Battery top cover, battery with the battery top cover and electric device

Abstract

Embodiments of the present application provide a battery top cover, a battery having the same and an electric device. The battery top cover of the embodiments of the present application comprises a top cover plate, a pole, an upper plastic and a mortise and tenon piece. The top cover plate has a pole hole, the pole is arranged on the pole hole, the upper plastic is provided with a limiting hole, a part of the pole is arranged in the limiting hole, and a part of the upper plastic is pressed on the pole; the mortise and tenon piece is arranged on the top cover plate and the upper plastic so as to realize the mortise and tenon connection of the upper plastic and the top cover plate. Therefore, the battery top cover according to the embodiments of the present application has the advantages of improving the assembly efficiency, reducing the assembly cost and improving the energy density of the battery cell.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more specifically to a battery top cover, a battery having the battery top cover, and an electrical device thereof. Background Technology

[0002] Lithium-ion batteries, as a new type of rechargeable battery, have advantages such as high energy density and power density, long cycle life, good safety, and environmental friendliness. They have broad application prospects in portable electrical appliances, power tools, large-scale energy storage, and electric transportation power supplies. Battery top covers are mostly assembled using a combination of injection molding, welding, or riveting processes.

[0003] In related technologies, the battery top cover includes a first terminal post and a second terminal post, an upper plastic, a sealing ring, a lower plastic, a fixing ring, and a top cover sheet. The fixing ring is welded onto the top cover sheet. Because there are many parts involved, the processing procedures are complex and the assembly cost is high. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a battery top cover. This battery top cover has the advantages of improving assembly efficiency, reducing assembly costs, and increasing the energy density of the battery cell.

[0005] An embodiment of the present invention also proposes a battery.

[0006] An embodiment of the present invention also proposes an electrical device.

[0007] The battery top cover of this invention includes a top cover plate, terminals, upper plastic, and tenon joints.

[0008] The top cover plate has pole holes, and the poles are laid on the pole holes; the upper plastic has a limiting hole, a part of the pole passes through the limiting hole, and a part of the upper plastic is pressed on the pole; the tenon and mortise are passed through the top cover plate and the upper plastic to realize the tenon and mortise connection between the upper plastic and the top cover plate.

[0009] In this embodiment of the invention, the battery top cover is fitted onto the top cover plate and the upper plastic via tenon joints to achieve a tenon-and-mortise connection between the upper plastic and the top cover plate. This secures the upper plastic to the terminal post, eliminating the need for welding rings to fix the upper plastic and the terminal post. Specifically, during assembly, the top cover plate is placed first, followed by the terminal post and the upper plastic. A corresponding jig is used to press them together, ensuring the upper plastic and top cover plate are coaxially aligned before inserting the tenon joint. This type of battery top cover eliminates the need for rivet blocks to fix the terminal post, reducing the space occupied by rivet blocks and allowing for a higher cell height, thus increasing the cell's energy density. Furthermore, it reduces the riveting steps between the terminal post and the rivet block, simplifying the installation process and reducing assembly costs. Therefore, it further improves the assembly efficiency of the battery top cover.

[0010] The battery top cover of this invention has the advantages of improving assembly efficiency, reducing assembly costs, and increasing the energy density of the battery cell.

[0011] In some embodiments, a limiting annular groove is defined between the upper plastic and the top cover plate, and the pole post has a limiting annular protrusion disposed within the limiting annular groove.

[0012] In some embodiments, the upper plastic is in the form of a cover, the upper plastic includes a positioning plate and a limiting ring extending from the outer periphery of the positioning plate toward covering the pole post, the positioning plate is provided with the limiting hole, the tenon is inserted through the limiting ring, the positioning plate, the limiting ring and the top cover plate define a limiting ring groove, the positioning plate is pressed onto the pole post, and one end of the limiting ring abuts against the top cover plate.

[0013] In some embodiments, the inner wall surface of the limiting ring sleeve is provided with one of an anti-rotation protrusion and an anti-rotation groove, and the limiting ring protrusion is provided with the other of the anti-rotation protrusion and the anti-rotation groove, and the anti-rotation protrusion is engaged in the anti-rotation groove.

