Refrigerant heat exchange component, battery device and electric device

Abstract

The utility model is applicable to the technical field of batteries, and provides a refrigerant heat exchange component, a battery device and a power utilization device, and the battery device (100) comprises a box body (10); the battery monomer assembly (20) is arranged in the box body (10); the refrigerant heat exchange component (30) is connected to the box body (10), the refrigerant heat exchange component comprises a first plate body (31) and a second plate body (32) which are stacked and connected, and a heat exchange flow channel (34) allowing a refrigerant to flow is formed between the first plate body (31) and the second plate body (32); a gas containing part (35) is arranged in the first plate body (31), and the gas containing part (35) is provided with an opening facing the second plate body (32); the air containing part (35) and the heat exchange flow channel (34) are arranged at intervals in the extending direction of the refrigerant heat exchange component (30). The battery device and the power utilization device provided by the embodiment of the utility model have relatively high reliability.

Description

[0001] This application claims priority to the Chinese Patent Application No. 202420907842.4, filed on April 28, 2024, and entitled "Heat Exchange Device, Battery and Electric Device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

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

[0003] In recent years, new energy vehicles have made a leap in development. In the field of electric vehicles, batteries, as the power source of electric vehicles, play an irreplaceable important role. Among them, the battery as a core component of new energy vehicles has a high requirement in reliability. SUMMARY

[0004] Therefore, the present application provides a refrigerant heat exchange component, a battery device and an electric device, which have high reliability.

[0005] The first aspect of the present application provides a battery device, comprising: a box body; a battery monomer assembly arranged in the box body; and a refrigerant heat exchange component connected to the box body, the refrigerant heat exchange component comprising a first plate body and a second plate body stacked and connected, and a heat exchange flow channel for refrigerant flow being formed between the first plate body and the second plate body; the first plate body is provided with a gas containing portion, the gas containing portion has an opening facing the second plate body; and the gas containing portion and the heat exchange flow channel are arranged in a spaced manner along the extension direction of the refrigerant heat exchange component.

[0006] The battery device provided by the present application comprises a box body, a battery monomer assembly and a refrigerant heat exchange component. The refrigerant heat exchange component has a functional area and a non-functional area. The refrigerant heat exchange component is provided with a heat exchange flow channel. The refrigerant in the heat exchange flow channel can exchange heat with the battery monomer assembly to adjust the temperature of the battery monomer assembly, thereby solving the problem that the performance of the battery device is affected due to the excessively high temperature of the battery monomer assembly. In addition, the first plate body is provided with a gas containing portion. During the process of connecting the first plate body and the second plate body to each other, the gas containing portion can accommodate the gas that is not timely discharged between the first plate body and the second plate body, thereby reducing the risk of gas trapping. In turn, the problems of local bulging, cracking and flow channel cross-flow of the refrigerant heat exchange component caused by gas trapping are reduced, the production yield of the refrigerant heat exchange component is improved, and the reliability of the refrigerant heat exchange component and the reliability of the battery device are improved.

[0007] In some embodiments, the heat exchange flow channel is recessed in the first plate body.

[0008] By adopting the technical scheme, the heat exchange flow channel and the gas containing part are both made on the first plate body, the second plate body can be a flat plate structure, and the manufacturing mode of the refrigerant heat exchange component is simple and convenient, and the manufacturing efficiency is higher.

[0009] In some embodiments, the gas containing part includes a gas containing groove, and the gas containing groove is recessed on the side of the first plate body facing the second plate body.

[0010] By adopting the technical scheme, the gas containing groove not only can contain gas, but also can improve the structural strength of the refrigerant heat exchange component.

[0011] In some embodiments, the width of the gas containing groove is 5mm-20mm, and / or the depth of the gas containing groove is 2mm-3mm.

[0012] By setting the size of the gas containing groove to meet the above conditions, the gas containing groove can contain more gas to reduce the risk of gas trapping.

[0013] In some embodiments, the width of the heat exchange flow channel is 5mm-20mm, and / or the depth of the heat exchange flow channel is 2mm-3mm.

[0014] By setting the heat exchange flow channel to meet the above conditions, the heat exchange flow channel can have enough flow of refrigerant and the working pressure will not be too large.

[0015] In some embodiments, the gas containing part includes an exhaust hole, and the exhaust hole penetrates the first plate body.

[0016] By adopting the technical scheme, the exhaust hole not only can contain gas, but also can exhaust gas, reducing the risk of gas trapping in the refrigerant heat exchange component.

[0017] In some embodiments, the exhaust hole is a circular hole, and the hole diameter of the exhaust hole is 3mm-15mm.

[0018] By adopting the technical scheme, the exhaust hole can effectively exhaust gas, and at the same time, the size of the exhaust hole can adapt to the size of the refrigerant heat exchange component, and the exhaust hole has little effect on the structural strength of the refrigerant heat exchange component.

[0019] In some embodiments, the gas containing part includes at least one of the gas containing groove and the exhaust hole.

[0020] By adopting the technical scheme, the gas containing part can be a gas containing groove or an exhaust hole, and the gas containing part can contain gas that is not timely exhausted between the first plate body and the second plate body, reducing the risk of gas trapping in the refrigerant heat exchange component.

[0021] In some embodiments, the first plate body is provided with a flow guide groove, the second plate body is welded and connected with the first plate body in at least part of the area outside the flow guide groove and the gas containing part, and the flow guide groove and the second plate body enclose the heat exchange flow channel.

[0022] By adopting the technical scheme, the connection stability between the first plate body and the second plate body is good, and the structural strength of the refrigerant heat exchange component is high; the refrigerant heat exchange component provided in the embodiment of the application is internally provided with the air containing part, which can solve the problem of trapped air.

[0023] In some embodiments, the refrigerant heat exchange component has a functional area and a non-functional area located outside the functional area, the heat exchange flow channel is at least partially located in the functional area, the functional area is used for heat exchange with the battery monomer assembly, and the air containing part is located in the non-functional area.

[0024] By adopting the technical scheme, the air containing part is arranged in the non-functional area, which can effectively reduce the risk of trapped air.

[0025] In some embodiments, the battery device includes a plurality of battery monomer assemblies, each battery monomer assembly includes a plurality of battery monomers arranged in a first direction, and the plurality of battery monomer assemblies are arranged in a second direction, the first direction intersects the second direction; the refrigerant heat exchange component is located on one side of the battery monomer assembly in a third direction, the functional area is arranged opposite to the plurality of battery monomer assemblies, and the third direction is perpendicular to the first direction and the second direction.

[0026] By adopting the technical scheme, the refrigerant heat exchange component is arranged opposite to the plurality of battery monomer assemblies, the refrigerant heat exchange component can exchange heat with the plurality of battery monomer assemblies through the functional area, and the heat management effect of the battery device is good.

[0027] In some embodiments, the heat exchange flow channel includes a plurality of shunt channels arranged in parallel, each shunt channel includes a branch flow channel and a sub-flow channel connected to the branch flow channel; the non-functional area includes a peripheral area and a shunt area, the peripheral area is located on the outer circumferential side of the heat exchange flow channel, the plurality of branch flow channels are arranged in the shunt area, and the sub-flow channel is at least partially located in the functional area; the number of air containing parts is a plurality, the plurality of air containing parts include a first air containing part arranged in the peripheral area and a second air containing part arranged in the shunt area, and the second air containing part is arranged between adjacent branch flow channels.

[0028] By adopting the technical scheme, each shunt channel can independently circulate the refrigerant, and the heat exchange effect of the entire refrigerant heat exchange component is not affected by the blockage of a certain part of the heat exchange flow channel; by arranging the first air containing part and the second air containing part, the risk of trapped air in the peripheral area and the shunt area of the refrigerant heat exchange component is reduced, and the reliability of the refrigerant heat exchange component is further improved.

[0029] In some embodiments, the number of the first air containing part and the second air containing part is a plurality, and the plurality of first air containing parts are arranged in at least one row along the edge of the refrigerant heat exchange component.

[0030] By adopting the technical scheme, the plurality of first gas containing portions can be adapted to the area of the peripheral region, and the risk of gas stagnation in the peripheral region can be effectively reduced; the plurality of second gas containing portions can be adapted to the area between the branch flow channels, and the risk of gas stagnation in the branch flow region can be effectively reduced.

[0031] In some embodiments, any two adjacent first gas containing portions have a first distance, and the first distance is less than or equal to 35 mm, and optionally, the first distance ranges from 5 mm to 20 mm.

[0032] In some embodiments, two second gas containing portions adjacent to each other between two branch flow channels have a second distance, and the second distance is less than or equal to 35 mm, and optionally, the second distance ranges from 5 mm to 20 mm.

[0033] By adopting the technical scheme, the first distance between the two adjacent first gas containing portions and / or the second distance between the two adjacent second gas containing portions is less than or equal to 35 mm, which can effectively reduce the risk of gas stagnation in the refrigerant heat exchange component. By setting the first distance and / or the second distance to be greater than or equal to 5 mm, the manufacturing difficulty of the first plate body can be reduced, and by setting the first distance and / or the second distance to be less than or equal to 20 mm, the risk of gas stagnation can be better reduced.

