CN107039636A - Anode pole piece preparation method, anode pole piece, preparation method of lithium ion battery - Google Patents
Anode pole piece preparation method, anode pole piece, preparation method of lithium ion battery Download PDFInfo
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- CN107039636A CN107039636A CN201710203405.9A CN201710203405A CN107039636A CN 107039636 A CN107039636 A CN 107039636A CN 201710203405 A CN201710203405 A CN 201710203405A CN 107039636 A CN107039636 A CN 107039636A
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1397—Processes of manufacture of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
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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
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/136—Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/661—Metal or alloys, e.g. alloy coatings
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
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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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Abstract
The present invention discloses a kind of anode pole piece preparation method, anode pole piece, preparation method of lithium ion battery.Pole piece preparation method includes：It is 100~200 in mass ratio：1~30, aqueous solvent and the first binding agent are mixed, the first mixed liquor is obtained；It is 10~30 in mass ratio：90~96：101~230, the silane coupler of epoxy radicals, the first conductive agent and the first mixed liquor are mixed, the second mixed liquor is obtained；Second mixed liquor is milled and obtains the first slurry, aluminium foil surface is applied to；The baking of first slurry obtains carbon-coating and is formed at the surface of aluminium foil；It is 90~98 in mass ratio：1~10：1~30, electrode active material, the second conductive agent and the second binding agent are mixed, the 3rd mixed liquor is obtained；3rd mixed liquor is milled and obtains the second slurry, carbon-coating surface is applied to；The baking of second slurry obtains source/drain and is formed at the surface of carbon-coating.So as to improve the performance of electrokinetic cell, while reducing cost, green, the market demand of safety are met, it is ensured that excellent electric conductivity.
Description
Technical field
It is more particularly to a kind of to improve the anode pole piece preparation side of electrokinetic cell performance the present invention relates to cell art
Method, anode pole piece, preparation method of lithium ion battery.
Background technology
It is the principles and policies that the Chinese government adheres to for a long time, lithium electricity to build resource-conserving, environmentally friendly harmonious society
Pond electric car meets national development policy with its advantage that easy to use, complete vehicle weight is light, safety is secure, is that a kind of embody is gone
The mainstream product of industry technological progress.
The main difficulty that current power battery faces is：Discharge power requires high, and charge-discharge performance rate request is fast, circulation
Life requirements is long.The electric conductivity of LFP materials in itself is poor, therefore makes the sub-micron even particle of Nano grade mostly, to increase
Plus electric conductivity, but what LFP particles were directly contacted or had any problem with aluminium foil, it is therefore necessary to mended by conductive coating
Repay.Having beneficial to LFP particles for coating is directly bonded with aluminium foil, and surface is carried out to battery conductive base material using functional coating
Processing is a breakthrough technological innovation, carbon coated aluminum foil be exactly by scattered conductive nano graphite and carbon bag particle, it is uniform,
It is coated in fine and smoothly on aluminium foil.It can provide splendid static conductive performance, the micro-current of active material be collected, so as to big
Contact resistance between amplitude reduction positive electrode and collector, and adhesive ability between the two can be improved.Carbon coated aluminum foil pair
Collector plays anticorrosion and anti-oxidation effect, improves stability, security and the reliability of battery, improves the circulation of battery
Performance, while the dynamic internal resistance of battery can be reduced, improves battery with two side terminals and combo.Coating aluminium foil is divided into water system and oil
System, to meet green, the market demand of safety, aqueous carbon-coated aluminum foils are by emphasis and focus as research.
The content of the invention
The purpose of the present invention is to overcome weak point of the prior art to improve the positive pole of electrokinetic cell performance there is provided a kind of
The anode pole piece preparation method of pole piece, anode pole piece, preparation method of lithium ion battery, improve the performance of electrokinetic cell, drop simultaneously
Low cost, meets green, the market demand of safety, it is ensured that excellent electric conductivity.
