CN211578821U

CN211578821U - Explosion-proof structure of button cell

Info

Publication number: CN211578821U
Application number: CN201922446659.0U
Authority: CN
Inventors: 吴建平; 黄子欣; 周开礼; 吴永文; 王雁斌; 吴劲贤; 刘双飞; 吴荣鑫
Original assignee: Zhangzhou Wanbao Energy Technology Co ltd
Current assignee: Zhangzhou Wanbao Energy Technology Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-09-25
Anticipated expiration: 2029-12-30

Abstract

The utility model relates to an explosion-proof structure of button cell, including covering the upper shell cover and the lower shell body that form, the lower shell body is equipped with the electrode isolation subassembly with the upper shell cover inside, the electrode isolation subassembly includes positive electrode piece, negative electrode piece and is located between positive electrode piece, the negative electrode piece and is used for keeping apart the isolator of positive, negative electrode piece, be equipped with respectively to the positive pole utmost point ear, the negative pole utmost point ear that extend respectively of electrode isolation subassembly upper portion and lower part on the electrode isolation subassembly; the button cell is characterized in that the positive electrode tab is connected with the positive electrode plate, the negative electrode tab is connected with the negative electrode plate, at least one of the inner surfaces of the upper shell or the lower shell, which are opposite to the upper surface and the lower surface of the winding body, is provided with a concave notch which is not annular, the explosion-proof structure of the button cell is simple in structure, and pressure relief can be effectively carried out when the pressure in the button cell is too large.

Description

Explosion-proof structure of button cell

Technical Field

The utility model relates to a button cell's explosion-proof construction.

Background

Button cells are batteries with the overall dimensions like a small button, generally speaking, the button cells have a large diameter and a small thickness (compared with cylindrical batteries such as batteries of AA 5 on the market), the button cells are classified from the aspect of the appearance, and the equivalent corresponding batteries are classified into cylindrical batteries, square batteries, special-shaped batteries and the like.

The electrode isolation component in the button cell comprises a laminated type button cell and a wound type button cell, and explosion accidents can occur in the using process of the laminated type button cell and the wound type button cell, so that great loss is caused to human bodies and property, and no method or structure for effectively preventing the accidents is available at present.

SUMMERY OF THE UTILITY MODEL

In view of the not enough of prior art, the utility model aims to solve the technical problem that an explosion-proof structure for button cell is provided, simple structure not only can effectively carry out the pressure release when too big because of the button cell interior pressure moreover, avoids the emergence of explosion accident.

In order to solve the technical problem, the technical scheme of the utility model is that: an explosion-proof structure of a button battery comprises an upper shell cover and a lower shell cover which are covered, wherein an electrode isolation assembly is arranged inside the lower shell and the upper shell cover, the electrode isolation assembly comprises a positive electrode plate, a negative electrode plate and an isolation body which is positioned between the positive electrode plate and the negative electrode plate and used for isolating the positive electrode plate and the negative electrode plate, and the electrode isolation assembly is provided with a positive electrode lug and a negative electrode lug which respectively extend towards the upper part and the lower part of the electrode isolation assembly; the positive electrode tab is connected with the positive electrode plate, the negative electrode tab is connected with the negative electrode plate, and at least one of the inner surfaces of the upper shell cover or the lower shell body, which are opposite to the upper surface and the lower surface of the winding body, is provided with a concave notch groove which is not formed into a ring shape.

Further, the upper shell cover and the lower shell are both cylindrical, the electrode isolation assembly is coaxially mounted between the upper shell cover and the lower shell, and the concave notch groove is in an unclosed curve shape on the upper shell cover or the lower shell.

Furthermore, the positive pole lug and the negative pole lug are electrically connected with the inner surface of the upper shell cover or the lower shell body through bonding conductive layers.

Furthermore, the area of the circle where the concave groove is located accounts for 50% -99% of the inner surface area of the upper shell cover or the lower shell body.

Furthermore, the concave notch groove is concavely arranged in the upper shell cover or the lower shell, and the depth of the concave notch groove accounts for 80% -95% of the thickness of the upper shell cover or the lower shell.

Compared with the prior art, the utility model discloses following beneficial effect has: concave notch grooves are concavely arranged on the upper surface inside the upper shell cover or the lower surface inside the lower shell cover, the concave notch grooves are in a major arc shape, when the internal pressure in the button battery rises to a certain extent, the part in the concave notch grooves can be flicked under pressure towards the outside of the button battery to release the pressure, and therefore the explosion accident is avoided.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged view of A in FIG. 1;

fig. 3 is a bottom view of the upper housing cover according to the embodiment of the present invention;

fig. 4 is a schematic view of the connection between the negative electrode plate and the electrode isolation assembly in the embodiment of the present invention.

In the figure: 1-an upper shell cover, 2-a lower shell body, 3-an electrode isolation assembly, 4-a positive electrode plate, 5-a negative electrode plate, 6-an isolation body, 7-a positive electrode lug, 8-a negative electrode lug, 9-a concave notch groove and 9-a conducting layer.

