CN102024993A - Zinc battery with longitudinal folding partition - Google Patents
Zinc battery with longitudinal folding partition Download PDFInfo
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- CN102024993A CN102024993A CN2010105399255A CN201010539925A CN102024993A CN 102024993 A CN102024993 A CN 102024993A CN 2010105399255 A CN2010105399255 A CN 2010105399255A CN 201010539925 A CN201010539925 A CN 201010539925A CN 102024993 A CN102024993 A CN 102024993A
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- dividing plate
- zinc
- negative pole
- longitudinal folding
- battery
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a rechargeable zinc battery with a longitudinal folding partition, which comprises a zinc cathode, an anode, an electrolyte and a partition. The partition at least comprises two core absorption layers, the middle part is a microporous core absorption layer, and the partition can be longitudinally folded to cover the long edge of the zinc cathode. A manufacturing method of the rechargeable zinc battery with the longitudinal folding partition comprises the following steps of: keeping the zinc cathode to be in contact with at least one core absorption layer, longitudinally folding the long edge of the partition around the zinc cathode, placing the anode on the partition and rolling the zinc cathode, the anode and the partition into a jelly roll structure.
Description
Technical field
The present invention relates to a kind of battery, particularly with the zinc battery of longitudinal folding dividing plate.
Background technology
The short emerging market of having given birth to battery and/or energy technology of the oil price of the increasing of environmental legislation, surging and the surge of electronic installation.Known at present technique field battery to provide energy to circuit, and comprise four basic modules: negative pole, positive pole, electrolyte and dividing plate.Negative pole provides electronics (anode reaction) for external circuit in discharge process.Positive pole receives electronics (cathode reaction) from external circuit in discharge process.Dividing plate makes negative pole and the anodal electric insulation that keeps, and the electrolyte that is arranged in the dividing plate then provides ionic conductance.
At present, exist a large amount of battery technologies, one of them is exactly a nickel-cadmium cell.Nickel-cadmium cell comprises the nickel cadmium cathode of mainly being made up of nickel hydroxide anodal and that mainly be made up of cadmium metal.In discharge process, the hydroxyl ion in the electrolyte (OH-sup) combines with cadmium metal (Cd), forms Cd (OH)
2, discharge electronics to external circuit by negative pole (positive pole, interdischarge interval).In discharge process, negative or positive electrode receives electronics from external circuit equally, thereby charged hydroxy nickel oxide (NiOOH) is converted into nickel hydroxide (Ni (OH)
2).Nickel-cadmium cell has several big advantages.Comprising the operation lifetime, long shelf life and the high temperature that prolong and the use under the cryogenic conditions.Yet nickel-cadmium cell also has weak point.Such as, nickel-cadmium cell does not catch up with the market performance requirement that improves day by day, and not environmental protection.Therefore, need a kind of advantage that not only has nickel-cadmium cell, and eco-friendly battery.
Another battery technology is a nickel zinc technology, and it has the potentiality that satisfy various application demands.Nickel-zinc cell has superior chemical property, and this point has gained public acceptance and sufficient documentary evidence is arranged for a long time.Such as, to compare with nickel-cadmium cell or cadmium hydrogen battery, nickel-zinc cell has higher open circuit voltage (promptly 1.7 volts are compared 1.4 volts), and high energy density might be provided.
The existing advantage of nickel-zinc cell also has shortcoming.Such as, the zinc dendrite growth is the FAQs of nickel-zinc cell, and is again the root that charging cell lost efficacy.Dendritic growth is a kind of phenomenon that occurs during battery charge, active material, i.e. zinc hydroxide Zn (OH)
2Whereby from state of oxidation reduction and be deposited on the base material as metallic zinc (Zn) (electrode that is promptly charging).Depend on charge condition, metal can precipitate with the form of dendrite, and might penetrate dividing plate, causes battery short circuit by electric bridge is provided between both positive and negative polarity.Therefore, exist demand to the zinc battery that has overcome dendritic growth.
In addition, zinc electrode subjects to deformation or densification, and wherein, more active material is deposited on the center of electrode usually by circulation, causes a convex shape (the zinc deposition of increase being arranged once in a while although once notice the corner of zinc electrode) substantially.This has caused the current density requirement different to the electrode zones of different, has reduced the utilization ratio of active material.
