CN110752401A - Button cell and manufacturing method thereof - Google Patents

Button cell and manufacturing method thereof Download PDF

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Publication number
CN110752401A
CN110752401A CN201910941330.3A CN201910941330A CN110752401A CN 110752401 A CN110752401 A CN 110752401A CN 201910941330 A CN201910941330 A CN 201910941330A CN 110752401 A CN110752401 A CN 110752401A
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CN
China
Prior art keywords
shell
lower shell
upper shell
positive
negative
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910941330.3A
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Chinese (zh)
Inventor
张良均
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHONGQING ZIJIAN ELECTRONICS CO LTD
Original Assignee
CHONGQING ZIJIAN ELECTRONICS CO LTD
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CHONGQING ZIJIAN ELECTRONICS CO LTD filed Critical CHONGQING ZIJIAN ELECTRONICS CO LTD
Priority to CN201910941330.3A priority Critical patent/CN110752401A/en
Publication of CN110752401A publication Critical patent/CN110752401A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/04Construction or manufacture in general
    • H01M10/0431Cells with wound or folded electrodes
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00Batteries for particular applications
    • H01M2220/30Batteries in portable systems, e.g. mobile phone, laptop
    • 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
    • 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
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention discloses a button cell and a manufacturing method thereof, wherein the cell comprises a conductive shell, an insulating gasket, a roll core and electrolyte, wherein the conductive shell is divided into an upper shell and a lower shell, and a sealing ring is arranged between the upper shell and the lower shell; insulation gaskets are arranged between the winding core and the upper shell and between the winding core and the lower shell, the winding core comprises a positive plate, a diaphragm and a negative plate, the diaphragm is arranged between the positive plate and the negative plate, the insulation gaskets are sleeved on the diaphragm, and a positive electrode tab of the positive plate or a negative electrode tab of the negative plate extends out of a gap of the insulation gaskets and is respectively in contact connection with the lower shell or the upper shell; the electrolyte is filled in the closed cavity. The button cell is directly connected with the lower shell or the upper shell in a contact way through the blank aluminum foil area or the blank copper foil area of the positive and negative pole pieces respectively to connect the positive and negative poles; the edges of the foil are in interference fit with the upper shell and the lower shell, and the edges of the blank metal foil can be bent and deformed to ensure tight contact with the upper shell and the lower shell to form a charging or discharging loop.

