CN101290987A - Minus pole of coin type lithium battery, preparing method thereof and coin type lithium battery comprising the minus pole - Google Patents
Minus pole of coin type lithium battery, preparing method thereof and coin type lithium battery comprising the minus pole Download PDFInfo
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- CN101290987A CN101290987A CN 200810053427 CN200810053427A CN101290987A CN 101290987 A CN101290987 A CN 101290987A CN 200810053427 CN200810053427 CN 200810053427 CN 200810053427 A CN200810053427 A CN 200810053427A CN 101290987 A CN101290987 A CN 101290987A
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- negative pole
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Abstract
The invention discloses a coin type lithium battery negative pole, which comprises a negative pole body provided with a lower end face connected with a negative cap of the coin type lithium battery and an upper end face connected with an insulating film of the coin type lithium batter, wherein the upper end face is uneven. The invention also discloses a method for processing the coin type lithium battery negative pole, which is to process uneven flutes or drop pits and bumps to press metallic lithium to be fully filled in a bottom surface of the negative cap and to be combined with the negative cap tightly so as to form an uneven negative upper end. The invention also discloses a coin type battery having the negative pole. The coin type battery of the invention allows a lithium negative pole material to discharge fully as the storage of electrolyte, the discharge area of the negative pole and the activity pf the negative pole are increased. Therefore, the initial electric potential and discharge performance of disposable lithium batteries is improved, and the capacity and life-span of the lithium batteries are increased.
Description
Technical field
The present invention relates to a kind of button lithium battery, relate in particular to a kind of negative pole and processing method and the button lithium battery that comprises this negative pole of button lithium battery.
Background technology
At present, a button lithium battery negative pole metal lithium sheet surface all is the plane.Its production assembly method has two kinds, and first method is by hand the lithium band to be die-cut into the lithium disk to put into the negative cover that welds negative pole currect collecting net by hand, and is again that lithium disk and negative pole currect collecting net is compressed together.Second method be with mechanical means with lithium band resquaring sheet, put into the negative cover of no negative pole currect collecting net, pattern tool punching press die forging makes the lithium sheet form disk and negative cover is combined into one.
Adopting the negative pole lithium sheet surface of these two kinds of method assemblings all is the plane.First method, because the lithium sheet is being put into the negative cover process, be exposed in the dry air, activity because of lithium metal, airborne water, oxygen, nitrogen etc. can form oxidation to lithium sheet surface at short notice, form oxide layer on lithium sheet surface, thereby increase the resistance on battery cathode surface, reduce the discharge activity of negative pole.Cause lithium battery initial stage electromotive force on the low side.Reduce cell discharge performance.When second method, square lithium sheet formed circular piece under pressure, the situation of whole negative cover bottom surface often appearred being not fully filled.Therefore negative pole lithium sheet exoelectrical reaction area reduces, and reduces cell discharge performance.
Summary of the invention
Purpose of the present invention provides a kind of button lithium battery that can improve the button lithium battery negative pole of cell discharge performance and comprise this negative pole just in order to overcome above-mentioned deficiency of the prior art.The present invention also provides the processing method of this negative pole in addition.
First technical scheme of the present invention is: a kind of button lithium battery negative pole, comprise the negative pole body, the upper surface that described negative pole body is provided with the lower surface that joins with the negative cover of button lithium battery and joins with the barrier film of button lithium battery, described upper surface is rough.
Described upper surface is provided with to recessed a plurality of grooves.
Described upper surface is provided with to recessed a plurality of nets hole.
The mean depth of described groove is 0.05～0.3mm; Average headway is 0.1～0.3mm.
The cross section of described a plurality of grooves is concentric circles or intersects circle shape or zigzag shape or parallel wire or netted layout.
The distribution in described a plurality of nets hole is concentric circles or lattice-like.
The vertical section of described groove is shaped as triangle trapezoidal or circular or zigzag or corrugation shape.
What described each net was cheated is shaped as cylindrical or truncated cone-shaped or terrace with edge shape or segment shape.
Second technical scheme of the present invention is: a kind of button lithium battery, comprise button anode cover and button negative cover, be provided with positive pole and negative pole in the housing, be provided with barrier film between the positive and negative electrode, be soaked with electrolyte in positive pole and the barrier film, be provided with positive polar net between positive pole and the anode cover, described negative pole is above one of the button lithium battery negative pole in the technical scheme of addressing.
