CN111952487A

CN111952487A - Button cell

Info

Publication number: CN111952487A
Application number: CN202010948113.XA
Authority: CN
Inventors: 戈志敏; 肖海燕; 顾勇平; 王永伟; 刘晓伟; 简文龙; 余小旦; 吕荣喜; 李阳; 艾清; 刘祥郡; 祝洪根; 董水金
Original assignee: Xinyu Ganfeng Electronics Co Ltd
Current assignee: Xinyu Ganfeng Electronics Co Ltd
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2020-11-17

Abstract

The invention discloses a novel button cell, which comprises a roll core and a shell, and is characterized in that a limiting ring with an inward-turned upper part is sleeved outside the roll core, and the outer wall of one side of the limiting ring, which is far away from the roll core, is fixedly connected with the inner wall of the shell; the upper end face and the outer surface of the winding core are abutted to the side wall of the limiting ring, and the lower end face of the winding core is abutted to the bottom of the shell. At casing internal fixation connection spacing ring, through the butt ring that spacing ring upper portion set up with roll up the core butt, can realize the fixed of rolling up the core, carry out the punching press formation to the upper portion of casing and buckle the blank holder for prior art, carry out the fixed mode of joint through buckleing the blank holder to rolling up the core, can reduce the sealed equipment complexity of button cell to reduction in production cost's effect has been realized.

Description

Button cell

Technical Field

The invention belongs to the field of batteries, and particularly relates to a novel button battery.

Background

With the increasing development of electronic products, button cells are widely used in various miniature electronic products due to their lightness and smallness, and are mainly used as backup power sources for various electronic products, such as computer motherboards, electronic watches, electronic dictionaries, electronic scales, memory cards, remote controllers, CPC cards, electronic display screens, and the like, and the requirements of people on button cells are increasing. Button cells are not only portable, but also require ultra-high capacity and service life, and therefore new button cells are developed to meet market demands.

The existing button cell has the following problems: when the button cell is assembled in a sealing manner, the upper part of the shell is usually required to be punched inwards along the vertical axis direction of the shell to form a fastening edge for fixing a winding core in the shell, so that the button cell is complex in sealing assembly and high in production cost; and after the button cell is short-circuited, the cell can burn due to heat, and the like.

Disclosure of Invention

In view of the above, the main object of the present invention is to provide a novel button cell which is easy to assemble and avoids the heat burning of the cell.

The invention provides a novel button cell, which comprises a winding core and a shell, and is characterized in that a limiting ring with an inward-turned upper part is sleeved outside the winding core, and the outer wall of one side of the limiting ring, which is far away from the winding core, is fixedly connected with the inner wall of the shell; the upper end face and the outer surface of the winding core are abutted to the side wall of the limiting ring, and the lower end face of the winding core is abutted to the bottom of the shell.

The upper portion of the optimized shell is inwards turned to form a check ring, a face cover body and a sealing ring are arranged between the limiting ring and the check ring, an accommodating groove is formed in the sealing ring, and the periphery of the face cover body extends into the sealing ring.

Preferably, the face cover body comprises a connecting cover plate and a cap body, the connecting cover plate is fixedly connected with the cap body, and one end, far away from the cap body, of the connecting cover plate extends into the accommodating cavity.

Preferably, the button cell further comprises a PTC sheet, the PTC sheet is fixed on the lower end face of the cap body, and the PTC sheet is connected with the winding core.

Preferably, a sealing platen is arranged at the upper part of the connecting cover plate, an insertion slot is arranged between the connecting cover plate and the sealing platen, and when the connecting cover plate extends into the accommodating cavity to the bottom, the upper part of the sealing ring is inserted into the insertion slot.

Preferably, the connecting cover plate and the cap body are of an integrally formed structure.

Preferably, the upper part and the lower part of the winding core are both provided with tabs, the lower tab is connected with the shell, and the upper tab is connected with the PTC sheet.

Preferably, the outer walls of the shell and the face cover body are provided with non-metal film layers.

Preferably, the sealing ring is made of elastic materials.

The button cell provided by the invention has the following beneficial effects:

1. at casing internal fixation connection spacing ring, through the butt ring that spacing ring upper portion set up with roll up the core butt, can realize the fixed of rolling up the core, carry out the punching press formation to the upper portion of casing and buckle the blank holder for prior art, carry out the fixed mode of joint through buckleing the blank holder to rolling up the core, can reduce the sealed equipment complexity of button cell to reduction in production cost's effect has been realized.

