CN107785534A - Li-Mn button cell negative pole top and li-Mn button cell and processing method - Google Patents
Li-Mn button cell negative pole top and li-Mn button cell and processing method Download PDFInfo
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- CN107785534A CN107785534A CN201711045842.9A CN201711045842A CN107785534A CN 107785534 A CN107785534 A CN 107785534A CN 201711045842 A CN201711045842 A CN 201711045842A CN 107785534 A CN107785534 A CN 107785534A
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- wall
- negative pole
- positive pole
- button cell
- sidepieces
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/06—Electrodes for primary cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/14—Cells with non-aqueous electrolyte
-
- 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
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Primary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses li-Mn button cell negative pole top and li-Mn button cell and processing method, li-Mn button cell includes positive pole cup, negative pole top, sealing ring, lithium metal, positive pole cake, barrier film and electrolyte, separated between positive pole cake and lithium metal by barrier film, insulated between positive pole cup and negative pole top by sealing ring, electrolyte be filled in negative pole top and positive pole cup into cavity in, negative pole top includes top and all sidepieces, and all sidepieces include the annular inner wall and flange wall of integrally connected；Briquetting with pressure surface under annular is applied into downward active force to flange wall, making all sidepieces on negative pole top, the outer enlarging-angle of all sidepieces is 56 degree, and annular inner wall is brought into close contact with flange wall in the structure for being in from top to bottom outward-dipping expansion；Then lithium metal, barrier film, electrolyte, positive pole cake and positive pole cup, bending positive pole cup are sequentially placed into negative pole top, sealing ring bending is encased negative pole top by positive pole cup upper edge, completes li-Mn button cell assembling.
Description
Technical field
The present invention relates to a kind of button battery, more particularly, to a kind of li-Mn button cell negative pole top and lithium manganese button electricity
Pond and processing method.
Background technology
In li-Mn button cell production process, it is a kind of larger test to battery leak resistance.Li-Mn button cell
Including positive pole cup, negative pole top, sealing ring, lithium metal, positive pole cake, barrier film and electrolyte, between positive pole cake and lithium metal by every
Film separates, and is insulated between positive pole cup and negative pole top by sealing ring.The production technology of li-Mn button cell is as follows：In negative pole top
Lithium metal, barrier film, electrolyte, positive pole cake and positive pole cup are sequentially placed into, bending processing then is carried out to positive pole cup, utilizes positive pole cup
Upper edge sealing ring bending is encased into negative pole top, so as to complete the assembling of li-Mn button cell.
The structure chart on the negative pole top of current traditional li-Mn button cell is as shown in figure 1, the flange on negative pole top is with horizontal plane
Vertical, while be not bonded completely between flange and inner side edge, therefore an interspace L be present, and flange angle a is right angle, such as
Shown in Fig. 1.There are the following problems for the button cell of the structure：
1st, due to the flange and horizontal plane on the negative pole top, battery in sealing can by the extruding force of a transverse direction,
Negative pole top can concave because of stress, cause scrapping for battery.
2nd, because flange angle is right angle, the sharp comer (right angle) is produced when being cut off by material, and due to cell shoulder
Locate sealing ring even to be ruptured by the obvious crimp of sharp comer, cause battery leak resistance bad.
3rd, because battery liquid-filling is completely full of, battery electrolyte in sealing can be extruded.So, electrolyte will be
Remained at gap L, cause the later stage in use, because during the electrolyte moisture absorption, the material for having white separates out, and causes " virtual leak " existing
As.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of li-Mn button cell negative pole top of good leak-proof effect, enter one
Step provides a kind of li-Mn button cell using the negative pole top, and the processing method on li-Mn button cell negative pole top.
Technical scheme is used by the present invention solves above-mentioned technical problem：Li-Mn button cell negative pole top, including top
With all sidepieces, described all sidepieces include the annular inner wall and flange wall of integrally connected, it is characterised in that described all sidepieces are in
It is in the structure of outward-dipping expansion from top to bottom, the outer enlarging-angles of described all sidepieces is 5-6 degree, described annular inner wall and flange
Mutually pressed together between wall.
Further preferred scheme is the present invention：It is in circular shape on the outside of the upper end of described flange wall.
