Battery apparatus and electrical apparatus

Abstract

A battery apparatus (100) and an electrical apparatus (1000). The battery apparatus comprises: a box body (10); a battery cell assembly (20) accommodated within the box body; and a heat exchange assembly (30) accommodated within the box body and in heat exchange with the battery cell assembly. The heat exchange assembly comprises: a heat exchange main body (31), comprising a plurality of heat exchange flow channels (301); and a flow collecting structure disposed at both ends of the heat exchange main body in a first direction, each flow collecting structure comprising a blocking member (321), an adapter (323), and a flow collecting member (322). The blocking member comprises a connecting portion (3211) and at least two blocking portions (3212). The at least two blocking portions are connected by means of the connecting portion, and the at least two blocking portions are configured to be able to block at least two of the heat exchange flow channels. The adapter is formed on the heat exchange main body. A flow collecting chamber (3221) is formed in the interior of the flow collecting member. The flow collecting member is sealingly fitted and connected to the heat exchange main body by means of the adapter, and the flow collecting member is provided with a communication port (322a) in communication with the flow collecting chamber.

Description

Battery devices and electrical appliances

[0001] Cross-references to related applications

[0002] This application is based on and claims priority to Chinese patent applications No. 202411793200.7, filed on December 6, 2024; 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. Summary of the Invention

[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 and exchanging heat 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 connecting member, and a flow collector. The sealing member includes a connecting portion and at least two sealing portions connected through the connecting portion, and the at least two sealing portions can seal within at least two heat exchange channels. The connecting member is formed on the heat exchange body. A flow collection cavity is formed inside the flow collector. The flow collector is sealed and connected to the heat exchange body through 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 entry and exit of heat exchange medium, so that the heat exchange medium can flow between the flow collection cavity and the heat exchange channels.

[0007] In the battery device with the above structure, by configuring the heat exchange assembly to include a heat exchange body and a current collection structure, and the current collection structure including a sealing component, a current collector, and a connecting component, when the heat exchange body is connected to the current collection structure, the connecting component is formed on the heat exchange body and then connected to the current collector. This allows the current collector to be not directly connected to the heat exchange body. The connecting component can easily adapt to the size and shape of the heat exchange body during the forming process, and can pre-match the size and shape of the current collector. This reduces the installation difficulty between the heat exchange body, the current collector, and the connecting component, improves connection reliability, reduces the risk of leakage, and improves the reliability of the battery device. By configuring the sealing component to include a connecting part and at least two sealing parts, with the at least two sealing parts connected by the connecting part, the connecting part can limit the sealing parts, reducing the risk of displacement or deformation of the sealing parts during the molding process of the adapter. This is beneficial to improving the sealing effect of the sealing parts on the heat exchange channel at their location, thus meeting the heat exchange design requirements of the heat exchange assembly. It also helps to improve the molding quality of the adapter, the connection strength and reliability between the adapter and the heat exchange body, the reliability of the heat exchange assembly, and the reliability of the battery device.

[0008] In some embodiments of this application, the blocking portion has an outer surface near the collector, and on a reference plane parallel to the outer surface, the area of ​​the connection portion projected onto the reference plane is smaller than the area of ​​the outer surface.

[0009] In the above technical solution, the structure allows the dimension of the portion corresponding to the sealing portion to be smaller than the dimension of the sealing portion. During the forming process of the adapter in the heat exchange body, the material forming the adapter has a larger contact surface with the outer side, which can improve the bonding strength and connection reliability of the sealing portion, the adapter, and the heat exchange body. This enhances the sealing effect of the sealing portion on the heat exchange channel, improves the reliability of the heat exchange assembly, and thus improves the reliability of the battery device. Furthermore, this structure reduces material usage and weight of the sealing portion, even when at least two sealing portions are integrated through the connecting portion, which is beneficial for increasing the energy density of the battery device.

[0010] In some embodiments of this application, the dimensions of the heat exchange body in the first direction and the third direction are greater than the dimensions in the second direction, and multiple heat exchange channels are spaced apart along the third direction. In the second direction, the dimensions of the connecting part are smaller than the dimensions of the sealing part, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0011] In the above technical solution, the heat exchanger body can be formed into a thin plate-like structure, which makes it easier to adhere to the surface of the battery cell assembly for heat exchange. This saves space inside the housing, provides more room for the battery cell assembly, increases the energy density of the battery device, and also provides more room for other electrical components. This facilitates the installation of internal components, reduces installation difficulty, and is beneficial for maintenance and repair. Each sealing part has an area not covered by the connecting part. During the molding of the adapter onto the heat exchanger body, each sealing part and the adapter can have a larger mating surface, and the sealing part as a whole and the adapter can also have a larger mating surface, which can improve connection strength and reliability. Moreover, more of the edge position of each sealing part that mates with the heat exchange channel is exposed. During the molding of the adapter, more edge positions of the sealing part can be covered, enhancing the sealing effect of the sealing part on the heat exchange channel, thereby improving the reliability of the heat exchange assembly and the battery device.

[0012] In some embodiments of this application, the connecting part and the sealing part are detachably connected. Using the above solution, the connecting part and the sealing part can be manufactured separately. After manufacturing the connecting part and the sealing part separately, they are then assembled. This reduces the manufacturing difficulty of the sealing component, improves product yield, and allows for replacement of only the damaged part if either the connecting part or the sealing part is damaged, thus reducing usage costs.

[0013] In some embodiments of this application, one of the connecting part and the sealing part is provided with a latching protrusion, and the other is provided with a latching groove, which are engaged and connected. In this technical solution, the connecting part and the sealing part can be engaged and connected through the latching groove and the latching protrusion. This disassembly and connection method has a simple structure, is easy to install or disassemble, and has a reliable connection, which can improve the connection reliability of the connecting part and the sealing part.

[0014] In some embodiments of this application, the locking protrusions or locking grooves are located at opposite ends of the connecting portion. In this technical solution, the opposite ends of the connecting portion can be connected to the sealing portion through the locking grooves and locking protrusions, thereby providing a fixing effect on opposite sides of the connecting portion and the sealing portion, resulting in a more stable and balanced fixing effect, and further improving the connection reliability of the connecting portion and the sealing portion.

[0015] In some embodiments of this application, the protruding portion is provided on the connecting portion, and the slot portion is provided on the sealing portion. In this technical solution, since the sealing portion seals inside the heat exchange channel, and considering that the adapter needs to wrap around the heat exchange body, the size of the sealing portion is larger than that of the connecting portion. Therefore, placing the slot portion on the sealing portion can facilitate the processing of the slot portion and reduce the manufacturing difficulty.

[0016] In some embodiments of this application, one of the connecting part and the sealing part is provided with a guide groove, and the other is provided with a guide post, with the guide post disposed within the guide groove. In this technical solution, the connecting part and the sealing part, through the guiding action of the guide groove and the guide post, can improve the positioning accuracy of the connecting part and the sealing part during connection, increase the success rate of engagement of the locking protrusion and the locking groove, and thus improve assembly efficiency.

[0017] In some embodiments of this application, the guide post is disposed on the connecting part, and the guide groove is disposed on the sealing part. In this technical solution, since the sealing part seals inside the heat exchange channel, and considering that the adapter needs to wrap around the heat exchange body, the size of the sealing part is larger than that of the connecting part. Therefore, placing the guide groove on the sealing part can facilitate the processing of the guide groove and reduce the manufacturing difficulty.

[0018] In some embodiments of this application, any two adjacent sealing portions can be detachably connected by a connecting portion.

[0019] In the above technical solution, when there are many sealing parts, multiple connecting parts can be used to connect them sequentially, making the connection method more flexible. Each sealing part and connecting part is easier to operate during assembly, reducing assembly difficulty. When a heat exchange channel corresponding to a sealing part fails, connecting two adjacent sealing parts through the connecting parts allows for more precise handling of the faulty part. Only the connecting and sealing parts at the faulty location need to be disassembled, without disassembling connecting and sealing parts at other locations. The operating range is relatively small, reducing maintenance difficulty and minimizing the risk of interfering with other normally operating sealing parts. It also helps save on maintenance and material costs. When it is necessary to adjust the heat exchange capacity of the heat exchange component, such as adjusting the number of heat exchange channels involved in heat exchange, the above solution makes it easier to start or shut down individual or partial heat exchange channels. Adjustments can be made flexibly by disassembling or installing connecting parts according to actual heat exchange requirements, with fewer restrictions during adjustment, which is beneficial for the flexible adjustment of heat exchange channels in the heat exchange body.

[0020] In some embodiments of this application, the connecting portion includes a first part and a second part, which are detachably connected. The first part is connected to one of two adjacent sealing portions, and the second part is connected to the other of two adjacent sealing portions.

