CN102290568A - 100 ampere hour (AH) lithium iron phosphate square battery and manufacturing process thereof - Google Patents
100 ampere hour (AH) lithium iron phosphate square battery and manufacturing process thereof Download PDFInfo
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- CN102290568A CN102290568A CN2011102086817A CN201110208681A CN102290568A CN 102290568 A CN102290568 A CN 102290568A CN 2011102086817 A CN2011102086817 A CN 2011102086817A CN 201110208681 A CN201110208681 A CN 201110208681A CN 102290568 A CN102290568 A CN 102290568A
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Abstract
The invention discloses a 100 ampere hour (AH) lithium iron phosphate square battery and a manufacturing process thereof. The process comprises the following steps of: (1) preparing materials; (2) coating; (3) baking; (4) rolling; (5) manufacturing battery pole pieces; (6) laminating; (7) assembling a battery; (8) thermally sealing; (9) filling liquid; (10) forming; and (11) performing capacity grading, wherein in the step (1) of preparing the materials, positive and negative slurry is prepared by a water-based rubber formula without any pollution, and the formula is completely environment-friendly. Solvents are not released from the prepared positive and negative slurry, so that the battery and the process meet the environmental requirement, are low in cost and are safely used. Compared with an oil system, a water system has relatively soft pole pieces which can be wound repeatedly.
Description
Technical field
The present invention relates to a kind of ferric phosphate lithium cell and manufacture craft thereof.
Background technology
Energy crisis, shortage of resources, environmental pollution are the three big severe challenges that human survival faces, and seeking secondary resource clean, renewable, resource-conserving is the vital task that realizes that human social will solve.
Raising along with expanding economy and living standards of the people, people are more and more strong to the battery requirements of high-energy-density, lithium ion battery have operating voltage height, energy density big, have extended cycle life, advantages such as self-discharge rate is little, environmental protection, become the trend of secondary cell development.Now be widely used in portable electricity consuming productses such as wireless telecommunications, digital camera, and progressively in special dimension extensive uses such as aviation, national defence, submarines.
LiCoO
2Be to make the positive electrode that lithium battery uses the earliest,, in compact battery, be applied because of advantages such as it are easy to synthesize, voltage platform height, specific energy are moderate.Yet LiCoO
2Resource scarcity, cost an arm and a leg and the insecurity of overcharging has determined it not to be used widely in high capacity cell.LiMn
2O
4Be the another kind of positive electrode of making lithium battery, because of its capacity is low, high temperature cyclic performance is poor, has also limited its extensive use.LiFePO
4Be another positive electrode of making lithium battery, specific capacity height not only, particularly its thermally-stabilised good, security performance is superior, the outstanding feature of good cycle, is considered to the desirable manufacturing materials of lithium battery anode.
Though lithium iron phosphate dynamic battery has the unrivaled series of advantages of other materials, its part that also comes with some shortcomings mainly shows: 1, pure LiFePO
4Electrical conductance and ions diffusion poor performance.2, LiFePO
4Apparent density and tap density lower, be difficult for processing.
Therefore, the properties of product of lithium iron phosphate dynamic battery and manufacture craft need further to improve.
Summary of the invention
The object of the present invention is to provide a kind of manufacture craft of 100AH LiFePO4 rectangular cell, this processing step is simple, and lithium battery electrical conductance and the ions diffusion performance made are good.
