End cover assembly, energy storage device and electric equipment

Abstract

The invention discloses an end cover assembly, an energy storage device and electric equipment. The end cover assembly comprises an end cover, a pole and a collector plate, the end cover is provided with a first surface and a second surface which are opposite in the thickness direction, and the end cover is provided with a mounting hole penetrating through the first surface and the second surface; the pole comprises a side wall and a bottom wall connected with the side wall, a cavity is defined by the side wall and the bottom wall, the cavity is provided with an opening opposite to the bottom wall, the bottom wall is provided with a through hole, the through hole is communicated with the cavity, and the side wall is arranged in the mounting hole in a penetrating manner; the flow collecting disc is located on one side of the second surface of the end cover and provided with a turned-over edge, and the turned-over edge penetrates through the through hole and is riveted to the bottom wall. In the end cover assembly provided by the embodiment of the invention, the through hole is formed in the bottom wall of the pole, so that the flange on the current collecting plate can penetrate through the through hole and is riveted with the bottom wall, the current collecting plate and the pole do not need to be connected through a bent adapter piece, the structure is simpler, the end cover assembly and the energy storage device are easier to manufacture, and the production efficiency is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, and more particularly, to an end cover assembly, an energy storage device, and an electric device. BACKGROUND

[0002] In the related art, an energy storage device includes a shell, an end cover assembly, and an electrode assembly. The end cover assembly includes a post and a current collector plate, and the post and the current collector plate are generally connected through a conversion sheet to realize conduction between the post and the current collector plate. However, the conversion sheet needs to be connected to the post and the current collector plate after at least two times of bending. The process of multiple times of bending makes the manufacturing process of the energy storage device complex, and affects the production efficiency of the energy storage device. SUMMARY

[0003] The present application provides an end cover assembly, an energy storage device, and an electric device.

[0004] The end cover assembly of the present application includes an end cover, a post, and a current collector plate. The end cover has a first surface and a second surface opposite to each other in the thickness direction, and the end cover is provided with a mounting hole penetrating through the first surface and the second surface. The post includes a side wall and a bottom wall connected to the side wall, and the side wall and the bottom wall enclose a cavity having an opening opposite to the bottom wall. The bottom wall is provided with a through hole in communication with the cavity, and the side wall is arranged in the mounting hole. The current collector plate is located on one side of the second surface of the end cover, and the current collector plate is provided with a flange arranged in the through hole and riveted to the bottom wall.

[0005] In the end cover assembly of the present application, the through hole formed by the bottom wall of the post allows the flange on the current collector plate to be arranged in the through hole and riveted to the bottom wall, and the current collector plate and the post do not need to be connected through a bent conversion sheet. Therefore, the structure is simpler, and the end cover assembly and the energy storage device are easier to manufacture, and the production efficiency is higher.

[0006] In some embodiments, the flange includes a first folded portion and a second folded portion. The first folded portion is connected to the second folded portion and the current collector plate, the first folded portion is arranged in the through hole, and the second folded portion and the current collector plate are respectively abutted to two opposite sides of the bottom wall, so that the flange is riveted to the bottom wall.

[0007] In this way, the second folded portion and the current collector plate are respectively abutted to two opposite sides of the bottom wall, so that the flange is more easily riveted to the bottom wall of the post, and the current collector plate and the post are reliably connected.

[0008] In some embodiments, the first folding portion is provided with a through hole penetrating through the first folding portion, the through hole being in communication with the cavity. In this way, the through hole makes the second folding portion easy to bend, so that the flange forms a riveting structure to be riveted with the bottom wall of the pole.

[0009] In some embodiments, the flange is integrally formed with the current collector plate; or, the flange is welded to the current collector plate. In this way, the flange is easy to form, and the manufacturing cost of the end cover assembly can be reduced.

