CN105845966A - Pole plate separated lithium ion battery and manufacturing method thereof - Google Patents
Pole plate separated lithium ion battery and manufacturing method thereof Download PDFInfo
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- CN105845966A CN105845966A CN201610075800.9A CN201610075800A CN105845966A CN 105845966 A CN105845966 A CN 105845966A CN 201610075800 A CN201610075800 A CN 201610075800A CN 105845966 A CN105845966 A CN 105845966A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Battery Electrode And Active Subsutance (AREA)
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Abstract
The invention relates to a pole plate separated lithium ion battery and a manufacturing method thereof. The pole plate separated lithium ion battery comprises positive and negative electrode cavities, two or more pipes communicate the positive and negative electrode cavities, a stirrer is arranged in each one of the positive and negative electrode cavities and the pipes, each one of the positive and negative electrode cavities and the pipes is filled with an electrolyte, positive and negative electrode current collectors are arranged in the positive and negative electrode cavities, the positive current collector is connected to a positive pole arranged on the positive electrode cavity, the negative electrode current collector is connected to a negative pole arranged on the negative electrode cavity and the positive and negative electrode cavities are respectively provided with openable and pluggable gas vents. The manufacturing method comprises respectively putting positive and negative electrode current collectors into the positive and negative electrode cavities, injecting an electrolyte into the positive and negative electrode cavities, filling the pipes with the electrolyte, sealing the positive and negative electrode cavities, carrying out standing for some time, starting a stirrer and orderly carrying out activation, formation and capacity grading. The pole plate separated lithium ion battery utilizes a silicon negative electrode, is convenient for dismounting and maintenance and improves energy density and safety.
Description
Technical field
The present invention relates to a kind of lithium ion battery, particularly relate to one and be easily repaired, improve energy density and peace
Pole plate separate type lithium ion battery of full performance and preparation method thereof.
Background technology
With traditional accumulator comparatively, lithium ion battery is by its high energy density, relatively long circulating
Life-span, all many advantages such as quick charge and electric discharge and constantly reduce manufacture cost,
The great development prospect of each application, has become as the first-selected battery of electric automobile in ten to two ten years from now on.
Nowadays the technical optimization upgrading of lithium ion battery has become as scientific research institution and the important class of enterprise's highest attention
Topic.
Currently, new-energy automobile industry has been classified as the emerging strategic that modern later greatly develops period and has produced by China
One of industry, this just opens the most wide market space for lithium ion battery.Meanwhile, at electric bicycle
Field, space industry, military field, lithium ion battery also has extraordinary development prospect.Along with lithium from
The further development of sub-battery technology, the performance that lithium ion battery is had will necessarily be the highest, its application
Being worth also can be increasing, and continues development towards trend such as high-energy-density, high power, maximizations.
Inside lithium battery industry, ripe and widely used battery material has a variety of at present, but some novel-sections
Material due to production technology and technique, temporarily cannot commercial applications, as manganese-based anode material, silicon bear
Pole material, novel electrolyte etc..The particularly silicium cathode material of high-energy-density, is constantly subjected to lithium electricity industry
Favor.But caused by silicon materials self character, presently, there are a lot of problem, be difficult to business always
Industryization is applied, and in particular how solves or tackles the expansion issues during silicon uses and annoying whole always
Lithium electricity industry.
The safety of lithium ion battery is also the particularly important standard judging lithium electricity quality, but due to himself
Work characteristics, conventional lithium ion battery we cannot ensure at all its use during be perfectly safe.
Improve the particularly important research topic that security performance is also lithium ion battery the most further.
It addition, battery carry out from completing use until its end-of-life whole during, it is impossible to right
Battery carries out capacity boost etc. and repairs operation, and final waste battery can only carry out portion of material recycling.
It is true that battery use during may only because the decline of a kind of material or technologic factor and cause
Deterioration of cell properties.During using such as negative material, special capacity fade is too fast, and positive pole is good；Electrolyte
Amount not enough, later stage serious lean solution etc..The variation of these performances in fact, only need to by change negative plate or
Battery just can be repaired by supplement electrolyte.But traditional lithium battery structure strict seal, pole piece asks sky
Between narrow and small, positive and negative plate must separate with isolating membrane, cannot realize repairing operation at all, therefore finally can only
Entirety is scrapped.
