CN109244326A - A kind of new energy car battery electric core membrane infiltration surface treatment method - Google Patents
A kind of new energy car battery electric core membrane infiltration surface treatment method Download PDFInfo
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- CN109244326A CN109244326A CN201811118324.XA CN201811118324A CN109244326A CN 109244326 A CN109244326 A CN 109244326A CN 201811118324 A CN201811118324 A CN 201811118324A CN 109244326 A CN109244326 A CN 109244326A
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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
- 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
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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
- 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
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
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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
- 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
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/44—Fibrous material
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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
- 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
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
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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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Abstract
The present invention discloses a kind of new energy car battery electric core membrane infiltration surface treatment method, comprising the following steps: prepares diaphragm, extracts diaphragm, prepare coating agent, dry diaphragm, coat diaphragm, prepare polyester fiber film, the unification of double films, infiltration processing and vacuum coating；Diaphragm is made by the mixing material by polypropylene and polyethylene in the present invention, compared to polypropylene more resistant to high temperature, compared to polyethylene more resistant to low temperature, it is compound along with polyester fiber film, thermal stability is stronger, with high temperature resistant, low temperature output, the charging cycle service life is long, the moderate feature of mechanical strength, and the effect that the present invention passes through extractant, it is extracted out convenient for the solable matter after forming a film, diaphragm is set to become microcellular structure, and the stretching action before and after compounding and process, make micropore more evenly, it is convenient for the transmission of electrolyte ion, permeability is stronger, the tensile strength and mechanical property of diaphragm are improved further through stretching, it is not easily broken.
Description
Technical field
The present invention relates to battery diaphragm process fields more particularly to a kind of new energy car battery electric core membrane to infiltrate surface
Processing method.
Background technique
In the structure of new energy battery, diaphragm is crucial one of interior layer assembly, and the performance of diaphragm determines the boundary of battery
Face structure, internal resistance etc. directly affect the characteristics such as capacity, circulation and the security performance of battery, and the diaphragm haveing excellent performance is to raising
The comprehensive performance of battery plays an important role, and the main function of diaphragm is to separate the positive and negative electrode of battery, prevents the two poles of the earth
Contact and it is short-circuit, additionally have the function of that electrolyte ion can be made to pass through, existing electric core membrane aperture is not uniform enough, gap
It is not suitable enough, the permeability of electrolyte ion is influenced, and existing electric core membrane generally uses polypropylene or polythene material,
High temperature resistance is not good enough, be easy to cause battery short circuit, meanwhile, existing electric core membrane is inadequate to the wetting property of electrolyte
Good, imbibition moisture-retaining capacity is poor, and inorganic ions is easy to be detached from from membrane surface, seriously affects the charge discharge life of battery, therefore,
The present invention proposes that a kind of new energy car battery electric core membrane infiltrates surface treatment method to solve existing in the prior art ask
Topic.
Summary of the invention
In view of the above-mentioned problems, the present invention proposes a kind of new energy car battery electric core membrane infiltration surface treatment method, it should
New energy car battery electric core membrane infiltrates surface treatment method.
