Battery device, electric equipment and energy storage equipment

Abstract

The utility model provides a battery device, electric equipment and energy storage equipment, and belongs to the technical field of batteries, the battery device comprises a box body, single batteries and a heat exchange assembly, the box body comprises wall plates, and the wall plates surround to form a containing cavity; the battery monomers are arranged in the accommodating cavities; the heat exchange assembly is positioned between the battery monomers and the wall plate and is used for carrying out heat exchange with the battery monomers; the heat exchange assembly comprises a first pipe section and a second pipe section which are connected, the first pipe section comprises an inlet allowing a heat exchange medium to flow in, and the second pipe section comprises an outlet allowing the heat exchange medium to flow out; the first pipe section and the second pipe section are each of a multi-circle spiral structure, and at least part of the second pipe section is located between two adjacent circles of the first pipe section. By adopting the design of the multi-circle spiral structure, the heat exchange contact area of the battery monomers can be increased, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device, an electrical device, and an energy storage device. Background Art

[0002] Energy conservation and emission reduction are key to sustainable social development. Rechargeable batteries, with their ability to store and release energy as needed, are widely used in various electrical devices and energy storage devices, playing a crucial role in promoting energy transformation and sustainable development. Battery technology is a crucial factor in the development of the new energy industry.

[0003] The battery device includes a heat exchange component, and the battery cells need to use the heat exchange component to exchange heat during use. In some embodiments, the heat exchange efficiency of the heat exchange component is low, which reduces the performance of the battery cells and also affects the service life of the battery cells. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems in the background art. To this end, one object of the present application is to provide a battery device, an electrical device, and an energy storage device to increase the heat exchange contact area and improve the heat exchange efficiency of the battery cells.

[0005] An embodiment of the first aspect of the present application provides a battery device. The battery device includes a housing, a battery cell, and a heat exchange assembly. The housing includes a wall panel that surrounds a housing cavity. The battery cell is disposed within the housing cavity. The heat exchange assembly is located between the battery cell and the wall panel and is configured to exchange heat with the battery cell. The heat exchange assembly includes a first pipe segment and a second pipe segment connected to each other. The first pipe segment includes an inlet for allowing a heat exchange medium to flow in, and the second pipe segment includes an outlet for allowing the heat exchange medium to flow out. The first pipe segment and the second pipe segment each have a multi-turn spiral structure, and at least a portion of the second pipe segment is located between two adjacent turns of the first pipe segment.

[0006] In the technical solution of the embodiment of the present application, by adopting a multi-turn spiral structure and a cross-arranged design for the first pipe section and the second pipe section, the gap between the pipes in the heat exchange component can be reduced, the contact area between the heat exchange component and the battery cell can be increased, the heat exchange efficiency of the battery cell can be improved, and it helps to fully exert the performance of the battery cell.

[0007] In some embodiments, the first and second tube segments are configured to extend helically around a common rotation center and are alternately arranged radially outward from the rotation center. By extending the first and second tube segments helically around the common rotation center and nesting them with their innermost turns as the starting point, space waste between adjacent turns of the first and second tube segments and between adjacent turns of the second tube segment is further reduced, increasing the contact area between the first and second tube segments and the battery cells, thereby improving the heat exchange efficiency of the battery cells.

[0008] In some embodiments, the first and second pipe sections are both continuous and smoothly transitioned spiral bends. This continuous and smoothly transitioned spiral bend design can reduce resistance to the flow of the heat exchange medium, mitigate turbulence caused by sudden changes in the flow channel tube shape, reduce the generation of bubbles, and improve heat exchange efficiency.

[0009] In some embodiments, the first tube segment includes alternating first straight segments and first curved segments, and the second tube segment includes alternating second straight segments and second curved segments, with at least a portion of the first straight segments adjacent to and arranged side by side with the second straight segments, and at least a portion of the first curved segments adjacent to and arranged side by side with the second curved segments. By employing a flow channel format with alternating straight segments and curved segments, and arranging flow channel tubes of the same structural type adjacent to and side by side, the gap between the first and second tube segments can be reduced, thereby increasing the contact area between the first and second tube segments and the battery cells.

[0010] In some embodiments, the end of the innermost first straight segment of the first pipe segment is connected to the end of the innermost second straight segment of the second pipe segment; the first straight segment located in the innermost circle and the second straight segment located in the innermost circle extend in the same direction. Connecting the ends of the straight segments helps reduce flow resistance, minimizes pressure head loss, and helps accelerate heat exchange.

[0011] In some embodiments, the sidewall of the innermost first straight segment of the first tube segment is connected to the sidewall of the innermost second straight segment of the second tube segment; the innermost first straight segment and the innermost second straight segment are parallel and arranged adjacently. By connecting the straight segments using their sidewalls, the innermost first straight segment and the innermost second straight segment fill the gap left by the tube bending process, thereby increasing the contact area between the first and second tube segments and the battery cells.

[0012] In some embodiments, a raised portion is provided on the side of the wall panel facing the heat exchange assembly, with the orthographic projection of the raised portion on the wall panel offset from the orthographic projection of the heat exchange assembly on the wall panel. By employing the raised portion's structural design and utilizing it to positionally secure the first and second pipe segments, the stability of their installation can be improved. Furthermore, the raised portion fills the empty space, reducing the amount of adhesive used and lowering production costs.

[0013] In some embodiments, there are multiple protrusions, and at least one protrusion is located in the gap between the first pipe segment and the second pipe segment. By disposing the protrusion in the gap between the first pipe segment and the second pipe segment, the first pipe segment and the second pipe segment are fixed in position, thereby improving the stability of the installation of the first pipe segment and the second pipe segment.

[0014] In some embodiments, the first pipe segment includes a first bend segment, the second pipe segment includes a second bend segment adjacent to and arranged side by side with the first bend segment, and at least one raised portion is located in the gap between the adjacent first and second bend segments. By positioning the raised portion in the gap between the first and second bend segments, the first and second pipe segments are positioned and fixed, thereby improving the stability of the installation of the first and second pipe segments, reducing the amount of adhesive used, and lowering production costs.

[0015] In some embodiments, adhesive is provided between the wall panels and the battery cells. The adhesive fills the gaps in the heat exchange assembly to bond the battery cells, heat exchange assembly, and wall panels. Leveraging the adhesive strength, the battery cells, heat exchange assembly, and wall panels are securely connected, preventing them from easily moving and improving the stability of the connections within the enclosure. Furthermore, the adhesive connection method is simple and convenient to operate, reducing assembly difficulty and improving efficiency.

[0016] In some embodiments, the raised portion is integrally formed by stamping the wall panel. This reduces manufacturing steps and time, improving production efficiency and reducing costs. Furthermore, the integrally formed raised portion and wall panel provide a more stable overall structure, facilitating positional fixation of the first and second pipe segments.

[0017] In some embodiments, the first and second pipe segments are both flat-mouthed pipes. By adopting a flat-mouthed pipe structure, the contact area between the first and second pipe segments and the battery cells can be increased, further improving the heat exchange efficiency of the battery cells.

[0018] In some embodiments, the first pipe segment is a first flow tube including a first inlet and a first outlet, and the second pipe segment is a second flow tube including a second inlet and a second outlet. The inlet for allowing the heat exchange medium to flow in is located at the first inlet of the first flow tube, and the outlet for allowing the heat exchange medium to flow out is located at the second outlet of the second flow tube. The first outlet of the first flow tube is connected to the second inlet of the second flow tube. By independently manufacturing the first and second pipe segments into multi-turn spiral structures and subsequently connecting them through assembly, the manufacturing process can be simplified compared to a manufacturing process in which the first and second pipe segments are integrally formed, thereby helping to reduce manufacturing costs.

