Battery cell, battery and electric device

Abstract

The present application relates to the technical field of batteries, and relates to a battery cell, a battery and an electric device. The battery cell comprises a cell core, a casing, a top cover, a terminal post, and an insulating member, wherein a tab is provided at one end of the cell core; an opening is provided on at least one side of the housing, and an accommodating cavity is formed for accommodating the cell core; the top cover is configured to seal the opening of the casing; a part of the terminal post passes through the top cover, and the terminal post is connected to the tab; the insulating member is arranged on the side of the top cover facing the cell core; a first protrusion is provided on the side of the insulating member facing the cell core; the first protrusion abuts against the cell core, and the first protrusion and the tab are arranged opposite to each other in a first direction; and the tab is bent on one side of the cell core, and the first protrusion is arranged on the other side of the cell core.

Description

Single-cell batteries, batteries and electrical equipment

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202422752799.1, filed on November 12, 2024, entitled "Single Battery, Battery and Electrical Device", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, specifically to a single cell battery, a battery, and an electrical device. Background Technology

[0004] In the battery industry, to optimize internal space utilization, single-cell batteries with only one cell have emerged. In a single-cell battery, the cell has only one bent tab. After this tab connects to the adapter (or terminal post), it supports the top cover on that side. However, the other side of the top cover lacks support, leaving a portion of the top cover suspended and prone to tilting towards the suspended side. During the subsequent assembly of the single-cell battery into the casing, the tilted top cover can easily damage both the casing and the cell, affecting assembly efficiency and welding yield. Summary of the Invention

[0005] 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.

[0006] In a first aspect, a single-cell battery is provided, comprising:

[0007] The battery cell has a tab at one end;

[0008] The housing has an opening on at least one side and forms a receiving cavity for accommodating the battery cell;

[0009] Top cover, used to seal the opening of the housing;

[0010] The pole has a portion that passes through the top cover and is connected to the tab.

[0011] 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.

[0012] The first direction represents the width direction of the battery cell.

[0013] In some embodiments, the surface of the insulating member facing away from the battery cell is provided with a groove, and the surface of the insulating member facing the battery cell is correspondingly protruded to form a first protrusion.

[0014] In some embodiments, 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.

[0015] In some embodiments, the first protrusion is a solid or hollow first protrusion.

[0016] In some embodiments, the number of 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.

[0017] In some embodiments, the insulating element includes:

[0018] The first insulating component is connected to the side of the top cover facing the battery cell;

[0019] The second insulating member has one end rotatably connected to the first insulating member. The second insulating member is used to form a receiving cavity with the first insulating member when rotated to a position below the first insulating member. The electrode lug and the electrode post are disposed within the receiving cavity.

[0020] The first protrusion is located on the side of the second insulating member facing the battery cell.

[0021] In some embodiments, the second insulating member has a second protrusion on one side surface facing the receiving cavity, and the second protrusion abuts against at least one of the pole and the first insulating member.

[0022] In some embodiments, the second protrusion is a solid or hollow second protrusion that abuts against at least one of the pole post and the first insulating member.

[0023] In some embodiments, the number of 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.

[0024] In some embodiments, the insulating member is provided with a groove that protrudes toward the battery cell to form a first protrusion.

[0025] The insulating component has a second protrusion on the side opposite to the battery cell. The second protrusion is a ridge that extends along the edge of the groove.

[0026] In some embodiments, the insulating member is provided with a groove that protrudes away from the battery cell to form a second protrusion.

[0027] The first protrusion is a raised strip that extends along the edge of the groove.

[0028] In some embodiments, the insulating element includes:

[0029] The first insulating component is connected to the side of the top cover facing the battery cell;

[0030] The second insulating member has one end rotatably connected to the first insulating member. The second insulating member is used to form a receiving cavity with the first insulating member when rotated to a position below the first insulating member. The electrode lug and the electrode post are disposed within the receiving cavity.

[0031] The first protrusion is located on the side of the second insulating member facing the battery cell.

[0032] Secondly, a battery is also provided, comprising:

[0033] The single-cell battery as described in the previous embodiment.

