CN210379129U - Button cell - Google Patents

Button cell Download PDF

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Publication number
CN210379129U
CN210379129U CN202020220196.6U CN202020220196U CN210379129U CN 210379129 U CN210379129 U CN 210379129U CN 202020220196 U CN202020220196 U CN 202020220196U CN 210379129 U CN210379129 U CN 210379129U
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CN
China
Prior art keywords
explosion
pole
shell
proof
button cell
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Active
Application number
CN202020220196.6U
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Chinese (zh)
Inventor
梁立维
汤国胜
文小平
张剑
雷磊
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BYD Co Ltd
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BYD Co Ltd
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Priority to CN202020220196.6U priority Critical patent/CN210379129U/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The utility model discloses a button cell, button cell includes: the explosion-proof device comprises a shell, a shell body and a cover, wherein an accommodating cavity is formed in the shell body, and the shell body is provided with an explosion-proof port communicated with the accommodating cavity; a pole mounted to the housing; the insulating sealing element is arranged between the pole and the shell and seals a gap between the pole and the shell, and the insulating sealing element seals the explosion-proof opening on the outer side of the shell and avoids the explosion-proof opening on the inner side of the shell; the pole core is arranged in the accommodating cavity and is respectively electrically connected with the shell and the pole. According to the utility model discloses button cell has explosion-proof function, and simple structure, with low costs.