[0019] In some embodiments, the connection between the first outlet and the second inlet includes one or more of welding, threading, and bonding. The direct connection reduces the number of components and facilitates the installation and arrangement of the first and second pipe segments. Multiple connection methods are provided to facilitate selection of the appropriate connection method based on actual conditions, meeting the connection requirements of different scenarios.

[0020] In some embodiments, the heat exchange assembly further includes a connector connecting the first outlet and the second inlet; wherein the first outlet and the second inlet are each connected to the connector by welding, clamping, threading, or bonding. By using the connector, there is no need to distinguish between the first pipe segment and the second pipe segment, which facilitates mass production of components, increases production speed, and reduces production costs. Furthermore, the connector facilitates the installation and connection of the first pipe segment and the second pipe segment, thereby improving assembly efficiency.

[0021] In some embodiments, the first pipe section includes a plurality of first sub-channels, and the second pipe section includes a plurality of second sub-channels. The plurality of first sub-channels and the plurality of second sub-channels are identical in number and connected in a one-to-one correspondence. The use of multiple sub-channels increases the contact area between the heat exchange medium and the channel walls, facilitating heat transfer and thereby improving heat exchange efficiency. Furthermore, the multiple sub-channels enhance the uniformity of the heat exchange medium distribution, allowing for even heat transfer and further improving heat exchange efficiency.

[0022] In some embodiments, the wall panel is the bottom panel or the top panel of the box. By using the wall panel as the bottom panel or the top panel of the box, the first and second pipe segments can exchange heat with the top or bottom of the battery cells, providing heat exchange arrangements at different locations, facilitating selection of appropriate heat exchange locations based on actual conditions, and meeting the requirements for heat exchange structure layout in different scenarios.

[0023] An embodiment of the second aspect of the present application provides an electrical device, which includes the battery device in the above embodiment, and the battery device is used to provide electrical energy.

[0024] An embodiment of the third aspect of the present application provides an energy storage device, which includes the battery device in the above embodiment, and the energy storage device is used to store electrical energy.

[0025] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0027] Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0028] Figure 2 A schematic diagram of the exploded structure of a battery device provided in some embodiments of the present application;

[0029] Figure 3 A schematic diagram of the exploded structure of a battery cell provided in some embodiments of the present application;

[0030] Figure 4 A schematic diagram of the structure of a heat exchange assembly provided in some embodiments of the present application;

[0031] Figure 5 for Figure 4 A partial enlarged schematic diagram of part A;

[0032] Figure 6 A schematic diagram of the structure of the end connection of the heat exchange assembly provided in some embodiments of the present application;

[0033] Figure 7 A schematic diagram of the structure of the side wall connection of the heat exchange component provided in some embodiments of the present application;

[0034] Figure 8 A schematic diagram of the structure of a heat exchange assembly including a protrusion provided in some embodiments of the present application;

[0035] Figure 9 Schematic diagram of the bonding structure between the protrusion and the first straight line segment provided in some embodiments of the present application.

[0036] Description of reference numerals:

[0037] 10. Vehicle; 100. Battery device; 200. Controller; 300. Motor; 110. Housing; 111. First portion; 112. Second portion; 113. Wall panel; 1131. Raised portion; 120. Battery cell; 121. End cap; 1211. Electrode terminal; 122. Housing; 123. Electrode assembly; 1231. Tab; 130. Heat exchange assembly; 140. First pipe section; 141. First inlet; 142. First outlet; 143. First straight section; 144. First bent section; 150. Second pipe section; 151. Second inlet; 152. Second outlet; 153. Second straight section; 154. Second bent section; 160. Connector. DETAILED DESCRIPTION

[0038] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0040] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0041] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0043] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0044] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0045] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0046] Currently, market developments indicate that rechargeable batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in various electronic devices, including electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As the application areas of rechargeable batteries continue to expand, market demand is also growing.

[0047] The battery device includes a battery cell and a casing. The casing is used to accommodate the battery cell and a heat exchange component that performs heat exchange with the battery cell to prevent external moisture, dust, chemicals, etc. from corroding and damaging the battery cell and the heat exchange component in the casing, thereby improving the service life and stability of the battery device.

[0048] In some embodiments, the heat exchange assembly includes curved heat exchange pipes. Due to the minimum bending radius of the heat exchange pipes, large gaps are formed between adjacent pipes after bending. This reduces the area of direct contact between the heat exchange pipes and the bottom of the battery cells, reducing the heat exchange efficiency of the battery cells and potentially affecting battery cell performance. Furthermore, due to the limited contact area between the heat exchange pipes and the battery cells, a significant temperature imbalance occurs between the areas of direct contact with the heat exchange pipes and areas of indirect contact with the battery cells, potentially affecting the temperature consistency of the battery cells.

[0049] Based on the above problems, the embodiments of the present application provide a battery device, an electrical device, and an energy storage device. The battery device includes a housing, a battery cell, and a heat exchange assembly. The housing includes a wall panel that surrounds and forms a receiving cavity. The battery cell is disposed in the receiving cavity. The heat exchange assembly is located between the battery cell and the wall panel to perform heat exchange with the battery cell. The heat exchange assembly includes a first pipe segment and a second pipe segment connected to each other. The first pipe segment includes an inlet for allowing a heat exchange medium to flow in, and the second pipe segment includes an outlet for allowing the heat exchange medium to flow out. The first pipe segment and the second pipe segment are both multi-turn spiral structures, and at least a portion of the second pipe segment is located between two adjacent turns of the first pipe segment. By adopting a multi-turn spiral structure and a cross-arranged design for the first and second pipe segments, the gap between the pipes in the heat exchange assembly can be reduced, the contact area between the heat exchange assembly and the battery cell can be increased, the heat exchange efficiency of the battery cell can be improved, and the performance of the battery cell can be fully utilized.

[0050] The battery devices disclosed in the embodiments of this application can be used, but are not limited to, in electrical equipment or energy storage devices such as vehicles, ships, or aircraft. The battery devices disclosed in this application can be used to form the power supply system of such electrical equipment or energy storage devices, thereby improving heat exchange efficiency and enhancing the performance of the battery cells.

[0051] The present invention provides an electrical device that uses a battery device as a power source. The electrical device may include, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, and the like. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, and the like.

[0052] An embodiment of the present application also provides an energy storage device that uses a battery device as a power source. The energy storage device may be, but is not limited to, an energy storage container, an energy storage cabinet, an energy storage power station, an energy storage battery pack, or a portable energy storage system.

[0053] For the convenience of description, the following embodiments are described by taking a vehicle 10 as an example of an electrical device according to an embodiment of the present application.

[0054] Please refer to Figure 1 , Figure 1Schematic diagram of the structure of the vehicle provided for some embodiments of the present application. The vehicle 10 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 10, and the battery device 100 can be provided at the bottom, head or tail of the vehicle 10. The battery device 100 can be used to power the vehicle 10. For example, the battery device 100 can serve as an operating power source for the vehicle 10. The vehicle 10 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and operating power requirements of the vehicle 10 during driving.

[0055] In some embodiments of the present application, the battery device 100 can serve not only as an operating power source for the vehicle 10 , but also as a driving power source for the vehicle 10 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 10 .

[0056] Please refer to Figure 2 , Figure 2 Schematic diagram of the exploded structure of a battery device provided in some embodiments of the present application. The battery device 100 includes a housing 110 and a battery cell 120, and the battery cell 120 is accommodated in the housing 110. The housing 110 is used to provide a storage space for the battery cell 120, and the housing 110 can adopt a variety of structures. In some embodiments, the housing 110 may include a first portion 111 and a second portion 112, and the first portion 111 and the second portion 112 cover each other, and the first portion 111 and the second portion 112 jointly define a storage space for accommodating the battery cell 120. The second portion 112 may be a hollow structure with one end open, and the first portion 111 may be a plate-like structure, and the first portion 111 covers the open side of the second portion 112, so that the first portion 111 and the second portion 112 jointly define a storage space; the first portion 111 and the second portion 112 may also be hollow structures with one side open, and the open side of the first portion 111 covers the open side of the second portion 112. Of course, the box body 110 formed by the first part 111 and the second part 112 can be in various shapes, such as a cylinder, a cuboid, etc.

