CN220106695U - Button cell with tang structure - Google Patents

Abstract

The utility model provides a button cell with a spigot structure, which comprises an upper cover and a lower shell, wherein the upper cover comprises a cover body, an insulating sheet and a pole piece, the insulating sheet is arranged between the cover body and the pole piece, the insulating sheet separates the cover body and the pole piece, and an installation groove for installing the insulating sheet is formed in the cover body; the bottom of the cover body is provided with an upper stop part, the axial section of the upper stop part is in an inward concave L shape, and the upper stop part comprises a first surface and a second surface which are connected; the lower shell comprises a side wall, one end face of the side wall is a planar connecting face, the connecting face is abutted against the first face, and the inner surface of the side wall is abutted against the second face; the upper stop part is matched with the side wall to form a stop structure. According to the utility model, the spigot structure with the side wall matched with the upper spigot part is arranged to effectively prevent the upper cover and the lower shell from relative eccentric displacement, so that the upper cover and the lower shell can be accurately assembled when being assembled, the structural performance is reliable, the assembly efficiency is effectively improved, and the problem of poor welding is avoided.

Description

Button cell with tang structure

Technical Field

The utility model relates to the field of batteries, in particular to a button battery with a spigot structure.

Background

In the existing button cell of upper cover and inferior valve laser welding encapsulation, the upper cover is a smooth five metals panel, and upper cover and inferior valve assembly structure do not have tang spacing or location, can't accurate equipment, can produce relative eccentric displacement when upper cover and inferior valve equipment, misplacement, make it have empty welding, false welding phenomenon when the welding, can lead to the welding slag to splash to put inside the inferior valve because of having the tang, finally lead to finished battery size deviation, weeping, low in efficiency etc. bad phenomenon, finally can't satisfy market and customer's demand.

Disclosure of Invention

The button cell with the spigot structure provided by the utility model can be accurately assembled, has reliable structural performance, effectively improves the assembly efficiency, and avoids the problem of poor welding.

The technical scheme of the utility model is as follows: the button battery with the spigot structure comprises an upper cover and a lower shell, wherein the upper cover comprises a cover body, an insulating sheet and a pole piece, the insulating sheet is arranged between the cover body and the pole piece, the insulating sheet separates the cover body and the pole piece, and an installation groove for installing the insulating sheet is formed in the cover body;

the bottom of the cover body is provided with an upper spigot part, the axial section of the upper spigot part is of an inward concave L shape, and the upper spigot part comprises a first surface and a second surface which are connected;

the lower shell comprises a side wall and a bottom wall, one end face of the side wall is a planar connecting face, the connecting face is abutted to the first face, the inner surface of the side wall is abutted to the second face, and the bottom wall is connected with the other end of the side wall.

Further, the outer surface of the side wall is aligned with the outer peripheral surface of the cover.

Further, the pole piece comprises a panel and a boss which are connected with each other; the boss is arranged at the center of the panel, a first through hole used for the boss to pass through is arranged at the center of the insulating sheet, and a second through hole used for the boss to pass through is arranged at the center of the cover body.

Further, the mounting groove is arranged at the top of the cover body;

the bottom of panel supports and leans on the top of insulating piece, the inner chamber of inferior valve is provided with the utmost point core, the utmost point core contains first utmost point ear and second utmost point ear, the boss runs through first through-hole the second through-hole with first utmost point ear is connected, the second utmost point ear with the inferior valve is connected.

Further, the cover body, the insulating sheet and the pole piece are connected into a whole, and the top of the panel is flush with the top of the cover body, or the top of the panel is higher than the top of the cover body.

Further, the mounting groove is arranged at the bottom of the cover body;

the top of panel supports and leans on the bottom of insulating piece, the inner chamber of inferior valve is provided with the utmost point core, the utmost point core contains first utmost point ear and second utmost point ear, the panel with first utmost point ear is connected, the second utmost point ear with the inferior valve is connected.

Further, the cover body, the insulating sheet and the pole piece are connected into a whole, and the top of the boss is flush with the top of the cover body, or the top of the boss is higher than the top of the cover body.

Further, the boss is shell-shaped.

Further, the boss is solid.

Further, the insulating sheet is provided with a mounting groove for placing the panel.

Compared with the prior art, the utility model has the beneficial effects that:

1. through setting up lateral wall and last tang portion complex tang structure effectively prevents upper cover and inferior valve relative eccentric displacement, can accurate equipment when making upper cover and inferior valve equipment, its structural performance is reliable, effectively promotes assembly efficiency, avoids welding failure problem.

2. In the case of providing the upper stopper portion, in order to secure the overall strength of the upper cover, it is necessary to increase the thickness of the cover body, so that the battery height is compressed by providing the mounting groove, and the thickness of the entire upper cover is reduced, thereby improving the battery energy density.

3. The shell-shaped boss not only reduces the overall size of the battery, but also has smaller thickness along the matching direction of the upper cover and the lower shell, double-sided welding can be realized, and the process is simple.

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 diagram of an internal structure of a button cell with a wound electrode core and a spigot structure according to an embodiment of the utility model.

Fig. 2 is a schematic diagram of an internal structure of a button cell with a laminated pole core and a spigot structure according to an embodiment of the utility model.

Fig. 3 is a schematic diagram of an internal structure of a button cell with a spigot structure according to an embodiment of the utility model.

Fig. 4 is an enlarged schematic view of fig. 3 according to an embodiment of the present utility model.

Fig. 5 is a schematic view of the external structure of a button cell with a spigot structure according to an embodiment of the utility model.

Fig. 6 is a schematic view of an external structure of a button cell with a spigot structure according to an embodiment of the utility model.

Fig. 7 is an exploded view of the overall structure of a button cell with a spigot structure according to an embodiment of the utility model.

