High-voltage box, battery device and electric equipment

Abstract

The utility model discloses a high-voltage box, a battery device and electric equipment, and relates to the technical field of batteries. Wherein the high-voltage box comprises a box body and an electric connection assembly, and a liquid cooling flow channel is arranged in the box body; the electric connection assembly is arranged in the box body; the liquid cooling flow channel is configured to dissipate heat of the electric connection assembly, and the extending direction of the liquid cooling flow channel is consistent with the extending direction of the electric connection assembly; a concave-convex structure is arranged on the outer surface of the box body. According to the technical scheme, the heat dissipation efficiency of the high-voltage box can be improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a high-voltage box, battery device and electrical equipment. Background Technology

[0002] High-voltage boxes are core components in new energy electric vehicles and energy storage systems, and are mainly used for the distribution, management and safety protection of high-voltage electrical energy.

[0003] However, the high-voltage box requires a large amount of electrical energy during use, and its internal components are prone to overheating, resulting in poor heat dissipation efficiency. Utility Model Content

[0004] The main purpose of this invention is to propose a high-voltage box that aims to improve the heat dissipation efficiency of the high-voltage box.

[0005] To achieve the above objectives, the high-voltage box proposed in this utility model includes:

[0006] The housing, wherein a liquid cooling channel is provided inside the housing; and

[0007] An electrical connection component is disposed within the housing; the liquid cooling channel is configured to dissipate heat from the electrical connection component, and the extension direction of the liquid cooling channel is consistent with the extension direction of the electrical connection component; the outer surface of the housing is provided with a concave-convex structure.

[0008] In the high-voltage box of this application, a liquid cooling channel is set inside the box to dissipate heat and cool the electrical connection components using the cooling liquid in the liquid cooling channel. At the same time, the liquid cooling channel is extended along the extension direction of the electrical connection components, which can prolong the heat exchange path between the liquid cooling channel and the electrical connection components and increase the heat exchange area between the liquid cooling channel and the electrical connection components. Meanwhile, the concave and convex structure on the outer surface of the box can increase the heat dissipation area of ​​the box, thereby effectively improving the heat dissipation efficiency of the high-voltage box.

[0009] In one embodiment of this application, the housing includes a first housing and a second housing connected to each other, and the electrical connection component is disposed between the first housing and the second housing; at least one of the first housing and the second housing is provided with the liquid cooling channel.

[0010] This design makes it easier to install electrical connection components.

[0011] In one embodiment of this application, the first housing is provided with a first liquid cooling channel, and the second housing is provided with a second liquid cooling channel; the first liquid cooling channel and the second liquid cooling channel are respectively disposed on opposite sides of the electrical connection assembly.

[0012] This design allows for liquid-cooled flow channels on both sides of the electrical connection components for heat exchange, thereby further increasing the heat exchange area and improving heat dissipation efficiency.

[0013] In one embodiment of this application, the first liquid cooling channel and the second liquid cooling channel are independent of each other.

[0014] This design ensures that the coolant in the first liquid cooling channel and the second liquid cooling channel will not affect each other, thus maintaining the temperature difference between the coolant and the electrical connection components, improving the heat exchange efficiency between the electrical connection components and the coolant, and further accelerating the heat dissipation of the high-voltage box.

[0015] In one embodiment of this application, the first liquid cooling channel is provided with a first liquid inlet and a first liquid outlet, the first liquid inlet and the first liquid outlet being respectively located at both ends of the extension direction of the electrical connection component; the second liquid cooling channel is provided with a second liquid inlet and a second liquid outlet, the second liquid inlet and the second liquid outlet being respectively located at both ends of the extension direction of the electrical connection component.

[0016] The first liquid inlet and the second liquid inlet are located on the same side, and the first liquid outlet and the second liquid outlet are located on the same side.

[0017] This design can further improve the heat dissipation efficiency of the high-voltage box.

[0018] In one embodiment of this application, the liquid cooling channel is formed in the wall interlayer of the housing.

[0019] This design ensures the integrity of the box's appearance while avoiding taking up installation space for electrical connection components.

[0020] In one embodiment of this application, a mounting groove is provided between the first box and the second box, and the electrical connection component is disposed in the mounting groove.

[0021] This design effectively utilizes the internal space of the box, reduces the overall volume of the high-voltage box, thereby reducing the space occupied by the battery device and increasing the battery energy density.

[0022] In one embodiment of this application, the mounting groove is formed in the first housing, and the mounting groove is configured as a contoured groove that conforms to the shape of the electrical connection assembly.

