CN219419230U

CN219419230U - Button cell with reliable connection of upper cover assembly

Info

Publication number: CN219419230U
Application number: CN202320231992.3U
Authority: CN
Inventors: 周攀; 陈航
Original assignee: Luhua Zhifu Electronics Shenzhen Co ltd
Current assignee: Luhua Zhifu Electronics Shenzhen Co ltd
Priority date: 2023-02-02
Filing date: 2023-02-02
Publication date: 2023-07-25
Anticipated expiration: 2033-02-02

Abstract

The utility model provides a button cell with reliable connection of an upper cover component, which comprises an upper cover component and a shell, wherein the shell is cylindrical, one end of the shell is provided with an opening, the upper cover component is positioned at the opening of the shell, the upper cover component comprises hardware, a support frame and a sealing ring, the hardware, the support frame and the sealing ring are sequentially connected in a stacking manner along the axial direction of the shell, the support frame is close to an inner cavity of the shell relative to the hardware and is connected with the opening of the shell, and the shell and the upper cover component form a closed structure. The hardware is platy and is provided with first connecting hole, and the support frame is annular and is provided with the second connecting hole, is provided with outer arch and interior arch on the sealing washer, and outer arch wears to locate first connecting hole, and the hardware is connected steadily with the sealing washer, and interior arch wears to locate the second connecting hole, and the support frame is connected steadily with the sealing washer, and hardware, sealing washer and support frame are connected into this part of upper cover subassembly through protruding and the cooperation in hole, and each part in the upper cover subassembly is connected reliably, and upper cover subassembly connects reliably.

Description

Button cell with reliable connection of upper cover assembly

Technical Field

The utility model relates to the technical field of batteries, in particular to a button battery with a reliable upper cover assembly connection.

Background

The battery shell consists of a shell, an upper cover and a sealing ring, wherein the sealing ring is arranged between the outer wall of the upper cover and the inner wall of the shell, and the capacity of the whole battery shell is low, so that the requirements of different markets and customers cannot be met.

In order to solve the problems, in the prior art, a battery shell is formed by two parts of a shell and an upper cover assembly, the upper cover assembly is formed by hardware, a sealing ring and a supporting frame, the hardware, the sealing ring and the supporting frame form the upper cover assembly through post-process hot pressing, and the connection among the hardware, the sealing ring and the supporting frame after hot pressing is not reliable enough and is easy to loosen.

Disclosure of Invention

The utility model provides a button cell with a reliable connection of an upper cover assembly, which can solve the problem of unreliable connection of all parts in the upper cover assembly.

The technical scheme of the utility model is as follows: the button cell with the reliable connection of the upper cover component comprises an upper cover component and a shell, wherein the shell is cylindrical, one end of the shell is provided with an opening, the upper cover component is positioned at the opening of the shell, the upper cover component comprises hardware, a support frame and a sealing ring, the hardware, the sealing ring and the support frame are sequentially connected in a stacked manner along the axial direction of the shell, and the support frame is close to the inner cavity of the shell relative to the hardware and is connected with the opening of the shell;

the hardware is plate-shaped and is provided with a first connecting hole;

the support frame is annular and is provided with a second connecting hole;

the sealing ring is provided with an outer bulge and an inner bulge, the outer bulge is arranged in the first connecting hole in a penetrating mode, and the inner bulge is arranged in the second connecting hole in a penetrating mode.

Further, the sealing ring is formed between the hardware and the supporting frame in an in-mold injection mode, the outer bulge is formed in the first connecting hole in an injection mode, and the inner bulge is formed in the second connecting hole in an injection mode.

Further, the first connecting hole is in a frustum shape, the cross section area of the first connecting hole gradually increases towards the direction away from the inner cavity of the shell, and the outer protrusion is in a frustum shape matched with the first connecting hole.

Further, the second connecting hole is cylindrical, the axial direction of the second connecting hole is parallel to the axial direction of the shell, and the inner protrusion is cylindrical matched with the second connecting hole.

