CN101488585A - Power lithium cell electric core and manufacturing method thereof - Google Patents
Power lithium cell electric core and manufacturing method thereof Download PDFInfo
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- CN101488585A CN101488585A CNA2009100959455A CN200910095945A CN101488585A CN 101488585 A CN101488585 A CN 101488585A CN A2009100959455 A CNA2009100959455 A CN A2009100959455A CN 200910095945 A CN200910095945 A CN 200910095945A CN 101488585 A CN101488585 A CN 101488585A
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- 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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- 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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Abstract
The invention relates to a battery cell of a power lithium battery and a manufacturing method. The battery cell comprises a strip positive electrode slice, a strip negative electrode slice and a diaphragm arranged between the positive and negative electrode slices and is characterized in that one side of the positive and negative electrode slices is provided with a rectangular jugged uncoated jut, and the strip positive electrode slice, the diaphragm and the strip negative electrode slice are overlapped and twisted to lead the rectangular jugged uncoated jut at the upper part to be in alternate overlapped alignment arrangement. The overlapped rectangular jugged uncoated jut is welded with an electrode lug. The manufacturing method comprises respectively positioning a first rectangular jugged uncoated jut of the positive and negative electrode slices after coating active substance by a special winding mechanism and aligning the positive and negative electrode slices, manufacturing a bare battery core by winding, and manufacturing the bare battery core into the battery core. The lithium battery manufactured by the structure and the method can achieve the advantage of heavy current charging and discharging of an overlapped battery while having the advantage of simple process of a wound lithium battery, and overcomes the inherent defects of the two methods.
Description
Technical field
The present invention relates to a kind of lithium battery electric core and manufacture method thereof, refer in particular to a kind of structure of power lithium cell electric core and have the manufacture method that the rectangle profile of tooth does not have the lithium battery electric core that is coated with jut stepped construction electrode slice.
Background technology
Along with development of electronic technology, lithium battery is able to extensive use, and makes lithium battery to more high-energy, the development of bigger sense of current.Making the comparatively general method of lithium battery electric core now is to adopt takeup type and stacked dual mode.For traditional takeup type manufacture method, because the lug of positive, negative electrode plate is welded on an end of strip collector electrode slice, during battery charging and discharging only by single-ended connection collector, harmony to battery charging and discharging has certain influence, internal resistance is higher relatively, heavy-current discharge performance is relatively poor, has limited the application of lithium battery on electrokinetic cell of this structure; Secondly reel back battery need be on collector soldering polar ear, make its thickness increase the thickness (thickness of lug is generally about 0.1mm) of a lug approximately.
In order to overcome the undesirable feature of above-mentioned coiling type lithium battery when the big charging or discharging current, generally at present adopt stacked method to make power lithium battery.The manufacture method of stacked lithium battery is referring to Figure 10～shown in Figure 12, cut electrode film 53,54 one-tenth rectangles of negative electrode plate, electrode film 53, barrier film 55, negative electrode plate 54 be added in order the regulation the number of plies (by the design electric core specification, energy requirement, the lamination number of plies needs corresponding increasing under the macro-energy), be coated with welding electrode lug on the jut 52 and make lithium battery electric core 51 with the termination zone bundling shaping and in stacked nothing then.But owing to when nothing is coated with on the jut 52 soldering polar ear, very easily weld disconnected or rosin joint, make battery capacity not reach designing requirement, have a strong impact on the rate of finished products of lithium battery electric core; Especially therefore high in order to guarantee to cut precision to cutting the mould and die accuracy requirement, in battery charge and discharge process, pierce through barrier film otherwise burr can occur around the pole piece, cause short circuit, influence the safe in utilization of battery; In electrode slice blanking process, produce a part of leftover pieces in addition, cause the utilance of material that certain loss is arranged.
Summary of the invention
For overcoming the above-mentioned shortcoming of prior art, the invention provides a kind of power lithium cell electric core and manufacture method thereof, can realize the advantage that stacked battery discharges and recharges greatly, have the technological advantage of coiling type lithium battery again concurrently, overcome simultaneously above-mentioned two kinds of methods intrinsic shortcoming.
