CN107508004A - A kind of high-power lithium Mn button battery and preparation method thereof - Google Patents
A kind of high-power lithium Mn button battery and preparation method thereof Download PDFInfo
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- CN107508004A CN107508004A CN201710825026.3A CN201710825026A CN107508004A CN 107508004 A CN107508004 A CN 107508004A CN 201710825026 A CN201710825026 A CN 201710825026A CN 107508004 A CN107508004 A CN 107508004A
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 230000004888 barrier function Effects 0.000 claims abstract description 42
- 239000011572 manganese Substances 0.000 claims abstract description 27
- 239000000203 mixture Substances 0.000 claims abstract description 16
- 239000003792 electrolyte Substances 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000000839 emulsion Substances 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 2
- UBXWAYGQRZFPGU-UHFFFAOYSA-N manganese(2+) oxygen(2-) titanium(4+) Chemical compound [O--].[O--].[Ti+4].[Mn++] UBXWAYGQRZFPGU-UHFFFAOYSA-N 0.000 claims 1
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 239000011149 active material Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- KLARSDUHONHPRF-UHFFFAOYSA-N [Li].[Mn] Chemical compound [Li].[Mn] KLARSDUHONHPRF-UHFFFAOYSA-N 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- IAIWVQXQOWNYOU-FPYGCLRLSA-N nitrofural Chemical compound NC(=O)N\N=C\C1=CC=C([N+]([O-])=O)O1 IAIWVQXQOWNYOU-FPYGCLRLSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000009703 powder rolling Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Primary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of high-power lithium Mn button battery and preparation method thereof, belong to button cell technical field.Including the positive plate (6) in positive cover (1), negative cover (2) and the seal cavity that is formed between positive cover (1) and negative cover (2), barrier film (7), negative plate (8) and electrolyte (4)；The reverse side of negative plate (8) is some or all of to be laid with currect collecting net (9), and the negative plate (8) that positive plate (6), barrier film (7) are laid with currect collecting net (9) with reverse side stacks the rectangular battery core (3) that folding is formed and seal cavity coordinates after composition strip battery successively；Rectangular battery core (3) is positive plate (6) close to the side of positive cover (1), and its opposite side is the negative plate (8) for being laid with currect collecting net (9)；Positive plate (6) is provided with the flow collection sheet (5) coordinated with rectangular battery core (3) to be provided with folding line (10) at the manganese electrode of wet production and folding on the inside of positive cover (1).
Description
Technical field
The invention belongs to button cell technical field, more particularly to a kind of high-power lithium Mn button battery and its preparation side
Method, the advantages of battery combines button cell and soft-package battery.
Background technology
In recent years, the development of electronic product is very fast, and the variation of its product, application field is more and more wider, many electricity
Sub- product is used in order to facilitate customer, and very high requirement, positive court are proposed to the capacity of battery used, volume and power output
Portable trend development, to meet the market demand, it is imperative to develop new ultrahigh power battery.And in the market
Its continuous discharge electric current of button cell is small, power output is low；And soft-package battery is because volume is excessive, bad mechanical strength and safety
The not high factor of property, can not meet the market demand.Therefore, it is necessary to develop a kind of ultra high power li-Mn button cell to replace passing
The button cell and soft-package battery of system, so as to solve above-mentioned several problems.The present invention develops a kind of novel super-high power lithium manganese
Button cell, it is collapsible by the way that positive plate, negative plate and barrier film are changed in the case where not influenceing button cell overall dimensions
And increase part-structure and use special folding mode so that battery still has more active matter in small space
Matter, and the reaction of the inside of battery can be also normally carried out, so as to also improve output while the capacity of battery is ensured
Power.
The content of the invention
An object of the present invention is to provide a kind of high-power lithium Mn button battery, and the battery is by by positive plate, negative
Pole piece and barrier film be changed to it is collapsible and increase part-structure and use special folding mode, can combine button cell with it is soft
The advantages of bag battery；The overall dimensions of battery are not only controlled to solve the problems, such as that common soft-package battery volume is excessive now, also solves
Determine the problem of traditional button cell discharge current is small, power output is insufficient.The second object of the present invention is the provision of foregoing
The preparation method of high-power lithium Mn button battery；The technical scheme is as follows：
On the one hand, the embodiments of the invention provide a kind of high-power lithium Mn button battery, the battery to include positive cover 1, negative cover 2
And positive plate 6, barrier film 7, negative plate 8 and electrolyte 4 in the seal cavity formed between positive cover 1 and negative cover 2；Institute
State negative plate 8 reverse side it is some or all of be laid with currect collecting net 9, the positive plate 6, barrier film 7 and reverse side are laid with currect collecting net 9
Negative plate 8 stack successively form strip battery after fold form with seal cavity coordinate rectangular battery core 3；The square
For shape battery 3 in seal cavity, it is positive plate 6 close to the side of positive cover 1, and its opposite side is to be laid with currect collecting net 9
Negative plate 8；To be provided with folding line 10 at the manganese electrode of wet production and folding, the inner side of positive cover 1 is provided with the positive plate 6
The flow collection sheet 5 coordinated with the side of rectangular battery core 3.
Wherein, the button cell in the embodiment of the present invention is circle, and the rectangular battery core 3 is square and its four angles
Act against the adjacent inboard of the inwall on the inwall of seal cavity or positioned at seal cavity.
Specifically, the positive plate 6 in the embodiment of the present invention is rectangle, and its thickness is 0.20mm-0.40mm, its scheduled width
The folding line 10 of degree is divided into 2n+1+ 1 square sub- positive plate 11.
Further, the positive plate 6 in the embodiment of the present invention is using manganese dioxide, graphite and ptfe emulsion as original
Material, using ethanol as solvent, is obtained by roller roll forming, and by laser printer types folding line 10.
Specifically, the barrier film 7 in the embodiment of the present invention is rectangle, and its material is fiber, and its thickness is 0.06mm-
0.15mm。
Specifically, the negative plate 8 in the embodiment of the present invention is rectangle, and its material is lithium, and its thickness is 0.08mm-
0.15mm。
Specifically, the material of the currect collecting net 9 in the embodiment of the present invention is copper, material and the phase of positive cover 1 of the flow collection sheet 5
With and be welded on the inner side of positive cover 1, the rectangular battery core 3 is a slice, thin piece positive plate 11 close to the side of positive cover 1, institute
Flow collection sheet 5 is stated to contact with the cooperation of sub- positive plate 11.
Specifically, the strip battery in the embodiment of the present invention presses 2n+1: 2nSlice, thin piece positive plate 11 is positive with folding line 10
Folding covers currect collecting net 9, and the battery of lap carries out n forward folded to side as the sub- positive plate of monolithic using folding line 10
11 form the positive pole of battery and by non-overlapped part with the reverse folded negative pole for being formed battery of folding line 10.
On the other hand, the embodiment of the present invention additionally provides the preparation method of foregoing battery, and prepared by this method include：
In some or all of laying currect collecting net 9 of the reverse side of negative plate 8, by positive plate 6, barrier film 7 and the negative of currect collecting net 9 is laid with
Pole piece 8 folds composition rectangular battery core 3 after stacking composition strip battery successively, and rectangular battery core 3 is installed on into negative cover 2
Its side of positive plate 6 is set to be contacted with the positive cover 1 provided with flow collection sheet 5 and make its laying in the seal cavity formed with positive cover 1
The side for having the negative plate 8 of currect collecting net 9 contacts with negative cover 2, while filling electrolyte 4 in seal cavity.
Specifically, this method is prepared and included：
(1) positive plate 6 is prepared with wet method, and the folding line 10 of preset width is printed by positive plate 6 in relevant position on positive plate 6
Be divided into size it is identical and for square 2n+1+ 1 slice, thin piece positive plate 11；
(2) negative plate 8, barrier film 7 and the currect collecting net 9 matched with the length and width of positive plate 6 is prepared；
(3) in the reverse side 2 of positive plate 6nCurrect collecting net 9 is laid on+1 slice, thin piece positive plate 11；
(4) alignment of negative plate 8 that positive plate 6, barrier film 7 and reverse side are laid with to currect collecting net 9 stacks composition strip battery, institute
Barrier film 7 is stated to stretch out from strip battery surrounding；
(5) strip battery is pressed 2n+1: 2nSlice, thin piece positive plate 11 is covered currect collecting net 9 with the forward folded of folding line 10；
(6) battery of lap is subjected to n forward folded using folding line 10 and is formed electricity as the sub- positive plate 11 of monolithic to side
Chi Xin positive pole and by non-overlapped part with the reverse folded negative pole for being formed battery of folding line 10；
(7) barrier film 7 stretched out in the battery after the folding for obtaining step (6) is installed on negative cover 2 and positive cover 1 after trimming
The interior simultaneously filling electrolyte 4 of the seal cavity of composition；The side of battery after the folding be the sub- positive plate 11 of monolithic and with weldering
The positive cover 1 for being connected to flow collection sheet 5 contacts, and its opposite side is to be laid with the negative plate 8 of currect collecting net 9 and contacted with negative cover 2.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：The embodiments of the invention provide a kind of Gao Gong
Rate li-Mn button cell and preparation method thereof, by designing a kind of positive plate, negative plate and barrier film for being easy to fold, on the one hand allow
Battery can accommodate more active materials in existing volume, during assembling, folding positive pole, negative pole, barrier film is formed one
It is overall, then it is integrally formed with negative cover, finally injects electrolyte, cover positive cover, completes whole assembling process.On the other hand
Compared with traditional soft-package battery, the button cell mechanical strength that the technique is produced is higher, has a safety feature, design size is cleverer
It is living, can meet the needs of numerous clients；Compared with common button cell, positive pole, negative pole, barrier film produce new after folding
Ultra high power button cell not only improves the electrical property of battery, improves its power output, and its application is also opened up
Exhibition.
Brief description of the drawings
Fig. 1 is the structural representation of high-power lithium Mn button battery provided in an embodiment of the present invention；
Fig. 2 is the partial enlarged drawing of high-power lithium Mn button battery provided in an embodiment of the present invention；
Fig. 3 is the structural representation that rectangular battery core provided in an embodiment of the present invention combines with seal cavity；
Fig. 4 is the structural representation of positive plate provided in an embodiment of the present invention；
Fig. 5 is the structural representation that the rectangular battery core in embodiment 2 folds for the first time；
Fig. 6 is second of structural representation folded of rectangular battery core in embodiment 2；
Fig. 7 is the structural representation that the rectangular battery core third time in embodiment 2 folds；
Fig. 8 is the structural representation that the rectangular battery core in embodiment 3 folds for the first time；
Fig. 9 is second of structural representation folded of rectangular battery core in embodiment 3；
Figure 10 is the structural representation that the rectangular battery core third time in embodiment 3 folds；
Figure 11 is the structural representation of the 4th folding of rectangular battery core in embodiment 3；
Figure 12 is the pulsed discharge curve map of existing button cell；
Figure 13 is the pulsed discharge curve map of button cell provided in an embodiment of the present invention.
In figure：1 positive cover, 2 negative covers, 3 rectangular battery cores, 4 electrolyte, 5 flow collection sheets, 6 positive plates, 7 barrier films, 8 negative poles
Piece, 9 currect collecting nets, 10 folding lines, 11 sub- positive plates.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with accompanying drawing
It is described in detail on step ground.
Referring to Fig. 1-11, the embodiments of the invention provide a kind of high-power lithium Mn button battery, the battery includes positive cover
1st, negative cover 2 and positive plate 6 in the seal cavity formed between positive cover 1 and negative cover 2, barrier film 7, negative plate 8 with
Electrolyte 4 etc..Aforementioned structure and existing button cell are essentially identical, and difference is：Negative plate 8 in the present embodiment
Reverse side is some or all of to be laid with currect collecting net 9, preferably part, and the electric conductivity that currect collecting net 9 can not only improve negative plate 8 ensures
Reaction is carried out, and negative plate 8 can also be made to have pliability in order to fold.Wherein, positive plate 6, barrier film 7 and reverse side are laid with collection
The negative plate 8 of drift net 9 folds after stacking composition strip battery successively（It is required that phase-contact surface polarity is identical after folding every time,
The opposite polarity of both sides, each folded into registration make rectangular battery core 3 be cuboid structure after folding completely）Composition and annular seal space
The rectangular battery core 3 that body coordinates, barrier film 7 are located at the front of negative plate 8, positive plate 6, the length and width of barrier film 7 and negative plate 8
Cooperate.Rectangular battery core 3 is in seal cavity（Seal cavity is filled to greatest extent to increase active material）, it is leaned on
The side of nearly positive cover 1（Upper surface as shown in Figure 1, it is the positive pole of battery）For positive plate 6, its opposite side（As shown in Figure 1
Lower surface, be battery negative pole）To be laid with the negative plate 8 of currect collecting net 9, currect collecting net 9 contacts with negative cover 2.Positive plate 6
To be provided with folding line 10 at the manganese electrode of wet production and folding, the violent electrode of wet production coordinates currect collecting net to make it have pliability
It is easy to fold, folding line further makes positive plate 6 foldable（Barrier film 7, negative plate 8 and currect collecting net 9 are respectively provided with certain ductility then
Folding line need not be set）.The inner side of positive cover 1 is provided with the flow collection sheet 5 coordinated with the side of rectangular battery core 3 and is used to improve electric conductivity
Can, it is specifically the rectangular sheet coordinated with the side of the positive electrode of rectangular battery core 3.It is filled between rectangular battery core 3 and seal cavity
Electrolyte 4.
Wherein, referring to Fig. 1-3, the button cell in the embodiment of the present invention is circle, i.e., positive cover 1 and negative cover 2 with
Circle, its material can be SUS430.Rectangular battery core 3 is square（Certainly its rectangle that can also do not waited for length and width, accordingly
Background positive plate 11 is the rectangular sheet that length and width do not wait）And its four angles are acted against on the inwall of seal cavity or positioned at seal cavity
Inwall adjacent inboard with maximum fill seal cavity.
Specifically, referring to Fig. 4, the positive plate 6 in the embodiment of the present invention is rectangle, and its thinner thickness makes it easy to fold,
Its thickness is specially 0.20mm-0.40mm, its scheduled width（Determined according to folding times, folding direction etc.）Folding line 10
（Quantity is 2n）It is divided into 2n+1+ 1 square and the sub- positive plate 11 of size identical, every layer of rectangular battery core 3 are containing a slice, thin piece just
Pole piece 11, its length are slightly larger than 2nThe total length of+1 slice, thin piece positive plate 11.Wherein, n is the integer more than or equal to zero.
Further, the positive plate 6 in the embodiment of the present invention is original with manganese dioxide, graphite and ptfe emulsion etc.
Material, using ethanol as solvent（Make powder that there is certain viscosity）, obtained by roller roll forming, and by laser printer types
Folding line 10, length direction of the folding line 10 perpendicular to positive plate 6.
Specifically, the barrier film 7 in the embodiment of the present invention is rectangle, and its material is fiber, it is desirable to its have high mechanical strength,
The features such as absorbency is high low with resistivity.Require that its thinner thickness makes it easy to fold simultaneously, its thickness is specially 0.06mm-
0.15mm, its width are more than the width of positive plate 6, and its length is more than the length of positive plate 6, and barrier film 7 is made during folding to rectangle electricity
The surrounding of pond core 3, which is stretched out, prevents the short circuit of positive plate and negative plate, the barrier film 7 for stretching out battery is trimmed during assembling.
Specifically, the negative plate 8 in the embodiment of the present invention is rectangle, and its material is lithium, and its thinner thickness makes it easy to roll over
Folded, its thickness is specially 0.08mm-0.15mm, and its width is roughly equal to the width of positive plate 6, and its length is roughly equal to positive plate 6
Length.
Specifically, the material of the currect collecting net 9 in the embodiment of the present invention is copper or its alloy etc., and its thickness is very thin to make it just
In on the negative plate 8 that is laid in, its thickness is 0.01-0.04mm, and it is specifically as follows the structures such as mesh or grid, and its width omits
Less than the width of positive plate 6, its length is the length of 1/2-2/3 positive plates 6, and preferably its length is that can cover 2n+ 1 slice, thin piece positive pole
Piece 11.The material of flow collection sheet 5 is identical or approximate with positive cover 1 and welds (spot welding) on the inner side of positive cover 1, its thickness compared with
Thin, it is specially 0.1-0.2mm.Rectangular battery core 3 is a slice, thin piece positive plate 11 close to the side of positive cover 1, flow collection sheet 5 it is big
It is small specifically can be identical with sub- positive plate 11, coordinate flow collection sheet 5 and the slice, thin piece positive plate 11 and contact.
Specifically, the strip battery in the embodiment of the present invention presses 2n+1: 2nSlice, thin piece positive plate 11 is with corresponding folding line
10 is positive（On the contrary the present embodiment specifies the folding direction that covers currect collecting net 9 as forward direction, then be reverse folded）Once will it fold
Currect collecting net 9（Part）Covering, specifically covers 2nSlice, thin piece positive plate 11, there is a slice, thin piece positive plate 11 to cover；Lap（I.e.
The part of covering, specially 2nSlice, thin piece positive plate 11）Battery using corresponding folding line 10 carry out n forward folded to side as
The sub- positive plate 11 of monolithic forms the positive pole of battery（Contacted with the flow collection sheet 5 of positive cover 1）And by non-overlapped part（One slice, thin piece is just
Pole piece 11）With the reverse folded negative pole for being formed battery of corresponding folding line 10（Currect collecting net 9 and negative pole for negative plate 8 and thereon
Lid 2 contacts）.
A kind of high-power lithium Mn button battery is present embodiments provided, the battery passes through a kind of special " square and folding
Battery chip " replace existing " circular batteries core ", on the one hand the battery chip with certain length is repeatedly rolled over
It is folded, then reassemble, so that inside battery there can be the active material of abundance, so as to ensure that the capacity of battery.It is another
Aspect, the battery is compared with traditional soft-package battery, and the battery use temperature range is broad, high mechanical strength；With common button electricity
Pond is compared, and its continuous discharge electric current is substantially improved, and so as to improve the power output of battery, is greatly broadened it and is applied model
Enclose.
Embodiment 2
Embodiment 2 discloses a kind of button cell of CR3032 specifications, the composition such as table of its battery on the basis of embodiment 1
Shown in 1：
Table 1
Positive plate is made up of five slice, thin piece positive plates, and monolithic size is 18mm*18mm, the folding line between five be respectively 0.03mm,
0.09mm, 0.18mm and 0.03mm.For its folding process referring to Fig. 5-7, folding is forward folded upwards in figure, is folded down to be reverse
Fold, fold altogether three times, totally five layers, every layer of slice, thin piece positive plate.
Wherein, the size of the button cell in the present embodiment is identical with the CR3032 of routine size；Specifically, its external diameter
For 29.98mm, its thickness is 2.52mm.
The performance parameter of the button cell in the present embodiment is verified below
1st, output voltage contrast test：
Table 2
Table 2 is the existing button of the button cell that the present embodiment provides under the scene that 300 Ω, 150 Ω are loaded and formed objects
The voltage-contrast of battery, the CR3032 batteries that the present embodiment provides as can be seen from Table 2 have obvious advantage, and 150 Ω are born
Load voltage can also be stablized more preferable in more than 3.0V, power-performance.
2nd, the volume test of gradient constant-current discharge contrasts：
Quick constant current ladder discharging condition：I.e. at 20 ± 2 DEG C of temperature and relative humidity 35%-75%, constant current continuous discharge：Load
45mA continuous discharges, to 2.0V, rest 3h；22mA continuous discharges are loaded, to 2.0V, rest 3h；11mA continuous discharges are loaded, extremely
2.0V, rest 3h；5mA continuous discharges are loaded, to 2.0V, rest 3h；1mA continuous discharges are loaded, to 2.0V；Its result such as table 3
Shown in table 4：
Table 3
Table 4
It was found from table 3 and 4, existing battery easily polarization, can not put too many at all under 45mA and 22mA heavy-current discharge
Capacity, it is poor that power is reflected indirectly.And the CR3032 batteries that the present embodiment provides, under 45mA heavy-current discharge, battery
Capacity can also release the 50% of total capacity, power-performance is more preferable.From general power the present embodiment provide battery relative to
Existing battery is also improved.
3rd, maximum surge current test comparison：
Test condition：100mA, which puts 3s and stops 27s, is recycled to voltage 2.0V, and the result of existing CR3032 batteries is as shown in figure 12, this
The result for the CR3032 batteries that embodiment provides is as shown in figure 13.In figure, the curve on top represents voltage curve, the curve of bottom
Represent current curve.From the point of view of cycle-index, under 100mA pulses, the cycle-index for the CR3032 batteries that the present embodiment provides is bright
Aobvious to be higher than existing CR3032 batteries, its maximum surge current can reach 110mA, and the maximum surge current of existing battery
Only 25mA, absolutely prove that the power for the CR3032 batteries that the present embodiment provides is more preferable.
The present embodiment specifically provides manufacturing process and the performance test of the button cell of CR3032 specifications, from test result
As can be seen that the present embodiment provide button cell with higher and more stable output voltage, with bigger power output,
The advantages that longer service life and bigger pulse current.
Embodiment 3
Embodiment 3 discloses a kind of button cell of CR2450 specifications, the composition such as table of its battery on the basis of embodiment 1
Shown in 5：
Table 5
Positive plate is made up of nine slice, thin piece positive plates, and monolithic size is 14mm*14mm.Its folding process referring to Fig. 8-11, in figure to
Upper folding is forward folded, is folded down to be reverse folded, is folded 4 times, totally nine layers altogether；Battery form factor is：It is a diameter of
24.47-24.50mm, it is highly 5.0-5.2mm.
Embodiment 4
Embodiment 4 provides the preparation method of battery disclosed in embodiment 1-3, and referring to Fig. 1-11, prepared by this method include：
In some or all of laying currect collecting net 9 of the reverse side of negative plate 8（Preferably part）, by positive plate 6, barrier film 7 and reverse side
The negative plate 8 for being laid with currect collecting net 9 stacks folding composition rectangular battery core 3 after composition strip battery successively, and barrier film 7 stacks
In the front of negative plate 8, rectangular battery core 3, which is installed in the seal cavity that negative cover 2 forms with positive cover 1, makes its positive plate 6
Side（The positive pole of battery）One for being contacted with the positive cover 1 provided with flow collection sheet 5 and making that it is laid with the negative plate of currect collecting net 98
Side（The negative pole of battery）Contacted with negative cover 2（The side for being laid with currect collecting net 9 contacts with negative cover 2）, while in annular seal space
Internal filling electrolyte 4.
Specifically, this method is prepared and included：
(1) positive plate 6 is prepared with wet method, and the folding line 10 of preset width is printed in relevant position on positive plate 6（Quantity is
2n）By positive plate 6 be divided into size it is identical and for square 2n+1+ 1 slice, thin piece positive plate 11.Wherein, wet method and conventional dry method
Corresponding, wet method, for raw material, mainly makes work with manganese dioxide, graphite and ptfe emulsion of routine etc. in traditional positive pole
In terms of skill, alcohol is added, makes powder that there is certain viscosity, whole material can be integrally formed, and be easy to be molded, and this technique uses
Roller rolls out positive plate, and such positive plate could have pliability after screening, be easy to fold.This just allows " and powder granulation " link
" and powder rolling piece " is reformed into, so referred to as wet processing.
(2) negative plate 8, barrier film 7 and the currect collecting net 9 matched with the length and width of positive plate 6, negative plate 8, barrier film 7 are prepared
It is rectangle with currect collecting net 9, the length and width and positive plate 6 of negative plate 8 are of substantially equal, and the length-width ratio positive plate 6 of barrier film 7 is big, afflux
The length and width of net 9 are small compared with positive plate 6（Specific length is slightly larger than 2nThe overall length of+1 slice, thin piece positive plate 11）.
(3) in the reverse side of positive plate 6 continuous 2nCurrect collecting net 9 is laid on+1 slice, thin piece positive plate 11, opposite side preparation folds
By the most of covering of currect collecting net 9.
(4) negative plate 8 that positive plate 6, barrier film 7 and reverse side are laid with to currect collecting net 9 aligns and stacks composition strip successively
Battery, in order to ensure the insulation effect of barrier film 7, barrier film 7 stretches out from strip battery surrounding.
(5) strip battery is pressed 2n+1: 2nSlice, thin piece positive plate 11 is with the corresponding forward folded of folding line 10 by currect collecting net 9
Part covers, and exposes a piece of sub- positive plate 11 with currect collecting net 9.
(6) by lap（Capped 2nSlice, thin piece positive plate 11）Battery with corresponding folding line 10 carry out n times just
To side is folded to the positive pole of battery is formed for the sub- positive plate 11 of monolithic and by non-overlapped part（That exposes a piece of carries afflux
The sub- positive plate 11 of net 9）With the reverse folded negative pole for being formed battery of corresponding folding line 10, expose a piece of with currect collecting net 9
Sub- positive plate 11.
(7) barrier film 7 that is stretched out in the battery after the folding for obtaining step (6) be installed on after trimming negative cover 2 with just
The interior simultaneously filling electrolyte 4 of seal cavity that polar cap 1 is formed.The side of battery after folding（Positive pole）For the sub- positive plate 11 of monolithic
And the positive cover 1 with being welded with flow collection sheet 5 contacts, its opposite side（Negative pole）To be laid with the negative plate 8 of currect collecting net 9 and thereon
Currect collecting net 9 contacts with negative cover 2.
The preparation method of high-power lithium Mn button battery is present embodiments provided, this method combines button cell and Soft Roll
Battery, special preparation technology and processing are used by positive plate, and lay currect collecting net, while negative plate, barrier film etc. are carried out
Accommodation, using special folding mode make it is overlapping after battery be easy to fold, and relative to existing battery its
Performance is more excellent.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (10)
1. a kind of high-power lithium Mn button battery, including positive cover (1), negative cover (2) and located at positive cover (1) and negative cover
(2) positive plate (6), barrier film (7), negative plate (8) and electrolyte (4) in the seal cavity formed between；Characterized in that, institute
State negative plate (8) reverse side it is some or all of be laid with currect collecting net (9), the positive plate (6), barrier film (7) and reverse side are laid
The negative plate (8) for having currect collecting net (9) stacks the rectangle for forming that folding is formed and seal cavity coordinates after strip battery successively
Battery (3)；For the rectangular battery core (3) in seal cavity, it is positive plate (6) close to the side of positive cover (1), its
Opposite side is the negative plate (8) for being laid with currect collecting net (9)；The positive plate (6) is to be set at the manganese electrode of wet production and folding
There is folding line (10), the flow collection sheet (5) coordinated with rectangular battery core (3) side is provided with the inside of the positive cover (1).
2. high-power lithium Mn button battery according to claim 1, it is characterised in that the button cell is circular, institute
Rectangular battery core (3) is stated to act against on the inwall of seal cavity for square and its four angles or the inwall positioned at seal cavity
Adjacent inboard.
3. high-power lithium Mn button battery according to claim 2, it is characterised in that the positive plate (6) is rectangle, its
Thickness is 0.20mm-0.40mm, and the folding line (10) of its scheduled width is divided into 2n+1+ 1 square sub- positive plate (11).
4. high-power lithium Mn button battery according to claim 3, it is characterised in that the positive plate (6) is with titanium dioxide
Manganese, graphite and ptfe emulsion are raw material, using ethanol as solvent, are obtained by roller roll forming, and beaten by laser
Print machine printing folding line (10).
5. high-power lithium Mn button battery according to claim 1, it is characterised in that the barrier film (7) is rectangle, its material
Matter is fiber, and its thickness is 0.06mm-0.15mm.
6. high-power lithium Mn button battery according to claim 1, it is characterised in that the negative plate (8) is rectangle, its
Material is lithium, and its thickness is 0.08mm-0.15mm.
7. high-power lithium Mn button battery according to claim 3, it is characterised in that the material of the currect collecting net (9) is
Copper, the material of the flow collection sheet (5) is identical with positive cover (1) and is welded on the inner side of positive cover (1), the rectangular battery core
(3) it is a slice, thin piece positive plate (11) close to the side of positive cover (1), the flow collection sheet (5) coordinates with sub- positive plate (11) to be contacted.
8. high-power lithium Mn button battery according to claim 7, it is characterised in that the strip battery presses 2n+
1: 2nSlice, thin piece positive plate (11) is covered currect collecting net (9) with folding line (10) forward folded, and the battery of lap is with folding line
(10) n forward folded is carried out to side for the positive pole of the sub- positive plate of monolithic (11) composition battery and by non-overlapped part to roll over
The reverse folded negative pole for forming battery of trace (10).
9. the preparation method of the high-power lithium Mn button battery as described in claim any one of 1-8, it is characterised in that the side
Prepared by method include：
In some or all of laying currect collecting net (9) of the reverse side of negative plate (8), by positive plate (6), barrier film (7) and collection is laid with
The negative plate (8) of drift net (9) folds composition rectangular battery core (3) after stacking composition strip battery successively, by rectangular battery
Core (3), which is installed on, to be made its positive plate (6) side in the seal cavity that negative cover (2) is formed with positive cover (1) and is provided with flow collection sheet
(5) positive cover (1) contacts and it is laid with the side of the negative plate of currect collecting net (9) (8) and contacted with negative cover (2), simultaneously
Filling electrolyte (4) in seal cavity.
10. the preparation method of high-power lithium Mn button battery according to claim 9, it is characterised in that methods described system
It is standby to include：
(1) positive plate (6) is prepared with wet method, and folding line (10) general of preset width is printed in relevant position on positive plate (6)
Positive plate (6) be divided into size it is identical and for square 2n+1+ 1 slice, thin piece positive plate (11)；
(2) negative plate (8), barrier film (7) and the currect collecting net (9) matched with positive plate (6) length and width is prepared；
(3) in positive plate (6) reverse side 2nCurrect collecting net (9) is laid on+1 slice, thin piece positive plate (11)；
(4) negative plate (8) alignment that positive plate (6), barrier film (7) and reverse side are laid with to currect collecting net (9) stacks composition strip
Battery, the barrier film (7) are stretched out from strip battery surrounding；
(5) strip battery is pressed 2n+1: 2nSlice, thin piece positive plate (11) is covered currect collecting net (9) with folding line (10) forward folded
Lid；
(6) battery of lap is subjected to n forward folded to side as the sub- positive plate of monolithic (11) structure using folding line (10)
Into battery positive pole and by non-overlapped part with the reverse folded negative pole for being formed battery of folding line (10)；
(7) stretched out in the battery after the folding for obtaining step (6) barrier film (7) trimming after be installed on negative cover (2) with just
The interior simultaneously filling electrolyte (4) of seal cavity that polar cap (1) is formed；The side of battery after the folding is the sub- positive plate of monolithic
(11) and the positive cover (1) with being welded with flow collection sheet (5) contacts, its opposite side be laid with currect collecting net (9) negative plate (8) and
Contacted with negative cover (2).
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| CN201710825026.3A CN107508004B (en) | 2017-09-14 | 2017-09-14 | High-power lithium manganese button cell and preparation method thereof |
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|---|---|---|---|
| CN201710825026.3A CN107508004B (en) | 2017-09-14 | 2017-09-14 | High-power lithium manganese button cell and preparation method thereof |
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| CN107508004B CN107508004B (en) | 2024-01-16 |
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Cited By (1)
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| CN108461820A (en) * | 2018-02-08 | 2018-08-28 | 宜昌力佳科技有限公司 | A kind of high current li-Mn button cell and preparation method thereof |
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| CN107508004B (en) | 2024-01-16 |
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