Summary of the invention
Present invention mainly solves original lithium battery structure strict seal, positive and negative plate must separate with isolating membrane,
Battery is caused to cannot be carried out during using repairing safeguarding, the technical problem that can only overall scrap；One is provided
Pole plate separate type lithium ion battery and preparation method thereof, positive and negative plate is completely independent, can just avoid completely,
The contact of cathode pole piece, raising security performance, and easy accessibility, battery can be easily during using
Carry out repairing and safeguard, entirety need not scrap, reach material-saving and subtract the purpose of consumption.
The present invention solves in original lithium battery structure narrow space between pole piece simultaneously, is not suitable for using use process
The silicium cathode material that middle meeting expands, thus affect the technical problem of the energy density of battery；One is provided
Pole plate separate type lithium ion battery and preparation method thereof, positive and negative plate is completely independent setting, has enough peaces
Dress space, is entirely capable of accommodating silicium cathode and expands the thickness change brought, improve battery energy density.
It is a still further object of the present invention to provide a kind of pole plate separate type lithium ion battery and preparation method thereof, logical
Cross agitator, accelerate circulating of electrolyte, effectively eliminate the concentration polarization in battery charge and discharge process,
Improve battery performance.
The above-mentioned technical problem of the present invention is mainly addressed by following technical proposals: the pole of the present invention
Plate separate type lithium ion battery, including positive pole cavity and negative pole cavity, connects between positive pole cavity and negative pole cavity
Being connected with plural pipeline, filling in positive pole cavity, negative pole cavity and pipeline has electrolyte, positive pole cavity,
Negative pole cavity is respectively equipped with plus plate current-collecting body and negative current collector, plus plate current-collecting body and being located on positive pole cavity
Positive Poles be connected, negative current collector is connected with the negative pole pole being located on negative pole cavity.Traditional lithium from
In sub-battery, positive pole, negative pole and barrier film are in close contact, and use the mode of winding or lamination to combine
Together, it is then injected into electrolyte to seal again.And in the present invention, anode portion, cathode portion are the most solely
On the spot it is located in positive pole cavity, negative pole cavity, completely separable isolation, and removes barrier film completely.Anode portion
It is in cathode portion in two different spaces, therefore can avoid the contact of positive and negative electrode completely, improve peace
Full performance.Simultaneously as positive and negative electrode is provided separately, therefore easy accessibility, can be replaced respectively, repair
Safeguard.During using such as negative material, special capacity fade is too fast, and positive pole is good, the most only needs anticathode
It is replaced, repairs maintenance, need not entirety scrap, reach material-saving and subtract the purpose of consumption.And due to positive and negative
Pole part is completely independent setting, each with enough installing spaces, therefore when negative current collector uses silicium cathode
During pole plate, negative pole cavity is entirely capable of accommodating silicium cathode and expands the thickness change brought so that high-energy-density
The commercial applications of silicium cathode is achieved, thus is effectively improved battery energy density.When using two pipelines
Time, two pipelines are connected to top and the bottom of positive and negative electrode cavity, constitute " mouth " font loop,
Electrolyte is distributed in positive and negative electrode cavity and pipeline, and in battery charge and discharge process, electrolyte is at " mouth "
Font circulates in loop.The quantity of pipeline and length can require to be adjusted according to the design of battery,
The quantity of general pipeline is two, and in order to improve the performances such as the higher multiplying power of battery, the quantity of pipeline can increase
It is added to more.The lithium-ion battery electrolytes with high electrical conductivity chosen by electrolyte.
As preferably, described positive pole cavity, negative pole cavity are respectively provided with the steam vent can opened and block.
Sealing lid can be set on steam vent, steam vent may also set up plug, in order to the opening or blocking of steam vent.
The gas that battery produces during using can be discharged to outside battery by steam vent, also can be mended by steam vent
Fill or change electrolyte, it is achieved the reparation to battery is safeguarded.
