CN212461836U

CN212461836U - Button cell

Info

Publication number: CN212461836U
Application number: CN202021541737.1U
Authority: CN
Inventors: 黄理博
Original assignee: Dongguan Tianqiu Enterprise Co ltd
Current assignee: Dongguan Tianqiu Enterprise Co ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2021-02-02
Anticipated expiration: 2030-07-29

Abstract

The utility model relates to the technical field of batteries, concretely relates to button cell, including negative pole shell, positive polar cap, negative pole lithium piece, diaphragm, positive polar plate and conductive adhesive layer, the lower terminal surface of negative pole lithium piece laminate in the up end of negative pole shell inner chamber, the lower terminal surface of diaphragm laminate in the upper end of negative pole lithium piece, the lower terminal surface of positive polar plate laminate in the up end of diaphragm, the up end of positive polar plate has coated conductive adhesive layer, conductive adhesive layer's up end with the lower terminal surface laminating of positive polar cap inner chamber, the negative pole shell block in the positive polar cap, just negative pole shell and positive polar cap edge joint position are through injection molding glue piece sealing connection. The utility model discloses a button cell has overcome and has set up anodal net in button cell in the past and influence the problem of the discharge electric current size at the easy consume resistance of use, has prolonged life, still has the characteristics that electric conductive property is good and low in production cost.

Description

Button cell

Technical Field

The utility model relates to a battery technology field, concretely relates to button cell.

Background

The button cell is also called as button cell, which refers to a cell with the overall dimension like a small button, generally speaking, the diameter is larger, the thickness is thinner, the cell is of a flat structure, the button cell has smaller volume, and can be widely applied to various miniature electronic products, the practicability is high, and the button cell has the advantages of stable discharge voltage, wide working temperature range, long storage life and the like, and can be widely applied to various products such as computer mainboards, calculators, electronic watches, remote controllers, electronic toys and the like. The button cell is classified from the appearance, and the equivalent corresponding cells are classified into a cylindrical cell, a square cell and a special-shaped cell; the existing button cell is easy to scratch on the surface and not high enough in hardness, and the positive metal net inside the button cell is easy to wear resistance to influence the magnitude of discharged current. When the button cell is processed, damage to a machine can be greatly influenced, meanwhile, electrolyte leakage can be caused due to poor sealing performance of the button cell, and the button cell is dangerous and harmful to health of people.

Disclosure of Invention

In order to overcome the shortcoming and the not enough that exist among the prior art, the utility model aims to provide a button cell, this button cell has overcome and has set up anodal net in the button cell in the past and has influenced the problem of the discharge current size at the easy consume resistance of use, has prolonged life, still has the characteristics that electric conductive property is good and low in production cost.

The purpose of the utility model is realized through the following technical scheme: a button battery comprises a negative electrode shell, a positive electrode cover, a negative electrode lithium sheet, a diaphragm, a positive electrode sheet and a conductive adhesive layer, wherein the lower end face of the negative electrode lithium sheet is attached to the upper end face of an inner cavity of the negative electrode shell, the lower end face of the diaphragm is attached to the upper end face of the negative electrode lithium sheet, the lower end face of the positive electrode sheet is attached to the upper end face of the diaphragm, the upper end face of the positive electrode sheet is coated with the conductive adhesive layer, the upper end face of the conductive adhesive layer is attached to the lower end face of the inner cavity of the positive electrode cover, the negative electrode shell is clamped in the positive electrode cover, and the edge clamping position of the negative electrode shell and the edge clamping position of the positive electrode cover are; furthermore, the conductive adhesive layer is a mixed coating of silver paste, copper paste and graphite.

Further, the cathode shell is a flanging cover, the flanging cover is clamped in the anode cover, and the clamping positions are connected in a sealing mode through injection molding plastic parts; furthermore, the flanging of the flanging cover is of an outwards-flanging structure.

Further, positive electrode powder is embedded in the positive electrode plate; further, the positive electrode powder is graphite.

Furthermore, the negative electrode lithium plate, the diaphragm, the positive plate and the conductive adhesive layer are all cylindrical structures.

Further, the surface of the negative electrode lithium sheet is plated with nickel.

The beneficial effects of the utility model reside in that: the utility model discloses a button cell simple structure has overcome through the conductive adhesive layer that sets up in the past that button cell sets up anodal net and has influenced the problem of the electric current size that discharges in the easy consume of use, has prolonged button cell's life and has promoted electric conductive property, in addition, can reduce button cell's the equipment degree of difficulty through crossing the fixed negative-pole shell of injection molding glue spare and anodal lid, is favorable to improving the productivity effect, is applicable to the industrial production.

Drawings

Fig. 1 is a schematic sectional structure of the present invention.

