Battery device, refrigerant heat exchange assembly and electric device

Abstract

The utility model is suitable for the technical field of batteries, and provides a battery device, a refrigerant heat exchange assembly and an electric device. The battery monomers are accommodated in the box body; the refrigerant heat exchange assembly is used for exchanging heat with the single batteries, the refrigerant heat exchange assembly comprises a flow channel structure and a temperature equalizing structure, the flow channel structure is used for circulating a first heat exchange medium so as to exchange heat with the single batteries, and the temperature equalizing structure is adjacent to the flow channel structure and used for exchanging heat with the flow channel structure. According to the battery device provided by the embodiment of the invention, the refrigerant heat exchange assembly comprises the flow channel structure and the temperature equalizing structure, and the temperature equalizing structure exchanges heat with the flow channel structure, so that the temperatures of different positions of the flow channel structure are adjusted through the temperature equalizing structure, and the temperature difference of different positions of the refrigerant heat exchange assembly is reduced; the temperatures of different positions of the refrigerant heat exchange assembly can be more uniform, so that the stability of the battery device is improved, and the safety risk of the battery device is reduced.

Description

[0001] This application claims priority to the Chinese Patent Application No.

[0002] 202420907842.4, entitled "Heat Exchange Device, Battery and Electric Device" filed on April 28, 2024 with the State Intellectual Property Office of China, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of batteries, in particular to a battery device, a refrigerant heat exchange assembly and an electric device. BACKGROUND

[0004] At present, from the development of market situation, the application of power battery is more and more extensive. The power battery is not only applied to the energy storage power supply system of hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of power battery, the market demand is also increasing.

[0005] In the current battery device, the refrigerant heat exchange assembly (such as cold plate, etc.) has inconsistent cooling effect on each battery monomer, which is easy to cause uneven temperature distribution in the battery device, and is easy to cause local high temperature, thereby easily leading to the decrease of stability and the increase of safety risk of the battery device. UTILITY MODEL CONTENT

[0006] In view of the above problems, the present application provides a battery device, a refrigerant heat exchange assembly and an electric device, which can alleviate the problem of inconsistent heat exchange effect of the refrigerant heat exchange assembly.

[0007] In the first aspect, the embodiments of the present application provide a battery device, comprising:

[0008] a box body; a battery monomer contained in the box body; a refrigerant heat exchange assembly for heat exchange with the battery monomer, the refrigerant heat exchange assembly comprising a flow channel structure and a uniform temperature structure, the flow channel structure being used for the flow of a first heat exchange medium to exchange heat with the battery monomer, and the uniform temperature structure being arranged adjacent to the flow channel structure and used for heat exchange with the flow channel structure.

[0009] In the technical scheme of the present embodiment, the refrigerant heat exchange assembly comprises the flow channel structure and the uniform temperature structure, and the uniform temperature structure exchanges heat with the flow channel structure, so as to adjust the temperature of different positions of the flow channel structure through the uniform temperature structure, thereby reducing the temperature difference of different positions of the refrigerant heat exchange assembly, making the temperature of different positions of the refrigerant heat exchange assembly more uniform, and improving the stability of the battery device and reducing the safety risk of the battery device.

[0010] In some embodiments, the flow channel structure comprises a first plate body and a second plate body connected to the first plate body, a first cavity is formed between the first plate and the second plate body, and the first cavity is used for the first heat exchange medium to flow through; the uniform temperature structure is arranged on a side of the second plate body away from the battery monomer.

[0011] The technical scheme of the embodiment provides specific structures of some refrigerant heat exchange assemblies, connects the first plate body and the second plate body to form a flow channel structure, arranges the uniform temperature structure on a side of the second plate body away from the battery monomer, so that the uniform temperature structure can better exchange heat with the flow channel structure, thereby better reducing temperature differences at different positions of the flow channel structure and improving temperature consistency of the flow channel structure, and the arrangement can also reduce negative effects of the uniform temperature structure on heat exchange between the flow channel structure and the battery monomer.

[0012] In some embodiments, the uniform temperature structure comprises a third plate body connected to a side of the first plate body away from the second plate body, the third plate body is configured to exchange heat with the first plate body, and the third plate body is a heat conduction structural member.

[0013] The technical scheme of the embodiment provides specific structures of some uniform temperature structures, arranges a third plate body, and connects the third plate body to the second plate body to exchange heat with the flow channel structure through the third plate body, to increase temperature at positions with lower temperature in the flow channel structure through the third plate body and to reduce temperature at positions with higher temperature in the flow channel structure through the third plate body.

[0014] In some embodiments, a second cavity is arranged in the third plate body, and a second heat exchange medium is contained in the second cavity and is configured to flow in the second cavity.

[0015] In the technical scheme of the embodiment, a second cavity is arranged in the third plate body, a second heat exchange medium is arranged in the second cavity, and the second heat exchange medium is allowed to flow, the second heat exchange medium can absorb heat at positions with higher temperature and release heat at positions with lower temperature in the process of flowing of the second heat exchange medium, to transport and adjust heat distribution of the refrigerant heat exchange assembly, thereby achieving an effect of making temperature distribution of the refrigerant heat exchange assembly more uniform.

[0016] In some embodiments, the second cavity is a closed space structure, and the second heat exchange medium is a liquid phase change material.

[0017] In the technical scheme of the embodiment, the second heat exchange medium is a liquid phase change material, the liquid phase change material can absorb heat and change phase at positions with higher temperature, and the liquid phase change material after phase change can flow to positions with lower temperature and release heat, thereby achieving an effect of making temperature distribution of the refrigerant heat exchange assembly more uniform.

[0018] In some embodiments, the second cavity is a circulating space structure, so that the second heat exchange medium can flow in the second cavity.

[0019] In the technical solution of the embodiment, the second heat exchange medium can flow in the second cavity, and the second heat exchange medium can carry heat from a high-temperature position to a low-temperature position in the process of flowing, so that the temperature distribution of the refrigerant heat exchange assembly is more uniform.

[0020] In some embodiments, the second cavity is provided with a first reinforcing member connected to the third plate body.

[0021] In the technical solution of the embodiment, the first reinforcing member is arranged in the second cavity to improve the strength of the third plate body through the first reinforcing member.

[0022] In some embodiments, the third plate body and the first plate body enclose a third cavity, and the third cavity contains a third heat exchange medium, and the third heat exchange medium is configured to be able to flow in the third cavity.

[0023] In the technical solution of the embodiment, the third plate body and the first plate body enclose a third cavity, and the third heat exchange medium is able to flow in the third cavity. In the process of flowing, the third heat exchange medium can absorb heat at a position with a higher temperature and release heat at a position with a lower temperature, so as to carry and adjust the heat distribution of the refrigerant heat exchange assembly, thereby achieving the effect of making the temperature distribution of the refrigerant heat exchange assembly more uniform. Meanwhile, the third cavity is formed between the first plate body and the third plate body, which can also reduce the space occupation of the refrigerant heat exchange assembly.

[0024] In some embodiments, the first plate body is recessed towards a direction away from the second plate body and protrudes towards a direction of the third plate body, so as to form a first flow channel groove on a side of the first plate body facing the second plate body and form a second flow channel groove on a side of the first plate body facing the third plate body; the second plate body is connected to the first plate body and covers the first flow channel groove to form the first cavity; and the third plate body is connected to the first plate body and covers the second flow channel groove to form the third cavity.

[0025] The technical solution of the embodiment provides a specific structure of the first plate body, which is recessed towards a direction away from the second plate body, so as to form a first flow channel groove and a second flow channel groove on two sides of the first plate body respectively, and the second plate body and the third plate body can cover the corresponding first flow channel groove and second flow channel groove respectively to form the first cavity and the third cavity, thereby facilitating the formation of flow spaces of the first heat exchange medium and the third heat exchange medium.

[0026] In some embodiments, the third cavity is a closed space structure, and the third heat exchange medium is a liquid phase change material.

[0027] In the technical scheme of the embodiment, the third heat exchange medium is a liquid phase change material, the liquid phase change material can absorb heat at a high temperature and change phase, and the liquid phase change material after phase change can flow to a low temperature position and release heat, so that the temperature distribution of the refrigerant heat exchange assembly is more uniform.

[0028] In some embodiments, the third cavity is a circulating space structure, so that the third heat exchange medium can flow in the third cavity.

[0029] In the technical scheme of the embodiment, the third heat exchange medium can flow in the third cavity, and the third heat exchange medium can carry heat from a high temperature position to a low temperature position in the process of flowing, so that the temperature distribution of the refrigerant heat exchange assembly is more uniform.

[0030] In some embodiments, the uniform temperature structure further comprises a fourth cavity provided on the first plate body, the fourth cavity is not communicated with the first cavity, and the fourth cavity contains a fourth heat exchange medium, and the fourth heat exchange medium is configured to be able to flow in the fourth cavity.

[0031] In the technical scheme of the embodiment, the fourth cavity is provided, and the fourth heat exchange medium is allowed to flow in the fourth cavity, so that the third heat exchange medium flowing carries and adjusts the heat distribution of the refrigerant heat exchange assembly, so that the temperature distribution of the refrigerant heat exchange assembly is more uniform; at the same time, the first cavity and the fourth cavity are both arranged between the first plate body and the second plate body, which can also reduce the space occupation of the refrigerant heat exchange assembly.

[0032] In some embodiments, the first plate body is provided with a second flow channel groove on the side facing the second plate body, and the second flow channel groove is not communicated with the first cavity; and the second plate body covers the second flow channel groove to form the fourth cavity.

[0033] The technical scheme of the embodiment provides some specific structures of the fourth cavity, the second flow channel groove is arranged on the first plate body, and the second plate body covers the second flow channel groove to form the fourth cavity, so that the fourth heat exchange medium in the fourth cavity can better exchange heat with the second flow channel groove; at the same time, the fourth heat exchange medium can exchange heat with the second plate body and exchange heat with the battery monomer through the second plate body.

[0034] In some embodiments, the fourth cavity is a closed space structure, and the fourth heat exchange medium is a liquid phase change material.

[0035] In the technical scheme of the embodiment, the fourth heat exchange medium is a liquid phase change material, the liquid phase change material can absorb heat at a high temperature and change phase, and the liquid phase change material after phase change can flow to a low temperature position and release heat, so that the temperature distribution of the refrigerant heat exchange assembly is more uniform.

[0036] In some embodiments, the fourth cavity is a circulating space structure, so that the fourth heat exchange medium can flow in the fourth cavity.

[0037] In the technical solution of the embodiment, the fourth heat exchange medium can flow in the fourth cavity, and the fourth heat exchange medium can carry heat from a high temperature to a low temperature in the process of circulating flow, so that the temperature distribution of the refrigerant heat exchange assembly is more uniform.

[0038] In some embodiments, the flow channel structure includes a first plate body connected to the box body, and a first flow channel groove is arranged on the side of the first plate body facing the battery cell; the uniform temperature structure includes a fourth plate body connected to the side of the first plate body facing the battery cell, and the fourth plate body covers the first flow channel groove, and the fourth plate body is a heat conduction structure.

[0039] In the technical solution of the embodiment, the fourth plate body is arranged, and the fourth plate body covers the first flow channel groove and forms the flow channel structure; the fourth plate body is a heat conduction structure, so that heat exchange is performed between the fourth plate body and the flow channel structure, the temperature of the position with lower temperature in the flow channel structure is increased by the fourth plate body, and the temperature of the position with higher temperature in the flow channel structure is reduced by the fourth plate body.

[0040] In some embodiments, a fifth cavity is arranged in the fourth plate body, and a fifth heat exchange medium is contained in the fifth cavity, and the fifth heat exchange medium is configured to be able to flow in the fifth cavity.