[0034] Thirdly, an electrical appliance is also provided, including:

[0035] The battery as described in the previous embodiment or the single cell battery as described in the previous embodiment.

[0036] 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 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 the battery cell being installed into the housing, thus ensuring the efficiency of housing installation. Attached Figure Description

[0037] 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.

[0038] Figure 1 is a schematic diagram of the structure of a single battery provided in an exemplary embodiment of this application (the casing is omitted).

[0039] Figure 2 is a structural schematic diagram of an insulating member provided in an exemplary embodiment of this application from a first-view perspective.

[0040] Figure 3 is a structural schematic diagram of an insulating member provided in an exemplary embodiment of this application from a second perspective.

[0041] Figure 4 is a schematic diagram of the insulating member provided in an exemplary embodiment of this application from a third-person perspective.

[0042] Figure 5 is a structural schematic diagram of an insulating member provided in another exemplary embodiment of this application from a first-view perspective.

[0043] Figure 6 is a structural schematic diagram of an insulating member provided in another exemplary embodiment of this application from a second perspective.

[0044] Figure 7 is a structural schematic diagram of an insulating member provided in another exemplary embodiment of this application from a first-view perspective.

[0045] Figure 8 is a structural schematic diagram of an insulating member provided in another exemplary embodiment of this application from a second perspective.

[0046] Figure 9 is a schematic diagram of the structure of an insulating member provided in another exemplary embodiment of this application.

[0047] Figure 10 is a schematic diagram of the structure of the top cover, the first insulating member, and the second insulating member provided in an exemplary embodiment of this application.

[0048] Figure 11 is a partial cross-sectional view of a single cell provided in another exemplary embodiment of this application.

[0049] Figure 12 is a structural schematic diagram of an insulating member provided in another exemplary embodiment of this application from a first-view perspective.

[0050] Figure 13 is a structural schematic diagram of an insulating member provided in another exemplary embodiment of this application from a second perspective.

[0051] Figure 14 is a structural schematic diagram of an insulating member provided in another exemplary embodiment of this application from a first-view perspective.

[0052] Figure 15 is a structural schematic diagram of an insulating member provided in another exemplary embodiment of this application from a second perspective.

[0053] Figure 16 is a structural schematic diagram of an insulating member provided in another exemplary embodiment of this application from a first-view perspective.

[0054] Figure 17 is a structural schematic diagram of an insulating member provided in another exemplary embodiment of this application from a second perspective.

[0055] Figure 18 is a partial cross-sectional view of a single cell provided in another exemplary embodiment of this application.

[0056] Figure 19 is a perspective view of a single battery provided in an exemplary embodiment of this application.

[0057] Figure 20 is an explosion diagram of a battery provided in an exemplary embodiment of this application.

[0058] Figure 21 is a schematic diagram of the structure of a vehicle provided in an exemplary embodiment of this application.

[0059] Reference numerals: 100, single cell; 110, cell; 111, tab; 120, top cover; 130, insulating component; 131, first protrusion; 132, groove; 133, first protrusion; 134, first insulating component; 135, second insulating component; 136, receiving cavity; 137, terminal post; 138, adapter piece; 139, second protrusion; 140, second protrusion; 141, ridge; 150, casing; 900, battery; 1000, vehicle. Detailed Implementation

[0060] 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.

[0061] As shown in Figures 1, 2, and 19, the single-cell battery 100 provided in this application embodiment may include a cell 110, a housing 150, a top cover 120, and an insulating member 130. The housing 150 has an opening on one side to form a receiving cavity, and 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 housing 150. 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 has a first protrusion 131, which abuts against the cell 110.

[0062] 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 150 and the cell 110 during the process of the cell 110 being installed into the housing 150, thus ensuring the efficiency of housing installation.

[0063] It should be noted that the "first direction" involved in the embodiments of this application can be understood as the width direction of the cell 110, such as the direction indicated by arrows C and D in Figure 1.

[0064] As shown in Figures 2 and 3, in one embodiment, the insulating member 130 has a groove 132 on the surface facing away from the battery cell 110, and a first protrusion 131 is formed on the surface facing the battery cell 110. 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.

