CN220172248U - Button cell facilitating assembly - Google Patents

Abstract

The utility model provides a button cell which is beneficial to assembly, comprising an upper cover and a lower shell, wherein the upper cover comprises a cover body, at least one section of spigot concave part is arranged on the cover body, an inner R angle is formed at the position of the spigot concave part on the bottom plane of the cover body, the lower shell comprises a side wall, and an outer chamfer matched with the inner R angle is arranged at one side of a port of the side wall close to the inner R angle; the upper cover is assembled with the lower shell, and the outer chamfer is abutted against the matched inner R angle to form a spigot structure. The spigot structure can prevent the upper cover and the lower shell from being assembled and misplaced, can effectively prevent the eccentric and displacement phenomena of the upper cover caused by external factors during welding, and effectively solves the problems of empty welding, welding slag splashing inside and poor finished product liquid leakage during the current welding.

Description

Button cell facilitating assembly

Technical Field

The utility model relates to the field of batteries, in particular to a button battery beneficial to assembly.

Background

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

Disclosure of Invention

The utility model provides a button cell which is beneficial to assembly, can prevent the assembly dislocation phenomenon of an upper cover and a lower shell, can effectively prevent the eccentric displacement phenomenon of the upper cover caused by external factors during welding, and effectively solves the problems of empty welding, welding slag splashing inside and finished product liquid leakage during the current welding.

The technical scheme of the utility model is as follows: the button cell comprises an upper cover and a lower shell, wherein the upper cover comprises a cover body, at least one section of spigot concave part is arranged on the cover body, an inner R angle is formed on the bottom plane of the cover body at the position of the spigot concave part, the lower shell comprises a side wall, and an outer chamfer matched with the inner R angle is arranged on one side of a port of the side wall close to the inner R angle; the upper cover is assembled with the lower shell, and the outer chamfer is abutted against the matched inner R angle to form a spigot structure.

Further, the axial section of the spigot concave part is arc-shaped and protrudes toward the lower shell.

Further, the spigot recess is one segment and is annular.

Further, the spigot concave parts are multi-section, and each section of spigot concave parts are long-strip-shaped and are arranged at intervals.

Further, the spigot recess is press-formed from the cover.

Further, the upper cover further comprises an insulating sheet and a pole piece, the insulating sheet is arranged between the bottom surface of the cover body and the pole piece, and the insulating sheet separates the cover body and the pole piece.

Further, the pole piece contains interconnect's panel and boss, is provided with the first through-hole that is used for the boss to pass on the insulating piece, is provided with the second through-hole that is used for the boss to pass on the lid.

Further, lid, insulating piece and pole piece connect as an organic wholely, and the top of lid is parallel and level mutually with the top of boss, or the top of boss is higher than the top of lid.

Further, the inner cavity of the lower shell is provided with a pole core, the pole core comprises a first pole lug and a second pole lug, the first pole lug is connected with the panel, and the second pole lug is connected with the lower shell.

Further, the explosion-proof structure is arranged on the lower shell.

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

1. through the tang structure assembly limiting displacement that outer chamfer and interior R angle formed, played and prevented upper cover and inferior valve assembly dislocation, can accurate equipment when upper cover and inferior valve are assembled, can effectively prevent the external factor to arouse the emergence of the eccentric, the displacement phenomenon of upper cover during the welding, effectively solved empty welding, welding slag splash inside and the finished product weeping bad problem that appear when current welding, make its efficiency promote greatly when welding with the inferior valve.

2. The spigot structure is simple in forming process, the assembly efficiency and assembly are effectively improved, poor welding phenomenon is caused, and the assembly-oriented design in the structural design concept is presented.

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 view illustrating an internal structure of a button cell for facilitating assembly according to an embodiment of the present utility model.

Fig. 2 is a schematic view illustrating an internal structure of a button cell for facilitating assembly according to an embodiment of the present utility model.

Fig. 3 is a schematic view illustrating an internal structure of a button cell for facilitating assembly according to an embodiment of the present utility model.

Fig. 4 is an enlarged schematic diagram at a in fig. 3 according to an embodiment of the present utility model.

Fig. 5 is a schematic view showing an external structure of a button cell facilitating assembly according to an embodiment of the present utility model.

Fig. 6 is a schematic view showing an external structure of a button cell facilitating assembly according to an embodiment of the present utility model.

