Single battery, battery and electric equipment

Abstract

The utility model relates to a single battery, a battery and electric equipment, and relates to the technical field of batteries, the single battery comprises a battery cell, a shell, a top cover, a pole and an insulating part, one end of the battery cell is provided with a pole lug, at least one side of the shell is provided with an opening, a containing cavity is formed for containing the battery cell, the top cover is used for sealing the opening of the shell, and the pole lug is arranged on the top cover. A part of the pole penetrates through the top cover, the pole is connected with the tab, the insulating part is arranged on one side, facing the battery cell, of the top cover, a first protruding part is arranged on one side, facing the battery cell, of the insulating part, the first protruding part abuts against the battery cell, the first protruding part and the tab are oppositely arranged in the first direction, the tab is bent on one side of the battery cell, and the second protruding part is arranged on the other side of the battery cell. And the first lug boss is arranged on the other side of the battery cell.

Description

Technical Field

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

[0002] In the battery industry, to optimize internal space utilization, single-core batteries with only one winding core have emerged. In a single-core battery, the cell has a bent tab on only one side. After this tab connects to the adapter (or terminal post), the bent tab supports the top cover on that side. However, there is no support between the other side of the top cover and the cell, leaving a portion of the top cover suspended in mid-air. This can easily cause the top cover to tilt towards the suspended side. During the subsequent pressing of the single-core battery into the casing, the tilted top cover can easily damage both the casing and the cell, affecting casing insertion efficiency and welding yield. Utility Model Content

[0003] To address the aforementioned technical problems, embodiments of this application provide a single-cell battery, a battery, and an electrical device that can support the side of the top cover that is suspended, preventing the top cover from tilting, preventing the top cover from damaging the casing and the battery cell, and ensuring efficient casing installation.

[0004] In a first aspect, a single-cell battery is provided, comprising:

[0005] A battery cell, wherein one end of the battery cell is provided with a tab;

[0006] The housing has an opening on at least one side and forms a receiving cavity for accommodating the battery cell;

[0007] A top cover for sealing the opening of the housing;

[0008] A pole post, a portion of which passes through the top cover and is connected to the tab;

[0009] An insulating component is provided on the side of the top cover facing the battery cell. The side of the insulating component facing the battery cell has a first protrusion. The first protrusion abuts against the battery cell, and the first protrusion and the electrode are arranged opposite to each other along a first direction. The electrode is bent on one side of the battery cell, and the first protrusion is provided on the other side of the battery cell.

[0010] The first direction represents the width direction of the battery cell.

[0011] According to a first aspect of this application, the insulating member is recessed with a groove, the groove protruding toward the battery cell to form the first protrusion.

[0012] According to a first aspect of this application, the width of the first protrusion along the first direction is A, and the width of the insulating member along the first direction is B, wherein A and B satisfy: A≤0.5B.

[0013] According to a first aspect of this application, the insulating member has a solid or hollow first protrusion protruding on the side facing the battery cell to form the first protrusion.

[0014] According to a first aspect of this application, the number of the first bumps is multiple, and the multiple first bumps are distributed at intervals along a second direction; wherein the second direction represents the length direction of the battery cell.

[0015] According to a first aspect of this application, the insulating element comprises:

[0016] The first insulating element is connected to the side of the top cover facing the battery cell;

[0017] A second insulating member, one end of which is rotatably connected to the first insulating member, is used to form a receiving cavity between itself and the first insulating member when rotated to a position below the first insulating member; wherein the tab and the pole are disposed within the receiving cavity;

[0018] The second insulating member has the first protrusion on the side facing the battery cell.

[0019] According to a first aspect of this application, the second insulating member has a second protrusion on the side facing the receiving cavity, and the second protrusion abuts against at least one of the pole and the first insulating member.

[0020] According to a first aspect of this application, the second insulating member has a solid or hollow second protrusion protruding on one side facing the receiving cavity to form a second protrusion, the second protrusion abutting against at least one of the pole post and the first insulating member.

