Battery device and electric device

Abstract

A battery device (100) and an electric device. The battery device comprises: a case (10); a battery cell assembly (20) accommodated in the case; and a heat exchange assembly (30) accommodated in the case. The heat exchange assembly comprises: a heat exchange main body (31) comprising a plurality of heat exchange flow channels (301); and current collecting structures (32) arranged at two ends of the heat exchange main body, each current collecting structure comprising a blocking member (321), a current collecting member (322) and an adapter member (323), wherein the blocking member blocks at least one heat exchange flow channel, the current collecting member is provided with a current collecting cavity (3221), the current collecting member is in sealing fit with and connected to the heat exchange main body by means of the adapter member, the current collecting member is provided with a communication port (322a) communicated with the current collecting cavity, the communication port can be used for allowing the entry / exit of a heat exchange medium, and the adapter member is formed on the heat exchange main body and the current collecting member.

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. 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; and a flow collection structure disposed at both ends of the heat exchange body in the first direction. The flow collection structure includes a sealing member, a flow collector, and a connecting member. The sealing member seals within at least one heat exchange channel. The flow collector has a flow collection cavity. The flow collector is sealed and connected to the heat exchange body via the connecting member, thereby connecting the flow collection cavity and the heat exchange channels. The flow collector has a connecting port connecting the flow collection cavity, which can be used for the entry and exit of heat exchange medium, allowing the heat exchange medium to flow between the flow collection cavity and the heat exchange channels. The connecting member is formed on the heat exchange body and the flow collector.

[0007] In the above technical solution, by setting 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 collection component, and a transition component, when the heat exchange body is connected to the current collection structure, the heat exchange body, the sealing component, and the current collection component can be assembled and positioned first. Then, by forming the transition component on the heat exchange body and the current collection component, the heat exchange body and the current collection component are connected together. This allows the current collection component to be not directly connected to the heat exchange body. The transition component can easily adapt to the size, shape, or flatness requirements of the heat exchange body and the current collection component during the forming process. This reduces the installation difficulty between the heat exchange body, the current collection component, and the transition component, and also makes the connection between the three components tighter and more reliable, reducing the risk of leakage caused by unreliable connection of the heat exchange assembly, improving the overall reliability of the heat exchange assembly, and thus improving the reliability of the battery device.

[0008] In some embodiments of this application, at least one of the heat exchange body and the manifold is provided with a recess, and a portion of the adapter is formed in the recess.

[0009] In the above technical solution, the formed part of the adapter can be embedded in the recessed part, which can increase the mating surface between the adapter and the heat exchange body and / or the current collector. This makes the connection between the adapter and the heat exchange body and / or the current collector tighter, reduces the risk of loosening of the heat exchange components due to vibration, fluid impact and other factors during operation or use, helps to enhance connection stability, and also helps to improve the reliable operation of the heat exchange components, thereby improving the reliability of the battery device.

[0010] In some embodiments of this application, the recess extends and opens toward the adapter.

[0011] In the above technical solution, compared with the recessed portion of the non-annular structure, the recessed portion of the annular structure can provide all-round support for the adapter and better fix the adapter, reducing the risk of displacement of the adapter in various directions and improving the positional reliability of the adapter on the heat exchanger body and / or manifold. Adopting the above structure also allows the mating surface between the adapter and the heat exchanger body and / or manifold to be as large as possible, resulting in a tighter connection, better connection stability, and enabling the adapter to form a sealing ring-like structure after molding, reducing the risk of leakage and improving the reliability of the heat exchange assembly.

[0012] In some embodiments of this application, the recess is open toward either the heat exchanger body or the manifold.

[0013] In the above technical solution, the aforementioned structure allows the material forming the adapter to smoothly enter the recessed portion through the open area during the adapter molding process, which helps reduce the molding difficulty and improve the molding quality. Furthermore, after molding, the structure allows for a larger thickness at the transition point between the portion of the adapter located between the heat exchanger body and the manifold and the portion located within the recessed portion, thus increasing the overall strength of the adapter and improving the connection reliability between the heat exchanger body, the manifold, and the adapter.

[0014] In some embodiments of this application, the thickness of the portion of the adapter located within the recess is equal to the depth of the recess.

[0015] In the above technical solution, the surface of the adapter can be flush with the surface of the heat exchanger body and / or the manifold with the recessed portion. This facilitates a tighter, seamless connection between the adapter and the heat exchanger body, and / or between the adapter and the manifold. This tight connection helps improve the sealing performance of the heat exchange assembly and reduces the risk of leakage at the connection point. The above structure also results in a more regular appearance for the heat exchange assembly, without obvious protrusions, saving material and internal space, and facilitating the installation of other electrical components inside the enclosure.

[0016] In some embodiments of this application, the end of the manifold near the heat exchange body is open and forms an opening that communicates with the manifold cavity. A support portion is provided inside the opening, and the support portion is connected to at least two opposite ends of the opening.

[0017] In the above technical solution, during the process of the adapter being formed on the collector, the support part can support the collector within the opening, reducing the risk of the collector being deformed due to the material forming the adapter squeezing it. This can improve the reliability of the collector and thus improve the reliability of the heat exchange assembly.

[0018] In some embodiments of this application, the size of the current collector in the second direction is smaller than the size of the current collector in the third direction. The third direction, the second direction, and the first direction are perpendicular to each other, and the support is connected to the two ends of the opening located in the second direction.

[0019] In the above technical solution, the current collector has an elongated strip structure, with the second direction referring to the width direction of the opening. The support portion is located at both ends of the current collector cavity in the width direction. This design results in a smaller, stronger support portion, providing greater support strength for the current collector and contributing to improved reliability. The smaller support portion also reduces resistance to the heat exchange medium, facilitating smoother flow of the medium between the current collector cavity and the heat exchange channel, improving the heat exchange stability of the heat exchange assembly, and ultimately enhancing the reliability of the battery device.

