Battery device and electric device

Abstract

The present application is suitable for the technical field of batteries, and provides a battery device and an electric device. The battery device comprises a case; a battery cell assembly, arranged in the case; and a thermal management component, arranged in the case and used for heat exchange with the battery cell assembly, wherein the thermal management component comprises a heat exchange pipe and a current collecting component; a plurality of heat exchange flow channels are arranged in the heat exchange pipe; a first relief structure is arranged at the end of the heat exchange pipe; the current collecting component comprises a current collector, an adapter sleeve ring and a blocking piece; the adapter sleeve ring is sealingly sleeved on the end of the heat exchange pipe; the adapter sleeve ring is connected to the first relief structure; the blocking piece is arranged at the port of at least one heat exchange flow channel close to the adapter sleeve ring and supports the heat exchange pipe; and the current collector is sealingly connected to the adapter sleeve ring, so that a heat exchange medium circulates between the heat exchange flow channels and the current collector. The battery device provided by embodiments of the present application can reduce the risk of lithium precipitation of battery cells caused by the blocking piece in the thermal management component.

Description

Battery devices and power-consuming devices

[0001] This application incorporates, in its entirety, Chinese Patent Application No. 202410501046.5, filed on April 24, 2024, entitled "Thermal Management Components, Manufacturing Process Thereof, Battery, Electrical Device", and Chinese Patent Application No. 202420869133.1, filed on April 24, 2024, entitled "Thermal Management Components, Battery, Electrical Device", and Chinese Patent Application No. 202423009268.X, filed on December 6, 2024, entitled "Battery Device and Electrical Device". Technical Field

[0002] This application relates to the field of battery thermal management technology, and in particular to a battery device and an electrical device. Background Technology

[0003] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0004] Temperature has a significant impact on battery performance, so conventional batteries are equipped with thermal management components to cool the battery or heat it up in low-temperature environments to bring it to its normal operating temperature range.

[0005] Currently, some thermal management components use adapters at the ends of heat exchange tubes to seal the current collector to the adapter, thus connecting the current collector to the heat exchange tube. To improve connection stability, the connection length between the adapter and the heat exchange tube is relatively long. Consequently, the sealing element within the heat exchange channel is also relatively long to support the end of the heat exchange tube. However, battery cells expand during charging and discharging. If the sealing element is too long, it will be directly opposite the battery cell, potentially squeezing it and increasing the risk of lithium plating. Summary of the Invention

[0006] In view of this, embodiments of this application provide a battery device and an electrical device that can reduce the risk of lithium plating in battery cells caused by sealing components in thermal management components.

[0007] An embodiment of the first aspect of this application provides a battery device, comprising: a housing; a battery cell assembly disposed within the housing; and a thermal management component disposed within the housing and used for heat exchange with the battery cell assembly. The thermal management component includes a heat exchange tube and a current collector. The heat exchange tube has multiple heat exchange channels, and its end has a first concave-convex structure. The current collector includes a current collector, a connecting collar, and a sealing element. The connecting collar is sealed and fitted onto the end of the heat exchange tube and connected to the first concave-convex structure. The sealing element is disposed at at least one heat exchange channel near the port of the connecting collar and supports the heat exchange tube. The current collector is sealed and connected to the connecting collar to allow heat exchange medium to flow between the heat exchange channels and the current collector.

[0008] In the battery device provided in this application embodiment, the thermal management component includes a heat exchange tube and a current collector. The current collector includes a current collector, an adapter ring, and a sealing element. The adapter ring is sealed and fitted onto the end of the heat exchange tube. The current collector is connected to the end of the heat exchange tube through the adapter ring, thereby improving the connection stability and sealing reliability between the current collector and the heat exchange tube. Since the end of the heat exchange tube is provided with a first concave-convex structure, and the adapter ring is connected to the first concave-convex structure, the first concave-convex structure increases the connection area between the heat exchange tube and the adapter ring. This allows the thermal management component to shorten the length of the adapter ring and the length of the sealing element, reducing the risk of lithium plating in the battery cells caused by the sealing element being directly opposite the battery cell assembly.

[0009] In some embodiments, the heat exchange tube has a first outer wall surface, the transition collar has a first inner wall surface, a first concave-convex structure is disposed on the first outer wall surface, and the first inner wall surface is connected to the first concave-convex structure.

[0010] By adopting the above technical solution, the first inner wall surface of the transition collar is connected to the first concave-convex structure, which increases the connection area between the transition collar and the heat exchange tube, and helps to shorten the length of the transition collar.

[0011] In some embodiments, the first inner wall surface has a second concave-convex structure, which engages with the first concave-convex structure.

[0012] By adopting the above technical solution, the connection area between the transition ring and the heat exchange tube is large and the connection is relatively stable; the sealing between the transition ring and the heat exchange tube is good, and the heat exchange medium is not easy to overflow from between the transition ring and the heat exchange tube.

[0013] In some embodiments, the first concave-convex structure includes a plurality of first protrusions protruding from the first outer wall surface, and a first recess is formed between adjacent first protrusions. The second concave-convex structure includes a second recess engaging with the first protrusions and a second protrusion engaging with the first recess.

[0014] By adopting the above technical solution, the first concave-convex structure and the second concave-convex structure are engaged and connected, which can effectively improve the connection area and connection stability between the heat exchange tube and the transition collar.

[0015] In some embodiments, the heat exchange tube extends along a first direction, each first protrusion extends along a second direction, a plurality of first protrusions are arranged sequentially along the first direction, and the second direction intersects with the first direction.

[0016] By adopting the above technical solution, the first concave-convex structure includes multiple first protrusions, and the first concave-convex structure is easy to manufacture.

[0017] In some embodiments, the first protrusion has a first side surface and a second side surface that are distributed opposite to each other along a first direction, the first side surface and the second side surface are inclined relative to the first outer wall surface, and the first side surface and the second side surface are close to each other along a direction away from the first outer wall surface.

[0018] By adopting the above technical solution, the distribution density of the first protrusion is increased, and the connection area between the transition ring and the heat exchange tube is further increased, which is conducive to further shortening the length of the transition ring and the sealing component.