Description

Button cell and manufacturing method thereof
Technical Field
The invention belongs to the technical field of button cells, and particularly relates to a button cell and a manufacturing method thereof.
Background
At present, button batteries are increasingly widely applied to digital batteries, especially earphone batteries. Conventional button cells employ two process routes: one is made in a laminated mode, and the other is in conventional winding, and the two modes need to use a metal conductor as a connecting strip to connect a winding core or a laminated core with a shell cover. The disadvantages of the laminated approach are that the efficiency is too low and the cost of the battery is too high; the winding type has the disadvantage that the rate performance of the battery is poor, and the winding type is not suitable for large-rate quick charging. The invention has the advantages of both lamination and winding, namely good rate capability and high production efficiency.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a button cell and a manufacturing method thereof, which have the advantages of both a laminated manufacturing method and a winding manufacturing method, namely high production efficiency and good rate capability.
In order to achieve the purpose, the invention adopts the technical scheme that: a button cell comprises a conductive shell, an insulating gasket, a winding core and electrolyte, wherein the conductive shell is divided into an upper shell and a lower shell, the upper shell is buckled on the inner side of the lower shell to form a closed cavity, and a sealing ring is arranged between the upper shell and the lower shell; the winding core is arranged in a closed cavity formed by the upper shell and the lower shell, insulating gaskets are arranged between the winding core and the upper shell and between the winding core and the lower shell, the winding core comprises a positive plate, a diaphragm and a negative plate, the diaphragm is arranged between the positive plate and the negative plate, the insulating gaskets are sleeved on the diaphragm, and a positive pole lug of the positive plate or a negative pole lug of the negative plate extends out of a gap of the insulating gaskets and is respectively connected with the lower shell or the upper shell in a contact manner; the electrolyte is filled in the closed cavity.
Preferably, the positive plate comprises a positive active substance and a blank aluminum foil area, wherein the positive active substance is lithium cobaltate or a ternary material; the negative plate comprises a negative active material and a blank copper foil area, wherein the negative active material is graphite.
Preferably, the thickness of the blank aluminum foil area of the positive plate is 1-50um, and the thickness of the blank copper foil area of the negative plate is 1-50 um.
Preferably, the insulating gasket is spiral and made of insulating materials such as PP and the like, and the thickness of the insulating gasket is 0.001-5 mm.
Preferably, the contact connection between the blank aluminum foil area of the positive plate and the blank copper foil area of the lower shell and the contact connection between the blank copper foil area of the negative plate and the upper shell are single-point contact or multi-point contact.
Preferably, the electrolyte is in a liquid, solid or gel state.
The specific manufacturing method of the button cell comprises the following steps:
(1) forming a winding core by winding the positive plate, the negative plate and the diaphragm, so that a positive electrode tab and a negative electrode tab leak from two sides of the winding core;
(2) sleeving an insulating gasket on the diaphragm to enable the positive pole lug and the negative pole lug to extend out of a gap of the insulating sheet;
(3) placing the winding core in the step (2) into the lower shell of the conductive shell;
(4) buckling an upper shell of the conductive shell on a lower shell;
(5) electrolyte is filled into a closed cavity formed by the upper shell and the lower shell;
(6) and a sealing ring is arranged between the upper shell and the lower shell, and then the sealing ring is sealed by sealing oil to form the closed button cell.
Compared with the prior art, the invention has the beneficial effects that: the button cell directly connects the blank aluminum foil area of the positive plate of the winding core or the blank copper foil area of the negative plate with the lower shell or the upper shell in a contact way respectively to connect the positive and negative electrodes; the edges of the foil are in interference fit with the upper shell and the lower shell, and the edges of the blank metal foil can be bent and deformed to ensure tight contact with the upper shell and the lower shell to form a charging or discharging loop. The manufacturing method of the battery can improve the production efficiency and the rate capability of the battery.
Drawings
FIG. 1 is an overall block diagram of the present invention;
FIG. 2 is a structural view of a positive plate according to the present invention;
FIG. 3 is a structural diagram of a negative plate according to the present invention;
fig. 4 is a view showing the structure of the insulating gasket of the present invention.
In the figure: 101-upper shell, 102-lower shell, 103-sealing ring, 104-positive plate, 105-positive aluminum foil tab, 106-diaphragm, 107-negative plate, 108-negative copper foil tab, 109-insulating gasket, 201-positive active material, 202-blank aluminum foil area, 301-negative active material, 302-blank copper foil area.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
As shown in fig. 1-4, one embodiment of the present invention: a button cell comprises a conductive shell, an insulating gasket 109, a winding core and electrolyte, wherein the conductive shell is divided into an upper shell 101 and a lower shell 102, the upper shell 101 is buckled on the inner side of the lower shell 102, the size of the upper shell 101 is smaller than that of the lower shell 102, a closed cavity is formed inside the upper shell 101 and the lower shell 102 after the upper shell and the lower shell are buckled, and a sealing ring 103 is arranged between the upper shell 101 and the lower shell 102; the winding core is arranged in a closed cavity formed by the upper shell 101 and the lower shell 102, insulating gaskets 109 are arranged between the winding core and the upper shell 101 and the lower shell 102, the winding core comprises a positive plate 104, a diaphragm 106 and a negative plate 107, the diaphragm 106 is arranged between the positive plate 104 and the negative plate 107, the insulating gaskets 109 are sleeved on the diaphragm 106, a positive aluminum foil tab 105 of the positive plate 104 or a negative copper foil tab 108 of the negative plate 107 extends out of a gap of the insulating gaskets 109 and is respectively in contact connection with the lower shell 102 or the upper shell 101; the electrolyte is filled in the closed cavity. Wherein, the electrolyte can be in a liquid state, a solid state or a gel state.
Specifically, as shown in fig. 2 and 3: the positive plate 104 comprises a positive active material 201 and a blank aluminum foil area 202, and the positive active material 101 is lithium cobaltate or a ternary material; the negative electrode sheet 107 comprises a negative electrode active material 301 and a blank copper foil area 302, wherein the negative electrode active material 301 is graphite.
The thickness of the blank aluminum foil area 202 of the positive plate 104 is 1-50um, and the thickness of the blank copper foil area 302 of the negative plate 107 is 1-50 um.
As shown in fig. 4: the insulating gasket 109 is spiral and made of insulating materials such as PP and the like, and the thickness is 0.001-5 mm. The insulating gasket 109 can protect the insulation of the copper foil and the aluminum foil and ensure the close contact between the copper foil and the aluminum foil and the shell.
The blank aluminum foil area 202 of the positive plate 104 is in single-point contact or multi-point contact with the lower shell 102, and the blank copper foil area 302 of the negative plate 107 is in multi-point contact with the upper shell 101. Specifically, the blank aluminum foil area 202 and the blank copper foil area 302 may or may not be deformed when they are brought into contact with each other.
The specific manufacturing method of the button cell comprises the following steps:
(1) forming a winding core by winding the positive plate, the negative plate and the diaphragm, so that a positive electrode tab and a negative electrode tab leak from two sides of the winding core;
(2) sleeving an insulating gasket on the diaphragm to enable the positive pole lug and the negative pole lug to extend out of a gap of the insulating sheet;
(3) placing the winding core in the step (2) into the lower shell of the conductive shell;
(4) buckling an upper shell of the conductive shell on a lower shell;
(5) electrolyte is filled into a closed cavity formed by the upper shell and the lower shell;
(6) and a sealing ring is arranged between the upper shell and the lower shell, and then the sealing ring is sealed by sealing oil to form the closed button cell.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (8)