[0020] In some embodiments of this application, the sealing member includes a sealing part and a limiting part connected together. The sealing part is disposed in the heat exchange channel, and the limiting part abuts against the end of the heat exchange body near the collector.

[0021] In the above technical solution, after the sealing part is installed in the heat exchange channel, the limiting part can stop and cooperate with the end of the heat exchange body near the collector, which can fix the position of the sealing part in the heat exchange channel. This can reduce the risk of the sealing part continuing to move into the heat exchange channel due to the action of the material forming the transfer part during the process of the transfer part being formed in the heat exchange body, thereby improving the reliability of the sealing part in the heat exchange channel and thus improving the reliability of the heat exchange assembly.

[0022] In some embodiments of this application, the shape of the limiting part matches the end of the heat exchange body near the collector, and the limiting part is provided with a clearance hole corresponding to the position of the heat exchange channel.

[0023] In the above technical solution, the shape of the limiting part matches the end of the manifold, which helps to ensure accurate alignment during installation, reduces the risk of installation errors, lowers assembly difficulty, and improves assembly efficiency. This structure also allows the limiting part and the manifold to fit tightly together, reducing the risk of displacement of the sealing part under vibration, fluid impact, or other external forces, thus improving the reliability of the heat exchange assembly. Furthermore, the limiting part, using the above design, can form a ring structure, creating a ring seal between the heat exchange body and the adapter in the circumferential direction, reducing the risk of gaps between the heat exchange body and the adapter, thereby improving sealing performance and the reliability of the heat exchange assembly.

[0024] In some embodiments of this application, the limiting part is constructed as a limiting plate, and on a reference surface perpendicular to the first direction, the orthographic projection of the edge contour of the limiting part on the reference surface is located within the orthographic projection of the flow channel wall of the heat exchange flow channel where the sealing part is provided.

[0025] In the above technical solution, the limiting part is a relatively small plate, which provides good limiting effect while reducing material usage and lowering costs. Furthermore, the small size of the limiting part facilitates the processing and manufacturing of the entire sealing component, further reducing manufacturing costs. This solution also reduces weight, thereby reducing the overall weight of the heat exchange assembly and contributing to improved energy density of the battery device.

[0026] In some embodiments of this application, the sealing member includes a sealing portion disposed within a heat exchange channel. A gap is provided between at least one side of the sealing portion in a first direction and the inner wall of the heat exchange channel. The gap is configured to accommodate overflow material forming the adapter.

[0027] In the above technical solution, the gap is configured to accommodate the overflow material forming the adapter. This reduces the likelihood of poor adhesion between the heat exchanger body and the battery cell due to surface unevenness during the adapter molding process, thus affecting heat exchange efficiency. It also reduces the likelihood of damage caused by excessive local stress due to surface unevenness, thereby improving the reliability of the heat exchange assembly. The gap between the sealing part and the inner wall of the heat exchange channel makes it easier to install the sealing part into the heat exchange channel, reducing installation difficulty. Furthermore, during the adapter molding process of the heat exchanger body, the material forming the adapter can enter the gap, providing a sealing effect between the sealing part and the heat exchange channel. This enhances the sealing effect of the sealing part on the heat exchange channel, helping to stabilize the heat exchange performance of the heat exchange assembly and improving its reliability.

[0028] In some embodiments of this application, the size of the heat exchange body in the second direction is smaller than the size of the manifold in the third direction. The third direction, the second direction, and the first direction are perpendicular to each other. The two ends of the sealing part in the second direction abut against the inner wall of the heat exchange channel. At least one end of the sealing part in the third direction is provided with a gap between it and the inner wall of the heat exchange channel.

[0029] 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, facilitating their installation, maintenance, and repair. Using this structure, while maintaining a gap between the sealing part and the inner wall of the heat exchange channel, the sealing part can provide support over a large area of ​​the heat exchanger body. This provides better support, reduces the probability of significant deformation of the heat exchanger body, and decreases the risk of damage. This also reduces the risk of reduced heat exchange efficiency due to a smaller cross-section of the heat exchange channel, improving the heat exchange reliability of the heat exchanger body, providing a more stable working environment for the battery cell assembly, and enhancing the reliability of the battery device.

[0030] In some embodiments of this application, the sealing portion has a circumferential surface arranged around a first direction, the circumferential surface is provided with a receiving groove, the receiving groove is connected to the gap, and is configured to receive overflow material forming the adapter.

[0031] In the above technical solution, the receiving groove and the gap are connected, which can be further used to receive the overflow material formed by the adapter. The receiving groove and the gap together can hold more overflow material, which can further reduce the probability of overflow material spilling onto the surface of the heat exchange body and / or current collector when forming the adapter, and further reduce the probability of poor flatness on the surface of the heat exchange body and / or current collector, thereby further improving the heat exchange effect of the heat exchange component on the battery cell assembly and improving the reliability of the battery device.

[0032] In some embodiments of this application, the receiving groove is an annular structure arranged around a first direction.

[0033] 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 part and the inner wall of the heat exchange channel. On the one hand, it can improve the sealing effect of the sealing part 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 part 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.

[0034] 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.

[0035] 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.

[0036] In some embodiments of this application, the cross-sectional shape of the heat exchange channel and the cross-sectional shape of the sealing element are the same on a section plane perpendicular to the first direction.

[0037] In the above technical solution, by having the same cross-sectional shape for the heat exchange channel and the sealing component, the sealing component and the inner wall of the heat exchange channel can fit well together. This facilitates the sealing of the sealing component within the heat exchange channel, reduces the risk of gaps, and ensures that the sealing component can bear pressure evenly in all directions within the heat exchange channel. It also helps maintain a tight seal between the sealing component and the inner wall of the heat exchange channel. Because the heat exchange channel and the sealing component have the same cross-sectional shape, the sealing component also provides support within the heat exchange channel, reducing the risk of significant deformation of the heat exchange body under stress. This helps mitigate the risk of a reduction in the flow cross-section of the heat exchange channel, thereby improving the heat exchange reliability of the heat exchange body.