To solve the above-mentioned problems, the present invention proposes a kind of new energy car battery electric core membrane infiltration surface treatment side
Method, comprising the following steps:
Step 1: diaphragm is prepared
Ready polypropylene and polyvinyl resin material are put into heater, are heated as molten condition, then
Mixture is put into blender, stirs 30-60 minutes, mixture is made, then mixture is laid on carrier, after cooling,
Crude diaphragm is squeezed into tablet press machine；
Step 2: extraction diaphragm
Diaphragm is put into reactive tank, it is impregnated with volatile extractant, impregnates 60-90 minutes, diaphragm is picked up,
It waits 10-20 minutes, micro-pore septum is made in be extracted dose of volatilization completely；
Step 3: coating agent is prepared
Coating agent includes following quality than ingredient: 30-50 parts of water, 5-10 parts of PVDF-HDF and 15-20 parts of acetone, by water,
PVDF-HDF and acetone, which are put into blender, to be stirred, and blender revolving speed is 35-70 rpms, mixing time 30-60
Minute, it is prepared into the coating processing agent that concentration is 2 percent；
Step 4: drying diaphragm
Micro-pore septum in step 2 is put into dryer, drying temperature is 30-40 degrees Celsius, dries 10-15 minutes, takes
Micro-pore septum out；
Step 5: coating diaphragm
The coating processing agent that step 3 is prepared is poured into the coating bucket in coating machine, the drying that will be obtained in step 4
Micro-pore septum afterwards is laid in the transmission road in coating machine, and coating processing agent is coated in the surface of micro-pore septum, coating speed
Degree is 5 meters per minute, and dryer is put into after coating, dries 5-10 minutes, delicate diaphragm is made；
Step 6: polyester fiber film is prepared
Polyester film includes following quality than ingredient: 30-60 parts of polyester, and 20-30 parts of celluloses add polyester film and cellulose
Heat mixes to be put into mixing machine after molten condition, and incorporation time is 40-50 minutes, by the cooling tablet press machine of mixture after mixing
It is squeezed into polyester fiber film；
Step 7: double film unifications
It is put into compaction laminating machine by delicate diaphragm manufactured in step 5 and with polyester fiber film manufactured in step 6, is controlled
Temperature processed is compacted delicate diaphragm and polyester fiber film, reinforcing diaphragm is made at 60-80 degrees Celsius；
Step 8: infiltration processing
Ethyl alcohol is imported into immersion slot, diaphragm tiling will be strengthened and be put into immersion slot, guarantees that ethyl alcohol liquid level is more than finished product diaphragm table
Face infiltrates 30-40 minutes；
Step 9: vacuum coating
Diaphragm will be strengthened and be put into dryer, dry 3-5 minutes, after cooling, be deposited using hall ion source and electron gun
The mode of inorganic nano silicon oxide film carries out vacuum coating processing to membrane surface, is wound after finished product diaphragm is made.
Further improvement lies in that: in the step 1, the thickness control of crude diaphragm is suppressed at 25 microns hereinafter, the step
In rapid five coating processing agent coat with a thickness of 1 micron.
Further improvement lies in that: in the step 1, the temperature of stirring is controlled at 30-40 degrees Celsius, and in step 1, cold
But temperature is controlled at 0-5 degrees Celsius.
Further improvement lies in that: in the step 3, first water and PVDF-HDF are put into blender and are stirred, stirred
Time is 10-20 minutes, and whipping temp is controlled at 30-40 degrees Celsius, and acetone is then added and is stirred, mixing time 25-
50 minutes, whipping temp was controlled at 30-40 degrees Celsius.
Further improvement lies in that: in the step 5, the temperature in transmission road is 80 degrees Celsius, the temperature control in dryer
System is at 10-20 degrees Celsius.
Further improvement lies in that: in the step 6, temperature when polyester and cellulose heating melting is 40 degrees Celsius, is mixed
It is 0 degree Celsius that the temperature of conjunction, which controls the temperature at 40-50 degrees Celsius, when cooling,.
Further improvement lies in that: in the step 2, after picking up the diaphragm after impregnating, it is carried out using stretching-machine
One-off drawing after to be extracted dose volatilizees completely, carries out second to diaphragm using stretching-machine and stretches.
Further improvement lies in that: in the step 6, the thickness control of polyester fiber film is 5-10 microns.
Further improvement lies in that: in the step 7, first delicate diaphragm and polyester fiber film are preheated before compacting, preheating temperature
At 40-50 degrees Celsius, and when compacting, the pressure of compaction laminating machine is controlled at 100-200 kPas for degree control.
Further improvement lies in that: in the step 9, the processing of vacuum coating twice, each Vacuum Deposition are carried out to membrane surface
Film with a thickness of 1 micron.
The invention has the benefit that diaphragm is made by the mixing material of polypropylene and polyethylene in the present invention, compared to
Polypropylene is more resistant to high temperature, and compared to polyethylene more resistant to low temperature, compound along with polyester fiber film, thermal stability is stronger, has
High temperature resistant, low temperature output, the feature that the charging cycle service life is long, mechanical strength is moderate, and the present invention are by the effect of extractant, just
Solable matter extraction after it will form a film, makes diaphragm become microcellular structure, and the stretching action before and after compounding and process, makes micropore
More evenly, that is, it is convenient for the transmission of electrolyte ion, permeability is stronger, and the tensile strength and mechanics of diaphragm are improved further through stretching
Performance is not easily broken, and spatial stability is high, improves battery yields, meanwhile, the present invention passes through the effect of coating processing agent, increases
The strong stability of diaphragm, then the infiltration of ethyl alcohol is cooperated to handle, the wellability between diaphragm and electrolyte is further improved, and
And imbibition moisture-retaining capacity is strong, so that the cycle performance of battery entirety and security performance is had raising by a relatively large margin, in addition, of the invention
After the inorganic nano silicon oxide film surface treatment that diaphragm is deposited through electron gun, the thermal stability of diaphragm has also obtained significantly mentioning
Height must reduce the thickness of diaphragm, planarization is more preferable finally, the present invention is repeatedly suppressed using compacting machine as far as possible.
