CN102694149A - Manufacturing equipment and manufacturing method for electrode of power type lithium ion battery - Google Patents
Manufacturing equipment and manufacturing method for electrode of power type lithium ion battery Download PDFInfo
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- CN102694149A CN102694149A CN2012101861009A CN201210186100A CN102694149A CN 102694149 A CN102694149 A CN 102694149A CN 2012101861009 A CN2012101861009 A CN 2012101861009A CN 201210186100 A CN201210186100 A CN 201210186100A CN 102694149 A CN102694149 A CN 102694149A
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Abstract
The invention discloses manufacturing equipment and a manufacturing method for an electrode of a power type lithium ion battery. The manufacturing equipment comprises a vibration disk, a foam metal die, an electrode solid-state filler powder box and foam metal, wherein the foam metal die is arranged on the vibrating disk; the electrode solid-state filler powder box is arranged above the foam metal die; and the foam metal is arranged in the foam metal die. The foam metal with the characteristics of high electric conductivity, high thermal conductivity, large specific surface area, uniform and small through holes and the like is adopted as a current collector, and a skeleton structure of the foam metal is inserted into powdery active substances for pressurization to obtain an electrode plate with strong binding force, so that the active substances difficultly fall, the electric conductivity of the active substances of the electrode is effectively improved, internal resistance is lowered, heat produced by the battery is reduced, radiation is facilitated, and the service life of the battery is prolonged; and in addition, a solid-state active substance is used for directly filling the foam metal without an aqueous solution or a non-aqueous solvent, so that the obtained electrode plate is not required to be baked to remove the solvent, the manufacture period of the battery is shortened, energy consumption is reduced, and production cost is saved.
Description
Technical field
The present invention is manufacturing equipment and the manufacturing approach thereof of a kind of power-type lithium ion battery with electrode, belongs to power-type lithium ion battery with the manufacturing equipment of electrode and the renovation technique of manufacturing approach thereof.
Background technology
Exploitation and industrialization that the problem of environmental pollution that oil shortage and burning fossil energy are brought makes countries in the world strengthen new-energy automobiles such as electric automobiles advance dynamics.Battery-driven electric automobile and hybrid vehicle can utilize nuclear power, wind-powered electricity generation and photovoltaic electric power, also can utilize conventional electric power charging at night.This is to reducing automobile to the depending on unduly of fossil fuel, and the balancing electric power demand all is significant.The power battery technology that with the lithium ion battery is representative receives the researchers' of mechanism such as national governments, enterprise, university concern, becomes one of most critical technology of electric vehicle industrialization process.
At present, for capacity, power, the life-span of further raising power-type lithium ion battery, and big quantity research has all been done by problem various countries such as reduce cost.The manufacturing approach of electrode is key and core procedure in the lithium ion battery manufacturing technology with concrete process conditions, not only has influence on the chemical property of battery, also determines production cost of cells.The manufacturing approach of lithium ion cell electrode is that active material is coated aluminium foil or Copper Foil collection liquid surface at present, processes electrode slice through baking, compressing tablet, section then.This technology and technology are particularly exported the relatively low 3C electric appliances (computer, communication, consumer electronics product) of demand with lithium ion battery for power for compact battery, are a kind of modes of production efficiently.But the power lithium-ion battery higher for power requirement, that life requirements is longer; Following problem will occur if still continue to use the mode of production of above-mentioned manufacturing pole piece: (1) is owing to lack three-dimensional mechanical fixation effect between paper tinsel shape collector and the cell active materials; Such battery in use will be very soon occur on the pole plate between the active material and the deterioration that electrically contacts between active material and the metal collector; Even cause active material to come off; The capacitance loss that causes battery reduces useful life.(2) adopt coating technique; Non-electrochemical active components such as the conductive agent of need adding larger amt, adhesive, solvent in the active material; Reduced active material ratio in the unit volume electrode slice; The existence of simultaneously a large amount of adhesives has also increased internal resistance, is unfavorable for the performance of battery material and entire cell capacity and power-performance.Caloric value when the increase of the internal resistance of cell also directly influences battery charging and discharging; And it is unfavorable to dispelling the heat; Cause battery temperature too high and internal temperature of battery is unbalanced, can make the part battery premature failure in the motive-power battery heap, cause the violent increase of battery pile maintenance and dead battery replacement cost.(3) because adhesive, close the slurry with having water or nonaqueous solvents in the solvent; Must remove through high-temperature baking technology; And along with battery plus-negative plate active material nanometerization, porous development trend are more and clearer and more definite, the removal of the solvent more and more difficult that will become.Therefore wet method film-making technology to operational environment require increasingly highly, the energy that expends is increasing, production cost of cells also rises straight line.
