Battery device and electrical device

Abstract

A battery device (100) and an electrical device (1000). The battery device comprises: a case (10); a battery cell assembly (20), which is accommodated in the case; and a heat exchange assembly (30), which is accommodated in the case. The heat exchange assembly comprises: a heat exchange body (31) which comprises a plurality of heat exchange flow channels (301) extending in a first direction, wherein the heat exchange body is provided with a limiting portion (302), and at least part of the limiting portion is arranged in the heat exchange flow channels in a protruding manner; and current collecting structures (32) which are arranged at two ends of the heat exchange body in the first direction, each current collecting structure comprising a blocking member (321), an adapter member (323) and a current collecting member (322), wherein the blocking member is blocked in at least one of the heat exchange flow channels and cooperates with and is limited by the limiting portion, the adapter member is formed on the heat exchange body, a current collecting cavity (3221) is formed inside the current collecting member, the current collecting member sealingly cooperates with and is connected to the heat exchange body by means of the adapter member, and the current collecting member is provided with a communication port (322a) in communication with the current collecting cavity.

Description

Battery devices and electrical appliances

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on and claims priority to Chinese patent applications No. 202411794500.7, 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 for heat exchange with the battery cell assembly. The heat exchange assembly includes: a heat exchange body comprising a plurality of heat exchange channels extending along a first direction, the heat exchange body having a limiting portion, at least a portion of the limiting portion protruding within the heat exchange channels; and a flow collection structure disposed at both ends of the heat exchange body in the first direction, the flow collection structure including a sealing member, a connecting member, and a flow collector, the sealing member sealing within at least one heat exchange channel and limitingly engaging with the limiting portion, the connecting member being formed on the heat exchange body, the flow collector having a flow collection cavity formed inside, the flow collector being sealed and connected to the heat exchange body via the connecting member to allow communication between the flow collection cavity and the heat exchange channels, and the flow collector having a connecting port communicating with the flow collection cavity, the connecting port being 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.

[0007] In the above technical solution, 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 transition component, when the heat exchange body is connected to the current collection structure, the transition component is formed on the heat exchange body and then connected to the current collector. This prevents the current collector from being directly connected to the heat exchange body. The transition 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, current collector, and transition component, improves connection reliability, reduces the risk of leakage, and improves the reliability of the battery device. Limiting the sealing component with a limiting part reduces the risk of displacement of the sealing component during the forming process of the transition component. This improves the sealing effect of the sealing component on the heat exchange channel at its location, meeting the heat exchange design requirements of the heat exchange assembly. It also improves the forming quality of the transition component, enhances the connection strength and reliability between the transition component and the heat exchange body, thereby improving the reliability of the heat exchange assembly and the battery device.

[0008] In some embodiments of this application, the limiting part is located on the side of the sealing member near the heat exchange channel and abuts against the sealing member. In this technical solution, by limiting the sealing member against the sealing member on the inner side of the heat exchange channel, the sealing member only needs to be inserted into the heat exchange channel and contact the limiting part to be limited. Therefore, the limiting method of the limiting part and the sealing member is relatively simple and the limiting reliability is also relatively good, which is beneficial to improving the reliability of the sealing member in the heat exchange channel.

[0009] In some embodiments of this application, the limiting portion abuts against at least two opposing edges of the sealing member.

[0010] In the above technical solution, by limiting at least two opposite edges of the sealing member by the limiting part, the limiting area of ​​the limiting part on the sealing member can be increased, thereby improving the limiting reliability and stability, enhancing the sealing effect of the sealing member on the heat exchange channel, and thus improving the working reliability of the heat exchange component.

[0011] In some embodiments of this application, the dimensions of the heat exchange body in the first direction and the third direction are larger than the dimensions in the second direction, and the first direction, the second direction and the third direction are perpendicular to each other; the limiting part abuts against the edges of both ends of the sealing member in the second direction.

[0012] 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 space for other electrical components. This facilitates the installation of internal components, reduces installation difficulty, and improves maintenance and repair. Furthermore, the above solution allows the limiting part to be located on the large surface of the heat exchanger body, reducing the manufacturing difficulty of the limiting part, improving its molding quality, and enabling the limiting part to provide more reliable limiting for the sealing components.

[0013] In some embodiments of this application, the sealing elements are located at both ends in the second direction and abut against the inner wall of the heat exchange channel.

[0014] In the above technical solution, the above structure enables the sealing component to be installed more tightly in the heat exchange channel, improving the installation reliability of the sealing component and enhancing the sealing effect. On the other hand, when the heat exchange body is under stress, the sealing component can play a supporting role inside the heat exchange channel, reducing the probability of large deformation of the heat exchange body and reducing the risk of damage to the heat exchange body. This reduces the risk of heat exchange efficiency being affected by the reduction of the channel cross-section, thereby improving the heat exchange reliability of the heat exchange body, providing a more stable working environment for the battery cell assembly, and thus improving the reliability of the battery device.

[0015] In some embodiments of this application, a gap is formed between at least one end of the sealing member in a third direction and the inner wall of the heat exchange channel. The sealing member has a circumferential surface arranged around a first direction, and the circumferential surface is provided with a receiving groove, which is an annular structure arranged around the first direction.

