CN203839470U - Arc-shaped lithium battery and winding cell thereof - Google Patents
Arc-shaped lithium battery and winding cell thereof Download PDFInfo
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- CN203839470U CN203839470U CN201420080876.7U CN201420080876U CN203839470U CN 203839470 U CN203839470 U CN 203839470U CN 201420080876 U CN201420080876 U CN 201420080876U CN 203839470 U CN203839470 U CN 203839470U
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- Prior art keywords
- arc
- volume core
- lithium battery
- lamination
- adhesive tape
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 71
- 238000004804 winding Methods 0.000 title claims abstract description 14
- 238000003475 lamination Methods 0.000 claims description 60
- 239000010410 layer Substances 0.000 claims description 34
- 239000002390 adhesive tape Substances 0.000 claims description 29
- 230000004888 barrier function Effects 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 17
- 238000004026 adhesive bonding Methods 0.000 claims description 4
- 239000011229 interlayer Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 abstract description 8
- 230000006378 damage Effects 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 20
- 229910052799 carbon Inorganic materials 0.000 description 11
- 238000005096 rolling process Methods 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
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- 238000005452 bending Methods 0.000 description 5
- 239000012528 membrane Substances 0.000 description 5
- 229920006280 packaging film Polymers 0.000 description 5
- 239000012785 packaging film Substances 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
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- 208000027418 Wounds and injury Diseases 0.000 description 3
- 239000005030 aluminium foil Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
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- 229910021389 graphene Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000006230 acetylene black Substances 0.000 description 2
- 239000007767 bonding agent Substances 0.000 description 2
- 239000002134 carbon nanofiber Substances 0.000 description 2
- 239000002041 carbon nanotube Substances 0.000 description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- FKRCODPIKNYEAC-UHFFFAOYSA-N ethyl propionate Chemical compound CCOC(=O)CC FKRCODPIKNYEAC-UHFFFAOYSA-N 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000003273 ketjen black Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- 229910052493 LiFePO4 Inorganic materials 0.000 description 1
- 229910001305 LiMPO4 Inorganic materials 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 description 1
- 229910018060 Ni-Co-Mn Inorganic materials 0.000 description 1
- 229910018209 Ni—Co—Mn Inorganic materials 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 description 1
- ZVKRVGZVXQYLPZ-UHFFFAOYSA-N [Li].[V].P(O)(O)(O)=O Chemical compound [Li].[V].P(O)(O)(O)=O ZVKRVGZVXQYLPZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- SIXOAUAWLZKQKX-UHFFFAOYSA-N carbonic acid;prop-1-ene Chemical compound CC=C.OC(O)=O SIXOAUAWLZKQKX-UHFFFAOYSA-N 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 1
- 239000013538 functional additive Substances 0.000 description 1
- 229910021385 hard carbon Inorganic materials 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000012939 laminating adhesive Substances 0.000 description 1
- OVAQODDUFGFVPR-UHFFFAOYSA-N lithium cobalt(2+) dioxido(dioxo)manganese Chemical compound [Li+].[Mn](=O)(=O)([O-])[O-].[Co+2] OVAQODDUFGFVPR-UHFFFAOYSA-N 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- ILXAVRFGLBYNEJ-UHFFFAOYSA-K lithium;manganese(2+);phosphate Chemical compound [Li+].[Mn+2].[O-]P([O-])([O-])=O ILXAVRFGLBYNEJ-UHFFFAOYSA-K 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- YKYONYBAUNKHLG-UHFFFAOYSA-N n-Propyl acetate Natural products CCCOC(C)=O YKYONYBAUNKHLG-UHFFFAOYSA-N 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920005644 polyethylene terephthalate glycol copolymer Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229940090181 propyl acetate Drugs 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
Classifications
-
- 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
Abstract
The utility model discloses an arc-shaped lithium battery and a winding cell thereof. The winding cell comprises a positive plate, a negative plate and a diaphragm, wherein the positive plate and the negative plate are arranged oppositely; the diaphragm is arranged between the positive plate and the negative plate; laminated layers of the positive plate, the negative plate and the diaphragm are wound to form the winding cell; all the laminated layers at two ends of the winding cell are of an arc-shaped structure; and positive tabs and negative tabs which are distributed at intervals are riveted at the tail ends of the laminated layers. All the laminated layers at the two ends of the winding cell are of the arc-shaped structure; when the arc-shaped lithium battery is prepared by arc-shaped molding, two adjacent laminated layers at the two ends of the winding cell are in circular arc contact with each other and are stressed uniformly, so that the laminated layers are not prone to damage due to non-uniform stress, and the problem of short-circuiting can be prevented; and moreover, relative sliding is facilitated between circular arcs, the arc-shaped molding is further facilitated, and the lithium battery with the arc-shaped structure is formed favorably.