[0021] In the above technical solution, by setting the connecting part into a two-part structure and setting it on two adjacent sealing parts, the two adjacent sealing parts can be detachably connected through the first part and the second part. The sealing part does not need to be set with a detachable fit structure, which can reduce the structural damage to the sealing part, ensure the reliability of the sealing part itself, thereby enhancing the sealing effect of the sealing part on the heat exchange channel, simplifying the structure of the sealing part, and reducing manufacturing costs.

[0022] In some embodiments of this application, one of two adjacent sealing portions is integrally formed with the first portion, and the other is integrally formed with the second portion. In this technical solution, by integrally forming the first portion with the corresponding sealing portion, the number of parts can be reduced, assembly steps can be reduced, and the assembly efficiency of the heat exchange assembly can be improved. Furthermore, by making the first portion and the corresponding sealing portion an integral part, the overall structural strength and reliability of the sealing component can be improved. Similarly, integrally forming the second portion with the corresponding sealing portion also reduces the number of parts, reduces assembly steps, improves the assembly efficiency of the heat exchange assembly, and by making the second portion and the corresponding sealing portion an integral part, improves the overall structural strength and reliability of the sealing component.

[0023] In some embodiments of this application, the first part is provided with a first insertion part extending out of the sealing part, and the second part is provided with a first slot. The first slot and the first insertion part are inserted and engaged, and the first insertion part and the first slot extend along the interval direction of at least two sealing parts. In the above technical solution, the first part can be inserted and engaged with the first slot of the second part, thereby making two adjacent sealing parts detachably connected. This detachable method is simple to operate, relatively convenient to manufacture, can improve disassembly and assembly efficiency, and reduce costs.

[0024] In some embodiments of this application, the connecting portion is connected to one of two adjacent blocking portions and includes an extension portion and a second insertion portion. The extension portion connects to the blocking portion and extends towards the other of the two adjacent blocking portions. The second insertion portion is disposed on the extension portion, and the other of the two adjacent blocking portions is provided with a second slot. The second slot and the second insertion portion are inserted into each other. In this technical solution, the two adjacent blocking portions can be connected together by the insertion of the second insertion portion and the second slot. This detachable method is simple to operate, and because the second slot is disposed on the blocking portion, the connection between the connecting portion and the blocking portion is more secure and reliable.

[0025] In some embodiments of this application, the second connector is located at the end of the extension that is away from the current collector. In this technical solution, the second connector is located at the end of the extension, which makes the overall structure of the connection more compact, reduces the size of the connection, and reduces the weight, thereby improving the energy density of the battery device.

[0026] In some embodiments of this application, the connecting part and the corresponding sealing part are integrally formed. In this technical solution, the integral forming of the connecting part and the corresponding sealing part can reduce the number of parts, reduce assembly steps, improve the assembly efficiency of the heat exchange component, and also make the connecting part and the corresponding sealing part form an integral part, thereby improving the overall structural strength and the reliability of the sealing part.

[0027] In some embodiments of this application, the connecting portion and at least two sealing elements are integrally formed.

[0028] In the above technical solution, the above structure can reduce the number of parts, reduce assembly steps, improve the assembly efficiency of heat exchange components, and also make the connecting part and at least two sealing parts form an integral part, improve the overall structural strength, and improve the reliability of the sealing parts.

[0029] In some embodiments of this application, the adapter is integrally injection molded onto the heat exchange body.

[0030] In the above technical solution, the adapter is injection molded onto the heat exchanger body. This method allows for rapid molding, facilitating large-scale automated production and improving production efficiency. Furthermore, it ensures the adapter has high dimensional accuracy and surface quality, enhancing its molding quality and improving the connection reliability between the heat exchanger body, the adapter, and the current collector, thereby increasing the reliability of the battery device.

[0031] In some embodiments of this application, the heat exchanger body is made of a metallic or non-metallic material; and / or, the current collector is made of a metallic or non-metallic material. In this technical solution, a metallic heat exchanger body offers better thermal conductivity, which is beneficial for improving heat exchange efficiency. Alternatively, a non-metallic heat exchanger body can reduce costs while still meeting thermal conductivity requirements. A metallic current collector provides higher rigidity and strength, reducing the risk of damage. A non-metallic current collector reduces costs while still meeting rigidity and strength requirements. By using the aforementioned materials for the heat exchanger body and current collector, more options and greater flexibility are available.

[0032] Secondly, embodiments of this application provide an electrical device, including a battery device as described above, the battery device being used to store or provide electrical energy.

[0033] In the above technical solution, since the battery device has high reliability, using the battery device to store or provide electrical energy can improve the reliability of power supply, thereby improving the reliability of the power supply device. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 is a structural schematic diagram of a vehicle provided in some embodiments of this application;

[0036] Figure 2 is an exploded view of the structure of a battery device provided in some embodiments of this application;

[0037] Figure 3 is a partial structural schematic diagram of a battery device provided in some embodiments of this application;

[0038] Figure 4 is a three-dimensional structural schematic diagram of the heat exchange component provided in some embodiments of this application;

[0039] Figure 5 is a partial structural schematic diagram of a heat exchange component provided in some embodiments of this application;

[0040] Figure 6 is a partial structural schematic diagram of the heat exchanger body provided in some embodiments of this application;

[0041] Figure 7 is a partial internal structure diagram of a heat exchange component provided in some embodiments of this application;

[0042] Figure 8 is a three-dimensional structural schematic diagram of the sealing component provided in some embodiments of this application;

[0043] Figure 9 is an exploded view of the sealing component provided in some embodiments of this application;

[0044] Figure 10 is a three-dimensional structural schematic diagram of a sealing component provided in another embodiment of this application;

[0045] Figure 11 is an exploded view of a sealing component provided in another embodiment of this application;

[0046] Figure 12 is a three-dimensional structural schematic diagram of the sealing component provided in another embodiment of this application;

[0047] Figure 13 is an exploded view of a sealing component provided in another embodiment of this application;

[0048] Figure 14 is a magnified view of part I in Figure 7;

[0049] Figure 15 is a three-dimensional structural schematic diagram of the adapter provided in some embodiments of this application;

[0050] Figure 16 is a three-dimensional structural schematic diagram of the current collector provided in some embodiments of this application;

[0051] Figure 17 is a side view of a heat exchanger body provided in some embodiments of this application.

[0052] Icons: 1000, Electrical device; 100, Battery device; 10, Housing; 11, First housing body; 12, Second housing body; 20, Battery cell assembly; 21, Battery cell; 30, Heat exchange assembly; 31, Heat exchange main body; 301, Heat exchange channel; 302, Channel wall; 311, Shell; 311a, Arc-shaped wall; 312, Partition; 32, Current collection structure; 321, Sealing component; 3211, Connecting part; 3211a, Clearance groove; 3212, Sealing part; 3212a, Outer side; 3212b, Second slot; 3212c, Peripheral side; 3205, First part; 32051, First insertion part; 3207, Extension part; 3208, Second insertion part; 3206, Second part; 3206a, First slot; 322, manifold; 3221, manifold cavity; 322a, connecting port; 322b, settling tank; 323, adapter; 3231, weldable part; 3201, locking protrusion; 3202, locking groove; 3203, guide groove; 3204, guide post; 200, controller; 300, motor; X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0054] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0055] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0056] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0057] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0058] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0059] In this application, "multiple" means two or more (including two).

[0060] In this application, the battery cell may include lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc., and the embodiments of this application are not limited to these. The battery cell may be cylindrical, flat, cuboid, or other shapes, and the embodiments of this application are not limited to these. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and the embodiments of this application are not limited to these.

[0061] The battery apparatus mentioned in the embodiments of this application can refer to an assembly of one or more battery cells for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar. In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0062] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0063] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing. As an example, the individual battery cell assembly may be a battery module, which can be housed within the housing by securing the battery module to the housing. Alternatively, the individual battery cell assembly may be housed within the housing by directly securing multiple individual battery cells to the housing. The housing prevents liquids or other foreign matter from affecting the charging or discharging of the individual battery cells.

[0064] A single battery cell includes a casing, electrode assembly, and electrolyte. The casing houses the electrode assembly and electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode plates. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, while the uncoated positive current collector protrudes beyond the coated one, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the negative current collector without the negative active material layer protrudes from the one with the negative active material layer. The negative current collector without the negative active material layer serves as the negative electrode tab. The material of the negative current collector can be copper, and the negative active material can be carbon or silicon, etc. To ensure that a large current can be passed without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together.

[0065] The separator can be made of PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0066] 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.

[0067] In typical battery packs, a cold plate is usually installed inside the casing to exchange heat with the individual battery cells. The cold plate is connected to pipes for the inlet and outlet of the heat exchange medium via current collectors. The cold plate and current collectors are two independent components, both made of metal and welded together. However, controlling the dimensions and surface flatness of the cold plate is difficult, leading to poor fit between the cold plate and the current collector. This can affect the welding quality, increasing the risk of leakage between the cold plate and the current collector, impacting the heat exchange reliability of the cold plate. Furthermore, leaked heat exchange medium entering the casing can easily cause short circuits and other electrical safety hazards, thus affecting the overall reliability of the battery pack.

