Battery device, refrigerant heat exchange component and electric device

Abstract

The utility model relates to the technical field of batteries, and provides a battery device, a refrigerant heat exchange component and an electric device, the battery device comprises a battery monomer and a box body, the box body comprises a box body and the refrigerant heat exchange component, and the battery monomer is accommodated in an accommodating cavity of the box body; the refrigerant heat exchange component is connected to the box body, a heat exchange flow channel is formed in the refrigerant heat exchange component, and a concave-convex structure is formed on at least part of the inner wall face of the heat exchange flow channel. According to the battery device provided by the embodiment of the invention, cooling is realized by virtue of heat exchange between the refrigerant heat exchange component and the battery monomers, and the concave-convex structure is formed on at least part of the inner wall surface of the heat exchange runner of the refrigerant heat exchange component, so that when the cooling medium flows through the heat exchange runner, the concave-convex structure can increase the contact area with the cooling medium; therefore, the effective heat exchange area of the refrigerant heat exchange component can be increased, the heat exchange performance of the refrigerant heat exchange component can be improved, and the cooling effect of the refrigerant heat exchange component on the battery monomers is better.

Description

[0001] The application claims priority to the Chinese Patent Application No. 202420907842.4, filed on April 28, 2024, and entitled "Heat exchange device, battery and electric device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The application relates to the technical field of batteries, and particularly provides a battery device, a refrigerant heat exchange component and an electric device. BACKGROUND

[0003] In recent years, new energy vehicles have developed rapidly, and the market share of new energy vehicles is becoming higher and higher. Fast and efficient charging is a problem to be solved in the new energy vehicle industry. Fast charging is a mainstream solution for new energy vehicles to achieve fast energy replenishment. However, in the implementation process, many challenges are encountered. A large amount of heat is generated in the battery monomer during fast charging, which causes the internal temperature of the battery to rise sharply, and thus seriously affects the use performance and service life of the battery.

[0004] In the related art, the battery device mainly uses a cold plate to perform heat exchange and cooling treatment on the internal battery monomer. However, the current cold plate cannot meet the cooling requirements of the battery monomer in the fast charging state. UTILITY MODEL CONTENT

[0005] The purpose of the embodiments of the application is to provide a battery device, a refrigerant heat exchange component and an electric device, which aims to solve the problem that the cold plate in the related art cannot meet the heat dissipation requirements of the battery monomer.

[0006] To achieve the above-mentioned purpose, the technical solutions adopted by the embodiments of the application are as follows:

[0007] In a first aspect, the embodiments of the application provide a battery device, which comprises a battery monomer and a box body. The box body comprises a box body and a refrigerant heat exchange component. The box body is internally formed with an accommodating cavity, and the battery monomer is accommodated in the accommodating cavity. The refrigerant heat exchange component is connected to the box body, and is configured to perform heat exchange with the battery monomer. The refrigerant heat exchange component is provided with a heat exchange flow channel, and a concave-convex structure is formed on at least part of the inner wall surface of the heat exchange flow channel.

[0008] The battery device provided by the embodiments of the application cools and reduces the temperature by heat exchange between the refrigerant heat exchange component and the battery monomer. When the cooling medium flows through the heat exchange flow channel, the concave-convex structure can increase the contact area with the cooling medium, thereby increasing the effective heat exchange area of the refrigerant heat exchange component, and further improving the heat exchange performance of the refrigerant heat exchange component. The cooling and temperature reduction effect of the refrigerant heat exchange component on the battery monomer is more optimal.

[0009] In some embodiments, the refrigerant heat exchange component comprises a first plate body connected to the box body and a second plate body connected to the first plate body on a side away from the box body; the second plate body is recessed to form a channel on a side away from the first plate body, and the first plate body covers the channel to form a heat exchange flow channel; wherein a concave-convex structure is formed on the inner wall surface of the channel; and / or the part of the first plate body covering the channel is formed with a concave-convex structure.

[0010] By adopting the above technical solution, the concave-convex structure can be formed on the inner wall surface of the channel of the second plate body to increase the contact area between the cooling medium and the inner wall surface of the channel; and / or the concave-convex structure can be formed on the part of the first plate body covering the channel to increase the contact area between the cooling medium and the first plate body.

[0011] In some embodiments, the inner wall surface of the channel is in a wave structure; and / or the surface of the part of the first plate body covering the channel is in a wave structure.

[0012] By adopting the above technical solution, the inner wall surface of the channel in a wave structure has a larger surface area than a flat surface, so it has a larger contact area with the cooling medium, and the refrigerant heat exchange component has a larger effective heat exchange area.

[0013] In some embodiments, the refrigerant heat exchange component comprises a middle region and an outer peripheral region arranged around the middle region, and the density of the concave-convex structure formed on the inner wall surface of the heat exchange flow channel in the middle region is greater than the density of the concave-convex structure formed on the inner wall surface of the heat exchange flow channel in the outer peripheral region.

[0014] By adopting the above technical solution, the density of the concave-convex structure formed on the inner wall surface of the heat exchange flow channel in the middle region is greater, i.e. the effective heat exchange area of the middle region is larger, and the middle region has a better heat dissipation effect on the battery monomer than the outer peripheral region. The battery monomer in the middle part of the accommodation cavity has a poorer heat dissipation effect, and the difference in heat dissipation effect between the middle region and the outer peripheral region can effectively improve the consistency of the temperature of the battery monomers accommodated in the box.

[0015] In some embodiments, the concave-convex structure comprises a plurality of convex parts formed on the inner wall surface of the heat exchange flow channel.

[0016] By adopting the above technical solution, by forming a plurality of convex parts on the inner wall surface of the heat exchange flow channel, the plurality of convex parts can be in contact with the cooling medium at the same time, which can effectively increase the contact area with the cooling medium and further increase the effective heat exchange area of the refrigerant heat exchange component.

[0017] In some embodiments, the convex part is a convex point and / or a convex block.

