Battery device and electric equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a battery device and electric equipment. In the embodiment of the invention, the first protection layer is arranged on one side, facing the battery monomer, of the body of the heat management component, and the electrode potential of the first protection layer is lower than that of the body, so that the first protection layer can be subjected to electrochemical corrosion before the body when electrochemical corrosion occurs, and the body can be protected; and the risk that the heat exchange medium in the body leaks from the body to one side of the single battery after the body is corroded is reduced, so that the reliability of the single battery can be improved, and the reliability of the battery device is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to battery devices and electrical equipment. Background Technology

[0002] Battery devices can be used to store or provide electrical energy and can be used in electrical equipment, such as vehicles. In related technologies, multiple battery cells are installed in a housing, which is then used to mount the cells in vehicles and other electrical equipment. To improve energy density, the housing needs to be lightweight and compact. However, while using lightweight materials such as aluminum alloys reduces weight, they are susceptible to corrosion from electrolyte leakage and environmental humidity, affecting the reliability of the battery device. Therefore, additional surface treatment is needed to enhance corrosion resistance, leading to increased processing steps and reduced manufacturing efficiency. If corrosion-resistant materials such as stainless steel are chosen to reduce corrosion risk, their increased weight reduces energy density and increases processing difficulty, further impacting manufacturing efficiency. Therefore, it is difficult to simultaneously improve energy density and ensure both reliability and manufacturing efficiency. Utility Model Content

[0003] Based on this, this application provides a battery device and an electrical appliance that can improve the energy density of the battery device while taking into account reliability and manufacturing efficiency.

[0004] According to one aspect of this application, a battery device is provided, including a battery cell, a thermal management component, and a housing. The thermal management component includes a body and a first protective layer. The body is used for heat exchange with the battery cell, and the first protective layer is disposed on the side of the body facing the battery cell. The electrode potential of the first protective layer is configured to be lower than the electrode potential of the body. The housing includes a main body and a bottom cover. The main body includes a frame and a top cover. The frame has a top opening and a bottom opening. The thermal management component is connected to the frame and closes the bottom opening. The top cover closes the top opening of the frame. The top cover, frame, and thermal management component together define a receiving cavity in which the battery cell is located. The bottom cover is located on the side of the thermal management component opposite to the receiving cavity and is connected to the frame.

[0005] In the technical solution of this application embodiment, the housing is configured to include a main body and a bottom protective plate, and the main body is configured to include a frame and a top cover, allowing the frame and top cover to be manufactured separately and then assembled into the main body. Since the thermal management component and the main body together define the receiving cavity, and the battery cell is located within the receiving cavity, the thermal management component carries the battery cell and can directly exchange heat with it. Because the bottom protective plate is located on the bottom side of the thermal management component, it can protect the thermal management component. This installation method not only allows for direct connection between the thermal management component and the frame, simplifying installation and improving manufacturing efficiency, but also helps improve the space utilization within the housing, thereby increasing the energy density of the battery device. By providing a first protective layer on the side of the thermal management component facing the battery cell, and ensuring that the electrode potential of the first protective layer is lower than that of the main body, even if moisture enters the receiving cavity through the connection between the thermal management component and the frame and undergoes electrochemical corrosion, the first protective layer can undergo electrochemical corrosion before the main body, thus protecting the main body and reducing the risk of leakage of the heat exchange medium from the side facing the battery cell after corrosion, thereby reducing the reliability risks caused by corrosion. Therefore, the battery device provided in this application embodiment can improve the energy density of the battery device while taking into account reliability and manufacturing efficiency.

[0006] In some embodiments, the body includes a first plate and a second plate stacked together, the second plate being located on the side of the first plate opposite to the battery cell, and the sides of the first plate and the second plate opposite to each other defining a flow channel for accommodating a heat exchange medium. A first protective layer is disposed on the side of the first plate opposite to the second plate, and the electrode potential of the first protective layer is lower than the electrode potential of the first plate.

[0007] By configuring the main body as a stacked structure of a first plate and a second plate, heat exchange can be achieved through the flow channels defined by the first and second plates, and the manufacturing of the main body is also facilitated. By setting the electrode potential of the first protective layer to be lower than that of the first plate, the first protective layer can undergo electrochemical corrosion before the first plate during electrochemical corrosion, thereby protecting the first plate and reducing the risk of heat exchange medium leakage to the battery cells after the first plate corrodes, thus improving the reliability of the battery device.

[0008] In some embodiments, the ratio of the thickness of the first protective layer to the thickness of the first plate is 0.07 to 0.12.

[0009] By controlling the ratio of the thickness of the first protective layer to the thickness of the first plate, not only is the first protective layer not too thin, thus making the first plate less susceptible to through-corrosion during electrochemical corrosion, but the first protective layer is also not too thick, thereby improving the energy density of the battery device. Therefore, the battery device can achieve both a certain level of reliability and a certain level of energy density.

[0010] In some embodiments, the ratio of the thickness of the first protective layer to the thickness of the first plate is 0.09 to 0.11.

[0011] By further controlling the ratio of the thickness of the first protective layer to the thickness of the first plate, not only can the corrosion resistance of the first protective layer be further improved, but the impact on the mechanical properties of the plate can also be minimized, making the protective effect and the plate's own function more synergistic, and further improving the energy density of the battery device.

[0012] In some embodiments, the material of the first protective layer includes one of aluminum-zinc alloy, zinc-aluminum-magnesium alloy, and zinc-iron alloy.

[0013] Thus, the above alloy composition can form a more stable protective layer with good corrosion resistance, processing adaptability and environmental adaptability, which can more effectively resist the erosion of corrosive media and improve the reliability and stability of thermal management components.

[0014] In some embodiments, the thickness of the first protective layer is 50 μm to 100 μm.

[0015] By controlling the thickness of the first protective layer, it is possible to prevent it from being too thin, thus minimizing the risk of through-corrosion of the thermal management components during electrochemical corrosion. Conversely, the thickness of the first protective layer is also controlled to improve the energy density of the battery device. Therefore, the battery device can achieve both a certain level of reliability and a certain level of energy density.

[0016] In some embodiments, insulation is provided between the battery cell and the thermal management component.

[0017] This reduces the risk of short circuits between the thermal management components and individual battery cells.

[0018] In some embodiments, a battery cell includes a battery cell body and an insulating member disposed outside the battery cell body. The battery cell body is insulated from thermal management components by means of the insulating member.

[0019] Because the battery cell body is insulated from the thermal management components by an insulating material covering it, the conductive path between the battery cell body and the thermal management components can be blocked structurally, effectively reducing the risk of short circuit.

[0020] In some embodiments, the thermal management component further includes a second protective layer. The second protective layer is disposed on the side of the body away from the battery cell, and the electrode potential of the second protective layer is configured to be lower than the electrode potential of the body.

[0021] By setting a second protective layer on the side of the thermal management component away from the battery cell, and making the electrode potential of the second protective layer lower than that of the main body, the second protective layer can undergo electrochemical corrosion before the main body when electrochemical corrosion occurs. This can protect the main body, reduce the risk of heat exchange medium inside the main body leaking from the side away from the battery cell after the main body is corroded, and thus improve the reliability of the battery device.

[0022] In some embodiments, the body includes a first plate and a second plate stacked together. The second plate is located on the side of the first plate opposite to the battery cell. The sides of the first and second plates opposite to each other define a flow channel for accommodating a heat exchange medium. A first protective layer is disposed on the side of the first plate opposite to the second plate, and the electrode potential of the first protective layer is lower than the electrode potential of the first plate. A second protective layer is disposed on the side of the second plate opposite to the first plate, and the electrode potential of the second protective layer is lower than the electrode potential of the second plate.

