CN216750102U

CN216750102U - Button cell that leakproofness is good

Info

Publication number: CN216750102U
Application number: CN202122741568.7U
Authority: CN
Inventors: 周显茂; 赵裕锋
Original assignee: Guangdong Vdl New Energy Co ltd
Current assignee: Guangdong Vdl New Energy Co ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-06-14
Anticipated expiration: 2031-11-10

Abstract

The utility model provides a button cell with good sealing performance, which comprises an upper cover, a lower cover, a negative terminal and an adhesive film; the upper end of the upper cover is provided with a yielding hole; the negative terminal comprises a contact end and a support end; the contact end is arranged in the middle of the support end, is matched with the abdicating hole and extends upwards from part of the abdicating hole; the supporting end is positioned right below the upper cover, and the upper end of the supporting end is bonded with the lower end of the upper cover through the adhesive film; a first dispensing area is formed in an area between the upper end surface of the support end close to the contact end and the corresponding abdicating hole and the contact end; a first glue layer is arranged in the first glue dispensing area; the first adhesive layer is bonded with the contact end, the support end and the adhesive film around the first adhesive layer. The utility model can reduce the probability of the failure of the button battery in sealing, has good sealing property, can prolong the service life of the button battery and improve the quality of the finished product of the button battery.

Description

Button cell that leakproofness is good

Technical Field

The utility model belongs to the technical field of batteries, and particularly relates to a button battery with good sealing performance.

Background

The button cell is also called button cell, and refers to a cell with the external dimension like a small button, generally speaking, the diameter is larger, the thickness is thinner (compared with the columnar cell such as the cell with the number 5 AA on the market), the button cell is named by distinguishing the cell from the external shape, and the equivalent corresponding cell is classified into the columnar cell, the square cell and the like.

At present, button batteries manufactured by adopting the traditional mechanical pressing packaging process or the annular periphery welding process of the upper cover and the lower cover have the probability of sealing failure at the joint of the positive cover and the negative cover or the positive terminal and the negative terminal, so that the button batteries are corroded, rusted and functionally failed.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides the button cell with good sealing performance, which can reduce the probability of the sealing failure of the button cell, has good sealing performance, can prolong the service life of the button cell and improve the quality of the finished product of the button cell.

The utility model provides a button cell with good sealing performance, which comprises an upper cover, a lower cover and a negative terminal, wherein the upper cover is provided with a first opening; also comprises an adhesive film;

the upper end of the upper cover is provided with a yielding hole;

the negative terminal comprises a contact end and a support end;

the contact end is arranged in the middle of the support end, is matched with the abdicating hole and extends upwards from part of the abdicating hole;

the supporting end is positioned right below the upper cover, and the upper end of the supporting end is bonded with the lower end of the upper cover through the adhesive film;

a first dispensing area is formed in an area between the upper end surface of the support end close to the contact end and the corresponding abdicating hole and the contact end;

a first glue layer is arranged in the first glue dispensing area;

the first adhesive layer is bonded with the contact end, the support end and the adhesive film around the first adhesive layer.

In the above technical solution, the present invention may be further modified as follows.

The preferable technical scheme is characterized in that: and a second dispensing area is formed by the side end face of the support end far away from the contact end and the lower end of the corresponding upper cover, a second adhesive layer is arranged in the second dispensing area, and the second adhesive layer is bonded with the contact end, the support end and the adhesive film around the second adhesive layer.

The preferable technical scheme is characterized in that: the upper cover cartridge is in the lower cover, the upper end ring of upper cover is equipped with annular first kink, the upper end of lower cover is equipped with the second kink, the second kink with the direction of buckling of first kink is the same, the lateral wall of upper cover with be equipped with the sealing washer between the inside wall of lower cover, follow the upper end of sealing washer stretch out between first kink and the second kink.

The preferable technical scheme is characterized in that: and a third glue area is formed between the upper end of the first bent part and the upper end of the second bent part and the sealing ring, and a third glue layer is arranged in the third glue area.

The utility model has the beneficial effects that: the utility model can avoid the occurrence of packaging failure of the button cell manufactured by the annular periphery welding process of the upper cover and the lower cover or the joint of the upper cover and the negative terminal in the traditional mechanical pressing packaging process, improve the durability and reliability of the button cell and prolong the service life of the button cell.

Drawings

In order to more clearly illustrate the detailed description of the utility model or the technical solutions in the prior art, the drawings that are needed in the detailed description of the utility model or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic diagram illustrating bonding between an upper cover and a negative terminal of a button cell with good sealing performance according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of bonding an upper cover and a lower cover of a button cell with good sealing performance according to an embodiment of the utility model.

In the figure, the respective symbols have the following meanings:

1. an upper cover; 11. a hole of abdication; 12. a first bent portion; 2. a lower cover; 21. a second bent portion; 3. a negative terminal; 31. a contact end; 32. a support end; 4. bonding the film; 5. a first dispensing area; 51. a first glue layer; 6. a second dispensing area; 61. a second adhesive layer; 7. a seal ring; 8. a third glue dispensing area; 81. and a third adhesive layer.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following examples are illustrated and described in detail as follows:

referring to fig. 1 to 2, the present embodiment provides a button cell with good sealing performance, which includes an upper cover 1, a lower cover 2, a negative terminal 3 and an adhesive sheet 4;

the upper end of the upper cover 1 is provided with a yielding hole 11;

the negative terminal 3 includes a contact end 31 and a support end 32;

the contact end 31 is arranged in the middle of the support end 32, and the contact end 31 is matched with the abdicating hole 11 and partially extends upwards from the abdicating hole 11;

the supporting end 32 is positioned right below the upper cover 1, and the upper end of the supporting end 31 is bonded with the lower end of the upper cover 1 through the adhesive sheet 4;

a first dispensing area 5 is formed in an area between the upper end face of the support end 32 close to the contact end 31 and the corresponding abdication hole 11 and the contact end 31;

a first glue layer 51 is arranged in the first glue dispensing area 5;

the first adhesive layer 51 is bonded to the contact ends 31, the support ends 32 and the adhesive sheet 4 around the first adhesive layer 51.