Fig. 7 is an overall exploded view of a button cell assembly facilitating assembly according to an embodiment of the present utility model.

Fig. 8 is an exploded view of an upper cover of a button cell for facilitating assembly according to an embodiment of the present utility model.

Fig. 9 is a schematic view of an upper cover structure of a button cell that facilitates assembly according to an embodiment of the present utility model.

1-upper cover, 11-cover body, 12-spigot concave part, 13-inner R angle, 14-insulating sheet, 15-pole piece, 151-panel, 152-boss, 16-first through hole, 17-second through hole.

2-lower shell, 21-side wall, 22-outer chamfer.

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

4-explosion-proof structure.

a-welding position of the upper cover 1 and the lower case 2.

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 for facilitating assembly is provided in a preferred embodiment of the present utility model, which comprises an upper cover 1 and a lower case 2, wherein the upper cover 1 comprises a cover 11, at least one seam allowance recess 12 is provided on the cover 11, a bottom plane of the cover 11 forms an inner R angle 13 at the position of the seam allowance recess 12, the lower case 2 comprises a side wall 21, and a port of the side wall 21 has an outer chamfer 22 matched with the inner R angle 13 at one side close to the inner R angle 13; the upper cover 1 is assembled with the lower shell 2, and the outer chamfer 22 is abutted against the matched inner R angle 13 to form a spigot structure.

Preferably, the outer chamfer 22 is provided on the outside of the side wall 21, and the inner R-angle 13 near the edge of the cover 11 mates with the outer chamfer 22.

In the embodiment of the utility model, the inner R angle 13 is naturally generated by the plane transition position of the spigot concave part 12 and the cover body 11, the outer chamfer 22 can avoid the interference of the inner R angle 13, and the assembly limiting effect can be achieved between the two, so that the assembly dislocation phenomenon of the upper cover 1 and the lower shell 2 is prevented, the upper cover 1 and the lower shell 2 can be accurately assembled during the assembly, the eccentric and displacement of the upper cover 1 caused by external factors can be effectively prevented during the welding, the problems of empty welding, welding slag splashing inside and poor finished product liquid leakage during the current welding are effectively solved, the efficiency is greatly improved during the welding with the lower shell 2, and the 'assembly-oriented design' in the structural design concept is presented.

In the embodiment of the utility model, the lower shell 2 is cylindrical with an opening at the top, and when the upper cover 1 is assembled with the lower shell 2, the upper cover 1 is installed at the opening at the top of the lower shell 2.

At least one side of the port of the side wall 21 of the lower shell 2 is provided with an outer chamfer 22, and the port of the side wall 21 of the lower shell 2 can also be provided with a round corner structure which is matched with the inner R angle 13.

In the embodiment of the present utility model, the axial cross section of the spigot recess 12 is arc-shaped and is convex toward the lower case 2 for press molding.

In the embodiment of the present utility model, the spigot recess 12 is multi-stage, and each of the spigot recesses 12 is elongated and arranged at intervals.

Preferably, the spigot recess 12 has three sections, and is uniformly arranged on the cover 11.

In other embodiments, the tang recess 12 is one segment and annular, with the tang recess 12 preferably being annular end to end.

In other embodiments, the spigot recess 12 may be two or four, and the number of spigot recesses 12 is determined according to the actual processing requirement, but is not limited thereto; all the spigot recesses 12 are arranged on the cover 11, all the spigot recesses 12 are concentrically arranged, all the spigot recesses 12 can be arranged at equal intervals and equal angles, and the intervals and angles between all the spigot recesses 12 can be different according to practical situations, and the utility model is not limited to this.

In the embodiment of the present utility model, the arrangement track of the spigot recess 12 is determined according to the projection shape of the side wall 21 of the lower case 2 on the plane, and the arrangement track of the spigot recess 12 may be circular, square, or irregular, so that the spigot recess 12 may be matched with the corresponding side wall 21, and the upper cover 1 may be matched with the lower case 2.

In the embodiment of the utility model, the spigot recess 12 is arranged near the edge of the upper cover 1, so that the energy density of the battery is improved.

In the embodiment of the utility model, the spigot recess 12 is stamped and formed from the cover 11.