Further, the first connecting holes and the second connecting holes are all provided with a plurality of, the first connecting holes are annularly arranged on the hardware, and the second connecting holes are annularly arranged on the supporting frame.

Further, the opening edge of the shell is turned outwards to form an annular bending part, the bending part is turned inwards to form an annular limiting part far away from the direction in the shell, the limiting part is turned inwards to form an annular hook part, the bending part, the limiting part and the hook part are connected to form a U-shaped part, and the edge of the support frame and the edge of the sealing ring are both located in the U-shaped part.

Further, the outer peripheral surface of the hardware is an inclined surface, and the diameter of the outer peripheral surface of the hardware gradually increases towards the direction close to the inner cavity of the shell;

still be provided with spacing arch on the sealing washer, spacing arch is annular, spacing arch for outer protruding is close to the outer peripheral face of sealing washer, spacing bellied inner peripheral face is the inclined plane, and towards being close to the inner chamber direction of shell, spacing bellied inner peripheral face diameter reduces gradually, spacing bellied inner peripheral face with the outer peripheral face of hardware is connected.

Further, reticulation is arranged on the surface, connected with the sealing ring, of the hardware.

Further, the hardware comprises a panel and a boss, wherein the boss is columnar and is provided with a conductive end and a connecting end which are opposite to each other, the conductive end is close to the inner cavity of the shell relative to the connecting end, the panel surrounds the connecting end, and the first connecting hole is formed in the panel;

the upper cover assembly is connected with the reliable button cell and further comprises a cell, the cell is positioned in the shell, the inner edge of the sealing ring protrudes out of the inner edge of the supporting frame, and the boss penetrates through the hollow part of the sealing ring and the conducting end is connected with the cell.

Further, the battery cell is of a winding type or laminated type.

Compared with the prior art, the utility model has the beneficial effects that: the utility model provides a button cell with reliable connection of an upper cover component, which comprises an upper cover component and a shell, wherein the shell is cylindrical, one end of the shell is provided with an opening, the upper cover component is positioned at the opening of the shell, the upper cover component comprises hardware, a support frame and a sealing ring, the hardware, the sealing ring and the support frame are sequentially connected in a stacking manner along the axial direction of the shell, the support frame is close to an inner cavity of the shell relative to the hardware and is connected with the opening of the shell, and the shell and the upper cover component form a closed structure. The hardware is platy and is provided with first connecting hole, and the support frame is annular and is provided with the second connecting hole, and the sealing washer is annular, is provided with outer arch and interior arch on the sealing washer, and outer arch wears to locate first connecting hole, and interior arch wears to locate the second connecting hole. The outer bulge is connected with the first connecting hole and makes hardware and sealing washer be connected stably, and the connection of interior bulge and second connecting hole makes support frame and sealing washer be connected stably, and hardware, sealing washer and support frame are connected into this part of upper cover subassembly through the cooperation of bulge and hole, and the bulge is connected reliably with the hole, and then each part in the upper cover subassembly is connected reliably.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments are briefly described below, and the drawings in the following description are only drawings corresponding to some embodiments of the present utility model.

Fig. 1 is a schematic structural view of a button cell with reliable connection of an upper cover assembly according to a first embodiment of the present utility model.

Fig. 2 is a cross-sectional view of a button cell with reliable connection of the cap assembly of fig. 1.

Fig. 3 is an enlarged view of the structure of the portion a in fig. 2.

Fig. 4 is a schematic structural view of the upper cover assembly of fig. 1.

Fig. 5 is an exploded view of the cap assembly of fig. 1.

Fig. 6 is a schematic view illustrating another angle of the button cell with reliable connection of the upper cap assembly of fig. 1.

Fig. 7 is a structural cross-sectional view of a button cell with reliable connection of an upper cap assembly according to a second embodiment of the present utility model.