[0041] In the technical solution of the embodiment, the fourth plate body is arranged, and the fourth plate body covers the first flow channel groove and forms the flow channel structure; at the same time, the fifth cavity is arranged in the fourth plate body, and the flowable fifth heat exchange medium is arranged in the fifth cavity, so that the flowable fifth heat exchange medium carries and adjusts the heat distribution of the refrigerant heat exchange assembly, so that the temperature distribution of the refrigerant heat exchange assembly is more uniform; the arrangement can not only achieve the effect of uniform temperature, but also reduce the space occupation of the refrigerant heat exchange assembly.

[0042] In some embodiments, a second reinforcing member connected to the fourth plate body is arranged in the fifth cavity.

[0043] In the technical solution of the embodiment, the second reinforcing member is arranged in the fifth cavity, so that the strength of the fourth plate body is increased by the second reinforcing member, so that the fourth plate body can better support the battery cell.

[0044] In some embodiments, the box body includes a first box body and a second box body connected to the first box body, the first box body and the second box body are buckled to each other and form a containing cavity, and the battery cell is contained in the containing cavity.

[0045] The technical scheme of the embodiment provides specific structures of the box, so that the battery monomer can be accommodated in the box.

[0046] In some embodiments, the second box comprises a frame structure and a bottom structure, the bottom structure is connected to one side of the frame structure, and the first box is connected to the side of the frame structure away from the bottom structure, the first box, the frame structure and the bottom structure enclose the accommodation cavity; the refrigerant heat exchange assembly is connected to the side of the bottom structure facing the battery monomer, or the refrigerant heat exchange assembly is connected to the side of the bottom structure away from the battery monomer.

[0047] The technical scheme of the embodiment provides installation positions of the refrigerant heat exchange assembly on the box, so that the refrigerant heat exchange assembly can exchange heat with the battery monomer.

[0048] In some embodiments, the second box comprises a frame structure and a refrigerant heat exchange assembly, the refrigerant heat exchange assembly is connected to one side of the frame structure, and the first box is connected to the side of the frame structure away from the refrigerant heat exchange assembly, the first box, the frame structure and the refrigerant heat exchange assembly enclose the accommodation cavity.

[0049] In the technical scheme of the embodiment, the refrigerant heat exchange assembly can exchange heat with the battery monomer to control the temperature of the battery monomer, and the refrigerant heat exchange assembly also serves as the bottom structure of the second box to bear and support the battery monomer.

[0050] In a second aspect, the embodiment of the present application provides a refrigerant heat exchange assembly, comprising:

[0051] The flow channel structure is used for the first heat exchange medium to flow through, and the temperature equalizing structure is arranged adjacent to the flow channel structure and is used for heat exchange with the flow channel structure.

[0052] In a third aspect, some embodiments of the present application also provide a power consumption device comprising the battery device provided by some embodiments of the first aspect or the refrigerant heat exchange assembly provided by some embodiments of the second aspect.

[0053] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0054] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are intended to depict only preferred embodiments of the application, and therefore should not be considered to narrow the scope of the present application. Rather, the entire description of the application will provide those skilled in the art with a complete understanding of the application, and of the requisite apparatus to make and use the application. All questions regarding the scope of the application should be determined by reference to the appended claims, in which:

[0055] Figure 1 A structural schematic diagram of a vehicle provided for some embodiments of the present application;

[0056] Figure 2 An exploded structural schematic diagram of a battery device provided for some embodiments of the present application Figure 1 ;

[0057] Figure 3 An exploded structural schematic diagram of a battery device provided for some embodiments of the present application

[0058] Figure 4 An exploded structural schematic diagram of a battery device provided for some embodiments of the present application Figure 2 ;

[0059] Figure 5 An exploded structural schematic diagram of a refrigerant heat exchange assembly provided for some embodiments of the present application Figure 1 ;

[0060] Figure 6 A sectional view schematic diagram of a third plate provided for some embodiments of the present application;

[0061] Figure 7 An exploded structural schematic diagram of a refrigerant heat exchange assembly provided for some embodiments of the present application Figure 2 ;

[0062] Figure 8 A sectional view schematic diagram of a refrigerant heat exchange assembly provided for some embodiments of the present application;

[0063] Figure 9 An exploded structural schematic diagram of a refrigerant heat exchange assembly provided for some embodiments of the present application Figure 3 ;

[0064] Figure 10 A top view schematic diagram of a first plate provided for some embodiments of the present application;

[0065] Figure 11 An exploded structural schematic diagram of a refrigerant heat exchange assembly provided for some embodiments of the present application Figure 4 ;

[0066] Figure 12 A sectional view schematic diagram of a fourth plate provided for some embodiments of the present application;

[0067] Figure 13 An exploded structural schematic diagram of a battery device provided for some embodiments of the present application Figure 3 .

[0068] The meanings of the marks in the figures are as follows:

[0069] 1000, vehicle;

[0070] 100, battery device;

[0071] 10, box; 101, accommodating cavity; 11, first box; 12, second box; 121, frame structure; 122, bottom structure;

[0072] 20, battery cell; 21, end cover; 22, shell; 23, electrode assembly; 24, electrode terminal;

[0073] 30, refrigerant heat exchange assembly; 31, flow channel structure; 311, first plate body; 3111, first flow channel groove; 3112, second flow channel groove; 312, second plate body; 313, first cavity; 32, uniform temperature structure; 321, third plate body; 3211, second cavity; 3212, first reinforcing member; 322, third cavity; 323, fourth cavity; 324, fourth plate body; 3241, fifth cavity; 3242, second reinforcing member;

[0074] 200, motor;

[0075] 300, controller. DETAILED DESCRIPTION

[0076] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0077] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0078] 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 "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0079] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0080] In the description of the embodiments of the present application, the term "and / or" is merely an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0081] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0082] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0083] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing", and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0084] At present, from the development of market situation, the application of power battery is more and more extensive. Power battery is not only applied to energy storage power supply systems such as hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0085] Because the battery monomer usually generates heat in the process of charging and discharging cycle, and is easy to cause the temperature of the environment where the battery monomer is located to rise, and the charging and discharging efficiency of the battery monomer in a higher environment temperature will decrease. Therefore, the current battery device is usually provided with a refrigerant heat exchange assembly, such as a cold plate structure, to control the temperature of the battery monomer and the environment where it is located through the refrigerant heat exchange assembly.

[0086] In the refrigerant heat exchange assembly, the flow of the heat exchange medium to the downstream of the flow channel usually causes the heat exchange capacity to decrease due to the arrangement of the flow channel, that is, the temperature control capacity of the heat exchange medium on the battery monomer corresponding to the downstream position of the flow channel is usually poor; therefore, the heat exchange capacity of different positions of the refrigerant heat exchange assembly usually has differences, which easily causes the temperature of different positions inside the battery device to have large differences. The temperature of different positions inside the battery device has large differences, which causes the electrochemical reaction rates of the battery monomers at different positions to be different, and causes the charging and discharging performance to decrease, and also easily causes the service life of part of the battery monomers to be shortened, the risk of thermal runaway to increase, and the consistency and stability of the battery device to be negatively affected.

[0087] Based on the above considerations, in order to alleviate the problem of uneven and inconsistent heat exchange effect of the refrigerant heat exchange assembly, the battery device provided in the embodiments of the present application is configured to include a flow channel structure and a temperature equalization structure, so as to exchange heat with the battery monomer through the flow channel structure, and exchange heat with the flow channel structure through the temperature equalization structure. In such a battery monomer, the temperature equalization structure can adjust the temperature of different positions of the flow channel structure, so as to reduce the temperature difference of different parts of the refrigerant heat exchange assembly, and improve the temperature consistency of different positions of the entire refrigerant heat exchange assembly, so that the refrigerant heat exchange assembly can better control the temperature of different positions of the battery device, and reduce the temperature difference of different positions in the battery device.

[0088] The battery device disclosed in the embodiments of the present application can be used in a power consumption device using the battery device as a power source or a variety of energy storage systems using the 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 vehicle, a ship, a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, and an electric plane toy, etc., and the spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0089] The following embodiments are described for convenience with a power consumption device of an embodiment of the present application as an example of a vehicle 1000.

[0090] Reference Figure 1 , Figure 1A structural schematic diagram of a vehicle 1000 is provided for some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle, which can be a pure electric vehicle, a hybrid vehicle, or a range extended vehicle, etc. The vehicle 1000 is internally provided with a battery, which can be arranged at the bottom, head, or tail of the vehicle 1000. The battery can be used for power supply of the vehicle 1000, for example, the battery can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 300 and a motor 200, the controller 300 being used to control the battery to supply power to the motor 200, for example, for the working power demand of the vehicle 1000 during starting, navigation, and driving.

[0091] In some embodiments of the present application, the battery can not only be used as an operating power source of the vehicle 1000, but also 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.

[0092] Reference Figure 2 , Figure 2 A disassembled structural schematic diagram of a battery apparatus 100 is provided for some embodiments of the present application.

[0093] The battery apparatus 100 (Battery Apparatus) 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 (Battery Cell Assembly) can include a plurality of battery cells 20 connected in series, parallel, or mixed connection through busbar components.

[0094] In some embodiments, the battery cell assembly (Battery Cell Assembly) is generally formed by arranging a plurality of battery cells 20.

[0095] 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.

[0096] In some embodiments, the battery apparatus 100 can be a battery pack, which includes a box 10 and one or more battery cell assemblies accommodated in the box 10.

[0097] 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.

[0098] As an example, the battery cell assembly can also be accommodated in the case 10 by directly fixing a plurality of battery cells 20 to the case 10.

[0099] As an example, the case 10 can include a first case 11 and a second case 12. The first case 11 and the second case 12 are coupled so that an enclosed space is formed inside the case 10 to accommodate the battery cell assembly. The enclosed here means covered or closed, which can be sealed or unsealed. The first case 11 can be a top cover or a bottom plate.

[0100] As an example, the case 10 can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame so that an enclosed space is formed inside the case 10 to accommodate the battery cell assembly.

[0101] In some embodiments, the case 10 can be a part of a chassis structure of the vehicle 1000. For example, a part of the case 10 can be at least a part of a floor of the vehicle 1000, or a part of the case 10 can be at least a part of a cross beam and a longitudinal beam of the vehicle 1000.

[0102] Reference Figure 3 , Figure 3 A schematic diagram of a disassembled structure of a battery cell 20 is provided for some embodiments of the present application. The battery cell 20 refers to the smallest unit that constitutes a battery. The battery cell 20 can be a secondary battery, which refers to a battery cell 20 that can be activated by charging after discharging the battery cell 20.

[0103] 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., and the embodiments of the present application are not limited thereto.

[0104] As shown in the figure, the battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components.

[0105] The end cover 21 refers to a component that covers the opening of the shell 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 shell 22 to fit the shell 22. Optionally, the end cover 21 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 21 is less likely to deform when subjected to extrusion collision, allowing the battery cell 20 to have higher structural strength and improved safety performance. The end cover 21 can be provided with functional components such as the electrode terminal 24. The electrode terminal 24 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 copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon. 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 shell 22 from the end cover 21 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0106] The shell 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 shell 22 and the end cover 21 can be independent components, and an opening can be provided on the shell 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 shell 22 can also be integrated, specifically, the end cover 21 and the shell 22 can form a common connecting surface before other components enter the shell, and when it is necessary to encapsulate the internal environment of the shell 22, the end cover 21 is covered on the shell 22. The shell 22 can be various shapes and various sizes, for example, cuboid, cylinder, hexagonal prism, etc. Specifically, the shape of the shell 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the shell 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon.

[0107] The electrode assembly 23 is a component in which an electrochemical reaction occurs in the battery cell 20. One or more electrode assemblies 23 can be included inside 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. 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 tabs connect the electrode terminal 24 to form a current loop.