[0018] By adopting the technical scheme, the convex points or convex blocks arranged on the wall surface of the heat exchange runner can increase the contact area with the cooling medium, thereby improving the heat exchange effect of the refrigerant heat exchange component.

[0019] In some embodiments, the concave-convex structure includes a plurality of pits formed on the inner wall surface of the heat exchange runner.

[0020] By adopting the technical scheme, the pits formed on the inner wall surface of the heat exchange runner can increase the contact area with the cooling medium, thereby improving the heat exchange effect of the refrigerant heat exchange component.

[0021] In some embodiments, the concave-convex structure includes a plurality of grooves formed on the inner wall surface of the heat exchange runner.

[0022] By adopting the technical scheme, the grooves formed on the inner wall surface of the heat exchange runner can increase the contact area with the cooling medium, thereby improving the heat exchange effect of the refrigerant heat exchange component.

[0023] In some embodiments, the at least part of the inner wall surface of the heat exchange runner is further provided with a fin structure.

[0024] By adopting the technical scheme, when the cooling medium flows in the heat exchange runner, the fin structure can also be in full contact with the cooling medium, thereby effectively increasing the effective heat exchange area of the refrigerant heat exchange component, and further improving the heat exchange capacity of the refrigerant heat exchange component.

[0025] In some embodiments, the refrigerant heat exchange component is provided with a connecting joint, the connecting joint is communicated with the heat exchange runner, and the connecting joint is configured to introduce phase change material medium into the heat exchange runner.

[0026] By adopting the technical scheme, the phase change material medium is introduced into the heat exchange runner by the connecting joint, and the phase change material medium is gasified to absorb heat in the heat exchange runner to achieve efficient cooling.

[0027] In a second aspect, the embodiments of the present application also provide a refrigerant heat exchange component, the refrigerant heat exchange component is provided with a heat exchange runner, and a concave-convex structure is formed on at least part of the inner wall surface of the heat exchange runner.

[0028] The refrigerant heat exchange component provided by the embodiments of the present application can increase the contact area with the cooling medium when the cooling medium flows through the heat exchange runner, thereby increasing the effective heat exchange area of the refrigerant heat exchange component, and further improving the heat exchange performance of the refrigerant heat exchange component.

[0029] In a third aspect, the embodiments of the present application further provide a power consuming device, which comprises the battery device or the refrigerant heat exchange component as described above, and the battery device is used to provide electric energy.

[0030] The power consuming device provided by the embodiments of the present application comprises the battery device or the refrigerant heat exchange component as described above, and the probability of overheat of the power consuming device is effectively reduced in the case that the heat exchange and heat dissipation effect of the refrigerant heat exchange component is relatively good. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or related description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0032] Figure 1 A structural schematic diagram of a vehicle provided by the embodiments of the present application is shown in the figure;

[0033] Figure 2 An exploded view of a battery device provided by the embodiments of the present application is shown in the figure;

[0034] Figure 3 A disassembled structural schematic diagram of a battery cell provided by the embodiments of the present application is shown in the figure;

[0035] Figure 4 A disassembled structural schematic diagram of a battery device provided by the embodiments of the present application is shown in the figure;

[0036] Figure 5 A disassembled structural schematic diagram of a refrigerant heat exchange component provided by the embodiments of the present application is shown in the figure;

[0037] Figure 6 A schematic diagram of a first kind of concave-convex structure provided on the first plate body and the second plate body is shown in the figure;

[0038] Figure 7 A sectional view of a first kind of concave-convex structure provided on the inner wall of the heat exchange flow channel is shown in the figure;

[0039] Figure 8 A schematic diagram of a second kind of concave-convex structure provided on the first plate body and the second plate body is shown in the figure;

[0040] Figure 9 A sectional view of a second kind of concave-convex structure provided on the inner wall of the heat exchange flow channel is shown in the figure;

[0041] Figure 10A schematic view of a third concave-convex structure provided on the first plate body and the second plate body according to an embodiment of the present application is provided.

[0042] Figure 11 A sectional view of a third concave-convex structure provided on the inner wall of the heat exchange channel according to an embodiment of the present application is provided.

[0043] Figure 12 A front view of the refrigerant heat exchange component according to an embodiment of the present application is provided.

[0044] In the drawings:

[0045] 1000, vehicle;

[0046] 100, battery device; 200, controller; 300, motor;

[0047] 10, box body; 101, accommodating cavity; 11, first box body; 12, second box body; 13, box body proper; 131, frame; 132, top plate; 14, refrigerant heat exchange component; 14a, first plate body; 14b, second plate body; 14b1, channel; 141, heat exchange channel; 1401, middle region; 1402, outer peripheral region; 142, connecting joint; 15, concave-convex structure; 151, convex part; 152, pit; 153, groove;

[0048] 20, battery cell; 21, end cover; 21a, electrode terminal; 22, shell; 23, electrode assembly; 23a, tab. DETAILED DESCRIPTION

[0049] Embodiments of the present application are described in detail below with reference to the accompanying drawings. Examples of the embodiments are shown in the drawings, in which the same or similar components are denoted by the same or similar reference numerals throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and are not to be understood as limiting the present application.

[0050] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0051] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as implying or suggesting relative importance or an indicated number of the technical features indicated. Thus, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0052] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] In recent years, new energy vehicles have made a leap in development, and the market share of new energy vehicles is becoming higher and higher; fast and efficient charging is a problem to be solved in the new energy vehicle industry. Fast charging is a mainstream solution for new energy vehicles to achieve fast charging, and many challenges are encountered in the implementation process. A large amount of heat will be generated in the battery monomer during fast charging, which will cause the internal temperature of the battery to rise sharply, and then seriously affect the use performance and service life of the battery. In the related technology, the battery device mainly uses a cold plate to exchange heat and cool the internal battery monomer, and the cooling medium is introduced into the flow channel of the cold plate, and the cooling medium flows through the flow channel and exchanges heat with the battery monomer in the box body to achieve heat dissipation. However, the current cold plate cannot meet the cooling requirements of the battery monomer in the fast charging state.