[0038] In some embodiments of this application, the adapter is injection molded into the heat exchanger body and the manifold.

[0039] In the above technical solution, the adapter is injection molded onto the heat exchanger body and the current collector. This method allows for rapid molding of the adapter, facilitating mass automated production and improving production efficiency. Furthermore, this method ensures the adapter has high dimensional accuracy and surface quality, enhancing its molding quality and improving the connection reliability between the heat exchanger body, the adapter, and the current collector, thereby increasing the reliability of the battery device.

[0040] 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.

[0041] 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.

[0042] 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

[0043] 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.

[0044] Figure 1 is a schematic diagram of the structure of an electrical device provided in some embodiments of this application as a vehicle;

[0045] Figure 2 is an exploded view of the structure of a battery device provided in some embodiments of this application;

[0046] Figure 3 is a partial perspective structural diagram of a battery device provided in some embodiments of this application;

[0047] Figure 4 is a three-dimensional structural schematic diagram of the heat exchange component provided in some embodiments of this application;

[0048] Figure 5 is a partial internal structure diagram of a heat exchange component provided in some embodiments of this application;

[0049] Figure 6 is an exploded view of the flow collection structure provided in some embodiments of this application;

[0050] Figure 7 is a partial internal structure diagram of a heat exchange component provided in some embodiments of this application (II).

[0051] Figure 8 is an assembly diagram of the heat exchanger body, sealing component and adapter provided in some embodiments of this application;

[0052] Figure 9 is a three-dimensional structural diagram of the sealing component and adapter provided in some embodiments of this application;

[0053] Figure 10 is an assembly diagram of the heat exchanger body and adapter provided in some embodiments of this application;

[0054] Figure 11 is a schematic diagram of the assembly of the heat exchanger body and the sealing part provided in some embodiments of this application;

[0055] Figure 12 is a schematic diagram of the structure of the sealing component provided in some embodiments of this application;

[0056] Figure 13 is a partial internal structure diagram of the heat exchanger body 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; 3011, Channel wall; 311, Shell; 312, Partition; 32, Collector structure; 321, Sealing component; 3211, Sealing part; 3211a, Circumferential surface; 3211b, Receiving groove; 3212, Limiting part; 3212a, Clearance hole; 3212b, Edge contour; 322, Collector; 3221, Collector cavity; 3222, Support part; 322a, Connecting port; 322b, Recessed part; 322c, Opening; 323, Adapter; 324, clearance; 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 address the issue of reliability problems in the heat exchange components during installation affecting the reliability of the battery device, 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 collector structure. The heat exchange body includes multiple heat exchange channels extending along a first direction; the flow collector structure is located at both ends of the heat exchange body in the first direction, and includes a sealing element, a flow collector, and a connecting element. The sealing element seals within at least one heat exchange channel, and the flow collector has a flow collection cavity. The flow collector is sealed and connected to the heat exchange body via the connecting element, thereby connecting the flow collection cavity and the heat exchange channels. The flow collector has a connecting port connecting to the flow collection cavity, which 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; wherein, the connecting element is formed on the heat exchange body and the flow collector.

[0074] In this type of battery device, the heat exchange assembly is configured to include a heat exchange body and a current collector structure. The current collector structure includes a sealing element, a current collector, and a connector. When the heat exchange body is connected to the current collector structure, the heat exchange body, sealing element, and current collector can be assembled and positioned first. Then, by forming a connector on the heat exchange body and current collector, the heat exchange body and current collector are connected together. This allows the current collector to be not directly connected to the heat exchange body. The connector can easily adapt to the size, shape, or flatness requirements of the heat exchange body and current collector during the forming process. This reduces the installation difficulty between the heat exchange body, current collector, and connector, and also makes the connection between the three elements tighter and more reliable. This reduces the risk of leakage caused by unreliable connection of the heat exchange assembly, improves the overall reliability of the heat exchange assembly, and thus improves the reliability of 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 Figures 3 to 6, 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 flow collection structure 32 is disposed 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 flow collection member 322, and a connecting member 323. The sealing member 321 seals at least one heat exchange channel 301. The flow collection member 322 is provided with a flow collection cavity 3221. 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 inlet and outlet 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. The connecting member 323 is formed on the heat exchange body 31 and the flow collection member 322.

[0084] The enclosure 10 refers to the external structure of the battery device 100, providing physical protection for electrical 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 rows of 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 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.

[0087] It should be noted that the first direction X and the second direction Y mentioned above, as well as the third direction Z mentioned below, can refer to one of the length direction, width direction, and height direction of the heat exchange body 31, without specific limitations. For example, the first direction X can refer to the length direction of the heat exchange body 31.

[0088] 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 a 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.

[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 refers to a part that can seal the heat exchange channel 301. For ease of understanding, the sealing component 321 can refer to a plug or blockage, which is partially or completely embedded in the heat exchange channel 301 to seal it. There can be one or more sealing components 321. A certain number of sealing components 321 can be selected as needed to seal a corresponding number of heat exchange channels 301. The material of the sealing component 321 can be, but is not limited to, wood, rubber, or plastic. It is understood that by setting the sealing component 321, the heat exchange channel 301 can be sealed, thereby adjusting the flow rate of the heat exchange medium flowing through the heat exchange body 31, and thus regulating the heat exchange capacity of the heat exchange assembly 30. For example, if the number of blocked heat exchange channels 301 in the heat exchange body 31 is greater, the amount of heat exchange medium flowing through it will be less, and the overall heat exchange capacity of the heat exchange component 30 will be weakened; if the number of blocked heat exchange channels 301 in the heat exchange body 31 is less, the amount of heat exchange medium flowing through it will be more, and the overall heat exchange capacity of the heat exchange component 30 will be improved.