To achieve these goals, the technical solution of employing is:
The manufacture craft of 100AH LiFePO4 rectangular cell may further comprise the steps: (1) batching, (2) coating, (3) baking, (4) roll-in, the making of (5) battery pole piece, the operation of (6) lamination, the assembling of (7) battery, (8) heat-sealing, (9) fluid injection, (10) change into, (11) partial volume;
Following steps are improved:
(1) batching:
Preparation is the anode sizing agent of medium with water, material requested has: water system glue 3%～5%, LiFePO4 88%～94%, superconduction carbon black 0.5%～4%, electrically conductive graphite 1.5%～5%, lithium salts 0.5%～1% is added to the water water system glue and carries out agitation and dilution, adding superconduction carbon black and electrically conductive graphite stirring add LiFePO4 at last and lithium salts stirs into slurry;
Preparation is the cathode size of medium with water, and material requested has: graphite 91%～96%, sodium carboxymethylcellulose 1%～3%, superconduction carbon black 0.1%～2%, butadiene-styrene rubber 2%～4%; Sodium carboxymethylcellulose added in the entry stir, after staticly settling, add superconduction carbon black and graphite and stir, add butadiene-styrene rubber at last and stir into slurry;
(2) coating:
Positive pole after sieving and cathode size are coated in respectively on the corresponding plus plate current-collecting body and negative current collector equably, and reserve uncoated zone, as the lug district, put into the coating machine oven baking then, this process is used four sections temperature bakings, first section baking temperature of positive plate between 55 ℃～65 ℃, second section baking temperature between 75 ℃～100 ℃, the 3rd section baking temperature between 75 ℃～100 ℃, the 4th section baking temperature is between 60 ℃～80 ℃; First section baking temperature of negative plate between 50 ℃～65 ℃, second section baking temperature between 60 ℃～90 ℃, the 3rd section baking temperature be at 65 ℃～90 ℃, the 4th section baking temperature is between 60 ℃～80 ℃; The linear velocity plus plate current-collecting body of coating is 4.5 meters of per minutes, and negative current collector is 5 meters of per minutes, after coating is finished, each pole piece is cut into slices;
(3) baking:
Section is toasted, baking is 24 hours in vacuum oven, vacuum degree is not less than-0.08MPa, and baking temperature is 100 ℃, every ventilation in 2～4 hours once, the ventilation back kept 30 minutes, and then vacuumize, stoving time finishes, and temperature is reduced to below 45 ℃, baking box is taken out in section, forwarded to subsequent processing then;
(4) roll-in:
Roll process, with the positive plate roll-in to thickness at 125 μ m～145 μ m, compacted density is at 1.9g/cm
3～2.3g/cm
3With the negative plate roll-in to thickness at 85 μ m～100 μ m, compacted density is at 1.3g/cm
3～1.6g/cm
3
(5) battery pole piece is made:
Positive plate is cut into the rectangular sheet that has a lug, and negative pole is cut into the rectangular sheet that has a lug;
Positive plate is of a size of 130mm*210mm;
Negative plate is of a size of 140mm*220mm.
Further, described (1) batching:
Preparation is the anode sizing agent of medium with water, material requested has: water system glue 3%, LiFePO4 93%, superconduction carbon black 1.5%, electrically conductive graphite 1.5%, lithium salts 1% is added to the water water system glue and carries out agitation and dilution, adding superconduction carbon black and electrically conductive graphite stirring add LiFePO4 at last and lithium salts stirs into slurry;
Preparation is the cathode size of medium with water, and material requested has: graphite 94.5%, sodium carboxymethylcellulose 1.5%, superconduction carbon black 1.5%, butadiene-styrene rubber 2.5%; Sodium carboxymethylcellulose added in the entry stir, after staticly settling, add superconduction carbon black and graphite and stir, add butadiene-styrene rubber at last and stir into slurry;
(4) roll-in:
Roll process, with the positive plate roll-in to thickness at 140 μ m, compacted density is at 2.1g/cm
3With the negative plate roll-in to thickness at 100 μ m, compacted density is at 1.35g/cm
3
Further, deionized water is used in the operation of described (1) batching.
Another object of the present invention provides a kind of 100AH LiFePO4 rectangular cell of being made by above-mentioned manufacture craft.