Description
Technical field
The utility model relates to technical field of lithium batteries, more particularly, relates to a kind of arc lithium battery and volume core thereof.
Background technology
The execution mode that the application for stating in claims is intended in this part provides background or context.Description herein can comprise the concept that can probe into, but the concept of having expected or having probed into not necessarily.Therefore, unless at this, point out, the content of describing in this part is not prior art for the application's specification and claims, and not because be included in just admit it is prior art in this part.
Lithium battery, because it has the outstanding advantages such as operating voltage is high, specific energy is large, self discharge is little, is originally widely used in numerous areas, particularly in the electronic product such as mobile phone, computer and wrist-watch.Square coiling type lithium battery is a kind of common lithium battery, by negative plate, barrier film and the positive plate of rectangular strip, is stacked successively and the volume core forming of reeling is prepared from.
In order to be better applicable to consumer demand, be convenient to consumer's use, existing electronic product is designed to body mechanics's structure more, now needs the lithium battery to be designed to set the arcuate structure of radian.But the volume cored structure of existing lithium battery is unsuitable for bending and is shaped as arcuate structure.Therefore, design that a kind of to be convenient to crooked moulding lithium battery coiling core be problem demanding prompt solution of lithium battery preparation field.
Utility model content
For solving the problems of the technologies described above, the utility model provides a kind of arc lithium battery and volume core thereof.
For achieving the above object, the utility model provides following technical scheme:
A volume core for arc lithium battery, the volume core of this arc lithium battery comprises:
The positive plate being oppositely arranged and negative plate;
Be arranged on the barrier film between described positive plate and negative plate;
Wherein, the lamination of described positive plate, barrier film and negative plate is made volume core by winding method, and the lamination of each layer of described volume core two ends is arcuate structure; The tail end riveted joint of described lamination has anode ear spaced apart and negative electrode lug.
Preferably, in the volume core of above-mentioned arc lithium battery, the lamination of each layer of described volume core two ends is semicircular arc;
Or the lamination of described volume core two ends interlayer is semiellipse arc.
Preferably, in the volume core of above-mentioned arc lithium battery, described anode ear is riveted on the tail end of described positive plate, and described negative electrode lug is riveted on the tail end of described negative plate, and the bearing of trend of described anode ear and negative electrode lug is the bearing of trend of described positive plate and negative plate.
Preferably, in the volume core of above-mentioned arc lithium battery, also comprise:
Adhesive tape for fixing described lamination tail end.
Preferably, in the volume core of above-mentioned arc lithium battery, described adhesive tape is fixedly wrapped in one end of described volume core, and described lamination tail end is fixed by described adhesive tape.
Preferably, in the volume core of above-mentioned arc lithium battery, described adhesive tape gluing is on the volume core between described anode ear and negative electrode lug, and described lamination tail end is fixed by described adhesive tape.
Preferably, in the volume core of above-mentioned arc lithium battery, described adhesive tape gluing deviates from the volume core of described negative electrode lug one side and is fitted on the volume core that described negative electrode lug deviates from described anode ear one side at described anode ear, and described lamination tail end is fixed by described adhesive tape.
Preferably, in the volume core of above-mentioned arc lithium battery, also comprise:
Be fitted in the adhesive tape of described negative electrode lug and riveted joint place of described negative plate and be fitted in described anode ear and the adhesive tape of described positive plate riveted joint place.