[0034] In some embodiments, each branch flow channel includes an inflow branch flow channel and a return flow branch flow channel, the inflow branch flow channel, the sub-flow channel and the return flow branch flow channel are sequentially communicated, each sub-flow channel is arranged in a bending loop and forms a heat exchange region, and the heat exchange region is arranged opposite to at least one group of battery monomer assemblies.

[0035] By adopting the technical scheme, each sub-flow channel can perform heat exchange on one or more battery monomer assemblies, heat management of the one or more battery monomer assemblies is achieved, if an abnormality occurs in a certain branch flow channel due to blockage or the like, other sub-flow channels can be normally used, the risk of heat management failure of the battery device is reduced, and the reliability of the battery device is improved.

[0036] In some embodiments, the plurality of sub-flow channels are sequentially arranged along a second direction, and the plurality of sub-flow channels are symmetrically arranged relative to a center line of the refrigerant heat exchange component in the second direction.

[0037] By adopting the technical scheme, the sub-flow channels on both sides of the refrigerant heat exchange component are evenly distributed, the temperature distribution difference of the battery device in the symmetric region can be controlled within a design range, and the uniformity of the heat management effect is better.

[0038] In some embodiments, the sub-flow channel includes an inflow sub-section, a return flow sub-section, and an intermediate sub-section between the inflow sub-section and the return flow sub-section.

[0039] In the two adjacent sub-flow channels, the backflow sub-section of one of the sub-flow channels is arranged adjacent to the inflow sub-section of the other sub-flow channel in the second direction.

[0040] By adopting the technical scheme, the refrigerant heat exchange component can balance the temperature of the heat exchange flow channel by arranging the inflow sub-section with low temperature adjacent to the backflow sub-section with high temperature, thereby reducing the temperature difference of the refrigerant heat exchange component.

[0041] In some embodiments, the projection of the plurality of battery cell assemblies onto the refrigerant heat exchange component falls within the functional area; the backflow sub-sections of the plurality of sub-flow channels respectively extend to opposite sides of the refrigerant heat exchange component along the second direction.

[0042] In the second direction, the projection of at least one backflow sub-section does not coincide with the battery cell assembly.

[0043] By adopting the technical scheme, the backflow section close to the edge is staggered with the battery cell assembly, which can reduce the influence of the overheated area on the temperature of the battery cell assembly.

[0044] In some embodiments, the refrigerant in the heat exchange flow channel is a phase change working medium.

[0045] By adopting the technical scheme, the refrigerant heat exchange component can be a direct cooling plate, which has the advantage of high heat exchange efficiency. At the same time, the direct cooling plate has high requirements for structural strength and welding performance. The refrigerant heat exchange component provided in the embodiments of the present application is provided with an air containing portion, which can greatly reduce the risk of welding air containing, and improve the production yield of the refrigerant heat exchange component.

[0046] In some embodiments, the box body includes a box body and an upper cover, and the two ends of the box body are respectively provided with openings. The upper cover and the refrigerant heat exchange component cover the openings at the two ends of the box body, and the refrigerant heat exchange component is bonded to the battery cell assembly by heat-conducting glue.

[0047] By adopting the technical scheme, the refrigerant heat exchange component is arranged at the bottom of the box body and the battery cell assembly, and the refrigerant heat exchange component can be used as the bottom plate of the box body, which simplifies the structure of the battery device and helps to save vehicle space. The refrigerant heat exchange component is bonded to the battery cell assembly by heat-conducting glue, so that the refrigerant heat exchange component can directly exchange heat with the battery cell assembly, which has high heat exchange efficiency and high heat exchange effect, and effectively improves the reliability of the battery device.

[0048] The embodiments of the second aspect of the present application provide a refrigerant heat exchange component, which comprises a first plate body and a second plate body stacked and connected, and a heat exchange flow channel for refrigerant flow is formed between the first plate body and the second plate body; the first plate body is provided with an air containing portion, and the air containing portion has an opening facing the second plate body; along the extension direction of the refrigerant heat exchange component, the air containing portion is arranged spaced apart from the heat exchange flow channel.

[0049] The embodiment of the third aspect of the present application provides a power utilization device, which comprises the battery device provided in the first aspect or the refrigerant heat exchange component provided in the second aspect, and the battery device is used for providing electric energy.

[0050] The above description is only a summary of the technical scheme of the present application. In order to make the technical means of the present application more clear and understandable, 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

[0051] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or conventional technical description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative labor.

[0052] Figure 1 The structural schematic diagram of a vehicle provided in an embodiment of the present application is shown in the figure;

[0053] Figure 2 The structural schematic diagram of a battery device provided in an embodiment of the present application is shown in the figure;

[0054] Figure 3 The three-dimensional exploded schematic diagram of a battery monomer provided in an embodiment of the present application is shown in the figure;

[0055] Figure 4 The three-dimensional exploded schematic diagram of a refrigerant heat exchange component provided in an embodiment of the present application is shown in the figure;

[0056] Figure 5 The structural schematic diagram of a refrigerant heat exchange component and a battery monomer assembly provided in an embodiment of the present application is shown in the figure;

[0057] Figure 6 The structural schematic diagram of a first plate body in a refrigerant heat exchange component provided in an embodiment of the present application is shown in the figure;

[0058] Figure 7 The structural schematic diagram of a first plate body in a refrigerant heat exchange component provided in an embodiment of the present application is shown in the figure; Figure 6 The local enlarged view of one side is shown in the figure;

[0059] Figure 8 The structural schematic diagram of a first plate body in a refrigerant heat exchange component provided in another embodiment of the present application is shown in the figure;

[0060] Figure 9 The structural schematic diagram of a first plate body in a refrigerant heat exchange component provided in another embodiment of the present application is shown in the figure;

[0061] The meaning of the mark in the figure is: The meaning of the mark in the figure is:

[0062] 1000, vehicle; 100, battery device; 200, controller; 300, motor;

[0063] 10, box body; 11, upper cover; 12, box body;

[0064] 20, battery cell assembly; 21, battery cell; 211, shell; 212, end cover; 213, electrode assembly; 214, electrode terminal; 215, pressure relief mechanism;

[0065] 30, refrigerant heat exchange component; 31, first plate body; 311, flow guide groove; 32, second plate body; 33, heat exchange joint;

[0066] 301, functional area;

[0067] 302, non-functional area; 3021, peripheral area; 3022, shunt area;

[0068] 34, heat exchange flow channel;

[0069] 341, shunt channel;

[0070] 3411, branch channel; 3412, sub-flow channel; 34111, inflow branch channel; 34112, backflow branch channel; 34121, inflow part; 34122, backflow sub-section; 34123, intermediate sub-section;

[0071] 35, gas containing part; 351, first gas containing part; 352, second gas containing part;

[0072] 40, bottom guard plate. DETAILED DESCRIPTION

[0073] The embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0074] 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.

[0075] In the description of the embodiments of the present application, the technical terms "first", "second", and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly and specifically limited.

[0076] Reference herein to "embodiments" means that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiments, 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.

[0077] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, 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 associated objects before and after it.

[0078] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups).

[0079] 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 mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0080] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0081] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc. The embodiments of the present application are not limited in this regard.

[0082] The 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 can include a plurality of battery cells connected in series, in parallel, or in a mixed connection through a busbar component.

[0083] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells.

[0084] As an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0085] In some embodiments, the battery apparatus can be a battery pack including a box and one or more battery cell assemblies accommodated in the box.

[0086] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box by fixing the battery module in the box.

[0087] As an example, the battery cell assembly can also be accommodated in the box by directly fixing a plurality of battery cells in the box.

[0088] In recent years, new energy vehicles have made a great leap forward. In the field of electric vehicles, batteries play an irreplaceable important role as the power source of electric vehicles. Among them, the battery as a core component of new energy vehicles has a high requirement in reliability.

[0089] Fast charging is a mainstream solution for new energy vehicles to achieve fast energy replenishment. In the implementation process, many challenges are encountered. A large amount of heat is generated in the battery during fast charging, which can cause the internal temperature of the battery to rise sharply, thereby affecting the performance and service life of the battery and affecting the reliability of the battery.

[0090] To this end, some batteries are provided with a refrigerant heat exchange component for heat management of the battery. The refrigerant heat exchange component includes two opposite plate bodies and the two plate bodies together form flow channels for refrigerant flow to adjust the temperature inside the battery through the refrigerant. However, there may be a problem of trapped gas during the connection of the two plate bodies, i.e. the gas between the two plate bodies fails to be discharged in time and is trapped inside the refrigerant heat exchange component. The flow channels are prone to bulging near the trapped gas, which causes the flow channels to be torn along the trapped gas, resulting in the problem of flow communication between the flow channels and causing the refrigerant to fail to circulate normally, thereby causing the refrigerant heat exchange component to fail and the battery heat management system to fail, affecting the reliability of the battery operation.

[0091] Based on the above considerations, in order to improve the reliability of the battery, one or more embodiments of the present application provide a battery device, comprising a box body, a battery monomer assembly and a refrigerant heat exchange component, the refrigerant heat exchange component comprising a first plate body and a second plate body stacked and connected, a heat exchange flow channel for refrigerant flow being formed between the first plate body and the second plate body; the first plate body is provided with a gas containing portion, the gas containing portion has an opening facing the second plate body, and the gas containing portion is spaced apart from the heat exchange flow channel.