Wherein, 1, an upper cover component, 2, a shell;

11. hardware, 12, a support frame, 13, a sealing ring, 21, a bending part, 22, a limiting part, 23, a hook part, 24, a U-shaped part, 111, a first connecting hole, 112, a panel, 113, a boss, 114, a connecting end, 115, a conducting end, 121, a second connecting hole, 131, an outer bulge, 132, an inner bulge, 133, a limiting bulge, 134 and an interference bulge;

in fig. 1-5, 3, cell, 31, first tab, 32, second tab, 33, winding core;

in fig. 6, 4, a battery cell, 41, a first tab, 42, a second tab, 43, and a winding core.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The terms of directions, such as "inner", "outer" and "side", used herein are merely referring to the orientation of the drawings for the purpose of illustration and understanding of the present utility model, and are not intended to limit the present utility model.

The words "first," "second," and the like in the terminology of the present utility model are used for descriptive purposes only and are not to be construed as indicating or implying relative importance and not as limiting the order of precedence.

In the present utility model, unless explicitly specified and limited otherwise, the terms "connected," "coupled," and the like are to be construed broadly and, for example, as a fixed connection, as a removable connection, or as a unit; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1 and 2, a button cell with high structural reliability of an upper cover assembly 1 is provided in a first embodiment of the present utility model, including an upper cover assembly 1 and a housing 2, the housing 2 is cylindrical and has an opening at one end, the upper cover assembly 1 is located at the opening of the housing 2, the upper cover assembly 1 includes a hardware 11, a support frame 12 and a sealing ring 13, the hardware 11, the sealing ring 13 and the support frame 12 are sequentially stacked and connected along an axial direction of the housing 2, the support frame 12 is close to an inner cavity of the housing 2 relative to the hardware 11 and is connected with the opening of the housing 2, the housing 2 and the upper cover assembly 1 form a closed structure, and the closed structure can accommodate other components of the cell.

Referring to fig. 3, 4 and 5, the hardware 11 is plate-shaped and provided with a first connecting hole 111, the support frame 12 is ring-shaped and provided with a second connecting hole 121, the sealing ring 13 is provided with an outer protrusion 131 and an inner protrusion 132, the outer protrusion 131 is disposed through the first connecting hole 111, and the inner protrusion 132 is disposed through the second connecting hole 121. The connection of the outer bulge 131 and the first connecting hole 111 enables the hardware 11 to be connected stably with the sealing ring 13, the connection of the inner bulge 132 and the second connecting hole 121 enables the support frame 12 to be connected stably with the sealing ring 13, the hardware 11, the sealing ring 13 and the support frame 12 are connected into one part of the upper cover assembly 1 through the cooperation of the bulge and the hole, the bulge is connected reliably with the hole, and then all parts in the upper cover assembly 1 are connected reliably.

The support frame 12 is made of stainless steel, is firm and durable, has good supporting property, can reliably fix the sealing ring 13 and the hardware 11 at the opening of the shell 2, and can play a role in plastic finishing when the shell 2 is packaged.

The hardware 11 can be made of stainless steel or aluminum alloy, and the stainless steel is firm and durable, and the aluminum alloy is light in weight and low in cost. The aluminum alloy is preferably processed by CNC turning or die casting, the CNC full scale Computerised Numerical Control Machine, namely a computer numerical control machine tool, is an automatic machine tool provided with a program control system, has high processing precision, can carry out multi-coordinate linkage, has higher flexibility, high precision and high rigidity, can lighten the labor intensity, is particularly suitable for large-scale production, and reduces the cost.

The gasket 13 is preferably made of PI (Polyimide), PP (Polypropylene), or PS (Polystyrene).

The shell 2 is made of stainless steel, and the stainless steel is firm and durable.

The sealing ring 13 is formed between the hardware 11 and the supporting frame 12 by in-mold injection molding, the outer protrusion 131 is formed in the first connecting hole 111 by injection molding, and the inner protrusion 132 is formed in the second connecting hole 121 by injection molding. During manufacturing, the hardware 11 and the support frame 12 are simultaneously placed into the mold for in-mold injection, in the in-mold injection process, the injected glue flows into the first connecting hole 111 to form the outer bulge 131, flows into the second connecting hole 121 to form the inner bulge 132, and manufacturing is convenient. And the inner bulge 132, the outer bulge 131 and the sealing ring 13 are integrally formed, so that the structure is strong in reliability and tight in connection.