Fig. 8 is an exploded view of an upper cover structure of a button cell with a spigot structure according to an embodiment of the utility model.

Fig. 9 is a schematic diagram of an internal structure of an upper cover of a button cell with a spigot structure according to an embodiment of the utility model.

Fig. 10 is a schematic diagram of an internal structure of a button cell with a wound electrode core and a spigot structure according to a second embodiment of the present utility model.

Fig. 11 is a schematic diagram of the internal structure of a button cell with a laminated pole core and a spigot structure according to the second embodiment of the utility model.

Fig. 12 is a schematic diagram of an internal structure of a button cell with a spigot structure according to a second embodiment of the utility model.

Fig. 13 is an enlarged schematic diagram of fig. 12 according to a second embodiment of the present utility model.

Fig. 14 is a schematic view of the external structure of a button cell with a spigot structure according to a second embodiment of the utility model.

Fig. 15 is a schematic view of the external structure of a button cell with a spigot structure according to a second embodiment of the utility model.

Fig. 16 is an exploded view of the overall structure of a button cell with a spigot structure according to the second embodiment of the present utility model.

Fig. 17 is an exploded view of an upper cover structure of a button cell with a spigot structure according to a second embodiment of the present utility model.

Fig. 18 is a schematic diagram of the internal structure of the upper cover of the button cell with the spigot structure according to the second embodiment of the utility model.

Fig. 19 is a schematic view of the internal structure of a button cell with a wound-type tab structure according to the third embodiment of the present utility model.

Fig. 20 is a schematic diagram of the internal structure of a button cell with a tab structure, in which the tab is laminated, according to the third embodiment of the present utility model.

Fig. 21 is a schematic diagram of the internal structure of a button cell with a spigot structure according to the third embodiment of the utility model.

Fig. 22 is an enlarged schematic view of fig. 21 according to a third embodiment of the present utility model.

Fig. 23 is a schematic view showing an external structure of a button cell having a spigot structure according to a third embodiment of the present utility model.

Fig. 24 is a schematic view of the external structure of a button cell with a spigot structure according to the third embodiment of the utility model.

Fig. 25 is an exploded view of the overall structure of a button cell with a spigot structure according to the third embodiment of the present utility model.

Fig. 26 is an exploded view of a top cover of a button cell with a spigot structure according to a third embodiment of the present utility model.

Fig. 27 is a schematic view showing the internal structure of an upper cover of a button cell with a spigot structure according to a third embodiment of the utility model.

Fig. 28 is a schematic view of the external structure of the upper cover of the button cell with the spigot structure according to the third embodiment of the utility model.

1-upper cover, 11-cover body, 12-insulating piece, 13-pole piece, 131-panel, 132-boss, 14-mounting groove, 15-upper stop part, 151-first face, 152-second face, 16-first through hole, 17-second through hole.

2-lower shell, 21-side wall, 22-connection face.

3-pole core, 31-first pole ear, 32-second pole ear.

4-explosion-proof structure, 41-lower T-shaped through hole, 42-explosion-proof piece, 43-explosion-proof line, 44-upper T-shaped through hole.

a-welding position of the upper cover and the lower shell.

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 used in the present utility model, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", "top" and "bottom", are used for explaining and understanding the present utility model only with reference to the orientation of the drawings, 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 "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 utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1-9, a button cell with a spigot structure is provided in a first preferred embodiment of the present utility model, which includes an upper cover 1 and a lower cover 2, wherein the upper cover 1 includes a cover 11, an insulating sheet 12 and a pole piece 13, the insulating sheet 12 is disposed between the cover 11 and the pole piece 13, the insulating sheet 12 separates the cover 11 and the pole piece 13, and an installation groove 14 for installing the insulating sheet 12 is disposed on the cover 11; the bottom of the cover body 11 is provided with an upper spigot part 15, and the axial section of the upper spigot part 15 is of an inward concave L shape and comprises a first surface 151 and a second surface 152 which are connected; the lower case 2 includes a side wall 21 and a bottom wall 23, one end surface of the side wall 21 is a planar connection surface 22, and the bottom wall 23 is connected to the other end of the side wall 21. The connecting surface 22 is abutted to the first surface 151, the inner surface of the side wall 21 is abutted to the second surface 152, so that the upper spigot portion 15 and the side wall 21 are matched to form a spigot structure, relative eccentric displacement of the upper cover and the lower shell is effectively prevented, the upper cover and the lower shell can be accurately assembled during assembly, the structural performance is reliable, the assembly efficiency is effectively improved, and the problem of poor welding is avoided.

In the case of providing the upper stopper portion, in order to secure the overall strength of the upper cover 1, it is necessary to increase the thickness of the cover body 11, so that the battery height can be compressed by providing the mounting groove 14, the thickness of the entire upper cover 1 is reduced, and in the button battery of the same height, the battery energy density is improved by providing the mounting groove 14. In the axial direction of the button cell, the dimension of the second face 152 is equal to the depth of the mounting groove 14, so that the provision of the upper stop portion 15 and the mounting groove 14 does not change the overall thickness of the original upper cover 1, and the structural strength of the upper cover 1 is ensured.

In the first embodiment of the present utility model, preferably, the outer surface of the side wall 21 is aligned with the outer peripheral surface of the cover 11, so that the side surface of the button cell is smooth, and the assembly connection between the side wall 21 and the cover 11 is facilitated, and meanwhile, in the radial direction of the button cell, the size of the connecting surface 22 of the side wall 21 is equal to the size of the first surface 151, so that the connection at the welding position a of the upper cover and the lower case is ensured to be firm and reliable.

In the first embodiment of the present utility model, the side wall 21 and the bottom wall 23 of the lower case 2 are connected to form a cylinder shape with an opening at the top, and the axial section of the lower case 2 is in a "U" shape.