[0057] In the battery device 100, there may be multiple battery cells 120, and the multiple battery cells 120 may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 120. The multiple battery cells 120 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery unit 120 may be housed within the housing 110. Of course, the battery device 100 may also be a battery module formed by first connecting the multiple battery cells 120 in series, in parallel, or in a hybrid connection, and then the multiple battery modules are further connected in series, in parallel, or in a hybrid connection to form an entire battery unit, which is then housed within the housing 110. The battery device 100 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 120.

[0058] Each battery cell 120 may be a secondary battery or a primary battery, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 120 may be cylindrical, flat, rectangular, or in other shapes.

[0059] Please refer to Figure 3 , Figure 3 Schematic diagram of the decomposition structure of a battery cell provided in some embodiments of the present application. Battery cell 120 refers to the smallest unit that constitutes a battery device. Figure 3 The battery cell 120 includes an end cap 121 , a shell 122 , an electrode assembly 123 and other functional components.

[0060] The end cap 121 is a component that covers the opening of the housing 122 to isolate the internal environment of the battery cell 120 from the external environment. The shape of the end cap 121 can be adapted to the shape of the housing 122 to fit the housing 122. Optionally, the end cap 121 can be made of a material with a certain degree of hardness and strength (such as an aluminum alloy). This prevents the end cap 121 from deforming under pressure or collision, providing the battery cell 120 with greater structural strength and improved safety. The end cap 121 can be provided with functional components such as electrode terminals 1211. The electrode terminals 1211 can be used to electrically connect to the electrode assembly 123 to transfer electrical energy to or from the battery cell 120. In some embodiments, the end cap 121 can also be provided with a pressure relief mechanism to release internal pressure when the internal pressure or temperature of the battery cell 120 reaches a threshold. The end cap 121 can also be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, and plastic. In some embodiments, an insulating member may be provided inside the end cap 121 to isolate the electrical connection components in the housing 122 from the end cap 121 to reduce the risk of short circuit.

[0061] The housing 122 is a component that cooperates with the end cap 121 to form the internal environment of the battery cell 120. This internal environment can accommodate the electrode assembly 123, electrolyte, and other components. The housing 122 and end cap 121 can be separate components. An opening can be provided in the housing 122, and the end cap 121 can be placed over the opening to form the internal environment of the battery cell 120. Alternatively, the end cap 121 and housing 122 can be integrated. Specifically, the end cap 121 and housing 122 can form a common connection surface before other components are inserted into the housing. When the interior of the housing 122 is to be enclosed, the end cap 121 can be placed over the housing 122. The housing 122 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylinder, or a hexagonal prism. Specifically, the shape of the housing 122 can be determined based on the specific shape and size of the electrode assembly 123. The housing 122 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, and plastic.

[0062] The electrode assembly 123 is a component in the battery cell 120 where electrochemical reactions occur. One or more electrode assemblies 123 may be contained in the housing 122. The electrode assembly 123 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly, and the parts of the positive and negative electrode sheets without active materials each constitute a tab 1231. The positive and negative electrode tabs may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the tabs 1231 connect the electrode terminals to form a current loop.

[0063] Combine Figure 2 、 Figure 4 and Figure 5 As shown, an embodiment of the present application provides a battery device 100, which includes a box body 110, a battery cell 120 and a heat exchange assembly 130. The box body 110 includes a wall panel 113, which surrounds and forms a receiving cavity; the battery cell 120 is arranged in the receiving cavity; the heat exchange assembly 130 is located between the battery cell 120 and the wall panel 113, so as to perform heat exchange with the battery cell 120; the heat exchange assembly 130 includes a first pipe segment 140 and a second pipe segment 150 connected to each other, the first pipe segment 140 includes an inlet for allowing a heat exchange medium to flow in, and the second pipe segment 150 includes an outlet for allowing a heat exchange medium to flow out; wherein, the first pipe segment 140 and the second pipe segment 150 are both multi-turn spiral structures, and at least a portion of the second pipe segment 150 is located between two adjacent turns of the first pipe segment 140.

[0064] The box body 110 is a structure for accommodating and carrying the battery cells 120 . The box body 110 includes an accommodating cavity surrounded by wall panels 113 , and the battery cells 120 are disposed in the accommodating cavity.

[0065] In some embodiments, the wall panel 113 may be the top panel of the box 110; in some embodiments, the wall panel 113 may be the bottom panel of the box 110; in some embodiments, the wall panel 113 may be an integrated structure connecting the top panel and the side panels of the box 110; in some embodiments, the wall panel 113 may be an integrated structure connecting the bottom panel and the side panels of the box 110. This embodiment of the application does not limit this specific structure.

[0066] The heat exchange assembly 130 is a structure for performing heat exchange on the battery cell 120. The heat exchange assembly 130 includes a first pipe section 140 and a second pipe section 150 that are fluidically connected. The first pipe section 140 and the second pipe section 150 are located between the battery cell 120 and the wall plate 113, and are in contact with the battery cell 120 for heat exchange.

[0067] In some embodiments, the first pipe segment 140 and the second pipe segment 150 can be integrally formed during the production process. The inlet of the first pipe segment 140 is used to introduce the heat exchange medium into the first pipe segment 140 and the second pipe segment 150, and the outlet of the second pipe segment 150 is used to discharge the heat exchange medium from the first pipe segment 140 and the second pipe segment 150.

[0068] In some embodiments, the first pipe segment 140 and the second pipe segment 150 can be independently manufactured parts, that is, the first pipe segment 140 is a first flow channel tube, and the second pipe segment 150 is a second flow channel tube. In subsequent manufacturing processes, the independent first flow channel tube is connected to the independent second flow channel tube. The first pipe segment 140, as the first flow channel tube, may include a first inlet 141 and a first outlet 142. The second pipe segment 150, as the second flow channel tube, may include a second inlet 151 and a second outlet 152. The first inlet 141 is used to introduce a heat exchange medium into the first pipe segment 140. The second inlet 151 is connected to the first outlet 142 to introduce the heat exchange medium discharged from the first outlet 142 into the second pipe segment 150. The second outlet 152 is used to discharge the heat exchange medium from the second pipe segment 150.

[0069] The material of the heat exchange medium is not limited, such as water, ethylene glycol aqueous solution, etc.

[0070] It should be noted that different molding processes can be used for different structures of the first pipe segment 140 and the second pipe segment 150. For example, if the pipe segment structure is complex, a metal injection molding process, a casting process, etc. can be used. For example, if the pipe segment structure is simple, an extrusion molding process, a stretching molding process, etc. can be used. The material of the first pipe segment 140 and the second pipe segment 150 is not limited, as long as it can meet the requirements of heat conduction and heat exchange, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc. The shape of the flow channel cross section of the first pipe segment 140 and the second pipe segment 150 is also not limited, such as circular, elliptical, square, etc. The flow channel cross section can be understood as the cross section perpendicular to the extension direction of the flow channel.

[0071] In some embodiments, the wall panel 113 is the top plate of the box body 110, and the first tube segment 140 and the second tube segment 150 are located between the top of the battery cell 120 and the top plate of the box body 110; in some embodiments, the wall panel 113 is the bottom plate of the box body 110, and the first tube segment 140 and the second tube segment 150 are located between the bottom of the battery cell 120 and the bottom plate of the box body 110.