[0108] In a first aspect, with reference to Figure 4 、 Figure 5 , the embodiments of the present application provide a battery device 100, comprising a box body 10, a battery cell 20 and a refrigerant heat exchange assembly 30. Wherein the battery cell 20 is contained in the box body 10; the refrigerant heat exchange assembly 30 is used for heat exchange with the battery cell 20, the refrigerant heat exchange assembly 30 comprises a flow channel structure 31 and an equalizing structure 32, the flow channel structure 31 is used for the first heat exchange medium to flow through, so as to exchange heat with the battery cell 20, the equalizing structure 32 is arranged adjacent to the flow channel structure 31, the equalizing structure 32 is used for heat exchange with the flow channel structure 31, so that the overall temperature of the flow channel structure 31 tends to be consistent.

[0109] The box body 10 refers to a structure in the battery device 100 for providing a fixed basis for the battery cell 20, the controller 300 and other structures; the box body 10 can be cuboid, cylindrical or other shapes.

[0110] The battery cell 20 refers to the smallest unit that constitutes the battery device 100, the battery cell 20 can be a cylindrical structure, a prismatic structure, a sheet structure or other shapes; the number of battery cells 20 can be one, two or more; in the case of multiple battery cells 20, the multiple battery cells 20 can be arranged in one or two different directions, and the multiple battery cells 20 can be connected in series, parallel or mixed.

[0111] The refrigerant heat exchange assembly 30 is a structure in the battery device 100 for heat exchange with the battery cell 20, the number of refrigerant heat exchange assemblies 30 can be one, two or more; in the case of multiple battery cells 20, the number of refrigerant heat exchange assemblies 30 can be one, and each battery cell 20 exchanges heat with the refrigerant heat exchange assembly 30 to control the temperature of each battery cell 20; in the case of multiple battery cells 20, the number of refrigerant heat exchange assemblies 30 can also be two or more, at this time one refrigerant heat exchange assembly 30 can exchange heat with one or more battery cells 20 in the same row or column.

[0112] The flow channel structure 31 refers to a structure for passing the heat exchange medium in the refrigerant heat exchange assembly 30. The flow channel structure 31 can include a pipe structure, which can be in a serpentine shape, a spiral shape, or other shapes. The flow channel structure 31 can also include a channel structure arranged in a base member, which can be in a plate structure, a block structure, or other structures. The base member can be in a rectangular plate shape, a prism shape, a cylindrical shape, or other shapes. The channel structure formed in the base member can be in a serpentine channel, a spiral channel, or other shapes.

[0113] The flow channel structure 31 can be connected to the box body 10. The flow channel structure 31 can be fixedly connected to the box body 10 by welding, bonding, or other methods. Alternatively, the flow channel structure 31 can be detachably connected to the box body 10 by clamping, screwing, or other methods. The flow channel structure 31 can be directly connected to the box body 10 or indirectly connected to the box body 10 through an intermediate structure. The flow channel structure 31 can be located inside the box body 10 or outside the box body 10. The flow channel structure 31 can be located at the bottom of each battery monomer 20 or between adjacent two battery monomers 20. The material of the flow channel structure 31 can include metal, plastic, or other materials.

[0114] The heat exchange medium flowing in the flow channel structure 31 is a first heat exchange medium. The first heat exchange medium can include a liquid medium, a gaseous medium, a solid-liquid mixed medium, or the like. The first heat exchange medium can include a refrigerant, such as tetrafluoroethane, difluoromethane, pentafluoroethane, or the like.

[0115] The uniform temperature structure 32 refers to a structure in the refrigerant heat exchange assembly 30 that is mainly used for heat exchange with the flow channel structure 31, and heat can be dispersed and transferred in the uniform temperature structure 32. The uniform temperature structure 32 can include a structure member with heat conduction performance. In this case, the uniform temperature structure 32 can not only exchange heat with the flow channel structure 31, but also can uniformly disperse and arrange heat in the uniform temperature structure 32. The uniform temperature structure 32 can also include a base member and a heat exchange medium flowing in the base member. The flowing heat exchange medium can exchange heat with the flow channel structure 31 and carry heat to flow, so as to adjust the temperature difference of different parts of the flow channel structure 31.

[0116] The uniform temperature structure 32 is arranged adjacent to the flow channel structure 31. The uniform temperature structure 32 can be directly connected to the flow channel structure 31, or indirectly connected to the flow channel structure 31 through other structures. According to the specific structure of the uniform temperature structure 32, the uniform temperature structure 32 can be fixedly connected to the flow channel structure 31 by welding, bonding, or other methods. Alternatively, the uniform temperature structure 32 can be detachably connected to the flow channel structure 31 by screwing, clamping, or other methods. The uniform temperature structure 32 can also be arranged inside the flow channel structure 31.

[0117] The uniform temperature structure 32 can be arranged on the side of the flow channel structure 31 facing the battery monomer 20, or on the side of the flow channel structure 31 away from the battery monomer 20, or inside the flow channel structure 31 or other positions; the uniform temperature structure 32 can exchange heat only with the flow channel structure 31, or exchange heat with both the flow channel structure 31 and the battery monomer 20.

[0118] At the position of the flow channel structure 31 with a higher temperature, the uniform temperature structure 32 exchanges more heat with the corresponding position of the flow channel structure 31, so that the temperature of the corresponding position of the flow channel structure 31 decreases greatly, and the temperature of the corresponding position of the uniform temperature structure 32 increases; the heat locally increased by the uniform temperature structure 32 will be dispersed to other positions (e.g. positions with a lower temperature) of the uniform temperature structure 32, and the overall temperature of the uniform temperature structure 32 increases; at this time, at the position of the flow channel structure 31 with a lower temperature, according to the temperature relationship between the position of the flow channel structure 31 and the corresponding position of the uniform temperature structure 32, the uniform temperature structure 32 can release heat to the flow channel structure 31 to increase the temperature of the corresponding position of the flow channel structure 31, or the flow channel structure 31 can transfer heat to the uniform temperature structure 32, and the heat transferred is less, so that the temperature of the corresponding position of the flow channel structure 31 increases or the temperature decrease is smaller, thereby reducing the temperature difference between different positions of the flow channel structure 31. That is, the heat exchanged between different positions of the uniform temperature structure 32 and the flow channel structure 31 is different, and the temperature difference between different positions of the flow channel structure 31 is adjusted, the temperature difference between different positions of the flow channel structure 31 is reduced, and the uniformity of the temperature of the flow channel structure 31 is improved.

[0119] In the embodiment, the refrigerant heat exchange assembly 30 includes the flow channel structure 31 and the uniform temperature structure 32, and exchanges heat with the flow channel structure 31 through the uniform temperature structure 32, so as to adjust the temperature of different positions of the flow channel structure 31 through the uniform temperature structure 32, thereby reducing the temperature difference between different positions of the refrigerant heat exchange assembly 30, making the temperature of different positions of the refrigerant heat exchange assembly 30 more uniform, and improving the stability of the battery device 100 and reducing the safety risk of the battery device 100.

[0120] Reference Figures 4 to 10 In some embodiments, the flow channel structure 31 includes a first plate body 311 connected to the box body 10 and a second plate body 312 connected to the first plate body 311, and a first cavity 313 is formed between the first plate body 311 and the second plate body 312 for the first heat exchange medium to flow through; the uniform temperature structure 32 is arranged on the side of the second plate body 312 away from the battery monomer 20.

[0121] The first plate body 311 refers to a structure for bearing the first heat exchange medium in the flow channel structure 31. The first plate body 311 can be square, circular or other shapes. The material of the first plate body 311 can include metal, plastic or other materials.

[0122] The second plate body 312 refers to a structure for cooperating with the first plate body 311 to form the first cavity 313 in the flow channel structure 31. The second plate body 312 can be square, circular or other shapes. The material of the second plate body 312 can include metal, plastic or other materials.

[0123] The first cavity 313 refers to a space structure for the first heat exchange medium to flow in the flow channel structure 31. The first cavity 313 is formed between the first plate body 311 and the second plate body 312, that is, the first cavity 313 can be surrounded by the first plate body 311 and the second plate body 312. For example, a groove can be provided on the first plate body 311, and the second plate body 312 is covered on the groove to form the first cavity 313. For example, a groove can be provided on the second plate body 312, and the first plate body 311 is covered on the groove to form the first cavity 313. For example, other structural members can be provided between the first plate body 311 and the second plate body 312, so that the first plate body 311 and the second plate body 312 cooperate with the structural members to surround the first cavity 313.

[0124] The first cavity 313 can be a channel structure or other structures. The first cavity 313 can extend along a straight line, or be curved and in the shape of a snake, a spiral or other shapes. In a plane perpendicular to the flow direction of the first heat exchange medium in the first cavity 313, the cross-sectional shape of the first cavity 313 can be square, trapezoidal, semicircular or other shapes. The first cavity 313 can be formed by deforming the first plate body 311, for example, the first cavity 313 can be formed by stamping, bending or other processes on the first plate body 311. The first cavity 313 can be formed by connecting structural members to the first plate body 311, for example, a plurality of straight plates or bent plates can be connected on the first plate body 311, and the first cavity 313 is formed between adjacent two straight plates or bent plates.

[0125] In the case that the second plate body 312 can cooperate with the first plate body 311 to form the first cavity 313, the second plate body 312 can be the same shape as the first plate body 311, or different. The second plate body 312 can be connected to the first plate body 311 by welding, bonding or other means. In the case that the flow channel structure 31 is connected to the cabinet 10, the first plate body 311 can be connected to the cabinet 10, or the second plate body 312 can be connected to the cabinet 10, or both the first plate body 311 and the second plate body 312 can be connected to the cabinet 10.

[0126] The second plate body 312 is arranged on the side of the first plate body 311 facing the battery cell 20, so that the flow channel structure 31 exchanges heat with the battery cell 20 through the second plate body 312.

[0127] The temperature equalizing structure 32 is arranged on the side of the second plate body 312 away from the battery cell 20. In this case, the temperature equalizing structure 32 can be located on the side of the first plate body 311 away from the second plate body 312, or the temperature equalizing structure 32 can be located between the first plate body 311 and the second plate body 312, or the temperature equalizing structure 32 can be located at other positions.

[0128] The temperature equalizing structure 32 is arranged on the side of the second plate body 312 away from the battery cell 20, that is, the temperature equalizing structure 32 is mainly used for heat exchange with the flow channel structure 31 to adjust the temperature of different positions of the flow channel structure 31 and reduce the temperature difference of different positions of the flow channel structure 31. At the same time, this arrangement also makes it difficult for the temperature equalizing structure 32 to directly contact the battery cell 20, thereby reducing the interference of the battery cell 20 on the temperature equalizing performance of the temperature equalizing structure 32, so that the temperature equalizing structure 32 can better adjust the temperature of the flow channel structure 31.

[0129] The embodiment provides specific structures of some refrigerant heat exchange assemblies 30, so that the first plate body 311 and the second plate body 312 are connected to form the flow channel structure 31. At the same time, the temperature equalizing structure 32 is arranged on the side of the second plate body 312 away from the battery cell 20, so that the temperature equalizing structure 32 can better exchange heat with the flow channel structure 31, thereby better reducing the temperature difference of different positions of the flow channel structure 31 and improving the temperature consistency of the flow channel structure 31. This arrangement can also reduce the negative impact of the temperature equalizing structure 32 on the heat exchange between the flow channel structure 31 and the battery cell 20.

[0130] Reference Figure 5 In some embodiments, the temperature equalizing structure 32 includes a third plate body 321 connected to the side of the first plate body 311 away from the second plate body 312, and the third plate body 321 is configured to exchange heat with the first plate body 311. The third plate body 321 is a heat conduction structure.

[0131] The third plate body 321 refers to a structure in the temperature equalizing structure 32 for heat exchange with the first plate body 311. The third plate body 321 can be circular, square or other shapes. The number of third plate bodies 321 can be one, two or more. Each third plate body 321 can completely cover the corresponding surface of the first plate body 311, or only cover a part of the corresponding surface of the first plate body 311. The third plate body 321 is connected to the first plate body 311. The third plate body 321 can be fixedly connected to the first plate body 311 by welding, bonding or other means. The third plate body 321 can also be detachably connected to the first plate body 311 by screwing, clamping or other means. The material of the third plate body 321 can include metal, plastic or other materials.

