CN116259896A

CN116259896A - Button cell convenient to preparation

Info

Publication number: CN116259896A
Application number: CN202310130445.0A
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: 2023-02-01
Filing date: 2023-02-01
Publication date: 2023-06-13

Abstract

The invention provides a button cell convenient to prepare, which comprises an upper cover component and a shell; the upper cover assembly comprises an upper cover and a sealing ring, the sealing ring is connected between the upper cover and the opening end of the shell, the opening end of the shell is bent towards the outer side to form a step-shaped positioning structure, the positioning structure comprises a supporting ring and a positioning ring, the supporting ring is connected between the positioning ring and the side wall of the shell and is supported on the sealing ring, the positioning ring surrounds the periphery of the sealing ring, and the positioning ring is bent towards the sealing ring to form a limiting part. The peripheral edge of the upper cover is embedded in the sealing ring, so that the preparation is convenient, the connection strength between the upper cover and the sealing ring is improved, and the upper cover is not easy to loosen; meanwhile, the structural strength of the sealing ring can be improved by utilizing the inner upper cover structure of the sealing ring, and the outer diameter of the peripheral edge of the upper cover is larger than the diameter of the inner side wall of the shell, so that the support function can be achieved in the subsequent crimping process, the deformation in the assembly process is reduced, the preparation is convenient, and the structural strength is higher.

Description

Button cell convenient to preparation

Technical Field

The invention relates to the technical field of button cells, in particular to a button cell convenient to prepare.

Background

Button cells are commonly used batteries for electronic devices. The button cell packaging structure in the prior art mainly has two forms. In the packaging structure, the packaging structure is composed of an upper shell, a shell and a sealing element, wherein the upper shell and the shell are in a cylindrical shape with one end open and the other end closed, the opening directions of the upper shell and the shell are opposite, the upper shell is sleeved in the shell, the sealing element is in a tubular shape, and the side wall of the button cell of the packaging structure comprises the upper shell, the shell and the sealing element, so that the wall thickness is larger, the space of part of the anode material and the cathode material of the cell can be occupied, and the capacity of the cell is lower. In order to avoid this problem, another package structure has been developed, which forms an upper cap assembly from three parts of a hardware cap, a sealing ring, and a support frame through a hot pressing process, and the upper cap assembly is mounted to an opening of a case, thereby reducing the thickness of a battery wall. But the three parts are connected through a hot pressing process, the three parts are required to be aligned accurately before hot pressing, the process accuracy requirement is high, the preparation is not facilitated, and the efficiency is low; and the connection strength of the three parts after hot pressing can be poor, so that the three parts are easy to loosen.

Disclosure of Invention

The button cell is convenient to prepare and high in structural strength.

The invention provides a button cell convenient to prepare, which comprises an upper cover component and a shell; the shell is in a cylinder shape with one end open and the other end closed; the upper cover assembly comprises an upper cover and a sealing ring, the sealing ring is connected between the upper cover and the opening end of the shell, and the peripheral edge of the upper cover is embedded in the sealing ring; the opening end of the shell is bent towards the outer side to form a step-shaped positioning structure, the positioning structure comprises a supporting ring and a positioning ring, the supporting ring is connected between the positioning ring and the side wall of the shell and is supported by the sealing ring, the positioning ring surrounds the periphery of the sealing ring, the positioning ring is bent towards the sealing ring to form a limiting part, and the sealing ring is limited between the limiting part and the positioning ring; the outer diameter of the peripheral edge of the upper cover is larger than the diameter of the inner side wall of the shell.

Wherein, the sealing washer injection moulding is in the upper cover all around.

The sealing ring is provided with a plurality of connecting columns extending into the connecting holes.

The diameter of the peripheral edge of the upper cover is larger than the inner diameter of the limiting part; the peripheral edge of the upper cover is positioned between the limiting part and the positioning ring.

The upper cover comprises a top plate, side rings and edges, wherein the top plate, the side rings and the edges are integrally formed and are sequentially connected in a step shape; the top plate is remote from the closed end of the housing relative to the rim;

the edge is embedded in the sealing ring; or the edge and the side ring are embedded in the sealing ring.

The inner side of the sealing ring is provided with a fixing ring, and the fixing ring is attached to the inner surface of the side ring and the inner surface of the top plate; the difference between the outer diameter and the inner diameter of the fixing ring is larger than the wall thickness of the side ring in the radial direction of the shell.