[0072] The first tube segment 140 and the second tube segment 150 both have a multi-turn spiral structure. A multi-turn spiral structure is formed by continuously winding the first tube segment 140 and the second tube segment 150 multiple times around a central axis or a central fixed point. The number of turns can be determined based on actual conditions, such as 3, 4, or 5 turns. This multi-turn spiral structure is a planar structure, meaning that the first tube segment 140 and the second tube segment 150 are each in contact with the battery cell 120 to achieve heat exchange.

[0073] Because heat exchange piping often has bends, and bends must meet a minimum bending radius, this creates a gap between the piping before and after the bend. In some examples, a gap exists between two adjacent turns of the first pipe segment 140. At least a portion of the second pipe segment 150 is positioned between two adjacent turns of the first pipe segment 140, thereby filling the gap between the two adjacent turns of the first pipe segment 140. Similarly, the first pipe segment 140 can also be configured to be at least partially positioned between two adjacent turns of the second pipe segment 150. This cross-arrangement can reduce the area of the blank space in the heat exchange piping, thereby increasing the heat exchange area.

[0074] By adopting a multi-turn spiral structure and a cross-arranged design for the first pipe section and the second pipe section, the gap between the pipes in the heat exchange component can be reduced, the contact area between the heat exchange component 130 and the battery cell 120 can be increased, the heat exchange efficiency of the battery cell 120 can be improved, and the performance of the battery cell 120 can be fully utilized.

[0075] like Figure 4 and Figure 6As shown, according to some embodiments of the present application, the first tube segment 140 and the second tube segment 150 are configured to extend spirally around the same rotation center, and are alternately arranged radially outward from the rotation center.

[0076] There is a gap between adjacent turns of the first tube segment 140, and there is also a gap between adjacent turns of the second tube segment 150. The innermost end of the first tube segment 140 is connected to the innermost end of the second tube segment 150. The second tube segment 150 fills the gap between adjacent turns of the first tube segment 140, and the first tube segment 140 also fills the gap between adjacent turns of the second tube segment 150. The first tube segment 140 and the second tube segment 150 extend spirally around the same rotation center, nesting the first tube segment 140 and the second tube segment 150. The first tube segment 140 and the second tube segment 150 are arranged alternately in a radial direction outward from the rotation center. The radial direction is parallel to the plane of the surface of the wall panel 113 facing the battery cells 120.

[0077] In some embodiments, the first pipe section 140 is an independently manufactured first flow channel tube, and the innermost end of the first flow channel tube is the first outlet 142, that is, the first outlet 142 of the first flow channel tube is used as the starting point, and the tube extends outward from the center of rotation in a manner of continuous winding multiple circles; the second pipe section 150 is an independently manufactured second flow channel tube, and the innermost end of the second flow channel tube is the second inlet 151, that is, the second inlet 151 of the second flow channel tube is used as the starting point, and the tube extends outward from the center of rotation in a manner of continuous winding multiple circles.

[0078] Exemplarily, the first inlet 141 of the first flow channel tube and the second outlet 152 of the second flow channel tube are centrally symmetrical about the rotation center, that is, the number of winding turns of the first pipe segment 140 is the same as the number of winding turns of the second pipe segment 150, then the first pipe segment 140 and the second pipe segment 150 are centrally symmetrical about the rotation center.

[0079] For example, in order to facilitate the connection between the heat exchange component 130 and the external heat exchange device, the first inlet 141 of the first flow channel tube and the second outlet 152 of the second flow channel tube are adjacent to and arranged side by side, and the number of winding turns of the first pipe section 140 will be half a turn more than the number of winding turns of the second pipe section 150.

[0080] In some embodiments, the first pipe segment 140 and the second pipe segment 150 can be a continuous flow channel pipe structure formed by integrated manufacturing during the production process. The first pipe segment 140 and the second pipe segment 150 respectively take the connection point between the first pipe segment 140 and the second pipe segment 150 as the starting point, and extend outward from the rotation center in a continuous winding manner for multiple circles.

[0081] By spirally extending the first tube segment 140 and the second tube segment 150 around the same rotation center and nesting the first tube segment 140 and the second tube segment 150 with the innermost circle as the starting end, the waste of space between two adjacent circles of the first tube segment 140 and between two adjacent circles of the second tube segment 150 is further reduced, the contact area between the first tube segment 140 and the second tube segment 150 and the battery cell 120 is increased, and the heat exchange efficiency of the battery cell 120 is improved.

[0082] According to some embodiments of the present application, the first pipe segment 140 and the second pipe segment 150 are both continuous and smoothly transitioned spiral bends.

[0083] The first pipe segment 140 and the second pipe segment 150 can be a continuous flow channel structure formed by integrally manufacturing during the production process. Alternatively, the first pipe segment 140 and the second pipe segment 150 can be a continuous flow channel structure formed by connecting independent flow channel tubes. The first pipe segment 140 and the second pipe segment 150 have no sharp corners or sudden changes at the bends, so that the curvature of the first pipe segment 140 and the second pipe segment 150 changes continuously and gradually.

[0084] In some embodiments, the first tube segment 140 and the second tube segment 150 are connected and coiled to form a spiral structure that is approximately elliptical. In some embodiments, the first tube segment 140 and the second tube segment 150 are connected and coiled to form a multi-turn spiral structure that is approximately circular. It should be noted that the first tube segment 140 and the second tube segment 150 need to spiral outward or inward around the same rotation center, and although they cannot form a complete ellipse or circle, the overall structure resembles an ellipse or circle, and therefore the coiled structure is described as approximately elliptical or approximately circular.

[0085] By adopting a continuous and smoothly transitioned spiral bend design, the resistance encountered by the heat exchange medium during the flow process can be reduced, and the turbulence caused by the sudden change of the flow channel tube shape can be reduced, the generation of bubbles can be reduced, and the heat exchange efficiency can be improved.

[0086] like Figure 4 and Figure 6 As shown, according to some embodiments of the present application, the first pipe segment 140 includes alternately connected first straight segments 143 and first bent segments 144, and the second pipe segment 150 includes alternately connected second straight segments 153 and second bent segments 154, at least a part of the first straight segments 143 are adjacent to and side by side with the second straight segments 153, and at least a part of the first bent segments 144 are adjacent to and side by side with the second bent segments 154.

[0087] The first pipe section 140 includes a first straight section 143 and a first bent section 144. The first straight section 143 is the portion of the first pipe section 140 extending in a straight direction, and the first bent section 144 is the portion of the first pipe section 140 extending in a curved direction. The first bent section 144 is connected to the first straight section 143 and can change the flow direction of the heat exchange medium in the first straight section 143.

[0088] In some embodiments, a plurality of first straight segments 143 and first bent segments 144 are alternately connected, and a bending angle formed between the first straight segments 143 at both ends of the same bent segment may be greater than or equal to 90 degrees.

[0089] In some embodiments, the first tube segment 140 extends in a roughly U-shaped or polygonal spiral, that is, one circle of the first tube segment 140 includes four first straight line segments 143 and a first bending segment 144 located between two adjacent first straight line segments 143, and the angle formed between the two adjacent first straight line segments 143 is 90 degrees.

[0090] The second pipe section 150 includes a second straight section 153 and a second bent section 154 , and its structure and arrangement are the same as those of the first pipe section 140 .

[0091] In some embodiments, the bending angle of the first bending segment 144 is 90 degrees, the bending angle of the second bending segment 154 is also 90 degrees, at least a portion of the first bending segments 144 are adjacent to and arranged side by side with the second bending segments 154, and at least a portion of the first straight line segments 143 are adjacent to and arranged side by side with the second straight line segments 153.

[0092] In some embodiments, the ratio of the direct contact area between the heat exchange assembly 130 and the battery cell 120 to the bottom area of the battery cell 120 facing the heat exchange assembly 130 is greater than 90%.