To achieve these goals, the technical solution of employing is:
100AH LiFePO4 rectangular cell, comprise positive plate and negative plate, described positive plate has plus plate current-collecting body and the positive electrode active material that is coated on the plus plate current-collecting body, positive electrode active material is made after evenly being mixed by water, water system glue, LiFePO4, superconduction carbon black, electrically conductive graphite, lithium salts, described negative plate has negative current collector and the negative electrode active material that is coated on the negative current collector, and negative electrode active material is made after evenly being mixed by water, graphite, sodium carboxymethylcellulose, superconduction carbon black, butadiene-styrene rubber.
Further, described plus plate current-collecting body adopts aluminium foil to make, and negative current collector adopts Copper Foil to make.
Beneficial effect of the present invention:
(1) the positive and negative electrode slurry adopts water system glue prescription, can not produce any pollution, is the prescription of complete environmental protection.The solvent-free release of positive and negative electrode slurry that is prepared into meets environmental requirement, and cost is low, and is safe in utilization.Compare with the oiliness system, the pole piece of water-based system is comparatively soft, stands repeatedly and reels.And, adopt the pole piece of water-based system to have good electrochemical, can reduce the interface impedance and the internal resistance of cell, improve the cycle performance of battery.After tested, the battery that this kind mode prepares is after experience discharges and recharges for 2000 times, and the electric power storage ability of battery is not less than 80% of new battery electric power storage ability.
(2) in the anode sizing agent manufacturing process, added an amount of lithium salts, can be good at controlling the bulging that battery producing gas causes, and can improve the capacity of positive electrode active materials.
(3) manufacture craft of this kind ferric phosphate lithium cell is simple, handy and operation, fail safe and good stability; The raw material wide material sources, low price, cost is low.
Embodiment
Embodiment 1
The manufacture craft of 100AH LiFePO4 rectangular cell may further comprise the steps: (1) batching, (2) coating, (3) baking, (4) roll-in, the making of (5) battery pole piece, the operation of (6) lamination, the assembling of (7) battery, (8) heat-sealing, (9) fluid injection, (10) change into, (11) partial volume;
(1) batching:
Preparation is the anode sizing agent of medium with water, and material requested has: water system glue 3%, LiFePO4 92%, superconduction carbon black 2%, electrically conductive graphite 2%, lithium salts 1%, water system glue is added to the water carries out agitation and dilution, add superconduction carbon black and electrically conductive graphite and stir, add LiFePO4 at last and lithium salts stirs into slurry.
Preparation is the cathode size of medium with water, and material requested has: graphite 91%, sodium carboxymethylcellulose 3%, superconduction carbon black 2%, butadiene-styrene rubber 4%; Sodium carboxymethylcellulose added in the entry stir, after staticly settling, add superconduction carbon black and graphite and stir, add butadiene-styrene rubber at last and stir into slurry.
(2) coating:
Positive pole after sieving and cathode size are coated in respectively on the corresponding plus plate current-collecting body and negative current collector equably, and reserve uncoated zone, as the lug district, put into the coating machine oven baking then, this process is used four sections temperature bakings, first section baking temperature of positive plate is 55 ℃, and second section baking temperature is that 75 ℃, the 3rd section baking temperature is 75 ℃, and the 4th section baking temperature is being 60 ℃; First section baking temperature of negative plate is 50 ℃, and second section baking temperature is that 60 ℃, the 3rd section baking temperature is 65 ℃, and the 4th section baking temperature is 60 ℃; The linear velocity plus plate current-collecting body of coating is 4.5 meters of per minutes, and negative current collector is 5 meters of per minutes, after coating is finished, pole piece is cut into slices.
(3) baking:
Section is toasted, baking is 24 hours in vacuum oven, vacuum degree is not less than-0.08MPa, and baking temperature is 100 ℃, every ventilation in 2 hours once, the ventilation back kept 30 minutes, and then vacuumize, stoving time finishes, and temperature is reduced to below 45 ℃, baking box is taken out in section, forwarded to subsequent processing then.
