Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, and the battery device comprises a battery box body, the battery box body comprises a bottom plate, and the bottom plate is provided with a containing groove; the heat exchange tube is arranged in the accommodating groove; and the protection plate is arranged on the side, away from the heat exchange pipe, of the bottom plate, and the protection plate is fixedly connected with the bottom plate. In the technical scheme of the embodiment of the invention, the heat exchange tube with lower cost is adopted for heat exchange, the cost of the battery device can be reduced, and the heat exchange tube, the bottom plate and the protection plate are fixedly connected into an integrated sandwich structure and then are directly used for the battery box body, so that integrated supply can be realized, the mounting steps are reduced, and the mounting process is simplified; and the number of parts required for installation can be reduced, so that the cost of the battery device can be reduced, the weight of the battery device can be reduced, and the strength and rigidity of the battery box body can be improved.

Description

Technical Field

[0001] This application relates to the field of batteries, specifically to a battery device and an electrical device. Background Technology

[0002] 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.

[0003] In related technologies, existing battery devices generally use cold plates for cooling, but cold plates are expensive, which leads to high battery device costs. In addition, the cold plates need to be bolted to the outer frame and bottom protective plate of the battery box, resulting in many installation steps, complex installation processes, and a large number of parts required for installation, which leads to high battery device costs and heavy weight. Utility Model Content

[0004] In view of the above problems, this application provides a battery device and an electrical device that can solve the problems of high cost and heavy weight of battery devices.

[0005] In a first aspect, this application provides a battery device, comprising: a battery housing, the battery housing comprising: a base plate defining a receiving groove; a heat exchange tube disposed in the receiving groove; and a protective plate disposed on the side of the base plate opposite to the heat exchange tube, and the protective plate being fixedly connected to the base plate.

[0006] According to the battery device of the present application embodiment, heat exchange is carried out using a lower-cost heat exchange tube, which can reduce the cost of the battery device. By fixing the heat exchange tube, the base plate and the protective plate together into a sandwich structure, it can be directly used in the battery box. This can achieve integrated supply, reduce installation steps, simplify the installation process, and reduce the number of parts required for installation, thereby reducing the cost of the battery device, reducing the weight of the battery device, and improving the strength and rigidity of the battery box.

[0007] According to some embodiments of this application, the base plate is provided with a limiting protrusion, the heat exchange tube includes multiple tube segments, the multiple tube segments are connected in sequence, a clearance space is formed between adjacent multiple tube segments, and at least a portion of the limiting protrusion is located in the clearance space.

[0008] In the above technical solution, by setting multiple pipe sections and limiting protrusions, the limiting protrusions are used to limit the multiple pipe sections. On the one hand, this increases the length of the heat exchange tube, increases the contact area and contact stability between the heat exchange tube and the battery cell, and improves the heat exchange effect. On the other hand, it increases the contact area between the heat exchange tube and the base plate, increases the reliability of the connection between the heat exchange tube and the base plate, and improves the stability of the entire battery device.

[0009] According to some embodiments of this application, the base plate includes a first support section and a second support section, the second support section defining the receiving groove, the first support section being disposed on the outer periphery of the second support section, and the surface of the heat exchange tube facing away from the protective plate not exceeding the surface of the first support section facing away from the protective plate.

[0010] In the above technical solution, by placing the heat exchange tube in the second support section and ensuring that the heat exchange tube does not protrude from the outer surface of the first support section, the heat exchange effect on the battery cell can be improved, the pressure on the heat exchange tube can be reduced to protect the heat exchange tube, and the space occupied inside the battery device can be reduced to ensure the energy density of the battery device.

[0011] According to some embodiments of this application, a portion of the second support segment arches toward the side opposite to the protective plate to form the limiting protrusion.

[0012] In the above technical solution, after the heat exchange tube is placed in the receiving tank, the heat exchange tube is limited by the limiting protrusion. The limiting protrusion is not easy to move relative to the receiving tank, so that the limiting protrusion can effectively restrict the heat exchange tube in the receiving tank, and the limiting effect of the heat exchange tube is better.

[0013] According to some embodiments of this application, the receiving groove is filled with colloid, and the side surface of the colloid opposite to the protective plate is flush with the side surface of the first support section opposite to the protective plate.

[0014] In the above technical solution, by making the side surface of the colloid away from the protective plate flush with the side surface of the first support section away from the protective plate, the side surface of the base plate away from the protective plate can be formed into a plane, so as to support the battery cell on the plane, which is beneficial to improve the support effect of the battery cell, reduce stress concentration, and protect the heat exchange tube.

[0015] According to some embodiments of this application, the protective plate has a relief groove recessed in the direction away from the base plate, and the portion of the base plate having the receiving groove corresponds to the position of the relief groove and at least a portion extends into the relief groove.

[0016] In the above technical solution, by setting a relief groove on the protective plate that corresponds to the position of the receiving groove, and by having at least a part of the receiving groove extend into the relief groove, the protective plate can cover the part of the bottom plate with the receiving groove, thereby improving the protective effect of the protective plate on the bottom plate and the heat exchange tube.

[0017] According to some embodiments of this application, the protective plate and the base plate are connected by a hot pressing process.

[0018] In the above technical solution, the protective plate and the base plate are connected by hot pressing, which not only makes the connection between the protective plate and the base plate firm, but also improves the connection efficiency. Moreover, no additional connecting parts are required, the connection cost is low, which helps to improve the manufacturing efficiency of the battery device and reduce the manufacturing cost of the battery device.

[0019] According to some embodiments of this application, the protective plate is a carbon fiber material component or a composite material component.