[0054] Based on the above considerations, in order to solve the problem that the cold plate in the related technology cannot meet the heat dissipation requirements of the battery monomer, a battery device is designed, which includes a box body, the box body includes a box body and a refrigerant heat exchange component provided with a heat exchange flow channel, by setting a concave-convex structure on the inner wall surface of the heat exchange flow channel, when the cooling medium flows through the heat exchange flow channel, the cooling medium contacts the inner wall surface of the heat exchange flow channel, and the cooling medium also fully contacts the surface of the concave-convex structure provided on the inner wall surface, so as to effectively improve the effective contact area of the cooling medium and the refrigerant heat exchange component, and then improve the heat exchange and cooling capacity of the refrigerant heat exchange component; thus, for the scene where the battery monomer generates a large amount of heat in the fast charging state, the refrigerant heat exchange component can effectively exchange heat and cool the battery monomer, so as to meet the cooling requirements of the battery monomer in the fast charging state.

[0055] The battery cell disclosed by the embodiments of the present application can be used in a power consumption device using a battery device as a power source or a variety of energy storage systems using a battery device as an energy storage element. The power consumption device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric plane toy, and the like, and the spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

[0056] The following embodiments are described by taking a power consumption device of an embodiment of the present application as a vehicle 1000 for example for convenience of description.

[0057] Please refer to Figure 1 , Figure 1 The vehicle 1000 provided by some embodiments of the present application is a structural schematic diagram. The vehicle 1000 can be a fuel car, a gas car, or a new energy car, and the new energy car can be a pure electric car, a hybrid car, or a range extended car. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the working power demand of the vehicle 1000 during starting, navigation, and driving.

[0058] In some embodiments of the present application, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0059] Please refer to Figure 2 , Figure 2 The battery device 100 provided by some embodiments of the present application is an exploded view. The battery device 100 mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells 20 connected in series, parallel, or mixed connection through a busbar component.

[0060] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells 20.

[0061] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing a plurality of battery cells 20 into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 20 with a cable tie.

[0062] In some embodiments, the battery device can be a battery pack, which includes a box 10 and one or more battery cell assemblies accommodated in the box 10.

[0063] As an example, the battery cell assembly can be a battery module, which can be accommodated in the box 10 by fixing the battery module in the box 10.

[0064] As an example, the battery cell assembly can also be accommodated in the box 10 by fixing a plurality of battery cells 20 directly to the box 10.

[0065] As an example, the box 10 can include a first box 11 and a second box 12. The first box 11 and the second box 12 are buckled so that a closed space is formed inside the box 10 to accommodate the battery cell assembly. Here, closed means covered or closed, which can be sealed or unsealed. The first box 11 can be a top cover or a bottom plate.

[0066] As an example, the box 10 can include a top cover, a frame and a bottom plate. The top cover and the bottom plate are connected with the frame respectively, so that a closed space is formed inside the box 10 to accommodate the battery cell assembly.

[0067] In some embodiments, the box 10 can be part of the chassis structure of the vehicle 1000. For example, part of the box 10 can be at least part of the floor of the vehicle 1000, or part of the box 10 can be at least part of the cross beam and the longitudinal beam of the vehicle 1000.

[0068] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery cells 20, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, the spacecraft includes airplanes, rockets, space shuttles and spacecraft, etc.

[0069] In the embodiments of the present application, the battery cell 20 can be a secondary battery, which refers to a battery cell 20 that can be activated by charging after discharging.

[0070] The battery cell 20 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-acid battery, etc. The embodiments of the present application are not limited thereto.

[0071] Please refer to Figure 3 , Figure 3 The exploded structural diagram of the battery cell 20 provided by some embodiments of the present application is shown. The battery cell 20 refers to the smallest unit that constitutes the battery device 100. As shown in Figure 3The battery cell 20 includes an end cover 21, a housing 22, an electrode assembly 23, and other functional components.

[0072] The end cover 21 refers to a component that covers the opening of the housing 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cover 21 can be adapted to the shape of the housing 22 to fit the housing 22. Optionally, the end cover 21 can be made of a material with certain hardness and strength, such as an aluminum alloy, so that the end cover 21 is less likely to deform when subjected to extrusion and collision, allowing the battery cell 20 to have higher structural strength and improved reliability. The end cover 21 can be provided with functional components such as an electrode terminal 21a. The electrode terminal 21a can be used to electrically connect with the electrode assembly 23 for outputting or inputting the electrical energy of the battery cell 20. In some embodiments, the end cover 21 can also be provided with a pressure relief mechanism for relieving the internal pressure of the battery cell 20 when the internal pressure or temperature reaches a threshold value. The material of the end cover 21 can also be various, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating member can also be provided on the inner side of the end cover 21, which can be used to isolate the electrical connection components in the housing 22 from the end cover 21 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0073] The housing 22 is a component for fitting the end cover 21 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the end cover 21 can be independent components, and an opening can be provided on the housing 22, and the end cover 21 is covered on the opening to form the internal environment of the battery cell 20. Without limitation, the end cover 21 and the housing 22 can also be integrated, specifically, the end cover 21 and the housing 22 can form a common connecting surface before other components enter the housing, and when it is necessary to seal the inside of the housing 22, the end cover 21 is covered on the housing 22. The housing 22 can be various shapes and sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the housing 22 can be various, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0074] The electrode assembly 23 is a component in which electrochemical reactions occur in the battery cell 20. One or more electrode assemblies 23 can be contained within the case 22. The electrode assembly 23 is mainly formed by winding or layering a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have portions with active materials that constitute a main body of the electrode assembly 23, and portions without active materials that each constitute a tab 23a. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or at opposite ends of the main body. During charging and discharging of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab 23a connects the electrode terminal 21a to form a current loop.