[0068] Based on the above considerations, in order to solve the problem that the reliability of the battery device is affected by the reliability issues of the heat exchange components during installation. The applicant has designed a battery device, comprising: a housing, a battery cell assembly, and a heat exchange assembly. The battery cell assembly is housed within the housing. The heat exchange assembly is housed within the housing and exchanges heat with the battery cell assembly. The heat exchange assembly includes a heat exchange body and a flow collection structure. The heat exchange body includes multiple heat exchange channels extending along a first direction. The flow collection structure is located at both ends of the heat exchange body in the first direction. The flow collection structure includes a sealing component, a connecting component, and a flow collector. The sealing component includes a connecting portion and at least two sealing portions. The at least two sealing portions are connected through the connecting portion and can seal within at least two heat exchange channels. The connecting component is formed on the heat exchange body. A flow collection cavity is formed inside the flow collector. The flow collector is sealed and connected to the heat exchange body through the connecting component to allow the flow collection cavity and the heat exchange channels to communicate. The flow collector has a connecting port that connects to the flow collection cavity. The connecting port can be used for the entry and exit of heat exchange medium to allow the heat exchange medium to flow between the flow collection cavity and the heat exchange channels.

[0069] In the battery device with the above structure, by configuring the heat exchange assembly to include a heat exchange body and a current collection structure, and the current collection structure including a sealing component, a current collector, and a connecting component, when the heat exchange body is connected to the current collection structure, the connecting component is formed on the heat exchange body and then connected to the current collector. This allows the current collector to be not directly connected to the heat exchange body. The connecting component can easily adapt to the size and shape of the heat exchange body during the forming process, and can pre-match the size and shape of the current collector. This reduces the installation difficulty between the heat exchange body, the current collector, and the connecting component, improves connection reliability, reduces the risk of leakage, and improves the reliability of the battery device. By configuring the sealing component to include a connecting part and at least two sealing parts, with the at least two sealing parts connected by the connecting part, the connecting part can limit the sealing parts, reducing the risk of displacement or deformation of the sealing parts during the molding process of the adapter. This is beneficial to improving the sealing effect of the sealing parts on the heat exchange channel at their location, thus meeting the heat exchange design requirements of the heat exchange assembly. It also helps to improve the molding quality of the adapter, the connection strength and reliability between the adapter and the heat exchange body, the reliability of the heat exchange assembly, and the reliability of the battery device.

[0070] The battery device disclosed in this application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system incorporating the battery device disclosed in this application can be used to construct such an electrical device.

[0071] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0072] For ease of explanation, the following embodiments use a vehicle as an example of an electrical device 1000 according to one embodiment of this application. Please refer to Figure 1, which is a structural schematic diagram of a vehicle provided in some embodiments of this application for the electrical device 1000. The vehicle can be a gasoline vehicle, a natural gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is provided inside the vehicle, and the battery device 100 can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to power the vehicle; for example, the battery device 100 can serve as the vehicle's operating power source. The vehicle may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle during starting, navigation, and driving.

[0073] 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.

[0074] Please refer to Figure 2, which 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 cover each other, and the first housing body 11 and the second housing body 12 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; the first housing body 11 and the second housing body 12 may also be hollow structures both 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.

[0075] 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.

[0076] Please refer to Figure 2, which is a partial structural schematic diagram 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 direction of the housing 10. Each row of battery cells 21 includes multiple battery cells 21 arranged along the width direction of the housing 10; or, the multiple rows of battery cells 21 are arranged along the width direction of the housing 10, and each row of battery cells 21 includes multiple battery cells 21 arranged along the length direction of the housing 10.

[0077] Each battery cell 21 can be a secondary battery or a primary battery. A secondary battery refers to a battery cell 21 that can be recharged after discharge to activate the active materials and continue to be used. It can also be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this embodiment is not limited in this respect. The battery cell 21 can be cylindrical, flat, cuboid, or other shapes. For example, in Figure 2, the battery cell 21 is cuboid.

[0078] According to some embodiments of this application, referring to Figures 3 to 7, this application provides a battery device 100, including: a housing 10, a battery cell assembly 20, and a heat exchange assembly 30. The battery cell assembly 20 is housed within the housing 10. The heat exchange assembly 30 is housed within the housing 10 and exchanges heat with the battery cell assembly 20. The heat exchange assembly 30 includes a heat exchange body 31 and a current collection structure 32. The heat exchange body 31 includes a plurality of heat exchange channels 301 extending along a first direction X. The current collection structure 32 is disposed at both ends of the heat exchange body 31 located in the first direction X. The current collection structure 32 includes a sealing member 321, a connecting member 323, and a current collector 322. The sealing member 321 includes a connecting portion 3211 and at least two sealing portions 3212. The at least two sealing portions 3212 are connected through the connecting portion 3211, and... At least two sealing parts 3212 can be sealed in at least two heat exchange channels 301. The adapter 323 is formed on the heat exchange body 31. The inside of the collector 322 is formed with a collector cavity 3221. The collector 322 is sealed and connected to the heat exchange body 31 through the adapter 323 so that the collector cavity 3221 and the heat exchange channel 301 are connected. The collector 322 is provided with a connecting port 322a that connects to the collector cavity 3221. The connecting port 322a can be used for the entry and exit of heat exchange medium so that the heat exchange medium can flow between the collector cavity 3221 and the heat exchange channel 301.

[0079] The enclosure 10 refers to the external structure of the battery device 100, providing physical protection for components such as the battery cell assembly 20 and heat exchange assembly 30 inside the battery device 100. The material of the enclosure 10 can include, but is not limited to, metal or composite materials. Metal materials can include, but are not limited to, aluminum alloy or steel, while composite materials can include, but are not limited to, carbon fiber reinforced composite materials, glass fiber reinforced composite materials, etc. The shape of the enclosure 10 can also include, but is not limited to, a cuboid, a cube, or a cylinder.

[0080] A battery cell assembly 20 can refer to an assembly comprising one or more battery cells 21. When there are multiple battery cells 21, the multiple battery cells 21 can be connected in series, in parallel, or in a series-parallel configuration, etc.

[0081] The heat exchange assembly 30 can refer to a structure or component used to regulate the temperature of the battery cell assembly 20 and ensure its normal operation. There can be one or more heat exchange assemblies 30, which can be disposed on the surface of one or two outermost battery cells 21 of the battery cell assembly 20, or between one or more groups of any two adjacent battery cells 21. For example, referring to FIG3, the battery cell assembly 20 can include multiple rows of battery cells 21 arranged along the second direction Y, with multiple rows of battery cells 21 arranged along the first direction X. Heat exchange assemblies 30 are provided between any two adjacent rows of battery cells 21 and on the outer sides of the two rows of battery cells 21 at both ends of the second direction Y. The first direction X, the second direction Y, and the third direction Z mentioned below can refer to one of the length, width, and height directions of the heat exchange body 31. For example, the first direction X can refer to the length direction of the heat exchange body 31.

[0082] The heat exchanger body 31 can refer to a pipe-like component or a cavity structure capable of carrying a heat exchange medium. The heat exchange flow channel 301 can refer to a flow channel formed inside the heat exchanger body 31 for carrying the heat exchange medium, and can extend through the heat exchanger body 31 along the first direction X. The heat exchanger body 31 can be flat; for example, it can be a flat plate component or a structure composed of multiple heat exchange tubes connected side by side. The material of the heat exchanger body 31 can include, but is not limited to, metal materials, composite materials, or ceramic materials. Metal materials can include, but are not limited to, aluminum alloys, copper alloys, etc. Composite materials can include, but are not limited to, carbon fiber reinforced composite materials or graphite-metal composite materials, etc. Ceramic materials can include, but are not limited to, aluminum nitride ceramics or beryllium oxide ceramics, etc. The heat exchange medium mentioned in this application can include, but is not limited to, water, ethylene glycol aqueous solution, mineral oil, silicone oil, etc.

[0083] The flow collection structure 32 is provided at both ends of the heat exchange body 31 in the first direction X. It can refer to the flow collection structure 32 at both ends of the first direction X. One can be used to introduce the heat exchange medium and transport the heat exchange medium to the heat exchange channel 301 of the heat exchange body 31. The other can output the heat exchange medium after heat exchange from the heat exchange channel 301 to the external circulation pipeline.

[0084] The sealing component 321 can refer to a component capable of sealing the heat exchange channel 301. The sealing component 321 consists of at least two parts: a connecting part 3211 and a sealing part 3212.