The first connection hole 111 has a frustum shape, and the cross-sectional area of the first connection hole 111 gradually increases toward a direction away from the inner cavity of the housing 2, and the outer protrusion 131 has a frustum shape matched with the first connection hole 111. The frustum shape of first connecting hole 111 can be filled up when the hole with sealing washer 13 formation back-off, and the inner chamber direction of keeping away from shell 2, and the cross sectional area of outer boss 131 increases gradually, and hardware 11 removes the restriction that receives outer boss 131 towards the inner chamber direction of keeping away from shell 2, prevents that hardware 11 from appearing pulling out the phenomenon, and structural reliability is strong.

In this embodiment, the shapes of the first connecting hole 111 and the outer protrusion 131 are both truncated cones, and the apex angle of the cone formed by the truncated cones is preferably 30 ° -60 °, and the first connecting hole 111 and the outer protrusion 131 in this range are suitable in size, so that the manufacturing is facilitated.

In other embodiments, the first connecting hole and the outer protrusion may also have a prismatic shape, and the two ends of the first connecting hole and the outer protrusion may have a triangular shape or other polygonal shapes, and the outer circumference of the first connecting hole and the outer protrusion may be not smooth, so as to further improve the connection tightness between the outer protrusion and the first connecting hole.

Because the outer bulge 131 is exposed through the first connecting hole 111, the exposed part of the outer bulge 131 can be designed into different shapes, or a plurality of outer bulges 131 and the first connecting holes 111 can be arranged in different arrangement modes, so that the outer bulge 131 forms patterns on the surface of the battery, the battery can be marked, and a unique visual effect is formed.

The second connecting hole 121 is cylindrical, the axial direction of the second connecting hole 121 is parallel to the axial direction of the shell 2, the inner protrusion 132 is cylindrical matched with the second connecting hole 121, the second connecting hole 121 has the function of increasing the adhesive force between the sealing ring 13 and the supporting frame 12 when the glue injection is filled, and the two ends of the second connecting hole 121 are consistent in size, so that the manufacturing is facilitated.

In other embodiments, the second connecting hole 121 may be configured as a frustum, and the cross-sectional area of the second connecting hole 121 gradually increases toward the inner cavity of the housing 2, and the inner protrusion 132 may be configured as a frustum that matches the second connecting hole 121. The cross section area of the inner bulge 132 gradually increases towards the direction close to the inner cavity of the shell 2, and the movement of the sealing ring 13 towards the direction far away from the inner cavity of the shell 2 is limited by the inner bulge 132, so that the connection tightness of the support frame 12 and the sealing ring 13 is further improved. The second connection hole 121 may have a circular truncated cone shape, and both ends thereof are rounded for convenience in manufacturing. Or the second connecting hole 121 may be prismatic, and two ends of the second connecting hole may be triangular or other polygons, so that the outer circumferential surface of the prismatic second connecting hole 121 is not smooth, and the connection tightness between the inner protrusion 132 and the second connecting hole 121 is further improved.

The first connecting holes 111 and the second connecting holes 121 are all provided with a plurality of, a plurality of first connecting holes 111 are annular on the hardware 11 and are correspondingly annular on the support frame 12, the outer bulges 131 and the inner bulges 132 are annular on the sealing ring 13, and when the bulges are connected with the holes, the everywhere on the hardware 11 can be attached to the sealing ring 13, and the everywhere on the support frame 12 can be attached to the sealing ring 13, so that insufficient tightness of the sealing ring 13 due to insufficient attachment is avoided, and battery leakage is avoided.

Referring to fig. 3, the opening edge of the housing 2 is turned outwards to form an annular bending portion 21, the bending portion 21 is turned inwards away from the housing 2 to form an annular limiting portion 22, the limiting portion 22 is turned inwards to form an annular hook portion 23, the bending portion 21, the limiting portion 22 and the hook portion 23 are connected to form a U-shaped portion 24, and the edge of the support frame 12 and the edge of the sealing ring 13 are both located in the U-shaped portion 24. The U-shaped part 24 ensures that the support frame 12 and the sealing ring 13 are firmly connected with the shell 2, and the upper cover assembly 1 is prevented from being separated from the shell 2.

