Current collector plate, energy storage device and electric device

Abstract

The application relates to a current collecting plate, an energy storage device and an electric device. The current collecting plate comprises a disc body, a second sleeve and an elastic piece. The disc body is used for being welded with a positive electrode lug, the disc body is provided with a first sleeve, and the first sleeve protrudes from the surface of the disc body in the axial direction of the disc body. The second sleeve is used for being welded with a positive electrode top cover, the second sleeve is nested with the first sleeve, and the second sleeve can move in the axial direction of the disc body relative to the first sleeve. The elastic piece is arranged in the first sleeve, one end of the elastic piece abuts against the disc body, and the other end of the elastic piece abuts against the second sleeve.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a collector, energy storage device and power supply device. Background Technology

[0002] A secondary battery, also known as a rechargeable battery or accumulator, is a battery that can be recharged after discharge to reactivate its active materials and continue to be used. A typical secondary battery cell has a positive and a negative electrode tab at each end. During installation, the positive electrode tab is welded to the positive terminal cap via a positive current collector with a handle, and the negative electrode tab is welded to the negative terminal cap via a negative current collector. Due to manufacturing tolerances, the actual height of each cell varies slightly. To prevent the negative terminal cap from failing to seal properly after cells of different heights are installed in the casing, a flexible component is typically used to weld the negative current collector and negative terminal cap together.

[0003] However, during vibration testing or transportation of energy storage devices, the battery cells are subjected to vibrations in various directions. The elastic components on the negative electrode side of the cell will expand and contract, thus buffering and protecting the negative electrode tab. But the positive electrode current collector on the positive electrode side of the cell is welded and fixed to the positive electrode top cover. The expansion and contraction of the elastic components can easily lead to excessive amplitude of the cell in the axial direction, causing tension between the positive electrode tab and the positive electrode current collector. This can easily cause the positive electrode tab to tear, affecting the battery's performance and lifespan. Summary of the Invention

[0004] Therefore, it is necessary to provide a current collector, energy storage device, and power supply device to address the problem of the positive electrode tab being pulled and torn due to cell vibration.

[0005] On the one hand, this application provides a data collection disk, including:

[0006] The disc body is provided with a first sleeve, which protrudes from the surface of the disc body along the axial direction of the disc body.

[0007] A second sleeve, which nests with the first sleeve, and the second sleeve is movable relative to the first sleeve along the axial direction of the disc body; and

[0008] An elastic element is disposed in the first sleeve, with one end of the elastic element abutting against the disc body and the other end of the elastic element abutting against the second sleeve.

[0009] The technical solution will be further explained below:

[0010] In one embodiment, the second sleeve is fitted over the first sleeve, and the second sleeve contacts and engages with the first sleeve.

[0011] In one embodiment, the first sleeve has a first buckle at the end opposite to the disc body, and the first buckle extends toward the second sleeve; the second sleeve has a second buckle at the end near the disc body, and the second buckle extends toward the first sleeve, and the second buckle can engage with the first buckle.

[0012] In one embodiment, the first sleeve is interference-fitted with the second sleeve via the first snap fastener; and / or, the second sleeve is interference-fitted with the first sleeve via the second snap fastener.

[0013] In one embodiment, the first latch gradually increases in size in the radial direction of the disc body along the direction close to the disc body.

[0014] In one embodiment, the first sleeve is a cylindrical structure; or, the first sleeve includes a plurality of arc-shaped pieces, each of the arc-shaped pieces being spaced apart along the circumferential direction of the disc body, and the second sleeve being fitted over all of the arc-shaped pieces and in contact with each of the arc-shaped pieces.

[0015] In one embodiment, the disc body is further provided with a retaining ring, which surrounds the outer periphery of the first sleeve, and the inner diameter of the retaining ring is larger than the outer diameter of the second sleeve.

[0016] In one embodiment, the second sleeve has a protrusion on one side facing the disc body, and one end of the elastic member is sleeved on the protrusion.

[0017] In one embodiment, the disc body has a liquid passage hole, the first sleeve surrounds the outer periphery of the liquid passage hole, the boss portion has a liquid injection hole, the liquid injection hole is arranged opposite to the liquid passage hole, and a sealing element is provided in the liquid injection hole.

[0018] On the other hand, this application also provides an energy storage device, including the aforementioned collector plate.

