CN107403952A - Fast fluid injection is high to infiltrate long-life lithium battery and manufacture method and mould - Google Patents
Fast fluid injection is high to infiltrate long-life lithium battery and manufacture method and mould Download PDFInfo
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- CN107403952A CN107403952A CN201710621371.5A CN201710621371A CN107403952A CN 107403952 A CN107403952 A CN 107403952A CN 201710621371 A CN201710621371 A CN 201710621371A CN 107403952 A CN107403952 A CN 107403952A
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- positive
- lithium battery
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- life lithium
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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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The present invention is disclosed the technical scheme is that infiltrating long-life lithium battery and manufacture method and mould using a kind of fast fluid injection is high, the long-life lithium battery includes housing and closes the top cover of shell nozzle, and liquid injection port is provided with the top cover；The positive and negative plate of some interlaced stackings is provided with housing；Barrier film is separated between the positive and negative plate；The positive and negative plate is by substrate and is coated on the slurry coating of substrate surface and is made；Groove through the sensible substrate of slurry coating is set wherein at least on positive plate.
Description
Technical field
The present invention relates to a kind of long-life lithium battery, manufacture the method for the long-life lithium battery and for manufacturing the longevity
Order the mould of lithium battery.
Background technology
Lithium ion battery due to have the advantages that voltage it is high, it is higher than energy, have extended cycle life, storage time it is long, portable
Such as mobile phone on formula electronic equipment, DV and laptop computer are used widely, and are widely used in electronic
The big-and-middle-sized equipment such as automobile, electric tool and industrial energy storage, but large-scale rectangular lithium ion battery due to volume it is big, inner space
Few, pole piece density is big, causes fluid injection speed slow, infiltrating time length.
Existing long-life lithium battery fluid injection technology typically carries out vacuum pumping liquid injection using filling machine, first takes out inside battery
Vacuum, then injected the electrolyte into by topping-up pump in battery container, because electrode slice is closely coupled and inside battery is vacant
Space is small, causes electrolyte diffusion velocity slow, and pole piece wetting velocity is slow, often injects after certain electrolyte, it is necessary to wait one section
Time (5-30min), after pole piece adsorbs a certain amount of electrolyte, required electrolyte is re-injected, fluid injection efficiency is low.
For ensure lithium ion battery before chemical conversion sufficient standing activation, electrolyte can fully infiltrate electrode slice and every
Film, prior art are melted into preceding control certain relative humidity and temperature after typically adopting the technology that fluid injection, carried out quiet for a long time
Put, 5-9 days need to be stood (120-216h) as normal temperature is stood, or quiescence in high temperature, 40-55 DEG C of temperature, 2-4 days time (48-
96h), time of repose is grown, and it is low to stand efficiency.
Existing lithium ion battery technology, it is secondary somewhat by the electrolyte lost in secondary fluid injection supplement chemical conversion after chemical conversion
Fluid infusion is wasted time and energy, often also certain risk.
The content of the invention
In view of this, the present invention provides a kind of high infiltration long-life lithium battery of fast fluid injection and preparation method and frock, the length
The quick wetting efficiency of life-span lithium battery fluid injection is high, and time of repose is short.
To solve above technical problem, the technical scheme is that using a kind of fast high infiltration long-life lithium electricity of fluid injection
Pond, including housing and the top cover for closing shell nozzle, are provided with liquid injection port on the top cover；Some mutually friendships are provided with housing
The positive and negative plate that mistake stacks；Barrier film is separated between the positive and negative plate；The positive and negative plate is by substrate and is coated on
The slurry coating of substrate surface is made；Groove through the sensible substrate of slurry coating is set wherein at least on positive plate.Certainly most
It is well that groove is respectively provided with positive and negative plate.Groove forms passage, the lithium-ion electric with inner passage in inside lithium ion cell
Pool structure, inside lithium ion cell space is improved, when injecting electrolyte, electrolyte quickly can smoothly be injected into the passage
It is interior, the fluid infusion again without waiting for after, improve injecting electrolytic solution speed；After electrolyte is full of passage, it can be spread as both sides pole piece,
Compared with electrolyte is spread at the top of battery core merely, the wetting velocity of electrolyte is greatly improved；Chemical conversion produces gas can be from this
Passage is quickly discharged；Unnecessary electrolyte can be stored in channel space, when chemical conversion and the follow-up electrolyte using consumption, the portion
Electrolyte is divided to play a part of supplementing electrolyte, so as to lift the service life of battery.
As an improvement the grooved position on the adjacent pole piece is corresponding.So that electrolyte can flow through each piece quickly
Pole piece.