[0093] It should be noted that since the first pipe segment 140 and the second pipe segment 150 are independently manufactured components, and the innermost end of the first pipe segment 140 and the innermost end of the second pipe segment 150 need to be connected, based on the difference in connection conditions, the first straight segment 143 of the innermost circle of the first pipe segment 140 and the second straight segment 153 of the innermost circle of the second pipe segment 150 can be arranged adjacent to and side by side, or they can be arranged non-adjacently. The first curved segment 144 of the innermost circle of the first pipe segment 140 and the second curved segment 154 of the innermost circle of the second pipe segment 150 can also be arranged adjacent to and side by side, or they can be arranged non-adjacently. Specific arrangements can be made based on actual layout requirements and are not limited in this embodiment.

[0094] By adopting a flow channel form of alternating straight segments and curved segments and arranging flow channel tubes of the same structural type adjacently and side by side, the gap between the first tube segment 140 and the second tube segment 150 can be reduced, and the contact area between the first tube segment 140 and the second tube segment 150 and the battery cell 120 can be increased.

[0095] like Figure 6 As shown, according to some embodiments of the present application, the end of the first straight line segment 143 of the innermost circle of the first pipe segment 140 is connected to the end of the second straight line segment 153 of the innermost circle of the second pipe segment 150; wherein, the extension direction of the first straight line segment 143 located in the innermost circle coincides with the extension direction of the second straight line segment 153 located in the innermost circle.

[0096] The inlet of the first pipe section 140 is used to introduce the heat exchange medium into the first pipe section 140 , and the heat exchange medium is introduced into the second pipe section 150 through the first pipe section 140 . The outlet of the second pipe section 150 is used to discharge the heat exchange medium from the second pipe section 150 .

[0097] In some embodiments, the first pipe segment 140 and the second pipe segment 150 are continuous flow channel pipe structures formed by integrated manufacturing during the production process, so that the extension direction of the innermost first straight segment 143 in the first pipe segment 140 coincides with the extension direction of the innermost second straight segment 153 in the second pipe segment 150.

[0098] In some embodiments, the first pipe segment 140 and the second pipe segment 150 are independently manufactured flow passages. The outlet of the first pipe segment 140 is located at the end of the innermost first straight segment 143, and the inlet of the second pipe segment 150 is located at the end of the innermost second straight segment 153. The innermost second straight segment 153 coincides with the extension direction of the innermost first straight segment 143. The outlet of the first pipe segment 140 and the inlet of the second pipe segment 150 are arranged opposite and interconnected. The heat exchange medium passes through the first straight segment 143 and is discharged through the first outlet 142 along the extension direction of the first straight segment 143. It then enters the second pipe segment 150 through the second inlet 151 along the extension direction of the second straight segment 153. Connecting the first and second pipe segments at their ends facilitates alignment of the first and second pipe segments 140, 150, reduces the difficulty of connection positioning, facilitates the connection operation, and improves connection quality.

[0099] By connecting the ends of the straight segments, it is helpful to reduce the resistance generated by the flow, reduce the pressure head loss, and help to speed up the heat exchange rate.

[0100] like Figure 7As shown, according to some embodiments of the present application, the side wall of the first straight line segment 143 of the innermost circle in the first tube segment 140 is connected to the side wall of the second straight line segment 153 of the innermost circle in the second tube segment 150; wherein, the first straight line segment 143 located in the innermost circle and the second straight line segment 153 located in the innermost circle are parallel and adjacently arranged side by side.

[0101] The inlet of the first pipe section 140 is used to introduce the heat exchange medium into the first pipe section 140 , and the heat exchange medium is introduced into the second pipe section 150 through the first pipe section 140 . The outlet of the second pipe section 150 is used to discharge the heat exchange medium from the second pipe section 150 .

[0102] In some embodiments, the first pipe segment 140 and the second pipe segment 150 are two integrally formed parts of a single pipe. The innermost first straight segment 143 of the first pipe segment 140 and the innermost second straight segment 153 of the second pipe segment 150 are arranged parallel to and adjacent to each other, and the sidewalls of the innermost first straight segment 143 are connected to the sidewalls of the innermost second straight segment 153. It is understood that fluid communication between the sidewalls of the first straight segment 143 and the sidewalls of the innermost second straight segment 153 can be achieved through any feasible means, such as by preserving a connecting pipe between the two during the heat exchange pipe molding process, or by directly combining the two sidewalls into one and providing a through hole to enable the circulation of the heat exchange medium.

[0103] In some embodiments, the first pipe segment 140 and the second pipe segment 150 are flow channel tubes manufactured separately. The side wall of the first straight segment 143 located in the innermost circle is provided with an outlet allowing the heat exchange medium to flow out of the first pipe segment 140, and the side wall of the second straight segment 153 located in the innermost circle is provided with an inlet allowing the heat exchange medium to flow into the second pipe segment 150. The outlet of the first pipe segment 140 and the inlet of the second pipe segment 150 are arranged opposite to each other and are connected to each other.

[0104] In some embodiments, the first straight line segment 143 of the innermost circle is between two adjacent circles of the second pipe segment 150, and the second straight line segment 153 of the innermost circle is between two adjacent circles of the first pipe segment 140. This can maximize the filling of the blank area in the docking area of the two innermost pipe segments, thereby increasing the heat exchange area.

[0105] By connecting the straight sidewalls, the innermost first straight segment 143 and the innermost second straight segment 153 fill the gap left by the bending process, thereby increasing the contact area between the first tube segment 140 and the second tube segment 150 and the battery cell 120.

[0106] like Figure 8As shown, according to some embodiments of the present application, a protrusion 1131 is provided on the side of the wall panel 113 facing the heat exchange component 130, and the orthographic projection of the protrusion 1131 on the wall panel 113 is staggered with the orthographic projection of the heat exchange component 130 on the wall panel 113.

[0107] The raised portion 1131 is a structure used to assist in securing the first pipe segment 140 and the second pipe segment 150. It is located on the side of the wall panel 113 facing the heat exchange assembly 130. In some examples, the raised portion 1131 can be a separately manufactured component, mounted and fixed to the wall panel 113, and its material can be, for example, iron, copper, aluminum, etc. In some examples, the raised portion 1131 and the wall panel 113 can be integrally formed during the production process.

[0108] The orthographic projection of the protrusion 1131 on the wall plate 113 is staggered with the orthographic projection of the heat exchange assembly 130 on the wall plate 113 , that is, the protrusion 1131 is located in any blank area on the wall plate 113 that is not connected to the heat exchange assembly 130 .

[0109] In some embodiments, the protrusion 1131 is arranged on the periphery of the heat exchange component 130, that is, the protrusion 1131 contacts the outermost layer of the first pipe segment 140, which is used to limit the movement of the first pipe segment 140 on the wall panel 113 and improve the stability of the fixation of the first pipe segment 140 and the second pipe segment 150.

[0110] In some embodiments, the protrusion 1131 is disposed at the blank gap between the heat exchange components 130 to limit the movement of the first pipe segment 140 and the second pipe segment 150 .

[0111] In some embodiments, the protrusion height of the protrusion 1131 is the same as the thickness of the heat exchange assembly 130, and the extension direction of the protrusion height is perpendicular to the plane on which the side of the wall panel 113 faces the heat exchange assembly 130. The extension direction of the thickness of the heat exchange assembly 130 is also perpendicular to the plane on which the side of the wall panel 113 faces the heat exchange assembly 130, that is, the top surface of the protrusion 1131 is coplanar with the contact surface between the heat exchange assembly 130 and the battery cell 120, so as to improve the stability of the placement of the battery cell 120.

[0112] By adopting the structural design of the raised portion 1131 and utilizing the structure of the raised portion 1131 to limit and fix the first pipe section 140 and the second pipe section 150, the stability of the installation of the first pipe section 140 and the second pipe section 150 can be improved. At the same time, the raised portion 1131 fills the blank area, which can reduce the use of glue and reduce production costs.