[0019] On the other hand, this application also provides an electrical device including the above-mentioned energy storage device, which is used to supply power.

[0020] In the aforementioned current collector, a first sleeve protrudes from the plate body, and a second sleeve that can move axially is nested on the first sleeve. An elastic element is installed inside the first sleeve, with one end abutting the plate body and the other end abutting the second sleeve. This creates a soft connection between the second sleeve and the plate body that can buffer deformation. When the current collector is used in energy storage devices, the plate body can be welded to the positive electrode tab of the battery cell, and the second sleeve can be used to connect to the positive electrode top cover. The elastic element is initially in a compressed state. During vibration testing of the energy storage device or during transportation when the battery cell vibrates axially, when the battery cell moves towards the negative electrode cover, the compression of the elastic element decreases, releasing elastic potential energy and reducing the tension on the positive electrode tab during the moment of cell vibration. When the battery cell moves towards the positive electrode top cover, the compression of the elastic element increases, storing elastic potential energy, thereby suppressing the movement of the battery cell towards the positive electrode top cover and reducing the pressure on the positive electrode tab during the moment of cell vibration. This reduces the tensile force between the current collector and the positive electrode tab during cell vibration, thereby lowering the risk of the positive electrode tab breaking. Simultaneously, the nested fit between the first and second sleeves effectively increases the current-carrying capacity of the current collector, preventing instability in current-carrying capacity that may occur when the elastic element is in different states or during vibration and expansion. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the various components are shown as examples only and not necessarily to scale. In the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the structure of an energy storage device according to one embodiment.

[0025] Figure 2 for Figure 1 The energy storage device shown is a cross-sectional view along section AA.

[0026] Figure 3 This is a schematic diagram of the collector disk in one embodiment.

[0027] Figure 4 for Figure 3 The top view of the collector plate shown.

[0028] Figure 5 for Figure 4 A cross-sectional view of the central collector along section BB.

[0029] Figure 6 for Figure 5 The image shows a magnified view of the collector disk at point C.

[0030] Figure 7 This is a schematic diagram of the structure of the collector plate after the second sleeve is hidden, according to one embodiment.

[0031] Explanation of reference numerals in the attached figures:

[0032] 10. Shell; 11. Positive electrode top cover; 12. Negative electrode shell cover; 20. Cell; 30. Positive electrode current collector; 31. Disc body; 311. Liquid passage hole; 32. First sleeve; 321. First snap-fit; 3211. Mating surface; 3212. Inlet surface; 322. Arc-shaped piece; 33. Second sleeve; 331. Second snap-fit; 332. Boss part; 333. Liquid injection hole; 34. Elastic element; 35. Retaining ring; 36. Sealing element; 40. Negative electrode current collector; 41. Elastic connecting piece. Detailed Implementation

[0033] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0034] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0035] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0039] See Figure 1 as well as Figure 2This application provides an energy storage device in one embodiment, which can be a battery cell, battery module, battery pack, etc. Specifically, the energy storage device in one embodiment includes a battery cell 20, a housing 10, a negative current collector 40, and a positive current collector 30. The housing 10 has a positive top cover 11 and a negative housing cover 12 at its two ends, respectively. The battery cell 20 is disposed in the housing 10. The negative electrode tab of the battery cell 20 is welded to the negative current collector 40. The negative current collector 40 is welded to the negative housing cover 12 through an elastic connecting piece 41. The positive electrode tab of the battery cell 20 is welded to the positive current collector 30. The positive current collector 30 is welded to the positive top cover 11.

[0040] As mentioned earlier, due to the manufacturing tolerances of the battery cell 20 and the folding and compression of the elastic connecting piece 41, a large gap still exists between the negative electrode side of the battery cell 20 and the negative electrode cover 12 after the battery cell 20 is installed in the housing 10. During vibration testing of the energy storage device or during transportation, the battery cell 20 will be subjected to vibration in various directions. The elastic connecting piece 41 on the negative electrode side of the battery cell 20 will undergo expansion and contraction deformation, thereby buffering and protecting the negative electrode tab. However, the positive electrode current collector 30 on the positive electrode side of the battery cell 20 is welded and fixed to the positive electrode top cover 11. The expansion and contraction deformation of the elastic connecting piece 41 can easily lead to excessive amplitude of the battery cell 20 in the axial direction, resulting in pulling between the positive electrode tab of the battery cell 20 and the positive electrode current collector 30. This can cause the positive electrode tab to tear easily, affecting the battery's working performance and service life.