[0016] In the above technical solution, during the process of forming the adapter in the heat exchange body, the overflow material can enter the receiving groove through the gap. Since the receiving groove is annular, the overflow material can form a seal between the circumferential surface of the sealing component and the inner wall of the heat exchange channel. On the one hand, this can improve the sealing effect of the sealing component on the heat exchange channel, and on the other hand, it can reduce the problem of overflow material entering the heat exchange channel where the sealing component is located, which would prevent the adapter from forming well. This can improve the forming reliability of the adapter, thereby improving the reliability of the heat exchange assembly and the battery device.

[0017] In some embodiments of this application, the portion of the limiting part within the corresponding heat exchange channel is an elongated strip extending in a third direction. In the above technical solution, the elongated structure of the limiting part further increases the limiting support surface for the sealing member and further enhances the limiting effect of the limiting part on the sealing member, thereby improving the installation reliability of the sealing member within the heat exchange channel and enhancing the sealing effect of the sealing member on the heat exchange channel.

[0018] In some embodiments of this application, in a third-party direction, the dimension of the limiting portion within the corresponding heat exchange channel is greater than or equal to the dimension of the corresponding edge portion. In this technical solution, a sufficiently large limiting support surface can be formed between the limiting portion and the sealing member through the aforementioned structure, resulting in better limiting effect of the limiting portion on the sealing member and more reliable installation of the sealing member within the heat exchange channel.

[0019] In some embodiments of this application, the limiting portion includes a first surface facing the current collector, and the heat exchange channel includes a second surface located on the side of the limiting portion closer to the current collector, with the second surface and the first surface forming an angle. In this technical solution, the limiting portion is disposed within the heat exchange channel using the above structure, which is relatively simple, reduces the weight of the heat exchange body, and is beneficial to improving the energy density of the battery device.

[0020] In some embodiments of this application, the limiting portion is a protruding structure that protrudes relative to the inner wall surface of the heat exchange channel. In the above technical solution, the above structure makes it easier to form the limiting portion inside the heat exchange channel, reducing the manufacturing difficulty of the limiting portion, thereby improving the overall forming quality of the heat exchange body, improving manufacturability, and increasing product yield, thereby reducing manufacturing costs.

[0021] In some embodiments of this application, a portion of the heat exchange body is pressed into the interior of the heat exchange channel to form a limiting portion, and a groove is formed on the outer side of the heat exchange body.

[0022] In the above technical solution, the heat exchanger body can form a protruding limiting part inside the heat exchange channel by external stamping. This reduces the difficulty of forming the limiting part and improves manufacturability. Furthermore, since the limiting part has a groove on the outer side corresponding to the heat exchanger body, it facilitates determining the limiting position between the limiting part and the sealing component, ensuring a smooth fit between them. The limiting part formed in this way also acts as a reinforcing rib, increasing the strength of the sealing component location within the heat exchanger body, thereby improving the reliability of the heat exchanger body and ultimately enhancing heat exchange reliability.

[0023] In some embodiments of this application, the limiting part and the groove are annular structures arranged circumferentially around the heat exchange body.

[0024] In the above technical solution, the limiting part and groove with the above structure can be formed inside all heat exchange channels by a one-time stamping process on the outside of the heat exchange body, which can reduce the number of forming steps for the limiting part and improve manufacturing efficiency. Moreover, since the limiting part is formed inside all heat exchange channels, each heat exchange channel can be limited and matched with the sealing part, thereby allowing the number and placement of the sealing parts to be flexibly adjusted as needed, which is beneficial to meeting the different heat exchange capacity requirements of the heat exchange components.

[0025] In some embodiments of this application, there are multiple limiting parts, which are arranged sequentially at intervals. The number of limiting parts is at least equal to the number of sealing parts, and they are located at the position of the sealing part corresponding to the heat exchange body.

[0026] In the above technical solution, by forming multiple limiting parts on the heat exchange body, and the multiple limiting parts forming a discontinuous structure, the amount of material used in the limiting parts can be reduced, which is beneficial to reducing the weight of the heat exchange body and improving the energy density of the battery device.

[0027] In some embodiments of this application, the portion of the adapter near the current collector is constructed as a weldable part, which is welded to the current collector. In this technical solution, the adapter is welded to the current collector via the weldable part, which improves the connection strength between the adapter and the current collector, enhances connection reliability, and thus improves the overall reliability of the heat exchange assembly.

[0028] In some embodiments of this application, the end of the sealing member away from the collector is provided with a guide surface, the sealing member has a central axis arranged along a first direction, and the distance between the guide surface and the central axis gradually decreases from the direction of the collector to the heat exchange body.

[0029] In the above technical solution, the guide surface can guide the sealing component during installation into the heat exchange channel, helping the sealing component to be more smoothly aligned with the opening of the heat exchange channel. Moreover, it can allow for a certain positional deviation during the installation of the sealing component, thereby providing a certain fault tolerance for the installation of the sealing component, reducing the installation difficulty of the sealing component in the heat exchange channel, and ensuring that the assembly of the sealing component and the heat exchange body can be completed smoothly, thus improving the assembly efficiency of the sealing component.