The utility model also provides a kind of arc lithium battery, this arc lithium battery comprises the battery cell that the volume core described in above-mentioned any one execution mode is moulded through arc, the arc-shaped bend direction of described cell is perpendicular to the bearing of trend of described volume core, and perpendicular to the surface of the non-arc of each lamination.
From technique scheme, can find out, the volume core of arc lithium battery provided by the utility model, comprising: the positive plate being oppositely arranged and negative plate; Be arranged on the barrier film between described positive plate and negative plate; Wherein, the lamination of described positive plate, barrier film and negative plate is made volume core by winding method, and the lamination of each layer of described volume core two ends is arcuate structure; The tail end riveted joint of described lamination has anode ear spaced apart and negative electrode lug.The lamination of rolling up each layer of core two ends described in present techniques scheme is arcuate structure, is convenient to carry out arc and moulds, and is convenient to form the lithium battery of arcuate structure.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the volume core of a kind of common quadrate lithium battery in prior art;
The structural representation of the volume core of a kind of lithium battery that Fig. 2 provides for the utility model embodiment;
Fig. 3 rolls up the end view of core shown in Fig. 2;
The structural representation of a kind of volume core tail end fixed form that Fig. 4 provides for the utility model embodiment;
The structural representation of the another kind volume core tail end fixed form that Fig. 5 provides for the utility model embodiment;
The structural representation of another volume core tail end fixed form that Fig. 6 provides for the utility model embodiment;
The structural representation of a kind of arc lithium battery that Fig. 7 provides for the utility model embodiment.
Embodiment
As shown in Figure 1, the lamination a4 being laid successively by positive plate a1, barrier film a2 and negative plate a3 forms through reeling the structure of the volume core a of general square coiling type lithium battery, and has anode ear a4 and negative electrode lug a5 in the inner riveted joint of volume heart a.
If the volume core a of structure shown in employing Fig. 1 carries out arc, mould formation arc lithium battery, the interaction force of the volume adjacent two lamination corners of the heart is inhomogeneous, is not easy to carry out arc and moulds, and easily causes the generation of the problems such as internal short-circuit.
Inventor studies discovery, if the joint face of described volume core upper and lower surface (two surfaces of volume core area maximum) is all set to smooth arcuate structure, can, so that stressed even between adjacent two laminations in two ends, be convenient to arc and mould.
Based on above-mentioned research, the utility model provides a kind of volume core of arc lithium battery, and the volume core of this arc lithium battery comprises:
The positive plate being oppositely arranged and negative plate;
Be arranged on the barrier film between described positive plate and negative plate;
Wherein, the lamination of described positive plate, barrier film and negative plate is made volume core by winding method, the arcuate structure that the lamination of each layer of described volume core two ends is; The tail end riveted joint of described lamination has anode ear spaced apart and negative electrode lug.
The lamination of rolling up each layer of core two ends described in present techniques scheme is arcuate structure, mould while preparing arc lithium battery carrying out arc, due between the two adjacent layer laminate at volume core two ends for circular arc contacts, stressed even between the two, be difficult for causing lamination because unbalance stress damages, can prevent short circuit problem; And be convenient to relative sliding between circular arc and circular arc, and then be convenient to carry out arc and mould, be convenient to form the lithium battery of arcuate structure.
It is more than the application's core concept, below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
A lot of details have been set forth in the following description so that fully understand the utility model, but the utility model can also adopt other to be different from alternate manner described here and implement, those skilled in the art can do similar popularization without prejudice to the utility model intension in the situation that, so the utility model is not subject to the restriction of following public specific embodiment.
Secondly, the utility model is described in detail in conjunction with schematic diagram, when the utility model embodiment is described in detail in detail; for ease of explanation; the schematic diagram of indication device structure can be disobeyed general ratio and be done local amplification, and described schematic diagram is example, and it should not limit the scope of the utility model protection at this.The three-dimensional space that should comprise in addition, length, width and height in actual fabrication.
