CN105870489B - Monomer-polymer lithium ion battery manufacturing method and its assemble method - Google Patents
Monomer-polymer lithium ion battery manufacturing method and its assemble method Download PDFInfo
- Publication number
- CN105870489B CN105870489B CN201610397905.6A CN201610397905A CN105870489B CN 105870489 B CN105870489 B CN 105870489B CN 201610397905 A CN201610397905 A CN 201610397905A CN 105870489 B CN105870489 B CN 105870489B
- Authority
- CN
- China
- Prior art keywords
- diaphragm
- slurry
- negative electrode
- polymer
- membrane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- H01M10/04—Construction or manufacture in general
- H01M10/0468—Compression means for stacks of electrodes and separators
-
- 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
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
-
- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
-
- 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
Abstract
The diaphragm slurry of preparation, is first coated on polyester film by a kind of monomer-polymer lithium ion battery manufacturing method and its assemble method, and diaphragm membrane is made；Diaphragm membrane is fitted in the surface of positive plate, then is pressed together diaphragm membrane and positive plate by way of hot pressing, the polyester film in diaphragm membrane is torn off after cooling；Septate positive plate will be pressed later be superimposed with negative electrode tab and be bonded together, obtain battery battery core.This assembling mode, as intermediate material, solves the problems, such as to cause to be superimposed out-of-flatness since diaphragm is excessively thin, can guarantee well the quality of battery by polyester film, thus single battery high capacity may be implemented.
Description
Technical field
This application involves technical field of lithium-ion battery, and in particular to a kind of monomer-polymer lithium ion battery manufacture
Method and its assemble method.
Background technique
With the development of new-energy automobile industry, the cruising ability of automobile is increasingly paid attention to, how to improve the continuous of automobile
Boat ability is also the technological difficulties for needing to tackle key problems in industry.And in order to improve the cruising ability of automobile, it mainly needs to improve electricity
The capacity in pond, therefore, high capacity cell are applied and are given birth to.Also, high capacity cell cannot only be applied to automobile industry, can also be with
It is applied to the fields such as energy storage, electric power.
Referring to FIG. 1, for the structural schematic diagram of battery core single in lithium ion battery.
It include positive plate A101, negative electrode tab A102 and diaphragm A103 in battery battery core.Positive plate A101 and negative electrode tab A102
Between be placed with diaphragm A103.In battery core shown in FIG. 1, including a negative electrode tab A102 and two panels positive plate A101.Positive plate
It is coated with anode sizing agent on the inside of the collector of A101, the collector two sides of negative electrode tab A102 are coated with negative electrode slurry.
The manufacturing method of battery includes following several steps: battery anode slice manufacture, battery cathode sheet manufacture, battery diaphragm
Manufacture and battery assembly.
In the prior art, battery assembly step is specifically by positive plate, diaphragm, negative electrode tab according to structure one shown in FIG. 1
One layer of laminated structure of layer gets on.In this mode being directly superimposed, since diaphragm is very thin, in superposition, it is not easy to flat
It is whole, to influence battery quality.
Summary of the invention
This application provides a kind of monomer-polymer lithium ion battery manufacturing method and its assemble methods, solve battery and exist
Assembling process septation is not easy smooth problem.
According to a first aspect of the present application, this application provides a kind of assemble method of monomer-polymer lithium ion battery,
Include:
The diaphragm slurry of preparation is coated on polyester film, diaphragm membrane is made；
Diaphragm membrane is fitted in the surface of positive plate；
Diaphragm membrane and positive plate are pressed together by way of hot pressing, the polyester in diaphragm membrane is torn off after cooling
Film；
It septate positive plate will be pressed is superimposed with negative electrode tab and is bonded together, obtain battery battery core.
According to a second aspect of the present application, present invention also provides a kind of manufacturers of monomer-polymer lithium ion battery
Method, comprising:
Positive plate manufacturing step, is used to prepare positive plate；
Negative electrode tab manufacturing step, is used to prepare negative electrode tab；
Diaphragm membrane manufacture piece is rapid, and for the diaphragm slurry of preparation to be coated on polyester film, diaphragm membrane is made；
Assembling steps, the assembling steps include:
Diaphragm membrane is fitted in the surface of positive plate；
Diaphragm membrane and positive plate are pressed together by way of hot pressing, the polyester in diaphragm membrane is torn off after cooling
Film；
It septate positive plate will be pressed is superimposed with negative electrode tab and is bonded together, obtain battery battery core.