[0030] In some embodiments of this application, the heat exchange body includes a shell and partitions. The shell is open at both ends in the first direction. The size of the shell in the second direction is smaller than the size of the shell in the third direction. The third direction, the second direction and the first direction are perpendicular to each other. There are multiple partitions disposed inside the shell. The partitions are inclined relative to the second direction. Heat exchange channels are formed between the partitions and the shell wall of the shell, and between any two adjacent partitions. A limiting part is disposed on the shell.

[0031] In the above technical solution, by configuring the heat exchanger body to include a shell and a partition, the heat exchanger body as a whole can form a thin shell structure, which has a high heat exchange efficiency while having a small volume, thus saving space inside the housing. The partition can also form diagonal ribs inside the shell, which can improve the overall strength of the heat exchanger body, reduce the risk of large deformation of the shell, improve the reliability of the heat exchanger body, and thus improve the reliability of the battery device.

[0032] In some embodiments of this application, the adapter is injection molded onto the heat exchanger body. In this technical solution, the adapter is injection molded onto the heat exchanger body, which allows for faster molding, facilitates mass automated production, and improves production efficiency. This method also enables the adapter to have higher dimensional accuracy and surface quality, improving the molding quality of the adapter, enhancing the connection reliability between the heat exchanger body, the adapter, and the current collector, and ultimately improving the reliability of the battery device.

[0033] 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.

[0034] 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.

[0035] 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

[0036] 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.

[0037] Figure 1 is a schematic diagram of the structure of an electrical device provided in some embodiments of this application as a vehicle;

[0038] Figure 2 is an exploded view of the structure of a battery device provided in some embodiments of this application;

[0039] Figure 3 is a partial structural schematic diagram of a battery device provided in some embodiments of this application;

[0040] Figure 4 is a three-dimensional structural schematic diagram of the heat exchange component provided in some embodiments of this application;

[0041] Figure 5 is a partial structural schematic diagram of a heat exchange component provided in some embodiments of this application;

[0042] Figure 6 is a partial structural cross-sectional view of a heat exchange component provided in some embodiments of this application;

[0043] Figure 7 is an exploded view of a partial structure of a heat exchange component provided in some embodiments of this application;

[0044] Figure 8 is a partial three-dimensional structural schematic diagram of the heat exchanger body provided in some embodiments of this application;

[0045] Figure 9 is a three-dimensional structural schematic diagram of the sealing component provided in some embodiments of this application;

[0046] Figure 10 is a partial structural cross-sectional view of a heat exchange component provided in some embodiments of this application;

[0047] Figure 11 is a partial cross-sectional view of the heat exchange assembly provided in some embodiments of this application;

[0048] Figure 12 is a front view of a heat exchanger body provided in some embodiments of this application;

[0049] Figure 13 is a magnified view of part I in Figure 11;

[0050] Figure 14 is a three-dimensional structural schematic diagram of a sealing component provided in another embodiment of this application;

[0051] Figure 15 is a partial structural cross-sectional view of a heat exchange component provided in some embodiments of this application;

[0052] Figure 16 is a partial structural schematic diagram of the heat exchanger body provided in some embodiments of this application;

[0053] Figure 17 is a partial structural schematic diagram of a heat exchanger body provided in another embodiment of this application;

[0054] Figure 18 is a partial three-dimensional structural schematic diagram of a heat exchanger body provided in another embodiment of this application;

[0055] Figure 19 is a three-dimensional structural schematic diagram of the adapter provided in some embodiments of this application;

[0056] Figure 20 is a three-dimensional structural diagram of a current collector provided in some embodiments of this application.

[0057] 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; 301a, Second surface; 302, Limiting part; 302a, First surface; 303, Groove; 311, Shell; 311a, Arc-shaped wall; 312, Partition; 32, Current collection structure; 321, Sealing component; 321a, Circumferential surface; 321b, Receiving groove; 321c, Guide surface; 3211, Edge part; 322, Current collector; 3221, Current collection cavity; 322a, Connecting port; 322b, Settlement groove; 323, Adapter; 3231, Weldable part; 324, Gap; 200, Controller; 300, Motor; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] In this application, "multiple" means two or more (including two).

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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 for heat exchange 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 heat exchange body has a limiting portion, at least a portion of which protrudes into the heat exchange channels. 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 seals within at least one heat exchange channel and engages with the limiting portion. The connecting component is formed on the heat exchange body. The flow collector has a flow collection cavity formed inside. The flow collector is sealed and connected to the heat exchange body via the connecting component, thereby connecting the flow collection cavity and the heat exchange channels. The flow collector 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, allowing the heat exchange medium to flow between the flow collection cavity and the heat exchange channels.