People have made multiple trial, reduce the dendritic growth in the nickel-zinc cell.Such as, people such as Adler (U.S. Patent number 5,453,336 and 5,302,475) advocate and use alkalinous metal base fluoride salt and carbonate, to reduce the deformation of zinc electrode in discharge process.People such as Spaziante (U.S. Patent number 4,181,777) have disclosed a kind of additive such as polysaccharide or D-sorbite, prevent the dendritic growth in the battery charging process.People such as Berchielli (U.S. Patent number 4,041,221) disclose the additive of inorganic titanate as positive pole.Rampel (U.S. Patent number 3,954,501) has disclosed the cellulosic mutual connection network that adds unsintered, not coalescent, hydrophobic linear fluorocarbon polymer, strengthens the gas fill again in the formula electrolysis tank method of chemical combination, capacity and cycle life again.The disclosed a kind of zinc positive pole of people such as Collien (U.S. Patent number 6,087,030) comprises the metallic compound of intensified response speed, for example indium, gallium, germanium, tin, and moisture potassium hydroxide.A kind of alkaline zinc cell that people such as Larsen (U.S. Patent number 4,857,424) disclose comprises the inhibition zinc corrosion of some and the silication of hydrogen, organic wetting agent of film forming.Charkey (U.S. Patent number 4,022,953) has disclosed the zinc electrode structure that comprises cadmium, is converted into the cadmium compound of dispersed metal cadmium in the Zinc material such as cadmium metal or with electrochemical means, and cadmium metal has certain particle and surface area.People such as Charkey (U.S. Patent number 5,863,676) have disclosed the application of zincic acid calcium component in zinc electrode.Charkey (U.S. Patent number 5,556,720) has disclosed barium hydroxide (Ba (OH)
2) or strontium hydroxide (Sr (OH)
2) application of material and conductive matrices, conductive matrices comprises to compare with zinc and has electropositive metal oxide, for example lead oxide (PbO), bismuth oxide (Bi
2O
3), cadmium oxide (CdO), gallium oxide (Ga
2O
3) or thallium oxide (Tl
2O
3).Charkey (U.S. Patent number 4,415,636) has disclosed the cadmium particle that is scattered in the anodal Zinc material.Charkey (U.S. Patent number 4,332,871) has disclosed the zinc electrode that wherein is distributed with cement additire.People such as Schrenk (U.S. Patent number 4,791,036) have disclosed the application of the anode collector that silicon bronze alloy makes, the venting when minimizing overcharge.At last, people such as Gibbard (U.S. Patent number 4,552,821) have disclosed in the form of a roll a kind of so that bear pressure, sealing, fill the formula nickel-zinc cell again.
With reference to the above,, there is not a kind of reference to include the anodic process of the nickel-zinc cell band packing of jellyroll structure although there are several diverse ways to prevent the dendritic growth of nickel-zinc cell.Generally speaking, in the battery manufacture process, cylindrical battery particularly, it is inevitable dripping some active materials from negative electrode or anode or both.When the active material of drippage touches battery, (or touch anode at any cathode material, or under the situation of any anode material contact negative electrode) will be short-circuited and discharge gas.Therefore, battery can become utterly useless or dangerous more (if because heating appears in short circuit or battery because the interior superpressure of battery loses physical integrity).In addition, dividing plate does not cover around electrode usually, just is placed between positive pole and the negative pole, and electrode wherein can touch battery can.
In charging process, the exposed part of anode has bigger tendency to generate zinc dendrite, and promptly dendrite generates around the open type anode, and touches adjacent negative electrode easily, even touches battery can.If positive pole also contacts with battery can, will be short-circuited.Therefore, need a kind of effective ways that prevent anode exposed parts dendritic growth.
Obviously, need battery that very high electric energy density is provided, and prevent the growth and/or the deformation of zinc dendrite, meanwhile keep the ability and the environmental-protecting performance of high-energy-density.
Summary of the invention
Technical problem solved by the invention is to provide a kind of simply constructed zinc battery with longitudinal folding dividing plate.
The technical solution that realizes the object of the invention is: a kind of charging cell again with longitudinal folding dividing plate, described charging cell again comprises: zinc negative pole, positive pole, electrolyte, be arranged on the dividing plate between the electrode, wherein said diaphragm rings is longitudinal folding around one side of zinc negative pole.
In a preferred embodiment, preferred embodiment provides a kind of longitudinal folding dividing plate of being with, and comprises the charging cell again of zinc negative pole, positive pole, electrolyte and dividing plate.Dividing plate wherein is longitudinal folding, the long limit of covering dividing plate below the zinc negative pole.Zinc negative pole, positive pole, electrolyte and dividing plate are wound into the jelly web-like and are contained in positive terminal and link to each other with positive pole, in negative terminal and the battery can that negative pole links to each other.
