Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device. The battery device comprises a box body; a battery cell assembly accommodated in the case; the heat exchange assembly is accommodated in the box body so as to exchange heat with the battery monomer assembly, and the heat exchange assembly comprises a heat exchange main body which comprises a plurality of heat exchange runners extending along a first direction; the flow collecting structures are arranged at the two ends, located in the first direction, of the heat exchange body, each flow collecting structure comprises a blocking piece, a flow collecting piece and an adapting piece, the blocking pieces block at least one heat exchange runner, the flow collecting pieces are provided with flow collecting cavities, the flow collecting pieces are in sealing fit with the heat exchange body through the adapting pieces and are connected with the heat exchange body through the adapting pieces, and the flow collecting pieces are provided with communicating openings communicating with the flow collecting cavities; the communicating port can be used for entering and exiting heat exchange media; the adapter is formed on the heat exchange body, the plugging piece is provided with a side face close to the flow collecting piece, and the side face is provided with a containing groove. According to the utility model, the connection reliability can be improved, the risk that the overflow material overflows to the heat exchange main body in the adapter forming process can be reduced, and the reliability of the battery device is improved.

Description

[0001] Cross-reference to related applications

[0002] This application is based on and claims priority to Chinese patent applications No. 202420869133.1, filed on April 24, 2024, and No. 202410501046.5, filed on April 24, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Technology

[0004] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, the battery pack, as the power source, plays an irreplaceable and crucial role. A battery pack consists of a casing and multiple battery cells housed within it. During continuous charging and discharging, the battery cells generate a significant amount of heat. Heat exchange components are typically installed inside the battery pack to regulate its internal temperature. However, the reliability of these heat exchange components greatly affects the overall reliability of the battery pack. Therefore, improving the reliability of battery packs has become one of the most pressing issues to be addressed. Utility Model Content

[0005] This application provides a battery device and an electrical device that can effectively improve the reliability of heat exchange components, thereby improving the reliability of the battery device and the electrical device.

[0006] In a first aspect, embodiments of this application provide a battery device, comprising: a housing; a battery cell assembly housed within the housing; and a heat exchange assembly housed within the housing for heat exchange with the battery cell assembly. The heat exchange assembly includes: a heat exchange body comprising a plurality of heat exchange channels extending along a first direction; and a flow collection structure disposed at both ends of the heat exchange body in the first direction. The flow collection structure includes a sealing member, a flow collector, and a connecting member. The sealing member seals at least one heat exchange channel, and the flow collector has a flow collection cavity. The flow collector is sealed and connected to the heat exchange body via the connecting member, thereby connecting the flow collection cavity and the heat exchange channels. The flow collector has a connecting port connecting the flow collection cavity, which can be used for the inlet and outlet of heat exchange medium, allowing the heat exchange medium to flow between the flow collection cavity and the heat exchange channels. The connecting member is formed on the heat exchange body, and the sealing member has a side near the flow collector, with a receiving groove on the side configured to receive overflow material forming the connecting member.

[0007] In the technical scheme, the heat exchange assembly is provided with the heat exchange main body and the flow collecting structure, and the flow collecting structure is provided with the blocking member, the flow collecting member and the adapter. When the heat exchange main body is connected with the flow collecting structure, the adapter is formed on the heat exchange main body, and then the flow collecting member is connected. In this way, the flow collecting member is not directly connected with the heat exchange main body, the adapter can easily adapt to the size and shape of the heat exchange main body in the forming process, and the size and shape of the flow collecting member can be matched in advance. Therefore, the installation difficulty among the heat exchange main body, the flow collecting member and the adapter can be reduced, the connection reliability can be improved, the risk of leakage can be reduced, and the reliability of the battery device can be improved. In the process of forming the adapter on the heat exchange main body, the accommodation groove can be used to accommodate the overflow material for forming the adapter. Therefore, the risk of overflow material overflowing to the heat exchange main body and / or the flow collecting member can be reduced, the phenomenon of residual material on the surface of the heat exchange main body and / or the flow collecting member can be improved, the probability of the surface of the heat exchange main body and / or the flow collecting member being poor in flatness and causing poor fit between the heat exchange assembly and the battery monomer assembly and affecting the heat exchange efficiency of the battery monomer assembly can be reduced, and the reliability of the battery device can be further improved.

[0008] In some embodiments of the present application, the accommodation grooves are multiple and are long strip-shaped grooves, and the multiple accommodation grooves are arranged side by side and spaced apart on the side surface.

[0009] In the technical scheme, by increasing the number of accommodation grooves, the volume for storing overflow material can be increased, more overflow material can be accommodated, and the risk of overflow material can be reduced. The multiple accommodation grooves are also dispersed to increase the coverage, which can collect overflow material from multiple positions, expand the range of overflow material collection, and also help to reduce the risk of overflow material spreading to the surface of the heat exchange main body and the flow collecting member, reduce the probability of the surface of the heat exchange main body or the flow collecting member being uneven after the adapter is formed, improve the heat exchange reliability of the heat exchange assembly to the battery monomer assembly, and further improve the reliability of the battery device.

[0010] In some embodiments of the present application, the blocking member abuts against the inner wall of the heat exchange flow channel in the second direction, and a gap is formed between the blocking member and the inner wall of the heat exchange flow channel in the third direction. The gap is configured to accommodate overflow material for forming the adapter, and the third direction, the second direction and the first direction are perpendicular to each other.

[0011] In the technical scheme, by abutting the blocking member against the inner wall of the heat exchange flow channel in the second direction, the risk of displacement or loosening of the blocking member in the heat exchange flow channel can be reduced, and the connection reliability of the blocking member and the heat exchange main body can be improved. The gap can further accommodate overflow material for forming the adapter, which can enhance the storage capacity of overflow material, help to further reduce the risk of residual overflow material on the surface of the heat exchange main body and / or the flow collecting member, improve the heat exchange reliability of the heat exchange assembly to the battery monomer assembly, and further improve the reliability of the battery device.

[0012] In some embodiments of the present application, the heat exchange body has a dimension in the second direction smaller than a dimension in the third direction. In the above technical solution, the heat exchange body can form a plate-shaped structure with a relatively small thickness, which is more easily attached to the surface of the battery monomer assembly for heat exchange, is conducive to saving space inside the box, can provide a larger arrangement space for the battery monomer assembly, improve the energy density of the battery device, and can also provide a larger arrangement space for other electrical components, facilitate the installation of internal components of the box, reduce the installation difficulty, and be conducive to maintenance and repair. The use of the above structure can also enable the blocking member to support the heat exchange flow channel when the heat exchange body is stressed, reduce the probability of large deformation of the heat exchange body, reduce the risk of damage to the heat exchange body, thereby reducing the risk of affecting the heat exchange efficiency of the heat exchange flow channel due to the reduction of the flow channel cross section, and improving the heat exchange reliability of the heat exchange body, providing a more stable working environment for the battery monomer assembly, and thereby improving the reliability of the battery device.

[0013] In some embodiments of the present application, the blocking member has a circumferential surface arranged around the first direction, and the circumferential surface is provided with a groove, and the groove is in communication with the gap. In this technical solution, the groove is in communication with the gap, which can further be used to accommodate the overflow material forming the adapter, and the groove, the gap and the accommodation groove can collectively accommodate more overflow material, which can further reduce the probability of overflow material overflowing onto the surface of the heat exchange body and / or the current collecting member when the adapter is formed, further reduce the probability of poor flatness of the surface of the heat exchange body and / or the current collecting member, thereby further improving the heat exchange effect of the heat exchange assembly on the battery monomer assembly and improving the reliability of the battery device.