(4) roll-in:
Roll process, with the positive plate roll-in to thickness 125 μ m, compacted density 1.9g/cm
3With the negative plate roll-in to thickness 85 μ m, compacted density 1.3g/cm
3
(5) battery pole piece is made:
Positive plate is cut into the rectangular sheet that has monopole ear, and negative pole is cut into the rectangular sheet that has monopole ear;
Positive plate is of a size of 130mm*210mm;
Negative plate is of a size of 140mm*220mm;
Diaphragm size is 149mm*468mm.
(6) lamination:
The lamination mould is set level in operating desk near the health dead ahead, negative plate placed be placed on lamination personnel left side in the clean stainless steel disc, positive plate is placed on the right side, and barrier film is placed on lamination mould top, and left hand is taken a barrier film, the right hand is taken a negative plate, alignd with the barrier film folding line in cathode pole piece bottom then, about equate with the barrier film surplus, be in barrier film central authorities, place the lamination mould then, as first.Left hand is taken a barrier film, and the right hand is taken a positive plate, then there is the 1.5mm gap anode pole piece bottom approximately with the barrier film folding line, about equate with the barrier film surplus, be in barrier film central authorities, place the lamination mould then, as second.Left hand is taken a negative plate, places the lamination mould then, aligns with the barrier film folding line in the cathode pole piece bottom, about equate with the barrier film surplus, be in barrier film central authorities, as the 3rd.The rest may be inferred, places piecewise and carry out lamination.Positive plate has been folded, and last a slice is placed negative plate, and is identical with first lamination.The electric core the superiors that fold and orlop are the negative pole of bag barrier film.Fold the back and provoke bottom negative plate with right hand tweezers, left-hand finger pinches one jiao in electric core, tears the adhesive tape of getting on the Tape Dispenser with tweezers then, below with tweezers adhesive tape being goed deep into, with the tight electric core of hand adhesive tape is glued.
(7) battery assembling:
After lamination finishes, positive and negative lug is welded, be placed on the puncher position and carry out the lug punching, use screw that positive and negative lug is assembled on the corresponding battery electrode column then, afterwards, electric core is slowly put into plastic casing.
(8) heat-sealing:
Change the battery after finishing short-circuit test and toasting over to the heat-sealing workshop, seal.
(9) fluid injection:
Battery liquid-filling adopts the fluid injection of semi-automatic vacuum fluid injection machine, feeds high-purity argon gas in the time of fluid injection, and the reservoir quantity of lithium-ion-power cell needs according to its calculation of capacity, and its reservoir quantity is about 7g/Ah; Used electrolyte is LiPF6/EC, DMC, the EMC of 1M, and the environment control of fluid injection is extremely important, so must finish fluid injection in glove box, fluid injection is injected from the liquid injection hole of battery cap usually.
(10) change into:
Formation process must disposablely be finished incessantly, changes into curve and answers smooth binding, and electric current should be controlled at electric current should be controlled at 2A/30min, 4A/120min, 8A/210min.
(11) partial volume:
The battery that the every index of electrical property is all met technological requirement separates with the battery that every electrical performance indexes does not reach technological requirement, puts warehouse-in respectively.
More preferably:
Described (1) batching:
Preparation is the anode sizing agent of medium with the deionized water, material requested has: LA132 water system glue 3%, LiFePO4 93%, superconduction carbon black 1.5%, electrically conductive graphite 1.5%, lithium salts 1% is added to the water water system glue and carries out agitation and dilution, adding superconduction carbon black and electrically conductive graphite stirring add LiFePO4 at last and lithium salts stirs into slurry.
Preparation is the cathode size of medium with the deionized water, and material requested has: graphite 94.5%, sodium carboxymethylcellulose 1.5%, superconduction carbon black 1.5%, butadiene-styrene rubber 2.5%; Sodium carboxymethylcellulose added in the entry stir, after staticly settling, add superconduction carbon black and graphite and stir, add butadiene-styrene rubber at last and stir into slurry.