[0075] According to some embodiments of the present application, with reference to Figures 4 to 6 , the embodiments of the present application provide a battery device 100, comprising a battery cell 20 and a box body 10, the box body 10 comprises a box body proper 13 and a refrigerant heat exchange component 14, the box body proper 13 is formed with a containing cavity 101, and the battery cell 20 is contained in the containing cavity 101; the refrigerant heat exchange component 14 is connected to the box body proper 13, and is configured to exchange heat with the battery cell 20; the refrigerant heat exchange component 14 is provided with a heat exchange flow channel 141, and a concave-convex structure 15 is formed on at least part of the inner wall surface of the heat exchange flow channel 141.

[0076] The box body 10 is used for containing the battery cell 20, and comprises a box body proper 13 and a refrigerant heat exchange component 14; wherein the box body proper 13 can be a semi-closed structure with an opening, so that the refrigerant heat exchange component 14 can be capped at the opening of the box body proper 13 and enclosed to form the containing cavity 101; or the box body proper 13 can also be a closed structure in a hollow form, so that the hollow part of the box body proper 13 is the containing cavity 101, and thus the refrigerant heat exchange component 14 can be connected to one side wall surface of the box body proper 13. Exemplarily, in some embodiments, the box body proper 13 can comprise a frame 131 and a top plate 132, the frame 131 can be formed by a plurality of beam structures connected in sequence and enclosed, and the top plate 132 is capped at one end side of the frame 131; thus, the other end side of the frame 131 is an open structure, and capping the refrigerant heat exchange component 14 at the open side of the frame 131 can form the box body 10.

[0077] The refrigerant heat exchange component 14 is connected to the box body 13, for example, by fasteners (screws, bolts, expansion screws, etc.) or by welding, clamping, bonding, etc. In some embodiments, the battery cells 20 accommodated in the accommodation cavity 101 can be connected to the side surface of the refrigerant heat exchange component 14 facing the accommodation cavity 101 (for example, directly connected or indirectly connected through a heat-conducting medium such as heat-conducting glue), so as to achieve contact and heat conduction with the refrigerant heat exchange component 14. Alternatively, in other embodiments, the battery cells 20 accommodated in the accommodation cavity 101 do not directly contact the refrigerant heat exchange component 14 (for example, connected through a bracket, mounting beam, etc.), and the battery cells 20 can transfer heat to the refrigerant heat exchange component 14 through heat radiation. Optionally, the refrigerant heat exchange component 14 can be, but is not limited to, an aluminum plate, a copper plate, an iron plate, a steel plate, a copper-aluminum composite plate, a steel-aluminum composite plate, or the like.

[0078] The refrigerant heat exchange component 14 is provided with a heat exchange flow channel 141; in some embodiments, the refrigerant heat exchange component 14 can be a liquid cooling plate, and the heat exchange flow channel 141 is used for the flow of a cooling medium, which can be provided by a refrigeration unit, and the cooling medium can be introduced into the heat exchange flow channel 141 from one place of the heat exchange flow channel 141, and the cooling medium is discharged from another place of the heat exchange flow channel 141 after fully flowing in the heat exchange flow channel 141; in this way, during the flow of the cooling medium in the heat exchange flow channel 141, the cooling medium fully contacts the inner wall surface of the heat exchange flow channel 141, and the heat emitted by the battery cells 20 can be conducted to the heat exchange flow channel 141 by the refrigerant heat exchange component 14 and absorbed by the cooling medium and then discharged, so as to achieve the purpose of heat exchange, cooling and heat dissipation. In the present embodiment, the cooling medium can be cooling water, cooling oil, etc.

[0079] In other embodiments, the refrigerant heat exchange component 14 can be a direct cooling plate, and the cooling medium flows in the heat exchange flow channel 141 of the direct cooling plate; in the present embodiment, the cooling medium is also referred to as refrigerant, refrigerant, etc., which is a working fluid used to transfer heat energy and produce refrigeration effect in a temperature regulation system; the main function of the cooling medium is to absorb heat through the change of its physical state (from liquid to gas), and to realize the transfer of heat from one place to another through the phase change process of evaporation, so as to achieve the effect of cooling and achieve the purpose of temperature regulation. In the present embodiment, the cooling medium can be freon, alkane, ammonia, carbon dioxide, difluoromethane, tetrafluoroethane, etc.

[0080] The concave-convex structure 15 is formed on at least part of the inner wall surface of the heat exchange flow channel 141. Optionally, the concave-convex structure 15 can be formed on part of the inner wall surface of the heat exchange flow channel 141, for example, the front section, the middle section, the rear section, etc. of the heat exchange flow channel 141 in the flow direction of the cooling medium. Alternatively, the concave-convex structure 15 is formed on the entire inner wall surface of the heat exchange flow channel 141. The concave-convex structure 15 can be distributed in an array or randomly, etc.

[0081] Optionally, the concave-convex structure 15 refers to the convex structure and / or the concave structure formed on the inner wall surface of the heat exchange flow channel 141, for example, the convex point, the convex block, the concave hole, the concave pit, the channel, etc. It should be understood that by forming the concave-convex structure 15 on the inner wall surface of the heat exchange flow channel 141, the roughness of the inner wall surface of the heat exchange flow channel 141 will be improved, or a plurality of convex structures and / or a plurality of concave structures will be formed on the inner wall surface of the heat exchange flow channel 141. Thus, compared with the smooth inner wall surface, the overall surface area of the rougher inner wall surface of the heat exchange flow channel 141 formed by the concave-convex structure 15 is larger, and when the cooling medium flows through the heat exchange flow channel 141, the effective contact area of the cooling medium with the rough inner wall surface of the heat exchange flow channel 141 is also larger, thereby making the cooling medium have a higher heat exchange efficiency through the refrigerant heat exchange component 14, and the refrigerant heat exchange component 14 has a higher heat absorption and cooling capacity.