[0113] like Figure 8 As shown, according to some embodiments of the present application, there are multiple protrusions 1131 , and at least one protrusion 1131 is located in the gap between the first pipe segment 140 and the second pipe segment 150 .

[0114] The protrusions 1131 are used to assist in securing the first pipe segment 140 and the second pipe segment 150. The number and shape of the protrusions 1131 can be determined based on the shape of the blank area on the wall panel 113 that is not connected to the heat exchange assembly 130. Examples include three, four, or five protrusions, and shapes such as cylinders and cubes.

[0115] In some embodiments, the first pipe segment 140 and the second pipe segment 150 are both continuous and smoothly transitioned spiral bends, and the protrusion 1131 is also a continuous and smoothly transitioned spiral protrusion structure. The protrusion 1131 is arranged in the gap between the first pipe segment 140 and the second pipe segment 150.

[0116] In some embodiments, the first tube segment 140 includes a first straight segment 143, the second tube segment 150 includes a second straight segment 153, the first straight segment 143 and the second straight segment 153 are arranged side by side and adjacent to each other, the protrusion 1131 is a protrusion structure extending in a straight line, and the protrusion 1131 is arranged in the gap between the first straight segment 143 and the second straight segment 153.

[0117] By arranging the protrusion 1131 at the gap between the first pipe section 140 and the second pipe section 150 , the first pipe section 140 and the second pipe section 150 are limited and fixed, thereby improving the installation stability of the first pipe section 140 and the second pipe section 150 .

[0118] like Figure 8 As shown, according to some embodiments of the present application, the first tube segment 140 includes a first bending segment 144, the second tube segment 150 includes a second bending segment 154 adjacent to and arranged side by side with the first bending segment 144, and at least one protrusion 1131 is located in the gap between the adjacent first bending segments 144 and the second bending segments 154.

[0119] The protrusion 1131 can be set at any gap position between the first pipe section 140 and the second pipe section 150 according to the blank area on the wall plate 113 that is not connected to the heat exchange component 130.

[0120] The first tube section 140 includes a first bending section 144, and the second tube section 150 includes a second bending section 154. The first bending section 144 and the second bending section 154 are adjacent to each other and are arranged side by side. Since the first bending section 144 and the second bending section 154 are limited by the bending process itself, the inner circle bending radius will be smaller than the outer circle bending radius, so that the bending radii of the adjacent parts of the first bending section 144 and the second bending section 154 arranged side by side are inconsistent, and thus the two cannot be arranged closely, and a large blank area will appear.

[0121] In some embodiments, the maximum gap between adjacent first and second bend segments 144, 154 may exceed 100 mm. The raised portion 1131 is configured as a corresponding raised structure to fill the arc-shaped blank area between the first and second bend segments 144, 154. For example, a corresponding number of raised portions 1131 may fill the gaps formed by multiple first and second bend segments 144, 154.

[0122] By setting the protrusion 1131 in the gap between the first bending section 144 and the second bending section 154, the first pipe section 140 and the second pipe section 150 are limited and fixed, which can improve the installation stability of the first pipe section 140 and the second pipe section 150, and can also reduce the use of glue and reduce production costs.

[0123] like Figure 9 As shown, according to some embodiments of the present application, adhesive is further provided between the wall plate 113 and the battery cell 120 , and the adhesive is filled in the gap of the heat exchange assembly 130 to bond the battery cell 120 , the heat exchange assembly 130 and the wall plate 113 .

[0124] Heat exchange assembly 130 includes a first pipe section 140 and a second pipe section 150, which are connected to wall panel 113 via adhesive. Adhesives include viscous adhesives, thermally conductive adhesives, and the like. Thermally conductive adhesives, also known as thermally conductive silicone, are primarily organic silicone rubber, mixed with fillers, thermally conductive materials, and other polymer materials. These adhesives exhibit excellent thermal conductivity and electrical insulation properties, such as ultra-high temperature thermally conductive adhesives, organic silicone thermally conductive adhesives, and polyurethane adhesives.

[0125] In some embodiments, the gap between the first tube segment 140 and the second tube segment 150 is filled with adhesive, so that the first tube segment 140 , the second tube segment 150 , the battery cell 120 , and the wall plate 113 are bonded together.

[0126] In some embodiments, a raised portion 1131 is provided in the gap between the first and second tube segments 140, 150. Considering the installation process, a relatively small gap (e.g., 1 mm, 2 mm, etc.) may exist between the raised portion 1131 and the first and second tube segments 140, 150. Glue may also be filled between the raised portion 1131 and the first and second tube segments 140, 150, respectively, so that the first and second tube segments 140, 150 are bonded to the raised portion 1131. Furthermore, the raised portion 1131 fills the empty space, reducing glue usage and lowering production costs.

[0127] By utilizing the bonding strength of the adhesive, the battery cell 120, the heat exchange assembly 130 and the wall panel 113 can be firmly connected, so that the battery cell 120 and the heat exchange assembly 130 will not move easily, thereby improving the stability of the internal connection of the box body 110. At the same time, the bonding connection method is simple and convenient to operate, which reduces the difficulty of assembly and improves assembly efficiency.

[0128] According to some embodiments of the present application, the protrusion 1131 is constructed to be integrally formed by stamping the wall panel 113 .

[0129] The raised portion 1131 can be directly formed by stamping.

[0130] In some embodiments, the wall panel 113 may serve as the top plate of the box body 110 , and the raised portion 1131 may be integrally formed by stamping the top plate of the box body 110 .

[0131] In some embodiments, the wall panel 113 may serve as the bottom plate of the box body 110 , and the raised portion 1131 may be integrally formed by stamping the bottom plate of the box body 110 .

[0132] By adopting the process of stamping the wall panel 113, the manufacturing process and time can be reduced, which is beneficial to improving production efficiency and reducing production costs; at the same time, the integrally formed protrusion 1131 and the overall structure of the wall panel 113 are more stable, which helps to limit and fix the first pipe section 140 and the second pipe section 150.

[0133] like Figure 4 and Figure 5 As shown, according to some embodiments of the present application, the first pipe segment 140 and the second pipe segment 150 are both flat-mouth pipes.

[0134] A flat-mouth tube refers to a fluid conduit with a relatively large aspect ratio of its cross-section. In some embodiments, the cross-section of the flat-mouth tube can be rectangular or elliptical, and the aspect ratio of the flat-mouth tube can be greater than or equal to 5, for example, 5, 8, 10, 12, 15, 20, etc. In some embodiments, the first tube segment 140 and the second tube segment 150 are flat-mouth tubes of the same specifications.

[0135] In some embodiments, one of the two opposite sides with a larger area in the first tube segment 140 contacts the battery cell 120, and the other side is connected to the wall panel 113; similarly, one of the two opposite sides with a larger area in the second tube segment 150 contacts the battery cell 120, and the other side is connected to the wall panel 113.

[0136] By adopting the flat-mouth tube structure design, the contact area between the first tube section 140 and the second tube section 150 and the battery cell 120 can be increased, further improving the heat exchange efficiency of the battery cell 120.

[0137] Figure 6 and Figure 7 As shown, according to some embodiments of the present application, the first pipe section 140 is a first flow channel tube including a first inlet 141 and a first outlet 142, and the second pipe section 150 is a second flow channel tube including a second inlet 151 and a second outlet 152; the inlet allowing the heat exchange medium to flow in is located at the first inlet 141 of the first flow channel tube, and the outlet allowing the heat exchange medium to flow out is located at the second outlet 152 of the second flow channel tube, and the first outlet 142 of the first flow channel tube is connected to the second inlet 151 of the second flow channel tube.