[0085] For ease of understanding, the sealing part 3212 can refer to a plug or blockage, partially or completely embedded in the heat exchange channel 301 to seal it. The number of sealing parts 3212 can be two, three, four, etc., and a certain number of sealing parts 3212 can be selected as needed to seal a corresponding number of heat exchange channels 301, thereby adjusting the heat exchange capacity of the heat exchange component 30 to meet different usage requirements. For example, if the number of blocked heat exchange channels 301 in the heat exchange body 31 is more, the amount of heat exchange medium flowing is less, and the overall heat exchange capacity of the heat exchange component 30 will be poorer; if the number of blocked heat exchange channels 301 in the heat exchange body 31 is less, the amount of heat exchange medium flowing is more, and the overall heat exchange capacity of the heat exchange component 30 will be higher. The material of the sealing part 3212 can be, but is not limited to, wood, rubber, or plastic.

[0086] The connecting part 3211 can refer to a connecting structure or component that connects at least two sealing parts 3212. By connecting the connecting part 3211 and at least two sealing parts 3212, the connecting part 3211 and at least two sealing parts 3212 can form a single unit, allowing at least two sealing parts 3212 to be installed simultaneously into the corresponding heat exchange channels 301. This facilitates the assembly of at least two sealing parts 3212 in one step, reducing assembly steps and improving assembly efficiency. After at least two sealing parts 3212 are assembled into the heat exchange channels 301, the connecting part 3211 also acts as a limiting element on the outside of the heat exchange channels 301, reducing the risk of displacement and deformation of the sealing parts 3212 within the heat exchange channels 301. This improves the installation reliability of the sealing parts 3212 within the heat exchange channels 301 and enhances the sealing reliability of the sealing parts 3212 in the heat exchange channels 301. It also facilitates the smooth and stable molding of the adapter 323 onto the heat exchange body 31.

[0087] The manifold 322 can refer to the main structure of the manifold structure 32, a component used to receive the heat exchange medium and collect the heat exchange medium together. For example, the manifold 322 can be a collector, and the manifold cavity 3221 refers to the cavity structure formed on the manifold 322. Optionally, the manifold cavity 3221 can be a cavity open to one side of the heat exchange body 31. The connecting port 322a can refer to the inlet and outlet for the heat exchange medium to enter and exit the manifold cavity 3221. The material of the manifold 322 can include, but is not limited to, metal, plastic, or composite materials. Metal materials can include, but are not limited to, aluminum alloy, copper alloy, etc. Plastic materials can include, but are not limited to, polyethylene or polypropylene, etc. Composite materials can include, but are not limited to, carbon fiber reinforced composite materials or graphite-metal composite materials, etc.

[0088] The adapter 323 can refer to a component used to connect the manifold 322 and the heat exchange body 31. The adapter 323 can be an annular structure arranged around the first direction X, with one end of the adapter 323 wrapped around the heat exchange body 31 and the other end wrapped around the manifold 322. The material of the adapter 323 can be, but is not limited to, metal or plastic. Metal materials can include, but are not limited to, aluminum alloy, copper alloy, etc., and plastic materials can include, but are not limited to, polyethylene or polypropylene, etc.

[0089] "The adapter 323 is formed on the heat exchange body 31" can be understood as the adapter 323 being formed on the surface of the heat exchange body 31, thereby enabling the adapter 323 and the heat exchange body 31 to be tightly integrated into a whole. The forming method of the adapter 323 on the heat exchange body 31 can include, but is not limited to, injection molding, 3D printing, casting, etc., without specific limitations.

[0090] Since the heat exchanger body 31 and the collector 322 are usually pre-manufactured components with fixed dimensions or shapes, direct connection between them would be difficult in terms of matching dimensions, shapes, and surface flatness, and could easily lead to poor fit, affecting connection quality. By molding the adapter 323 onto the heat exchanger body 31, the adapter 323 can be manufactured according to the existing dimensions and shape of the heat exchanger body 31. Manufacturing the adapter 323 is easier, and the molding die allows it to better adapt to the existing dimensions, shape, and surface flatness of the collector 322. This reduces the installation difficulty between the heat exchanger body 31 and the collector 322. Connecting the heat exchanger body 31 to the collector 322 via the adapter 323 also ensures high connection quality, improving the reliability of the connection between the heat exchanger body 31, the adapter 323, and the collector 322.

[0091] The connection method between the adapter 323 and the collector 322 can include, but is not limited to, welding, bolting, or riveting, etc., and no specific restrictions are imposed here.

[0092] During the molding of the adapter 323 onto the heat exchange body 31, the material forming the adapter 323 (e.g., injection molding liquid or casting liquid) acts on the sealing portion 3212. Since the connecting portion 3211 is located on the outside of the heat exchange body 31, the connecting portion 3211 can limit at least two sealing portions 3212, allowing the sealing portions 3212 to be stably positioned inside the heat exchange channel 301, preventing displacement or deformation. This facilitates the sealing portion 3212 sealing the heat exchange channel 301 and reduces the formation of the adapter 323. There is a risk of displacement of the sealing part 3212 during the molding process. If the sealing part 3212 is displaced, the material of the adapter 323 during the molding process will enter the space formed after the displacement of the sealing part 3212, resulting in insufficient material to form the adapter 323 and affecting the molding quality of the adapter 323. Therefore, the above solution is conducive to the smooth molding of the adapter 323 on the heat exchange body 31, improving the molding quality of the adapter 323, and improving the connection strength and reliability between the adapter 323 and the heat exchange body 31.

[0093] In the battery device 100 with the above-described structure, the heat exchange assembly 30 is configured to include a heat exchange body 31 and a current collection structure 32, and the current collection structure 32 includes a sealing member 321, a current collection member 322, and a connecting member 323. When the heat exchange body 31 is connected to the current collection structure 32, the connecting member 323 is formed on the heat exchange body 31 and then connected to the current collection member 322. This prevents the current collection member 322 from being directly connected to the heat exchange body 31. The connecting member 323 can easily adapt to the size and shape of the heat exchange body 31 during the forming process and can pre-match the size and shape of the current collection member 322. This reduces the installation difficulty between the heat exchange body 31, the current collection member 322, and the connecting member 323, improves connection reliability, reduces the risk of leakage, and improves the reliability of the battery device 100. By configuring the sealing member 321 to include a connecting part 3211 and at least two sealing parts 3212, with the at least two sealing parts 3212 connected by the connecting part 3211, the connecting part 3211 can limit the sealing parts 3212, reducing the risk of displacement or deformation of the sealing parts 3212 during the molding process of the adapter 323. This is beneficial to improving the sealing effect of the sealing parts 3212 on the heat exchange channel 301 at their location, thus meeting the heat exchange design requirements of the heat exchange assembly 30. It is also beneficial to improve the molding quality of the adapter 323, improve the connection strength and reliability between the adapter 323 and the heat exchange body 31, improve the reliability of the heat exchange assembly 30, and also improve the reliability of the battery device 100.

[0094] In some embodiments of this application, referring to Figures 8 to 13, the blocking portion 3212 has an outer surface 3212a close to the collector 322. On a reference plane parallel to the outer surface 3212a, the area of ​​the orthographic projection of the connecting portion 3211 on the reference plane is smaller than the area of ​​the outer surface 3212a.

[0095] The “reference plane” can refer to any plane that is constructed parallel to the outer surface 3212a.

[0096] The statement "the area of ​​the connecting portion 3211 projected onto the reference plane is smaller than the area of ​​the outer surface 3212a" can be understood as follows: in the second direction Y, the size of the connecting portion 3211 is smaller than the size of the outer surface 3212a; or, in the third direction Z, the size of the portion of the connecting portion 3211 corresponding to the outer surface 3212a is smaller than the size of the outer surface 3212a; or, in the second direction Y, the size of the connecting portion 3211 is smaller than the size of the outer surface 3212a, and in the third direction Z, the size of the portion of the connecting portion 3211 corresponding to the outer surface 3212a is smaller than the size of the outer surface 3212a. The second direction Y and the third direction Z can be referred to in Figures 8 to 13.

[0097] In the above technical solution, the structure allows the size of the portion of the connecting part 3211 corresponding to the sealing part 3212 to be smaller than the size of the sealing part 3212. During the forming of the adapter 323 in the heat exchange body 31, the material forming the adapter 323 has a larger contact surface with the outer surface 3212a. This improves the bonding strength and connection reliability of the sealing part 3212, the adapter 323, and the heat exchange body 31, enhances the sealing effect of the sealing part 3212 on the heat exchange channel 301, improves the reliability of the heat exchange assembly 30, and consequently improves the reliability of the battery device 100. Furthermore, this structure reduces material usage and lightens the weight of the sealing part 321, even when at least two sealing parts 3212 are integrated through the connecting part 3211, which is beneficial for increasing the energy density of the battery device 100.