[0020] In the above technical solutions, using carbon fiber or composite materials to make protective plates can effectively reduce the weight of the battery box, thereby reducing the overall weight of the battery device. It also helps to improve the strength, rigidity, and corrosion resistance of the protective plates, thereby improving the strength, rigidity, and corrosion resistance of the sandwich structure to protect the individual battery cells and improve the safety of the battery device.

[0021] According to some embodiments of this application, the base plate is a metal part, and a portion of the base plate is bent to form the receiving groove.

[0022] In the above technical solution, using metal parts to make the base plate can ensure the structural strength of the base plate, which is conducive to improving the strength of the battery box to protect the battery cells. In addition, the base plate is easy to process, which helps to reduce the manufacturing difficulty of the battery box and improve the manufacturing efficiency of the battery box.

[0023] According to some embodiments of this application, the heat exchange tube is welded to the base plate.

[0024] In the above technical solution, the heat exchange tube and the base plate are fixed together by welding. The welding method has a lower cost and a more solid connection.

[0025] According to some embodiments of this application, the battery housing further includes: an outer frame, the outer frame being disposed on the outer periphery of the base plate, and the outer frame being connected to the base plate and / or the protective plate.

[0026] In the above technical solution, at least one of the base plate and the protective plate is connected to the outer frame. Whether the outer frame is directly connected to the base plate, directly connected to the protective plate, or directly connected to both the base plate and the protective plate, the connection between the outer frame, the base plate, and the protective plate can be improved, and the installation process can be simplified. At the same time, the protective plate, as the outermost layer of the battery device, can absorb the impact energy first, which can reduce the deformation of the base plate when the battery device is impacted and improve the protective performance of the battery device.

[0027] According to some embodiments of this application, the base plate and / or the protective plate are connected to the outer frame by fasteners.

[0028] In the above technical solution, at least one of the base plate and the protective plate is connected to the outer frame by fasteners, which can ensure the connection effect between the outer frame, the base plate and the protective plate, and the connection is convenient and practical.

[0029] According to some embodiments of this application, the projection of the protective plate on the surface of the base plate is located within the base plate, and the base plate is welded to the outer frame.

[0030] In the above technical solution, by making the projection of the protective plate on the surface of the base plate located within the base plate, welding space can be provided for welding the base plate and the outer frame, making the welding of the base plate and the outer frame firm and improving the strength of the battery box.

[0031] Secondly, this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0032] 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

[0033] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments 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:

[0034] Figure 1 This is a schematic diagram of the structure of an electrical device provided in some embodiments of this application;

[0035] Figure 2 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application;

[0036] Figure 3 This is a partial structural schematic diagram of the battery housing provided in some embodiments of this application;

[0037] Figure 4 Exploded views of heat exchange tubes, base plates, and protective plates provided in some embodiments of this application;

[0038] Figure 5 A schematic diagram of the mating structure of the heat exchange tube, base plate and protective plate provided in some embodiments of this application;

[0039] Figure 6 yes Figure 5 A partial structural cross-sectional view along the direction shown by line AA;

[0040] Figure 7 This is a partial structural diagram of the base plate and protective plate according to some embodiments of this application.

[0041] Figure label:

[0042] Battery unit 1000; Electrical device 2000;

[0043] Battery housing 100; first part 110; second part 120; storage space 130; battery cell 200;

[0044] Base plate 10; First support section 11; Second support section 12; Receiving groove 121; Limiting protrusion 122;

[0045] Protective plate 15; clearance groove 151;

[0046] Outer frame 20;

[0047] Heat exchange device 30; heat exchange tube 31; tube section 311; flow channel 312; partition 3121; sub-flow channel 3122; heat exchange joint 32. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0050] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0051] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0052] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0053] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0054] In this application, "multiple" means two or more (including two).

[0055] In this application, a battery refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack. A battery may include a battery housing for encapsulating one or more battery cells or multiple battery modules. The battery housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0056] Battery cells may include lithium-ion rechargeable batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and this application embodiment is not limited to these. Battery cells may be cylindrical, flat, cuboid, or other shapes, etc., and this application embodiment is not limited to these. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and this application embodiment is not limited to these.

[0057] Currently, judging from market trends, the application of batteries is becoming increasingly widespread. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely 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 the application areas of power batteries, the market demand for them is also constantly increasing.

[0058] In some electrical devices, battery units are used for power supply. A battery unit includes a battery casing and individual battery cells housed within the casing. During operation, each battery cell generates heat. Therefore, the battery casing typically includes a heat exchanger. This heat exchanger uses a heat exchange medium to dissipate the heat generated by the battery cells, mitigating overheating and reducing its negative impact on battery life and performance. The heat exchanger in a battery unit is usually a cold plate. Cold plates are expensive, leading to a high overall cost for the battery unit. Furthermore, the cold plate needs to be bolted to the outer frame and bottom cover of the battery casing, resulting in numerous installation steps, a complex installation process, and a large number of parts required, contributing to the high cost and weight of the battery unit.

[0059] Based on this, this application proposes a battery device, including: a battery housing, the battery housing including: a base plate, the base plate defining a receiving groove; a heat exchange tube, the heat exchange tube being disposed in the receiving groove; and a protective plate, the protective plate being disposed on the side of the base plate opposite to the heat exchange tube, and the protective plate being fixedly connected to the base plate.

[0060] In the technical solution of this application embodiment, compared with the technical solution of using cold plate for heat exchange, this application uses heat exchange tubes with lower cost for heat exchange, which can reduce the cost of battery device. By fixing the heat exchange tube, base plate and protective plate into a sandwich structure, it can be directly used for battery box. This can achieve integrated supply, reduce installation steps, simplify installation process, and reduce the number of parts required for installation, thereby reducing the cost of battery device, reducing the weight of battery device, and improving the strength and rigidity of battery box.