The button cell convenient to prepare still includes the electric core, the electric core includes inner core, first utmost point ear, and second utmost point ear, the inner core set up in the inner chamber of shell, the inner core be coiling formula or range upon range of formula, first utmost point ear connect in the inner core with the roof, the second utmost point ear connect in the inner core with the blind end of shell.

The top center of the inner core protrudes to form a protruding structure, the protruding structure is located in a space between the top plate and the side plate, and the first tab is clamped between the protruding structure and the top plate.

The button cell convenient to prepare still includes plastic support piece, plastic support piece set up in the roof with between the inner core, the one end of first utmost point ear is located plastic support piece with between the roof.

The inner surface of the top plate faces the inner core, a boss is formed on the boss, the boss faces the connecting plane of the inner core, and one end of the first tab is welded to the connecting plane.

The button cell convenient to prepare provided by the invention has the advantages that the outer diameter of the peripheral edge of the upper cover is larger than the diameter of the inner side wall of the shell, so that the peripheral edge of the upper cover can be supported on the supporting ring or on the joint of the supporting ring and the shell; the peripheral edges of the upper cover are embedded into the sealing ring, so that the sealing ring is convenient to prepare, the connection strength between the sealing ring and the upper cover is improved, and the sealing ring is not easy to loosen; and meanwhile, the structural strength of the sealing ring can be improved by utilizing the upper cover structure in the sealing ring, the supporting effect is achieved in the subsequent crimping process, the deformation in the assembly process is reduced, the preparation is convenient, and the structural strength is higher.

Drawings

In order to more clearly illustrate the embodiments of the present invention 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 invention.

Fig. 1 is a perspective view of a button cell for easy manufacture provided by a first embodiment of the present invention;

FIG. 2 is an axial cross-sectional view of the button cell of FIG. 1 for ease of manufacture;

FIG. 3 is a perspective cross-sectional view of the button cell of FIG. 1 for ease of manufacture;

FIG. 4 is an enlarged view at A in FIG. 3;

fig. 5 is a cross-sectional view of a button cell convenient to manufacture provided by a second embodiment of the present invention;

fig. 6 is a cross-sectional view of a button cell convenient to manufacture provided by a third embodiment of the present invention;

fig. 7 is an axial sectional view of a button cell convenient to manufacture provided by a fourth embodiment of the present invention;

FIG. 8 is a perspective cross-sectional view of the button cell of FIG. 7 for ease of manufacture;

FIG. 9 is an exploded view of the button cell of FIG. 7 for ease of manufacture;

FIG. 10 is a schematic view showing the structure of an upper cover of the button cell convenient to manufacture in FIG. 7;

FIG. 11 is a schematic view of the plastic support of the button cell of FIG. 7 for ease of manufacture;

fig. 12 is an axial sectional view of a button cell convenient to manufacture provided by a fifth embodiment of the present invention;

FIG. 13 is a perspective cross-sectional view of the button cell of FIG. 12 for ease of manufacture;

FIG. 14 is a schematic view showing the structure of an upper cover of the button cell convenient to manufacture in FIG. 12;

fig. 15 is an axial sectional view of a button cell convenient to manufacture provided by a sixth embodiment of the present invention;

FIG. 16 is a schematic view of the upper cap assembly of the button cell of FIG. 15 for ease of manufacture;

fig. 17 is an axial sectional view of a button cell convenient to manufacture provided by a seventh embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention 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 invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The words "first," "second," and the like in the terminology of the present invention 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 invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; 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 invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1 to 3, a button cell battery of the first embodiment of the present invention includes a housing 1, an upper cover assembly 2, and a battery cell 3. The shell 1 is a cylinder with one end open and the other end closed; the battery cell 3 is arranged in the shell 1, and the upper cover assembly 2 is arranged at the opening end of the shell 1, so that the inner cavity of the shell 1 forms a closed cavity so as to be convenient for accommodating the battery cell 3.

The upper cover assembly 2 comprises an upper cover 21 and a sealing ring 22, wherein the sealing ring 22 is connected between the upper cover 21 and the shell 1, so that the upper cover 21 and the shell 1 can be sealed and insulated, and the upper cover 21 and the shell 1 can respectively output positive and negative electrodes.