As preferably, in described positive pole cavity, negative pole cavity, it is respectively provided with agitator, stirring in positive pole cavity
Mixing device towards described anode collection surface, the agitator in negative pole cavity is towards described negative current collector
Surface, the drive link of described agitator is exposed to outside positive and negative electrode cavity.The drive link of agitator and being positioned at
The driving equipment of outside batteries is connected, and drives power can use electric power or magnetically-actuated, it is possible to use electric power
With magnetic force combination drive.As used motor to drive agitator, the rotating shaft of motor is connected with the drive link of agitator,
Start motor, drive agitator to rotate, accelerate circulating of electrolyte, effectively eliminate battery charging and discharging mistake
Concentration polarization in journey, it is ensured that the Li that deintercalation is got off from positive and negative electrode collector+Lithium electrode can be rapidly separated
The electric double layer region on surface enters in electrolyte, thus improves battery performance.
As preferably, described pipeline is provided with several agitators, the agitator edge being located in same pipeline
The length direction of pipeline is distributed the most separately, and the drive link of described agitator is exposed to outside described pipeline.
According to the length of pipeline, the agitator of varying number can be set.The drive link of agitator and be positioned at outside batteries
Driving equipment be connected, drive power can use electric power or magnetically-actuated, it is possible to use electric power and magnetic force to mix
Close and drive.As used motor to drive agitator, the rotating shaft of motor is connected with the drive link of agitator, starts electricity
Machine, drives agitator to rotate, accelerates circulating of electrolyte.The running speed of agitator can be according to reality
Border uses requirement to be adjusted.During if desired for big multiplying power electric current, accelerate mixing speed；If required electric current times
Rate is less, then mixing speed can be the most slack-off.In order to prevent being corroded by electrolyte solvent, agitator
Material selection is difficult to the plastic material being corroded.
As preferably, described positive pole cavity, negative pole cavity are equipped with cover plate, described Positive Poles setting-in
On the cover plate of positive pole cavity, connect between described plus plate current-collecting body and Positive Poles and have positive pole ear, just
Anode sizing agent layer it is coated with on the collector of pole；Described negative pole pole is inlaid on the cover plate of negative pole cavity, institute
Connect between negative current collector and the negative pole pole stated and have negative lug, negative current collector is coated with negative pole slurry
The bed of material.Whole battery disassembly and assembly is convenient, as required, and replaceable positive and negative electrode collector, it is possible to just changing,
Negative pole pole, repairs easy to maintenance.In the technical program, positive and negative electrode pole piece still uses existing coating skill
Positive and negative electrode powder is coated in conductive current collector by art.Positive and negative electrode pole-piece area size and coating powder
Thickness can be adjusted according to actual operation requirements and design.For ensureing higher energy density, can adopt
With multiple anode pole pieces be connected in parallel composition plus plate current-collecting body, to use multiple cathode pole piece to be connected in parallel composition negative
The structure of pole collector, only need to strengthen positive and negative electrode cavity volume, the most also can add agitator, right
Accurate each pole piece.
As preferably, described plus plate current-collecting body, negative current collector all it is covered with grooved hole, plus plate current-collecting body,
The top of negative current collector is equipped with and is left white district, and plus plate current-collecting body is left white district and described positive pole ear
One end is connected, and the district that is left white on negative current collector is connected with one end of described negative lug, plus plate current-collecting body
Slotted eye in be filled with anode sizing agent, the slotted eye of negative current collector is filled with cathode size.When positive pole is starched
When material is coated on plus plate current-collecting body constitute anode sizing agent layer, anode sizing agent is also filled into plus plate current-collecting body simultaneously
On slotted eye in；When cathode size is coated on negative current collector constitute cathode size layer, cathode size
Also it is filled in the slotted eye on negative current collector simultaneously.Guarantee that the positive and negative electrode collector after coating has well
Apparent condition, improves collector and the bonding dynamics of slurry so that through long-time discharge and recharge, powder also will not
Come off.The mechanical strength of positive and negative collector is high, will not deform upon during use；There is good electronics
Transmission performance, it is possible to ensure the electron transfer rate in the charge and discharge process of certain multiplying power.