[0132] The third plate body 321 is used for heat exchange with the first plate body 311, that is, the third plate body 321 is a heat conduction structure, and the third plate body 321 has certain heat conduction performance; for example, the material of the third plate body 321 can include aluminum, copper or other heat conduction materials.

[0133] The third plate body 321 is arranged on the side of the first plate body 311 away from the second plate body 312, that is, the third plate body 321 is located on the side of the flow channel structure 31 away from the battery monomer 20; the third plate body 321 can exchange heat with the first plate body 311 on the side of the first plate body 311 away from the second plate body 312, so as to adjust the temperature of different positions of the first plate body 311; at this time, the temperature equalization structure 32 is mainly used for heat exchange with the flow channel structure 31 and adjusting the temperature of the flow channel structure 31.

[0134] Because the first cavity 313 is arranged between the first plate body 311 and the second plate body 312, and the first heat exchange medium flows through the first cavity 313, the third plate body 321 exchanges heat with the first plate body 311, so as to adjust the temperature of the first heat exchange medium at different positions, thereby reducing the temperature difference of the first heat exchange medium at different positions in the flow channel structure 31.

[0135] At the position of the flow channel structure 31 with a higher temperature, the third plate body 321 exchanges more heat with the corresponding position of the first plate body 311, so that the temperature of the corresponding position of the flow channel structure 31 decreases greatly, and the temperature of the corresponding position of the third plate body 321 increases; the heat locally increased by the third plate body 321 will be dispersed to other positions (for example, positions with a lower temperature) of the third plate body 321, and the overall temperature of the third plate body 321 increases; at this time, at the position of the flow channel structure 31 with a lower temperature, according to the temperature relationship between the position of the flow channel structure 31 and the corresponding position of the third plate body 321, the third plate body 321 can release heat to the flow channel structure 31 to increase the temperature of the corresponding position of the flow channel structure 31, and the flow channel structure 31 can also transfer heat to the third plate body 321, and the heat transferred is less, so that the temperature of the corresponding position of the flow channel structure 31 increases or the temperature decrease amplitude is smaller, so as to reduce the temperature difference of different positions of the flow channel structure 31.

[0136] The embodiment provides specific structures of some temperature equalization structures 32, the third plate body 321 is arranged and connected with the second plate body 312, so as to exchange heat with the channel structure through the third plate body 321, increase the temperature of the position with a lower temperature in the channel structure through the third plate body 321, and decrease the temperature of the position with a higher temperature in the channel structure through the third plate body 321.

[0137] Reference Figure 5 , Figure 6In some embodiments, the third plate body 321 is internally provided with a second cavity 3211, and the second cavity 3211 contains a second heat exchange medium, which is configured to be able to flow in the second cavity 3211.

[0138] The second cavity 3211 refers to a space structure arranged inside the third plate body 321, which can be a prismatic space, a cylindrical space or other space structures. The number of the second cavity 3211 can be one, two or more.

[0139] The second heat exchange medium refers to a medium capable of exchanging heat with the third plate body 321 and the first plate body 311. The second heat exchange medium can include liquid medium, gaseous medium, solid-liquid mixed medium, etc. The material of the second heat exchange medium can include refrigerant, such as tetrafluoroethane, difluoromethane, pentafluoroethane, etc. The material of the second heat exchange medium can also include coolant, such as water, ethylene glycol solution, etc.

[0140] The second heat exchange medium can flow in the second cavity 3211 to transport and adjust heat. In the part of the flow channel structure 31 with a higher temperature, the second heat exchange medium in the second cavity 3211 exchanges more heat with the corresponding part of the first plate body 311, so that the temperature of the corresponding part of the flow channel structure 31 decreases greatly, and the heat carried by the second heat exchange medium is higher at this time. Then, the second heat exchange medium flows to the position corresponding to the part of the flow channel structure 31 with a lower temperature, and the second heat exchange medium releases heat to the flow channel structure 31 to increase the temperature of the corresponding part of the flow channel structure 31. The flow channel structure 31 can also transfer heat to the second heat exchange medium, and the heat transferred is less, so that the temperature of the corresponding part of the flow channel structure 31 increases or the temperature decrease is smaller, thereby reducing the temperature difference between different parts of the flow channel structure 31.

[0141] In this embodiment, the second cavity 3211 is arranged in the third plate body 321, the second heat exchange medium is arranged in the second cavity 3211, and the second heat exchange medium is able to flow. In the process of flowing of the second heat exchange medium, the second heat exchange medium can absorb heat at a position with a higher temperature than itself and release heat at a position with a lower temperature than itself, so as to transport and adjust the arrangement of heat of the refrigerant heat exchange assembly 30, thereby achieving the effect of making the temperature arrangement of the refrigerant heat exchange assembly 30 more uniform.

[0142] In some embodiments, the second cavity 3211 is a closed space structure, and the second heat exchange medium is a liquid phase change material.

[0143] The second cavity 3211 is a closed space structure, that is, the second heat exchange medium can flow in the second cavity 3211, but it is difficult to flow out of the second cavity 3211.

[0144] The phase change material refers to a material capable of changing from one physical state to another physical state to absorb or release heat, and the phase change material can flow in the second cavity 3211 autonomously in the process of changing the physical state of the phase change material. For example, the phase change material can change from a liquid state to a gaseous state and absorb heat in the process, and the phase change material can also change from a gaseous state to a liquid state and release heat in the process; the gaseous phase change material carrying heat can flow to a position with a lower temperature and can push the liquid phase change material to a position with a higher temperature.

[0145] The liquid phase change material can include tetrafluoroethane, difluoromethane, pentafluoroethane, etc.

[0146] In the case where the second heat exchange medium is a liquid phase change material, the second heat exchange medium autonomously flows in the process of phase change without the need of an external driving device to drive the flow, and therefore the second cavity 3211 can be a closed space structure.

[0147] Taking the case where the second heat exchange medium can change between a liquid state and a gaseous state as an example, at a position with a higher temperature of the flow channel structure 31, the second heat exchange medium in the second cavity 3211 can change from a liquid state to a gaseous state and absorb heat in the process; then, the gaseous second heat exchange medium can flow to a position with a lower temperature in the second cavity 3211, which corresponds to a position with a lower temperature of the flow channel structure 31, according to the temperature relationship between the second heat exchange medium in the corresponding position of the flow channel structure 31 and the second cavity 3211, the second heat exchange medium can release heat to the flow channel structure 31 to increase the temperature of the corresponding position of the flow channel structure 31, or the flow channel structure 31 can transfer less heat to the second heat exchange medium, so that the temperature of the corresponding position of the flow channel structure 31 increases or the temperature decreases at a smaller amplitude, so as to reduce the temperature difference between different positions of the flow channel structure 31.

[0148] In the embodiment, the second heat exchange medium is a phase change material, which can absorb heat at a position with a higher temperature and change phase, and the phase changed phase change material can flow to a position with a lower temperature and release heat, so as to achieve the effect of making the temperature distribution of the refrigerant heat exchange assembly 30 more uniform.

[0149] In some embodiments, the second cavity 3211 is a circulating space structure, so that the second heat exchange medium can flow in the second cavity 3211.

[0150] The circulation space structure refers to a space structure with a certain path and connected at the head and tail. The circulation space structure can be a strip-shaped space structure and connected at the head and tail. The second cavity 3211 can be a circular ring-shaped space structure, a square ring-shaped space structure, or a circulation space structure of other shapes. At this time, the second cavity 3211 can be a closed circulation space structure, and the third cavity 322 can also be in communication with other structures outside the environment, for example, an external driving device (such as a water pump, etc.) located outside the second cavity 3211 can be provided, and the second cavity 3211 is in communication with the external driving device to drive the second heat exchange medium to flow in the second cavity 3211.

[0151] The second heat exchange medium can circulate in the second cavity 3211, that is, the second heat exchange medium can circulate in the second cavity 3211 in a certain direction. In the process of flowing, the second heat exchange medium can exchange heat with the first plate body 311 to absorb heat from the flow channel structure 31 or release heat to the flow channel structure 31.

[0152] The second heat exchange medium can circulate in the second cavity 3211 by the force generated by the change of heat. The second heat exchange medium can also be driven by an external driving device (such as a water pump, etc.) to circulate in the second cavity 3211. At this time, the second heat exchange medium can include a refrigerant, for example, the second heat exchange medium can include tetrafluoroethane, difluoromethane, pentafluoroethane, etc. The second heat exchange medium can also include a cooling liquid, for example, the second heat exchange medium can include water, ethylene glycol solution, etc.

[0153] At the part of the flow channel structure 31 with a higher temperature, the second heat exchange medium can absorb more heat, and the temperature of the corresponding part of the flow channel structure 31 can decrease more. At the part of the flow channel structure 31 with a lower temperature, according to the temperature relationship between the second heat exchange medium in the corresponding part of the flow channel structure 31 and the second cavity 3211, the second heat exchange medium can absorb a small amount of heat from the flow channel structure 31, or the second heat exchange medium can release heat to the flow channel structure 31, so that the temperature of the corresponding part of the flow channel structure 31 decreases less or increases, thereby reducing the temperature difference between different parts of the flow channel structure 31.

[0154] In this embodiment, the second heat exchange medium can circulate in the second cavity 3211, and the second heat exchange medium can transport heat from a high-temperature part to a low-temperature part in the process of circulating, thereby achieving the effect of making the temperature distribution of the refrigerant heat exchange assembly 30 more uniform.

[0155] Reference Figure 5 、 Figure 6 In some embodiments, the first reinforcing member 3212 connected to the third plate body 321 is arranged in the second cavity 3211.

[0156] The first reinforcing member 3212 refers to a reinforcing structure arranged in the second cavity 3211. The first reinforcing member 3212 can be a plate-shaped structure, a columnar structure, or a structure of other shapes. The first reinforcing member 3212 can be a square plate-shaped structure, a trapezoidal plate-shaped structure, a prism-shaped structure, a cylindrical structure, or a structure of other shapes. The number of the first reinforcing member 3212 can be one, two, or more.

[0157] The first reinforcing member 3212 can be connected to the surface of the second cavity 3211 facing or away from the first plate body 311. The first reinforcing member 3212 can also be connected to other surfaces of the second cavity 3211. For example, the two ends of the first reinforcing member 3212 are respectively connected to the surfaces of the second cavity 3211 facing and away from the first plate body 311.

[0158] Because the third plate body 321 is provided with the second cavity 3211, the strength of the third plate body 321 is low, and the third plate body 321 has a risk of deformation. The deformation of the third plate body 321 can easily affect the flow of the second heat exchange medium in the second cavity 3211, and further affect the uniform temperature effect of the second heat exchange medium. Accordingly, the first reinforcing member 3212 is arranged to improve the strength of the third plate body 321 and reduce the risk of deformation of the third plate body 321.

[0159] In this embodiment, the first reinforcing member 3212 is arranged in the second cavity 3211 to improve the strength of the third plate body 321 through the first reinforcing member 3212.

[0160] Reference Figure 7 、 Figure 8 In some embodiments, the third plate body 321 and the first plate body 311 enclose a third cavity 322, and the third cavity 322 contains a third heat exchange medium. The third heat exchange medium is configured to be able to flow in the third cavity 322.

[0161] The third cavity 322 refers to a space structure formed between the third plate body 321 and the first plate body 311. According to the shapes of the first plate body 311 and the third plate body 321, the third cavity 322 can be a cylindrical space structure, a prism-shaped space structure, a strip-shaped space structure, or a space structure of other shapes. When the first cavity 313 is a bending or deformation of the first plate body 311 away from the second plate body 312, the third cavity 322 can also be a bending channel-shaped space structure.