The purpose of the present invention is achieved through the following technical solutions：
A kind of anode pole piece preparation method, the anode pole piece includes aluminium foil, the carbon-coating for being formed at the aluminium foil surface, shape
The source/drain on carbon-coating surface described in Cheng Yu；
The preparation method of the anode pole piece comprises the following steps：
There is provided aluminium foil by step S110；
Step S120, is in mass ratio 100~200：1~30, after aqueous solvent and the first binding agent are well mixed, obtain
To the first mixed liquor；
Step S130, is in mass ratio 10~30：90~96：101~230, the silane coupler of epoxy radicals, first are led
After electric agent and the first mixed liquor are well mixed, the second mixed liquor is obtained；
Step S140, obtains the first slurry, and be coated on aluminium foil surface by the second mixed liquor by milling；
Step S150, the aluminium foil for being coated with the first slurry is toasted, and the baking of the first slurry obtains carbon-coating and is formed at
The surface of the aluminium foil；
Step S160, is in mass ratio 90~98：1~10：1~30, by electrode active material, the second conductive agent and second
After binding agent is well mixed, the 3rd mixed liquor is obtained；
Step S170, obtains the second slurry, and be coated on the carbon-coating surface by the 3rd mixed liquor by milling；
Step S180, the aluminium foil that the carbon-coating surface is coated with into the second slurry is toasted, and the baking of the second slurry is obtained
Source/drain and the surface for being formed at the carbon-coating.
In one of the embodiments, first binding agent be allyl resin, aqueous polyurethane, aqueous epoxy resins,
The one or more of nanometer water polyester.
In one of the embodiments, first conductive agent is electrically conductive graphite, conductive black, CNT, graphene
One or more.
In one of the embodiments, the thickness of the aluminium foil is 16~20 μm.
Obtained by a kind of anode pole piece, the preparation method by above-mentioned anode pole piece, including：Aluminium foil, carbon-coating, electrode active
Property layer,
Carbon-coating coating area is formed in the middle of the aluminium foil surface, the both sides of the aluminium foil surface form aluminium foil and are left white respectively
Area, the carbon-coating is coated on the carbon-coating coating area；
Active material coating area is formed in the middle of the carbon-coating surface, the both sides on the carbon-coating surface form carbon-coating and stayed respectively
White area, the source/drain is coated on the active material coating area.
A kind of preparation method of lithium ion battery, comprises the following steps：
Step S210 is there is provided cathode pole piece, electrolyte, positive pole ear, negative lug, barrier film, while providing claim 5
Described anode pole piece；
Step S220, positive pole ear and negative lug are respectively welded on anode pole piece and cathode pole piece；
Step S230, barrier film is positioned between anode pole piece and cathode pole piece；
Step S240, is wound to anode pole piece, cathode pole piece and barrier film；
Step S250, vacuum bakeout is carried out by the anode pole piece after winding, cathode pole piece and barrier film；
Step S260, injects electrolyte, obtains lithium ion battery semi-finished product, carries out high temperature static；
Lithium ion battery semi-finished product are carried out negative pressure chemical conversion by step S270, and high temperature is static；
Lithium ion battery semi-finished product are carried out vacuum suction, concora crush and weldering sealing nail, obtain finished product lithium ion by step S280
Battery.
The current major requirement to electrokinetic cell has：Discharge power requires high, and charge-discharge performance speed is fast, and cycle life will
Ask long.The electric conductivity of LFP materials in itself is poor, therefore, and the sub-micron even particle of Nano grade are made mostly to increase conduction
Property.But what LFP particles were directly contacted or had any problem with aluminium foil, it is therefore necessary to compensated, led simultaneously by conductive coating
The appearance of electrocoat is also beneficial to LFP particles and directly bonded with aluminium foil.
In the preparation method of such a anode pole piece, the first slurry uniformly, fine and smoothly is coated in aluminium foil surface, it can be carried
For splendid static conductive performance, collect the micro-current of active material, so as to be greatly lowered positive electrode and afflux it
Between contact resistance, and adhesive ability between the two can be improved.Carbon coated aluminum foil plays anticorrosion to collector and oxygen is turned into
With stability, security and the reliability of raising battery improve the cycle performance of battery, while can reduce in the dynamic of battery
Resistance, improves battery with two side terminals and combo.
Brief description of the drawings
Fig. 1 is the cross-sectional structure figure of the anode pole piece of one embodiment of the invention；
Fig. 2 is the plan of the aluminium foil of the anode pole piece shown in Fig. 1；
Fig. 3 is the plan of the carbon-coating of the anode pole piece shown in Fig. 1；
Fig. 4 carries out the data comparison of cycle performance test for the lithium ion battery of the present invention with traditional lithium ion battery
Figure；
Fig. 5 is lithium ion battery of the invention and the internal resistance histogram of traditional lithium ion battery.