The 3rd technical scheme of the present invention is: a kind of method of making described button lithium battery negative pole, earlier with lithium band resquaring sheet or circular piece, put into negative cover, adopt diel that square or circular lithium sheet is struck out disk and the full negative cover of casting bottom, the punching press end face of described diel is rough, when forming the upper surface of this negative pole, make the upper surface of this negative pole form uneven like this.
The invention has the beneficial effects as follows: by processing rough ditch rib or pit and projection at the punching press end face of diel, make lithium metal fully be full of the bottom surface of whole negative cover under pressure, and be closely linked with negative cover, form rough negative pole upper surface simultaneously.
The cathode of lithium battery that adopts this method to make because its upper surface is uneven, helps improving the storage capacity of electrolyte.The negative pole upper surface produces deformation under pressure in pressure die forging deformation process, form male and fomale(M﹠F), and surface area increases relatively.Increase the exoelectrical reaction area, strengthened discharge performance.
The negative pole upper surface in the stamping die forging process, when forming concavo-convex deformation because the local elongation distortion, make the negative pole upper surface in the course of processing because steam and the formed oxide layer of the caused oxidation of oxygen are destroyed falls.Therefore the battery cathode surface activity increases, and impedance reduces.The internal resistance of cell is reduced.
The lithium battery that the lithium cell negative pole that uses the upper surface to have uneven surface is made, because the increase of electrolyte storage capacity and the increasing of negative discharge response area, and the increase of negative electrode active, lithium cell negative pole material can fully be participated in exoelectrical reaction.Therefore can improve the initial stage electromotive force and the discharge performance of disposable lithium-battery greatly.Improve lithium battery capacity and useful life.The lithium battery that adopts the present invention to make, initial discharge voltage can improve 10%.Example: rated voltage is that the initial voltage of the general button lithium battery of 3V is generally 3.2 ± 0.2V; And use the isostructure lithium battery initial voltage of manufacturing of the present invention can reach 3.5 ± 0.1V. and properties of product and steady quality.
When producing a button lithium battery at negative cover weldering negative pole currect collecting net and with circular lithium sheet, the negative pole that has uneven surface by the method for the invention manufacturing, use the lithium battery of manual welding negative pole currect collecting weldering net, its performance is with of the present invention not contain the lithium battery performance that the negative pole weldering nets identical.All than the lithium battery initial potential of common plane end face negative pole manufacturing high about 10%.
Description of drawings
Fig. 1-the 1st, the structural representation of button lithium battery negative pole embodiment 1 of the present invention;
Fig. 1-2 is the structural representation of button lithium battery negative pole embodiment 2 of the present invention;
Fig. 1-the 3rd, the structural representation of button lithium battery negative pole embodiment 3 of the present invention;
Fig. 2-the 1st, the structural representation of button lithium battery negative pole embodiment 4 of the present invention;
Fig. 1-the 4th, the vertical view of Fig. 1-1, Fig. 1-2, Fig. 1-3;
Fig. 1-the 5th, the vertical view of Fig. 1-1, Fig. 1-2, Fig. 1-3;
Fig. 1-the 6th, the vertical view of Fig. 1-1, Fig. 1-2, Fig. 1-3;
Fig. 2-the 2nd, the vertical view of Fig. 2-1;
Fig. 3 is the structural representation of button lithium battery of the present invention.
Reference numeral: 1, anode cover, 2, sealing ring, 3, negative pole, 3-1, groove, 3-2, net hole, 4, barrier film, 5, positive pole, 6, positive polar net, 7 negative electrode casings.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described:
See also Fig. 1-1, Fig. 1-2, Fig. 1-3, Fig. 1-4, Fig. 1-5, Fig. 1-6, Fig. 2-1, Fig. 2-2.
A kind of button lithium battery negative pole of the present invention comprises the negative pole body, the upper surface that described negative pole body is provided with the lower surface that joins with the negative cover of button lithium battery and joins with the barrier film of button lithium battery, and described upper surface is rough.
As Fig. 1-1, negative pole 3 upper surfaces are provided with to recessed a plurality of groove 3-1, and the mean depth of described groove is 0.05～0.3mm, and average headway is 0.1～0.3mm.The cross section of described a plurality of grooves can be concentric circles, shown in Fig. 1-4; The cross section of groove also can be netted layout, shown in Fig. 1-5; The cross section of groove also can be parallel wire to be arranged, shown in Fig. 1-6; The cross section of groove also can be and intersect circle shape or zigzag shape etc.The vertical section of described groove is shaped as semicircle.