[0092] In the above technical solution, the refrigerant heat exchange component is provided with a heat exchange flow channel, and the refrigerant in the heat exchange flow channel can exchange heat with the battery monomer assembly to adjust the temperature of the battery monomer assembly, solving the problem that the performance of the battery device is affected due to the excessively high temperature of the battery monomer assembly; and the first plate body is provided with a gas containing portion, the gas containing portion has an opening facing the second plate body, so that during the connection of the first plate body and the second plate body, the gas containing portion can accommodate the gas between the first plate body and the second plate body, reducing the risk of trapped gas, and further reducing the risk of refrigerant heat exchange component bulging, flow channel flow, etc. caused by trapped gas, improving the reliability of the refrigerant heat exchange component and the reliability of the battery device.

[0093] The technical solutions described in the embodiments of the present application are applicable to various battery monomer using electric devices, for example, mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, the spacecraft includes airplanes, rockets, space shuttles and spacecraft, etc. The following embodiments are described taking a vehicle as an example for convenience of description.

[0094] Please refer to 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 automobile, a gas automobile, or a new energy automobile, which can be a pure electric automobile, a hybrid automobile, or a range extended automobile, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, the controller 200 being used to control the battery device 100 to supply power to the motor 300, for example, for the working power demand of the vehicle 1000 during starting, navigation, and driving.

[0095] In some embodiments of the present application, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0096] Please refer to Figure 2 and Figure 3 The battery device 100 includes a box body 10 and a battery monomer assembly 20. The box body 10 includes an upper cover 11 and a box body 12, the upper cover 11 and the box body 12 are mutually covered, and the upper cover 11 and the box body 12 jointly define a containing space for containing battery monomers 21. The box body 12 can be a hollow structure with one end open, and the upper cover 11 can be a plate structure, which is covered on the open side of the box body 12 to jointly define the containing space with the box body 12; the upper cover 11 and the box body 12 can also be hollow structures with one side open, and the open side of the upper cover 11 is covered on the open side of the box body 12. Of course, the box body 10 formed by the upper cover 11 and the box body 12 can have various shapes, such as a cylinder, a cuboid, etc.

[0097] The battery monomer assembly 20 is usually formed by arranging a plurality of battery monomers 21. The battery monomer 21 is the smallest unit of the battery device 100, and the battery monomer 21 includes a shell 211, an end cover 212, an electrode assembly 213, and other functional components.

[0098] The end cover 212 refers to a component that covers the opening of the shell 211 to isolate the internal environment of the battery cell 21 from the external environment. Without limitation, the shape of the end cover 212 can be adapted to the shape of the shell 211 to fit the shell 211. Optionally, the end cover 212 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 212 is not easily deformed when subjected to extrusion collision, so that the battery cell 21 can have higher structural strength, and the use reliability can also be improved. The end cover 212 can be provided with functional components such as electrode terminals 214, pressure relief mechanisms 215, etc. The electrode terminals 214 can be used to electrically connect with the electrode assembly 213 for outputting or inputting the electrical energy of the battery cell 21. In some embodiments, the pressure relief mechanism 215 is used to release the internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold value. The material of the end cover 212 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. In some embodiments, an insulating member can also be provided on the inner side of the end cover 212 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0099] The shell 211 is a component used to fit the end cover 212 to form the internal environment of the battery cell 21, wherein the formed internal environment can be used to accommodate the electrode assembly 213, the electrolyte and other components. The shell 211 and the end cover 212 can be independent components, and an opening can be provided on the shell 211, and the end cover 212 is covered on the opening to form the internal environment of the battery cell 21. Without limitation, the end cover 212 and the shell 211 can also be integrated, specifically, the end cover 212 and the shell 211 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 211, the end cover 212 is covered on the shell 211. The shell 211 can be various shapes and various sizes, such as cuboid, cylinder, hexagonal prism, etc. Specifically, the shape of the shell 211 can be determined according to the specific shape and size of the electrode assembly 213. The material of the shell 211 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.

[0100] The electrode assembly 213 is a component in which an electrochemical reaction occurs in the battery cell 21. One or more electrode assemblies 213 can be contained within the case 211. The electrode assembly 213 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 213, 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 device 100, the positive electrode active material and the negative electrode active material react with an electrolyte, and the tabs connect the electrode terminal 214 to form a current loop. In some embodiments, the battery cell 21 is provided with a pressure relief mechanism 215 on one side, which refers to an element or component that is actuated to release internal pressure when the internal pressure or temperature of the battery cell 21 reaches a predetermined threshold.

[0101] Please refer to Figure 2 , Figure 4 and Figure 5 , the first aspect of the embodiments of the present application proposes a battery device 100, comprising a box body 10, a battery cell assembly 20 and a refrigerant heat exchange component 30, the battery cell assembly 20 is arranged in the box body 10, the refrigerant heat exchange component 30 is connected to the box body 10, the refrigerant heat exchange component 30 comprises a first plate body 31 and a second plate body 32 which are stacked and connected, and a heat exchange flow channel 34 for refrigerant flow is formed between the first plate body 31 and the second plate body 32; the first plate body 31 is provided with a gas containing portion 35, the gas containing portion 35 has an opening facing the second plate body 32; along the extension direction of the refrigerant heat exchange component 30, the gas containing portion 35 is arranged in a spaced manner with the heat exchange flow channel 34.

[0102] The box body 10 is used to accommodate the battery cell assembly 20, and the box body 10 comprises an upper cover 11 and a box body 12, and the upper cover 11 and the box body 12 enclose an accommodation space.

[0103] The battery cell assembly 20 comprises a plurality of battery cells 21, and the battery cell assembly 20 comprises a plurality of battery cells 21 arranged in a first direction X in an example, and a plurality of battery cell assemblies 20 are arranged in a second direction Y in sequence, so that the battery cells 21 are arranged in an array, and the second direction Y intersects the first direction X. Optionally, the first direction X can be the length direction of the box body 10, and the second direction Y can be the width direction of the box body 10; in other embodiments, the first direction X and / or the second direction Y can also be inclined to intersect the length direction of the box body 10.

[0104] The refrigerant heat exchange component 30 is a component for containing refrigerant to regulate the temperature of the battery cell assembly 20. The battery cell assembly 20 generates heat during the circulation process, and the battery cell assembly 20 can be cooled by the refrigerant heat exchange component 30. The refrigerant heat exchange component 30 can also be referred to as a cooling piece, a cooling system, a cold plate, etc. Of course, in some cases, the refrigerant heat exchange component can also be used to heat the battery cell assembly 20, which will not be described here.

[0105] The refrigerant heat exchange component 30 can be directly connected to the battery cell assembly 20 or indirectly connected to the battery cell assembly 20, as long as it can exchange heat with the battery cell assembly 20. In some embodiments, the refrigerant heat exchange component 30 is connected to the bottom of the box body 10. For example, the box body 10 includes an upper cover 11 and a box body 12, and the refrigerant heat exchange component 30 is connected to the side of the box body 12 away from the upper cover 11. The refrigerant heat exchange component 30 can be arranged inside the box body 10, outside the box body 10, or as a lower cover of the box body 12, in which case the box body 12 has two open ends, and the upper cover 11 and the refrigerant heat exchange component 30 are arranged on the two sides of the box body 12, respectively.

[0106] The refrigerant heat exchange component 30 includes a first plate body 31 and a second plate body 32. The first plate body 31 and the second plate body 32 can have the same or similar size, and the material of the first plate body 31 and the second plate body 32 can be metal, plastic, composite material or other materials. The first plate body 31 and the second plate body 32 can be connected by welding, or by adhesion, clamping, fastening, etc.

[0107] The first plate body 31 and the second plate body 32 form a heat exchange flow channel 34 for the refrigerant to flow. For example, the first plate body 31 is machined with an unsealed heat exchange flow channel 34, and the first plate body 31 and the second plate body 32 are connected to seal the heat exchange flow channel 34.

[0108] The heat exchange flow channel 34 can be connected to a compressor, a water pump, a fan, a condenser or other heat exchange equipment through a pipe, etc., so that the refrigerant flows to other heat exchange equipment to cool down and carry out the heat inside the battery.

[0109] The first plate body 31 is provided with a gas containing portion 35 for containing the gas between the first plate body 31 and the second plate body 32. The gas containing portion 35 can be a hole, a groove or other structure with an internal space. The first plate body 31 can be arranged on the side of the refrigerant heat exchange component 30 away from the battery cell assembly 20, or on the side of the refrigerant heat exchange component 30 close to the battery cell assembly 20 in other embodiments. Alternatively, the first plate body 31 and the second plate body 32 are both provided with a gas containing portion 35.

[0110] The gas containing part 35 is arranged in the extension direction of the refrigerant heat exchange component 30 and is spaced from the heat exchange flow channel 34, so that the gas containing part 35 and the heat exchange flow channel 34 are isolated from each other on the refrigerant heat exchange component 30, that is, they are not in communication with each other. The extension direction of the refrigerant heat exchange component 30 can be the length or width direction of the refrigerant heat exchange component 30. The gas containing part 35 and the heat exchange flow channel 34 are arranged in the extension direction of the refrigerant heat exchange component 30, and since the gas containing part 35 is located in the first plate body 31, the gas containing part 35 and the heat exchange flow channel 34 are arranged in the surface of the first plate body 31.