The peripheral edges of the upper cover 21 are embedded in the sealing ring 22, so that the upper cover 21 and the sealing ring 22 are tightly connected into a whole assembly, and the structural strength of the sealing ring 22 can be improved. The outer diameter of the peripheral edge of the upper cover 21 is larger than the inner wall diameter of the outer shell 1.

The open end of the shell 1 is bent towards the outside to form a step-shaped positioning structure, the positioning structure comprises a supporting ring 11 and a positioning ring 12, the supporting ring 11 is connected between the positioning ring 12 and the side wall of the shell 1 and is supported on a sealing ring 22, the positioning ring 12 surrounds the periphery of the sealing ring 22, the positioning ring 12 is bent towards the sealing ring 22 to form a limiting part 13, and the sealing ring 22 is limited between the limiting part 13 and the positioning ring 12. The periphery of the sealing ring 22 can be positioned by utilizing the positioning ring 12 which surrounds the periphery of the sealing ring 22; by means of the cooperation of the limiting part 13 and the positioning ring 12, the sealing ring 22 can be positioned in the axial direction of the shell 1, and the whole formed by the sealing ring 22 and the upper cover 21 is firmly and reliably positioned at the opening end of the shell 1.

The outer diameter of the peripheral edge of the upper cover 21 is larger than the diameter of the inner side wall of the shell 1, so that the peripheral edge of the upper cover 21 can be supported on the supporting ring 11 or on the joint of the supporting ring 11 and the shell 1. The structural strength of the sealing ring 22 can be improved by utilizing the peripheral edge of the upper cover 21, the supporting effect is achieved in the curling process, and the deformation in the assembling process is reduced, so that a supporting frame in the prior art can be omitted, the preparation process is optimized, the preparation of the button cell is more convenient, the utilization rate of the internal space of the cell can be improved after the supporting frame is removed, and the button cell with high manufacturing efficiency and large capacity is facilitated.

During assembly, the positioning ring 12 and the supporting ring 11 of the shell 1 can be formed by punching, then the whole body formed by the sealing ring 22 and the upper cover 21 is assembled into the shell 1, the positioning ring 12 is bent to form the limiting part 13 by using crimping equipment, and the sealing ring 22 is limited at the opening end of the shell 1 by using the limiting part 13, so that the assembly is convenient.

The sealing ring 22 is injection molded around the upper cover 21. After the upper cover 21 is formed by processing a metal material, the upper cover 21 can be put into a sealing ring 22 die for injection molding to form the sealing ring 22, and the edge can be embedded into the sealing ring 22 in the mode, so that the connection is firm and reliable. The sealing ring 22 is preferably made of any one of PI (Polyimide), PP (Polypropylene), PS (Polystyrene), and PEEK (Polyetheretherketone), and is beneficial to injection molding, and has a certain structural strength while ensuring effective sealing. The sealing ring 22 is secondarily sleeved on the edge of the upper cover 21 through beer injection molding, so that the battery polarity insulation and battery sealing effect are formed. Here, in other embodiments, the sealing ring 22 may be formed separately, and the inner side surface thereof is provided with an annular groove, and the peripheral edge of the upper cover 21 is inserted into the annular groove, so that the peripheral edge of the upper cover 21 is embedded in the sealing ring 22.

The outer diameter of the peripheral edge of the upper cover 21 is larger than the inner diameter of the limiting part 13; the peripheral edge of the upper cover 21 is located between the limiting part 13 and the positioning ring 12. When the hemming package is performed, the limiting part 13 can cover the upper part of the peripheral edge of the upper cover 21, so that the connection is firmer. The limiting part 13 is arranged at intervals with the side ring so as to ensure the electric isolation of the limiting part and the side ring.

In this embodiment, the upper cover 21 includes a top plate 211, a side ring 212, and an edge 213, the top plate 211, the side ring 212, and the edge 213 are integrally formed and sequentially connected in a step shape, the top plate 211 is opposite to the edge 213 and far away from the closed end of the housing 1, the edge 213 extends towards the outer side of the side ring 212, the edge 213 forms the peripheral edge of the upper cover 21, and the outer diameter of the peripheral edge of the upper cover 21 is the outer diameter of the edge 213. The opposite edge 213 of the top plate 211 is far away from the closed end of the housing 1, so that the top plate 211 protrudes towards the direction far away from the inner cavity of the housing 1, so that other electric equipment can be in contact electrical connection.