Embodiment mono-
The present embodiment provides a kind of volume core of arc lithium battery, and with reference to figure 2, the lamination B that the volume core A of the lithium battery of arc shown in Fig. 2 is formed by positive plate 3, barrier film 2 and negative plate 1 supports by winding method.Described positive plate 3 is oppositely arranged with negative plate 1, and described barrier film 2 is arranged between described positive plate 3 and described negative plate 1.
Tail end riveted joint at described lamination B has anode ear spaced apart 4 and negative electrode lug 5.Wherein, the top of described lamination B is to be wound on inner one end, and tail end is positioned at outside one end after reeling.
Described volume core is rectangle flake structure by positive plate 3, barrier film 2 and negative plate 1, in Fig. 1 illustrated embodiment, described negative plate 1 is arranged on to outermost layer, in other embodiments, also described positive plate 3 can be arranged on to outermost layer.
As shown in Figure 3, the lamination B of each layer of two ends, left and right of described volume core A is arcuate structure, mould while preparing arc lithium battery carrying out arc, due between the two adjacent layer laminate at volume core A two ends for circular arc contacts, stressed even between the two, be difficult for causing lamination because unbalance stress damages, can prevent short circuit problem; And the contact structures of circular arc and circular arc are convenient to relative sliding, and then are convenient to carry out arc and mould, be convenient to form the lithium battery of arcuate structure.
Before reeling, the bearing of trend of anode ear and negative electrode lug is the bearing of trend of described positive plate and negative plate.Described anode ear is riveted on one end of positive plate, negative electrode lug is riveted on one end of negative plate, positive/negative plate is oppositely arranged, barrier film is set between the two, form lamination, one end that lug is not set is relative, and the one end that is provided with lug is relative, the bearing of trend of lug is identical with the bearing of trend of corresponding pole piece, and the one end that is not provided with lug is wound onto inside after reeling.In the present embodiment, the set-up mode of two lugs is convenient to roll up core and at the vertical direction of plane shown in Fig. 2, is carried out bending and realize arc and mould.
It is the semicircular arc structure of 180 ° that the lamination B of each layer of two ends, described volume core A left and right is central angle, the side line of the upper and lower surface of each layer laminate is respectively the tangent line of corresponding described arcuate structure, and the upper surface of each layer laminate B is to be connected by semicircular arc with lower surface.The cambered surface contact of 180 °, carrying out arc while moulding, can be so that adjacent two layers lamination more easily slides, being convenient to arc moulds, and the side line that the upper and lower surface of each layer laminate is set is respectively the tangent line of corresponding described arcuate structure, make arc two ends cambered surface and be designated as smooth connection up and down, being conducive to be equally convenient to arc and moulding.The lamination of a circle of reeling in the volume core after reeling in the embodiment of the present application is a layer laminate.In other embodiments, the lamination of a two ends layer can also be semiellipse arcuate structure.
Moulding for the ease of arc, described anode ear 4 is riveted on the tail end of described positive plate 3, and described negative electrode lug 5 is riveted on the tail end of described negative plate 1, and the bearing of trend of described anode ear 4 and negative electrode lug 5 is identical with the bearing of trend of described volume core A.
Described volume core A also comprises: be fitted in described negative electrode lug 5 and the adhesive tape 6 of described negative plate 1 riveted joint place and the adhesive tape 7 that is fitted in described anode ear 4 and described positive plate 3 riveted joints place.Described adhesive tape 6 is for further fixedly negative electrode lug 5, described adhesive tape 7 is for further fixedly anode ear 54, prevent that anode ear 4 and negative electrode lug 5 from respect to volume core A integral body, minor shifts occurring, centre-to-centre spacing is bigger than normal, less than normal or eccentric, also can stop the injury to other positions of battery core of burr that riveted joint produces simultaneously.The center of curvature of the arc battery after described center fingering row arc is moulded.
Described lamination B forms after described volume core A, and in order to prevent from rolling up the loose of core A, described volume core also comprises the adhesive tape 8 for fixing described lamination tail end.
With reference to figure 4, described adhesive tape 8 can fixedly be wrapped in one end of described volume core A, the tail end of described lamination B is fixed, and then it is loose to prevent from rolling up core A.