[0111] In the process of manufacturing the refrigerant heat exchange component 30, the first plate body 31 and the second plate body 32 are stacked and fixedly connected by welding, bonding or the like. Some gas may not be discharged in time between the first plate body 31 and the second plate body 32, and the undischarged gas may be trapped inside the refrigerant heat exchange component 30 to cause problems such as porosity and cracking, and the heat exchange flow channel 34 is prone to bulging near the trapped gas, which may cause the flow channel to tear along the trapped gas. The refrigerant heat exchange component 30 provided in the embodiments of the present application includes a gas containing part 35, which can contain the gas that is not discharged in time during the connection process of the first plate body 31 and the second plate body 32, so that the gas is not easy to gather in the area where the first plate body 31 and the second plate body 32 are closely attached to each other, thereby reducing the risk of causing problems such as bulging, porosity and cracking in the refrigerant heat exchange component 30, and further reducing the risk of flow channel cross flow caused by trapped gas.

[0112] The battery device 100 provided in the embodiments of the present application includes a box body 10, a battery monomer assembly 20 and a refrigerant heat exchange component 30. The refrigerant heat exchange component 30 has a functional area 301 and a non-functional area 302, and is provided with a heat exchange flow channel 34. The heat exchange flow channel 34 can exchange heat with the battery monomer assembly 20 to adjust the temperature of the battery monomer assembly 20, thereby solving the problem of affecting the performance of the battery device due to the excessively high temperature of the battery monomer assembly 20. In addition, the first plate body 31 is provided with a gas containing part 35. During the process of connecting the first plate body 31 and the second plate body 32 to each other, the gas containing part 35 can contain the gas that is not discharged in time between the first plate body 31 and the second plate body 32, thereby reducing the risk of causing problems such as local bulging, cracking and flow channel cross flow of the refrigerant heat exchange component 30 caused by trapped gas, improving the manufacturing yield of the refrigerant heat exchange component 30, and improving the reliability of the refrigerant heat exchange component 30 and the reliability of the battery device.

[0113] Please refer to Figure 4 to Figure 9 In some embodiments, the heat exchange flow channel 34 is recessed in the first plate body 31.

[0114] The heat exchange channel 34 is recessed in the first plate body 31, that is, the heat exchange channel 34 is a groove structure recessed in the side of the first plate body 31 facing the second plate body 32. After the first plate body 31 and the second plate body 32 are connected, the groove structure and the second plate body 32 jointly form the heat exchange channel 34.

[0115] The gas containing part 35 and the heat exchange channel 34 are both provided on the first plate body 31. During manufacturing, the gas containing part 35 and the heat exchange channel 34 can be manufactured together on the first plate body 31, thereby improving manufacturing efficiency. For example, the gas containing part 35 and the heat exchange channel 34 are manufactured on the first plate body 31 by stamping.

[0116] By using the above technical solution, the gas containing part 35 and the heat exchange channel 34 are both manufactured on the first plate body 31, and the second plate body 32 can be a flat plate structure. The manufacturing method of the refrigerant heat exchange component 30 is simple and convenient, and the manufacturing efficiency is high.

[0117] Please refer to Figure 4 and Figure 5 In some embodiments, the gas containing part 35 includes a gas containing groove recessed in the side of the first plate body 31 facing the second plate body 32.

[0118] The gas containing groove is recessed in the side of the first plate body 31 facing the second plate body 32, and the slot of the gas containing groove is the opening of the gas containing part 35. The gas containing groove can be in the shape of a strip or an arc, and the gas containing groove can also be shaped to at least part of the heat exchange channel 34. The gas containing groove is a false channel. The gas containing groove and the second plate body 32 form a gas containing cavity to contain the gas not discharged between the first plate body 31 and the second plate body 32. In addition, the gas containing groove can be manufactured by stamping or the like, which not only can contain gas, but also can improve the structural strength of the refrigerant heat exchange component 30.

[0119] Please refer to Figure 6 and Figure 7 In some embodiments, the width of the gas containing groove is 5mm-20mm, and / or the depth of the gas containing groove is 2mm-3mm.

[0120] The gas containing groove can also be referred to as a false channel, and the gas containing groove does not need to flow through the refrigerant. The width W2 of the gas containing groove can be equal to the width W1 of the heat exchange channel 34, or can not be equal, which is not limited here.

[0121] The width W2 of the gas containing groove is 5mm-20mm, for example, the width W2 of the gas containing groove can be 5mm, 8mm, 10mm, 15mm, 20mm, etc. The width of the gas containing groove is greater than or equal to 5mm, which can make the gas containing groove contain more gas; the width of the gas containing groove is less than or equal to 20mm, which can adapt to the overall size of the refrigerant heat exchange component 30.

[0122] The depth of the air accommodating groove is equal to or different from the depth of the heat exchange flow channel 34. Optionally, the depth of the air accommodating groove is 2 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 3 mm, etc.

[0123] By setting the depth of the air accommodating groove to be greater than or equal to 2 mm, the air accommodating groove can accommodate more gas. By setting the depth of the air accommodating groove to be less than or equal to 3 mm, the overall size of the refrigerant heat exchange component 30 can be adapted. In addition, the air accommodating groove is recessed on the side of the first plate body 31 facing the second plate body 32. If the air accommodating groove is made on the first plate body 31 by stamping, the bottom of the air accommodating groove will be protruding relative to the first plate body 31. By setting the depth of the air accommodating groove to be less than or equal to 3 mm, the height of the air accommodating groove protruding outward can be controlled, the overall size of the refrigerant heat exchange component 30 can be reduced, and the installation requirements can be met.

[0124] By setting the size of the air accommodating groove to meet the above conditions, the air accommodating groove can accommodate more gas and adapt to the size of the refrigerant heat exchange component 30, thereby reducing the risk of gas trapping.

[0125] Please refer to Figure 6 and Figure 7 In some embodiments, the width of the heat exchange flow channel is 5 mm to 20 mm, and / or the depth of the heat exchange flow channel is 2 mm to 3 mm.

[0126] The width W1 of the heat exchange flow channel 34 refers to the width of the refrigerant flow path in the heat exchange flow channel 34, and the width of the heat exchange flow channel 34 affects the flow cross-sectional area of the heat exchange flow channel 34. The heat exchange flow channel 34 can include branch flow channels and sub-flow channels, and the width of each of the branch flow channels and the sub-flow channels is 5 mm to 20 mm.

[0127] In some embodiments, the width W1 of the heat exchange flow channel 34 can be 5 mm, 8 mm, 10 mm, 15 mm, 20 mm, etc. The width of the heat exchange flow channel 34 is greater than or equal to 5 mm, so that the heat exchange flow channel 34 has sufficient refrigerant flow. The width of the heat exchange flow channel 34 is less than or equal to 20 mm, so that the working pressure of the refrigerant is not too large to affect the structural reliability of the refrigerant heat exchange component 30.

[0128] In addition, the width of the heat exchange flow channel 34 and the air accommodating groove can be equal or similar, and the depth of the heat exchange flow channel 34 and the air accommodating groove can also be equal or similar, so as to adapt to the size of the refrigerant heat exchange component 30 and facilitate manufacturing.

[0129] Please refer to Figure 8 In some embodiments, the air accommodating portion 35 includes an air exhaust hole, and the air exhaust hole penetrates the first plate body 31.

[0130] The air exhaust hole is a through hole penetrating the first plate body 31, and the air exhaust hole can be a circular hole, a square hole, an oval hole, a strip-shaped hole, etc.

[0131] The vent hole can not only accommodate gas, but also discharge gas between the first plate body 31 and the second plate body 32 during the connection of the first plate body 31 and the second plate body 32.

[0132] By setting the gas accommodating part 35 as a vent hole, not only can gas be accommodated, but also gas can be discharged, thereby reducing the risk of gas entrapment in the refrigerant heat exchange component 30.

[0133] As shown in some embodiments, the vent hole is a circular hole, and the diameter of the vent hole is 3mm-15mm. Figure 8 The vent hole is a circular through hole, and the diameters of the vent holes can be equal or unequal. For example, a vent hole with a larger diameter is arranged in a region where the first plate body 31 and the second plate body 32 have a larger connection area.

[0134] The diameter of the vent hole can be 3mm, 5mm, 6mm, 8mm, 10mm, 15mm, etc. The diameter of the vent hole is greater than or equal to 3mm, so that the vent hole can effectively discharge gas. The diameter of the vent hole is less than or equal to 15mm, on the one hand, the size of the vent hole can adapt to the size of the refrigerant heat exchange component 30, and on the other hand, the vent hole has less influence on the structural strength of the refrigerant heat exchange component 30.

[0135] Please refer to

[0136] In some embodiments, the gas accommodating part 35 includes at least one of a gas accommodating groove and a vent hole. Figure 6 to Figure 9 The refrigerant heat exchange component 30 can include a plurality of gas accommodating parts 35, and each gas accommodating part 35 can be one of a gas accommodating groove and a vent hole. As shown in some embodiments, the plurality of gas accommodating parts 35 are all gas accommodating grooves, as shown in some embodiments, the plurality of gas accommodating parts 35 are all vent holes, and as shown in some embodiments, the plurality of gas accommodating parts 35 include a plurality of gas accommodating grooves and a plurality of vent holes.

