CN117680057A - Battery heat insulation sheet for lithium battery and manufacturing process thereof - Google Patents
Battery heat insulation sheet for lithium battery and manufacturing process thereof Download PDFInfo
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- CN117680057A CN117680057A CN202311680141.8A CN202311680141A CN117680057A CN 117680057 A CN117680057 A CN 117680057A CN 202311680141 A CN202311680141 A CN 202311680141A CN 117680057 A CN117680057 A CN 117680057A
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- coagulated
- heat insulation
- aerogel
- autoclave
- solution
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- 238000009413 insulation Methods 0.000 title claims abstract description 35
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 239000004964 aerogel Substances 0.000 claims abstract description 42
- 239000012535 impurity Substances 0.000 claims abstract description 29
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000741 silica gel Substances 0.000 claims abstract description 21
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 21
- 238000004806 packaging method and process Methods 0.000 claims abstract description 18
- 239000002131 composite material Substances 0.000 claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000000835 fiber Substances 0.000 claims abstract 4
- 239000005022 packaging material Substances 0.000 claims abstract 4
- 230000004888 barrier function Effects 0.000 claims abstract 2
- 239000000919 ceramic Substances 0.000 claims abstract 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims abstract 2
- 239000004744 fabric Substances 0.000 claims abstract 2
- 239000012188 paraffin wax Substances 0.000 claims abstract 2
- 239000000049 pigment Substances 0.000 claims abstract 2
- 239000002904 solvent Substances 0.000 claims abstract 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 117
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 64
- 239000007787 solid Substances 0.000 claims description 59
- 239000000243 solution Substances 0.000 claims description 34
- 239000001569 carbon dioxide Substances 0.000 claims description 32
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 32
- 238000002360 preparation method Methods 0.000 claims description 21
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 claims description 18
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 13
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 13
- 238000005520 cutting process Methods 0.000 claims description 12
- 238000005498 polishing Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000013329 compounding Methods 0.000 claims description 8
- 239000011159 matrix material Substances 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 239000003973 paint Substances 0.000 claims description 6
- 238000004080 punching Methods 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 5
- 238000007654 immersion Methods 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims 2
- 229910021529 ammonia Inorganic materials 0.000 claims 1
- 239000007864 aqueous solution Substances 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 239000000758 substrate Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 239000000499 gel Substances 0.000 abstract description 6
- 238000002474 experimental method Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000220479 Acacia Species 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 235000010643 Leucaena leucocephala Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 210000004905 finger nail Anatomy 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 230000002522 swelling effect Effects 0.000 description 1
- 230000009974 thixotropic effect Effects 0.000 description 1
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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/0091—Preparation of aerogels, e.g. xerogels
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Primary Cells (AREA)
- Silicon Compounds (AREA)
Abstract
The invention relates to the technical field of battery heat insulation sheets, in particular to a battery heat insulation sheet for lithium batteries and a manufacturing process thereof. The heat insulation sheet comprises a cover plate, a fireproof cover, an electric core, a heat conduction plate, side barrier strips, ceramic fiber cloth and packaging materials, wherein the outer surface of the fireproof cover is coated with expansion type fireproof materials, the packaging materials comprise PI films and packaging silica gel frames, and the expansion type fireproof coating comprises ethyl fibers, chlorinated paraffin, fireproof pigments and solvents, so that the purposes of completely removing impurities in gel gaps before aerogel is completely formed and improving the heat insulation effect of the aerogel and aerogel composite materials are achieved.
Description
Technical Field
The invention relates to the technical field of battery heat insulation sheets, in particular to a battery heat insulation sheet for lithium batteries and a manufacturing process thereof.
Background
Aerogel is a nano-scale porous solid material formed by replacing liquid phase in gel with gas by a certain drying mode through a sol-gel method, and has the characteristics of gel property, such as swelling effect, thixotropic effect, slurry separation effect and the like, such as gelatin, acacia, silica gel, hair, fingernails and the like.