[0098] In some embodiments of this application, referring to Figures 6 and 8, the dimensions of the heat exchange body 31 in the first direction X and the third direction Z are greater than the dimensions in the second direction Y. A plurality of heat exchange channels 301 are spaced apart along the third direction Z. In the second direction Y, the dimensions of the connecting portion 3211 are smaller than the dimensions of the blocking portion 3212. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0099] The heat exchange body 31 with the above structure can have a rectangular cross-section on a section plane perpendicular to the first direction X. For example, the cross-section of the heat exchange body 31 can be elongated (see Figure 6). With the above structure, the heat exchange body 31 can be a thin plate-like structural component with a small volume, saving space. When the heat exchange assembly 30 exchanges heat with the battery cell assembly 20, the end face of the heat exchange body 31 located in the second direction Y can be in close contact with the surface of the battery cell 21 for heat exchange, providing a larger heat exchange surface. This saves space inside the housing 10, allowing for the arrangement of a larger battery cell assembly 20 or facilitating the arrangement of other electrical components.

[0100] "In the second direction Y, the size of the connecting portion 3211 is smaller than the size of the blocking portion 3212." This means that in the second direction Y, one end face of the connecting portion 3211 may be aligned with the end face of the blocking portion 3212, or neither end face of the connecting portion 3211 may be aligned with the end face of the blocking portion 3212. For example, referring to FIG8, in the second direction Y, neither end face of the connecting portion 3211 is aligned with the end face of the blocking portion 3212.

[0101] Each sealing portion 3212 has an area not covered by the connecting portion 3211. This allows for a larger mating surface between each sealing portion 3212 and the connecting portion 323 during the molding of the adapter 323 onto the heat exchange body 31. Consequently, the sealing portion 321 as a whole also has a larger mating surface with the adapter 323, improving connection strength and reliability. Furthermore, more of the edge of each sealing portion 3212 that mates with the heat exchange channel 301 is exposed, allowing the adapter 323 to cover more of the edge areas of the sealing portion 3212 during molding.

[0102] In the above technical solution, the heat exchange body 31 can form a thin plate structure, which is easier to fit on the surface of the battery cell assembly 20 for heat exchange. This helps to save space inside the housing 10, provides more space for the battery cell assembly 20, increases the energy density of the battery device 100, and also provides more space for other electrical components. This facilitates the installation of internal components of the housing 10, reduces installation difficulty, and is beneficial for maintenance and repair. Each sealing part 3212 has an area not covered by the connecting part 3211. During the process of forming the adapter 323 on the heat exchange body 31, each sealing part 3212 and the adapter 323 can have a larger mating surface. The sealing part 321 as a whole and the adapter 323 also have a larger mating surface, which can improve the connection strength and reliability. Moreover, more of the edge position of each sealing part 3212 that mates with the heat exchange channel 301 is exposed. During the forming process of the adapter 323, more edge positions of the sealing part 3212 can be covered, which enhances the sealing and sealing effect of the sealing part 3212 on the heat exchange channel 301, thereby improving the reliability of the heat exchange assembly 30 and the battery device 100.

[0103] In some embodiments of this application, referring to Figures 8 to 14, the connecting part 3211 is provided with a relief groove 3211a on the side near the heat exchange body 31, and the connecting part 3211 is provided with a relief groove 3211a at the position of the flow channel wall 302 between any two adjacent heat exchange channels 301, and the relief groove 3211a abuts against the flow channel wall 302.

[0104] In the above technical solution, the clearance groove 3211a can stop and limit the flow channel wall 302, reducing the risk of displacement of the sealing part 3212 caused by the action of the connecting part 3211 and the sealing part 3212 during the formation of the adapter 323. This can improve the installation reliability of the sealing part 3212 in the heat exchange flow channel 301, thereby enhancing the sealing effect of the sealing part 3212 on the heat exchange flow channel 301.

[0105] In some embodiments of this application, referring to Figures 8 to 13, the connecting portion 3211 and the sealing portion 3212 are detachably connected. The detachable connection method between the connecting portion 3211 and the sealing portion 3212 may include, but is not limited to, snap-fit, screw-fit, or plug-in connections.

[0106] Understandably, since the heat exchanger body 31 is usually relatively thin, compared to manufacturing the plugging part 321 in one piece, the above-mentioned solution allows the connecting part 3211 and the plugging part 3212 to be manufactured separately. After manufacturing the connecting part 3211 and the plugging part 3212 separately, the two are then assembled. This reduces the manufacturing difficulty of the plugging part 321, improves the product yield, and also allows for the replacement of only the damaged part if either the connecting part 3211 or the plugging part 3212 is damaged, thus reducing the operating cost.

[0107] In some embodiments of this application, referring to Figures 8 and 9, one of the connecting part 3211 and the blocking part 3212 is provided with a latching protrusion 3201 and the other is provided with a latching groove 3202, and the latching groove 3202 and the latching protrusion 3201 are engaged and connected.

[0108] The protrusion 3201 can refer to a protruding protrusion, bulge, or hook structure. The slot 3202 can refer to a groove structure that can cooperate with the protrusion 3201 to provide a connection. For example, referring to Figures 8 and 9, the slot 3202 can be a bracket with a slot formed on it.

[0109] The connecting portion 3211 may be provided with a latching protrusion 3201, and the sealing portion 3212 may be provided with a latching groove 3202, which can be latched and connected to the latching protrusion 3201. The latching protrusion 3201 may be located directly opposite the connecting portion 3211 and close to the sealing portion 3212, and the latching groove 3202 may be located directly opposite the sealing portion 3212 and close to the connecting portion 3211. The latching protrusion 3201 may also be located on one, two, three, or four sides of the connecting portion 3211, and the latching groove 3202 may be located on the sealing portion 3212 at a position corresponding to the latching protrusion 3201. For example, referring to Figures 8 and 9, the latching protrusion 3201 is located on two sides of the connecting portion 3211 in the second direction Y, and two latching grooves 3202 are provided on the sealing portion 3212 along the second direction Y.

[0110] The connecting portion 3211 may also be provided with a slot portion 3202, and the sealing portion 3212 may be provided with a protrusion 3201. The slot portion 3202 and the protrusion 3201 can be engaged and connected. The protrusion 3201 may be located directly opposite the sealing portion 3212 and close to the connecting portion 3211, and the slot portion 3202 may be located directly opposite the connecting portion 3211 and close to the sealing portion 3212. The protrusion 3201 may also be provided on the sealing portion 3212 in the form of, but is not limited to, one, two, three, or four, etc., and the slot portion 3202 may be located on the connecting portion 3211 at a position corresponding to the protrusion 3201.

[0111] In the above technical solution, the connecting part 3211 and the sealing part 3212 can be connected and engaged with the slot part 3202 and the protrusion part 3201 through a snap-fit ​​connection. This disassembly and connection method has a simple structure, is easy to install or disassemble, and has a reliable connection, which can improve the connection reliability of the connecting part 3211 and the sealing part 3212.

[0112] In some embodiments of this application, referring to Figures 8 and 9, the card protrusion 3201 or the card slot 3202 is provided at opposite ends of the connecting portion 3211.

[0113] The connecting portion 3211 may be provided with a latching protrusion 3201. In this example, the latching protrusion 3201 may be provided at opposite ends of the connecting portion 3211. Alternatively, the connecting portion 3211 may be provided with a latching groove 3202. In this example, the latching groove 3202 may be provided at opposite ends of the connecting portion 3211. The opposite ends of the connecting portion 3211 may refer to either ends located in the second direction Y or either ends located in the third direction Z.

[0114] For example, referring to Figures 8 and 9, the connecting portion 3211 is provided with a latching protrusion 3201, which is provided at both ends of the connecting portion 3211 located in the second direction Y.

[0115] In the above technical solution, the two ends of the connecting part 3211 can be connected to the blocking part 3212 through the slot part 3202 and the protrusion part 3201, thereby playing a fixing role on the opposite sides of the connecting part 3211 and the blocking part 3212, bringing a more stable and balanced fixing effect, and further improving the connection reliability of the connecting part 3211 and the blocking part 3212.

[0116] In some embodiments of this application, referring to Figures 8 and 9, the card protrusion 3201 is provided on the connecting part 3211, and the card groove 3202 is provided on the blocking part 3212.

[0117] In the above technical solution, since the sealing part 3212 is sealed inside the heat exchange channel 301, and considering that the adapter 323 needs to wrap around the heat exchange body 31, the size of the sealing part 3212 is larger than that of the connecting part 3211. Therefore, setting the slot part 3202 on the sealing part 3212 can facilitate the processing of the slot part 3202 and reduce the manufacturing difficulty.

[0118] In some embodiments of this application, referring to FIG9, one of the connecting part 3211 and the sealing part 3212 is provided with a guide groove 3203, and the other is provided with a guide post 3204, with the guide post 3204 disposed in the guide groove 3203.

[0119] Guide groove 3203 and guide post 3204 can refer to structures that can cooperate with each other to perform a guiding function.

[0120] The connecting part 3211 may be provided with a guide groove 3203, and the sealing part 3212 may be provided with a guide post 3204. Alternatively, the connecting part 3211 may be provided with a guide post 3204, and the sealing part 3212 may be provided with a guide groove 3203 (see Figure 9).