[0014] In some embodiments, there are multiple anti-rotation protrusions and multiple anti-rotation grooves. The multiple anti-rotation protrusions are disposed at intervals along the circumference of the limiting ring sleeve on the inner wall surface of the limiting ring sleeve, and the multiple anti-rotation grooves are disposed at intervals along the circumference of the limiting ring sleeve on the edge of the limiting ring protrusion.

[0015] In some embodiments, the cross-sectional area of ​​the limiting ring increases from the positioning plate towards the top cover plate to form a trumpet shape for the limiting ring.

[0016] In some embodiments, the pole includes a pole body and a limiting ring plate extending outward along the outer peripheral wall of the pole body. The limiting ring plate is connected to the region between the two ends of the pole body in the length direction, and a portion of the upper plastic is pressed onto the limiting ring plate.

[0017] In some embodiments, the tenon and mortise are obliquely inserted through the upper plastic and the top cover plate relative to the thickness direction of the battery top cover.

[0018] In some embodiments, the tenon and mortise are provided in a plurality of manner, and the plurality of tenons and mortises are spaced apart along the circumferential direction of the pole hole and pass through the top cover plate and the upper plastic.

[0019] In some embodiments, the battery top cover further includes an insulating sealant disposed on the portion of the upper plastic through which the tenon is inserted.

[0020] In some embodiments, the top cover plate includes a top cover body and a protrusion, the protrusion protruding along the inner wall of the pole hole toward the upper plastic, the upper plastic being fitted onto the protrusion, the upper plastic being able to abut against the top cover body, and the tenon being inserted into the protrusion.

[0021] In some embodiments, the top cover plate further includes a lower plastic piece attached to the top cover body on the side away from the upper plastic piece. The lower plastic piece has a lower plastic hole and a plastic annular protrusion protruding along the inner wall surface of the lower plastic hole, the plastic annular protrusion passing through the pole hole.

[0022] In some embodiments, the battery top cover further includes a sealing ring, the sealing ring including a sealing ring body and a sealing spacer extending along the inner wall surface of the sealing ring body in the thickness direction of the battery top cover, the sealing spacer and the sealing ring body forming a limiting step at the connection, the sealing spacer being disposed on the inner wall surface of the terminal hole, and the sealing ring body abutting between the top cover plate and the terminal.

[0023] The battery of this invention includes a battery cell and a battery top cover according to any one of the above-described embodiments, wherein the battery cell is electrically connected to the terminal post.

[0024] The electrical device of this invention includes the battery described above. Attached Figure Description

[0025] Figure 1 This is a front view of the battery top cover according to an embodiment of the present invention.

[0026] Figure 2 yes Figure 1 Cross-sectional view along the AA direction.

[0027] Figure 3 This is a front view of the battery top cover according to an embodiment of the present invention.

[0028] Figure 4 This is a perspective view of the pole of an embodiment of the present invention.

[0029] Figure 5 This is a perspective view of the plastic material in an embodiment of the present invention.

[0030] Figure label:

[0031] Battery top cover 100;

[0032] Top cover plate 1; Top cover body 11; Protrusion 12; Pole post hole 13;

[0033] 2. Pole post 2; Pole post body 21; Limiting ring plate 22; Anti-rotation groove 23;

[0034] 3. Upper plastic plate; 31. Positioning plate; 32. Limiting ring; 33. Limiting hole; 34. Anti-rotation protrusion;

[0035] 4 mortise and tenon joints;

[0036] Limiting ring groove 5;

[0037] Insulating sealing component 6;

[0038] Lower plastic part 7; Lower plastic hole 71; Plastic ring protrusion 72;

[0039] 8. Sealing ring; 81. Sealing ring body; 82. Sealing spacer. Detailed Implementation

[0040] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0041] The following is for reference. Figures 1-5 This invention describes a battery top cover 100 and a battery and power device having the battery top cover 100, according to embodiments of the present invention.

[0042] The battery top cover 100 of this invention includes a top cover plate 1, a terminal post 2, an upper plastic 3, and a tenon and mortise part 4.