[0082] The battery device 100 provided by the embodiments of the present application utilizes the heat exchange between the refrigerant heat exchange component 14 and the battery monomer 20 to achieve cooling and temperature reduction. By forming the concave-convex structure 15 on at least part of the inner wall surface of the heat exchange flow channel 141 of the refrigerant heat exchange component 14, when the cooling medium flows through the heat exchange flow channel 141, the concave-convex structure 15 can improve the contact area with the cooling medium, thereby being able to improve the effective heat exchange area of the refrigerant heat exchange component 14, further being able to improve the heat exchange performance of the refrigerant heat exchange component 14, and the cooling and temperature reduction effect of the refrigerant heat exchange component 14 on the battery monomer 20 is more optimal.

[0083] Please refer to Figures 4 to 7 In some embodiments, the refrigerant heat exchange component 14 includes a first plate body 14a and a second plate body 14b. The first plate body 14a is connected to the box body 13, and the second plate body 14b is connected to the side of the first plate body 14a away from the box body 13. The second plate body 14b is recessed to form a channel 14b1 away from the first plate body 14a, and the first plate body 14a covers the channel 14b1 to form the heat exchange flow channel 141. The inner wall surface of the channel 14b1 is formed with the concave-convex structure 15. Alternatively, the part of the first plate body 14a covering the channel 14b1 is formed with the concave-convex structure 15.

[0084] The first plate body 14a can be, but is not limited to, an aluminum plate, a copper plate, an iron plate, a steel plate, a copper-aluminum composite plate, a steel-aluminum composite plate, or the like. The first plate body 14a is connected to the box body 13. Optionally, the first plate body 14a can be fixedly assembled with the box body 13 by means of fasteners, welding, buckling, or the like.

[0085] The second plate body 14b can be, but is not limited to, an aluminum plate, a copper plate, an iron plate, a steel plate, a copper-aluminum composite plate, a steel-aluminum composite plate, or the like. The second plate body 14b is formed with a channel 14b1. It should be understood that the channel 14b1 can be formed by stamping, rolling, or the like. The channel 14b1 is recessed away from the first plate body 14a. Thus, when the second plate body 14b is connected to the first plate body 14a, the first plate body 14a covers the channel 14b1 of the second plate body 14b to form a heat exchange flow channel 141. The second plate body 14b can be fixedly assembled with the first plate body 14a by welding. For example, the second plate body 14b can be fixedly assembled with the first plate body 14a by brazing.

[0086] The channel 14b1 can be provided with a concave-convex structure 15 on the inner wall surface of the channel. When the first plate body 14a and the second plate body 14b are integrally connected by welding, the first plate body 14a surrounds the channel 14b1 to form the heat exchange flow channel 141. Thus, the concave-convex structure 15 on the inner wall surface of the channel 14b1 is located in the heat exchange flow channel 141. When the cooling medium flows through the heat exchange flow channel 141, the cooling medium fully contacts the inner wall surface of the heat exchange flow channel 141 and the concave-convex structure 15, thereby increasing the effective contact area between the cooling medium and the coolant heat exchange component 14.

[0087] Alternatively, the concave-convex structure 15 can be provided on the part of the first plate body 14a that covers the channel 14b1. When the first plate body 14a and the second plate body 14b are integrally connected by welding, the first plate body 14a surrounds the channel 14b1 to form the heat exchange flow channel 141. Thus, the concave-convex structure 15 on the first plate body 14a is located in the heat exchange flow channel 141. When the cooling medium flows through the heat exchange flow channel 141, the cooling medium fully contacts the inner wall surface of the heat exchange flow channel 141 and the concave-convex structure 15, thereby increasing the effective contact area between the cooling medium and the coolant heat exchange component 14.

[0088] Alternatively, the concave-convex structure 15 can be arranged on the inner wall surface of the groove 14b1 of the second plate body 14b and on the portion of the first plate body 14a covering the groove 14b1, so that the effective contact area between the cooling medium and the refrigerant heat exchange component 14 can be further increased after the heat exchange flow channel 141 is formed, and the heat exchange cooling efficiency of the refrigerant heat exchange component 14 on the battery monomer 20 can be further improved.

[0089] In this way, the concave-convex structure 15 can be arranged on the inner wall surface of the groove 14b1 of the second plate body 14b to increase the contact area between the cooling medium and the inner wall surface of the groove 14b1, and / or the concave-convex structure 15 can be arranged on the portion of the first plate body 14a covering the groove 14b1 to increase the contact area between the cooling medium and the first plate body 14a, so that the effective contact area between the refrigerant heat exchange component 14 and the cooling medium can be effectively increased.

[0090] It should be understood that in other embodiments, the refrigerant heat exchange component 14 includes the first plate body 14a and the second plate body 14b, wherein the groove can also be formed on the first plate body 14a (the structure of the groove formed on the first plate body 14a is not shown in the figure), and is formed by recessing from the side surface of the first plate body 14a away from the cabinet body 13. In this way, the second plate body 14b is connected to the side surface of the first plate body 14a away from the cabinet body 13 and covers the groove to form the heat exchange flow channel 141. Alternatively, the groove can be simultaneously formed by recessing away from the first plate body 14a and the second plate body 14b, so that when the first plate body 14a and the second plate body 14b are connected, the groove on the first plate body 14a and the groove on the second plate body 14b can be combined to form the heat exchange flow channel 141.

[0091] Please refer to Figure 4 , Figure 5 and Figure 10 In some embodiments, the inner wall surface of the groove 14b1 is in a wave structure, and / or the portion of the first plate body 14a covering the groove 14b1 is in a wave structure.

[0092] It should be understood that the inner wall surface of the groove 14b1 is arranged in a wave structure, which can effectively increase the surface area of the inner wall surface of the groove 14b1 compared to the inner wall surface in a flat structure. In this way, when the cooling medium flows through the heat exchange flow channel 141, the total area of the inner wall surface of the heat exchange flow channel 141 combined by the groove 14b1 is larger, and the effective contact area between the cooling medium and the wall surface of the heat exchange flow channel 141 can be increased.