[0021] According to a first aspect of this application, the number of the second bumps is multiple, and the multiple second bumps are spaced apart along a second direction; wherein the second direction represents the length direction of the battery cell.

[0022] According to a first aspect of this application, the second insulating member is recessed with a groove, the groove protruding toward the battery cell to form the first protrusion;

[0023] The second insulating member has a protruding ridge on the side facing the receiving cavity, the ridge extending along the edge of the groove to form the second protrusion; or,

[0024] The second insulating member has a recessed groove, which protrudes toward the receiving cavity to form the second protrusion.

[0025] The second insulating member has a raised strip protruding on the side facing the battery cell, and the raised strip extends along the edge of the groove to form the first protrusion.

[0026] Secondly, a battery is also provided, comprising:

[0027] The single-cell battery as described in the previous embodiment.

[0028] Thirdly, an electrical appliance is also provided, including:

[0029] The battery as described in the previous embodiment.

[0030] The single-cell battery, battery, and electrical device provided in this application embodiment are configured such that the first protrusion and the tab are arranged opposite each other along a first direction, and the first protrusion is located on the other side of the battery cell based on the fact that the tab is bent on one side of the battery cell. In this way, the first protrusion plays a supporting role between the top cover and the battery cell, which can prevent the side of the top cover that is not connected to the tab from being suspended in the air, thereby preventing the top cover from tilting and preventing the top cover from damaging the housing and the battery cell during the process of pressing the battery cell into the housing, thus ensuring the efficiency of housing insertion. Attached Figure Description

[0031] 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.

[0032] Figure 1 This is a schematic diagram of the structure of a single battery provided for an exemplary embodiment of this application.

[0033] Figure 2 A schematic diagram of the structure of an insulating member provided in an exemplary embodiment of this application from a first-view perspective.

[0034] Figure 3 A schematic diagram of the structure of an insulating member provided in an exemplary embodiment of this application from a second perspective.

[0035] Figure 4 A schematic diagram of the structure of an insulating member provided in an exemplary embodiment of this application from a third-person perspective.

[0036] Figure 5 A schematic diagram of the structure of an insulating member provided in a first view, for another exemplary embodiment of this application.

[0037] Figure 6A schematic diagram of the structure of an insulating member provided in another exemplary embodiment of this application from a second perspective.

[0038] Figure 7 A schematic diagram of the structure of an insulating member provided in a first view, for another exemplary embodiment of this application.

[0039] Figure 8 A schematic diagram of the structure of an insulating member provided in another exemplary embodiment of this application from a second perspective.

[0040] Figure 9 A schematic diagram of the structure of an insulating element provided for another exemplary embodiment of this application.

[0041] Figure 10 A schematic diagram of the structure of the top cover, the first insulating member, and the second insulating member provided for an exemplary embodiment of this application.

[0042] Figure 11 A partial cross-sectional view of a single battery cell provided for another exemplary embodiment of this application.

[0043] Figure 12 A schematic diagram of the structure of an insulating member provided in a first view, for another exemplary embodiment of this application.

[0044] Figure 13 A schematic diagram of the structure of an insulating member provided in another exemplary embodiment of this application from a second perspective.

[0045] Figure 14 A schematic diagram of the structure of an insulating member provided in a first view, for another exemplary embodiment of this application.

[0046] Figure 15 A schematic diagram of the structure of an insulating member provided in another exemplary embodiment of this application from a second perspective.

[0047] Figure 16 A schematic diagram of the structure of an insulating member provided in a first view, for another exemplary embodiment of this application.

[0048] Figure 17 A schematic diagram of the structure of an insulating member provided in another exemplary embodiment of this application from a second perspective.

[0049] Reference numerals: 100-Single cell; 110-Cell; 111-Taper; 120-Top cover; 130-Insulator; 131-First protrusion; 132-Groove; 133-First protrusion; 134-First insulator; 135-Second insulator; 136-Receiving cavity; 137-Terminal post; 138-Adapter piece; 139-Second protrusion; 140-Second protrusion; 141-Raised strip. Detailed Implementation

[0050] 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.