Description

Button cell
Technical Field
The utility model belongs to the technical field of the battery technique and specifically relates to a button cell is related to.
Background
Button cell among the correlation technique, when internal pressure was too big, for the pressure release, set up explosion-proof valve on the casing usually to reach explosion-proof purpose, promote the security, nevertheless adopt explosion-proof valve's mode, the structure is complicated relatively, and the cost is higher.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the present invention is to provide a button cell, which has an explosion-proof function, and has a simple structure and a low cost.
In order to achieve the above object, according to the utility model discloses an embodiment provides a button cell, button cell includes: the explosion-proof device comprises a shell, a shell body and a cover, wherein an accommodating cavity is formed in the shell body, and the shell body is provided with an explosion-proof port communicated with the accommodating cavity; a pole mounted to the housing; the insulating sealing element is arranged between the pole and the shell and seals a gap between the pole and the shell, and the insulating sealing element seals the explosion-proof opening on the outer side of the shell and avoids the explosion-proof opening on the inner side of the shell; the pole core is arranged in the accommodating cavity and is respectively electrically connected with the shell and the pole.
According to the utility model discloses button cell has explosion-proof function, and simple structure, with low costs.
According to some embodiments of the invention, the pole covers a portion of a side of the insulating seal facing away from the housing, the pole pressing the insulating seal against an outer side of the housing; in a plane perpendicular to the axial direction of the explosion-proof opening, the orthographic projection of the pole is partially overlapped with the orthographic projection of the explosion-proof opening.
Further, in a plane perpendicular to the axial direction of the explosion-proof opening, the overlapped part of the orthographic projection of the pole and the orthographic projection of the explosion-proof opening occupies 40% -60% of the area of the explosion-proof opening.
According to some embodiments of the invention, the insulating seal comprises: the connecting cylinder penetrates through the shell; the outer ring part is connected to one end of the connecting cylinder and is positioned outside the shell, and the outer ring part blocks the explosion-proof port; the inner ring portion is connected to the other end of the connecting cylinder and located in the shell, and the inner ring portion avoids the explosion-proof opening.
Further, the outer diameter of the outer ring portion is larger than the outer diameter of the inner ring portion.
Further, the surface of the outer ring part facing the shell is provided with a protrusion, and the protrusion blocks the explosion-proof opening.
Further, the casing is equipped with utmost point post mounting hole, the connecting cylinder wears to locate utmost point post mounting hole, utmost point post wears to locate the connecting cylinder.
According to some specific examples of the utility model, utmost point post includes: the cylinder penetrates through the connecting cylinder; the outer pole cap is connected to one end of the column body and located outside the shell, and the outer ring part is arranged between the outer pole cap and the outer side face of the shell; the inner pole cap is connected to the other end of the column body and located in the shell, and the inner ring portion is arranged between the inner pole cap and the inner side face of the shell.
Further, the button cell still includes: the connecting piece is penetrated by the cylinder and is positioned between the inner pole cap and the inner ring part, and the pole core is electrically connected with the pole through the connecting piece.
According to some embodiments of the invention, the housing comprises: the containing cavity is formed in the shell seat, and the pole core is electrically connected with the shell seat and the pole respectively; the apron, the apron install in shell seat and closing cap hold the chamber, explosion-proof mouthful form in the apron, utmost point post install in the apron, insulating seal locates utmost point post with between the apron, insulating seal is in the outside shutoff of apron explosion-proof mouthful just is in the inboard of apron is avoided explosion-proof mouthful.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a button cell according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a cover plate, an insulating sealing member and a pole of a button cell according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an insulating sealing member of a button cell according to an embodiment of the present invention.
Reference numerals:
a button cell 1,
A shell 100, an accommodating cavity 101, an explosion-proof port 102, a pole mounting hole 103, a shell base 110, a cover plate 120,
A pole 200, a column 210, an outer pole cap 220, an inner pole cap 230,
An insulating seal 300, a connecting cylinder 310, an outer ring portion 320, a protrusion 321, an inner ring portion 330, a,
A pole core 400,
And connecting the sheet 500.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
In the description of the present invention, "a plurality" means two or more, and "a plurality" means one or more.
The button battery 1 according to an embodiment of the present invention will be described below with reference to the accompanying drawings, and the button battery 1 may be a button type lithium ion secondary battery.
As shown in fig. 1 to 3, a button battery 1 according to an embodiment of the present invention includes a case 100, a terminal 200, an insulating seal 300, and a terminal core 400.
A housing chamber 101 is configured in the housing 100, and the housing 100 is provided with an explosion-proof port 102 communicating with the housing chamber 101. The pole 200 is mounted to the housing 100. The insulating seal 300 is provided between the pole 200 and the housing 100, the insulating seal 300 insulates and seals the pole 200 and the housing 100, the insulating seal 300 seals the explosion-proof opening 102 on the outer side of the housing 100 and avoids the explosion-proof opening 102 on the inner side of the housing 100, in other words, the outer side of the explosion-proof opening 102 is sealed by the insulating seal 300, and the inner side of the explosion-proof opening 102 is not shielded by the insulating seal 300. The pole core 400 is arranged in the accommodating cavity 101 and is electrically connected with the shell 100 and the pole 200 respectively, and the pole core 400 can be a cylindrical winding body and simultaneously accommodates electrolyte in the accommodating cavity 101.