[0061] The battery device 1000 disclosed in the embodiments of this application can be used, but is not limited to, in electrical devices 2000 such as vehicles, ships or aircraft. The power system of the electrical device 2000 can be composed of the battery device 1000 disclosed in this application, so as to improve the reliability of the electrical device 2000.

[0062] For example, the electrical device 2000 disclosed in this application embodiment may be, but is not limited to, vehicles, mobile phones, tablets, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles may be fuel vehicles, natural gas vehicles, new energy vehicles, or rail vehicles; new energy vehicles may be pure electric vehicles, hybrid vehicles, or range-extended vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric airplane toys, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0063] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application. The battery device 1000 can be used to power the vehicle, and the battery device 1000 can be disposed at the bottom, front, or rear of the vehicle. The battery device 1000 can be used to power the vehicle; for example, the battery device 1000 can serve as the vehicle's operating power source. The vehicle may also include a controller and a motor, the controller being used to control the battery device 1000 to supply power to the motor, for example, for the vehicle's starting, navigation, and operating power needs.

[0064] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the battery structure provided in some embodiments of this application.

[0065] The battery device 1000 includes a battery housing 100 and a battery cell 200. The battery housing 100 includes a first part 110 and a second part 120, and the battery cell 200 is accommodated between the first part 110 and the second part 120.

[0066] A battery cell 200 refers to the smallest unit that makes up a battery. For example, a battery cell 200 may include a casing, an electrode assembly, and an electrolyte. The casing is used to house the electrode assembly and the electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell 200 mainly relies on the movement of metal ions between the positive and negative electrode plates to function. The battery device 1000 may contain multiple battery cells 200, which can be connected in series, parallel, or in a mixed configuration via electrical connectors.

[0067] Below, please refer to the appendix. Figures 2-7The battery device 1000 according to an embodiment of this application includes a battery housing 1000, which includes a base plate 10, a heat exchange tube 31, and a protective plate 15. The base plate 10 defines a receiving groove 121, the heat exchange tube 31 is disposed in the receiving groove 121, and the protective plate 15 is disposed on the side of the base plate 10 opposite to the heat exchange tube 31, and the protective plate 15 is fixedly connected to the base plate 10.

[0068] The battery device 1000 may include a battery housing 100, battery cells 200, and a heat exchange device 30. The battery housing 100 may define a receiving space 130. The battery cells 200 may be disposed within the receiving space 130. The battery housing 100 may include a base plate 10 and may also include an outer frame 20. The outer frame 20 may surround the outer periphery of the base plate 10 and may cooperate with the base plate 10 to jointly define the receiving space 130.

[0069] like Figures 3-6 As shown, the heat exchange device 30 includes a heat exchange tube 31, which typically has a flow channel 312. The flow channel 312 is used to circulate the heat exchange medium, which is usually an insulating working fluid, such as air, deionized water, hydrocarbons, fluorinated liquids, refrigerants, etc. This can ensure the heat exchange effect of the heat exchange tube 31 and reduce the possibility of leakage of the battery device 1000 due to leakage of the heat exchange medium, thus helping to ensure the safety of the battery device 1000 in use.

[0070] The side of the base plate 10 closest to the receiving space 130 (e.g.) Figure 3 The upper side of the base plate 10 shown may be defined by a receiving groove 121, and the heat exchange tube 31 is located in the receiving groove 121 of the base plate 10, so that the heat exchange tube 31 and the base plate 10 are aligned along the thickness direction of the battery box 1000 (e.g., Figures 3-4 The overlapping of the heat exchange tubes (in the vertical direction) means that the heat exchange tubes 31 do not need to occupy additional space in this direction, which helps to reduce the volume of the battery device 1000, that is, it helps to miniaturize the battery device 1000, and can avoid the reduction of the energy density of the battery device 1000 to a certain extent.

[0071] The receiving groove 121 of the base plate 10 is usually connected to the receiving space 130 of the battery box 1000, that is, the side of the receiving groove 121 facing the receiving space 130 (e.g.) Figures 3-4 The upper side of the accommodating tank 121 shown is open, so that the side of the heat exchange tube 31 facing the accommodating space 130 (such as...) Figures 3-4 The upper side of the heat exchange tube 31 shown can directly contact the battery cell 200, enabling cooling or heating of the battery cell 200 and ensuring heat exchange efficiency to a certain extent. Furthermore, the side of the heat exchange tube 31 facing away from the accommodating space 130 (such as...) Figures 3-4The lower side of the heat exchange tube 31 shown can be covered by the base plate 10, which can ensure the heat preservation performance to a certain extent. This can solve the problems of heat preservation and heat exchange at the same time, which is beneficial to improving the driving range of the battery device 1000 when it works in a cold environment.

[0072] The heat exchange tube 31 is located in the receiving groove 121 of the base plate 10. Compared with the technical solution of using a cold plate for heat exchange, the heat exchange tube 31 has a lower cost than the cold tube, and the heat exchange tube 31 is directly located in the receiving groove 121. This simplifies the installation process of the heat exchange tube 31, reduces the number of parts required for the installation of the heat exchange tube 31, thereby reducing the cost of the battery device 1000 and lightening its weight.

[0073] The base plate 10 can be integrally stamped to form the receiving groove 121, which can ensure the structural strength of the base plate 10 and facilitate processing. The base plate 10 is used to protect the heat exchange tube 31 and the battery cell 200.

[0074] The heat exchange tube 31 can be installed into the receiving groove 121 of the base plate 10 by means of plug-in or adhesive bonding, which is convenient for disassembly and maintenance. The heat exchange tube 31 can also be integrally formed or welded to the base plate 10, which is convenient for processing. This allows the heat exchange tube 31 and the base plate 10 to be connected as a whole, and the heat exchange tube 31 is not easy to detach from the base plate 10, resulting in good heat exchange effect for the battery cell 200.