[0023] By configuring the main body as a stacked structure of first and second plates, heat exchange can be achieved through the flow channels defined by the first and second plates, and the manufacturing of the main body is also facilitated. By setting the electrode potential of the first protective layer lower than that of the first plate, the first protective layer can undergo electrochemical corrosion before the first plate during electrochemical corrosion, thus protecting the first plate and reducing the risk of heat exchange medium leakage to the battery cells after corrosion of the first plate. Similarly, by setting the electrode potential of the second protective layer lower than that of the second plate, the second protective layer can undergo electrochemical corrosion before the second plate during electrochemical corrosion, thus protecting the second plate and reducing the risk of heat exchange medium leakage after corrosion of the second plate. This improves the reliability of the battery device.

[0024] In some embodiments, the ratio of the thickness of the second protective layer to the thickness of the second plate is 0.07 to 0.12.

[0025] By controlling the ratio of the thickness of the second protective layer to the thickness of the second plate, the second protective layer is prevented from being too thin, thus making the second plate less susceptible to through-corrosion during electrochemical corrosion. Simultaneously, the second protective layer is prevented from being too thick, thereby improving the energy density of the battery device. Therefore, the battery device can achieve both a certain level of reliability and a certain level of energy density.

[0026] In some embodiments, the ratio of the thickness of the second protective layer to the thickness of the second plate is 0.09 to 0.11.

[0027] By further controlling the ratio of the thickness of the second protective layer to the thickness of the second plate, not only can the corrosion resistance of the second protective layer be further improved, but the impact on the mechanical properties of the plate can also be minimized, making the protective effect and the plate's own function more synergistic, and further improving the energy density of the battery device.

[0028] In some embodiments, the material of the second protective layer includes one of aluminum-zinc alloy, zinc-aluminum-magnesium alloy, and zinc-iron alloy.

[0029] Thus, the above alloy composition can form a more stable protective layer with good corrosion resistance, processing adaptability and environmental adaptability, which can more effectively resist the erosion of corrosive media and improve the reliability and stability of thermal management components.

[0030] In some embodiments, the thickness of the second protective layer is 50 μm to 100 μm.

[0031] By controlling the thickness of the second protective layer, it is possible to prevent it from being too thin, thus minimizing the risk of through-corrosion of the thermal management components during electrochemical corrosion. Conversely, the thickness of the second protective layer is also controlled to improve the energy density of the battery device. Therefore, the battery device can achieve both a certain level of reliability and a certain level of energy density.

[0032] In some embodiments, the second plate has a groove on the side facing the first plate, and the first plate and the groove define an outlet channel.

[0033] By creating a groove on the side of the second plate facing the first plate to form a flow channel, a simplified overall structural design and assembly process is achieved, eliminating the need for additional independent flow channel components, saving space and reducing costs. Furthermore, the layered and fitted structure of the first and second plates enhances the sealing of the flow channel, reducing the risk of fluid leakage. In addition, the shape of the flow channel can be flexibly adjusted according to the groove design to adapt to different fluid flow rates and heat exchange requirements, enhancing the practicality and adaptability of the structure.

[0034] In some embodiments, the thermal management component and the bottom cover are located on the side of the frame away from the top cover, and the thermal management component and the bottom cover are connected to the frame via connectors.

[0035] Therefore, compared to methods such as welding, this effectively shortens the production cycle and improves production efficiency. When the connector is a self-tapping bolt, compared to using nuts or other connection structures, no space needs to be reserved for installation, which helps to optimize the internal structure of the battery device, improve space utilization, and thus increase the energy density of the battery device.

[0036] According to another aspect of this application, this application provides an electrical device including the battery device in any of the above embodiments.

[0037] The advantages of the battery device in any of the above embodiments are also present in this electrical device, and will not be repeated here.

[0038] 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

[0039] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the embodiments described below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0040] Figure 1 This is a schematic diagram of the vehicle structure in some embodiments of this application;

[0041] Figure 2 This is an exploded view of the battery device in some embodiments of this application;

[0042] Figure 3 This is a schematic diagram showing the exploded structure of a single battery cell in some embodiments of this application;

[0043] Figure 4 This is a top view of the thermal management component in some embodiments of this application;

[0044] Figure 5 This is a bottom view of the thermal management component in some embodiments of this application;

[0045] Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure with the mid-section view direction A1-A1;

[0046] Figure 7 for Figure 6 A magnified schematic diagram of the local structure at point G1;

[0047] Figure 8 for Figure 7 A magnified schematic diagram of the local structure at point G2;

[0048] Figure 9 This is an exploded structural diagram showing the interaction between the housing and thermal management components in some embodiments of this application;

[0049] Figure 10 for Figure 9 A top view of the structure after removing the top cover;

[0050] Figure 11 for Figure 10 A schematic diagram of the cross-sectional structure with the battery cell in the mid-section view along the A2-A2 direction;

[0051] Figure 12 for Figure 11 A magnified schematic diagram of the local structure at point G3;

[0052] Figure 13 for Figure 12 A magnified schematic diagram of the local structure at point G4;

[0053] Figure 14 This is a partial cross-sectional view of the thermal management component in some other embodiments of this application.

[0054] Explanation of reference numerals in the attached figures:

[0055] Vehicle 1;

[0056] Battery unit 10, controller 20, motor 30;

[0057] Battery cell 100, battery cell body 110, outer shell 111, housing 1111, end cap 1112, electrode terminal 1101, electrode assembly 112, insulating component 120;

[0058] Thermal management component 200, body 210, first plate 211, second thickness d2, second plate 212, fourth thickness d4, groove X, flow channel P, first protective layer 220, first thickness d1, second protective layer 230, third thickness d3, welding layer 240, insulation layer 250.

[0059] Box body 300, first part 301, second part 302, box body 310, frame 311, top side opening k1, bottom side opening k2, top cover 312, bottom guard plate 320, receiving cavity Q, path R;

[0060] Connector 400;

[0061] Seal 500;

[0062] Filler 600;

[0063] First direction F1, second direction F2, third direction F3. Detailed Implementation

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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).

[0070] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0071] 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.

[0072] 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 extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0073] In battery devices, if the electrolyte in a single battery cell leaks, or if rainwater, industrial pollutants, or other liquids come into contact with the thermal management components, corrosion of the components can occur, leading to leakage of the heat exchange medium. Especially when corrosion occurs on the side of the thermal management components facing the battery cell, causing heat exchange medium leakage, the leaked medium can easily come into direct contact with other components or battery cells within the battery device. This can not only cause a short circuit in the battery device but also damage other components, thereby reducing the reliability of the battery device.

[0074] Therefore, to improve the reliability of the battery device, this application provides a battery device that enhances the reliability of the thermal management component by providing a protective layer, thereby improving the reliability of the battery device. Specifically, by providing a protective layer on the side of the thermal management component facing the battery cell, the protective layer preferentially undergoes electrochemical corrosion in the event of electrochemical corrosion, thereby reducing the risk of leakage of the heat exchange medium of the thermal management component and thus improving the reliability of the battery device.

[0075] The battery cells disclosed in this application can be used, but are not limited to, in electrical equipment such as vehicles, ships, or aircraft. A power system for such electrical equipment can be constructed using the battery cells disclosed in this application and other components, which helps to improve the reliability of the battery device.