In the prior art, an aerogel is being used as a heat insulation sheet of a main heat insulation material and gradually becomes a main stream of a lithium battery trolley, but the strength of an aerogel body material is lower, the brittleness is higher, the aerogel body material is easy to crack when impacted and cannot block the thermal failure of a single battery, the stability of the material needs to be increased by compounding with a base material, in the compounding process, the aerogel can generate gaps, the gaps are an important reason for the excellent heat insulation effect of the aerogel, impurities of the gaps can not be sufficiently removed in part of production, and the heat insulation effect of the aerogel impurities is reduced.
Disclosure of Invention
The aerogel can generate gaps, and impurities in the gaps can not be removed sufficiently in part of production, so that the heat insulation effect of the aerogel impurities is reduced.
Aiming at the defects of the prior art, the invention provides a manufacturing process of a battery heat insulation sheet for lithium batteries, which comprises the following steps:
step one: the preparation method comprises the following steps of: 100-150 parts of methyl silicate, 150-225 parts of methanol, 0.6-1 part of concentrated ammonia water and 25-75 parts of water, taking out the methyl silicate and the methanol, placing the methyl silicate and the methanol in a container, stirring to obtain a mixed solution, adding water and the concentrated ammonia water for secondary stirring after the solution is fully mixed to obtain a solution to be coagulated, compounding the solution to be coagulated with a matrix, and standing the compounded composite material until the solution to be coagulated in a mold is thoroughly coagulated to form a coagulated solid;
step two: cleaning impurities during preparation, taking out the coagulated solids, placing and immersing the coagulated solids in pure methanol, taking out the coagulated solids after immersing and removing impurities, standing the taken coagulated solids for 10 minutes, replacing methanol solution, and then repeatedly immersing and removing impurities on the coagulated solids;
step three: the preparation method comprises the steps of (1) pressurizing aerogel to finish preparation, putting cleaned coagulated solids into an autoclave, closing a feed inlet, connecting a communicating pipe outside the autoclave, inputting liquid carbon dioxide into the autoclave through the connecting pipe, heating and pressurizing the inside of the autoclave until the carbon dioxide reaches a supercritical state when the autoclave works, replacing methanol in gaps of the coagulated solids with the carbon dioxide in the supercritical state, taking out aerogel after the reaction is finished, standing for 1 hour, waiting for volatilizing carbon dioxide in the aerogel to an atmosphere environment, and filling gaps of the carbon dioxide with air in the atmosphere environment at the moment to obtain aerogel solids;
step four: cutting and packaging, namely cutting according to the size of a frame of a packaged silica gel frame, filling the silica gel frame, coating a film, packaging, punching holes on the silica gel frame, mounting a cover plate, spraying expansion type fireproof paint on the cover plate, and obtaining a battery heat insulation sheet, and waiting for product appearance detection;
step five: observing and polishing, observing the appearance of the formed heat insulation sheet, and polishing and repairing the position with burrs.
The beneficial effects of the invention are as follows:
in the aerogel preparation process, repeatedly immersing in methanol to enable methanol to fill gaps in gel, precipitating internal impurities, filling gaps of gel before molding with formaldehyde, completely replacing gaps of gel with methanol through supercritical carbon dioxide, and vacating the previously filled gaps through physical properties of carbon dioxide after aerogel molding, so that the prepared aerogel has a better heat insulation effect.
Drawings
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a graph of a temperature differential test control for performance detection in the present invention.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description. The embodiments of the invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Example 1
Step one: the preparation method comprises the following steps of: 100-150 parts of methyl silicate, 150-225 parts of methanol, 0.6-1 part of concentrated ammonia water and 25-75 parts of water, taking out the methyl silicate and the methanol, placing the methyl silicate and the methanol in a container, stirring to obtain a mixed solution, adding the water and the concentrated ammonia water for secondary stirring after the solution is fully mixed, obtaining a solution to be coagulated, compounding the solution to be coagulated with a matrix, and standing the compounded composite material until the solution to be coagulated is thoroughly coagulated in a mold to form a coagulated solid.