According to the utility model discloses button cell 1, through set up explosion-proof mouth 102 on casing 100, and utilize insulating sealing member 300 between utmost point post 200 and casing 100 to block up the outside of explosion-proof mouth 102, like this, when battery internal pressure was too big, insulating sealing member 300 was by jack-up, and the inside pressure of battery passes through explosion-proof mouth 102 and arranges to the external world, reaches explosion-proof purpose, can effectively promote the security performance of battery. In addition, the original installation structure of the pole 200, namely the insulating sealing element 300 is used for sealing the outer side of the explosion-proof opening 102, so that the explosion-proof function is realized, and components such as an explosion-proof valve and the like are not required to be additionally arranged, so that the structure is simplified, and the cost is reduced.
Therefore, according to the utility model discloses button cell 1 has explosion-proof function, and simple structure, with low costs.
In some embodiments of the present invention, as shown in fig. 1, the housing 100 includes a housing seat 110 and a cover plate 120. The receiving cavity 101 is formed in the housing base 110, and the pole piece 400 is electrically connected to the housing base 110 and the pole piece 200, respectively. The cover plate 120 is mounted on the housing base 110 and covers the accommodating cavity 101, the explosion-proof opening 102 is formed in the cover plate 120, the pole 200 is mounted on the cover plate 120, the insulating sealing element 300 is arranged between the pole 200 and the cover plate 120 to insulate and seal the pole 200 and the cover plate 120, the insulating sealing element 300 seals the explosion-proof opening 102 on the outer side of the cover plate 120, and the insulating sealing element 300 avoids the explosion-proof opening 102 on the inner side of the cover plate 120.
Wherein, insulating seal 300 can be formed through injection moulding on apron 120, and explosion-proof mouth 102 can set up to a plurality ofly and set up along the circumference interval of apron 120, and the outside of a plurality of explosion-proof mouths 102 all is blocked by insulating seal 300, and the inboard of a plurality of explosion-proof mouths 102 all opens and hold chamber 101 intercommunication.
In some embodiments of the present invention, the pole 200 covers a portion of one side of the insulating sealing member 300 facing away from the cover plate 120, and the pole 200 compresses the insulating sealing member 300 to the outside of the cover plate 120.
In a plane perpendicular to the axial direction of the explosion-proof opening 102, the orthographic projection of the pole 200 is overlapped with the orthographic projection of the explosion-proof opening 102, that is, the pole 200 covers a part of the explosion-proof opening 102. Therefore, the pole 200 can be used for compressing the insulating sealing element 300, and the pressure of the insulating sealing element 300 for blocking the explosion-proof port 102 is ensured, so that the pressure relief pressure is favorably controlled, and the reliability of the explosion-proof performance is ensured.
For example, in a plane perpendicular to the axial direction of the explosion-proof opening 102, the overlapping portion of the orthographic projection of the pole 200 and the orthographic projection of the explosion-proof opening 102 occupies 40% -60% of the area of the explosion-proof opening 102.
In some specific examples of the present invention, as shown in fig. 3, the insulating seal 300 includes a connecting cylinder 310, an outer ring portion 320, and an inner ring portion 330.
The connecting cylinder 310 has a hollow structure, and the connecting cylinder 310 is inserted into the cover plate 120. The outer ring portion 320 is connected to one end of the connector cylinder 310 and is located outside the housing 100. The inner ring portion 330 is connected to the other end of the connecting cylinder 310 and located in the housing 100, the outer diameter of the outer ring portion 320 is larger than that of the inner ring portion 330, the outer ring portion 320 seals the explosion-proof opening 102, and the inner ring portion 330 avoids the explosion-proof opening 102. Therefore, the insulating sealing member 300 not only can insulate and seal the pole 200 and the cover plate 120, but also can form an explosion-proof structure by being matched with the explosion-proof opening 102, so that the safety of the battery is improved.
Further, the surface of the outer ring part 320 facing the cover plate 120 is provided with a protrusion 321, and the protrusion 321 is fitted in the explosion-proof port 102 to seal the explosion-proof port 102, so that the sealing effect on the explosion-proof port 102 can be improved, and the pressure relief pressure can be set by adjusting the interference degree between the protrusion 321 and the explosion-proof port 102, thereby facilitating the pressure control inside the battery.
In some specific examples of the present invention, as shown in fig. 1, the center of the cover plate 120 is provided with the pole mounting hole 103, the connecting cylinder 310 is disposed through the pole mounting hole 103, and the pole 200 is disposed through the connecting cylinder 310.
Specifically, as shown in fig. 1, the pole 200 includes a post 210, an outer pole cap 220, and an inner pole cap 230.
The cylinder 210 is inserted into the connecting cylinder 310. The outer pole cap 220 is connected to one end of the cylinder 210 and located outside the casing 100, and the outer ring portion 320 is located between the outer pole cap 220 and the outer side surface of the cover plate 120. The inner pole cap 230 is connected to the other end of the column 210 and located in the casing 100, and the inner ring 330 is disposed between the inner pole cap 230 and the inner side surface of the cover plate 120.
Thereby, the reliability of the terminal post 200 on the cover plate 120 can be improved while ensuring stable electrical connection of the terminal post 200, and in some optional examples, the terminal post 200 may be a rivet. In addition, the outer ring part 320 outside the explosion-proof opening 102 is pressed by the outer pole cap 220 to form a seal, when the internal pressure of the battery is higher than the pressure, the outer ring part 320 is jacked up, and the internal pressure of the battery is exhausted to the outside through the explosion-proof opening 102, so that the explosion-proof purpose is achieved.