In the embodiment of the utility model, the upper cover 1 further comprises an insulating sheet 14 and a pole piece 15, the insulating sheet 14 is arranged between the bottom surface of the cover body 11 and the pole piece 15, the insulating sheet 14 separates the cover body 11 and the pole piece 15, and the cover body 11 is insulated from the pole piece 15, so that the positive electrode and the negative electrode of the battery are separated.

In the embodiment of the utility model, the cover 11, the insulating sheet 14 and the pole piece 15 are connected into a whole, the top of the cover 11 is flush with the top of the boss 152, or the top of the boss 152 is higher than the top of the cover 11, so that the pole piece 15 is connected with electric equipment, and power is supplied to the electric equipment.

In the embodiment of the utility model, the pole piece 15 comprises a panel 151 and a boss 152 which are connected with each other, the insulating piece 14 is provided with a first through hole 16 for the boss 152 to pass through, and the cover 11 is provided with a second through hole 17 for the boss 152 to pass through.

In the embodiment of the utility model, since the cover 11 is insulated from the pole piece 15, 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 152, 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 15 and the cover 11 are prevented from being contacted with each other.

In this embodiment, the panel 151 and the boss 152 are integrally formed, and the connection between them is firm and the integrity is strong.

In other embodiments, the panel 151 and the boss 152 may be welded together for easy manufacture.

In the embodiment of the present utility model, the outer diameter of the panel 151 is larger than the outer diameter of the boss 152, and the arrangement of the panel 151 and the boss 152 facilitates the connection of the pole piece 15 and the insulating piece 14.

In the embodiment of the present utility model, the shape of the boss 152 is cylindrical, however, the shape of the boss 152 may also be frustum-shaped, and the shape of the boss 152 is selected according to practical situations based on conductive connection.

In the embodiment of the utility model, a pole core 3 is arranged in an inner cavity of the lower shell 2, the pole core 3 comprises a first pole lug 31 and a second pole lug 32, the first pole lug 31 is connected with the panel 151, and the second pole lug 32 is connected with the lower shell 2; the first tab 31 is welded to the panel 151, and the second tab 32 is welded to the lower case 2.

In the embodiment of the present utility model, the pole core 3 is used for storing electric energy, the pole core 3 may be a laminated type or a wound type, and the pole core 3 may take other forms according to practical situations, but is not limited thereto.

In the embodiment of the present utility model, the insulating sheet 14 may be injection molded from plastic material, preferably any one of PI (Polyimide), PP (polypropylene), PS (Polystyrene), and PEEK (Polyether Ether Ketone ), and the insulating sheet 14 performs the battery polarity insulation and sealing function.

In the embodiment of the present utility model, three parts of the cover 11, the insulating sheet 14 and the pole piece 15 may be formed by hot pressing.

The cover 11, the insulating sheet 14 and the pole piece 15 can be integrally connected by the following processes: 1. the pole piece 15 and the insulating piece 14 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 15 are hot-pressed into a whole.

In the embodiment of the utility model, the pole piece 15 is preferably made of aluminum alloy by punching or die casting and is formed by turning.

In the embodiment of the present utility model, the lower shell 2 is preferably formed by stamping stainless steel, the lower shell 2 is formed by deep drawing and then is bent to form the side wall 21 of the lower shell 2 in a "U" shape in cross section.

In other embodiments, in order to increase the battery energy density, the cover 11 is provided with a first mounting step for placing the insulating sheet 14, and the insulating sheet 14 is provided with a second mounting step for placing the panel 151 of the pole piece 15; the depth of the first mounting step is adapted to the thickness of the cover 11, the thickness of the insulating sheet 14 and the thickness of the panel 151 of the pole piece 15, so as not to affect the strength of the cover 11, the insulating sheet 14 and the pole piece 15; the depth of the second mounting step is adapted to the thickness of the insulating sheet 14 and the panel 151 of the pole piece 15, so long as the strength of the insulating sheet 14 and the pole piece 15 is not affected.

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

In the embodiment of the present utility model, the insulating sheet 14 and the pole piece 15 are both annular.

In the embodiment of the present utility model, the first through hole 16, the second through hole 17, the first mounting step, the second mounting step, the cover 11, the panel 151, the boss 152, and the insulating sheet 14 are all concentrically arranged, and the first through hole 16 and the second through hole 17 are arranged at the center of the upper cover 1; of course, the first through hole 16, the second through hole 17, the first mounting step, the second mounting step, the cover 11, the panel 151, the boss 152, and the insulating sheet 14 may be disposed in different concentric shapes, and the shape and position thereof may be selected according to the actual situation, and are not limited thereto.