[0014] In some embodiments of the present application, the groove is an annular structure arranged around the first direction. In this technical solution, the overflow material can enter the groove through the gap during the forming of the adapter in the heat exchange body. Since the groove is an annular structure, the overflow material can form a seal between the circumferential surface of the blocking member and the inner wall of the heat exchange flow channel, reducing the problem that the overflow material enters the heat exchange flow channel where the blocking member is located, causing the adapter to be poorly formed. This can improve the forming reliability of the adapter, thereby improving the reliability of the heat exchange assembly and the reliability of the battery device.

[0015] In some embodiments of the present application, the accommodation groove extends towards the side close to the gap and forms an opening in the circumferential surface, and the opening is in communication with the gap. In this technical solution, the accommodation groove is in communication with the gap through the opening, so that the accommodation groove, the gap and the groove are in communication, and the overflow material can be fully filled in the accommodation groove, the gap and the groove, and the overflow material can be better collected, reducing the risk that part of the overflow material cannot be filled in the accommodation groove, the gap and the groove, causing the overflow material to overflow onto the heat exchange body and / or the current collecting member.

[0016] In some embodiments of the present application, in the first direction, the size of the blocking piece is L1, and the distance between the groove and the side surface is L2, wherein L2 < 1 / 2L1. In this technical solution, by setting the distance between the groove and the side surface and the size of the blocking piece within the above range, the groove is arranged closer to the side surface, which can reduce the flow path of the overflow into the groove, reduce the flow resistance, and facilitate the overflow into the groove.

[0017] In some embodiments of the present application, the heat exchange main body comprises a shell and a plurality of partitions, both ends of the shell in the first direction are open, the size of the shell in the second direction is smaller than the size of the shell in the third direction, the third direction, the second direction and the first direction are perpendicular to each other, the partitions are arranged in the shell, the partitions are arranged obliquely relative to the second direction, and the heat exchange flow channels are formed between the partitions and the shell wall of the shell and between any two adjacent partitions.

[0018] In the above technical solution, by arranging the heat exchange main body to comprise a shell and a plurality of partitions, the heat exchange main body as a whole can form a shell-shaped structure with a relatively small thickness, which has a relatively high heat exchange effect while having a relatively small volume, thereby saving the space inside the box. The partitions can also form inclined ribs inside the shell, which can improve the overall strength of the heat exchange main body, reduce the risk of large deformation of the shell, improve the reliability of the heat exchange main body, and further improve the reliability of the battery device.

[0019] In some embodiments of the present application, the shell and the partitions are integrally formed. In this technical solution, the shell and the partitions are integrally formed, which can reduce the number of parts and the assembly steps, thereby improving the production efficiency. The above solution can also improve the overall strength and rigidity of the heat exchange main body, reduce the risk of large deformation or damage of the heat exchange main body, improve the use reliability of the heat exchange main body, and further improve the reliability of the heat exchange assembly, thereby improving the reliability of the battery device.

[0020] In some embodiments of the present application, on a cross-sectional surface perpendicular to the first direction, the cross-sectional shape of the heat exchange flow channel is the same as the cross-sectional shape of the blocking piece.

[0021] In the above technical solution, by making the cross-sectional shape of the heat exchange flow channel the same as the cross-sectional shape of the blocking piece, the inner walls of the blocking piece and the heat exchange flow channel can be well fitted, which is conducive to the sealing of the blocking piece in the heat exchange flow channel, can reduce the risk of gaps, and also allows the blocking piece to uniformly bear pressure in all directions in the heat exchange flow channel, which is also conducive to maintaining the sealing state between the inner walls of the blocking piece and the heat exchange flow channel. Since the cross-sectional shape of the heat exchange flow channel is the same as the cross-sectional shape of the blocking piece, the blocking piece can also play a supporting role inside the heat exchange flow channel, which reduces the risk of large deformation of the heat exchange main body due to stress, is conducive to reducing the risk of reduction of the flow cross section of the heat exchange flow channel, and can improve the heat exchange reliability of the heat exchange main body.

[0022] In some embodiments of the present application, the plurality of accommodating grooves are long strip-shaped grooves, the plurality of accommodating grooves are arranged side by side and spaced apart, and the extension direction of the accommodating grooves is parallel to the partition plate, and the accommodating grooves extend through the blocking member along the extension direction.

[0023] In the above technical solution, by increasing the number of accommodating grooves, the volume of the overflow material storage can be increased, more overflow materials can be accommodated, the risk of overflow can be reduced, and the overflow can be collected from multiple positions to expand the overflow collection range and reduce the risk of the overflow spreading to the surface of the heat exchange main body and the current collecting member. With the above solution, the overflow material can reach the edge position of the heat exchange runner located at both ends of the partition plate along the extension direction after entering the accommodating groove. The overflow material can play a sealing role between the blocking member and the edge position, reducing the risk of gaps between the blocking member and the heat exchange runner, reducing the probability of the heat exchange runner being blocked by the blocking member, and allowing the heat exchange medium to flow in the expected heat exchange runner of the heat exchange main body to improve the reliability of the heat exchange assembly.

[0024] In some embodiments of the present application, the adapter is injection molded on the heat exchange main body. In this technical solution, the adapter is injection molded on the heat exchange main body, which has a faster molding speed, is easy to mass-produce automatically, and can improve production efficiency. This way can also make the adapter have higher dimensional accuracy and higher surface quality, improve the molding quality of the adapter, improve the connection reliability between the heat exchange main body, the adapter and the current collecting member, and further improve the reliability of the battery device.

[0025] In some embodiments of the present application, the heat exchange main body is a metal material or a non-metal material; and / or, the current collecting member is a metal material or a non-metal material. In this technical solution, the heat exchange main body made of metal material can have better thermal conductivity, which is conducive to improving the heat exchange efficiency. The heat exchange main body can also be made of non-metal material, which can reduce the cost while meeting the thermal conductivity performance. The current collecting member made of metal material can have higher rigidity and strength, reducing the risk of damage. The current collecting member made of non-metal material can reduce the cost while meeting the rigidity and strength. By setting the heat exchange main body and the current collecting member to the above materials, more choices can be provided, and higher flexibility can be provided.

[0026] In a second aspect, the embodiments of the present application provide a power utilization device, which comprises the battery device according to any one of the preceding embodiments, and the battery device is used to store or provide electric energy.

[0027] In the above technical solution, since the battery device has high reliability, the use of the battery device to store or provide electric energy can improve the power utilization reliability, and further improve the use reliability of the power utilization device. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those of ordinary skill in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0029] Figure 1 The power utilization device provided by some embodiments of the present application is a structural schematic diagram of a vehicle;

[0030] Figure 2 The structural explosion diagram of the battery device provided by some embodiments of the present application;

[0031] Figure 3 The partial structural schematic diagram of the battery device provided by some embodiments of the present application;

[0032] Figure 4 The exploded view of the heat exchange assembly provided by some embodiments of the present application;

[0033] Figure 5 The I of Figure 4 is a partial enlarged schematic diagram;

[0034] Figure 6 The partial structural sectional view of the heat exchange assembly provided by some embodiments of the present application;

[0035] Figure 7 The perspective structural schematic diagram of the plugging member provided by some embodiments of the present application;

[0036] Figure 8 The side view of the plugging member provided by some embodiments of the present application;

[0037] Figure 9 The front view of the plugging member provided by some embodiments of the present application;

[0038] Figure 10 The internal structural schematic diagram of the heat exchange assembly provided by some embodiments of the present application;

[0039] Figure 11 The II of Figure 10 is a partial enlarged schematic diagram;

[0040] Figure 12 The front view of the heat exchange body provided by some embodiments of the present application.