(4) roll-in:
Roll process is 140 μ m with positive plate roll-in to thickness, and compacted density is 2.1g/cm
3With negative plate roll-in to thickness is 100 μ m, and compacted density is 1.35g/cm
3
Embodiment 2
The manufacture craft of 100AH LiFePO4 rectangular cell comprises and other following steps of embodiment 1 phase region:
(1) batching:
Preparation is the anode sizing agent of medium with water, material requested has: water system glue 3%, LiFePO4 94%, superconduction carbon black 1.5%, electrically conductive graphite 1%, lithium salts 0.5% is added to the water water system glue and carries out agitation and dilution, adding superconduction carbon black and electrically conductive graphite stirring add LiFePO4 at last and lithium salts stirs into slurry.
Preparation is the cathode size of medium with water, and material requested has: graphite 96%, sodium carboxymethylcellulose 1%, superconduction carbon black 1%, butadiene-styrene rubber 2%; Sodium carboxymethylcellulose added in the entry stir, after staticly settling, add superconduction carbon black and graphite and stir, add butadiene-styrene rubber at last and stir into slurry.
(2) coating:
Positive pole after sieving and cathode size are coated in respectively on the corresponding plus plate current-collecting body and negative current collector equably, and reserve uncoated zone, as the lug district, put into the coating machine oven baking then, this process is used four sections temperature bakings, first section baking temperature of positive plate is 65 ℃, and second section baking temperature is that 100 ℃, the 3rd section baking temperature is 100 ℃, and the 4th section baking temperature is 80 ℃; First section baking temperature of negative plate is 65 ℃, and second section baking temperature is that 90 ℃, the 3rd section baking temperature is 90 ℃, and the 4th section baking temperature is 80 ℃; The linear velocity plus plate current-collecting body of coating is 4.5 meters of per minutes, and negative current collector is 5 meters of per minutes, after coating is finished, each pole piece is cut into slices.
(3) baking:
Section is toasted, baking is 24 hours in vacuum oven, vacuum degree is not less than-0.08MPa, and baking temperature is 100 ℃, every ventilation in 4 hours once, the ventilation back kept 30 minutes, and then vacuumize, stoving time finishes, and temperature is reduced to below 45 ℃, baking box is taken out in section, forwarded to subsequent processing then.
(4) roll-in:
Roll process is 145 μ m with positive plate roll-in to thickness, and compacted density is 2.3g/cm
3With negative plate roll-in to thickness is 100 μ m, and compacted density is 1.6g/cm
3
Embodiment 3
The manufacture craft of 100AH LiFePO4 rectangular cell comprises and embodiment 1, other following steps of embodiment 2 phase regions:
(1) batching:
Preparation is the anode sizing agent of medium with water, material requested has: water system glue 4%, LiFePO4 92%, superconduction carbon black 2%, electrically conductive graphite 1.5%, lithium salts 0.5% is added to the water water system glue and carries out agitation and dilution, adding superconduction carbon black and electrically conductive graphite stirring add LiFePO4 at last and lithium salts stirs into slurry.
Preparation is the cathode size of medium with water, and material requested has: graphite 94%, sodium carboxymethylcellulose 2%, superconduction carbon black 1%, butadiene-styrene rubber 3%; Sodium carboxymethylcellulose added in the entry stir, after staticly settling, add superconduction carbon black and graphite and stir, add butadiene-styrene rubber at last and stir into slurry.
(2) coating:
Positive pole after sieving and cathode size are coated in respectively on the corresponding plus plate current-collecting body and negative current collector equably, and reserve uncoated zone, as the lug district, put into the coating machine oven baking then, this process is used four sections temperature bakings, first section baking temperature of positive plate is 60 ℃, and second section baking temperature is that 85 ℃, the 3rd section baking temperature is 90 ℃, and the 4th section baking temperature is 70 ℃; First section baking temperature of negative plate is 60 ℃, and second section baking temperature is that 75 ℃, the 3rd section baking temperature is 80 ℃, and the 4th section baking temperature is 70 ℃; The linear velocity plus plate current-collecting body of coating is 4.5 meters of per minutes, and negative current collector is 5 meters of per minutes, after coating is finished, each pole piece is cut into slices.