The present invention realizes that the technical scheme of above-mentioned purpose is: a kind of power lithium cell electric core, this electricity core comprises electrode film, negative electrode plate and the barrier film between positive, negative electrode plate, one side of described strip electrode film, negative electrode plate has the rectangle profile of tooth not have the jut of being coated with, and reels behind electrode film, barrier film, the negative electrode plate lamination and make the rectangle profile of tooth on its top not have the jut of being coated with to be and to replace stacked alignment and arrange.There is not welding electrode lug on the jut of being coated with in described stacked rectangle profile of tooth.The manufacturing step of described power lithium cell electric core is as follows:
1. the continuous coating of one side, another side intermittently are coated with negative electrode active material and form middle no coating blank space on negative pole winding shape collector; Two are coated with positive active material continuously on positive pole volume bar shaped collector; Bottom has or not the coating blank space in the described positive and negative electrode winding.
2. described positive and negative plate coating winding, and forms the rectangle profile of tooth on the no coating blank space top of electrode slice and does not have the jut of being coated with by cutting or laser technology forms strip electrode film, negative electrode plate by the lithium battery electric core designing requirement.
3. first rectangle profile of tooth of locating positive, negative electrode plate respectively by special-purpose winding mechanism does not have the jut of being coated with, place barrier film between the positive, negative electrode plate, make it be wound into naked electric core, and make described rectangle profile of tooth not have the jut of being coated with alignment and alternately laminated, there is not welding electrode lug on the jut of being coated with in its rectangle profile of tooth again.
4. with naked electric core with aluminium foil bag encapsulation or aluminum hull encapsulation or box hat encapsulation, inject electrolyte after the vacuumize, treat that electrolyte and positive, negative electrode plate and barrier film fully soak into after, change into, degasification the formation lithium battery electric core.
Compared with prior art, the invention has the advantages that: have a plurality of rectangle profiles of tooth on the wall scroll electrode slice and do not have the stacked and soldering polar ear of the jut of being coated with, improved the drawback of the inhomogeneous discharge of coiling battery and can avoid not having and be coated with the jut rosin joint or the paillon foil drawing crack (does not influence its result of use even disconnected one or several nothing is coated with jut yet, and the disconnected nothing of stacked lithium battery is coated with jut this plate electrode was lost efficacy), improved electric core make efficiency and finished product rate; Simultaneously also eliminate nickel or the influence of aluminium pole ears on cell thickness, improved volume of battery energy ratio.
Description of drawings
Fig. 1 is a power lithium cell electric core perspective view of the present invention.
Fig. 2 is a power lithium cell electric core sectional structure chart of the present invention.
Fig. 3 does not have the jut of being coated with negative electrode plate structural representation for the rectangle profile of tooth that the present invention makes.
Fig. 4 does not have the jut of being coated with electrode film structural representation for the rectangle profile of tooth that the present invention makes.
The negative plate coating winding front view that Fig. 5 makes for the present invention.
The negative plate coating winding vertical view that Fig. 6 makes for the present invention.
The positive plate coating winding front view that Fig. 7 makes for the present invention.
The positive plate coating winding vertical view that Fig. 8 makes for the present invention.
Fig. 9 is the comparison diagram of the lithium battery discharge characteristic curve of the stacked lithium battery of prior art, coiling type lithium battery and structure of the present invention.
Figure 10～Figure 12 is the structural representation of the stacked lithium battery electric core of prior art.(Figure 10 is that positive pole, Figure 12 are negative pole for volume core, Figure 11)
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, present embodiment is a kind of power lithium cell electric core 1, comprise electrode film 6, negative electrode plate 5 and the barrier film between positive, negative electrode plate 3, the one side that it is characterized in that described strip electrode film 6, negative electrode plate 5 has the rectangle profile of tooth not have the jut of being coated with 2, and the rectangle profile of tooth make its top of reeling behind strip electrode film 6, barrier film 3, strip negative electrode plate 5 laminations does not have the jut of being coated with 2 and is and replaces stacked alignment 21 and arrange.Simultaneously there is not welding electrode lug 4 on the jut of being coated with 2 in described rectangle profile of tooth.
There are not the jut of being coated with 2 stacked and welding electrode lugs 4 owing to have a plurality of rectangle profiles of tooth on the wall scroll electrode slice of the present invention, improve the drawback of the inhomogeneous discharge of coiling battery and can avoid nothing to be coated with jut rosin joint or paillon foil drawing crack, electric core make efficiency and finished product rate have been improved, eliminate the influence on cell thickness of nickel or aluminium pole ears, improved volume of battery energy ratio.
