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, and a battery cell assembly and a thermal management component which are provided in the case; the thermal management component is used for exchanging heat with the battery cell assembly, and comprises a heat exchange tube, a fluid collection component, and a conductive member; the heat exchange tube is a metal member and a heat exchange flow channel is provided in the heat exchange tube; the fluid collection component has a fluid collection cavity, and is connected to an end portion of the heat exchange tube; the fluid collection cavity is communicated with the heat exchange flow channel; the conductive member is fixed to the fluid collection component, abuts against and is electrically connected to the heat exchange tube, and is further electrically connected to the case. In the battery device provided in embodiments of the present application, the conductive member can reduce a potential difference between the heat exchange tube and the case, and good reliability of the battery device is achieved.

Description

Battery devices and power-consuming devices

[0001] This application claims priority to Chinese Patent Application No. 202410501046.5, filed on April 24, 2024, entitled "Thermal Management Component and Manufacturing Process Thereof, Battery, and Electrical Device", and to Chinese Patent Application No. 202420869133.1, filed on April 24, 2024, entitled "Thermal Management Component, Battery, and Electrical Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery 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] In the development of battery technology, improving battery reliability is an important research direction. Summary of the Invention

[0005] In view of this, embodiments of this application provide a battery device and an electrical device that can improve the reliability of the battery device.

[0006] An embodiment of the first aspect of this application provides a battery device, including 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, a current collector, and a conductive element. The heat exchange tube is a metal component and has a heat exchange channel inside. The current collector has a current collection cavity and is connected to the end of the heat exchange tube, and the current collection cavity is connected to the heat exchange channel. The conductive element is fixed on the current collector, abuts against the heat exchange tube, and is electrically connected to the heat exchange tube. The conductive element is also electrically connected to the housing.

[0007] In the battery device provided in this application embodiment, the thermal management component includes a heat exchange tube and a current collector. The heat exchange channel in the heat exchange tube is connected to the current collector cavity in the current collector to allow the heat exchange medium to flow between the heat exchange channel and the current collector. The thermal management component can exchange heat with the battery cell assembly, enabling the battery cell assembly to operate at a relatively safe temperature and improving the operational stability of the battery device. The heat exchange tube is a metal component and is electrically connected to the housing through a conductive component to reduce the potential difference between the heat exchange tube and the housing, thereby improving the reliability of the battery device.

[0008] In some embodiments, the flow collector includes a flow collector and a transition sleeve. The flow chamber is disposed in the flow collector, and the transition sleeve is sleeved on the end of the heat exchange tube. The flow collector and the transition sleeve are sealed together to seal and communicate the heat exchange channel and the flow chamber. A conductive element is fixedly connected to at least one of the flow collector and the transition sleeve.

[0009] By adopting the above technical solution, the connection stability between the collector and the heat exchange tube is good, and the sealing reliability of the thermal management components is good; the conductive component is fixedly connected to at least one of the collector and the adapter collar, and the fixing method of the conductive component is more flexible and convenient.

[0010] In some embodiments, a snap-fit ​​hole is provided on one side of the adapter collar; one end of the conductive element is snapped into the snap-fit ​​hole and abuts against the heat exchange tube, and the other end of the conductive element extends to the current collector and is used for electrical connection with the housing.

[0011] By adopting the above technical solution, the conductive component can be fixedly installed relative to the transition collar and the heat exchange tube, so as to facilitate the conductive component abutting against the heat exchange tube.

[0012] In some embodiments, the adapter sleeve has a hollow cavity, the inner wall of the adapter sleeve covers the end of the heat exchange tube, and the snap-fit ​​hole communicates with the hollow cavity; one end of the conductive element is a first contact portion, which is clamped between the inner wall of the adapter sleeve and the heat exchange tube.

[0013] By adopting the above technical solution, the first contact part can be stably fixed on the surface of the heat exchange tube, reducing the risk of the conductive part separating from the heat exchange tube. The heat exchange tube and the housing are electrically connected through the conductive part, which has high reliability.

[0014] In some embodiments, the first contact portion is interference-fitted with the adapter collar and the heat exchange tube.

[0015] By adopting the above technical solution, the first contact part can maintain contact with the heat exchange tube under a certain pressure, and the contact reliability between the conductive part and the heat exchange tube is high.

[0016] In some embodiments, the first contact portion is provided with a protruding structure, which abuts against the transition collar or heat exchange tube.

[0017] By adopting the above technical solution, the first contact part can be installed between the heat exchange tube and the transition collar through an interference fit, which further improves the safety and stability of the conductive component and the contact reliability between the conductive component and the heat exchange tube.

[0018] In some embodiments, the snap-fit ​​hole penetrates the side of the adapter sleeve away from the current collector and the outer wall of the adapter sleeve away from the heat exchange tube; the first contact portion is bent to form a first section and a second section, the first section extends along the side of the adapter sleeve and is snapped in the snap-fit ​​hole, and the second section is sandwiched between the inner wall of the adapter sleeve and the heat exchange tube.

[0019] By adopting the above technical solution, the first contact part is bent to facilitate its insertion into the snap-fit ​​hole; the second section in the first contact part can form a large area of ​​contact with the heat exchange tube, thereby improving the connection reliability between the conductive component and the heat exchange tube.

[0020] In some embodiments, along the extension direction of the heat exchange tube, the length of the portion of the heat exchange tube covered by the transition collar is greater than the length of the second section.

[0021] By adopting the above technical solution, the thermal management component can use the conductive parts snapped onto the adapter collar to conduct heat exchange tubes and housing, while the thermal management component can still maintain good sealing performance.