[0019] In some embodiments, the first outer wall surface includes two heat exchange surfaces and two connecting surfaces arranged opposite each other, the heat exchange surfaces are arranged facing the battery cell assembly, and each connecting surface is connected between the two heat exchange surfaces; a first concave-convex structure is provided on at least one heat exchange surface.

[0020] By adopting the above technical solution, the first concave-convex structure is provided on at least one heat exchange surface, which facilitates the fabrication of the first concave-convex structure on the surface of the heat exchange tube and reduces the manufacturing cost of the heat exchange tube.

[0021] In some embodiments, the heat management component for the current collector further includes a conductive element that is snapped into at least one of the current collector and the adapter collar, and the conductive element connects the heat exchange tube and the housing.

[0022] By adopting the above technical solution, the conductive component can be connected to both the heat exchange tube and the housing simultaneously, thereby reducing the potential difference between the heat exchange tube and the housing, so as to achieve equipotential connection between the heat exchange tube and the housing, and improve the reliability of the battery device.

[0023] In some embodiments, a slot is provided on one side of the adapter collar; the conductive element includes a conductive body and a bent portion connected to the conductive body, the conductive body is partially held in the slot, the conductive body is used for electrical connection with the housing, and the bent portion bends from the conductive body toward the heat exchange tube and abuts against the heat exchange tube.

[0024] By adopting the above technical solution, the conductive component is fixed to the adapter collar by snap-fit, making it difficult for the conductive component to fall off; the bent part bends from the conductive body toward the heat exchange tube, which facilitates the connection of the bent part to the heat exchange tube.

[0025] In some embodiments, the bent portion is interference-fitted with the connecting surface.

[0026] By adopting the above technical solution, the connection reliability between the bending part and the connecting surface is high, which improves the reliability of the equipotential connection; the conductive part is located on the outside of the current collector, which does not affect the sealing performance of the thermal management component; the bending part does not block the heat exchange surface, and the heat exchange surface can fit into the battery cell assembly to obtain a better thermal management effect.

[0027] In some embodiments, the heat exchange tube is a metal part, the adapter collar is a plastic part, and the adapter collar is integrally injection molded to the end of the heat exchange tube.

[0028] By adopting the above technical solution, the transition collar can tightly wrap around the heat exchange tube, resulting in good sealing performance; the first inner wall surface of the transition collar forms a second concave-convex structure that matches and connects with the first concave-convex structure, thereby improving the connection area and connection stability between the transition collar and the heat exchange tube.

[0029] In some embodiments, the adapter collar is welded to or glued to the end of the heat exchange tube.

[0030] By adopting the above technical solutions, the adapter collar can be sealed and connected to the heat exchange tube in a variety of ways.

[0031] In some embodiments, the manifold and the adapter collar are plastic parts, and the manifold and the adapter collar are welded or glued together.

[0032] By adopting the above technical solution, both the manifold and the adapter collar are plastic parts, and the two can be sealed together by welding or adhesive bonding, resulting in good connection stability.

[0033] In some embodiments, the number of thermal management components is multiple, and the battery cell assembly is placed between two adjacent thermal management components.

[0034] In this way, the thermal management components can regulate the temperature of adjacent battery cells, and the thermal management effect of the battery device is better.

[0035] An embodiment of the second aspect of this application provides an electrical device including a battery device as described in the first aspect, the battery device being used to provide electrical energy.

[0036] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 is a structural schematic diagram of a vehicle provided in an embodiment of this application;

[0039] Figure 2 is a schematic diagram of the structure of a battery device provided in an embodiment of this application;

[0040] Figure 3 is a three-dimensional exploded view of a battery cell provided in an embodiment of this application;

[0041] Figure 4 is a partial schematic diagram of a battery device provided in an embodiment of this application;

[0042] Figure 5 is a magnified view of part A in Figure 4;

[0043] Figure 6 is an exploded perspective view of a thermal management component provided in an embodiment of this application;

[0044] Figure 7 is a partial enlarged view of part B in Figure 6;

[0045] Figure 8 is a front view of the thermal management component shown in Figure 6;

[0046] Figure 9 is a cross-sectional view of the thermal management component shown in Figure 8 along line CC;

[0047] Figure 10 is a schematic diagram of the thermal management components and conductive foam in the battery device shown in Figure 4;

[0048] Figure 11 is a three-dimensional schematic diagram of the conductive sheet in the thermal management component shown in Figure 10.

[0049] The markings in the diagram represent the following: 1000, Vehicle; 100, Battery Unit; 200, Controller; 300, Motor; 10, Housing; 11, Upper Housing; 12, Lower Housing; 13, Conductive Foam; 20, Battery Cell Assembly; 21, Battery Cell; 211, Housing; 212, End Cap; 213, Electrode Assembly; 214, Electrode Terminal; 215, Pressure Relief Mechanism; 30, Thermal Management Component; 31, Heat Exchanger Tube; 301, Heat Exchanger Channel; 311, First Outer Wall Surface; 3111, Heat Exchanger Surface; 3112, Connecting Surface; 312, First Concave-convex Structure; 3121, First Protrusion; 3122, First Recess; 3121 a. First side surface; 3121b. Second side surface; 32. Current collector; 321. Current collector; 322. Adapter collar; 3221. Slot; 3222. First inner wall surface; 3223. Second concave-convex structure; 3223a. Second recess; 3223b. Second protrusion; 323. Sealing component; 33. Conductive component; 331. Conductive body; 3311. Second limiting part; 332. Bending part; 3321. First section; 3322. Second section. Embodiments of the present invention

[0050] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein 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 specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0052] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0053] In this document, the term "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 throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0054] 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.

[0055] 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).

[0056] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0057] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0058] The battery cell can 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 the embodiments of this application are not limited to this.

[0059] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0060] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0061] 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.

[0062] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0063] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0064] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0065] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as other fields. With the continuous expansion of the application areas of power batteries, the market demand is also constantly increasing.

[0066] A battery typically consists of individual battery cells and a casing. The battery cells are placed inside the casing, which provides space for them and offers some protection. The individual battery cells are the components where the actual electrochemical reactions occur.