[0076] This application provides an electrical device that uses a battery as a power source. The electrical device is a device that uses electrical energy to perform corresponding functions by consuming electrical energy. Examples include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, and spacecraft. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0077] The electrical device described in this application embodiment may include a device body and a power supply device. The power supply device supplies power to the device body and may include individual battery cells or a battery pack. The device body refers to the main structure that consumes electrical energy to perform its corresponding function. For example, the electrical device may be a mobile phone, where the device body is the part capable of communication functions, and power is supplied to this part through individual battery cells or a battery pack. Similarly, the electrical device may be a car, where the device body is the part for passengers and for driving on roads, and power is supplied to this part through individual battery cells or a battery pack. The power supply device is a device capable of outputting electrical energy. For example, electrical energy can be output through a battery pack composed of individual battery cells.

[0078] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0079] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of vehicle 1 in some embodiments of this application. Vehicle 1 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 10 is installed inside vehicle 1, and the battery device 10 can be located at the bottom, front, or rear of vehicle 1. The battery device 10 can be used to power vehicle 1; for example, the battery device 10 can serve as the operating power source for vehicle 1. Vehicle 1 may also include a controller 20 and a motor 30. The controller 20 is used to control the battery device 10 to supply power to the motor 30, for example, to meet the power needs of vehicle 1 during starting, navigation, and driving.

[0080] In some embodiments of this application, the battery device 10 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0081] To meet different power demands, the battery device 10 may include multiple battery cells 100, where a battery cell 100 is the smallest unit that makes up a battery module or battery pack. Multiple battery cells 100 can be connected in series and / or in parallel via electrode terminals 1101 for various applications. The battery mentioned in this application includes battery modules or battery packs. Multiple battery cells 100 can be connected in series, parallel, or a combination thereof; a combination of series and parallel connections refers to a mix of both. The battery device 10 may also be called a battery pack. In the embodiments of this application, multiple battery cells 100 can directly form a battery pack, or they can first be formed into battery modules, and then the battery modules can be assembled into a battery pack.

[0082] Please refer to Figure 2 , Figure 2 This is an exploded view of the battery device 10 in some embodiments of this application. Figure 2 In this configuration, the battery device 10 may include multiple battery modules, a thermal management component 200, and a housing 300.

[0083] The thermal management component 200 is used to regulate the temperature of the battery cells 100. The thermal management component 200 is a component used to contain a heat exchange medium to regulate the temperature of multiple battery cells 100. The heat exchange medium can be a liquid or a gas, and temperature regulation refers to heating or cooling the multiple battery cells 100. When cooling or lowering the temperature of the battery cells 100, the thermal management component 200 is used to contain a cooling fluid to lower the temperature of the multiple battery cells 100. In this case, the thermal management component 200 can also be called a cooling component, a cooling system, or a cooling plate, etc., and the fluid it contains can also be called a cooling medium or cooling fluid, more specifically, a coolant or a cooling gas. Alternatively, the thermal management component 200 can also be used to heat the multiple battery cells 100 to raise their temperature. For example, the heat exchange medium can be circulating to achieve better temperature regulation. Another example is that the fluid can be water, a mixture of water and ethylene glycol, or air, etc.

[0084] In some embodiments, with Figure 2 For example, the thermal management component 200 is housed within the housing 300. For instance, the thermal management component 200 is disposed between the battery cell 100 and the bottom wall of the housing 300, the bottom wall serving to support the battery cell 100.

[0085] In some embodiments, the thermal management component 200 is located outside the housing 300 (not shown in the figure). In some embodiments, the thermal management component 200 is located on the side of the bottom wall of the housing 300 opposite to the battery cell 100.

[0086] Multiple battery modules are housed inside the housing 300. The housing 300 is used to house individual battery cells 100 to prevent liquids or other foreign objects from affecting the charging or discharging of the individual battery cells 100. The housing 300 can be a simple three-dimensional structure such as a single cuboid, cylinder, or sphere, or it can be a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres. This embodiment of the application is not limited in this regard. The material of the housing 300 can be an alloy material such as aluminum alloy or iron alloy, or a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin. This embodiment of the application is also not limited in this regard.

[0087] In some embodiments, the housing 300 may include a first portion 301 and a second portion 302, which overlap each other, and together define a space for accommodating the battery cell 100. The second portion 302 may be a hollow structure with one open end, and the first portion 301 may be a plate-like structure, with the first portion 301 covering the open side of the second portion 302, so that the first portion 301 and the second portion 302 together define the space for accommodating the battery cell 100. Alternatively, the first portion 301 and the second portion 302 may both be hollow structures with one open side, with the open side of the first portion 301 covering the open side of the second portion 302.

[0088] As an example, the housing 300 may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are respectively connected to the frame, forming a closed space inside the housing to accommodate the battery cells 100. For example, the top cover and frame may constitute a first part 301, and the bottom plate may constitute a second part 302. Again, for example, the top cover may constitute the first part 301, and the frame and bottom plate may constitute the second part 302. No specific limitations are imposed here.

[0089] As an example, the housing 300 can be part of the vehicle's chassis structure. For instance, the housing's top cover can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0090] A battery module may include multiple battery cells 100. These battery cells 100 can be connected in series, parallel, or in a mixed configuration to form a battery module, which can then be connected in series, parallel, or in a mixed configuration to form a battery. In this application, the battery cell 100 may include lithium-ion batteries, sodium-ion batteries, or magnesium-ion battery devices, etc., and this application is not limited in this respect. The battery cell 100 may be cylindrical, flat, cuboid, or other shapes, etc., and this application is not limited in this respect either. In some embodiments, the battery device 10 may also include a busbar component, through which multiple battery cells 100 can be electrically connected to each other to achieve series, parallel, or mixed configurations of the multiple battery cells 100. The busbar component may be a metallic conductor, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc., and is not specifically limited here.

[0091] Please refer to Figure 3 , Figure 3 This is an exploded structural diagram of a battery cell 100 in some embodiments of this application. The battery cell 100 refers to the smallest unit constituting the battery device 10. For example... Figure 3 The battery cell 100 includes a battery cell body 110. The battery cell body 110 includes a housing 111, an electrode assembly 112, and other functional components.

[0092] The housing 111 is a component used to form the internal environment of the battery cell 100. The housing 111 may include a casing 1111 and an end cap 1112. The casing 1111 is a component used to mate with the end cap 1112 to form the internal environment of the battery cell 100. The casing 1111 and the end cap 1112 may be separate components. An opening may be provided on the casing 1111, and the end cap 1112 may be used to close the opening to form the internal environment of the battery cell 100. Alternatively, the end cap 1112 and the casing 1111 may be integral.

[0093] End cap 1112 refers to a component that can be closed onto the opening of housing 1111 to isolate the internal environment of battery cell 100 from the external environment. End cap 1112 may be provided with functional components such as electrode terminals 1101. Electrode terminals 1101 can be used for electrical connection with electrode assembly 112 to output or input electrical energy to battery cell 100. In some embodiments, end cap 1112 may also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 100 reaches a threshold. In some embodiments, end cap 1112 may also be provided with an injection hole for injecting electrolyte into battery cell 100. Of course, electrode terminals 1101 and injection holes may also be provided on housing 1111. In some embodiments, housing 1111 and / or end cap 1112 may also be provided with a pressure relief mechanism. The pressure relief mechanism is used to release internal pressure when the internal pressure or temperature of battery cell 100 reaches a threshold, thereby improving the safety performance of battery cell 100.

