CN108110201B - Pole piece fixing mechanism and button cell - Google Patents
Pole piece fixing mechanism and button cell Download PDFInfo
- Publication number
- CN108110201B CN108110201B CN201711448378.8A CN201711448378A CN108110201B CN 108110201 B CN108110201 B CN 108110201B CN 201711448378 A CN201711448378 A CN 201711448378A CN 108110201 B CN108110201 B CN 108110201B
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- China
- Prior art keywords
- pole piece
- shell
- cover shell
- current collecting
- collecting structure
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/153—Lids or covers characterised by their shape for button or coin cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/171—Lids or covers characterised by the methods of assembling casings with lids using adhesives or sealing agents
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a pole piece fixing mechanism and a button cell, and belongs to the technical field of cells. The pole piece fixing mechanism provided by the invention comprises a pole piece, a pole piece cover shell, a current collecting structure and a conductive elastic body, wherein the pole piece is arranged in a cavity on the pole piece cover shell, the current collecting structure is arranged between the pole piece and the pole piece cover shell, the conductive elastic body is positioned between the current collecting structure and the pole piece cover shell, one end of the conductive elastic body is abutted against the current collecting structure, and the other end of the conductive elastic body is abutted against the pole piece cover shell. Through set up electrically conductive elastomer between mass flow structure and pole piece lid shell, utilize electrically conductive elastomer's elasticity to make pole piece and pole piece lid shell keep good electricity all the time and connect, prevent to take place the phenomenon of contact failure between pole piece and the pole piece lid shell.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a pole piece fixing mechanism and a button battery using the same.
Background
Button cells, also called button cells, refer to cells with a small overall size like a small button, and are small in size and often used in electronic devices with low power consumption, such as small flashlights, electronic watches, and the like. The button cell can be classified into a cylindrical button cell, a square button cell and a special-shaped button cell according to the appearance of the button cell.
Button cells cover the mass flow body on positive plate and negative pole piece, and the positive pole mass flow body that commonly uses generally adopts stainless steel or stainless iron, and the negative pole mass flow body generally adopts the copper foil. In the existing button cell, a positive plate or a negative plate covered with a current collector is generally in direct contact with a pole piece cover shell, or a layer of conductive adhesive is coated on the pole piece and the pole piece cover shell, and the current collector and the conductive adhesive covered on the pole piece keep the contact between the pole piece and the pole piece cover shell, so that the good contact is kept inside the cell. However, since the pole piece is generally formed by stamping, stress release in the pole piece easily causes the pole piece to have a concave middle part and an upward warped outer edge, and after the stamped pole piece is mounted in the pole piece cover shell, the current collector cannot be contacted with the pole piece cover shell or the middle part of the conductive adhesive cannot be contacted with the pole piece due to the protruding outer edge. In addition, the surface that current button cell's pole piece lid shell and pole piece contacted is smooth surface, and when the battery used in complicated operating mode, the structure of battery inside changed very easily, and because the battery discharged the back, the inside positive plate and the negative pole piece consumption of battery, and the battery in the use inside temperature rose in high temperature environment in addition, the pole piece lid shell is the inflation very easily, and these circumstances all lead to battery internal contact bad easily, influence the normal use of battery.
Disclosure of Invention
The invention aims to provide a pole piece fixing mechanism which is compact in internal structure, can ensure that a pole piece is in close contact with a pole piece cover shell, is beneficial to improving the conductivity between the pole piece and the pole piece cover shell, and avoids the condition of poor contact.
The invention aims to provide a button cell which has a compact internal structure, can ensure good internal guidance of the cell, and is beneficial to improving the service range and the service life of the cell.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a pole piece fixed establishment, includes pole piece, pole piece lid shell and current-collecting structure, be provided with the cavity on the pole piece lid shell, the pole piece is arranged in the cavity, current-collecting structure sets up the pole piece with between the pole piece lid shell, still include conductive elastomer, conductive elastomer is located current-collecting structure with between the pole piece lid shell, just conductive elastomer one end with current-collecting structure butt, the other end with pole piece lid shell butt.
Preferably, the conductive elastic body is a cross-shaped elastic sheet.
Preferably, a recess is formed in the middle of the cross-shaped elastic sheet, the pole piece cover shell comprises a positive pole cover shell, the edge portion of the cross-shaped elastic sheet protrudes out of the middle of the cross-shaped elastic sheet, the middle of the cross-shaped elastic sheet abuts against the current collecting structure, the edge portion of the cross-shaped elastic sheet abuts against the positive pole cover shell, the current collecting structure is arranged between the recess and the positive pole cover shell, and the recess abuts against the current collecting structure between the recess and the positive pole cover shell.