According to its main aspect, generally, preferred embodiment is to comprise zinc negative pole, positive pole, electrolyte and be arranged on dividing plate between the electrode, fills the formula zinc battery again with longitudinal folding dividing plate.Wherein, dividing plate is longitudinal folding along one side of zinc negative pole.Electrolyte comprises the potassium hydroxide (KOH) that is about 0.1%-55%, and concentration is about the lithium hydroxide (LiOH) of 0.1%-30%, Kacet, CsCO
3, indium sulfate (In
2(SO
4)), sulfurous acid indium (In
2(8O
3)) and be about the potassium stannate (K of 150ppm
2SnO
3).Perhaps, electrolyte comprises potassium hydroxide (KOH), about 15% CsAcet and the indium sulfate (In of 150ppm of about 0.1%-55%
2(SO
4)) or sulfurous acid indium (In
2(SO
3)).
Dividing plate comprises at least two wicking layers, and intermediate arrangement has porous layer or dendrite to stop separator.The wicking layer comprises polypropylene non-woven fabric material or nylon nonwoven fabrics.Dividing plate is along the long edge contraction of zinc negative pole.Like this, the zinc negative pole is just covered by dividing plate fully, makes the both sides of zinc negative pole contact with a wicking layer of dividing plate at least.Positive pole is arranged on the top of dividing plate, and contacts with a wicking layer.Zinc negative pole, positive pole, electrolyte and dividing plate are wound on together, form the jelly shape, just the part that covered by dividing plate of electrode lower long edges is in the bottom of jellyroll.Jellyroll comprises that one keeps the positive terminal of the negative terminal of electrical communication and and positive limit maintenance electrical communication with the zinc negative pole.Jellyroll is contained in the battery can, and the sheath of battery can is by a sealing ring and battery can insulation.Negative terminal and sheath keep electrical communication, and positive terminal and battery can keep electrical communication.Dividing plate makes zinc negative pole and tank body insulate along the long edge contraction of zinc negative pole.
In addition, preferred embodiment is the method for a kind of production with the charging cell again of longitudinal folding dividing plate.This method may further comprise the steps: obtain zinc negative pole, positive pole, electrolyte and the dividing plate of two wicking layers is arranged, porous layer or other dendrite trapping layer are set between the wicking layer.A wicking layer of zinc negative pole and dividing plate keeps in touch, and makes the bottom of zinc negative pole be covered fully by dividing plate.Positive pole is placed on dividing plate/negative pole group.Then negative pole, positive pole and dividing plate are wound into the jellyroll structure.The jellyroll structure comprises that one keeps the positive terminal of the negative terminal of electrical communication and and positive limit maintenance electrical communication with the zinc negative pole.At last the jellyroll structure is placed in the shell that comprises tank body, sealing and sheath.In addition, preferred embodiment is a kind of charging cell again that comprises more Kacet.
More particularly, prior art is advocated the layout that generally comprises rectangle zinc negative pole and dividing plate.The zinc negative pole comprises first end, second end, first edge, second edge, front, the back side and electrode slice.Dividing plate is generally rectangle, comprises the first half, the latter half, first edge, second edge, fold line, first terminal and second end.In addition, dividing plate comprises a wicking layer.The zinc negative pole is arranged on the bottom of dividing plate, and wherein second end of zinc negative pole is pressed close to second end of dividing plate.Prior art embodiment advocates the fold line accordion partition along first end, presses close to second end of dividing plate after folding, so that dividing plate is extended to outside the size of zinc negative pole, and makes electrode slice stretch out dividing plate.
Should be noted that in existing technical configuration first edge and second edge of zinc negative pole open wide,, do not seal first and second edges of zinc negative pole because the first half of dividing plate and the latter half only hide so that contact with the outside.Therefore, first and second edges of zinc negative pole may move to outside first and second edges of dividing plate, thus with electrode roll around and when putting into battery and external container come in contact.In addition, the discrete material of zinc negative pole may be moved to outside first and second edges of dividing plate, and provides electrical communication between zinc negative pole and any packing container.
It will be understood to one skilled in the art that, the zinc negative pole can be thus in the technology known method make.Such as, the powder mixture of desired material and adhesive can be pressed into suitable collector, only are in the purpose of demonstration, for example the copper screen grid.Prior art has utilized calcium hydroxide as the other part of negative pole mixture.Yet preferred embodiment need not to comprise calcium hydroxide, does not have the zinc negative pole of calcium hydroxide more to be favored.In addition, it will be understood to one skilled in the art that the various sheathing materials of preparation zinc negative pole are known by people, wherein representationally be, used adhesive material is inert material in battery context, and the quantity that is comprised is enough to mixture is maintained together.