[0041] Based on this, one embodiment of this application also provides a current collector, which can be specifically used as a positive current collector 30 in the above-mentioned energy storage device to connect the positive electrode tab of the battery cell 20 to the positive electrode top cover 11. Specifically, see Figure 3 One embodiment of the manifold includes a disc body 31, a second sleeve 33, and an elastic member 34. Combined with... Figure 4 as well as Figure 5 The disc body 31 is used for welding to the positive electrode tab. The disc body 31 is provided with a first sleeve 32, which protrudes from the surface of the disc body 31 along the axial direction. The second sleeve 33 is used for welding to the positive electrode top cover 11. The second sleeve 33 is a cylindrical structure with one open end. The second sleeve 33 and the first sleeve 32 are nested together, and the second sleeve 33 can move relative to the first sleeve 32 along the axial direction of the disc body 31. The phrase "the second sleeve 33 and the first sleeve 32 are nested together" can mean that the second sleeve 33 is sleeved outside the first sleeve 32, or that the first sleeve 32 is sleeved outside the second sleeve 33. An elastic member 34 is provided in the first sleeve 32, with one end of the elastic member 34 abutting against the disc body 31 and the other end of the elastic member 34 abutting against the second sleeve 33.

[0042] In the aforementioned current collector, a first sleeve 32 protrudes from the disk body 31, and a second sleeve 33, which is axially movable, is nested on the first sleeve 32. Simultaneously, an elastic element 34 is provided inside the first sleeve 32, with one end of the elastic element 34 abutting against the disk body 31 and the other end abutting against the second sleeve 33. This creates a soft connection between the second sleeve 33 and the disk body 31 that can buffer deformation. When the current collector is used as a positive current collector 30 in an energy storage device, the disk body 31 of the current collector can be welded to the positive electrode tab of the battery cell 20, and the second sleeve 33 can be used to connect to the positive electrode tab. Cover 11, and the elastic element 34 is initially in a compressed state. During vibration testing of the energy storage device or during transportation, when the cell 20 vibrates axially, as the cell 20 moves towards the negative electrode cover 12, the compression of the elastic element 34 decreases, releasing elastic potential energy and reducing the tension on the positive electrode tab during vibration. When the cell 20 moves towards the positive electrode top cover 11, the compression of the elastic element 34 increases, storing elastic potential energy, thereby suppressing the movement of the cell 20 towards the positive electrode top cover 11 and reducing the pressure on the positive electrode tab during vibration. This reduces the tensile force between the current collector and the positive electrode tab during cell 20 vibration, thus lowering the risk of the positive electrode tab breaking. Simultaneously, the nested cooperation of the first sleeve 32 and the second sleeve 33 effectively increases the current carrying capacity of the current collector, avoiding instability in current carrying capacity that may occur when the elastic element 34 is in different states or during vibration and expansion.

[0043] See Figure 6 The second sleeve 33 is fitted outside the first sleeve 32, meaning the inner diameter of the second sleeve 33 is larger than the outer diameter of the first sleeve 32. This reduces the risk of interference between the axial movement of the second sleeve 33 and the elastic element 34 inside the first sleeve 32. Furthermore, the second sleeve 33 contacts and engages with the first sleeve 32 to share some of the flow with the elastic element 34.

[0044] It is worth noting that in another embodiment, the inner diameter of the first sleeve 32 may be larger than the outer diameter of the second sleeve 33. In this case, the first sleeve 32 is sleeved outside the second sleeve 33, and the elastic element 34 is disposed inside the second sleeve 33. This can also provide buffer protection for the positive electrode tab.

[0045] Specifically, see Figure 6In one embodiment, the first sleeve 32 has a first latch 321 at the end opposite to the disk body 31, and the first latch 321 extends towards the second sleeve 33, that is, the first latch 321 extends radially outward along the collector disk. The second sleeve 33 has a second latch 331 at the end near the disk body 31, and the second latch 331 extends towards the first sleeve 32, that is, the second latch 331 extends radially inward along the collector disk. The second latch 331 can engage with the first latch 321 to prevent the second sleeve 33 from disengaging from the first sleeve 32. Thus, when the cell 20 moves towards the negative electrode cover 12, causing the first sleeve 32 and the second sleeve 33 to move relative to each other to a near disengagement position, the first latch 321 can engage with the second latch 331, thereby preventing the second sleeve 33 from disengaging from the first sleeve 32, and thus ensuring the stable operation of the collector disk.