[0093] Alternatively, the first plate body 14a can be used to cover part of the surface of the channel 14b1 and be provided in a wave structure. Compared with the surface of the first plate body 14a in a plane structure, the wave structure can effectively increase the surface area of the first plate body 14a by continuous ups and downs. In this way, when the cooling medium flows through the heat exchange flow channel 141, the total area of the inner wall surface of the heat exchange flow channel 141 enclosed by the first plate body 14a is larger, and the effective contact area of the cooling medium with the inner wall surface of the heat exchange flow channel 141 is increased.

[0094] Alternatively, the inner wall surface of the channel 14b1 and the first plate body 14a used to cover part of the surface of the channel 14b1 can be provided in a wave structure. In this way, the effective contact area of the cooling medium with the inner wall surface of the heat exchange flow channel 141 can be further increased to improve the heat exchange efficiency of the refrigerant heat exchange component 14.

[0095] Please refer to Figure 4 , Figure 5 , Figure 6 and Figure 12 In some embodiments, the refrigerant heat exchange component 14 includes a middle region 1401 and an outer peripheral region 1402 arranged around the middle region 1401. The density of the concave-convex structure 15 provided on the inner wall surface of the heat exchange flow channel 141 in the middle region 1401 is greater than the density of the concave-convex structure 15 provided on the inner wall surface of the heat exchange flow channel 141 in the outer peripheral region 1402.

[0096] The middle region 1401 (such as the region in the dashed box in the middle of Figure 12 ) refers to the part of the refrigerant heat exchange component 14 in which the heat exchange flow channel 141 is formed, and which is located in the center of the refrigerant heat exchange component 14. Correspondingly, the outer peripheral region 1402 (such as the region in the dashed box outside Figure 12 ) refers to the part of the refrigerant heat exchange component 14 in which the heat exchange flow channel 141 is formed, and which is other than the middle region 1401, and which is arranged around the middle region 1401.

[0097] It should be understood that when the refrigerant heat exchange component 14 is connected to the box body 13 and encloses the accommodation cavity 101, the middle region 1401 of the refrigerant heat exchange component 14 corresponds to the central part of the accommodation cavity 101, and the outer peripheral region 1402 of the refrigerant heat exchange component 14 corresponds to the outer peripheral part of the accommodation cavity 101. When the battery monomer 20 is accommodated in the accommodation cavity 101, the heat dissipation path of the battery monomer 20 located in the central part of the accommodation cavity 101 is blocked by the battery monomer 20 located in the outer peripheral part of the accommodation cavity 101. Therefore, the temperature rise of the battery monomer 20 located in the central part of the accommodation cavity 101 is higher, and the temperature rise of the battery monomer 20 located in the outer peripheral part of the accommodation cavity 101 is relatively lower.

[0098] In this way, the density of the concave-convex structure 15 arranged on the inner wall surface of the heat exchange flow channel 141 in the middle region 1401 is greater, that is, the effective heat exchange area of the middle region 1401 is greater, and the middle region 1401 has a better heat dissipation effect on the battery monomer 20 than the outer peripheral region 1402; the battery monomer 20 located in the central part of the accommodating cavity 101 has a poorer heat dissipation effect, and the difference in the heat dissipation effects of the middle region 1401 and the outer peripheral region 1402 can effectively improve the consistency of the temperature of the battery monomers 20 accommodated in the box body 10.

[0099] For reference Figures 5 to 7 In some embodiments, the concave-convex structure 15 includes a plurality of convex portions 151 arranged on the inner wall surface of the heat exchange flow channel 141.

[0100] Optionally, the convex portion 151 includes but is not limited to a point-shaped convex portion 151, a block-shaped convex portion 151, a strip-shaped convex portion 151, and the like. The convex portion 151 can be fixedly arranged on the part of the first plate body 14a covering the channel 14b1 by brazing, soldering, or the like, and / or on the inner wall surface of the channel 14b1 of the second plate body 14b.

[0101] The convex portion 151 can be arranged on part of the inner wall surface of the heat exchange flow channel 141, or the entire inner wall surface of the heat exchange flow channel 141 can be provided with the convex portion 151. For example, in some embodiments, the inner wall surface of the heat exchange flow channel 141 on the refrigerant heat exchange component 14 is covered with the convex portion 151.

[0102] In this way, by arranging a plurality of convex portions 151 on the inner wall surface of the heat exchange flow channel 141, the plurality of convex portions 151 are simultaneously in contact with the cooling medium, which can effectively increase the contact area with the cooling medium and further increase the effective heat exchange area of the refrigerant heat exchange component 14.

[0103] For reference Figures 5 to 7 In some embodiments, the convex portion 151 is a convex point and / or a convex block.

[0104] In this embodiment, the convex portion 151 can be a convex point in the form of a granular particle, such as a round dot-shaped particle, or an irregular particle; or the convex portion 151 can be a convex block in the form of a block, such as a square block, a columnar block, a spherical block, or an irregular block structure.

[0105] Exemplarily, in some embodiments, the protrusions 151 are in the form of protruding points. The protruding points can be formed by the following method: metal slurry is attached to the inner wall of the heat exchange channel 141 by spraying or rolling, and the refrigerant heat exchange component 14 is placed in a brazing furnace to melt the metal particles in the metal slurry. The metal particles melt to form metal droplets uniformly dispersed on the inner wall of the heat exchange channel 141. After the refrigerant heat exchange component 14 cools down, the metal droplets form metal particles and are uniformly attached to the inner wall of the heat exchange channel 141. As shown in Figure 6 and Figure 7 .

[0106] In this way, the protruding points and / or protruding blocks arranged on the wall of the heat exchange channel 141 can increase the contact area with the cooling medium, thereby improving the heat exchange effect of the refrigerant heat exchange component 14.

[0107] Please refer to Figure 5 , Figure 8 and Figure 9 . In some embodiments, the concave-convex structure 15 includes a plurality of concave pits 152 arranged on the inner wall of the heat exchange channel 141.