The upper cover 21 may be formed by stamping a metal plate so that the top plate 211, the side ring 212, and the rim 213 are integrally formed, thereby improving structural strength. Meanwhile, the top plate 211, the side rings 212 and the edges 213 are connected into a step shape, so that the whole upper cover 21 is not easy to bend and deform, the subsequent injection molding with the sealing ring 22 is facilitated, and the assembly connection with the open end of the shell 1 is facilitated. Here, in other embodiments, the upper cover 21 may be die-cast. The upper cover 21 may be made of metal such as stainless steel or aluminum alloy.

In the axial direction of the housing 1, the outer surface of the top plate 211 protrudes out of or is flush with the outer surface of the limiting portion 13, so as to further facilitate the electrical connection between the outer surface of the top plate 211 and the electrical equipment. Here, it is understood that the outer surfaces refer to the surfaces of the top plate 211 and the limiting part 13 facing away from the inner cavity of the housing 1, that is, the upper surfaces of the top plate 211 and the limiting part 13 in the illustration; the inner surface of the top plate 211 is the surface of the top plate facing the housing cavity, i.e. the lower surface of the top plate 211 in the illustration.

The edge 213 and the side ring 212 are embedded in the sealing ring 22, so that the sealing ring 22 has larger size in the radial direction of the shell 1, and the sealing effect is effectively ensured; because the side ring 212 is connected with the edge 213 in a bending shape, the inner side of the sealing ring 22 is coated outside the side ring 212, so that the sealing ring 22 and the upper cover 21 are firmly and reliably connected to form a tightly connected integral structure.

Preferably, the edge 213 may be provided with a reticulation, which is a plurality of grooves crisscrossed with each other, so that the adhesion between the edge and the sealing ring can be further improved by using the reticulation.

In this embodiment, the seal ring 22 includes an upper ring 221, an outer ring 222, a lower ring 223, and an inner ring 224, which are sequentially connected, and the upper surface of the rim 213 is attached to the upper ring 221, the lower surface is attached to the lower ring 223, and the circumferential surface is attached to the outer ring 222, so that the rim 213 is embedded in the seal ring 22. The outer surface of the side ring 212 is attached to the upper ring 221, the inner surface is attached to the inner ring 224, and the top end of the inner ring 224 is abutted to the top plate 211, so that the side ring 212 is also embedded in the sealing ring 22. Here, in other embodiments, it is also possible that only the rim 213 is embedded inside the sealing ring 22, while the side ring 212 is located outside the sealing ring 22.

In the axial direction of the housing 1, the overall thickness dimension of the sealing ring 22 is 1.5-3 times that of the edge 213, so that the thickness of the sealing ring 22 covered on the edge 213 is moderate, the sealing effect can be effectively achieved, and the structural strength of the sealing ring 22 can be improved by means of the edge 213. In the axial direction of the housing 1, the thickness dimension of the upper ring 221 is 0.5-1 times that of the rim 213, so that the top plate 211 protrudes a small height relative to the rim 213, so that the top plate 211 protrudes relative to the limiting portion 13, and the top plate 211 can be conveniently electrically connected with the electronic device.

The battery core 3 comprises an inner core 30, a first tab 31 and a second tab 32, wherein the inner core 30 is arranged in an inner cavity of the shell 1, the inner core 30 is coiled or laminated, the first tab 31 is connected with the inner core 30 and the top plate 211, the second tab 32 is connected with the inner core 30 and the closed end of the shell 1, the first tab 31 and the second tab 32 are respectively connected with the positive electrode and the negative electrode of the inner core 30, and the positive electrode and the negative electrode are output through the top plate 211 and the shell 1. The first tab 31 is welded to the top plate 211, and the second tab 32 is welded to the closed end of the housing 1, and the welding manner may be spot bottom resistance welding, double needle resistance welding, laser welding, or the like, preferably double needle resistance welding. In this embodiment, the inner core 30 is located between the sealing ring 22 and the closed end of the housing 1, and a hollow area is formed between the top surface of the inner core 30 and the top plate 211.

In this embodiment, the top plate 211 of the upper cover 21 is protruded opposite to the edge 213, so as to facilitate connection with other electrical devices. Of course, in other embodiments, the upper cover 21 may be entirely flat plate-shaped without providing the protruding step structure of the top plate 211.