Fig. 5, Fig. 6, Fig. 7, Fig. 8 are positive and negative plate coating winding schematic diagrames, and formation Fig. 3, the rectangle profile of tooth that has shown in Figure 4 do not have electrode film 6, the negative electrode plate 5 that is coated with jut 2 after cutting.The manufacturing step of described power lithium cell electric core is as follows;
1. the continuous coating of one side, another side intermittently are coated with negative electrode active material 31 on negative pole winding shape collector 32, no coating blank space 35 in the middle of forming; Two are coated with positive active material 34 continuously on positive pole volume bar shaped collector 33, form positive and negative plate coating winding 37; Bottom has or not coating blank space 36 in the described positive and negative plate coating winding 37.
2. described positive and negative plate coating winding 37 is cut by laser by the designing requirement of power lithium battery electric core or traditional blanking process forms strip electrode film 6, negative electrode plate 5, and the rectangle profile of tooth on the electrode slice does not have the jut of being coated with 2.
3. first rectangle profile of tooth of locating positive, negative electrode plate respectively by special-purpose winding mechanism does not have the jut of being coated with 2, place barrier film 3 between the positive and negative electrode, make it be wound into naked electric core 1, and make described rectangle profile of tooth not have the jut of being coated with 2 alignment and alternately laminated 21, there is not welding electrode lug 4 on the jut of being coated with 2 in its rectangle profile of tooth again.Because a plurality of rectangle profiles of tooth do not have and are coated with the equidistant of jut 2 and the location by special-purpose winding mechanism and make it can form described rectangle profile of tooth when reeling not have and be coated with the spread geometry that jut 2 is alignment alternately laminated 21.
4. with naked electric core 1 usefulness aluminium foil bag encapsulation or aluminum hull encapsulation or box hat encapsulation, inject electrolyte after the vacuumize, treat that electrolyte and positive, negative electrode plate and barrier film fully soak into after, change into, degasification the formation power lithium cell electric core.
Present embodiment is that example specifies with the manufacture method of 55A5130 lithium battery electric core:
The manufacturing of positive plate coating winding: according to proportioning process preparation positive active material 34 slurries of routine, with coating machine the slurry for preparing is coated with according to the technology that 55A5130 designs, the thickness of collector positive plate aluminium foil is 12～30um, the single face THICKNESS CONTROL is at 70～250um, and two-sided THICKNESS CONTROL is at 100～400um.
The manufacturing of negative plate coating winding: according to proportioning process preparation negative electrode active material 31 slurries of routine, with coating machine the slurry for preparing is coated with according to the technology that 55A5130 designs, the thickness of collector negative plate Copper Foil is 8～20um, the single face THICKNESS CONTROL is at 70～150um, and two-sided THICKNESS CONTROL is at 100～300um.
Above-mentioned positive and negative plate coating winding 37 cut according to the desired size of model 55A5130 lithium battery and form strip and have rectangular teeth shape and do not have electrode film 6, the negative electrode plate 5 that is coated with jut 2.First rectangle profile of tooth of locating positive, negative electrode plate respectively by the winding mechanism of special use according to production engineering specifications does not have the jut of being coated with 2 then, and between positive, negative electrode plate, place barrier film 3 and reel and become a naked electric core 1 of lithium battery, the naked electric core 1 usefulness aluminium foil bag of lithium battery is encapsulated, inject electrolyte after the vacuumize, after treating that electrolyte and positive and negative electrode and barrier film fully soak into, change into, degasification, get final product power lithium cell electric core.
Fig. 9 is the comparison diagram of the lithium battery of structure of the present invention and the stacked lithium battery of prior art, coiling type lithium battery discharge characteristic curve, among the figure 91: the lithium battery discharge curve of prior art laminated structure; 92: the lithium battery discharge curve of structure of the present invention; 93: the lithium battery discharge curve of prior art takeup type structure.Figure 10～Figure 12 is the structural representation of the stacked lithium battery electric core of prior art, comprises that Figure 10 rolls up core, Figure 11 positive pole, Figure 12 negative pole.
From figure, relatively can find out that the current discharge characteristic of stacked lithium battery and structure lithium battery of the present invention is basic identical, and the current discharge characteristic of coiling type lithium battery is poorer than above-mentioned two kinds of lithium batteries.But in battery charge and discharge process, pierce through barrier film owing to can occur burr easily around the electrode slice of stacked lithium battery, cause short circuit and influence the safe in utilization of battery; Secondly produce a part of leftover pieces in electrode slice blanking process, cause the waste of valuable lithium resource, the manufacturing process of lamination is comparatively complicated in addition, and therefore the characteristic of lithium battery of the present invention and manufacturing process comprehensively are optimum.