Further preferred scheme is the present invention：Described annular inner wall includes hypomere wall and upper inclined wall, under described
Mutually pressed together between Duan Biyu flange walls, and the outer enlarging-angle that hypomere wall forms a whole with flange wall is 5-6 degree.
Further preferred scheme is the present invention：Li-Mn button cell, including positive pole cup, negative pole top, sealing ring, lithium gold
Category, positive pole cake, barrier film and electrolyte, are separated by barrier film between positive pole cake and lithium metal, passed through between positive pole cup and negative pole top
Sealing ring insulate, described electrolyte be filled in negative pole top and positive pole cup into cavity in, described negative pole top includes top
With all sidepieces, described all sidepieces include the annular inner wall and flange wall of integrally connected, it is characterised in that described all sidepieces are in
It is in the structure of outward-dipping expansion from top to bottom, the outer enlarging-angles of described all sidepieces is 5-6 degree, described annular inner wall and flange
Mutually pressed together between wall.
Further preferred scheme is the present invention：It is in circular shape on the outside of the upper end of described flange wall.
Further preferred scheme is the present invention：Described annular inner wall includes hypomere wall and upper inclined wall, under described
Mutually pressed together between Duan Biyu flange walls, and the outer enlarging-angle that hypomere wall forms a whole with flange wall is 5-6 degree.
Further preferred scheme is the present invention：The processing method of li-Mn button cell, it is characterised in that including following step
Suddenly：1) a negative pole top is prepared, negative pole top includes top and all sidepieces, and described all sidepieces include the annular inner wall of integrally connected
With flange wall, flange wall is perpendicular to horizontal plane, and annular inner wall has certain gap with flange wall, and annular inner wall includes hypomere
Wall and upper inclined wall；
2) briquetting is prepared, described briquetting has pressure surface under the annular at angle of inclination, and described annular pushes
Face is horizontal by the angle of 4-5 degree, and the level height of the lower pressure surface of annular is by increasing inside outside, using under the annular of the briquetting
Pressure surface applies a downward active force to flange wall so that described hypomere wall is mutually extruded so that described with flange wall
Gap eliminates, while it is 5-6 degree to make hypomere wall that an outer enlarging-angle be integrally formed as one with flange wall；
3) lithium metal, barrier film, electrolyte, positive pole cake and positive pole cup are sequentially placed into negative pole top, then positive pole cup is entered
Row bending is handled, and sealing ring bending is encased into negative pole top using the upper edge of positive pole cup, so as to complete the group of li-Mn button cell
Dress
Compared with prior art, the outer enlarging-angle of all sidepieces on advantages of the present invention negative pole top is 5-6 degree, in positive pole cup bending
During bound edge processing, negative pole top will not cave inward because of stress.
Simultaneously as after being pressed together between flange wall and annular inner wall, and disappearance is stitched, and during battery liquid-filling, electricity
Solution liquid will not negative pole top and stitch in remain, do not have virtual leak phenomenon generation.
It is in circular shape on the outside of the upper end of other flange wall, when positive pole cup bending bound edge is handled, due to disappearing for sharp comer
Lose, sealing ring will not be damaged, further prevent the generation of the phenomenon of leakage.
Brief description of the drawings
Fig. 1 is the structural representation on negative pole top in the prior art；
Fig. 2 is the structural representation of the li-Mn button cell before assembling in the prior art；
Fig. 3 is the structural representation of the li-Mn button cell after assembling in the prior art；
Fig. 4 is the structural representation on the negative pole top that briquetting is acted on before flange wall in the present invention；
Fig. 5 is the structural representation on the negative pole top that briquetting acts on flange wall thickness in the present invention；
Fig. 6 is the structural representation of the li-Mn button cell before present invention assembling；
Fig. 7 is the structural representation of the li-Mn button cell after present invention assembling.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing embodiment.