In monomer-polymer lithium ion battery manufacturing method provided by the present application and its assemble method, first by the diaphragm of preparation
Slurry is coated on polyester film, and diaphragm membrane is made；Diaphragm membrane is fitted in the surface of positive plate, then the side for passing through hot pressing
Formula presses together diaphragm membrane and positive plate, and the polyester film in diaphragm membrane is torn off after cooling；Later by pressing have every
The positive plate of film is superimposed with negative electrode tab to be bonded together, and obtains battery battery core.This assembling mode passes through in polyester film conduct
Between substance, solve the problems, such as to cause since diaphragm is excessively thin to be superimposed out-of-flatness, can guarantee the quality of battery well.It therefore can
To do greatly battery pole piece size, battery cell battery high capacity is realized.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the application specific embodiment or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the application, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of single battery core in lithium ion battery；
Fig. 2 is the flow diagram of the manufacturing method of monomer-polymer lithium ion battery in a kind of embodiment of the application；
Fig. 3 is the detailed process of assembling steps in a kind of embodiment monomer-polymer lithium ion battery manufacturing method of the application
Schematic diagram；
Fig. 4 is the process signal of the positive piece making method of monomer-polymer lithium ion battery in a kind of embodiment of the application
Figure；
Before Fig. 5 is hot pressing in the positive piece making method of one embodiment monomer-polymer lithium ion battery of the application
Positive plate structural schematic diagram；
After Fig. 6 is hot pressing in the positive piece making method of one embodiment monomer-polymer lithium ion battery of the application
Positive plate structural schematic diagram；
Fig. 7 is the process signal of the cathode piece making method of monomer-polymer lithium ion battery in a kind of embodiment of the application
Figure；
Before Fig. 8 is hot pressing in the cathode piece making method of one embodiment monomer-polymer lithium ion battery of the application
Negative plate structure schematic diagram；
After Fig. 9 is hot pressing in the cathode piece making method of one embodiment monomer-polymer lithium ion battery of the application
Negative plate structure schematic diagram；
Figure 10 is the process of the diaphragm membrane manufacturing method of monomer-polymer lithium ion battery in a kind of embodiment of the application
Schematic diagram；
Figure 11 is the flow diagram of the assemble method of monomer-polymer lithium ion battery in a kind of embodiment of the application.
Specific embodiment
It is clearly and completely described below in conjunction with technical solution of the attached drawing to the application, it is clear that described implementation
Example is some embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall in the protection scope of this application.
Present invention design is: in view of diaphragm is relatively thin, when it is superimposed with positive plate or negative electrode tab, being easy to lead
The problem of causing superposition out-of-flatness.Diaphragm slurry is first coated on polyester film by the application, and diaphragm membrane is made, then again will be every
Film diaphragm is added on anode by way of hot pressing, is torn off polyester film after cooling.In the application, polyester film is as base
Material, when diaphragm membrane is added on anode, solve the problems, such as diaphragm it is relatively thin caused by diaphragm out-of-flatness.
Embodiment one
Referring to FIG. 2, present embodiments providing a kind of manufacturing method of monomer-polymer lithium ion battery, including following step
It is rapid:
S1: positive plate manufacturing step is used to prepare positive plate.
S2: negative electrode tab manufacturing step is used to prepare negative electrode tab.
S3: diaphragm membrane manufacture piece is rapid, and for the diaphragm slurry of preparation to be coated on polyester film, diaphragm film is made
Piece.
S4: assembling steps.
Referring to FIG. 3, assembling steps (S4) include following sub-step:
S1.1: diaphragm membrane is fitted in the surface of positive plate.
S1.2: diaphragm membrane and positive plate are pressed together by way of hot pressing.In the present embodiment, it can use
Diaphragm membrane and positive plate, are pressed together on by the pressure of 100~140 DEG C of temperature and 1-20T (such as 10T) by way of hot pressing
Together.In other embodiments, the temperature and pressure that hot pressing uses can be set according to actual needs.
S1.3: the polyester film in diaphragm membrane is torn off after cooling.
S1.4: will press septate positive plate and be superimposed with negative electrode tab and be bonded together, and obtain battery battery core.
In monomer-polymer lithium ion battery manufacturing method provided in this embodiment, first the diaphragm slurry of preparation is coated on
On polyester film, diaphragm membrane is made；Diaphragm membrane is fitted in the surface of positive plate, then by diaphragm film by way of hot pressing
Piece is pressed together with positive plate, and the polyester film in diaphragm membrane is torn off after cooling；Septate positive plate will be pressed later
It is superimposed and is bonded together with negative electrode tab, obtain battery battery core.This assembling mode, as intermediate material, is solved by polyester film
Lead to the problem of being superimposed out-of-flatness since diaphragm is excessively thin, can guarantee the quality of battery well.
It should be noted that in other embodiments, the manufacturing step of positive plate and negative electrode tab can use the prior art
In any one feasible pattern.Alternatively, positive plate, negative electrode tab are using the manufacturing method preparation being provided below.
In the present embodiment, when preparing anode sizing agent, negative electrode slurry and diaphragm slurry, plasticizer (particular technique is added
Scheme refers to following embodiments two to example IV), it further include extraction step S5, extraction step packet after assembling steps S4
It includes: the battery core of assembling is placed in extraction solution, to extract the plasticizer in anode sizing agent, negative electrode slurry and diaphragm slurry.
Specifically, extraction solution can use methanol.
Certainly, if in other embodiments, when preparing anode sizing agent, negative electrode slurry and diaphragm slurry, not adding increasing
Agent is moulded, then then can not include extraction step in method provided in this embodiment.
Certainly, after the extraction step, it is also necessary to by entering shell, fluid injection, charging chemical conversion, aging, so that finished battery is obtained,
These steps are not illustrated in the embodiment of the present application, these steps can be using any feasible realization in the prior art
Scheme.