As preferably, constitute the shell employing high compactness of positive and negative electrode cavity and pipeline and the material that density is relatively low
Material is made, and this material has the following characteristics that strict poisture-penetrability, under certain humidity environment, it is possible to protect
The card impermeable housing of moisture；Extremely strong anticorrosive and antioxygenic property, it is possible to adapt to electrolyte acidity and
Organic solvent environment, not by electrolytic corrosion and dissolving, under outside adverse circumstances, as under intensive ultraviolet not
Easily aged deterioration, nonflammable under higher temperature；There is certain heat-conductive characteristic, the heat that inside battery produces
Amount outwards can be transmitted by shell；There is certain intensity, it is possible to bear certain portraitlandscape stress,
Such as cell internal pressure, extraneous weight shock etc., at high temperature, low temperature lower house indeformable, the most brittle etc..
The manufacture method of the pole plate separate type lithium ion battery of the present invention, comprises the following steps:
1. the anode sizing agent configured is coated on anode plate, rolls after drying, carry out the most again
Plus plate current-collecting body described in baking composition；The cathode size configured is coated in negative plates, after drying
Roll, carry out the negative current collector described in baking composition the most again；
2. plus plate current-collecting body is put in described positive pole cavity, negative current collector is put into described negative pole chamber
In body；
3. in positive pole cavity and negative pole cavity, inject described electrolyte, make filling in described pipeline have electricity
Solve liquid, then positive pole cavity and negative pole cavity are sealed；
4. a period of time is stood, after plus plate current-collecting body described in liquid complete wetting to be electrolysed and negative current collector,
Again described lithium ion battery activated successively, be melted into and partial volume.
Anode portion of the present invention is in cathode portion in two different spaces, therefore can just avoid completely,
The contact of negative pole, improves security performance.Owing to positive and negative electrode is provided separately, therefore easy accessibility, can enter respectively
Row is changed, is repaired and safeguard, entirety need not scrap, reaches material-saving and subtract the purpose of consumption.And due to positive and negative electrode
Part is completely independent setting, each with enough installing spaces, therefore when negative current collector uses silicium cathode pole
During plate, negative pole cavity is entirely capable of accommodating silicium cathode and expands the thickness change brought so that the silicon of high-energy-density
The commercial applications of negative pole is achieved, thus is effectively improved battery energy density.
As preferably, the positive pole cavity of described lithium ion battery, negative pole cavity are respectively provided with and can open and seal
Stifled steam vent；3. described step is: noted in positive pole cavity and negative pole cavity by described steam vent
Enter described electrolyte, make filling in described pipeline have electrolyte, then by positive pole cavity and negative pole cavity
Seal.When needing, steam vent can be opened easily, and the gas making battery produce during using passes through
Steam vent is discharged to outside battery, it is possible to is supplemented by steam vent or changes electrolyte, it is achieved the reparation to battery
Safeguard.
As preferably, described positive pole cavity, negative pole cavity and described pipeline is respectively provided with agitator, stirs
The driving means mixing device and be positioned at outside lithium ion battery is connected；2. described step is: at described positive pole
Cavity, negative pole cavity and pipeline install described agitator, plus plate current-collecting body is put into described positive pole
In cavity, negative current collector is put in described negative pole cavity；4. described step is: when standing one section
Between, after plus plate current-collecting body described in liquid complete wetting to be electrolysed and negative current collector, open driving means, open
Dynamic described agitator, more described lithium ion battery is activated successively, is melted into and partial volume.
Agitator works, and accelerates circulating of electrolyte, effectively eliminates the concentration difference in battery charge and discharge process
Polarization, it is ensured that the Li that deintercalation is got off from positive and negative electrode collector+Double electricity of lithium electrode surface can be rapidly separated
Layer region enters in electrolyte, thus improves battery performance.The running speed of agitator can be according to reality
Use requirement is adjusted.During if desired for big multiplying power electric current, accelerate mixing speed；If required current ratio
Less, then mixing speed can be the most slack-off.