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give the better embodiment of the present invention.But, the present invention can be realized in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose for providing these embodiments is to make to understand more the disclosure
Plus it is thorough comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or can also have element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " level ", " left side ",
For illustrative purposes only, it is unique embodiment to be not offered as " right side " and similar statement.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " including one or more
The arbitrary and all combination of related Listed Items.
The preparation method of the anode pole piece of one embodiment, wherein, the anode pole piece includes aluminium foil, is formed at the aluminium
The carbon-coating on paper tinsel surface, the source/drain for being formed at the carbon-coating surface；
The anode pole piece preparation method comprises the following steps：
There is provided aluminium foil by step S110；
Step S120, is in mass ratio 100~200：1~30, by aqueous solvent and binding agent it is well mixed after, obtain the
One mixed liquor；
Step S130, is in mass ratio 10~30：90~96：101~230, by the silane coupler of epoxy radicals, conductive agent
After being well mixed with the first mixed liquor, the second mixed liquor is obtained；
Step S140, obtains the first slurry, and be coated on aluminium foil surface by the second mixed liquor by milling；
Step S150, the aluminium foil for being coated with the first slurry is toasted, and the baking of the first slurry obtains carbon-coating and is formed at
The surface of the aluminium foil；
Step S160, is in mass ratio 90~98：1~10：1~30, electrode active material, conductive agent and binding agent are mixed
After closing uniformly, the 3rd mixed liquor is obtained；
Step S170, obtains the second slurry, and be coated on the carbon-coating surface by the 3rd mixed liquor by milling；
Step S180, the aluminium foil that the carbon-coating surface is coated with into the second slurry is toasted, and the baking of the second slurry is obtained
Source/drain and the surface for being formed at the carbon-coating.
The current major requirement to electrokinetic cell has：Discharge power requires high, and charge-discharge performance speed is fast, and cycle life will
Ask long.The electric conductivity of LFP materials in itself is poor, therefore, and the sub-micron even particle of Nano grade are made mostly to increase conduction
Property.But what LFP particles were directly contacted or had any problem with aluminium foil, it is therefore necessary to compensated, led simultaneously by conductive coating
The appearance of electrocoat is also beneficial to LFP particles and directly bonded with aluminium foil.
In such a anode pole piece preparation method, the first slurry uniformly, fine and smoothly is coated in aluminium foil surface, it can be provided
Splendid static conductive performance, collects the micro-current of active material, so as to be greatly lowered between positive electrode and afflux
Contact resistance, and adhesive ability between the two can be improved.Carbon coated aluminum foil plays anticorrosion and anti-oxidation effect to collector,
Stability, security and the reliability of battery are improved, the cycle performance of battery is improved, while the dynamic internal resistance of battery can be reduced,
Improve battery with two side terminals and combo.
In the present embodiment, first binding agent is allyl resin, aqueous polyurethane, aqueous epoxy resins, nanometer water
The one or more of property polyester.
In the present embodiment, first conductive agent is electrically conductive graphite, conductive black, CNT, one kind of graphene
Or it is several.For example, the first conductive agent is the mixture of electrically conductive graphite and CNT, wherein, electrically conductive graphite and CNT
Mass ratio is 2：1.For example, the first conductive agent is the mixture of conductive black and CNT, wherein, conductive black and carbon nanometer
The mass ratio of pipe is 3：1.For example, the first conductive agent is the mixture of electrically conductive graphite, conductive black and graphene, wherein, it is conductive
The mass ratio of graphite, conductive black and graphene is 2：2：1.
In the present embodiment, the thickness of the aluminium foil is 16~20 μm, and preferably the thickness of aluminium foil is 18 μm.
In the present embodiment, in the step s 120, after aqueous solvent and the first binding agent are mixed, it is stirred, it is stirred
Temperature control is in normal temperature in journey, and mixing time is 50~60min.
In the present embodiment, in step s 130, the silane coupler of epoxy radicals, the first conductive agent and the first mixed liquor are mixed
After conjunction, first carry out 15~25RPM and stir slowly, 500~800RPM disperses slowly, and the time is 50~70min, then to carry out 30~40RPM fast
Stir, 1200~1500RPM disperses soon, the time is 55~65min.