Embodiment two
Referring to FIG. 4, the present embodiment further correspondingly provides a kind of manufacturer of monomer-polymer based lithium-ion battery positive plate
Method (the positive plate manufacturing step S1 i.e. in above-described embodiment one) comprising below step:
Step 2.1: preparing collector and collector processing slurry, collector handles slurry and includes at least conductive agent.In general,
Plus plate current-collecting body uses aluminium foil.
Step 2.2: collector processing slurry is coated on collection liquid surface.
Step 2.3: preparing anode sizing agent, anode sizing agent includes at least positive electrode active materials, conductive agent and positive polymer.
Wherein, positive electrode active materials can use cobalt acid lithium, LiFePO4, nickle cobalt lithium manganate, nickel cobalt lithium aluminate, LiMn2O4, lithium nickelate
Deng.
Step 2.4: anode sizing agent being coated on polyester film, positive diaphragm is obtained.
Step 2.5: positive diaphragm is bonded with the collector for being coated with collector processing slurry, it will by way of hot pressing
Positive diaphragm is bonded together with collector, obtains positive plate.
In the present embodiment, the polymer that (anode) polymer that anode sizing agent uses can be used with diaphragm belongs to a kind of total
Polymers forms stable internal junction so that it is guaranteed that positive plate is polymerize together with commissure between diaphragm by polymeric
Structure, so that battery performance is more stable.
Preferably, collector processing slurry further includes binder, it can be ensured that closely connecing between anode sizing agent and collector
Touching, to reduce internal resistance, gives full play to the chemical property of positive electrode.
Specifically, the mass fraction of conductive agent is 20%-60%, the mass fraction of binder in collector processing slurry
For 40%-80%.Further, the mass fraction of conductive agent is 40%-50%, and the mass fraction of binder is 50%-60%.This
In embodiment, the mass fraction of conductive agent is 45%, and the mass fraction of binder is 55%.The present embodiment conductive agent and binder
The performance that the collector processing slurry of used proportion preparation can be optimal when further battery manufactures.
Specifically, conductive agent can be acetylene black, graphite powder, carbon nanotube or carbon fiber.Binder can be aqueous viscous
Agent is tied, such as polyamidoimide (PAI), polyimides (PI) ,-four base methyl acrylate (AMMA) of polyacrylonitrile, polyacrylonitrile
(PAN), polypropylene is also possible to oiliness binder, such as Kynoar to esters, sodium carboxymethylcellulose (CMC) etc.
(PVDF), Kynoar-hexafluoropropene (PVDF-HFP) etc..
In the present embodiment, the preparation step of collector may include: that first adhesive and conductive agent are stocked up by formula rate,
And corresponding solvent is weighed up than 1:10 by hundred parts of solid-liquid quality, if using aqueous binder, solvent pure water, if adopted
With oil binder, then solvent acetone.The solvent of formula ratio is first added in stirring container, then adds leading for formula ratio
Electric agent and binder, stir about 4~6 hours.After rear slurry is stirred, it is coated on the surface of plus plate current-collecting body aluminium foil, it is heated
Surface coated treatment is completed after drying, coating control is in 0.001~0.005mm thickness.
It should be noted that current collector aluminum foil process face can be with single or double, if the positive plate of battery design is outside
Face is then single side processing, if the positive plate of battery design is inside, double spread to handle.
Positive polymer can use the copolymer of Kynoar-hexafluoropropene (PVDF-HFP).
Preferably, anode sizing agent further includes plasticizer.Specifically, plasticizer can be phthalate (or adjacent benzene
Dioctyl phthalate salt is also known as phthalate ester) compound, such as dibutyl phthalate (DBP).Plasticizer is added, can increase just
Plasticizer is extracted by way of extraction after battery core assembling, while can made in positive plate again by the flexibility of pole piece
More uniformly to adsorb electrolyte polymer reaction occurs for hole.
Specifically, the mass fraction of positive electrode active materials is 65%-96%, the mass fraction of conductive agent in anode sizing agent
For 1%-12%, the mass fraction of positive polymer is 1%-8%, and the mass fraction of plasticizer is 2%-15%.Further, just
The mass fraction of pole active material is 73%-90%, and the mass fraction of conductive agent is 3%-7%, the quality point of positive polymer
Number is 4%-7%, and the mass fraction of plasticizer is 3%-13%.In the present embodiment, the mass fraction of positive electrode active materials is
75.51%, the mass fraction of conductive agent is 5.91%, and the mass fraction of positive polymer is 6.51%, the quality point of plasticizer
Number is 12.06%.The anode sizing agent of proportion preparation used by the present embodiment anode sizing agent can be reached when further battery manufactures
To optimal performance.
In the present embodiment, the step of preparing positive diaphragm, be can specifically include: solvent (such as acetone) is added in a reservoir；
Positive polymer is added into solvent, is warming up to 30-45 DEG C, stirs 2~4 hours, adds increasing after the dissolution of positive polymer
Agent is moulded, is stirred 0.5~2 hour, conductive agent is then added, after stirring 2~4 hours, adds positive electrode active materials, stirring 4~6
Hour, anode sizing agent is made；First by anode sizing agent after filter screen filtration, it is coated on polyester film；It is torn after Drying and cooling
From polyester film, to obtain positive diaphragm.