[0121] In the above technical solution, the connecting part 3211 and the sealing part 3212 can improve the positioning accuracy of the connecting part 3211 and the sealing part 3212 during connection by the guiding action of the guide groove 3203 and the guide post 3204, and improve the success rate of the snap-fit ​​of the snap-fit ​​protrusion 3201 and the snap-fit ​​groove 3202, thereby improving the assembly efficiency.

[0122] In some embodiments of this application, referring to FIG9, the guide post 3204 is provided on the connecting part 3211, and the guide groove 3203 is provided on the sealing part 3212.

[0123] In the above technical solution, since the sealing part 3212 is sealed in the heat exchange channel 301, and considering that the adapter 323 needs to wrap around the heat exchange body 31, the size of the sealing part 3212 is larger than that of the connecting part 3211. Therefore, setting the guide groove 3203 on the sealing part 3212 can facilitate the processing of the guide groove 3203 and reduce the manufacturing difficulty.

[0124] In some embodiments of this application, referring to Figures 10 to 13, any two adjacent blocking portions 3212 can be detachably connected by a connecting portion 3211.

[0125] It is understood that a connecting part 3211 can be provided between any two adjacent blocking parts 3212, and they can be connected by the connecting part 3211. For example, referring to Figures 10 to 13, there are three blocking parts 3212 and two connecting parts 3211, and two adjacent blocking parts 3212 can be detachably connected by the connecting part 3211.

[0126] In the above technical solution, when there are a large number of sealing parts 3212, multiple sealing parts 3212 can be connected together sequentially through multiple connecting parts 3211. The connection method is more flexible, and each sealing part 3212 and connecting part 3211 is easier to operate during assembly, reducing assembly difficulty. When the heat exchange channel 301 corresponding to a certain sealing part 3212 fails, the connection between two adjacent sealing parts 3212 through the connecting part 3211 allows for more precise handling of the faulty part. Only the connecting part 3211 and sealing part 3212 at the faulty location need to be disassembled, without disassembling the connecting parts 3211 and sealing parts 3212 at other locations. The operating range is relatively small, which reduces maintenance difficulty and the risk of interfering with other normally operating sealing parts 3212. It also helps to save maintenance and material costs. When it is necessary to adjust the heat exchange capacity of the heat exchange component 30, such as adjusting the number of heat exchange channels 301 involved in heat exchange, the above solution can more easily start or shut down a single or part of the heat exchange channels 301. According to the actual heat exchange requirements, it can be flexibly adjusted by disassembling or installing the connection part 3211. There are fewer restrictions during the adjustment, which is conducive to the flexible adjustment of the heat exchange channels 301 in the heat exchange body 31.

[0127] In some embodiments of this application, referring to Figures 10 and 11, the connecting portion 3211 includes a first portion 3205 and a second portion 3206, which are detachably connected. The first portion 3205 is connected to one of the two adjacent blocking portions 3212, and the second portion 3206 is connected to the other of the two adjacent blocking portions 3212.

[0128] In the above technical solution, by setting the connecting part 3211 into a two-part structure and setting it on two adjacent sealing parts 3212, the two adjacent sealing parts 3212 can be detachably connected through the first part 3205 and the second part 3206. The sealing part 3212 does not need to be provided with a structure for detachable engagement, such as a slot or protrusion, which can reduce structural damage to the sealing part 3212, ensure the reliability of the sealing part 3212 itself, thereby enhancing the sealing effect of the sealing part 3212 on the heat exchange channel 301, simplifying the structure of the sealing part 3212, and reducing manufacturing costs.

[0129] In some embodiments of this application, one of two adjacent sealing portions 3212 is integrally formed with the first portion 3205, and the other is integrally formed with the second portion 3206.

[0130] The integral molding method of the first part 3205 and the corresponding sealing part 3212, and the second part 3206 and the corresponding sealing part 3212 can be, but is not limited to, injection molding, die casting or 3D printing, etc.

[0131] In the above technical solution, by integrally molding the first part 3205 with the corresponding sealing part 3212, the number of parts can be reduced, assembly steps can be reduced, and the assembly efficiency of the heat exchange assembly 30 can be improved. Furthermore, by making the first part 3205 and the corresponding sealing part 3212 a single unit, the overall structural strength and reliability of the sealing part 321 can be improved. Similarly, by integrally molding the second part 3206 with the corresponding sealing part 3212, the number of parts can be reduced, assembly steps can be reduced, and the assembly efficiency of the heat exchange assembly 30 can be improved. Moreover, by making the second part 3206 and the corresponding sealing part 3212 a single unit, the overall structural strength and reliability of the sealing part 321 can be improved.

[0132] In some embodiments of this application, referring to Figures 10 and 11, the first part 3205 is provided with a first insertion part 32051 extending out of the blocking part 3212, and the second part 3206 is provided with a first slot 3206a. The first slot 3206a and the first insertion part 32051 are inserted and engaged, and the first insertion part 32051 and the first slot 3206a extend along the interval direction of at least two blocking parts 3212.

[0133] In the above technical solution, the first part 3205 can be inserted and engaged through the first plug-in part 32051 and the first slot 3206a of the second part 3206, thereby making the two adjacent sealing parts 3212 detachably connected. This detachable method is simple to operate and relatively easy to manufacture, which can improve the efficiency of disassembly and assembly and reduce costs.

[0134] In some embodiments of this application, referring to Figures 12 and 13, the connecting portion 3211 is connected to one of the two adjacent blocking portions 3212 and includes an extension portion 3207 and a second insertion portion 3208. The extension portion 3207 is connected to the blocking portion 3212 and extends to the other of the two adjacent blocking portions 3212. The second insertion portion 3208 is provided on the extension portion 3207. The other of the two adjacent blocking portions 3212 is provided with a second slot 3212b, and the second slot 3212b and the second insertion portion 3208 are inserted and engaged.

[0135] The extension 3207 can refer to a long, strip-shaped component. The second insertion part 3208 can refer to a component that can perform an insertion function; for example, the second insertion part 3208 can be an insertion block.

[0136] The second slot 3212b can refer to a groove structure that can mate with the second insertion portion 3208. The shape of the second slot 3212b can match the shape of the second insertion portion 3208, and can be, but is not limited to, L-shaped or T-shaped, etc. For example, referring to FIG13, the shapes of the second insertion portion 3208 and the second slot 3212b are T-shaped.

[0137] In the above technical solution, the two adjacent blocking parts 3212 can be connected together by the insertion and engagement of the second plug-in part 3208 and the second slot 3212b. This detachable method is simple to operate, and since the second slot 3212b is set on the blocking part 3212, the connection between the connecting part 3211 and the blocking part 3212 is more firm and the connection is more reliable.

[0138] In some embodiments of this application, referring to FIG13, the second plug portion 3208 is provided at one end of the extension portion 3207 away from the current collector 322.

[0139] In the above technical solution, the second insertion part 3208 is provided on the end of the extension part 3207, which makes the overall structure of the connection part 3211 more compact, reduces the size of the connection part 3211 and reduces the weight, which is beneficial to improving the energy density of the battery device 100.

[0140] In some embodiments of this application, the connecting part 3211 and the corresponding sealing part 3212 are integrally formed parts.

[0141] In the above scheme, the integral molding method of the connecting part 3211 and the corresponding sealing part 3212 can be, but is not limited to, injection molding, die casting or 3D printing, etc.

[0142] In the above technical solution, the connecting part 3211 and the corresponding sealing part 3212 are integrally formed, which can reduce the number of parts, reduce assembly steps, improve the assembly efficiency of the heat exchange component 30, and also make the connecting part 3211 and the corresponding sealing part 3212 form an integral part, improve the overall structural strength, and improve the reliability of the sealing part 321.

[0143] In some embodiments of this application, the connecting portion 3211 and at least two sealing members 321 are integrally formed parts.

[0144] This can be understood as the connecting part 3211 simultaneously connecting all the sealing parts 321 and forming an integral part with all the sealing parts 321. The integral molding method of the connecting part 3211 and at least two sealing parts 321 can be, but is not limited to, injection molding, die casting, or 3D printing, etc.

[0145] In the above technical solution, the above structure can reduce the number of parts, reduce assembly steps, improve the assembly efficiency of heat exchange component 30, and also make the connecting part 3211 and at least two sealing parts 3212 form an integral part, improve the overall structural strength, and improve the reliability of sealing part 321.

[0146] In some embodiments of this application, the adapter 323 is integrally injection molded onto the heat exchange body 31.

[0147] It is understandable that the adapter 323 can be manufactured on the heat exchange body 31 by injection molding. Injection molding here can be, but is not limited to, overmolding injection molding, etc. For example, a mandrel can be inserted into the heat exchange channel 301 of the heat exchange body 31 that does not need to be sealed beforehand. Then, molds for injection molding the adapter 323 can be set at both ends of the heat exchange body 31 in the first direction X. By injecting injection liquid into the mold and cooling, the adapter 323 can be obtained. The adapter 323 formed in this way has a tighter and stronger connection with the heat exchange body 31 and is less likely to detach.