[0041] The icon:

[0042] 1000, power utilization device;

[0043] 100, battery device;

[0044] 10, box; 11, first box body; 12, second box body;

[0045] 20, battery cell assembly; 21, battery cell;

[0046] 30, heat exchange assembly;

[0047] 31, heat exchange body; 301, heat exchange flow channel; 311, shell; 311a, arc-shaped wall; 312, partition plate;

[0048] 32, current collecting structure; 321, blocking piece; 321a, side surface; 321b, accommodating groove; 321c, circumferential surface; 321d, groove; 321e, opening; 322, current collecting piece; 3221, current collecting cavity; 322a, communication port; 323, adapter; 324, gap;

[0049] 200, controller; 300, motor; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0050] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0051] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing the 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. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, not to describe a particular order or primary and secondary relationship.

[0052] In the present application, the phrase "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments.

[0053] In the description of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "mount", "connected", "connection", "attach" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] The term "and / or" in the present application is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents that the front and rear associated objects have an "or" relationship.

[0055] In the embodiments of the present application, the same reference signs represent the same components, and for the sake of brevity, the detailed description of the same components is omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, and the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation on the present application.

[0056] "Multiple" appearing in the present application means two or more (including two).

[0057] In the present application, the battery cell can include a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc. The present application embodiments are not limited thereto. The battery cell can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc. The present application embodiments are also not limited thereto. The battery cell is generally divided into three types according to the packaging method: cylindrical battery cell, square battery cell and soft package battery cell, and the present application embodiments are also not limited thereto.

[0058] The battery apparatus mentioned in the embodiments of the present application can refer to 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, parallel or mixed connection through a busbar component. In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells.

[0059] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing a plurality of battery cells into one independent module. As an example, the battery module can be formed by bundling a plurality of battery cells by a cable tie.

[0060] In some embodiments, the battery device can be a battery pack, which includes a box and one or more battery cell assemblies accommodated in the box. 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. As an example, the battery cell assembly can also be accommodated in the box by fixing a plurality of battery cells directly in the box. The box can prevent liquid or other foreign matters from affecting the charging or discharging of the battery cells.

[0061] The battery cell includes a housing, an electrode assembly, and an electrolyte, and the housing is used to accommodate the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode tab, a negative electrode tab, and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode tab and the negative electrode tab to work. The positive electrode tab includes a positive current collector and a positive active material layer, and the positive active material layer is coated on the surface of the positive current collector. The positive current collector without the positive active material layer protrudes from the positive current collector with the positive active material layer, and the positive current collector without the positive active material layer serves as a positive electrode tab. Taking a lithium ion battery as an example, the material of the positive current collector can be aluminum, and the positive active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The negative electrode tab includes a negative current collector and a negative active material layer, and the negative active material layer is coated on the surface of the negative current collector. The negative current collector without the negative active material layer protrudes from the negative current collector with the negative active material layer, and the negative current collector without the negative active material layer serves as a negative electrode tab. The material of the negative current collector can be copper, and the negative active material can be carbon or silicon, etc. In order to ensure that no fuse occurs when passing a large current, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0062] The material of the separator can be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly can be a roll structure or a laminated structure, and the embodiments of the present application are not limited thereto.

[0063] In recent years, new energy vehicles have made a leap in development. In the field of electric vehicles, the battery device, as the power source of electric vehicles, plays an irreplaceable important role. The battery device is composed of a box body and a plurality of battery monomers contained in the box body. The battery monomers in the battery device will generate a large amount of heat in the continuous charging and discharging process. Heat exchange components are usually arranged inside the battery device to exchange heat, so as to achieve temperature regulation inside the battery device. However, the reliability of the heat exchange components will greatly affect the reliability of the battery device. Therefore, how to further improve the reliability of the battery device has become one of the problems to be solved at present.

[0064] In a general battery device, a cold plate is usually arranged inside the box body to exchange heat with the battery monomer assembly. The cold plate is connected to the pipeline for the heat exchange medium in and out through the current collector. Among them, the cold plate and the current collector are two independent components, both of which are metal materials and are connected by brazing process. However, the size and surface flatness of the cold plate are difficult to control, the cold plate and the current collector cannot be well fitted, and the welding quality will be affected during welding, which will cause the leakage risk between the cold plate and the current collector, affect the heat exchange reliability of the cold plate, and the leaked heat exchange medium entering the box body will also easily cause electrical safety hazards such as short circuit, thereby affecting the overall reliability of the battery device.

[0065] Based on the above consideration, in order to solve the problem that the reliability of the heat exchange component is affected during installation, thereby affecting the reliability of the battery device. The applicant designs a battery device, which comprises: a box body, a battery monomer assembly and a heat exchange component; the battery monomer assembly is received in the box body; the heat exchange component is received in the box body to exchange heat with the battery monomer assembly, the heat exchange component comprises: a heat exchange main body comprising a plurality of heat exchange flow channels extending along a first direction; a current collecting structure is arranged at both ends of the heat exchange main body in the first direction, the current collecting structure comprises a blocking piece, a current collecting piece and an adapter, the blocking piece blocks at least one heat exchange flow channel, the current collecting piece is internally provided with a current collecting cavity, the current collecting piece is sealingly connected with the heat exchange main body through the adapter, so that the current collecting cavity and the heat exchange flow channel are communicated, the current collecting piece is provided with a communication port communicating with the current collecting cavity, the communication port is used for the heat exchange medium to flow in and out, so that the heat exchange medium can flow between the current collecting cavity and the heat exchange flow channel; wherein the adapter is formed on the heat exchange main body, the blocking piece has a side surface close to the current collecting piece, the side surface is provided with a receiving groove, and the receiving groove is configured to receive the excess material forming the adapter.

[0066] In the battery device with the above structure, by setting the heat exchange assembly to include the heat exchange body and the current collecting structure, and the current collecting structure including the blocking piece, the current collecting piece and the adapter piece, when the heat exchange body is connected with the current collecting structure, the adapter piece is formed on the heat exchange body, and then the current collecting piece is connected, so that the current collecting piece is not directly connected with the heat exchange body, the adapter piece can more easily adapt to the size and shape of the heat exchange body in the forming process, and the size and shape of the current collecting piece can be matched in advance, thereby reducing the installation difficulty between the heat exchange body, the current collecting piece and the adapter piece, improving the connection reliability, reducing the risk of leakage, and improving the reliability of the battery device. In the process of forming the adapter piece on the heat exchange body, the accommodating groove can be used to accommodate the overflow material forming the adapter piece, thereby reducing the risk of overflow of the overflow material to the heat exchange body and / or the current collecting piece, improving the phenomenon of residual material on the surface of the heat exchange body and / or the current collecting piece, and reducing the probability that the surface of the heat exchange body and / or the current collecting piece is poor in flatness, resulting in poor fit of the heat exchange assembly with the battery monomer assembly, thereby affecting the heat exchange efficiency of the battery monomer assembly, and further improving the reliability of the battery device.

[0067] The battery device disclosed in the embodiments of the present application can be used in, but is not limited to, an electric device such as a vehicle, a ship or an aircraft. The power supply system of the electric device can be composed of the battery device disclosed in the present application, so that the application range of the battery device is improved.