[0074] In the battery device with the above-described structure, the heat exchange assembly is configured to include a heat exchange body and a current collection structure. The current collection structure includes a sealing element, a current collector, and a connecting element. When the heat exchange body is connected to the current collection structure, the connecting element is formed on the heat exchange body and then connected to the current collector. This prevents the current collector from being directly connected to the heat exchange body. The connecting element 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, current collector, and connecting element, improves connection reliability, reduces the risk of leakage, and enhances the reliability of the battery device. Limiting the sealing element with a limiting part reduces the risk of displacement of the sealing element during the forming process, which helps improve the sealing effect of the sealing element on the heat exchange channel at its location, meeting the heat exchange design requirements of the heat exchange assembly. It also helps improve the forming quality of the connecting element, increases the connection strength and reliability between the connecting element and the heat exchange body, thereby improving the reliability of the heat exchange assembly and the battery device.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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 multiple rows of battery cells 21, which are arranged along the length of the housing 10. Each row of battery cells 21 includes multiple battery cells 21 arranged along the width of the housing 10; or, multiple rows of battery cells 21 are arranged along the width of the housing 10, and each row of battery cells 21 includes multiple battery cells 21 arranged along the length of the housing 10.

[0082] 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.

[0083] According to some embodiments of this application, referring to FIG3, 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 for heat exchange 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 heat exchange body 31 is provided with a limiting portion 302, at least a portion of which protrudes into the heat exchange channels 301; the current collection structure 32 is disposed at both ends of the heat exchange body 31 located in the first direction X. The flow collection structure 32 includes a sealing member 321, a connecting member 323, and a flow collection member 322. The sealing member 321 seals at least one heat exchange channel 301 and is limited by a limiting member 302. The connecting member 323 is formed on the heat exchange body 31. The flow collection member 322 has a flow collection cavity 3221 inside. The flow collection member 322 is sealed and connected to the heat exchange body 31 through the connecting member 323, so that the flow collection cavity 3221 and the heat exchange channel 301 are connected. The flow collection member 322 is provided with a connecting port 322a that connects to the flow collection 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 flow collection cavity 3221 and the heat exchange channel 301.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] The limiting part 302 can refer to a structure or component formed on the heat exchange body 31 that can limit the sealing member 321. "At least a portion of the limiting part 302 protrudes into the heat exchange channel 301" can be understood as the limiting part 302 being entirely located within the heat exchange channel 301 and protruding relative to the inner wall surface of the heat exchange channel 301; the limiting part 302 can also refer to a part located on the outside of the heat exchange body 31 and another part located within the heat exchange channel 301 and protruding relative to the inner wall surface of the heat exchange channel 301.

[0089] 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.

[0090] The sealing component 321 can refer to a component capable of sealing the heat exchange channel 301. Referring to Figures 6 and 7, exemplarily, the sealing component 321 can be a plug or blockage, partially or completely embedded in the heat exchange channel 301 to seal it. The number of sealing components 321 can be one or more, allowing selection of the number of heat exchange channels 301 to be sealed, thereby adjusting the heat exchange capacity of the heat exchange assembly 30 to meet different usage requirements. The material of the sealing component 321 can include, but is not limited to, wood, rubber, or plastic. The sealing component 321 and the limiting part 302 can be limited by end abutment, for example, the limiting part 302 abutting against one end of the sealing component 321; the sealing component 321 and the limiting part 302 can also be limited by mutual engagement, for example, the limiting part 302 being an elastic buckle, and the sealing component 321 having a limiting groove, with the elastic buckle and the limiting groove cooperating for limiting; no specific limitations are made here.

[0091] 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.

[0092] 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.

[0093] "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.

[0094] 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.

[0095] 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.

[0096] Since the sealing component 321 is close to the outer side of the heat exchange body 31, during the process of forming the adapter 323 in the heat exchange body 31, the material forming the adapter 323 (such as injection molding liquid or casting liquid) will act on the sealing component 321. By limiting the sealing component 321 through the limiting part 302, the sealing component 321 can be fixed better, which is beneficial for the sealing component 321 to block the heat exchange flow channel 301. It can also reduce the risk of the sealing component 321 shifting during the forming process of the adapter 323, and reduce the probability that the material forming the adapter 323 will enter the space formed after the sealing component 321 shifts, causing the adapter 323 to fail to form well. This can improve the forming quality of the adapter 323 and improve the connection strength and reliability between the adapter 323 and the heat exchange body 31.

[0097] 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 limiting the sealing member 321 with the limiting part 302, the risk of displacement of the sealing member 321 during the molding process of the adapter 323 can be reduced. This is beneficial to improving the sealing effect of the sealing member 321 on the heat exchange channel 301 at its location, so as to meet 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, thereby improving the reliability of the heat exchange assembly 30 and the reliability of the battery device 100.

[0098] In some embodiments of this application, referring to FIG6, the limiting part 302 is provided on the side of the sealing member 321 near the heat exchange channel 301 and abuts against the sealing member 321.

[0099] In the above technical solution, by limiting the sealing member 321 by the limiting part 302 on the inside of the heat exchange channel 301, the sealing member 321 only needs to be sent into the heat exchange channel 301 and contact the limiting part 302 to be limited. Therefore, the limiting method of the limiting part 302 and the sealing member 321 is relatively simple and the limiting reliability is also relatively good, which is conducive to improving the reliability of the sealing member 321 in the heat exchange channel 301.

[0100] In some embodiments of this application, referring to Figures 9 and 10, the limiting portion 302 abuts against at least two opposing edge portions 3211 of the sealing member 321.