Specifically, filter screen selects the strainer of 100~200 mesh；The thickness of polyester film selects 0.02-0.1 millimeters；Anode
Slurry be coated on polyester film with a thickness of 0.05-0.3 millimeters；Using 56 when drying is coated with the polyester film of anode sizing agent
~70 DEG C of temperature；It, will be positive by way of hot pressing using the pressure of 100~140 DEG C of temperature and 1-20T (such as 10T)
Diaphragm is bonded together with collector.
It should be noted that positive diaphragm can be compound with entire volume with anode collection bluk recombination, then further according to battery capacity
Demand is cut into required shape；Or first positive diaphragm and plus plate current-collecting body can be cut into according to battery capacity demand required
Shape.
Fig. 5 and Fig. 6 are please referred to, respectively positive diaphragm and the schematic diagram before plus plate current-collecting body hot pressing and after hot pressing.Wherein,
101 be positive slurry coating, and 102 be polyester film, and 103 be aluminium foil (collector), and 104 handle slurry coating for collector.Fig. 5
Before hot pressing, the thickness of positive diaphragm (polyester film of anode sizing agent coating 101 and 102) can be 0.2mm, and 102 thickness of aluminium foil can
Think 0.016mm, the thickness that collector handles slurry coating 104 can be 0.002mm.After Fig. 6 hot pressing, positive diaphragm (anode
The polyester film of slurry coating 101 and 102) thickness can achieve 0.14mm.
It should also be noted that, collector used in this positive plate is aluminium foil.After lamination, if positive plate is outside,
Then plus plate current-collecting body aluminium foil needs to punch, and at this moment negative current collector (copper foil) inside, can punch, and can not also punch.Such as
Outside, then negative current collector needs to punch fruit negative current collector, and at this moment plus plate current-collecting body inside, can punch, can also be with
It does not punch.In addition, regardless of positive plate or negative electrode tab, if outside, only needed in single side (medial surface) coating sizing-agent,
The inside is then needed in double spread slurry.Plus plate current-collecting body punching can be circular hole, and diameter is maximum within the scope of 0.1-1.5mm
Spacing is less than 2mm.
In addition, the present embodiment additionally provides a kind of monomer-polymer based lithium-ion battery positive plate, the positive plate is using above-mentioned
It is prepared by the manufacturing method of monomer-polymer based lithium-ion battery positive plate.
Embodiment three
Referring to FIG. 7, the present embodiment further correspondingly provides a kind of manufacturer of monomer-polymer anode plate for lithium ionic cell
Method (the negative electrode tab manufacturing step S2 i.e. in above-described embodiment one) comprising below step:
Step 3.1: preparing collector and collector processing slurry, collector handles slurry and includes at least conductive agent.In general,
Negative current collector uses copper foil.
Step 3.2: collector processing slurry is coated on collection liquid surface.
Step 3.3: preparing negative electrode slurry, negative electrode slurry includes at least negative electrode active material, conductive agent and cathode polymer.
Wherein, negative electrode active material can be using carbon materials or silicon systems materials such as electrographite, natural graphite, hard carbon, carbonaceous mesophase spherules
Material or other composite oxide of metal (such as lithium titanate).
Step 3.4: negative electrode slurry being coated on polyester film, cathode membrane is obtained.
Step 3.5: cathode membrane is bonded with the collector for being coated with collector processing slurry, it will by way of hot pressing
Cathode membrane is bonded together with collector, obtains negative electrode tab.
In the present embodiment, the polymer that (cathode) polymer that negative electrode slurry uses can be used with diaphragm belongs to a kind of total
Polymers forms stable internal junction so that it is guaranteed that negative electrode tab is polymerize together with commissure between diaphragm by polymeric
Structure, so that battery performance is more stable.
Preferably, collector processing slurry further includes binder, it can be ensured that closely connecing between negative electrode slurry and collector
Touching, to reduce internal resistance, gives full play to the chemical property of negative electrode material.
Specifically, the mass fraction of conductive agent is 20%-60%, the mass fraction of binder in collector processing slurry
For 40%-80%.Further, the mass fraction of conductive agent is 40%-50%, and the mass fraction of binder is 50%-60%.This
In embodiment, the mass fraction of conductive agent is 45%, and the mass fraction of binder is 55%.The present embodiment conductive agent and binder
The performance that the collector processing slurry of used proportion preparation can be optimal when further battery manufactures.
Specifically, conductive agent can be acetylene black, graphite powder, carbon nanotube or carbon fiber.Binder can be aqueous viscous
Agent is tied, such as polyamidoimide (PAI), polyimides (PI) ,-four base methyl acrylate (AMMA) of polyacrylonitrile, polyacrylonitrile
(PAN), polypropylene is also possible to oiliness binder, such as Kynoar to esters, sodium carboxymethylcellulose (CMC) etc.