[0108] It can be understood that the concave pit 152 refers to a regular or irregular pit structure formed on the inner wall of the heat exchange channel 141.

[0109] Exemplarily, in some embodiments, a corrosive substance can be introduced into the heat exchange channel 141 to corrode the inner wall of the entire heat exchange channel 141, so that the inner wall of the heat exchange channel 141 forms irregular corrosion pits 152. In this way, when the cooling medium is introduced into the heat exchange channel 141 for heat exchange and cooling operation, the corrosion pits 152 can effectively increase the effective contact area between the refrigerant heat exchange component 14 and the cooling medium.

[0110] Alternatively, in other embodiments, laser can also be used to etch and form the concave pits 152 on the part of the first plate body 14a covering the channel 14b1 and / or the inner wall of the channel 14b1 of the second plate body 14b, as shown in Figure 8 and Figure 9 . The concave pits formed by laser etching can also effectively increase the effective contact area between the refrigerant heat exchange component 14 and the cooling medium.

[0111] In this way, by arranging the concave pits 152 on the inner wall of the heat exchange channel 141, the concave pits 152 can increase the contact area with the cooling medium, thereby improving the heat exchange effect of the refrigerant heat exchange component 14.

[0112] Please refer to Figure 5 , Figure 10 and Figure 11In some embodiments, the concave-convex structure 15 comprises a plurality of grooves 153 arranged on the inner wall surface of the heat exchange channel 141.

[0113] It can be understood that the groove 153 refers to a long strip-shaped groove structure formed on the inner wall surface of the heat exchange channel 141.

[0114] For example, in some embodiments, the first plate body 14a can be rolled by a roller with a convex rib to form the groove 153 on the part of the surface of the channel 14b1, as shown in Figure 11 Thus, when the cooling medium is introduced into the heat exchange channel 141 for heat exchange cooling operation, the cooling medium can also flow in the groove 153 and fully contact the groove surface, thereby effectively increasing the effective contact area of the coolant heat exchange component 14 and the cooling medium.

[0115] Alternatively, in other embodiments, the convex rib can be designed on the stamping die during the process of stamping the channel 14b1 on the second plate body 14b, so that the groove 153 is simultaneously stamped on the inner wall surface of the channel 14b1 when the channel 14b1 is stamped on the second plate body 14b.

[0116] In this way, by arranging the groove 153 on the inner wall surface of the heat exchange channel 141, the contact area with the cooling medium is increased by the groove 153, thereby improving the heat exchange effect of the coolant heat exchange component 14.

[0117] Please refer to Figure 4 and Figure 5 In some embodiments, the inner wall surface of at least part of the heat exchange channel 141 is also provided with a fin structure (not shown in the figure).

[0118] Optionally, the fin structure includes but is not limited to metal plates, metal blocks and the like. The number of fin structures can be one or more than one. The fin structure can be fixedly assembled on the inner wall surface of the channel by welding or the like.

[0119] In this way, by arranging the fin structure, when the cooling medium flows in the heat exchange channel 141, the fin structure can also fully contact the cooling medium, thereby effectively increasing the effective heat exchange area of the coolant heat exchange component 14, and further improving the heat exchange capacity of the coolant heat exchange component 14.

[0120] Please refer to Figures 4 to 6 In some embodiments, the coolant heat exchange component 14 is provided with a connecting joint 142, the connecting joint 142 communicates with the heat exchange channel 141, and the connecting joint 142 is configured to introduce phase change material medium into the heat exchange channel 141.

[0121] The connecting joint 142 is arranged on the refrigerant heat exchange component 14. Optionally, the connecting joint 142 can be fixedly assembled on the refrigerant heat exchange component 14 through a welding (e.g., brazing) process and is in communication with the heat exchange flow channel 141 arranged in the refrigerant heat exchange component 14, so that the cooling medium can be introduced into the heat exchange flow channel 141 through the connecting joint 142. In some embodiments, the connecting joint 142 can also be connected with a compressor outside the battery device 100 through a pipeline (e.g., when the battery device 100 is applied to a vehicle, the compressor in the air conditioning system of the vehicle can be used to provide the phase change material medium to the connecting joint 142), and the compressor can provide the compressed phase change material medium to the connecting joint 142, so that the compressed high-pressure phase change material medium is vaporized in the heat exchange flow channel 141 to absorb a large amount of heat.

[0122] In this embodiment, the cooling medium can be a phase change material medium; it should be understood that the phase change material medium can be, but is not limited to, freon, alkane, ammonia, carbon dioxide, difluoromethane, tetrafluoroethane, etc. The phase change material medium is vaporized in the heat exchange flow channel 141 of the refrigerant heat exchange component 14 to absorb heat, thereby achieving the effect of efficiently cooling the battery device 100.

[0123] It should be understood that when the phase change material medium is introduced into the heat exchange flow channel 141, the part of the phase change material medium close to the inner wall surface of the heat exchange flow channel 141 will quickly absorb the heat emitted by the battery monomer 20, thereby causing the phase change material medium to quickly vaporize along the inner wall surface of the heat exchange flow channel 141 to form a gas film. Specifically, the inner side wall of the first plate body 14a and the inner side wall of the second plate body 14b can both form a gas film; the gas film will cover the inner side wall of the heat exchange flow channel 141 and hinder other liquid phase change material medium from fully contacting the inner wall surface of the heat exchange flow channel 141, thereby affecting the heat dissipation efficiency of the battery monomer 20. By arranging the concave-convex structure 15 on the inner wall surface of the heat exchange flow channel 141, the concave-convex structure 15 can interfere with the normal flow of the phase change material medium in the heat exchange flow channel 141 and form a turbulent flow effect. In this way, when the phase change material medium quickly vaporizes along the inner wall surface of the heat exchange flow channel 141 to absorb heat, the probability of forming a gas film covering the inner wall surface is smaller under the action of the turbulent flow, so that the phase change material medium can fully contact the inner wall surface of the heat exchange flow channel 141, the actual contact area between the phase change material medium and the inner wall surface of the heat exchange flow channel 141 is improved, and the actual contact area between the phase change material medium and the inner wall surface of the heat exchange flow channel 141 is further improved in the environment provided with the concave-convex structure 15, thereby effectively improving the heat dissipation and cooling efficiency of the refrigerant heat exchange component 14 on the battery monomer 20.