[0068] The embodiments of the present application provide an electric device using the battery device as a power supply. The electric device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy and an electric aircraft toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle and a spacecraft, etc.

[0069] In order to facilitate the description, the following embodiments take a vehicle as an example to describe a kind of electric device 1000 of an embodiment of the present application. Please refer to Figure 1 , Figure 1 The electric device 1000 provided by some embodiments of the present application is a structural schematic diagram of a vehicle. The vehicle can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric vehicle, a hybrid electric vehicle or a range extended vehicle, etc. The vehicle is internally provided with a battery device 100, which can be arranged at the bottom, head or tail of the vehicle. The battery device 100 can be used for power supply of the vehicle, for example, the battery device 100 can be used as the operating power supply of the vehicle. The vehicle can also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the working power demand of the vehicle during starting, navigation and driving.

[0070] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0071] Please refer to Figure 2 , Figure 2 This is an exploded view of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 10 and a plurality of battery cells 21, which are housed within the housing 10. The housing 10 provides assembly space for the battery cells 21, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first housing body 11 and a second housing body 12, which overlap each other, and together define an assembly space for accommodating the battery cells 21. The second housing body 12 may be a hollow structure open at one end, and the first housing body 11 may be a plate-like structure, with the first housing body 11 covering the open side of the second housing body 12 so that the first housing body 11 and the second housing body 12 together define the assembly space; alternatively, the first housing body 11 and the second housing body 12 may both be hollow structures open on one side, with the open side of the first housing body 11 covering the open side of the second housing body 12. Of course, the box 10 formed by the first box body 11 and the second box body 12 can be of various shapes, such as cylinder, cuboid, etc.

[0072] In the battery device 100, multiple battery cells 21 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 21 are connected in both series and parallel configurations. Multiple battery cells 21 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 21 is housed within the housing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 21 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 21.

[0073] Please refer to Figure 2 , Figure 2 The following is an exploded view of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes multiple rows of battery cells 21, which are arranged along the length of the housing 10. Each row of battery cells 21 includes multiple battery cells 21 arranged along the width of the housing 10; or, the multiple rows of battery cells 21 are arranged along the width of the housing 10, and each row of battery cells 21 includes multiple battery cells 21 arranged along the length of the housing 10.

[0074] Each battery cell 21 can be a secondary battery or a primary battery, where a secondary battery refers to a battery cell 21 that can be used continuously after being discharged by means of charging to activate the active material; it can also be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc. The embodiments of the present application are not limited thereto. The battery cell 21 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc. For example, in the embodiments of the present application, the shape of the battery cell 21 is a cuboid. Figure 2

[0075] According to some embodiments of the present application, with reference to Figures 3 to 7 , the embodiments of the present application provide a battery device 100, comprising a box body 10, a battery cell assembly 20, and a heat exchange assembly 30. The battery cell assembly 20 is accommodated in the box body 10; the heat exchange assembly 30 is accommodated in the box body 10 to exchange heat with the battery cell assembly 20, and the heat exchange assembly 30 comprises a heat exchange main body 31 and a current collecting structure 32. The heat exchange main body 31 comprises a plurality of heat exchange flow channels 301 extending along a first direction X; the current collecting structure 32 is arranged at both ends of the heat exchange main body 31 in the first direction X, and the current collecting structure 32 comprises a blocking piece 321, a current collecting piece 322, and an adapter 323. The blocking piece 321 blocks at least one heat exchange flow channel 301; the current collecting piece 322 is provided with a current collecting cavity 3221; the current collecting piece 322 is sealingly connected with the heat exchange main body 31 through the adapter 323, so that the current collecting cavity 3221 and the heat exchange flow channel 301 are in communication; the current collecting piece 322 is provided with a communication port 322a communicating with the current collecting cavity 3221, and the communication port 322a can be used for the inlet and outlet of the heat exchange medium, so that the heat exchange medium can flow between the current collecting cavity 3221 and the heat exchange flow channel 301; wherein the adapter 323 is formed on the heat exchange main body 31, and the blocking piece 321 has a side surface 321a close to the current collecting piece 322, and the side surface 321a is provided with a receiving groove 321b configured to accommodate the excess material forming the adapter 323.

[0076] The box body 10 can refer to the external structure of the battery device 100, and provide physical protection for the components inside the battery device 100, such as the battery cell assembly 20, the heat exchange assembly 30, etc. The material of the box body 10 can include but is not limited to metal material or composite material, etc., wherein the metal material can include but is not limited to aluminum alloy or steel, etc., and the composite material can include but is not limited to carbon fiber reinforced composite material, glass fiber reinforced composite material, etc. The shape of the box body 10 can also include but is not limited to a cuboid, a square, or a cylinder, etc.

[0077] The battery cell assembly 20 can refer to an assembly comprising one or more battery cells 21. When the battery cell 21 is multiple, the multiple battery cells 21 can be but are not limited to series connection, parallel connection, or series-parallel connection, etc. ​

[0078] The heat exchange assembly 30 can refer to a structure or component for regulating the temperature of the battery cell assembly 20 to ensure the normal operation of the battery cell assembly 20. The heat exchange assembly 30 can be one or more, and can be arranged on the surface of one or two battery cells 21 at the outermost side of the battery cell assembly 20, or between any two adjacent groups of battery cells 21. For example, referring to Figure 3 , the battery cell assembly 20 can include two battery cells 21, and the heat exchange assembly 30 can be three, two heat exchange assemblies 30 arranged on the outermost surface of the two battery cells 21, and one heat exchange assembly 30 arranged between the two battery cells 21.

[0079] The heat exchange body 31 can refer to a pipe-shaped component or a hollow structural member that can flow through the heat exchange medium. The heat exchange flow channel 301 can refer to a flow channel formed inside the heat exchange body 31 for flowing through the heat exchange medium, and can extend through the heat exchange body 31 along the first direction X. The heat exchange body 31 can be flat, for example, the heat exchange body 31 can be a flat component, or a structure composed of multiple heat exchange pipes arranged side by side. The material of the heat exchange body 31 can include but is not limited to metal, composite or ceramic materials, etc. The metal material can include but is not limited to aluminum alloy, copper alloy, etc. The composite material can include but is not limited to carbon fiber reinforced composite material or graphite-metal composite material, etc. The ceramic material can include but is not limited to aluminum nitride ceramic or beryllium oxide ceramic, etc. The heat exchange medium mentioned in the present application can include but is not limited to water, ethylene glycol solution or mineral oil, silicone oil, etc.

[0080] The current collecting structure 32 is arranged at both ends of the heat exchange body 31 in the first direction X, and can refer to one of the current collecting structures 32 at both ends in the first direction X, which can be used to introduce the heat exchange medium and transport the heat exchange medium into the heat exchange flow channel 301 of the heat exchange body 31, and the other can output the heat exchanged heat exchange medium from the heat exchange flow channel 301 to the external circulation pipeline. Wherein, the first direction X and the second direction Y and the third direction Z mentioned below can refer to one of the length direction, the width direction and the height direction of the heat exchange body 31. For example, the first direction X can refer to the length direction of the heat exchange body 31.

[0081] The blocking member 321 can refer to a component that can block the heat exchange flow channel 301. For example, referring to Figure 6 , the blocking member 321 can be a plug or a plug, which is partially or completely embedded in the heat exchange flow channel 301 to block the heat exchange flow channel 301. The number of blocking members 321 can be one or more, and the number of blocked heat exchange flow channels 301 can be selected to adjust the heat exchange capacity of the heat exchange assembly 30 to meet different use requirements. The material of the blocking member 321 can include but is not limited to wood, rubber or plastic, etc.