(PVDF), Kynoar-hexafluoropropene (PVDF-HFP) etc..
In the present embodiment, the preparation step of collector may include: that first adhesive and conductive agent are stocked up by formula rate,
And corresponding solvent is weighed up than 1:10 by hundred parts of solid-liquid quality, if using aqueous binder, solvent pure water, if adopted
With oil binder, then solvent acetone.The solvent of formula ratio is first added in stirring container, then adds leading for formula ratio
Electric agent and binder, stir about 4~6 hours.After rear slurry is stirred, it is coated on the surface of negative current collector copper foil, it is heated
Surface coated treatment is completed after drying, coating control is in 0.001~0.005mm thickness.
It should be noted that copper foil of affluxion body process face can be with single or double, if the negative electrode tab of battery design is outside
Face is then single side processing, if the negative electrode tab of battery design is inside, double spread to handle.
Cathode polymer can use the copolymer of Kynoar-hexafluoropropene (PVDF-HFP).
Preferably, negative electrode slurry further includes plasticizer.Specifically, plasticizer can be phthalate (or adjacent benzene
Dioctyl phthalate salt is also known as phthalate ester) compound, such as dibutyl phthalate (DBP).Plasticizer is added, can increase negative
Plasticizer is extracted by way of extraction after battery core assembling, while can made in negative electrode tab again by the flexibility of pole piece
More uniformly to adsorb electrolyte polymer reaction occurs for hole.
Specifically, the mass fraction of negative electrode active material is 65%-95%, the mass fraction of conductive agent in negative electrode slurry
For 1%-12%, the mass fraction of cathode polymer is 2%-8%, and the mass fraction of plasticizer is 2%-15%.Further, it bears
The mass fraction of pole active material is 70%-85%, and the mass fraction of conductive agent is 3%-7%, the quality point of cathode polymer
Number is 4%-13%, and the mass fraction of plasticizer is 5%-13%.In the present embodiment, the mass fraction of negative electrode active material is
73.57%, the mass fraction of conductive agent is 5.06%, and the mass fraction of cathode polymer is 9.56%, the quality point of plasticizer
Number is 11.81%.The negative electrode slurry of proportion preparation used by the present embodiment negative electrode slurry can be reached when further battery manufactures
To optimal performance.
In the present embodiment, the specific steps for preparing cathode membrane may include: addition solvent (such as acetone) in a reservoir；
Cathode polymer is added into solvent, is warming up to 30-45 DEG C, stirs 2~4 hours, adds increasing after the dissolution of cathode polymer
Agent is moulded, is stirred 0.5~2 hour, conductive agent is then added, after stirring 2~4 hours, adds negative electrode active material, stirring 4~6
Hour, negative electrode slurry is made；First by negative electrode slurry after filter screen filtration, it is coated on polyester film；It is torn after Drying and cooling
From polyester film, to obtain cathode membrane.
Specifically, filter screen selects the filter screen of 100~200 mesh；The thickness of polyester film selects 0.02-0.1 millimeters；It is negative
Pole slurry be coated on polyester film with a thickness of 0.05-0.3 millimeters；Drying uses when being coated with the polyester film of negative electrode slurry
56~70 DEG C of temperature；Using the pressure of 100~140 DEG C of temperature and 1-20T (such as 10T), will be born by way of hot pressing
Pole diaphragm is bonded together with collector.
It should be noted that cathode membrane can be compound with entire volume with negative pole currect collecting bluk recombination, then further according to battery capacity
Demand is cut into required shape；Or first cathode membrane and negative current collector can be cut into according to battery capacity demand required
Shape.
Fig. 8 and Fig. 9 are please referred to, respectively cathode membrane (is shown with the schematic diagram before negative current collector hot pressing and after hot pressing
The case where collector double spread negative electrode slurry).Wherein, 201 be cathode slurry coating, and 202 be polyester film, and 203 be copper
Foil (collector), 204 handle slurry coating for collector.Before Fig. 8 hot pressing, cathode membrane (201 He of single side negative electrode slurry coating
202 polyester films) thickness can be 0.13mm, 202 thickness of copper foil can be 0.009mm, collector handle slurry coating 204
Thickness can be 0.002mm.After Fig. 9 hot pressing, the thickness of cathode membrane (single side negative electrode slurry coating 201 and 202 polyester films)
Degree can achieve 0.11mm.
It should also be noted that, collector used in this negative electrode tab is copper foil.After lamination, if positive plate is outside,
Then plus plate current-collecting body aluminium foil needs to punch, and at this moment negative current collector (copper foil) inside, can punch, and can not also punch.Such as
Outside, then negative current collector needs to punch fruit negative current collector, and at this moment plus plate current-collecting body inside, can punch, can also be with
It does not punch.In addition, regardless of positive plate or negative electrode tab, if outside, only needed in single side (medial surface) coating sizing-agent,
The inside is then needed in double spread slurry.Negative current collector punching can be circular hole, and diameter is maximum within the scope of 0.1-1.5mm
Spacing is less than 2mm.
In addition, the present embodiment additionally provides a kind of monomer-polymer anode plate for lithium ionic cell, the negative electrode tab is using above-mentioned
It is prepared by the manufacturing method of monomer-polymer anode plate for lithium ionic cell.