Embodiment 2:
As Fig. 1-2, negative pole 3 upper surfaces are provided with to recessed a plurality of groove 3-1, and the vertical section of groove is shaped as triangle as different from Example 1, and other technical characterictic is identical.
Embodiment 3:
As Fig. 1-3, negative pole 3 upper surfaces are provided with to recessed a plurality of groove 3-1, and the vertical section of groove is shaped as zigzag as different from Example 1, and other technical characterictic is identical.
The vertical section shape of groove also can be trapezoidal, corrugation shape etc.
Embodiment 4:
Shown in Fig. 2-1, negative pole 3 upper surfaces are provided with to recessed a plurality of nets hole 3-2, and the mean depth in described net hole is 0.05～0.3mm, and average headway is 0.1～0.3mm.The layout in described net hole can be lattice-like, shown in Fig. 2-2, also can be concentric circles or parallel wire or netted.The shape in described each net hole can be cylindrical or truncated cone-shaped or terrace with edge shape or segment shape.
Make the method for described button lithium battery negative pole, earlier with lithium band resquaring sheet or circular piece, put into negative cover, adopt diel that square or circular lithium sheet is struck out disk and the full negative cover of casting bottom, it is characterized in that, the punching press end face of described diel is rough, and when forming the upper surface of this negative pole, the upper surface that makes this negative pole is rough like this.
See also Fig. 3, comprise the button lithium battery of addressing cathode of lithium battery, comprise button anode cover 1 and button negative cover 7, be provided with positive pole 5 and negative pole 3 in the housing, be provided with barrier film 4 between the positive and negative electrode, be soaked with electrolyte in positive pole and the barrier film, be provided with positive polar net 6 between positive pole 5 and the anode cover 1, described negative pole 3 is rough with the upper surface that barrier film 4 joins.The structure of negative pole upper surface can adopt any form of above-mentioned button lithium battery negative pole.
Although in conjunction with the accompanying drawings the preferred embodiments of the present invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away under the scope situation that aim of the present invention and claim protect, can also make a lot of forms, these all belong within protection scope of the present invention.
Claims (10)
1. a button lithium battery negative pole comprises the negative pole body, described negative pole body be provided with the lower surface that joins with the negative cover of button lithium battery and with the upper surface that the barrier film of button lithium battery joins, it is characterized in that described upper surface is rough.
2. button lithium battery negative pole according to claim 1 is characterized in that, described upper surface is provided with to recessed a plurality of grooves.
3. button lithium battery negative pole according to claim 1 is characterized in that, described upper surface is provided with to recessed a plurality of nets hole.
4. button lithium battery negative pole according to claim 2 is characterized in that, the mean depth in described groove and net hole is 0.05～0.3mm, and average headway is 0.1～0.3mm.
5. button lithium battery negative pole according to claim 2 is characterized in that, the cross section of described a plurality of grooves is concentric circles or intersects circle shape or zigzag shape or parallel wire or netted layout.
6. button lithium battery negative pole according to claim 3 is characterized in that, the distribution in described a plurality of nets hole is concentric circles or lattice-like.
7. button lithium battery negative pole according to claim 5 is characterized in that, the vertical section of described groove is shaped as triangle trapezoidal or semicircle or zigzag or corrugation shape.
8. button lithium battery negative pole according to claim 6 is characterized in that, what described each net was cheated is shaped as cylindrical or truncated cone-shaped or terrace with edge shape or segment shape.
9. button lithium battery, comprise button anode cover and button negative cover, be provided with positive pole and negative pole in the housing, be provided with barrier film between the positive and negative electrode, be soaked with electrolyte in positive pole and the barrier film, be provided with positive polar net between positive pole and the anode cover, it is characterized in that, described negative pole is the described button lithium battery negative pole of one of claim 1 to 8.