Current traditional li-Mn button cell, including positive pole cup 2, negative pole top 3, sealing ring 4, lithium metal 7, positive pole cake 5, barrier film
6 and electrolyte, separated between positive pole cake 5 and lithium metal 7 by barrier film 6, it is exhausted by sealing ring 4 between positive pole cup 2 and negative pole top 3
Edge, electrolyte are filled in the cavity that negative pole top 3 is formed with positive pole cup 2, and wherein the structure chart on negative pole top 3 is as shown in figure 1, negative pole
Top 3 includes top 8 and all sidepieces 9, and all sidepieces 9 include the annular inner wall 91 and flange wall 92 of integrally connected, the flange on negative pole top 3
Wall 92 is vertical with horizontal plane, while is not bonded completely between flange wall 92 and annular inner wall 91, therefore is existed between one
Gap L, and flange angle a is right angle.As shown in Fig. 2 because flange angle a is right angle, sealing ring 4 can be by sharp comer at cell shoulder
Obvious crimp even ruptures, and causes battery leak resistance bad；And battery liquid-filling is completely full of, as shown in figure 3, battery exists
Electrolyte, which can be extruded, during sealing comes, and so, electrolyte will remain at gap L, causes the later stage in use, because electrolyte
During the moisture absorption, the material for having white separates out, and causes " virtual leak " phenomenon.
Further, since the flange wall 92 and horizontal plane on the negative pole top 3, battery can be by a transverse direction in sealing
Extruding force, negative pole top 3 can concave because of stress, cause scrapping for battery.
For the present invention in order to solve above-mentioned problems of the prior art, embodiment is as follows：As shown in fig. 6, lithium
Mn button battery 1, including positive pole cup 2, negative pole top 3, sealing ring 4, lithium metal 7, positive pole cake 5, barrier film 6 and electrolyte, positive pole cake 5
Separated, insulated between positive pole cup 2 and negative pole top 3 by sealing ring 4, electrolyte is filled in negative by barrier film 6 between lithium metal 7
In the cavity that pole top 3 is formed with positive pole cup 2, as shown in figure 5, negative pole top 3 includes top 8 and all sidepieces 9, all sidepieces 9 include one
The annular inner wall 91 and flange wall 92 of body connection, the structure that it is in outward-dipping expansion from top to bottom that all sidepieces 9, which are in, all sidepieces 9
Outer enlarging-angle is 5-6 degree, is mutually pressed together between annular inner wall 91 and flange wall 92.All sidepieces 9 are in from top to bottom in outside
The structure of expansion is tilted, the flange wall 92 and horizontal plane because of the negative pole top 3 can be prevented, causes battery can be by sealing
To the extruding force of a transverse direction, negative pole top 3 can concave because of stress, cause being produced the problem of scrapping for battery.
It is in circular shape 13 on the outside of the upper end of flange wall 92.The upper end of flange wall 92 of circular shape 13 can prevent battery shoulder
Sealing ring 4 is even ruptured by the sharp angle extruding deforming of flange in the prior art on flange wall 92 at portion, causes battery anti-leakage
Can be bad the problem of, produces.
As shown in figure 5, annular inner wall 91 includes hypomere wall 911 and upper inclined wall 912, hypomere wall 911 and flange wall 92 it
Between mutually press together, and the outer enlarging-angle that hypomere wall 911 and flange wall 92 form a whole is 5-6 degree.
The processing method of li-Mn button cell, it is characterised in that comprise the following steps：
1) a negative pole top 3 is prepared, as shown in figure 4, negative pole top 3 includes top 8 and all sidepieces 9, all sidepieces 9 include one
The annular inner wall 91 and flange wall 92 of connection, flange wall 92 is perpendicular to horizontal plane, and annular inner wall 91 has one with flange wall 92
Fixed gap L, as shown in figure 4, annular inner wall 91 includes hypomere wall 911 and upper inclined wall 912；Now, turning on flange wall 92
Corner a is right angle.
2) as shown in figure 4, preparing a briquetting 10, pressure surface 11 under annular of the briquetting 10 with an angle of inclination, annular
Lower pressure surface 11 is horizontal by the angle of 4-5 degree, and the level height of the lower pressure surface 11 of annular utilizes the briquetting by increasing inside outside
Pressure surface 11 applies a downward active force to flange wall 92 under 10 annular, as shown in Figure 5 so that hypomere wall 911 and flange
The mutually extruding of wall 92 is so that gap L eliminates, while hypomere wall 911 is integrally formed one as one with flange wall 92 and extend out
Angle is 5-6 degree；After gap L eliminates, even if battery liquid-filling is completely full of, battery electrolyte in sealing can be extruded when coming also not
It can be remained at gap L, prevent the later stage in use, because during the electrolyte moisture absorption, cause " virtual leak " phenomenon.Make hypomere wall simultaneously
911 an outer enlarging-angle is integrally formed be 5-6 degree as one with flange wall 92, can be by a horizontal stroke when battery is sealing
To extruding force when, negative pole top 3 will not concave because of stress, cause being produced the problem of scrapping for battery.
3) lithium metal 7, barrier film 6, electrolyte, positive pole cake 5 and just as shown in Figure 6 and Figure 7, are sequentially placed into negative pole top 3
Pole cup 2, bending processing then is carried out to positive pole cup 2, the bending of sealing ring 4 is encased into negative pole top 3 using the upper edge of positive pole cup 2,
So as to complete the assembling of li-Mn button cell.
As shown in Figure 4 and Figure 5, during briquetting 10 pushes, due to that can be formed hypomere wall 911 and flange wall 92 simultaneously
One outer enlarging-angle, due to the effect of pressure surface 11 under annular, as shown in Figures 5 to 7, one can be presented on the outside of the upper end of flange wall 92
Individual general circular shape 13, when the bending bound edge of positive pole cup 2 is handled, due to the disappearance of sharp comer, sealing ring 4 will not be caused
Destroy, further prevent the generation of the phenomenon of leakage.Arc concave shape structure can also be adjusted to pressure surface 11 under the annular of briquetting 10,
So ensure that flange wall 92 forms the upper end of a circular shape 13.
Li-Mn button cell negative pole top provided by the present invention and li-Mn button cell and processing method are carried out above
It is discussed in detail, specific case used herein is set forth to the principle and embodiment of the present invention, above example
Illustrate that being only intended to help understands the present invention and core concept.It should be pointed out that come for those skilled in the art
Say, under the premise without departing from the principles of the invention, some improvement and modification can also be carried out to the present invention, these are improved and modification
Also fall into the protection domain of the claims in the present invention.
Claims (7)
1. li-Mn button cell negative pole top, including top and all sidepieces, described all sidepieces include the annular inner wall of integrally connected
With flange wall, it is characterised in that the structure that it is in outward-dipping expansion from top to bottom that described all sidepieces, which are in, described all sidepieces
Outer enlarging-angle is 5-6 degree, is mutually pressed together between described annular inner wall and flange wall.
2. li-Mn button cell negative pole top according to claim 1, it is characterised in that on the outside of the upper end of described flange wall
In circular shape.
3. li-Mn button cell negative pole top according to claim 1, it is characterised in that described annular inner wall includes hypomere
Wall and upper inclined wall, mutually pressed together between described hypomere wall and flange wall, and hypomere wall and flange wall composition one
Individual overall outer enlarging-angle is 5-6 degree.
4. li-Mn button cell, including positive pole cup, negative pole top, sealing ring, lithium metal, positive pole cake, barrier film and electrolyte, positive pole cake
Separated by barrier film between lithium metal, insulated between positive pole cup and negative pole top by sealing ring, described electrolyte is filled in
Negative pole top and positive pole cup into cavity in, described negative pole top includes top and all sidepieces, and described all sidepieces include integral
The annular inner wall and flange wall of connection, it is characterised in that the structure that it is in outward-dipping expansion from top to bottom that described all sidepieces, which are in,
The outer enlarging-angle of described all sidepieces is 5-6 degree, is mutually pressed together between described annular inner wall and flange wall.
5. li-Mn button cell according to claim 4, it is characterised in that be in circular arc on the outside of the upper end of described flange wall
Shape.
6. li-Mn button cell according to claim 4, it is characterised in that described annular inner wall includes hypomere wall and upper
Inclined wall, mutually pressed together between described hypomere wall and flange wall, and hypomere wall forms a whole with flange wall
Outer enlarging-angle be 5-6 degree.
7. the processing method of li-Mn button cell, it is characterised in that comprise the following steps：
1) a negative pole top is prepared, negative pole top includes top and all sidepieces, and described all sidepieces are included in the annular of integrally connected
Wall and flange wall, flange wall is perpendicular to horizontal plane, and annular inner wall has certain gap with flange wall, under annular inner wall includes
The upper inclined walls of Duan Bihe；
2) prepare a briquetting, described briquetting has a pressure surface under the annular at angle of inclination, under described annular pressure surface with
Horizontal plane is in the angle of 4-5 degree, and the level height of the lower pressure surface of annular utilizes pressure surface under the annular of the briquetting by increasing inside outside
One downward active force is applied to flange wall so that described hypomere wall mutually extrudes the gap so that described with flange wall
Eliminate, while it is 5-6 degree to make hypomere wall that an outer enlarging-angle be integrally formed as one with flange wall；
3) lithium metal, barrier film, electrolyte, positive pole cake and positive pole cup are sequentially placed into negative pole top, then positive pole cup is rolled over
Crook is managed, and sealing ring bending is encased into negative pole top using the upper edge of positive pole cup, so as to complete the assembling of li-Mn button cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711045842.9A CN107785534B (en) | 2017-10-31 | 2017-10-31 | Lithium manganese button cell negative pole top, lithium manganese button cell and processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711045842.9A CN107785534B (en) | 2017-10-31 | 2017-10-31 | Lithium manganese button cell negative pole top, lithium manganese button cell and processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107785534A true CN107785534A (en) | 2018-03-09 |
| CN107785534B CN107785534B (en) | 2023-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711045842.9A Active CN107785534B (en) | 2017-10-31 | 2017-10-31 | Lithium manganese button cell negative pole top, lithium manganese button cell and processing method |
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| CN (1) | CN107785534B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108550718A (en) * | 2018-06-15 | 2018-09-18 | 宜昌力佳科技有限公司 | A kind of button cell with pedestal |
| WO2021114324A1 (en) * | 2019-12-13 | 2021-06-17 | 惠州亿纬锂能股份有限公司 | Winding bean type battery |
| WO2021114329A1 (en) * | 2019-12-13 | 2021-06-17 | 惠州亿纬锂能股份有限公司 | Winding-type button cell |
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| JP2006066308A (en) * | 2004-08-30 | 2006-03-09 | Hitachi Maxell Ltd | Coin-shaped cell |
| CN101521267A (en) * | 2008-02-29 | 2009-09-02 | 肇庆新利达电池实业有限公司 | Negative cover of lithium/manganese button cell, lithium/manganese button cell and production method thereof |
| CN101944587A (en) * | 2010-08-06 | 2011-01-12 | 广州市鹏辉电池有限公司 | Lithium manganese button secondary cell cathode and cell |
| CN103050296A (en) * | 2012-12-18 | 2013-04-17 | 宁夏集盛星泰新能源科技有限公司 | Buckled dual-electric layer capacitor |
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2017
- 2017-10-31 CN CN201711045842.9A patent/CN107785534B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006066308A (en) * | 2004-08-30 | 2006-03-09 | Hitachi Maxell Ltd | Coin-shaped cell |
| CN101521267A (en) * | 2008-02-29 | 2009-09-02 | 肇庆新利达电池实业有限公司 | Negative cover of lithium/manganese button cell, lithium/manganese button cell and production method thereof |
| CN101944587A (en) * | 2010-08-06 | 2011-01-12 | 广州市鹏辉电池有限公司 | Lithium manganese button secondary cell cathode and cell |
| CN103050296A (en) * | 2012-12-18 | 2013-04-17 | 宁夏集盛星泰新能源科技有限公司 | Buckled dual-electric layer capacitor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108550718A (en) * | 2018-06-15 | 2018-09-18 | 宜昌力佳科技有限公司 | A kind of button cell with pedestal |
| CN108550718B (en) * | 2018-06-15 | 2024-01-19 | 宜昌力佳科技有限公司 | Button cell with base |
| WO2021114324A1 (en) * | 2019-12-13 | 2021-06-17 | 惠州亿纬锂能股份有限公司 | Winding bean type battery |
| WO2021114329A1 (en) * | 2019-12-13 | 2021-06-17 | 惠州亿纬锂能股份有限公司 | Winding-type button cell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107785534B (en) | 2023-07-28 |
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