[0091] The manifold 322 can refer to the main structure of the manifold structure 32, which is 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, and the connecting port 322a can refer to the inlet and outlet for the heat exchange medium entering and exiting 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 alloys, copper alloys, 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 collector 322 and the heat exchanger 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 exchanger body 31 and the other end wrapped around the collector 322. The adapter 323 can also be a non-annular structure, as long as it can simultaneously connect the collector 322 and the heat exchanger body 31; no specific limitations are made here in the above technical solution. The material of the adapter 323 can include, but is not limited to, metal or plastic materials. Metal materials can include, but are not limited to, aluminum alloys, copper alloys, etc., and plastic materials can include, but are not limited to, polyethylene or polypropylene, etc.

[0093] The phrase "transfer component 323 is formed on the heat exchanger body 31 and the collector 322" can be understood as meaning that the transfer component 323 can be directly formed and manufactured on the heat exchanger body 31 and the collector 322, thereby enabling the transfer component 323, the heat exchanger body 31, and the collector 322 to be tightly integrated into a single unit, forming an integral structure. The forming method of the transfer component 323 on the heat exchanger body 31 and the collector 322 can include, but is not limited to, injection molding, 3D printing, casting, etc., without specific limitations. The "material" mentioned later can refer to the injection molding liquid, casting liquid, or 3D printing material used in the forming of the transfer component 323.

[0094] Since the heat exchanger body 31 and the current collector 322 are usually pre-manufactured electrical components with fixed dimensions or shapes, if the heat exchanger body 31 and the current collector 322 are directly connected, it is difficult to match their dimensions, shapes and surface flatness, and there is also a risk of poor fit, which affects the connection quality. In the above technical solution, the heat exchanger body 31, the sealing component 321, and the collector 322 can be assembled and positioned first. Then, the adapter 323 is directly formed on the heat exchanger body 31 and the collector 322. The adapter 323 can be manufactured according to the existing size and shape of the heat exchanger body 31. The manufacturing of the adapter 323 is relatively easy. Moreover, through the forming mold of the adapter 323, the adapter 323 can also better adapt to the existing size, shape, and surface flatness of the collector 322. This can reduce the installation difficulty between the heat exchanger body 31 and the collector 322. The heat exchanger body 31 is connected to the collector 322 through the adapter 323, which can also easily ensure a high connection quality and improve the connection reliability of the heat exchanger body 31, the adapter 323, and the collector 322.

[0095] In the above technical solution, by configuring the heat exchange assembly 30 to include a heat exchange body 31 and a flow collection structure 32, and the flow collection structure 32 including a sealing component 321, a flow collector 322, and a connecting component 323, when the heat exchange body 31 is connected to the flow collection structure 32, the heat exchange body 31, the sealing component 321, and the flow collector 322 can be assembled and positioned first. Then, by forming the connecting component 323 on the heat exchange body 31 and the flow collector 322, the heat exchange body 31 and the flow collector 322 are connected together, so that the flow collector 322 is not directly connected to the heat exchanger. The main body 31 is directly connected, and the adapter 323 can easily adapt to the size, shape or flatness requirements of the heat exchange main body 31 and the current collector 322 during the molding process. This reduces the installation difficulty between the heat exchange main body 31, the current collector 322 and the adapter 323, and makes the connection between the heat exchange main body 31, the current collector 322 and the adapter 323 tighter and more reliable. This reduces the risk of leakage caused by unreliable connection of the heat exchange assembly 30, improves the overall reliability of the heat exchange assembly 30, and thus improves the reliability of the battery device 100.

[0096] In some embodiments of this application, referring to Figures 5 to 7, at least one of the heat exchange body 31 and the collector 322 is provided with a recess 322b, and a portion of the adapter 323 is formed in the recess 322b.

[0097] The recess 322b can refer to a recessed area formed on the heat exchanger body 31 and / or the manifold 322. The recess 322b can be a continuous structure, for example, the recess 322b is a strip groove (see Figure 6). The recess 322b can also be a discontinuous structure, which can include multiple grooves spaced apart along the third direction Z, wherein the shape of each groove can be, but is not limited to, circular, rectangular, etc.

[0098] In the above scheme, the recess 322b can be provided only on the heat exchange body 31 or only on the manifold 322. The recess 322b can also be provided on both the heat exchange body 31 and the manifold 322. For example, referring to Figures 5 to 7, the recess 322b is provided on the manifold 322.

[0099] In the above technical solution, the formed portion of the adapter 323 can be embedded in the recessed portion 322b, which can increase the mating surface between the adapter 323 and the heat exchange body 31 and / or the current collector 322. This makes the connection between the adapter 323 and the heat exchange body 31 and / or the current collector 322 tighter, reducing the risk of the heat exchange assembly 30 loosening due to vibration, fluid impact and other factors during operation or use. This is beneficial to enhancing connection stability and improving the reliable operation of the heat exchange assembly 30, thereby improving the reliability of the battery device 100.

[0100] In some embodiments of this application, referring to FIG6, the recess 322b is an annular structure arranged around the first direction X.

[0101] In the above technical solution, compared with the non-annular recess 322b, the annular recess 322b can provide all-round support for the adapter 323 and better fix the adapter 323, reducing the risk of displacement of the adapter 323 in various directions and improving the positional reliability of the adapter 323 on the heat exchange body 31 and / or the collector 322. The above structure also allows for a larger mating surface between the adapter 323 and the heat exchange body 31 and / or the collector 322, resulting in a tighter connection, better connection stability, and a sealing ring-like structure formed after the adapter 323 is molded, reducing leakage risk and improving the reliability of the heat exchange assembly 30.

[0102] In some embodiments of this application, referring to FIG6, the recess 322b extends and opens toward the adapter 323. It can be understood that the recess 322b is a stepped groove formed at the end of the heat exchange body 31 and / or the collector 322, which has a simple structure and is easy to process and manufacture.