In the embodiment of the utility model, the explosion-proof structure 4 is further included, and the explosion-proof structure 4 is arranged on the lower shell 2.

In the embodiment of the utility model, an explosion-proof wire is adopted: when the internal pressure of the battery exceeds a preset level, the pressure presses the explosion-proof line to accelerate the disconnection of the explosion-proof line, thereby realizing rapid discharge of the gas in the battery.

In other embodiments, a pressure relief valve is used: when the internal short circuit or overcharge of the battery and other anomalies occur, air pressure is generated inside the battery, the air pressure is continuously increased, the pressure release valve is broken, and the internal air of the battery is released from the pressure release valve after explosion prevention, so that the explosion prevention effect is achieved.

In the embodiment of the present utility model, the assembly process of the upper cover 1 and the lower case 2 is as follows: the pole core 3 is arranged in the inner cavity of the lower shell 2 and is filled with electrolyte; the cover 11, the insulating sheet 14 and the pole piece 15 are hot-pressed into a whole, the second lug 32 is welded with the lower shell 2, the first lug 31 is welded with the pole piece 15, the upper cover 1 and the lower shell 2 which are hot-pressed into a whole are matched together, and at the moment, the outer chamfer 22 is abutted against the matched inner R angle 13 to form a spigot structure; finally, the joint of the upper cover 1 and the lower shell 2 is welded, and the upper cover 1 and the lower shell 2 are welded into a whole 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 upper cover and the lower shell can be accurately assembled during assembly, the structural performance is reliable, and the assembly efficiency and poor welding are effectively improved.

In the embodiment of the utility model, in order to facilitate the welding of the first tab 31 and the pole piece 15, a welding process without solder can be adopted, the tab 31 and the panel 151 are respectively in a molten state by utilizing the height Wen Jiangdi of laser, and at the moment, the upper cover 1 and the lower shell 2 are matched together, and the molten state first tab 31 is aligned with the molten state panel 151 due to the limit effect of the spigot structure; after the first tab 31 and the panel 151 are cooled, the first tab 31 is connected to and conducted with the panel 151.

In the embodiment of the utility model, the welding mode is preferably laser welding, other welding modes such as resistance welding, double-needle welding and the like can be adopted, and the welding mode is not limited to the welding mode 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 facilitating assembly, characterized by: the upper cover comprises a cover body, at least one section of spigot concave part is arranged on the cover body, an inner R angle is formed on the bottom plane of the cover body at the position of the spigot concave part, the lower shell comprises a side wall, and an outer chamfer matched with the inner R angle is arranged on one side of a port of the side wall close to the inner R angle;

the upper cover is assembled with the lower shell, and the outer chamfer is abutted against the matched inner R angle to form a spigot structure.

2. The assembled button cell battery of claim 1, wherein: the axial section of the spigot concave part is arc-shaped and protrudes towards the direction of the lower shell.

3. The assembled button cell battery of claim 1, wherein: the spigot recess is one section and is annular.

4. The assembled button cell battery of claim 1, wherein: the spigot concave parts are multi-section, and each section of spigot concave parts are long-strip-shaped and are arranged at intervals.

5. The assembled button cell battery of claim 1, wherein: the spigot concave part is formed by stamping the cover body.

6. The assembled button cell battery of claim 1, wherein: the upper cover also comprises an insulating sheet and a pole piece, wherein the insulating sheet is arranged between the bottom surface of the cover body and the pole piece, and the insulating sheet separates the cover body and the pole piece.

7. The assembled button cell battery of claim 6, wherein: the pole piece comprises a panel and a boss which are connected with each other, a first through hole used for the boss to pass through is formed in the insulating piece, and a second through hole used for the boss to pass through is formed in the cover body.

8. The assembled facilitating button cell battery of claim 7, wherein:

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

9. The assembled facilitating button cell battery of claim 8, wherein: the inner cavity of the lower shell is provided with a pole core, the pole core comprises a first pole lug and a second pole lug, the first pole lug is connected with the panel, and the second pole lug is connected with the lower shell.

10. The assembled button cell battery of claim 1, wherein: the explosion-proof structure is arranged on the lower shell.