[0051] Figure 1 This is a schematic diagram of the structure of a single battery provided for an exemplary embodiment of this application. Figure 2 This is a schematic diagram of the structure of an insulating member provided in an exemplary embodiment of this application from a first-view perspective. Figure 1 and Figure 2 As shown, the single battery 100 provided in this application embodiment may include a cell 110, a casing, a top cover 120, and an insulating member 130. An opening is provided on one side of the casing to form a receiving cavity. The cell 110 is located in the receiving cavity. One end of the cell 110 is provided with a tab 111. The top cover 120 is located above the cell 110 and seals the opening of the casing. The insulating member 130 is located on the side of the top cover 120 facing the cell 110. The side of the insulating member 130 facing the cell 110 is provided with a first protrusion 131, which abuts against the cell 110.

[0052] It should be noted that the first protrusion 131 and the tab 111 are arranged opposite to each other along the first direction. The tab 111 is bent on one side of the cell 110, while the first protrusion 131 is located on the other side of the cell 110. In this way, the first protrusion 131 plays a supporting role between the top cover 120 and the cell 110, which can prevent the side of the top cover 120 that is not connected to the tab 111 from being suspended in the air, thereby preventing the top cover 120 from tilting and preventing the top cover 120 from damaging the housing and the cell 110 during the process of pressing the cell 110 into the housing, thus ensuring the efficiency of housing insertion.

[0053] It should be noted that the "first direction" involved in the embodiments of this application can be understood as the width direction of the battery cell 110, for example... Figure 1 The directions indicated by the middle arrows C and D.

[0054] Figure 3 This is a schematic diagram of the insulating member provided in an exemplary embodiment of this application from a second perspective. (See diagram below.) Figure 2 and Figure 3 As shown, in one embodiment, the insulating member 130 is recessed with a groove 132, which protrudes towards the battery cell 110, forming a first protrusion 131. In this way, the aforementioned support function for the side of the top cover 120 not connected to the tab 111 can be achieved without increasing the weight of the insulating member 130, which is beneficial to saving production costs.

[0055] It should be noted that the depth of the groove 132 can be set according to the distance between the top cover 120 and the battery cell 110. In this embodiment of the application, the depth of the groove 132 is not specifically limited.

[0056] In one embodiment, the number of grooves 132 is one, two, three, etc.

[0057] Figure 4 This is a schematic diagram of the insulating member provided in an exemplary embodiment of this application from a third-person perspective. Figure 4 As shown, the first protrusion 131 is along a first direction (e.g., Figure 4 The width of the first groove 132 (in the direction indicated by arrows C and D) is A, and the width of the insulating member 130 along the first direction is B. If the ratio of width A to width B is too large, the first groove 132 will occupy too much of the width of the insulating member 130, affecting the overall strength of the insulating member 130. Therefore, in this embodiment, the widths A and B satisfy the following condition: A ≤ 0.5B. In this way, while ensuring that the first protrusion 131 has the aforementioned supporting function, the overall strength of the insulating member 130 can also be effectively guaranteed, reducing the probability of the insulating member 130 breaking.

[0058] Figure 5 A schematic diagram of the structure of an insulating member provided in a first view, for another exemplary embodiment of this application. Figure 6 A schematic diagram of the insulating member provided in another exemplary embodiment of this application from a second perspective. (See diagram below.) Figure 5 and Figure 6 As shown, the insulating member 130 has a solid first protrusion 133 protruding on the side facing the battery cell 110 to form a first protrusion 131. Compared with the hollow first protrusion 133, the solid first protrusion 133 has greater structural strength and is less prone to deformation, which helps to extend the service life of the insulating member 130.

[0059] Figure 7 A schematic diagram of the structure of an insulating member provided in a first view, for another exemplary embodiment of this application. Figure 8 A schematic diagram of the insulating member provided in another exemplary embodiment of this application from a second perspective. (See diagram below.) Figure 7 and Figure 8 As shown, in one embodiment, the insulating member 130 has a hollow first protrusion 133 protruding on the side facing the battery cell 110 to form a first protrusion 131. Compared to a solid first protrusion 133, the hollow first protrusion 133 is lighter, thereby reducing the overall weight of the insulating member 130 and facilitating the transfer and assembly of the insulating member 130.