[0067] When an electrochemical reaction occurs inside a battery cell, heat is generated. As the battery is cycled, the cells continuously generate heat, causing the internal temperature of the battery to gradually rise and affecting its performance. Therefore, thermal management components are typically installed inside the battery to cool it down or heat it up in low-temperature environments to bring it back to its normal operating temperature range.

[0068] Currently, some thermal management components use adapters at the ends of heat exchange tubes to seal the current collector to the adapter, thus connecting the current collector to the heat exchange tube. To improve connection stability, the connection length between the adapter and the heat exchange tube is relatively long. Correspondingly, the length of the sealing element within the heat exchange channel is usually greater than the length of the adapter to support the end of the heat exchange tube. However, if the sealing element is too long, it will be positioned directly opposite the battery cell. During charging and discharging, the battery cell expands and experiences high surface pressure. The sealing element may compress the battery cell, increasing the risk of lithium plating.

[0069] Based on the above considerations, one or more embodiments of this application provide a thermal management component, which includes a heat exchange tube and a current collector. The current collector includes a current collector, an adapter ring, and a sealing element. The adapter ring is sealed and fitted onto the end of the heat exchange tube, and the current collector is sealed and connected to the end of the heat exchange tube through the adapter ring. By providing a first concave-convex structure at the end of the heat exchange tube, the connection area between the adapter ring and the heat exchange tube is increased, which helps to shorten the length of the adapter ring. Correspondingly, it helps to shorten the length of the sealing element, so that the sealing element can avoid the battery cells and reduce the risk of lithium plating in the battery cells.

[0070] 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. For ease of explanation, the following embodiments use a vehicle as an example of an electrical device according to one embodiment of this application.

[0071] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft. For ease of explanation, the following embodiments use a vehicle as an example of an electrical device according to an embodiment of this application.

[0072] Please refer to Figure 1, which is a structural schematic diagram of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 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 1000 during startup, navigation, and driving.

[0073] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0074] Referring to Figures 1 and 2, the battery device 100 includes a housing 10 and a battery cell assembly 20. The housing 10 includes an upper housing 11 and a lower housing 12, which overlap each other, defining a space for accommodating the battery cells. The lower housing 12 can be a hollow structure with one open end, while the upper housing 11 can be a plate-like structure, covering the open side of the lower housing 12 so that the upper housing 11 and lower housing 12 together define the accommodating space. Alternatively, both the upper housing 11 and lower housing 12 can be hollow structures with one open end, with the open side of the upper housing 11 covering the open side of the lower housing 12. Of course, the housing 10 formed by the upper housing 11 and lower housing 12 can be of various shapes, such as a cylinder or a cuboid.

[0075] Referring to Figure 2, the battery cell assembly 20 is typically formed by arranging multiple battery cells. The battery device 100 also includes a thermal management component 30, which is a component disposed within the housing 10 of the battery device 100 and used to contain a heat exchange medium to regulate the temperature of the battery cell assembly 20 within the housing 10. During the cycling process, the battery cell assembly 20 generates heat, which can be cooled by the thermal management component 30. In this case, the thermal management component 30 can contain the heat exchange medium; it can also be referred to as a cooling element, cooling system, cooling plate, or liquid cooling plate, etc. Of course, in some other cases, the thermal management component 30 can also be used to heat the battery cell assembly 20, which will not be elaborated here.

[0076] Referring to Figures 2 and 3, the battery cell assembly 20 includes a plurality of battery cells 21 arranged in sequence. The battery cell 21 is the smallest unit that makes up the battery device 100. The battery cell 21 includes a housing 211, an end cap 212, an electrode assembly 213, and other functional components.

[0077] End cap 212 refers to a component that covers the opening of housing 211 to isolate the internal environment of battery cell 21 from the external environment. The shape of end cap 212 can be adapted to the shape of housing 211 to fit it. Optionally, end cap 212 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 212 is not easily deformed under pressure and impact, giving battery cell 21 higher structural strength and improved reliability. Functional components such as electrode terminals 214 and pressure relief mechanism 215 can be provided on end cap 212. Electrode terminals 214 can be used for electrical connection with electrode assembly 213 for outputting or inputting electrical energy to battery cell 21. In some embodiments, pressure relief mechanism 215 is used to release internal pressure when the internal pressure or temperature of battery cell 21 reaches a threshold. The material of end cap 212 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose special limitations on this. In some embodiments, an insulating element may also be provided on the inner side of the end cap 212 to reduce the risk of short circuit. For example, the insulating element may be made of plastic, rubber, etc.

[0078] The housing 211 is a component used to cooperate with the end cap 212 to form the internal environment of the battery cell 21. This internal environment can accommodate the electrode assembly 213, electrolyte, and other components. The housing 211 and the end cap 212 can be independent components. An opening can be provided on the housing 211, and the end cap 212 can be used to close the opening to form the internal environment of the battery cell 21. Alternatively, the end cap 212 and the housing 211 can be integrated. Specifically, the end cap 212 and the housing 211 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 211, the end cap 212 closes the housing 211. The housing 211 can have various shapes and sizes, such as cuboid, cylindrical, or hexagonal prism. Specifically, the shape of the housing 211 can be determined according to the specific shape and size of the electrode assembly 213. The material of the housing 211 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, or plastic. This application embodiment does not impose any special limitations on this.

[0079] Electrode assembly 213 is the component in the battery cell 21 where the electrochemical reaction occurs. The casing 211 may contain one or more electrode assemblies 213. The electrode assembly 213 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 213, while the portions of the positive and negative electrode sheets without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery device 100, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals 214 to form a current loop.

[0080] In some embodiments, a pressure relief mechanism 215 is provided on one side of the battery cell 21. The pressure relief mechanism 215 is an element or component that is actuated to release internal pressure when the internal pressure or temperature of the battery cell 21 reaches a predetermined threshold. The threshold design varies depending on design requirements. The threshold may depend on one or more materials of the positive electrode, negative electrode, electrolyte, and separator in the battery cell 21. The internal pressure of the battery cell 21 is the pressure inside the casing 211. The pressure relief mechanism 215 may take the form of an explosion-proof valve, a gas valve, a pressure relief valve, or a safety valve, and may specifically adopt a pressure-sensitive element or structure. That is, when the internal pressure of the battery cell 21 reaches the predetermined threshold, the pressure relief mechanism 215 performs an action or a weak part provided in the pressure relief mechanism 215 ruptures, thereby forming an opening or channel for releasing internal pressure.