[0010] In some embodiments, the pole includes a first portion and a second portion connected to the first portion, the first portion being formed with the bottom wall and part of the side wall, and the second portion being formed with the side wall. In this way, the first portion of the pole is formed with the bottom wall and part of the side wall, so that the bottom wall of the pole is easy to be manufactured by punching and stretching, which is beneficial to improve the manufacturing efficiency of the pole.

[0011] In some embodiments, the pole further includes a cover plate arranged in the cavity and covering the cavity. In this way, the cover plate can reduce the entry of external substances into the interior of the energy storage device from the cavity, and can also prevent the leakage of electrolyte in the energy storage device, thereby improving the reliability of the energy storage device.

[0012] In some embodiments, the end cover assembly includes a first insulating member arranged in the mounting hole, the side wall penetrating through the first insulating member, and the first insulating member isolating the end cover and the pole. In this way, the first insulating member can isolate the end cover and the pole, thereby reducing the risk of short circuit between the end cover and the pole.

[0013] In some embodiments, the end cover assembly includes a sealing member and a fixing ring, the sealing member being arranged between the second surface and the fixing ring, the sealing member being arranged around the mounting hole, one end of the first insulating member abutting against the fixing ring, and the fixing ring being fixedly connected with the pole.

[0014] In this way, the cooperation of the sealing member and the fixing ring can prevent external water vapor from entering the energy storage device from the mounting hole of the end cover, thereby improving the reliability of the energy storage device. In addition, the fixing ring can fix the pole, the first insulating member and the end cover as a whole, thereby improving the stability of the end cover assembly.

[0015] In some embodiments, the end cover assembly includes a second insulating member, the second insulating member being located between the end cover and the current collector plate, and the fixing ring pressing the second insulating member against the end cover. In this way, the second insulating member can isolate the end cover and the current collector plate, thereby reducing the risk of short circuit between the end cover and the current collector plate. In addition, the fixing ring pressing the second insulating member against the end cover can improve the stability of the installation of the second insulating member.

[0016] The energy storage device of the embodiment of the present application comprises:

[0017] An electrode assembly; and

[0018] The end cover assembly of any of the above embodiments, the electrode assembly is located on the side of the current collecting plate away from the end cover and connected with the current collecting plate.

[0019] The electric device of the embodiment of the present application comprises the energy storage device described above.

[0020] In summary, in one embodiment, in the end cover assembly, the energy storage device and the electric device of the embodiment of the present application, the flange on the current collecting plate can be arranged in the through hole and riveted with the bottom wall, the current collecting plate and the pole do not need to be connected through the bent adapter piece, the structure is simpler, the end cover assembly and the energy storage device are easier to manufacture, and the production efficiency is higher. In addition, the use of the cover plate, the first insulating piece and the second insulating piece can improve the stability of the end cover assembly and improve the safety of the end cover assembly.

[0021] Additional aspects and advantages of the present application will be made apparent from the following description of the embodiments of the present application, which will be given with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of embodiments, given with reference to the accompanying drawings, in which:

[0023] Figure 1 is a schematic plan view of the energy storage device of the embodiment of the present application;

[0024] Figure 2 is a schematic perspective view of the end cover assembly of the embodiment of the present application;

[0025] Figure 3 is a schematic exploded view of the end cover assembly of the embodiment of the present application;

[0026] Figure 4 is a schematic cross-sectional view of the end cover of the embodiment of the present application;

[0027] Figure 5 is a schematic partial perspective view of the pole of the embodiment of the present application.

[0028] EXPLANATION OF REFERENCE NUMERALS:

[0029] 1000 - energy storage device, 100 - end cap assembly, 10 - end cap, 11 - first surface, 12 - second surface, 13 - mounting hole, 20 - pole post, 21 - side wall, 22 - bottom wall, 221 - through hole, 23 - cavity, 24 - opening, 25 - first portion, 26 - second portion, 27 - cover plate, 30 - current collector plate, 40 - flange, 41 - first folded portion, 411 - through hole, 42 - second folded portion, 50 - first insulating member, 60 - sealing member, 70 - fixing ring, 80 - second insulating member, 200 - electrode assembly, 300 - housing. DETAILED DESCRIPTION

[0030] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein like reference numerals identify similar elements or features throughout the figures. The embodiments described below are merely examples and do not exhaust the scope of the present application.