Owing to there is above problem, improve the pole piece manufacturing process of power-type lithium ion battery significantly, very urgent and necessary.The main effect of collector is to concentrate conduction electron, evenly distributing electric current in the electrode.Traditional electrode current collecting body is aluminium foil and Copper Foil, has aforementioned disadvantage when being used to make the power lithium ion battery electrode sheet.Wherein adopt the foam-metal current collector body of three-dimensional structure to replace aluminium foil and Copper Foil, realize that the lower electrode slice manufacture craft of energy consumption has development potentiality very much.One Chinese patent application number is to disclose a kind of collector that foam metal is used for lithium rechargeable battery in 200610154100.5 the patent application; But continue to use traditional technology full-filling collectors such as slurry, battery plus-negative plate material body of paste is mixed in solvent by active material, conductive agent and binding agent etc. and obtains.Obviously this invention still can not solve above-mentioned wet processing and make three problems that the power-type lithium ion battery pole piece is faced.
Summary of the invention
The objective of the invention is to consider the problems referred to above and provide a kind of reasonable in design that convenient and practical power-type lithium ion battery is with the manufacturing equipment of electrode.Can effectively improve the conductivity of electrode active material with the electrode of manufacturing of the present invention, reduce internal resistance, reduce the battery heat production and help heat radiation, prolongation power-type lithium ion battery useful life.
Another object of the present invention is to provide a kind of simple for production, the high power-type lithium ion battery of production efficiency is with the manufacturing approach of electrode.The present invention not only shortens the manufacturing cycle of battery, reduces energy consumption greatly, and the production cost of conserve batteries.
Technical scheme of the present invention is: power-type lithium ion battery of the present invention is with the manufacturing equipment of electrode; Include vibrating disk, foam metal mould, the solid-state inserts powder of electrode case, foam metal; Wherein the foam metal mould places on the vibrating disk; The solid-state inserts powder of electrode case places the top of foam metal mould, and foam metal places in the foam metal mould.
Foam metal after the above-mentioned filling is positioned on the objective table, and wipes off through scraping blade; Foam metal after the above-mentioned strickling is positioned in the sheet mould of the even compacting of foam metal after will filling.
Above-mentioned scraping blade is the plastics scraping blades, or the metal scraping blade, or the alloy scraping blade.
The moulding pressure of above-mentioned mould is 80-600 tons/square centimeters.The bottom of above-mentioned vibrating disc is equipped with the vibrations direction and is vibrator up and down; The material of the solid-state inserts powder of above-mentioned electrode case is plastics, or metal, or metal alloy.
The bottom surface of the solid-state inserts powder of above-mentioned electrode case has through hole, have through hole the bottom surface below be provided with baffle plate through the whereabouts of powder in the folding control active material powder case.
The through hole that the bottom surface of the solid-state inserts powder of above-mentioned electrode case has is a circular hole, and the spacing between Kong Yukong is 1-5mm, and the diameter of circular hole is 0.5mm-10mm.
Power-type lithium ion battery of the present invention comprises the steps: with the manufacturing approach of electrode
1) confirms the solid state electrode active material consumption of battery electrode and the current collector sizes of foam metal:, confirm consumption and the gauge of foam metal of the solid state electrode active material of battery according to the actual manufacturing requirement of electrokinetic cell;
2) the solid-state inserts of preparation battery electrode; The cutting foam metal: the negative or positive electrode material of battery electrode is the solid state electrode active material; The solid state electrode active material is the uniform and smooth powder; The average grain diameter of powder particle is 5nm-200 μ m, in powder particle, add solid-state conductive agent and solid-state adhesive, and stirring and evenly mixing is formed the solid-state inserts of electrode; The cutting foam metal is to required size, and the length and width size of foam metal is by the size decision of foam metal mould, and the length and width size of foam metal guarantees to put into fully wherein than the little 1-5mm of size of foam metal mould;
3) in foam metal, fill the solid-state inserts of electrode: the foam metal of well cutting is placed the foam metal mould; Pack the solid-state inserts of the above-mentioned electrode of getting ready in the solid-state inserts powder of the electrode case into; Open vibrating disk, open the solid-state inserts powder of electrode case baffle plate, powder spills through bottom surface with holes; Vibrating disc keeps vibrations, fills up to the solid-state inserts powder of electrode to finish;
4) scrape off unnecessary powder: the foam metal that will be filled with the solid-state inserts of electrode takes out from the foam metal mould, places on the objective table, and the unnecessary powder in foam metal surface after will filling with scraping blade scrapes off;
5) compression moulding: the foam metal after will filling is positioned in the mould, and the moulding pressure of being arranged to type die according to needed pole piece thickness is 80-600 tons/square centimeters, and the foam metal after filling evenly is compacted into thin slice;
6) get sheet and cut into electrode plates: above-mentioned thin slice is taken out from mould, confirm the pole piece size, with the thin slice crosscut with cut into piece, reserve the lug position during crosscut according to actual electrokinetic cell parameter needs.