[0060] Figure 9 A schematic diagram of the structure of an insulating member provided for another exemplary embodiment of this application. (See diagram below.) Figure 9As shown, there are multiple first protrusions 133, which are distributed at intervals along the second direction. In this way, firstly, each of the multiple first protrusions 133 can support the side of the top cover 120 that is not connected to the tab 111, and the multiple first protrusions 133 can support different parts, which is beneficial to improving the support stability; secondly, the multiple spaced first protrusions 133 are lighter than a single first protrusion 133 of the same length, which can save manufacturing costs.

[0061] It should be noted that the "second direction" involved in the embodiments of this application can be understood as the length direction of the battery cell 110, for example... Figure 9 The directions indicated by the middle arrows E and F.

[0062] In one embodiment, the spacing between any two adjacent first protrusions 133 in the second direction is equal. In this way, the multiple first protrusions 133 can apply a more uniform supporting force to the top cover 120, improve the assembly stability of the top cover 120, and prevent the top cover 120 from tilting.

[0063] Figure 10 A schematic diagram of the structure of the top cover, the first insulating member, and the second insulating member provided for an exemplary embodiment of this application. Figure 11 A partial cross-sectional view of a single battery cell provided for another exemplary embodiment of this application. (See attached image.) Figure 10 and Figure 11 As shown, the single-cell battery 100 may further include a terminal post 137, a portion of which passes through the top cover 120 and is connected to a tab 111. The terminal post 137 can be used to connect to an external electrical appliance. Correspondingly, the insulating member 130 may further include a first insulating member 134 and a second insulating member 135. The first insulating member 134 is connected to the side of the top cover 120 facing the cell 110. One end of the second insulating member 135 is rotatably connected to the first insulating member 134. When the second insulating member 135 is rotated below the first insulating member 134, it forms a receiving cavity 136 with the first insulating member 134, and at least a portion of the tab 111 and a portion of the terminal post 137 are located within the receiving cavity 136. In this way, firstly, the first insulating member 134 and the second insulating member 135 can protect the tab 111 and the terminal 137, and can isolate the cell 110 from the tab 111 and the terminal 137, thus avoiding internal contact short circuits; secondly, the space between the first insulating member 134 and the second insulating member 135 (i.e., the receiving cavity 136) can be fully utilized, thereby improving the space utilization rate of the single cell 100 in the height direction.

[0064] It should be noted that, in the case of the presence of the first insulating member 134 and the second insulating member 135, the aforementioned first protrusion 131 is disposed on the side of the second insulating member 135 facing the battery cell 110, so as to play the aforementioned supporting role.

[0065] like Figure 10 and Figure 11 As shown, the second insulating member 135 has a second protrusion 139 on the side facing the receiving cavity 136, and the second protrusion 139 abuts against at least one of the pole post 137 and the first insulating member 134. In this way, the first protrusion 131 and the second protrusion 139 can work together to provide support and prevent the top cover 120 from tilting.

[0066] It should be noted that, with the distance between the top cover 120 and the cell 110 remaining unchanged, the introduction of the second protrusion 139 can shorten the length of the first protrusion 131. The second protrusion 139 can make full use of the space in the receiving cavity 136, which can effectively improve the space utilization rate of the single battery 100 in the height direction.

[0067] In one embodiment, such as Figure 11 As shown, the pole post 137 is connected to the adapter piece 138. The second protrusion 139 abuts against the adapter piece 138, thereby abutting against the pole post 137 and providing support for the top cover 120.

[0068] In one embodiment, the pole post 137 is not connected to the adapter piece 138, and the second protrusion 139 can directly abut against the pole post 137 to support the top cover 120.