[0075] The protective plate 15 is located on the side of the base plate 10 away from the heat exchange tube 31 (e.g., Figure 3 The base plate 10 (located on the lower side of the base plate 10) is situated between the heat exchange tube 31 and the protective plate 15, facilitating the placement of the protective plate 15 on the outermost side of the battery device 1000. The protective plate 15 protects the battery device 1000 from impacts by external objects. When the battery device 1000 is impacted, the protective plate 15 acts as the outermost layer, deforming to absorb the impact first. This deformation allows the protective plate 15 to absorb energy (such as the kinetic energy of the impacting object), attenuating the impact energy transmitted to the base plate 10 and protecting it, thereby protecting the heat exchange tube 31 and the battery cell 200, and improving their protective performance. For example, it reduces the risk of the heat exchange tube 31 breaking and leaking coolant due to energy impact, and reduces the risk of damage to the battery cell 200 due to energy impact, thus enhancing the safety of the battery device 1000.

[0076] The protective plate 15 can be fixedly connected to the base plate 10 by one or more methods such as plugging, bonding, and welding, so that the protective plate 15 and the base plate 10 can be fixedly connected as a whole, and the protective plate 15 and the base plate 10 are not easy to separate, which helps to improve the strength and rigidity of the whole.

[0077] The heat exchange tube 31, the base plate 10, and the protective plate 15 can each be integrally formed. The heat exchange tube 31 and the base plate 10 can be fixedly connected as one integral part, and the protective plate 15 and the base plate 10 can be fixedly connected as one integral part. The base plate 10 is located between the heat exchange tube 31 and the protective plate 15. Therefore, the heat exchange tube 31, the base plate 10, and the protective plate 15 can be fixedly connected as a sandwich structure, which helps to improve the strength and rigidity of the sandwich structure, thereby improving the strength and rigidity of the battery box 1000 to protect the battery cell 200. The sandwich structure can also be directly used in the battery housing 1000 to connect the sandwich structure directly to other components of the battery housing 1000, such as the outer frame 20, without having to connect the heat exchange tube 31, the base plate 10, and the protective plate 15 to other components of the battery housing 1000 separately. This facilitates the integrated supply of the heat exchange tube 31, the base plate 10, and the protective plate 15, reduces installation steps, simplifies the installation process, and reduces the number of parts required for installation, thereby reducing the cost and weight of the battery device 1000.

[0078] For ease of description, the integral part formed by the fixed connection of heat exchange tube 31, base plate 10 and protective plate 15 will be referred to as sandwich structure.

[0079] The battery housing 1000 typically includes a first part 110 and a second part 120. The second part 120 is positioned above the first part 110. The housing space 130 of the battery housing 1000 is located between the bottom structure of the first part 110 and the top structure of the second part 120 and is enclosed by an outer frame 20. The sandwich structure can be the bottom structure of the first part 110, in which case the heat exchange pipe 31 is positioned on the upper side of the sandwich structure. Alternatively, the sandwich structure can be the top part of the second part 120, in which case the heat exchange pipe 31 is positioned on the lower side of the sandwich structure. Positioning the sandwich structure at the top or bottom of the battery housing 1000 can enhance the strength and rigidity of the battery housing 1000, thereby protecting the individual battery cells 200 within the battery housing 1000.

[0080] In the technical solution of this application embodiment, heat exchange tube 31 with lower cost is used for heat exchange, which can reduce the cost of battery device 1000. After the heat exchange tube 31, base plate 10 and protective plate 15 are fixedly connected into a sandwich structure, it can be directly used in battery box 1000. This can achieve integrated supply, reduce installation steps, simplify installation process, and reduce the number of parts required for installation. In this way, the cost of battery device 1000 can be reduced, the weight of battery device 1000 can be reduced, and the strength and rigidity of battery box 1000 can be improved.

[0081] In some embodiments, such as Figures 3-6As shown, the heat exchange device 30 includes a heat exchange tube 31 and a heat exchange joint 32. At least a portion of the heat exchange joint 32 is disposed within the accommodating space 130. The heat exchange joint 32 connects the two ends of the heat exchange tube 31 and defines an inlet chamber and an outlet chamber that communicate with the flow channel 312 of the heat exchange tube 31, so as to continuously introduce heat exchange medium into the heat exchange tube 31.

[0082] In some embodiments, such as Figures 5-6 As shown, the heat exchange tube 31 is provided with multiple partitions 3121. The dimensions of the partitions 3121 can be the same or different, thereby dividing the tube into sub-channels 3122 of equal or multiple sizes. The sub-channels 3122 can be interconnected at their ends or connected to the inlet and outlet chambers respectively; that is, the connection form of the sub-channels 3122 is not limited. By providing multiple partitions 3121 in the heat exchange tube 31, the structural strength of the heat exchange tube 31 can be increased, extending its service life. On the other hand, the contact area between the heat exchange medium and the tube wall can be increased, thereby improving the heat transfer efficiency. Furthermore, each sub-channel 3122 can function as an independent heat exchange unit, which helps to distribute heat more evenly.

[0083] like Figures 3-5 As shown, in some embodiments of this application, the base plate 10 is provided with a limiting protrusion 122, which helps to improve the strength and rigidity of the base plate 10. The heat exchange tube 31 includes multiple tube segments 311, which are connected sequentially. The extension directions of different tube segments 311 can be the same or different. For example, two adjacent tube segments 311 can be arranged vertically in the horizontal plane, or two adjacent tube segments 311 can be arranged at a certain angle. Multiple tube segments 311 can form a square structure, a U-shaped structure, a Z-shaped structure, etc.