[0031] In the present application, unless specifically stated and limited otherwise, the "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "on", "above" and "over" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The "under", "below" and "under" of a first feature to a second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0032] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplification, the components and arrangements of the specific examples are described in the following. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art can realize the application of other processes and / or the use of other materials.

[0033] Please refer to Figure 1 , Figure 1 The internal structure of the energy storage device 1000 is schematically shown. As shown in FIG. 1, the energy storage device 1000 includes an electrode assembly 200, a housing 300, and an end cap assembly 100. Figure 1As shown, the energy storage device 1000 disclosed in the embodiments of the present application comprises an end cover assembly 100, an electrode assembly 200 and a shell 300, the end cover assembly 100 is connected to the electrode assembly 200, and the electrode assembly 200 is accommodated in the shell 300.

[0034] Specifically, the energy storage device 1000 can be a cylindrical energy storage device or an energy storage device with other shapes. The electrode assembly 200 comprises a positive electrode sheet, a negative electrode sheet and a separator film. The energy storage device 1000 mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet comprises a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode current collector, the positive electrode current collector without the positive electrode active material layer protrudes from the positive electrode current collector with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer serves as a positive electrode tab.

[0035] For example, the lithium ion battery, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate, etc. The negative electrode sheet comprises a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer is coated on the surface of the negative electrode current collector, the negative electrode current collector without the negative electrode active material layer protrudes from the negative electrode current collector with the negative electrode active material layer, and the negative electrode current collector without the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. The material of the separator film can be PP or PE, etc. In addition, the electrode assembly 200 can be a winding structure or a laminated structure, and the embodiments of the present application are not limited thereto.

[0036] Please refer to Figures 2-5 In some embodiments, the end cover assembly 100 comprises an end cover 10, a pole 20 and a current collecting disc 30, the end cover 10 has a first surface 11 and a second surface 12 opposite to each other in the thickness direction, the end cover 10 is provided with a mounting hole 13 penetrating through the first surface 11 and the second surface 12; the pole 20 comprises a side wall 21 and a bottom wall 22 connected to the side wall 21, the side wall 21 and the bottom wall 22 enclose a cavity 23, the cavity 23 has an opening 24 opposite to the bottom wall 22, the bottom wall 22 is provided with a through hole 221, the through hole 221 communicates with the cavity 23, and the side wall 21 is arranged in the mounting hole 13; the current collecting disc 30 is located on one side of the second surface 12 of the end cover 10, and the current collecting disc 30 is provided with a flange 40, the flange 40 is arranged in the through hole 221 and is riveted to the bottom wall 22.

[0037] In the end cover assembly 100 of the embodiments of the present application, the through hole 221 formed by the bottom wall 22 of the pole 20 allows the flange 40 on the current collecting disc 30 to be arranged in the through hole 221 and riveted to the bottom wall 22, so that the current collecting disc 30 and the pole 20 do not need to be connected by a bent adapter piece, the structure is simpler, and the end cover assembly 100 and the energy storage device 1000 are easier to manufacture and have higher production efficiency.

[0038] Specifically, the end cover 10 is plate-shaped, or in other words, the end cover 10 is a plate-like part. The end cover 10 can have a circular, square or other shape. It can be understood that, in the case where the end cover 10 has a circular shape, the energy storage device 1000 can be a cylindrical energy storage device. The end cover 10 can be made of metal or the like, for example, the material of the end cover 10 can be aluminum alloy, so as to improve the strength of the end cover 10. The mounting hole 13 of the end cover 10 can facilitate the mounting of the pole 20, so that the pole 20 can be mounted on the end cover 10.