With reference to figure 5, the volume core A that described adhesive tape 8 can also be fitted between described anode ear 5 and negative electrode lug 4 is upper, the tail end of described lamination B is fixed, and then it is loose to prevent from rolling up core A.
With reference to figure 6, described adhesive tape 8 can also be fitted in described anode ear 5, and to deviate from the volume core A of described negative electrode lug 4 one sides upper and be fitted in described negative electrode lug 4 to deviate from the volume core A of described anode ear 5 one sides upper, the tail end of described lamination B is fixed, and then it is loose to prevent from rolling up core A.
Described in employing Fig. 4-Fig. 6, three kinds of execution modes can effectively prevent from rolling up core A and free loose problem, guarantee product quality when carrying out subsequent technique prepares arc lithium battery.Fig. 4-Fig. 6 is only concrete three kinds of examples of the application's lamination tail end fixed form, in other embodiments, can also be any two kinds or simultaneously adopt this three kinds of execution modes in three kinds of execution modes too.
In the present embodiment; described adhesive tape can be by one deck polypropylene, PETG, polyamide or other polymerized organics matrixes; one side increases acrylic glue or other glue that plays bonding effect forms, and its effect is the problems such as short circuit that fixed structure, protection pole piece cause to stop burr incised wound.
Known by foregoing description, the lamination of rolling up each layer of core two ends described in the present embodiment is arcuate structure, mould while preparing arc lithium battery carrying out arc, due between the two adjacent layer laminate at volume core two ends for circular arc contacts, stressed even between the two, be difficult for causing lamination because unbalance stress damages, can prevent short circuit problem; And be convenient to relative sliding between circular arc and circular arc, and then be convenient to carry out arc and mould, be convenient to form the lithium battery of arcuate structure, can prepare central angle and be greater than 0 °, be less than or equal to the arc lithium battery of 360 ° of any radians.
Embodiment bis-
Based on above-described embodiment, the present embodiment provides a kind of arc lithium battery, with reference to figure 7, described arc lithium battery comprises: the battery cell E that the volume core described in employing above-described embodiment is moulded through arc, the arc-shaped bend direction of described cell E is perpendicular to the bearing of trend of described volume core, and perpendicular to the surface of the non-arc of each lamination.Bearing of trend when vertically finger arc-shaped bend direction is crooked perpendicular to volume core described in the present embodiment and the surface of the non-arc of each lamination.
Described volume core two ends are arcuate structure, and this two ends line direction is the bearing of trend of volume core.Therefore,, on plane graph shown in Fig. 3, described arc-shaped bend direction refers to the bearing of trend perpendicular to described volume core.
The lithium battery of arc shown in Fig. 7 is a kind of bend mode of rolling up the heart described in above-described embodiment, now, two lugs are positioned at the inner surface of the arcuate structure of the arc battery after bending, and the two ends of structure volume core are bent upwards the arcuate structure that can form the lithium battery of arc shown in Fig. 7 simultaneously described in Fig. 3.
In other embodiments, two lugs can also be positioned at the outer surface of the arcuate structure of the arc battery after bending, and the two ends of the volume core of structure shown in Fig. 3 are bent downwardly the outer surface that can make two lugs be positioned at the arcuate structure of the arc battery after bending simultaneously.
Described volume core is to roll up core described in above-described embodiment, comprises positive plate, negative plate and is arranged on the barrier film between described positive plate and negative plate.
Positive plate comprises anodal coating and plus plate current-collecting body, and described positive plate and anode ear form anode.Anodal coating is that positive active material, conductive carbon, bonding agent mix in certain proportion, can improve battery accumulate capacity, improves battery performance.Wherein, positive active material comprises the Ni-Co-Mn class element oxidate for lithium Li such as cobalt acid lithium, nickle cobalt lithium manganate, LiMn2O4
rni
xco
ymn
zo2 (wherein r, x, y, z can value 0-1.5), the phosphoric acid salt material LiMPO4 such as LiFePO4, phosphoric acid vanadium lithium, lithium manganese phosphate (one or more in the element such as M=Fe, V, Mn, Co).Conductive carbon comprises agraphitic carbon (as Super P, acetylene black, Ketjen black etc.), graphite-like carbon (as KS-6 etc.) and novel nano conductive carbon (as carbon nano-fiber, carbon nano-tube, Graphene etc.).Described plus plate current-collecting body is the aluminium foil of thickness between 8 μ m-50 μ m, comprises endpoint value.