[0023] This design can improve the assembly reliability of electrical connection components.

[0024] In one embodiment of this application, the electrical connection assembly includes a relay, a current sensor, and a plurality of electrical connectors. The relay and the current sensor are connected through one of the electrical connectors. The end of the relay opposite to the current sensor is connected to one of the electrical connectors, and the end of the current sensor opposite to the relay is connected to one of the electrical connectors.

[0025] The mounting slot has a first slot, a second slot, and a plurality of connecting slots. The relay is located in the first slot, the current sensor is located in the second slot, and a plurality of electrical connectors are correspondingly located in the plurality of connecting slots.

[0026] This design can further improve the installation stability of electrical connection components.

[0027] To achieve the above objectives, this application also provides a battery device, including a battery cell and the aforementioned high-voltage box, wherein the electrical connection assembly of the high-voltage box is electrically connected to the battery cell.

[0028] This design effectively dissipates heat and avoids the risk of overheating.

[0029] To achieve the above objectives, this application also provides an electrical device including the aforementioned battery device.

[0030] 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 other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 This is a cross-sectional view of an embodiment of the high-voltage box of this application;

[0033] Figure 2 This is an exploded view of an embodiment of the high-voltage box of this application;

[0034] Figure 3 This is a schematic diagram of the external structure of the second box in an embodiment of this application;

[0035] Figure 4 This is a perspective view of the second box body in an embodiment of this application;

[0036] Figure 5 This is a schematic diagram of the external structure of the first box in the embodiments of this application;

[0037] Figure 6 This is a perspective view of the first box body in an embodiment of this application;

[0038] Figure 7 This is a schematic diagram of the structure of the electrical connection component in an embodiment of this application.

[0039] Explanation of icon numbers:

[0040]

[0041] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0044] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0045] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0046] The application of power batteries is becoming increasingly widespread. Power 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 aerospace and other fields. With the continuous expansion of the application areas of power batteries, the market demand is also constantly increasing.

[0047] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0048] There can be multiple battery cells, which can be connected in series, in parallel, or in a mixed manner. A mixed connection means that multiple battery cells are connected in both series and parallel.

[0049] Each battery cell can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell can be cylindrical, flat, cuboid, or other shapes.

[0050] The high-voltage box involved in this application is a core component of electric vehicles and energy storage systems, mainly used for the distribution, management, and safety protection of high-voltage electrical energy. The high-voltage box is connected to individual battery cells and contains structures such as relays, fuses, copper plates, and current sensors. During use, it needs to manage a large amount of electrical energy, and its internal electrical components are prone to overheating, resulting in poor heat dissipation efficiency.

[0051] Therefore, this application proposes a high-voltage box, which utilizes a liquid-cooled flow channel within the box to dissipate heat and cool the electrical connection components, achieving a better heat dissipation effect. The structure of this high-voltage box will be described below by way of an embodiment.

[0052] like Figure 1 and Figure 2 As shown, the high-voltage box 100 includes a box body 1 and an electrical connection assembly 2. The box body 1 is provided with a liquid cooling channel, and the electrical connection assembly 2 is disposed inside the box body 1. The liquid cooling channel is configured to dissipate heat from the electrical connection assembly 2, and the extension direction of the liquid cooling channel is consistent with the extension direction of the electrical connection assembly 2. The outer surface of the box body 1 is provided with a concave-convex structure 13.

[0053] The housing 1 serves a supporting and protective function, and its interior contains a mounting slot 103 for installing the power supply connection component 2. In practical applications, the housing 1 can be made of non-metallic insulating materials. The shape of the housing 1 can be determined according to the actual situation, such as being rectangular, circular, square, or some irregularly shaped structures.

[0054] The housing 1 contains a liquid cooling channel, which can be located on the inner side, outer side, or interlayer of the housing 1 wall. The cross-sectional shape of the liquid cooling channel can be circular, triangular, trapezoidal, rectangular, or other irregular shapes. In practical applications, the liquid cooling channel has an inlet and an outlet, which can be connected to the inlet and outlet of an external liquid cooling device, respectively, forming a liquid cooling circulation loop. This allows the liquid flow to carry away the heat from the electrical connection component 2, achieving better heat dissipation. Optionally, the liquid in the liquid cooling channel can be water or other coolant.