[0103] In the above technical solution, the above structure allows the material forming the adapter 323 to smoothly enter the recessed portion 322b through the open position during the molding process, which helps reduce the molding difficulty of the adapter 323 and improve the molding quality. Furthermore, after molding, the above structure also allows for a larger thickness at the transition point between the portion of the adapter 323 located between the heat exchanger body 31 and the collector 322 and the portion located within the recessed portion 322b, thereby increasing the overall strength of the adapter 323 and improving the connection reliability among the heat exchanger body 31, the collector 322, and the adapter 323.

[0104] In some embodiments of this application, referring to Figures 5 and 7, the thickness of the portion of the adapter 323 located within the recess 322b is equal to the depth of the recess 322b.

[0105] When the recess 322b is provided on the heat exchange body 31, the surface of the adapter 323 is flush with the surface of the heat exchange body 31. When the recess 322b is provided on the collector 322, the surface of the adapter 323 is flush with the surface of the collector 322. When the recess 322b is provided on both the heat exchange body 31 and the collector 322, the surface of the adapter 323 remains flush with both the surfaces of the heat exchange body 31 and the collector 322.

[0106] In the above technical solution, the surface of the adapter 323 can be flush with the surface of the heat exchange body 31 and / or the collector 322 where the recess 322b is provided. This facilitates a tighter and more seamless connection between the adapter 323 and the heat exchange body 31, and / or a tighter and more seamless connection between the adapter 323 and the collector 322. This tight connection helps improve the sealing performance of the heat exchange assembly 30 and reduces the risk of leakage at the connection point. The above structure also makes the appearance of the heat exchange assembly 30 more regular, without obvious protrusions, saving materials and internal space of the housing 10, and facilitating the installation of other electrical components inside the housing 10.

[0107] In some embodiments of this application, referring to Figures 5 and 6, the end of the collector 322 near the heat exchange body 31 is open and forms an opening 322c that communicates with the collector cavity 3221. A support portion 3222 is provided in the opening 322c, and the support portion 3222 is connected to at least two opposite ends of the opening 322c.

[0108] The support portion 3222 can refer to a component or structure that provides support. For example, the support portion 3222 can refer to a support rib or a support block. "The support portion 3222 is connected to at least two opposite ends of the opening 322c" can be understood as the support portion 3222 connecting to the cavity walls of the flow collecting cavity 3221 at both ends in the second direction Y, or connecting to the cavity walls of the flow collecting cavity 3221 at both ends in the third direction Z, or connecting to both ends in the second direction Y and the third direction Z. No specific limitation is made here.

[0109] In the above technical solution, the opening 322c formed by the above structure has a relatively large size, which makes the flow of heat exchange medium between the collection cavity 3221 and the multiple heat exchange channels 301 smoother, which is conducive to improving heat exchange efficiency. During the process of the adapter 323 being formed on the collector 322, the support part 3222 can support the collector 322 within the opening 322c, reducing the risk of deformation of the collector 322 due to the material forming the adapter 323 squeezing it. This can improve the reliability of the collector 322, and thus improve the reliability of the heat exchange assembly 30.

[0110] In some embodiments of this application, referring to FIG6, the size of the current collector 322 in the second direction Y is smaller than the size of the current collector 322 in the third direction Z. The third direction Z, the second direction Y and the first direction X are perpendicular to each other, and the support portion 3222 is connected to the two ends of the opening 322c located in the second direction Y.

[0111] In the above technical solution, the current collector 322 has an elongated strip structure, and the second direction Y can refer to the width direction of the opening 322c. Thus, the support portion 3222 is supported at both ends of the current collector cavity 3221 in the width direction. This design results in a smaller size and higher strength for the support portion 3222, providing greater support strength for the current collector 322 and contributing to further improving its reliability. The smaller size of the support portion 3222 also reduces resistance to the heat exchange medium, facilitating smoother flow of the heat exchange medium between the current collector cavity 3221 and the heat exchange channel 301, improving the heat exchange stability of the heat exchange assembly 30, and consequently improving the reliability of the battery device 100.

[0112] In some embodiments of this application, referring to Figures 5 to 7, the sealing member 321 includes a sealing part 3211 and a limiting part 3212 connected together. The sealing part 3211 is disposed in the heat exchange channel 301, and the limiting part 3212 abuts against the end of the heat exchange body 31 near the collector 322.

[0113] The sealing part 3211 can refer to the main structure of the sealing member 321, and it matches the shape of the heat exchange channel 301. There can be one or more sealing parts 3211. Multiple sealing parts 3211 can seal adjacent heat exchange channels 301 or non-adjacent heat exchange channels 301. For example, referring to Figure 6, there can be four sealing parts 3211, arranged sequentially along the third direction Z. The first and second sealing parts 3211 can seal adjacent heat exchange channels 301, and the third and fourth sealing parts 3211 can also seal adjacent heat exchange channels 301, but the second and third sealing parts 3211 seal non-adjacent heat exchange channels 301.

[0114] The limiting part 3212 can refer to a structure that protrudes relative to the blocking part 3211 and serves to limit movement. For example, the limiting part 3212 can be, but is not limited to, a limiting stop, a limiting protrusion, a limiting plate, etc.

[0115] In the above technical solution, after the sealing part 3211 is installed into the heat exchange channel 301, the limiting part 3212 can stop and cooperate with the end of the heat exchange body 31 near the collector 322, which can fix the position of the sealing part 3211 in the heat exchange channel 301. Thus, during the process of the adapter 323 being formed in the heat exchange body 31, the risk of the sealing part 3211 continuing to move into the heat exchange channel 301 due to the action of the material forming the adapter 323 can be reduced, which can improve the reliability of the sealing part 3211 in the heat exchange channel 301, and thus improve the reliability of the heat exchange assembly 30.