[0101] The limiting part 302 can abut against the two opposite edge parts 3211 of the sealing member 321. For example, referring to FIG10, the inner wall of the heat exchange channel 301 at both ends of the second direction Y is provided with a limiting part 302, and the two limiting parts 302 abut against the edge parts 3211 of the sealing member 321 at both ends of the second direction Y.

[0102] The limiting part 302 can also abut against the three edge parts 3211 of the sealing member 321. For example, the inner wall of the heat exchange channel 301 at both ends in the second direction Y and the inner wall at the third direction Z are provided with the limiting part 302, and the three limiting parts 302 abut against the edge parts 3211 at both ends in the second direction Y and the edge parts 3211 at the third direction Z of the sealing member 321.

[0103] The limiting part 302 can also abut against the four edge parts 3211 of the sealing member 321. For example, the inner wall of the heat exchange channel 301 at both ends of the second direction Y and the inner wall at both ends of the third direction Z are provided with the limiting part 302, and the four limiting parts 302 abut against the edge parts 3211 at both ends of the second direction Y and the edge parts 3211 at both ends of the third direction Z of the sealing member 321.

[0104] In the above technical solution, by limiting at least two opposite edge portions 3211 of the sealing member 321 by the limiting portion 302, the limiting area of ​​the sealing member 321 by the limiting portion 302 can be increased, thereby improving the limiting reliability and stability, enhancing the sealing effect of the sealing member 321 on the heat exchange channel 301, and thus improving the working reliability of the heat exchange assembly 30.

[0105] In some embodiments of this application, referring to Figures 4, 10, 11 and 12, the dimensions of the heat exchange body 31 in the first direction X and the third direction Z are larger than the dimensions in the second direction Y, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other; the limiting part 302 abuts against the edge parts 3211 at both ends of the sealing member 321 in the second direction Y.

[0106] 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 Figures 11 and 12). With this structure, the heat exchange body 31 can be a thin plate-like structure 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. 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.

[0107] Referring to the above, the surface area at both ends of the heat exchange body 31 in the second direction Y is greater than the surface area at both ends of the heat exchange body 31 in the third direction Z. That is, the surface at both ends of the heat exchange body 31 in the second direction Y is the large surface. Therefore, "the limiting part 302 abuts against the edge part 3211 at both ends of the sealing member 321 in the second direction Y" can be understood as the limiting part 302 being provided on the large surface of the heat exchange body 31, which facilitates the processing and manufacturing of the limiting part 302.

[0108] In the above technical solution, the heat exchange body 31 can be formed into a thin plate-like structure, which makes it easier to fit onto the surface of the battery cell assembly 20 for heat exchange. This helps save space inside the housing 10, provides more room for the battery cell assembly 20, increases the energy density of the battery device 100, and also provides more room for other electrical components. This facilitates the installation of internal parts of the housing 10, reduces installation difficulty, and is beneficial for maintenance and repair. Furthermore, the above solution allows the limiting part 302 to be located on the large surface of the heat exchange body 31, which reduces the manufacturing difficulty of the limiting part 302, improves its molding quality, and helps the limiting part 302 provide more reliable limiting for the sealing member 321.

[0109] In some embodiments of this application, the sealing member 321 is located at both ends in the second direction Y and abuts against the inner wall of the heat exchange channel 301.

[0110] The phrase "the sealing element 321 abuts against the inner wall of the heat exchange channel 301 at both ends in the second direction Y" can be understood as the sealing element 321 at both ends in the second direction Y and the inner wall of the heat exchange channel 301 having a transition fit or an interference fit. Referring to the above, the end face of the heat exchange body 31 in the second direction Y is usually in close contact with the battery cell 21 for heat exchange. The battery cell 21 typically has a large surface area that is in contact with the heat exchange body 31, and a portion of the heat exchange body 31 is also positioned between two adjacent battery cells 21. Therefore, the end face of the heat exchange body 31 in the second direction Y experiences significant stress. Through the transition fit or interference fit between the sealing element 321 and the inner wall of the heat exchange channel 301 at both ends in the second direction Y, the sealing element 321 can provide support within the heat exchange channel 301, reducing the likelihood of significant deformation of the heat exchange body 31.

[0111] In the above technical solution, the above structure enables the sealing component 321 to be installed more tightly in the heat exchange channel 301, improving the installation reliability of the sealing component 321 in the heat exchange channel 301 and enhancing the sealing effect. On the other hand, when the heat exchange body 31 is under stress, the sealing component 321 can play a supporting role inside the heat exchange channel 301, reducing the probability of large deformation of the heat exchange body 31 and reducing the risk of damage to the heat exchange body 31. This reduces the risk of heat exchange efficiency being affected by the reduction of the channel cross-section of the heat exchange channel 301, thereby improving the heat exchange reliability of the heat exchange body 31, providing a more stable working environment for the battery cell assembly 20, and thus improving the reliability of the battery device 100.

[0112] In some embodiments of this application, referring to Figures 14 and 15, a gap 324 is formed between at least one end of the sealing member 321 in the third direction Z and the inner wall of the heat exchange channel 301. The sealing member 321 has a circumferential surface 321a arranged around the first direction X. The circumferential surface 321a is provided with a receiving groove 321b, which is an annular structure arranged around the first direction X.