Preferably, the middle part of the cross-shaped elastic sheet is welded on the pole piece cover shell.
Preferably, the current collecting structure is a current collector and/or a conductive coating.
Preferably, when the pole piece is a positive pole piece, the current collector is stainless steel or stainless iron;
and when the pole piece is a negative pole piece, the current collector is a copper foil.
Preferably, the conductive coating is conductive adhesive.
Preferably, the pole piece fixing mechanism further includes:
and the collector ring is sleeved at one end of the pole piece close to the conductive elastomer.
A button cell comprises the pole piece fixing mechanism.
Preferably, the pole piece is a positive pole piece, the pole piece cover shell is a positive pole cover shell, the cavity is a first cavity, the current collecting structure is arranged between the positive pole piece and the positive pole cover shell, and the conductive elastomer is positioned between the current collecting structure and the positive pole cover shell.
Preferably, the button cell further comprises:
negative pole lid shell, negative pole piece and isolation structure, be provided with on the negative pole lid shell and hold the second cavity of negative pole piece, negative pole lid shell spiral-lock is in on the positive pole lid shell, just first cavity with second cavity intercommunication, isolation structure sets up the positive pole piece with between the negative pole piece.
The invention has the beneficial effects that:
the pole piece fixing mechanism provided by the invention comprises a pole piece, a pole piece cover shell, a current collecting structure and a conductive elastic body, wherein the pole piece is arranged in a cavity on the pole piece cover shell, the current collecting structure is arranged between the pole piece and the pole piece cover shell, the conductive elastic body is positioned between the current collecting structure and the pole piece cover shell, one end of the conductive elastic body is abutted against the current collecting structure, and the other end of the conductive elastic body is abutted against the pole piece cover shell. Through set up electrically conductive elastomer between mass flow structure and pole piece lid shell, utilize electrically conductive elastomer's elasticity to make pole piece and pole piece lid shell keep good electricity all the time and connect, prevent that the battery from taking place the phenomenon of contact failure between pole piece and the pole piece lid shell in the use.
Drawings
FIG. 1 is an assembly view of a pole piece securing mechanism provided by the present invention;
fig. 2 is an exploded view of the pole piece securing mechanism provided by the present invention.
Fig. 3 is a cross-sectional view of a button cell provided by the present invention;
fig. 4 is a partially enlarged view of a portion a of fig. 3;
fig. 5 is a partially enlarged view of a portion B of fig. 3;
fig. 6 is an exploded view of a button cell provided by the present invention;
in the figure:
100. pole pieces; 101. a positive plate; 102. a negative plate; 200. a slip ring; 300. a current collecting structure; 400. a conductive elastomer; 500. a pole piece cover shell; 501. a positive electrode cap shell; 502. a negative cap shell; 600. and an isolation structure.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The invention provides a pole piece fixing mechanism, as shown in fig. 1 and fig. 2, the pole piece fixing mechanism includes a pole piece 100, a pole piece cover shell 500 (not shown in the figure), a current collecting structure 300 and a current collecting ring 200, the pole piece cover shell 500 is provided with a cavity for accommodating the pole piece 100, the current collecting structure 300 is arranged between the pole piece 100 and the pole piece cover shell 500, the current collecting structure 300 can be a current collector and/or a conductive coating, the current collector is a structure or a part for collecting current, and is mainly used for collecting current generated by active substances in a battery so as to form a larger current to be output to the outside, and the current collector in the prior art generally refers to metal foil, such as stainless steel or stainless iron and copper foil. The conductive coating can be conductive adhesive, the conductive adhesive is an adhesive with certain conductive performance after being cured or dried, matrix resin and conductive particles are generally used as main components, the conductive particles are combined to form a conductive path by utilizing the adhesive effect of the matrix resin, and the conductive coating has the advantages of simplicity in operation, high efficiency and the like. The current collector and the conductive coating may be used simultaneously or separately, and in this embodiment, the current collecting structure 300 is selected to use the conductive coating for the purpose of simplifying the structure and saving the cost. Conductive elastomer 400 is located between current collecting structure 300 and pole piece cover shell 500, and conductive elastomer 400's one end and current collecting structure 300 butt, the other end and pole piece cover shell 500 butt to will realize the electricity between current collecting structure 300 and the pole piece cover shell 500 and be connected, and then realize the electricity between pole piece 100 and the pole piece cover shell 500.