[0081] Referring to Figures 2, 4, and 6 to 9, an embodiment of the first aspect of this application provides a battery device 100, including a housing 10, a battery cell assembly 20 disposed within the housing 10, and a thermal management component 30. The thermal management component 30 is used for heat exchange with the battery cell assembly 20. The thermal management component 30 includes a heat exchange pipe 31 and a current collector 32. The heat exchange pipe 31 has multiple heat exchange channels 301, and the end of the heat exchange pipe 31 has a first concave-convex structure 312. Component 32 includes a collector 321, a transition collar 322, and a sealing member 323. The transition collar 322 is sealed and fitted onto the end of the heat exchange tube 31. The transition collar 322 is connected to the first concave-convex structure 312. The sealing member 323 is located at at least one heat exchange channel 301 near the port of the transition collar 322 and supports the heat exchange tube 31. The collector 321 is sealed and connected to the transition collar 322 so that the heat exchange medium can flow between the heat exchange channel 301 and the collector 321.

[0082] The housing 10 is used to house the battery cell assembly 20 and the thermal management component 30, and the number of battery cell assemblies 20 and thermal management components 30 can be multiple.

[0083] The heat exchange tube 31 can have a conventional shape such as circular, rectangular, or elliptical, or other irregular shapes. Multiple heat exchange channels 301 are provided within the heat exchange tube 31, providing a flow path for the heat exchange medium. The heat exchange tube 31 is fitted onto the surface of the battery cell assembly 20. When the heat exchange medium flows through the heat exchange channels 301, it can exchange heat with the battery cell assembly 20. The heat exchange medium can be water, air, coolant, etc.

[0084] In some embodiments, the heat exchange tube 31 can be a flat tube, and multiple heat exchange channels 301 can be arranged in parallel. When the heat exchange tube 31 is applied to the battery device 100, the surface of the heat exchange tube 31 can be used to contact the battery cell assembly 20, so that the heat exchange tube 31 provides a stable support effect for the battery cell assembly 20.

[0085] In some embodiments, both ends of the heat exchange tube 31 are provided with a collector 32, which is connected to the heat exchange channel 301. The heat exchange medium can circulate unidirectionally within the heat exchange tube 31, that is, the heat exchange medium can enter from the collector 32 at one end of the heat exchange tube 31 and then directly exit from the collector 32 at the other end of the heat exchange tube 31. Of course, the heat exchange medium can also circulate repeatedly within the heat exchange tube 31 before being discharged through a collector 32.

[0086] The manifold component 32 includes a collector 321, an adapter collar 322, and a sealing component 323. The large size of the heat exchange tube 31 poses a risk of unevenness at its end face. If the collector 321 is directly connected to the heat exchange tube 31, poor contact at the connection surface may occur, affecting the connection stability between the collector 321 and the heat exchange tube 31. The thermal management component 30 provided in this embodiment seals the collector 321 and the adapter collar 322, ensuring a tight fit and improving the connection stability between the collector 321 and the heat exchange tube 31, as well as the sealing reliability of the thermal management component 30.

[0087] The adapter collar 322 is sealed on the end of the heat exchange tube 31. The adapter collar 322 can be integrally connected to the heat exchange tube 31 by injection molding or other means, or it can be connected by welding or adhesive.

[0088] The current collector 321 is used for collecting liquid. The current collector 321 is sealed to the adapter ring 322, thereby achieving a sealed connection between the current collector 321 and the heat exchange tube 31 through the adapter ring 322. The current collector 321 and the adapter ring 322 can be fixedly connected by welding, adhesive bonding, or other methods.

[0089] A sealing element 323 is disposed at at least one port of the heat exchange channel 301 near the transition ring 322. The sealing element 323 can both block part of the heat exchange channel 301 and support the heat exchange tube 31. Thus, during the connection of the transition ring 322 and the heat exchange tube 31, the heat exchange tube 31 is less prone to deformation under the support of the sealing element 323. To achieve a better supporting effect, the length of the sealing element 323 is greater than the length of the transition ring 322 along the extension direction of the heat exchange tube 31. The sealing element 323 can be an integral structure or a separate structure corresponding to each heat exchange channel 301.

[0090] The sealing element 323 can be fixed to the heat exchange channel 301 by welding, snap-fitting, or other methods. Optionally, some sealing elements 323 are provided with through holes for the heat exchange medium. The heat exchange channel 301 blocked by the sealing element 323 is not connected to the current collector 321, while the other heat exchange channels 301 can be connected to the current collector 321. On the one hand, this reduces the weight of the heat exchange medium in the heat exchange tube 31, and on the other hand, the blocked heat exchange channels 301 reduce the weight of the heat exchange tube 31 itself, which is beneficial to improving the weight energy density of the battery device 100.

[0091] The heat exchange tube 31 has a first concave-convex structure 312 at its end, which is located on the portion of the heat exchange tube 31 used to connect the adapter ring 322. The first concave-convex structure 312 may include one or more protrusions / recesses. Thus, the adapter ring 322 is connected to the end of the heat exchange tube 31 and covers the first concave-convex structure 312, increasing the connection area between the adapter ring 322 and the heat exchange tube 31. This helps to shorten the length of the adapter ring 322, and correspondingly, it helps to shorten the length of the sealing member 323, allowing the sealing member 323 to avoid the battery cell 21, reducing the risk of lithium plating in the battery cell 21 due to the sealing member 323 squeezing the battery cell 21.

[0092] When manufacturing the thermal management component 30, the sealing component 323 is first placed at the port of at least one heat exchange channel 301, and then the adapter ring 322 is fitted onto the end of the heat exchange tube 31, and the adapter ring 322 is connected to the heat exchange tube 31 and the first concave-convex structure 312 on the heat exchange tube 31. Then the collector 321 is connected to the adapter ring 322.