10. method of making the described button lithium battery negative pole of claim 1, earlier with lithium band resquaring sheet or circular piece, put into negative cover, adopt diel that square or circular lithium sheet is struck out disk and the full negative cover of casting bottom, it is characterized in that, the punching press end face of described diel is rough, and when forming the upper surface of this negative pole, the upper surface that makes this negative pole is rough like this.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810053427 CN101290987A (en) | 2008-06-05 | 2008-06-05 | Minus pole of coin type lithium battery, preparing method thereof and coin type lithium battery comprising the minus pole |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200810053427 CN101290987A (en) | 2008-06-05 | 2008-06-05 | Minus pole of coin type lithium battery, preparing method thereof and coin type lithium battery comprising the minus pole |
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| CN101290987A true CN101290987A (en) | 2008-10-22 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201401A (en) * | 2014-08-14 | 2014-12-10 | 谢长晴 | Lithium-manganese button battery and button battery positive plate |
| CN105552348A (en) * | 2015-11-23 | 2016-05-04 | 天津赫维科技有限公司 | Making method of 3V chargeable button lithium battery lithium-aluminum alloy negative electrode |
| CN108886150A (en) * | 2017-01-16 | 2018-11-23 | 株式会社Lg化学 | The manufacturing method of secondary battery cathode and the cathode comprising lithium metal layer and its protective layer with fine pattern |
| WO2019061317A1 (en) * | 2017-09-27 | 2019-04-04 | 惠州市惠德瑞锂电科技股份有限公司 | Lithium primary battery having high discharge effect and good safety |
| CN109659490A (en) * | 2019-01-07 | 2019-04-19 | 宁波必霸能源有限公司 | Button cell cathode of lithium molding equipment and forming method |
| CN110085905A (en) * | 2019-05-16 | 2019-08-02 | 湖北锂诺新能源科技有限公司 | A kind of honeycomb lithium ion battery and preparation method thereof |
| CN112216816A (en) * | 2019-07-11 | 2021-01-12 | 比亚迪股份有限公司 | Lithium metal cathode, preparation method thereof and lithium ion battery |
| CN112802997A (en) * | 2021-02-24 | 2021-05-14 | 华南理工大学 | Lithium metal battery with curved surface lithium piece negative pole |
| CN113540483A (en) * | 2021-07-19 | 2021-10-22 | 宜昌力佳科技有限公司 | Battery assembly method with on-line sheet-making molding rapid permeation imbibition |
-
2008
- 2008-06-05 CN CN 200810053427 patent/CN101290987A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201401A (en) * | 2014-08-14 | 2014-12-10 | 谢长晴 | Lithium-manganese button battery and button battery positive plate |
| CN105552348A (en) * | 2015-11-23 | 2016-05-04 | 天津赫维科技有限公司 | Making method of 3V chargeable button lithium battery lithium-aluminum alloy negative electrode |
| CN105552348B (en) * | 2015-11-23 | 2018-03-30 | 天津赫维科技有限公司 | A kind of 3V can fill the preparation method of button lithium battery lithium-aluminium alloy negative pole |
| CN108886150A (en) * | 2017-01-16 | 2018-11-23 | 株式会社Lg化学 | The manufacturing method of secondary battery cathode and the cathode comprising lithium metal layer and its protective layer with fine pattern |
| WO2019061317A1 (en) * | 2017-09-27 | 2019-04-04 | 惠州市惠德瑞锂电科技股份有限公司 | Lithium primary battery having high discharge effect and good safety |
| CN109659490B (en) * | 2019-01-07 | 2024-03-26 | 宁波必霸能源有限公司 | Button cell lithium negative electrode forming equipment and forming method |
| CN109659490A (en) * | 2019-01-07 | 2019-04-19 | 宁波必霸能源有限公司 | Button cell cathode of lithium molding equipment and forming method |
| CN110085905A (en) * | 2019-05-16 | 2019-08-02 | 湖北锂诺新能源科技有限公司 | A kind of honeycomb lithium ion battery and preparation method thereof |
| CN112216816A (en) * | 2019-07-11 | 2021-01-12 | 比亚迪股份有限公司 | Lithium metal cathode, preparation method thereof and lithium ion battery |
| CN112802997A (en) * | 2021-02-24 | 2021-05-14 | 华南理工大学 | Lithium metal battery with curved surface lithium piece negative pole |
| CN112802997B (en) * | 2021-02-24 | 2022-05-24 | 华南理工大学 | Lithium metal battery with curved surface lithium piece negative pole |
| WO2022179107A1 (en) * | 2021-02-24 | 2022-09-01 | 华南理工大学 | Lithium metal battery having curved lithium sheet negative electrode |
| CN113540483A (en) * | 2021-07-19 | 2021-10-22 | 宜昌力佳科技有限公司 | Battery assembly method with on-line sheet-making molding rapid permeation imbibition |
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Open date: 20081022 |