Preferred embodiment is a kind of layout that comprises zinc negative pole and dividing plate.The zinc negative pole comprises first end, second end, first edge, second edge, front, the back side and electrode slice.Dividing plate comprises two wicking layers, and wicking layer intermediate arrangement has porous layer or dendrite trapping layer.Dividing plate also comprises a longitudinal folding line, first edge, second edge, first end, second end, front and back.Longitudinal folding line almost parallel, and be arranged between first edge and second edge of dividing plate.The zinc negative pole is arranged on the front between longitudinal folding line and dividing plate second edge.First edge of zinc negative pole is configured to roughly the longitudinal folding line parallel with dividing plate.Dividing plate longitudinally fold line is folding, makes first edge of dividing plate press close to second edge of dividing plate.Therefore, in the front and back of zinc negative pole and the wicking layer keeps in touch.Correspondingly, first end that exceeds negative pole of dividing plate, second end, first edge, second edge, the electrode slice of zinc negative pole exceed first edge and second edge of dividing plate.
Should be noted that opposite with prior art embodiment discussed above, first edge that preferred embodiment causes the zinc negative pole fully by diaphragm rings around.Like this, just can not reeled with dividing plate and be placed under the situation in the battery and be contacted with container in first edge at electrode.In addition, any material that comes off from first edge will be retained in the longitudinal folding line, and can not provide electrical communication between zinc negative pole and any packing container.
Used separator material should comprise and has film very thin relatively, pore structure of uniform size, to help the infiltration of wicking and electrolyte, reduces or eliminates the dendrite infiltration simultaneously.Used material should have enough elasticity and intensity, expands to tolerate any deformation and/or electrode.In a preferred embodiment, adopt a kind of laminated film, comprised two wicking layers on porous layer both sides.As the example that has no the purpose of limiting, porous layer can comprise commercially availabie CELGARD polypropylene film, and the wicking layer can comprise nylon nonwoven fabrics or polypropylene material.
Preferred embodiment comprises at least the separator film that the non-woven fabrics base material by two kinds of polymer impregnated one-tenth constitutes in addition, and wherein these two kinds of polymer form the matrixing network that runs through mutually.Only for exemplary purpose, polymer comprises as polyvinyl alcohol of first kind of polymer (PVA) or fluoro polyvinyl alcohol, and as water-soluble, the film forming polymer that KOH is insoluble of second kind of polymer.Wherein, only for exemplary purpose, second kind of polymer comprises hydrosulphate, phosphate and the cation salt thereof of polymerization.In addition, the embodiment of Ti Daiing can comprise the nano particle that can not be dissolved in potassium hydroxide.
As the example that has no the purpose of limiting, adopt to comprise potassium hydroxide (KOH) or be approximately 1% lithium hydroxide, 5% potassium acetate (KAcet), about 5% cesium carbonate (CsCO by weight by the heavy 10%-30% of being approximately
3), the about potassium stannate (K of 150ppm
2SnO
3) and greatly about 150-200ppm indium sulfate (In
2(SO
4)
3) potassium hydroxide aqueous solution be gratifying.The saturated electrolyte of original adoption zinc oxide (ZnO) suppresses zinc oxide, and to decompose to electrolyte from electrode be desirable.Know as the sealed cell technology, used electrolyte content should be subjected to the capacity restriction, so that provide effective oxygen recombination to react at the zinc electrode place.In a preferred embodiment, before the sealed cell, can add essential electrolyte in the open spaces at jellyroll cell device core position.
Positive pole comprises first end, second end, first edge, base, front, the back side and electrode slice.The anodal setting structurally, this structure comprise that dividing plate is around the folding layout of zinc negative pole.The first anodal edge roughly with longitudinal folding line parallel.Anodal paster stretches out the longitudinal folding line of dividing plate.The position of paster makes the paster of anodal paster and zinc negative pole be in the opposite side of structure near longitudinal folding line.The anodal back side and the wicking layer of dividing plate keep in touch, and make structure be rolled into jellyroll, and the anodal back side is contacted with the wicking layer of positive pole, and almost the front of whole positive pole all contacts with the wicking layer of positive pole.Will be appreciated that preferred embodiment comprises zinc negative pole and the positive pole that keeps in touch with the wicking layer, the wicking layer plays the effect in extending battery life cycle, particularly under 2C or higher discharge rate.
