure and protrudes in the direction close to the accommodating cavity 11.

[0136] 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 first main body 31 toward the heat exchange structure 600, and a first communication hole 33 penetrating the first protrusion 32 and communicating with the first flow channel, and the first protrusion 32 is at least partially located in 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 second main body 41 toward the heat exchange structure 600, and a second communication hole 43 penetrating the second protrusion 42 and communicating with the second flow channel, and the second protrusion 42 is at least partially located in the heat exchange flow channel 12.

[0137] 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 replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate 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, characterized in that: include: Battery cells; The heat exchange structure comprises a shell and a phase change structure. The shell is provided with a heat exchange channel and a receiving cavity separated from the heat exchange channel. The phase change structure is located in the receiving cavity and is arranged between the battery cell and the heat exchange channel.

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

3. The battery according to claim 2, characterized in that 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, characterized in that 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 arranged through the connecting portion.

5. The battery according to claim 3, characterized in that The housing further comprises a third wall disposed on a side of the second wall away from the heat exchange flow 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 the accommodating cavity.

6. The battery according to claim 5, characterized in that The third wall includes a first sub-portion, a second sub-portion disposed 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, characterized in that 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 direction approaching the accommodating cavity.

8. The battery according to claim 7, characterized in that 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, characterized in that The phase change structure is arranged to surround and cover the heat exchange flow channel.

10. The battery according to claim 1, characterized in that The thermal conductivity of the shell is greater than the thermal conductivity of the phase change structure.

11. The battery according to claim 1, characterized in that It also includes a first guide plate and a second guide plate which are arranged at intervals, and 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 two 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, characterized in that 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 connecting hole penetrating the first protrusion and connected to the first flow channel, wherein at least a portion of the first protrusion is 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, and the second protrusion is at least partially located in the heat exchange flow channel.

13. An electrical device, characterized in that: The invention comprises a battery as claimed in any one of claims 1 to 12, wherein the battery is used to provide electrical energy.

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