The coin cell further comprises a pressure relief valve 5, the pressure relief valve 5 being arranged on the closed end or top plate 211 of the housing 1. The relief valve 5 may be integrally formed with the housing 1 or the top plate 211, with the periphery of the relief valve 5 being grooved. Alternatively, the relief valve 5 may be formed in a sheet shape, and the relief valve 5 may be connected to the housing 1 or the top plate 211 by welding. Or the pressure release valve 5 is membranous, a valve port is arranged on the shell 1 or the top plate 211, the valve port can be round, square or oval, and the pressure release valve 5 is hot-pressed and fused at the valve port in the form of an explosion-proof film.

In the scheme, the button cell is optimized through structural design and manufacturing process, the position of the traditional sealing ring 22 is changed to the top, the sealing ring 22 and the upper cover 21 are subjected to a secondary forming process to obtain the upper cover assembly 2, the shell 1 is in a step structure and is used for supporting and placing the upper cover 21 and the sealing ring 22, and a supporting frame is omitted; the manufacturing process is optimized by improving the layout of parts in the internal space of the button cell, and the manufacturing process is simple, so that the utilization rate of the internal space is improved, and the button cell with high manufacturing efficiency and large capacity is manufactured; the battery packaging mode is hemming packaging.

As shown in fig. 5, a button cell battery of the second embodiment of the present invention includes an upper cover assembly 2, a housing 1, and a battery cell 3. In this embodiment, the shape and structure of the upper cover assembly 2 and the housing 1 are the same as those of the first embodiment, and will not be described here again. The main difference between this embodiment and the first embodiment is the structure of the cell 3.

In this embodiment, the inner core 30 of the battery core 3 is a winding type, and includes a first winding core 301 and a second winding core 302, the second winding core 302 is wound outside the first winding core 301, the first winding core 301 protrudes from the second winding core 302, and the protruding portion thereof is located in the area surrounded by the top plate 211 and the side ring 212 and is supported by the first tab 31; the second winding core 302 is located between the sealing ring 22 and the closed end of the housing 1. The higher first winding core 301 can be used for filling the space surrounded by the top plate 211 and the side ring 212, so that the space is fully utilized, and the first winding core 301 can support the first tab 31, so that the welding between the first tab 31 and the top plate 211 is facilitated.

As shown in fig. 6, a button cell battery of the third embodiment of the present invention includes an upper cover assembly 2, a housing 1, and a battery cell 3. This embodiment differs from the two previous embodiments in the structure of the battery cell 3, and the rest is the same as the two previous embodiments, and will not be described here again.

In this embodiment, the inner core 30 of the battery core 3 is a laminated core, and includes a first laminated core 303 and a second laminated core 304, wherein the first laminated core 303 is located between the sealing ring 22 and the closed end of the housing 1, and the second laminated core 304 is located on the first laminated core 303 and is supported on the first tab 31. The second stacked core 304 can support the first tab 31, so as to facilitate welding between the first tab 31 and the top plate 211. Meanwhile, the second stacked core 304 is located in the area surrounded by the top plate 211 and the side ring 212, and can fill the space surrounded by the top plate 211 and the side ring 212, so that the space is fully utilized, the utilization rate of the internal space of the battery is improved, and the manufacturing efficiency is high, and the button cell with large capacity is facilitated.

In the second and third embodiments, the inner core 30 of the battery cell 3 is divided into two parts and connected into a protruding structure with a protruding top center, the protruding structure is located in a space between the top plate 211 and the side plate, and the first tab 31 is clamped between the protruding structure and the top plate 211, and the structure can facilitate welding between the tab and the upper cover 21, but the manufacturing cost of the battery cell 3 is slightly high. In order to reduce the cost, the invention also provides the following technical scheme for facilitating the welding between the tab and the upper cover 21.

As shown in fig. 7, 8 and 9, a button cell battery of the fourth embodiment of the present invention includes an upper cover assembly 2, a housing 1, a battery cell 3 and a plastic support 4. This embodiment is based on a further improvement of the first embodiment.

In this embodiment, as shown in fig. 10, a plurality of connection holes 210 are formed on the peripheral edge of the upper cover 21, a plurality of connection posts 220 extending into the connection holes 210 are formed on the sealing ring 22, and the adhesion force between the upper cover 21 and the sealing ring 22 can be increased by using the cooperation between the connection posts 220 and the connection holes 210, so that the upper cover 21 and the sealing ring 22 are further connected reliably, and the pull-out phenomenon between the upper cover 21 and the sealing ring 22 is prevented. Specifically, the connecting hole 210 is first formed along the upper process, then the upper cover 21 is put into the mold of the sealing ring 22, and the plastic can be directly filled into the connecting hole 210 to form the connecting column 220 after glue injection, so as to facilitate the preparation.