Further, the composite matrix is glass fiber.
Further, the standing time was 24 hours.
Step two: cleaning impurities during preparation, taking out the coagulated solids, placing and immersing the coagulated solids in pure methanol, taking out the coagulated solids after immersing and removing impurities, standing the taken coagulated solids for 10 minutes and replacing a methanol solution, and then repeatedly immersing and removing impurities on the coagulated solids.
Further, the number of submergions was set to 10.
Further, the single immersion time period was set to 360 minutes.
Step three: the preparation is accomplished in aerogel pressurization, put into the autoclave with the solid that condenses after the clearance, the back is closed the pan feeding mouth, autoclave external connection has communicating pipe, with liquid carbon dioxide through the connecting pipe input autoclave in, during the autoclave work, the inside heating pressurization of autoclave can reach supercritical state until carbon dioxide, supercritical state's carbon dioxide replaces the methyl alcohol in the solid gap that condenses, take out the aerogel after the reaction is accomplished, stand for 1 hour and wait for carbon dioxide volatilize to atmospheric environment in the aerogel, the gap that the air in the atmospheric environment will be filled carbon dioxide before this moment is located, obtain aerogel solid.
Further, the pressure applied in the autoclave was 10MPa.
Step four: cutting and packaging, namely cutting according to the size of the frame of the packaging silica gel frame, packaging the frame with the silica gel frame, then coating the frame with a film, punching holes on the silica gel frame, installing a cover plate, spraying expansion type fireproof paint on the cover plate, and obtaining the battery heat insulation sheet, and waiting for product appearance detection.
Step five: observing and polishing, observing the appearance of the formed heat insulation sheet, and polishing and repairing the position with burrs.
Example two
Step one: the preparation method comprises the following steps of: 100-150 parts of methyl silicate, 150-225 parts of methanol, 0.6-1 part of concentrated ammonia water and 25-75 parts of water, taking out the methyl silicate and the methanol, placing the methyl silicate and the methanol in a container, stirring to obtain a mixed solution, adding the water and the concentrated ammonia water for secondary stirring after the solution is fully mixed, obtaining a solution to be coagulated, compounding the solution to be coagulated with a matrix, and standing the compounded composite material until the solution to be coagulated is thoroughly coagulated in a mold to form a coagulated solid.
Further, the composite matrix is glass fiber.
Further, the standing time was 24 hours.
Step two: cleaning impurities during preparation, taking out the coagulated solids, placing and immersing the coagulated solids in pure methanol, taking out the coagulated solids after immersing and removing impurities, standing the taken coagulated solids for 10 minutes and replacing a methanol solution, and then repeatedly immersing and removing impurities on the coagulated solids.
Furthermore, the impurity removal is not carried out on the coagulated solids, and the coagulated solids are directly prepared.
Step three: the preparation is accomplished in aerogel pressurization, put into the autoclave with the solid that condenses after the clearance, the back is closed the pan feeding mouth, autoclave external connection has communicating pipe, with liquid carbon dioxide through the connecting pipe input autoclave in, during the autoclave work, the inside heating pressurization of autoclave can reach supercritical state until carbon dioxide, supercritical state's carbon dioxide replaces the methyl alcohol in the solid gap that condenses, take out the aerogel after the reaction is accomplished, stand for 1 hour and wait for carbon dioxide volatilize to atmospheric environment in the aerogel, the gap that the air in the atmospheric environment will be filled carbon dioxide before this moment is located, obtain aerogel solid.
Further, the pressure applied in the autoclave was 10MPa.
Step four: cutting and packaging, namely cutting according to the size of the frame of the packaging silica gel frame, packaging the frame with the silica gel frame, then coating the frame with a film, punching holes on the silica gel frame, installing a cover plate, spraying expansion type fireproof paint on the cover plate, and obtaining the battery heat insulation sheet, and waiting for product appearance detection.
Step five: observing and polishing, observing the appearance of the formed heat insulation sheet, and polishing and repairing the position with burrs.