The invention has the beneficial effects as follows: positive and negative electrode is separately positioned in different cavity, can avoid positive and negative completely
The contact of pole pole piece, improves security performance, and easy accessibility, and positive and negative electrode can be independent as two
Unit is replaced, and electrolyte also can carry out fluid infusion and replacing, and the reparation that can carry out battery easily is safeguarded,
Entirety need not scrap, reach material-saving and subtract the purpose of consumption.Negative pole cavity has enough installing spaces, is entirely capable of holding
Silicium cathode of receiving expands the thickness change brought so that the popularization and application of silicium cathode is achieved, and improves battery energy
Metric density.The setting of agitator, accelerates circulating of electrolyte, effectively eliminates battery charge and discharge process
In concentration polarization, improve battery performance.The present invention is easy to make, and technique is simple, as required can be flexible
Changeable.The lithium ion battery of the present invention has higher energy density, more preferable combination property and high peace
Full performance.
Accompanying drawing explanation
Fig. 1 is a kind of sectional structure schematic diagram of pole plate separate type lithium ion battery of the present invention.
Fig. 2 is the one main TV structure schematic diagram of plus plate current-collecting body in pole plate separate type lithium ion battery of the present invention.
Fig. 3 is a kind of perspective view of agitator in pole plate separate type lithium ion battery of the present invention.
Fig. 4 is a kind of perspective view of pole plate separate type lithium ion battery cover plate of the present invention.
1. positive pole cavity, 2. negative pole cavity, 3. pipeline, 4. plus plate current-collecting body, 5. negative current collector in figure, 6.
Positive Poles, 7. negative pole pole, 8. steam vent, 9. agitator, 10. cover plate, 11. positive pole ears, 12. just
Pole pulp layer, 13. negative lug, 14. cathode size layers, 15. slotted eyes, 16. are left white district, 17. electrolyte,
91. impellers, 92. power transmission shafts.
Detailed description of the invention
Below by embodiment, and combine accompanying drawing, technical scheme is described in further detail.
Embodiment: the pole plate separate type lithium ion battery of the present embodiment, as it is shown in figure 1, include in " returning "
The shell of font structure, the left side of shell is positive pole cavity 1, and the right side of shell is negative pole cavity 2, is connected to
Between top and the bottom of positive and negative electrode cavity is two pipelines 3, and pipeline connects with positive and negative electrode cavity, just
The cover plate 10 being tightly connected, as shown in Figure 4, cover plate 10 are all stamped in pole cavity 1, the top of negative pole cavity 2
Being backed with a boss, in boss plug to positive and negative electrode cavity, cover plate is tightly connected with positive and negative electrode cavity again,
Having steam vent 8 on cover plate 10, having plug, steam vent in steam vent 8 is the passage of a UNICOM, when opening,
Being used for discharging the gas that inside battery produces, electrolyte can also be replaced by steam vent or fluid infusion simultaneously.
Positive Poles 6 is inlaid on the cover plate 10 of positive pole cavity 1, and negative pole pole 7 is inlaid in the lid of negative pole cavity 2
On plate 10, in positive pole cavity 1, negative pole cavity 2 and pipeline 3, filling has electrolyte 17.Positive pole cavity 1,
Negative pole cavity 2 is separately installed with plus plate current-collecting body 4 and negative current collector 5, as in figure 2 it is shown, anode collection
Body 4, negative current collector 5 surface have a large amount of equally distributed small slotted eye 15, plus plate current-collecting body 4, negative pole
The top of collector 5 is all left white district 16, and one end of positive pole ear 11 and plus plate current-collecting body 4 be left white district
Being weldingly connected, the other end and the Positive Poles 6 of positive pole ear 11 are weldingly connected, one end of negative lug 13
Being weldingly connected with the district that is left white on negative current collector 5, the other end and the negative pole pole 7 of negative lug 13 weld
It is connected.Being coated with anode sizing agent layer 12 on plus plate current-collecting body 4, during coating, anode sizing agent is well embedded in
In the slotted eye 15 of plus plate current-collecting body 4；Cathode size layer 14 it is coated with on negative current collector 5, during coating, negative
Pole slurry is well embedded in the slotted eye 15 of negative current collector 5.Thus increase contact area, improve electronics
Conduct electricity from.Positive pole cavity 1, negative pole cavity 2 and pipeline are mounted on agitator 9, as it is shown on figure 3, stir
Mixing impeller 91 and drive link 92 that device 9 includes being connected, impeller is made up of the tingia of radian by three, positive pole chamber
The impeller of the agitator 9 in body 1 towards plus plate current-collecting body 4 surface, the agitator 9 in negative pole cavity 2
Impeller, towards negative current collector 5 surface, is positioned at the length along pipeline 3 of the multiple agitators 9 in same pipeline 3
Degree direction is distributed the most separately, and the drive link 92 of agitator 9 is exposed independent from outside shell, respectively and be positioned at lithium
Motor outside ion battery is connected, and motor provides stirring power.