[0113] "A gap 324 is formed between at least one end of the sealing member 321 in the third direction Z and the inner wall of the heat exchange channel 301." It can be understood that a gap 324 is formed between one end of the sealing member 321 in the third direction Z and the inner wall of the heat exchange channel 301, or both ends of the sealing member 321 in the third direction Z and the inner wall of the heat exchange channel 301 (see Figure 15).

[0114] The circumferential surface 321c can refer to the circumferential surface of the sealing member 321 arranged around the first direction X.

[0115] In the above technical solution, during the process of forming the adapter 323 in the heat exchange body 31, the overflow material can enter the receiving groove 321b through the gap 324. Since the receiving groove 321b is an annular structure, the overflow material can form a seal between the circumferential surface 321c of the sealing member 321 and the inner wall of the heat exchange channel 301. On the one hand, it can improve the sealing effect of the sealing member 321 on the heat exchange channel 301. On the other hand, it can reduce the problem of overflow material entering the heat exchange channel 301 where the sealing member 321 is located, which would prevent the adapter 323 from forming well. This can improve the forming reliability of the adapter 323, thereby improving the reliability of the heat exchange assembly 30 and the battery device 100.

[0116] In some embodiments of this application, referring to Figures 6 and 16, the portion of the limiting part 302 within the corresponding heat exchange channel 301 is an elongated strip extending in the third direction Z.

[0117] In the above technical solution, the elongated structure of the limiting part 302 can further increase the limiting support surface of the sealing part 321 and further enhance the limiting effect of the limiting part 302 on the sealing part 321, thereby improving the installation reliability of the sealing part 321 in the heat exchange channel 301 and improving the sealing effect of the sealing part 321 on the heat exchange channel 301.

[0118] In some embodiments of this application, on the third direction Z, the size of the limiting part 302 inside the corresponding heat exchange channel 301 is greater than or equal to the size of the corresponding edge part 3211.

[0119] It is understandable that a gap 324 may not be formed between the sealing member 321 and the heat exchange channel 301. In this case, the size of the limiting part 302 within the corresponding heat exchange channel 301 can be equal to the size of the corresponding edge part 3211. Alternatively, a gap 324 may be formed between the sealing member 321 and the heat exchange channel 301. In this case, the size of the limiting part 302 within the corresponding heat exchange channel 301 can be larger than the size of the corresponding edge part 3211.

[0120] In the above technical solution, a sufficiently large limiting support surface can be formed between the above-mentioned structural limiting part 302 and the sealing part 321, the limiting part 302 has a better limiting effect on the sealing part 321, and the installation of the sealing part 321 in the heat exchange channel 301 is more reliable.

[0121] In some embodiments of this application, referring to FIG16, the limiting portion 302 includes a first surface 302a facing the collector 322, and the heat exchange channel 301 includes a second surface 301a located on the side of the limiting portion 302 near the collector 322, and the second surface 301a and the first surface 302a are arranged at an angle.

[0122] In the above scheme, the heat exchange body 31 can form a limiting part 302 by reducing its thickness. The first surface 302a of the limiting part 302 plays a limiting role on the sealing part 321.

[0123] The phrase "the second surface 301a and the first surface 302a are set at an angle" can be understood as follows: the second surface 301a and the first surface 302a can be perpendicular to each other, or the second surface 301a and the first surface 302a can form an acute angle, or the second surface 301a and the first surface 302a can form an obtuse angle, all of which can satisfy the limitation of the first surface 302a on the sealing member 321.

[0124] In the above technical solution, the limiting part 302 is set in the heat exchange channel 301 through the above structure. The structure is relatively simple, which can reduce the weight of the heat exchange body 31 and help improve the energy density of the battery device 100.

[0125] In some embodiments of this application, referring to Figures 10 and 17, the limiting part 302 is a protruding structure that protrudes from the inner wall surface of the heat exchange channel 301.

[0126] The heat exchanger body 31 can form a limiting part 302 inside the heat exchange channel 301 during the manufacturing process. The limiting part 302 can also be formed inside the heat exchange channel 301 by post-processing. For example, the limiting part 302 can be obtained inside the heat exchange channel 301 by injection molding, by welding, or by stamping the limiting part 302 inward from the surface of the heat exchanger body 31. No specific limitation is made here.

[0127] In the above technical solution, the above structure makes it easier to form the limiting part 302 inside the heat exchange channel 301, reducing the manufacturing difficulty of the limiting part 302, thereby improving the overall forming quality of the heat exchange body 31, improving manufacturability, and improving product yield, thereby reducing manufacturing costs.

[0128] In some embodiments of this application, referring to Figures 7, 8 and 10, a portion of the heat exchange body 31 is pressed into the interior of the heat exchange channel 301 to form a limiting portion 302, and a groove 303 is formed on the outer side of the heat exchange body 31.