Specific embodiment
In order to realize invention technological means, reach purpose and effect is easy to understand, below with reference to specific implementation
Mode, the present invention is further explained.
Embodiment one
A kind of new energy car battery electric core membrane infiltration surface treatment method
Step 1: diaphragm is prepared
Ready polypropylene and polyvinyl resin material are put into heater, are heated as molten condition, then
Mixture is put into blender, is stirred 40 minutes, the temperature of stirring is 40 degrees Celsius, mixture is made, then mixture is tiled
On carrier, after cooling, cooling temperature is 3 degrees Celsius, is squeezed into crude diaphragm with tablet press machine, suppresses crude diaphragm
With a thickness of 25 microns；
Step 2: extraction diaphragm
Diaphragm is put into reactive tank, it is impregnated with volatile extractant, impregnates 70 minutes, diaphragm is picked up, is made
One-off drawing is carried out to it with stretching-machine, is waited 15 minutes, and to be extracted dose of volatilization completely carries out second to diaphragm using stretching-machine
Secondary stretching, is made micro-pore septum；
Step 3: coating agent is prepared
Coating agent includes following quality than ingredient: 30 parts of water, 5 parts of PVDF-HDF and 15 part of acetone, first by water and PVDF-
HDF is put into blender and is stirred, and mixing time is 10-20 minutes, and whipping temp control is 40 degrees Celsius, is then added third
Ketone is stirred, and mixing time is 30 minutes, and whipping temp is 40 degrees Celsius, and blender revolving speed is 50 rpms, is prepared into
The coating processing agent that concentration is 2 percent；
Step 4: drying diaphragm
Micro-pore septum in step 2 is put into dryer, drying temperature is 35 degrees Celsius, dries 15 minutes, takes out micropore
Diaphragm；
Step 5: coating diaphragm
The coating processing agent that step 3 is prepared is poured into the coating bucket in coating machine, the drying that will be obtained in step 4
Micro-pore septum afterwards is laid in the transmission road in coating machine, and the temperature in transmission road is 80 degrees Celsius, and coating processing agent is applied
Overlay on the surface of micro-pore septum, coating speed is 5 meters per minute, coating processing agent coating with a thickness of 1 micron, be put into after coating
Dryer, the temperature in dryer are 15 degrees Celsius, dry 8 minutes, delicate diaphragm is made；
Step 6: polyester fiber film is prepared
Polyester film includes following quality than ingredient: 30 parts of polyester, and polyester film and cellulose are heated to be molten by 20 parts of celluloses
Melt to be put into mixing machine after state and mix, temperature when polyester and cellulose heating melting is 40 degrees Celsius, mixed temperature control
For system at 45 degrees Celsius, incorporation time is 45 minutes, and after mixing that mixture is cooling, temperature when cooling is 0 degree Celsius, then with pressing
Piece machine is squeezed into polyester fiber film, and the thickness control of polyester fiber film is 8 microns；
Step 7: double film unifications
First delicate diaphragm and polyester fiber film are preheated, preheating temperature is controlled at 45 degrees Celsius, then will be made in step 5
Delicate diaphragm and be put into compaction laminating machine with polyester fiber film manufactured in step 6, control temperature at 70 degrees Celsius, compacting
Delicate diaphragm and polyester fiber film, when compacting, the pressure of compaction laminating machine is controlled at 150 kPas, and reinforcing diaphragm is made；
Step 8: infiltration processing
Ethyl alcohol is imported into immersion slot, diaphragm tiling will be strengthened and be put into immersion slot, guarantees that ethyl alcohol liquid level is more than finished product diaphragm table
Face infiltrates 35 minutes；
Step 9: vacuum coating
Diaphragm will be strengthened and be put into dryer, dry 4 minutes, after cooling, nothing is deposited using hall ion source and electron gun
The mode of the nano oxidized silicon thin film of machine, to membrane surface carry out vacuum coating twice processing, each vacuum coating it is micro- with a thickness of 1
Rice, is wound after finished product diaphragm is made.