In the first embodiment of the present utility model, the upper spigot portion 15 is preferably disposed along the bottom edge of the cover 11, and the projection of the upper spigot portion 15 on the horizontal plane is annular, however, the projection of the upper spigot portion 15 on the horizontal plane may be other shapes, so long as the upper spigot portion 15 and the side wall 21 can cooperate to form a spigot structure.

In the first embodiment of the utility model, the cover 11 and the pole piece 13 are not contacted with each other, and are isolated by the insulating piece 12, and the cover 11 is insulated from the pole piece 13, so that the positive and negative poles of the battery are separated.

In the first embodiment of the present utility model, the insulating sheet 12 may be injection molded from plastic material, preferably any one of PI (collectively referred to as Po-lysine, i.e., polyimide), PP (collectively referred to as polypropylene), PS (collectively referred to as Pol ystyrene, i.e., polystyrene), and PEEK (collectively referred to as Polyether Ether Ketone, i.e., polyetheretherketone), and the insulating sheet 12 forms a battery polarity insulating and sealing function.

In the first embodiment of the present utility model, the pole piece 13 includes a panel 131 and a boss 132 connected to each other. The inventive boss 132 is disposed at the center of the panel 131, the center of the insulating sheet 12 is provided with a first through hole 16 through which the boss 132 passes, and the center of the cover 11 is provided with a second through hole 17 through which the boss 132 passes.

Because the cover 11 is insulated from the pole piece 13, the positive and negative poles of the battery are ensured to be separated, the inner diameter of the first through hole 16 is larger than or equal to the maximum outer diameter of the boss 132, and the inner diameter of the second through hole 17 is larger than the inner diameter of the first through hole 16, so that the pole piece 13 and the cover 11 are prevented from being contacted with each other.

In the first embodiment of the present utility model, the panel 131 and the boss 132 are integrally formed, and the two are firmly connected, so that the integrity is strong and the manufacturing is convenient.

In other embodiments, the panel 131 and the boss 132 may be connected by welding.

In the first embodiment of the present utility model, the mounting groove 14 is provided at the top of the cover 11, that is, the insulating sheet 12 is provided at the top of the cover 11, the bottom surface of the insulating sheet 12 abuts against the groove bottom surface of the mounting groove 14; the bottom of panel 131 supports and leans on the top of insulating piece 12, and the inner chamber of inferior valve 2 is provided with utmost point core 3, and utmost point core 3 contains first utmost point ear 31 and second utmost point ear 32, and boss 132 is located the bottom of panel 131 and runs through first through-hole 16, second through-hole 17 and be connected with first utmost point ear 31, and second utmost point ear 32 is connected with inferior valve 2 to boss 132 is welding conduction with first utmost point ear 31, and second utmost point ear 32 is welding conduction with inferior valve 2. The thickness of the insulating sheet 12 and the thickness of the mounting groove 14 may be the same so that the surface of the insulating sheet 12 and the surface of the cover 11 may be flush, so that the insulating sheet 12 is molded in the mounting groove 14 by injection molding.

In the first embodiment of the present utility model, the pole core 3 is used for storing electric energy, the pole core 3 transmits current to the electric device through the pole piece 13, the pole core 3 may be laminated or wound, and the pole core 3 may also take other forms, according to practical situations, but is not limited thereto.

In the first embodiment of the present utility model, the cover 11, the insulating sheet 12 and the pole piece 13 are integrally connected, and the top of the panel 131 is flush with the top of the cover 11, or the top of the panel 131 is higher than the top of the cover 11, so that the panel 131 is beneficial to supplying power to the electric equipment.

In the first embodiment of the present utility model, three parts of the cover 11, the insulating sheet 12 and the pole piece 13 may be formed by hot pressing.

In the first embodiment of the present utility model, the three parts of the cover 11, the insulating sheet 12 and the pole piece 13 may be further integrally manufactured by the following processes: 1. the pole piece 13 and the insulating piece 12 are secondarily injection-molded into an integral component, and the obtained integral component and the cover 11 are hot-pressed into a whole; 2. the cover 11 and the insulator sheet are secondarily injection-molded into an integral assembly, and the obtained integral assembly and the pole piece 13 are hot-pressed into a whole.

In the first embodiment of the present utility model, the pole piece 13 is preferably made of aluminum alloy by punching or die casting and is formed by turning.

In the first embodiment of the present utility model, the lower shell 2 is preferably formed by stamping a stainless steel material, and the lower shell 2 is formed by deep drawing and then bending the lower shell 2 to form a side wall 21 and a bottom wall 23 of the lower shell 2.

In the first embodiment of the present utility model, the boss 132 is shell-shaped. The shell-shaped boss 132 not only can reduce the overall weight, but also has smaller thickness along the direction of the matching of the upper cover 1 and the lower shell 2, can realize double-sided welding, and has simple process, that is, the boss 132 and the first tab 31 can be welded and conducted on the inner side of the boss 132, and the boss 132 and the first tab 31 can be welded and conducted on the outer side of the boss 132, so that the processing is easy.

When the boss 132 is welded to the first tab 31 at the outer side of the boss 132, a welding process without solder may be adopted, the boss 132 and the first tab 31 are in a molten state by using high temperature, and after cooling, the boss 132 is connected to and conducted with the first tab 31; the welding conduction between the boss 132 and the first tab 31 may be laser welding, resistance welding, plasma welding, etc., and of course, the welding conduction between the boss 132 and the first tab 31 may be other welding processes, which are not limited thereto according to practical situations.