[0084] A clearance space is formed between adjacent pipe segments 311, and at least a portion of the limiting protrusion 122 is located in the clearance space. The limiting protrusion 122 can limit the adjacent pipe segments 311, thereby reducing the possibility of damage to the heat exchange tube 31 caused by collision between adjacent pipe segments 311, which helps protect the heat exchange tube 31. The limiting protrusion 122 also ensures that multiple pipe segments 311 are always in contact with more battery cells 200, reducing the possibility of adjacent pipe segments 311 being squeezed together and some battery cells 200 not being in contact with the heat exchange tube 31, which helps improve the heat exchange effect.

[0085] Therefore, by setting multiple pipe sections 311 and limiting protrusions 122, the limiting protrusions 122 limit the multiple pipe sections 311, thereby increasing the length of the heat exchange tube 31, increasing the contact area and contact stability between the heat exchange tube 31 and the battery cell 200, and improving the heat exchange effect. On the other hand, it increases the contact area between the heat exchange tube 31 and the base plate 10, increases the reliability of the connection between the heat exchange tube 31 and the base plate 10, and improves the stability of the entire battery device 1000.

[0086] like Figures 3-6 As shown, in some embodiments of this application, the base plate 10 includes a first support section 11 and a second support section 12. The second support section 12 defines a receiving groove 121, which is used to support the heat exchange tube 31 and the battery cell 200. The first support section 11 is located on the outer periphery of the second support section 12, and can be connected to the outer frame 20 of the battery housing 1000, facilitating the installation of the sandwich structure onto the outer frame 20.

[0087] The surface of the heat exchange tube 31 facing away from the protective plate 15 does not exceed the surface of the first support section 11 facing away from the protective plate 15, for example... Figures 3-6 As shown, the upper surface of the heat exchange tube 31 does not exceed the upper surface of the first support section 11. Making the thickness of the heat exchange tube 31 less than or approximately the same as the depth of the receiving groove 121 allows the heat exchange tube 31 to be closer to or even in direct contact with the battery cell 200, improving the heat exchange effect on the battery cell 200. It also prevents the heat exchange tube 31 from protruding beyond the outer surface of the first support section 11. This reduces the space occupied by the battery device 1000, ensuring the energy density of the battery device 1000. Furthermore, it allows the battery cell 200 to be supported by the heat exchange tube 31, the limiting protrusion 122, and the first support section 11, especially the first support section 11, reducing the pressure exerted by the battery cell 200 on the heat exchange tube 31 and protecting the heat exchange tube 31.

[0088] Therefore, by placing the heat exchange tube 31 on the second support section 12 and ensuring that the heat exchange tube 31 does not protrude from the outer surface of the first support section 11, the heat exchange effect on the battery cell 200 can be improved, the pressure on the heat exchange tube 31 can be reduced to protect the heat exchange tube 31, and the occupancy of the internal space of the battery device 1000 can be reduced to ensure the energy density of the battery device 1000.

[0089] like Figures 3-5 As shown, in some embodiments of this application, a portion of the second support section 12 arches toward the side away from the protective plate 15 to form a limiting protrusion 122, while the non-arched portion of the second support section 12 can form a receiving groove 121, so that the second support section 12 defines the receiving groove 121 and the limiting protrusion 122. The limiting protrusion 122 and the groove wall of the receiving groove 121 are integral and not easily separated.

[0090] Therefore, after the heat exchange tube 31 is placed in the receiving groove 121, the heat exchange tube 31 is limited by the limiting protrusion 122. The limiting protrusion 122 is not easy to move relative to the receiving groove 121, so that the limiting protrusion 122 can effectively restrict the heat exchange tube 31 in the receiving groove 121, and the limiting effect of the heat exchange tube 31 is better.

[0091] In some embodiments of this application, the receiving groove 121 is filled with an adhesive, and the surface of the adhesive facing away from the protective plate 15 is flush with the surface of the first support section 11 facing away from the protective plate 15. The adhesive may be a structural adhesive.

[0092] The heat exchange tube 31 is placed inside the receiving groove 121. Therefore, the colloid can be filled in the portion of the receiving groove 121 without the heat exchange tube 31, or in the portion of the receiving groove 121 with the heat exchange tube 31. For example, in an embodiment where the heat exchange tube 31 is flush with the first support section 11, the colloid can be filled between the heat exchange tube 31 and the first support section 11, that is, the colloid is filled around the heat exchange tube 31 in the horizontal direction. In an embodiment where the heat exchange tube 31 is lower than the first support section 11, the colloid can not only be filled between the heat exchange tube 31 and the first support section 11, but also on the side of the heat exchange tube 31 away from the protective plate 15, that is, the colloid is filled on both sides of the heat exchange tube 31 in the vertical direction, so that the heat exchange tube 31 and the colloid, after being combined, are flush with the first support section 11.

[0093] By making the side surface of the colloid away from the protective plate 15 flush with the side surface of the first support section 11 away from the protective plate 15, the side surface of the base plate 10 away from the protective plate 15 can be formed into a plane, so that the battery cell 200 can be supported on the plane, which helps to improve the support effect of the battery cell 200, reduce stress concentration, and protect the heat exchange tube 31.

[0094] For example, in some specific embodiments, such as Figures 3-4 As shown, the limiting protrusion 122 is flush with the first support section 11, and the heat exchange tube 31 is lower than the limiting protrusion 122 and the first support section 11. This prevents the heat exchange tube 31 from protruding from the outer surface of the base plate 10, reducing the space occupied by the battery device 1000 and ensuring the energy density of the battery device 1000. The colloid can be filled in the portion of the receiving groove 121 between the heat exchange tube 31 and the groove wall of the receiving groove 121, and on the upper side of the heat exchange tube 31, so that the colloid, the limiting protrusion, and the upper surface of the first support section 11 form a plane. Alternatively, the colloid can be filled in the portion between the heat exchange tube 31 and the groove wall of the receiving groove 121, on the upper side of the heat exchange tube 31, and on the upper side of the limiting protrusion, so that the colloid, the limiting protrusion, and the first support section 11 form a plane, and this plane is composed of colloid. The surface of this plane is less likely to have large gaps, resulting in better support for the battery cell 200.