Further, in the present embodiment, the connection holes 210 are disposed on the edge 213, and the plurality of connection holes 210 are arranged in a ring shape along the edge 213, so that the sealing ring 22 and the edge 213 are firmly and reliably connected at various positions in the circumferential direction.

In this embodiment, the connection hole 210 is a through hole, and is conveniently formed by stamping. Of course, in other implementations, the connection hole 210 may be a blind hole, or the connection hole 210 may be a half hole provided at the peripheral surface of the rim 213 in a notch shape.

It will be appreciated that the cooperation of the connecting hole 210 and the connecting post 220 in this embodiment is applicable to any other embodiment of the present invention.

In this embodiment, as shown in fig. 7, the inner core 30 of the battery core 3 is located between the closed end of the housing 1 and the sealing ring 22, so that a space distance exists between the inner core 30 and the top plate 211, and a certain difficulty exists in welding between the top plate 211 and the first tab 31. The plastic support piece 4 is arranged between the top plate 211 and the inner core 30 so as to fill the space, one end of the first tab 31 is positioned between the plastic support piece 4 and the top plate 211, the first tab 31 can be supported by the plastic support piece 4, and the first tab 31 is better in contact welding with the top plate 211 when the upper cover assembly 2 is assembled.

The plastic support 4 is preferably made of any one of PI (Polyimide), PP (Polypropylene), and PS (Polystyrene).

Further, as shown in fig. 11, the plastic support 4 is provided with a through hole 40, the through hole 40 penetrates the plastic support 4 along the axial direction of the housing 1, the first tab 31 penetrates the through hole 40, and the through hole 40 is utilized to avoid the first tab 31 from being empty, so that the plastic support 4 is prevented from blocking the connection between the first tab 31 and the top plate 211 and the inner core 30.

At least one through hole 40 is provided to facilitate the first tab 31 to be penetrated at a proper position. The through hole 40 may be square, arc, etc., and in this embodiment, the through hole 40 is arc-shaped to facilitate the penetration of the first tab 31.

During assembly, one end of the first tab 31 is fixed on the inner core 30 and penetrates through the through hole 40 of the plastic support piece 4, the lower surface of the plastic support piece 4 is coaxially arranged with the inner core 30 and is attached to the diaphragm of the inner core 30, and then the first tab 31 is bent for 90 degrees and attached to the upper surface of the plastic support piece 4; then the battery core and the plastic support piece 4 are arranged in the inner cavity of the shell, the upper cover component 2 is arranged, electrolyte is injected, the semi-finished product component is arranged in a curling jig, the positioning ring is curled and packaged through the jig, and finally the first tab 31 and the second tab 32 are welded, so that the production and manufacturing process is simple; after packaging, the novel structure button cell with high tightness is formed.

When the upper cover assembly 2 is assembled, the top plate 211 can be welded with the first tab 31 in a contact manner, and the first tab 31 can be effectively supported by the upper surface of the plastic support piece 4, so that welding between the first tab 31 and the top plate 211 is facilitated.

The outer periphery of the plastic support 4 is matched with the inner Zhou Guodu of the sealing ring 22 so as to realize the positioning of the plastic support 4 in the upper cover assembly 2 and prevent the stability of the first tab 31 from being influenced by larger displacement.

In the above embodiment, the first tab 31 passes through the through hole 40 to connect the top plate 211 and the inner core 30, where in other embodiments, the first tab 31 may bypass from the side surface of the plastic support 4 to the top surface of the plastic support 4 to connect with the top plate 211.

As shown in fig. 12 and 13, a button cell battery of the fifth embodiment of the present invention includes an upper cover assembly 2, a housing 1, and a battery cell 3. The peripheral edge of the upper cover 21 is embedded in the sealing ring 22 to improve the structural strength of the sealing ring 22, the sealing ring 22 is connected with the opening end of the shell 1 through crimping assembly, and the battery cell 3 is arranged in the shell 1.