The manufacture method of above-mentioned pole plate separate type lithium ion battery, comprises the following steps:
1. plus plate current-collecting body 4 and negative current collector 5 are made.
Plus plate current-collecting body is thickness 1mm, the treated aluminium sheet of width 200mm, length 600mm, at aluminum
The pore-creating of plate surface, aperture is about 0.2mm, makes surface of aluminum plate be evenly equipped with substantial amounts of slotted eye 15.Anode sizing agent makes
With NCA (nickel cobalt lithium aluminate) material of SUMITOMO CHEMICAL as major ingredient, conductive additive is SP (superconduction white carbon black)
With KS-15 (crystalline flake graphite), binding agent is the PVDF900 (Kynoar) of France's Acker agate, each material
Ratio be NCA: SP: KS-15: PVDF=95: 1.5: 1: 2.5, solvent is NMP (N-crassitude
Ketone), it is homogenized, final prepared viscosity is 7000mPa.S, solid content is the anode sizing agent of 65%.Will just
Pole slurry is homogeneously applied to surface of aluminum plate in dry environments, toasts the most at different temperatures, removes
Remove NMP, then roll under chaser, make thickness reach the technological requirement of the present embodiment, the most right
Pole piece toasts further and removes unnecessary moisture.
In the present embodiment, the surface density of positive mix is 500g/m2, compacted density is 3.6g/m3, final water
Sub-control system at 300ppm once, is fabricated to plus plate current-collecting body 4.
Negative current collector is thickness 1mm, the treated copper coin of width 200mm, length 600mm, copper coin
Surface pore-creating, aperture is 0.1mm, makes copper coin surface be evenly equipped with substantial amounts of slotted eye 15.Cathode size uses day
The Si/C silicon-carbon cathode material that this certain company produces, this material gram volume is up to 1000mAh/g, and conductive agent is SP
(superconduction white carbon black), binding agent is SBR (styrene-butadiene latex) and CMC (sodium carboxymethyl cellulose), each material
Ratio is Si/C: SP: SBR: CMC=94: 1.5: 3: 1.5, and solvent is deionized water, is homogenized,
The most prepared viscosity is 2000mPa.S, solid content is the cathode size of 45%.Cathode size is homogeneously applied to
Copper coin surface, toasts the most at different temperatures, removes water, then rolls under chaser,
Making thickness reach the technological requirement of the present embodiment, and then baking further to pole piece removes unnecessary moisture.
In the present embodiment, the surface density of negative pole powder is 100g/m2, compacted density is 1.4g/m3, final water
Sub-control system at 300ppm once, is fabricated to negative current collector 5.
