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) at least comprises a first plate body (31) and a second plate body (32) which are arranged in a stacked mode, a refrigerant heat exchange flow channel (34) is defined by the first plate body (31) and the second plate body (32), the first plate body (31) is provided with a welding part (312), a material containing space (301) is formed in the welding part (312), the material containing space (301) and the refrigerant heat exchange flow channel (34) are arranged adjacently, the material containing space (301) is provided with an opening facing the second plate body (32), and the opening faces the second plate body (32). And the second plate body (32) is welded and connected to the welding part (312). 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.

[0002] 202420907842.4, the Chinese patent application with the title of "Heat exchange device, battery and electric device" filed on April 28, 2024 with the State Intellectual Property Office, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

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

[0004] 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 the core component of new energy vehicles has a high requirement in reliability. CONTENT

[0005] Therefore, the present application provides a refrigerant heat exchange component, a battery device and an electric device, which have high reliability.

[0006] The first aspect of the present application provides a battery device, comprising: a box body; a battery monomer assembly arranged in the box body; a refrigerant heat exchange component configured to exchange heat with the battery monomer assembly, the refrigerant heat exchange component at least comprising a first plate body and a second plate body arranged in layers, the first plate body and the second plate body jointly enclosing a refrigerant heat exchange flow channel, the first plate body having a welding portion, the second plate body being welded to the welding portion, a material containing space being arranged in the welding portion, the material containing space having an opening facing the second plate body, the material containing space being arranged adjacent to the refrigerant heat exchange flow channel to block the flow of welding material into the refrigerant heat exchange flow channel.

[0007] The battery device provided by the present application comprises a box body, a battery monomer assembly and a refrigerant heat exchange component, a refrigerant heat exchange flow channel is formed in the refrigerant heat exchange component to perform heat management on the battery monomer assembly, thereby improving the reliability of the battery operation; the refrigerant heat exchange component at least comprises a first plate body and a second plate body, a material containing space is arranged in the welding portion of the first plate body and the opening of the material containing space faces the second plate body, by arranging the material containing space, the contact area of the first plate body and the second plate body is reduced, and the welding area is correspondingly reduced, at the same time, the material containing space blocks the path of the welding material moving towards the refrigerant heat exchange flow channel, and the material containing space can also store excess welding material, therefore, the scheme provided by the present application reduces the problem of the welding material flowing into the refrigerant heat exchange flow channel and causing blockage, thereby reducing the risk of functional abnormalities of the refrigerant heat exchange component and heat management failure of the battery caused by the blockage of the refrigerant heat exchange flow channel, improving the reliability of the battery device, improving the welding yield of the refrigerant heat exchange component and reducing the cost of the refrigerant heat exchange component.

[0008] In some embodiments, the welding portion includes a plurality of spaced connection regions, at least one of which is provided with a material containing space; on one side of the refrigerant heat exchange flow channel, the material containing space separates the connection region into a first region and a second region distributed along a preset direction, the first region is located between the refrigerant heat exchange flow channel and the material containing space, and the material containing space is used to block the flow of the solder from the second region to the first region.

[0009] By adopting the above technical scheme, the material containing space can block the flow of the solder in the second region towards the first region, thereby protecting the refrigerant heat exchange flow channel.

[0010] In some embodiments, along the preset direction, the width of the first region is less than or equal to the width of the second region.

[0011] By adopting the above technical scheme, the distance between the material containing space and the part of the refrigerant heat exchange flow channel adjacent to the material containing space is less than or equal to the distance between the material containing space and the side of the connection region away from the part of the refrigerant heat exchange flow channel, so that the distance between the material containing space and the refrigerant heat exchange flow channel is relatively short, and the effect of preventing blockage is good.

[0012] In some embodiments, one side of the first plate body facing the second plate body is concave with a flow channel portion, and the flow channel portion and the second plate body jointly enclose the refrigerant heat exchange flow channel.

[0013] By adopting the above technical scheme, the material containing space and the flow channel portion are both made on the first plate body, and the second plate body can be a flat plate structure, so that the refrigerant heat exchange component is simple and convenient to manufacture, and the manufacturing efficiency is relatively high.

[0014] In some embodiments, the material containing space and the part of the refrigerant heat exchange flow channel adjacent to the material containing space have a preset distance, and the preset distance is less than or equal to 35 mm.

[0015] The preset distance between the refrigerant heat exchange flow channel and the material containing space is less than or equal to 35 mm in the embodiments of the present application, which can effectively reduce the risk of blockage of the refrigerant heat exchange flow channel.

[0016] In some embodiments, the preset distance is in the range of 5 mm to 20 mm.

[0017] By setting the preset distance to be greater than or equal to 5 mm, the risk of direct communication between the air containing space and the refrigerant heat exchange flow channel is reduced, and the manufacturing difficulty of the refrigerant heat exchange component is reduced; by setting the preset distance to be less than or equal to 20 mm, the risk of soldering blockage can be better reduced.

[0018] In some embodiments, the welding portion is provided with a material containing groove, and the material containing groove forms the material containing space inside.

[0019] By arranging the material containing groove in the welding portion of the first plate body, the material containing groove not only separates the refrigerant heat exchange flow channel from the welding area with large width, reduces the risk of flow channel welding blockage, but also improves the structural strength of the first plate body, and reduces the risk of damage of the first plate body under external force.

[0020] In some embodiments, the material containing groove is in a strip shape, and the material containing groove extends along the part of the refrigerant heat exchange flow channel adjacent to the material containing groove.

[0021] By adopting the above technical solution, the material containing groove can reduce the welding area of the welding portion, and the material containing groove extends along the refrigerant heat exchange flow channel, at least in the length range, reduces the risk of refrigerant heat exchange flow channel welding blockage, and has a good effect of preventing welding blockage.

[0022] In some embodiments, the width of the material containing groove is 5mm-20mm, and / or the depth of the material containing groove is 2mm-3mm.

[0023] By adopting the above technical solution, the material containing groove can contain more welding material, and can avoid that the thickness of the refrigerant heat exchange component is too large to occupy too much space.

[0024] In some embodiments, the width of the refrigerant heat exchange flow channel is 5mm-20mm, and / or the depth of the refrigerant heat exchange flow channel is 2mm-3mm.

[0025] By arranging the refrigerant heat exchange flow channel to meet the above conditions, the refrigerant heat exchange flow channel can have sufficient flow of refrigerant and the working pressure will not be too large.

[0026] In some embodiments, the welding portion is provided with a through hole, and the inside of the through hole forms a material containing space.

[0027] By arranging the through hole in the welding portion, the through hole can separate the refrigerant heat exchange flow channel from the welding area with large welding width, and the through hole can contain and / or discharge excess welding material, further reducing the risk of welding blockage.

[0028] In some embodiments, the through hole is circular, and the diameter of the through hole is 3mm-15mm.

[0029] By adopting the above technical solution, the size of the through hole can adapt to the size of the refrigerant heat exchange component, and the through hole has less influence on the structural strength of the refrigerant heat exchange component.

[0030] In some embodiments, at least one of the material containing groove and the through hole is arranged in the welding portion, and a material containing space is formed in the material containing groove and / or the through hole.

[0031] By adopting the above technical solution, the refrigerant heat exchange component can be arranged with the material containing groove and / or the through hole according to its installation requirements, size and other conditions, and the material containing groove and the through hole can be combined to achieve the effect of preventing welding blockage.

[0032] In some embodiments, the first plate body has a flow channel region and a peripheral region outside the flow channel region, the refrigerant heat exchange flow channel is located in the flow channel region, and the welding portion is located in both the flow channel region and the peripheral region; the material containing space includes a first material containing space, and the first material containing space is located in the peripheral region.

[0033] By adopting the above technical solution, the first material containing space is located in the peripheral region, which can separate the part with a wider welding width of the peripheral region from the refrigerant heat exchange flow channel, thereby reducing the risk of blocking the welding of the refrigerant heat exchange flow channel.

[0034] In some embodiments, along the length direction of the first plate body, the first material containing space is located at one side of the first plate body, and the distance from the first material containing space to the refrigerant heat exchange flow channel is smaller than the distance from the first material containing space to the edge of the first plate body; and / or, along the width direction of the first plate body, the first material containing space is located at one side of the first plate body, and the distance from the first material containing space to the refrigerant heat exchange flow channel is smaller than the distance from the first material containing space to the edge of the first plate body.