[0082] The current collector 322 can refer to the main structure of the current collecting structure 32, which is used to receive the heat exchange medium and flow the heat exchange medium together. Exemplarily, the current collector 322 can be a current collector, and the current collecting cavity 3221 can refer to a cavity structure formed on the current collector 322. Optionally, the current collecting cavity 3221 can be a cavity open to the heat exchange main body 31 side, and the communication port 322a can refer to an inlet and outlet for the heat exchange medium to enter and exit the current collecting cavity 3221. The material of the current collector 322 can include but is not limited to metal material, plastic material, or composite material, etc. The metal material can include but is not limited to aluminum alloy, copper alloy, etc. The plastic material can include but is not limited to polyethylene or polypropylene, etc. The composite material can include but is not limited to carbon fiber reinforced composite material or graphite-metal composite material, etc.

[0083] The adapter 323 can refer to a component for connecting the current collector 322 and the heat exchange main body 31. The adapter 323 can be an annular structure arranged around the first direction X, one end of the adapter 323 is wrapped on the heat exchange main body 31, and the other end is wrapped on the current collector 322. The material of the adapter 323 can include but is not limited to metal material or plastic material, etc. The metal material can include but is not limited to aluminum alloy, copper alloy, etc. The plastic material can include but is not limited to polyethylene or polypropylene, etc.

[0084] The adapter 323 can be formed on the heat exchange main body 31, which can be understood as that the adapter 323 can be formed on the surface of the heat exchange main body 31 to obtain the adapter 323, so that the adapter 323 and the heat exchange main body 31 can be tightly combined to form a whole. The forming mode of the adapter 323 on the heat exchange main body 31 can include but is not limited to injection molding, 3D printing, casting, etc., which is not specifically limited here.

[0085] Since the heat exchange main body 31 and the current collector 322 are usually first manufactured as parts, their sizes or shapes are fixed. If the heat exchange main body 31 and the current collector 322 are directly connected, it is more troublesome to match the sizes, shapes and surface flatness of the two, and there is also a risk of poor fitting, which can affect the connection quality. By forming the adapter 323 on the heat exchange main body 31, the adapter 323 can be manufactured according to the existing size and shape of the heat exchange main body 31, which is easier to manufacture. Through the forming mold of the adapter 323, the adapter 323 can also better adapt to the existing size, shape and surface flatness of the current collector 322, thereby reducing the installation difficulty between the heat exchange main body 31 and the current collector 322. The heat exchange main body 31 connected to the current collector 322 through the adapter 323 can also easily ensure a higher connection quality and improve the connection reliability of the heat exchange main body 31, the adapter 323 and the current collector 322.

[0086] The connection mode of the adapter 323 and the current collecting member 322 can include, but is not limited to, welding, bolt connection, riveting, etc., and is not specifically limited here.

[0087] With reference to Figure 5 and Figure 7 The side surface 321a can refer to an end surface of the blocking member 321 close to the current collecting member 322, and the accommodating groove 321b can refer to a recessed space formed on the side surface 321a of the blocking member 321. Referring to the foregoing, in the process of forming the adapter 323 on the heat exchange main body 31, in order to ensure that it can be fully formed, the required material is generally more than the rated amount, for example, when the adapter 323 is formed by injection molding or casting, slightly more material than the rated amount needs to be added. If the excess material in the adapter 323 forming process spills onto the surface of the heat exchange main body 31 and / or the current collecting member 322, especially the surface of the heat exchange main body 31, since the surface of the heat exchange main body 31 is generally in contact with the surface of the battery monomer 21, the presence of residual excess material on the surface of the heat exchange main body 31 will result in poor flatness, affecting the contact with the surface of the battery monomer 21, and thus affecting the heat exchange effect. The accommodating groove 321b can be used to accommodate the excess material formed by the adapter 323, reducing the risk of excess material spilling onto the surface of the current collecting member 322 or the heat exchange main body 31, and is conducive to ensuring the flatness of the surface of the heat exchange main body 31 and / or the current collecting member 322.

[0088] In the above technical solution, by providing the heat exchange assembly 30 to include the heat exchange main body 31 and the current collecting structure 32, and the current collecting structure 32 including the blocking member 321, the current collecting member 322 and the adapter 323, when the heat exchange main body 31 is connected with the current collecting structure 32, the adapter 323 is formed on the heat exchange main body 31, and then the current collecting member 322 is connected, thereby making the current collecting member 322 not directly connected with the heat exchange main body 31. The adapter 323 can more easily adapt to the size and shape of the heat exchange main body 31 in the forming process, and can pre-match the size and shape of the current collecting member 322, thereby reducing the installation difficulty between the heat exchange main body 31, the current collecting member 322 and the adapter 323, improving the connection reliability, reducing the risk of leakage, and improving the reliability of the battery device 100. In the process of forming the adapter 323 on the heat exchange main body 31, the accommodating groove 321b can be used to accommodate the excess material formed by the adapter 323, thereby reducing the risk of excess material spilling onto the heat exchange main body 31 and / or the current collecting member 322, improving the phenomenon of residual material on the surface of the heat exchange main body 31 and / or the current collecting member 322, and reducing the probability that the surface of the heat exchange main body 31 and / or the current collecting member 322 has poor flatness, resulting in poor contact between the heat exchange assembly 30 and the battery monomer assembly 20, and affecting the heat exchange efficiency of the battery monomer assembly 20, thereby further improving the reliability of the battery device 100.

[0089] In some embodiments of the present application, with reference to Figures 7 to 9The accommodating grooves 321b are multiple and in the shape of long grooves, and are arranged side by side and spaced apart on the side surface 321a.

[0090] In the above technical solution, by increasing the number of accommodating grooves 321b, the volume for storing overflow material can be increased, more overflow material can be accommodated, and the risk of overflow can be reduced. The multiple accommodating grooves 321b are dispersed, which can also increase the coverage, collect overflow material from multiple positions, expand the overflow material collection range, reduce the risk of overflow spreading to the surface of the heat exchange main body 31 and the current collector 322, and reduce the probability of the heat exchange main body 31 or the current collector 322 being uneven after the adapter 323 is formed. The heat exchange assembly 30 can improve the heat exchange reliability of the battery monomer assembly 20, and further improve the reliability of the battery device 100.

[0091] In some embodiments of the present application, referring to Figure 10 and Figure 11 The blocking member 321 abuts against the inner wall of the heat exchange flow channel 301 in the second direction Y, and a gap 324 is formed between the blocking member 321 and the inner wall of the heat exchange flow channel 301 in the third direction Z. The gap 324 is configured to accommodate overflow material for forming the adapter 323. The third direction Z, the second direction Y, and the first direction X are perpendicular to each other.

[0092] The blocking member 321 can be in transition fit or interference fit with the inner wall of the heat exchange flow channel 301 at both ends in the second direction Y, so that the installation of the blocking member 321 in the heat exchange flow channel 301 is more secure.

[0093] The gap 324 is formed between the blocking member 321 and the inner wall of the heat exchange flow channel 301 in the third direction Z. It can be understood that the gap 324 is formed between one end of the blocking member 321 and the inner wall of the heat exchange flow channel 301 in the third direction Z, or the gap 324 is formed between both ends of the blocking member 321 and the inner wall of the heat exchange flow channel 301 in the third direction Z.