In the present embodiment, in step S140, dual coating is carried out to aluminium foil, is that the first slurry is coated on aluminium foil
Two surfaces.
In the present embodiment, in step S150, the aluminium foil for being coated with the first slurry is positioned in baking box and toasted,
Baking box gradually rises up to 200 DEG C from 60 DEG C, then gradually decreases down 60 DEG C.
In the present embodiment, in step S180, the aluminium foil that carbon-coating surface is coated with into the second slurry is positioned in baking box
Toasted, baking box gradually rises up to 200 DEG C from 60 DEG C, then gradually decreases down 60 DEG C.
As shown in Figure 1 to Figure 3, another embodiment of the invention is a kind of anode pole piece 10, passes through above-mentioned positive pole pole
Obtained by the preparation method of piece, anode pole piece 10 includes：Aluminium foil 100, carbon-coating 200, source/drain 300.
Carbon-coating coating area 110 is formed in the middle of the surface of aluminium foil 100, the both sides on the surface of aluminium foil 100 are formed respectively
Aluminium foil is left white area 120, and the carbon-coating 200 is coated on the carbon-coating coating area 110.
Active material coating area 210, the both sides difference on the surface of carbon-coating 200 are formed in the middle of the surface of carbon-coating 200
Form carbon-coating and be left white area 220, the source/drain 300 is coated on the active material coating area 210.
Another embodiment of the invention is a kind of preparation method of lithium ion battery, the preparation method of lithium ion battery, bag
Include following steps：
Step S210 is there is provided cathode pole piece, electrolyte, positive pole ear, negative lug, barrier film, while offer is above-mentioned just
Pole pole piece；
Step S220, positive pole ear and negative lug are respectively welded on anode pole piece and cathode pole piece；
Step S230, barrier film is positioned between anode pole piece and cathode pole piece；
Step S240, is wound to anode pole piece, cathode pole piece and barrier film；
Step S250, vacuum bakeout is carried out by the anode pole piece after winding, cathode pole piece and barrier film；
Step S260, injects electrolyte, obtains lithium ion battery semi-finished product, carries out high temperature static；
Lithium ion battery semi-finished product are carried out negative pressure chemical conversion by step S270, and high temperature is static；
Lithium ion battery semi-finished product are carried out vacuum suction, concora crush and weldering sealing nail, obtain finished product lithium ion by step S280
Battery.
In the present embodiment, electrolyte includes：Lithium hexafluoro phosphate, EC or PC one or two, the one of DMC, DEC, EMC
Plant or several, film for additive, electrolyte stabilizer.
As shown in figure 4, cycle performance test is carried out to the lithium ion battery and traditional lithium ion battery of the present invention, can
Know, lithium ion battery of the invention with traditional lithium ion battery in the case where cycle-index is continuously increased, two groups of lithium ions
The capacity of battery is all constantly declining, wherein, during 0~1500 cycle charge-discharge, the appearance of two groups of lithium ion batteries
Change in terms of amount decline is more or less the same, and after 1500 cycle charge-discharges, traditional lithium ion battery is compared to the present invention
Lithium ion battery, the capacity of traditional lithium ion battery declines obvious, and the capacity of the lithium ion battery of the present invention declines not
Substantially.