(3) baking:
Section is toasted, baking is 24 hours in vacuum oven, vacuum degree is not less than-0.08MPa, and baking temperature is 100 ℃, every ventilation in 3 hours once, the ventilation back kept 30 minutes, and then vacuumize, stoving time finishes, and temperature is reduced to below 45 ℃, baking box is taken out in section, forwarded to subsequent processing then.
(4) roll-in:
Roll process, with the positive plate roll-in to thickness at 135 μ m, compacted density is at 2g/cm
3With the negative plate roll-in to thickness at 95 μ m, compacted density is at 1.45g/cm
3
With the lithium-ion-power cell that the method is made, not only capacity is big, and multiplying power discharging greatly.
Embodiment 4
The 100AH LiFePO4 rectangular cell that adopts the foregoing description manufacture craft to make, comprise positive plate and negative plate, described positive plate has plus plate current-collecting body and the positive electrode active material that is coated on the plus plate current-collecting body, positive electrode active material is made after evenly being mixed by water, water system glue, LiFePO4, superconduction carbon black, electrically conductive graphite, lithium salts, described negative plate has negative current collector and the negative electrode active material that is coated on the negative current collector, and negative electrode active material is made after evenly being mixed by water, graphite, sodium carboxymethylcellulose, superconduction carbon black, butadiene-styrene rubber.
Further, described plus plate current-collecting body adopts aluminium foil to make, and negative current collector adopts Copper Foil to make.
Certainly, above-mentioned explanation is not to be limitation of the present invention, and the present invention also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present invention also should belong to protection scope of the present invention.
Claims (5)
1.100AH the manufacture craft of LiFePO4 rectangular cell may further comprise the steps: (1) batching, (2) coating, (3) baking, (4) roll-in, the making of (5) battery pole piece, the operation of (6) lamination, the assembling of (7) battery, (8) heat-sealing, (9) fluid injection, (10) change into, (11) partial volume; It is characterized in that:
(1) batching:
Preparation is the anode sizing agent of medium with water, material requested has: water system glue 3%～5%, LiFePO4 88%～94%, superconduction carbon black 0.5%～4%, electrically conductive graphite 1.5%～5%, lithium salts 0.5%～1% is added to the water water system glue and carries out agitation and dilution, adding superconduction carbon black and electrically conductive graphite stirring add LiFePO4 at last and lithium salts stirs into slurry;
Preparation is the cathode size of medium with water, and material requested has: graphite 91%～96%, sodium carboxymethylcellulose 1%～3%, superconduction carbon black 0.1%～2%, butadiene-styrene rubber 2%～4%; Sodium carboxymethylcellulose added in the entry stir, after staticly settling, add superconduction carbon black and graphite and stir, add butadiene-styrene rubber at last and stir into slurry;
(2) coating:
Positive pole after sieving and cathode size are coated in respectively on the corresponding plus plate current-collecting body and negative current collector equably, and reserve uncoated zone, as the lug district, put into the coating machine oven baking then, this process is used four sections temperature bakings, first section baking temperature of positive plate between 55 ℃～65 ℃, second section baking temperature between 75 ℃～100 ℃, the 3rd section baking temperature between 75 ℃～100 ℃, the 4th section baking temperature is between 60 ℃～80 ℃; First section baking temperature of negative plate between 50 ℃～65 ℃, second section baking temperature between 60 ℃～90 ℃, the 3rd section baking temperature be at 65 ℃～90 ℃, the 4th section baking temperature is between 60 ℃～80 ℃; The linear velocity plus plate current-collecting body of coating is 4.5 meters of per minutes, and negative current collector is 5 meters of per minutes, after coating is finished, each pole piece is cut into slices;
(3) baking:
Section is toasted, baking is 24 hours in vacuum oven, vacuum degree is not less than-0.08MPa, and baking temperature is 100 ℃, every ventilation in 2～4 hours once, the ventilation back kept 30 minutes, and then vacuumize, stoving time finishes, and temperature is reduced to below 45 ℃, baking box is taken out in section, forwarded to subsequent processing then;
(4) roll-in:
Roll process, with the positive plate roll-in to thickness at 125 μ m～145 μ m, compacted density is at 1.9g/cm
3～2.3g/cm
3With the negative plate roll-in to thickness at 85 μ m～100 μ m, compacted density is at 1.3g/cm
3～1.6g/cm
3
(5) battery pole piece is made:
Positive plate is cut into the rectangular sheet that has a lug, and negative pole is cut into the rectangular sheet that has a lug;
Positive plate is of a size of 130mm*210mm;
Negative plate is of a size of 140mm*220mm.