[0065] 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.

[0066] In one embodiment, the number of grooves 132 is one, two, three, etc.

[0067] As shown in Figure 4, the width of the first protrusion 131 along the first direction (e.g., the direction indicated by arrows C and D in Figure 4) 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.

[0068] As shown in Figures 5 and 6, the first protrusion 131 is a solid or hollow first protrusion 133. Compared with the hollow first protrusion 133, the solid first protrusion 133 has greater structural strength, is less prone to deformation, and helps to extend the service life of the insulating component 130.

[0069] As shown in Figures 7 and 8, in one embodiment, the first protrusion 131 is a hollow first protrusion 133. Compared to a solid first protrusion 133, the hollow first protrusion 133 is lighter, thereby reducing the overall weight of the insulating component 130 and facilitating the transfer and assembly of the insulating component 130.

[0070] As shown in Figure 9, there are multiple first protrusions 133, which are spaced apart 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.

[0071] It should be noted that the "second direction" involved in the embodiments of this application can be understood as the length direction of the cell 110, such as the direction indicated by arrows E and F in Figure 9.

[0072] 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 supporting force to the top cover 120, making the top cover 120 more evenly stressed, improving the assembly stability of the top cover 120, and preventing the top cover 120 from tilting.

[0073] As shown in Figures 10, 11, and 19, 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.

[0074] 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.

[0075] As shown in Figures 10 and 11, the second insulating member 135 has a second protrusion 139 on the side facing the receiving cavity 136. The second protrusion 139 abuts against at least one of the electrode 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. The side of the second insulating member 135 facing the receiving cavity 136 is also the side of the second insulating member 135 away from the battery cell 110.

[0076] 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 height 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 cell 100 in the height direction.

[0077] In one embodiment, as shown in FIG11, the pole post 137 is connected to the adapter piece 138, and 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] As shown in Figures 12 and 13, the second protrusion 139 is a solid or hollow second protrusion 140. Compared with the hollow second protrusion 140, the solid second protrusion 140 has greater structural strength, is less prone to deformation, and helps to extend the service life of the second insulating component 135.

[0082] In one embodiment, the second protrusion 139 is a hollow second protrusion 140. 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.

[0083] As shown in Figures 14 and 15, there are multiple second protrusions 140, which are distributed at intervals along a second direction (e.g., the direction indicated by arrows E and F in Figure 14). In this way, firstly, multiple second protrusions 140 can all 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 is beneficial to improving support stability; secondly, multiple spaced second protrusions 140 are lighter than a single second protrusion 140 of the same overall length, which can save manufacturing costs.

[0084] In one embodiment, the insulating member 130 is provided with a groove 132, which protrudes towards the battery cell 110 to form a first protrusion 131; the insulating member 130 also protrudes towards the receiving cavity 136 to form a second protrusion 139, that is, the insulating member 130 protrudes away from the battery cell 110 to form the second protrusion 139. The second protrusion 139 is a ridge 141, which extends along the edge of the groove 132. In this case, the relevant technical effects of the second protrusion 139 can be referred to the rest of the text, and will not be repeated here.

[0085] When the insulating member 130 includes a first insulating member 134 and a second insulating member 135, as shown in Figures 11, 16, and 17, the surface of the second insulating member 135 facing away from the battery cell 110 has a groove 132, and the surface of the second insulating member 135 facing the battery cell 110 has a corresponding protrusion forming a first protrusion 131. Furthermore, the side of the second insulating member 135 facing the receiving cavity 136 has a protrusion forming a ridge 141, which extends along the edge of the groove 132 to form a second protrusion 139. That is, the sidewall of the groove 132 extends in the direction away from the battery cell 110 to form the ridge 141, and the ridge 141 surrounds the edge of the groove 132. In this way, firstly, by using the second insulating member 135 to protrude from the side surface facing the cell 110 to form the first protrusion 131, it is not necessary to add an additional protrusion, thus avoiding increasing the weight of the second insulating member 135; secondly, by using the ridge 141 to extend along the edge of the groove 132 to form the second protrusion 139, compared with the second protrusion 139 formed by the second protrusion 140, the ridge 141 uses less material and occupies less space in the receiving cavity 136.