The specification of above-mentioned foam metal is: PPI:5-80, porosity: 50%-98%.
The solid state electrode active material that the positive pole of above-mentioned battery adopts comprises LiFePO4 (LiFePO
4), ternary (Co, Ni, Mn), LiMn2O4 (LiMnO
2, LiMn
2O
4), phosphoric acid vanadium lithium (Li
3V
2(PO
4)
3), lithium nickelate (LiNiO
2), lithium vanadate (LiV
3O
8) in any one or a few combination, the solid state electrode active material that the negative pole of battery adopts comprises graphite, lithium titanate (Li
4Ti
5O
12), any one or a few the combination in the silicon-based anode material, tin base cathode material.
The present invention adopts foam metal as battery afflux liquid; Solid-state inserts is filled and is wherein adopted pressing technology to make the power-type lithium ion battery pole piece; Have the following advantages: (1) three-dimensional framework structure is interspersed in the solid-state inserts powder; Have the persistence three-dimensional machinery and bond stress, the active material difficult drop-off is for causing the positive and negative pole material (like tinbase and silicon-based anode material) of volume gross distortion because of removal lithium embedded causes material structure expansion-shrinkage phenomenon during discharging and recharging; Have and suppress and the rectification deformation effect, thus the life-span of bigger prolongation power-type lithium ion battery.(2) foam metal fibrous bone shelf structure specific area is huge, and electric heat conduction conductance is high, the through hole uniform and delicate; Active material is filled wherein, and the internal surface area that is in contact with it reaches maximization, has significantly shortened the transmission range of electronics; Reduced internal resistance; Strengthened the large current discharging capability of power-type lithium ion battery greatly, the heat that has been produced when having reduced heavy-current discharge also has very great help for rapid heat radiation.(3) the unique network configuration of foam metal allows to adopt solid dry powder to fill; The solid-state inserts of electrode is made up of battery active material, solid conduction agent and solid binder; Need not to add solvent, use, greatly reduce energy consumption so directly make pole piece through pressing technology without the baking stage.(4) the careful network configuration of above-mentioned foam metal is dispersed throughout in the active material; The three-dimensional machinery that adds upper skeleton bonds stress; Conductive capability and cohesiveness between active material particle have been improved greatly; A small amount of conductive agent of interpolation and binding agent reduced the dependence of active material, so just can meet the demands to conductive agent and binding agent.So, under the prerequisite that does not change the cell volume, increase the available capacity of active material in electrode plates, thereby improved the energy density of battery.
The above-mentioned silica-based lithium ion battery negative material that is considered to have the great development potentiality with tin-based material is high because of theoretical capacity, embedding lithium current potential is low; But since take off, serious change in volume (the silica-base material volume change: 280%～300% of experience in the cyclic process of embedding lithium; Tin-based material volume change: 100%～300%); The very big internal stress of generation makes silica-based and macroscopical mechanical stress tin-based material itself is not enough to opposing; Thereby cause material structure to destroy and mechanical efflorescence, between material granule and particle, lose between material granule and collector and electrically contact, the render electrical tankage is decayed rapidly.The present invention uses foam metal as the power-type lithium ion battery electrode current collecting body; Its three-dimensional careful skeleton structure has strong to electrode material and the macroscopic view of permanence bonds stress; Electrode active material to being filled in wherein has fixation, and the volume deformation that aforementioned active material is taken place in charge and discharge process has inhibition and buffering effect.The present invention provides feasibility for silica-based with the enforcement of tin base cathode material in the power-type lithium ion battery practical engineering application.