2. the manufacture craft of 100AH LiFePO4 rectangular cell according to claim 1 is characterized in that: described
(1) batching:
Preparation is the anode sizing agent of medium with water, material requested has: water system glue 3%, LiFePO4 93%, superconduction carbon black 1.5%, electrically conductive graphite 1.5%, lithium salts 1% is added to the water water system glue and carries out agitation and dilution, adding superconduction carbon black and electrically conductive graphite stirring add LiFePO4 at last and lithium salts stirs into slurry;
Preparation is the cathode size of medium with water, and material requested has: graphite 94.5%, sodium carboxymethylcellulose 1.5%, superconduction carbon black 1.5%, butadiene-styrene rubber 2.5%; Sodium carboxymethylcellulose added in the entry stir, after staticly settling, add superconduction carbon black and graphite and stir, add butadiene-styrene rubber at last and stir into slurry;
(4) roll-in:
Roll process, with the positive plate roll-in to thickness at 140 μ m, compacted density is at 2.1g/cm
3With the negative plate roll-in to thickness at 100 μ m, compacted density is at 1.35g/cm
3
3. the manufacture craft of 100AH LiFePO4 rectangular cell according to claim 1 is characterized in that: the operation of described (1) batching, use deionized water.
4. the 100AH LiFePO4 rectangular cell of making according to the described technology of claim 1, it is characterized in that: described battery comprises positive plate and negative plate, described positive plate has plus plate current-collecting body and the positive electrode active material that is coated on the plus plate current-collecting body, positive electrode active material is made after evenly being mixed by water, water system glue, LiFePO4, superconduction carbon black, electrically conductive graphite, lithium salts, described negative plate has negative current collector and the negative electrode active material that is coated on the negative current collector, and negative electrode active material is made after evenly being mixed by water, graphite, sodium carboxymethylcellulose, superconduction carbon black, butadiene-styrene rubber.
5. 100AH LiFePO4 rectangular cell according to claim 4 is characterized in that: described plus plate current-collecting body adopts aluminium foil to make, and negative current collector adopts Copper Foil to make.
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| CN106328902A (en) * | 2016-10-19 | 2017-01-11 | 江苏海四达电源股份有限公司 | High-capacity lithium-ion power battery for electromobiles and preparation method thereof |
| CN108155348A (en) * | 2017-12-28 | 2018-06-12 | 长沙善道新材料科技有限公司 | Preparation method of silicon/carbon/graphite in lithium ion batteries alkene-titanium dioxide cathode piece a kind of of high adhesion force low roughness and preparation method thereof |
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| CN108155348B (en) * | 2017-12-28 | 2020-11-13 | 长沙善道新材料科技有限公司 | Preparation method and preparation method of high-adhesion low-roughness graphene-titanium dioxide negative plate of lithium ion battery |
| CN109065818A (en) * | 2018-06-28 | 2018-12-21 | 合肥国轩高科动力能源有限公司 | Low-short-circuit-rate lithium ion power battery pole piece and preparation method thereof |
| CN110429276A (en) * | 2018-07-25 | 2019-11-08 | 宁夏汉尧石墨烯储能材料科技有限公司 | The preparation method of Low ESR ferric phosphate lithium cell |
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