The reference signs are: 1-negative electrode shell, 2-positive electrode cover, 3-negative electrode lithium sheet, 4-diaphragm, 5-positive electrode sheet, 6-conductive adhesive layer and 7-injection plastic piece.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and the accompanying fig. 1, which are not intended to limit the present invention.

Referring to fig. 1, the button cell comprises a negative electrode shell 1 and a positive electrode cover 2, and further comprises a negative electrode lithium sheet 3, a diaphragm 4, a positive electrode sheet 5 and a conductive adhesive layer 6, wherein the lower end face of the negative electrode lithium sheet 3 is attached to the upper end face of the inner cavity of the negative electrode shell 1, the lower end face of the diaphragm 4 is attached to the upper end of the negative electrode lithium sheet 3, the lower end face of the positive electrode sheet 5 is attached to the upper end face of the diaphragm 4, the upper end face of the positive electrode sheet 5 is coated with the conductive adhesive layer 6, the upper end face of the conductive adhesive layer 6 is attached to the lower end face of the inner cavity of the positive electrode cover 2, the negative electrode shell 1 is clamped in the positive electrode cover 2, and the edge clamping position of the negative electrode shell 1 and the positive electrode cover 2 is in sealing connection; furthermore, the conductive adhesive layer 6 is a mixed coating of silver paste, copper paste and graphite; the surface of the negative electrode lithium sheet 3 is plated with nickel.

The button battery in the embodiment is simple in structure, the problem that a positive electrode net arranged in the button battery is easy to wear in the using process and affects the magnitude of discharging current is solved through the arranged conductive adhesive layer 6, the service life of the button battery is prolonged, the conductivity is improved, in addition, the assembling difficulty of the button battery can be reduced by fixing the negative electrode shell 1 and the positive electrode cover 2 through the injection molding adhesive piece 7, the production benefit is favorably improved, and the button battery is suitable for industrial production; the peripheral edge of the diaphragm 4 is sealed by the injection molding plastic part 7 and the inner side wall of the cathode shell 1, so that electric leakage can be effectively prevented; the conductive adhesive layer 6 adopts a mixed coating of silver paste, copper paste and graphite, so that the resistance loss can be reduced, and the working current of the button cell can be remarkably increased; in addition, nickel is plated on the surface of the negative electrode lithium sheet 3, so that the hardness and the scratch-resistant effect of the button battery can be improved by utilizing the hardness of the nickel.

In this embodiment, the negative electrode can 1 is a flanging cover, the flanging of the flanging cover is of an outward flanging structure, and the flanging cover is clamped in the positive electrode cover 2 and the clamping position is hermetically connected through the injection molding plastic part 7.

In the embodiment, the outward flanging negative electrode shell 1 is favorable for sealing connection of the injection molding piece 7 when being clamped in the positive electrode cover 2, so that a good sealing effect is achieved, and the problems of electric leakage and the like are effectively avoided.

In this embodiment, positive electrode powder is embedded in the positive electrode sheet 5, and preferably, the positive electrode powder is graphite. The negative electrode lithium plate 3, the diaphragm 4, the positive plate 5 and the conductive adhesive layer 6 are all of cylindrical structures.

The above-mentioned embodiment is the utility model discloses the implementation of preferred, in addition, the utility model discloses can also realize by other modes, not deviating from the utility model discloses any obvious replacement is all within the protection scope under the prerequisite of design.

Claims

1. The button battery comprises a negative electrode shell and a positive electrode cover, and is characterized in that: still include negative pole lithium piece, diaphragm, positive plate and conductive adhesive layer, the lower terminal surface of negative pole lithium piece laminate in the up end of negative pole shell inner chamber, the lower terminal surface of diaphragm laminate in the upper end of negative pole lithium piece, the lower terminal surface of positive plate laminate in the up end of diaphragm, the up end of positive plate is coated with conductive adhesive layer, conductive adhesive layer's up end with the laminating of the lower terminal surface of positive plate cover inner chamber, the negative pole shell block in the positive plate cover, just negative pole shell and positive plate cover edge joint position are through injection molding glue spare sealing connection.

2. A button cell according to claim 1, wherein: the cathode shell is a flanging cover, the flanging cover is clamped in the anode cover, and the clamping position is in sealing connection through an injection molding plastic piece.

3. A button cell according to claim 2, wherein: the flanging of the flanging cover is of an outward flanging structure.

4. A button cell according to claim 1, wherein: and positive powder is embedded in the positive plate.

5. A button cell according to claim 4, wherein: the positive electrode powder is graphite.

6. A button cell according to claim 1, wherein: the negative electrode lithium sheet, the diaphragm, the positive electrode sheet and the conductive adhesive layer are all of cylindrical structures.