[0162] The third heat exchange medium refers to a heat exchange medium contained in the third cavity 322, the third heat exchange medium can exchange heat with the first plate body 311, and the third heat exchange medium can include a liquid medium, a gaseous medium, a solid-liquid mixed medium, etc.; the material of the third heat exchange medium can include a refrigerant, for example, the third heat exchange medium can include tetrafluoroethane, difluoromethane, pentafluoroethane, etc., and the material of the third heat exchange medium can also include a cooling liquid, for example, the third heat exchange medium can include water, ethylene glycol solution, etc.

[0163] The third heat exchange medium can flow in the third cavity 322 to play a role in carrying and adjusting heat. In the part of the flow channel structure 31 with a higher temperature, the third heat exchange medium in the third cavity 322 exchanges more heat with the corresponding part of the first plate body 311, so that the temperature of the corresponding part of the flow channel structure 31 decreases greatly, and at this time, the third heat exchange medium carries more heat; then, the third heat exchange medium flows to the position corresponding to the part of the flow channel structure 31 with a lower temperature, and according to the temperature difference between the third heat exchange medium and the corresponding flow channel structure 31, the third heat exchange medium can release heat to the flow channel structure 31 to increase the temperature of the corresponding part of the flow channel structure 31, or the flow channel structure 31 can transfer less heat to the third heat exchange medium, so that the temperature of the corresponding part of the flow channel structure 31 increases or the temperature decrease amplitude is smaller, thereby reducing the temperature difference between different parts of the flow channel structure 31.

[0164] In the case that the third plate body 321 and the first plate body 311 enclose the third cavity 322, the second cavity 3211 can not be arranged in the third plate body 321, at this time, the third plate body 321 is only used to cooperate with the first plate body 311 to enclose the third cavity 322, and at this time, the thickness of the third plate body 321 can be smaller; in the case that the third plate body 321 and the first plate body 311 enclose the third cavity 322, the second cavity 3211 can also not be arranged in the third plate body 321, and the second heat exchange medium can be arranged in the second cavity 3211, at this time, the second heat exchange medium and the third heat exchange medium can both be used for uniform temperature treatment of the flow channel structure 31, so that the temperature of the flow channel structure 31 can be better carried and adjusted.

[0165] In the embodiment, the third plate body 321 and the first plate body 311 enclose the third cavity 322, and the third heat exchange medium can flow in the third cavity 322, in the process of flowing of the third heat exchange medium, the third heat exchange medium can absorb heat at a position with a higher temperature than itself and release heat at a position with a lower temperature than itself, so as to carry and adjust the arrangement of heat of the refrigerant heat exchange assembly 30, thereby achieving the effect of making the temperature arrangement of the refrigerant heat exchange assembly 30 more uniform; at the same time, the third cavity 322 is formed between the first plate body 311 and the third plate body 321, which can also reduce the space occupation of the refrigerant heat exchange assembly 30.

[0166] In some embodiments, the first plate body 311 is recessed towards the direction away from the second plate body 312 and is convex towards the direction where the third plate body 321 is located, so as to form a first flow channel groove 3111 on the side of the first plate body 311 facing the second plate body 312 and a second flow channel groove 3112 on the side of the first plate body 311 facing the third plate body 321; the second plate body 312 is connected to the first plate body 311 and covers the first flow channel groove 3111, so as to form a first cavity 313; the third plate body 321 is connected to the first plate body 311 and covers the second flow channel groove 3112, so as to form a third cavity 322.

[0167] The first flow channel groove 3111 refers to a groove-shaped structure formed by the recess of the first plate body 311 towards the direction away from the second plate body 312, that is, the first flow channel groove 3111 is arranged on the side of the first plate body 311 facing the second plate body 312, and the first heat exchange medium can flow in the first flow channel groove 3111; in the plane perpendicular to the flow direction of the first heat exchange medium in the first flow channel groove 3111, the cross-sectional shape of the first flow channel groove 3111 can be square, trapezoidal, semicircular or other shapes; the first flow channel groove 3111 can extend in a straight line, or can be curved in a serpentine, spiral or other shape.

[0168] The recess of the first plate body 311 towards the direction away from the second plate body 312 also forms a convex structure in the direction of the first plate body 311 facing the third plate body 321, at this time, the second flow channel groove 3112 can be formed between two adjacent convex structures. That is, the second flow channel groove 3112 refers to a groove-shaped structure formed by the convexity of the first plate body 311 towards the direction where the third plate body 321 is located, and the third heat exchange medium can flow in the second flow channel groove 3112; in the plane perpendicular to the flow direction of the third heat exchange medium in the second flow channel groove 3112, the cross-sectional shape of the second flow channel groove 3112 can be square, trapezoidal, semicircular or other shapes; according to the extension direction of the first flow channel groove 3111, the second flow channel groove 3112 can extend in a straight line, or can be curved in a serpentine, spiral or other shape.

[0169] The second plate body 312 can be connected to the first plate body 311 and cover the first flow channel groove 3111, that is, the second plate body 312 is connected to the side of the first plate body 311 facing the second plate body 312, so as to cover the first flow channel groove 3111; at this time, the second plate body 312 can shield the first flow channel groove 3111, so as to form a channel structure together with the first flow channel groove 3111, that is, the second plate body 312 forms the first cavity 313 together with the first flow channel groove 3111, so as to flow the first heat exchange medium.

[0170] The third plate body 321 can be connected to the first plate body 311, and the third plate body 321 can be connected to the first plate body 311 by welding, bonding or other means; the third plate body 321 can cover the second flow channel groove 3112, that is, the third plate body 321 is connected to the side of the first plate body 311 facing the third plate body 321 and is connected to the protruding structure of the first plate body 311 facing the third plate body 321, so as to shield the second flow channel groove 3112 and form a channel structure, that is, a third cavity 322 is formed, that is, the first plate body 311, the protruding structure of the first plate body 311 facing the third plate body 321 and the third plate body 321 can surround the third cavity 322 to flow the third heat exchange medium.

[0171] The embodiment provides some specific structures of the first plate body 311, so that the first plate body 311 is recessed in a direction away from the second plate body 312, so as to form the first flow channel groove 3111 and the second flow channel groove 3112 on two sides of the first plate body 311 respectively, and so that the second plate body 312 and the third plate body 321 can cover the corresponding first flow channel groove 3111 and the second flow channel groove 3112 respectively, so as to form the first cavity 313 and the third cavity 322, thereby facilitating the formation of the flow space of the first heat exchange medium and the third heat exchange medium.

[0172] In some embodiments, the third cavity 322 is a closed space structure, and the third heat exchange medium is a liquid phase change material.

[0173] The third cavity 322 is a closed space structure, that is, the third heat exchange medium can flow in the third cavity 322, but it is difficult to flow out of the third cavity 322.

[0174] The liquid phase change material can include tetrafluoroethane, difluoromethane, pentafluoroethane and the like.

[0175] In the case where the third heat exchange medium is a liquid phase change material, the third heat exchange medium flows autonomously in the process of phase change, without the need for external driving devices to drive its flow, so that the third cavity 322 can be a closed space structure.

[0176] For example, the third heat exchange medium can change between liquid and gas. At a position of the flow channel structure 31 with a higher temperature, the third heat exchange medium in the third cavity 322 can change from liquid to gas and absorb heat in the process. Then, the third heat exchange medium in gas can flow to a position of the third cavity 322 with a lower temperature, which corresponds to a position of the flow channel structure 31 with a lower temperature. According to the temperature relationship between the third heat exchange medium in the corresponding position of the third cavity 322 and the flow channel structure 31, the third heat exchange medium can release heat to the flow channel structure 31 to increase the temperature of the corresponding position of the flow channel structure 31, or the flow channel structure 31 can transfer less heat to the third heat exchange medium, so that the temperature of the corresponding position of the flow channel structure 31 increases or the temperature decreases to a smaller extent, thereby reducing the temperature difference between different positions of the flow channel structure 31.

[0177] In this embodiment, the third heat exchange medium is a phase change material. The phase change material can absorb heat at a position with a higher temperature and change phase, and the phase changed phase change material can flow to a position with a lower temperature and release heat, so as to achieve the effect of making the temperature distribution of the refrigerant heat exchange assembly 30 more uniform.

[0178] In some embodiments, the third cavity 322 is a circulating space structure, so that the third heat exchange medium can flow in the third cavity 322.

[0179] The circulating space structure refers to a space structure with a certain path and connected at the head and tail. The circulating space structure can be a strip-shaped space structure connected at the head and tail. The third cavity 322 can be a circular ring-shaped space structure, a square ring-shaped space structure, or other shapes of circulating space structures. At this time, the third cavity 322 can be a closed circulating space structure, or the third cavity 322 can be connected with other structures outside the third cavity 322, for example, an external driving device (such as a water pump) can be arranged outside the third cavity 322, and the third cavity 322 is connected with the external driving device to drive the third heat exchange medium to flow in the third cavity 322.

[0180] The third heat exchange medium can flow in the third cavity 322, that is, the third heat exchange medium can flow in the third cavity 322 in a certain direction and circulate at the head and tail in the third cavity 322. In the process of flowing of the third heat exchange medium, the third heat exchange medium can exchange heat with the first plate body 311 to absorb heat from the flow channel structure 31 or release heat to the flow channel structure 31.

[0181] The third heat exchange medium can be circulated in the third cavity 322 by the force generated by the change of heat, or can be driven by an external driving device (such as a water pump) to circulate in the third cavity 322. The third heat exchange medium can include refrigerant, such as tetrafluoroethane, difluoromethane, pentafluoroethane, etc., or can include coolant, such as water, ethylene glycol solution, etc.

[0182] At a position of the flow channel structure 31 with a higher temperature, the third heat exchange medium can absorb more heat and cause the temperature of the corresponding position of the flow channel structure 31 to decrease more. At a position of the flow channel structure 31 with a lower temperature, according to the temperature relationship between the third heat exchange medium in the corresponding position of the flow channel structure 31 and the third cavity 322, the third heat exchange medium can absorb a small amount of heat from the flow channel structure 31, or can release heat to the flow channel structure 31, so that the temperature of the corresponding position of the flow channel structure 31 decreases less or increases, thereby reducing the temperature difference between different positions of the flow channel structure 31.

[0183] In this embodiment, the third heat exchange medium is circulated in the third cavity 322, and the third heat exchange medium can transport heat from a high-temperature position to a low-temperature position during circulation, thereby achieving the effect of making the temperature distribution of the refrigerant heat exchange assembly 30 more uniform.

[0184] Reference Figure 9 , Figure 10 In some embodiments, the temperature equalizing structure 32 further includes a fourth cavity 323 provided on the first plate body 311, the fourth cavity 323 is not in communication with the first cavity 313, and the fourth cavity 323 contains a fourth heat exchange medium configured to be able to flow in the fourth cavity 323.

[0185] The fourth cavity 323 refers to a space structure formed on the first plate body 311. The fourth cavity 323 can be formed inside the first plate body 311 or between the first plate body 311 and the second plate body 312. The fourth cavity 323 can be a cylindrical space structure, a prismatic space structure, a strip-shaped space structure, or a space structure of other shapes. For example, when the first cavity 313 is formed by bending or deforming the first plate body 311 away from the second plate body 312, the third cavity 322 can also include a space formed by bending or deforming the first plate body 311 away from the second plate body 312 and covering by the second plate body 312.

[0186] Different from the first cavity 313, the fourth cavity 323 contains the fourth heat exchange medium, which is mainly used for heat exchange with the first heat exchange medium in the first cavity 313 to adjust the temperature distribution of different positions inside the first cavity 313.

[0187] The fourth heat exchange medium refers to a heat exchange medium contained in the fourth cavity 323. The fourth heat exchange medium can include a liquid medium, a gaseous medium, a solid-liquid mixed medium, etc. The material of the fourth heat exchange medium can include a refrigerant, for example, the fourth heat exchange medium can include tetrafluoroethane, difluoromethane, pentafluoroethane, etc. The material of the fourth heat exchange medium can also include a cooling liquid, for example, the fourth heat exchange medium can include water, ethylene glycol solution, etc.