[0035] By adopting the above technical solution, the distance between the first material containing space and the refrigerant heat exchange flow channel is relatively close, which can separate the refrigerant heat exchange flow channel from the region with a larger welding width of the plate periphery, thereby achieving a better effect of preventing the welding from being blocked.

[0036] In some embodiments, the first material containing space extends along the edge of the flow channel region; and / or, the number of the first material containing spaces is multiple, and the multiple first material containing spaces are arranged along the edge of the flow channel region.

[0037] By adopting the above technical solution, the first material containing space can be arranged along the extension direction of the refrigerant heat exchange flow channel to adapt to the length of the refrigerant heat exchange flow channel, thereby being able to provide a more comprehensive effect of preventing the welding from being blocked for the refrigerant heat exchange flow channel.

[0038] In some embodiments, the material containing space further includes one or more second material containing spaces, and the second material containing spaces are located in the flow channel region.

[0039] By adopting the above technical solution, the flow of excess solder towards the inside of the refrigerant heat exchange flow channel can be blocked, thereby also achieving the effect of preventing the welding from being blocked.

[0040] In some embodiments, the refrigerant heat exchange flow channel includes multiple parallelly arranged sub-flow channels, the sub-flow channel includes an inflow branch flow channel, an outflow branch flow channel, and multiple sub-flow channels connected between the inflow branch flow channel and the outflow branch flow channel, the multiple sub-flow channels are sequentially connected, the sub-flow channel extends along a first direction, and the multiple sub-flow channels are arranged along a second direction, the second direction intersects the first direction; the inflow branch flow channel and / or the outflow branch flow channel is arranged adjacent to the second material containing space.

[0041] By setting the second material containing space adjacent to the inflow branch channel and the return flow branch channel, the key part of the refrigerant heat exchange channel can be preferentially protected, and the reliability of the refrigerant heat exchange component is improved.

[0042] In some embodiments, a plurality of second material containing spaces are arranged between at least two adjacent inflow branch channels; and / or, a plurality of second material containing spaces are arranged between the inflow branch channel and the return flow branch channel.

[0043] By adopting the above technical solution, the refrigerant heat exchange component can flexibly set a plurality of second material containing spaces to reduce the risk of blocking welding of the inflow branch channel and the return flow branch channel, and improve the welding yield and reliability of the refrigerant heat exchange component.

[0044] In some embodiments, the refrigerant heat exchange channel further comprises a main inflow channel and a main return flow channel, the main inflow channel is in communication with the plurality of inflow branch channels, and the main return flow channel is in communication with the plurality of return flow branch channels; the main inflow channel and / or the main return flow channel is arranged adjacent to the second material containing space.

[0045] By adopting the above technical solution, the second material containing space adjacent to the main inflow channel and / or the main return flow channel is arranged to reduce the risk of blocking welding of the main inflow channel and / or the main return flow channel, and improve the welding yield and reliability of the refrigerant heat exchange component.

[0046] In some embodiments, the first plate body comprises a body portion and a composite layer arranged on the surface of the body portion, the composite layer is welded with the second plate body as solder, and the material containing space can contain the solder.

[0047] By adopting the above technical solution, the material containing space can contain part of the excess solder to block the flow of the solder towards the refrigerant heat exchange channel, thereby reducing the risk of blocking welding of the refrigerant heat exchange channel.

[0048] In some embodiments, the box body comprises a box body and an upper cover, 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 respectively, and the refrigerant heat exchange component is bonded with the battery monomer assembly through the heat-conducting adhesive.

[0049] By adopting the above technical solution, the refrigerant heat exchange component can directly exchange heat with the battery monomer assembly, the heat exchange efficiency is high, and the heat exchange effect is high, thereby effectively improving the reliability of the battery device.

[0050] In some embodiments, the refrigerant in the refrigerant heat exchange channel is a phase change working medium.

[0051] By adopting the above technical solution, the refrigerant heat exchange component can be a direct cooling plate, which has a higher requirement for welding performance, the refrigerant heat exchange component provided by the embodiments of the present application is provided with a material containing space, which can greatly reduce the risk of welding blockage, and improve the production yield of the refrigerant heat exchange component.

[0052] An embodiment of the second aspect of this application provides a refrigerant heat exchange component, the refrigerant heat exchange component including at least a first plate and a second plate stacked together, the first plate and the second plate forming a refrigerant heat exchange channel, the first plate having a welding portion, the second plate being welded to the welding portion, the welding portion having a material-containing space having an opening facing the second plate, the material-containing space being disposed adjacent to the refrigerant heat exchange channel to prevent the solder from flowing into the refrigerant heat exchange channel.

[0053] An embodiment of the third aspect of this application provides an electrical device including a battery device as provided in the first aspect or a refrigerant heat exchange component as provided in the second aspect, wherein the battery device is used to provide electrical energy.

[0054] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0055] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0056] Figure 1 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application;

[0057] Figure 2 This is a schematic diagram of the structure of a battery device provided in an embodiment of this application;

[0058] Figure 3 This is an exploded perspective view of a battery cell provided in an embodiment of this application;

[0059] Figure 4 An exploded perspective view of a refrigerant heat exchange component provided in an embodiment of this application;

[0060] Figure 5 This is a schematic diagram of the structure of the first plate body provided in an embodiment of this application;

[0061] Figure 6 for Figure 5 Enlarged view of part A in the middle;

[0062] Figure 7 for Figure 5 Enlarged view of part B in the middle;

[0063] Figure 8 A sectional view of a partial structure of a refrigerant heat exchange component according to an embodiment of the present application;

[0064] Figure 9 A structure diagram of a first plate according to another embodiment of the present application;

[0065] Figure 10 A structure diagram of a first plate in a refrigerant heat exchange component according to still another embodiment of the present application;

[0066] Figure 11 A Figure 10 An enlarged view of a part C;

[0067] The meanings of the marks in the figures are as follows:

[0068] 1000, vehicle; 100, battery device; 200, controller; 300, motor; 10, case; 11, upper cover; 12, case body; 20, battery cell assembly; 21, battery cell; 211, shell; 212, end cover; 213, electrode assembly; 214, electrode terminal; 215, pressure relief mechanism; 30, refrigerant heat exchange component; 301, refrigerant containing space; 3011, first refrigerant containing space; 3012, second refrigerant containing space; 31, first plate; 31a, flow channel region; 31b, peripheral region; 311, flow channel portion; 312, welding portion; 3121, connecting region; 31211, first region; 31212, second region; 3122, refrigerant containing groove; 3123, through hole; 313, body portion; 314, composite layer; 32, second plate; 33, heat exchange joint; 34, refrigerant heat exchange flow channel; 341, branch flow channel; 3411, inlet branch flow channel; 3412, return branch flow channel; 3413, sub-flow channel; 342, main inlet flow channel; 343, main return flow channel; 40, bottom guard plate. DETAILED DESCRIPTION

[0069] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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).

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells.

[0080] 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.

[0081] 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.

[0082] As an example, the battery cell assembly can be a battery module, which can be accommodated in the box by fixing the battery module in the box.

[0083] 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.

[0084] 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.

[0085] Fast charging is a mainstream solution for new energy vehicles to achieve fast energy replenishment. In the implementation process, many challenges are encountered. During the fast charging process, the battery cells will generate a large amount of heat, which will 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.

[0086] Therefore, 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 are welded to form a flow channel for the refrigerant to flow. The refrigerant heat exchange component adjusts the temperature inside the battery through the refrigerant. However, during the welding process of the two plate bodies, if the welding area near the flow channel is wide and the solder is more, it is easy to cause the solder to flow into the flow channel and cause the flow channel to be blocked, thereby causing the refrigerant heat exchange component to malfunction, affecting the heat management effect of the battery and the reliability of the battery operation.

[0087] 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 comprises a first plate body and a second plate body stacked, the first plate body and the second plate body jointly enclose a refrigerant heat exchange flow channel, the first plate body has a welding portion and a material containing space is arranged in the welding portion, the material containing space is arranged adjacent to the refrigerant heat exchange flow channel, the material containing space has an opening towards the second plate body, and the second plate body is welded and connected to the welding portion.

[0088] In the above battery device, the first plate body and the second plate body are welded and connected, the welding portion of the first plate body is provided with a material containing space, and the opening of the material containing space faces the second plate body. By arranging the material containing space, the contact area of the first plate body and the second plate body is reduced, and the welding area is correspondingly reduced. At the same time, the material containing space blocks the path of the welding material moving towards the refrigerant heat exchange flow channel, and the material containing space can also store excess welding material. Therefore, the scheme provided by the embodiments of the present application reduces the problem of the welding material flowing into the refrigerant heat exchange flow channel and causing blockage, thereby reducing the risk of functional abnormalities of the refrigerant heat exchange component and the failure of battery thermal management caused by the blockage of the refrigerant heat exchange flow channel, and improving the reliability of the battery device.

[0089] The technical solutions described in the embodiments of the present application are applicable to various battery monomer using electric devices, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spaceship, etc. The following embodiments take a vehicle as an example for convenience of description.

[0090] Please refer to Figure 1 , Figure 1 The structural schematic diagram of the vehicle 1000 provided by some embodiments of the present application is shown. The vehicle 1000 can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric 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, the head or the 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 the operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle 1000 during starting, navigation and driving.

[0091] In some embodiments of the present application, the battery device 100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing the fuel or natural gas to provide driving power for the vehicle 1000.

[0092] Please refer to Figure 2 and Figure 3 The battery device 100 includes a box body 10 and a battery cell 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 cells 21. The box body 12 can be a hollow structure with one end open. The upper cover 11 can be a plate-shaped structure, and the upper cover 11 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.

[0093] The battery cell assembly 20 is usually formed by arranging a plurality of battery cells 21. The battery cell 21 is the smallest unit that constitutes the battery device 100. The battery cell 21 includes a shell 211, an end cover 212, an electrode assembly 213, and other functional components.

[0094] 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. Alternatively, 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 and 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 and pressure relief mechanisms 215. 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., which are not specially limited in the embodiments of the present application. 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.

[0095] The case 211 is a component for fitting the end cover 212 to form an internal environment of the battery cell 21, where the formed internal environment can be used to accommodate the electrode assembly 213, electrolyte, and other components. The case 211 and the end cover 212 can be independent components, and an opening can be provided on the case 211, and the end cover 212 is fitted to cover the opening to form the internal environment of the battery cell 21. Without limitation, the end cover 212 and the case 211 can also be integrated, specifically, the end cover 212 and the case 211 can be formed as a common connecting surface before other components are put into the case, and when it is necessary to seal the inside of the case 211, the end cover 212 is fitted to cover the case 211. The case 211 can be of various shapes and sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. Specifically, the shape of the case 211 can be determined according to the specific shape and size of the electrode assembly 213. The material of the case 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 on this.

[0096] The electrode assembly 213 is a component where electrochemical reactions occur in the battery cell 21. One or more electrode assemblies 213 can be contained in the case 211. The electrode assembly 213 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have a portion with active material constituting a main body of the electrode assembly 213, and a portion without active material of the positive electrode sheet and the negative electrode sheet respectively constituting a tab. The positive tab and the negative tab can be located together at one end of the main body or respectively at both ends of the main body. In the charging and discharging process of the battery device 100, the positive active material and the negative active material react with the electrolyte, and the tabs are connected to the electrode terminal 214 to form a current loop. In some embodiments, a pressure relief mechanism 215 is provided on one side of the battery cell 21, where the pressure relief mechanism 215 refers to an element or component that is actuated to release the internal pressure when the internal pressure or temperature of the battery cell 21 reaches a predetermined threshold.

[0097] Please refer to Figure 2 , Figures 4 to 6In the first aspect, the embodiments of the present application provide a battery device 100, comprising a box 10, a battery cell assembly 20 and a refrigerant heat exchange component 30. The battery cell assembly 20 is arranged in the box 10, and the refrigerant heat exchange component 30 is configured to exchange heat with the battery cell assembly 20. The refrigerant heat exchange component 30 comprises at least a first plate 31 and a second plate 32 arranged in a stack. The first plate 31 and the second plate 32 jointly enclose a refrigerant heat exchange flow channel 34. The first plate 31 has a welding portion 312, and the second plate 32 is welded to the welding portion 312. The welding portion 312 is provided with a material containing space 301. The material containing space 301 has an opening facing the second plate 32. The material containing space 301 is arranged adjacent to the refrigerant heat exchange flow channel 34 to block the flow of welding material into the refrigerant heat exchange flow channel 34.

[0098] The box 10 is used to accommodate the battery cell assembly 20. For example, the box 10 comprises an upper cover 11 and a box body 12. The upper cover 11 and the box body 12 jointly enclose an accommodation space.

[0099] The battery cell assembly 20 comprises a plurality of battery cells 21. For example, the battery cell assembly 20 comprises a plurality of battery cells 21 arranged in a first direction X. A plurality of battery cell assemblies 20 are arranged in a second direction Y. The battery cells 21 are arranged in an array. The second direction Y intersects the first direction X. Optionally, the first direction X can be the length direction of the box 10, and the second direction Y can be the width direction of the box 10. In other embodiments, the first direction X and / or the second direction Y can be obliquely intersected with the length direction of the box 10.

[0100] The refrigerant heat exchange component 30 is used to accommodate refrigerant to regulate the temperature of the battery cell assembly 20. The battery cell assembly 20 generates heat during the circulation process. The refrigerant heat exchange component 30 can be used to cool the battery cell assembly 20. 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 30 can also be used to heat the battery cell assembly 20, which will not be described here.

[0101] 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 10. For example, the box 10 comprises an upper cover 11 and a box body 12. 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 10, outside the box 10, or as a lower cover of the box body 12. In this case, the two ends of the box body 12 are open, and the upper cover 11 and the refrigerant heat exchange component 30 are respectively arranged on the two sides of the box body 12.

[0102] The refrigerant heat exchange component 30 at least comprises a first plate body 31 and a second plate body 32 arranged in a stack, the first plate body 31 and the second plate body 32 can have the same or similar size, and the first plate body 31 and the second plate body 32 can be made of metal, composite material or other materials.

[0103] The first plate body 31 and the second plate body 32 jointly enclose a refrigerant heat exchange flow channel 34. For example, the first plate body 31 is provided with an unsealed flow channel part 311, and the flow channel part 311 can be sealed to form the refrigerant heat exchange flow channel 34 after the first plate body 31 is connected with the second plate body 32; in other embodiments, the second plate body 32 can be provided with the unsealed flow channel part 311, or the first plate body 31 and the second plate body 32 are provided with opposite flow channel parts 311.

[0104] The refrigerant heat exchange flow channel 34 is used for refrigerant flow, for example, the refrigerant can include fluorine-containing cooling medium, etc. The refrigerant heat exchange flow channel 34 can be connected with a compressor, a water pump, a fan, a condenser and other heat exchange equipment through a pipeline, etc., so that the refrigerant flows to other heat exchange equipment to reduce the temperature and take out the heat inside the battery.

[0105] The first plate body 31 has a welding part 312, which refers to the part of the first plate body 31 used for welding with the second plate body 32. By welding the welding part 312 with the second plate body 32, the refrigerant heat exchange flow channel 34 can be sealed. It can be understood that the welding part 312 at least includes the peripheral part of the first plate body 31, and according to the shape of the refrigerant heat exchange flow channel 34, the welding part 312 can also include the part between different flow channel parts of the refrigerant heat exchange flow channel 34.

[0106] The welding part 312 is provided with a material containing space 301, and the opening of the material containing space 301 faces the second plate body 32. The material containing space 301 can be formed by a hole, a groove or other structures. By providing the material containing space 301, the contact area of the first plate body 31 and the second plate body 32 is reduced, and the welding area of the welding part 312 is also reduced. At the same time, since the material containing space 301 is arranged adjacent to the refrigerant heat exchange flow channel 34, the material containing space 301 can block the welding material from moving towards the refrigerant heat exchange flow channel 34, and the material containing space 301 can also contain part of the welding material, further reducing the risk of the welding material flowing into the refrigerant heat exchange flow channel 34. The welding material is a general term of metal alloy materials used for filling into welds, build-up welding layers and brazing seams. In this embodiment, the welding material is the welding material between the first plate body 31 and the second plate body 32, and the first plate body 31 and the second plate body 32 are fixedly connected by the welding material. For example, the welding material includes the material on the surface of the first plate body 31 and / or the second plate body 32, for example, the welding material includes a composite layer on the surface of the first plate body 31 and / or the second plate body 32.

[0107] The battery device 100 provided by the embodiment of the present application comprises a box body 10, a battery monomer assembly 20 and a refrigerant heat exchange component 30, the refrigerant heat exchange component 30 is internally formed with a refrigerant heat exchange flow channel 34, so that the battery monomer assembly 20 is subjected to thermal management, and the reliability of the operation of the battery device 100 is improved; the refrigerant heat exchange component 30 comprises a first plate body 31 and a second plate body 32, the welding portion 312 of the first plate body 31 is internally provided with a material containing space 301, and the opening of the material containing space 301 faces the second plate body 32; by arranging the material containing space 301, the contact area of the first plate body 31 and the second plate body 32 is reduced, and the welding area is correspondingly reduced; meanwhile, the material containing space 301 blocks the path of the welding material moving towards the refrigerant heat exchange flow channel 34, and the material containing space 301 can also store the excess welding material; therefore, the scheme provided by the embodiment of the present application reduces the problem that the welding material flows into the refrigerant heat exchange flow channel 34 and causes blockage, and further reduces the risk of the functional abnormality of the refrigerant heat exchange component 30 and the thermal management failure of the battery device 100 caused by the blockage of the refrigerant heat exchange flow channel 34, improves the reliability of the battery device 100, improves the welding yield of the refrigerant heat exchange component 30, and reduces the cost of the refrigerant heat exchange component 30.

[0108] Please refer to Figures 4 to 7 In some embodiments, the welding portion 312 comprises a plurality of spaced-apart connection areas 3211, and at least one connection area 3211 is internally provided with a material containing space 301; on one side of the refrigerant heat exchange flow channel 34, the material containing space 301 separates the connection area 3211 into a first area 32111 and a second area 32112 which are distributed along a preset direction, and the first area 32111 is located between the refrigerant heat exchange flow channel 34 and the material containing space 301; the material containing space 301 is used for blocking the flow of the welding material from the second area 32112 to the first area 32111.

[0109] Optionally, along the preset direction, the width of the first area 32111 is less than or equal to the width of the second area 32112.

[0110] The welding portion 312 comprises a plurality of spaced-apart connection areas 3211, and each connection area 3211 is welded to the second plate body; the refrigerant heat exchange flow channel 34 extends between adjacent connection areas 3211, and one or more connection areas 3211 are internally provided with a material containing space 301.

[0111] The "preset direction" is the direction in which the material containing space 301 separates the connection area 3211.

[0112] As Figure 5 , Figure 6As shown in the examples, in the length direction (X direction) of the refrigerant heat exchange component 30, on one side of the refrigerant heat exchange flow channel 34, the material containing space 301 divides the connecting area 3211 into a first area 32111 and a second area 32112 distributed along the length direction of the refrigerant heat exchange component 30, the first area 32111 is located between the refrigerant heat exchange flow channel 34 and the material containing space 301; optionally, in the length direction of the refrigerant heat exchange component 30, the width of the first area 32111 is less than or equal to the width of the second area 32112, that is, the material containing space 301 is arranged adjacent to the refrigerant heat exchange flow channel 34; if the width of the first area 3211 is less than the width of the second area 32112, the material containing space 301 is closer to the refrigerant heat exchange flow channel 34 than the edge of the connecting area 3211.

[0113] As shown in the examples, in the width direction (Y direction) of the refrigerant heat exchange component 30, on one side of the refrigerant heat exchange flow channel 34, the material containing space 301 divides the connecting area 3211 into a first area 32111 and a second area 32112 distributed along the width direction of the refrigerant heat exchange component 30, the first area 32111 is located between the refrigerant heat exchange flow channel 34 and the material containing space 301, and the second area 32112 is located between the material containing space 301 and the edge of the refrigerant heat exchange component; optionally, in the width direction of the refrigerant heat exchange component 30, the width of the first area 32111 is less than or equal to the width of the second area 32112, that is, the material containing space 301 is arranged adjacent to the refrigerant heat exchange flow channel 34; if the width of the first area 3211 is less than the width of the second area 32112, the material containing space 301 is closer to the refrigerant heat exchange flow channel 34 than the edge of the connecting area 3211.

[0114] As shown in the examples, Figure 5 , Figure 7 The refrigerant heat exchange flow channel 34 can have various arrangements, and the refrigerant heat exchange flow channel 34 forms a plurality of flow channel branches. In some embodiments, the connecting area 3211 between adjacent flow channel branches is wide, increasing the risk of block welding. Therefore, the material containing space 301 can also be arranged in the connecting area 3211 between the flow channel branches, and on one side of the refrigerant heat exchange flow channel 34, the material containing space 301 divides the connecting area 3211 between the flow channel branches into a first area 32111 and a second area 32112, and optionally, in a direction perpendicular to the material containing space 301, the width of the first area 32111 is less than or equal to the width of the second area 32112.

[0115] By adopting the above technical scheme, the material containing space 301 is arranged adjacent to the refrigerant heat exchange flow channel 34, and the material containing space 301 can block the solder in the second area 32112 from flowing towards the first area 32111 to protect the refrigerant heat exchange flow channel 34.

[0116] Optionally, along a preset direction, the width of the first region 32111 is less than or equal to the width of the second region 32112, and the distance between the material storage space 301 and the adjacent portion of the refrigerant heat exchange channel 34 is less than or equal to the distance from the material storage space 301 to the side of the connecting region 3211 away from the portion of the refrigerant heat exchange channel 34. This allows the distance between the material storage space 301 and the refrigerant heat exchange channel 34 to be smaller, resulting in a better anti-clogging effect.

[0117] Please refer to Figure 4 , Figure 5 The first plate 31 has a recessed flow channel 311 on the side facing the second plate 32, and the flow channel 311 and the second plate 32 together form a refrigerant heat exchange flow channel 34.

[0118] The flow channel 311 is recessed in the first plate 31. After the first plate 31 and the second plate 32 are welded together, the flow channel 311 and the second plate 32 together form the refrigerant heat exchange flow channel 34. The material holding space 301 is also provided in the first plate 31. The material holding space 301 and the flow channel 311 can be fabricated together on the first plate 31, which improves manufacturing efficiency. For example, the material holding space 301 and the flow channel 311 can be fabricated on the first plate 31 by stamping.

[0119] Optionally, the first plate 31 is disposed on the side of the second plate 32 away from the battery cell assembly 20. The second plate 32 can be a flat plate to facilitate contact and heat exchange with the battery cell assembly 20.

[0120] By adopting the above technical solution, the material storage space 301 and the flow channel 311 are both fabricated on the first plate 31, and the second plate 32 can be a flat plate structure. The fabrication method of the refrigerant heat exchange component 30 is simple and convenient, and the fabrication efficiency is high.

[0121] In other embodiments, the flow channel 311 and the material holding space 301 may be provided in either the first plate 31 or the second plate 32, or simultaneously in both the first plate 31 and the second plate 32.

[0122] In some embodiments, there is a preset distance between the material storage space 301 and the adjacent portion of the refrigerant heat exchange channel 34, which is less than or equal to 35 mm.

[0123] Since the function of the material storage space 301 is to prevent blockage of the refrigerant heat exchange channel 34, the embodiment of this application sets the preset distance between the material storage space 301 and the refrigerant heat exchange channel 34 to be less than or equal to 35mm, so as to achieve a good anti-blocking effect. For example, the preset distance is 3mm, 5mm, 15mm, 20mm, 30mm, 35mm, etc.; when there are multiple material storage spaces 301, the distance between the material storage space 301 and the refrigerant heat exchange channel 34 does not have to be equal, as long as the above range is met.

[0124] When the welding width of the refrigerant heat exchange channel 34 side is greater than 35 mm, the problem of blocked welding is prone to occur. The preset distance between the refrigerant heat exchange channel 34 and the material containing space 301 in the embodiment of the application is less than or equal to 35 mm, which can effectively reduce the risk of blocking the refrigerant heat exchange channel 34.

[0125] In some embodiments, the preset distance ranges from 5 mm to 20 mm. For example, the preset distance is 5 mm, 10 mm, 15 mm, 20 mm, etc. The preset distance between the material containing space 301 and the refrigerant heat exchange channel 34 can be determined according to the width of the refrigerant heat exchange channel 34, the welding area on one side of the refrigerant heat exchange channel 34, etc. to reduce the risk of blocked welding.

[0126] By setting the preset distance to be greater than or equal to 5 mm, the risk of direct communication between the air containing space and the refrigerant heat exchange channel 34 is reduced, and the manufacturing difficulty of the refrigerant heat exchange component 30 is reduced. By setting the preset distance to be less than or equal to 20 mm, the risk of blocked welding can be better reduced.

[0127] Please refer to Figures 4 to 8 In some embodiments, a material containing groove 3122 is arranged in the welding portion 312, and the material containing space 301 is formed in the interior of the material containing groove 3122.

[0128] The material containing groove 3122 is concave on the side of the first plate body 31 facing the second plate body 32. The material containing groove 3122 can be strip-shaped, arc-shaped, etc. The material containing groove 3122 can also be shaped to at least partially imitate the refrigerant heat exchange channel 34, so that the material containing groove 3122 can serve as a false channel. The interior of the material containing groove 3122 forms the material containing space 301, and the opening of the material containing groove 3122 faces the second plate body 32 to accommodate excess solder between the first plate body 31 and the second plate body 32. In addition, the material containing groove 3122 can be made by stamping or the like, which not only can accommodate the solder, but also can improve the structural strength of the refrigerant heat exchange component 30.

[0129] By adopting the above technical scheme, by arranging the material containing groove 3122 in the welding portion 312 of the first plate body 31, not only can the material containing groove 3122 separate the refrigerant heat exchange channel 34 and the welding area with a larger width to reduce the risk of blocked channel welding, but also can use the material containing groove 3122 to improve the structural strength of the first plate body 31, thereby reducing the risk of damage to the first plate body 31 under external force.

[0130] Please refer to Figure 5 In some embodiments, the material containing groove 3122 is strip-shaped, and the material containing groove 3122 extends along the part of the refrigerant heat exchange channel 34 adjacent to it.

[0131] The material containing groove 3122 is strip-shaped, that is, the length dimension of the material containing groove 3122 is greater than the width dimension of the material containing groove 3122. The material containing groove 3122 extends along the refrigerant heat exchange channel 34, so that the material containing space 301 formed by the material containing groove 3122 also extends along the refrigerant heat exchange channel 34. As shown in Figure 5 The material containing groove 3122 is strip-shaped, that is, the length dimension of the material containing groove 3122 is greater than the width dimension of the material containing groove 3122. The material containing groove 3122 extends along the refrigerant heat exchange channel 34, so that the material containing space 301 formed by the material containing groove 3122 also extends along the refrigerant heat exchange channel 34. As shown in

[0132] By adopting the above technical solution, the material containing groove 3122 can reduce the welding area of the welding portion 312, and the material containing groove 3122 extends along the refrigerant heat exchange channel 34, at least in the length range, reducing the risk of blocking the welding of the refrigerant heat exchange channel 34, and the anti-blocking welding effect is good.

[0133] Please continue to refer to Figure 5 In some embodiments, the width of the material containing groove 3122 is 5mm-20mm, and / or the depth of the material containing groove 3122 is 2mm-3mm.

[0134] The material containing groove 3122 can also be referred to as a false channel, and the material containing groove 3122 does not need to flow through the refrigerant. The width of the material containing groove 3122 is 5mm-20mm, for example, the width of the material containing groove 3122 can be 5mm, 8mm, 10mm, 15mm, 20mm, etc. The width of the material containing groove 3122 can be equal to the width of the refrigerant heat exchange channel 34, or it can not be equal, which is not limited here. The width of the material containing groove 3122 is greater than or equal to 5mm, which can make the material containing groove 3122 be able to contain more solder and effectively separate the refrigerant heat exchange channel 34 and the area with a larger welding width; the width of the material containing groove 3122 is less than or equal to 20mm, which can adapt to the overall size of the refrigerant heat exchange component 30.

[0135] The depth of the material containing groove 3122 is 2mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 3mm, etc. By setting the depth of the material containing groove 3122 to be greater than or equal to 2mm, the material containing groove 3122 can contain more solder; the depth of the material containing groove 3122 is less than or equal to 3mm, which can adapt to the overall size of the refrigerant heat exchange component 30, avoiding that the thickness of the refrigerant heat exchange component 30 is too large to occupy too much space.

[0136] In other embodiments, the width of the material containing groove 3122 can also be other ranges to adapt to the size of the refrigerant heat exchange component 30 and the anti-blocking welding requirement.

[0137] By adopting the above technical solution, the size of the material containing groove 3122 can meet the requirements of anti-blocking welding and match the size of the refrigerant heat exchange component 30, and is easy to implement.

[0138] In some embodiments, the width of the refrigerant heat exchange flow channel 34 is 5mm-20mm, and / or the depth of the refrigerant heat exchange flow channel 34 is 2mm-3mm.

[0139] The width of the refrigerant heat exchange flow channel 34 refers to the width of the refrigerant flow path in the refrigerant heat exchange flow channel 34, and the width of the refrigerant heat exchange flow channel 34 affects the flow cross-sectional area of the refrigerant heat exchange flow channel 34. In some embodiments, the width W1 of the refrigerant heat exchange flow channel 34 can be 5mm, 8mm, 10mm, 15mm, 20mm, etc. The width of the refrigerant heat exchange flow channel 34 is greater than or equal to 5mm, which can make the refrigerant heat exchange flow channel 34 have sufficient flow of refrigerant; the width of the refrigerant heat exchange flow channel 34 is less than or equal to 20mm, which can make the working pressure of the refrigerant not too large to affect the structural reliability of the refrigerant heat exchange component 30.

[0140] The depth of the refrigerant heat exchange flow channel 34 can be 2mm, 2.5mm, 2.7mm, 3mm, etc. By setting the depth of the refrigerant heat exchange flow channel 34 to be greater than or equal to 2mm, the refrigerant heat exchange flow channel 34 can have sufficient flow of refrigerant; the depth of the refrigerant heat exchange flow channel 34 is less than or equal to 3mm, which can make the working pressure of the refrigerant not too large to affect the structural reliability of the refrigerant heat exchange component 30.

[0141] If the flow channel part 311 and the material containing groove 3122 are both concave on the side of the first plate body 31 facing the second plate body 32, the flow channel part 311 and the material containing groove 3122 are made on the first plate body 31 by stamping, the bottom of the refrigerant heat exchange flow channel 34 and the material containing groove 3122 is set to be convex relative to the first plate body 31, by setting the depth of the refrigerant heat exchange flow channel 34 and the material containing groove 3122 to be less than or equal to 3mm, the height of the refrigerant heat exchange flow channel 34 and the material containing groove 3122 can be controlled, the overall size of the refrigerant heat exchange component 30 is reduced, and the installation requirements are met.

[0142] By setting the refrigerant heat exchange flow channel 34 to meet the above conditions, the refrigerant heat exchange flow channel 34 can have sufficient flow of refrigerant and the working pressure will not be too large. In addition, the width of the material containing groove 3122 can be equal to or similar to the width of the refrigerant heat exchange flow channel 34, and the depth of the material containing groove 3122 can be equal to or similar to the depth of the refrigerant heat exchange flow channel 34, so that the material containing groove 3122 is easy to manufacture and occupies less space.

[0143] Please refer to Figures 9 to 11 In some embodiments, a through hole 3123 is provided in the welding part 312, and the inside of the through hole 3123 forms a material containing space 301.

[0144] The through hole 3123 is a hole penetrating the first plate body 31 along the thickness direction of the first plate body 31. As shown in Figure 9 the through hole 3123 is a circular hole; as shown in Figure 10 and Figure 11 the through hole 3123 is a long hole, for example, the through hole 3123 can be a slit-shaped long hole.

[0145] The number of the through hole 3123 can be one or more. For example, the number of the through hole 3123 is multiple, and the multiple through holes 3123 are distributed between the outer side of the refrigerant heat exchange flow channel 34 and the flow channel parts 311 far away from each other in the refrigerant heat exchange flow channel 34.

[0146] By arranging the through hole 3123 in the welding part 312, the through hole 3123 can separate the refrigerant heat exchange flow channel 34 and the welding area with a large welding width, and the through hole 3123 can accommodate and / or discharge excess solder, further reducing the risk of welding blockage. In addition, the through hole 3123 can also discharge gas between the first plate body 31 and the second plate body 32 during welding, which has the effect of preventing gas from being trapped.

[0147] It should be noted that in some embodiments, the through hole 3123 can be filled or partially filled with solder, which does not affect the effect of preventing welding blockage of the through hole 3123 during welding.

[0148] As shown in Figure 9 in some embodiments, the through hole 3123 is circular, and the diameter of the through hole 3123 is 3mm-15mm.

[0149] The through hole 3123 is a circular hole, and the diameter of the through hole 3123 can be equal or not equal, for example, a larger diameter through hole 3123 is arranged in the area where the first plate body 31 and the second plate body 32 have a larger connection area.

[0150] The diameter of the through hole 3123 can be 3mm, 5mm, 6mm, 8mm, 10mm, 15mm, etc. The diameter of the through hole 3123 is greater than or equal to 3mm, so as to separate the refrigerant heat exchange flow channel 34 and the welding area with a larger width by using the through hole 3123; the diameter of the through hole 3123 is less than or equal to 15mm, on the one hand, the size of the through hole 3123 can adapt to the size of the refrigerant heat exchange part 30, on the other hand, the through hole 3123 has little effect on the structural strength of the refrigerant heat exchange part 30.

[0151] In other embodiments, the through hole 3123 can also be square, oval or other shapes.

[0152] Please refer to Figures 5 to 11In some embodiments, the soldering portion 312 is provided with at least one of a material containing groove 3122 and a through hole 3123, and a material containing space 301 is formed in the material containing groove 3122 and / or the through hole 3123.

[0153] Specifically, the material containing space 301 can be multiple, and the material containing space 301 can be formed by the material containing groove 3122 or the through hole 3123. For example, because the edge area of the refrigerant heat exchange component 30 often needs to be in contact with the bottom guard plate or the box body 10, there can be not enough space to set the material containing groove 3122. In this case, the through hole 3123 can be set in a certain area to prevent the flow of solder, and the material containing groove 3122 is preferred when the space is sufficient, and the through hole 3123 is used as an auxiliary when the space is insufficient. The strip-shaped through hole 3123 (or groove hole) is set in the area with a wide welding width to block the flow of solder.

[0154] By using the above technical solution, the refrigerant heat exchange component 30 can set the material containing groove 3122 and / or the through hole 3123 according to its installation requirements, size and other conditions, and the material containing groove 3122 and the through hole 3123 can be combined to achieve the effect of preventing solder blocking.

[0155] Please refer to Figures 4 to 11 In some embodiments, the first plate body 31 has a flow channel area 31a and a peripheral area 31b outside the flow channel area 31a, the refrigerant heat exchange flow channel 34 is located in the flow channel area 31a, and the soldering portion 312 is located in the flow channel area 31a and the peripheral area 31b at the same time; the material containing space 301 includes a first material containing space 3011, and the first material containing space 3011 is located in the peripheral area 31b.

[0156] The flow channel area 31a is the area where the refrigerant heat exchange flow channel 34 is located, and it is also a complete area. For the convenience of illustration, Figure 5 The flow channel area 31a is indicated by a circle of dashed lines, wherein the flow channel inlet and the flow channel outlet can be in the flow channel area 31a or outside the flow channel area 31a, and the present application does not limit this; Figure 5 The edge of the soldering portion 312 is also indicated by a circle of dashed lines, wherein the edge of the soldering portion 312 can be close to the edge of the first plate body 31 or coincide with the edge of the first plate body 31, and the present application does not limit this.

[0157] The peripheral area 31b is an area outside the flow channel area 31a, and the soldering portion 312 is located in the flow channel area 31a and the peripheral area 31b at the same time. The soldering portion 312 refers to the part of the first plate body 31 used for welding with the second plate body 32. The part of the soldering portion 312 in the flow channel area 31a can separate different flow channel parts 311 of the refrigerant heat exchange flow channel 34, and the part of the soldering portion 312 in the peripheral area 31b can seal and connect the first plate body 31 and the second plate body 32.

[0158] The material containing space 301 includes a first material containing space 3011 arranged at the peripheral area 31b, and the number of the first material containing space 3011 can be one or more, for example, a plurality of first material containing spaces 3011 extend along the edge of the flow channel area 31a.

[0159] The material containing space 301 includes a first material containing space 3011 arranged at the peripheral area 31b, and due to the wide welding width of the peripheral area 31b, the first material containing space 3011 arranged at the peripheral area 31b can separate the part with wide welding width of the peripheral area 31b from the refrigerant heat exchange flow channel 34, thereby reducing the risk of blocking the refrigerant heat exchange flow channel 34.

[0160] In some embodiments, along the length direction of the first plate body 31, the first material containing space 3011 is arranged at one side of the first plate body 31, and the distance between the first material containing space 3011 and the refrigerant heat exchange flow channel 34 is less than the distance between the first material containing space 3011 and the edge of the first plate body 31; and / or, along the width direction of the first plate body 31, the first material containing space 3011 is arranged at one side of the first plate body 31, and the distance between the first material containing space 3011 and the refrigerant heat exchange flow channel 34 is less than the distance between the first material containing space 3011 and the edge of the first plate body 31.

[0161] Please refer to Figure 5 , the length direction of the first plate body 31 is the X direction, and the width direction of the first plate body 31 is the Y direction. Along the length direction of the first plate body 31, the first material containing space 3011 is arranged at one side of the first plate body 31, and the distance between the first material containing space 3011 and the refrigerant heat exchange flow channel 34 is less than the distance between the first material containing space 3011 and the edge of the first plate body 31, that is, the first material containing space 3011 is closer to the refrigerant heat exchange flow channel 34.

[0162] Similarly, along the width direction of the first plate body 31, the first material containing space 3011 is arranged at one side of the first plate body 31, and the distance between the first material containing space 3011 and the refrigerant heat exchange flow channel 34 is less than the distance between the first material containing space 3011 and the edge of the first plate body 31, that is, the first material containing space 3011 is closer to the refrigerant heat exchange flow channel 34.

[0163] By adopting the above technical scheme, the distance between the first material containing space 3011 and the refrigerant heat exchange flow channel 34 is close, which can separate the refrigerant heat exchange flow channel 34 from the area with large peripheral welding width, and the effect of preventing blocking is good.

[0164] In some embodiments, the first material containing space 3011 extends along the edge of the flow channel area 31a; and / or, the number of the first material containing space 3011 is a plurality, and the plurality of first material containing spaces 3011 are arranged along the edge of the flow channel area 31a.

[0165] The first material containing space 3011 can be circular, square, oval, long strip-shaped, etc. Optionally, as shown in Figure 5 , Figure 11 The first material containing space 3011 is formed by a strip-shaped material containing groove 3122 or a strip-shaped through hole 3123, the first material containing space 3011 is strip-shaped, and the first material containing space 3011 extends along the edge of the flow channel area 31a. Optionally, as shown in Figures 5 to 9 , a plurality of first material containing spaces 3011 are arranged along the edge of the flow channel area 31a.

[0166] By adopting the above technical scheme, the first material containing space 3011 can be arranged along the extension direction of the refrigerant heat exchange flow channel 34 to adapt to the length of the refrigerant heat exchange flow channel 34, so as to provide a more comprehensive anti-blocking welding effect for the refrigerant heat exchange flow channel 34.

[0167] Please continue to refer to Figures 5 to 11 In some embodiments, the material containing space 301 further comprises one or more second material containing spaces 3012, and the second material containing space 3012 is arranged in the flow channel area 31a.

[0168] The refrigerant heat exchange flow channel 34 can have various arrangements, and the refrigerant heat exchange flow channel 34 forms a plurality of flow channel branches. In some embodiments, the distance between adjacent flow channel branches is far, which increases the risk of blocking welding. Therefore, the embodiment of the present application arranges one or more second material containing spaces 3012 in the flow channel area 31a, which can block the flow of excess solder towards the inside of the refrigerant heat exchange flow channel 34, and also has the effect of anti-blocking welding.

[0169] Please refer to Figure 4 , Figure 5 In some embodiments, the refrigerant heat exchange flow channel 34 comprises a plurality of parallelly arranged sub-flow channels 341, the sub-flow channel 341 comprises an inflow branch flow channel 3411, an outflow branch flow channel 3412, and a plurality of sub-flow channels 3413 connected between the inflow branch flow channel 3411 and the outflow branch flow channel 3412, the plurality of sub-flow channels 3413 are sequentially connected, the sub-flow channel 3413 extends along a first direction and the plurality of sub-flow channels 3413 are arranged along a second direction, the second direction intersects the first direction; the inflow branch flow channel 3411 and / or the outflow branch flow channel 3412 is arranged adjacent to the second material containing space 3012.

[0170] 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.

[0171] Each branch flow channel 341 comprises an inflow branch flow channel 3411, an outflow branch flow channel 3412, and a plurality of sub-flow channels 3413. Refrigerant entering the refrigerant heat exchange component 30 from the flow channel inlet flows through the plurality of sub-flow channels 3413 in sequence from the inflow branch flow channel 3411, and then flows to the flow channel outlet through the outflow branch flow channel 3412. The plurality of sub-flow channels 3413 are arranged side by side, which is good for heat exchange of the battery monomer assembly 20. The sub-flow channels 3413 extend in a first direction, and the plurality of sub-flow channels 3413 are arranged in a second direction. The first direction can be the direction in which the plurality of battery monomers 21 in the battery monomer assembly 20 are arranged, and the first direction is the X direction in the figure. The second direction can be perpendicular to the first direction, and the second direction is the Y direction in the figure. Optionally, the sub-flow channels 3413 can further comprise a plurality of parallel sub-flow channels 3413 to improve the reliability of heat exchange and increase the heat exchange area. Since the sub-flow channels 3413 are arranged more densely, the risk of blockage of the sub-flow channels 3413 is small,

[0172] The inflow branch flow channel 3411 and the outflow branch flow channel 3412 are arranged in the flow channel region 31a, and there can be a region with a large welding width between the branch flow channels. Therefore, the second material space 3012 is arranged adjacent to the inflow branch flow channel 3411 and / or the outflow branch flow channel 3412 to reduce the risk of blockage of the inflow branch flow channel 3411 and / or the outflow branch flow channel 3412. In addition, if the inflow branch flow channel 3411 and the outflow branch flow channel 3412 are blocked, it will affect the entire branch flow channel 341 and reduce the reliability of thermal management. By arranging the second material space 3012 adjacent to the inflow branch flow channel 3411 and the outflow branch flow channel 3412, the key part of the refrigerant heat exchange flow channel 34 can be protected first, and the reliability of the refrigerant heat exchange component 30 is improved.

[0173] In some embodiments, a plurality of second material spaces 3012 are arranged between at least two adjacent inflow branch flow channels 3411; and / or a plurality of second material spaces 3012 are arranged between the inflow branch flow channel 3411 and the outflow branch flow channel 3412.

[0174] As Figure 4 and Figure 5As shown, the number of second material storage spaces 3012 can be multiple, for example, if the welding width between two adjacent inlet branch channels 3411 is wide, multiple second material storage spaces 3012 are arranged between the two, and each second material storage space 3012 is arranged adjacent to at least one inlet branch channel 3411.

[0175] During the flow of the refrigerant, the refrigerant exchanges heat with the battery monomer 21, which can cause the refrigerant in the return branch channel 3412 to have a higher temperature. Therefore, in the embodiment of the application, the return branch channel 3412 is arranged at the edge position of the flow channel area 31a. Optionally, at least one return branch channel 3412 can be arranged staggered with the battery monomer assembly 20.

[0176] Since the return branch channel 3412 is arranged at the edge position of the flow channel area 31a, there can be a region with a wide welding width between the inlet branch channel 3411 and the return branch channel 3412, and multiple second material storage spaces 3012 are arranged between the two, and each second material storage space 3012 is arranged adjacent to the inlet branch channel 3411 and / or the return branch channel 3412.

[0177] By adopting the above technical solution, the refrigerant heat exchange component 30 can flexibly arrange multiple second material storage spaces 3012 to reduce the risk of block welding between the inlet branch channel 3411 and the return branch channel 3412, and improve the welding yield and reliability of the refrigerant heat exchange component 30.

[0178] As shown in Figure 4 and Figure 5 In some embodiments, the refrigerant heat exchange flow channel 34 further comprises a main inlet channel 342 and a main return channel 343, the main inlet channel 342 is in communication with the plurality of inlet branch channels 3411, and the main return channel 343 is in communication with the plurality of return branch channels 3412; the main inlet channel 342 and / or the main return channel 343 are arranged adjacent to the second material storage space 3012.

[0179] The main inlet channel 342 can distribute the refrigerant to the plurality of inlet branch channels 3411, and the main return channel 343 can collect the refrigerant flowing out of the plurality of return branch channels 3412. Therefore, the main inlet channel 342 and the main return channel 343 are more critical, and if block welding occurs, it will cause the entire refrigerant heat exchange component 30 to fail. Therefore, the embodiment of the application arranges the second material storage space 3012 adjacent to the main inlet channel 342 and / or the main return channel 343 to reduce the risk of block welding of the main inlet channel 342 and / or the main return channel 343, and improve the welding yield and reliability of the refrigerant heat exchange component 30.

[0180] Please refer to Figure 8 , Figure 8is a sectional view of a partial structure of the refrigerant heat exchange component 30, specifically a sectional view of the refrigerant heat exchange component 30 along the refrigerant heat exchange flow channel 34 and the material containing space 301. In some embodiments, the first plate body 31 includes a body portion 313 and a composite layer 314 disposed on the surface of the body portion 313, the composite layer 314 serving as solder to be welded to the second plate body 32, and the material containing space 301 is capable of containing the solder.

[0181] The body portion 313 can be made of metal, and the melting point of the composite layer 314 is lower than that of the body portion 313. For example, the composite layer 314 can be an aluminum layer. The first plate body 31 and the second plate body 32 can be welded by brazing. During welding, a brazing layer is first applied to the surface of the first plate body 31, and then the first plate body 31 and the second plate body 32 are stacked and welded, and the composite layer 314 serves as solder to fixedly connect the first plate body 31 and the second plate body 32.

[0182] The material containing space 301 is capable of containing part of the excess solder to block the flow of the solder towards the refrigerant heat exchange flow channel 34, thereby reducing the risk of blockage of the refrigerant heat exchange flow channel 34.

[0183] In other embodiments, the surface of the second plate body 32 can also be provided with a composite layer 314, and the composite layer 314 on the second plate body 32 can also serve as solder, and the material containing space 301 is also capable of containing excess solder.

[0184] In other embodiments, the first plate body 31 and the second plate body 32 can also be welded by other solder, and the containing space is also capable of containing the solder.

[0185] In some embodiments, the box body 10 includes a box body 12 and an upper cover 11, and the two ends of the box body 12 are respectively provided with openings, and the upper cover 11 and the refrigerant heat exchange component 30 cover the openings at the two ends of the box body 12, respectively, and the refrigerant heat exchange component 30 is bonded to the battery monomer assembly 20 by a heat-conducting adhesive.

[0186] The refrigerant heat exchange component 30 is disposed at the bottom of the box body 10 and the plurality of battery monomer assemblies 20, and the refrigerant heat exchange component 30 can be used as the bottom plate of the box body 10, thereby simplifying the structure of the battery device 100 and helping to save vehicle space.

[0187] The refrigerant heat exchange component 30 is bonded to the battery monomer assembly 20 by a heat-conducting adhesive, and the refrigerant heat exchange component 30 can directly exchange heat with the battery monomer assembly 20, thereby achieving high heat exchange efficiency and high heat exchange effect, and effectively improving the reliability of the battery device 100.

[0188] The battery device 100 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 battery device during use, so that the refrigerant heat exchange component 30 is less likely to be deformed by collision.

[0189] In other embodiments, the refrigerant heat exchange component 30 can also be arranged inside or outside the box body 12 as long as it can exchange heat with the battery monomer assembly 20.

[0190] In some embodiments, the refrigerant in the refrigerant heat exchange flow channel is a phase change working medium.

[0191] The refrigerant can be a phase change working medium, which can be in a gas-liquid two-phase state during flow. The refrigerant can be R134A (tetrafluoroethane), R1234YF (tetrafluoropropene), R1233ZD (monochlorotrifluoropropene), etc.

[0192] The refrigerant heat exchange component 30 uses refrigerant heat exchange, which can be a direct cooling plate. The direct cooling plate has the advantage of high heat exchange efficiency, but has high requirements for structural strength and welding performance. The refrigerant heat exchange component 30 provided by the embodiments of the present application is provided with a material containing space 301, which can greatly reduce the risk of welding blockage and improve the production yield of the refrigerant heat exchange component 30.

[0193] In some embodiments, the battery device 100 comprises a box body 10, a battery monomer assembly 20 and a refrigerant heat exchange component 30. The battery monomer assembly 20 is arranged in the box body 10, and 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 arranged in layers. The first plate body 31 and the second plate body 32 jointly enclose a refrigerant heat exchange flow channel 34. The first plate body 31 has a welding portion 312, and the welding portion 312 is provided with a material containing space 301. The material containing space 301 is arranged adjacent to the refrigerant heat exchange flow channel 34, and the opening of the material containing space 301 faces the second plate body 32. The second plate body 32 is welded to the welding portion 312. The welding portion 312 is provided with at least one of a material containing groove 3122 and a through hole 3123, and the material containing space 301 is formed in the material containing groove 3122 and / or the through hole 3123. The first plate body 31 has a flow channel region 31a and a peripheral region 31b arranged outside the flow channel region 31a. The material containing space 301 comprises a first material containing space 3011 arranged in the peripheral region 31b, and / or a second material containing space 3012 arranged in the flow channel region 31a. The battery device 100 provided by the embodiments of the present application reduces the risk of welding blockage of the refrigerant heat exchange component 30, improves the welding yield of the refrigerant heat exchange component 30, reduces the manufacturing cost of the refrigerant heat exchange component 30, and improves the reliability of thermal management and the reliability of the battery device 100.

[0194] The embodiment of the second aspect of the application provides a refrigerant heat exchange component 30, the refrigerant heat exchange component 30 at least includes a first plate body 31 and a second plate body 32 arranged in a stack, the first plate body 31 and the second plate body 32 are combined to form a refrigerant heat exchange flow channel 34, the first plate body 31 has a welding portion 312, the second plate body 32 is welded to the welding portion 312, the welding portion 312 is provided with a material containing space 301, the material containing space 301 has an opening towards the second plate body 32, and the material containing space 301 is arranged adjacent to the refrigerant heat exchange flow channel 34 to block the flow of welding material into the refrigerant heat exchange flow channel 34.

[0195] The refrigerant heat exchange component 30 provided by the embodiment of the application can be the refrigerant heat exchange component in any one of the embodiments of the first aspect.

[0196] The refrigerant heat exchange component 30 provided by the embodiment of the application includes the first plate body 31 and the second plate body 32, by arranging the material containing space 301, the contact area of the first plate body 31 and the second plate body 32 is reduced, and the welding area is correspondingly reduced, at the same time, the material containing space 301 blocks the path of the welding material moving towards the refrigerant heat exchange flow channel 34, and the material containing space 301 can also store excess welding material, the scheme provided by the embodiment of the application reduces the problem of the welding material flowing into the refrigerant heat exchange flow channel 34 to cause blockage, and further reduces the risk of abnormal function of the refrigerant heat exchange component 30 caused by the blockage of the refrigerant heat exchange flow channel 34, improves the welding yield of the refrigerant heat exchange component 30, and reduces the cost of the refrigerant heat exchange component 30.

[0197] The embodiment of the third aspect of the application provides a power utilization device, which includes the battery device 100 provided by the first aspect or the refrigerant heat exchange component 30 provided by the second aspect, and the battery device 100 is used to provide electric energy.

[0198] The power utilization device can be a device or a system using the battery device 100.

[0199] The above embodiments are only used to illustrate the technical solutions of the application, rather than limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; 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 application, and should be included in the protection scope of the 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 configured to exchange heat with the battery cell assembly, the refrigerant heat exchange component comprising at least a first plate body and a second plate body arranged in a stack, the first plate body and the second plate body jointly defining a refrigerant heat exchange flow channel, the first plate body having a welding portion, the second plate body being welded to the welding portion, the welding portion being provided with a material containing space, the material containing space having an opening facing the second plate body, the material containing space being arranged adjacent to the refrigerant heat exchange flow channel to block the flow of the welding material into the refrigerant heat exchange flow channel.

2. The battery device according to claim 1, wherein the welding portion comprises a plurality of spaced apart connection regions, at least one of the connection regions being provided with the material containing space; on one side of the refrigerant heat exchange flow channel, the material containing space separates the connection region into a first region and a second region distributed along a predetermined direction, the first region being located between the refrigerant heat exchange flow channel and the material containing space, and the material containing space is used to block the flow of the welding material from the second region to the first region.

3. The battery device of claim 2, wherein along the predetermined direction, the width of the first region is less than or equal to the width of the second region.

4. The battery device according to any one of claims 1 to 3, wherein one side of the first plate body facing the second plate body is concave with a flow channel portion, and the flow channel portion and the second plate body jointly define the refrigerant heat exchange flow channel.

5. The battery device according to any one of claims 1-4, wherein the material containing space and the part of the refrigerant heat exchange flow channel adjacent to the material containing space have a predetermined distance, and the predetermined distance is less than or equal to 35 mm.

6. The battery device of claim 5, wherein the predetermined distance ranges from 5 mm to 20 mm.

7. The battery device of any one of claims 1-6, wherein, the welding portion is provided with a material containing groove, and the material containing space is formed inside the material containing groove.

8. The battery device of claim 7, wherein the material containing groove is in a strip shape, and the material containing groove extends along the part of the refrigerant heat exchange flow channel adjacent to the material containing groove.

9. The battery device according to claim 7 or 8, wherein the width of the material containing groove ranges from 5 mm to 20 mm, and / or the depth of the material containing groove ranges from 2 mm to 3 mm.

10. The battery device of any one of claims 1-9, wherein, the width of the refrigerant heat exchange flow channel ranges from 5 mm to 20 mm, and / or the depth of the refrigerant heat exchange flow channel ranges from 2 mm to 3 mm.

11. The battery device of any one of claims 1-10, wherein, the welding portion is provided with a through hole, and the material containing space is formed inside the through hole.

12. The battery device of claim 11, wherein, the through hole is circular, and the diameter of the through hole ranges from 3 mm to 15 mm.

13. The battery device of any one of claims 1-12, wherein, the welding portion is provided with at least one of the material containing groove and the through hole, and the material containing space is formed inside the material containing groove and / or the through hole.

14. The battery device of any one of claims 1-13, wherein, the first plate body has a flow channel region and a peripheral region arranged outside the flow channel region, the refrigerant heat exchange flow channel is located in the flow channel region, and the welding portion is arranged in both the flow channel region and the peripheral region; the material containing space comprises a first material containing space, and the first material containing space is arranged in the peripheral region.

15. The battery device according to claim 14, wherein along the length direction of the first plate body, the first material containing space is arranged on one side of the first plate body, and the distance from the first material containing space to the refrigerant heat exchange flow channel is less than the distance from the first material containing space to the edge of the first plate body; and / or The first material containing space is arranged on one side of the first plate body along the width direction of the first plate body, and the distance from the first material containing space to the refrigerant heat exchange flow channel is smaller than the distance from the first material containing space to the edge of the first plate body.

16. The battery device according to claim 14 or 15, wherein The first material containing space extends along the edge of the flow channel region; and / or The number of the first material containing spaces is plural, and the plural first material containing spaces are arranged along the edge of the flow channel region.

17. The battery device of any one of claims 14-16, wherein, The material containing space further comprises one or more second material containing spaces arranged in the flow channel region.

18. The battery device of claim 17, wherein, The refrigerant heat exchange flow channel comprises plural parallel arranged sub-flow channels, the sub-flow channels comprise an inflow branch flow channel, an outflow branch flow channel and plural sub-flow channels connected between the inflow branch flow channel and the outflow branch flow channel, the plural sub-flow channels are sequentially connected, the sub-flow channels extend along a first direction and the plural sub-flow channels are arranged along a second direction intersecting the first direction; The inflow branch flow channel and / or the outflow branch flow channel are arranged adjacent to the second material containing space.

19. The battery device of claim 18, wherein, Plural second material containing spaces are arranged between at least two adjacent inflow branch flow channels; and / or Plural second material containing spaces are arranged between the inflow branch flow channel and the outflow branch flow channel.

20. The battery device of claim 18 or 19, wherein, The refrigerant heat exchange flow channel further comprises a main inflow channel and a main outflow channel, the main inflow channel is connected with the plural inflow branch flow channels, and the main outflow channel is connected with the plural outflow branch flow channels; The main inflow channel and / or the main outflow channel are arranged adjacent to the second material containing space.

21. The battery device of any one of claims 1-20, wherein, The first plate body comprises a body portion and a composite layer arranged on the surface of the body portion, the composite layer is welded with the second plate body as solder, and the material containing space is capable of containing the solder.

22. The battery device of any one of claims 1-20, wherein, The box body comprises a box body and an upper cover, both ends of the box body are respectively provided with openings, the upper cover and the refrigerant heat exchange component cover the openings at both ends of the box body respectively, and the refrigerant heat exchange component is bonded with the battery monomer assembly through a heat conductive adhesive.

23. The battery device of any one of claims 1-22, wherein, The refrigerant in the refrigerant heat exchange flow channel is a phase change working medium.

24. A refrigerant heat exchange component, comprising: The refrigerant heat exchange component at least comprises a first plate body and a second plate body arranged in layers, the first plate body and the second plate body jointly enclose a refrigerant heat exchange flow channel, the first plate body has a welding portion, the second plate body is welded and connected to the welding portion, the welding portion is provided with a material containing space, the material containing space has an opening facing the second plate body, and the material containing space is arranged adjacent to the refrigerant heat exchange flow channel to block the flow of the solder towards the refrigerant heat exchange flow channel.

25. An electrical device, comprising: The battery device according to any one of claims 1-23 is used to provide electric energy.

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