The present invention can effectively improve the conductivity of electrode active material, reduces internal resistance, reduces the battery heat production and helps heat radiation, prolongation power-type lithium ion battery useful life; In addition, the present invention has not only shortened the manufacturing cycle of battery, more greatly reduces energy consumption, has practiced thrift the battery production cost.The present invention is that a kind of design is ingenious, function admirable, and convenient and practical power-type lithium ion battery is with the manufacturing equipment and the manufacturing approach thereof of electrode.
Description of drawings
Fig. 1 is the sketch map of the solid-state inserts of the foam metal filled electrode of the present invention;
Fig. 2 is the schematic bottom view of the solid-state inserts powder of electrode of the present invention case;
Fig. 3 is the sketch map of the solid-state inserts powder of electrode of the present invention case case bottom baffle;
Fig. 4 scrapes off the sketch map of the unnecessary powder in foam metal surface for scraping blade of the present invention;
Fig. 5 is the sketch map of electrode thin slice of the present invention moulding.
Among the figure: vibrating disk 1; Foam metal mould 2; The solid-state inserts powder of electrode case 3; The bottom surface 31 of the solid-state inserts powder of electrode case; The solid-state inserts powder of electrode case baffle plate 32; Foam metal 4; Objective table 5; Scraping blade 6; Mould 7.
Embodiment
Embodiment:
Power-type lithium ion battery of the present invention is with the manufacturing equipment of electrode; Include vibrating disk 1, foam metal mould 2, the solid-state inserts powder of electrode case 3, foam metal 4; Wherein foam metal mould 2 places on the vibrating disk 1; The solid-state inserts powder of electrode case 3 places the top of foam metal mould 2, and foam metal 4 places in the foam metal mould 2.
Foam metal 4 after the above-mentioned filling is positioned on the objective table 5, and wipes off through scraping blade 6; Foam metal 4 after the above-mentioned strickling is positioned in the sheet mould 7 of foam metal 4 even compactings after will filling.
Above-mentioned scraping blade 6 is plastics scraping blades, or the metal scraping blade, or the alloy scraping blade.
The moulding pressure of above-mentioned mould 7 is 80-600 tons/square centimeters.The bottom of above-mentioned vibrating disc 1 is equipped with the vibrations direction and is vibrator up and down; The material of the solid-state inserts powder of above-mentioned electrode case 3 is plastics, or metal, or metal alloy.
The bottom surface 31 of the solid-state inserts powder of above-mentioned electrode case 3 has through hole, have through hole bottom surface 31 below be provided with baffle plate 32 through the whereabouts of powder in the folding control active material powder case 3.
The through hole that the bottom surface 31 of the solid-state inserts powder of above-mentioned electrode case 3 has is a circular hole, and the spacing between Kong Yukong is 1-5mm, and the diameter of circular hole is 0.5mm-10mm.
Above-mentioned foam metal 4 can be any one in foamed aluminium, foam aluminium alloy, nickel foam, nickel foam alloy, foam copper, the foam copper alloy, perhaps foam metal 4 be aluminize in the metal surface, copper facing, nickel plating etc.