Negative pole, dividing plate and positive pole twist in and form a jellyroll together, and jellyroll is placed oneself in the midst of in the shell, thereby constitute battery.Jellyroll comprises zinc negative pole, positive pole, dividing plate, top and bottom.The top comprises the paster of zinc negative pole, and the bottom comprises anodal paster.Bottom longitudinally fold line forms, and dividing plate comprises wicking layer and porous layer.Shell comprises battery can, sealing and sheath.Sheath comprises negative terminal, and tank body comprises positive terminal.The bottom of jellyroll is configured to the bottom of tank body, makes anodal paster (only for exemplary purpose) for example be connected with positive terminal by welding.Equally, the top of jellyroll is configured to sheath, and paster is only for exemplary purpose) for example link to each other with sheath by welding, form a negative terminal.It will be understood to one skilled in the art that preferred embodiment comprises the negative terminal that is set to shell, to prevent zinc negative pole and housing contacts.It will also be appreciated that in affiliated field the battery of preferred embodiment can adopt prismatic or cylinder design according to specific application.Equally, the capacity of battery can change in the very wide limit of scope, the regulation that size requires according to application-specific.As an example, the capacity that matches of cylindrical sub-C battery is 1.5 amperes/hour.
In addition, preferred embodiment gives the cycle life that battery prolongs.According to the description of this paper, discharge capacity of the cell of the present invention exceeds 100 circulations or more than the nickel-zinc cell of routine substantially.
At last, the paster of zinc negative pole links to each other with sheath, to reduce the electrical communication of metallic surface zone and zinc negative pole, generates thereby reduce the hydrogen that is not easy to recombinate in battery.If produced hydrogen, and do not have the space of reorganization, the pressure in the battery will rise, and may cause baleful consequences.Correspondingly, in a preferred embodiment, zinc negative pole and sheath keep electrical communication, and anodal and tank body maintenance electrical communication.The oxygen that positive pole produces when charging latter stage and overcharge is easy and zinc negative pole chemical combination under optimal conditions, thereby reduce to come from the superpressure trend of oxygen.
The present invention compared with prior art, its remarkable advantage: the ability that effectively prevents dendritic growth.Another characteristics of preferred embodiment are that it possesses the ability that improves electric property and life cycle.Another characteristics of preferred embodiment and advantage are its simple structures, save the ability of producing.Another characteristics of preferred embodiment and advantage are its operational capacities under high levels of current.Another characteristics of preferred embodiment and advantage are that it stands under discharge condition for a long time, and the ability that does not have internal pressure improperly to gather.Another characteristics of preferred embodiment and advantage are its long life cycles.Another characteristics of preferred embodiment and advantage are that it possesses the ability than high 100 circulations of conventional nickel-zinc cell or higher discharge capacity.Another characteristics of preferred embodiment and advantage are contiguous positive pole of wicking layer and the negative electrode layers that adopts on its dividing plate, thereby have increased the life-span of battery and the capacity of battery.The those skilled in the art is when reading embodiment according to accompanying drawing, and the characteristics and the advantage of these and other of preferred embodiment are apparent.
With reference to accompanying drawing, similar reference number is represented similar structure and element among the figure, reads DETAILED DESCRIPTION OF THE PREFERRED, can understand preferred embodiment better.
Description of drawings
Figure 1A is the perspective view of dividing plate and zinc negative pole, has shown the folding direction of the cylindrical battery of prior art.
Figure 1B is the basis preferred embodiment of charging cell (the zinc negative pole that band vertically covers) again, and the perspective view of dividing plate and zinc negative pole has shown the folding direction of dividing plate along the long limit of zinc negative pole.
Fig. 1 C is the perspective view of preferred embodiment, has shown around the folding dividing plate of zinc negative pole.
Fig. 2 A is a perspective view anodal in the layout of Fig. 1 C.
Fig. 2 B is the battery perspective cross-sectional view according to the preferred embodiment assembling, has shown the internal placement of dividing plate and electrode jellyroll structure.
Fig. 3 illustrates with the battery that covers the zinc negative pole according to the prior art of Figure 1A and compares, and covers the battery charge and the discharge capacity of zinc negative pole according to the preferred embodiment.
Embodiment
Preferred embodiment mainly with longitudinal folding dividing plate fill the formula zinc battery again and using method relevant, more particularly, contain a zinc negative pole, positive pole, a kind of electrolyte and a dividing plate with the formula zinc battery that fills again of longitudinal folding dividing plate.Wherein, dividing plate contains at least two wicking layers, and the centre is a microporous layer; Dividing plate can be longitudinal folding, with covering zinc negative pole, thereby improves the cycle life of battery and suppress dendrite.
Shown in Figure 1A-3, for clarity, this paper has adopted specific term when describing the embodiment of preferred and alternative.Yet the present invention is not intended to be subjected to selected term to limit.Should be appreciated that each concrete element comprises that all play a role in a similar manner to finish the technology homologue of similar functions.