Example IV
Referring to FIG. 10, the present embodiment accordingly provides a kind of manufacturing method of monomer-polymer lithium ion battery separator
(i.e. one septation diaphragm manufacturing step S3 of above-described embodiment) comprising below step:
Step 4.1: preparing diaphragm slurry, diaphragm slurry includes at least insulating packing and membrane polymer.
Step 4.2: diaphragm slurry being applied on polyester film, to obtain diaphragm membrane.
In the present embodiment, membrane polymer uses Kynoar-hexafluoropropene copolymer.
Specifically, the polymer that (positive/negative) polymer that positive/negative slurry uses can be used with diaphragm belongs to one kind
Copolymer is formed stable interior so that it is guaranteed that positive/negative pole piece is polymerize together with commissure between diaphragm by polymeric
Portion's structure, so that battery performance is more stable.
Insulating packing can be also possible to other using inorganic insulating materials such as nano silica, nanometer titanium dioxide aluminium
The composite nano materials of insulation.
Preferably, diaphragm slurry further includes plasticizer.Specifically, plasticizer can be phthalate (or adjacent benzene
Dioctyl phthalate salt is also known as phthalate ester) compound, such as dibutyl phthalate (DBP).Be added plasticizer, can increase every
The flexibility of film diaphragm is extracted plasticizer by way of extraction after battery core assembling, institute after plasticizer is extracted out
The pore of formation, more more uniform than the micropore that current PP or PE diaphragm is come out by mechanical stretching, the consistency of the internal resistance of cell is big
Big is improved.
Specifically, the mass fraction of polymer is 10%-40%, the mass fraction of insulating packing is 10%-30%, plasticising
The mass fraction of agent is 30%-60%.Further, the mass fraction of polymer is 25%-35%, the mass fraction of insulating packing
For 15%-25%, the mass fraction of plasticizer is 45%-55%.In the present embodiment, the mass fraction of polymer is 30%, absolutely
The mass fraction of edge filler is 16%, and the mass fraction of plasticizer is 54%.
In the present embodiment, the step of preparing diaphragm slurry includes: that solvent is added in a reservoir；It is poly- that diaphragm is added into solvent
Object is closed, is warming up to 30-45 DEG C, is stirred 2~4 hours, plasticizer is added after the dissolution of positive polymer, stirring 0.5~2 is small
When, insulating packing is then added, after stirring 0.5~2 hour, then grinds stirring 2~6 hours, diaphragm slurry is made.
After diaphragm slurry is made, first diaphragm slurry is coated after filter screen filtration on polyester film；Pass through later
Drying obtains diaphragm membrane.
Specifically, strainer selects the filter screen of 100~200 mesh；The thickness of polyester film selects 0.02-0.1 millimeters；Diaphragm
Slurry be coated on polyester film with a thickness of 0.01-0.1 millimeters；Using 56 when drying is coated with the polyester film of diaphragm slurry
~70 DEG C of temperature.
In addition, the present embodiment additionally provides a kind of monomer-polymer lithium ion battery separator, which uses above-mentioned monomer
It is prepared by the manufacturing method of polymer lithium cell diaphragm.
Embodiment five
Figure 11 is please referred to, based on the above embodiment the manufacturing method of a monomer-polymer lithium ion battery provided, this reality
It applies example and provides a kind of assemble method of monomer-polymer lithium ion battery, including below step:
Step 5.1: the diaphragm slurry of preparation being coated on polyester film, diaphragm membrane is made.
Step 5.2: diaphragm membrane is fitted in the surface of positive plate.
Step 5.3: being pressed together diaphragm membrane and positive plate by way of hot pressing.Specifically, using 100~
The pressure of 140 DEG C of temperature and 1-20T (such as 10T), is pressed together diaphragm membrane and positive plate by way of hot pressing.
Step 5.4: the polyester film in diaphragm membrane is torn off after cooling.
Step 5.5: septate positive plate will be pressed be superimposed with negative electrode tab and be bonded together, obtain battery battery core.
The specific implementation details of the assemble method of monomer-polymer lithium ion battery provided in this embodiment can be with reference to real
The related content that example one to four refers to is applied, details are not described herein again.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the application, rather than its limitations；To the greatest extent
Pipe is described in detail the application referring to foregoing embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, each embodiment technology of the application that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (9)
1. a kind of assemble method of monomer-polymer lithium ion battery characterized by comprising
The diaphragm slurry of preparation is coated on polyester film, diaphragm membrane is made；
Diaphragm membrane is fitted in the surface of positive plate；
Diaphragm membrane and positive plate are pressed together by way of hot pressing, the polyester in diaphragm membrane is torn off after cooling
Film；
It septate positive plate will be pressed is superimposed with negative electrode tab and is bonded together, obtain battery battery core；
Wherein, using 100~140 DEG C of temperature and the pressure of 1-20T, by diaphragm membrane and positive plate pressure by way of hot pressing
It is combined.