[0137] Figure 6 Figure 8 Figure 9

[0138] The refrigerant heat exchange component 30 can flexibly select a gas accommodating groove or a vent hole in different regions. Optionally, the refrigerant heat exchange component 30 can preferentially arrange a gas accommodating groove in a region where space is allowed, and arrange a vent hole in a certain region. For example, the refrigerant heat exchange component 30 can be arranged with a vent hole in a region in contact with the cabinet 10 or the bottom guard plate, so that the refrigerant heat exchange component 30 can maintain flatness in the contact region, and the arrangement of the vent hole does not affect the contact of the refrigerant heat exchange component 30 with the cabinet 10 or the bottom guard plate.

[0139] By adopting the above technical solutions, the gas accommodating part 35 can be a gas accommodating groove or a vent hole, and the structure of the gas accommodating part 35 can be selected according to the size and installation requirements of the refrigerant heat exchange component 30, so as to improve the welding yield of the refrigerant heat exchange component 30.​​​​

[0140] In some embodiments, the first plate body 31 is provided with a flow guide groove 311, and the second plate body 32 is welded to the first plate body 31 at least in a region outside the flow guide groove 311 and the gas containing portion 35, and the flow guide groove 311 and the second plate body 32 form the heat exchange flow channel 34.

[0141] In the manufacturing of the refrigerant heat exchange component 30, the flow guide groove 311 and the gas containing portion 35 are first processed on the first plate body 31, and then the first plate body 31 and the second plate body 32 are welded together. Optionally, the first plate body 31 and the second plate body 32 can be welded together by brazing. The first plate body 31 and the second plate body 32 can be welded together in all or part of the region outside the flow guide groove 311 and the gas containing portion 35 to form a sealed refrigerant heat exchange component 30. During the welding process, the gas containing portion 35 can contain and / or discharge the gas that is not timely discharged between the first plate body 31 and the second plate body 32, thereby reducing the risk of gas entrapment.

[0142] By welding the first plate body 31 and the second plate body 32 together, the connection between the first plate body 31 and the second plate body 32 is stable, and the structural strength of the refrigerant heat exchange component 30 is high. The refrigerant heat exchange component 30 provided in the embodiments of the present application is provided with a gas containing portion 35, which can solve the problem of gas entrapment during welding, improve the welding yield of the refrigerant heat exchange component 30, and reduce the manufacturing cost of the refrigerant heat exchange component 30.

[0143] Please refer to Figure 4 to Figure 6 In some embodiments, the refrigerant heat exchange component 30 has a functional region 301 and a non-functional region 302 outside the functional region 301, and the heat exchange flow channel 34 is at least partially arranged in the functional region 301, the functional region 301 is used for heat exchange with the battery monomer assembly 20, and the gas containing portion 35 is arranged in the non-functional region 302.

[0144] The functional region 301 is a region for heat exchange with the battery monomer assembly 20. It can be understood that the functional region 301 is arranged opposite to the battery monomer assembly 20, and the functional region 301 can directly or indirectly contact the battery monomer assembly 20 for heat exchange. The non-functional region 302 is arranged outside the functional region 301, and the non-functional region 302 does not need to exchange heat with the battery monomer assembly 20. The non-functional region 302 can be arranged on one side or multiple sides of the functional region 301, for example, the non-functional region 302 is arranged on the outer circumferential side of the functional region 301, and the first plate body 31 and the second plate body 32 are connected to each other in the non-functional region 302 to form a sealed refrigerant heat exchange component 30 and close the heat exchange flow channel 34.

[0145] The heat exchange flow channel 34 is at least partially arranged in the functional area 301, and the part of the heat exchange flow channel 34 arranged in the functional area 301 is used for heat exchange with the battery monomer assembly 20. The heat exchange flow channel 34 can also have a part arranged in the non-functional area 302, for example, the port of the heat exchange flow channel 34 is arranged in the non-functional area 302, and the heat exchange flow channel 34 extends from the port to the functional area 301.

[0146] Since the heat exchange flow channel 34 is arranged in the functional area 301 and has a high distribution density, the functional area 301 can not be provided with the gas containing part 35. It can be understood that if the functional area 301 also has a region where the first plate body 31 and the second plate body 32 are connected with a large area, the functional area 301 can also be provided with the gas containing part 35.

[0147] The heat exchange flow channel 34 is at least partially arranged in the functional area 301, and it can be understood that in the functional area 301, the first plate body 31 and the second plate body 32 are connected to each other in the region other than the heat exchange flow channel 34. The gas containing part 35 is arranged in the non-functional area 302, and in the non-functional area 302, the first plate body 31 and the second plate body 32 are connected to each other in at least part of the region other than the gas containing part 35 and the heat exchange flow channel 34.

[0148] The first plate body and the second plate body 32 can have a region with a large connection area in the non-functional area 301, which can cause gas trapping. By arranging the gas containing part 35 in the non-functional area 302, the risk of gas trapping can be effectively reduced.

[0149] Please refer to Figure 4 to Figure 6 In some embodiments, the battery device 100 includes a plurality of battery monomer assemblies 20, each of which includes a plurality of battery monomers 21 arranged in a first direction X, and the plurality of battery monomer assemblies 20 are arranged in a second direction Y. The refrigerant heat exchange component 30 is located on one side of the battery monomer assembly 20 along a third direction Z, the functional area 301 is arranged opposite to the plurality of battery monomer assemblies 20, and the third direction Z is perpendicular to the first direction X and the second direction Y.

[0150] The battery monomer assembly 20 includes a plurality of battery monomers 21 arranged in a first direction X, and a plurality of battery monomer assemblies 20 are arranged in a second direction Y, so that the battery monomers 21 are arranged in an array, and the second direction Y intersects the first direction X. Optionally, the first direction X can be the length direction of the box body 10, and the second direction Y can be the width direction. In other embodiments, the first direction X and / or the second direction Y can also be a direction obliquely intersecting the length direction of the box body 10.

[0151] The refrigerant heat exchange component 30 is located on one side of the battery monomer 21 along the third direction Z, and the third direction Z is the height direction of the box body 10. After the battery device is installed in the power consumption device, the refrigerant heat exchange component 30 can be located below the battery monomer assembly 20.

[0152] The functional area 301 is arranged opposite to the plurality of battery cell assemblies 20 at the same time, so that the refrigerant heat exchange component 30 can exchange heat with the plurality of battery cell assemblies 20 through the functional area 301, and the thermal management effect of the battery device is better.

[0153] Optionally, the orthographic projection of the plurality of battery cell assemblies 20 towards the refrigerant heat exchange component 30 coincides with the functional area 301, and the functional area 301 is the area opposite to the plurality of battery cell assemblies 20. In other embodiments, the orthographic projection of the plurality of battery cell assemblies 20 towards the refrigerant heat exchange component 30 can also not completely coincide with the functional area 301, for example, the orthographic projection of the plurality of battery cell assemblies 20 towards the refrigerant heat exchange component 30 falls within the functional area 301, and the edge of the functional area 301 is located outside the plurality of battery cell assemblies 20.

[0154] By adopting the above technical solution, the refrigerant heat exchange component 30 is opposite to the plurality of battery cell assemblies 20 at the same time, so that the refrigerant heat exchange component 30 can exchange heat with the plurality of battery cell assemblies 20 through the functional area 301, and the thermal management effect of the battery device 100 is better.

[0155] Please refer to Figure 6 and Figure 7 In some embodiments, the heat exchange flow channel 34 includes a plurality of parallelly arranged branch flow channels 341, the branch flow channel 341 includes a branch flow channel 3411 and a sub-flow channel 3412 connected to the branch flow channel 3411; the non-functional area 302 includes a peripheral area 3021 and a branch area 3022, the peripheral area 3021 is arranged at the outer circumferential side of the heat exchange flow channel 34, the plurality of branch flow channels 3411 are arranged at the branch area 3022 in a spaced manner, and the sub-flow channel 3412 is at least partially arranged in the functional area 301; the number of the gas containing portions 35 is a plurality, and the plurality of gas containing portions 35 include a first gas containing portion 351 arranged in the peripheral area 3021 and a second gas containing portion 352 arranged in the branch area 3022, and the second gas containing portion 352 is arranged between adjacent branch flow channels 3411.

[0156] For the convenience of understanding, Figure 6 In FIG. 3, the functional area 301, the peripheral area 3021 and the branch area 3022 are separated by dashed lines. The branch area 3022 is arranged at one side of the functional area 301, and the peripheral area 3021 surrounds the branch area 3022 and the circumferential side of the functional area 301.

[0157] The plurality of branch flow channels 341 are arranged in parallel, so that the plurality of branch flow channels 341 can independently circulate refrigerant. The refrigerant heat exchange component 30 has a flow channel inlet and a flow channel outlet, and each branch flow channel 341 is connected to the flow channel inlet and the flow channel outlet. In some embodiments, the refrigerant heat exchange component 30 further comprises a heat exchange joint 33 connected to at least one of the first plate body 31 and the second plate body 32, the heat exchange joint 33 being in communication with the flow channel inlet and the flow channel outlet, and the heat exchange joint 33 being used to connect the refrigerant heat exchange component 30 to other heat exchange equipment to allow refrigerant to flow in and out.