[0094] In the above technical solution, by abutting the blocking member 321 against the inner wall of the heat exchange flow channel 301 in the second direction Y, the risk of displacement or loosening of the blocking member 321 in the heat exchange flow channel 301 can be reduced, and the connection reliability of the blocking member 321 and the heat exchange main body 31 can be improved. The gap 324 can further function to accommodate overflow material for forming the adapter 323, and can enhance the ability to store overflow material, which is beneficial to further reduce the risk of residual overflow material on the surface of the heat exchange main body 31 and / or the current collector 322, improve the heat exchange reliability of the heat exchange assembly 30 on the battery monomer assembly 20, and further improve the reliability of the battery device 100.

[0095] In some embodiments of the present application, referring to Figure 5 , Figure 10 and Figure 11The size of the heat exchange body 31 in the second direction Y is smaller than the size of the heat exchange body 31 in the third direction Z.

[0096] The heat exchange body 31 with the above structure can have a rectangular cross section in a cross section perpendicular to the first direction X, and the cross section of the heat exchange body 31 can be a long strip shape (see Figure 10 and Figure 12 ). The heat exchange body 31 with the above structure can be a plate-shaped structural member with a small thickness, a small volume, and can save space. When the heat exchange assembly 30 exchanges heat with the battery cell assembly 20, the end surface of the heat exchange body 31 in the second direction Y can be in close contact with the surface of the battery cell 21 for heat exchange, thereby saving the space inside the box body 10, and a larger volume of the battery cell assembly 20 can be arranged, or other electrical components can be conveniently arranged.

[0097] Referring to the above, the end surface of the heat exchange body 31 in the second direction Y is usually in close contact with the battery cell 21 for heat exchange, and the battery cell 21 is usually a larger surface in contact with the heat exchange body 31, and part of the heat exchange body 31 is also arranged between the adjacent two battery cells 21, so that the end surface of the heat exchange body 31 in the second direction Y is subjected to a larger force. The sealing member 321 can support the heat exchange flow channel 301 to reduce the probability of large deformation of the heat exchange body 31.

[0098] In the above technical solution, the heat exchange body 31 can form a plate-shaped structure with a small thickness, which is easier to be in close contact with the surface of the battery cell assembly 20 for heat exchange, is beneficial to save the space inside the box body 10, can provide a larger arrangement space for the battery cell assembly 20, improve the energy density of the battery device 100, can also provide a larger arrangement space for other electrical components, facilitate the installation of parts inside the box body 10, reduce the installation difficulty, and is beneficial to maintenance and repair. The above structure can also make the sealing member 321 support the heat exchange flow channel 301 to reduce the probability of large deformation of the heat exchange body 31, reduce the risk of damage of the heat exchange body 31, thereby reducing the risk of affecting the heat exchange efficiency of the heat exchange flow channel 301 due to the reduction of the flow channel cross section, improving the heat exchange reliability of the heat exchange body 31, providing a more stable working environment for the battery cell assembly 20, and further improving the reliability of the battery device 100.

[0099] In some embodiments of the present application, reference is made to Figure 4 and Figure 5The size of the heat exchange main body 31 in the third direction Z is smaller than the size of the heat exchange main body 31 in the first direction X. In this technical solution, the heat exchange main body 31 can be a long strip-shaped and thin plate-shaped structural member, can have a higher heat exchange surface, and is suitable for a larger size of the battery monomer 21.

[0100] In some embodiments of the present application, with reference to Figure 7 and Figure 8 The blocking member 321 has a circumferential surface 321c arranged around the first direction X, and the circumferential surface 321c is provided with a groove 321d in communication with the gap 324.

[0101] The circumferential surface 321c can refer to the circumferential surface of the blocking member 321 arranged around the first direction X.

[0102] The groove 321d can refer to a recessed area provided at the position of the circumferential surface 321c of the blocking member 321.

[0103] In the above technical solution, the groove 321d is in communication with the gap 324, which can further be used to accommodate the overflow material forming the adapter 323, and the groove 321d, the gap 324 and the accommodation groove 321b can collectively accommodate more overflow material, which can further reduce the probability of overflow material overflowing to the surface of the heat exchange main body 31 and / or the current collecting member 322 when the adapter 323 is formed, and further reduce the probability of the surface of the heat exchange main body 31 and / or the current collecting member 322 having poor flatness, thereby further improving the heat exchange effect of the heat exchange assembly 30 on the battery monomer assembly 20 and improving the reliability of the battery device 100.

[0104] In some embodiments of the present application, with reference to Figure 7 and Figure 8 The groove 321d is an annular structure arranged around the first direction X.

[0105] In the above technical solution, the adapter 323 is formed in the process of the heat exchange main body 31, and the overflow material can enter the groove 321d through the gap 324. Since the groove 321d is an annular structure, the overflow material can form a seal between the circumferential surface 321c of the blocking member 321 and the inner wall of the heat exchange runner 301, which can improve the blocking and sealing effect of the blocking member 321 on the heat exchange runner 301, and on the other hand, can reduce the overflow material entering the heat exchange runner 301 where the blocking member 321 is located, thereby preventing the adapter 323 from being well formed, improving the forming reliability of the adapter 323, and further improving the reliability of the heat exchange assembly 30 and the reliability of the battery device 100.

[0106] In some embodiments of the present application, with reference to Figure 7 and Figure 11The accommodating groove 321b extends to the side close to the gap 324, and an opening 321e is formed in the circumferential surface 321c, which is in communication with the gap 324.

[0107] During the forming of the adapter 323 on the heat exchange main body 31, a part of the excess material can directly enter the recess 321d through the gap 324, and a part of the excess material can enter the gap 324 through the accommodating groove 321b and the opening 321e, so that the flow path of the excess material is increased, and the excess material can be better collected.

[0108] In the above technical solution, the accommodating groove 321b is in communication with the gap 324 through the opening 321e, so that the accommodating groove 321b, the gap 324 and the recess 321d are in communication, the excess material can be fully filled in the accommodating groove 321b, the gap 324 and the recess 321d, the excess material can be better collected, and the risk that part of the excess material in the accommodating groove 321b, the gap 324 and the recess 321d cannot be filled and causes the excess material to overflow to the heat exchange main body 31 and / or the collecting member 322 is reduced.

[0109] In some embodiments of the present application, referring to Figure 8 In the first direction X, the size of the blocking member 321 is L1, and the distance between the recess 321d and the side surface 321a is L2, where L2 < 1 / 2 L1.

[0110] In the above technical solution, by setting the distance between the recess 321d and the side surface 321a and the size of the blocking member 321 in the above range, the recess 321d is arranged closer to the side surface 321a, which can reduce the flow path of the excess material flowing into the recess 321d, reduce the flow resistance, and facilitate the excess material to enter the recess 321d.

[0111] In some embodiments of the present application, referring to Figure 11 and Figure 12 The heat exchange main body 31 includes a shell 311 and a plurality of partitions 312, the shell 311 is open at both ends in the first direction X, the size of the shell 311 in the second direction Y is smaller than the size of the shell 311 in the third direction Z, the third direction Z, the second direction Y and the first direction X are perpendicular to each other, the plurality of partitions 312 are arranged in the shell 311, and the partitions 312 are arranged obliquely relative to the second direction Y, and the heat exchange flow channels 301 are respectively formed between the partitions 312 and the shell wall of the shell 311 and between any two adjacent partitions 312.

[0112] The partition 312 can be a thin plate member for partitioning inside the shell 311. Optionally, in the first direction X, the size of the partition 312 can be equal to the size of the shell 311, and the partitions 312 at both ends in the second direction Y can be connected to the inner wall of the heat exchange flow channel 301.