The present embodiment is formed by providing the upper cover 1, the lower cover 2, the negative terminal 3 and the adhesive sheet 4, by providing the first adhesive layer 51 in the first dispensing area 5, here, after the first adhesive layer 51 is filled into the first dispensing area 5, the first adhesive layer 51 is brought into sufficient contact with the contact terminals 31, the support terminals 32 and the adhesive sheet 4 around the first adhesive layer 51, after the first adhesive layer 51 is solidified, the contact ends 31, the support ends 32 and the adhesive sheet 4 around the first adhesive layer 51 are adhered together, since the upper cover 1 and the negative electrode terminal 3 have been bonded by the adhesive sheet 4 from the beginning, the provision of the first adhesive layer 51 further enhances the bonding effect, meanwhile, the first glue layer 51 thoroughly blocks gaps at the first gluing area 5, so that the packaging effect is further enhanced, the liquid leakage situation is avoided, the durability and reliability of the button cell are improved, and the service life of the button cell is prolonged.

Referring to fig. 1, a second dispensing area 6 is formed on a side end surface of the support end 32 away from the contact end 31 and a corresponding lower end of the upper cover 1, a second adhesive layer 61 is disposed in the second dispensing area 6, and the second adhesive layer 61 is bonded with the contact end 31, the support end 32 and the adhesive sheet 4 around the second adhesive layer 61.

Through setting up second glue film 61 in second dispensing area 6, here second glue film 61 fills in second dispensing area 6 back, contact end 31, support end 32 and the bonding film 4 around second glue film 61 are fully contacted with second glue film 61, after second glue film 61 solidifies, contact end 31 around second glue film 61, support end 32 and bonding film 4 bond together, because upper cover 1 and negative terminal 3 bond through bonding film 4 at first, the setting of second glue film 61 has further strengthened the bonding effect, the gap in second dispensing area 6 department has still thoroughly been stopped up to second glue film 61 simultaneously, further strengthened the encapsulation effect, the emergence of the weeping condition has been avoided.

Referring to fig. 1, the upper cover 1 is inserted into the lower cover 2, an annular first bent portion 12 is annularly disposed at an upper end of the upper cover 1, a second bent portion 21 is disposed at an upper end of the lower cover 2, a bending direction of the second bent portion 21 is the same as that of the first bent portion 12, a sealing ring 7 is disposed between an outer side wall of the upper cover 1 and an inner side wall of the lower cover 2, and an upper end of the sealing ring 7 extends out from between the first bent portion 12 and the second bent portion 21.

Through with upper cover 1 cartridge in lower cover 2, make first kink 12 and second kink 21 cooperate, the sealing washer has realized the leakproofness between upper cover 1 and the lower cover 2 owing to stretch out from the region between first kink 12 and the second kink 21, still makes even inseparabler of upper cover 1 and the pressfitting of lower cover 2 simultaneously, guarantees the encapsulation effect.

Referring to fig. 1, a third glue-dispensing area 8 is formed between the upper end of the first bending portion 12, the upper end of the second bending portion 21 and the sealing ring 7, and a third glue layer 81 is disposed in the third glue-dispensing area 8.

Through set up third glue film 81 in third glue zone 8, here third glue film 81 is filled to the back in third glue zone 8, third glue film 81 and the first kink 12 around the third glue film 81, second kink 21 and sealing washer 7 fully contact, after third glue film 81 solidifies, fully with upper cover 1 around the third glue film 81, lower cover 2 and sealing washer 7 bond together, because seal up between upper cover 1 and the lower cover 2 through sealing washer 7 at first, the setting of third glue film 81 has further strengthened sealed effect, the gap in third glue zone 8 department has still thoroughly been stopped up to third glue film 81 simultaneously, further strengthened the packaging effect, the emergence of the weeping condition has been avoided.

In the description of the present embodiments, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A button cell with good sealing performance comprises an upper cover, a lower cover and a negative terminal; the method is characterized in that: also comprises an adhesive film;

the upper end of the upper cover is provided with a yielding hole;

the negative terminal comprises a contact end and a support end;

a first glue layer is arranged in the first glue dispensing area;

2. The button cell with good sealing performance according to claim 1, wherein: and a second dispensing area is formed by the side end face of the support end far away from the contact end and the lower end of the corresponding upper cover, a second adhesive layer is arranged in the second dispensing area, and the second adhesive layer is bonded with the contact end, the support end and the adhesive film around the second adhesive layer.

3. A button cell with good sealing performance according to claim 2, wherein: the upper cover cartridge is in the lower cover, the upper end ring of upper cover is equipped with annular first kink, the upper end of lower cover is equipped with the second kink, the second kink with the direction of buckling of first kink is the same, the lateral wall of upper cover with be equipped with the sealing washer between the inside wall of lower cover, follow the upper end of sealing washer stretch out between first kink and the second kink.

4. A button cell with good sealing performance according to claim 3, wherein: the upper end of the first bending part, the upper end of the second bending part and the sealing ring form a third point glue area, and a third glue layer is arranged in the third point glue area.