As shown in figure 5, carrying out inner walkway to lithium ion battery of the invention and traditional lithium ion battery, there is provided this hair
Bright lithium ion battery and each 100 groups traditional of lithium ion battery, it is known that, 100 groups of lithium ion batteries of the invention it is average in
Hinder for 0.3836m Ω, and the average internal resistance of 100 groups of traditional lithium ion batteries is 0.5939m Ω, lithium ion battery of the invention
Average internal resistance be less than the average internal resistance of traditional lithium ion battery.Meanwhile, the standard of 100 groups of lithium ion batteries of the invention
Difference is 0.004856, and the standard deviation of traditional 100 groups of lithium ion batteries is 0.02732, it is known that, 100 groups of lithiums of the invention from
Sub- battery with two side terminals is better than the uniformity of 100 groups of traditional lithium ion batteries.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (6)
1. a kind of anode pole piece preparation method, it is characterised in that the anode pole piece includes aluminium foil, is formed at the aluminium foil surface
Carbon-coating, be formed at the source/drain on the carbon-coating surface；
The anode pole piece preparation method comprises the following steps：
There is provided aluminium foil by step S110；
Step S120, is in mass ratio 100~200：1~30, by aqueous solvent and the first binding agent it is well mixed after, obtain the
One mixed liquor；
Step S130, is in mass ratio 10~30：90~96：101~230, by the silane coupler of epoxy radicals, the first conductive agent
After being well mixed with the first mixed liquor, the second mixed liquor is obtained；
Step S140, obtains the first slurry, and be coated on aluminium foil surface by the second mixed liquor by milling；
Step S150, the aluminium foil for being coated with the first slurry is toasted, and the baking of the first slurry obtains carbon-coating and is formed at described
The surface of aluminium foil；
Step S160, is in mass ratio 90~98：1~10：1~30, electrode active material, the second conductive agent and second are bonded
After agent is well mixed, the 3rd mixed liquor is obtained；
Step S170, obtains the second slurry, and be coated on the carbon-coating surface by the 3rd mixed liquor by milling；
Step S180, the aluminium foil that the carbon-coating surface is coated with into the second slurry is toasted, and the baking of the second slurry obtains electrode
Active layer and the surface for being formed at the carbon-coating.
2. the preparation method of anode pole piece according to claim 1, it is characterised in that first binding agent is propylene tree
Fat, aqueous polyurethane, aqueous epoxy resins, the one or more of nanometer water polyester.
3. the preparation method of anode pole piece according to claim 1, it is characterised in that first conductive agent is conductive stone
Ink, conductive black, CNT, the one or more of graphene.
4. anode pole piece preparation method according to claim 1, it is characterised in that the thickness of the aluminium foil is 16~20 μ
m。
5. a kind of anode pole piece, it is characterised in that pass through the preparation of the anode pole piece described in any one in Claims 1-4
Obtained by method, including：Aluminium foil, carbon-coating, source/drain,
Carbon-coating coating area is formed in the middle of the aluminium foil surface, the both sides of the aluminium foil surface form aluminium foil and are left white area respectively, institute
State carbon-coating and be coated on the carbon-coating coating area；
Active material coating area is formed in the middle of the carbon-coating surface, the both sides on the carbon-coating surface form carbon-coating and are left white respectively
Area, the source/drain is coated on the active material coating area.
6. a kind of preparation method of lithium ion battery, it is characterised in that comprise the following steps：
Step S210 is there is provided cathode pole piece, electrolyte, positive pole ear, negative lug, barrier film, while providing described in claim 5
Anode pole piece；
Step S220, positive pole ear and negative lug are respectively welded on anode pole piece and cathode pole piece；
Step S230, barrier film is positioned between anode pole piece and cathode pole piece；
Step S240, is wound to anode pole piece, cathode pole piece and barrier film；
Step S250, vacuum bakeout is carried out by the anode pole piece after winding, cathode pole piece and barrier film；
Step S260, injects electrolyte, obtains lithium ion battery semi-finished product, carries out high temperature static；
Lithium ion battery semi-finished product are carried out negative pressure chemical conversion by step S270, and high temperature is static；
Lithium ion battery semi-finished product are carried out vacuum suction, concora crush and weldering sealing nail, obtain finished product lithium-ion electric by step S280
Pond.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107706361A (en) * | 2017-08-14 | 2018-02-16 | 宁波维科新能源科技有限公司 | A kind of ternary compound potassium ion electrokinetic cell |
| CN108288699A (en) * | 2018-01-25 | 2018-07-17 | 中航锂电（洛阳）有限公司 | A kind of composite lithium iron phosphate material and preparation method thereof, anode pole piece, lithium ion battery |
| CN111864210A (en) * | 2019-04-29 | 2020-10-30 | 深圳格林德能源集团有限公司 | Carbon-coated aluminum foil for lithium ion battery and preparation method thereof |
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| CN111864210A (en) * | 2019-04-29 | 2020-10-30 | 深圳格林德能源集团有限公司 | Carbon-coated aluminum foil for lithium ion battery and preparation method thereof |
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Application publication date: 20170811 |