[0094] Electrode assembly 112 is the component in the battery cell 100 where the electrochemical reaction occurs. The housing 111 may contain one or more electrode assemblies 112. Electrode assembly 112 is mainly formed by stacking positive and negative electrode plates, and typically a separator is provided between the positive and negative electrode plates. The electrode assembly can be a wound structure or a stacked structure; no specific limitation is made here. The tabs of the positive and negative electrode plates are respectively connected to different electrode terminals 1101. The separator is used to isolate the positive and negative electrode plates and prevent electrons within the battery cell 100 from freely passing through, allowing ions in the electrolyte to flow freely between the positive and negative electrode plates. The separator can be a thin film made of materials such as polyethylene (PE) or polypropylene (PP). The separator can also be a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrode plates, simultaneously serving to transport ions and isolate the positive and negative electrodes.

[0095] In some embodiments, the battery cell 100 also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The electrolyte can be liquid, gel, or solid. No specific limitations are imposed here.

[0096] In some embodiments, please continue to refer to Figure 3 The battery cell 100 also includes an insulating component 120. The insulating component covers the outer surface of the housing 111, serving as an insulating protection. As an example, the insulating component 120 can be a blue film. As an example, the insulating component 120 can be a cover structure.

[0097] According to some embodiments of this application, please refer to Figures 4 to 8 , Figure 4 This is a top view of the thermal management component 200 in some embodiments of this application. Figure 5 This is a bottom view of the thermal management component 200 in some embodiments of this application. Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure with the mid-section view along the direction of A1-A1. Figure 7 for Figure 6 A magnified schematic diagram of the local structure at point G1. Figure 8 for Figure 7 The enlarged structural diagram at point G2 shows that this application provides a battery device 10, including a battery cell 100 and a thermal management component 200. The thermal management component 200 includes a body 210 and a first protective layer 220. The body 210 is used for heat exchange with the battery cell 100, and the first protective layer 220 is disposed on the side of the body 210 facing the battery cell 100. The electrode potential of the first protective layer 220 is configured to be lower than the electrode potential of the body 210.

[0098] The battery cell 100 and the thermal management component 200 can be understood with reference to the situations illustrated in some of the foregoing embodiments, and will not be repeated here. The thermal management component 200 is used to regulate the temperature of the battery cell 100. The first protective layer 220 of the thermal management component 200 is a layer structure used to protect the body 210 and reduce corrosion of the body 210.

[0099] Electrode potential is a physical quantity that measures the ease with which a metal (or other conductor) loses electrons (is oxidized) in an electrolyte environment, essentially reflecting the metal's tendency to undergo electrochemical corrosion. Metals with lower electrode potentials are more prone to corrosion due to electron loss. Conversely, metals with higher electrode potentials are less susceptible to corrosion. Electrode potential can be understood as corrosion potential. The electrode potential of the first protective layer 220 is lower than that of the body 210, meaning that the electrochemical activity of the first protective layer 220 is higher than that of the body 210, and the first protective layer 220 is more likely to lose electrons and be corroded than the body 210. When both the first protective layer 220 and the body 210 are in an electrolyte environment (such as in contact with water or corrosive liquids), the first protective layer 220, as a sacrificial structure, preferentially undergoes oxidation and is corroded, thereby reducing the risk of corrosion of the body 210. Therefore, the first protective layer 220 actively bears corrosion loss, reduces the risk of the main body 210 being directly corroded, delays the damage to the main body 210, and can significantly extend the service life of the thermal management component 200 and improve the reliability of the thermal management component 200.

[0100] As an example, the first protective layer 220 can be made of aluminum alloy. Further, it can be an aluminum alloy containing zinc, carbon, copper, or other materials, thereby reducing the electrode potential of the first protective layer 220. For example, the first protective layer 220 can be made of 7072 aluminum alloy. The first protective layer 220 can be coated on the side of the body 210 facing the battery cell 100. The first protective layer 220 can also be connected to the body 210 by hot pressing, rolling, or other methods; no specific limitations are imposed here.

[0101] Please refer to Figures 9 to 12 , Figure 9 This is an exploded structural diagram showing the cooperation between the housing 300 and the thermal management component 200 in some embodiments of this application. Figure 10 for Figure 9 A top view of the structure after removing the top cover 312. Figure 11 for Figure 10 A schematic diagram showing the cross-sectional structure along the A2-A2 direction and its alignment with the battery cell 100. Figure 12 for Figure 11 The enlarged structural diagram at point G3 shows that the battery device 10 also includes a housing 300, which comprises a main body 310 and a bottom cover 320. The main body 310 includes a frame 311 and a top cover 312. The frame 311 has a top opening k1 and a bottom opening k2. The thermal management component 200 is connected to the frame 311 and closes the bottom opening k2. The top cover 312 closes the top opening k1 of the frame 311. The top cover 312, the frame 311, and the thermal management component 200 together define a receiving cavity Q, within which the battery cell 100 is located. The bottom cover 320 is located on the side of the thermal management component 200 opposite to the receiving cavity Q and is connected to the frame 311.

[0102] The frame 311 can be generally arranged in a square ring, a rectangular ring, or other ring shapes. As an example, the frame 311 may include four side plates, which can be extruded sheet profiles. The four side plates are welded together circumferentially to form the frame 311, without specific limitations. The top cover 312 can be welded to the frame 311 or connected by fasteners. The bottom cover 320 can be welded to the frame 311 or connected by fasteners. In some embodiments, the top cover 312 and the frame 311 can be regarded as the first part 301 mentioned above, and the bottom cover can be regarded as the second part 302 mentioned above. Unlike some of the aforementioned embodiments, the receiving cavity Q is defined by the top cover 312, the frame 311, and the thermal management component 200.

[0103] For example, the top side and the bottom side of the frame 311 are two sides of the frame 311 that are opposite to each other along the third direction F3.

[0104] For example, recessed structures (not shown in the figure) and raised structures (not shown in the figure) can be provided on the bottom guard plate 320, which can further improve the structural strength of the bottom guard plate 320, thereby helping to further improve the reliability of the enclosure 300.

[0105] Therefore, by providing a first protective layer 220 on the side of the thermal management component 200 facing the battery cell 100, and making the electrode potential of the first protective layer 220 lower than that of the body 210, the first protective layer 220 can undergo electrochemical corrosion before the body 210 during electrochemical corrosion, thereby protecting the body 210 and reducing the risk of leakage of the heat exchange medium inside the body 210 from the side facing the battery cell 100 after corrosion. The housing 300 is configured to include a housing body 310 and a bottom protective plate 320, and the housing body 310 is configured to include a frame 311 and a top cover 312. The frame 311 and the top cover 312 can be manufactured separately and then assembled into the housing body 310. Since the thermal management component 200 and the housing body 310 together define the receiving cavity Q, and the battery cell 100 is located within the receiving cavity Q, the thermal management component 200 carries the battery cell 100 and can directly exchange heat with the battery cell 100. Since the bottom protective plate 320 is located on the bottom side of the thermal management component 200, it can protect the thermal management component 200. This installation method not only allows for direct connection between the thermal management component 200 and the frame 311, simplifying installation and improving manufacturing efficiency, but also helps improve the space utilization within the housing 300, thereby increasing the energy density of the battery device 10. Furthermore, referring to reference... Figure 13 , Figure 13 for Figure 12 A partially enlarged structural diagram at point G4 shows that even if water vapor enters the receiving cavity Q via the connection between the thermal management component 200 and the frame 311 (for example, water vapor along...), Figure 13 (The path R shown in the diagram enters the battery cell 100). Since the main body 210 has a first protective layer 220 on the side facing the battery cell 100, the reliability risk caused by corrosion can be reduced through the first protective layer 220. Therefore, the battery device 10 provided in this application embodiment can improve the energy density of the battery device 10 while taking into account reliability and manufacturing efficiency.