[0113] The size of the shell 311 in the second direction Y is smaller than the size of the shell 311 in the third direction Z, so that the shell 311 in the cross section perpendicular to the first direction X is a rectangle, which can be optionally configured as an elongated rectangle. This can make the shell 311 form a shell structure with a relatively small thickness, thereby saving space.

[0114] The partition plate 312 is arranged obliquely relative to the second direction Y. It can be understood that the partition plate 312 not only divides the internal space of the shell 311 to form the heat exchange flow channel 301, but also functions as an inclined rib to improve the overall structural strength and rigidity of the heat exchange main body 31.

[0115] The heat exchange main body 31 formed by the shell 311 and the plurality of partition plates 312 can form a "harmonica tube" structure, which is simple in structure and easy to manufacture. The shell 311 and the plurality of partition plates 312 can be integrally formed or separately arranged, which is not specifically limited here.

[0116] In the above technical solution, by arranging the heat exchange main body 31 to include the shell 311 and the partition plate 312, the heat exchange main body 31 as a whole can form a shell structure with a relatively small thickness, thereby having a relatively high heat exchange effect while having a relatively small volume, and saving space inside the box body 10. The partition plate 312 can also form an inclined rib inside the shell 311, which can improve the overall strength of the heat exchange main body 31, reduce the risk of large deformation of the shell 311, improve the reliability of the heat exchange main body 31, and further improve the reliability of the battery device 100.

[0117] In some embodiments of the present application, the shell 311 and the partition plate 312 are integrally formed. In this technical solution, the shell 311 and the partition plate 312 are integrally formed, which can reduce the number of parts and the assembly steps, thereby improving the production efficiency. The above solution can also improve the overall strength and rigidity of the heat exchange main body 31, reduce the risk of large deformation or damage of the heat exchange main body 31, improve the use reliability of the heat exchange main body 31, and further improve the reliability of the heat exchange assembly 30, thereby improving the reliability of the battery device 100.

[0118] In some embodiments of the present application, with reference to Figure 12 The shell wall at both ends of the shell 311 in the third direction Z is arranged as an arc-shaped wall 311a. In this technical solution, the arc-shaped wall 311a can reduce the stress concentration problem at both ends of the shell 311 in the third direction Z, thereby improving the reliability of the shell 311.

[0119] In some embodiments of the present application, with reference to Figure 11 On the cross-sectional surface perpendicular to the first direction X, the cross-sectional shape of the heat exchange flow channel 301 is the same as the cross-sectional shape of the plugging piece 321.

[0120] In the technical solution, the cross-sectional shape of the heat exchange flow channel 301 and the blocking piece 321 is the same, which can make the inner wall of the blocking piece 321 and the heat exchange flow channel 301 well fit, facilitate the sealing of the blocking piece 321 in the heat exchange flow channel 301, reduce the risk of gaps, and also make the blocking piece 321 uniformly bear pressure in all directions in the heat exchange flow channel 301, which is also conducive to maintaining the sealing state between the blocking piece 321 and the inner wall of the heat exchange flow channel 301. Because the cross-sectional shape of the heat exchange flow channel 301 and the blocking piece 321 is the same, the blocking piece 321 can also support inside the heat exchange flow channel 301, reduce the risk of large deformation of the heat exchange main body 31 due to stress, facilitate the reduction of the risk of the flow cross-section of the heat exchange flow channel 301, and improve the heat exchange reliability of the heat exchange main body 31.

[0121] In some embodiments of the present application, referring to Figure 11 and Figure 12 , the accommodation grooves 321b are multiple and are long strip grooves, the multiple accommodation grooves 321b are arranged side by side and spaced apart, and the extension direction of the accommodation grooves 321b is parallel to the partition plate 312, and the accommodation grooves 321b extend through the blocking piece 321 along the extension direction.

[0122] In the technical solution, by increasing the number of accommodation grooves 321b, the volume for storing overflow material can be increased, more overflow material can be received, the risk of overflow material can be reduced, overflow material can be collected from multiple positions, the range of overflow material collection can be expanded, and the risk of overflow material spreading to the surface of the heat exchange main body 31 and the flow collecting piece 322 can be reduced. With the above scheme, after the overflow material enters the accommodation grooves 321b, it can reach the edge position of the heat exchange flow channel 301 located at both ends of the partition plate 312 along the extension direction, and the overflow material can play a sealing role between the blocking piece 321 and the edge position, reducing the risk of gaps between the blocking piece 321 and the heat exchange flow channel 301, reducing the risk of the blocking piece 321 not being tightly blocked in the heat exchange flow channel 301, and enabling the heat exchange medium to flow in the heat exchange flow channel 301 of the heat exchange main body 31 as expected, thereby improving the reliability of the heat exchange assembly 30.

[0123] In some embodiments of the present application, the adapter 323 is injection molded on the heat exchange main body 31.

[0124] It can be understood that the adapter 323 can be manufactured by injection molding on the heat exchange main body 31, and the injection molding referred to herein can be but is not limited to overmolding and the like. For example, a core rod can be inserted in advance in the heat exchange flow channel 301 of the heat exchange main body 31 that does not need to be blocked, and then a mold required for injection molding of the adapter 323 is arranged at both ends of the first direction X of the heat exchange main body 31, the adapter 323 can be obtained by injecting injection liquid into the mold and cooling, and the adapter 323 formed in this way is more closely and firmly connected with the heat exchange main body 31 and is not easy to separate.

[0125] The adapter 323 can be made of plastic, and the current collector 322 can also be made of plastic. After the adapter 323 is formed, the adapter 323 can be fixed to the current collector 322 by welding through plastic hot melting.

[0126] The adapter 323 can also be partially made of plastic and partially made of metal, and the current collector 322 is made of metal. For example, the metal part of the adapter 323 can be pre-placed in a mold, and the plastic part of the adapter 323 can be injection molded. After the adapter 323 is formed, the metal part can be connected to the current collector 322 by welding.

[0127] In the above technical solution, the adapter 323 is injection molded on the heat exchange main body 31, the forming speed of the adapter 323 is relatively fast, and the adapter 323 is easy to mass-produce automatically, which can improve the production efficiency. Using this method can also make the adapter 323 have high dimensional accuracy and high surface quality, which can improve the forming quality of the adapter 323, improve the connection reliability between the heat exchange main body 31, the adapter 323 and the current collector 322, and further improve the reliability of the battery device 100.

[0128] In some embodiments of the present application, the heat exchange main body 31 is a metal or non-metal material; and / or, the current collector 322 is a metal or non-metal material.

[0129] It can be understood that the heat exchange main body 31 can be a metal material or a non-metal material; and the current collector 322 can be a metal material or a non-metal material. The metal material can include but is not limited to copper, copper alloy, aluminum alloy, etc., and the non-metal material can include but is not limited to plastic, ceramic, etc. The heat exchange main body 31 and the current collector 322 can be made of the same material or different materials.

[0130] Especially when the heat exchange main body 31 and the current collector 322 are made of different materials, for example, the heat exchange main body 31 is made of metal and the current collector 322 is made of non-metal; or the heat exchange main body 31 is made of non-metal and the current collector 322 is made of metal. By injection molding the adapter 323 on the heat exchange main body 31 and the current collector 322, it is beneficial to the connection between the heat exchange main body 31 and the current collector 322 made of different materials, which can reduce the installation difficulty of the heat exchange main body 31 and the current collector 322, and improve the connection reliability between the heat exchange main body 31 and the current collector 322.