As a kind of further improvement, some grooves are provided with same pole piece, and at least one groove is positioned at note
Immediately below liquid mouth, and edge is through to lower edge from positive and negative plate.Electrolyte is enabled quickly to infiltrate monoblock pole piece.
As a preferred embodiment, 5 millimeters of the width ＜ of the groove, and the groove width ratio in same model on positive plate
The small 0.2-2 millimeters of groove width on negative plate.
A kind of method for manufacturing long-life lithium battery, comprises the following steps：
A. slurry is configured；
B. slurry interval is coated on substrate and forms groove；
C. suppress；
D. cut；The substrate suppressed is cut into several pieces along groove direction；
E. it is die cut；The substrate cut that will have been cut is into monolithic pole piece；
F. monolithic positive and negative plate is staggeredly stacked, and barrier film is set between；
G. the battery core folded by some positive and negative plates and barrier film heap is connected with top cover, and loads housing；Then will top
Lid is fixed with housing；
H. electrolyte is injected after extracting vacuum to enclosure interior；
I. stand.
Improved as another further, the paste composition includes active material, conductive agent, binding agent and molten
Agent.
As an improvement the active material of positive pole can be that LiFePO4, cobalt acid lithium, ternary, LiMn2O4 etc. is therein
One or more mixing；Negative electrode active material is Delanium, native graphite, and silicon-carbon cathode etc. is therein a kind of and a variety of mixed
Close.The conductive agent can be one or more mixing therein such as SP, KS-6, CNTs, graphene.The binding agent positive pole
For PVDF, negative pole is SBR and/or CMC, and the solvent just extremely NMP, negative pole is deionized water.
As an improvement squash type coating is carried out to substrate using extrusion coating machine in step B.
A kind of mould for being used to manufacture long-life lithium battery, including upper die and lower die；It can be spelled inside the upper die and lower die
Synthesis accommodates the die cavity of substrate；The material hole of sensible die cavity is provided with the lower mould；Also include the interior pad being padded between upper and lower mould
Piece；The internal gasket is C-shaped, and its recess is provided with some parallel catch.
As a preferred embodiment, the quantity of the catch is not more than 10.
As a preferred embodiment, the catch makes for metal.
Brief description of the drawings
Fig. 1 is the structural representation of long-life lithium battery in the present invention.
Fig. 2 is the structural representation that metacoxal plate is coated with the present invention.
Fig. 3 is the structural representation of mould.
Fig. 4 is the structural representation of pad.
Marked in figure：1 top cover, 2 liquid injection ports, 3 pole pieces, 4 grooves, 5 cutting lines, 6 die cut lines, 7 internal gaskets, 8 catch, on 9
Mould, 10 times moulds, 11 liquid injection ports, 31 substrates, 32 slurry coatings.
Embodiment
In order that those skilled in the art more fully understands technical scheme, with reference to embodiment
The present invention is described in further detail.
As Fig. 1 present invention provides a kind of high infiltration long-life lithium battery of fast fluid injection, including housing and closing shell nozzle
Top cover 1, be provided with liquid injection port 2 on the top cover 1；The positive and negative plate 3 of some interlaced stackings is provided with housing；It is described
Barrier film is separated between positive and negative plate 3；The positive and negative plate 3 is by substrate 31 and is coated on the slurry coating of substrate surface
32 are made；Groove 4 through the sensible substrate 31 of slurry coating 32 is set wherein at least on positive plate 3.Described in the present embodiment just,
The groove 4 through the sensible substrate 31 of slurry coating 32 is respectively provided with negative plate 3.The position pair of groove 4 on some positive and negative plates 3
Should, it is respectively positioned on positive and negative plate 3 and hits exactly.Groove 4 is located at immediately below liquid injection port 2, and edge is through to lower edge from positive and negative plate 3.
5 millimeters of the width ＜ of groove 4, and the width of groove 4 in same model on positive plate is smaller than the width of groove 4 on negative plate
0.2-2 millimeters.
The present invention also provides a kind of method for manufacturing above-mentioned long-life lithium battery, comprises the following steps：
A. slurry is configured；Paste composition includes active material, conductive agent, binding agent and solvent., the active material of positive pole can
Think one or more mixing therein such as LiFePO4, cobalt acid lithium, ternary, LiMn2O4；Negative electrode active material is Delanium,
Therein a kind of and a variety of mixing such as native graphite, silicon-carbon cathode.The conductive agent can be SP, KS-6, CNTs, graphene etc.
One or more mixing therein.The binding agent just extremely PVDF, negative pole are SBR and/or CMC, and the solvent is just extremely
NMP, negative pole are deionized water.