Detailed Description

In order to make the aforementioned and other features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

As shown in fig. 1 to 4, an explosion-proof structure of a button cell includes an upper case cover 1 and a lower case 2, which are covered, wherein an electrode isolation assembly 3 is disposed inside the upper case cover and the lower case cover, the electrode isolation assembly includes a positive electrode plate 4, a negative electrode plate 5, and a positive electrode tab 7 and a negative electrode tab 8, which are disposed between the positive electrode plate and the negative electrode plate and used for isolating the positive electrode plate from the negative electrode plate 6 (the electrode isolation assembly may be a laminated type or a wound type, and a wound type is mainly used as an example), and the electrode isolation assembly is provided with the positive electrode tab 7 and the negative electrode tab 8, which respectively extend to the upper portion and the lower; the positive pole lug is connected with the positive pole piece, the negative pole lug is connected with the negative pole piece, at least one of the inner surfaces of the upper shell cover or the lower shell body, which are opposite to the upper surface and the lower surface of the winding body, is provided with a concave notch 9 which is not formed into a ring shape, the upper end of the positive pole lug is connected with the upper wall of the inner end of the upper shell cover above, and the lower end of the negative pole lug is connected with the lower wall of the inner end of the lower shell body below.

The embodiment of the utility model provides an in, go up the cap and be the tube-shape with lower casing, electrode isolation component coaxial arrangement is between cap and lower casing, concave notch cut is not closed curve form on cap or lower casing, and the shape that this curve formed can be circular, rectangle etc. (in the embodiment of the utility model discloses an use circularly as the example), totally closed promptly can not appear the risk that whole popped out under the prerequisite of guaranteeing to receive interior pressure to pop out.

In the embodiment of the present invention, the positive electrode tab and the negative electrode tab are electrically connected to the inner surface of the upper shell cover or the lower shell cover by bonding the conductive layer 10.

In the embodiment of the present invention, the area of the circle where the concave notch groove is located accounts for 50% -99% of the inner surface area of the upper shell cover or the lower shell cover, and the larger the area is, the higher the speed of releasing the internal pressure is.

In the embodiment of the present invention, the depth of the concave groove is set between 80% and 95% of the thickness of the upper case cover or the lower case body, and the internal pressure inside the battery is usually set to be 1.0-1.5Mpa, which is set to be 1.0-1.5Mpa, so as to ensure the internal pressure to be released when the internal pressure reaches 1.0-1.5Mpa, thereby avoiding the explosion accident.

The embodiment of the utility model provides a theory of operation: when the button cell normally works, the positive electrode plate and the negative electrode plate are electrically connected with the upper shell cover and/or the lower shell through the positive electrode lug, the negative electrode lug and the metal sheet, and voltage is output on the upper shell cover and the lower shell; when button cell produced inflation gas and interior pressure when continuously rising, go up cap and lower casing and produce swell or relative displacement, the last cap that is located concave notch groove this moment or lower casing part will be outwards flicked under the effect of interior pressure, appear opening circuit in the messenger button cell, avoid inflation gas to continue to produce, and release internal pressure, avoid the production of explosion accident.

Any technical solution disclosed in the present invention is, unless otherwise stated, disclosed a numerical range if it is disclosed, and the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Because numerical value is more, can't be exhaustive, so the utility model discloses just disclose some numerical values with the illustration the technical scheme of the utility model to, the numerical value that the aforesaid was enumerated should not constitute right the utility model discloses create the restriction of protection scope.

If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.

Also, above-mentioned the utility model discloses if disclose or related to mutually fixed connection's spare part or structure, then, except that other the note, fixed connection can understand: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In addition, the terms used in any aspect of the present disclosure as described above to indicate positional relationships or shapes include similar, analogous, or approximate states or shapes unless otherwise stated.

The utility model provides an arbitrary part both can be assembled by a plurality of solitary component parts and form, also can be the solitary part that the integrated into one piece technology was made.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims

1. The utility model provides an explosion-proof structure of button cell which characterized in that: the electrode isolation assembly comprises a positive electrode plate, a negative electrode plate and an isolation body positioned between the positive electrode plate and the negative electrode plate and used for isolating the positive electrode plate and the negative electrode plate, and is provided with a positive electrode lug and a negative electrode lug which respectively extend towards the upper part and the lower part of the electrode isolation assembly; the positive electrode tab is connected with the positive electrode plate, the negative electrode tab is connected with the negative electrode plate, and at least one of the inner surfaces of the upper shell cover or the lower shell body, which are opposite to the upper surface and the lower surface of the winding body, is provided with a concave notch groove which is not formed into a ring shape.

2. The explosion-proof structure of the button cell as set forth in claim 1, wherein: the upper shell cover and the lower shell are both cylindrical, the electrode isolation assembly is coaxially mounted between the upper shell cover and the lower shell, and the concave notch groove is in an unclosed curve shape on the upper shell cover or the lower shell.

3. The explosion-proof structure of the button cell as set forth in claim 2, wherein: and the positive pole lug and the negative pole lug are electrically connected with the inner surface of the upper shell cover or the lower shell body through bonding conductive layers.

4. The explosion-proof structure of the button cell as set forth in claim 2, wherein: the area of the circle where the concave notch groove is located accounts for 50% -99% of the inner surface area of the upper shell cover or the lower shell body.

5. The explosion-proof structure of the button cell as set forth in claim 2, wherein: the concave groove is concavely arranged in the upper shell cover or the lower shell, and the depth of the concave groove accounts for 80% -95% of the thickness of the upper shell cover or the lower shell.