[0055] The electrical connection component 2 can be understood as any electrical component within the high-voltage box 100, such as a relay 21, a current sensor 22, or an electrical connector 23, such as a copper bar. During operation, the electrical connection component 2 generates significant heat. The heat generated by the electrical connection component 2 is dissipated and cooled by the flow of liquid in the liquid cooling channel. The liquid cooling channel can be located adjacent to the electrical connection component 2, for example, it can be located on one side of the electrical connection component 2, or it can be located on the periphery of the electrical connection component 2.

[0056] The extension direction of the liquid cooling channel is consistent with the extension direction of the electrical connection component 2. Understandably, when the electrical connection component 2 extends in one direction, the liquid cooling channel also extends in the same direction. The liquid cooling channel can extend from one end of the electrical connection component 2 to the other end, or from one end to the middle of the electrical connection component 2, or from the middle of the electrical connection component 2 to the other end or other locations, etc. When the electrical connection component 2 extends in an irregular direction, the liquid cooling channel also extends along that irregular extension direction. By setting the extension direction of the liquid cooling channel to be consistent with the extension direction of the electrical connection component 2, the heat exchange path between the liquid cooling channel and the electrical connection component 2 can be lengthened, the heat exchange area between the liquid cooling channel and the electrical connection component 2 can be increased, thereby improving heat dissipation efficiency.

[0057] The concave-convex structure 13 is relative to the planar structure, and its specific concave-convex shape is not limited here. For example, it can be wavy, sawtooth, wedge-shaped, dotted, or some other shape. Compared with a planar structure, this design can increase the heat dissipation area of ​​the box 1 and effectively improve the heat dissipation efficiency.

[0058] In summary, in the high-voltage box 100 of this application, by setting a liquid cooling channel inside the box body 1, the cooling liquid in the liquid cooling channel is used to dissipate heat and cool down the electrical connection component 2. At the same time, by extending the liquid cooling channel along the extension direction of the electrical connection component 2, the heat exchange path between the liquid cooling channel and the electrical connection component 2 can be extended, and the heat exchange area between the liquid cooling channel and the electrical connection component 2 can be increased. The concave and convex structure 13 on the outer surface of the box body 1 can increase the heat dissipation area of ​​the box body 1, thereby effectively improving the heat dissipation efficiency of the high-voltage box 100.

[0059] Please see Figure 1 and Figure 2 In one embodiment of this application, the housing 1 includes a first housing 11 and a second housing 12 connected to each other, and an electrical connection component 2 is disposed between the first housing 11 and the second housing 12; at least one of the first housing 11 and the second housing 12 is provided with a liquid cooling channel.

[0060] In this embodiment, the first housing 11 and the second housing 12 can be equivalent to a shell and a cover, or two half-shell structures. The electrical connection component 2 is disposed between the first housing 11 and the second housing 12. It can be sandwiched between the first housing 11 and the second housing 12, or it can be embedded within either housing 1. This design facilitates the installation of the electrical connection component 2 compared to using a separate housing 1 structure.

[0061] At least one of the first box 11 and the second box 12 is provided with a liquid cooling channel. It can be understood that only the first box 11 is provided with a liquid cooling channel, or only the second box 12 is provided with a liquid cooling channel, or both the first box 11 and the second box 12 are provided with liquid cooling channels.

[0062] Please see Figure 1 , Figure 4 as well as Figure 6 In one embodiment of this application, a first liquid cooling channel 101 is provided in the first housing 11, and a second liquid cooling channel 102 is provided in the second housing 12; the first liquid cooling channel 101 and the second liquid cooling channel 102 are respectively disposed on opposite sides of the electrical connection assembly 2.

[0063] This design allows liquid-cooled channels on both sides of the electrical connection component 2 for heat exchange, thereby further increasing the heat exchange area and improving heat dissipation efficiency.

[0064] Please see Figure 1 , Figure 4 as well as Figure 6 In one embodiment of this application, the first liquid cooling channel 101 and the second liquid cooling channel 102 are independent of each other.

[0065] Understandably, the first liquid cooling channel 101 and the second liquid cooling channel 102 are independent channels and are not connected to each other, so they can cool the opposite sides of the electrical connection component 2 respectively.

[0066] This design ensures that the coolant in the first liquid cooling channel 101 and the second liquid cooling channel 102 will not affect each other, thus guaranteeing the temperature difference between the coolant and the electrical connection component 2, improving the heat exchange efficiency between the electrical connection component 2 and the coolant, and further accelerating the heat dissipation of the high-pressure box 100.