[0069] In one embodiment, the second protrusion 139 may abut against one of the pole post 137 (including direct abutment against the pole post 137 and indirect abutment against the pole post 137 via the adapter piece 138) and the first insulating member 134, or the second protrusion 139 may abut against both the pole post 137 (including direct abutment against the pole post 137 and indirect abutment against the pole post 137 via the adapter piece 138) and the first insulating member 134 simultaneously.

[0070] In one embodiment, the first protrusion 131 and the second protrusion 139 can be integrally formed, which can improve the strength between the first protrusion 131 and the second protrusion 139, and also facilitate the production and manufacturing of the insulating component 130.

[0071] Figure 12 A schematic diagram of the structure of an insulating member provided in a first view, for another exemplary embodiment of this application. Figure 13 A schematic diagram of the insulating member provided in another exemplary embodiment of this application from a second perspective. (See diagram below.) Figure 12 and Figure 13As shown, a solid second protrusion 140 protrudes from the side of the second insulating member 135 facing the receiving cavity 136 to form the aforementioned second protrusion 139. Compared to a hollow second protrusion 140, the solid second protrusion 140 has greater structural strength and is less prone to deformation, which helps to extend the service life of the second insulating member 135.

[0072] In one embodiment, the second insulating member 135 may also have a hollow second protrusion 140 protruding on the side facing the receiving cavity 136 to form the aforementioned second protrusion 139. Compared to a solid second protrusion 140, the hollow second protrusion 140 is lighter, which can reduce the overall weight of the second insulating member 135 and facilitate the transfer and assembly of the second insulating member 135.

[0073] Figure 14 A schematic diagram of the structure of an insulating member provided in a first view, for another exemplary embodiment of this application. Figure 15 A schematic diagram of the insulating member provided in another exemplary embodiment of this application from a second perspective. (See diagram below.) Figure 14 and Figure 15 As shown, there are multiple second protrusions 140, and the multiple second protrusions 140 are along a second direction (e.g., Figure 14 The second protrusions 140 are spaced apart (in the directions indicated by the arrows E and F). In this way, firstly, multiple second protrusions 140 can support the side of the top cover 120 that is not connected to the tab 111, and multiple second protrusions 140 can support different parts, which helps to improve the stability of the support. Secondly, multiple spaced second protrusions 140 are lighter than a single second protrusion 140 of the same length, which can save manufacturing costs.

[0074] Figure 16 A schematic diagram of the structure of an insulating member provided in a first view, for another exemplary embodiment of this application. Figure 17 A schematic diagram of the insulating member provided in another exemplary embodiment of this application from a second perspective. (See diagram below.) Figure 16 and Figure 17 As shown, the second insulating member 135 has a recessed groove 132, which protrudes towards the battery cell 110 to form a first protrusion 131. The second insulating member 135 also has a protruding rib 141 on one side facing the receiving cavity 136, extending along the edge of the groove 132 to form a second protrusion 139. Thus, firstly, by using the portion of the groove 132 protruding towards the battery cell 110 to form the first protrusion 131, it is possible to avoid adding an additional protrusion and thus reducing the weight of the second insulating member 135. Secondly, by using the rib 141 extending along the edge of the groove 132 to form the second protrusion 139, compared to the second protrusion 139 formed by the second protrusion 140, the rib 141 uses less material and occupies less space in the receiving cavity 136.

[0075] In one embodiment, the second insulating member 135 may be recessed with a groove 132, the groove 132 protruding toward the receiving cavity 136 to form a second protrusion 139; the second insulating member 135 may be provided with a protruding strip 141 on the side toward the battery cell 110, the protruding strip 141 extending along the edge of the groove 132 to form a first protrusion 131.

[0076] This application also provides a battery, including the single-cell battery 100 as described in the previous embodiments, and possessing all the functions of the single-cell battery 100. The beneficial effects of this battery can be referred to the beneficial effects of the aforementioned single-cell battery 100.

[0077] This application also provides an electrical device that includes the battery described in the foregoing embodiments and possesses all the functions of the battery. The beneficial effects of this electrical device can be referenced in relation to the beneficial effects of the aforementioned battery.