[0188] The fourth heat exchange medium can flow in the fourth cavity 323 to play a role in carrying and adjusting heat. In the part of the flow channel structure 31 with a higher temperature, the fourth heat exchange medium in the fourth cavity 323 exchanges more heat with the corresponding part of the first plate body 311, so that the temperature of the corresponding part of the flow channel structure 31 decreases greatly, and at this time, the fourth heat exchange medium carries more heat. Then, the fourth heat exchange medium flows to the position corresponding to the part of the flow channel structure 31 with a lower temperature. According to the temperature difference between the fourth heat exchange medium and the corresponding flow channel structure 31, the fourth heat exchange medium can release heat to the flow channel structure 31 to increase the temperature of the corresponding part of the flow channel structure 31, or the flow channel structure 31 can transfer less heat to the fourth heat exchange medium, so that the temperature of the corresponding part of the flow channel structure 31 increases or the temperature decrease amplitude is smaller, thereby reducing the temperature difference between different parts of the flow channel structure 31.

[0189] In the case where the fourth cavity 323 is arranged on the first plate body 311, the third plate body 321 can not be arranged, and at this time, the space occupation of the refrigerant heat exchange assembly 30 is smaller. In the case where the fourth cavity 323 is arranged on the first plate body 311, the third plate body 321 can also be arranged, and the third cavity 322 can be formed between the third plate body 321 and the first plate body 311, at this time, the third heat exchange medium and the fourth heat exchange medium can be used for uniform temperature treatment of the flow channel structure 31. In the case where the fourth cavity 323 is arranged on the first plate body 311, the third plate body 321 can also be arranged, and the second cavity 3211 can be arranged in the third plate body 321, at this time, the second heat exchange medium and the fourth heat exchange medium can be used for uniform temperature treatment of the flow channel structure 31. In the case where the fourth cavity 323 is arranged on the first plate body 311, the third cavity 322 and the second cavity 3211 can also be arranged at the same time, at this time, the second heat exchange medium, the third heat exchange medium and the fourth heat exchange medium can be used for uniform temperature treatment of the flow channel structure 31.

[0190] In the embodiment, the fourth cavity 323 is arranged, and the fourth heat exchange medium is allowed to flow in the fourth cavity 323, so as to carry and adjust the heat distribution of the refrigerant heat exchange assembly 30 by the flowing third heat exchange medium, thereby achieving the effect of making the temperature distribution of the refrigerant heat exchange assembly 30 more uniform; meanwhile, the first cavity 313 and the fourth cavity 323 are arranged between the first plate body 311 and the second plate body 312, which can also reduce the space occupation of the refrigerant heat exchange assembly 30.

[0191] Reference Figure 9 、 Figure 10 In some embodiments, the first plate body 311 is provided with a second flow channel groove 3112 on the side facing the second plate body 312, and the second flow channel groove 3112 is not in communication with the first cavity 313; the second plate body 312 covers the second flow channel groove 3112 and forms the fourth cavity 323.

[0192] The second flow channel groove 3112 refers to a groove-shaped structure formed on the first plate body 311, and the fourth heat exchange medium can flow in the second flow channel groove 3112; in the plane perpendicular to the direction in which the fourth heat exchange medium flows in the second flow channel groove 3112, the cross-sectional shape of the second flow channel groove 3112 can be square, trapezoidal, semicircular or other shapes; the second flow channel groove 3112 can extend along a straight line, or can be curved and in the shape of a snake, a spiral or other shapes; the second flow channel groove 3112 can be formed by deforming the first plate body 311, for example, the second flow channel groove 3112 can be formed by stamping, bending or other processes on the first plate body 311, or the second flow channel groove 3112 can be formed by connecting a structural member to the first plate body 311, for example, a plurality of straight plates or bent plates can be connected to the first plate body 311, and the second flow channel groove 3112 can be formed between adjacent two straight plates or bent plates.

[0193] The second flow channel groove 3112 is arranged on the side of the first plate body 311 facing the battery monomer 20, and the second plate body 312 is also arranged on the side of the first plate body 311 facing the battery monomer 20, so that the second plate body 312 can shield the second flow channel groove 3112, at this time, the second plate body 312 and the first plate body 311 can form the fourth cavity 323, and the fourth heat exchange medium can flow in the third flow channel.

[0194] The second flow channel groove 3112 is mainly used to form the fourth cavity 323 for heat exchange between the fourth heat exchange medium and the first heat exchange medium. Therefore, the second flow channel groove 3112 can be arranged adjacent to and equidistant from the first cavity 313 to facilitate heat exchange between the fourth heat exchange medium and the first heat exchange medium. For example, when the first flow channel groove 3111 is in a straight line structure, the second flow channel groove 3112 can be in a straight line structure adjacent to and parallel to the first cavity 313. For example, when the first cavity 313 is in a serpentine structure, the second flow channel groove 3112 can be in a serpentine structure adjacent to the first cavity 313, and each part of the second flow channel groove 3112 is adjacent to the corresponding part of the first cavity 313.

[0195] The fourth cavity 323 is formed by arranging the second flow channel groove 3112 on the first plate body 311 and covering the second plate body 312 on the second flow channel groove 3112. In this way, the fourth heat exchange medium in the fourth cavity 323 can better exchange heat with the second flow channel groove 3112. At the same time, the fourth heat exchange medium can exchange heat with the second plate body 312 and the battery cell 20 through the second plate body 312.

[0196] In some embodiments, the fourth cavity 323 is a closed space structure, and the fourth heat exchange medium is a liquid phase change material.

[0197] The fourth cavity 323 is a closed space structure, that is, the fourth heat exchange medium can flow in the fourth cavity 323, but it is difficult to flow out of the fourth cavity 323.

[0198] The liquid phase change material can include tetrafluoroethane, difluoromethane, pentafluoroethane, etc.

[0199] When the fourth heat exchange medium is a liquid phase change material, the fourth heat exchange medium flows autonomously during phase change without the need for external driving devices to drive its flow. Therefore, the fourth cavity 323 can be a closed space structure.

[0200] For example, the fourth heat exchange medium can change between liquid and gas. At a position of the flow channel structure 31 with a higher temperature, the fourth heat exchange medium in the fourth cavity 323 can change from liquid to gas and absorb heat in the process. Then, the fourth heat exchange medium in gas can flow to a position of the fourth cavity 323 with a lower temperature, which corresponds to a position of the flow channel structure 31 with a lower temperature. According to the temperature relationship between the fourth heat exchange medium in the corresponding position of the fourth cavity 323 and the flow channel structure 31, the fourth heat exchange medium can release heat to the flow channel structure 31 to increase the temperature of the corresponding position of the flow channel structure 31, or the flow channel structure 31 can transfer less heat to the fourth heat exchange medium, so that the temperature of the corresponding position of the flow channel structure 31 increases or the temperature decreases to a smaller extent, thereby reducing the temperature difference between different positions of the flow channel structure 31.

[0201] In this embodiment, the fourth heat exchange medium is a phase change material. The phase change material can absorb heat at a position with a higher temperature and change phase, and the phase changed phase change material can flow to a position with a lower temperature and release heat, so as to achieve the effect of making the temperature distribution of the refrigerant heat exchange assembly 30 more uniform.

[0202] In some embodiments, the fourth cavity 323 is a circulating space structure, so that the fourth heat exchange medium can flow in the fourth cavity 323.

[0203] The circulating space structure refers to a space structure with a certain path and connected at the head and tail. The circulating space structure can be a strip-shaped space structure connected at the head and tail. The fourth cavity 323 can be a circular ring-shaped space structure, a square ring-shaped space structure, or other shapes of circulating space structures. At this time, the fourth cavity 323 can be a closed circulating space structure, or the fourth cavity 323 can be connected with other structures outside the environment, for example, an external driving device (such as a water pump) can be arranged outside the fourth cavity 323, and the fourth cavity 323 is connected with the external driving device to drive the fourth heat exchange medium to flow in the fourth cavity 323.

[0204] The fourth heat exchange medium can flow in the fourth cavity 323, that is, the fourth heat exchange medium can flow in the fourth cavity 323 in a certain direction and circulate at the head and tail in the fourth cavity 323. In the process of flowing of the fourth heat exchange medium, the fourth heat exchange medium can exchange heat with the first plate body 311 to absorb heat from the flow channel structure 31 or release heat to the flow channel structure 31.

[0205] The fourth heat exchange medium can be circulated in the fourth cavity 323 by the force generated by the change of heat, or can be driven by an external driving device (such as a water pump) to circulate in the fourth cavity 323. The fourth heat exchange medium can include a refrigerant, such as tetrafluoroethane, difluoromethane, pentafluoroethane, etc., or can include a coolant, such as water, ethylene glycol solution, etc.

[0206] At a position of the flow channel structure 31 with a higher temperature, the fourth heat exchange medium can absorb more heat and cause the temperature of the corresponding position of the flow channel structure 31 to decrease more. At a position of the flow channel structure 31 with a lower temperature, according to the temperature relationship between the fourth heat exchange medium in the corresponding position of the flow channel structure 31 and the fourth cavity 323, the fourth heat exchange medium can absorb a small amount of heat from the flow channel structure 31, or can release heat to the flow channel structure 31, so that the temperature of the corresponding position of the flow channel structure 31 decreases less or increases, thereby reducing the temperature difference between different positions of the flow channel structure 31.

[0207] In this embodiment, the fourth heat exchange medium is circulated in the fourth cavity 323, and the fourth heat exchange medium can transport heat from a high-temperature position to a low-temperature position during circulation, thereby achieving the effect of making the temperature distribution of the refrigerant heat exchange assembly 30 more uniform.

[0208] Reference Figure 11 、 Figure 12 In some embodiments, the flow channel structure 31 includes a first plate body 311 connected to the box body 10, and the first plate body 311 is provided with a first flow channel groove 3111 on the side facing the battery monomer 20. The uniform temperature structure 32 includes a fourth plate body 324 connected to the side of the first plate body 311 facing the battery monomer 20, the fourth plate body 324 covers the first flow channel groove 3111, and the fourth plate body 324 is a heat-conducting structural member.

[0209] The first plate body 311 refers to a structure in the flow channel structure 31 for carrying the first heat exchange medium, and the first flow channel groove 3111 refers to a groove-shaped structure provided on the first plate body 311. The first heat exchange medium can flow in the first flow channel groove 3111.

[0210] The fourth plate body 324 is used for heat exchange with the first heat exchange medium, that is, the fourth plate body 324 is a heat conduction structure, and the fourth plate body 324 has a certain heat conduction performance. For example, the material of the fourth plate body 324 can include aluminum, copper or other heat conductive materials.

[0211] The fourth plate body 324 is used for heat exchange with the first heat exchange medium, that is, the fourth plate body 324 is a heat conduction structure, and the fourth plate body 324 has a certain heat conduction performance. For example, the material of the fourth plate body 324 can include aluminum, copper or other heat conductive materials.

[0212] Because the first flow channel groove 3111 is arranged on the first plate body 311, and the first heat exchange medium flows in the first flow channel groove 3111, the fourth plate body 324 exchanges heat with the first plate body 311, so as to adjust the temperature of the first heat exchange medium at different positions, thereby reducing the temperature difference of the first heat exchange medium at different positions in the flow channel structure 31.

[0213] At the position of the flow channel structure 31 with a higher temperature, the corresponding position of the fourth plate body 324 exchanges more heat with the first plate body 311, so that the temperature of the corresponding position of the flow channel structure 31 decreases greatly, and the temperature of the corresponding position of the fourth plate body 324 increases. The heat locally increased in the fourth plate body 324 will be dispersed to other positions (for example, positions with a lower temperature) of the fourth plate body 324, and the overall temperature of the fourth plate body 324 increases. At this time, at the position of the flow channel structure 31 with a lower temperature, according to the temperature relationship between the position of the flow channel structure 31 and the corresponding position of the fourth plate body 324, the fourth plate body 324 can release heat to the flow channel structure 31 to increase the temperature of the corresponding position of the flow channel structure 31, and the flow channel structure 31 can transfer heat to the fourth plate body 324, and the heat transferred is less, so that the temperature of the corresponding position of the flow channel structure 31 increases or the temperature decrease amplitude is smaller, so as to reduce the temperature difference of different positions of the flow channel structure 31.