[0129] In the above technical solution, the heat exchange body 31 can form a protruding limiting part 302 inside the heat exchange channel 301 by external stamping. This reduces the difficulty of forming the limiting part 302 and improves its manufacturability. Furthermore, since the limiting part 302 has a groove 303 corresponding to the outer side of the heat exchange body 31, it facilitates determining the limiting position between the limiting part 302 and the sealing member 321, thus improving their fit. The limiting part 302 formed in this way also acts as a reinforcing rib, increasing the strength of the location of the sealing member 321 within the heat exchange body 31, thereby improving the reliability of the heat exchange body 31 and ultimately enhancing heat exchange reliability.

[0130] In some embodiments of this application, referring to Figures 7 and 8, the limiting part 302 and the groove 303 are annular structures arranged circumferentially around the heat exchange body 31.

[0131] In the above technical solution, the limiting part 302 and groove 303 with the above structure can be formed inside all heat exchange channels 301 by a one-time stamping process on the outside of the heat exchange body 31. This reduces the number of forming steps for the limiting part 302 and improves manufacturing efficiency. Moreover, since the limiting part 302 is formed inside all heat exchange channels 301, each heat exchange channel 301 can be limited and matched with the sealing member 321. This allows for flexible adjustment of the number and position of the sealing members 321 as needed, which is beneficial for meeting the different heat exchange capacity requirements of the heat exchange assembly 30.

[0132] In some embodiments of this application, referring to FIG18, there are multiple limiting portions 302, which are arranged sequentially at intervals. The number of limiting portions 302 is at least equal to the number of sealing members 321, and they are located on the heat exchange body 31 at the position corresponding to the sealing member 321.

[0133] The number of limiting parts 302 can be equal to the number of heat exchange channels 301 and correspond one-to-one. That is, each heat exchange channel 301 is provided with a protruding limiting part 302. In this way, no matter which heat exchange channel 301 the sealing member 321 wants to seal, there is a corresponding limiting part 302 in the corresponding heat exchange channel 301.

[0134] The number of limiting parts 302 can also be equal to the number of sealing parts 321 and correspond one-to-one. That is to say, not all heat exchange channels 301 are provided with limiting parts 302. It can be determined in advance which heat exchange channels 301 need to be sealed, and then limiting parts 302 are provided in the corresponding heat exchange channels 301 that need to be sealed. This can reduce the waste of limiting parts 302 and save materials.

[0135] In the above technical solution, by forming multiple limiting parts 302 on the heat exchange body 31, and the multiple limiting parts 302 forming a discontinuous structure, the amount of material used in the limiting parts 302 can be reduced, which is beneficial to reduce the weight of the heat exchange body 31 and improve the energy density of the battery device 100.

[0136] In some embodiments of this application, referring to FIG19, 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.

[0137] The weldable part 3231 can refer to the part of the adapter 323 that is welded to the current collector 322.

[0138] 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.

[0139] 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.

[0140] 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.

[0141] In some embodiments of this application, referring to Figures 19 and 20, 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.

[0142] 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.

[0143] 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.

[0144] In some embodiments of this application, referring to Figures 10 and 14, the end of the sealing member 321 away from the collector 322 is provided with a guide surface 321c. The sealing member 321 has a central axis F1 arranged along the first direction X, and the distance between the guide surface 321c and the central axis F1 gradually decreases from the direction from the collector 322 to the heat exchange body 31.

[0145] The guide surface 321c allows the width of the end of the sealing member 321 facing the heat exchange body 31 to gradually decrease along the direction from the manifold 322 toward the heat exchange body 31. The guide surface 321c can be, but is not limited to, a guide ramp, a guide arc surface, or a guide step surface, etc. For example, referring to Figures 10 and 14, the guide surface 321c is a guide ramp.

[0146] In the above technical solution, the guide surface 321c can play a guiding role in the process of installing the sealing component 321 into the heat exchange channel 301, helping the sealing component 321 to be more smoothly aligned with the opening of the heat exchange channel 301. Moreover, it can allow a certain positional deviation during the installation of the sealing component 321, thereby providing a certain fault tolerance for the installation of the sealing component 321, reducing the installation difficulty of the sealing component 321 in the heat exchange channel 301, and helping to ensure that the assembly of the sealing component 321 and the heat exchange body 31 can be completed smoothly, thereby improving the assembly efficiency of the sealing component 321.

[0147] In some embodiments of this application, referring to Figures 8, 12 and 13, 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. A limiting part 302 is disposed on the shell 311.

[0148] 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.

[0149] "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.

[0150] "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.

[0151] 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.

[0152] 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.

[0153] 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.

[0154] In some embodiments of this application, referring to FIG12, 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.

[0155] In some embodiments of this application, referring to Figures 11 and 13, 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 cross-sectional plane perpendicular to the first direction X.

[0156] 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.

[0157] In some embodiments of this application, the adapter 323 is injection molded onto the heat exchange body 31.

[0158] 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.

[0159] 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.

[0160] 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.

[0161] 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.

[0162] 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.

[0163] 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.

[0164] 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.

[0165] 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.

[0166] 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.

[0167] 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.

[0168] Referring to Figures 3 to 10, 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.

[0169] 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.

[0170] The heat exchange assembly 30 includes a heat exchange body 31 and a flow collection structure 32.