Further, the button cell 1 further includes a connecting piece 500, the connecting piece 500 is penetrated by the column 210 and located between the inner pole cap 230 and the inner ring portion 330, and the pole core 400 is electrically connected with the pole 200 through the connecting piece 500, so as to improve convenience and reliability of electrical connection.
In some specific examples of the present invention, as shown in fig. 1 and 2, the outer diameter of the outer pole cap 220 is smaller than the outer diameter of the outer ring portion 320.
Specifically, the outer pole cap 220 presses a part of the outer ring 320 against the cover plate 120, and an orthographic projection of the outer pole cap 220 coincides with an orthographic projection of the explosion vent 102 in a plane perpendicular to an axial direction of the explosion vent 102, for example, an overlapping portion of the orthographic projection of the outer pole cap 220 and the orthographic projection of the explosion vent 102 occupies 40% -60% of an area of the explosion vent 102.
Further, the outer diameter of the connecting piece 500 is smaller than that of the inner ring portion 330, and the outer diameter of the inner pole cap 230 is smaller than that of the connecting piece 500, so that the size of the connecting piece 500 can be set reasonably, and the connecting piece 500 is exposed sufficiently to facilitate electrical connection with the pole core 400.
Other constructions and operations of the button cell 1 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.
In the description herein, references to the description of the terms "particular embodiment," "particular example," 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A button cell, comprising:
the explosion-proof device comprises a shell, a shell body and a cover, wherein an accommodating cavity is formed in the shell body, and the shell body is provided with an explosion-proof port communicated with the accommodating cavity;
a pole mounted to the housing;
the insulating sealing element is arranged between the pole and the shell and seals a gap between the pole and the shell, and the insulating sealing element seals the explosion-proof opening on the outer side of the shell and avoids the explosion-proof opening on the inner side of the shell;
the pole core is arranged in the accommodating cavity and is respectively electrically connected with the shell and the pole.
2. The button cell according to claim 1, wherein the pole covers a portion of a side of the insulating seal facing away from the housing, the pole pressing the insulating seal against an outer side of the housing;
in a plane perpendicular to the axial direction of the explosion-proof opening, the orthographic projection of the pole is partially overlapped with the orthographic projection of the explosion-proof opening.
3. The button cell according to claim 2, wherein in a plane perpendicular to the axial direction of the explosion-proof opening, the overlapping portion of the orthographic projection of the pole and the orthographic projection of the explosion-proof opening occupies 40-60% of the area of the explosion-proof opening.
4. The button cell of claim 1, wherein the insulating seal comprises:
the connecting cylinder penetrates through the shell;
the outer ring part is connected to one end of the connecting cylinder and is positioned outside the shell, and the outer ring part blocks the explosion-proof port;
the inner ring portion is connected to the other end of the connecting cylinder and located in the shell, and the inner ring portion avoids the explosion-proof opening.
5. The button cell of claim 4, wherein an outer diameter of the outer ring portion is greater than an outer diameter of the inner ring portion.
6. The button cell according to claim 4, wherein a surface of the outer ring portion facing the housing is provided with a protrusion, and the protrusion blocks the explosion-proof opening.
7. The button battery according to claim 4, wherein the housing is provided with a post mounting hole, the connecting cylinder is arranged in the post mounting hole in a penetrating manner, and the post is arranged in the connecting cylinder in a penetrating manner.
8. The button cell according to claim 7, wherein the post comprises:
the cylinder penetrates through the connecting cylinder;
the outer pole cap is connected to one end of the column body and located outside the shell, and the outer ring part is arranged between the outer pole cap and the outer side face of the shell;
the inner pole cap is connected to the other end of the column body and located in the shell, and the inner ring portion is arranged between the inner pole cap and the inner side face of the shell.
9. The button cell as defined in claim 8, further comprising:
the connecting piece is penetrated by the cylinder and is positioned between the inner pole cap and the inner ring part, and the pole core is electrically connected with the pole through the connecting piece.
10. Button cell according to any of claims 1 to 9, wherein the housing comprises:
the containing cavity is formed in the shell seat, and the pole core is electrically connected with the shell seat and the pole respectively;
the apron, the apron install in shell seat and closing cap hold the chamber, explosion-proof mouthful form in the apron, utmost point post install in the apron, insulating seal locates utmost point post with between the apron, insulating seal is in the outside shutoff of apron explosion-proof mouthful just is in the inboard of apron is avoided explosion-proof mouthful.
CN202020220196.6U 2020-02-27 2020-02-27 Button cell Active CN210379129U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020220196.6U CN210379129U (en) 2020-02-27 2020-02-27 Button cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020220196.6U CN210379129U (en) 2020-02-27 2020-02-27 Button cell

Publications (1)

Publication Number Publication Date
CN210379129U true CN210379129U (en) 2020-04-21

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Country Status (1)

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CN (1) CN210379129U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022033564A1 (en) * 2020-08-13 2022-02-17 珠海冠宇电池股份有限公司 Battery case and battery

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022033564A1 (en) * 2020-08-13 2022-02-17 珠海冠宇电池股份有限公司 Battery case and battery

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