[0106] It should be noted that methods for measuring electrode potential include, but are not limited to, open circuit potential (OCP) measurement, polarization curve method, and polarization resistance method. Electrochemical measurement equipment includes, but is not limited to, pitting potential testers and portable rapid corrosion testers.

[0107] An exemplary method for measuring electrode potential is as follows: First, select the metal material to be tested as the working electrode, clean the surface of the metal material, and remove oil, dust, and other contaminants. Select an electrode with a stable potential as the reference electrode, such as a saturated calomel electrode (SCE), a silver / silver chloride electrode (Ag / AgCl), or a standard hydrogen electrode (SHE). Select an auxiliary electrode, which is used for current flow; the auxiliary electrode is typically made of high-purity carbon rods or platinum wires. Select or prepare an electrolyte that matches the measurement environment. Immerse the working electrode, reference electrode, and auxiliary electrode in the electrolyte. Connect the electrochemical measurement equipment, and allow the working electrode to stabilize in the electrolyte without an external current, then record the potential of the working electrode relative to the reference electrode. This potential change curve over time is called the open circuit potential (OCP) time curve. Record the change of OCP over time until a steady state is reached; the stable OCP can be considered the electrode potential of the metal material. Maintain the stability of temperature, pH, and other environmental factors during the measurement process.

[0108] Based on some embodiments of this application, please continue to refer to Figures 4 to 8 The main body 210 includes a first plate 211 and a second plate 212 stacked together. The second plate 212 is located on the side of the first plate 211 opposite to the battery cell 100. The sides of the first plate 211 and the second plate 212 opposite to each other define a flow channel P for accommodating the heat exchange medium. A first protective layer 220 is disposed on the side of the first plate 211 opposite to the second plate 212. The electrode potential of the first protective layer 220 is lower than the electrode potential of the first plate 211.

[0109] The first plate 211 and the second plate 212 are generally plate-shaped components. For example, with... Figures 4 to 8 Taking the illustrated directions as an example, the first direction F1 and the second direction F2 are the length and width directions of the thermal management component 200, respectively, and the third direction F3 is the thickness direction of the thermal management component 200. The first direction F1, the second direction F2, and the third direction F3 are all perpendicular to each other. The first plate 211 has two surfaces that are arranged opposite each other along the third direction F3, and these two surfaces can be planes. The first protective layer 220 is provided on the surface of the first plate 211 that is arranged along the third direction F3 and faces the battery cell 100.

[0110] The materials of the first plate 211 and the second plate 212 can be the same or different. For example, the materials of the first plate 211 and the second plate 212 can be stainless steel, copper, aluminum alloy, etc. For instance, the materials of the first plate 211 and the second plate 212 can be aluminum-based materials. In some embodiments, the materials of the first plate 211 and the second plate 212 can be 3-series aluminum alloys. In some embodiments, the materials of the first plate 211 and the second plate 212 can be 3003 alloy, which refers to an aluminum-manganese alloy, mainly composed of aluminum and manganese, and may also contain small amounts of magnesium and iron.

[0111] By configuring the body 210 as a stacked structure of a first plate 211 and a second plate 212, heat exchange can be achieved not only through the flow channel P defined by the first plate 211 and the second plate 212, but also by facilitating the fabrication of the body 210. By setting the electrode potential of the first protective layer 220 to be lower than that of the first plate 211, the first protective layer 220 can undergo electrochemical corrosion before the first plate 211 during electrochemical corrosion, thereby protecting the first plate 211 and reducing the risk of leakage of the heat exchange medium from the first plate 211 to the battery cell 100 after corrosion, thus improving the reliability of the battery device 10.

[0112] Based on some embodiments of this application, please continue to refer to Figure 8 The ratio of the thickness of the first protective layer 220 to the thickness of the first plate 211 is 0.07 to 0.12.

[0113] The thickness of the first protective layer 220 is a first thickness d1, and the thickness of the first plate 211 is a second thickness d2. The ratio of the first thickness d1 to the second thickness d2 is 0.07 to 0.12. For example, this ratio can be 0.07, 0.08, 0.09, 0.1, 0.11, or 0.12. Of course, this ratio can be any other value within the range of 0.07 to 0.12, and no specific limitation is made here.

[0114] By controlling the ratio of the thickness of the first protective layer 220 to the thickness of the first plate 211, not only is the first protective layer 220 not too thin, thus making the first plate 211 less susceptible to through-corrosion during electrochemical corrosion, but the first protective layer 220 is also not too thick, thereby improving the energy density of the battery device 10. Therefore, the battery device 10 can achieve both a certain level of reliability and a certain level of energy density.

[0115] Based on some embodiments of this application, please continue to refer to Figure 8The ratio of the thickness of the first protective layer 220 to the thickness of the first plate 211 is 0.09 to 0.11. That is, the ratio of the first thickness d1 to the second thickness d2 is 0.07 to 0.12. For example, this ratio can be 0.09, 0.093, 0.095, 0.099, 0.1, 0.105, or 0.11. For example, the ratio of the first thickness d1 to the second thickness d2 is 0.1. Of course, this ratio can be any other value within the range of 0.09 to 0.11, and no specific limitation is made here.

[0116] By further controlling the ratio of the thickness of the first protective layer 220 to the thickness of the first plate 211, not only can the corrosion resistance of the first protective layer 220 be further improved, but the impact on the mechanical properties of the plate can also be minimized, making the protective effect and the plate's own function more synergistic, and further improving the energy density of the battery device 10.

[0117] Based on some embodiments of this application, please continue to refer to Figure 8 The material of the first protective layer 220 includes one of aluminum-zinc alloy, zinc-aluminum-magnesium alloy, and zinc-iron alloy.

[0118] Because zinc has a low electrode potential, it is more prone to losing electrons and undergoing oxidation corrosion in an electrolyte environment. This causes the corrosion potential of the first protective layer 220, which contains zinc, to shift towards the lower potential of zinc. When the corrosion potential of the first protective layer 220 decreases due to zinc, its ability to be preferentially corroded is enhanced, thus providing more reliable protection for the substrate 210. Including aluminum in the material of the first protective layer 220 improves its high-temperature resistance and oxidation resistance. Including magnesium enhances its resistance to salt spray corrosion. Including iron improves the bonding between the first protective layer 220 and the substrate 210. Furthermore, the alloy composition facilitates the formation of a dense oxide layer, thereby slowing down its own corrosion rate.

[0119] Thus, the above alloy composition can form a more stable protective layer with good corrosion resistance, processing adaptability and environmental adaptability, which can more effectively resist the erosion of corrosive media and improve the reliability and stability of thermal management components 200.

[0120] Based on some embodiments of this application, please continue to refer to Figure 8 The thickness of the first protective layer 220 is 50 μm to 100 μm.

[0121] For example, the first thickness d1 can be 50μm, 55μm, 60μm, 65μm, 70μm, 72μm, 76μm, 80μm, 90μm, 95μm, 98μm, or 100μm. Of course, the first thickness d1 can also be any other value in the range of 50μm to 100μm, and no specific limitation is made here.