[0093] In the battery device 100 provided in this application embodiment, the thermal management component 30 includes a heat exchange tube 31 and a current collector 32. The current collector 32 includes a current collector 321, a connecting collar 322, and a sealing component 323. The connecting collar 322 is sealed and fitted onto the end of the heat exchange tube 31. The current collector 321 is connected to the end of the heat exchange tube 31 through the connecting collar 322, thereby improving the connection stability and sealing reliability between the current collector 321 and the heat exchange tube 31. Since the end of the heat exchange tube 31 is provided with a first concave-convex structure 312, the connecting collar 322 is sealed and connected to the first concave-convex structure 312. The provision of the first concave-convex structure 312 increases the connection area between the heat exchange tube 31 and the connecting collar 322. Thus, the thermal management component 30 can shorten the length of the connecting collar 322 and the length of the sealing component 323, reducing the risk of lithium plating in the battery cell 21 caused by the sealing component 323 being directly opposite the battery cell 21.

[0094] In some embodiments, the heat exchange tube 31 has a first outer wall surface 311, the transition collar 322 has a first inner wall surface 3222, the first concave-convex structure 312 is disposed on the first outer wall surface 311, and the first inner wall surface 3222 is connected to the first concave-convex structure 312.

[0095] The heat exchange tube 31 has a first outer wall surface 311, and a first concave-convex structure 312 is disposed on the first outer wall surface 311. The first concave-convex structure 312 can be directly fabricated on the first outer wall surface 311, that is, the first concave-convex structure 312 and the heat exchange tube 31 are integrally formed. In other embodiments, the first concave-convex structure 312 can also be prefabricated and connected to the first outer wall surface 311.

[0096] The adapter collar 322 is generally annular and has a first inner wall surface 3222. The adapter collar 322 is sleeved on the end of the heat exchange tube 31, and the first inner wall surface 3222 is sealed to the first outer wall surface 311, and the first inner wall surface 3222 is engaged with the first concave-convex structure 312.

[0097] By adopting the above technical solution, the first inner wall surface 3222 of the transition collar 322 is connected to the first concave-convex structure 312, which increases the connection area between the transition collar 322 and the heat exchange tube 31, and helps to shorten the length of the transition collar 322.

[0098] In some embodiments, the first inner wall surface 3222 has a second concave-convex structure 3223, which is engaged with the first concave-convex structure 312.

[0099] The second concave-convex structure 3223 engages with the first concave-convex structure 312, enabling the transition collar 322 to be sealed to the heat exchange tube 31. On the one hand, the connection area between the transition collar 322 and the heat exchange tube 31 is large and the connection is relatively stable. On the other hand, the sealing performance between the transition collar 322 and the heat exchange tube 31 is good, and the heat exchange medium is not easy to overflow from between the transition collar 322 and the heat exchange tube 31.

[0100] Referring to Figures 6 to 9, in some embodiments, the first concave-convex structure 312 includes a plurality of first protrusions 3121 protruding from the first outer wall surface 311, and a first recess 3122 is formed between adjacent first protrusions 3121. The second concave-convex structure 3223 includes a second recess 3223a that engages with the first protrusions 3121 and a second protrusion 3223b that engages with the first recess 3122.

[0101] The first protrusion 3121 is a structure that protrudes from the surface of the heat exchange tube 31. The first protrusion 3121 can be of various shapes, such as dot-shaped, column-shaped, strip-shaped, cone-shaped, etc. A first recess 3122 is formed between adjacent first protrusions 3121. The first recess 3122 is a structure that is recessed from the first protrusion 3121. The first recess 3122 can be a gap between adjacent first protrusions 3121, or it can be a structure recessed on the surface of the heat exchange tube 31.

[0102] The second concave-convex structure 3223 includes a second concave portion 3223a and a second protruding portion 3223b, so that the second concave-convex structure 3223 can be engaged and connected with the first concave-convex structure 312.

[0103] By adopting the above technical solution, the first concave-convex structure 312 and the second concave-convex structure 3223 are engaged and connected, which can effectively improve the connection area and connection stability of the heat exchange tube 31 and the transition collar 322.

[0104] Please refer to Figures 6 to 9. In some embodiments, the heat exchange tube 31 extends along the first direction X, each first protrusion 3121 extends along the second direction Z, and a plurality of first protrusions 3121 are arranged sequentially along the first direction X, and the second direction Z intersects with the first direction X.

[0105] The heat exchange tube 31 can be a flat tube extending along the first direction X, and the first protrusion 3121 extends along the second direction Z, that is, the first protrusion 3121 is generally elongated, wherein the second direction Z can also be perpendicular to the first direction X or intersect at other angles.

[0106] Multiple first protrusions 3121 are arranged sequentially along the first direction X, and the adapter collar 322 covers the multiple first protrusions 3121. In this way, the adapter collar 322 can fit and seal with the first concave-convex structure 312.

[0107] By adopting the above technical solution, the first concave-convex structure 312 includes a plurality of first protrusions 3121, and the first concave-convex structure 312 is easy to manufacture; the adapter collar 322 covers the plurality of first protrusions 3121, effectively increasing the connection area between the adapter collar 322 and the heat exchange tube 31, and at the same time improving the connection stability between the adapter collar 322 and the heat exchange tube 31.

[0108] In some embodiments, as shown in FIG7, the first protrusion 3121 has a first side surface 3121a and a second side surface 3121b that are distributed opposite to each other along a first direction X. The first side surface 3121a and the second side surface 3121b are inclined relative to the first outer wall surface 311, and the first side surface 3121a and the second side surface 3121b move closer to each other along a direction away from the first outer wall surface 311.

[0109] For example, the first protrusion 3121 may be fin-shaped, and multiple first protrusions 3121 are connected in sequence, with a relatively high distribution density of the first protrusions 3121.

[0110] Both the first side surface 3121a and the second side surface 3121b are inclined relative to the first outer wall surface 311 and are close to each other along the direction away from the first outer wall surface 311, so that the width of the first protrusion 3121 away from the heat exchange tube 31 is smaller than the width of the first protrusion 3121 near the heat exchange tube 31. A gap is formed between two adjacent first protrusions 3121, which is the first recess 3122. The sides of two adjacent first protrusions 3121 near the heat exchange tube 31 can be connected to each other, which increases the distribution density of the first protrusions 3121.