[0043] The top cover plate 1 has a pole hole 13, the pole 2 is laid on the pole hole 13, the upper plastic 3 is provided with a limiting hole 33, a part of the pole 2 passes through the limiting hole 33, and a part of the upper plastic 3 is pressed on the pole 2. The tenon 4 passes through the top cover plate 1 and the upper plastic 3 to realize the tenon joint between the upper plastic 3 and the top cover plate.

[0044] In this embodiment of the invention, the battery top cover 100 is secured to the terminal post 2 by pressing a portion of the upper plastic 3 onto it. A tenon 4 passes through the top cover plate 1 and the upper plastic 3 to achieve a tenon-and-mortise connection between the upper plastic 3 and the top cover plate, thus fixing the terminal post 2 with the upper plastic 3. This eliminates the need for additional welding rings to fix the upper plastic 3 and the terminal post 2, reducing the assembly cost of the battery top cover 100. Specifically, during assembly, the top cover plate 1 is placed first, followed by the terminal post 2 and the upper plastic 3. A jig is used to press them together, making the upper plastic 3 and the top cover plate 1 coaxial. The tenon 4 is then inserted. This type of battery top cover 100 eliminates the need for rivet blocks to fix the terminal post 2, reducing the space occupied by rivet blocks and allowing for a higher cell height, thus increasing the cell's energy density. Furthermore, it reduces the riveting steps between the terminal post 2 and the rivet blocks, simplifying the installation process and reducing assembly costs. Therefore, the battery top cover 100 of the present invention has the advantage of further improving the assembly efficiency of the battery top cover 100.

[0045] The battery top cover 100 of this invention has the advantages of improving assembly efficiency, reducing assembly costs, and increasing the energy density of the battery cell.

[0046] Specifically, both the upper plastic 3 and the top cover plate 1 are provided with tenon holes. The top cover plate 1 has a first surface and a second surface that are arranged opposite to each other along the thickness direction of the battery top cover 100. A part of the pole post 2 covers the pole post hole 13. The pole post 2 abuts against the first surface of the top cover plate 1. There are two pole post holes 13 on the top cover plate 1. The two pole post holes 13 correspond to the two pole posts (positive pole post and negative pole post) of the battery top cover 100. The positive pole post and the negative pole post are arranged symmetrically.

[0047] like Figure 1 and Figure 2 As shown, a limiting ring groove 5 is defined between the upper plastic 3 and the top cover plate 1, and the pole post 2 has a limiting ring protrusion (optionally, a limiting ring plate 22), which is disposed in the limiting ring groove 5.

[0048] The battery top cover 100 of this embodiment of the invention uses a limiting annular groove 5 defined between the upper plastic 3 and the top cover plate 1 to cooperate with the limiting annular protrusion on the terminal post 2. This allows the terminal post 2 to be securely fixed within the limiting annular groove 5, preventing the terminal post 2 from shaking during use and thus improving the stability of the terminal post 2 installation. Therefore, the battery top cover 100 of this embodiment of the invention has the advantage of good structural stability.

[0049] like Figure 3 and Figure 5As shown, the upper plastic 3 is in the shape of a cover. The upper plastic 3 includes a positioning plate 31 and a limiting ring 32 extending from the outer periphery of the positioning plate 31 toward the direction of covering the pole post 2. The positioning plate 31 is provided with a limiting hole 33. The tenon 4 passes through the limiting ring 32. A limiting ring groove 5 is defined between the positioning plate 31, the limiting ring 32 and the top cover plate 1. The positioning plate 31 is pressed onto the pole post 2, and one end of the limiting ring 32 abuts against the top cover plate 1.

[0050] The battery top cover 100 of this embodiment can press the terminal post 2 firmly with the positioning plate 31 to prevent the terminal post 2 from moving along the thickness direction of the battery top cover 100. Furthermore, a limiting ring 32 is used for circumferential limiting to prevent the terminal post 2 from shifting during use. Therefore, the stability of the terminal post 2 installation is further improved. Thus, the battery top cover 100 of this embodiment has the advantages of both high ease of assembly and good structural stability.

[0051] Optionally, the upper plastic 3 can be cylindrical, square, or polygonal. When it is square or polygonal, its shape can be used for positioning, which helps to improve the efficiency of the tenon 4 entering the top cover plate 1 and the upper plastic 3.

[0052] Alternatively, the tenon 4 can be a steel pin or other metal rod.