Be the manufacture process embodiment of power type lithium-ion battery anode pole piece and cathode pole piece as follows:
1. the manufacturing of power type lithium-ion battery anode pole piece
(1) LiFePO4 (LiFePO
4) the positive electrode pole piece
The anodal solid-state inserts composition proportion of table 1
| Project | Active material | Conductive agent | Binding agent |
| Composition | LiFePO 4 | Acetylene black | PVDF |
| Mass ratio | 9.2～10 | 0～0.7 | 0～0.1 |
With the average grain diameter is the LiFePO4 (LiFePO of 500nm
4) be active material, according to the battery capacity requirement, confirm active compound lithium iron phosphate (LiFePO
4) consumption and the size of foam metal 4, in the present embodiment, foam metal 4 is foam metals of aluminizing in foamed aluminium or surface.At LiFePO
4Add a little conductive agent and binding agent in the powder, constitute the solid-state inserts of electrode, as shown in table 1, mechanical mixture is even, and is subsequent use.Foam metal according to aluminizing in the length and width size cutting foamed aluminium or the surface of foam metal mould 2 behind the well cutting, is positioned in the foam metal mould 2.Solid-state inserts powder case case bottom baffle 32 closes; Solid-state inserts powder is changed in the solid-state inserts powder case 3, open vibrating disc 1, regulate its vibrations power as required; Open baffle plate 32; Powder spills through solid-state inserts powder case bottom surface 31 and inserts in foamed aluminium or the surperficial foam metal 4 of aluminizing, and through the up-down vibration of vibrating disk 1, can guarantee the density of filling.End to be filled; Solid-state inserts powder case baffle plate 32 closes; Taking-up is filled with the foamed aluminium of solid-state inserts or the foam metal of aluminizing in the surface 4, is positioned on the objective table 5, wipes the unnecessary powder of foamed aluminium or surperficial foam metal of aluminizing 4 surfaces gently off with scraping blade 6.Put into mould 7 then and carry out extrusion forming; The moulding pressure of mould 7 is 80-600 tons/square centimeters, is pressed into the thin slice of 18-22
m.After the extrusion forming; Take out the electrode thin slice, carry out crosscut to the pole piece that suppresses and cut, note accurately reserving the lug position during crosscut according to the manufacturing specification of electrokinetic cell electrode plates; Should avoid the pole piece burr phenomena as far as possible simultaneously, cause battery short circuit in case burr punctures barrier film.
(2) LiMn2O4 (LiMn
2O
4) the positive electrode pole piece
The anodal solid-state inserts composition proportion of table 2
| Project | Active material | Conductive agent | Binding agent |
| Composition | LiMn 2O 4 | Acetylene black | PVDF |
| Mass ratio | 9.2～10 | 0～0.7 | 0～0.1 |
With average grain diameter is the LiMn2O4 (LiMn of 5 μ m
2O
4) be active material, according to the battery capacity requirement, confirm active material LiMn2O4 (LiMn
2O
4) consumption and with the size of foam metal 4, in the present embodiment, foam metal 4 is foam metals of aluminizing in foamed aluminium or surface.At LiMn
2O
4Add a little conductive agent and binding agent in the powder, constitute the solid-state inserts of electrode, as shown in table 2, mechanical mixture is even, and is subsequent use.Size according to the length and width size of foam metal mould 2 is cut foam metal 4 behind the well cutting, is positioned in the foam metal mould 2.Solid-state inserts powder case case bottom baffle 32 closes; Solid-state inserts powder is changed in the solid-state inserts powder case 3, open vibrating disc 1, regulate its vibrations power as required; Open baffle plate 32; Powder spills through solid-state inserts powder case bottom surface 31 and inserts in foamed aluminium or the surperficial foam metal 4 of aluminizing, and through the up-down vibration of vibrating disk 1, can guarantee the density of filling.End to be filled; Solid-state inserts powder case baffle plate 32 closes; Taking-up is filled with the foamed aluminium of solid-state inserts or the foam metal of aluminizing in the surface 4, is positioned on the objective table 5, wipes the unnecessary powder of foamed aluminium or surperficial foam metal of aluminizing 4 surfaces gently off with scraping blade 6.Put into mould 7 then and carry out extrusion forming; The moulding pressure of mould 7 is 80-600 tons/square centimeters, is pressed into the thin slice of 18-22
m.After the extrusion forming; Take out the electrode thin slice, carry out crosscut to the pole piece that suppresses and cut, note accurately reserving the lug position during crosscut according to the manufacturing specification of electrokinetic cell electrode plates; Should avoid the pole piece burr phenomena as far as possible simultaneously, cause battery short circuit in case burr punctures barrier film.