B. slurry interval is coated on substrate and forms groove；Slurry interval after slurry is applied on substrate, most
Extrusion coating machine is used well.Substrate overall width is 20-800mm, and the coating pole piece thickness is 50-400 μm, and the base material is thick
Spend for 6-50 μm, as shown in Figure 2.
C. suppress；For substrate (pole piece) after coated slurry by roll-in, roll-in thickness is 50-300 μm.
D. cut；The substrate suppressed is cut into several pieces along groove direction；It is as shown in Figure 2 to cut line.
E. it is die cut；The substrate cut that will have been cut is into monolithic pole piece；Die cut lines are as shown in Figure 2.
F. monolithic positive and negative plate is staggeredly stacked, and barrier film is set between；
G. the battery core folded by some positive and negative plates and barrier film heap is connected with top cover, and loads housing；Then will top
Lid is fixed with housing；
H. electrolyte is injected after extracting vacuum to enclosure interior；
I. stand.10-14 hours are stood at a temperature of 38-42 DEG C.
As shown in Figure 3, Figure 4, it is coated in above-mentioned steps B using extrusion coating machine, the extrusion coating machine extrusion die,
Including upper mould 9 and lower mould 10；The die cavity of the upper mould 9 and the lower inside capable assembling of mould 10 into receiving substrate；Opened on the lower mould 10
There is the material hole 11 of sensible die cavity；Also include the internal gasket 7 being padded between mould 9, lower mould 10；The internal gasket 7 is C-shaped, its
Recess is provided with some parallel catch 8.The quantity of catch 8 is not more than 10.Catch 8 is preferably made by metal.
Slurry enters die cavity by the material hole 11 on lower mould 10, and the slurry sprayed by die head nozzle location is applied to
On matrix foil, the catch 8 prevents slurry from spraying on matrix foil.
Below by way of an example, the present invention will be described.
The preparation of positive plate：
Plus plate current-collecting body selects 16 μm of electrolytic aluminum foil, and positive active material selects LiFePO4, the control of its particle diameter (D50)
At 4 ± 1 μm；
Positive plate prepares as follows.
Kynoar 48% is added in 1-METHYLPYRROLIDONE by S1, and mixing obtains bonding agent；
S2 takes LiFePO4 96%, and graphene 1%, CNT 1% is added in step s1 bonding agent 2%, and is led to
Cross conjunction pulp grinder to stir to obtain anode active material slurry, slurry viscosity is controlled in 3000Pa.s~4500Pa.s
Pads of the S3 by extrusion coater and with metal catch realizes coating pole piece form described above, passes through roll-in
It is 181mm that cutting cross cutting, which obtains monolithic length, width 126mm, 150 μm of thickness, and groove width 1.5mm is located at pole piece middle
Positive plate.
Negative plate prepares as follows：
Negative current collector selects 8 μm of electrolytic copper foil, and negative electrode active material selects Delanium, the control of its particle diameter (D50)
At 15 ± 1 μm；
Negative plate prepares as follows.
Sodium carboxymethylcellulose (CMC) 50% is added in deionized water by S1, and mixing obtains thickener；
S2 takes Delanium 95%, graphene 1%, CNT (CNTs) 1%, and butadiene-styrene rubber (SBR) 2% is added to step
In rapid s1 thickener 1%, and stir to obtain negative electrode active material slurry by closing pulp grinder, slurry viscosity is controlled in 2000Pa.s
~3000Pa.s
Pads of the S3 by extrusion coater and with metal catch realizes coating pole piece form described above, passes through roll-in
It is 184mm that cutting cross cutting, which obtains monolithic length, width 129mm, 100 μm of thickness, and groove width 2.0mm is located at pole piece middle
Negative plate.
Positive plate 20, negative plate 21 and barrier film made of by more than build up battery core by way of lamination, pass through
Cover plate welding, enter shell, top cover welding, carry out vacuum pumping liquid injection, injection 180g electrolyte, 45 DEG C of quiescence in high temperatures.Electrolyte be with
LiPF6 is lithium salts, EMC (methyl ethyl ester), EC (ethylene carbonate), DMC (dimethyl carbonate) and DEC (carbonic acid diethyls
Ester) be solvent organic solution.
The pole piece of same size is made using identical system in comparative example, simply not with groove among pole piece, same positive pole
Piece 20, negative plate 21 and barrier film build up battery core by way of lamination, are welded by cover plate, enter shell, top cover welding, enter
Row vacuum pumping liquid injection, injection 180g electrolyte, quiescence in high temperature.