[0086] In one embodiment, the insulating member 130 is provided with a groove 132, which protrudes toward the receiving cavity 136, that is, the groove 132 protrudes away from the battery cell 110 to form a second protrusion 139; the first protrusion 131 is a ridge 141, which extends along the edge of the groove 132.

[0087] When the insulating member 130 includes a first insulating member 134 and a second insulating member 135, as shown in FIG18, in one embodiment, the second insulating member 135 may have a groove 132 on the side surface facing the battery cell 110, and a second protrusion 139 correspondingly protruding on the side surface facing away from the battery cell 110; a protruding strip 141 is formed on the side of the second insulating member 135 facing the battery cell 110, and the protruding strip 141 extends along the groove edge of the groove 132 to form a first protrusion 131.

[0088] As shown in Figure 20, this application embodiment also provides a battery 900, including the single-cell battery 100 as described in the previous embodiment, 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.

[0089] This application also provides an electrical device that includes the battery described in the foregoing embodiments and has all the functions of the battery. The beneficial effects of this electrical device can be referenced to the beneficial effects of the foregoing battery. Alternatively, the electrical device includes a single battery cell described in the foregoing embodiments and has all the functions of the single battery cell. The beneficial effects of this electrical device can be referenced to the beneficial effects of the foregoing single battery cell. In one embodiment, as shown in FIG21, the electrical device is a vehicle 1000.

[0090] In one embodiment, the aforementioned single battery 100 may be a lithium-ion single battery, a sodium-ion single battery, or a magnesium-ion single battery, and its external contour may be cylindrical, flat, cuboid, or other shapes, but is not limited thereto.

[0091] In one embodiment, the battery 900 can be a battery pack or a battery module. When the battery 900 is a battery pack, the battery pack specifically includes a battery management system (BMS) and multiple individual battery cells 100. The multiple individual battery cells 100 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 individual battery cell 100. Alternatively, the multiple individual battery cells 100 can first be connected in series and / or parallel, and then connected with a module management system to form a battery module. The multiple 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.

[0092] In one embodiment, the aforementioned electrical device includes the aforementioned battery 900, and is capable of being powered by the battery 900. 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.

[0093] 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.

[0094] The block diagrams of devices, apparatuses, and devices 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, and devices 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.

[0095] It should also be noted that the components in the apparatus and equipment of this application can be disassembled and / or reassembled. These disassemblies and / or reassemblies should be considered as equivalent solutions of this application.

[0096] 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.

[0097] 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); A housing (150) having an opening on at least one side and forming a receiving cavity for accommodating the battery cell (110); A top cover (120) is used to seal the opening of the housing (150); 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 member (130) has a groove (132) on the side surface away from the battery cell (110), and the insulating member (130) protrudes to form the first protrusion (131) on the side surface facing the battery cell (110).

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 first protrusion (131) is a solid or hollow first protrusion (133).

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 first protrusion (131) is located on the side of the second insulating member (135) 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 7, characterized in that, The second protrusion (139) is a solid or hollow second protrusion (140), and the second protrusion (139) 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 1, characterized in that, The insulating component (130) is provided with a groove (132), the groove (132) protrudes toward the battery cell (110) to form the first protrusion (131); The insulating member (130) has a second protrusion (139) protruding from the side opposite to the battery cell (110). The second protrusion (139) is a ridge (141) that extends along the edge of the groove (132).

11. The single-cell battery according to claim 1, characterized in that, The insulating component (130) is provided with a groove (132), the groove (132) protrudes away from the battery cell (110) to form a second protrusion (139); The first protrusion (131) is a ridge (141) that extends along the edge of the groove (132).

12. The single-cell battery according to claim 10 or 11, 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 first protrusion (131) is located on the side of the second insulating member (135) facing the battery cell (110).

13. A battery, characterized in that, include: The single-cell battery as described in any one of claims 1 to 12.

14. An electrical appliance, characterized in that, include: The battery as claimed in claim 13, or the single cell battery as claimed in any one of claims 1 to 12.

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