(3) nickle cobalt lithium manganate (LiNi
1/3Co
1/3Mn
1/3O
2) the positive electrode pole piece
The anodal solid-state inserts composition proportion of table 3
| Project | Active material | Conductive agent | Binding agent |
| Composition | LiNi 1/3Co 1/3Mn 1/3O 2 | Acetylene black | PVDF |
| Mass ratio | 9.2～10 | 0～0.7 | 0～0.1 |
With average grain diameter is the nickle cobalt lithium manganate (LiNi of 15 μ m
1/3Co
1/3Mn
1/3O
2) be active material, according to the battery capacity requirement, confirm active material nickle cobalt lithium manganate (LiNi
1/3Co
1/3Mn
1/3O
2) consumption and the size of foam metal 4, in the present embodiment, foam metal 4 is foam metals of aluminizing in foamed aluminium or surface.At LiNi
1/3Co
1/3Mn
1/3O
2Add a little conductive agent and binding agent in the powder, constitute the solid-state inserts of electrode, as shown in table 3, mechanical mixture is even, and is subsequent use.Length and width size cutting foamed aluminium (perhaps foam aluminium alloy) according to foam metal mould 2 behind the well cutting, is positioned in the foam metal mould 2.Solid-state inserts powder case case bottom baffle 32 closes; Solid-state inserts powder is changed in the solid-state inserts powder case 3, open vibrating disc 1, regulate its vibrations power as required; Open baffle plate 32; Powder spills through solid-state inserts powder case bottom surface 31 and inserts in foamed aluminium or the foam aluminium alloy, through the up-down vibration of vibrating disk 1, can guarantee the density of filling.End to be filled, the solid-state inserts powder case baffle plate 32 that closes takes out the foamed aluminium or the foam aluminium alloy that are filled with solid-state inserts, is positioned on the objective table 5, wipes the unnecessary powder of foamed aluminium or foam aluminium alloy surface gently off with scraping blade 6.Put into mould 7 then and carry out extrusion forming; The moulding pressure of mould 7 is 80-600 tons/square centimeters, is pressed into the thin slice of 18-22
m.After the extrusion forming; Take out the electrode thin slice, carry out crosscut to the pole piece that suppresses and cut, note accurately reserving the lug position during crosscut according to the manufacturing specification of electrokinetic cell electrode plates; Should avoid the pole piece burr phenomena as far as possible simultaneously, cause battery short circuit in case burr punctures barrier film.
2. the manufacturing of a power-type lithium ion battery cathode pole piece
(1) graphite cathode material pole piece
The solid-state inserts composition proportion of table 4 negative pole
| Project | Active material | Binding agent |
| Composition | Graphite | PTFE |
| Mass ratio | 9.8～10 | 0～0.15 |
The graphite (C) that with the average grain diameter is 300nm is active material, according to the battery capacity requirement, confirms the size of foam metal of consumption and foam copper or the copper coating of active material C.In powdered graphite, add a little binding agent, as shown in table 4, because the conductivity of graphite own is good, use conductive agent so need not to add, mechanical mixture is even then, constitutes the solid-state inserts of negative pole, and is subsequent use.According to the length and width size cutting of foam metal mould 2 and the size of foam metal 4, in the present embodiment, foam metal 4 is foam metals of foam copper or copper coating, behind the well cutting, places foam metal mould 2.Solid-state inserts powder case case bottom baffle 32 closes; Solid-state inserts powder is changed in the solid-state inserts powder case 3, open vibrating disc 1, regulate its vibrations power as required; Open baffle plate 32; Powder through the up-down vibration of vibrating disk 1, is guaranteed the density of filling in the bottom surface 31 of solid-state inserts powder case 3 spills the foam metal 4 of inserting foam copper or copper coating.After the end to be filled; Active material powder case baffle plate 32 closes; Taking-up is filled with the foam copper of active material or the foam metal 4 of copper coating, is positioned on the objective table 5, wipes the unnecessary powder in foam metal 4 surfaces of foam copper or copper coating off with scraping blade 6.Put into mould 7 then and carry out extrusion forming; The moulding pressure of mould 7 is 80-600 tons/square centimeters, is pressed into the thin slice of 8-12
m.After the extrusion forming; Take out the electrode thin slice, carry out crosscut to the pole piece that suppresses and cut, note accurately reserving the lug position during crosscut according to the manufacturing specification of power-type lithium ion battery electrode plates; Should avoid the pole piece burr phenomena as far as possible simultaneously, cause battery short circuit in case burr punctures barrier film.