[0158] Each branch flow channel 341 comprises a sub-flow channel 3412 connected to a branch flow channel 3411, and the plurality of branch flow channels 341 are arranged at intervals in the distribution area 3022, so that the plurality of branch flow channels 341 can distribute the refrigerant entering the refrigerant heat exchange component 30 from the flow channel inlet and converge the refrigerant in the plurality of sub-flow channels; and the sub-flow channels 3412 are arranged in the functional area 301 to exchange heat with the battery cell assembly 20.

[0159] The plurality of sub-flow channels 3412 of the plurality of branch flow channels 341 are arranged in the functional area 301, and the plurality of sub-flow channels 3412 are arranged densely, so that the risk of gas trapping is small. Optionally, the sub-flow channels 3412 extend along the second direction Y, and each sub-flow channel 3412 can be bent once or multiple times.

[0160] The plurality of gas containing portions 35 comprises a first gas containing portion 351 and a second gas containing portion 352, the first gas containing portion 351 is arranged in the peripheral area 3021, and the second gas containing portion 352 is arranged in the distribution area 3022 and located between adjacent branch flow channels 3411. The number of the first gas containing portion 351 and the second gas containing portion 352 can be one or more.

[0161] When the first plate body 31 and the second plate body 32 are connected, the first plate body 31 and the second plate body 32 are arranged and sealed in at least part of the area outside the gas containing portion 35 and the heat exchange flow channel 34. The peripheral area 3021 is arranged at the outer periphery of the refrigerant heat exchange component 30, so that the peripheral area 3021 can have a part with a large connection area and a risk of gas trapping. By arranging the first gas containing portion 351 in the peripheral area 3021, the first gas containing portion 351 can contain gas and reduce the risk of gas trapping in the peripheral area 3021. The distribution area 3022 has a plurality of branch flow channels 3411, and the plurality of branch flow channels 3411 are arranged at intervals. If the distance between adjacent branch flow channels 3411 is far, the distribution area 3022 can also have a part with a large connection area and a risk of gas trapping. By arranging the second gas containing portion 352 in the distribution area 3022, the second gas containing portion 352 can contain gas and reduce the risk of gas trapping in the distribution area 3022.

[0162] The heat exchange flow channel 34 provided by the embodiment of the present application comprises a plurality of parallelly arranged sub-flow channels 341, each of which can independently circulate refrigerant, and the refrigerant heat exchange component 30 is not easily affected by the blockage of a certain position of the heat exchange flow channel 34, so that the reliability of the refrigerant heat exchange component 30 is improved; meanwhile, the first plate body 31 and the second plate body 32 have a large connection area in the peripheral region 3021 and the sub-flow region 3022, the first gas containing part 351 and the second gas containing part 352 are arranged, the risk of gas trapping in the peripheral region 3021 and the sub-flow region 3022 of the refrigerant heat exchange component 30 is reduced, and the reliability of the refrigerant heat exchange component 30 is further improved.

[0163] In some embodiments, the number of the first gas containing part 351 and the second gas containing part 352 is multiple, and the multiple first gas containing parts 351 are arranged in at least one row along the edge of the refrigerant heat exchange component 30.

[0164] As Figure 6 to Figure 9 shown, the first gas containing part 351 and the second gas containing part 352 can be a gas containing groove or a gas exhaust hole. The multiple first gas containing parts 351 are arranged in one or more rows along the edge of the refrigerant heat exchange component 30, and the number and size of the first gas containing part 351 can be set according to the area of the peripheral region 3021; the multiple second gas containing parts 352 are respectively arranged between adjacent branch flow channels 3411, and the number and size of the second gas containing part 352 can be set according to the area of the circulation region.

[0165] As Figure 6 shown, the first gas containing part 351 is arranged in two rows on both sides of the refrigerant heat exchange component 30 along the width direction thereof; on one side of the refrigerant heat exchange component 30 along the length direction thereof close to the flow channel inlet, the multiple first gas containing parts 351 are arranged in one row, and on the other side of the refrigerant heat exchange component 30 along the length direction thereof, the multiple first gas containing parts 351 are arranged in two rows. In an example, each row of the first gas containing part 351 is arranged along the first direction X or the second direction Y, and in other embodiments, the first gas containing part 351 can be arranged in an inclined manner along a direction intersecting the first direction X and the second direction Y. The first gas containing part 351 and the second gas containing part 352 can be a gas containing groove, which can not only contain excess gas, but also improve the structural strength of the refrigerant heat exchange component 30.

[0166] By arranging the multiple first gas containing parts 351, the multiple first gas containing parts 351 can be adapted to the area of the peripheral region 3021, and the risk of gas trapping in the peripheral region 3021 is effectively reduced; by arranging the multiple second gas containing parts 352, the multiple second gas containing parts 352 can be adapted to the area between the branch flow channels 3411, and the risk of gas trapping in the sub-flow region 3022 is effectively reduced.

[0167] Please refer to Figure 6 to Figure 9In some embodiments, the first distance between any two adjacent first gas containing portions 351 is less than or equal to 35 mm, and optionally, the first distance is in a range from 5 mm to 20 mm.

[0168] The two adjacent first gas containing portions 351 can be two first gas containing portions 351 in the same row or two first gas containing portions 351 in different rows. In the present embodiment, the first distance between any two adjacent first gas containing portions 351 is less than or equal to 35 mm. In addition, the plurality of first gas containing portions 351 can be arranged at intervals or not arranged at intervals, as long as the distance between any two adjacent first gas containing portions 351 is less than or equal to 35 mm.

[0169] When the connection area of the first plate body 31 and the second plate body 32 is greater than 35 mm*35 mm, the gas trapping problem is likely to occur between the first plate body 31 and the second plate body 32. By setting the first distance between the two adjacent first gas containing portions 351 to be less than or equal to 35 mm, the risk of gas trapping at the large-area connection of the refrigerant heat exchange component 30 can be effectively reduced.

[0170] Optionally, the first distance is in a range from 5 mm to 20 mm, for example, the first distance can be 5 mm, 10 mm, 15 mm, 20 mm, etc. By setting the first distance to be greater than or equal to 5 mm, the manufacturing difficulty of the first plate body 31 can be reduced. By setting the first distance to be less than or equal to 20 mm, the risk of gas trapping can be better reduced.

[0171] Please refer to Figure 6 to Figure 9 In some embodiments, the second distance between the two second gas containing portions 352 arranged adjacent to each other between the two branch flow channels 3411 is less than or equal to 35 mm.

[0172] A plurality of second gas containing portions 352 are arranged between the two adjacent branch flow channels 3411, and the second distance between the adjacent second gas containing portions 352 is less than or equal to 35 mm. It can be understood that if only one second gas containing portion 352 is arranged between the two adjacent branch flow channels 3411, the distance between the second gas containing portion 352 and the adjacent branch flow channel 3411 can also be less than or equal to 35 mm. By setting the second distance between the two adjacent second gas containing portions 352 to be less than or equal to 35 mm, the risk of gas trapping between the branch flow channels of the refrigerant heat exchange component 30 can be effectively reduced.

[0173] In some embodiments, the second distance is in a range from 5 mm to 20 mm, and the second distance can be 5 mm, 10 mm, 15 mm, 20 mm, etc. The first distance and the second distance can be equal or not equal.

[0174] By setting the second distance to be greater than or equal to 5 mm, the manufacturing difficulty of the first plate body 31 can be reduced, and by setting the second distance to be less than or equal to 20 mm, the risk of gas stagnation can be better reduced.

[0175] Please refer to Figure 5 to Figure 7 In some embodiments, the number of battery cell assemblies 20 is multiple groups; each branch channel 3411 includes an inflow branch channel 34111 and a return flow branch channel 34112, the inflow branch channel 34111, the sub-channel 3412 and the return flow branch channel 34112 are sequentially communicated, each sub-channel 3412 is arranged in a bending loop and forms a heat exchange region, and the heat exchange region is arranged opposite to at least one group of battery cell assemblies 20.

[0176] The number of battery cell assemblies 20 is multiple groups, wherein the battery cell assembly 20 includes a plurality of battery cells 21 arranged along a first direction X, and the plurality of battery cell assemblies 20 are arranged along a second direction Y, in addition, the plurality of battery cell assemblies 20 can also be arranged along the second direction YX.

[0177] The heat exchange channel 34 includes a plurality of sub-channels 341, the sub-channel 341 includes a branch channel 3411 and a sub-channel 3412, each sub-channel 3412 includes an inflow branch channel 34111 and a return flow branch channel 34112, the sub-channel 3412 is arranged in a bending loop, and the two ends of the sub-channel 3412 along its extension direction are connected to the inflow branch channel 34111 and the return flow branch channel 34112, respectively, so that the refrigerant can flow from the inflow branch channel 34111 into the sub-channel 3412, and then flow from the sub-channel 3412 into the return flow branch channel 34112, so that each sub-channel 341 can exchange heat with the battery cell assembly 20.

[0178] At the same time, the sub-channel 3412 is arranged in a bending loop, and the sub-channel 3412 can bend multiple times within the functional region 301, so that the sub-channel 3412 forms a heat exchange region, which is arranged opposite to one or more groups of battery cell assemblies 20, that is to say, the orthographic projection of one or more groups of battery cell assemblies 20 towards the refrigerant heat exchange component 30 falls within a heat exchange region. The flow channel part formed by each bending of the sub-channel 3412 can include one flow channel or multiple parallel flow channels to increase the flow channel area.