When the boss 132 is welded and conducted with the first tab 31 at the inner side of the boss 132, a welding process without solder can be adopted, the boss 132 and the first tab 31 are respectively in a molten state by utilizing high temperature, at the moment, the upper cover 1 and the lower shell 2 are matched together, and the boss 132 is aligned with the first tab 31 due to the limit effect of the spigot structure; after the boss 132 and the first tab 31 are cooled, the boss 132 is connected and conducted with the first tab 31; the welding conduction between the boss 132 and the first tab 31 may be laser welding, resistance welding, plasma welding, etc., and of course, the welding conduction between the boss 132 and the first tab 31 may be other welding processes, which are not limited thereto according to practical situations.

In other embodiments, a mounting groove for placing the panel 131 may be provided on the insulating sheet 12, and the depth of the mounting groove is set to be compatible with the battery energy density, the strength of the cover 11, and the strength of the insulating sheet 12. The insulating sheet 12 can ensure that the cover body and the pole piece are mutually insulated, and the mounting groove is formed in the insulating sheet 12 so as to further ensure the overall thickness of the upper cover.

In the first embodiment of the present utility model, the insulating sheet 12, the pole piece 13 and the mounting groove 14 are all annular.

In the first embodiment of the present utility model, the first through hole 16, the second through hole 17 and the mounting groove 14 are all formed by punching or CNC processing, so that the back surfaces of the cover 11 and the insulating sheet 12 are not raised, and the back surfaces of the cover 11 and the insulating sheet 12 are also flat surfaces.

In the first embodiment of the present utility model, the first through hole 16, the second through hole 17, the mounting groove 14, the cover 11, the panel 131, the boss 132 and the insulating sheet 12 are all disposed concentrically, but of course, the first through hole 16, the second through hole 17, the mounting groove 14, the cover 11, the panel 131, the boss 132 and the insulating sheet 12 may be disposed non-concentrically, and the shape and position thereof may be selected according to practical situations, and are not limited thereto.

In the first embodiment of the present utility model, the explosion-proof structure 4 is further included, and the explosion-proof structure 4 is disposed on the lower case 2.

In the first embodiment of the utility model, the explosion-proof structure 4 comprises a lower T-shaped through hole 41, the explosion-proof structure 4 adopts an explosion-proof piece 42, the lower T-shaped through hole 41 is arranged at the bottom of the lower shell 2, the explosion-proof piece 42 is assembled at the position of the lower T-shaped through hole 41, the mounting step of the lower T-shaped through hole 41 plays a role of assembly limit, the explosion-proof piece 42 is welded and assembled with the lower shell 2, when the internal pressure of the battery exceeds a preset level, the pressure is pressed against the explosion-proof piece 42, and the rupture of the explosion-proof piece 42 is accelerated, so that the gas in the battery can be rapidly discharged.

In a first embodiment of the utility model, the assembly process is as follows:

and in the upper cover 1, the cover body 11, the insulating sheet 12 and the pole piece 13 are subjected to hot pressing and then are compounded to form the upper cover 1, and the cover body 11 and the pole piece 13 are in a sealed and insulating state after being compounded.

Lower case 2. Rupture disc 42 is fitted in lower T-shaped through hole 41, and rupture disc 42 is assembled with lower case 2 by welding.

The upper cover 1 is assembled with the lower shell 2, the pole core 3 is arranged in the inner cavity of the lower shell 2, and electrolyte is injected; the second lug 32 is welded with the lower shell 2, the first lug 31 is welded with the boss 132, the upper cover 1 is matched with the lower shell 2, the upper spigot 15 is matched with the side wall to form a spigot structure, and the upper cover 1 and the lower shell 2 are welded into a whole through laser welding to form a button cell with a sealing body structure; the spigot structure effectively prevents the relative eccentric displacement of the upper cover 1 and the lower shell 2, so that the spigot structure can be accurately assembled during assembly, and the spigot structure is reliable in structural performance, and effectively improves the assembly efficiency and poor welding.

In the first embodiment of the present utility model, the welding method is preferably laser welding, but other welding methods such as resistance welding and double-needle welding may be used, and the welding method is not limited thereto according to the actual situation.

Referring to fig. 10-18, a button cell with a spigot structure is provided in a second preferred embodiment of the present utility model, which includes an upper cover 1 and a lower cover 2, wherein the upper cover 1 includes a cover 11, an insulating sheet 12 and a pole piece 13, the insulating sheet 12 is disposed between the cover 11 and the pole piece 13, the insulating sheet 12 separates the cover 11 and the pole piece 13, and an installation groove 14 for installing the insulating sheet 12 is disposed on the cover 11; the bottom of the cover body 11 is provided with an upper spigot part 15, and the axial section of the upper spigot part 15 is of an inward concave L shape and comprises a first surface 151 and a second surface 152 which are connected; the lower case 2 includes a side wall 21 and a bottom wall 23, one end surface of the side wall 21 is a planar connection surface 22, and the bottom wall 23 is connected to the other end of the side wall 21. The connecting surface 22 butt in first face 151, the internal surface and the second face 152 butt of lateral wall 21 for upper tang portion 15 cooperatees with lateral wall 21 and forms the tang structure, effectively prevents upper cover and the relative eccentric displacement of inferior valve, can accurately assemble when making upper cover and inferior valve equipment, and its structural performance is reliable, effectively promotes assembly efficiency, avoids welding failure problem.

In the case of providing the upper stopper portion, in order to secure the overall strength of the upper cover 1, it is necessary to increase the thickness of the cover body 11, so that the battery height can be compressed by providing the mounting groove 14, the thickness of the entire upper cover 1 is reduced, and in the button battery of the same height, the battery energy density is improved by providing the mounting groove 14. In the axial direction of the button cell, the dimension of the second face 152 is equal to the depth of the mounting groove 14, so that the provision of the upper stop portion 15 and the mounting groove 14 does not change the overall thickness of the original upper cover 1, and the structural strength of the upper cover 1 is ensured.