[0053] like Figures 3 to 5 As shown, the inner wall surface of the limiting ring sleeve 32 is provided with one of an anti-rotation protrusion 34 and an anti-rotation groove 23, and the limiting ring protrusion is provided with the other of the anti-rotation protrusion 34 and the anti-rotation groove 23. The anti-rotation protrusion 34 is engaged within the anti-rotation groove 23. In other words, the inner wall surface of the limiting ring sleeve 32 is provided with an anti-rotation protrusion 34, and the limiting ring protrusion is provided with an anti-rotation groove 23; or the inner wall surface of the limiting ring sleeve 32 is provided with an anti-rotation groove 23, and the limiting ring protrusion is provided with an anti-rotation protrusion 34.

[0054] In this embodiment of the invention, the battery top cover 100 features a limiting ring 32 and a limiting ring protrusion. The anti-rotation protrusion 34 and anti-rotation groove 23 work together to prevent the terminal post 2 from rotating relative to the upper plastic 3. This further enhances the structural stability of the battery top cover 100.

[0055] Furthermore, such as Figures 3 to 5 As shown, there are multiple anti-rotation protrusions 34 and anti-rotation grooves 23. Multiple anti-rotation protrusions 34 are spaced apart circumferentially on the inner wall of the limiting ring 32, and multiple anti-rotation grooves 23 are spaced apart circumferentially on the edge of the limiting ring protrusion. This further prevents the electrode post 2 from rotating relative to the upper plastic 3, thus further improving the structural stability of the battery top cover 100.

[0056] like Figure 3 and Figure 5 As shown, the cross-sectional area of ​​the limiting ring 32 increases from the positioning plate 31 toward the top cover plate 1 to form a trumpet shape for the limiting ring 32.

[0057] The battery top cover 100 of this embodiment of the invention features a flared limiting ring 32, which provides a certain degree of guidance. Therefore, the battery top cover 100 of this embodiment of the invention offers convenience for installing the upper plastic 3.

[0058] like Figure 3 and Figure 5 As shown, the pole post 2 includes a pole post body 21 and a limiting ring plate 22 extending outward along the outer peripheral wall of the pole post body 21. The limiting ring plate 22 is connected to the two ends of the pole post body 21 in the length direction, and a portion of the upper plastic 3 is pressed onto the limiting ring plate 22.

[0059] The battery top cover 100 of this embodiment of the invention divides the electrode post 2 into an electrode post body 21 and a limiting ring plate 22 extending outward along the outer peripheral wall of the electrode post body 21. Therefore, the battery top cover 100 of this embodiment of the invention has the advantages of a large contact surface and good structural stability.

[0060] like Figure 2 and Figure 3 As shown, the tenon 4 is obliquely inserted into the upper plastic 3 and the top cover plate 1 relative to the thickness direction of the battery top cover 100. Thus, the oblique insertion into the upper plastic 3 and the top cover plate 1 can take into account both the advantages of moderate insertion length and high structural stability.

[0061] like Figure 2 and Figure 3 As shown, there are multiple tenon and mortise joints 4, which are spaced apart along the circumference of the pole hole 13 and pass through the top cover plate 1 and the upper plastic 3. Thus, the battery top cover 100 of this embodiment further improves the stability of the joint between the upper plastic 3 and the top cover plate 1.

[0062] Optionally, the tenon and mortise 4 can be a steel pin and steel column structure.

[0063] Optionally, there can be eight tenon and mortise parts 4. When the upper plastic 3 and the top cover plate 1 are rectangular, two tenon and mortise parts 4 are inserted on each side of the upper plastic 3.

[0064] The battery top cover 100 of this embodiment of the invention also includes an insulating sealing member 6, which is disposed on the part of the upper plastic 3 through which the tenon and mortise member 4 passes.

[0065] The battery top cover 100 of this embodiment of the invention, through the provision of the insulating sealing member 6, can prevent the tenon and mortise member 4 from vibrating and thus prevent the tenon and mortise member 4 from coming out of the inside. Therefore, the battery top cover 100 of this embodiment of the invention has the advantage of high overall structural stability.