[0214] Because the fourth plate body 324 is arranged on the side of the first plate body 311 facing the battery monomer 20, the fourth plate body 324 can also exchange heat with the battery monomer 20. During the heat exchange between the fourth plate body 324 and the first plate body 311 and the first heat exchange medium, the temperature distribution on the fourth plate body 324 is also relatively uniform. At this time, the fourth plate body 324 can exchange heat with each battery monomer 20 relatively uniformly, so as to reduce the temperature difference between the battery monomers 20.

[0215] In this embodiment, the fourth plate body 324 is arranged to cover the first flow channel groove 3111 and form the flow channel structure 31; the fourth plate body 324 is a heat-conducting structural member to exchange heat with the flow channel structure 31 through the fourth plate body 324, increase the temperature of the position with lower temperature in the flow channel structure 31 through the fourth plate body 324, and decrease the temperature of the position with higher temperature in the flow channel structure 31 through the fourth plate body 324.

[0216] Reference Figure 11 、 Figure 12 In some embodiments, the fourth plate body 324 is provided with a fifth cavity 3241, and the fifth cavity 3241 contains a fifth heat exchange medium configured to flow in the fifth cavity 3241.

[0217] The fifth cavity 3241 refers to a space structure arranged inside the third plate body 321, which can be a prismatic space, a cylindrical space or other space structure; the number of the fifth cavity 3241 can be one, two or more.

[0218] The fifth heat exchange medium refers to a medium capable of exchanging heat with the first heat exchange medium, which can include a liquid medium, a gaseous medium, a solid-liquid mixed medium, etc.; the material of the fifth heat exchange medium can include a refrigerant, for example, the fifth heat exchange medium can include tetrafluoroethane, difluoromethane, pentafluoroethane, etc., and the material of the fifth heat exchange medium can also include a cooling liquid, for example, the fifth heat exchange medium can include water, ethylene glycol solution, etc.

[0219] The fifth heat exchange medium can flow in the fifth cavity 3241 to transport and adjust heat. In the part of the flow channel structure 31 with higher temperature, the fifth heat exchange medium in the fifth cavity 3241 exchanges more heat with the corresponding part of the first plate body 311, so that the temperature of the corresponding part of the flow channel structure 31 decreases greatly, and at this time the fifth heat exchange medium carries more heat; then, the fifth heat exchange medium flows to the position corresponding to the part of the flow channel structure 31 with lower temperature, and the fifth heat exchange medium releases heat to the flow channel structure 31 to increase the temperature of the corresponding part of the flow channel structure 31, and the flow channel structure 31 can also transfer less heat to the fifth heat exchange medium, so that the temperature of the corresponding part of the flow channel structure 31 increases or the temperature decrease amplitude is smaller, thereby reducing the temperature difference between different parts of the flow channel structure 31.

[0220] In addition to being capable of exchanging heat with the first heat exchange medium, the fifth heat exchange medium is also capable of exchanging heat with the battery monomer 20 to control the temperature of the battery monomer 20.

[0221] In the embodiment, the fourth plate body 324 is arranged to cover the first flow channel groove 3111 and form the flow channel structure 31; meanwhile, the fifth cavity 3241 is arranged in the fourth plate body 324, and the flowable fifth heat exchange medium is arranged in the fifth cavity 3241, so as to transport and adjust the heat distribution of the refrigerant heat exchange assembly 30 through the flow of the fifth heat exchange medium, thereby achieving the effect of making the temperature distribution of the refrigerant heat exchange assembly 30 more uniform; the arrangement can not only achieve the effect of temperature equalization, but also reduce the space occupation of the refrigerant heat exchange assembly 30.

[0222] Reference Figure 11 , Figure 12 In some embodiments, the fifth cavity 3241 is provided with a second reinforcing member 3242 connected to the fourth plate body 324.

[0223] The second reinforcing member 3242 refers to a reinforcing structure arranged in the fifth cavity 3241. The second reinforcing member 3242 can be a plate structure, a columnar structure, or other shaped structures. The second reinforcing member 3242 can be a square plate structure, a trapezoidal plate structure, a prism structure, a cylindrical structure, or other shaped structures. The number of the second reinforcing member 3242 can be one, two, or more.

[0224] The second reinforcing member 3242 can be connected to the surface of the fifth cavity 3241 facing or away from the first plate body 311. The second reinforcing member 3242 can also be connected to other surfaces of the fifth cavity 3241. For example, the two ends of the second reinforcing member 3242 are respectively connected to the surfaces of the fifth cavity 3241 facing and away from the first plate body 311.

[0225] Since the fifth cavity 3241 is arranged in the fourth plate body 324, the strength of the fourth plate body 324 is relatively low, and the fourth plate body 324 has a risk of deformation. The deformation of the fourth plate body 324 can easily affect the flow of the second heat exchange medium in the fifth cavity 3241, and further affect the temperature equalization effect of the second heat exchange medium. Accordingly, the second reinforcing member 3242 is arranged to improve the strength of the fourth plate body 324, reduce the risk of deformation of the fourth plate body 324, and improve the support performance of the fourth plate body 324.

[0226] In the embodiment, the second reinforcing member 3242 is arranged in the fifth cavity 3241 to improve the strength of the fourth plate body 324, so that the fourth plate body 324 can better support the battery monomer 20.

[0227] Reference Figure 2 , Figure 4 , Figure 13In some embodiments, the box 10 comprises a first box 11 and a second box 12 connected to the first box 11, the first box 11 and the second box 12 are buckled to each other and form a containing cavity 101, and the battery cell 20 is contained in the containing cavity 101.

[0228] The first box 11 and the second box 12 respectively refer to the partial structure of the box 10, the first box 11 and the second box 12 can be buckled to each other, so that the containing cavity 101 is formed inside the box 10 to contain the battery cell 20. The second box 12 can be a hollow structure with one end open, and the first box 11 can be a plate structure, which covers the open side of the second box 12 to make the first box 11 and the second box 12 jointly define the containing cavity 101; the first box 11 and the second box 12 can also be hollow structures with one side open, and the open side of the first box 11 covers the open side of the second box 12. The box 10 formed by the first box 11 and the second box 12 can be a cylinder, a prism or other shapes, and the containing cavity 101 can be a cylindrical space, a prismatic space or a space structure with other shapes, and the shape of the containing cavity 101 can also be set according to the shape of the first box 11 and the second box 12.

[0229] The present embodiment provides some specific structures of the box 10, so that the battery cell 20 can be contained in the box 10.

[0230] Reference Figure 13 In some embodiments, the second box 12 comprises a frame structure 121 and a bottom structure 122, the bottom structure 122 is connected to one side of the frame structure 121, and the first box 11 is connected to the side of the frame structure 121 away from the bottom structure 122, the first box 11, the frame structure 121 and the bottom structure 122 enclose the containing cavity 101; the refrigerant heat exchange assembly 30 is connected to the side of the bottom structure 122 facing the battery cell 20, or the refrigerant heat exchange assembly 30 is connected to the side of the bottom structure 122 away from the battery cell 20.

[0231] The bottom structure 122 refers to the partial structure of the second box 12, and the bottom structure 122 is opposite to the first box 11, which can be used to bear the battery cell 20 or other structures in the box 10; the bottom structure 122 can be a plate structure, or a box structure or other structures; the bottom structure 122 can comprise a plate body or other structural members; the shape of the bottom structure 122 can be square, circular or other shapes.

[0232] The side frame structure 121 refers to a side structure in the second box body 12. The side frame structure 121 can include a plurality of side beams connected in sequence to form a square or other shape of the side frame structure 121. The side frame structure 121 can be provided through in the height direction of the battery device 100, that is, the side frame structure 121 has two openings in the height direction of the battery device 100. The opposite sides of the side frame structure 121 are connected to the first box body 11 and the bottom structure 122, respectively. That is, the first box body 11 and the bottom structure 122 respectively close the two openings of the side frame structure 121 on the opposite sides of the side frame structure 121. At this time, the first box body 11, the bottom structure 122 and the side frame structure 121 form the accommodation cavity 101 to accommodate the battery monomer 20.

[0233] The refrigerant heat exchange assembly 30 can be arranged on the side of the bottom structure 122 facing the battery monomer 20. That is, the refrigerant heat exchange assembly 30 can be located in the accommodation cavity 101. At this time, the refrigerant heat exchange assembly 30 can directly contact the battery monomer 20 to control the temperature of each battery monomer 20.

[0234] The refrigerant heat exchange assembly 30 can also be arranged on the side of the bottom structure 122 away from the battery monomer 20. That is, the refrigerant heat exchange assembly 30 can also be located outside the accommodation cavity 101. At this time, the refrigerant heat exchange assembly 30 indirectly contacts the battery monomer 20 through the bottom structure 122 to indirectly control the temperature of each battery monomer 20.

[0235] The present embodiment provides some installation positions of the refrigerant heat exchange assembly 30 on the box body 10, so that the refrigerant heat exchange assembly 30 can exchange heat with the battery monomer 20.

[0236] Reference Figure 4 In some embodiments, the second box body 12 includes the side frame structure 121 and the refrigerant heat exchange assembly 30. The refrigerant heat exchange assembly 30 is connected to one side of the side frame structure 121. The first box body 11 is connected to the side of the side frame structure 121 away from the refrigerant heat exchange assembly 30. The first box body 11, the side frame structure 121 and the refrigerant heat exchange assembly 30 form the accommodation cavity 101.

[0237] The side frame structure 121 refers to a side structure in the second box body 12. The side frame structure 121 can include a plurality of side beams connected in sequence to form a square or other shape of the side frame structure 121. The side frame structure 121 can be provided through in the height direction of the battery device 100, that is, the side frame structure 121 has two openings in the height direction of the battery device 100. The opposite sides of the side frame structure 121 are connected to the first box body 11 and the bottom structure 122, respectively. That is, the first box body 11 and the bottom structure 122 respectively close the two openings of the side frame structure 121 on the opposite sides of the side frame structure 121. At this time, the first box body 11, the bottom structure 122 and the side frame structure 121 form the accommodation cavity 101 to accommodate the battery monomer 20.

[0238] In the embodiment, the refrigerant heat exchange assembly 30 can exchange heat with the battery monomer 20 to control the temperature of the battery monomer 20, and the refrigerant heat exchange assembly 30 also serves as the bottom structure 122 of the second box 12 to support the battery monomer 20.

[0239] In some embodiments, the battery device 100 includes a box 10, a battery monomer 20, and a refrigerant heat exchange assembly 30.

[0240] The box 10 includes a first box 11 and a second box 12, which are buckled to each other and form a containing cavity 101, and the battery monomer 20 is contained in the containing cavity 101.

[0241] The second box 12 includes a frame structure 121 extending through the height direction of the battery device 100, the first box 11 is connected to one side of the frame structure 121, and the refrigerant heat exchange assembly 30 is connected to the other side of the frame structure 121, at this time, the first box 11, the frame structure 121, and the refrigerant heat exchange assembly 30 form the containing cavity 101, and the refrigerant heat exchange assembly 30 is used to support the battery monomer 20.

[0242] The refrigerant heat exchange assembly 30 includes a flow channel structure 31 and a temperature equalization structure 32, the flow channel structure 31 includes a first plate body 311 and a second plate body 312, the first plate body 311 is provided with a first flow channel groove 3111 on the side facing the second plate body 312, the first flow channel groove 3111 is deformed through the first plate body 311 in the direction away from the second plate body 312, and the second plate body 312 is connected to the first plate body 311 and covers the first flow channel groove 3111 to form the flow channel structure 31, and a first heat exchange medium flows through the first flow channel groove 3111.