2. in positive pole cavity 1, negative pole cavity 2 and pipeline 3, agitator 9 is installed, respectively at anode collection
Upper aluminum matter positive pole ear 11 and copper negative lug 13 are welded by body 4, the district 16 that is left white of negative current collector 5,
Two cover plates 10 have been respectively mounted Positive Poles 6 and negative pole pole 7, the other end of positive pole ear 11 and
Positive Poles below cover plate is welded mutually, and the other end of negative lug 13 welds mutually with the negative pole pole below cover plate
Connect, plus plate current-collecting body 4 put in positive pole cavity 1, negative current collector 5 is put in negative pole cavity 2,
Cover plate is built in sealing, and surrounding fluid sealant carries out encapsulation process；
3. in positive pole cavity 1 and negative pole cavity 2, electrolyte 17 is injected by steam vent 8, until electrolyte
It is totally submerged positive and negative electrode collector, and makes all fillings in upper and lower pipeline 3 have electrolyte 17, the present embodiment
In electrolyte use the mixing lithium salt electrolyte that mixes mutually with inorganic lithium salt of organic lithium salt, solvent is that speciality is low
The organic solvent of viscosity, this electrolyte has good ionic conductivity, then fills in plug in steam vent 8,
Carry out encapsulation process；
4. a period of time is stood, after liquid 17 complete wetting plus plate current-collecting body 4 to be electrolysed and negative current collector 5,
Open motor, start agitator 9, then lithium ion battery is activated successively, is melted into and partial volume, positive and negative
Pole connects charger and is charged.
The pole plate separate type lithium ion battery that the present embodiment makes, cathode pole piece is in the negative of the space that is flush with money
In the cavity of pole, it is fully able to adapt to the expansion during silicon-carbon cathode uses, simultaneously because positive and negative electrode pole piece
Completely separable, follow-up can align well, cathode pole piece is replaced.Steam vent is left on cover plate, can
To discharge the gas that inside battery produces at any time, it is also convenient for electrolyte being replaced and fluid infusion, has the highest
Motility and practicality, it is convenient to battery is carried out the later stage reparation operation.The setting of agitator, adds
Fast circulating of electrolyte, effectively eliminates the concentration polarization in battery charge and discharge process.By to according to
The lithium ion battery that in the present embodiment, method carries out making detects, and result shows, the lithium of the present embodiment from
Every chemical property of sub-battery is better than common batteries, and there is not any safety problem.
The pole plate separate type lithium ion battery of the present invention is compared with traditional lithium ion battery, and various aspects of performance is equal
It is greatly improved.The mass energy density of pole plate separate type lithium ion battery is more than 300Wh/Kg, body
Long-pending energy density is more than 800 times more than 700Wh/L, cycle-index.Pole plate separate type lithium-ion electric of the present invention
Pond cost performance is the highest, before lithium battery chemical property requires that the highest lithium electricity market has well
Scape.
Claims (9)
1. a pole plate separate type lithium ion battery, it is characterised in that include positive pole cavity (1) and negative pole chamber
Body (2), is communicated with plural pipeline (3), just between positive pole cavity (1) and negative pole cavity (2)
Pole cavity (1), negative pole cavity (2) and pipeline (3) fill and has electrolyte (17), positive pole cavity (1),
Negative pole cavity (2) is respectively equipped with plus plate current-collecting body (4) and negative current collector (5), plus plate current-collecting body (4)
It is connected with the Positive Poles (6) being located on positive pole cavity (1), negative current collector (5) and be located at negative pole chamber
Negative pole pole (7) on body (2) is connected.
Pole plate separate type lithium ion battery the most according to claim 1, it is characterised in that described positive pole
The steam vent (8) can opened and block it is respectively provided with on cavity (1), negative pole cavity (2).
Pole plate separate type lithium ion battery the most according to claim 1, it is characterised in that described positive pole
Agitator (9) it is respectively provided with, the agitator (9) in positive pole cavity (1) in cavity (1), negative pole cavity (2)
Towards described plus plate current-collecting body (4) surface, the agitator (9) in negative pole cavity (2) is towards described
Negative current collector (5) surface, the drive link (92) of described agitator (9) is exposed to positive and negative electrode chamber
Body (1,2) is outward.
4. according to the pole plate separate type lithium ion battery described in claim 1 or 2 or 3, it is characterised in that institute
The pipeline (3) stated is provided with several agitators (9), the agitator (9) being located in same pipeline (3)
Length direction along pipeline (3) is distributed the most separately, the drive link (92) of described agitator (9)
It is exposed to described pipeline (3) outward.