[0066] The insulating sealing element 6 can be an adhesive layer. Specifically, during assembly, it is dripped onto the upper plastic 3 and inserted into the hole of the tenon 4. Therefore, the battery top cover 100 of this embodiment of the invention has the advantage of high ease of assembly.

[0067] Specifically, both the upper plastic 3 and the top cover plate 1 are provided with mating holes for inserting tenon and mortise parts 4. When the mating holes on the upper plastic 3 correspond to the mating holes on the top cover plate 1, the tenon and mortise parts 4 are inserted, and the glue layer is dripped into the mating holes of the upper plastic 3 to seal the tenon and mortise parts 4 so as to fix the tenon and mortise parts 4.

[0068] like Figure 2 and Figure 3 As shown, the top cover plate 1 includes a top cover body 11 and a protrusion 12. The protrusion 12 protrudes along the inner wall of the pole hole 13 toward the direction close to the upper plastic 3. The upper plastic 3 is fitted on the protrusion 12 and can abut against the top cover body 11. The tenon 4 is inserted on the protrusion 12.

[0069] In this embodiment of the invention, the battery top cover 100, by fitting the upper plastic 3 onto the protrusion 12 of the top cover plate 1, allows the protrusion 12 to limit the upper plastic 3 and prevent it from shifting. This further improves the structural stability of the battery top cover 100.

[0070] Specifically, the limiting ring 32 is set on the protrusion 12.

[0071] Furthermore, the outer diameter of the protrusion 12 increases from the positioning plate 31 toward the top cover plate 1 in order to fit the flared limiting ring 32.

[0072] like Figure 2 and Figure 3 As shown, the top cover 1 also includes a lower plastic 7, which is attached to the top cover 11 on the side away from the upper plastic 3 (e.g., Figure 2 On the lower surface shown, the lower plastic 7 has a lower plastic hole 71 and a plastic ring protrusion 72 protruding along the inner wall surface of the lower plastic hole 71, the plastic ring protrusion 72 passing through the pole hole 13.

[0073] The battery top cover 100 of this embodiment of the invention limits the position of the lower plastic 7 by inserting the plastic ring protrusion 72 of the lower plastic 7 into the terminal hole 13, thereby improving the stability of the installation between the lower plastic 7 and the top cover body 11.

[0074] The battery top cover 100 of this embodiment of the invention also includes a sealing ring 8. The sealing ring 8 includes a sealing ring body 81 and a sealing spacer part 82 extending along the inner wall surface of the sealing ring body 81 and along the thickness direction of the battery top cover 100. The sealing spacer part 82 and the sealing ring body 81 form a limiting step at the connection. The sealing spacer part 82 is disposed on the inner wall surface of the terminal hole 13, and the sealing ring body 81 abuts between the top cover plate 1 and the terminal 2.

[0075] The battery top cover 100 of this embodiment of the invention can seal the gap between the top cover plate 1 and the terminal post 2 by means of a sealing ring 8 disposed between the top cover plate 1 and the terminal post 2, so as to ensure the sealing of the battery cell inside the battery.

[0076] Furthermore, by configuring the sealing ring 8 as a sealing ring body 81 and a sealing spacer portion 82 extending along the thickness direction of the battery end cover along the inner wall surface of the sealing ring body 81, the battery top cover 100 of this embodiment of the invention has a further improved sealing effect.

[0077] The assembly process is as follows: First, place the top cover plate 1 (e.g., a plain aluminum plate) during assembly. Then, put the sealing ring 8 on the top cover plate 1. Next, place the pole post 2 and the upper plastic 3 in sequence. Use a jig to press the upper plastic 3 so that the tenon holes on the upper plastic 3 and the plain aluminum plate correspond. At this time, insert the tenon 4 (e.g., a steel needle or other anti-bending parts). Then, place the insulating sealing part 6 (adhesive drip) in the area where the tenon 4 is set to prevent the tenon 4 from shaking. Then, ultrasonically heat-melt the lower plastic 7 to the top cover plate 1. Finally, apply the explosion-proof valve protective film.

[0078] The battery of this invention includes a battery cell and a battery top cover according to any one of the above-described embodiments, wherein the battery cell is electrically connected to the terminals. The battery of this invention has the advantages of improved assembly efficiency, reduced assembly costs, and increased energy density of the battery cell.