[0067] Please see Figure 1 In one embodiment of this application, the first liquid cooling channel 101 is provided with a first liquid inlet 101a and a first liquid outlet 101b, which are respectively located at both ends of the extension direction of the electrical connection component 2; the second liquid cooling channel 102 is provided with a second liquid inlet 102a and a second liquid outlet 102b, which are respectively located at both ends of the extension direction of the electrical connection component 2; wherein, the first liquid inlet 101a and the second liquid inlet 102a are located on the same side, and the first liquid outlet 101b and the second liquid outlet 102b are located on the same side.

[0068] Understandably, the first liquid inlet 101a can be an opening structure on the first housing 11, or it can be a pipe opening structure of a connecting pipe provided on the first housing 11. The first liquid outlet 101b can be an opening structure on the first housing 11, or it can be a pipe opening structure of a connecting pipe provided on the first housing 11. The first liquid inlet 101a and the first liquid outlet 101b are respectively located at both ends of the extension direction of the electrical connection assembly 2, which can extend the length of the first liquid cooling channel 101, extend the heat exchange length between the first liquid cooling channel 101 and the electrical connection assembly 2, increase the heat exchange area, and improve the heat dissipation efficiency.

[0069] The second liquid inlet 102a can be an opening structure on the second housing 12, or it can be a pipe opening structure of a connecting pipe provided on the second housing 12. The second liquid outlet 102b can be an opening structure on the second housing 12, or it can be a pipe opening structure of a connecting pipe provided on the second housing 12. The second liquid inlet 102a and the second liquid outlet 102b are respectively located at both ends of the extension direction of the electrical connection assembly 2, which can extend the length of the second liquid cooling channel 102, extend the heat exchange length between the second liquid cooling channel 102 and the electrical connection assembly 2, increase the heat exchange area, and improve the heat dissipation efficiency.

[0070] The first liquid inlet 101a and the second liquid inlet 102a are located on the same side, and the first liquid outlet 101b and the second liquid outlet 102b are located on the same side, so that the flow direction of the coolant in the first liquid cooling channel 101 is approximately the same as the flow direction of the coolant in the second liquid cooling channel 102, thereby avoiding the situation of mutual heat exchange between the coolants in the two liquid cooling channels.

[0071] This design can further improve the heat dissipation efficiency of the high-voltage box 100.

[0072] Please see Figure 1 , Figure 4 as well as Figure 6 In one embodiment of this application, the liquid cooling channel is formed in the wall interlayer of the housing 1.

[0073] Understandably, the liquid cooling channel is located between the outer and inner walls of the housing 1.

[0074] This design ensures the integrity of the box 1's appearance while avoiding occupying the installation space of the electrical connection components 2.

[0075] Please see Figure 2 and Figure 5 In one embodiment of this application, a mounting groove 103 is provided between the first box 11 and the second box 12, and the electrical connection component 2 is disposed in the mounting groove 103.

[0076] Understandably, the mounting groove 103 can be formed separately on the first box 11, or it can be formed separately on the second box 12, or it can be formed by slots being cut and connected on the first box 11 and the second box 12 respectively.

[0077] By placing the electrical connection component 2 inside the mounting slot 103, the internal space of the box 1 can be effectively utilized, reducing the overall volume of the high voltage box 100, thereby reducing the space occupied inside the battery device and increasing the battery energy density.

[0078] Please see Figure 2 and Figure 5 In one embodiment of this application, a mounting groove 103 is formed in the first housing 11, and the mounting groove 103 is configured as a contoured groove that conforms to the shape of the electrical connection assembly 2.

[0079] In this embodiment, the mounting groove 103 is a contour groove for the electrical connection component 2. When the electrical connection component 2 is installed in the mounting groove 103, each groove wall of the mounting groove 103 can limit the electrical connection component 2, thereby improving the assembly reliability of the electrical connection component 2.

[0080] Please see Figure 2 , Figure 5 as well as Figure 7In one embodiment of this application, the electrical connection assembly 2 includes a relay 21, a current sensor 22, and a plurality of electrical connectors 23. The relay 21 and the current sensor 22 are connected by an electrical connector 23. One end of the relay 21 away from the current sensor 22 is connected to an electrical connector 23, and one end of the current sensor 22 away from the relay 21 is connected to an electrical connector 23. The mounting groove 103 has a first groove 1031, a second groove 1032, and a plurality of connecting grooves 1033. The relay 21 is disposed in the first groove 1031, the current sensor 22 is disposed in the second groove 1032, and the plurality of electrical connectors 23 are correspondingly disposed in the plurality of connecting grooves 1033.