[0148] The adapter 323 can be made of plastic, and the current collector 322 can also be made of plastic. After molding, the adapter 323 can be fixed together with the current collector 322 by welding through hot melting of the plastic material.

[0149] The adapter 323 can also be partially made of plastic and partially made of metal, while the current collector 322 is made of metal. For example, the metal part of the adapter 323 can be pre-placed in a mold, the plastic part of the adapter 323 can be injection molded, and after the adapter 323 is formed, the metal part can be connected to the current collector 322 by welding.

[0150] In the above technical solution, the adapter 323 is injection molded onto the heat exchange body 31. The molding speed of the adapter 323 is relatively fast, which is easy for mass automated production and can improve production efficiency. This method can also give the adapter 323 high dimensional accuracy and high surface quality, which can improve the molding quality of the adapter 323, improve the connection reliability between the heat exchange body 31, the adapter 323 and the current collector 322, and thus improve the reliability of the battery device 100.

[0151] In some embodiments of this application, referring to Figures 8 to 13, the circumferential side 3212c of the sealing part 3212 around the first direction X is engaged with the inner wall of the heat exchange channel 301.

[0152] This can be understood as the peripheral side 3212c of the sealing part 3212 and the inner wall of the heat exchange channel 301 being either a transition fit or an interference fit. This approach reduces the risk of gaps appearing between the peripheral side 3212c and the inner wall of the heat exchange channel 301, lowering the probability of material entering gaps during the formation of the adapter 323 and causing it to fail to form. This improves the forming quality of the adapter 323 and enhances the connection reliability of the heat exchange body 31, the adapter 323, and the collector 322. Furthermore, this approach allows the sealing part 3212 to provide support within the heat exchange channel 301, reducing the likelihood of significant deformation of the heat exchange body 31 and improving the operational reliability of the heat exchange assembly 30.

[0153] In some embodiments of this application, referring to FIG15, the portion of the adapter 323 near the current collector 322 is configured as a weldable portion 3231, which is welded to the current collector 322.

[0154] The weldable part 3231 can refer to the part of the adapter 323 that is welded to the current collector 322.

[0155] For example, the adapter 323 may be made of plastic and injection molded onto the heat exchange body 31. The portion of the adapter 323 near the collector 322 forms a weldable portion 3231. The collector 322 may also be made of plastic. The weldable portion 3231 can be connected to the collector 322 by welding.

[0156] For example, the adapter 323 may also be made of metal and cast into the heat exchange body 31. In this case, the portion of the adapter 323 near the collector 322 forms a weldable portion 3231, which is welded to the collector 322.

[0157] In the above technical solution, the adapter 323 is welded to the collector 322 through the weldable part 3231, which can improve the connection strength between the adapter 323 and the collector 322, improve the connection reliability, and thus improve the overall reliability of the heat exchange assembly 30.

[0158] In some embodiments of this application, referring to Figures 15 and 16, the weldable part 3231 is an annular structure arranged circumferentially around the adapter 323, and the collector 322 is provided with a groove 322b at one end near the adapter 323. The groove 322b is an annular structure arranged circumferentially around the collector cavity 3221, and the weldable part 3231 is provided in the groove 322b.

[0159] The recess 322b can refer to a groove structure provided on the manifold 322. The shape of the recess 322b can match the shape of the weldable part 3231.

[0160] In the above technical solution, the weldable part 3231 can be embedded in the groove 322b of the current collector 322, thereby pre-positioning and installing the adapter 323 onto the current collector 322, so that the adapter 323 and the current collector 322 have a relatively accurate relative position before connection, which facilitates subsequent welding, bonding or other connection between the adapter 323 and the current collector 322. It can also increase the pre-tightening force before connection between the adapter 323 and the current collector 322, and improve the overall structural strength after connection, which can enhance connection stability, improve the reliability of the heat exchange component 30, provide more reliable heat exchange for the battery cell component 20, and improve the reliability of the battery device 100.

[0161] In some embodiments of this application, referring to Figures 6 and 17, the heat exchange body 31 includes a shell 311 and 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. There are multiple partitions 312, which are disposed inside the shell 311. The partitions 312 are inclined relative to the second direction Y. Heat exchange channels 301 are formed between the partitions 312 and the shell wall of the shell 311, and between any two adjacent partitions 312.

[0162] The partition 312 can be a thin plate that serves as a divider inside the housing 311. Optionally, in the first direction X, the size of the partition 312 can be equal to the size of the housing 311, and the two ends of the partition 312 in the second direction Y can be connected to the inner wall of the heat exchange channel 301.

[0163] "The dimension of the shell 311 in the second direction Y is smaller than the dimension of the shell 311 in the third direction Z." Therefore, the cross-section of the shell 311 perpendicular to the first direction X is rectangular. Optionally, the rectangle can be constructed as a long strip, which allows the shell 311 to form a thinner shell structure, thus saving space.

[0164] "The partition 312 is inclined relative to the second direction Y" can be understood as the partition 312 not only separates the internal space of the shell 311 to form the heat exchange channel 301, but also acts as a rib to improve the overall structural strength and rigidity of the heat exchange body 31.

[0165] The heat exchange body 31, consisting of the shell 311 and multiple baffles 312, can form a "harmonica tube" structure, which is simple in structure and easy to manufacture. The shell 311 and multiple baffles 312 can be integrally formed or separately arranged; no specific restrictions are imposed here.

[0166] In the above technical solution, by configuring the heat exchange body 31 to include a shell 311 and a partition 312, the heat exchange body 31 can form a thin shell structure, which has a high heat exchange efficiency while having a small volume, saving space inside the housing 10. The partition 312 can also form diagonal ribs inside the shell 311, which can improve the overall strength of the heat exchange body 31, reduce the risk of large deformation of the shell 311, improve the reliability of the heat exchange body 31, and thus improve the reliability of the battery device 100.

[0167] In some embodiments of this application, the housing 311 and the partition 312 are integrally formed. This integral forming method reduces the number of parts and assembly steps, thereby improving production efficiency. Furthermore, this solution enhances the overall strength and rigidity of the heat exchange body 31, reducing the risk of significant deformation or damage, thus improving the reliability of the heat exchange body 31 and consequently the reliability of the heat exchange assembly 30, ultimately enhancing the reliability of the battery device 100.

[0168] In some embodiments of this application, referring to FIG17, the shell walls at both ends of the housing 311 in the third direction Z are configured as arc-shaped walls 311a. In this technical solution, the arc-shaped walls 311a can reduce the stress concentration problem at both ends of the housing 311 in the third direction Z, thereby improving the reliability of the housing 311.

[0169] In some embodiments of this application, the cross-sectional shape of the heat exchange channel 301 and the cross-sectional shape of the sealing member 321 are the same on a section plane perpendicular to the first direction X.

[0170] In the above technical solution, by having the same cross-sectional shape for the heat exchange channel 301 and the sealing element 321, the sealing element 321 and the inner wall of the heat exchange channel 301 can fit well together. This facilitates the sealing of the sealing element 321 within the heat exchange channel 301, reduces the risk of gaps, and ensures that the sealing element 321 can bear pressure evenly in all directions within the heat exchange channel 301. It also helps maintain a sealed state between the sealing element 321 and the inner wall of the heat exchange channel 301. Because the heat exchange channel 301 and the sealing element 321 have the same cross-sectional shape, the sealing element 321 can also provide support inside the heat exchange channel 301, reducing the risk of large deformation of the heat exchange body 31 under stress. This helps reduce the risk of a reduction in the flow cross-section of the heat exchange channel 301, thereby improving the heat exchange reliability of the heat exchange body 31.

[0171] In some embodiments of this application, the heat exchange body 31 is made of metal or non-metal; and / or, the collector 322 is made of metal or non-metal.

[0172] It is understood that the heat exchanger body 31 can be made of metal or non-metal; the manifold 322 can also be made of metal or non-metal. Metal materials can include, but are not limited to, copper, copper alloys, aluminum alloys, etc., while non-metal materials can include, but are not limited to, plastics, ceramics, etc. The heat exchanger body 31 and the manifold 322 can be made of the same material or different materials.

[0173] Especially when the heat exchanger body 31 and the collector 322 are made of different materials, for example, the heat exchanger body 31 is made of metal and the collector 322 is made of non-metal; or, the heat exchanger body 31 is made of non-metal and the collector 322 is made of metal, the adapter 323 is injection molded onto the heat exchanger body 31 and the collector 322. This facilitates the connection between the heat exchanger body 31 and the collector 322 made of different materials, reduces the installation difficulty of the heat exchanger body 31 and the collector 322, and improves the reliability of the connection between the heat exchanger body 31 and the collector 322.