In this embodiment, the shape of the upper cover 21 is the same as that of the previous embodiment, and the upper cover includes a top plate 211, a side ring 212 and a rim 213, wherein the top plate 211, the side ring 212 and the rim 213 are integrally formed and sequentially connected in a step shape, the top plate 211 is far from the closed end of the housing 1 relative to the rim 213, and the rim 213 extends towards the outer side of the side ring 212. The connection relationship between the opening end of the housing 1 and the sealing ring 22 and the upper cover 21 is the same as that of the previous embodiment, and will not be repeated here.

The seal ring 22 comprises a fixing ring 225, and the fixing ring 225 is attached to the inner surface of the side ring 212 and the inner surface of the top plate 211; the difference between the outer diameter and the inner diameter of the fixing ring 225 in the radial direction of the housing 1 is larger than the wall thickness of the side ring 212. The fixing ring 225 can improve the structural strength of the connection between the seal ring 22 and the upper cover 21.

More specifically, the seal ring 22 further includes an upper ring 221, an outer ring 222, and a lower ring 223 connected in sequence, and the upper surface of the rim 213 is fitted with the upper ring 221, the lower surface is fitted with the lower ring 223, and the peripheral surface is fitted with the outer ring 222, so that the rim 213 is embedded in the seal ring 22. The fixing ring 225 is connected to the lower ring 223 and is integrally injection-molded to further improve structural strength.

Further, as shown in fig. 14, the top plate 211 is provided with a through hole 2110, and the fixing ring 225 is provided with a reinforcing column 2250 filled in the through hole 2110, so that the connection strength between the seal ring 22 and the upper cover 21 can be improved by the cooperation between the through hole 2110 and the reinforcing column 2250. The through hole 2110 may be formed by punching the upper cover 21, and the reinforcing column 2250 may be formed by filling the through hole 2110 when the seal ring 22 is injection-molded. The reinforcement post 2250 is flush with the outer surface of the top plate 211 to facilitate injection molding. The reinforcement post 2250 may be exposed through the through hole 2110, and the through hole 2110 may be designed in various shapes, for example, may be designed in a letter shape to indicate the model specification of the button cell. The cooperating structures of the reinforcement columns 2250 and the through holes 2110 may be multiple groups to form multiple pattern shapes, so that the button cell can be marked, a unique visual effect can be formed, the eye is attractive, and the product competitiveness is improved. Here, in other embodiments, the mating structure of the through hole and the reinforcing post may not be provided.

Here, the fixing ring 225 in the present embodiment can be equally applied to other embodiments of the present invention.

In this embodiment, as shown in fig. 12 and 13, the battery cell 3 includes an inner core 30, a first tab 31, and a second tab 32. The inner core 30 is disposed in the inner cavity of the housing 1 and between the sealing ring 22 and the closed end of the housing 1, and the inner core 30 is laminated. The first tab 31 is connected to the core 30 and the top plate 211, and the second tab 32 is connected to the closed ends of the core 30 and the casing 1.

The inner surface of the top plate 211 is formed with a boss 218 toward the inner core 30, the boss 218 has a connection plane toward the inner core 30, and one end of the first tab 31 is clamped between the connection plane and the inner core 30 and welded to the connection plane. By utilizing the boss 218, the distance between the upper cover 21 and the inner core 30 can be relatively short, the connection plane of the first tab 31 and the upper cover 21 is tightly attached, and welding between the first tab 31 and the upper cover 21 is facilitated. One end of the first tab 31 is clamped between the boss 218 and the inner core 30, and the inner core 30 is used for supporting the first tab 31, so that connection reliability is improved.

In this embodiment, the boss 218 is formed by stamping the upper cover 21, the inner surface of the top plate 211 is convex, and the outer surface of the corresponding top plate 211 is concave at the corresponding boss 218, so as to facilitate processing and preparation.

The boss 218 has a truncated cone shape, and the outer diameter of the boss 218 is gradually increased in a direction from the closed end to the open end of the housing 1 so as to be formed by punching. The outer diameter of one end of the boss 218 connected with the top plate 211 is 1/4-1/3 of the outer diameter of the top plate 211, so that the boss 218 occupies a smaller area of the top plate 211, and the outer surface of the top plate 211 is ensured to have a large enough plane area so as to be beneficial to connection with electronic equipment.

As shown in fig. 15 and 16, a button cell battery of a sixth embodiment of the present invention includes an upper cover assembly 2, a housing 1, and a battery cell 3. The connection structure between the sealing ring 22, the housing 1, and the battery cell 3, the upper cover 21 and the sealing ring 22 may be the same as that of the foregoing embodiment, and will not be described herein again.