[0179] By adopting the above technical scheme, each sub-channel 3412 can exchange heat with one or more battery cell assemblies 20, achieving heat management of one or more battery cell assemblies 20, if one branch channel 3411 abnormally due to blockage or other reasons, other sub-channels 3412 can be used normally, reducing the risk of heat management failure of the battery device, and improving the reliability of the battery device.

[0180] Please refer to Figure 6In some embodiments, a plurality of sub-channels 3412 are arranged sequentially along the second direction Y, and the plurality of sub-channels 3412 are symmetrically arranged with respect to the center line of the refrigerant heat exchange component 30 in the second direction Y.

[0181] Multiple inlet branch channels 34111 and multiple return branch channels 34112 are spaced apart along the second direction Y to facilitate flow diversion; multiple sub-channels 3412 are spaced apart along the second direction Y, and each sub-channel 3412 extends along the first direction X and turns back.

[0182] The centerline of the refrigerant heat exchange component 30 in the second direction Y is also the centerline of the heat exchange area in the second direction Y. Figure 6 The center line AA is illustrated. Multiple sub-channels 3412 are symmetrically arranged relative to this center line, enabling them to uniformly exchange heat with the battery cell assembly 20, thus improving the uniformity of thermal management. For example, as shown... Figure 5 to Figure 9 As shown, the heat exchange channel 34 includes six branch channels 341. Each branch channel 341 includes an inlet branch channel 34111, a return branch channel 34112, and a sub-channel 3412. That is, the heat exchange channel 34 includes six sub-channels 3412, and each sub-channel 3412 is arranged in a zigzag shape. Three sub-channels 3412 are respectively arranged on both sides of the center line of the refrigerant heat exchange component 30 in the second direction Y, and the positions and structures of the sub-channels 3412 on both sides are symmetrically arranged. In other embodiments, the number of branch channels 341 can also be two, four, etc., as long as the multiple sub-channels 3412 are symmetrically arranged.

[0183] By adopting the above technical solution, the sub-channels 3412 on both sides of the refrigerant heat exchange component 30 are evenly distributed, and the temperature distribution difference of the battery device 100 in the symmetrical area can be controlled within the design range, resulting in good uniformity of thermal management effect.

[0184] like Figure 6 As shown, in some embodiments, the sub-channel 3412 includes an inlet sub-segment 34121, a return sub-segment 34122, and an intermediate sub-segment 34123 located between the inlet sub-segment 34121 and the return sub-segment 34122; in two adjacent sub-channels 3412, the return sub-segment 3412 of one sub-channel 3412 is arranged adjacent to the inlet sub-segment 34121 of the other sub-channel 3412 in the second direction Y.

[0185] The inlet sub-segment 34121 is located near the inlet branch channel 34111, and the return sub-segment 34122 is located near the return branch channel 34112. The return sub-segment can be set in a strip shape or a bend.

[0186] by Figure 6 For example, the refrigerant heat exchange component 30 along Figure 6The first sub-inflow section 34121 of the first sub-flow channel 341 is arranged adjacent to the second sub-flow channel 341, the second sub-inflow section 34121 of the second sub-flow channel 341 is arranged adjacent to the third sub-flow channel 341, the second sub-outflow section 34122 of the fourth sub-flow channel 341 is arranged adjacent to the fifth sub-inflow section 34121 of the fifth sub-flow channel 341, and the second sub-outflow section 34122 of the fifth sub-flow channel 341 is arranged adjacent to the sixth sub-inflow section 34121 of the sixth sub-flow channel 341.

[0187] In some embodiments, the refrigerant changes from liquid to gas after heat exchange in the refrigerant heat exchange component 30. The refrigerant is substantially gasified in the loop part, and the heat exchange amount of the gaseous refrigerant is small, so the temperature fluctuation is large. The liquid refrigerant amount in the inlet part is large, the phase change heat exchange amount is large, and the temperature change is small. In the embodiments of the present application, the first sub-inflow section 34121 and the second sub-outflow section 34122 of the different sub-flow channels 341 are arranged adjacent to each other, which can reduce the temperature change of the heat exchange flow channel 34 in the loop part and reduce the temperature difference of each part of the refrigerant heat exchange component 30.

[0188] By adopting the above technical solutions, the refrigerant heat exchange component 30 provided by the embodiments of the present application can balance the temperature of the heat exchange flow channel 34 by arranging the low-temperature first sub-inflow section 34121 adjacent to the high-temperature second sub-outflow section 34122, thereby reducing the temperature difference of the refrigerant heat exchange component 30.

[0189] Please refer to Figure 6 to Figure 9 In some embodiments, the heat exchange flow channel 34 further includes a main flow channel, and the plurality of sub-flow channels 341 are connected to the main flow channel, and the main flow channel extends along the second direction Y; and at least one gas-containing part 35 is arranged along the main flow channel.

[0190] Specifically, the heat exchange flow channel 34 further includes two inflow main flow channels and two outflow main flow channels, the two inflow main flow channels are arranged on the two sides of the refrigerant heat exchange component 30 in the second direction Y, and the two outflow main flow channels are arranged on the two sides of the refrigerant heat exchange component 30 in the second direction Y. Each inflow main flow channel is connected to a plurality of inflow branch flow channels 34111, and each outflow main flow channel is connected to a plurality of outflow branch flow channels 34112.

[0191] Please refer to Figure 5 to Figure 7 In some embodiments, the orthographic projection of the plurality of battery monomer assemblies 20 towards the refrigerant heat exchange component 30 completely falls within the functional area 301; the second sub-outflow section 34122 of the plurality of sub-flow channels 3412 respectively extends to the opposite sides of the refrigerant heat exchange component 30 along the second direction Y; and along the second direction Y, at least one second sub-outflow section 34122 does not coincide with the orthographic projection of the battery monomer assembly 20.

[0192] The orthographic projection of the plurality of battery cell assemblies 20 towards the refrigerant heat exchange component 30 falls completely within the functional area 301, so that the functional area 301 of the refrigerant heat exchange component 30 can simultaneously exchange heat with the plurality of battery cell assemblies 20, the efficiency of thermal management is higher, and the uniformity of thermal management is better. At the same time, along the second direction Y, the orthographic projection of at least one backflow sub-section 34122 does not coincide with the battery cell assembly 20, that is, the backflow sub-section 34122 is arranged staggered with the battery cell assembly 20, reducing the heat exchange between the backflow sub-section 34122 and the battery cell assembly 20.

[0193] In the refrigerant heat exchange component 30, the refrigerant flows from the inflow sub-section 34121 to the backflow sub-section 34122 of the sub-flow channel 3412, and exchanges heat with the battery cell assembly 20 during the flow process. The temperature of the refrigerant may rise, so that the backflow sub-section 34122 close to the edge is in a overheating area. By staggering the backflow sub-section 34122 with the battery cell assembly 20, the influence of the overheating area on the temperature of the battery cell assembly 20 can be reduced.

[0194] In some embodiments, the refrigerant in the heat exchange flow channel 34 is a phase change working medium.

[0195] The refrigerant can be a phase change working medium, and the refrigerant can be in a gas-liquid two-phase state during the flow process. The refrigerant can be R134A (tetrafluoroethane), R1234YF (tetrafluoropropene), R1233ZD (monochlorotrifluoropropene), etc.

[0196] The refrigerant heat exchange component 30 uses a phase change working medium, and the refrigerant heat exchange component 30 is a direct cooling plate. The direct cooling plate has the advantage of high heat exchange efficiency, and at the same time, the direct cooling plate has high requirements for structural strength and welding performance. The refrigerant heat exchange component 30 provided in the embodiments of the present application is provided with a gas containing portion 35, which can greatly reduce the risk of welding gas trapping and improve the production yield of the refrigerant heat exchange component 30.

[0197] In some embodiments, the box body 10 includes a box body 12 and an upper cover 11. The box body 12 is provided with openings at both ends, and the upper cover 11 and the refrigerant heat exchange component 30 cover the openings at both ends of the box body 12, respectively. The refrigerant heat exchange component 30 is bonded to the battery cell assembly 20 by a heat-conducting adhesive.

[0198] The refrigerant heat exchange component 30 is arranged at the bottom of the box body 10 and the plurality of battery cell assemblies 20, and the refrigerant heat exchange component 30 can be used as the bottom plate of the box body 10, simplifying the structure of the battery device and helping to save vehicle space.

[0199] The refrigerant heat exchange component 30 is bonded to the battery cell assembly 20 by a heat-conducting adhesive. The refrigerant heat exchange component 30 can directly exchange heat with the battery cell assembly 20, has high heat exchange efficiency and high heat exchange effect, and effectively improves the reliability of the battery device.

[0200] The battery device further comprises a bottom guard plate 40 connected to the refrigerant heat exchange component 30 on the side away from the box body 12, which can protect the refrigerant heat exchange component 30 and reduce the collision force of the electric device on the refrigerant heat exchange component 30 during use, so that the refrigerant heat exchange component 30 is less likely to be deformed by collision.