[0111] The first concave-convex structure 312 provided in this application embodiment has a simple structure and the first protrusion 3121 is easy to manufacture on the surface of the heat exchange tube 31; the gap between adjacent first protrusions 3121 forms a first concave portion 3122, so that multiple first protrusions 3121 can be connected in sequence, which increases the distribution density of the first protrusions 3121, further increases the connection area between the adapter ring 322 and the heat exchange tube 31, and is conducive to further shortening the length of the adapter ring 322 and the sealing member 323.

[0112] Referring to Figures 4 and 6, in some embodiments, the first outer wall surface 311 includes two heat exchange surfaces 3111 and two connecting surfaces 3112 arranged opposite to each other. The heat exchange surfaces 3111 are arranged directly opposite to the battery cell assembly 20, and each connecting surface 3112 is connected between the two heat exchange surfaces 3111. The first concave-convex structure 312 is provided on at least one heat exchange surface 3111.

[0113] The heat exchange surface 3111 can be a plane, and the connecting surface 3112 can be a plane, an arc-shaped surface, etc. The area of ​​the heat exchange surface 3111 is larger than the area of ​​the connecting surface 3112. The heat exchange surface 3111 can be fixedly connected to the large surface of the battery cell by means of bonding or other methods to achieve better thermal management. The first protrusion structure is provided on at least one heat exchange surface 3111, which can increase the connection area between the adapter ring 322 and the heat exchange tube 31.

[0114] By adopting the above technical solution, the first concave-convex structure 312 is provided on at least one heat exchange surface 3111, which makes it convenient to make the first concave-convex structure 312 on the surface of the heat exchange tube 31, and the manufacturing cost of the heat exchange tube 31 is low.

[0115] Referring to Figures 5, 10, and 11, in some embodiments, the thermal management component 30 further includes a conductive element 33, which is snapped into at least one of the current collector 321 and the adapter collar 322. The conductive element 33 connects the heat exchange tube and the housing.

[0116] The conductive component 33 is a component with electrical conductivity. In some embodiments, the conductive component 33 is a metal component, and the material of the conductive component 33 can be various metals, such as copper, silver, gold, aluminum, and other metals with good electrical conductivity; the conductive component 33 can also be a conductive plastic component, a metal-plastic composite component, etc. The conductive component 33 can be a sheet, a block, or other shapes.

[0117] For example, the conductive element 33 is snapped onto the adapter collar 322, and the two ends of the conductive element 33 are electrically connected to the heat exchange tube 31 and the housing 10, respectively. In other embodiments, the conductive element 33 may also be snapped onto the current collector 321, or simultaneously snapped onto the adapter collar 322 and the current collector 321, so that the conductive element 33 is fixedly disposed relative to the current collector 32, so that the conductive element 33 can be stably electrically connected between the heat exchange tube 31 and the housing 10.

[0118] The conductive element 33 connects the heat exchange tube 31 and the housing 10. Since the conductive element 33 is made of conductive material, it is not only structurally connected to the heat exchange tube 31 and the housing 10, but also electrically connected to the heat exchange tube 31 and the housing 10. That is, the conductive element 33 is in electrical contact with the heat exchange tube 31 and the housing 10. In this way, the conductive element 33 can be electrically connected to the heat exchange tube 31 and the housing 10.

[0119] For example, one end of the conductive element 33 is connected to the heat exchange tube 31. The conductive element 33 can directly contact the outer or inner surface of the heat exchange tube 31, or it can abut against any surface of the heat exchange tube 31 and be electrically connected to the heat exchange tube 31 through conductive elements such as conductive foam. The other end of the conductive element 33 is connected to the housing 10. The conductive element 33 can directly contact the inner wall of the housing 10, the beams in the housing 10, or be electrically connected to the housing 10 through conductive elements such as conductive foam 13. In this way, the conductive element 33 can electrically connect the heat exchange tube 31 to the housing 10, thereby reducing the potential difference between the heat exchange tube 31 and the housing, so as to achieve equipotential bonding between the heat exchange tube 31 and the housing 10. Equipotential bonding, or potential equalization, can reduce the risk of electric shock and other safety hazards.

[0120] By providing a conductive element 33 in the thermal management component 30, the conductive element 33 can be connected to both the heat exchange tube 31 and the housing 10 simultaneously, thereby reducing the potential difference between the heat exchange tube 31 and the housing 10, so as to achieve equipotential connection between the heat exchange tube 31 and the housing 10, and improving the reliability of the battery device 100.

[0121] In some embodiments, a slot 3221 is provided on one side of the adapter collar 322; the conductive element 33 includes a conductive body 331 and a bent portion 332 connected to the conductive body 331. The conductive body 331 is partially held in the slot 3221. The conductive body 331 is used to electrically connect with the housing 10. The bent portion 332 bends from the conductive body 331 toward the heat exchange tube 31 and abuts against the heat exchange tube 31.

[0122] The slot 3221 can be a blind slot or a through slot formed on the adapter collar 322. The conductive element 33 can be a sheet, with the conductive body 331 partially held in the slot 3221, so that the conductive element 33 can be fixed to the current collector 32 by snap-fit. The conductive body 331 is used to connect to the housing 10 and is electrically connected to the housing 10. Optionally, the conductive body 331 extends to the outer surface of the current collector 321 to provide a larger connection area between the conductive body 331 and the housing 10. The bent portion 332 bends from the conductive body 331 toward the heat exchange tube 31, so that the bent portion 332 can abut against the heat exchange tube 31 and be electrically connected to the heat exchange tube 31. In this embodiment, the bent portion 332 is directly attached to the heat exchange tube 31 with an interference fit, resulting in a relatively stable connection.

[0123] As shown in Figures 10 and 11, the conductive body 331 is provided with a second limiting part 3311, which can be engaged with the first limiting part in the slot 3221; optionally, the second limiting part 3311 can be a holding hole.

[0124] By adopting the above technical solution, the conductive component 33 includes a conductive body 331 and a bending portion 332. By holding the conductive body 331 in the slot 3221 of the adapter collar 322, the conductive component 33 can be fixed on the current collector 32 by snap-fit, and the conductive component 33 is not easy to fall off. The bending portion 332 bends from the conductive body 331 toward the heat exchange tube 31, which facilitates the connection of the bending portion 332 to the heat exchange tube 31.