[0171] 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. Here, the first direction X is the length direction of the heat exchanger body 31.

[0172] The heat exchange body 31 includes multiple heat exchange channels 301 extending along the first direction X. The heat exchange body 31 has a limiting part 302 protruding into the heat exchange channel 301. The limiting part 302 is formed on the outer side of the heat exchange body 31 by pressing it into the heat exchange channel 301, and a groove 303 is formed on the outer side of the heat exchange body 31. The limiting part 302 and the groove 303 are annular structures arranged around the first direction X. Multiple oblique ribs are provided inside the harmonica tube cold plate. A heat exchange channel 301 is formed between any two adjacent oblique ribs and between the oblique ribs and the inner wall of the harmonica tube cold plate.

[0173] 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 member 321, a connecting member 323, and a flow collector 322. The sealing member 321 seals within multiple heat exchange channels 301 and is limited and fitted with the limiting part 302, and the sealing member 321 and the inner wall of the heat exchange channel 301 are interference-fitted. The connecting member 323 is injection molded onto the heat exchange body 31 and welded to the flow collector 322. The collector 322 has a collector cavity 3221 inside. 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 inlet and outlet of the heat exchange medium so that the heat exchange medium can flow between the collector cavity 3221 and the heat exchange channel 301.

[0174] 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, is used for heat exchange with the individual battery cells; the heat exchange assembly includes: The heat exchange body includes a plurality of heat exchange channels extending along a first direction. The heat exchange body is provided with a limiting part, at least a portion of which protrudes into the heat exchange channels. 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 collector. The sealing component seals within at least one of the heat exchange channels and is limited in place by the limiting component. 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 channel to communicate. The flow collector 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 channel.

2. The battery device according to claim 1, wherein, The limiting part is located on the side of the sealing member near the heat exchange channel and abuts against the sealing member.

3. The battery device according to claim 2, wherein, The limiting portion abuts against at least two opposite edges of the sealing member.

4. The battery device according to claim 3, wherein, The dimensions of the heat exchange body in the first and third directions are greater than those in the second direction, and the first, second, and third directions are perpendicular to each other; the limiting portion abuts against the edge portions at both ends of the sealing member in the second direction.

5. The battery device according to claim 4, wherein, The sealing components are located at both ends in the second direction and abut against the inner wall of the heat exchange channel.

6. The battery device according to claim 5, wherein, The sealing member has a gap between at least one end in the third direction and the inner wall of the heat exchange channel. The sealing member has a circumferential surface surrounding the first direction, and the circumferential surface is provided with a receiving groove, which is an annular structure surrounding the first direction.

7. The battery device according to any one of claims 4 to 6, wherein, The portion of the limiting part within the corresponding heat exchange channel is an elongated strip extending in the third direction.

8. The battery device according to claim 7, wherein, In the third direction, the dimension of the limiting portion within the corresponding heat exchange channel is greater than or equal to the dimension of the corresponding edge portion.

9. The battery device according to any one of claims 1 to 8, wherein, The limiting portion includes a first surface facing the collector, and the heat exchange channel includes a second surface located on the side of the limiting portion near the collector, with the second surface and the first surface arranged at an angle.

10. The battery device according to any one of claims 1 to 9, wherein, The limiting part is a protruding structure that protrudes from the inner wall surface of the heat exchange channel.

11. The battery device according to claim 10, wherein, The limiting portion is formed by pressing a part of the heat exchange body into the interior of the heat exchange channel, and a groove is formed on the outer side of the heat exchange body.

12. The battery device according to claim 11, wherein, The limiting part and the groove are annular structures arranged circumferentially around the heat exchange body.

13. The battery device according to claim 10 or 11, wherein, There are multiple limiting parts, which are arranged sequentially at intervals. The number of the multiple limiting parts is at least equal to the number of the sealing elements, and they are located on the heat exchange body at the position corresponding to the sealing elements.

14. The battery device according to any one of claims 1 to 13, wherein, The portion of the adapter near the current collector is constructed as a weldable part, which is welded to the current collector.

15. The battery device according to any one of claims 1 to 14, wherein, The sealing member has a guide surface at one end away from the collector, and the sealing member has a central axis arranged along the first direction. The distance between the guide surface and the central axis gradually decreases from the direction from the collector to the heat exchange body.

16. The battery device according to any one of claims 1 to 15, wherein, The heat exchange body includes a shell and partitions. The shell is open at both ends in the first direction. The size of the shell in the second direction is smaller than the size of the shell in the third direction. The third direction, the second direction, and the first direction are perpendicular to each other. There are multiple partitions disposed inside the shell. The partitions are inclined relative to the second direction. Heat exchange channels are formed between the partitions and the shell wall, and between any two adjacent partitions. The limiting part is disposed on the shell.

17. The battery device according to any one of claims 1 to 16, wherein, The adapter is injection molded onto the heat exchange body.

18. The battery device according to any one of claims 1 to 17, wherein, The heat exchanger body is made of metal or non-metal; and / or, the collector is made of metal or non-metal.

19. An electrical appliance, wherein, Includes a battery device as claimed in any one of claims 1 to 18, the battery device being used to store or provide electrical energy.

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