[0022] In some embodiments, the conductive element further includes a connecting portion and a second contact portion, wherein the first contact portion and the second contact portion are respectively bent and connected to the two ends of the connecting portion, the connecting portion extends on the outer surface of the adapter collar and the current collector, and the second contact portion is fixed to the outer surface of the current collector and is used for electrical connection with the housing.

[0023] By adopting the above technical solution, the first contact part can be snapped onto the adapter collar and electrically connected to the heat exchange tube, and the second contact part can abut against the surface of the collector and electrically connected to the housing. In this way, the conductive part can be fixed on the collector and the equipotential connection between the heat exchange tube and the housing is realized.

[0024] In some embodiments, the adapter collar or current collector is provided with a first limiting part, and the connecting part is provided with a first mating part, and the first mating part is engaged with the first limiting part.

[0025] By adopting the above technical solution, the first limiting part and the first mating part are engaged to limit the conductive part. On the one hand, the conductive part can be installed in place, and on the other hand, the conductive part is not easy to detach from the current collecting component.

[0026] In some embodiments, the current collector is provided with a second limiting part, and the second contact part is provided with a second mating part, and the second mating part engages with the second limiting part.

[0027] By adopting the above technical solution, the second limiting part and the second mating part are engaged, which can limit the conductive part and facilitate the contact of the conductive part with the current collector.

[0028] In some embodiments, the second limiting portion is a limiting groove, the end of the second contact portion is a second mating portion, and the second mating portion is inserted into the limiting groove.

[0029] By adopting the above technical solution, the limiting groove on the current collector can be engaged by the second contact piece to position the conductive component.

[0030] In some embodiments, the current collector includes a first housing portion, a second housing portion, and a connector. The first housing portion is sealed to an adapter collar, the second housing portion is connected to the side of the first housing portion away from the adapter collar, and the connector is connected to the second housing portion. The connecting portion is fixed to the adapter collar and the first housing portion, and the second contact portion is fixed to the second housing portion.

[0031] By adopting the above technical solution, the second contact portion of the conductive component can be adapted to the structure of the current collector and fixed to the surface of the current collector, which is beneficial for the conductive component to be stably connected to the current collector component. Furthermore, the second contact portion can be configured to have a large area to facilitate contact with the housing.

[0032] In some embodiments, the heat exchange tube includes two oppositely arranged heat exchange surfaces and two oppositely arranged connecting surfaces. The heat exchange surfaces are directly opposite to the battery cell assembly. The heat exchange surfaces are planar, and each connecting surface connects the two heat exchange surfaces. One end of the conductive element abuts against the heat exchange surface.

[0033] By adopting the above technical solution, the conductive component abuts against the heat exchange surface of the heat exchange tube, which can achieve planar contact and a large contact area, which is conducive to the stable connection and electrical connection between the conductive component and the heat exchange tube.

[0034] In some embodiments, both the manifold and the adapter collar are plastic parts.

[0035] By adopting the above technical solution, the adapter collar can be wrapped onto the metal heat exchange tube by overmolding, which solves the problem of difficult welding between components of different materials; at the same time, the use of plastic material for the manifold and the adapter collar can reduce weight and cost.

[0036] In some embodiments, the inner surface of the housing is provided with conductive foam, and the conductive component abuts against the conductive foam.

[0037] By adopting the above technical solution, the conductive foam can be compressed, which is beneficial to the stable connection between the current collector and the housing, and improves the reliability of the electrical conductivity between the current collector and the housing.

[0038] In some embodiments, the number of thermal management components is multiple, and the battery cell assembly is placed between two adjacent thermal management components.

[0039] By adopting the above technical solution, the thermal management component can regulate the temperature of adjacent battery cells, and the thermal management effect of the battery device is good.

[0040] An embodiment of the second aspect of this application provides an electrical device including the battery device provided in the first aspect, the battery device being used to provide electrical energy.

[0041] 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, the following are specific embodiments of this application. Attached Figure Description

[0042] 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.

[0043] Figure 1 is a structural schematic diagram of a vehicle provided in an embodiment of this application;

[0044] Figure 2 is a schematic diagram of the structure of a battery device provided in an embodiment of this application;

[0045] Figure 3 is a three-dimensional exploded view of a battery cell provided in an embodiment of this application;

[0046] Figure 4 is a partial schematic diagram of a battery device provided in an embodiment of this application;

[0047] Figure 5 is a magnified view of part A in Figure 4;

[0048] Figure 6 is a three-dimensional schematic diagram of the battery device shown in Figure 4 from another angle;

[0049] Figure 7 is a partial enlarged view of part B in Figure 6;

[0050] Figure 8 is a perspective view of a thermal management component provided in an embodiment of this application;

[0051] Figure 9 is a magnified view of part C in Figure 8;

[0052] Figure 10 is a three-dimensional exploded view of the current collection component and conductive component in the thermal management component shown in Figure 8;

[0053] Figure 11 is a side view of the thermal management component shown in Figure 8;

[0054] Figure 12 is a cross-sectional view of the thermal management component shown in Figure 11 along line DD;

[0055] Figure 13 is a partial enlarged view of part E in the thermal management component shown in Figure 12;

[0056] Figure 14 is a schematic diagram of the conductive component in the thermal management component shown in Figure 8.

[0057] The markings in the diagram mean:

[0058] 1000, Vehicle; 100, Battery Unit; 200, Controller; 300, Motor; 10, Housing; 11, Upper Housing; 12, Lower Housing; 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 Components; 40, Conductive Foam; 31, Heat Exchanger Tube; 311, Heat Exchanger Channel; 312, Heat Exchanger Surface; 313, Connecting Surface; 32, Current Collector; 321, Current Collector; 3211, Current Collector Chamber; 3212, Second Limiting part; 321a, first housing part; 321b, second housing part; 321c, connector; 322, adapter collar; 3221, snap-fit ​​hole; 3222, hollow cavity; 3223, first limiting part; 33, conductive element; 331, first contact part; 331a, first section; 331b, second section; 3311, protruding structure; 332, second contact part; 3321, second mating part; 332a, first fitting section; 332b, second fitting section; 332c, third fitting section; 333, connecting part; 3331, first mating part. Embodiments of the present invention

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0064] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0074] 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.