Claims (3)
1, a kind of power lithium cell electric core, this electricity core comprises strip electrode film (6), negative electrode plate (5) and the barrier film between positive, negative electrode plate (3), the one side that it is characterized in that described strip electrode film (6), strip negative electrode plate (5) has the rectangle profile of tooth not have the jut of being coated with (2), reels behind electrode film (6), barrier film (3), negative electrode plate (5) lamination and make the rectangle profile of tooth on its top not have the jut of being coated with (2) to be and to replace stacked alignment (21) and arrange.
2, a kind of power lithium cell electric core according to claim 1 is characterized in that described stacked rectangle profile of tooth do not have the jut of being coated with (2) and go up welding electrode lug (4).
3, a kind of manufacture method of a kind of power lithium cell electric core as claimed in claim 1 is characterized in that the manufacturing step of described power lithium cell electric core is as follows;
1. negative pole winding shape collector (31) go up one side continuously coating, another side intermittently be coated with negative electrode active material (32) and in the middle of forming no coating stay white (35); Be coated with positive active material (34) continuously last two of anodal winding shape collector (33); The positive and negative plate coating winding (37) that forms is gone up bottom and is had or not coating blank space (36);
2. described positive and negative plate coating winding (3), and forms the rectangle profile of tooth on one side of the no coating blank space (36) of electrode slice and does not have the jut of being coated with (2) by cutting or laser technology forms strip electrode film (6), negative electrode plate (5) by the lithium battery electric core designing requirement;
3. first rectangle profile of tooth of locating positive, negative electrode plate respectively by special-purpose winding mechanism does not have the jut of being coated with (2), place barrier film (3) between the positive, negative electrode plate, make it be wound into naked electric core (1), and make described rectangle profile of tooth not have the jut of being coated with (2) alignment and alternately laminated (21), do not have the jut of being coated with (2) in its rectangle profile of tooth again and go up welding electrode lug (4);
4. with naked electric core (1) with aluminium foil bag encapsulation or aluminum hull encapsulation or box hat encapsulation, inject electrolyte after the vacuumize, treat that electrolyte and positive, negative electrode plate and barrier film fully soak into after, change into, degasification the formation lithium battery electric core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100959455A CN101488585A (en) | 2009-02-21 | 2009-02-21 | Power lithium cell electric core and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2009100959455A CN101488585A (en) | 2009-02-21 | 2009-02-21 | Power lithium cell electric core and manufacturing method thereof |
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| CN101488585A true CN101488585A (en) | 2009-07-22 |
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| CNA2009100959455A Pending CN101488585A (en) | 2009-02-21 | 2009-02-21 | Power lithium cell electric core and manufacturing method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101820080A (en) * | 2010-04-01 | 2010-09-01 | 雷天电池(无锡)有限公司 | Lithium battery core |
| CN102735023A (en) * | 2011-04-07 | 2012-10-17 | 东莞新能源科技有限公司 | Drying method of lithium-ion battery electric core |
| CN106486701A (en) * | 2015-08-27 | 2017-03-08 | 三星Sdi株式会社 | Electrode assemblie, its manufacture method and rechargeable battery |
| CN110061181A (en) * | 2019-04-22 | 2019-07-26 | 佛山市实达科技有限公司 | A kind of battery and its electrode film, core |
| CN110071252A (en) * | 2019-04-22 | 2019-07-30 | 佛山市实达科技有限公司 | A kind of battery and its negative electrode plate, core |
-
2009
- 2009-02-21 CN CNA2009100959455A patent/CN101488585A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101820080A (en) * | 2010-04-01 | 2010-09-01 | 雷天电池(无锡)有限公司 | Lithium battery core |
| CN102735023A (en) * | 2011-04-07 | 2012-10-17 | 东莞新能源科技有限公司 | Drying method of lithium-ion battery electric core |
| CN106486701A (en) * | 2015-08-27 | 2017-03-08 | 三星Sdi株式会社 | Electrode assemblie, its manufacture method and rechargeable battery |
| CN106486701B (en) * | 2015-08-27 | 2021-05-25 | 三星Sdi株式会社 | Electrode assembly, method of manufacturing the same, and rechargeable battery |
| CN110061181A (en) * | 2019-04-22 | 2019-07-26 | 佛山市实达科技有限公司 | A kind of battery and its electrode film, core |
| CN110071252A (en) * | 2019-04-22 | 2019-07-30 | 佛山市实达科技有限公司 | A kind of battery and its negative electrode plate, core |
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Open date: 20090722 |