Referring to Figure 1A, be depicted as prior art embodiments, layout 90 wherein comprises zinc negative pole 30 and dividing plate 20, and wherein zinc negative pole 30 is generally rectangle, and comprises first end 31, second end 32, first edge 33, second edge 34, front 37, the back side 38 and electrode slice 35.Dividing plate 20 is generally rectangle, and comprises top 75, bottom 36, first edge 86, second edge 87, fold line 50, first terminal 39 and second end 40, and its median septum 20 also comprises wicking layer 22 in addition.Zinc negative pole 30 is arranged on the bottom 36 of dividing plate 20, and wherein, second end 32 of zinc negative pole 30 is pressed close to second end 40 of dividing plate 20, and the back side 38 of zinc negative pole 30 contacts with the wicking layer of dividing plate 20.It is folding along fold line 50 that prior art embodiments is advocated dividing plate 20, and after folding, first terminal 39 and second end 40 of dividing plate 20 is pressed close to, and dividing plate 20 exceeds the external dimensions of zinc negative pole 30, and electrode slice 35 runs off dividing plate 20.
It should be noted that, in the prior art of Figure 1A is arranged, 30 first edges 33 and second edge 34 of zinc negative pole open wide, so that contact with the outside, do not seal first edge 33 and second edge 34 of zinc negative pole 30 because the first half 75 of dividing plate 20 and the latter half 36 only hide.Therefore, first edge 33 of zinc negative pole and second edge 34 may move to outside first edge 86 and second edge 87 of dividing plate 20, thus with electrode roll around and when putting into battery and external container come in contact.In addition, the discrete material of zinc negative pole 30 may be moved to outside first and second edges (86,87) of dividing plate 20, and provides undesirable electrical communication between zinc negative pole 30 and any packing container.
It will be understood to one skilled in the art that, zinc negative pole 30 can be thus in the technology known method make.Such as, only being in the purpose of demonstration, the powder mixture of desired material and adhesive are generally metallic zinc and zinc oxide, can be pressed into suitable collector, for example the copper screen grid.Prior art has utilized calcium hydroxide as the other part of negative pole mixture.Yet preferred embodiment need not to comprise calcium hydroxide, does not have the zinc negative pole 30 of calcium hydroxide more to be favored.In addition, it will be understood to one skilled in the art that the various materials of preparation zinc negative pole are known by people, wherein representationally be, used adhesive material is inert material in battery context, and the quantity that is comprised is enough to mixture is maintained together.
Referring to Figure 1B-1C, as shown be a preferred embodiment that comprises layout 95.Wherein, arrange that 95 comprise zinc negative pole 30 and dividing plate 20, zinc negative pole 30 comprises first end 31, second end 32, first edge 33, second edge 34, front 37, the back side 38 and electrode slice 35.Two wicking layer 22a of one porous layer 21 and 22b, longitudinal folding line 80, first edge 51, second edge 52, first end 53, second end 54, positive 55 and the back side 56 between comprising, dividing plate 20 are arranged.Wherein, longitudinal folding line 80 almost parallels, and be arranged between first edge 51 and second edge 52 of dividing plate 20.Will be appreciated that under the situation of the spirit of preferred embodiment, other dendrite barrier layer can replace porous layer 21.
Zinc negative pole 30 is arranged on the longitudinal folding line 80 and the front between second edge of dividing plate 20.First edge 33 of zinc negative pole is configured to longitudinal folding line 80 almost parallels with dividing plate 20.Dividing plate 20 longitudinally fold line is folding, makes first edge 51 of dividing plate 20 press close to second edge 52 of dividing plate 20.Therefore, keep in touch with wicking layer 22a at the front 37 of zinc negative pole and the back side 38.1C as shown in the figure, dividing plate 20 exceeds first end 31, second end 32, first edge 33, second edge 34 of negative pole 30, and dividing plate 20 licks first edge 33 of negative pole 30, and wherein the electrode slice of zinc negative pole exceeds first edge 51 and second edge 52 of dividing plate, thereby forms structure 41.
Should be noted in the discussion above that on the contrary with above-mentioned prior art embodiment, preferred embodiment makes first edge 33 of zinc negative pole 30 be wrapped up by dividing plate 20 fully, and wherein, first edge 33 no longer contacts with container when electrode is involved in battery with dividing plate.In addition, any material that comes off from zinc negative pole 30 will be maintained in the longitudinal folding line, and not provide electrical communication between zinc negative pole 30 and any packing container.