In this embodiment, the upper cover 21 may be machined or die-cast, the boss 218 is formed by machining or die-casting the upper cover, the boss 218 is solid, and the whole outer surface of the top plate 211 is planar, so as to facilitate the electrical connection between the top plate 211 and the electrical equipment, and improve the structural strength of the boss 218. The outer diameter of one end of the boss 218 close to the inner core is 1/2-2/3 of the outer diameter of the top plate 211, so that the connecting plane area between the boss 218 and the first tab 31 is larger, the first tab 31 is clamped firmly, and welding between the boss and the first tab 31 is facilitated.

The boss structures in the fifth and sixth embodiments of the present invention are equally applicable to the second and third embodiments, that is, in the space between the top plate and the side plate, the protruding structure of the inner core occupies a part of the space, the boss 218 of the top plate occupies a part of the space, and the first tab can be clamped between the protruding structure and the boss.

As shown in fig. 17, the button cell battery of the seventh embodiment of the present invention is different from the aforementioned sixth embodiment only in that the inner core 30 of the battery cell 3 is laminated, and other portions are the same as those of the sixth embodiment, and will not be repeated here.

In the foregoing first, fourth to sixth embodiments, the inner cores of the cells may be laminated or wound. The points not described in detail in the second to sixth embodiments are the same as those in the first embodiment.

In summary, although the present invention has been described in terms of the preferred embodiments, the above-mentioned embodiments are not intended to limit the invention, and those skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention, so that the scope of the invention is defined by the appended claims.

Claims

1. A button cell convenient to prepare is characterized by comprising an upper cover component and a shell; the shell is in a cylinder shape with one end open and the other end closed; the upper cover assembly comprises an upper cover and a sealing ring, the sealing ring is connected between the upper cover and the opening end of the shell, and the peripheral edge of the upper cover is embedded in the sealing ring; the opening end of the shell is bent towards the outer side to form a step-shaped positioning structure, the positioning structure comprises a supporting ring and a positioning ring, the supporting ring is connected between the positioning ring and the side wall of the shell and is supported by the sealing ring, the positioning ring surrounds the periphery of the sealing ring, the positioning ring is bent towards the sealing ring to form a limiting part, and the sealing ring is limited between the limiting part and the positioning ring; the outer diameter of the peripheral edge of the upper cover is larger than the diameter of the inner side wall of the shell.

2. The battery of claim 1, wherein the sealing ring is injection molded around the top cover.

3. The easy-to-manufacture button cell of claim 1, wherein the peripheral edge of the upper cover is provided with a plurality of connection holes, and the sealing ring is provided with a plurality of connection posts extending into the connection holes.

4. The button cell battery of claim 1, wherein the peripheral edge diameter of the upper cover is greater than the inner diameter of the limit part; the peripheral edge of the upper cover is positioned between the limiting part and the positioning ring.

5. The button cell convenient to manufacture according to any one of claims 1 to 4, wherein the upper cover comprises a top plate, a side ring and a rim, and the top plate, the side ring and the rim are integrally formed and sequentially connected in a step shape; the top plate is remote from the closed end of the housing relative to the rim;

6. The button cell battery of claim 5, wherein a fixing ring is arranged on the inner side of the sealing ring, and the fixing ring is attached to the inner surface of the side ring and the inner surface of the top plate; the difference between the outer diameter and the inner diameter of the fixing ring is larger than the wall thickness of the side ring in the radial direction of the shell.

7. The battery of claim 5, further comprising a battery cell comprising an inner core, a first tab, and a second tab, the inner core disposed in the inner cavity of the housing, the inner core being coiled or laminated, the first tab being connected to the inner core and the top plate, the second tab being connected to the inner core and the closed end of the housing.

8. The battery of claim 7, wherein the top center of the inner core protrudes to form a protruding structure, the protruding structure is located in a space between the top plate and the side plate, and the first tab is clamped between the protruding structure and the top plate.

9. The easy-to-manufacture button cell of claim 7, further comprising a plastic support disposed between the top plate and the inner core, wherein one end of the first tab is disposed between the plastic support and the top plate.

10. The battery of claim 7, wherein the top plate has an inner surface facing the inner core formed with a boss having a connection plane facing the inner core, and wherein one end of the first tab is welded to the connection plane.