[0116] In some embodiments of this application, referring to FIG6, the shape of the limiting part 3212 matches the end of the heat exchange body 31 near the collector 322, and the limiting part 3212 is provided with a clearance hole 3212a corresponding to the position of the heat exchange channel 301.

[0117] For ease of understanding, exemplarily, the limiting part 3212 can be a limiting retaining ring, which mutually abuts against the circumferential shell wall of the heat exchange body 31. The clearance hole 3212a allows the heat exchange channel 301, which does not need to be sealed, to communicate normally with the collection cavity 3221. The number of clearance holes 3212a can be equal to the number of heat exchange channels 301 that do not need to be sealed, and they correspond one-to-one. The shape of the clearance hole 3212a can match the shape of the heat exchange channel 301. The number of clearance holes 3212a can also be less than the number of heat exchange channels 301 that do not need to be sealed; for example, one clearance hole 3212a can correspond to multiple heat exchange channels 301.

[0118] In the above technical solution, the shape of the limiting part 3212 matches the end of the collector 322, which helps to ensure accurate alignment of the two during installation, reduces the risk of installation errors, lowers assembly difficulty, and improves assembly efficiency. The above structure also allows the limiting part 3212 and the collector 322 to fit tightly together, reducing the risk of displacement of the sealing part 3211 under vibration, fluid impact, or other external forces, thus improving the reliability of the heat exchange assembly 30. Furthermore, the limiting part 3212, using the above design, can form a ring structure, creating a ring seal between the heat exchange body 31 and the adapter 323 in the circumferential direction, reducing the risk of gaps between the heat exchange body 31 and the adapter 323, thereby improving sealing performance and the reliability of the heat exchange assembly 30.

[0119] In some embodiments of this application, referring to Figures 8 to 10, the limiting part 3212 is constructed as a limiting plate. On a reference plane perpendicular to the first direction X, the orthographic projection of the edge contour 3212b of the limiting part 3212 on the reference plane is located within the orthographic projection of the flow channel wall 3011 of the heat exchange flow channel 301 where the sealing part 3211 is provided.

[0120] A limit plate can refer to a flat plate-shaped component.

[0121] "The edge contour 3212b of the limiting part 3212" can refer to the annular contour line of the limiting part 3212 arranged around the first direction X (see Figure 9).

[0122] "The flow channel wall 3011 of the heat exchange flow channel 301" can refer to the wall plate that forms the heat exchange flow channel 301. For example, referring to FIG10, each heat exchange flow channel 301 may include flow channel walls 3011 located at both ends in the second direction Y, and flow channel walls 3011 located at both ends in the third direction Z.

[0123] "The orthographic projection of the edge contour 3212b of the limiting part 3212 onto the reference plane is located within the orthographic projection of the flow channel wall 3011 of the heat exchange flow channel 301 where the sealing part 3211 is provided." It can be understood that the edge contour 3212b of the limiting part 3212 does not extend beyond the outermost edge of the flow channel wall 3011 of the heat exchange flow channel 301 to be sealed, thereby not obstructing the heat exchange flow channel 301 that does not need to be sealed. This is beneficial for the limiting part 3212 to have a smaller size.

[0124] In the above scheme, there can be multiple blocking parts 3211. Multiple blocking parts 3211 can block adjacent heat exchange channels 301 or non-adjacent heat exchange channels 301, without specific limitations. For example, referring to Figures 8 to 10, there are two blocking parts 3211, which block two adjacent heat exchange channels 301 and are connected to the same limiting plate. The edge contour of the limiting plate is located within the contour of the channel wall 3011 of the two heat exchange channels 301 to be blocked.

[0125] In the above technical solution, the limiting part 3212 is a relatively small plate, which can reduce material usage and lower costs while providing good limiting function. Moreover, the small size of the limiting part 3212 also facilitates the processing and manufacturing of the entire sealing part 321, thereby reducing manufacturing costs. The above solution can also reduce weight, thereby reducing the overall weight of the heat exchange assembly 30, which is beneficial to improving the energy density of the battery device 100.

[0126] In some embodiments of this application, referring to FIG11, the sealing member 321 includes a sealing portion 3211, which is disposed in the heat exchange channel 301. A gap 324 is provided between the sealing portion 3211 and the inner wall of the heat exchange channel 301 on at least one side in the first direction X. The gap 324 is configured to accommodate the overflow material forming the adapter 323.

[0127] "The sealing part 3211 is located on at least one side in the first direction X and has a gap 324 between it and the inner wall of the heat exchange channel 301". This can be understood as the sealing part 3211 having a gap 324 between one or both ends in the second direction Y and the inner wall of the heat exchange channel 301, or the sealing part 3211 having a gap 324 between one or both ends in the third direction Z and the inner wall of the heat exchange channel 301.

[0128] "Gap 324 is configured to accommodate overflow material forming the adapter 323." It can be understood that when the adapter 323 is formed on the heat exchanger body 31 and the manifold 322 by injection molding or casting, the material forming the adapter 323 is injection molding liquid or casting liquid, both of which are liquids. During the molding process of the adapter 323, the liquid material is prone to overflow problems due to its fluidity. By adopting the above solution, gap 324 can play the role of accommodating some overflow material, reducing the risk of the material forming the adapter 323 overflowing onto the surface of the heat exchanger body 31.

[0129] In the above technical solution, the gap 324 is configured to accommodate the overflow material forming the adapter 323. During the forming process of the adapter 323, the probability that the heat exchange body 31 cannot fit well with the battery cell 21 due to uneven surface can be reduced, thus affecting the heat exchange efficiency. It can also reduce the probability that the heat exchange body 31 will be damaged due to large local stress caused by uneven surface, thereby improving the reliability of the heat exchange assembly 30. A gap 324 is provided between the sealing part 3211 and the inner wall of the heat exchange channel 301, which makes it easier to install the sealing part 3211 into the heat exchange channel 301 and reduces the installation difficulty. On this basis, during the process of forming the adapter 323 in the heat exchange body 31, the material forming the adapter 323 can enter the gap 324, which can play a sealing role between the sealing part 3211 and the heat exchange channel 301, improve the sealing effect of the sealing part 3211 on the heat exchange channel 301, and help to keep the heat exchange performance of the heat exchange assembly 30 in a stable state and improve the reliability of the heat exchange assembly 30.