[0131] In the technical solution, the heat exchange main body 31 is a metal material piece, which can have better heat conductivity, and is conducive to improving the heat exchange efficiency. The heat exchange main body 31 can also be a non-metal material piece, which can reduce the cost while meeting the heat conductivity. The current collecting piece 322 is a metal material piece, which can have higher rigidity and strength, and can reduce the risk of damage. The current collecting piece 322 is a non-metal material piece, which can reduce the cost while meeting the rigidity and strength. By setting the heat exchange main body 31 and the current collecting piece 322 to the above materials, more choices can be provided, and higher flexibility can be achieved.

[0132] With reference to Figure 1 , the application provides a power utilization device 1000, which comprises the battery device 100 according to any one of the preceding embodiments.

[0133] In the above technical solution, the battery device 100 has high reliability, and the use of the battery device 100 to store or provide electric energy can improve the power utilization reliability, and further improve the use reliability of the power utilization device 1000.

[0134] With reference to Figures 3 to 5 , Figure 7 and Figure 8 , the application provides a battery device 100, which comprises a box body 10, a battery monomer assembly 20, and a heat exchange assembly 30.

[0135] The battery monomer assembly 20 is accommodated in the box body 10.

[0136] The heat exchange assembly 30 is accommodated in the box body 10 to exchange heat with the battery monomer assembly 20, and the heat exchange assembly 30 comprises a heat exchange main body 31 and a current collecting structure 32.

[0137] The heat exchange main body 31 is a harmonica tube cold plate, and comprises a plurality of heat exchange flow channels 301 extending along a first direction X. A plurality of inclined ribs are arranged inside the harmonica tube cold plate, and the heat exchange flow channels 301 are formed between any two adjacent inclined ribs and between the inclined ribs and the inner wall of the harmonica tube cold plate.

[0138] The current collecting structure 32 is arranged at both ends of the heat exchange main body 31 in the first direction X, and the current collecting structure 32 comprises a blocking piece 321, a current collecting piece 322, and an adapter piece 323.

[0139] The blocking piece 321 is a plurality of pieces and blocks at least one heat exchange flow channel 301. The current collecting piece 322 is provided with a current collecting cavity 3221, and the current collecting piece 322 is sealingly connected with the heat exchange main body 31 through the adapter piece 323, so that the current collecting cavity 3221 and the heat exchange flow channel 301 are connected. The current collecting piece 322 is provided with a communication port 322a communicating with the current collecting cavity 3221, and the communication port 322a can be used for the heat exchange medium to enter or exit, so that the heat exchange medium can flow between the current collecting cavity 3221 and the heat exchange flow channel 301.

[0140] The adapter 323 is injection molded on the heat exchange main body 31 and is welded to the current collector 322.

[0141] The blocking member 321 has a side surface 321a close to the current collector 322, and the side surface 321a is provided with a plurality of accommodation grooves 321b arranged side by side and parallel to the inclined ribs inside the harmonica cold plate. The accommodation grooves 321b are configured to accommodate the flash for forming the adapter 323. The blocking member 321 is in interference fit with the inner wall of the heat exchange runner 301 along the second direction Y, and a gap 324 is formed between the blocking member 321 and the inner wall of the heat exchange runner 301 along the third direction Z. The gap 324 is configured to accommodate the flash for forming the adapter 323. The blocking member 321 also has a circumferential surface 321c arranged around the first direction X, and the circumferential surface 321c is provided with a recess 321d in an annular structure. The recess 321d is in communication with the gap 324, and the recess 321d is configured to accommodate the flash for forming the adapter 323 to form a seal on the circumferential side of the blocking member 321.

[0142] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0143] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, all the embodiments and optional embodiments of the present application can be combined to form new technical solutions without special description. If there is no special description, all the technical features and optional technical features of the present application can be combined to form new technical solutions. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized by, The application relates to a battery pack, comprising: a box body; a battery cell assembly accommodated in the box body; a heat exchange assembly accommodated in the box body and used for heat exchange with the battery cell assembly, the heat exchange assembly comprising: a heat exchange main body comprising a plurality of heat exchange flow channels extending along a first direction; a flow collecting structure arranged at both ends of the heat exchange main body along the first direction, the flow collecting structure comprising a blocking piece, a flow collecting piece and an adapter piece, the blocking piece being blocked in at least one of the heat exchange flow channels, the flow collecting piece being provided with a flow collecting cavity, the flow collecting piece being sealed and connected with the heat exchange main body through the adapter piece so that the flow collecting cavity and the heat exchange flow channels are communicated, the flow collecting piece being provided with a communication port communicating with the flow collecting cavity, the communication port being used for feeding and discharging heat exchange medium so that the heat exchange medium can flow between the flow collecting cavity and the heat exchange flow channels; wherein the adapter piece is formed on the heat exchange main body, the blocking piece has a side surface close to the flow collecting piece, the side surface is provided with a receiving groove configured to accommodate overflow material forming the adapter piece.

2. The battery device of claim 1, wherein The receiving groove is a plurality of long strip-shaped grooves, and the plurality of receiving grooves are arranged side by side and spaced apart on the side surface.

3. The battery device according to claim 1 or 2, characterized by The blocking piece abuts against the inner wall of the heat exchange flow channel along a second direction, and a gap is formed between the blocking piece and the inner wall of the heat exchange flow channel along a third direction, the gap being configured to accommodate overflow material forming the adapter piece, the third direction, the second direction and the first direction being perpendicular to each other.

4. The battery device of claim 3, wherein The size of the heat exchange main body in the second direction is smaller than the size of the heat exchange main body in the third direction.

5. The battery device of claim 3, wherein The blocking piece has a circumferential surface arranged around the first direction, the circumferential surface is provided with a groove, and the groove is communicated with the gap.

6. The battery device of claim 5, wherein The groove is an annular structure arranged around the first direction.

7. The battery device of claim 5, wherein The receiving groove extends towards the side close to the gap and forms an opening on the circumferential surface, and the opening is communicated with the gap.

8. The battery device of claim 5, wherein, In the first direction, the size of the blocking piece is L1, and the distance between the groove and the side surface is L2, wherein L2 < 1 / 2 L1.

9. The battery device of claim 1, wherein, The heat exchange main body comprises a shell and a partition plate, both ends of the shell along the first direction are open, the size of the shell in the second direction is smaller than the size of the shell in the third direction, the third direction, the second direction and the first direction are perpendicular to each other, the partition plate is a plurality of partition plates arranged in the shell, the partition plate is arranged obliquely relative to the second direction, the partition plate and the shell wall and any two adjacent partition plates form the heat exchange flow channel.

10. The battery device of claim 9, wherein, The shell and the partition plate are integrally formed.

11. The battery device according to claim 9 or 10, characterized by On a section plane perpendicular to the first direction, the cross-sectional shape of the heat exchange flow channel is the same as the cross-sectional shape of the blocking piece.

12. The battery device of claim 9, wherein, The receiving groove is a plurality of long strip-shaped grooves, and the plurality of receiving grooves are arranged side by side and spaced apart, the extension direction of the receiving groove is parallel to the partition plate, and the receiving groove penetrates the blocking piece along the extension direction.

13. The battery device of claim 1, wherein The adapter piece is injection molded on the heat exchange main body.

14. The battery device of claim 1, wherein, The heat exchange main body is a metal material piece or a non-metal material piece; and / or the current collecting piece is a metal material piece or a non-metal material piece.

15. An electrical device, comprising: The battery device as claimed in any one of claims 1 to 14 is used for storing or providing electric energy.

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