The material that is used for dividing plate 20 should comprise and has film very thin relatively, pore structure of uniform size, to help the infiltration of wicking and electrolyte, reduces or eliminates the dendrite infiltration simultaneously.Used material should have enough elasticity and intensity, expands to tolerate any deformation and/or electrode.In a preferred embodiment, adopt a kind of laminated film, comprised two the wicking layer 22a and the 22b of porous layer both sides.As the example that has no the purpose of limiting, porous layer 21 can comprise commercially availabie CELGARD polypropylene film, and wicking layer 22a and 22b can comprise nylon nonwoven fabrics or polypropylene material.
As another example that has no the purpose of limiting, adopt to comprise the potassium hydroxide (KOH) that is approximately 10%-30% by weight or be approximately 1% lithium hydroxide, 5% potassium acetate (KAcet), about 5% cesium carbonate (CsCO by weight
3), the cesium acetate (CsAcet) of 8-15%, the about potassium stannate (K of 150ppm
2SnO
3) and about 150-200ppm indium sulfate (In
2(SO
4)
3) potassium hydroxide aqueous solution be gratifying.The saturated electrolyte of original adoption zinc oxide (ZnO) suppresses zinc oxide, and to decompose to electrolyte from electrode be desirable.Know as the sealed cell technology, used electrolyte content should be subjected to the capacity restriction, so that provide effective oxygen recombination to react at the zinc electrode place.In a preferred embodiment, before the sealed cell, can add necessary electrolyte in the open spaces at jellyroll cell device core position.
Referring to Fig. 2 A, anodal 60 comprise first end 64, second end 65, first edge 63, second edge 62, front 66, the back side 67 and electrode slice 61.Anodal 60 are arranged on the structure 41, and structure 41 comprises the layout of Fig. 1 C.Longitudinal folding line 80 almost parallels of first edge 63 and dividing plate 20.Electrode slice 61 exceeds the longitudinal folding line 80 of dividing plate 20.Anodal 60 the electrode slice position and the electrode slice 35 of zinc negative pole 30 are positioned at the opposition side of structure 41.Keep in touch with the wicking layer 22b of dividing plate 20 at anodal 60 the back side 67, in case the structure of Fig. 2 A is wound into jellyroll, shown in Fig. 2 B, the back side 67 contacts fully with the wicking layer 22b of dividing plate 20, and almost whole positive 66 all contact with the wicking layer 22b of dividing plate 20.Will be appreciated that, preferred embodiment comprise the zinc negative pole 30 that keeps in touch with wicking layer 22a with almost with the whole positive pole that contacts 60 of wicking layer 22b, thereby play the effect in extending battery life cycle, particularly under 2C or higher discharge rate.
Referring to Fig. 2 B, negative pole 30, dividing plate 20 and anodal 60 are twisted in together, form jellyroll 23, and jellyroll is placed oneself in the midst of in the shell 71, thereby constitutes battery 90.Jellyroll 23 comprises zinc negative pole 30, positive pole 60, dividing plate 20, first terminal 100 and second end 110.Wherein, first end 100 comprises electrode slice 35, and second end 110 comprises electrode slice 61, and longitudinally fold line 80 is shaped.Shell 71 comprises battery can 96, sealing ring 97 and sheath 72.Sheath 72 comprises negative terminal 75, and tank body 96 comprises positive terminal 77.Second end 110 of jellyroll 23 is configured to the sheath 72 of shell 71, and wherein, electrode slice 35 (only for exemplary purpose) for example is connected with negative terminal 75 by welding.It will be understood to one skilled in the art that preferred embodiment comprises the negative terminal 75 that keeps electrical communication with electrode slice 35, contacts with tank body 96 to prevent zinc negative pole 30.The those skilled in the art it will also be appreciated that the battery 90 of preferred embodiment can adopt prismatic or cylinder design according to specific application.Equally, the capacity of battery can change in very wide limit range, the regulation that the size conforms application-specific requires.As an example, for example, the capacity that matches of cylindrical sub-C battery is 1.5 amperes/hour.
As shown in Figure 3, preferred embodiment makes that the cycle life of battery is prolonged.As mentioned above, the discharge capacity of the cell of preferred embodiment is than high 100 circulations or more of conventional nickel-zinc cell.
Zinc negative pole 30 keeps electrical communication with sheath 72, by minimizing the metal surface area that keeps electrical communication with the zinc negative pole, generates thereby reduce the hydrogen that is not easy to recombinate in battery.If (produced hydrogen, and do not had the space of reorganization, the pressure in the battery will rise, and may cause baleful consequences.Therefore, the positive pole of preferred embodiment and tank body sheath keeps electrical communication.Under optimal conditions, the easy chemical combination of the oxygen of zinc electrode, thus reduce to result from the superpressure trend of oxygen.)