[0130] In some embodiments of this application, referring to Figures 11 and 13, the size of the heat exchange body 31 in the second direction Y is smaller than the size of the collector 322 in the third direction Z. The third direction Z, the second direction Y, and the first direction X are perpendicular to each other. The two ends of the sealing part 3211 located in the second direction Y abut against the inner wall of the heat exchange channel 301. At least one end of the sealing part 3211 located in the third direction Z is provided with a gap 324 between it and the inner wall of the heat exchange channel 301.

[0131] 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 13). The heat exchange body 31 with this structure 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.

[0132] Referring to the above, the end face of the heat exchange body 31 located in the second direction Y is usually in close contact with the battery cell 21 for heat exchange. The battery cell 21 usually has a large surface area that is in contact with the heat exchange body 31. Part of the heat exchange body 31 is also located between two adjacent battery cells 21. As a result, the end face of the heat exchange body 31 located in the second direction Y is subjected to greater force. By using the sealing part 3211 to transition fit or interference fit with the inner wall of the heat exchange channel 301 at both ends along the second direction Y, the sealing part 3211 can play a supporting role in the heat exchange channel 301, reducing the probability of the heat exchange body 31 undergoing large deformation.

[0133] The two ends of the sealing part 3211 located in the second direction Y can be transitionally fitted or interference-fitted with the inner wall of the heat exchange channel 301, thereby making the installation of the sealing part 321 in the heat exchange channel 301 more secure.

[0134] "A gap 324 is provided between at least one end of the sealing part 3211 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 part 3211 in the third direction Z and the inner wall of the heat exchange channel 301, or both ends of the sealing part 3211 in the third direction Z and the inner wall of the heat exchange channel 301.

[0135] 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, providing more room for the battery cell assembly 20, increasing the energy density of the battery device 100, and also providing more room for other electrical components. This facilitates the installation of electrical components inside the housing 10, reduces installation difficulty, and is beneficial for maintenance and repair. With this structure, while ensuring a gap 324 between the sealing part 3211 and the inner wall of the heat exchange channel 301, the sealing part 3211 can provide support over a large area of ​​the heat exchange body 31, providing better support. When the heat exchange body 31 is under stress, it reduces the probability of large deformation and the risk of damage. This reduces the risk of reduced heat exchange efficiency due to a smaller cross-section of the heat exchange channel 301, improving the heat exchange reliability of the heat exchange body 31, providing a more stable working environment for the battery cell assembly 20, and ultimately improving the reliability of the battery device 100.

[0136] In some embodiments of this application, referring to FIG12, the sealing portion 3211 has a circumferential surface 3211a disposed around a first direction X, the circumferential surface 3211a is provided with a receiving groove 3211b, the receiving groove 3211b communicates with the gap 324 and is configured to receive the overflow material forming the adapter 323.

[0137] The circumferential surface 3211a can refer to the circumferential surface of the sealing part 3211 arranged around the first direction X.

[0138] The receiving groove 3211b may refer to the recessed area provided at the location of the circumferential surface 3211a of the sealing part 3211.

[0139] In the above technical solution, the receiving groove 3211b is connected to the gap 324, which can be further used to receive the overflow material forming the adapter 323. The receiving groove 3211b and the gap 324 can together hold more overflow material, which can further reduce the probability of overflow material overflowing onto the surface of the heat exchange body 31 and / or the current collector 322 when forming the adapter 323, and further reduce the probability of poor flatness on the surface of the heat exchange body 31 and / or the current collector 322, thereby further improving the heat exchange effect of the heat exchange component 30 on the battery cell assembly 20 and improving the reliability of the battery device 100.

[0140] In some embodiments of this application, the receiving groove 3211b is an annular structure arranged around the first direction X.

[0141] 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 3211b through the gap 324. Since the receiving groove 3211b is an annular structure, the overflow material can form a seal between the circumferential surface 3211a of the sealing part 3211 and the inner wall of the heat exchange channel 301. On the one hand, it can improve the sealing effect of the sealing part 3211 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 part 3211 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.

[0142] In some embodiments of this application, referring to Figures 11 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.

[0143] 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.

[0144] "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.

[0145] "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.

[0146] 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.

[0147] 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.

[0148] In some embodiments of this application, the cross-sectional shape of the heat exchange channel 301 and the cross-sectional shape of the sealing member 321 are the same on a section plane perpendicular to the first direction X.

[0149] 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.

[0150] In some embodiments of this application, the adapter 323 is injection molded onto the heat exchange body 31 and the manifold 322.

[0151] It is understandable that the adapter 323 can be manufactured by injection molding of the heat exchange body 31. Injection molding here can be, but is not limited to, overmolding. Specifically, the sealing component 321 is first installed into the heat exchange channel 301 that needs to be sealed. Then, the manifold 322 and the heat exchange body 31 are assembled and positioned. The mold required for injection molding the adapter 323 is set on the outside of the manifold 322 and the heat exchange body 31. 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 manifold 322 and the heat exchange body 31, and is not easy to detach.

[0152] In the above technical solution, the adapter 323 is injection molded onto the heat exchanger body 31 and the current collector 322. The molding speed of the adapter 323 is relatively fast, which is easy for mass automated production and can improve production efficiency. This method also enables the adapter 323 to have high dimensional accuracy and high surface quality, which can improve the molding quality of the adapter 323, improve the connection reliability between the heat exchanger body 31, the adapter 323 and the current collector 322, and thus improve the reliability of the battery device 100.

[0153] 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.

[0154] 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.

[0155] It should be noted that, 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.

[0156] 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 are available, offering greater flexibility.