[0125] In some embodiments, the bent portion 332 is interference-fitted with the connecting surface 3112.

[0126] The slot 3221 is recessed on the side of the adapter collar 322 near the connecting surface 3112. The conductive body 331 is snapped into the slot 3221, and the bent part 332 fits against the connecting surface 3112. Optionally, the two connecting surfaces 3112 of the heat exchange tube 31 face the top cover and bottom wall of the housing 10, respectively. The conductive element 33 is located on the side of the heat exchange tube 31 near the bottom wall to facilitate the electrical connection of the conductive element 33 to the housing 10.

[0127] The bending portion 332 is a bent structure comprising a first section 3321 and a second section 3322. One end of the first section 3321 is perpendicularly connected to the conductive body 331, and the other end of the first section 3321 is perpendicularly connected to the second section 3322. The second section 3322 abuts against the heat exchange tube 31. By setting the length of the second section 3322, the connection surface between the second section 3322 and the heat exchange tube 31 is made to be interference-fitted.

[0128] When installing the conductive component 33, it is inserted into the slot 3221, so that the second section 3322 of the bent portion 332 is interference-fitted with the surface of the heat exchange tube 31, thus achieving a tight fit between the conductive component 33 and the heat exchange tube 31, resulting in a relatively stable connection. It is understood that the conductive body 331 can also achieve an interference-fit connection with the heat exchange tube 31 through other methods.

[0129] By adopting the above technical solution, the bending part 332 and the connecting surface 3112 are interference-fitted, and the connection between the two has high reliability, which improves the reliability of the equipotential connection; the conductive part 33 is located on the outside of the current collector 32, which does not affect the sealing performance of the thermal management component 30; the bending part 332 does not block the heat exchange surface 3111, and the heat exchange surface 3111 can fit into the battery cell assembly to obtain a better thermal management effect.

[0130] In other embodiments, the bent portion 332 may also be attached to the heat exchange surface 3111.

[0131] In some embodiments, the inner surface of the housing 10 is provided with conductive foam 13 (not shown), and the conductive component 33 contacts the conductive foam 13.

[0132] Conductive foam 13 can be disposed on the bottom surface, inner surface, side beams, or other beam surfaces of the housing 10. The conductive component 33 contacts the conductive foam 13 to achieve electrical connection with the housing 10 through the conductive foam 13. The conductive foam 13 provides a certain degree of elastic pre-tension, allowing the conductive foam 13 to be compressed when the conductive component 33 abuts against it. This facilitates a stable connection between the current collector 32 and the housing 10, improving the reliability of electrical conductivity between the current collector 32 and the housing 10.

[0133] In some embodiments, the position and height of the conductive foam 13 can be set according to the position and installation height of the conductive component 33, thereby improving the flexibility of the conductive component 33 in setting.

[0134] In some embodiments, the heat exchange tube 31 is a metal part, the adapter collar 322 is a plastic part, and the adapter collar 322 is integrally injection molded to the end of the heat exchange tube 31.

[0135] The heat exchange tube 31 is a metal part. The transition collar 322 and the heat exchange tube 31 can be integrally connected by injection molding. That is, during the injection molding process, the heat exchange tube 31 is used as an embedded part, and the transition collar 322 is formed on the first outer wall surface 311 of the heat exchange tube 31, so that the first inner wall surface 3222 of the transition collar 322 is tightly combined with the first outer wall surface 311 of the heat exchange tube 31.

[0136] Since the first concave-convex structure 312 is pre-fabricated on the heat exchange tube 31, after the transition collar 322 is injection molded onto the heat exchange tube 31, the first inner wall surface 3222 of the transition collar 322 forms a second concave-convex structure 3223 that is connected to the first concave-convex structure 312.

[0137] By setting the adapter collar 322 as a plastic part integrally connected with the heat exchange tube 31, on the one hand, the adapter collar 322 can tightly cover the heat exchange tube 31, and the sealing performance is good; on the other hand, the first inner wall surface 3222 of the adapter collar 322 forms a second concave-convex structure 3223 that cooperates with the first concave-convex structure 312, which improves the connection area and connection stability between the adapter collar 322 and the heat exchange tube 31.

[0138] In other embodiments, the adapter collar 322 is welded or glued to the end of the heat exchange tube 31.

[0139] The adapter collar 322 can also be welded to the heat exchange tube 31 by means of laser welding or other methods. In this case, the first inner wall surface 3222 and the first outer wall surface 311 can be welded together. The adapter collar 322 can also be fixed to the heat exchange tube 31 by adhesive, that is, the first inner wall surface 3222 and the first outer wall surface 311 are glued together.

[0140] By adopting the above technical solution, the adapter collar 322 can be sealed and connected to the heat exchange tube 31 in a variety of ways. The end of the heat exchange tube 31 is provided with a first concave-convex structure 312. The first inner wall surface 3222 of the adapter collar 322 can be sealed and connected with the first concave-convex structure 312, and the connection is relatively stable.

[0141] In some embodiments, the current collector 321 and the adapter collar 322 are plastic parts, and the current collector 321 and the adapter collar 322 are welded or glued together.

[0142] Since both the current collector 321 and the adapter collar 322 are plastic parts, they can be sealed together by welding or adhesive bonding, resulting in good connection stability. Specifically, the current collector 321 and the adapter collar 322 are connected to the side opposite to the heat exchange tube 31. Furthermore, since both the current collector 321 and the adapter collar 322 are plastic parts, and the heat exchange tube 31 is a metal part, the conductive component 33 can connect the heat exchange tube 31 to the housing 10 at the same potential.

[0143] By adopting the above technical solution, both the current collector 321 and the adapter collar 322 are plastic parts, which are easy to connect and have high connection reliability. Furthermore, since both the current collector 321 and the adapter collar 322 are plastic parts, the plastic material is lighter and less expensive, which reduces the weight and cost of the thermal management component 30.

[0144] As shown in Figure 2, in some embodiments, there are multiple thermal management components 30, and the battery cell assembly 20 is placed between two adjacent thermal management components 30.