[0124] In this way, the phase change material medium is introduced into the heat exchange flow channel 141 through the connecting joint 142, and the phase change material medium is vaporized in the heat exchange flow channel 141 to absorb heat, thereby achieving efficient cooling.

[0125] In the following, the battery device 100 provided by the present application will be further described according to specific embodiments.

[0126] Please refer to Figures 4 to 11 In the present embodiment, the battery device 100 comprises the battery cell 20 and the box body 10, the box body 10 comprises the box body 13 and the refrigerant heat exchange component 14, the refrigerant heat exchange component 14 is connected to the box body 13 and encloses the containing cavity 101, the battery cell 20 is contained in the containing cavity 101; the refrigerant heat exchange component 14 is provided with the heat exchange flow channel 141, and the at least partial inner wall surface of the heat exchange flow channel 141 is formed with the concave-convex structure 15. The concave-convex structure 15 can comprise the convex part 151, which can be metal particles attached to the inner wall surface of the heat exchange flow channel 141. Alternatively, the concave-convex structure 15 can comprise the concave pit 152, which can be an irregular pit structure formed by introducing a corrosive substance into the heat exchange flow channel 141 for corrosion, or the concave pit 152 can also be a pit structure formed by etching the corresponding positions of the first plate body 14a and the second plate body 14b by laser. Alternatively, the concave pit 152 structure can also comprise the groove 153, which is formed by rolling the first plate body 14a by a roller with a convex rib, or is formed by stamping the second plate body 14b to form the groove 14b1, and then stamping the groove 153 on the groove wall surface of the groove 14b1.

[0127] Please refer to Figures 4 to 6 In the second aspect, the present application further provides a refrigerant heat exchange component 14, which is provided with the heat exchange flow channel 141, and the at least partial inner wall surface of the heat exchange flow channel 141 is formed with the concave-convex structure 15.

[0128] The refrigerant heat exchange component 14 provided by the present application forms the concave-convex structure 15 on the at least partial inner wall surface of the heat exchange flow channel 141, which can increase the contact area with the cooling medium when the cooling medium flows through the heat exchange flow channel 141, thereby increasing the effective heat exchange area of the refrigerant heat exchange component 14, and further improving the heat exchange performance of the refrigerant heat exchange component 14.

[0129] Please refer to Figures 1 to 3 In the third aspect, the present application further provides a power consumption device, which comprises the battery device 100 as described above or the refrigerant heat exchange component 14 as described above, and the battery device 100 is used to provide electric energy.

[0130] The power consumption device provided by the present application, for example, the vehicle 1000 as described above, comprises the battery device 100 as described above, and the probability of overheating of the power consumption device can be effectively reduced when the heat exchange and heat dissipation effect of the refrigerant heat exchange component 14 is relatively good.

[0131] The above merely provides the preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, and improvement made in the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include Battery cells; and The housing includes a housing body and a refrigerant heat exchange component. A receiving cavity is formed within the housing body, and the battery cell is housed within the receiving cavity. The refrigerant heat exchange component is connected to the housing body and configured to exchange heat with the battery cell. A heat exchange channel is provided on the refrigerant heat exchange component, and at least a portion of the inner wall surface of the heat exchange channel has an uneven structure.

2. The battery device according to claim 1, characterized in that: The refrigerant heat exchange component includes a first plate and a second plate. The first plate is connected to the housing body, and the second plate is connected to the side of the first plate facing away from the housing body. The second plate is recessed to form a channel facing away from the first plate, and the first plate covers the channel to form the heat exchange channel. The groove has the convex-concave structure formed on its inner wall surface; and / or the portion of the first plate used to cover the groove has the convex-concave structure.

3. The battery device according to claim 2, characterized in that: The inner wall of the channel has a wave-like structure; and / or, the first plate used to cover part of the surface of the channel has a wave-like structure.

4. The battery device according to any one of claims 1 to 3, characterized in that: The refrigerant heat exchange component includes a central region and an outer peripheral region surrounding the central region. The density of the uneven structure formed on the inner wall surface of the heat exchange channel in the central region is greater than the density of the uneven structure formed on the inner wall surface of the heat exchange channel in the outer peripheral region.

5. The battery device according to any one of claims 1 to 4, characterized in that: The concave-convex structure includes a plurality of protrusions disposed on the inner wall surface of the heat exchange channel.

6. The battery device according to claim 5, characterized in that: The protrusion is a protrusion point and / or a protrusion block.

7. The battery device according to any one of claims 1 to 6, characterized in that: The uneven structure includes multiple pits formed on the inner wall surface of the heat exchange channel.

8. The battery device according to any one of claims 1 to 7, characterized in that: The convex-concave structure includes a plurality of grooves formed on the inner wall surface of the heat exchange channel.

9. The battery device according to any one of claims 1 to 8, characterized in that: At least a portion of the inner wall surface of the heat exchange channel is also provided with a fin structure.

10. The battery device according to any one of claims 1 to 9, characterized in that: The refrigerant heat exchange component is provided with a connecting joint, which is connected to the heat exchange channel and is configured to introduce a phase change material medium into the heat exchange channel.

11. A refrigerant heat exchange component, characterized in that: The refrigerant heat exchange component is provided with a heat exchange channel, and at least a portion of the inner wall surface of the heat exchange channel has an uneven structure.

12. An electrical device, characterized in that: Includes a battery device as described in any one of claims 1 to 10 or a refrigerant heat exchange component as described in claim 11, wherein the battery device is used to provide electrical energy.

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