[0243] The temperature equalization structure 32 includes a fifth cavity 3241, the first plate body 311 is further provided with a second flow channel groove 3112 on the side facing the second plate body 312, the second plate body 312 covers the second flow channel groove 3112 and forms the closed fifth cavity 3241, and the fifth cavity 3241 contains a fifth heat exchange medium, and the fifth heat exchange medium is a phase change material.

[0244] In a second aspect, the embodiments of the present application also provide a refrigerant heat exchange assembly 30, which includes a flow channel structure 31 and a temperature equalization structure 32, the flow channel structure 31 is used for the first heat exchange medium to flow through to exchange heat with the battery monomer 20, the temperature equalization structure 32 is arranged adjacent to the flow channel structure 31, and the temperature equalization structure 32 is used to exchange heat with the flow channel structure 31 to make the overall temperature of the flow channel structure 31 consistent.

[0245] The flow channel structure 31 refers to a structure for passing the heat exchange medium in the refrigerant heat exchange assembly 30. The flow channel structure 31 can include a pipe structure, which can be in a serpentine shape, a spiral shape, or other shapes. The flow channel structure 31 can also include a channel structure arranged in a base member, which can be in a plate structure, a block structure, or other structures. The base member can be in a rectangular plate shape, a prism shape, a cylindrical shape, or other shapes. The channel structure formed in the base member can be in a serpentine channel, a spiral channel, or other shapes.

[0246] The flow channel structure 31 can be connected to the box body 10. The flow channel structure 31 can be fixedly connected to the box body 10 by welding, bonding, or other methods. Alternatively, the flow channel structure 31 can be detachably connected to the box body 10 by clamping, screwing, or other methods. The flow channel structure 31 can be directly connected to the box body 10 or indirectly connected to the box body 10 through an intermediate structure. The flow channel structure 31 can be located inside the box body 10 or outside the box body 10. The flow channel structure 31 can be located at the bottom of each battery monomer 20 or between adjacent two battery monomers 20. The material of the flow channel structure 31 can include metal, plastic, or other materials.

[0247] The heat exchange medium flowing in the flow channel structure 31 is a first heat exchange medium. The first heat exchange medium can include a liquid medium, a gaseous medium, a solid-liquid mixed medium, or the like. The first heat exchange medium can include a refrigerant, such as tetrafluoroethane, difluoromethane, pentafluoroethane, or the like.

[0248] The uniform temperature structure 32 refers to a structure in the refrigerant heat exchange assembly 30 that is mainly used for heat exchange with the flow channel structure 31, and heat can be dispersed and transferred in the uniform temperature structure 32. The uniform temperature structure 32 can include a structure member with heat conduction performance. In this case, the uniform temperature structure 32 can not only exchange heat with the flow channel structure 31, but also can uniformly disperse and arrange heat in the uniform temperature structure 32. The uniform temperature structure 32 can also include a base member and a heat exchange medium flowing in the base member. The flowing heat exchange medium can exchange heat with the flow channel structure 31 and carry heat to flow, so as to adjust the temperature difference of different parts of the flow channel structure 31.

[0249] The uniform temperature structure 32 is arranged adjacent to the flow channel structure 31. The uniform temperature structure 32 can be directly connected to the flow channel structure 31, or indirectly connected to the flow channel structure 31 through other structures. According to the specific structure of the uniform temperature structure 32, the uniform temperature structure 32 can be fixedly connected to the flow channel structure 31 by welding, bonding, or other methods. Alternatively, the uniform temperature structure 32 can be detachably connected to the flow channel structure 31 by screwing, clamping, or other methods. The uniform temperature structure 32 can also be arranged inside the flow channel structure 31.

[0250] The uniform temperature structure 32 can be arranged on the side of the flow channel structure 31 facing the battery monomer 20, or on the side of the flow channel structure 31 away from the battery monomer 20, or inside the flow channel structure 31 or other positions; the uniform temperature structure 32 can exchange heat only with the flow channel structure 31, or exchange heat with both the flow channel structure 31 and the battery monomer 20.

[0251] At the position of the flow channel structure 31 with a higher temperature, the uniform temperature structure 32 exchanges more heat with the corresponding position of the flow channel structure 31, so that the temperature of the corresponding position of the flow channel structure 31 decreases greatly, and the temperature of the corresponding position of the uniform temperature structure 32 increases; the heat locally increased by the uniform temperature structure 32 will be dispersed to other positions (e.g. positions with a lower temperature) of the uniform temperature structure 32, and the overall temperature of the uniform temperature structure 32 increases; at this time, at the position of the flow channel structure 31 with a lower temperature, according to the temperature relationship between the position of the flow channel structure 31 and the corresponding position of the uniform temperature structure 32, the uniform temperature structure 32 can release heat to the flow channel structure 31 to increase the temperature of the corresponding position of the flow channel structure 31, or the flow channel structure 31 can transfer heat to the uniform temperature structure 32, and the heat transferred is less, so that the temperature of the corresponding position of the flow channel structure 31 increases or the temperature decrease is smaller, thereby reducing the temperature difference between different positions of the flow channel structure 31. That is, the heat exchanged between different positions of the uniform temperature structure 32 and the flow channel structure 31 is different, and the temperature difference between different positions of the flow channel structure 31 is adjusted, the temperature difference between different positions of the flow channel structure 31 is reduced, and the uniformity of the temperature of the flow channel structure 31 is improved.

[0252] In this embodiment, the refrigerant heat exchange assembly 30 includes the flow channel structure 31 and the uniform temperature structure 32, and exchanges heat with the flow channel structure 31 through the uniform temperature structure 32, so as to adjust the temperature of different positions of the flow channel structure 31 through the uniform temperature structure 32, thereby reducing the temperature difference between different positions of the refrigerant heat exchange assembly 30, making the temperature of different positions of the refrigerant heat exchange assembly 30 more uniform, and improving the stability of the battery device 100 and reducing the safety risk of the battery device 100.

[0253] In a third aspect, the embodiments of the present application also provide a power utilization device including the battery device 100 provided by some embodiments of the first aspect, or the refrigerant heat exchange assembly 30 provided by some embodiments of the second aspect.

[0254] In the power utilization device, the temperature of each position inside the battery device 100 is more uniform, and the temperature of the battery monomer 20 at different positions is also more uniform, so as to reduce the occurrence of local overheating of the battery device 100, and improve the service life and reduce the use risk of the battery device 100.

[0255] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the claims and the specification of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The application relates to a battery pack, comprising: a box body; a battery cell accommodated in the box body; a refrigerant heat exchange assembly for heat exchange with the battery cell, the refrigerant heat exchange assembly comprising a flow channel structure and a uniform temperature structure, the flow channel structure being used for the flow of a first heat exchange medium to exchange heat with the battery cell, and the uniform temperature structure being arranged adjacent to the flow channel structure and used for heat exchange with the flow channel structure.

2. The battery device according to claim 1, characterized by The flow channel structure comprises a first plate body and a second plate body connected to the first plate body, and a first cavity is formed between the first plate and the second plate body, and the first cavity is used for the flow of the first heat exchange medium; The uniform temperature structure is arranged on a side of the second plate body away from the battery cell.

3. The battery device of claim 2, wherein, The uniform temperature structure comprises a third plate body connected to a side of the first plate body away from the second plate body, and the third plate body is configured to exchange heat with the first plate body; The third plate body is a heat conduction structure.

4. The battery device of claim 3, wherein A second cavity is arranged in the third plate body, and a second heat exchange medium is accommodated in the second cavity, and the second heat exchange medium is configured to flow in the second cavity.

5. The battery device of claim 4, wherein, The second cavity is a closed space structure, and the second heat exchange medium is a liquid phase change material.

6. The battery device of claim 4, wherein The second cavity is a circulating space structure, so that the second heat exchange medium can flow in the second cavity.

7. The battery device according to any one of claims 4 to 6, wherein A first reinforcing member connected to the third plate body is arranged in the second cavity.

8. The battery device according to any one of claims 3 to 7, characterized by, The third plate body and the first plate body enclose a third cavity, and a third heat exchange medium is accommodated in the third cavity, and the third heat exchange medium is configured to flow in the third cavity.

9. The battery device of claim 8, wherein, The first plate body is recessed in a direction away from the second plate body and protrudes in a direction toward the third plate body, so as to form a first flow channel groove on a side of the first plate body toward the second plate body and form a second flow channel groove on a side of the first plate body toward the third plate body; The second plate body is connected to the first plate body and covers the first flow channel groove to form the first cavity; The third plate body is connected to the first plate body and covers the second flow channel groove to form the third cavity.

10. The battery device according to claim 8 or 9, characterized by The third cavity is a closed space structure, and the third heat exchange medium is a liquid phase change material.

11. The battery device according to claim 8 or 9, characterized by The third cavity is a circulating space structure, so that the third heat exchange medium can flow in the third cavity.

12. The battery device of any one of claims 2-11, wherein, The uniform temperature structure further comprises a fourth cavity arranged on the first plate body, the fourth cavity is not communicated with the first cavity, the fourth cavity accommodates a fourth heat exchange medium, and the fourth heat exchange medium is configured to flow in the fourth cavity.

13. The battery device of claim 12, wherein, A second flow channel groove is arranged on a side of the first plate body toward the second plate body, and the second flow channel groove is not communicated with the first cavity; The second plate body covers the second flow channel groove to form the fourth cavity.

14. The battery device according to claim 12 or 13, characterized by, The fourth cavity is a closed space structure, and the fourth heat exchange medium is a liquid phase change material.

15. The battery device according to claim 12 or 13, characterized by The fourth cavity is a circulating space structure, so that the fourth heat exchange medium can flow in the fourth cavity.

16. The battery device of claim 1, wherein, The flow channel structure includes a first plate connected to the housing, and a first flow channel groove is provided on the side of the first plate facing the battery cell; The temperature equalization structure includes a fourth plate connected to the side of the first plate facing the battery cell, the fourth plate covering the first flow channel groove, and the fourth plate being a heat-conducting structural component.

17. The battery device of claim 16, wherein, The fourth plate covers the first flow channel groove, and the fourth plate has a fifth cavity inside, which contains a fifth heat exchange medium, which is configured to flow within the fifth cavity.

18. The battery device of claim 17, wherein, The fifth cavity is provided with a second reinforcing member connected to the fourth plate.

19. The battery device of any one of claims 1-18, wherein, The housing includes a first housing and a second housing connected to the first housing. The first housing and the second housing are interlocked to form a receiving cavity, and the battery cell is housed in the receiving cavity.

20. The battery device of claim 19, wherein, The second housing includes a side frame structure and a bottom structure. The bottom structure is connected to one side of the side frame structure, and the first housing is connected to the side of the side frame structure opposite to the bottom structure. The first housing, the side frame structure, and the bottom structure form the receiving cavity. The refrigerant heat exchange assembly is connected to the side of the bottom structure facing the battery cell, or the refrigerant heat exchange assembly is connected to the side of the bottom structure away from the battery cell.

21. The battery device of claim 19, wherein, The second housing includes a frame structure and the refrigerant heat exchange component. The refrigerant heat exchange component is connected to one side of the frame structure, and the first housing is connected to the side of the frame structure opposite to the refrigerant heat exchange component. The first housing, the frame structure, and the refrigerant heat exchange component form the receiving cavity.

22. A refrigerant heat exchange assembly comprising: It includes a flow channel structure and a temperature equalization structure. The flow channel structure is used to allow the first heat exchange medium to flow through it. The temperature equalization structure is arranged adjacent to the flow channel structure and is used to exchange heat with the flow channel structure.

23. An electrical device, comprising: Includes the battery device as described in any one of claims 1-21, or the refrigerant heat exchange assembly as described in claim 22.

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