2. The PTC sheet is added in the shell, when the battery is internally short-circuited due to reasons such as external force, the internal resistance of the PTC sheet is increased along with the temperature rise, and therefore the effect of isolating current to protect the battery is achieved.

3. Because the shell and the face cover which are made of metal materials are subjected to vacuum plating of the non-metal film, the situation that the shell is not corroded when the battery works can be ensured, and therefore the battery not only can be used as a high-voltage version with the nominal voltage of 3.7V, but also can be used as a high-voltage version with the nominal voltage of 3.8V or 3.85V.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is an overall structural diagram of a button cell provided in an embodiment of the invention;

fig. 2 is an exploded view of a button cell according to an embodiment of the present invention;

fig. 3 is a cross-sectional structural diagram of a button cell according to an embodiment of the present invention;

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

fig. 5 is an enlarged view of fig. 3 at B.

Wherein the figures include the following reference numerals:

10. a housing; 11. a limiting ring; 1101. a butting ring; 12. a seal ring; 1201. a containing groove; 13. a retainer ring; 20. a face cover body; 21. connecting the cover plate; 2101. sealing the platen; 22. a cap body; 30. a winding core; 31. a tab; 40. a PTC sheet.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, it shows an overall structure diagram of an embodiment of the novel button cell of the present application, which can be applied to a TWS (true wireless stereo) headset.

Referring to fig. 2, a novel button cell battery of the present application is shown, which includes: the structure comprises a shell 10, wherein a limiting ring 11 is welded in the shell 10, and the upper part of the limiting ring 11 extends inwards along the direction vertical to the vertical axis of the limiting ring 11 to form an abutting ring 1101; the winding core 30 is disposed in the middle of the limiting ring 11, the upper end face of the winding core 30 abuts against the lower end face of the abutting ring 1101, and the lower end face of the winding core 30 abuts against the inner wall of the housing 10.

Use the technical scheme of this embodiment, adopt at the inside weld spacing ring 11 of casing 10, the butt circle 1101 that sets up through 11 upper portions of spacing ring and roll up core 30 butt can realize the fixed of rolling up core 30, for need carry out the punching press formation to the upper portion of casing 10 among the prior art and detain the blank pressing, carry out the fixed mode of joint through detaining the blank pressing to rolling up core 30, can reduce the sealed equipment complexity of button cell to reduction in production cost's effect has been realized.

Specifically, the outer walls of the shell 10 and the face cover body 20 are provided with non-metal film layers. Thus, the casing 10 and the face cover 20 both made of metal are vacuum-plated with non-metal films, so that the battery can not corrode a shell when working, and the battery can be used for not only nominal voltage of 3.7V, but also high voltage versions with nominal voltage of 3.8V and 3.85V.

Referring to fig. 3, the upper portion of the housing 10 extends inward in a direction perpendicular to the vertical axis of the housing 10 to form a retainer ring 13; a seal ring 12 is arranged between the retainer ring 13 and the abutting ring 1101, the upper end surface of the seal ring 12 abuts against the lower end surface of the retainer ring 13, and the lower end surface of the seal ring 12 abuts against the upper end surface of the abutting ring 1101; the middle part of the sealing ring 12 is provided with a surface cover body 20, and the surface cover body 20 partially extends into the accommodating groove 1201 of the sealing ring 12.

In this structural design, the seal ring 12 is provided between the retainer ring 13 and the abutment ring 1101, the upper portion of the seal ring 12 abuts against the retainer ring 13, the lower portion of the seal ring 12 abuts against the abutment ring 1101, and the middle portion is fixed to the face cover body 20 by adhesive, thereby realizing the sealed assembly of the housing 10.

Preferably, the seal ring 12 is made of an elastic material.

In a preferred embodiment, the sealing ring 12 is made of silicone. Thus, the seal ring 12 can separate the case 10 from the surface cover body 20, and thus, an insulating function can be achieved.

In another preferred embodiment, the sealing ring 12 is made of TPU.

Referring further to fig. 3, the button cell further includes a PTC sheet 40, the PTC sheet 40 is fixed on the lower end surface of the cap body 22, and the PTC sheet 40 is connected to the winding core 30.

Specifically, tabs 31 are provided on both the upper and lower portions of the winding core 30, the lower tab 31 is connected to the case 10, and the upper tab 31 is connected to the PTC sheet 40.

According to the structural design, the upper part and the lower part of the winding core 30 are both provided with the tabs 31, the tabs 31 at the lower part are welded with the shell 10, the tabs 31 at the upper part are welded on the PTC sheets 40 and are connected with the surface cover 20, the PTC sheets 40 are additionally arranged inside the battery, when the short circuit is caused by external force and other reasons inside the battery, the internal resistance of the PTC sheet positive temperature coefficient thermistor is increased along with the temperature rise, and therefore the effect of isolating current to protect the battery is achieved.