[0122] By controlling the thickness of the first protective layer 220, not only is the first protective layer 220 not too thin, thus preventing the body 210 of the thermal management component 200 from being penetrated and corroded during electrochemical corrosion, but the first protective layer 220 is also not too thick, which helps to improve the energy density of the battery device 10. Therefore, the battery device 10 can have a certain level of reliability while also having a certain energy density.

[0123] Based on some embodiments of this application, please continue to refer to Figures 5 to 8 The thermal management component 200 also includes a second protective layer 230. The second protective layer 230 is disposed on the side of the body 210 away from the battery cell 100, and the electrode potential of the second protective layer 230 is configured to be lower than the electrode potential of the body 210.

[0124] The understanding and implementation of electrode potentials can be referred to the contents illustrated in the foregoing embodiments, and will not be repeated here. The electrode potential of the second protective layer 230 is lower than that of the main body 210, which can also be understood by referring to the fact that the electrode potential of the first protective layer 220 is lower than that of the main body 210, and will not be repeated here. The material and setting method of the second protective layer 230 can also be understood by referring to the material and setting method of the first protective layer 220, and will not be repeated here.

[0125] By providing a second protective layer 230 on the side of the body 210 of the thermal management component 200 away from the battery cell 100, and making the electrode potential of the second protective layer 230 lower than that of the body 210, the second protective layer 230 can undergo electrochemical corrosion before the body 210 when electrochemical corrosion occurs. This can protect the body 210, reduce the risk of leakage of the heat exchange medium inside the body 210 from the side of the body 210 away from the battery cell 100 after corrosion, and thus improve the reliability of the battery device 10.

[0126] Based on some embodiments of this application, please continue to refer to Figures 4 to 8The main body 210 includes a first plate 211 and a second plate 212 stacked together. The second plate 212 is located on the side of the first plate 211 opposite to the battery cell 100. The sides of the first plate 211 and the second plate 212 opposite to each other define a flow channel P for accommodating the heat exchange medium. A first protective layer 220 is disposed on the side of the first plate 211 opposite to the second plate 212, and the electrode potential of the first protective layer 220 is lower than the electrode potential of the first plate 211. A second protective layer 230 is disposed on the side of the second plate 212 opposite to the first plate 211, and the electrode potential of the second protective layer 230 is lower than the electrode potential of the second plate 212.

[0127] The understanding and related implementation methods of the first plate 211 and the second plate 212 can be referred to the situations illustrated in some of the foregoing embodiments, and will not be repeated here.

[0128] By configuring the body 210 as a stacked structure of a first plate 211 and a second plate 212, heat exchange can be achieved not only through the flow channel P defined by the first plate 211 and the second plate 212, but also by facilitating the fabrication of the body 210. By setting the electrode potential of the first protective layer 220 to be lower than that of the first plate 211, the first protective layer 220 can undergo electrochemical corrosion before the first plate 211 during electrochemical corrosion, thereby protecting the first plate 211 and reducing the risk of heat exchange medium leakage to the battery cell 100 after corrosion of the first plate 211. Similarly, by setting the electrode potential of the second protective layer 230 to be lower than that of the second plate 212, the second protective layer 230 can undergo electrochemical corrosion before the second plate 212 during electrochemical corrosion, thereby protecting the second plate 212 and reducing the risk of heat exchange medium leakage after corrosion of the second plate 212. Therefore, the reliability of the battery device 10 can be improved.

[0129] Based on some embodiments of this application, please continue to refer to Figure 8 The ratio of the thickness of the second protective layer 230 to the thickness of the second plate 212 is 0.07 to 0.12.

[0130] The second protective layer 230 has a third thickness d3, and the second plate 212 has a fourth thickness d4. The ratio of the third thickness d3 to the fourth thickness d4 is between 0.07 and 0.12. For example, this ratio can be 0.07, 0.08, 0.09, 0.1, 0.11, or 0.12. Of course, this ratio can be any other value within the range of 0.07 to 0.12, and no specific limitation is made here.

[0131] By controlling the ratio of the thickness of the second protective layer 230 to the thickness of the second plate 212, not only is the second protective layer 230 not too thin, thus making the second plate 212 less susceptible to through-corrosion during electrochemical corrosion, but the second protective layer 230 is also not too thick, thereby improving the energy density of the battery device 10. Therefore, the battery device 10 can achieve both a certain level of reliability and a certain level of energy density.

[0132] Based on some embodiments of this application, please continue to refer to Figure 8 The ratio of the thickness of the second protective layer 230 to the thickness of the second plate 212 is 0.09 to 0.11. That is, the ratio of the third thickness d3 to the fourth thickness d4 is 0.07 to 0.12. For example, this ratio can be 0.09, 0.093, 0.095, 0.099, 0.1, 0.105, or 0.11. For instance, the ratio of the third thickness d3 to the fourth thickness d4 is 0.1. Of course, this ratio can be any other value within the range of 0.09 to 0.11, and no specific limitation is made here.

[0133] By further controlling the ratio of the thickness of the second protective layer 230 to the thickness of the second plate 212, not only can the corrosion resistance of the second protective layer 230 be further improved, but the impact on the mechanical properties of the plate can also be minimized, making the protective effect and the plate's own function more synergistic, and further improving the energy density of the battery device 10.

[0134] Based on some embodiments of this application, please continue to refer to Figure 8 The material of the second protective layer 230 includes one of aluminum-zinc alloy, zinc-aluminum-magnesium alloy, and zinc-iron alloy.

[0135] The understanding of the material of the second protective layer 230 and its related implementation methods can be referred to the understanding of the material of the first protective layer 220 and its related implementation methods, and will not be repeated here.

[0136] Thus, the above alloy composition can form a more stable protective layer with good corrosion resistance, processing adaptability and environmental adaptability, which can more effectively resist the erosion of corrosive media and improve the reliability and stability of thermal management components 200.

[0137] Based on some embodiments of this application, please continue to refer to Figure 8 The thickness of the second protective layer 230 is 50 μm to 100 μm.

[0138] For example, the third thickness d3 can be 50μm, 55μm, 60μm, 65μm, 70μm, 72μm, 76μm, 80μm, 90μm, 95μm, 98μm, or 100μm. Of course, the third thickness d3 can also be any other value in the range of 50μm to 100μm, and no specific limitation is made here.

[0139] By controlling the thickness of the second protective layer 230, not only is the second protective layer 230 not too thin, thus preventing the body 210 of the thermal management component 200 from being penetrated and corroded during electrochemical corrosion, but the second protective layer 230 is also not too thick, thereby improving the energy density of the battery device 10. Therefore, the battery device 10 can achieve both a certain level of reliability and a certain level of energy density.

[0140] It should be noted that the thickness of the first protective layer 220 and the thickness of the second protective layer 230 can be the same or different. The material of the first protective layer 220 and the material of the second protective layer 230 can be the same or different. No specific restrictions are imposed here.

[0141] Based on some embodiments of this application, please continue to refer to Figures 6 to 8 The second plate 212 has a groove X on the side facing the first plate 211, and the first plate 211 and the groove X define the flow channel P.

[0142] By forming a groove X on the side of the second plate 212 facing the first plate 211, a flow channel P is formed with the first plate 211. This eliminates the need for an additional independent flow channel P component, simplifying the overall structural design and assembly process, saving space, and reducing costs. Furthermore, the layered and fitted structure of the first plate 211 and the second plate 212 improves the sealing performance of the flow channel P, reducing the risk of fluid leakage. In addition, the shape of the flow channel P can be flexibly adjusted according to the groove X design to adapt to different fluid flow rates and heat exchange requirements, enhancing the practicality and adaptability of the structure.