2. a kind of monomer-polymer lithium ion battery manufacturing method characterized by comprising
Positive plate manufacturing step, is used to prepare positive plate；
Negative electrode tab manufacturing step, is used to prepare negative electrode tab；
Diaphragm membrane manufacture piece is rapid, and for the diaphragm slurry of preparation to be coated on polyester film, diaphragm membrane is made；
Assembling steps, the assembling steps include:
Diaphragm membrane is fitted in the surface of positive plate；
Diaphragm membrane and positive plate are pressed together by way of hot pressing, the polyester in diaphragm membrane is torn off after cooling
Film；
It septate positive plate will be pressed is superimposed with negative electrode tab and is bonded together, obtain battery battery core；
Wherein, using 100~140 DEG C of temperature and the pressure of 1-20T, by diaphragm membrane and positive plate pressure by way of hot pressing
It is combined.
3. monomer-polymer lithium ion battery manufacturing method as claimed in claim 2, it is characterised in that: positive plate manufacturing step
Include:
Collector and collector processing slurry are prepared, the collector processing slurry includes at least conductive agent；By the collector
Processing slurry is coated on collection liquid surface；
Anode sizing agent is prepared, the anode sizing agent includes at least positive electrode active materials, conductive agent and positive polymer；
The anode sizing agent is coated on polyester film, positive diaphragm is obtained；
The positive diaphragm is bonded with the collector for being coated with collector processing slurry, by positive diaphragm by way of hot pressing
It is bonded together with collector, obtains positive plate；
Negative electrode tab manufacturing step includes:
Collector and collector processing slurry are prepared, the collector processing slurry includes at least conductive agent；By the collector
Processing slurry is coated on collection liquid surface；
Negative electrode slurry is prepared, the negative electrode slurry includes at least negative electrode active material, conductive agent and cathode polymer；
The negative electrode slurry is coated on polyester film, cathode membrane is obtained；
The cathode membrane is bonded with the collector for being coated with collector processing slurry, by cathode membrane by way of hot pressing
It is bonded together with collector, obtains negative electrode tab；
Diaphragm membrane manufactures piece
Diaphragm slurry is prepared, the diaphragm slurry includes at least insulating packing and membrane polymer；
The diaphragm slurry is applied on polyester film, to obtain diaphragm membrane.
4. monomer-polymer lithium ion battery manufacturing method as claimed in claim 3, which is characterized in that the anode polymerization
Object, cathode polymer and membrane polymer use Kynoar-hexafluoropropene copolymer.
5. monomer-polymer lithium ion battery manufacturing method as claimed in claim 3, it is characterised in that: plus plate current-collecting body processing
Slurry further includes binder；Plus plate current-collecting body is handled in slurry, and the mass fraction of conductive agent is 20%-60%, the matter of binder
Amount score is 40%-80%；
It further includes binder that negative current collector, which handles slurry,；In the collector processing slurry, the mass fraction of conductive agent is
20%-60%, the mass fraction of binder are 40%-80%.
6. monomer-polymer lithium ion battery manufacturing method as claimed in claim 5, which is characterized in that the anode sizing agent,
Negative electrode slurry and diaphragm slurry further include plasticizer.
7. monomer-polymer lithium ion battery manufacturing method as claimed in claim 6, it is characterised in that: prepare anode sizing agent
Step includes: that solvent is added in a reservoir；Positive polymer is added into solvent, is warming up to 30-45 DEG C, stirs 2~4 hours,
Plasticizer is added after the dissolution of positive polymer, is stirred 0.5~2 hour, conductive agent is then added, after stirring 2~4 hours,
Positive electrode active materials are added, stirs 4~6 hours, anode sizing agent is made；
The step of preparing diaphragm slurry includes: that solvent is added in a reservoir；Membrane polymer is added into solvent, is warming up to 30-
It 45 DEG C, stirs 2~4 hours, adds plasticizer after the dissolution of positive polymer, stir 0.5~2 hour, insulation is then added
Filler after stirring 0.5~2 hour, then grinds stirring 2~6 hours, diaphragm slurry is made；
The step of preparing negative electrode slurry includes: that solvent is added in a reservoir；Cathode polymer is added into solvent, is warming up to 30-
It 45 DEG C, stirs 2~4 hours, adds plasticizer after the dissolution of cathode polymer, stir 0.5~2 hour, be then added conductive
Agent adds negative electrode active material after stirring 2~4 hours, stirs 4~6 hours, negative electrode slurry is made.
8. monomer-polymer lithium ion battery manufacturing method as claimed in claim 7, it is characterised in that: anode sizing agent is made
Afterwards, it first by anode sizing agent after filter screen filtration, is coated on polyester film；Polyester film is torn off after Drying and cooling, with
To positive diaphragm；
After diaphragm slurry is made, first diaphragm slurry is coated after filter screen filtration on polyester film；Later by drying
Obtain diaphragm membrane；
After negative electrode slurry is made, first by negative electrode slurry after filter screen filtration, it is coated on polyester film；It is torn after Drying and cooling
From polyester film, to obtain cathode membrane.