Negative plate comprises negative pole coating and negative current collector, and described negative plate and negative electrode lug form electrode negative pole.Negative pole coating is that negative electrode active material, conductive carbon, dispersant and bonding agent mix in certain proportion, can improve battery accumulate capacity, improves battery performance.Wherein, negative electrode active material comprises oxide, silicon carbon material of native graphite, Delanium (graphene-containing), composite graphite, hard carbon, silicon, silicon etc.Conductive carbon comprises that conductive carbon comprises agraphitic carbon (as Super P, acetylene black, Ketjen black etc.), graphite-like carbon (as KS-6 etc.) and novel nano conductive carbon (as carbon nano-fiber, carbon nano-tube, Graphene etc.).Described negative current collector is that thickness is the aluminium foil between 8 μ m-50 μ m, comprises endpoint value; Or for thickness is the Copper Foil between 5 μ m-50 μ m, comprise endpoint value.
Barrier film individual layer or plural layers that to be polyolefin stretch and form through dry method or wet method, as monolayer polyethylene barrier film, single-layer polypropylene barrier film and the laminated diaphragm being composited by polyethylene layer and polypropylene layer, described laminated diaphragm can comprise layer 2-3 membrane structure.Described barrier film separates positive/negative plate in lithium battery, and has electronic isolation and ionic conductivity.
Arc lithium battery described in the present embodiment, comprises anodal coating and negative pole coating, has improved the activity of both positive and negative polarity, and then has improved the accumulate capacity of lithium battery and the performance of battery.Described in simultaneously described arc lithium battery employing embodiment, roll up core and mould and be prepared from by arc, be convenient to carry out arc and mould, be convenient to form the lithium battery of arcuate structure, can prepare central angle and be greater than 0 °, be less than or equal to the arc lithium battery of 360 ° of any radians.
Embodiment tri-
The present embodiment provides the manufacture method of arc lithium battery described in a kind of above-described embodiment, and the method comprises:
Step S11: the lamination of positive plate, barrier film and the negative plate laid is successively formed to volume core by winding method, and wherein, the lamination of each layer of described volume core two ends is arcuate structure, the tail end riveted joint of described lamination has anode ear spaced apart and negative electrode lug.
Form volume core by winding method before, unfinished make anode ear and negative electrode lug more stable, prevent that them from coming off, can be at described anode ear and described positive plate riveted joint place laminating adhesive tape, at described negative electrode lug and the described negative plate riveted joint place adhesive tape of fitting.
For the ease of follow-up arc, mould, as above-mentioned, it is the arcuate structure of 180 ° that the lamination of each layer of two ends, described volume core left and right is central angle, the side line of the upper and lower surface of each layer laminate is respectively the tangent line of corresponding described arcuate structure, and the upper surface of each layer laminate is to be connected by semicircular arc with lower surface.
Loose in order to prevent rolling up core, can also adopt adhesive tape to be fixed the end of described lamination, embodiment can, referring to embodiment, not repeat them here.
Step S12: described volume core is placed in the packaging film of setting, forms cell after perfusion electrolyte, sealing.
Described packaging film is to form composite membrane by three layers of one deck polypropylene film, one deck aluminium foil and one deck nylon membranes.Wherein, can replace described nylon membrane by high temperature membrane.
Electrolyte is with LiPF
6as lithium salts, one or more electrolyte that are solvent of take in ethylene carbonate, propene carbonate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, propyl acetate, ethyl propionate can also add various functional additives to increase battery performance in this electrolyte.In this step, need to carry out flanging to described packaging film, last stamp face or shallow hole face by side packaging film folding at packaging film.