[0075] 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.

[0076] When an electrochemical reaction occurs inside a battery cell, heat is generated. With repeated use, the battery cells continuously generate heat, causing the internal temperature to gradually rise and affecting battery performance. Therefore, thermal management components are typically installed inside the battery. These components include heat exchange tubes and current collectors. The heat exchange medium flows into the heat exchange tubes through the current collector, or flows out of the thermal management component through the current collector. During its flow within the heat exchange tubes, the heat exchange medium exchanges heat with the battery cells, thereby cooling the battery or heating it up in low-temperature environments to bring it to its normal operating temperature range. However, heat exchange tubes are usually made of metal, posing a risk of electrical conductivity. This can easily create a large potential difference between the heat exchange tubes and the battery casing, increasing the risk of insulation failure within the battery.

[0077] Based on the above considerations, one or more embodiments of this application provide a battery device, including a housing, a battery cell assembly disposed within the housing, and a thermal management component. The thermal management component includes a heat exchange tube, a current collector, and a conductive element. The heat exchange tube is a metal component with a heat exchange channel inside. The current collector has a current collection cavity connected to the end of the heat exchange tube, and the current collection cavity is connected to the heat exchange channel. The conductive element is fixed to the current collector, abuts against the heat exchange tube, and is electrically connected to the heat exchange tube. The conductive element is also electrically connected to the housing. In the above-described battery device, the thermal management component can exchange heat with the battery cell assembly, enabling the battery cell assembly to operate at a relatively safe temperature, thus improving the operational stability of the battery device. Furthermore, the conductive element can electrically connect the heat exchange tube to the housing, thereby reducing the potential difference between the heat exchange tube and the housing and improving the reliability of the battery device.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] Referring to Figures 2, 4 to 8, 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 tube 31, a current collector 32, and a conductive element 33. The heat exchange tube 31 is a metal component and has a heat exchange flow channel 311 inside. The current collector 32 has a current collecting cavity and is connected to the end of the heat exchange tube 31. The current collecting cavity is connected to the heat exchange flow channel 311. The conductive element 33 is fixed on the current collector 32, abuts against the heat exchange tube 31, and is electrically connected to the heat exchange tube 31. The conductive element 33 is also electrically connected to the housing 10.

[0089] 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.

[0090] The heat exchange tube 31 is a metal component. Its cross-section can be circular, rectangular, elliptical, or other conventional or irregular shapes. The heat exchange tube 31 contains heat exchange channels 311, which can be one or more, providing a flow path for the heat exchange medium. The heat exchange tube 31 is attached to the surface of the battery cell assembly 20. When the heat exchange medium flows through the heat exchange channels 311, it carries away the heat generated by the battery cell assembly 20, thereby cooling the battery cell assembly 20. The heat exchange medium can be water, air, coolant, etc.

[0091] In some embodiments, the heat exchange tube 31 can be a flat tube, and the heat exchange tube 31 includes a plurality of heat exchange channels 311, which 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 stable support, constraint and anti-deformation effect for the battery cell 21.

[0092] In some embodiments, both ends of the heat exchange tube 31 are provided with a flow collector 32, allowing the heat exchange medium to circulate unidirectionally within the heat exchange tube 31. That is, the heat exchange medium can enter from the flow collector 32 at one end of the heat exchange tube 31 and then exit directly from the flow collector 32 at the other end of the heat exchange tube 31. Alternatively, the heat exchange medium can circulate repeatedly within the heat exchange tube 31 before exiting through a flow collector 32. The flow collector cavity within the flow collector 32 is connected to the heat exchange channel 311. When there are multiple heat exchange channels 311, all of them are connected to the flow collector cavity, which is used to supply the flow of the heat exchange medium.

[0093] The conductive component 33 is a component with electrical conductivity. In some embodiments, the conductive component 33 is a metal component. The material of the conductive component 33 can be a variety of 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 composite component of metal and plastic, etc.

[0094] The conductive element 33 is fixed to the current collector 32. The conductive element 33 can be partially embedded inside the current collector 32 or disposed outside the current collector 32, as long as it can be electrically connected to the heat exchange tube 31 and the housing 10. In some embodiments, the conductive element 33 is separately connected to the current collector 32. For example, the conductive element 33 can be detachably connected to the current collector 32, for example, by means of snap-fit, riveting, bolt connection, etc. In another embodiment, the conductive element 33 can also be integrally connected to the current collector 32, for example, by injection molding.

[0095] One end of the conductive element 33 abuts against and is electrically 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 conductive element 33 is also electrically connected to the housing 10. The conductive element 33 can directly contact the inner wall of the housing 10 or the beams in the housing 10, or it can be electrically connected to the housing 10 through conductive elements such as conductive foam 40. 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 10, 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.

[0096] 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 heat exchange channel 311 in the heat exchange tube 31 is connected to the current collector cavity 3211 in the current collector 32 to allow the heat exchange medium to flow between the heat exchange channel 311 and the current collector 32. The thermal management component 30 can exchange heat with the battery cell assembly 20, so that the battery cell assembly 20 can operate at a relatively safe temperature, thereby improving the operational stability of the battery device 100. The thermal management component 30 also includes a conductive element 33, which can be electrically connected to both the heat exchange tube 31 and the housing 10 at the same time to reduce the potential difference between the heat exchange tube 31 and the housing 10, thereby improving the reliability of the battery device 100.

[0097] Referring to Figures 8 to 10, in some embodiments, the flow collecting component 32 includes a flow collecting body 321 and a transition collar 322. The flow collecting cavity 3211 is disposed in the flow collecting body 321, and the transition collar 322 is sleeved on the end of the heat exchange tube 31. The flow collecting body 321 and the transition collar 322 are sealed together to seal and connect the heat exchange channel 311 and the flow collecting cavity 3211. The conductive element 33 is fixedly connected to at least one of the flow collecting body 321 and the transition collar 322.

[0098] The current collector 321 and the adapter collar 322 can be made of plastic or other materials. The adapter collar 322 is sleeved 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 methods, or it can be connected by welding or adhesive.

[0099] The collector 321 is used for collecting liquid and is disposed in the collector 321. The collector 321 is sealed to the transition collar 322, thereby achieving a sealed connection between the collector 321 and the heat exchange tube 31 through the transition collar 322, so as to seal the heat exchange channel 311 and the collection cavity 3211. The collector 321 can be welded to the transition collar 322 or glued to it.

[0100] As shown in Figure 8, the conductive element 33 is fixedly connected to the current collector 321 and 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 fixedly connected to one of the current collector 321 and the adapter collar 322, 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.

[0101] The current collector 32 provided in this embodiment includes a current collector 321 and an adapter ring 322. The current collector 321 and the adapter ring 322 are sealed together, so that the current collector 321 can be fixedly connected to the end of the heat exchange tube 31 through the adapter ring 322. The heat exchange tube 31 is relatively large and has a heat exchange flow channel 311 inside, which makes the end face of the heat exchange tube 31 potentially uneven. If the current collector 321 is directly connected to the heat exchange tube 31, there may be a problem of poor fit of the connection surface 313, affecting... The thermal management component 30 provided in this application embodiment seals the connection between the current collector 321 and the adapter ring 322, allowing the current collector 321 and the adapter ring 322 to fit tightly together, thereby improving the connection stability between the current collector 321 and the heat exchange tube 31 and the sealing reliability of the thermal management component 30. Furthermore, the conductive element 33 is fixedly connected to at least one of the current collector 321 and the adapter ring 322, and the fixing method of the conductive element 33 is relatively flexible and convenient.

[0102] Please refer to Figures 10 to 13. In some embodiments, the adapter collar 322 has a snap-fit ​​hole 3221 on one side; one end of the conductive element 33 is snapped in the snap-fit ​​hole 3221 and abuts against the heat exchange tube 31, and the other end of the conductive element 33 extends to the current collector 321 and is used for electrical connection with the housing 10.

[0103] The snap-fit ​​hole 3221 can be a through hole penetrating one side of the adapter collar 322, or it can be a blind hole recessed in the adapter collar 322. One end of the conductive element 33 is snapped into the snap-fit ​​hole 3221, so that the conductive element 33 can be fixedly installed relative to the adapter collar 322. Furthermore, the conductive element 33 can abut against the heat exchange tube 31 to achieve an electrical connection between the conductive element 33 and the heat exchange tube 31. Optionally, the portion of the conductive element 33 snapped into the snap-fit ​​hole 3221 can be sandwiched between the heat exchange tube 31 and the adapter collar 322, or the portion of the conductive element 33 extending outward from the snap-fit ​​hole 3221 can be directly attached to the surface of the heat exchange tube 31, both of which can achieve the effect of abutting between the conductive element 33 and the heat exchange tube 31.

[0104] In some embodiments, one end of the conductive element 33 away from the snap-fit ​​hole 3221 extends from the outer surface of the adapter collar 322 to the outer surface of the current collector 321, and the conductive element 33 can avoid the flow path of the heat exchange medium; in other embodiments, a portion of the conductive element 33 may pass through the interior of the adapter collar 322 or the current collector 321, and the end of the conductive element 33 is located on the outer surface of the current collector 321.

[0105] By providing a snap-fit ​​hole 3221 on the adapter collar 322, one end of the conductive element 33 is snapped into the snap-fit ​​hole and abuts against the heat exchange tube 31. In this way, the conductive element 33 can be fixedly disposed relative to the adapter collar 322 and the heat exchange tube 31, so as to connect the conductive element 33 to the heat exchange tube 31.

[0106] Referring to Figures 10 to 13, in some embodiments, one end of the conductive element 33 is clamped between the adapter collar 322 and the heat exchange tube 31. The adapter collar 322 has a hollow cavity 3222, and the inner wall of the adapter collar 322 covers the end of the heat exchange tube 31. The snap-fit ​​hole 3221 communicates with the hollow cavity 3222. One end of the conductive element 33 is a first contact portion 331, which is clamped between the inner wall of the adapter collar 322 and the heat exchange tube 31.

[0107] The first contact portion 331 is used for electrical contact with the heat exchange tube 31. The adapter collar 322 is annular and has a hollow cavity 3222 inside. Optionally, the adapter collar 322 can be prefabricated and then fitted onto the end of the heat exchange tube 31, or the adapter collar 322 can be directly injection molded onto the surface of the heat exchange tube 31. The inner wall of the adapter collar 322 covers the end of the heat exchange tube 31, thereby sealing the heat exchange channel 311. The snap-fit ​​hole 3221 communicates with the hollow cavity 3222, and the first contact portion 331 is snapped into the snap-fit ​​hole 3221, thereby clamping the first contact portion 331 between the inner wall of the adapter collar 322 and the heat exchange tube 31.