5. according to the pole plate separate type lithium ion battery described in claim 1 or 2 or 3, it is characterised in that institute
Positive pole cavity (1), the negative pole cavity (2) stated are equipped with cover plate (10), and described Positive Poles (6) is embedding
It is contained on the cover plate (10) of positive pole cavity (1), described plus plate current-collecting body (4) and Positive Poles (6)
Between connect have positive pole ear (11), plus plate current-collecting body (4) is coated with anode sizing agent layer (12)；Described
Negative pole pole (7) be inlaid on the cover plate (10) of negative pole cavity (2), described negative current collector (5)
With connection has negative lug (13) between negative pole pole (7), negative current collector (5) is coated with negative pole slurry
The bed of material (14).
Pole plate separate type lithium ion battery the most according to claim 5, it is characterised in that described positive pole
Grooved hole (15), plus plate current-collecting body (4), negative pole all it is covered with on collector (4), negative current collector (5)
The top of collector (5) is equipped with and is left white district (16), described positive pole ear (11) and plus plate current-collecting body
(4) district (16) that is left white on is connected, in described negative lug (13) and negative current collector (5)
It is left white district (16) to be connected, the slotted eye (15) of plus plate current-collecting body (4) is filled with anode sizing agent, negative pole collection
The slotted eye (15) of fluid (5) is filled with cathode size.
7. a manufacture method for pole plate separate type lithium ion battery as claimed in claim 1, its feature exists
In comprising the following steps:
1. the anode sizing agent configured is coated on anode plate, rolls after drying, carry out the most again
Plus plate current-collecting body (4) described in baking composition；The cathode size configured is coated in negative plates, dries
Roll after Gan, carry out the negative current collector (5) described in baking composition the most again；
2. plus plate current-collecting body (4) is put in described positive pole cavity (1), negative current collector (5) is put
Enter in described negative pole cavity (2)；
3. the electrolyte (17) described in injecting in positive pole cavity (1) and negative pole cavity (2), makes described
In pipeline (3), filling has electrolyte (17), then positive pole cavity (1) and negative pole cavity (2) is carried out
Seal；
4. a period of time is stood, the plus plate current-collecting body (4) described in liquid to be electrolysed (17) complete wetting and negative pole
After collector (5), more described lithium ion battery is activated successively, is melted into and partial volume.
The manufacture method of pole plate separate type lithium ion battery the most according to claim 7, it is characterised in that
It is respectively provided with, on the positive pole cavity (1) of described lithium ion battery, negative pole cavity (2), the row that can open and block
Pore (8)；3. described step is: by described steam vent (8) to positive pole cavity (1) and negative pole
Electrolyte (17) described in injecting in cavity (2), makes filling in described pipeline (3) have electrolyte (17),
Then positive pole cavity (1) and negative pole cavity (2) are sealed.
9. according to the manufacture method of the pole plate separate type lithium ion battery described in claim 7 or 8, its feature
It is in described positive pole cavity (1), negative pole cavity (2) and described pipeline (3) to be respectively provided with agitator
(9), agitator (9) is connected with the driving means being positioned at outside lithium ion battery；2. described step is:
Described agitator (9) is installed in described positive pole cavity (1), negative pole cavity (2) and pipeline (3),
Plus plate current-collecting body (4) is put in described positive pole cavity (1), negative current collector (5) is put into described
Negative pole cavity (2) in；4. described step is: standing a period of time, liquid to be electrolysed (17) soaks completely
After plus plate current-collecting body (4) described in profit and negative current collector (5), open driving means, described in startup
Agitator (9), more described lithium ion battery is activated successively, is melted into and partial volume.
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| CN201610075800.9A CN105845966A (en) | 2016-02-03 | 2016-02-03 | Pole plate separated lithium ion battery and manufacturing method thereof |
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| CN201610075800.9A CN105845966A (en) | 2016-02-03 | 2016-02-03 | Pole plate separated lithium ion battery and manufacturing method thereof |
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Application publication date: 20160810 |