[0095] In some embodiments, the surface of the heat exchange tube 31 and the base plate 10 near the receiving space 130 (e.g. Figures 3-4 The upper surface of the heat exchange tube 31 shown is coated with an insulating layer, which can achieve insulation between the heat exchange tube 31 and the battery cell 200, reduce the probability of leakage of the battery device 1000, and ensure the safety of the battery device 1000.

[0096] The insulating layer can be a ceramic-based insulating coating such as alumina, aluminum nitride, or magnesium oxide, which can improve the thermal conductivity of the insulating layer and ensure the heat exchange effect of the heat exchange tube 31 on the battery cell 200. The insulating layer can also be a coating of polymer materials such as epoxy resin or polyurethane, or a silicon-based material such as organosilicon resin, which can improve the service life of the insulating layer, facilitate maintenance, and improve the impact resistance of the insulating layer, thereby improving the protection performance of the battery cell 200.

[0097] like Figures 4-6 As shown, in some embodiments of this application, the protective plate 15 has a direction away from the base plate 10 (e.g., Figures 4-6 (As shown in the top-to-bottom direction) the recessed relief groove 151, the portion of the base plate 10 with the receiving groove 121 corresponds to the position of the relief groove 151 and at least a portion extends into the relief groove 151.

[0098] A portion of the protective plate 15 is recessed to form a relief groove 151, and a portion of the base plate 10 is recessed to form a receiving groove 121. The bottom wall of the receiving groove 121 extends into the relief groove 151, which allows the protective plate 15 to cover the portion of the base plate 10 with the receiving groove 121, thereby improving the protective effect of the protective plate 15 on the base plate 10 and the heat exchange tube 31.

[0099] Therefore, by providing a relief groove 151 on the protective plate 15 corresponding to the position of the receiving groove 121, and by having at least a portion of the receiving groove 121 extend into the relief groove 151, the protective plate 15 can cover the portion of the bottom plate 10 with the receiving groove 121, thereby improving the protective effect of the protective plate 15 on the bottom plate 10 and the heat exchange tube 31.

[0100] In some embodiments, the bottom wall of the receiving groove 121 extends into the avoidance groove 151 and is spaced apart from the bottom wall of the avoidance groove 151, which can provide sufficient deformation space for the protective plate 15, so that the protective plate 15 can deform sufficiently to absorb impact energy when it is impacted by an external object. The protective plate 15 cooperates with the base plate 10 to improve the structural strength of the battery box 1000, so that the battery device 1000 can withstand greater impact energy and improve the protection performance of the battery device 1000.

[0101] The protective plate 15 and the base plate 10 can be connected together by one or more of the following methods: hot pressing, bonding, bolting, welding, etc. For example, in some embodiments of this application, the protective plate 15 and the base plate 10 are connected by hot pressing. This allows the protective plate 15 and the base plate 10 to be formed separately and then fixedly connected together by hot pressing. No other connecting parts are required. This method can connect multiple sets of protective plates 15 and base plates 10 in a short time with a firm connection, resulting in high connection efficiency. This is beneficial for improving the manufacturing efficiency of the sandwich structure and thus improving the manufacturing efficiency of the battery device 1000.

[0102] Therefore, by connecting the protective plate 15 and the base plate 10 through hot pressing, not only can the protective plate 15 and the base plate 10 be firmly connected, but the connection efficiency can also be improved. Moreover, no additional connecting parts are required, resulting in low connection costs. This is beneficial for improving the manufacturing efficiency of the battery device 1000 and reducing the manufacturing cost of the battery device 1000.

[0103] In some embodiments of this application, the protective plate 15 is made of carbon fiber or composite material. High-strength, high-rigidity, and corrosion-resistant carbon fiber or composite materials can be selected to manufacture the protective plate 15. That is, the protective plate 15 is formed of a non-metallic material. This effectively reduces the weight of the battery housing 100, thereby reducing the overall weight of the battery device 1000. Since the energy density of the battery device 1000 is equal to the weight of the battery cell divided by the weight of the battery device 1000, reducing the weight of the battery device 1000 increases its energy density.

[0104] In embodiments where the protective plate 15 is made of carbon fiber, carbon fiber has higher strength, stiffness, and hardness than most metallic materials such as aluminum alloys. Furthermore, carbon fiber itself possesses excellent corrosion resistance. Using carbon fiber to manufacture the protective plate 15 improves the strength, stiffness, hardness, and corrosion resistance of the sandwich structure, making it less prone to deformation or corrosion that could damage the internal battery cells 200, thus enhancing the safety of the battery device 1000. In embodiments where the protective plate 15 is made of composite material, the composite material can be a fiber composite material, where the fibers mainly include carbon fiber, glass fiber, and aramid fiber. For example, the composite material can be a thermoplastic continuous fiber composite material with a thermoplastic resin matrix, including PP (polypropylene), PA (polyamide), PPS (polyphenyl sulfide), etc. As a new type of thermoplastic composite material with high strength, high rigidity, high toughness, and recyclability, thermoplastic continuous fiber composite material offers comparable strength, lighter weight, and higher energy absorption capacity compared to steel and aluminum alloys. Therefore, the protective plate 15 formed from thermoplastic continuous fiber composite material also possesses high strength, high rigidity, and high toughness. For example, composite material parts are thermosetting continuous fiber composite materials with epoxy resin, polyurethane, etc. as the matrix. Since thermosetting continuous fiber composite materials have high strength, high stiffness and dimensional stability, the protective plate 15 formed by thermosetting continuous fiber composite materials also has the characteristics of high strength, high stiffness and dimensional stability.