[0174] In this technical solution, the heat exchanger body 31, being made of metal, offers better thermal conductivity, which is beneficial for improving heat exchange efficiency. Alternatively, the heat exchanger body 31 can be made of non-metallic material, which helps reduce costs while still meeting thermal conductivity requirements. The current collector 322, being made of metal, provides higher rigidity and strength, reducing the risk of damage. Conversely, a non-metallic current collector 322 can reduce costs while still meeting rigidity and strength requirements. By using the aforementioned materials for the heat exchanger body 31 and the current collector 322, more options and greater flexibility are available.

[0175] This application provides an electrical device 1000, including a battery device 100 as described in any of the preceding embodiments, the battery device 100 being used to store or provide electrical energy.

[0176] In the above technical solution, since the battery device 100 has high reliability, using the battery device 100 to store or provide electrical energy can improve the reliability of power supply, thereby improving the reliability of the power supply device 1000.

[0177] Example 1

[0178] Referring to Figures 3 to 9, a battery device 100 provided according to an embodiment of this application includes: a housing 10, a battery cell assembly 20, and a heat exchange assembly 30.

[0179] The battery cell assembly 20 is housed within the housing 10 and includes multiple rows of battery cells 21, with each row containing multiple battery cells 21. A heat exchange assembly 30 is housed within the housing 10 for heat exchange with the battery cell assembly 20.

[0180] The heat exchange component 30 is housed inside the housing 10 and exchanges heat with the battery cell assembly 20. The heat exchange component 30 includes a heat exchange body 31 and a current collection structure 32.

[0181] The heat exchanger body 31 is a harmonica tube cold plate. The dimension of the harmonica tube cold plate in the first direction X is larger than its dimension in the third direction Z, and the dimension of the harmonica tube cold plate in the third direction Z is larger than its dimension in the second direction Y. The first direction X is the length direction of the heat exchanger body 31. The heat exchanger body 31 includes a plurality of heat exchange channels 301 extending along the first direction X.

[0182] The flow collection structure 32 is located at both ends of the heat exchange body 31 in the first direction X. The flow collection structure 32 includes a sealing component 321, a connecting component 323 and a flow collection component 322.

[0183] The sealing component 321 includes a connecting portion 3211 and three sealing portions 3212. The three sealing portions 3212 are connected by a connecting portion 3211 and can seal within three heat exchange channels 301. The connecting portion 3211 has locking protrusions 3201 at both ends in the second direction Y. The sealing portions 3212 have two locking grooves 3202 spaced apart along the second direction Y. The locking grooves 3202 are constructed as supports, with locking grooves formed on the supports, and can engage with the locking protrusions 3201. The connecting portion 3211 also has a guide post 3204, and the sealing portions 3212 have guide grooves 3203 that can engage with the guide post 3204.

[0184] The adapter 323 is injection molded onto the heat exchange body 31 and partially wraps around the outer peripheral surface of the heat exchange body 31. The inside of the collector 322 has a collector cavity 3221. The collector 322 is sealed and connected to the heat exchange body 31 through the adapter 323 so that the collector cavity 3221 and the heat exchange channel 301 are connected. The collector 322 is provided with a connecting port 322a that connects to the collector cavity 3221. The connecting port 322a can be used for the entry and exit of the heat exchange medium so that the heat exchange medium can flow between the collector cavity 3221 and the heat exchange channel 301.

[0185] Example 2

[0186] Referring to Figures 3 to 7, 10 and 11, a battery device 100 according to an embodiment of this application has a structure that is substantially the same as that of the battery device 100 in embodiment 1, except that:

[0187] Two adjacent blocking parts 3212 are connected by a connecting part 3211. The connecting part 3211 includes a first part 3205 and a second part 3206. The first part 3205 is located at both ends of the three blocking parts 3212, and the second part 3206 is located in the middle. The first part 3205 is provided with a first insertion part 32051 extending out of the blocking part 3212, and the second part 3206 is provided with a first slot 3206a. The first slot 3206a and the first insertion part 32051 are inserted and engaged.

[0188] Example 3

[0189] Referring to Figures 3 to 7, 12 and 13, a battery device 100 according to an embodiment of this application has a structure that is substantially the same as that of the battery device 100 in embodiment two, except that:

[0190] Two adjacent blocking parts 3212 are connected by a connecting part 3211. The two blocking parts 3212 at both ends are provided with connecting parts 3211. The connecting part 3211 includes an extension part 3207 and a second insertion part 3208. The extension part 3207 connects to the blocking part 3212 and extends toward the blocking part 3212 located in the middle position. The blocking part 3212 located in the middle position is provided with a second slot 3212b. The second slot 3212b and the second insertion part 3208 are inserted and engaged.

[0191] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The above are merely preferred embodiments of this application and are not intended to limit the application. For those skilled in the art, unless otherwise specified, all implementation methods and optional implementation methods of this application can be combined to form new technical solutions. Unless otherwise specified, all technical features and optional technical features of this application can be combined to form new technical solutions. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, wherein, include: Box; The battery cell assembly is housed within the casing; A heat exchange assembly, housed within the housing, exchanges heat with the individual battery cells. The heat exchange assembly includes: The heat exchanger body includes multiple heat exchange channels extending along a first direction; A flow collection structure is provided at both ends of the heat exchange body in the first direction. The flow collection structure includes a sealing component, a connecting component, and a flow collection component. The sealing component includes a connecting portion and at least two sealing portions. The at least two sealing portions are connected through the connecting portion and can seal within at least two heat exchange channels. The connecting component is formed on the heat exchange body. A flow collection cavity is formed inside the flow collection component. The flow collection component is sealed and connected to the heat exchange body through the connecting component to allow the flow collection cavity and the heat exchange channels to communicate. The flow collection component has a connecting port that connects to the flow collection cavity. The connecting port can be used for the inlet and outlet of the heat exchange medium to allow the heat exchange medium to flow between the flow collection cavity and the heat exchange channels.

2. The battery device according to claim 1, wherein, The blocking part has an outer surface near the collector, and on a reference plane parallel to the outer surface, the area of ​​the connection part projected onto the reference plane is smaller than the area of ​​the outer surface.

3. The battery device according to claim 2, wherein, The heat exchange body has a larger dimension in the first direction and the third direction than in the second direction. The plurality of heat exchange channels are spaced apart along the third direction. In the second direction, the dimension of the connecting part is smaller than the dimension of the sealing part. The first direction, the second direction and the third direction are perpendicular to each other.

4. The battery device according to any one of claims 1 to 3, wherein, The connecting part and the sealing part are detachably connected.

5. The battery device according to claim 4, wherein, One of the connecting part and the sealing part is provided with a locking protrusion, and the other is provided with a locking groove. The locking groove and the locking protrusion are engaged and connected.

6. The battery device according to claim 5, wherein, The card protrusion or the card slot is located at opposite ends of the connecting part.

7. The battery device according to claim 5 or 6, wherein, The protruding part is provided on the connecting part, and the slot part is provided on the sealing part.

8. The battery device according to any one of claims 5 to 7, wherein, One of the connecting part and the sealing part is provided with a guide groove, and the other is provided with a guide post, with the guide post located in the guide groove.

9. The battery device according to claim 8, wherein, The guide post is provided on the connecting part, and the guide groove is provided on the sealing part.

10. The battery device according to any one of claims 1 to 3, wherein, Any two adjacent sealing parts can be detachably connected via the connecting part.

11. The battery device according to claim 10, wherein, The connecting part includes a first part and a second part, which are detachably connected. The first part is connected to one of the two adjacent sealing parts, and the second part is connected to the other of the two adjacent sealing parts.

12. The battery device according to claim 11, wherein, One of the two adjacent sealing parts is integrally formed with the first part, and the other is integrally formed with the second part.

13. The battery device according to claim 11 or 12, wherein, The first part is provided with a first plug-in portion extending out of the sealing portion, and the second part is provided with a first slot. The first slot and the first plug-in portion are plugged into each other, and the first plug-in portion and the first slot extend along the interval direction of the at least two sealing portions.

14. The battery device according to claim 10, wherein, The connecting part is connected to one of the two adjacent blocking parts and includes an extension part and a second plug-in part. The extension part is connected to the blocking part and extends to the other of the two adjacent blocking parts. The second plug-in part is provided on the extension part. The other of the two adjacent blocking parts is provided with a second slot. The second slot and the second plug-in part are plugged into each other.

15. The battery device according to claim 14, wherein, The second plug portion is located at the end of the extension portion away from the current collector.

16. The battery device according to claim 14, wherein, The connecting part and the corresponding sealing part are integrally formed parts.

17. The battery device according to any one of claims 1 to 3, wherein, The connecting part and the at least two sealing parts are integrally formed.

18. The battery device according to any one of claims 1 to 3, wherein, The adapter is integrally injection molded onto the heat exchange body.

19. The battery device according to any one of claims 1 to 3, wherein, The heat exchanger body is made of metal or non-metal; and / or, the collector is made of metal or non-metal.

20. An electrical appliance, wherein, Includes a battery device as described in any one of claims 1 to 19, the battery device being used to store or provide electrical energy.

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