[0201] Please refer to Figure 2 to Figure 9 Some embodiments of the present application provide a battery device, comprising a box body 10, a battery monomer assembly 20 and a refrigerant heat exchange component 30, the refrigerant heat exchange component 30 is connected to the box body 10, the refrigerant heat exchange component 30 has a functional area 301 and a non-functional area 302 outside the functional area 301, the functional area 301 is used for heat exchange with the battery monomer 21; the refrigerant heat exchange component 30 comprises a first plate body 31 and a second plate body 32 which are stacked and connected, a heat exchange flow channel 34 for refrigerant flow is formed between the first plate body 31 and the second plate body 32, and the heat exchange flow channel 34 is at least partially arranged in the functional area 301; a plurality of gas containing parts 35 are arranged in the refrigerant heat exchange component 30, the gas containing part 35 is arranged in the first plate body 31, and the gas containing part 35 comprises at least one of a gas containing groove and a gas discharge hole; the heat exchange flow channel 34 comprises a plurality of parallelly arranged branch flow channels 341, the branch flow channel 341 comprises a sub-flow channel 3412 connected to a branch flow channel 3411; the non-functional area 302 comprises a peripheral area 3021 and a branch area 3022, the peripheral area 3021 is arranged on the outer circumferential side of the heat exchange flow channel 34, a plurality of branch flow channels 3411 are arranged in the branch area 3022, and the sub-flow channel 3412 is at least partially arranged in the functional area 301; the plurality of gas containing parts 35 comprise a first gas containing part 351 arranged in the peripheral area 3021 and a second gas containing part 352 arranged in the branch area 3022, and the second gas containing part 352 is arranged between adjacent branch flow channels 3411. The battery device provided by the embodiments of the present application can reduce the risk of gas being trapped in the refrigerant heat exchange component 30, thereby reducing the risk of expansion, cracking, flow channel cross-flow and other risks of the refrigerant heat exchange component 30 caused by gas being trapped, and improving the reliability of the refrigerant heat exchange component 30 and the reliability of the battery device.

[0202] The embodiments of the second aspect of the present application provide a refrigerant heat exchange component 30, comprising a first plate body 31 and a second plate body 32 which are stacked and connected, a heat exchange flow channel 34 for refrigerant flow is formed between the first plate body 31 and the second plate body 32; a gas containing part 35 is arranged in the first plate body 31, the gas containing part 35 has an opening towards the second plate body 32; along the extension direction of the refrigerant heat exchange component 30, the gas containing part 35 is arranged in parallel with the heat exchange flow channel 34.

[0203] The air containing part 35 is arranged in the first plate body 31, and can contain the gas that is not timely discharged between the first plate body 31 and the second plate body 32 during the process of connecting the first plate body 31 and the second plate body 32, thereby reducing the risk of air trapping, and further reducing the problems of local bulging, cracking, flow channel cross-flow and the like of the refrigerant heat exchange component 30 caused by air trapping, improving the production yield of the refrigerant heat exchange component 30, and improving the reliability of the refrigerant heat exchange component 30.

[0204] The third aspect of the present application provides a power consuming device, which comprises the battery device 100 provided in the first aspect or the refrigerant heat exchange component 30 provided in the second aspect, and the battery device 100 is used to provide electric energy.

[0205] The power consuming device can be the device or system of any one of the application battery devices 100.

[0206] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A battery device, characterized by, The battery device comprises: a box body; a battery cell assembly arranged in the box body; a refrigerant heat exchange component connected to the box body, the refrigerant heat exchange component comprising a first plate body and a second plate body stacked and connected, a heat exchange flow channel for refrigerant flow being formed between the first plate body and the second plate body; the first plate body is provided with a gas containing portion, the gas containing portion has an opening facing the second plate body; along the extension direction of the refrigerant heat exchange component, the gas containing portion is arranged in a spaced manner with the heat exchange flow channel.

2. The battery device of claim 1, wherein The heat exchange flow channel is recessed in the first plate body.

3. The battery device of claim 1, wherein The gas containing portion comprises a gas containing groove, the gas containing groove is recessed on one side of the first plate body facing the second plate body.

4. The battery device of claim 3, wherein The width of the gas containing groove is 5mm-20mm, and / or the depth of the gas containing groove is 2mm-3mm.

5. The battery device of claim 3, wherein The width of the heat exchange flow channel is 5mm-20mm, and / or the depth of the heat exchange flow channel is 2mm-3mm.

6. The battery device of claim 1, wherein The gas containing portion comprises an exhaust hole, the exhaust hole penetrates the first plate body.

7. The battery device of claim 6, wherein The exhaust hole is a circular hole, the hole diameter of the exhaust hole is 3mm-15mm.

8. The battery device of claim 6, wherein The gas containing portion comprises at least one of a gas containing groove and an exhaust hole.

9. The battery device of any one of claims 1-8, wherein, The first plate body is provided with a flow guide groove, the second plate body and the first plate body are welded and connected in at least a partial region outside the flow guide groove and the gas containing portion, the flow guide groove and the second plate body enclose the heat exchange flow channel.

10. The battery device of any one of claims 1-9, wherein, The refrigerant heat exchange component has a functional region and a non-functional region arranged outside the functional region, the heat exchange flow channel is at least partially arranged in the functional region, the functional region is used for heat exchange with the battery cell assembly, and the gas containing portion is arranged in the non-functional region.

11. The battery device of claim 10, wherein, The battery device comprises a plurality of battery cell assemblies, each battery cell assembly comprises a plurality of battery cells arranged in a first direction, and a plurality of battery cell assemblies are arranged in a second direction, the first direction intersects the second direction; The refrigerant heat exchange component is located on one side of the battery cell assembly along a third direction, the functional region is arranged opposite to a plurality of battery cell assemblies, and the third direction is perpendicular to the first direction and the second direction.

12. The battery device of claim 11, wherein: The heat exchange flow channel comprises a plurality of branch flow channels arranged in parallel, the branch flow channel comprises a sub-flow channel connected to the branch flow channel; the non-functional region comprises a peripheral region and a branch flow region, the peripheral region is arranged on the outer circumferential side of the heat exchange flow channel, a plurality of branch flow channels are arranged in the branch flow region, and the sub-flow channel is at least partially arranged in the functional region; The number of gas containing portions is a plurality, and the plurality of gas containing portions comprise a first gas containing portion arranged in the peripheral region and a second gas containing portion arranged in the branch flow region, and the second gas containing portion is arranged between adjacent branch flow channels.

13. The battery device of claim 12, wherein, The number of the first gas containing portion and the second gas containing portion is a plurality, and a plurality of the first gas containing portion is arranged in at least one row along the edge of the refrigerant heat exchange component.

14. The battery device according to claim 12 or 13, wherein Any two adjacent first air containing portions have a first distance, which is less than or equal to 35 mm, and optionally, the first distance ranges from 5 mm to 20 mm.

15. The battery device of any one of claims 12-14, wherein, Two second air containing portions adjacent to each other between two branch channels have a second distance, which is less than or equal to 35 mm, and optionally, the second distance ranges from 5 mm to 20 mm.

16. The battery device of any one of claims 12-15, wherein, The branch channel includes an inflow branch channel and an outflow branch channel, the inflow branch channel, the sub-flow channel and the outflow branch channel are sequentially communicated, each sub-flow channel is arranged in a bending loop and forms a heat exchange area, and the heat exchange area is arranged opposite to at least one group of battery cell assemblies.

17. The battery device of any one of claims 12-16, wherein, A plurality of sub-flow channels are sequentially arranged along the second direction, and the plurality of sub-flow channels are symmetrically arranged relative to a center line of the refrigerant heat exchange component in the second direction.

18. The battery device of any one of claims 12-17, wherein, The sub-flow channel includes an inflow sub-section, an outflow sub-section and an intermediate sub-section between the inflow sub-section and the outflow sub-section. In adjacent two sub-flow channels, the outflow sub-section of one of the sub-flow channels is arranged adjacent to the inflow sub-section of the other sub-flow channel in the second direction.

19. The battery device of claim 18, wherein The projections of a plurality of battery cell assemblies toward the refrigerant heat exchange component fall within the functional area, and the outflow sub-sections of a plurality of sub-flow channels respectively extend to opposite sides of the refrigerant heat exchange component along the second direction. Along the second direction, at least one outflow sub-section does not coincide with the projection of the battery cell assembly.

20. The battery device of any one of claims 1-19, wherein, The refrigerant in the heat exchange channel is a phase change working medium.

21. The battery device of any one of claims 1-20, wherein, The box includes a box body and an upper cover, two ends of the box body are respectively provided with openings, the upper cover and the refrigerant heat exchange component cover the openings at the two ends of the box body, and the refrigerant heat exchange component and the battery cell assembly are bonded by a heat conductive adhesive.

22. A refrigerant heat exchange component, comprising: The refrigerant heat exchange component includes a first plate body and a second plate body stacked and connected, a heat exchange channel for refrigerant flow is formed between the first plate body and the second plate body, the first plate body is provided with an air containing portion, the air containing portion has an opening toward the second plate body, and along the extension direction of the refrigerant heat exchange component, the air containing portion is spaced apart from the heat exchange channel.

23. An electrical device, comprising: The battery device of any one of claims 1-21 or the refrigerant heat exchange component of claim 22, wherein the battery device is used to provide electric energy.

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