In the second embodiment of the present utility model, preferably, the outer surface of the side wall 21 is aligned with the outer peripheral surface of the cover 11, so that the side surface of the button cell is smooth, and the assembly connection between the side wall 21 and the cover 11 is facilitated, and meanwhile, in the radial direction of the button cell, the size of the connecting surface 22 of the side wall 21 is equal to the size of the first surface 151, so that the firm and reliable connection at the welding position a of the upper cover and the lower case is ensured.

In the second embodiment of the present utility model, the side wall 21 and the bottom wall 23 of the lower case 2 are connected to form a cylinder shape with an opening at the top, and the axial section of the lower case 2 is in a "U" shape.

In the second embodiment of the present utility model, the upper spigot portion 15 is preferably disposed along the bottom edge of the cover 11, and the projection of the upper spigot portion 15 on the horizontal plane is annular, however, the projection of the upper spigot portion 15 on the horizontal plane may be other shapes, so long as the upper spigot portion 15 and the side wall 21 can cooperate to form a spigot structure.

In the second embodiment of the utility model, the cover 11 and the pole piece 13 are not contacted with each other, and are isolated by the insulating piece 12, and the cover 11 is insulated from the pole piece 13, so that the positive and negative poles of the battery are separated.

In the second embodiment of the present utility model, the insulating sheet 12 may be injection molded from plastic material, preferably any one of PI (collectively referred to as Po-lysine, i.e., polyimide), PP (collectively referred to as polypropylene), PS (collectively referred to as Pol ystyrene, i.e., polystyrene), and PEEK (collectively referred to as Polyether Ether Ketone, i.e., polyetheretherketone), and the insulating sheet 12 forms a battery polarity insulating and sealing function.

In the second embodiment of the present utility model, the pole piece 13 includes a panel 131 and a boss 132 connected to each other.

In the second embodiment of the present utility model, the boss 132 is disposed at the center of the panel 131, the center of the insulating sheet 12 is provided with the first through hole 16 through which the boss 132 passes, and the center of the cover 11 is provided with the second through hole 17 through which the boss 132 passes.

Because the cover 11 is insulated from the pole piece 13, the positive and negative poles of the battery are ensured to be separated, the inner diameter of the first through hole 16 is larger than or equal to the maximum outer diameter of the boss 132, and the inner diameter of the second through hole 17 is larger than the inner diameter of the first through hole 16, so that the pole piece 13 and the cover 11 are prevented from being contacted with each other.

In the second embodiment of the present utility model, the panel 131 and the boss 132 are integrally formed, and the two are firmly connected, so that the integrity is strong and the manufacturing is convenient.

In other embodiments, the panel 131 and the boss 132 may be connected by welding.

In the second embodiment of the present utility model, the mounting groove 14 is provided at the top of the cover 11, that is, the insulating sheet 12 is provided at the top of the cover 11, the bottom surface of the insulating sheet 12 abuts against the groove bottom surface of the mounting groove 14; the bottom of panel 131 supports and leans on the top of insulating piece 12, and the inner chamber of inferior valve 2 is provided with utmost point core 3, and utmost point core 3 contains first utmost point ear 31 and second utmost point ear 32, and boss 132 is protruding downwards and runs through first through-hole 16, second through-hole 17 are connected with first utmost point ear 31, and second utmost point ear 32 is connected with inferior valve 2 to boss 132 is welding conduction with first utmost point ear 31, and second utmost point ear 32 is welding conduction with inferior valve 2. The thickness of the insulating sheet 12 and the thickness of the mounting groove 14 may be the same so that the surface of the insulating sheet 12 and the surface of the cover 11 may be flush, so that the insulating sheet 12 is molded in the mounting groove 14 by injection molding.

In the second embodiment of the present utility model, the pole core 3 is used for storing electric energy, the pole core 3 transmits current to the electric device through the pole piece 13, the pole core 3 may be laminated or wound, the pole core 3 may also take other forms, according to practical situations, and the present utility model is not limited thereto.

In the second embodiment of the present utility model, the cover 11, the insulating sheet 12 and the pole piece 13 are integrally connected, and the top of the panel 131 is flush with the top of the cover 11, or the top of the panel 131 is higher than the top of the cover 11, so that the panel 131 is beneficial to supplying power to the electric equipment.

In the second embodiment of the present utility model, three parts of the cover 11, the insulating sheet 12 and the pole piece 13 may be formed by hot pressing.

In the second embodiment of the present utility model, the three parts of the cover 11, the insulating sheet 12 and the pole piece 13 may be further integrally manufactured by the following processes: 1. the pole piece 13 and the insulating piece 12 are secondarily injection-molded into an integral component, and the obtained integral component and the cover 11 are hot-pressed into a whole; 2. the cover 11 and the insulator sheet are secondarily injection-molded into an integral assembly, and the obtained integral assembly and the pole piece 13 are hot-pressed into a whole.

In the second embodiment of the present utility model, the pole piece 13 is preferably made of aluminum alloy by punching or die casting and is formed by turning.

In the second embodiment of the present utility model, the lower shell 2 is preferably formed by stamping a stainless steel material, and the lower shell 2 is formed by deep drawing and then bending the lower shell 2 so that the lower shell 2 has a U-shaped axial cross section and side walls 21 and a bottom wall 23.

In the second embodiment of the present utility model, the boss 132 is solid, so as to ensure strength, and may be formed by punching or CNC processing.

In other embodiments, a mounting groove for placing the panel 131 may be provided in the insulating sheet 12, and the depth of the mounting groove may be set to be equal to the battery energy density, the strength of the cover 11, and the strength of the insulating sheet 12. The insulating sheet 12 can ensure that the cover body and the pole piece are mutually insulated, and the mounting groove is formed in the insulating sheet 12 so as to further ensure the overall thickness of the upper cover.