(2) lithium titanate (Li
4Ti
5O
12) the negative material pole piece
The solid-state inserts composition proportion of table 5 negative pole
| Project | Active material | Conductive agent | Binding agent |
| Composition | Li 4Ti 5O 12 | Super P | PVDF |
| Mass ratio | 9.2～10 | 0～0.7 | 0～0.1 |
With the average grain diameter is the lithium titanate (Li of 500nm
4Ti
5O
12) be active material, according to the battery capacity requirement, confirm active material Li
4Ti
5O
12Consumption and the size of foam copper (or foam metal of copper coating).At Li
4Ti
5O
12Middle a little conductive agent and the binding agent of adding, as shown in table 5, mechanical mixture is even then, constitutes the solid-state inserts of negative pole, and is subsequent use.According to the size that the length and width size of foam metal mould 2 is cut foam metal 4, in the present embodiment, foam metal 4 is foam metals of foam copper or copper coating, behind the well cutting, places foam metal mould 2.Solid-state inserts powder case case bottom baffle 32 closes; Solid-state inserts powder is changed in the solid-state inserts powder case 3, open vibrating disc 1, regulate its vibrations power as required; Open baffle plate 32; Powder through the up-down vibration of vibrating disk 1, is guaranteed the density of filling in the bottom surface 31 of solid-state inserts powder case 3 spills the foam metal 4 of inserting foam copper or copper coating.After the end to be filled; Active material powder case baffle plate 32 closes; Taking-up is filled with the foam copper of active material or the foam metal 4 of copper coating, is positioned on the objective table 5, wipes the unnecessary powder in foam metal 4 surfaces of foam copper or copper coating off with scraping blade 6.Put into mould 7 then and carry out extrusion forming; The moulding pressure of mould 7 is 80-600 tons/square centimeters, is pressed into the thin slice of 8-12
m.After the extrusion forming; Take out the electrode thin slice, carry out crosscut to the pole piece that suppresses and cut, note accurately reserving the lug position during crosscut according to the manufacturing specification of power-type lithium ion battery electrode plates; Should avoid the pole piece burr phenomena as far as possible simultaneously, cause battery short circuit in case burr punctures barrier film.
(3) silicon-based anode material pole piece
The solid-state inserts composition proportion of table 6 negative pole
| Project | Active material | Conductive agent | Binding agent |
| Composition | SiO 2 | Acetylene black | PVDF |
| Mass ratio | 9.2～10 | 0～0.7 | 0～0.1 |
The silicon-based anode material that with the average grain diameter is 500nm is an active material, according to the battery capacity requirement, confirms active material SiO
2Consumption and the size of foam copper (perhaps foam copper alloy).At SiO
2Middle a little conductive agent and the binding agent of adding, as shown in table 6, mechanical mixture is even then, constitutes the solid-state inserts of negative pole, and is subsequent use.According to the size that the length and width size of foam metal mould 2 is cut foam metal 4, in the present embodiment, foam metal 4 is foam copper or foam copper alloy, behind the well cutting, places foam metal mould 2.Solid-state inserts powder case case bottom baffle 32 closes; Solid-state inserts powder is changed in the solid-state inserts powder case 3, open vibrating disc 1, regulate its vibrations power as required; Open baffle plate 32; Powder spills through the bottom surface 31 of solid-state inserts powder case 3 and inserts in foam copper or the foam copper alloy, through the up-down vibration of vibrating disk 1, guarantees the density of filling.After the end to be filled, the active material powder case baffle plate 32 that closes takes out the foam copper or the foam copper alloy 4 that are filled with active material, is positioned on the objective table 5, wipes foam copper or the unnecessary powder of foam copper alloy surface off with scraping blade 6.Put into mould 7 then and carry out extrusion forming; The moulding pressure of mould 7 is 80-600 tons/square centimeters, is pressed into the thin slice of 8-12
m.After the extrusion forming; Take out the electrode thin slice, carry out crosscut to the pole piece that suppresses and cut, note accurately reserving the lug position during crosscut according to the manufacturing specification of power-type lithium ion battery electrode plates; Should avoid the pole piece burr phenomena as far as possible simultaneously, cause battery short circuit in case burr punctures barrier film.
Claims (10)
1. a power-type lithium ion battery is with the manufacturing equipment of electrode; It is characterized in that including vibrating disk (1), foam metal mould (2), the solid-state inserts powder of electrode case (3), foam metal (4); Wherein foam metal mould (2) places on the vibrating disk (1); The solid-state inserts powder of electrode case (3) places the top of foam metal mould (2), and foam metal (4) places in the foam metal mould (2).
2. power-type lithium ion battery according to claim 1 is characterized in that with the manufacturing equipment of electrode the foam metal (4) after the above-mentioned filling is positioned on the objective table (5), and wipes off through scraping blade (6); Foam metal after the above-mentioned strickling (4) is positioned in the even sheet mould of compacting (7) of foam metal (4) after will filling.
3. power-type lithium ion battery according to claim 2 is characterized in that with the manufacturing equipment of electrode above-mentioned scraping blade (6) is the plastics scraping blades, or the metal scraping blade, or the alloy scraping blade.