[0046] Optionally, in one embodiment, the second sleeve 33 is interference-fitted with the first sleeve 32 via a second latch 331. Specifically, the second latch 331 has a circular structure and is sleeved on the outside of the first sleeve 32, thus ensuring close contact between the second sleeve 33 and the first sleeve 32, thereby improving the flow capacity. Simultaneously, the interference fit between the second sleeve 33 and the first sleeve 32 via the second latch 331 meets wear requirements. Even after the second latch 331 wears down over time, it still ensures stable contact between the second sleeve 33 and the first sleeve 32, allowing the first sleeve 32 and the second sleeve 33 to stably share a portion of the flow.

[0047] Similarly, in one embodiment, the first sleeve 32 can also be press-fitted with the second sleeve 33 through the first buckle 321, which can also improve the flow capacity. At the same time, even after the first buckle 321 is worn, the first sleeve 32 and the second sleeve 33 can still be kept in stable contact.

[0048] See Figure 6 Along the direction close to the disc body 31, the size of the first latch 321 gradually increases in the radial direction of the disc body 31, that is, the upper end of the first latch 321 is smaller and the lower end is larger, so that the second sleeve 33 can be more easily fitted onto the first sleeve 321 during assembly. Specifically, the first latch 321 includes a mating surface 3211 facing the disc body 31 and a guide surface 3212 facing away from the disc body 31. The mating surface 3211 is arranged parallel to the plane of the disc body 31. When the first latch 321 and the second latch 331 are engaged, the mating surface 3211 abuts against the second latch 331, thereby ensuring the engagement stability of the first latch 321 and the second latch 331. The guide surface 3212 is inclined relative to the plane of the disc body 31. Specifically, the guide surface 3212 is a conical surface, so that the second sleeve 33 can be more easily fitted onto the first sleeve 321.

[0049] See Figure 7 Optionally, in one embodiment, the first sleeve 32 includes a plurality of arc-shaped pieces 322, which are spaced apart along the circumferential direction of the disc body 31. The second sleeve 33 is fitted over all the arc-shaped pieces 322 and contacts and engages with each of the arc-shaped pieces 322. For example, see [link to example]. Figure 7 The first sleeve 32 includes two arc-shaped pieces 322, each of which is a quarter-circular arc structure. The two arc-shaped pieces 322 are arranged at intervals along the circumference of the disk body 31. The second sleeve 33 is fitted over all the arc-shaped pieces 322 and contacts and engages with each arc-shaped piece 322 to share the current. At the same time, the interval between adjacent arc-shaped pieces 322 provides deformation space for each arc-shaped piece 322. When the second sleeve 33 is fitted into the first sleeve 32, the ends of each arc-shaped piece 322 facing away from the disk body 31 can converge inward to facilitate the smooth fitting of the second sleeve 33 into the first sleeve 32.

[0050] Understandably, the more arc-shaped plates 322 there are, the stronger the current-sharing capacity. In other embodiments, the number of arc-shaped plates 322 can be increased or decreased according to the needs of the cell 20. For example, in other embodiments, the number of arc-shaped plates 322 can also be three, four, five or more. No limitation is made here.

[0051] Understandably, in another embodiment, the first sleeve 32 can also be a cylindrical structure. In this case, the contact area between the first sleeve 32 and the second sleeve 33 is the largest, the flow capacity is the best, and the flow can be better shared.

[0052] See Figure 3 The disk body 31 also has a protruding retaining ring 35, which surrounds the outer periphery of the first sleeve 32, and the inner diameter of the retaining ring 35 is larger than the outer diameter of the second sleeve 33. Specifically, during the relative movement of the first sleeve 32 and the second sleeve 33, friction between the first sleeve 32 and the second sleeve 33 will generate debris or wires and other impurities. The retaining ring 35 can block debris or wires and other impurities, preventing them from migrating to the negative electrode side with the vibration of the cell 20, thus ensuring the safe and stable use of the energy storage device.

[0053] See Figure 6 In one embodiment, the second sleeve 33 has a protrusion 332 on the side facing the disc 31, and one end of the elastic member 34 is sleeved on the protrusion 332. The protrusion 332 can limit the elastic member 34 and prevent the elastic member 34 from undergoing radial displacement during use.