In the second embodiment of the present utility model, the insulating sheet 12, the pole piece 13 and the mounting groove 14 are all annular.

In the second embodiment of the present utility model, the first through hole 16, the second through hole 17 and the mounting groove 14 are all formed by punching or CNC processing, so that the back surfaces of the cover 11 and the insulating sheet 12 are not raised, and the back surfaces of the cover 11 and the insulating sheet 12 are also flat surfaces.

In the second embodiment of the present utility model, the first through hole 16, the second through hole 17, the mounting groove 14, the cover 11, the panel 131, the boss 132 and the insulating sheet 12 are all concentrically arranged, but of course, the first through hole 16, the second through hole 17, the mounting groove 14, the cover 11, the panel 131, the boss 132 and the insulating sheet 12 may be not concentrically arranged, and the shape and the position thereof may be selected according to practical situations, and are not limited thereto.

In the second embodiment of the present utility model, the explosion-proof structure 4 is further included, and the explosion-proof structure 4 is disposed on the lower case 2.

In the second embodiment of the present utility model, the explosion-proof structure 4 adopts the explosion-proof wire 43, the explosion-proof wire 43 is disposed at the bottom of the lower case 2, the explosion-proof wire 43 is a laser carving or punching structure, when the internal pressure of the battery exceeds a predetermined level, the pressure presses the explosion-proof wire 43, and the rupture of the explosion-proof wire 43 is accelerated, thereby realizing rapid discharge of the gas in the battery.

In a second embodiment of the present utility model, the assembly process is as follows:

and in the upper cover 1, the cover body 11, the insulating sheet 12 and the pole piece 13 are subjected to hot pressing and then are compounded to form the upper cover 1, and the cover body 11 and the pole piece 13 are in a sealed and insulating state after being compounded.

The upper cover 1 is assembled with the lower shell 2, the pole core 3 is arranged in the inner cavity of the lower shell 2, and electrolyte is injected; the first tab 31 is welded with the boss 132, the second tab 32 is welded with the lower shell 2, the upper cover 1 is matched with the lower shell 2, the upper spigot 15 is matched with the side wall 21 to form a spigot structure, and the upper cover 1 and the lower shell 2 are welded into a whole through laser welding to form a button cell with a sealing body structure; the spigot structure effectively prevents the relative eccentric displacement of the upper cover 1 and the lower shell 2, so that the spigot structure can be accurately assembled during assembly, and the spigot structure is reliable in structural performance, and effectively improves the assembly efficiency and poor welding.

In the second embodiment of the present utility model, in order to facilitate welding between the first tab 31 and the boss 132, a welding process without solder may be adopted, the first tab 31 and the boss 132 are respectively in a molten state by using the height Wen Jiangdi of the laser, and at this time, the upper cover 1 and the lower shell 2 are matched together, and due to the limiting effect of the spigot structure, the molten first tab 31 is aligned to the molten boss 132; after the first tab 31 and the boss 132 are cooled, the first tab 31 is connected and conducted with the boss 132.

In the second embodiment of the present utility model, the welding method is preferably laser welding, but other welding methods such as resistance welding and double-needle welding may be used, and the welding method is not limited thereto according to the actual situation.

Referring to fig. 19-28, a button cell with a spigot structure is provided in a third preferred embodiment of the present utility model, which comprises an upper cover 1 and a lower cover 2, wherein the upper cover 1 comprises a cover 11, an insulating sheet 12 and a pole piece 13, the insulating sheet 12 is arranged between the cover 11 and the pole piece 13, the insulating sheet 12 separates the cover 11 and the pole piece 13, and an installation groove 14 for installing the insulating sheet 12 is arranged on the cover 11; the bottom of the cover body 11 is provided with an upper spigot part 15, and the axial section of the upper spigot part 15 is of an inward concave L shape and comprises a first surface 151 and a second surface 152 which are connected; the lower case 2 includes a side wall 21 and a bottom wall 23, one end surface of the side wall 21 is a planar connection surface 22, and the bottom wall 23 is connected to the other end of the side wall 21. The connecting surface 22 butt in first face 151, the internal surface and the second face 152 butt of lateral wall 21 for upper tang portion 15 cooperatees with lateral wall 21 and forms the tang structure, effectively prevents upper cover and the relative eccentric displacement of inferior valve, can accurately assemble when making upper cover and inferior valve equipment, and its structural performance is reliable, effectively promotes assembly efficiency, avoids welding failure problem.

In the case of providing the upper stopper portion, in order to secure the overall strength of the upper cover 1, it is necessary to increase the thickness of the cover body 11, so that the battery height can be compressed by providing the mounting groove 14, the thickness of the entire upper cover 1 is reduced, and in the button battery of the same height, the battery energy density is improved by providing the mounting groove 14. In the axial direction of the button cell, the dimension of the second face 152 is equal to the depth of the mounting groove 14, so that the provision of the upper stop portion 15 and the mounting groove 14 does not change the overall thickness of the original upper cover 1, and the structural strength of the upper cover 1 is ensured.

In the third embodiment of the present utility model, preferably, the outer surface of the side wall 21 is aligned with the outer peripheral surface of the cover 11, so that the side surface of the button cell is smooth, and the assembly connection between the side wall 21 and the cover 11 is facilitated, and meanwhile, in the radial direction of the button cell, the size of the connecting surface 22 of the side wall 21 is equal to the size of the first surface 151, so that the connection at the welding position a of the upper cover and the lower case is ensured to be firm and reliable. In the first embodiment of the present utility model, the side wall 21 and the bottom wall 23 of the lower case 2 are connected to form a cylinder shape with an opening at the top, and the axial section of the lower case 2 is in a "U" shape.