It can be seen that by contrast.Shorten 86% using the lithium ion battery liquid injection time of the present invention, time of repose shortens
75%, service life has a certain degree of extension.
It the above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
The limitation of the present invention, protection scope of the present invention should be defined by claim limited range.For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, some improvements and modifications can also be made, these change
Enter and retouch and also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of high infiltration long-life lithium battery of fast fluid injection, including housing and the top cover for closing shell nozzle, on the top cover
It is provided with liquid injection port；The positive and negative plate of some interlaced stackings is provided with housing；Be separated between the positive and negative plate every
Film；It is characterized in that：The positive and negative plate is by substrate and is coated on the slurry coating of substrate surface and is made；Wherein at least
Groove through the sensible substrate of slurry coating is set on positive plate.
A kind of 2. fast high infiltration long-life lithium battery of fluid injection according to claim 1, it is characterised in that：The adjacent pole piece
On grooved position it is corresponding.
A kind of 3. fast high infiltration long-life lithium battery of fluid injection according to claim 1, it is characterised in that：Set on same pole piece
Some grooves are equipped with, and at least one groove is located at immediately below liquid injection port, and edge is through to lower edge from positive and negative plate.
A kind of 4. fast high infiltration long-life lithium battery of fluid injection according to claim 1, it is characterised in that：The width of the groove
5 millimeters of ＜ is spent, and the groove width in same model on positive plate is than the small 0.2-2 millimeters of groove width on negative plate.
A kind of 5. method for long-life lithium battery described in manufacturing claims 1-4 any one, it is characterised in that including with
Lower step：
A. slurry is configured；
B. slurry interval is coated on substrate and forms groove；
C. suppress；
D. cut；The substrate suppressed is cut into several pieces along groove direction；
E. it is die cut；The substrate cut that will have been cut is into monolithic pole piece；
F. monolithic positive and negative plate is staggeredly stacked, and barrier film is set between；
G. the battery core folded by some positive and negative plates and barrier film heap is connected with top cover, and loads housing；Then by top cover with
Housing is fixed；
H. electrolyte is injected after extracting vacuum to enclosure interior；
I. stand.
A kind of 6. method for manufacturing long-life lithium battery according to claim 5, it is characterised in that：The paste composition bag
Include active material, conductive agent, binding agent and solvent.
A kind of 7. method for manufacturing long-life lithium battery according to claim 6, it is characterised in that：The active material of positive pole
Can be one or more mixing therein such as LiFePO4, cobalt acid lithium, ternary, LiMn2O4；Negative electrode active material is artificial stone
Therein a kind of and a variety of mixing such as ink, native graphite, silicon-carbon cathode；The conductive agent can be SP, KS-6, CNTs, graphite
One or more mixing therein such as alkene；The binding agent just extremely PVDF, negative pole are SBR and/or CMC, and the solvent is just
Extremely NMP, negative pole are deionized water.
8. a kind of mould for being used for long-life lithium battery described in any one in manufacturing claims 1-4, including upper die and lower die；
Die cavity of the capable assembling into receiving substrate inside the upper die and lower die；The material hole of sensible die cavity is provided with the lower mould；It is special
Sign is：Also include the internal gasket being padded between upper and lower mould；The internal gasket is C-shaped, and its recess is provided with some parallel
Catch.
A kind of 9. mould for manufacturing long-life lithium battery according to claim 8, it is characterised in that：The quantity of the catch
No more than 10.
A kind of 10. mould for manufacturing long-life lithium battery according to claim 8, it is characterised in that：The catch is gold
Category makes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710621371.5A CN107403952A (en) | 2017-07-26 | 2017-07-26 | Fast fluid injection is high to infiltrate long-life lithium battery and manufacture method and mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710621371.5A CN107403952A (en) | 2017-07-26 | 2017-07-26 | Fast fluid injection is high to infiltrate long-life lithium battery and manufacture method and mould |
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| Publication Number | Publication Date |
|---|---|
| CN107403952A true CN107403952A (en) | 2017-11-28 |
Family
ID=60401590
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|---|---|---|---|
| CN201710621371.5A Pending CN107403952A (en) | 2017-07-26 | 2017-07-26 | Fast fluid injection is high to infiltrate long-life lithium battery and manufacture method and mould |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110797478A (en) * | 2018-08-01 | 2020-02-14 | 宁德时代新能源科技股份有限公司 | Secondary battery |
| CN112467073A (en) * | 2020-12-21 | 2021-03-09 | 江苏双登富朗特新能源有限公司 | Lithium ion battery pole piece and preparation method thereof |
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Application publication date: 20171128 |