[0108] Because the first contact portion 331 is clamped between the inner wall of the adapter collar 322 and the heat exchange tube 31, the first contact portion 331 can be stably fixed on the surface of the heat exchange tube 31, reducing the risk of the conductive component 33 detaching from the heat exchange tube 31. The heat exchange tube 31 and the housing 10 are electrically connected through the conductive component 33, which has high reliability. At the same time, because the first contact portion 331 is clamped between the inner wall of the adapter collar 322 and the heat exchange tube 31, the conductive component 33 will not occupy the heat exchange surface 312 of the heat exchange tube 31, and is less likely to affect the heat exchange effect between the heat exchange tube 31 and the battery cell assembly 20.

[0109] Please refer to Figures 13 and 14. In some embodiments, the first contact portion 331 is interference-fitted with the transition collar 322 and the heat exchange tube 31.

[0110] The first contact portion 331 is clamped between the adapter collar 322 and the heat exchange tube 31, and the first contact portion 331 is interference-fitted with the adapter collar 322 and the heat exchange tube 31, so that the first contact portion 331 can maintain contact with the heat exchange tube 31 under a certain pressure, and the contact reliability between the conductive component 33 and the heat exchange tube 31 is high.

[0111] Please refer to Figures 13 and 14. In some embodiments, the first contact portion 331 is provided with a protruding structure 3311, which abuts against the transition collar 322 or the heat exchange tube 31.

[0112] Optionally, the protrusion structure 3311 is a protruding ridge provided at the end of the first contact portion 331, which facilitates the insertion of the first contact portion 331 into the snap-fit ​​hole 3221 and enables the first contact portion 331 to be interference-fitted with the adapter collar 322 and the heat exchange tube 31; in other embodiments, the protrusion structure 3311 may also be one or more protrusions or other protrusions.

[0113] In this embodiment, the protruding structure 3311 is located on the side of the first contact portion 331 facing the adapter collar 322, and the protruding structure 3311 abuts against the inner wall of the adapter collar 322. In other embodiments, the protruding structure 3311 may also be provided on the side of the first contact portion 331 facing the heat exchange tube 31.

[0114] By providing a protruding structure 3311 on the first contact portion 331, the first contact portion 331 can be installed between the heat exchange tube 31 and the transition collar 322 by interference fit, which further improves the safety and stability of the conductive component 33 and the contact reliability between the conductive component 33 and the heat exchange tube 31.

[0115] Referring to Figures 10 to 14, in some embodiments, the snap-fit ​​hole 3221 penetrates the side of the adapter collar 322 away from the current collector 321 and the outer wall of the adapter collar 322 away from the heat exchange tube 31; one end of the conductive member 33 is a first contact portion 331, which is bent to form a first section 331a and a second section 331b. The first section 331a extends along the side of the adapter collar 322 and is snapped into the snap-fit ​​hole 3221, while the second section 331b is sandwiched between the inner wall of the adapter collar 322 and the heat exchange tube 31.

[0116] The snap-fit ​​hole 3221 penetrates the side of the adapter collar 322 opposite to the current collector 321 to form an insertion interface for inserting the conductive component 33 into the snap-fit ​​hole 3221. Simultaneously, the snap-fit ​​hole 3221 also penetrates the inner wall of the adapter collar 322, allowing the first contact portion 331 to be inserted into the snap-fit ​​hole 3221 from the insertion interface and contact the surface of the heat exchange tube 31. Furthermore, the snap-fit ​​hole 3221 is recessed relative to the side of the adapter collar 322 to facilitate locking the first section 331a.

[0117] The first contact portion 331 is located at one end of the conductive element 33. The first contact portion 331 is bent to form a first section 331a and a second section 331b. Optionally, the first section 331a and the second section 331b are perpendicularly connected, and the second section 331b is parallel to the heat exchange surface of the heat exchange tube 31. Both the first section 331a and the second section 331b can be sheet-like. In other embodiments, the included angle between the first section 331a and the second section 331b can also be an acute angle or an obtuse angle. The first section 331a is attached to the side of the adapter collar 322, and the second section 331b is inserted into the snap-fit ​​hole 3221 through the insertion interface. The second section 331b is clamped between the heat exchange tube 31 and the adapter collar 322, and the second section 331b is used to contact the heat exchange tube 31.

[0118] By adopting the above technical solution, the first contact portion 331 is bent to facilitate its insertion into the snap-fit ​​hole 3221; the first section 331a of the first contact portion 331 can be snapped into the notch on the side of the adapter collar 322, and the second section 331b of the first contact portion 331 can form a larger contact area with the heat exchange tube 31, thereby improving the connection reliability between the conductive component 33 and the heat exchange tube 31.

[0119] Referring to Figure 13, in some embodiments, along the extension direction (X direction) of the heat exchange tube 31, the length d1 of the portion of the heat exchange tube 31 covered by the transition collar 322 is greater than the length d2 of the second section 331b.

[0120] The end of the heat exchange tube 31 facing the collector 321 is covered by a transition collar 322. The length of this part is greater than the length of the second section 331b. Thus, the distance from the second section 331b to the collector 321 is greater than the distance from the heat exchange tube 31 to the collector 321. The port of the heat exchange channel 311 of the heat exchange tube 31 is covered by the transition collar 322, making it difficult for the heat exchange medium in the heat exchange channel 311 to flow out from the snap-fit ​​hole 3221. Therefore, the thermal management component 30 provided in this embodiment can use the conductive element 33 snapped onto the transition collar 322 to conduct the heat exchange tube 31 and the housing 10. At the same time, the thermal management component 30 can still maintain good sealing performance, and the heat exchange medium is not easy to leak.

[0121] Referring to Figures 10, 13, and 14, in some embodiments, the conductive element 33 further includes a connecting portion 333 and a second contact portion 332. The first contact portion 331 and the second contact portion 332 are respectively bent and connected to the two ends of the connecting portion 333. The connecting portion 333 extends on the outer surface of the adapter collar 322 and the current collector 321. The second contact portion 332 is fixed to the outer surface of the current collector 321 and is used for electrical connection with the housing 10.

[0122] The second contact portion 332 is used for electrical contact with the housing 10. The connection portion 333 extends on the outer surface of the adapter collar 322 and the collector 321, so that the connection portion 333 can avoid the flow path of the heat exchange medium. The first contact portion 331 is connected to the end of the connection portion 333 facing the heat exchange tube 31. Specifically, the first section 331a of the first contact portion 331 is bent and connected to the connection portion 333. Optionally, the first section 331a can be perpendicularly connected to the connection portion 333. The second contact portion 332 is bent and connected to the other end of the connection portion 333. The shape of the second contact portion 332 is adapted to the collector 321 to facilitate fixing it to the outer surface of the collector 321. The second contact portion 332 is also used for electrical connection with the housing 10. Optionally, the second contact portion 332 is electrically connected to the housing 10 through the conductive foam 40 inside the housing 10. It can be understood that the second contact portion 332 can also directly contact the housing 10, for example, the second contact portion 332 contacts the beam inside the housing 10.

[0123] In this embodiment, the conductive element 33 is fixed to the middle of the current collecting component 32 along the height direction of the housing 10. In other embodiments, the conductive element 33 can also be fixed to the bottom of the housing 10. In this case, the connecting part 333 can be configured to contact and electrically connect with the housing 10.

[0124] The first contact portion 331, the connecting portion 333, and the second contact portion 332 can be integrally formed, which is relatively simple to manufacture. Understandably, the first contact portion 331, the connecting portion, and the second contact portion 332 can also be fixedly connected by welding or other methods.

[0125] The conductive component 33 provided in this embodiment includes a connecting portion 333 and a first contact portion 331 and a second contact portion 332 disposed at both ends of the connecting portion 333. The first contact portion 331 can be snapped into the adapter collar 322 and electrically connected to the heat exchange tube 31. The second contact portion 332 can be fixed to the surface of the current collector 321 and electrically connected to the housing 10. In this way, the conductive component 33 can be fixed on the current collector 32 and the equipotential connection between the heat exchange tube 31 and the housing 10 is realized.

[0126] Please refer to Figures 9, 10, and 13. In some embodiments, the adapter collar 322 or the current collector 321 is provided with a first limiting part 3223, and the connecting part 333 is provided with a first mating part 3331. The first mating part 3331 is engaged with the first limiting part 3223.

[0127] Optionally, one of the first limiting part 3223 and the first mating part 3331 may be a limiting hole, and the other may be a retaining protrusion. For example, as shown in FIG9, the first limiting part 3223 is a retaining protrusion protruding on the adapter collar 322, and the first mating part 3331 is a limiting hole penetrating the connecting part 333. In this way, when the first contact part 331 of the conductive member 33 is inserted into the retaining hole, the retaining protrusion can engage in the limiting hole to position the conductive member 33.

[0128] In other embodiments, the first limiting part 3223 and the first mating part 3331 may also be other structures that can cooperate to achieve limiting, for example, the first limiting part 3223 and the first mating part 3331 are both holding protrusions.

[0129] By adopting the above technical solution, the first limiting part 3223 and the first mating part 3331 are engaged to limit the conductive part 33. On the one hand, the conductive part 33 can be installed in place, and on the other hand, the conductive part 33 is not easy to detach from the current collecting component 32.

[0130] Please refer to Figures 9 to 13. In some embodiments, the current collector 321 is provided with a second limiting part 3212, and the second contact part 332 is provided with a second mating part 3321. The second mating part 3321 is engaged with the second limiting part 3212.

[0131] Optionally, the second limiting part 3212 can be a limiting groove, a limiting hole, etc., and the second mating part 3321 can be inserted into the second limiting part 3212.

[0132] In other embodiments, the second limiting part 3212 and the second mating part 3321 may also be other structures that can cooperate to achieve limiting.

[0133] By adopting the above technical solution, the second limiting part 3212 and the second mating part 3321 are engaged, which can limit the conductive part 33, and facilitate the precise positioning of the conductive part 33 on the current collector 321.

[0134] In some embodiments, the second limiting portion 3212 is a limiting groove, and the end of the second contact portion 332 is a second mating portion 3321, which is inserted into the limiting groove.

[0135] When assembling the conductive component 33, the first contact portion 331 of the conductive component 33 is snapped into the snap-fit ​​hole 3221, the connecting portion 333 of the conductive component 33 spans across the adapter collar 322 and the current collector 321, and the end of the second contact portion 332 is inserted into the limiting groove. In this way, both ends and the middle of the conductive component 33 are limited, and the conductive component 33 is not easy to loosen or shift, thus improving the reliability of the equipotential connection.

[0136] In some embodiments, the adapter collar 322 is provided with a first limiting part 3223, the current collector 321 is provided with a second limiting part 3212, the connecting part 333 of the conductive member 33 is engaged with the first limiting part 3223, the second contact part 332 of the conductive member is engaged with the second limiting part 3212, and the first contact part 331 of the conductive member 33 is engaged with the engaging hole 3221. In this way, the conductive member 33 can be accurately positioned and can be stably and tightly fixed to the current collector 32 without occupying too much space inside the housing 10.

[0137] Referring to Figure 10, the current collector 321 includes a first housing portion 321a, a second housing portion 321b, and a connector 321c. The first housing portion 321a is sealed to the adapter collar 322. The second housing portion 321b is connected to the side of the first housing portion 321a away from the adapter collar 322. The connector 321c is connected to the second housing portion 321b. The connecting portion 333 is fixed to the adapter collar 322 and the first housing portion 321a, and the second contact portion 332 is fixed to the second housing portion 321b.

[0138] The end face of the first housing part 321a is sealed to the transition collar 322 by welding or other means. The second housing part 321b is used to install the connector 321c, which is used for the inflow and / or outflow of heat exchange medium. When there are multiple collectors 321, the connectors 321c of the multiple collectors 321 can be connected together by connecting pipes. The collection cavity 3211 is located inside the first housing part 321a, and the connector 321c communicates with the collection cavity 3211.

[0139] For example, referring to Figures 10 to 14, the second contact portion 332 includes a first fitting segment 332a, a second fitting segment 332b, and a third fitting segment 332c connected in sequence. The first fitting segment 332a is fitted to the side of the first housing portion 321a, and the second fitting segment 332b and the third fitting segment 332c are fitted to the second housing portion 321b, so that the second contact portion 332 can adapt to the shape of the current collector 321. One or more of the first fitting segment 332a, the second fitting segment 332b, and the third fitting segment 332c can be configured to contact the housing 10.

[0140] By adopting the above technical solution, the second contact portion 332 of the conductive element 33 can be adapted to the structure of the current collector 321 and connected to the surface of the current collector 321, which is beneficial for the conductive element 33 to be stably connected to the current collector 32. Furthermore, the second contact portion 332 can be configured to have a large area to facilitate contact with the housing 10.

[0141] In some embodiments, referring to Figures 4 and 8, the heat exchange tube 31 includes two heat exchange surfaces 312 and two connecting surfaces 313 arranged opposite to each other. The heat exchange surfaces 312 are directly opposite to the battery cell assembly 20. The heat exchange surfaces 312 are planar, and each connecting surface 313 connects the two heat exchange surfaces 312. One end of the conductive element 33 abuts against the heat exchange surface 312.

[0142] The heat exchange surface 312 is a plane, and the connecting surface 313 can be a plane, a curved surface, etc. The heat exchange surface 312 can be fixedly connected to the large surface of the battery cell 21 by means of bonding, etc., so as to obtain a better thermal management effect.

[0143] The conductive element 33 abuts against the heat exchange surface 312. Specifically, the first contact portion 331 abuts against the heat exchange surface 312. The first contact portion 331 can be a sheet or other shapes. The second section and the heat exchange surface 312 can achieve planar contact, resulting in a relatively stable connection.

[0144] By adopting the above technical solution, the conductive element 33 abuts against the heat exchange surface 312 of the heat exchange tube 31, which can achieve planar contact and a large contact area, which is conducive to the stable connection and electrical connection between the conductive element 33 and the heat exchange tube 31.

[0145] In other embodiments, the conductive element 33 may also abut against the connection surface 313 of the heat exchange tube 31.

[0146] In some embodiments, both the manifold and the adapter collar 322 are plastic parts.

[0147] The heat exchange tube 31 is a metal part, while the current collector 321 and the adapter collar 322 are both plastic parts. During manufacturing, the heat exchange tube 31 is provided first, and the adapter collar 322 is wrapped around the end of the heat exchange tube 31 by injection molding. Then, the current collector 321 is fixedly connected to the adapter collar 322, so that the current collector can be fixed on the heat exchange tube 31. Since both the adapter collar 322 and the current collector 321 are made of plastic, they can be fixedly connected by welding.

[0148] By adopting the above technical solution, since the adapter collar 322 is a plastic part, the adapter collar 322 can be wrapped around the metal heat exchange tube 31 by overmolding, which solves the problem of difficult welding between components of different materials; at the same time, the use of plastic material for the current collector 321 and the adapter collar 322 can reduce weight and cost.

[0149] It is understood that in other embodiments, the adapter collar 322 may be omitted.

[0150] In some embodiments, the inner surface of the housing 10 is provided with conductive foam 40 (not shown), and the conductive element 33 abuts against the conductive foam 40.

[0151] Conductive foam 40 can be disposed on the bottom surface, inner surface, side beam, or other beam surface of the housing 10. Conductive component 33 abuts against conductive foam 40 to electrically connect with housing 10 through conductive foam 40. Conductive foam 40 can play a certain role in elastic pre-tensioning. When conductive component 33 abuts against conductive foam 40, conductive foam 40 can be compressed, which is conducive to the stable connection between current collector 32 and housing 10 and improves the reliability of electrical conductivity between current collector 32 and housing 10.

[0152] In some embodiments, the position and height of the conductive foam 40 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 its installation.

[0153] 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.

[0154] 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.

[0155] 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.

[0156] Referring to Figures 2 to 14, 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 includes a heat exchange tube 31, a current collector 32, and a conductive element 33. The heat exchange tube 31 is a metal component and has a heat exchange flow channel 311 inside. The current collector 32 has a current collection cavity 3211 and is connected to the end of the heat exchange tube 31. The current collection cavity is connected to the heat exchange flow channel 311. The conductive element 33 is fixed on the current collector 32, abuts against the heat exchange tube 31, and is electrically connected to the heat exchange tube 31. The conductive element 33 is also electrically connected to the housing 10. The collector component 32 includes a collector 321 and a transition collar 322. The collector cavity 3211 is disposed in the collector 321. The transition collar 322 is sleeved on the end of the heat exchange tube 31. The collector 321 and the transition collar 322 are sealed together to seal and connect the heat exchange channel 311 and the collector cavity 3211. A snap-fit ​​hole 3221 is provided on one side of the transition collar 322. One end of the conductive element 33 is snapped into the snap-fit ​​hole 3221 and abuts against the heat exchange tube 31. The other end of the conductive element 33 extends to the collector 321 and is used for electrical connection with the housing 10.

[0157] The housing 10 includes an upper housing 11 and a lower housing 12. The battery cell assembly 20 includes multiple battery cells 21. Optionally, the battery cells 21 are fixed to the heat exchange tubes 31 by adhesive, and the bottom of the battery cells 20 is connected to the lower housing 12 by structural adhesive. The conductive component 33 is engaged with the adapter collar, so that the conductive component 33 is not easy to fall off. The conductive component 33 is electrically connected to the heat exchange tubes 31 and the housing 10. Thus, by setting the conductive component 33, the heat exchange tubes 31 and the housing 10 can be electrically connected, reducing the potential difference between the heat exchange tubes 31 and the housing 10, which is conducive to achieving equipotential bonding between the heat exchange tubes 31 and the housing 10, and improving the reliability of the battery device 100.

[0158] 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.

[0159] The power supply device can be any of the aforementioned devices or systems that utilize battery device 100.

[0160] 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, characterized in that, 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, a current collector, and a conductive element. The heat exchange tube is a metal component with a heat exchange flow channel inside. The current collector has a current collection cavity and is connected to the end of the heat exchange tube, with the current collection cavity communicating with the heat exchange flow channel. The conductive element is fixed to the current collector, abuts against the heat exchange tube, and is electrically connected to the heat exchange tube. The conductive element is also electrically connected to the housing.

2. The battery device as claimed in claim 1, characterized in that, The flow collection component includes a flow collector and a transition sleeve. The flow collection cavity is disposed in the flow collector, and the transition sleeve is sleeved on the end of the heat exchange tube. The flow collector and the transition sleeve are sealed together to seal and connect the heat exchange channel and the flow collection cavity. The conductive element is fixedly connected to at least one of the flow collector and the transition sleeve.

3. The battery device as claimed in claim 2, characterized in that, The adapter collar has a snap-fit ​​hole on one side; one end of the conductive element is snapped into the snap-fit ​​hole and abuts against the heat exchange tube, and the other end of the conductive element extends to the current collector and is used for electrical connection with the housing.

4. The battery device as claimed in claim 3, characterized in that, The adapter collar has a hollow cavity, and the inner wall of the adapter collar covers the end of the heat exchange tube. The snap-fit ​​hole communicates with the hollow cavity. One end of the conductive element is a first contact portion, which is clamped between the inner wall of the adapter collar and the heat exchange tube.

5. The battery device as described in claim 3 or 4, characterized in that, The first contact portion is interference-fitted with the adapter collar and the heat exchange tube.

6. The battery device as claimed in claim 5, characterized in that, The first contact portion is provided with a protruding structure, which abuts against the adapter collar or the heat exchange tube.

7. The battery device according to any one of claims 4 to 6, characterized in that, The snap-fit ​​hole penetrates the side of the adapter sleeve away from the current collector and the outer wall of the adapter sleeve away from the heat exchange tube; the first contact portion is bent to form a first section and a second section, the first section extends along the side of the adapter sleeve and is snapped in the snap-fit ​​hole, and the second section is sandwiched between the inner wall of the adapter sleeve and the heat exchange tube.

8. The battery device as claimed in claim 7, characterized in that, Along the extension direction of the heat exchange tube, the length of the portion of the heat exchange tube covered by the transition collar is greater than the length of the second section.

9. The battery device as claimed in any one of claims 4-8, characterized in that, The conductive component further includes a connecting portion and a second contact portion. The first contact portion and the second contact portion are respectively bent and connected to both ends of the connecting portion. The connecting portion extends on the outer surface of the adapter collar and the current collector. The second contact portion is fixed to the outer surface of the current collector and is used for electrical connection with the housing.

10. The battery device as claimed in claim 9, characterized in that, The adapter collar or the current collector is provided with a first limiting part, and the connecting part is provided with a first mating part, the first mating part being engaged with the first limiting part.

11. The battery device as claimed in claim 9 or 10, characterized in that, The current collector is provided with a second limiting part, and the second contact part is provided with a second mating part, and the second mating part is engaged with the second limiting part.

12. The battery device as claimed in claim 11, characterized in that, The second limiting part is a limiting groove, and the end of the second contact part is the second mating part, which is inserted into the limiting groove.

13. The battery device according to any one of claims 9-12, characterized in that, The current collector includes a first housing part, a second housing part, and a connector. The first housing part is sealed to the adapter collar, the second housing part is connected to the side of the first housing part away from the adapter collar, and the connector is connected to the second housing part. The connecting part is fixed to the adapter collar and the first housing part, and the second contact part is fixed to the second housing part.

14. The battery device according to any one of claims 1-13, characterized in that, The heat exchange tube includes two oppositely arranged heat exchange surfaces and two oppositely arranged connecting surfaces. The heat exchange surfaces are directly opposite to the battery cell assembly. The heat exchange surfaces are planar. Each connecting surface connects the two heat exchange surfaces. One end of the conductive element abuts against the heat exchange surface.

15. The battery device according to any one of claims 2-14, characterized in that, Both the current collector and the adapter collar are plastic parts.

16. The battery device according to any one of claims 1-15, characterized in that, The inner surface of the housing is provided with conductive foam, and the conductive component contacts the conductive foam.

17. The battery device according to any one of claims 1-16, characterized in that, The number of thermal management components is multiple, and the battery cell assembly is placed between two adjacent thermal management components.

18. An electrical appliance, characterized in that, Includes a battery device as described in any one of claims 1-17, the battery device being used to provide electrical energy.

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