In an alternate embodiment, sheath 70 can comprise nickel outside, and steel is in the centre, copper trilaminate material inside.Wherein, copper can be zinc-plated, zinc-plated, plating indium or its compound, to reduce to cause the micro cell effect of zinc negative pole 30 venting.
In another embodiment, sheath 70 can plate with fluoropolymer resin, includes but not limited to epoxy resin, has the disparate metals under the electrolyte situation to contact with further minimizing, discharges thereby reduce hydrogen.
Foregoing description and accompanying drawing comprise the scheme explanation of preferred embodiment.Under the situation of the example of having described preferred embodiment, the those skilled in the art should be noted in the discussion above that wherein disclosed content only is exemplary in nature, can have various alternatives, repacking and modification in the scope of preferred embodiment.The step of only listing a kind of method does not in order constitute any restriction to this method step.Benefit from the viewpoint that above-mentioned explanation and accompanying drawing are expressed, those skilled in the art in the invention will find out many improvement of the present invention and other embodiments.Although wherein adopted concrete term, they only belong to general and descriptive purposes, rather than in order to limit.Therefore, preferred embodiment is not subjected to the wherein restriction of concrete exemplary scenario.
Claims (8)
1. the charging cell again with longitudinal folding dividing plate is characterized in that, described charging cell again comprises: zinc negative pole, positive pole, electrolyte, be arranged on the dividing plate between the electrode, wherein said diaphragm rings is longitudinal folding around one side of zinc negative pole.
2. the charging cell again with longitudinal folding dividing plate according to claim 1 is characterized in that, wherein said electrolyte comprises big potassium hydroxide (KOH) between 1% to 55%.
3. the charging cell again with longitudinal folding dividing plate according to claim 2 is characterized in that wherein said electrolyte comprises potassium acetate (KAcet), cesium carbonate (CsCO in addition
3) and indium sulfate (In
2(SO
4)
3).
4. the charging cell again with longitudinal folding dividing plate according to claim 3 is characterized in that wherein said electrolyte comprises potassium stannate (K in addition
2SnO
3).
5. the charging cell again with longitudinal folding dividing plate according to claim 3 is characterized in that wherein said electrolyte comprises the potassium stannate (K of 150ppm in addition
2SnO
3).
6. the charging cell again with longitudinal folding dividing plate according to claim 2 is characterized in that wherein said electrolyte comprises cesium acetate (CsAcet) and indium sulfate (In in addition
2(SO
4)
3).
7. the charging cell again with longitudinal folding dividing plate according to claim 2 is characterized in that, wherein said electrolyte comprises 15% cesium acetate (CsAcet) and the indium sulfate (In of 150ppm in addition
2(SO
4)
3).
8. the charging cell again with longitudinal folding dividing plate according to claim 1 is characterized in that wherein said dividing plate comprises at least two wicking layers, is provided with porous layer between the wicking layer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105399255A CN102024993A (en) | 2010-11-05 | 2010-11-05 | Zinc battery with longitudinal folding partition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105399255A CN102024993A (en) | 2010-11-05 | 2010-11-05 | Zinc battery with longitudinal folding partition |
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|---|---|
| CN102024993A true CN102024993A (en) | 2011-04-20 |
Family
ID=43866026
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110061308A (en) * | 2019-04-16 | 2019-07-26 | 浙江大学 | A kind of water system battery and preparation method thereof based on cyaniding frame composite material |
| CN111342136A (en) * | 2020-03-16 | 2020-06-26 | 河南创力新能源科技股份有限公司 | Iron-nickel battery additive and long-life iron-nickel battery based on additive |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101305493A (en) * | 2005-11-08 | 2008-11-12 | 株式会社Lg化学 | Electrode assembly prepared in longitudinal folding manner and electrochemical cell employing the same |
| US20100062347A1 (en) * | 2008-09-09 | 2010-03-11 | Lin-Feng Li | Rechargeable zinc cell with longitudinally-folded separator |
-
2010
- 2010-11-05 CN CN2010105399255A patent/CN102024993A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101305493A (en) * | 2005-11-08 | 2008-11-12 | 株式会社Lg化学 | Electrode assembly prepared in longitudinal folding manner and electrochemical cell employing the same |
| US20100062347A1 (en) * | 2008-09-09 | 2010-03-11 | Lin-Feng Li | Rechargeable zinc cell with longitudinally-folded separator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110061308A (en) * | 2019-04-16 | 2019-07-26 | 浙江大学 | A kind of water system battery and preparation method thereof based on cyaniding frame composite material |
| CN111342136A (en) * | 2020-03-16 | 2020-06-26 | 河南创力新能源科技股份有限公司 | Iron-nickel battery additive and long-life iron-nickel battery based on additive |
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Application publication date: 20110420 |