By arranging the conductive elastomer 400 between the current collecting structure 300 and the pole piece cover shell 500, the pole piece 100 and the pole piece cover shell 500 are always kept in good electrical connection by utilizing the elasticity of the conductive elastomer 400, when the pole piece 100 deforms due to stress or other external factors, or the pole piece cover shell 500 expands due to temperature rise, the conductive elastomer 400 can automatically adjust the shape and the elasticity of the conductive elastomer 400 according to the deformation of the pole piece 100 or the expansion degree of the pole piece cover shell 500, so that in the use process of the pole piece 100, one end of the conductive elastomer 400 is always abutted against the current collecting structure 300 and extrudes the current collecting structure 300 on the pole piece 100, the other end of the conductive elastomer 400 is always abutted against the pole piece cover shell 500, and further, the phenomenon of poor contact between the pole piece 100 and the pole piece cover shell 500 in the use process of the battery is prevented, and the battery cannot be normally used due to poor contact inside the battery is avoided, affecting the service life and the use effect of the battery.
Specifically, electrically conductive elastomer 400 can be cross shell fragment, and cross shell fragment includes two rectangle shell fragments of perpendicular connection, and two shell fragments can integrated into one piece, also can make respectively the back welding together, compare in the welding together, and integrated into one piece's cross shell fragment structure is more stable, and two shell fragments that certainly constitute cross shell fragment also can not connect perpendicularly, but compare in not connecting perpendicularly, and perpendicular connection is convenient for make, and stability is better. When the cross-shaped elastic sheet is installed, the lower end face of the cross-shaped elastic sheet is fixedly connected with the inner bottom face of the pole piece cover shell 500, the upper end face of the cross-shaped elastic sheet is abutted to the current collecting structure 300, the cross-shaped elastic sheet is generally connected with the pole piece cover shell 500 in a spot welding mode or a screw connection mode, the spot welding operation is simpler, the requirement on the installation space inside the pole piece cover shell 500 is smaller, and therefore spot welding is selected to be adopted in the embodiment.
Further, in order to improve the commonality of conductive elastomer 400, set up above-mentioned cross shell fragment into the middle part and be formed with sunkenly, the relative middle part of edge portion is protruding to be established or the arcuation structure of establishing of sunken, the arc structure has enlarged conductive elastomer 400's deformation range, be favorable to enlarging conductive elastomer 400's application range, be convenient for be used for conductive elastomer 400 in the battery of different specifications and size, in order to improve the stability of cross shell fragment, with the edge portion level setting of cross shell fragment or connect horizontal shell fragment at the edge portion of cross shell fragment. Of course, in other embodiments, the conductive elastic body 400 may also be selected to have other shapes, such as a bowl-shaped structure, a hemispherical structure, or other anisotropic structures, but compared to these structures, the cross-shaped elastic sheet has the advantages of less material consumption, easy stress release during compression, high changeability, and high stability, and therefore, in this embodiment, the conductive elastic body 400 is selected to be a cross-shaped elastic sheet.
In order to limit the position of the pole piece 100 in the pole piece cover shell 500 and prevent the pole piece 100 from shaking in the pole piece cover shell 500 during the use of the battery, which affects the performance stability of the battery, a collector ring 200 is further arranged in the cavity of the pole piece cover shell 500, the collector ring 200 comprises a bottom plate and a side wall protruding upwards along the side line of the bottom plate, a through hole is arranged on the bottom plate, an annular clamping groove is arranged at one end of the pole piece 100 along the circumferential direction of the end plate, and the collector ring 200 is sleeved in the annular clamping groove.
The present embodiment further provides a button cell using the above-mentioned pole piece fixing mechanism, as shown in fig. 3 to fig. 6, the pole piece 100 of the button cell includes a positive pole piece 101 and a negative pole piece 102, the pole piece cover case 500 includes a positive pole cover case 501 and a negative pole cover case 502, the positive pole cover case 501 is provided with a first cavity, the negative pole cover case 502 is provided with a second cavity, the negative pole cover case 502 is fastened on the positive pole cover case 501, and the negative pole cover case 502 is hermetically connected with the positive pole cover case 501, the specific sealing form is not limited herein, when the negative pole cover case 502 is fastened on the positive pole cover case 501, the first cavity is communicated with the second cavity, in order to avoid the mutual influence between the positive pole piece 101 and the negative pole piece 102, the isolating structure 600 is provided between the positive pole piece 101 and the negative pole piece 102, the isolating structure 600 is a case-like structure and includes a negative pole piece and a turned-over edge bent downward along a negative pole edge line, the isolating structure 600 is fastened on the positive pole, the negative electrode tab 102 is disposed over the separator structure 600. In this embodiment, the conductive elastic body 400 is located between the positive electrode tab 101 and the positive electrode cover case 501, and the current collecting ring 200 is a positive current collecting ring sleeved on one end of the positive electrode tab 101 close to the positive electrode cover case 501. Of course, in other embodiments, the conductive elastomer 400 may also be used between the negative electrode tab 102 and the negative electrode cap casing 502.