[0145] Optionally, multiple battery cell modules 20 are arranged in multiple rows, with each row of battery cell modules 20 positioned between two adjacent thermal management components 30. The multiple thermal management components 30 can be interconnected to allow heat exchange medium to flow within them, enabling simultaneous thermal management of multiple rows of battery cell modules 20. In this way, the thermal management components 30 can regulate the temperature of adjacent battery cell modules 20, resulting in better thermal management of the battery device 100.

[0146] Understandably, the outer surface shape of the heat exchange tube 31 can be changed according to the shape of the battery cell assembly 20. For example, if the battery cell 21 is a cuboid, the heat exchange tube 31 can be a straight tube with a plane parallel to the outer surface of the battery cell, and the outer surface of the heat exchange tube 31 contacts the outer surface of the battery cell to effectively increase the contact area. Alternatively, if the battery cell 21 is cylindrical, the heat exchange tube 31 can be wavy to match the shape of the battery cell 21. Of course, the outer surface of the heat exchange tube 31 does not necessarily have to be completely matched and adhered to the outer surface of the battery cell.

[0147] Referring to Figures 2 to 11, some embodiments of this application provide a battery device 100, including a housing 10, a battery cell assembly 20 disposed within the housing 10, and a thermal management component 30. The thermal management component 30 is used for heat exchange with the battery cell assembly 20. The thermal management component 30 includes a heat exchange tube 31 and a current collector 32. The heat exchange tube 31 is provided with a plurality of heat exchange channels 301, and the end of the heat exchange tube 31 is provided with a first concave-convex structure 312. The current collector 32 includes a current collector 321, a connecting collar 322, and a sealing member 323. The connecting collar 322 is sealed and fitted onto the end of the heat exchange tube 31 and is sealed and connected to the first concave-convex structure 312. The sealing member 323 is disposed at at least one heat exchange channel 301 near the port of the connecting collar 322 and supports the heat exchange tube 31. The current collector 321 is sealed and connected to the connecting collar 322 to allow the heat exchange medium to flow between the heat exchange channel 301 and the current collector 321. In some embodiments, the heat exchange tube 31 has a first outer wall surface 311, and the adapter collar 322 has a first inner wall surface 3222, which is integrally connected to the first outer wall surface 311. The first concave-convex structure 312 includes a plurality of first protrusions 3121 arranged in sequence, and a first recess 3122 is formed between adjacent first protrusions 3121. In the battery device 100 provided in this application embodiment, the thermal management component 30 has good connection stability and also reduces the risk of lithium plating in the battery cell 21 due to excessive length of the sealing component 323 in the thermal management component 30.

[0148] An embodiment of the second aspect of this application provides an electrical device including a battery device 100 as provided in the first aspect, the battery device 100 being used to provide electrical energy.

[0149] The power supply device can be any of the aforementioned devices or systems that utilize battery device 100.

[0150] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A battery device, wherein, include: Box; The battery cell assembly is located inside the housing; A thermal management component, disposed within the housing and used for heat exchange with the battery cell assembly, includes a heat exchange tube and a current collector. The heat exchange tube has multiple heat exchange channels, and its end has a first concave-convex structure. The current collector includes a current collector, a connecting collar, and a sealing element. The connecting collar is sealed and fitted onto the end of the heat exchange tube and connected to the first concave-convex structure. The sealing element is disposed at at least one port of the heat exchange channel near the connecting collar and supports the heat exchange tube. The collector is sealed to the adapter collar to allow the heat exchange medium to flow between the heat exchange channel and the collector.

2. The battery device as claimed in claim 1, wherein, The heat exchange tube has a first outer wall surface, the adapter collar has a first inner wall surface, the first concave-convex structure is disposed on the first outer wall surface, and the first inner wall surface is connected to the first concave-convex structure.

3. The battery device as claimed in claim 2, wherein, The first inner wall surface has a second concave-convex structure, which engages with the first concave-convex structure.

4. The battery device as claimed in claim 3, wherein, The first concave-convex structure includes a plurality of first protrusions protruding from the first outer wall surface, and a first recess is formed between adjacent first protrusions. The second concave-convex structure includes a second recess that engages with the first protrusion and a second protrusion that engages with the first recess.

5. The battery device as claimed in claim 4, wherein, The heat exchange tube extends along a first direction, each of the first protrusions extends along a second direction, and a plurality of the first protrusions are arranged sequentially along the first direction, with the second direction intersecting the first direction.

6. The battery device as claimed in claim 5, wherein, The first protrusion has a first side and a second side that are distributed opposite to each other along the first direction. The first side and the second side are inclined relative to the first outer wall surface and move closer to each other along a direction away from the first outer wall surface.

7. The battery device according to any one of claims 2 to 6, wherein, The first outer wall surface includes two heat exchange surfaces and two connecting surfaces arranged opposite each other. The heat exchange surfaces are arranged directly opposite the battery cell assembly, and each connecting surface is connected between the two heat exchange surfaces. The first concave-convex structure is provided on at least one of the heat exchange surfaces.

8. The battery device as claimed in claim 7, wherein, The thermal management component further includes a conductive element, which is snapped into at least one of the current collector and the adapter collar, and the conductive element is electrically connected to the heat exchange tube and the housing.

9. The battery device as claimed in claim 8, wherein, The adapter collar has a slot on one side; the conductive component includes a conductive body and a bent portion connected to the conductive body. The conductive body is partially held in the slot. The conductive body is used to electrically connect with the housing. The bent portion bends from the conductive body toward the heat exchange tube and abuts against the heat exchange tube.

10. The battery device as claimed in claim 9, wherein, The bent portion is interference-fitted with the connecting surface.

11. The battery device according to any one of claims 1 to 6, wherein, The heat exchange tube is a metal part, the adapter collar is a plastic part, and the adapter collar is integrally injection molded to the end of the heat exchange tube.

12. The battery device according to any one of claims 1 to 6, wherein, The adapter collar is welded or glued to the end of the heat exchange tube.

13. The battery device according to any one of claims 1 to 6, wherein, The current collector and the adapter collar are plastic parts, and the current collector and the adapter collar are welded or glued together.

14. The battery device according to any one of claims 1 to 6, wherein, The number of thermal management components is multiple, and the battery cell assembly is placed between two adjacent thermal management components.

15. An electrical appliance, wherein, The battery device includes any one of claims 1 to 14, wherein the battery is used to provide electrical energy.

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