[0143] Of course, in some other embodiments, the first plate 211 may have a groove X on the side facing the second plate 212. It can be understood that when the second plate 212 has a groove X on the side facing the first plate 211, not only can the first plate 211 be set as a flat plate, thereby improving the thermal management effect of the battery cell 100, but it is also more conducive to saving space in the housing 300, thereby further improving the energy density of the battery device 10.

[0144] According to some embodiments of this application, please refer to Figure 14 , Figure 14The diagram shows a partial cross-sectional view of the thermal management component 200 in some other embodiments of this application. The thermal management component 200 also includes a welding layer 240. The welding layer 240 is disposed on the side of the first plate 211 facing the second plate 212, and the first plate 211 and the second plate 212 are welded together through the welding layer 240.

[0145] The weld layer 240 refers to an intermediate transition layer formed by welding at the connection interface between the first plate 211 and the second plate 212, used to achieve metallurgical bonding between the two. For example, the weld layer 240 is a brazing layer. Of course, the weld can also be a fusion weld or a pressure weld, and no specific limitation is made here.

[0146] Thus, by setting the welding layer 240, not only can a strong connection structure be formed, but the sealing performance and heat transfer efficiency can also be improved.

[0147] Based on some embodiments of this application, please continue to refer to Figure 14 The thermal management component 200 also includes an insulating layer 250, which is disposed on the side of the second plate 212 opposite to the first plate 211.

[0148] The insulating layer 250 may be made of materials including, but not limited to, polyethylene, polypropylene, polyvinyl chloride, chlorinated polyether, polyamide, cellulose, and resin. For example, the insulating layer 250 may be made of materials including, but not limited to, epoxy resin, polyurethane resin, and acrylic resin, without specific limitations.

[0149] Thus, by providing the insulating layer 250, the risk of short circuit between the thermal management component 200 and other components on the side facing away from the battery cell 100 can be reduced. When the second protective layer 230 is provided on the side of the second plate 212 facing away from the first plate 211, the insulating layer 250 is provided on the side of the second protective layer 230 facing away from the second plate 212. In this case, the insulating layer 250 can provide insulation protection for the second protective layer 230.

[0150] Based on some embodiments of this application, please continue to refer to Figures 11 to 13 The thermal management component 200 and the bottom guard plate 320 are located on the side of the frame 311 opposite to the top cover 312. That is, the thermal management component 200 and the bottom guard plate 320 are located on the bottom side of the frame 311. The thermal management component 200 and the bottom guard plate 320 are connected to the frame 311 via the connector 400.

[0151] The thermal management component 200 and the bottom guard plate 320 can be connected to the frame 311 via a connector 400, or the thermal management component 200 and the bottom guard plate 320 can be connected to the frame 311 via a connector 400, or the thermal management component 200 and the bottom guard plate 320 can be connected to the frame 311 via a connector 400, or the thermal management component 200 and the bottom guard plate 320 can be connected to the frame 311 via a connector 400; no specific limitation is made here. Figure 12 and Figure 13 The illustrated scenario only shows the case where the thermal management component 200 is connected to the frame 311 via the connector 400.

[0152] For example, the connector 400 may be a fastener, including but not limited to screws or bolts, without specific limitations.

[0153] As an example, connector 400 can be a self-tapping bolt, and FDS technology (i.e., self-tapping riveting technology) can be used to assemble housing 300 and thermal management component 200. This not only improves connection strength and sealing but also simplifies the assembly process and reduces assembly difficulty. Compared to welding or other methods, this effectively shortens the production cycle and improves production efficiency. Compared to using nuts or other connection structures, no space needs to be reserved for installation, which helps optimize the internal structure of battery device 10, improves space utilization, and thus increases the energy density of battery device 10.

[0154] Based on some embodiments of this application, please continue to refer to Figure 12 and Figure 13 The battery device 10 also includes a seal 500, which is disposed between the frame 311 and the thermal management component 200.

[0155] For example, the seal 500 is disposed between the frame 311 and the first plate 211.

[0156] For example, the seal 500 may be rubber, thermoplastic elastomer, foamed silicone, or an adhesive sealant, without any specific limitation herein.

[0157] Thus, by setting the seal 500, the sealing performance at the connection between the thermal management component 200 and the frame 311 can be further improved, reducing the risk of impurities such as water vapor entering the containment cavity Q, thereby further improving the reliability of the battery device 10.

[0158] Based on some embodiments of this application, please continue to refer to Figure 12 and Figure 13The battery device 10 also includes a filler 600. The filler 600 is provided between the thermal management component 200 and the frame 311; and / or, the filler 600 is provided between the bottom guard plate 320 and the thermal management component 200.

[0159] For example, Figure 12 and Figure 13 The illustration shows a situation where a filler 600 is provided between the thermal management component 200 and the frame 311, and a situation where a filler 600 is provided between the bottom guard plate 320 and the thermal management component 200.

[0160] When a filler 600 is provided between the thermal management component 200 and the frame 311, the filler 600 is used to fill and seal the gap between the frame 311 and the portion of the thermal management component 200 near the receiving cavity Q. When a filler 600 is provided between the bottom guard plate 320 and the thermal management component 200, the filler 600 is used to fill and seal the gap between the bottom guard plate 320 and the thermal management component 200.

[0161] For example, filler 600 may be made of foamed silicone.

[0162] Therefore, by setting the filler 600, the corresponding seams can be isolated and sealed, thereby better sealing the battery housing 300. When the material of the filler 600 can buffer force, the overall reliability and stability of the battery device 10 can be further improved.

[0163] Based on some embodiments of this application, please continue to refer to Figures 11 to 13 The battery cell 100 and the thermal management component 200 are insulated from each other.

[0164] This reduces the risk of a short circuit between the thermal management component 200 and the battery cell 100.

[0165] Based on some embodiments of this application, please continue to refer to Figure 3 , Figures 11 to 13 The battery cell 100 includes a battery cell body 110 and an insulating member 120 disposed outside the battery cell body 110. The battery cell body 110 is insulated from the thermal management component 200 by means of the insulating member 120.

[0166] The insulating member 120 can be understood and implemented with reference to the situations illustrated in some of the foregoing embodiments, and no specific limitations are made here. The insulating member 120 can cover the sides and bottom of the housing 1111 of the battery cell 100, thereby achieving insulation between the housing 1111 and the thermal management component 200. The specific covering method is not specifically limited here.

[0167] Since the battery cell body 110 is insulated from the thermal management component 200 by the insulating component 120 covering it, the conductive path between the battery cell body 110 and the thermal management component 200 can be blocked structurally, effectively reducing the risk of short circuit.

[0168] Of course, in some other embodiments, an insulating pad may also be provided between the battery cell 100 and the thermal management component 200, without specific limitations.

[0169] It should be noted that, compared to the method of spraying an insulating layer 250 on the side of the first plate 211 of the thermal management component 200 facing the battery cell 100, in the above technical solution, the sprayed insulating layer 250 is eliminated, and the insulation between the battery cell 100 and the thermal management component 200 is achieved by using the insulating component 120 of the battery cell 100, which helps to reduce manufacturing costs.