In this embodiment, the bending portion 21 and the limiting portion 22 are manufactured by stamping, the bending portion 21 and the limiting portion 22 form a step structure, the bending portion 21 limits the upper cover assembly 1 in the axial direction of the housing 2, and the limiting portion 22 limits the upper cover assembly 1 in the radial direction of the housing 2, so that the upper cover assembly 1 and the housing 2 can be assembled conveniently. The hook part 23 is formed by rolling a crimping jig, and the side wall of the shell 2, the bending part 21, the limiting part 22 and the hook part 23 are integrally formed, so that the structural reliability is high.

In other embodiments, the side wall of the housing may be connected to the bending portion by welding, the limiting portion may be connected to the bending portion by welding, and the hook portion may be connected to the limiting portion by welding.

In other embodiments, the hook part is not required, only the bending part and the limiting part are provided, the peripheral edge of the support frame is connected with the bending part, the outer peripheral surface of the support frame is opposite to the limiting part, and the support frame and the limiting part are welded in a welding mode, so that the manufacturing steps are saved.

Or, the side wall of the opening of the support frame and the shell can be directly connected in a welding mode without arranging the bending part, the limiting part and the hook part, so that the manufacturing steps are saved.

The outer peripheral surface of the hardware 11 is an inclined surface, and the diameter of the outer peripheral surface of the hardware 11 gradually increases towards the direction of the inner cavity close to the shell 2; the sealing ring 13 is further provided with a limiting protrusion 133, the limiting protrusion 133 is annular, the limiting protrusion 133 is close to the outer peripheral surface of the sealing ring 13 relative to the outer protrusion 131, the inner peripheral surface of the limiting protrusion 133 is an inclined surface, the diameter of the inner peripheral surface of the limiting protrusion 133 is gradually reduced towards the direction close to the inner cavity of the shell 2, and the inner peripheral surface of the limiting protrusion 133 is connected with the outer peripheral surface of the hardware 11. When the hardware 11 moves towards the inner cavity direction far away from the shell 2, the limiting protrusion 133 plays a role in hooking the edge of the hardware 11, and further separation of the hardware 11 and the sealing ring 13 is avoided.

In this embodiment, the spacing protrusion 133 is disposed in a gap with the hook 23, so as to prevent the spacing portion 22 from being blocked by the spacing protrusion 133 when the spacing portion 22 is bent inwards to form the hook 23, thereby facilitating the manufacture of the hook 23.

In other embodiments, the limiting protrusion may also be connected to the hook portion, so as to further improve the tightness of the sealing ring.

In this embodiment, the sealing ring 13 is further provided with an interference protrusion 134, the interference protrusion 134 is annular, the interference protrusion 134 is close to the outer peripheral surface of the sealing ring 13 relative to the limiting protrusion 133, the interference protrusion 134 is in interference extrusion with the hook 23, and the sealing ring 13 is tightly connected with the hook 23, so that the sealing performance is improved.

The surface of being connected with sealing washer 13 on the hardware 11 is provided with the reticulate pattern, can be simultaneously to its reticulate pattern of carving when die-casting hardware 11, practices thrift the manufacturing procedure, and the reticulate pattern has increased hardware 11 and sealing washer 13 adhesion, further avoids hardware 11 and sealing washer 13 separation.

In other embodiments, reticulation can be arranged on the surface, connected with the sealing ring, of the supporting frame, so that the adhesive force between the supporting piece and the sealing ring is increased, and the supporting frame is further prevented from being separated from hardware.