[0138] The first pipe section 140 and the second pipe section 150 are independently manufactured components. Specifically, the first pipe section 140 serves as the first flow tube, and the second pipe section 150 serves as the second flow tube. The first and second flow tubes can be manufactured using any process, such as metal injection molding, casting, extrusion, or stretching. The materials used for the first and second flow tubes are also available, such as copper, iron, aluminum, stainless steel, or aluminum alloys.

[0139] The first flow channel includes a first inlet 141 and a first outlet 142 . The first inlet 141 is used to introduce the heat exchange medium into the first pipe section 140 , and the first outlet 142 is used to discharge the heat exchange medium from the first pipe section 140 .

[0140] The second flow channel includes a second inlet 151 and a second outlet 152 . The second inlet 151 introduces the heat exchange medium discharged from the first outlet 142 into the second pipe section 150 , and the second outlet 152 is used to discharge the heat exchange medium from the second pipe section 150 .

[0141] By connecting the first outlet 142 with the second inlet 151 , a circulating flow of the heat exchange medium is finally achieved, in which the heat exchange medium is introduced from the inlet of the first pipe section 140 and discharged from the outlet of the second pipe section 150 .

[0142] By independently manufacturing the first pipe section 140 and the second pipe section 150 into a multi-turn spiral structure and connecting the two by subsequent assembly, the difficulty of the manufacturing process can be reduced compared to the manufacturing process of integrally forming the two, which helps to reduce the manufacturing cost.

[0143] like Figure 7 and Figure 8 As shown, according to some embodiments of the present application, the connection method between the first outlet 142 and the second inlet 151 includes one or more of welding, threaded connection and bonding.

[0144] The first pipe section 140 and the second pipe section 150 are connected via a first outlet 142 and a second inlet 151 .

[0145] In some embodiments, the first pipe section 140 and the second pipe section 150 are made of the same material, for example, a copper pipe, an aluminum pipe, etc., and the first outlet 142 and the second inlet 151 are connected by welding.

[0146] In some embodiments, the first outlet 142 is provided with a threaded structure, and the second inlet 151 is also provided with a corresponding threaded structure, and the first outlet 142 and the second inlet 151 are connected by a threaded connection. It should be noted that, given that the first pipe section 140 and the second pipe section 150 both have a multi-turn helical structure, thread rotation may interfere with each other. The number of thread rotations can be reduced according to actual conditions. For example, the first outlet 142 and the second inlet 151 can be connected by rotating half a turn relative to each other.

[0147] In some embodiments, the flow channel cross-section of the first outlet 142 is slightly larger than the flow channel cross-section of the second inlet 151, and the second pipe section 150 partially extends into the first pipe section 140 to achieve interference fit, and the first outlet 142 and the second inlet 151 are connected by bonding.

[0148] In some embodiments, the first outlet 142 is provided with a threaded structure, and the second inlet 151 is also provided with a corresponding threaded structure. At the same time, adhesive is added to the threaded structure, so that the first outlet 142 and the second inlet 151 are connected by threads and also bonded.

[0149] By adopting a direct connection method, the use of parts can be reduced, which facilitates the installation and arrangement of the first pipe section 140 and the second pipe section 150; at the same time, multiple connection methods are provided to facilitate selection of a suitable connection method according to actual conditions, and can also meet the connection and use requirements of different scenarios.

[0150] like Figure 4 and Figure 5 As shown, according to some embodiments of the present application, the heat exchange assembly 130 also includes a connector 160 connecting the first outlet 142 and the second inlet 151; wherein the first outlet 142 and the second inlet 151 are each connected to the connector 160 by welding, clamping, threading or bonding.

[0151] The connector 160 is a structure for connecting the first outlet 142 with the second inlet 151. The connector 160 includes a welding connector, a threaded connector, a quick-connect connector, and the like.

[0152] In some embodiments, the connector 160 is a welding connector, and the first outlet 142 and the second inlet 151 are welded to the welding connector respectively to achieve the connection between the first outlet 142 and the second inlet 151 .

[0153] In some embodiments, connector 160 is a threaded connector, and the ends of first pipe segment 140 and second pipe segment 150 are respectively threadedly connected to the threaded connector. It should be noted that the direction of thread rotation can be set according to actual needs, and the first pipe segment 140 and the second pipe segment 150 can be connected simultaneously by rotating the threaded connector.

[0154] In some embodiments, the connector 160 is a quick-connect connector. The ends of the first pipe section 140 and the second pipe section 150 are respectively inserted into the quick-connect connector to achieve a snap connection between the first outlet 142 and the second inlet 151 .

[0155] In some embodiments, the ends of the first pipe segment 140 and the second pipe segment 150 are respectively inserted into the connector 160 and bonded to the connector 160 by adhesive, thereby achieving connection between the first outlet 142 and the second inlet 151 .

[0156] By adopting the connection method of the connecting piece 160, there is no need to distinguish between the first pipe section 140 and the second pipe section 150, which facilitates the mass production of parts, can increase production speed and reduce production costs; at the same time, the connecting piece 160 can improve the convenience of installation and connection of the first pipe section 140 and the second pipe section 150, thereby improving assembly efficiency.

[0157] According to some embodiments of the present application, the first pipe section 140 includes multiple first sub-flow channels, and the second pipe section 150 includes multiple second sub-flow channels. The multiple first sub-flow channels are the same in number as the multiple second sub-flow channels and are connected in a one-to-one correspondence.

[0158] The cross-sectional shapes of the flow channels of the first pipe segment 140 and the second pipe segment 150 are not limited and can be, for example, circular, elliptical, square, etc. The first pipe segment 140 includes a plurality of first sub-flow channels, for example, 3, 4, 5, etc. The cross-sectional shapes of the first sub-flow channels can be, for example, elliptical, square, circular, polygonal, etc. The number and cross-sectional shapes of the second sub-flow channels of the second pipe segment 150 should correspond to the number and cross-sectional shapes of the first sub-flow channels to ensure that the heat exchange medium in the first sub-flow channels can flow into the second sub-flow channels.

[0159] In some embodiments, both the first tube segment 140 and the second tube segment 150 are flat-mouthed tubes. The first tube segment 140 is evenly divided into three first sub-channels along its width. The second tube segment 150 is also evenly divided into three second sub-channels along its width, with the width direction being parallel to the plane of the surface of the wall plate 113 facing the battery cells 120. The three first sub-channels of the first tube segment 140 are connected to the three second sub-channels of the second tube segment 150 in a one-to-one correspondence, thereby connecting the first outlet 142 of the first tube segment 140 to the second inlet 151 of the second tube segment 150.

[0160] By adopting a structural design with multiple sub-channels, the contact area between the heat exchange medium and the channel wall can be increased, which is beneficial to the transfer of heat and thus improves the heat exchange efficiency; at the same time, the structural design of multiple sub-channels can enhance the uniformity of the distribution of the heat exchange medium, so that the heat can be evenly transmitted, further improving the heat exchange efficiency.

[0161] According to some embodiments of the present application, the wall panel 113 is the bottom panel of the box body 110 or the top panel of the box body 110 .

[0162] The housing 110 includes a top plate, side plates, and a bottom plate. These plates collectively define a cavity for accommodating the battery cells 120. In some examples, the top plate, side plates, and bottom plate can be manufactured separately during production; in some examples, the top plate and side plates can be integrally formed during production; and in some examples, the side plates and bottom plate can be integrally formed during production.

[0163] In some embodiments, the wall panel 113 is the bottom plate of the box body 110, and the first tube segment 140 and the second tube segment 150 are respectively bonded to the bottom plate. The bottom plate provides support for the first tube segment 140 and the second tube segment 150, so that the first tube segment 140 and the second tube segment 150 are in contact with the bottom of the battery cell 120 to achieve heat exchange.