[0105] Therefore, using carbon fiber or composite materials to make the protective plate 15 can effectively reduce the weight of the battery box 100, thereby reducing the overall weight of the battery device 1000. It also helps to improve the strength, rigidity and corrosion resistance of the protective plate 15, thereby improving the strength, rigidity and corrosion resistance of the sandwich structure to protect the battery cells and make the battery device 1000 safer.

[0106] The base plate 10 can be a metal component or a component made of other materials. For example, in some embodiments of this application, the base plate 10 is a metal component, and a portion of the base plate 10 is bent to form a receiving groove 121. A portion of the base plate 10 is oriented away from the heat exchange tube 31 and the receiving space 130 (e.g., Figures 3-4 (As shown in the top-to-bottom direction) bend to bend on the side of the base plate 10 near the heat exchange tube 31 and the receiving space 130 (e.g.) Figures 3-4 A receiving groove 121 is formed on the upper side of the base plate 10, and the receiving groove 121 is connected to the receiving space 130. That is, the base plate 10 can be integrally stamped to form the receiving groove 121, which can ensure the structural strength of the base plate 10 and facilitate processing. The base plate 10 is a metal part, which can improve the structural strength of the base plate 10. For example, the base plate 10 can be made of aluminum alloy, which helps to reduce costs while ensuring the structural strength of the base plate 10.

[0107] Therefore, using metal parts to make the base plate 10 can ensure the structural strength of the base plate 10, which is conducive to improving the strength of the battery box 1000 to protect the battery cells 200. In addition, the base plate 10 is easy to process, which helps to reduce the manufacturing difficulty of the battery box 1000 and improve the manufacturing efficiency of the battery box 1000.

[0108] In some embodiments of this application, the heat exchange tube 31 is welded to the base plate 10. The welding method can be brazing, spot welding, laser welding, friction stir welding (FSW), etc. Welding fixes the heat exchange tube 31 and the base plate 10 together as a whole, which is a low-cost and more robust connection.

[0109] In some embodiments, the heat exchange tube 31 is made of aluminum alloy, which is inexpensive and has good heat exchange performance. Specifically, the heat exchange tube 31 can be made of 6-series aluminum alloy or 5-series aluminum alloy. Compared with the cold plate using 3-series aluminum alloy, the heat exchange tube 31 in this application has higher strength, which helps to improve the strength of the sandwich structure, thereby improving the strength of the battery box 1000 and enhancing the protection of the battery cells 200.

[0110] In some embodiments, the heat exchange tube 31 and the base plate 10 are both made of aluminum alloy. Heat exchange tube 31 and base plate 10 made of the same material are easier to weld, and the welding efficiency of heat exchange tube 31 and base plate 10 is high.

[0111] like Figure 3As shown, in some embodiments of this application, the battery housing 1000 further includes an outer frame 20, which is disposed on the outer periphery of the base plate 10, so that the outer frame 20 and the base plate 10 define a receiving space 130 for placing the battery cell 200.

[0112] At least one of the base plate 10 and the protective plate 15 is connected to the outer frame 20. Since the heat exchange tube 31, the base plate 10, and the protective plate 15 are fixedly connected as a sandwich structure, even if the outer frame 20 is directly connected to the base plate 10 but not directly connected to the protective plate 15, or the outer frame 20 is directly connected to the protective plate 15 but not directly connected to the base plate 10, the three components can still be fixedly connected together. Only two components need to be directly connected to achieve the fixed connection of the three components, which helps to improve the connection strength of the outer frame 20, the base plate 10, and the protective plate 15, reduce connection steps, and simplify the installation process.

[0113] Of course, directly connecting the outer frame 20, the base plate 10, and the protective plate 15 in pairs makes the connection between them more secure. Furthermore, since the heat exchange tube 31, the base plate 10, and the protective plate 15 are fixedly connected as a sandwich structure, only the sandwich structure and the outer frame 20 need to be connected to achieve a direct connection between the outer frame 20, the base plate 10, and the protective plate 15, improving connection strength and simplifying the installation process.

[0114] The protective plate 15 is located on the side of the base plate 10 opposite to the heat exchange tube 31, so that the protective plate 15 is located on the outside of the outer frame 20. Figure 3 As shown, the protective plate 15 can be installed on the outside of the outer frame 20 (e.g., Figure 3 (As shown on the lower side), which facilitates the connection between the protective plate 15 as the outermost layer of the battery device 1000 and the outer frame 20, so that the protective plate 15 can be the first to receive the impact and absorb the impact energy, thereby reducing the degree of deformation of the base plate 10 when the battery device 1000 is impacted, and improving the protective performance of the battery device 1000.

[0115] Therefore, at least one of the base plate 10 and the protective plate 15 is connected to the outer frame 20. Whether the outer frame 20 is directly connected to the base plate 10, directly connected to the protective plate 15, or directly connected to both the base plate 10 and the protective plate 15, the connection between the outer frame 20, the base plate 10, and the protective plate 15 can be strengthened, and the installation process can be simplified. At the same time, the protective plate 15, as the outermost layer of the battery device 1000, can absorb the impact energy first, which can reduce the deformation of the base plate 10 when the battery device 1000 is impacted, and improve the protective performance of the battery device 1000.

[0116] like Figure 3-5As shown, in some embodiments of this application, at least one of the base plate 10 and the protective plate 15 is connected to the outer frame 20 by fasteners, which can ensure the connection effect between the outer frame 20, the base plate 10 and the protective plate 15, and the connection is convenient. The fasteners can be rivet nuts, screws, etc., which have a good fastening effect.