The hardware 11 comprises a panel 112 and a boss 113, the boss 113 is columnar and is provided with a conductive end 115 and a connecting end 114 which are opposite, the conductive end 115 is close to the inner cavity of the shell 2 relative to the connecting end 114, the panel 112 surrounds the connecting end 114, and the first connecting hole 111 is arranged on the panel 112; the button cell with the high structural reliability of the upper cover assembly 1 further comprises a cell 3, the cell 3 is positioned in the shell 2, the inner edge of the sealing ring 13 protrudes out of the inner edge of the supporting frame 12, the boss 113 penetrates through the hollow part of the sealing ring 13, and the conductive end 115 is connected with the cell 3. The electric core 3 is used for storing electric energy, the boss 113 is welded and conducted with the electric core 3, and when the hardware 11 is connected with electric equipment, the battery can convey current to the electric equipment.

Referring to fig. 6, in the present embodiment, the panel 112 protrudes from the sealing ring 13 and the hook 23 in a direction away from the inner cavity of the housing 2, and the protruding panel 112 is convenient for connection with electrical equipment and convenient for use.

Referring to fig. 2, the end face of the conductive end 115 facing the inside of the housing 2, the end face of the inner protrusion 132 facing the inside of the housing 2, and the face of the support frame 12 facing the inside of the housing 2 are located on the same plane, and in the radial direction of the housing 2, the content of the housing 2 is larger, which is beneficial to improving the performance of the battery.

The outer bulge 131 is flush with the outer surface of the hardware 11, so that the outer surface of the battery is neat, the use feeling is improved, the size of the battery in the axial direction of the battery is shortened, the space occupied by the battery for electric equipment is smaller, and the battery is convenient to use.

The battery core 3 includes a winding core 33, a first tab 31, and a second tab 32, where the first tab 31 is welded and conducted with the housing 2, and the second tab 32 is welded and conducted with the hardware 11, and the welding mode may be spot bottom resistance welding, dual-needle resistance welding, or laser welding, and is preferably dual-needle resistance welding.

The battery cell 3 is of a laminated type, the laminated type battery cell 3 has high energy density and flexible volume, and is convenient to assemble with the upper cover.

The button cell with high structural reliability of the upper cover assembly 1 further comprises a pressure relief valve, and the pressure relief valve is arranged at the end part of the shell 2 or on the hardware 11. The pressure release valve can be integrally formed with the housing 2 or the hardware 11, and the periphery of the pressure release valve is grooved. Alternatively, the relief valve may be in the form of a sheet, and the relief valve is welded to the housing 2 or the hardware 11. Or the pressure release valve is membranous, the shell 2 or the hardware 11 is provided with a valve port, the valve port can be round, square or oval, and the pressure release valve is hot-pressed and fused at the valve port in the form of an explosion-proof membrane.

When the button cell with the high structural reliability of the upper cover assembly 1 provided by the first embodiment of the utility model is assembled, the battery core 3 is firstly arranged in the inner cavity of the shell 2, then the upper cover assembly 1 consisting of three parts of the hardware 11, the sealing ring 13 and the supporting frame 12 is arranged, the first tab 31 is welded with the shell 2 in the battery shell, the second tab 32 is welded with the hardware 11, then electrolyte is injected into the shell 2, the semi-finished product is put into the curling jig, finally the hook part 23 is formed by curling the jig for packaging, the production and manufacturing process is simple, and the packaged button cell with high tightness and high capacity is formed.

Or, the battery core 3 may be first installed into the inner cavity of the casing 2, then the upper cover assembly 1 comprising the hardware 11, the sealing ring 13 and the supporting frame 12 is installed, the electrolyte is injected into the casing 2, then the semi-finished product is placed into the curling jig, the hook 23 is formed by curling the jig for packaging, finally the first tab 31 is welded with the casing 2 from the outside of the battery casing, and the second tab 32 is welded with the hardware 11.