[0054] See also Figure 6The disc body 31 has a liquid passage hole 311, and the first sleeve 32 surrounds the outer periphery of the liquid passage hole 311. The boss portion 332 has a liquid injection hole 333, which is opposite to the liquid passage hole. A sealing element 36 is provided in the liquid injection hole 333 for sealing the liquid injection hole 333. Electrolyte can be injected into the battery cell 20 through the liquid injection hole 333. After the liquid injection is completed, the sealing element 36 is inserted into the liquid injection hole 333 to seal the liquid injection hole 333 and prevent electrolyte leakage. At the same time, since the elastic element 34 is sleeved outside the boss portion 332, it does not affect the electrolyte injection operation.

[0055] Optionally, in one embodiment, the elastic element 34 is a cylindrical spring. Let the maximum process deviation of the height of the battery cell 20 be Δh, the original length of the elastic element 34 be L0, and the welding station height of the conventional positive current collector 30 be h0. Then, L0 = 1.3 * (Δh + h0). Thus, after the energy storage device is assembled, the elastic element 34 can be in a compressed state. Further, the axial height of the first sleeve 32 is 0.5L0, and the axial height of the second sleeve 33 is also 0.5L0. Thus, when the first latch 321 and the second latch 331 engage, that is, when the battery cell 20 moves towards the negative electrode cover 12 to its maximum stroke, the elastic element 34 remains in a compressed state, thereby reducing the tension on the positive electrode tab.

[0056] This application also provides an electrical device according to one embodiment, which includes the energy storage device of any of the above embodiments. Further, the electrical device also includes an electrical-consuming body, which is electrically connected to the energy storage device. Specifically, the electrical-consuming body can take many forms, such as mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys, and power tools, etc., and is not limited thereto.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A collector disk, characterized in that, include: The disc body is provided with a first sleeve, which protrudes from the surface of the disc body along the axial direction of the disc body. The second sleeve is nested with the first sleeve, and the second sleeve can move relative to the first sleeve along the axial direction of the disc body; as well as An elastic element is disposed in the first sleeve, with one end of the elastic element abutting against the disc body and the other end of the elastic element abutting against the second sleeve.

2. The collector disk according to claim 1, characterized in that, The second sleeve is fitted over the first sleeve, and the second sleeve is in contact with and engaged with the first sleeve.

3. The collector disk according to claim 2, characterized in that, The first sleeve has a first buckle at the end opposite to the disc body, and the first buckle extends toward the second sleeve; the second sleeve has a second buckle at the end near the disc body, and the second buckle extends toward the first sleeve, and the second buckle can engage with the first buckle.

4. The collector disk according to claim 3, characterized in that, The first sleeve is in an interference fit with the second sleeve via the first buckle; and / or, the second sleeve is in an interference fit with the first sleeve via the second buckle.

5. The collector disk according to claim 3, characterized in that, Along the direction close to the disc body, the size of the first latch gradually increases in the radial direction of the disc body.

6. The collector disk according to claim 1, characterized in that, The first sleeve is a cylindrical structure; or, the first sleeve includes a plurality of arc-shaped pieces, each of the arc-shaped pieces being arranged at intervals along the circumferential direction of the disc body, and the second sleeve being sleeved over all the arc-shaped pieces and in contact with each of the arc-shaped pieces.

7. The collector disk according to claim 1, characterized in that, The disc body is also provided with a retaining ring, which surrounds the outer periphery of the first sleeve, and the inner diameter of the retaining ring is larger than the outer diameter of the second sleeve.

8. The collector disk according to claim 1, characterized in that, The second sleeve has a protruding boss on one side facing the disc body, and one end of the elastic member is sleeved on the protruding boss.

9. The collector disk according to claim 8, characterized in that, The disc body has a liquid passage hole, the first sleeve surrounds the outer periphery of the liquid passage hole, the boss portion has a liquid injection hole, the liquid injection hole is arranged opposite to the liquid passage hole, and a sealing element is provided in the liquid injection hole.

10. An energy storage device, characterized in that, Includes the collector disk as described in any one of claims 1-9.

11. An electrical appliance, characterized in that, Includes the energy storage device as described in claim 10, wherein the energy storage device is used for power supply.

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