4. power-type lithium ion battery according to claim 2 is characterized in that with the manufacturing equipment of electrode the moulding pressure of above-mentioned mould (7) is 80-600 tons/square centimeters.
5. according to the manufacturing equipment of each described power-type lithium ion battery of claim 1 to 4 with electrode, the bottom that it is characterized in that above-mentioned vibrating disc (1) is equipped with the vibrations direction and is vibrator up and down; The material of the solid-state inserts powder of above-mentioned electrode case (3) is plastics, or metal, or metal alloy.
6. power-type lithium ion battery according to claim 5 is with the manufacturing equipment of electrode; The bottom surface (31) that it is characterized in that the solid-state inserts powder of above-mentioned electrode case (3) has through hole, have through hole bottom surface (31) below be provided with baffle plate (32) through the whereabouts of the interior powder of folding control active material powder case (3).
7. power-type lithium ion battery according to claim 5 is with the manufacturing equipment of electrode; It is characterized in that the through hole that the bottom surface (31) of the solid-state inserts powder of above-mentioned electrode case (3) has is a circular hole; Spacing between Kong Yukong is 1-5mm, and the diameter of circular hole is 0.5mm-10mm.
8. power-type lithium ion battery according to claim 1 is characterized in that comprising the steps: with the manufacturing approach of electrode
1) confirm battery electrode solid state electrode active material consumption and current collector sizes: the consumption that requires to confirm the solid state electrode active material of battery according to the actual manufacturing of electrokinetic cell; And definite collector adopts foam metal (4), and requires to confirm the gauge of foam metal (4) according to the actual manufacturing of electrokinetic cell;
2) the solid-state inserts of preparation battery electrode; Cutting foam metal (4): the negative or positive electrode material of battery electrode is the solid state electrode active material; The solid state electrode active material is the uniform and smooth powder; The average grain diameter of powder particle is 5nm-200 μ m, in powder particle, add solid-state conductive agent and solid-state adhesive, and stirring and evenly mixing is formed the solid-state inserts of electrode; Cutting foam metal (4) is to required size, and the length and width size of foam metal (4) is by the size decision of foam metal mould (2), and the length and width size of foam metal (4) guarantees to put into fully wherein than the little 1-5mm of size of foam metal mould (2);
3) in foam metal (4), fill the solid-state inserts of electrode: the foam metal (4) of well cutting is placed foam metal mould (2); Pack the solid-state inserts of the above-mentioned electrode of getting ready in the solid-state inserts powder of the electrode case (3) into; Open vibrating disk (1), open the solid-state inserts powder of electrode case baffle plate (32), powder spills through bottom surface with holes (31); Vibrating disc (1) keeps vibrations, fills up to the solid-state inserts powder of electrode to finish;
4) scrape off unnecessary powder: the foam metal (4) that will be filled with the solid-state inserts of electrode takes out from foam metal mould (2), places on the objective table (5), and the surperficial unnecessary powder of foam metal (4) after will filling with scraping blade (6) scrapes off;
5) compression moulding: the foam metal after will filling (4) is positioned in the mould (7); The moulding pressure of being arranged to type die (7) according to needed pole piece thickness is 80-600 tons/square centimeters, and the foam metal (4) after filling evenly is compacted into thin slice;
6) get sheet and cut into electrode plates: above-mentioned thin slice is taken out from mould (7), confirm the pole piece size, with the thin slice crosscut with cut into piece, reserve the lug position during crosscut according to actual electrokinetic cell parameter needs.
9. power-type lithium ion battery according to claim 8 is characterized in that the specification of above-mentioned foam metal (4) is: PPI:5-80, porosity: 50%-98% with the manufacturing approach of electrode.
10. power-type lithium ion battery according to claim 8 is characterized in that with the manufacturing approach of electrode the solid state electrode active material of the positive pole employing of above-mentioned battery comprises LiFePO4 (LiFePO
4), ternary (Co, Ni, Mn), LiMn2O4 (LiMnO
2, LiMn
2O
4), phosphoric acid vanadium lithium (Li
3V
2(PO
4)
3), lithium nickelate (LiNiO
2), lithium vanadate (LiV
3O
8) in any one or a few combination, the solid state electrode active material that the negative pole of battery adopts comprises graphite, lithium titanate (Li
4Ti
5O
12), any one or a few the combination in the silicon-based anode material, tin base cathode material.
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