Further referring to fig. 3, the surface cover body 20 includes a connecting cover plate 21 and a cap 22, the connecting cover plate 21 is fixedly connected to the cap 22, and an end of the connecting cover plate 21 away from the cap 22 extends into the accommodating cavity 1201.

Specifically, the connecting cover plate 21 and the cap body 22 are integrally formed. Thus, the sealing effect of the button cell is improved.

Referring to fig. 4, the outer wall of the winding core 30 abuts against the inner wall of the limiting ring 11, and the outer wall of the limiting ring 11 abuts against the inner wall of the housing 10. In this way, it is achieved that the winding core 30 can be stably placed in the case 10.

Referring to fig. 5, a sealing platen 2101 is disposed on an upper portion of the connecting cover 21, a slot is disposed between the connecting cover 21 and the sealing platen 2101, and when the connecting cover 21 extends into the accommodating chamber 1201 to the bottom, an upper portion of the sealing ring 12 is inserted into the slot. In this way, the sealing platen 2101 is arranged at the joint of the connecting cover plate 21 and the sealing ring 12, the connecting cover plate 21 is inserted into the accommodating cavity 1201 of the sealing ring 12, the upper part of the sealing ring 12 is inserted into the slot formed by the connecting cover plate 21 and the sealing platen 2101, and the connecting cover plate 21 and the sealing ring 12 are in cross contact, so that the sealing performance of the joint of the connecting cover plate 21 and the sealing ring 12 is improved.

In another embodiment, the outer walls of the shell 10 and the face cover body 20 are covered with non-metal film layers, the winding core 30 is disposed between the face cover body 20 and the shell 10, the tab 31 at the upper part of the winding core 30 is welded to the face cover body 20, and the tab 31 at the lower part of the winding core 30 is welded to the bottom wall of the shell 10. Like this, the adoption covers the non-metallic film layer of non-conducting material on the outer wall of casing 10 and face lid body 20, can realize when reducing the setting of sealing washer 12 for casing 10, roll up core 30 and face lid body 20 can switch on, thereby has promoted the volume that core 30 was placed in casing 10.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a novel button cell, button cell is including rolling up core (30) and casing (10), its characterized in that, roll up core (30) outside cover and be equipped with upper portion enstrophe spacing ring (11), spacing ring (11) are kept away from the outer wall and casing (10) inner wall fixed connection of rolling up core one side, wherein, roll up the lateral wall butt of core (30) up end, surface and spacing ring (11), roll up terminal surface and casing (10) bottom butt under core (30).

2. The novel button cell battery as claimed in claim 1, wherein the upper part of the casing is turned inwards to form a retainer ring (13), a face cover body (20) and a seal ring (12) are arranged between the limiting ring (11) and the retainer ring (13), the seal ring (12) is provided with a containing groove (1201), and the periphery of the face cover body (20) extends into the seal ring (12).

3. The novel button cell battery as claimed in claim 2, wherein the face cover body (20) comprises a connecting cover plate (21) and a cap body (22), the connecting cover plate (21) is fixedly connected with the cap body (22), and one end of the connecting cover plate (21) far away from the cap body (22) extends into the accommodating cavity (1201).

4. The novel button cell battery according to claim 3, characterized in that the button cell battery further comprises a PTC sheet (40), the PTC sheet (40) is fixed on the lower end face of the cap body (22), and the PTC sheet (40) is connected with the winding core (30).

5. A novel button cell battery as claimed in claim 3, characterized in that the upper part of the connecting cover plate (21) is provided with a sealing platen (2101), a slot is provided between the connecting cover plate (21) and the sealing platen (2101), and when the connecting cover plate (21) is inserted into the bottom of the accommodating cavity (1201), the upper part of the sealing ring (12) is inserted into the slot.

6. The button cell battery according to claim 3, wherein the connecting cover plate (21) and the cap body (22) are of an integral structure.

7. The button cell battery as claimed in claim 4, characterized in that the winding core (30) is provided with tabs (31) at the upper and lower parts, the lower tab (31) is connected with the shell (10), and the upper tab (31) is connected with the PTC sheet (40).

8. The button cell battery according to claim 2, characterized in that the outer walls of the casing (10) and the face cover body (20) are provided with non-metal film layers.

9. The button cell according to claim 1, characterized in that the sealing ring (12) is made of elastic material.