[0078] 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.

[0079] 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.

[0080] In one embodiment, the aforementioned electrical device includes the aforementioned battery and is capable of being powered by the battery. The aforementioned electrical device may be a vehicle, mobile phone, portable device, laptop computer, 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. This application does not impose any special limitations on the aforementioned electrical devices.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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 single-cell battery, characterized in that, include: A battery cell (110), one end of which is provided with a tab (111); The housing has an opening on at least one side and forms a receiving cavity for accommodating the battery cell (110); Top cover (120) for sealing the opening of the housing; A pole post (137), a portion of which passes through the top cover (120), and the pole post (137) is connected to the tab (111); An insulating member (130) is provided on the side of the top cover (120) facing the battery cell (110). The insulating member (130) on the side facing the battery cell (110) has a first protrusion (131). The first protrusion (131) abuts against the battery cell (110), and the first protrusion (131) and the electrode (111) are arranged opposite to each other in a first direction. The electrode (111) is bent on one side of the battery cell (110), and the first protrusion (131) is provided on the other side of the battery cell (110). The first direction represents the width direction of the battery cell (110).

2. The single-cell battery according to claim 1, characterized in that, The insulating component (130) has a recessed groove (132) that protrudes toward the battery cell (110) to form the first protrusion (131).

3. The single-cell battery according to claim 1, characterized in that, The width of the first protrusion (131) along the first direction is A, and the width of the insulating member (130) along the first direction is B, wherein A and B satisfy: A≤0.5B.

4. The single-cell battery according to claim 1, characterized in that, The insulating member (130) has a solid or hollow first protrusion (133) protruding on the side facing the battery cell (110) to form the first protrusion (131).

5. The single-cell battery according to claim 4, characterized in that, The number of the first bumps (133) is multiple, and the multiple first bumps (133) are distributed at intervals along a second direction; wherein, the second direction represents the length direction of the battery cell (110).

6. The single-cell battery according to any one of claims 1 to 5, characterized in that, The insulating element (130) includes: The first insulating element (134) is connected to the side of the top cover (120) facing the battery cell (110); A second insulating member (135) is provided, one end of which is rotatably connected to the first insulating member (134). The second insulating member (135) is used to form a receiving cavity (136) with the first insulating member (134) when rotated to a position below the first insulating member (134). The electrode tab (111) and the electrode post (137) are disposed in the receiving cavity (136). The second insulating member (135) has the first protrusion (131) on the side facing the battery cell (110).

7. The single-cell battery according to claim 6, characterized in that, The second insulating member (135) has a second protrusion (139) on the side facing the receiving cavity (136), and the second protrusion (139) abuts against at least one of the pole post (137) and the first insulating member (134).

8. The single-cell battery according to claim 6, characterized in that, The second insulating member (135) has a solid or hollow second protrusion (140) protruding on the side facing the receiving cavity (136) to form a second protrusion (139), which abuts against at least one of the pole post (137) and the first insulating member (134).

9. The single-cell battery according to claim 8, characterized in that, The number of the second bumps (140) is multiple, and the multiple second bumps (140) are distributed at intervals along a second direction; wherein, the second direction represents the length direction of the battery cell (110).

10. The single-cell battery according to claim 9, characterized in that, The second insulating member (135) is recessed with a groove (132), and the groove (132) protrudes toward the battery cell (110) to form the first protrusion (131); The second insulating member (135) has a protruding rib (141) on the side facing the receiving cavity (136), the rib (141) extending along the edge of the groove (132) to form the second protrusion (139); or, The second insulating member (135) is recessed with a groove (132), and the groove (132) protrudes toward the receiving cavity (136) to form the second protrusion (139); The second insulating member (135) has a protruding strip (141) on the side facing the battery cell (110), and the protruding strip (141) extends along the groove edge of the groove (132) to form the first protrusion (131).

11. A battery, characterized in that, include: The single-cell battery as described in any one of claims 1 to 10.

12. An electrical appliance, characterized in that, include: The battery as claimed in claim 11.

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