The assembly process of the button cell is as follows: the bottom of the conductive elastic body 400 is spot-welded on the inner bottom surface of the positive cover shell 501, the positive current collecting ring is welded on the edge portion of the upper end surface of the conductive elastic body 400, due to the fact that the through hole is formed in the bottom plate of the positive current collecting ring, the middle portion of the conductive elastic body 400 protrudes out of the through hole in the positive current collecting ring, conductive glue is coated on the conductive elastic body 400, the positive plate 101 is quickly sleeved inside the positive current collecting ring, the positive plate 101 is in contact with the conductive glue on the conductive elastic body 400, finally the isolation structure 600 is sequentially covered on the positive plate 101, the negative plate 102 is arranged above the isolation structure 600, the negative cover shell 502 is buckled on the positive cover shell 501, and then a gap between the negative cover shell 502 and the positive cover shell 501 is sealed.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (7)
1. A pole piece fixing mechanism comprises a pole piece (100), a pole piece cover shell (500) and a current collecting structure (300), wherein a cavity is arranged on the pole piece cover shell (500), the pole piece (100) is arranged in the cavity, the current collecting structure (300) is arranged between the pole piece (100) and the pole piece cover shell (500), the pole piece fixing mechanism is characterized by further comprising a conductive elastic body (400), the conductive elastic body (400) is arranged between the current collecting structure (300) and the pole piece cover shell (500), one end of the conductive elastic body (400) is abutted against the current collecting structure (300), and the other end of the conductive elastic body is abutted against the pole piece cover shell (500);
the current collecting structure (300) is a current collector and a conductive coating;
the conductive elastic body (400) is a cross-shaped elastic sheet, the pole piece cover shell (500) comprises an anode cover shell (501), a recess is formed in the middle of the cross-shaped elastic sheet, the edge portion of the cross-shaped elastic sheet is arranged in a protruding mode relative to the middle of the cross-shaped elastic sheet, the middle of the cross-shaped elastic sheet is abutted to the current collecting structure (300), the edge portion of the cross-shaped elastic sheet is abutted to the anode cover shell (501), the current collecting structure (300) is arranged between the recess and the anode cover shell (501), and the recess is abutted to the current collecting structure (300) between the recess and the anode cover shell (501).
2. The pole piece securing mechanism of claim 1,
when the pole piece (100) is a positive pole piece (101), the current collector is stainless steel or stainless iron;
when the pole piece (100) is a negative pole piece (102), the current collector is a copper foil.
3. The pole piece securing mechanism of claim 1,
the conductive coating is conductive adhesive.
4. The pole piece securing mechanism of claim 1, further comprising:
the collector ring (200) is sleeved at one end, close to the conductive elastic body (400), of the pole piece (100).
5. A button cell battery comprising the pole piece securing mechanism of any one of claims 1-4.
6. The button cell battery according to claim 5,
the pole piece (100) is positive plate (101), pole piece lid shell (500) is positive pole lid shell (501), the cavity is first cavity, mass flow structure (300) set up positive plate (101) with between positive pole lid shell (501), electrically conductive elastomer (400) are located mass flow structure (300) with between positive pole lid shell (501).
7. The button cell according to claim 6, further comprising:
negative pole lid shell (502), negative pole piece (102) and isolation structure (600), be provided with on negative pole lid shell (502) and hold the second cavity of negative pole piece (102), negative pole lid shell (502) spiral-lock is in on positive pole lid shell (501), just first cavity with the second cavity intercommunication, isolation structure (600) set up positive plate (101) with between negative pole piece (102).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711448378.8A CN108110201B (en) | 2017-12-27 | 2017-12-27 | Pole piece fixing mechanism and button cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711448378.8A CN108110201B (en) | 2017-12-27 | 2017-12-27 | Pole piece fixing mechanism and button cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108110201A CN108110201A (en) | 2018-06-01 |
| CN108110201B true CN108110201B (en) | 2021-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711448378.8A Active CN108110201B (en) | 2017-12-27 | 2017-12-27 | Pole piece fixing mechanism and button cell |
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| CN (1) | CN108110201B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111564651B (en) * | 2020-05-12 | 2024-01-19 | 路华置富电子(深圳)有限公司 | Lap wound cell |
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| CN108110201A (en) | 2018-06-01 |
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