Referring to fig. 7, a button cell with reliable connection of an upper cover assembly is provided in a second embodiment of the present utility model, which includes an upper cover assembly 1, a housing 2, a battery cell 4 and a pressure release valve, wherein the structures of the upper cover assembly 1, the housing 2 and the pressure release valve are the same as those of the first embodiment, and the structure of the battery cell 4 is not repeated here, and the structure of the battery cell 4 is different from that of the first embodiment. The battery core 4 comprises a winding core 43, a first tab 41 and a second tab 42, wherein the first tab 41 is welded and conducted with the housing 2, the second tab 42 is welded and conducted with the hardware 11, and the welding mode can be spot bottom resistance welding, double-needle resistance welding, laser welding or the like, preferably double-needle resistance welding.

The battery cell 4 is of a winding type, and the winding type battery cell is easy to weld and convenient to control production.

When the button cell with high structural reliability of the upper cover assembly 1 according to the second embodiment of the present utility model is assembled, the assembly steps are the same as those of the first embodiment, and will not be repeated here.

In summary, although the present utility model has been described in terms of the first embodiment, the first embodiment is not intended to limit the utility model, and one of ordinary skill in the art can make various modifications and adaptations without departing from the spirit and scope of the utility model, and the scope of the utility model is therefore defined by the appended claims.

Claims

1. A button cell with reliable connection of an upper cover assembly, characterized in that: the novel anti-theft device comprises an upper cover assembly and a shell, wherein the shell is cylindrical, one end of the shell is provided with an opening, the upper cover assembly is positioned at the opening of the shell, the upper cover assembly comprises hardware, a support frame and a sealing ring, the hardware, the sealing ring and the support frame are sequentially connected in a stacked manner along the axial direction of the shell, and the support frame is close to an inner cavity of the shell relative to the hardware and is connected with the opening of the shell;

the hardware is plate-shaped and is provided with a first connecting hole;

the support frame is annular and is provided with a second connecting hole;

2. The positive battery of claim 1, wherein the cap assembly is securely attached to the battery cell: the sealing ring is formed by in-mold injection molding between the hardware and the supporting frame, the outer bulge is formed in the first connecting hole by injection molding, and the inner bulge is formed in the second connecting hole by injection molding.

3. The positive battery of claim 1, wherein the cap assembly is securely attached to the battery cell: the first connecting hole is in a frustum shape, the cross section area of the first connecting hole gradually increases towards the direction away from the inner cavity of the shell, and the outer protrusion is in a frustum shape matched with the first connecting hole.

4. The positive battery of claim 1, wherein the cap assembly is securely attached to the battery cell: the second connecting hole is cylindrical, the axial direction of the second connecting hole is parallel to the axial direction of the shell, and the inner protrusion is cylindrical matched with the second connecting hole.

5. The positive battery of claim 1, wherein the cap assembly is securely attached to the battery cell: the first connecting holes and the second connecting holes are all arranged in a plurality, the first connecting holes are annularly arranged on the hardware, and the second connecting holes are annularly arranged on the supporting frame.

6. The positive battery of claim 1, wherein the cap assembly is securely attached to the battery cell: the opening edge of the shell is outwards folded to form an annular bending part, the bending part is outwards folded away from the direction in the shell to form an annular limiting part, the limiting part is inwards folded to form an annular hook part, the bending part, the limiting part and the hook part are connected to form a U-shaped part, and the edge of the support frame and the edge of the sealing ring are both positioned in the U-shaped part.

7. The positive battery of claim 1, wherein the cap assembly is securely attached to the battery cell: the outer peripheral surface of the hardware is an inclined surface, and the diameter of the outer peripheral surface of the hardware gradually increases towards the direction close to the inner cavity of the shell;

8. The positive battery of claim 1, wherein the cap assembly is securely attached to the battery cell: and reticulation is arranged on the surface, connected with the sealing ring, of the hardware.

9. The positive battery of claim 1, wherein the cap assembly is securely attached to the battery cell: the hardware comprises a panel and a boss, wherein the boss is columnar and is provided with a conductive end and a connecting end which are opposite to each other, the conductive end is close to an inner cavity of the shell relative to the connecting end, the panel surrounds the connecting end, and the first connecting hole is formed in the panel;

10. The positive battery of claim 9, wherein the cap assembly is securely attached to the battery cell: the battery cell is of a winding type or laminated type.