[0081] Among them, relay 21 can provide overload protection, short circuit protection, leakage protection and other measures for the equipment, further improving the safety and reliability of the equipment.

[0082] The current sensor 22 is a structure used to detect and measure current in high-voltage circuits. Its core function is to convert current signals under high-voltage conditions into processable electrical signals (such as DC voltage or current), while simultaneously achieving electrical isolation to ensure measurement safety.

[0083] Electrical connector 23 is a component used in high-voltage circuits to achieve electrical connection, signal transmission, and safety protection. Optionally, electrical connector 23 can be made of copper wire, aluminum wire, etc.

[0084] In this embodiment, by configuring the mounting slot 103 to have a first slot 1031, a second slot 1032 and a plurality of connecting slots 1033, the first slot 1031 is used to accommodate the relay 21, the second slot 1032 is used to accommodate the current sensor 22, and the connecting slots 1033 are used to accommodate the electrical connector 23, so that components of different shapes have slot structures corresponding to their shapes for installation, thereby further improving the installation stability of the electrical connection assembly 2.

[0085] This utility model also proposes a battery device, which includes a battery cell and a high-voltage box 100. The specific structure of the high-voltage box 100 is as described in the above embodiments. Since this battery device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. Among them, the electrical connection component 2 of the high-voltage box 100 is electrically connected to the battery cell.

[0086] This utility model also proposes an electrical device, which includes a battery device. The specific structure of the battery device is as described in the above embodiments. Since this electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0087] Alternatively, the electrical equipment may be an electric vehicle, aerospace equipment, or some other type of equipment.

[0088] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A high-voltage box, characterized in that, include: The housing contains liquid cooling channels; and An electrical connection component is disposed within the housing; the liquid cooling channel is configured to dissipate heat from the electrical connection component, and the extension direction of the liquid cooling channel is consistent with the extension direction of the electrical connection component; the outer surface of the housing is provided with a concave-convex structure.

2. The high-voltage box as described in claim 1, characterized in that, The housing includes a first housing and a second housing connected to each other, and the electrical connection component is disposed between the first housing and the second housing; At least one of the first housing and the second housing is provided with the liquid cooling channel.

3. The high-voltage box as described in claim 2, characterized in that, The first box body is provided with a first liquid cooling channel, and the second box body is provided with a second liquid cooling channel; The first liquid cooling channel and the second liquid cooling channel are respectively disposed on opposite sides of the electrical connection assembly.

4. The high-voltage box as described in claim 3, characterized in that, The first liquid cooling channel and the second liquid cooling channel are independent of each other.

5. The high-voltage box as described in claim 4, characterized in that, The first liquid cooling channel is provided with a first liquid inlet and a first liquid outlet, and the first liquid inlet and the first liquid outlet are respectively located at both ends of the extension direction of the electrical connection assembly; The second liquid cooling channel is provided with a second liquid inlet and a second liquid outlet, which are respectively located at both ends of the extension direction of the electrical connection assembly; The first liquid inlet and the second liquid inlet are located on the same side, and the first liquid outlet and the second liquid outlet are located on the same side.

6. The high-voltage box as described in any one of claims 1 to 5, characterized in that, The liquid cooling channel is formed in the wall interlayer of the housing.

7. The high-voltage box as described in any one of claims 2 to 5, characterized in that, An installation groove is provided between the first box and the second box, and the electrical connection component is disposed in the installation groove.

8. The high-voltage box as described in claim 7, characterized in that, The mounting slot is formed in the first housing and is configured as a contoured slot that conforms to the shape of the electrical connection assembly.

9. The high-voltage box as described in claim 8, characterized in that, The electrical connection assembly includes a relay, a current sensor, and several electrical connectors. The relay and the current sensor are connected through one of the electrical connectors. The end of the relay away from the current sensor is connected to one of the electrical connectors, and the end of the current sensor away from the relay is connected to one of the electrical connectors. The mounting slot has a first slot, a second slot, and a plurality of connecting slots. The relay is located in the first slot, the current sensor is located in the second slot, and a plurality of electrical connectors are correspondingly located in the plurality of connecting slots.

10. A battery device, characterized in that, It includes a battery cell and a high-voltage box as described in any one of claims 1 to 9, wherein the electrical connection assembly of the high-voltage box is electrically connected to the battery cell.

11. An electrical appliance, characterized in that, Includes the battery device as described in claim 10.

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