[0079] The electrical device of this invention includes the battery described above. The electrical device of this invention has the advantages of improved assembly efficiency, reduced assembly costs, and increased energy density of the battery cells.

[0080] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0081] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0082] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0083] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0084] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0085] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A battery top cover characterized by, The battery top cover comprises: a top cover plate having a pole hole; a pole arranged on the pole hole; an upper plastic having a limiting hole, a part of the pole is arranged in the limiting hole, and a part of the upper plastic is pressed on the pole; a mortise and tenon piece arranged on the top cover plate and the upper plastic to realize the mortise and tenon connection of the upper plastic and the top cover plate; the top cover plate comprises a top cover body and a protruding part, the protruding part protrudes along the inner wall of the pole hole towards the upper plastic, the upper plastic is sleeved on the protruding part, the upper plastic can abut against the top cover body, and the mortise and tenon piece is arranged on the protruding part.

2. The battery header of claim 1, wherein, a limiting ring groove is defined between the upper plastic and the top cover plate, and a limiting ring protrusion is arranged on the pole and arranged in the limiting ring groove.

3. The battery cup of claim 2, wherein: the upper plastic is in the shape of a cover, the upper plastic comprises a positioning plate body and a limiting ring sleeve extending from the outer periphery of the positioning plate body towards the direction of covering the pole, the limiting hole is arranged on the positioning plate body, the mortise and tenon piece is arranged on the limiting ring sleeve, the limiting ring groove is defined between the positioning plate body, the limiting ring sleeve and the top cover plate, the positioning plate body is pressed on the pole, and one end of the limiting ring sleeve abuts against the top cover plate.

4. The battery header of claim 3, wherein, one of a rotation prevention protrusion and a rotation prevention groove is arranged on the inner wall surface of the limiting ring sleeve, the other of the rotation prevention protrusion and the rotation prevention groove is arranged on the limiting ring protrusion, and the rotation prevention protrusion is clamped in the rotation prevention groove.

5. The battery header of claim 4, wherein, both the rotation prevention protrusion and the rotation prevention groove have a plurality of rotation prevention protrusions arranged on the inner wall surface of the limiting ring sleeve in a circumferential direction of the limiting ring sleeve and a plurality of rotation prevention grooves arranged on the edge of the limiting ring protrusion in the circumferential direction of the limiting ring sleeve.

6. The battery header of claim 3, wherein, the cross-sectional area of the limiting ring sleeve increases from the positioning plate body to the direction close to the top cover plate to form a horn-shaped limiting ring sleeve.

7. The battery header of claim 1, wherein, the pole comprises a pole body and a limiting ring plate extending outwardly along the outer peripheral wall of the pole body, the limiting ring plate is connected to the region between the two ends of the length direction of the pole body, and a part of the upper plastic is pressed on the limiting ring plate. and / or, the mortise and tenon piece is arranged on the upper plastic and the top cover plate in a direction inclined to the thickness direction of the battery top cover; and / or, the mortise and tenon piece has a plurality of mortise and tenon pieces arranged on the top cover plate and the upper plastic in a circumferential direction of the pole hole; and / or, the battery top cover further comprises an insulating blocking piece arranged on the part of the upper plastic where the mortise and tenon piece is arranged.

8. The battery header of claim 1, wherein, the top cover plate further comprises a lower plastic attached to the side of the top cover body away from the upper plastic, the lower plastic has a lower plastic hole and a plastic ring protrusion protruding along the inner wall surface of the lower plastic hole, and the plastic ring protrusion is arranged in the pole hole; And / or, further comprising a sealing ring, the sealing ring comprising a sealing ring body and a sealing spacer portion extending along a thickness direction of the battery top cover along an inner wall surface of the sealing ring body, the sealing spacer portion and the sealing ring body forming a limiting step at a connection, the sealing spacer portion being arranged on an inner wall surface of the pole column hole, and the sealing ring body abutting between the top cover plate and the pole column.

9. A battery, characterized by A battery comprising a battery top cover according to any one of claims 1-8 and an electric core, the electric core being electrically connected with the pole column.

10. An electrical device, characterized by A battery comprising the battery according to claim 9.

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