1. A button cell comprising a conductive casing, an insulating gasket (109), a winding core and electrolyte, characterized in that: the conductive shell is divided into an upper shell (101) and a lower shell (102), the upper shell (101) is buckled on the inner side of the lower shell (102) to form a closed cavity, and a sealing ring (103) is arranged between the upper shell (101) and the lower shell (102); the winding core is arranged in a closed cavity formed by the upper shell (101) and the lower shell (102), insulating gaskets (109) are arranged between the winding core and the upper shell (101) and between the winding core and the lower shell (102), the winding core comprises a positive plate (104), a diaphragm (106) and a negative plate (107), the diaphragm (106) is arranged between the positive plate (104) and the negative plate (107), the insulating gaskets (109) are sleeved on the diaphragm (106), and a positive electrode lug (105) of the positive plate (104) or a negative electrode lug (108) of the negative plate (107) extends out of a gap of the insulating gaskets (109) and is respectively in contact connection with the lower shell (102) or the upper shell (101); the electrolyte is filled in the closed cavity.
2. The button cell according to claim 1, characterized in that: the positive plate (104) comprises a positive active material (201) and a blank aluminum foil area (202), and the negative plate (107) comprises a negative active material (301) and a blank copper foil area (302).
3. The button cell according to claim 2, characterized in that: the positive electrode active material (201) is lithium cobaltate or a ternary material, and the negative electrode active material (301) is graphite.
4. The button cell according to claim 3, characterized in that: the thickness of the blank aluminum foil area (202) of the positive plate (104) is 1-50um, and the thickness of the blank copper foil area (302) of the negative plate (107) is 1-50 um.
5. The button cell according to claim 4, wherein: the insulating gasket (109) is spiral and made of PP and other insulating materials, and the thickness of the insulating gasket is 0.001-5 mm.
6. The button cell according to claim 5, characterized in that: the blank aluminum foil area (202) of the positive plate (104) is in single-point contact or multi-point contact with the lower shell (102) and the blank copper foil area (302) of the negative plate (107) is in contact with the upper shell (101).
7. Button cell according to any of claims 1 to 6, characterized in that: the electrolyte is in a liquid state, a solid state or a gel state.
8. A manufacturing method of a button cell is characterized by comprising the following steps: comprises the following steps
(1) Forming a winding core by winding the positive plate, the negative plate and the diaphragm, so that a positive electrode tab and a negative electrode tab leak from two sides of the winding core;
(2) sleeving an insulating gasket on the diaphragm to enable the positive pole lug and the negative pole lug to extend out of a gap of the insulating sheet;
(3) placing the winding core in the step (2) into the lower shell of the conductive shell;
(4) buckling an upper shell of the conductive shell on a lower shell;
(5) electrolyte is filled into a closed cavity formed by the upper shell and the lower shell;
(6) and a sealing ring is arranged between the upper shell and the lower shell, and then the sealing ring is sealed by sealing oil to form the closed button cell.
CN201910941330.3A 2019-09-30 2019-09-30 Button cell and manufacturing method thereof Pending CN110752401A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910941330.3A CN110752401A (en) 2019-09-30 2019-09-30 Button cell and manufacturing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910941330.3A CN110752401A (en) 2019-09-30 2019-09-30 Button cell and manufacturing method thereof