Step S13: on the bearing of trend perpendicular to described volume core, described cell is carried out to arc and mould, form tool arc lithium battery, wherein, the arc-shaped bend direction of described cell is perpendicular to the bearing of trend of described volume core, and perpendicular to the surface of the non-arc of each lamination.
Carrying out arc while moulding, can first adopt the moulding mode of running roller, described cell is carried out to preliminary arc and mould, this shaping methods can be that a running roller is repeatedly moulded, and can be also that a plurality of running rollers in differential roller footpath are repeatedly moulded.Then, through setting the further arc of mould, mould, form the arc lithium battery of specific arcuate structure.The lamination of each layer of volume core two ends that described in the present embodiment prepared by manufacture method is arcuate structure, mould while preparing arc lithium battery carrying out arc, due between the two adjacent layer laminate at volume core two ends for circular arc contacts, stressed even between the two, be difficult for causing lamination because unbalance stress damages, can prevent short circuit problem; And be convenient to relative sliding between circular arc and circular arc, and and then be convenient to carry out arc and mould, be convenient to form the lithium battery of the arcuate structure of various radians.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the utility model.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (9)
1. a volume core for arc lithium battery, is characterized in that, comprising:
The positive plate being oppositely arranged and negative plate;
Be arranged on the barrier film between described positive plate and negative plate;
Wherein, the lamination of described positive plate, barrier film and negative plate is made volume core by winding method, and the lamination of each layer of described volume core two ends is arcuate structure; The tail end riveted joint of described lamination has anode ear spaced apart and negative electrode lug.
2. the volume core of arc lithium battery according to claim 1, is characterized in that, the lamination of each layer of described volume core two ends is semicircular arc;
Or the lamination of described volume core two ends interlayer is semiellipse arc.
3. the volume core of arc lithium battery according to claim 1, it is characterized in that, described anode ear is riveted on the tail end of described positive plate, described negative electrode lug is riveted on the tail end of described negative plate, and the bearing of trend of described anode ear and negative electrode lug is the bearing of trend of described positive plate and negative plate.
4. the volume core of arc lithium battery according to claim 1, is characterized in that, also comprises:
Adhesive tape for fixing described lamination tail end.
5. the volume core of arc lithium battery according to claim 4, is characterized in that, described adhesive tape is fixedly wrapped in one end of described volume core, and described lamination tail end is fixed by described adhesive tape.
6. the volume core of arc lithium battery according to claim 4, is characterized in that, described adhesive tape gluing is on the volume core between described anode ear and negative electrode lug, and described lamination tail end is fixed by described adhesive tape.
7. the volume core of arc lithium battery according to claim 4, it is characterized in that, described adhesive tape gluing deviates from the volume core of described negative electrode lug one side and is fitted on the volume core that described negative electrode lug deviates from described anode ear one side at described anode ear, described lamination tail end is fixed by described adhesive tape.
8. the volume core of arc lithium battery according to claim 1, is characterized in that, also comprises:
Be fitted in the adhesive tape of described negative electrode lug and riveted joint place of described negative plate and be fitted in described anode ear and the adhesive tape of described positive plate riveted joint place.
9. an arc lithium battery, it is characterized in that, comprise the battery cell that volume core as described in claim 1-8 any one is moulded through arc, the arc-shaped bend direction of described cell is perpendicular to the bearing of trend of described volume core, and perpendicular to the surface of the non-arc of each lamination.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420080876.7U CN203839470U (en) | 2014-02-25 | 2014-02-25 | Arc-shaped lithium battery and winding cell thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420080876.7U CN203839470U (en) | 2014-02-25 | 2014-02-25 | Arc-shaped lithium battery and winding cell thereof |
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| CN203839470U true CN203839470U (en) | 2014-09-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103779614A (en) * | 2014-02-25 | 2014-05-07 | 杭州金色能源科技有限公司 | Arc lithium battery as well as manufacturing method and wound core of arc lithium battery |
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2014
- 2014-02-25 CN CN201420080876.7U patent/CN203839470U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103779614A (en) * | 2014-02-25 | 2014-05-07 | 杭州金色能源科技有限公司 | Arc lithium battery as well as manufacturing method and wound core of arc lithium battery |
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