[0117] In particular, in some embodiments, at least one of the base plate 10 and the protective plate 15 is fastened to the outer frame 20 by rivet nuts, or at least one of the base plate 10 and the protective plate 15 is connected to the outer frame 20 by hot-melt self-tapping screw technology (also known as FDS), which enables unilateral operation, reduces the required operating space, and makes the connection more convenient.

[0118] The base plate 10 and the protective plate 15 have the same dimensions in their own extending direction; or, the projection of the protective plate 15 onto the surface where the base plate 10 is located is inside the base plate 10, that is, the base plate 10 covers the entire protective plate 15; or, the projection of the base plate 10 onto the surface where the protective plate 15 is located is inside the protective plate 15, that is, the protective plate 15 covers the entire base plate 10 to achieve protection for the entire base plate 10. In both cases, at least one of the base plate 10 and the protective plate 15 can be connected to the outer frame 20 by fasteners, which is practical.

[0119] Therefore, at least one of the base plate 10 and the protective plate 15 is connected to the outer frame 20 by fasteners, which can ensure the connection effect between the outer frame 20, the base plate 10 and the protective plate 15, and the connection is convenient and practical.

[0120] like Figure 7 As shown, in some embodiments of this application, the projection of the protective plate 15 onto the surface of the base plate 10 is located within the base plate 10, and the base plate 10 is welded to the outer frame 20. Making the size of the protective plate 15 smaller than the size of the base plate 10 allows for a separate welding space to be reserved for filling solder, etc., facilitating the welding of the base plate 10 and the outer frame 20. For example... Figure 7 As shown, the size of the protective plate 15 on the horizontal plane is smaller than that of the base plate 10. The welding space can be L, where 10mm ≤ L ≤ 20mm. If L is too small, the weld will be weak; if L is too large, it will waste space and result in the protective plate 15 being too small, leading to poor protective effect. Therefore, 10mm ≤ L ≤ 20mm balances the weld strength and the size requirements of the protective plate 15. Welding methods can include spot welding, laser welding, friction stir welding, etc.

[0121] Therefore, by making the projection of the protective plate 15 on the surface of the base plate 10 lie within the base plate 10, welding space can be provided for welding the base plate 10 and the outer frame 20, so that the base plate 10 and the outer frame 20 are welded firmly, which helps to improve the strength of the battery box 1000.

[0122] In some embodiments, both the base plate 10 and the outer frame 20 are made of aluminum alloy. The base plate 10 and the outer frame 20 of the same material are easier to weld and the connection between the base plate 10 and the outer frame 20 is more efficient.

[0123] Secondly, this application provides an electrical device 2000, which includes the battery device 1000 in the above embodiments, the battery device 1000 being used to provide electrical energy. Therefore, by employing the battery device 1000, the cost and weight of the electrical device 2000 can be reduced.

[0124] 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 (1000), characterized in that, include: A battery housing (100), the battery housing (100) comprising: A base plate (10) defines a receiving groove (121); Heat exchange tube (31), the heat exchange tube (31) is disposed in the receiving tank (121); A protective plate (15) is provided on the side of the base plate (10) away from the heat exchange tube (31), and the protective plate (15) is fixedly connected to the base plate (10).

2. The battery device (1000) according to claim 1, characterized in that, The base plate (10) is provided with a limiting protrusion (122), and the heat exchange tube (31) includes multiple tube segments (311), which are connected in sequence. A clearance space is formed between adjacent multiple tube segments (311), and at least a portion of the limiting protrusion (122) is located in the clearance space.

3. The battery device (1000) according to claim 2, characterized in that, The base plate (10) includes a first support section (11) and a second support section (12), the second support section (12) defining the receiving groove (121), the first support section (11) being disposed on the outer periphery of the second support section (12), and the side surface of the heat exchange tube (31) facing away from the protective plate (15) not exceeding the side surface of the first support section (11) facing away from the protective plate (15).

4. The battery device (1000) according to claim 3, characterized in that, A portion of the second support section (12) arches toward the side opposite to the protective plate (15) to form the limiting protrusion (122).

5. The battery device (1000) according to claim 3, characterized in that, The receiving groove (121) is filled with colloid, and the side surface of the colloid opposite to the protective plate (15) is flush with the side surface of the first support section (11) opposite to the protective plate (15).

6. The battery device (1000) according to claim 1, characterized in that, The protective plate (15) has a relief groove (151) recessed in the direction away from the base plate (10), and the portion of the base plate (10) with the receiving groove (121) corresponds to the position of the relief groove (151) and at least a portion extends into the relief groove (151).

7. The battery device (1000) according to claim 1, characterized in that, The protective plate (15) and the base plate (10) are connected by a hot pressing process.

8. The battery device (1000) according to claim 1, characterized in that, The protective plate (15) is a carbon fiber material component or a composite material component.

9. The battery device (1000) according to claim 1, characterized in that, The base plate (10) is a metal part, and a portion of the base plate (10) is bent to form the receiving groove (121).

10. The battery device (1000) according to claim 1, characterized in that, The heat exchange tube (31) is welded to the base plate (10).

11. The battery device (1000) according to any one of claims 1-10, characterized by, The battery box (100) further includes an outer frame (20), which is disposed on the outer periphery of the base plate (10) and is connected to the base plate (10) and / or the protective plate (15).

12. The battery device (1000) according to claim 11, characterized in that The base plate and / or the protective plate (15) are connected to the outer frame (20) by fasteners.

13. The battery device (1000) according to claim 11, characterized in that, The projection of the protective plate (15) on the surface of the base plate (10) is located within the base plate (10), and the base plate (10) is welded to the outer frame (20).

14. An electrical device (4000) comprising: It includes a battery device (1000) according to any one of claims 1-13, the battery device (1000) being used to provide electrical energy.

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