[0164] In some embodiments, the wall panel 113 is the top plate of the box body 110, and the first tube segment 140 and the second tube segment 150 are respectively bonded to the top plate. The top plate provides bonding force for the first tube segment 140 and the second tube segment 150, so that the first tube segment 140 and the second tube segment 150 are in contact with the top of the battery cell 120 to achieve heat exchange.

[0165] By using the wall panel 113 as the bottom plate or top plate of the box body 110, the first pipe section 140 and the second pipe section 150 can achieve heat exchange with the top or bottom of the battery cell 120, providing heat exchange layout methods at different positions, making it easy to select a suitable heat exchange position according to actual conditions, and also meeting the heat exchange structure layout requirements in different scenarios.

[0166] An embodiment of the present application provides an electrical device, including the battery device 100 in any of the above embodiments, and the battery device 100 is used to provide electrical energy.

[0167] An embodiment of the present application provides an energy storage device, including the battery device 100 in any of the above embodiments, and the energy storage device is used to store electrical energy.

[0168] In some implementations, combined Figure 4 and Figure 8As shown, the battery device 100 includes a box body 110, a battery cell 120 and a heat exchange assembly 130. The box body 110 includes a wall plate 113, which is the bottom plate of the box body 110. The heat exchange assembly 130 is located between the battery cell 120 and the bottom plate.

[0169] Heat exchange assembly 130 includes a first pipe section 140 and a second pipe section 150. First pipe section 140 is a separately manufactured first flow channel tube, while second pipe section 150 is a separately manufactured second flow channel tube. The first and second flow channels are connected and each has a multi-turn helical structure. The first flow channel tube includes a first inlet 141 and a first outlet 142, while the second flow channel tube includes a second inlet 151 and a second outlet 152. The first and second flow channels extend helically around the same rotation center and are alternately arranged radially outward from the rotation center.

[0170] The first flow conduit includes alternating first straight segments 143 and first curved segments 144. The first outlet 142 of the first flow conduit is located at the end of the innermost first straight segment 143. The second flow conduit includes alternating second straight segments 153 and second curved segments 154. The second inlet 151 of the second flow conduit is located at the end of the innermost second straight segment 153. At least some of the first straight segments 143 and second straight segments 153 are arranged adjacent to and side by side, and at least some of the first curved segments 144 and second curved segments 154 are arranged adjacent to and side by side. The first straight segments 143 and second straight segments 153 located in the innermost circle extend in the same direction. The first outlet 142 of the first flow conduit is connected to the second inlet 151 of the second flow conduit via a connector 160.

[0171] The side of the bottom plate facing the heat exchange assembly 130 is provided with a plurality of raised portions 1131, which are integrally formed by stamping the bottom plate. Some of the raised portions 1131 are located in the gap between the adjacent first straight segment 143 and the second straight segment 153, while some are located in the gap between the adjacent first curved segment 144 and the second curved segment 154.

[0172] The thermal conductive adhesive is filled in the gaps of the heat exchange assembly 130 to bond the battery cells 120 , the heat exchange assembly 130 and the bottom plate together.

[0173] Among them, the first flow channel tube and the second flow channel tube are both flat-mouth tubes, multiple first sub-flow channels are arranged inside the first flow channel tube, and multiple second sub-flow channels are arranged inside the second flow channel tube. The multiple first sub-flow channels are the same in number as the multiple second sub-flow channels and are connected one-to-one.

[0174] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: The box body includes a wall panel, wherein the wall panel surrounds and forms a receiving cavity; A battery cell is disposed in the accommodating cavity; a heat exchange assembly, located between the battery cell and the wall plate, for performing heat exchange with the battery cell; the heat exchange assembly comprises a first pipe segment and a second pipe segment connected to each other, the first pipe segment comprising an inlet for allowing a heat exchange medium to flow in, and the second pipe segment comprising an outlet for allowing a heat exchange medium to flow out; The first pipe segment and the second pipe segment are both multi-turn spiral structures, and at least a portion of the second pipe segment is located between two adjacent turns of the first pipe segment.

2. The battery device according to claim 1, wherein: The first pipe segment and the second pipe segment are configured to extend spirally around the same rotation center and are alternately arranged radially outward from the rotation center.

3. The battery device according to claim 2, characterized in that The first pipe section and the second pipe section are both continuous and smoothly transitioned spiral bends.

4. The battery device according to claim 2, wherein: The first tube segment includes alternately connected first straight segments and first bent segments, and the second tube segment includes alternately connected second straight segments and second bent segments. At least a portion of the first straight segments are adjacent to and arranged side by side with the second straight segments, and at least a portion of the first bent segments are adjacent to and arranged side by side with the second bent segments.

5. The battery device according to claim 4, characterized in that The end of the first straight line segment of the innermost circle of the first pipe segment is connected to the end of the second straight line segment of the innermost circle of the second pipe segment; The extension directions of the first straight line segment located in the innermost circle coincide with the extension directions of the second straight line segment located in the innermost circle.

6. The battery device according to claim 4, characterized in that The side wall of the first straight segment of the innermost circle of the first pipe segment is connected to the side wall of the second straight segment of the innermost circle of the second pipe segment; The first straight line segment located in the innermost circle is parallel to the second straight line segment located in the innermost circle and is adjacent to and arranged side by side.

7. The battery device according to any one of claims 1 to 6, characterized in that: A protrusion is provided on a side of the wall plate facing the heat exchange component, and the orthographic projection of the protrusion on the wall plate and the orthographic projection of the heat exchange component on the wall plate are staggered.

8. The battery device according to claim 7, characterized in that There are a plurality of protrusions, and at least one of the protrusions is located at a gap between the first pipe segment and the second pipe segment.

9. The battery device according to claim 8, characterized in that The first tube segment includes a first bending segment, the second tube segment includes a second bending segment adjacent to and arranged side by side with the first bending segment, and at least one of the protrusions is located in a gap between the adjacent first bending segment and the second bending segment.

10. The battery device according to claim 7, characterized in that Adhesive is further provided between the wall plate and the battery cell, and the adhesive is filled in the gap of the heat exchange component to bond the battery cell, the heat exchange component and the wall plate.

11. The battery device according to claim 8, characterized in that The protrusion is configured to be integrally formed by stamping the wall panel.

12. The battery device according to any one of claims 1 to 6, characterized in that: The first pipe section and the second pipe section are both flat-mouth pipes.

13. The battery device according to any one of claims 1 to 6, characterized in that: The first pipe section is a first flow channel pipe including a first inlet and a first outlet, and the second pipe section is a second flow channel pipe including a second inlet and a second outlet; The inlet for allowing the heat exchange medium to flow in is located at the first inlet of the first flow channel tube, and the outlet for allowing the heat exchange medium to flow out is located at the second outlet of the second flow channel tube. The first outlet of the first flow channel tube is connected to the second inlet of the second flow channel tube.

14. The battery device according to claim 13, wherein: The connection method between the first outlet and the second inlet includes one or more of welding, threaded connection and bonding.

15. The battery device according to claim 13, wherein: The heat exchange assembly further includes a connecting piece connecting the first outlet and the second inlet; Wherein, the first outlet and the second inlet are respectively connected to the connecting piece by welding, clamping, threading or bonding.

16. The battery device according to any one of claims 1 to 6, characterized in that: The first pipe section includes a plurality of first sub-flow channels, and the second pipe section includes a plurality of second sub-flow channels. The plurality of first sub-flow channels is the same in number as the plurality of second sub-flow channels and is connected in a one-to-one correspondence.

17. The battery device according to any one of claims 1 to 6, characterized in that: The wall panel is the bottom panel of the box or the top panel of the box.

18. An electrical device, characterized in that: The electrical device comprises the battery device according to any one of claims 1 to 17, and the battery device is used to provide electrical energy.

19. An energy storage device, characterized in that: The energy storage device comprises the battery device according to any one of claims 1 to 17, and the energy storage device is used to store electrical energy.

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