[0157] 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.

[0158] 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.

[0159] Example 1

[0160] Referring to Figures 3 to 7, 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.

[0161] The battery cell assembly 20 is housed inside the housing 10.

[0162] The heat exchange assembly 30 is housed inside 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.

[0163] The heat exchange body 31 is a harmonica tube cold plate and includes multiple heat exchange channels 301 extending along the first direction X. Multiple inclined ribs are provided inside the harmonica tube cold plate. Heat exchange channels 301 are formed between any two adjacent inclined ribs and between the inclined ribs and the inner wall of the harmonica tube cold plate.

[0164] The flow collection structure 32 is located at both ends of the heat exchange body 31 in the first direction X. The flow collection structure 32 includes a sealing component 321, a flow collection component 322 and a connecting component 323.

[0165] The sealing member 321 includes a sealing part 3211 and a limiting part 3212 connected together. The limiting part 3212 matches the shape of the end of the heat exchange body 31 near the collector 322 and abuts against the end of the heat exchange body 31 near the collector 322. The limiting part 3212 is provided with a clearance hole 3212a at the position of the heat exchange channel 301 that does not need to be sealed. There are multiple sealing parts 3211, which are provided in the corresponding heat exchange channel 301.

[0166] The collector 322 is provided with a collector cavity 3221. The collector 322 is sealed and connected to the heat exchange body 31 through a connector 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.

[0167] The adapter 323 is an annular structure arranged around the first direction X, and is injection molded onto the heat exchange body 31 and the collector 322. The collector 322 has a recess 322b arranged around the first direction X. The recess 322b extends and opens towards the adapter 323, and a portion of the adapter 323 is formed in the recess 322b.

[0168] Example 2

[0169] Referring to Figures 3, 4, 8 to 10, the structure of the battery device 100 in Embodiment 2 is largely the same as that of the battery device 100 in Embodiment 1, except that:

[0170] The limiting part 3212 is constructed as a limiting plate, and there are two blocking parts 3211, which block two adjacent heat exchange channels 301. The two blocking parts 3211 are provided on the same limiting part 3212. On a reference plane perpendicular to the first direction X, the orthographic projection of the edge contour 3212b of the limiting part 3212 on the reference plane is located within the orthographic projection of the channel wall 3011 of the two heat exchange channels 301 on which the blocking parts 3211 are provided.

[0171] 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 exchanger body includes multiple heat exchange channels extending along a first direction; A flow collection structure is provided at both ends of the heat exchange body in the first direction. The flow collection structure includes a sealing element, a flow collecting element, and a connecting element. The sealing element seals within at least one of the heat exchange channels. The flow collecting element has a flow collecting cavity. The flow collecting element is sealed and connected to the heat exchange body through the connecting element, so that the flow collecting cavity and the heat exchange channel are connected. The flow collecting element has a connecting port that connects to the flow collecting cavity. The connecting port can be used for the inlet and outlet of the heat exchange medium, so that the heat exchange medium can flow between the flow collecting cavity and the heat exchange channel. The connecting element is formed on the heat exchange body and the flow collecting element.

2. The battery device according to claim 1, wherein, At least one of the heat exchange body and the collector is provided with a recess, and a portion of the adapter is formed in the recess.

3. The battery device according to claim 2, wherein, The recessed portion is a ring structure arranged around the first direction.

4. The battery device according to claim 3, wherein, The recessed portion extends and opens toward the adapter.

5. The battery device according to claim 4, wherein, The thickness of the portion of the adapter located within the recess is equal to the depth of the recess.

6. The battery device according to any one of claims 1 to 5, wherein, The end of the manifold near the heat exchange body is open and forms an opening that communicates with the manifold cavity. A support portion is provided inside the opening, and the support portion is connected to at least two opposite ends of the opening.

7. The battery device according to claim 6, wherein, The size of the current collector in the second direction is smaller than the size of the current collector in the third direction. The third direction, the second direction, and the first direction are perpendicular to each other. The support is connected to the two ends of the opening located in the second direction.

8. The battery device according to any one of claims 1 to 7, wherein, The sealing component includes a sealing part and a limiting part connected together. The sealing part is disposed in the heat exchange channel, and the limiting part abuts against the end of the heat exchange body near the collector.

9. The battery device according to claim 8, wherein, The limiting part is shaped to match the end of the heat exchange body near the collector, and the limiting part is provided with a clearance hole corresponding to the position of the heat exchange channel.

10. The battery device according to claim 8, wherein, The limiting part is constructed as a limiting plate. On a reference surface perpendicular to the first direction, the edge contour of the limiting part is projected onto the reference surface within the projection of the flow channel wall of the heat exchange flow channel where the sealing part is located.

11. The battery device according to any one of claims 1 to 10, wherein, The sealing component includes a sealing portion disposed within the heat exchange channel. A gap is provided between the sealing portion and the inner wall of the heat exchange channel on at least one side in the first direction. The gap is configured to accommodate overflow material forming the adapter.

12. The battery device according to claim 11, wherein, The size of the heat exchanger body in the second direction is smaller than the size of the manifold in the third direction. The third direction, the second direction, and the first direction are perpendicular to each other. The two ends of the sealing part in the second direction abut against the inner wall of the heat exchange channel. At least one end of the sealing part in the third direction is provided with a gap between it and the inner wall of the heat exchange channel.

13. The battery device according to claim 11 or 12, wherein, The sealing portion has a circumferential surface arranged around the first direction, the circumferential surface is provided with a receiving groove, the receiving groove communicates with the gap and is configured to receive the overflow material forming the adapter.

14. The battery device according to claim 13, wherein, The receiving groove is a ring structure arranged around the first direction.

15. The battery device according to any one of claims 1 to 14, 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.

16. The battery device according to claim 15, wherein, On a cross-section perpendicular to the first direction, the cross-sectional shape of the heat exchange channel is the same as that of the sealing element.

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

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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