Publications (1)

Publication Number Publication Date
CN110752401A true CN110752401A (en) 2020-02-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910941330.3A Pending CN110752401A (en) 2019-09-30 2019-09-30 Button cell and manufacturing method thereof

Country Status (1)

Country Link
CN (1) CN110752401A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112952180A (en) * 2021-01-13 2021-06-11 中银(宁波)电池有限公司 Winding button cell with diaphragm as electrode substrate and manufacturing method
WO2021226969A1 (en) * 2020-05-14 2021-11-18 宁德新能源科技有限公司 Battery and electric apparatus having same
WO2022077961A1 (en) * 2020-10-12 2022-04-21 广东微电新能源有限公司 Solid-state button battery
CN113193274B (en) * 2021-04-14 2022-06-10 国研新能(深圳)技术有限公司 Battery and electronic equipment

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1461503A (en) * 2000-08-09 2003-12-10 松下电器产业株式会社 Coin-shaped battery
CN101728574A (en) * 2009-12-04 2010-06-09 王昉 Buckled lithium-ion storage battery with single-wall structure
JP4505569B2 (en) * 2003-01-31 2010-07-21 日伸工業株式会社 Drawing method
CN202695639U (en) * 2012-06-29 2013-01-23 广东凯德能源科技有限公司 Clamping type lithium battery
CN203631692U (en) * 2013-12-30 2014-06-04 普天新能源车辆技术有限公司 Battery
CN104332647A (en) * 2013-04-19 2015-02-04 王昉 Rechargeable lithium ion button cell battery
CN109671987A (en) * 2017-10-13 2019-04-23 北京好风光储能技术有限公司 A kind of coiling lithium slurry battery

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1461503A (en) * 2000-08-09 2003-12-10 松下电器产业株式会社 Coin-shaped battery
JP4505569B2 (en) * 2003-01-31 2010-07-21 日伸工業株式会社 Drawing method
CN101728574A (en) * 2009-12-04 2010-06-09 王昉 Buckled lithium-ion storage battery with single-wall structure
CN202695639U (en) * 2012-06-29 2013-01-23 广东凯德能源科技有限公司 Clamping type lithium battery
CN104332647A (en) * 2013-04-19 2015-02-04 王昉 Rechargeable lithium ion button cell battery
CN203631692U (en) * 2013-12-30 2014-06-04 普天新能源车辆技术有限公司 Battery
CN109671987A (en) * 2017-10-13 2019-04-23 北京好风光储能技术有限公司 A kind of coiling lithium slurry battery

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021226969A1 (en) * 2020-05-14 2021-11-18 宁德新能源科技有限公司 Battery and electric apparatus having same
WO2022077961A1 (en) * 2020-10-12 2022-04-21 广东微电新能源有限公司 Solid-state button battery
CN112952180A (en) * 2021-01-13 2021-06-11 中银(宁波)电池有限公司 Winding button cell with diaphragm as electrode substrate and manufacturing method
CN113193274B (en) * 2021-04-14 2022-06-10 国研新能(深圳)技术有限公司 Battery and electronic equipment

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Legal Events

Date Code Title Description
CB02 Change of applicant information

Address after: 405400 building 1-4, Puli industrial new area, Zhaojia street, Kaizhou District, Chongqing

Applicant after: Chongqing Zijian Electronic Co.,Ltd.

Address before: 405400 building 1-4, Puli industrial new area, Zhaojia street, Kaizhou District, Chongqing

Applicant before: CHONGQING VDL ELECTRONICS Co.,Ltd.

RJ01 Rejection of invention patent application after publication

Application publication date: 20200204