In the third embodiment of the present utility model, the upper spigot portion 15 is preferably disposed along the bottom edge of the cover 11, and the projection of the upper spigot portion 15 on the horizontal plane is annular, however, the projection of the upper spigot portion 15 on the horizontal plane may be other shapes, so long as the upper spigot portion 15 and the side wall 21 can cooperate to form a spigot structure.

In the third embodiment of the utility model, the cover 11 and the pole piece 13 are not contacted with each other, and are isolated by the insulating piece 12, and the cover 11 is insulated from the pole piece 13, so that the positive and negative poles of the battery are separated.

In the third embodiment of the present utility model, the insulating sheet 12 may be injection molded from plastic material, preferably any one of PI (collectively referred to as Po-lysine, i.e., polyimide), PP (collectively referred to as polypropylene), PS (collectively referred to as Pol ystyrene, i.e., polystyrene), and PEEK (collectively referred to as Polyether Ether Ketone, i.e., polyetheretherketone), and the insulating sheet 12 forms a battery polarity insulating and sealing function.

In the third embodiment of the present utility model, the pole piece 13 includes a panel 131 and a boss 132 connected to each other.

In the third embodiment of the present utility model, the boss 132 is disposed at the center of the panel 131, the center of the insulating sheet 12 is provided with the first through hole 16 through which the boss 132 passes, and the center of the cover 11 is provided with the second through hole 17 through which the boss 132 passes.

Because the cover 11 is insulated from the pole piece 13, the positive and negative poles of the battery are ensured to be separated, the inner diameter of the first through hole 16 is larger than or equal to the maximum outer diameter of the boss 132, and the inner diameter of the second through hole 17 is larger than the inner diameter of the first through hole 16, so that the pole piece 13 and the cover 11 are prevented from being contacted with each other.

In the third embodiment of the present utility model, the panel 131 and the boss 132 are integrally formed, and the two are firmly connected, so that the integrity is strong, and the manufacturing is convenient.

In other embodiments, the panel 131 and the boss 132 may be connected by welding.

In the third embodiment of the present utility model, the mounting groove 14 is provided at the bottom of the cover 11; the insulating sheet 12 is disposed in the mounting groove 14 such that the insulating sheet 12 is disposed at the bottom of the cover 11, the top surface of the insulating sheet 12 abuts against the mounting groove 14, the top of the panel 131 abuts against the bottom of the insulating sheet 12, and the boss 132 is located at the top of the panel 131, protruding upward. The inner chamber of inferior valve 2 is provided with utmost point core 3, and utmost point core 3 contains first utmost point ear 31 and second utmost point ear 32, and panel 131 is connected with first utmost point ear 31, and second utmost point ear 32 is connected with inferior valve 2 to panel 131 and first utmost point ear 31 are welding conduction, and second utmost point ear 32 and inferior valve 2 welding conduction. The thickness of the insulating sheet 12 and the thickness of the mounting groove 14 may be the same so that the surface of the insulating sheet 12 and the surface of the cover 11 may be flush, so that the insulating sheet 12 is molded in the mounting groove 14 by injection molding.

In the third embodiment of the present utility model, the pole core 3 is used for storing electric energy, the pole core 3 transmits current to the electric device through the pole piece 13, the pole core 3 may be laminated or wound, and the pole core 3 may also take other forms, according to practical situations, but is not limited thereto.

In the third embodiment of the present utility model, the cover 11, the insulating sheet 12 and the pole piece 13 are integrally connected, and the top of the boss 132 is flush with the top of the cover 11, or the top of the boss 132 is higher than the top of the cover 11, so that the boss 132 is beneficial to supplying power to the electric equipment.

In the third embodiment of the present utility model, three parts of the cover 11, the insulating sheet 12 and the pole piece 13 may be formed by hot pressing.

In the third embodiment of the present utility model, the three parts of the cover 11, the insulating sheet 12 and the pole piece 13 may be further integrally manufactured by the following processes: 1. the pole piece 13 and the insulating piece 12 are secondarily injection-molded into an integral component, and the obtained integral component and the cover 11 are hot-pressed into a whole; 2. the cover 11 and the insulator sheet are secondarily injection-molded into an integral assembly, and the obtained integral assembly and the pole piece 13 are hot-pressed into a whole.

In the third embodiment of the present utility model, the pole piece 13 is preferably made of aluminum alloy by punching or die casting and is formed by turning.

In the third embodiment of the present utility model, the lower shell 2 is preferably formed by stamping a stainless steel material, and the lower shell 2 is formed by deep drawing and then bending the lower shell 2 so that the lower shell 2 has a U-shaped axial cross section and side walls 21 and a bottom wall 23.

In the third embodiment of the present utility model, the boss 132 is solid, so as to ensure strength.

In other embodiments, a mounting groove for placing the panel 131 may be provided in the insulating sheet 12, and the depth of the mounting groove may be set to be equal to the battery energy density, the strength of the cover 11, and the strength of the insulating sheet 12.

In the third embodiment of the present utility model, the insulating sheet 12, the pole piece 13, and the mounting groove 14 are all annular.

In the third embodiment of the present utility model, the first through hole 16, the second through hole 17 and the mounting groove 14 are all formed by punching or CNC processing, so that the back surfaces of the cover 11 and the insulating sheet 12 are not raised, and the back surfaces of the cover 11 and the insulating sheet 12 are also flat surfaces.

In the third embodiment of the present utility model, the first through hole 16, the second through hole 17, the mounting groove 14, the cover 11, the panel 131, the boss 132 and the insulating sheet 12 are all concentrically arranged, but of course, the first through hole 16, the second through hole 17, the mounting groove 14, the cover 11, the panel 131, the boss 132 and the insulating sheet 12 may be not concentrically arranged, and the shape and position thereof may be selected according to practical situations, and are not limited thereto.

In the third embodiment of the present utility model, the explosion-proof structure 4 is further included, and the explosion-proof structure 4 is disposed on the upper cover 1.

In the third embodiment of the present utility model, the explosion-proof structure 4 includes an upper T-shaped through hole 44, the explosion-proof structure 4 adopts an explosion-proof sheet 42, the upper T-shaped through hole 44 is provided at the top of the cover 11, the explosion-proof sheet 42 is assembled at the upper T-shaped through hole 44, the mounting step of the upper T-shaped through hole 44 plays a role of assembly limitation, the explosion-proof sheet 42 is welded and assembled with the cover 11, and when the internal pressure of the battery exceeds a predetermined level, the pressure is pressed against the explosion-proof sheet 42, so as to accelerate the rupture of the explosion-proof sheet 42, thereby realizing rapid discharge of the gas in the battery.

In the third embodiment of the present utility model, the mounting step is D-shaped, so as to avoid the upper T-shaped through hole 44, and the insulating sheet 12 is D-shaped corresponding to the panel 131, however, the mounting step may be other shapes, so as to avoid the upper T-shaped through hole 44.

In the third embodiment of the present utility model, the assembly process is as follows:

the upper cover 1 is formed by compounding a cover body 11, an insulating sheet 12 and a pole piece 13 after hot pressing, and the cover body 11 and the pole piece 13 are in a sealed and insulating state after compounding; the rupture disc 42 is fitted into the upper T-shaped through hole 44, and the rupture disc 42 is assembled with the lower case 2 by welding.

The upper cover 1 is assembled with the lower shell 2, the pole core 3 is arranged in the inner cavity of the lower shell 2, and electrolyte is injected; the first tab 31 is welded with the panel 131, the second tab 32 is welded with the lower shell 2, the upper cover 1 is matched with the lower shell 2, the upper spigot 15 is matched with the side wall 21 to form a spigot structure, and the upper cover 1 and the lower shell 2 are welded into a whole through laser welding to form a button cell with a sealing body structure; the spigot structure effectively prevents the relative eccentric displacement of the upper cover 1 and the lower shell 2, so that the spigot structure can be accurately assembled during assembly, and the spigot structure is reliable in structural performance, and effectively improves the assembly efficiency and poor welding.

In the third embodiment of the present utility model, in order to facilitate the welding of the first tab 31 and the panel 131, a welding process without solder may be adopted, the first tab 31 in a molten state is in a molten state with the panel 131 by using the high Wen Jiangdi laser, and the upper cover 1 and the lower shell 2 are matched together at this time, and due to the limiting effect of the spigot structure, the first tab 31 in a molten state is aligned to the pole piece 13 in a molten state; after the first tab 31 and the panel 131 are cooled, the first tab 31 is connected and conducted with the panel 131.

In the third embodiment of the present utility model, the welding method is preferably laser welding, but other welding methods such as resistance welding and double-needle welding may be used, and the welding method is not limited thereto according to the actual situation.

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

Claims (10)

1. A button cell with tang structure, its characterized in that: the insulation piece is arranged between the cover body and the pole piece, the insulation piece separates the cover body from the pole piece, and the cover body is provided with an installation groove for installing the insulation piece;

the bottom of the cover body is provided with an upper spigot part, the axial section of the upper spigot part is of an inward concave L shape, and the upper spigot part comprises a first surface and a second surface which are connected;

the lower shell comprises a side wall and a bottom wall, one end face of the side wall is a planar connecting face, the connecting face is abutted to the first face, the inner surface of the side wall is abutted to the second face, and the bottom wall is connected with the other end of the side wall.

2. The button cell having a spigot structure according to claim 1, wherein: the outer surface of the side wall is aligned with the outer peripheral surface of the cover.

3. The button cell having a spigot structure according to claim 1, wherein: the pole piece comprises a panel and a boss which are connected with each other; the boss is arranged at the center of the panel, a first through hole used for the boss to pass through is arranged at the center of the insulating sheet, and a second through hole used for the boss to pass through is arranged at the center of the cover body.

4. The button cell having a spigot structure according to claim 3, wherein: the mounting groove is arranged at the top of the cover body;

the bottom of panel supports and leans on the top of insulating piece, the inner chamber of inferior valve is provided with the utmost point core, the utmost point core contains first utmost point ear and second utmost point ear, the boss runs through first through-hole the second through-hole with first utmost point ear is connected, the second utmost point ear with the inferior valve is connected.

5. The button cell having a spigot structure according to claim 4, wherein: the cover body, the insulating sheet and the pole piece are connected into a whole, the top of the panel is flush with the top of the cover body, or the top of the panel is higher than the top of the cover body.

6. The button cell having a spigot structure according to claim 3, wherein: the mounting groove is arranged at the bottom of the cover body;

the top of panel supports and leans on the bottom of insulating piece, the inner chamber of inferior valve is provided with the utmost point core, the utmost point core contains first utmost point ear and second utmost point ear, the panel with first utmost point ear is connected, the second utmost point ear with the inferior valve is connected.

7. The button cell having a spigot structure according to claim 6, wherein: the cover body, the insulating sheet and the pole piece are connected into a whole, the top of the boss is flush with the top of the cover body, or the top of the boss is higher than the top of the cover body.

8. The button cell having a spigot structure according to any one of claims 3 to 7, wherein: the boss is shell-shaped.

9. The button cell having a spigot structure according to any one of claims 3 to 7, wherein: the boss is solid.

10. The button cell having a spigot structure according to any one of claims 3 to 7, wherein: the insulating sheet is provided with a mounting groove for placing the panel.