Embodiment two
A kind of new energy car battery electric core membrane infiltration surface treatment method
Step 1: diaphragm is prepared
Ready polypropylene and polyvinyl resin material are put into heater, are heated as molten condition, then
Mixture is put into blender, is stirred 40 minutes, the temperature of stirring is 40 degrees Celsius, mixture is made, then mixture is tiled
On carrier, after cooling, cooling temperature is 3 degrees Celsius, is squeezed into crude diaphragm with tablet press machine, suppresses crude diaphragm
With a thickness of 25 microns；
Step 2: extraction diaphragm
Diaphragm is put into reactive tank, it is impregnated with volatile extractant, impregnates 70 minutes, diaphragm is picked up, is made
One-off drawing is carried out to it with stretching-machine, is waited 15 minutes, and to be extracted dose of volatilization completely carries out second to diaphragm using stretching-machine
Secondary stretching, is made micro-pore septum；
Step 3: coating agent is prepared
Coating agent includes following quality than ingredient: 50 parts of water, 10 parts of PVDF-HDF and 20 part of acetone, first by water and PVDF-
HDF is put into blender and is stirred, and mixing time is 10-20 minutes, and whipping temp control is 40 degrees Celsius, is then added third
Ketone is stirred, and mixing time is 30 minutes, and whipping temp is 40 degrees Celsius, and blender revolving speed is 50 rpms, is prepared into
The coating processing agent that concentration is 2 percent；
Step 4: drying diaphragm
Micro-pore septum in step 2 is put into dryer, drying temperature is 35 degrees Celsius, dries 15 minutes, takes out micropore
Diaphragm；
Step 5: coating diaphragm
The coating processing agent that step 3 is prepared is poured into the coating bucket in coating machine, the drying that will be obtained in step 4
Micro-pore septum afterwards is laid in the transmission road in coating machine, and the temperature in transmission road is 80 degrees Celsius, and coating processing agent is applied
Overlay on the surface of micro-pore septum, coating speed is 5 meters per minute, coating processing agent coating with a thickness of 1 micron, be put into after coating
Dryer, the temperature in dryer are 15 degrees Celsius, dry 8 minutes, delicate diaphragm is made；
Step 6: polyester fiber film is prepared
Polyester film includes following quality than ingredient: 30 parts of polyester, and polyester film and cellulose are heated to be molten by 20 parts of celluloses
Melt to be put into mixing machine after state and mix, temperature when polyester and cellulose heating melting is 40 degrees Celsius, mixed temperature control
For system at 45 degrees Celsius, incorporation time is 45 minutes, and after mixing that mixture is cooling, temperature when cooling is 0 degree Celsius, then with pressing
Piece machine is squeezed into polyester fiber film, and the thickness control of polyester fiber film is 8 microns；
Step 7: double film unifications
First delicate diaphragm and polyester fiber film are preheated, preheating temperature is controlled at 45 degrees Celsius, then will be made in step 5
Delicate diaphragm and be put into compaction laminating machine with polyester fiber film manufactured in step 6, control temperature at 70 degrees Celsius, compacting
Delicate diaphragm and polyester fiber film, when compacting, the pressure of compaction laminating machine is controlled at 150 kPas, and reinforcing diaphragm is made；
Step 8: infiltration processing
Ethyl alcohol is imported into immersion slot, diaphragm tiling will be strengthened and be put into immersion slot, guarantees that ethyl alcohol liquid level is more than finished product diaphragm table
Face infiltrates 35 minutes；
Step 9: vacuum coating
Diaphragm will be strengthened and be put into dryer, dry 4 minutes, after cooling, nothing is deposited using hall ion source and electron gun
The mode of the nano oxidized silicon thin film of machine, to membrane surface carry out vacuum coating twice processing, each vacuum coating it is micro- with a thickness of 1
Rice, is wound after finished product diaphragm is made.
Embodiment three
A kind of new energy car battery electric core membrane infiltration surface treatment method
Step 1: diaphragm is prepared
Ready polypropylene and polyvinyl resin material are put into heater, are heated as molten condition, then
Mixture is put into blender, is stirred 40 minutes, the temperature of stirring is 40 degrees Celsius, mixture is made, then mixture is tiled
On carrier, after cooling, cooling temperature is 3 degrees Celsius, is squeezed into crude diaphragm with tablet press machine, suppresses crude diaphragm
With a thickness of 25 microns；
Step 2: extraction diaphragm
Diaphragm is put into reactive tank, it is impregnated with volatile extractant, impregnates 70 minutes, diaphragm is picked up, is made
One-off drawing is carried out to it with stretching-machine, is waited 15 minutes, and to be extracted dose of volatilization completely carries out second to diaphragm using stretching-machine
Secondary stretching, is made micro-pore septum；
Step 3: coating agent is prepared
Coating agent includes following quality than ingredient: 50 parts of water, 10 parts of PVDF-HDF and 20 part of acetone, first by water and PVDF-
HDF is put into blender and is stirred, and mixing time is 10-20 minutes, and whipping temp control is 40 degrees Celsius, is then added third
Ketone is stirred, and mixing time is 30 minutes, and whipping temp is 40 degrees Celsius, and blender revolving speed is 50 rpms, is prepared into
The coating processing agent that concentration is 2 percent；
Step 4: drying diaphragm
Micro-pore septum in step 2 is put into dryer, drying temperature is 35 degrees Celsius, dries 15 minutes, takes out micropore
Diaphragm；
Step 5: coating diaphragm
The coating processing agent that step 3 is prepared is poured into the coating bucket in coating machine, the drying that will be obtained in step 4
Micro-pore septum afterwards is laid in the transmission road in coating machine, and the temperature in transmission road is 80 degrees Celsius, and coating processing agent is applied
Overlay on the surface of micro-pore septum, coating speed is 5 meters per minute, coating processing agent coating with a thickness of 1 micron, be put into after coating
Dryer, the temperature in dryer are 15 degrees Celsius, dry 8 minutes, delicate diaphragm is made；
Step 6: polyester fiber film is prepared
Polyester film includes following quality than ingredient: 60 parts of polyester, and polyester film and cellulose are heated to be molten by 30 parts of celluloses
Melt to be put into mixing machine after state and mix, temperature when polyester and cellulose heating melting is 40 degrees Celsius, mixed temperature control
For system at 45 degrees Celsius, incorporation time is 45 minutes, and after mixing that mixture is cooling, temperature when cooling is 0 degree Celsius, then with pressing
Piece machine is squeezed into polyester fiber film, and the thickness control of polyester fiber film is 8 microns；
Step 7: double film unifications
First delicate diaphragm and polyester fiber film are preheated, preheating temperature is controlled at 45 degrees Celsius, then will be made in step 5
Delicate diaphragm and be put into compaction laminating machine with polyester fiber film manufactured in step 6, control temperature at 70 degrees Celsius, compacting
Delicate diaphragm and polyester fiber film, when compacting, the pressure of compaction laminating machine is controlled at 150 kPas, and reinforcing diaphragm is made；
Step 8: infiltration processing
Ethyl alcohol is imported into immersion slot, diaphragm tiling will be strengthened and be put into immersion slot, guarantees that ethyl alcohol liquid level is more than finished product diaphragm table
Face infiltrates 35 minutes；
Step 9: vacuum coating
Diaphragm will be strengthened and be put into dryer, dry 4 minutes, after cooling, nothing is deposited using hall ion source and electron gun
The mode of the nano oxidized silicon thin film of machine, to membrane surface carry out vacuum coating twice processing, each vacuum coating it is micro- with a thickness of 1
Rice, is wound after finished product diaphragm is made.
It can be concluded that, in the present invention, composition is compared by quality according to embodiment one and embodiment two are as follows: 30-50 parts of water,
The coating processing agent that 5-10 parts of PVDF-HDF and 15-20 parts of acetone are prepared can preferably enhance the stability of diaphragm.
It can be concluded that, in the present invention, composition is compared by quality according to embodiment two and embodiment three are as follows: 30-60 parts poly-
Ester, polyester fiber film made of 20-30 parts of celluloses can preferably enhance the thermal stability of diaphragm.
Diaphragm is made by the mixing material of polypropylene and polyethylene in the present invention, compared to polypropylene more resistant to high temperature, compares
In polyethylene more resistant to low temperature, compound along with polyester fiber film, thermal stability is stronger, has high temperature resistant, low temperature output, charging
It has extended cycle life, the feature that mechanical strength is moderate, and the present invention is by the effect of extractant, convenient for the soluble object after forming a film
Matter extraction makes diaphragm become microcellular structure, and the stretching action before and after compounding and process, makes micropore more evenly, that is, is convenient for electrolyte
The transmission of ion, permeability is stronger, further through the tensile strength and mechanical property for improving diaphragm is stretched, is not easily broken, space
Stability is high, improves battery yields, meanwhile, the present invention passes through the effect of coating processing agent, the stability of diaphragm is enhanced, then
The infiltration processing for cooperating ethyl alcohol, further improves the wellability between diaphragm and electrolyte, and imbibition moisture-retaining capacity is strong, makes
The cycle performance and security performance of battery entirety have raising by a relatively large margin, in addition, what diaphragm of the present invention was deposited through electron gun
After the surface treatment of inorganic nano silicon oxide film, the thermal stability of diaphragm has also obtained significant raising, finally, the present invention uses
Compacting machine is repeatedly suppressed, and must reduce the thickness of diaphragm as far as possible, and planarization is more preferable.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (10)
1. a kind of new energy car battery electric core membrane infiltrates surface treatment method, it is characterised in that: the following steps are included:
Step 1: diaphragm is prepared
Ready polypropylene and polyvinyl resin material are put into heater, is heated as molten condition, then will mix
It closes object and is put into blender, stir 30-60 minutes, mixture is made, then mixture is laid on carrier, after cooling, with pressure
Piece machine is squeezed into crude diaphragm；
Step 2: extraction diaphragm
Diaphragm is put into reactive tank, it is impregnated with volatile extractant, impregnates 60-90 minutes, diaphragm is picked up, is waited
10-20 minutes, micro-pore septum was made in be extracted dose of volatilization completely；
Step 3: coating agent is prepared
Coating agent includes following quality than ingredient: 30-50 parts of water, 5-10 parts of PVDF-HDF and 15-20 parts of acetone, by water, PVDF-
HDF and acetone, which are put into blender, to be stirred, and blender revolving speed is 35-70 rpms, and mixing time is 30-60 minutes,
It is prepared into the coating processing agent that concentration is 2 percent；
Step 4: drying diaphragm
Micro-pore septum in step 2 is put into dryer, drying temperature is 30-40 degrees Celsius, dries 10-15 minutes, takes out micro-
Hole diaphragm；
Step 5: coating diaphragm
The coating processing agent that step 3 is prepared is poured into the coating bucket in coating machine, after the drying obtained in step 4
Micro-pore septum is laid in the transmission road in coating machine, and coating processing agent is coated in the surface of micro-pore septum, and coating speed is
5 meters per minute, it is put into dryer after coating, dries 5-10 minutes, delicate diaphragm is made；
Step 6: polyester fiber film is prepared
Polyester film includes following quality than ingredient: 30-60 parts of polyester, and polyester film and cellulose are heated to be by 20-30 parts of celluloses
It is put into mixing machine and mixes after molten condition, incorporation time is 40-50 minutes, squeezes mixture cooling with tablet press machine after mixing
At polyester fiber film；
Step 7: double film unifications
Compaction laminating machine, control temperature are put by delicate diaphragm manufactured in step 5 and with polyester fiber film manufactured in step 6
Degree is compacted delicate diaphragm and polyester fiber film, reinforcing diaphragm is made at 60-80 degrees Celsius；
Step 8: infiltration processing
Ethyl alcohol is imported into immersion slot, diaphragm tiling will be strengthened and be put into immersion slot, guarantees that ethyl alcohol liquid level is more than to strengthen membrane surface, leaching
Profit 30-40 minutes；
Step 9: vacuum coating
Diaphragm will be strengthened and be put into dryer, dried 3-5 minutes, it is after cooling, inorganic using hall ion source and electron gun vapor deposition
The mode of nano oxidized silicon thin film carries out vacuum coating processing to membrane surface, is wound after finished product diaphragm is made.
2. a kind of new energy car battery electric core membrane according to claim 1 infiltrates surface treatment method, feature exists
In: in the step 1, the thickness control of crude diaphragm is suppressed at 25 microns hereinafter, coating processing agent coats in the step 5
With a thickness of 1 micron.
3. a kind of new energy car battery electric core membrane according to claim 1 infiltrates surface treatment method, feature exists
In: in the step 1, the temperature of stirring is controlled at 30-40 degrees Celsius, and in step 1, and cooling temperature control is taken the photograph in 0-5
Family name's degree.
4. a kind of new energy car battery electric core membrane according to claim 1 infiltrates surface treatment method, feature exists
In: in the step 3, first water and PVDF-HDF are put into blender and are stirred, mixing time is 10-20 minutes, stirring
Temperature is controlled at 30-40 degrees Celsius, and acetone is then added and is stirred, and mixing time is 25-50 minutes, and whipping temp control exists
30-40 degrees Celsius.
5. a kind of new energy car battery electric core membrane according to claim 1 infiltrates surface treatment method, feature exists
In: in the step 5, the temperature in transmission road is 80 degrees Celsius, and the temperature in dryer is controlled at 10-20 degrees Celsius.
6. a kind of new energy car battery electric core membrane according to claim 1 infiltrates surface treatment method, feature exists
In: in the step 6, temperature when polyester and cellulose heating melting is 40 degrees Celsius, and mixed temperature is controlled in 40-50
Degree Celsius, temperature when cooling is 0 degree Celsius.
7. a kind of new energy car battery electric core membrane according to claim 1 infiltrates surface treatment method, feature exists
In: in the step 2, after picking up the diaphragm after impregnating, one-off drawing is carried out to it using stretching-machine, to be extracted dose is complete
After full volatilization, second is carried out to diaphragm using stretching-machine and is stretched.
8. a kind of new energy car battery electric core membrane according to claim 1 infiltrates surface treatment method, feature exists
In: in the step 6, the thickness control of polyester fiber film is 5-10 microns.
9. a kind of new energy car battery electric core membrane according to claim 1 infiltrates surface treatment method, feature exists
In: in the step 7, first delicate diaphragm and polyester fiber film are preheated before compacting, preheating temperature is controlled at 40-50 degrees Celsius,
And when being compacted, the pressure of compaction laminating machine is controlled at 100-200 kPas.
10. a kind of new energy car battery electric core membrane according to claim 1 infiltrates surface treatment method, feature exists
In: in the step 9, to membrane surface carry out vacuum coating twice processing, each vacuum coating with a thickness of 1 micron.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111370623A (en) * | 2020-03-18 | 2020-07-03 | 江苏厚生新能源科技有限公司 | Alumina ceramic diaphragm, preparation method thereof, powder, ceramic slurry and lithium battery |
| CN112490582A (en) * | 2020-10-30 | 2021-03-12 | 河北金力新能源科技股份有限公司 | High-mechanical-strength high-toughness diaphragm and preparation method thereof |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069831A (en) * | 1991-07-05 | 1993-03-10 | 旭化成工业株式会社 | Adopt the employed division board of battery and the manufacture method thereof of organic electrolyte |
| CN102916150A (en) * | 2012-11-02 | 2013-02-06 | 江苏科技大学 | Preparation method of high-temperature-resisting battery diaphragm |
| CN103972451A (en) * | 2014-05-21 | 2014-08-06 | 北京印刷学院 | Surface modification treatment method of battery diaphragm |
| KR20150099648A (en) * | 2014-02-21 | 2015-09-01 | 주식회사 포스코 | Separator, method of manufacturing the same, lithium polymer secondary battery including the same, and method of manufacturing lithium polymer secondary battery using the same |
| CN106299195A (en) * | 2015-06-01 | 2017-01-04 | 龙能科技（苏州）有限公司 | The preparation method of barrier film and lithium ion battery |
| CN106654128A (en) * | 2017-01-18 | 2017-05-10 | 宁德新能源科技有限公司 | Secondary battery |
| CN106784535A (en) * | 2017-01-20 | 2017-05-31 | 东莞市卓高电子科技有限公司 | The preparation method of environmental protection breathable type lithium battery inner septum |
| CN106953050A (en) * | 2017-02-13 | 2017-07-14 | 河北金力新能源科技股份有限公司 | A kind of high temperature resistance multilayer barrier film composite lithium ion cell barrier film and preparation method thereof |
| CN107216472A (en) * | 2017-05-25 | 2017-09-29 | 华南理工大学 | A kind of high-fire resistance composite diaphragm for lithium battery and preparation method thereof |
| CN108134032A (en) * | 2016-12-01 | 2018-06-08 | 中国科学院大连化学物理研究所 | A kind of lithium ion battery polyether-ether-ketone porous septum and its preparation and application |
| CN108155327A (en) * | 2017-12-11 | 2018-06-12 | 广州鹏辉能源科技股份有限公司 | Septum for lithium ion battery, preparation method and lithium ion battery |
| CN108172737A (en) * | 2016-12-07 | 2018-06-15 | 中南大学 | A kind of preparation method of lithium ion battery polymer diaphragm |
| CN108172742A (en) * | 2017-12-27 | 2018-06-15 | 桂林电器科学研究院有限公司 | Preparation method of polyimide modified composite battery separator film and products thereof |
-
2018
- 2018-09-20 CN CN201811118324.XA patent/CN109244326A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069831A (en) * | 1991-07-05 | 1993-03-10 | 旭化成工业株式会社 | Adopt the employed division board of battery and the manufacture method thereof of organic electrolyte |
| CN102916150A (en) * | 2012-11-02 | 2013-02-06 | 江苏科技大学 | Preparation method of high-temperature-resisting battery diaphragm |
| KR20150099648A (en) * | 2014-02-21 | 2015-09-01 | 주식회사 포스코 | Separator, method of manufacturing the same, lithium polymer secondary battery including the same, and method of manufacturing lithium polymer secondary battery using the same |
| CN103972451A (en) * | 2014-05-21 | 2014-08-06 | 北京印刷学院 | Surface modification treatment method of battery diaphragm |
| CN106299195A (en) * | 2015-06-01 | 2017-01-04 | 龙能科技（苏州）有限公司 | The preparation method of barrier film and lithium ion battery |
| CN108134032A (en) * | 2016-12-01 | 2018-06-08 | 中国科学院大连化学物理研究所 | A kind of lithium ion battery polyether-ether-ketone porous septum and its preparation and application |
| CN108172737A (en) * | 2016-12-07 | 2018-06-15 | 中南大学 | A kind of preparation method of lithium ion battery polymer diaphragm |
| CN106654128A (en) * | 2017-01-18 | 2017-05-10 | 宁德新能源科技有限公司 | Secondary battery |
| CN106784535A (en) * | 2017-01-20 | 2017-05-31 | 东莞市卓高电子科技有限公司 | The preparation method of environmental protection breathable type lithium battery inner septum |
| CN106953050A (en) * | 2017-02-13 | 2017-07-14 | 河北金力新能源科技股份有限公司 | A kind of high temperature resistance multilayer barrier film composite lithium ion cell barrier film and preparation method thereof |
| CN107216472A (en) * | 2017-05-25 | 2017-09-29 | 华南理工大学 | A kind of high-fire resistance composite diaphragm for lithium battery and preparation method thereof |
| CN108155327A (en) * | 2017-12-11 | 2018-06-12 | 广州鹏辉能源科技股份有限公司 | Septum for lithium ion battery, preparation method and lithium ion battery |
| CN108172742A (en) * | 2017-12-27 | 2018-06-15 | 桂林电器科学研究院有限公司 | Preparation method of polyimide modified composite battery separator film and products thereof |
Non-Patent Citations (1)
| Title |
|---|
| 王金良、胡信国、徐保伯、黄学杰、余国华等: "《中国电池工业20年》", 30 June 2009 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111370623A (en) * | 2020-03-18 | 2020-07-03 | 江苏厚生新能源科技有限公司 | Alumina ceramic diaphragm, preparation method thereof, powder, ceramic slurry and lithium battery |
| CN111370623B (en) * | 2020-03-18 | 2022-03-15 | 江苏厚生新能源科技有限公司 | Alumina ceramic diaphragm, preparation method thereof, powder, ceramic slurry and lithium battery |
| CN112490582A (en) * | 2020-10-30 | 2021-03-12 | 河北金力新能源科技股份有限公司 | High-mechanical-strength high-toughness diaphragm and preparation method thereof |
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