[0039] The pole 20 is a part for leading out the current formed by the electrode assembly 200. The side wall 21 and the bottom wall 22 of the pole 20 can be formed by stamping and stretching or the like. Due to the presence of the cavity 23, the flange 40 can be disposed in the through hole 221 and riveted with the bottom wall 22. The side wall 21 of the pole 20 can be cylindrical or have other shapes.

[0040] The current collector plate 30 is a part for converging the current formed by the electrode assembly 200, and therefore, the current collector plate 30 can be made of metal such as copper. The shape of the current collector plate 30 is similar to that of the end cover 10, so as to improve the compactness of the cooperation between the current collector plate 30 and the end cover 10. For example, the current collector plate 30 and the end cover 10 can both be similar to disc-shaped parts. The current collector plate 30 is located on the side of the second surface 12 of the end cover 10, that is, the current collector plate 30 does not partially embed into the end cover 10.

[0041] It should be noted that the flange 40 is riveted with the bottom wall 22, at this time, the flange 40 can electrically connect the current collector plate 30 and the pole 20, so that the current collector plate 30 can guide the current to the pole 20 through the flange 40.

[0042] Please refer to Figure 4 In some embodiments, the flange 40 includes a first folded portion 41 and a second folded portion 42, the first folded portion 41 connects the second folded portion 42 and the current collector plate 30, the first folded portion 41 is disposed in the through hole 221, and the second folded portion 42 and the current collector plate 30 abut on the two opposite sides of the bottom wall 22 respectively, so as to rivet the flange 40 with the bottom wall 22.

[0043] Specifically, the first folded portion 41 and the second folded portion 42 are bent, and the thickness direction of the second folded portion 42 is substantially parallel to the thickness direction of the current collector plate 30. The second folded portion 42 can be located in the cavity 23 and abut on the bottom wall 22. The current collector plate 30 is located outside the cavity 23 and abuts on the bottom wall 22.

[0044] In this way, the second folded portion 42 and the current collector plate 30 abut on the two opposite sides of the bottom wall 22 respectively, so that the flange 40 is more easily riveted with the bottom wall 22 of the pole 20, which is conducive to the reliable connection between the current collector plate 30 and the pole 20.

[0045] Referring to Figure 4 In some embodiments, the first folded portion 41 is provided with a through hole 411, the through hole 411 penetrating the first folded portion 41, and the through hole 411 being in communication with the cavity 23. In this way, the through hole 411 provides the second folded portion 42 with a bending deformation space, and the second folded portion 42 is more easily bent, so that the flange 40 forms a riveting structure to be riveted with the bottom wall 22 of the pole 20.

[0046] In one example, the through hole 411 can be a circular hole. Before the flange 40 is bent, the circular hole can be formed on the flange 40, and as the flange 40 forms the first folded portion 41 and the second folded portion 42, the through hole 411 is formed in the first folded portion 41.

[0047] In some embodiments, the flange 40 and the current collector plate 30 are integrally formed. In this way, the flange 40 is easy to form, and the manufacturing cost of the end cover assembly 100 can be reduced. In one example, the flange 40 and the current collector plate 30 can be formed by stamping or other processes using the same plate material.

[0048] In some embodiments, the flange 40 and the current collector plate 30 are welded and fixed. Alternatively, the flange 40 and the current collector plate 30 are separately formed, and the flange 40 is welded on the current collector plate 30 by welding process. In this way, the flange 40 is easy to form, and the manufacturing cost of the end cover assembly 100 can be reduced.

[0049] Referring to Figure 4 In some embodiments, the pole 20 includes a first portion 25 and a second portion 26 connected to the first portion 25, the first portion 25 being formed with the bottom wall 22 and the partial side wall 21, and the second portion 26 being formed with the side wall 21.

[0050] In this way, the first portion 25 of the pole 20 is formed with the bottom wall 22 and the partial side wall 21, so that the bottom wall 22 of the pole 20 is easy to be manufactured by stamping or other methods, which is beneficial to improve the manufacturing efficiency of the pole 20.

[0051] In some embodiments, the hardness of the first portion 25 is less than the hardness of the second portion 26, so that the pole 20 is more easily manufactured. In one example, the first portion 25 can be made of copper material. The second portion 26 is in a cylindrical shape, and the second portion 26 can be made of aluminum material. The first portion 25 and the second portion 26 can be combined together by stamping or welding process.

[0052] Referring to Figure 3 and Figure 4In some embodiments, the pole 20 further comprises a cover plate 27, which is arranged in the cavity 23 and covers the cavity 23. In this way, the cover plate 27 can reduce the entry of external substances into the interior of the energy storage device 1000 from the cavity 23, and can also prevent the leakage of electrolyte in the energy storage device 1000, thereby improving the reliability of the energy storage device 1000. In addition, the cover plate 27 can be welded with the flow guide fin of the energy storage device 1000, so that the size of the entire pole 20 is optimized and the structure is more compact.

[0053] It should be noted that the cover plate 27 completely encloses the cavity 23, for example, the edge of the cover plate 27 can be fixed with the side wall 21 by a welding process, so that the cover plate 27 is sealingly connected with the side wall 21.

[0054] In some embodiments, a step can be formed in the cavity 23, and the cover plate 27 can abut against the step, so that the position of the cover plate 27 is more stable.

[0055] Please refer to Figure 3 and Figure 4 In some embodiments, the end cover assembly 100 comprises a first insulating member 50 arranged in the mounting hole 13, and the side wall 21 penetrates the first insulating member 50, and the first insulating member 50 isolates the end cover 10 and the pole 20. In this way, the first insulating member 50 can isolate the end cover 10 and the pole 20, thereby reducing the risk of short circuit between the end cover 10 and the pole 20.

[0056] Specifically, the first insulating member 50 can be made of plastic. The first insulating member 50 can be in a cylindrical shape. The first insulating member 50 partially abuts against the first surface 11 of the end cover 10, thereby limiting the tendency of the first insulating member 50 to move towards the second surface 12 of the end cover 10. The outer peripheral surface of the first insulating member 50 can be non-circular, so that the first insulating member 50 cannot rotate relative to the end cover 10.

[0057] Please refer to Figure 3 and Figure 4 In some embodiments, the end cover assembly 100 comprises a sealing member 60 and a fixing ring 70, the sealing member 60 is arranged between the second surface 12 and the fixing ring 70, the sealing member 60 surrounds the mounting hole 13, one end of the first insulating member 50 abuts against the fixing ring 70, and the fixing ring 70 is fixedly connected with the pole 20.

[0058] In this way, the sealing member 60 and the fixing ring 70 cooperate to prevent external water vapor from entering the energy storage device 1000 from the mounting hole 13 of the end cover 10, thereby improving the reliability of the energy storage device 1000. In addition, the fixing ring 70 can fix the pole 20, the first insulating member 50 and the end cover 10 as a whole, thereby improving the stability of the end cover assembly 100.

[0059] Specifically, the sealing member 60 is annular and abuts against the second surface 12 of the end cover 10. The sealing member 60 can be a foam member, which is compressed by the fixing ring 70, so that the sealing member 60 seals the gap between the fixing ring 70 and the second surface 12 of the end cover 10. The fixing ring 70 can be welded to one end of the pole 20, so as to limit the position of the pole 20, and thus the pole 20 can be fixed relative to the end cover 10.

[0060] Referring to Figure 3 and Figure 4 In some embodiments, the end cover assembly 100 comprises a second insulation member 80, which is located between the end cover 10 and the current collector 30, and the fixing ring 70 presses the second insulation member 80 against the end cover 10. Alternatively, the second insulation member 80 is partially located between the end cover 10 and the current collector 30, and partially located between the end cover 10 and the fixing ring 70. In this way, the second insulation member 80 can isolate the end cover 10 and the current collector 30, and reduce the risk of short circuit between the end cover 10 and the current collector 30. In addition, the fixing ring 70 presses the second insulation member 80 against the end cover 10, which can improve the stability of the installation of the second insulation member 80.

[0061] In one example, during the assembly of the end cover assembly 100, the first insulation member 50 can be installed on the end cover 10 from the side of the first surface 11 of the end cover 10, and then the pole 20 is installed in the first insulation member 50. After that, the sealing member 60 and the second insulation member 80 are abutted against the second surface 12 of the end cover 10, and the fixing ring 70 is welded to one end of the pole 20, so that the sealing member 60 is compressed, thereby sealing the gap between the fixing ring 70 and the second surface 12 of the end cover 10. Then, the current collector 30 with the flange 40 is abutted against the second insulation member 80, and the flange 40 is riveted to the bottom wall 22 of the pole 20. Finally, the cover plate 27 is welded to the side wall 21 of the pole 20 and covers the cavity 23.

[0062] In the description of the embodiments of the present application, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0063] In the description of the specification, the description using the terms "one embodiment", "some embodiments", "certain embodiments", "an example", "a specific example", or "some examples" etc. means that the particular feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referred to the same embodiment or example. Also, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0064] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and that variations, modifications, substitutions and changes can be made to the above-described embodiments by those skilled in the art without departing from the scope of the present application.

Claims

1. An end cap assembly for an energy storage device, characterized in that, The end cap assembly includes: An end cap having a first surface and a second surface opposite to each other along the thickness direction, and the end cap having a mounting hole penetrating the first surface and the second surface; An electrode post, comprising a sidewall and a bottom wall connected to the sidewall, the sidewall and the bottom wall forming a cavity, the cavity having an opening opposite to the bottom wall, the bottom wall having a through hole communicating with the cavity, and the sidewall passing through the mounting hole; and A collector plate is located on one side of the second surface of the end cover. The collector plate has a flange that passes through the through hole and is riveted to the bottom wall.

2. The end cap assembly according to claim 1, characterized in that, The flange includes a first folded portion and a second folded portion. The first folded portion connects the second folded portion and the collecting plate. The first folded portion passes through the through hole. The second folded portion and the collecting plate abut against opposite sides of the bottom wall, so that the flange is riveted to the bottom wall.

3. The end cap assembly according to claim 2, characterized in that, The first folding part is provided with a through hole, which penetrates the first folding part and communicates with the cavity.

4. The end cap assembly according to claim 1, characterized in that, The flange and the collector plate are integrally formed; or, the flange is welded and fixed to the collector plate.

5. The end cap assembly according to claim 1, characterized in that, The pole post includes a first part and a second part connected to the first part, the first part having the bottom wall and part of the side wall, and the second part having the side wall.

6. The end cap assembly according to claim 1, characterized in that, The pole also includes a cover plate, which is disposed inside the cavity and covers the cavity.

7. The end cap assembly according to claim 1, characterized in that, The end cap assembly includes a first insulating element disposed in the mounting hole, the sidewall passing through the first insulating element, and the first insulating element isolating the end cap and the pole post.

8. The end cap assembly according to claim 7, characterized in that, The end cap assembly includes a seal and a retaining ring. The seal is disposed between the second surface and the retaining ring and surrounds the mounting hole. One end of the first insulating member abuts against the retaining ring, and the retaining ring is fixedly connected to the pole post.

9. The end cap assembly according to claim 8, characterized in that, The end cap assembly includes a second insulating element located between the end cap and the collector plate, and the retaining ring presses the second insulating element against the end cap.

10. An energy storage device, characterized in that, The energy storage device includes an end cap assembly and an electrode assembly as described in any one of claims 19, wherein the electrode assembly is located on the side of the collector disk opposite to the end cap and is connected to the collector disk.

11. An electrical appliance, characterized in that, The electrical equipment includes the energy storage device as described in claim 10.

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