[0170] Based on some embodiments of this application, please continue to refer to Figure 3 , Figure 8 , Figure 9 , Figure 12 and Figure 13 The battery device 10 includes a battery cell 100, a thermal management component 200, and a housing 300. The thermal management component 200 includes a body 210 and a first protective layer 220. The body 210 is used for heat exchange with the battery cell 100. The first protective layer 220 is located on the side of the body 210 facing the battery cell 100, and the electrode potential of the first protective layer 220 is configured to be lower than the electrode potential of the body 210. A second protective layer 230 is located on the side of the body 210 away from the battery cell 100, and the electrode potential of the second protective layer 230 is configured to be lower than the electrode potential of the body 210. The housing 300 includes a main body 310 and a bottom protective plate 320. The main body 310 includes a frame 311 and a top cover 312. The frame 311 has a top opening k1 and a bottom opening k2. The thermal management component 200 is connected to the frame 311 and closes the bottom opening k2. The top cover 312 closes the top opening k1 of the frame 311. The top cover 312, the frame 311, and the thermal management component 200 together define a receiving cavity Q, in which the battery cell 100 is located. A bottom protective plate 320 is located on the side of the thermal management component 200 opposite to the receiving cavity Q, and the bottom protective plate 320 is connected to the frame 311. The battery cell 100 includes a battery cell body 110 and an insulating member 120 disposed outside the battery cell body 110. The battery cell body 110 is insulated from the thermal management component 200 by means of the insulating member 120.

[0171] Therefore, compared to placing the thermal management component 200 inside the housing 300 or outside the bottom protective plate 320, by configuring the housing 300 as a frame 311, top cover 312, and bottom protective plate 320, and placing the thermal management component 200 between the frame 311 and the bottom protective plate 320, the bottom protective plate 320 can protect the thermal management component 200, and the thermal management component 200 can be directly connected to the frame 311. This simplifies installation, improves manufacturing efficiency, and also helps to improve the space utilization within the housing 300, thereby increasing the energy density of the battery device 10. By setting the first protective layer 220 and the second protective layer 230, the risk of heat exchange medium leakage within the body 210 after corrosion can be reduced, thereby improving the reliability of the battery device 10. Meanwhile, since a first protective layer 220 is provided on the side of the thermal management component 200 body 210 facing the battery cell 100, even if moisture enters the receiving cavity Q through the connection between the thermal management component 200 and the frame 311, the first protective layer 220 can reduce the reliability risk caused by corrosion. At the same time, insulation between the battery cell 100 and the thermal management component 200 is achieved by the insulating member 120 covering the outer shell 111 of the battery cell 100, further reducing the risk of short circuits between the battery cell 100 and the thermal management component 200. Therefore, through the cooperation of the housing 300, the thermal management component 200, and the battery cell 100, not only can the reliability and energy density of the battery device 10 be further improved, but manufacturing costs can also be reduced and manufacturing efficiency increased.

[0172] According to some embodiments of this application, this application provides an electrical device including the battery device 10 in any of the above embodiments.

[0173] The advantages of the battery device 10 in any of the above embodiments are also present in this electrical device, and will not be repeated here.

[0174] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not 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 or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Battery cell (100); A thermal management component (200) includes a body (210) and a first protective layer (220). The body (210) is used for heat exchange with the battery cell (100). The first protective layer (220) is disposed on the side of the body (210) facing the battery cell (100). The electrode potential of the first protective layer (220) is configured to be lower than the electrode potential of the body (210). A housing (300) includes a main body (310) and a bottom cover (320); the main body (310) includes a frame (311) and a top cover (312); the frame (311) has a top side opening (k1) and a bottom side opening (k2); the thermal management component (200) is connected to the frame (311) and closes the bottom side opening (k2); the top cover (312) closes the top side opening (k1) of the frame (311); the top cover (312), the frame (311), and the thermal management component (200) together define a receiving cavity (Q); the battery cell (100) is located in the receiving cavity (Q); the bottom cover (320) is located on the side of the thermal management component (200) opposite to the receiving cavity (Q); the bottom cover (320) is connected to the frame (311).

2. The battery device according to claim 1, characterized in that, The body (210) includes a first plate (211) and a second plate (212) stacked together. The second plate (212) is located on the side of the first plate (211) away from the battery cell (100). The sides of the first plate (211) and the second plate (212) opposite to each other define a flow channel (P) for accommodating the heat exchange medium. The first protective layer (220) is disposed on the side of the first plate (211) opposite to the second plate (212), and the electrode potential of the first protective layer (220) is lower than the electrode potential of the first plate (211).

3. The battery device according to claim 2, characterized in that, The ratio of the thickness of the first protective layer (220) to the thickness of the first plate (211) is 0.07 to 0.

12.

4. The battery device according to claim 3, characterized in that, The ratio of the thickness of the first protective layer (220) to the thickness of the first plate (211) is 0.09 to 0.

11.

5. The battery device according to any one of claims 1-4, characterized in that, The material of the first protective layer (220) includes one of aluminum-zinc alloy, zinc-aluminum-magnesium alloy, and zinc-iron alloy.

6. The battery device according to any one of claims 1-4, characterized in that, The thickness of the first protective layer (220) is 50 μm to 100 μm.

7. The battery device according to any one of claims 1-4, characterized in that, The battery cell (100) and the thermal management component (200) are insulated from each other.

8. The battery device according to claim 7, characterized in that, The battery cell (100) includes a battery cell body (110) and an insulating member (120) disposed outside the battery cell body (110); The battery cell body (110) is insulated from the thermal management component (200) by means of the insulating member (120).

9. The battery device according to any one of claims 1-4, characterized in that, The thermal management component (200) also includes a second protective layer (230); The second protective layer (230) is disposed on the side of the body (210) away from the battery cell (100), and the electrode potential of the second protective layer (230) is configured to be lower than the electrode potential of the body (210).

10. The battery device according to claim 9, characterized in that, The body (210) includes a first plate (211) and a second plate (212) stacked together. The second plate (212) is located on the side of the first plate (211) away from the battery cell (100). The sides of the first plate (211) and the second plate (212) opposite to each other define a flow channel (P) for accommodating the heat exchange medium. The first protective layer (220) is disposed on the side of the first plate (211) away from the second plate (212), and the electrode potential of the first protective layer (220) is lower than the electrode potential of the first plate (211); the second protective layer (230) is disposed on the side of the second plate (212) away from the first plate (211), and the electrode potential of the second protective layer (230) is lower than the electrode potential of the second plate (212).

11. The battery device according to claim 10, characterized in that, The ratio of the thickness of the second protective layer (230) to the thickness of the second plate (212) is 0.07 to 0.

12.

12. The battery device according to claim 11, characterized in that, The ratio of the thickness of the second protective layer (230) to the thickness of the second plate (212) is 0.09 to 0.

11.

13. The battery device according to claim 2 or 10, characterized in that, The second plate (212) has a groove (X) on the side facing the first plate (211), and the first plate (211) and the groove (X) define the flow channel (P).

14. The battery device according to claim 9, characterized in that, The material of the second protective layer (230) includes one of aluminum-zinc alloy, zinc-aluminum-magnesium alloy, and zinc-iron alloy.

15. The battery device according to claim 9, characterized in that, The thickness of the second protective layer (230) is 50 μm to 100 μm.

16. The battery device according to any one of claims 1-4, characterized in that, The thermal management component (200) and the bottom guard plate (320) are located on the side of the frame (311) away from the top cover (312), and the thermal management component (200) and the bottom guard plate (320) are connected to the frame (311) by a connector (400).

17. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-16.

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