9. monomer-polymer lithium ion battery manufacturing method as claimed in claim 8, which is characterized in that after assembling steps also
Including extraction step, extraction step includes: that the battery core of assembling is placed in extraction solution, to extract anode sizing agent, cathode slurry
Plasticizer in material and diaphragm slurry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610397905.6A CN105870489B (en) | 2016-06-07 | 2016-06-07 | Monomer-polymer lithium ion battery manufacturing method and its assemble method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610397905.6A CN105870489B (en) | 2016-06-07 | 2016-06-07 | Monomer-polymer lithium ion battery manufacturing method and its assemble method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105870489A CN105870489A (en) | 2016-08-17 |
| CN105870489B true CN105870489B (en) | 2019-03-01 |
Family
ID=56677216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610397905.6A Active CN105870489B (en) | 2016-06-07 | 2016-06-07 | Monomer-polymer lithium ion battery manufacturing method and its assemble method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105870489B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505187A (en) * | 2016-12-07 | 2017-03-15 | 辉能（天津）科技发展有限公司 | Slurry and the pole piece comprising the slurry, the preparation method of lithium ion battery cell |
| EP3401978B1 (en) * | 2017-05-09 | 2022-06-08 | Robert Bosch GmbH | Method for producing an electrode assembly for a battery cell |
| CN108550763A (en) * | 2018-03-16 | 2018-09-18 | 深圳市前海星火同为科技有限公司 | A kind of high capacity lithium ion battery diaphragm protection mechanism and operating system |
| CN109560244A (en) * | 2018-08-07 | 2019-04-02 | 深圳市电科电源股份有限公司 | Ferric phosphate lithium ion battery preparation method and ferric phosphate lithium ion battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1487617A (en) * | 2003-07-30 | 2004-04-07 | ��������ǿ��Դ�Ƽ�����˾ | Great-capacity polymer-lithium ion cell and its manufacture |
| CN101179122A (en) * | 2007-11-21 | 2008-05-14 | 万向集团公司 | Polymer power cell anode-cathode film |
| CN101232104A (en) * | 2007-01-22 | 2008-07-30 | 万向集团公司 | Method for manufacturing iron phosphate lithium power polymer lithium ion battery |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19820049C2 (en) * | 1998-05-05 | 2001-04-12 | Epcos Ag | Thermomechanical method for the planarization of a layer that can be structured using photo technology, in particular encapsulation for electronic components |
-
2016
- 2016-06-07 CN CN201610397905.6A patent/CN105870489B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1487617A (en) * | 2003-07-30 | 2004-04-07 | ��������ǿ��Դ�Ƽ�����˾ | Great-capacity polymer-lithium ion cell and its manufacture |
| CN101232104A (en) * | 2007-01-22 | 2008-07-30 | 万向集团公司 | Method for manufacturing iron phosphate lithium power polymer lithium ion battery |
| CN101179122A (en) * | 2007-11-21 | 2008-05-14 | 万向集团公司 | Polymer power cell anode-cathode film |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105870489A (en) | 2016-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101847513B (en) | Preparation process of long-lived negative pole piece and capacitor battery using negative pole piece | |
| CN102610830B (en) | Lithium ion battery | |
| CN104008893B (en) | The preparation method of lithium ion hybrid capacitors and lithium ion hybrid capacitors thereof | |
| CN113130838B (en) | Preparation method of multi-tab cell pole piece, multi-tab cell pole piece and multi-tab cell | |
| CN105870489B (en) | Monomer-polymer lithium ion battery manufacturing method and its assemble method | |
| CN101562079B (en) | Super-capacitor | |
| CN104078246A (en) | Lithium ion battery capacitor | |
| CN101847747A (en) | Lithium-ion battery pack | |
| CN109802094A (en) | A kind of low temperature ferric phosphate lithium cell and preparation method thereof | |
| CN113675365B (en) | Negative plate and lithium ion battery | |
| CN104599859A (en) | Lithium ion capacitor and manufacturing method thereof | |
| CN112133885B (en) | Battery core and secondary battery with three-layer pole piece structure | |
| CN114695968B (en) | Lithium ion battery with NP ratio less than 1 and preparation method thereof | |
| CN112701253B (en) | Pre-lithiation composite negative plate and preparation method and application thereof | |
| CN102214838A (en) | Lithium ion battery and preparation method thereof | |
| CN105932290A (en) | Unit high-capacity polymer lithium ion battery positive plate and production method thereof | |
| CN105958012A (en) | Single high-capacity polymer lithium ion battery negative plate and manufacturing method therefor | |
| CN113871567A (en) | Battery pole piece, preparation method and application thereof | |
| CN115763997A (en) | Winding type battery pole group and lithium ion battery | |
| CN105140523A (en) | Flexible thin film electrode material for lithium ion battery and preparing method of flexible thin film electrode material | |
| CN101217073A (en) | A mixed type polymer super capacitor | |
| CN102916161B (en) | Electrode composite material of a kind of lithium ion battery and preparation method thereof | |
| CN106410211A (en) | Porous state polymer lithium-ion battery and preparing method thereof | |
| CN105914322B (en) | The manufacturing method of monomer high capacity polymer lithium ion battery | |
| CN102916219B (en) | A kind of lithium ion battery cell and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |