Top cover assembly, single battery, battery and electric equipment

Abstract

The utility model relates to a top cover assembly, a single battery, a battery and electric equipment, and relates to the technical field of batteries, the top cover assembly comprises a cover plate and a pole assembly, the cover plate is provided with a mounting through hole, and the edge of the mounting through hole is convexly provided with a support column; and the pole assembly sleeves the support column and is used for sealing one end of the mounting through hole. According to the top cover assembly, the single battery, the battery and the electric equipment, the problem that the pole assembly is easy to sink can be improved, and the assembling stability of the pole assembly is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a top cover assembly, a single cell, a battery, and an electrical device. Background Technology

[0002] In the battery structure, the terminals are mounted on the top cover, and the upper plastic layer serves as insulation between the terminals and the top cover. Furthermore, in practical applications, the upper plastic layer can also provide support for the terminals, improving their assembly stability. However, in related technologies, the upper plastic layer tends to soften partially when heated, leading to a decrease in strength and an inability to provide the original support for the terminals. This can cause the terminals to sink, affecting their assembly stability. Utility Model Content

[0003] To address the aforementioned technical problems, embodiments of this application provide a top cover assembly, a single battery cell, a battery, and an electrical device, which can improve the problem of easy sinking of the terminal assembly and enhance the assembly stability of the terminal assembly.

[0004] In a first aspect, a top cover assembly is provided, comprising:

[0005] The cover plate is provided with a mounting through hole, and a support post protrudes from the edge of the mounting through hole;

[0006] An electrode assembly is sleeved on the support post, and the electrode assembly is used to close one end of the mounting through hole.

[0007] According to a first aspect of this application, the top cover assembly further includes:

[0008] A sealing ring is fitted into the inner cavity of the pole assembly, and the sealing ring is placed between the support post and the pole assembly.

[0009] According to a first aspect of this application, the top cover assembly further includes:

[0010] An insulating component is provided, which is located on opposite sides of the cover plate, and the insulating component is provided with a mating post. The mating post mates with the mounting through hole, and a portion of the mating post extends out of the mounting through hole to abut against the pole assembly.

[0011] According to a first aspect of this application, the pole assembly includes:

[0012] A connecting wall is used to close one end of the mounting through hole;

[0013] A peripheral wall is provided around the edge of the connecting wall, and the peripheral wall is fitted around the outside of the support column;

[0014] The connecting wall is made of a conductive material, and the peripheral wall is made of an insulating material.

[0015] According to a first aspect of this application, the connecting wall comprises a copper plate and an aluminum plate stacked together, the copper plate being located on the side of the aluminum plate closer to the support column, and the thickness of the copper plate being less than the thickness of the aluminum plate.

[0016] According to a first aspect of this application, the inner wall of the pole assembly is threadedly engaged with the outer wall of the support column.

[0017] Secondly, a single-cell battery is also provided, comprising:

[0018] The housing has a receiving cavity with an opening;

[0019] The top cover assembly as described in the previous embodiment is disposed on the top of the housing to close the opening;

[0020] A battery cell is disposed within the receiving cavity. The battery cell has tabs. The mounting through hole penetrates the support post. A portion of the tabs extends into the mounting through hole and is connected to the pole assembly.

[0021] Thirdly, a single-cell battery is also provided, comprising:

[0022] The housing has a receiving cavity with an opening;

[0023] The top cover assembly as described in the previous embodiment is disposed on the top of the housing to close the opening;

[0024] The adapter piece has a mounting through hole that penetrates the support post, and a portion of the adapter piece extends into the mounting through hole and is connected to the pole post assembly.

[0025] A battery cell is disposed within the receiving cavity, and the battery cell is provided with tabs, which are connected to the adapter plate.

[0026] Fourthly, a battery is also provided, including a single cell battery as described in the previous embodiments.

[0027] Fifthly, an electrical device is also provided, including a battery as described in the previous embodiments.

[0028] The top cover assembly, single cell, battery, and electrical device provided in this application embodiment support the terminal assembly by protruding support columns on the cover plate. As the operating temperature of the single cell gradually increases, the support columns, made of high-temperature resistant material, are less prone to softening compared to plastic materials. This ensures continuous support for the terminal assembly, thereby improving the problem of the terminal assembly easily sinking and effectively enhancing the assembly stability of the terminal assembly. Attached Figure Description

[0029] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0030] Figure 1 An exploded view of a top cover assembly provided for an exemplary embodiment of this application.

[0031] Figure 2 A partial cross-sectional view of a top cover assembly provided for an exemplary embodiment of this application.

[0032] Figure 3 A partial cross-sectional view of a top cover assembly provided for another exemplary embodiment of this application.

[0033] Figure 4 A partial cross-sectional view of a top cover assembly provided for another exemplary embodiment of this application.

[0034] Figure 5 This is a schematic diagram of the top cover assembly and battery cell provided for an exemplary embodiment of this application.

[0035] Figure 6 A schematic diagram of the top cover assembly and battery cell provided for another exemplary embodiment of this application.

[0036] Reference numerals: 100-Top cover assembly; 110-Cover plate; 111-Mounting through hole; 112-Support post; 120-Pole post assembly; 121-Connecting wall; 1211-Copper plate; 1212-Aluminum plate; 122-Peripheral wall; 130-Insulating component; 131-Matching post; 140-Sealing ring; 200-Battery cell; 210-Pole tab; 300-Adapter piece. Detailed Implementation

[0037] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein.

[0038] Figure 1 An exploded view of a top cover assembly provided for an exemplary embodiment of this application. Figure 2 A partial cross-sectional view of a top cover assembly provided for an exemplary embodiment of this application. Figure 1 and Figure 2As shown, the top cover assembly 100 provided in this application embodiment may include a cover plate 110. The cover plate 110 is provided with a mounting through hole 111. A support post 112 protrudes from the edge of the mounting through hole 111, that is, the support post 112 protrudes from the surface of the cover plate 110.

[0039] like Figure 1 and Figure 2 As shown, the top cover assembly 100 may also include a pole post assembly 120, which is sleeved on the support post 112.

[0040] It should be noted that the mounting through hole 111 penetrates the support post 112, meaning that the inner cavity of the support post 112 can be considered as a portion of the mounting through hole 111. This facilitates the installation of the tab 210 described later. Figure 5 (as shown in the image) or adapter 300 ( Figure 6 (As shown in the figure) it is connected to the pole assembly 120 through the mounting through hole 111.

[0041] In practical applications, the pole assembly 120 can be used to connect the tab 210 and external electrical components to transmit current between the tab 210 and the external electrical components.

[0042] It should be noted that, under normal conditions, the pole post assembly 120 is fitted onto the support post 112, and the support post 112 limits the position of the pole post assembly 120 to prevent it from shaking arbitrarily.

[0043] After the terminal assembly 120 is fitted onto the support post 112, the terminal assembly 120 can be used to seal one end of the mounting through hole 111. In this way, the terminal assembly 120 can prevent particulate matter, moisture, etc. from entering the cell through the mounting through hole 111. At the same time, it can also prevent the electrolyte inside the cell from leaking through the mounting through hole 111, thus achieving a good sealing effect.

[0044] In one embodiment, the aforementioned electrode assembly 120 can be applied to either the positive electrode or the negative electrode.

[0045] In one embodiment, the support post 112 and the cover plate 110 are made of different materials. Generally, the cover plate 110 is made of metal, while the support post 112 can be made of a material with insulating properties and high temperature resistance (such as ceramic, polytetrafluoroethylene, etc.). In this case, on the one hand, the support post 112 can be used to isolate the terminal assembly 120 and the cover plate 110, avoiding electrical connection between the terminal assembly 120 and the cover plate 110 and causing a short circuit risk; on the other hand, as the operating temperature of the single battery cell gradually increases, since the support post 112 is made of a high temperature resistant material, it is less prone to softening compared to plastic materials, thus ensuring continuous support for the terminal assembly 120, thereby improving the problem of the terminal assembly 120 easily sinking and effectively improving the assembly stability of the terminal assembly 120.

[0046] In one embodiment, the support post 112 can also be made of the same type of material as the cover plate 110. That is, both the support post 112 and the cover plate 110 are made of metal. In this case, as the operating temperature of the individual battery gradually increases, since the support post 112 is made of metal (which also has high-temperature resistance), it is less prone to softening compared to plastic materials. This ensures continuous support for the terminal assembly 120, thereby improving the problem of the terminal assembly 120 easily sinking and effectively enhancing the assembly stability of the terminal assembly 120. In this case, to prevent direct contact between the terminal assembly 120 and the support post 112, which could cause a short circuit, an insulating sealing ring 140 is usually provided between the support post 112 and the terminal assembly 120. The details of the sealing ring 140 are described below.

[0047] Specifically, such as Figure 1 and Figure 2 As shown, the top cover assembly 100 may also include a sealing ring 140, which is fitted into the inner cavity of the pole post assembly 120 and is placed between the support post 112 and the pole post assembly 120.

[0048] It should be noted that the sealing ring 140 is generally made of insulating material. The sealing ring 140 can prevent the support post 112 from directly contacting the pole post assembly 120, thus avoiding the risk of short circuit.

[0049] It should be noted that the sealing ring 140 can fill the gap between the support post 112 and the terminal assembly 120. The sealing ring 140 can prevent the electrolyte inside the single cell from leaking through the gap between the support post 112 and the terminal assembly 120. At the same time, it can also prevent external particles, moisture, etc. from entering the single cell through the gap between the support post 112 and the terminal assembly 120 and the mounting through hole 111, thereby improving the overall sealing performance of the single cell.

[0050] It should be noted that, since the support post 112 protrudes relative to the surface of the cover plate 110, and the sealing ring 140 abuts against the end of the support post 112 away from the cover plate 110, the sealing ring 140 can be positioned relatively far from the cover plate 110. Thus, in practical applications, when the top cover assembly 100 is assembled on the battery cell 200 (… Figure 5 and Figure 6 After the sealing ring 140 is placed on top of the cell 200 (as shown in the figure), it can be kept at a greater distance from the top of the cell 200, so that the sealing ring 140 is kept away from the electrolyte environment and the sealing ring 140 is not affected by the electrolyte.

[0051] like Figure 1 and Figure 2 As shown, the top cover assembly 100 may further include an insulating element 130, which is located on opposite sides of the cover plate 110, along with the terminal assembly 120. In actual assembly, the insulating element 130 is disposed on the inner side of the cover plate 110 (i.e., the side of the cover plate 110 closest to the battery cell 200), and the terminal assembly 120 is disposed on the outer side of the cover plate 110 (i.e., the side of the cover plate 110 away from the battery cell 200).

[0052] like Figure 1 and Figure 2 As shown, the insulating component 130 is provided with a mating post 131, which mates with the mounting through hole 111, thereby improving the assembly stability between the insulating component 130 and the cover plate 110.

[0053] It should be noted that a portion of the mating post 131 extends out of the mounting through hole 111, and the sealing ring 140 is fitted inside the pole post assembly 120. After the pole post assembly 120 is fitted onto the support post 112, the sealing ring 140 abuts against the support post 112, and the sealing ring 140 can be fitted onto the portion of the mating post 131 that extends out of the mounting through hole 111. This further improves the sealing performance between the pole post assembly 120, the sealing ring 140, and the mating post 131.

[0054] It should be noted that in practical applications, the tab 210 of a single battery cell ( Figure 5 (as shown in the image) or adapter 300 ( Figure 6 As shown in the figure, the pole assembly 120 is connected through the mounting through hole 111, and the mating post 131 is fitted inside the mounting through hole 111. When the support post 112 is made of the same metal material as the cover plate 110, the mating post 131 can isolate the support post 112 from the internal pole tab 210 or adapter plate 300 to avoid short circuit accidents.

[0055] In one embodiment, the insulating element 130 may be made of materials such as plastic or rubber.

[0056] like Figure 2 As shown, the pole assembly 120 may include a connecting wall 121 and a peripheral wall 122, with the peripheral wall 122 surrounding the edge of the connecting wall 121. In actual assembly, the peripheral wall 122 is fitted onto the outside of the support post 112. The connecting wall 121 is used to close one end of the mounting through hole 111, that is, the peripheral wall 122 plays a role in enhancing assembly stability. The connecting wall 121 is used to abut against the mating post 131 in the aforementioned insulating component 130. The connecting wall 121 and the support post 112 press against the sealing ring 140 to achieve the aforementioned sealing effect. The connecting wall 121 can also be used to connect the tab 210 or the adapter piece 300 to achieve an electrical connection.

[0057] It should be noted that the connecting wall 121 is made of conductive material, so that the connecting wall 121 can be electrically connected to the tab 210 or the adapter 300 to achieve a stable electrical connection.

[0058] It should be noted that the peripheral wall 122 is made of insulating material. When the support column 112 is made of the same type of metal as the cover plate 110, the peripheral wall 122 cooperates with the support column 112. The peripheral wall 122 can prevent the support column 112 from being electrically connected to the connecting wall 121, thus avoiding short circuit accidents.

[0059] It should be noted that since the peripheral wall 122 is made of insulating material, the end of the peripheral wall 122 away from the connecting wall 121 can directly abut against the cover plate 110. Thus, not only can the support post 112 support the terminal assembly 120, but the cover plate 110 can also support the terminal assembly 120. As the operating temperature of the individual battery cells gradually increases, neither the cover plate 110 nor the support post 112 is prone to softening, ensuring continuous support for the terminal assembly 120. This improves the problem of the terminal assembly 120 easily sinking and effectively enhances the assembly stability of the terminal assembly 120.

[0060] In one embodiment, the peripheral wall 122 can be made of materials such as PPS, ceramics, or polytetrafluoroethylene.

[0061] In one embodiment, the peripheral wall 122 and the connecting wall 121 can be relatively fixed by means of bonding, nano-injection molding or other methods.

[0062] Figure 3 A partial cross-sectional view of a top cover assembly provided for another exemplary embodiment of this application. (See attached image.) Figure 3 As shown, the connecting wall 121 may include a copper plate 1211 and an aluminum plate 1212 stacked together, with the copper plate 1211 located on the side of the aluminum plate 1212 closer to the support column 112.

[0063] It should be noted that when the electrode assembly 120 is used in the case of the negative electrode, since the negative electrode tab 210 is generally made of copper foil, the side of the connecting wall 121 near the support post 112 is set as a copper plate 1211. In this way, the copper plate 1211 and the copper foil are made of the same material, which makes it easier to weld them together and the welding effect is better.

[0064] In addition, the thickness of the copper plate 1211 is less than that of the aluminum plate 1212. Compared with using a single piece of copper plate 1211, the composite structure of the thicker aluminum plate 1212 and the thinner copper plate 1211 can, on the one hand, ensure the welding effect between the copper plate 1211 and the negative electrode tab, and on the other hand, meet the requirements of lightweight and low cost (aluminum is lighter and cheaper than copper of the same volume).

[0065] In one embodiment, when the electrode assembly 120 is applied to the positive electrode, since the positive electrode tab 210 is generally made of aluminum foil, the connecting wall 121 can be made of a single piece of aluminum plate 1212, which can facilitate the welding of the connecting wall 121 to the positive electrode tab, and also meet the requirements of lightweight and low cost.

[0066] Figure 4 A partial cross-sectional view of a top cover assembly provided for another exemplary embodiment of this application. (See attached image.) Figure 4 As shown, the inner wall of the pole post assembly 120 (e.g., the peripheral wall 122 described above) is threaded into the outer wall of the support post 112. This improves the assembly stability between the pole post assembly 120 and the support post 112.

[0067] In one embodiment, the inner wall of the pole assembly 120 and the outer wall of the support column 112 can also be relatively fixed by means of bonding, nano-injection molding or other methods.

[0068] In one embodiment, during the process of assembling the pole post assembly 120 onto the support post 112, the distance between the pole post assembly 120 and the cover plate 110 can be adjusted by rotating the pole post assembly 120, and the compression ratio of the pole post assembly 120 on the sealing ring 140 can also be adjusted.

[0069] It should be noted that if the compression ratio of the sealing ring 140 is too small, its sealing performance will be poor; if the compression ratio is too large, it will cause the sealing ring 140 to lose its elasticity, damaging it and affecting its service life. In practical applications, the compression ratio of the sealing ring 140 is generally adjusted between 10% and 50% by rotating the pole post assembly 120.

[0070] Figure 5 This is a schematic diagram of the top cover assembly and battery cell provided for an exemplary embodiment of this application. Figure 5As shown, in one embodiment, a single battery cell may include a housing, a cell 200, and a top cover assembly 100 as described in the previous embodiment. The housing has a receiving cavity with an opening, the cell 200 is disposed in the receiving cavity, and the top cover assembly 100 is disposed on the top of the housing. The top cover assembly 100 can close the opening, and the housing and the top cover assembly 100 can protect the cell 200.

[0071] It should be noted that the battery cell 200 is provided with a tab 210, a portion of which can extend into the mounting through hole 111 (the inner cavity of the support post 112 belongs to one section of the mounting through hole 111), which facilitates the electrical connection between the tab 210 and the pole assembly 120.

[0072] Figure 6 A schematic diagram of the top cover assembly and battery cell provided for another exemplary embodiment of this application. (See attached diagram.) Figure 6 As shown, in one embodiment, a single battery cell may include a housing, an adapter 300, a battery cell 200, and a top cover assembly 100 as described in the previous embodiment. The housing has a receiving cavity with an opening, the battery cell 200 is disposed in the receiving cavity, and the top cover assembly 100 is disposed on the top of the housing. The top cover assembly 100 can close the opening, and the housing and the top cover assembly 100 can protect the battery cell 200.

[0073] like Figure 6 As shown, the battery cell 200 is provided with a tab 210, and a portion of the adapter piece 300 extends into the mounting through hole 111 (the inner cavity of the support post 112 belongs to one section of the mounting through hole 111). The adapter piece 300 can connect the tab 210 and the terminal assembly 120. In other words, the adapter piece 300 can transmit current between the tab 210 and the terminal assembly 120, which facilitates a stable electrical connection between the tab 210 and the terminal assembly 120.

[0074] This application also provides a battery comprising a single cell as described in the previous embodiments and having all the functions of the single cell.

[0075] This application also provides an electrical device that includes a battery as described in the previous embodiment and has all the functions of the battery.

[0076] The beneficial effects of the single battery, battery and electrical equipment provided in the embodiments of this application can be referred to the beneficial effects of the aforementioned top cover assembly 100.

[0077] In one embodiment, the battery cell may be a lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, and its external outline may be cylindrical, flat, cuboid, or other shapes, but is not limited thereto.

[0078] In one embodiment, the battery can be a battery pack or a battery module. When the battery is a battery pack, the battery pack specifically includes a battery management system (BMS) and multiple battery cells. The multiple battery cells can be electrically connected in series, parallel, or a combination of series and parallel connections, and communicate with the battery management system to form a battery pack. The battery management system controls and monitors the operating status of each battery cell. Alternatively, multiple battery cells can first be connected in series and / or parallel, and then connected with a module management system to form a battery module. These battery modules can then be electrically connected in series, parallel, or a combination of series and parallel connections, and together with the battery management system, form a battery pack.

[0079] In one embodiment, the aforementioned electrical equipment includes the aforementioned battery and is capable of being powered by the aforementioned battery. The aforementioned electrical equipment may be a vehicle, mobile phone, portable device, laptop, ship, spacecraft, electric toy, power tool, energy storage device, amusement equipment, elevator, and lifting equipment, etc. Vehicles may be gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles; new energy vehicles may be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, or electric airplane toys, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.; energy storage devices may be energy storage walls, base station energy storage, container energy storage, etc.; amusement equipment may be a carousel, a drop tower, etc.

[0080] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0081] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0082] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0083] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0084] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A top cover assembly, characterized in that, include: The cover plate (110) is provided with a mounting through hole (111), and a support post (112) protrudes from the edge of the mounting through hole (111); The pole post assembly (120) is sleeved on the support post (112) and is used to close one end of the mounting through hole (111).

2. The top cover assembly according to claim 1, characterized in that, The top cover assembly also includes: A sealing ring (140) is fitted into the inner cavity of the pole assembly (120), and the sealing ring (140) is placed between the support post (112) and the pole assembly (120).

3. The top cover assembly according to claim 1, characterized in that, The top cover assembly also includes: An insulating component (130) is provided, which is located on opposite sides of the cover plate (110) and the pole assembly (120). The insulating component (130) is provided with a mating post (131), which mates with the mounting through hole (111), and a portion of the mating post (131) extends out of the mounting through hole (111) to abut against the pole assembly (120).

4. The top cover assembly according to claim 1, characterized in that, The pole assembly (120) includes: A connecting wall (121) is used to close one end of the mounting through hole (111); A peripheral wall (122) is provided around the edge of the connecting wall (121), and the peripheral wall (122) is sleeved on the outside of the support column (112); The connecting wall (121) is made of a conductive material, and the peripheral wall (122) is made of an insulating material.

5. The top cover assembly according to claim 4, characterized in that, The connecting wall (121) includes a copper plate (1211) and an aluminum plate (1212) stacked together. The copper plate (1211) is located on the side of the aluminum plate (1212) close to the support column (112). The thickness of the copper plate (1211) is less than the thickness of the aluminum plate (1212).

6. The top cover assembly according to any one of claims 1 to 5, characterized in that, The inner wall of the pole assembly (120) is threadedly engaged with the outer wall of the support column (112).

7. A single-cell battery, characterized in that, include: The housing has a receiving cavity with an opening; The top cover assembly as described in any one of claims 1 to 6 is disposed on the top of the housing to close the opening; A battery cell (200) is disposed in the receiving cavity. The battery cell (200) is provided with a tab (210). The mounting through hole (111) penetrates the support post (112). A portion of the tab (210) extends into the mounting through hole (111) and is connected to the pole assembly (120).

8. A single-cell battery, characterized in that, include: The housing has a receiving cavity with an opening; The top cover assembly as described in any one of claims 1 to 6 is disposed on the top of the housing to close the opening; The adapter piece (300) has a mounting through hole (111) that penetrates the support post (112), and a portion of the adapter piece (300) extends into the mounting through hole (111) and is connected to the pole post assembly (120). A battery cell (200) is disposed in the receiving cavity. The battery cell (200) is provided with a tab (210), which is connected to the adapter plate (300).

9. A battery, characterized in that, Includes the single-cell battery as described in claim 7 or 8.

10. An electrical appliance, characterized in that, Includes the battery as described in claim 9.

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