Example III
Step one: the preparation method comprises the following steps of: 100-150 parts of methyl silicate, 150-225 parts of methanol, 0.6-1 part of concentrated ammonia water and 25-75 parts of water, taking out the methyl silicate and the methanol, placing the methyl silicate and the methanol in a container, stirring to obtain a mixed solution, adding the water and the concentrated ammonia water for secondary stirring after the solution is fully mixed, obtaining a solution to be coagulated, compounding the solution to be coagulated with a matrix, and standing the compounded composite material until the solution to be coagulated is thoroughly coagulated in a mold to form a coagulated solid.
Further, the solution to be coagulated is not compounded.
Further, the solution to be coagulated was directly left to stand for 24 hours.
Step two: cleaning impurities during preparation, taking out the coagulated solids, placing and immersing the coagulated solids in pure methanol, taking out the coagulated solids after immersing and removing impurities, standing the taken coagulated solids for 10 minutes and replacing a methanol solution, and then repeatedly immersing and removing impurities on the coagulated solids.
Further, the number of submergions was set to 10.
Further, the single immersion time period was set to 360 minutes.
Step three: the preparation is accomplished in aerogel pressurization, put into the autoclave with the solid that condenses after the clearance, the back is closed the pan feeding mouth, autoclave external connection has communicating pipe, with liquid carbon dioxide through the connecting pipe input autoclave in, during the autoclave work, the inside heating pressurization of autoclave can reach supercritical state until carbon dioxide, supercritical state's carbon dioxide replaces the methyl alcohol in the solid gap that condenses, take out the aerogel after the reaction is accomplished, stand for 1 hour and wait for carbon dioxide volatilize to atmospheric environment in the aerogel, the gap that the air in the atmospheric environment will be filled carbon dioxide before this moment is located, obtain aerogel solid.
Further, the pressure applied in the autoclave was 10MPa.
Step four: cutting and packaging, namely cutting according to the size of the frame of the packaging silica gel frame, packaging the frame with the silica gel frame, then coating the frame with a film, punching holes on the silica gel frame, installing a cover plate, spraying expansion type fireproof paint on the cover plate, and obtaining the battery heat insulation sheet, and waiting for product appearance detection.
Step five: observing and polishing, observing the appearance of the formed heat insulation sheet, and polishing and repairing the position with burrs.
Example IV
Step one: the preparation method comprises the following steps of: 100-150 parts of methyl silicate, 150-225 parts of methanol, 0.6-1 part of concentrated ammonia water and 25-75 parts of water, taking out the methyl silicate and the methanol, placing the methyl silicate and the methanol in a container, stirring to obtain a mixed solution, adding the water and the concentrated ammonia water for secondary stirring after the solution is fully mixed, obtaining a solution to be coagulated, compounding the solution to be coagulated with a matrix, and standing the compounded composite material until the solution to be coagulated is thoroughly coagulated in a mold to form a coagulated solid.
Further, the solution to be coagulated is not compounded.
Further, the solution to be coagulated was directly left to stand for 24 hours.
Step two: cleaning impurities during preparation, taking out the coagulated solids, placing and immersing the coagulated solids in pure methanol, taking out the coagulated solids after immersing and removing impurities, standing the taken coagulated solids for 10 minutes and replacing a methanol solution, and then repeatedly immersing and removing impurities on the coagulated solids.
Furthermore, the impurity removal is not carried out on the coagulated solids, and the coagulated solids are directly prepared.
Step three: the preparation is accomplished in aerogel pressurization, put into the autoclave with the solid that condenses after the clearance, the back is closed the pan feeding mouth, autoclave external connection has communicating pipe, with liquid carbon dioxide through the connecting pipe input autoclave in, during the autoclave work, the inside heating pressurization of autoclave can reach supercritical state until carbon dioxide, supercritical state's carbon dioxide replaces the methyl alcohol in the solid gap that condenses, take out the aerogel after the reaction is accomplished, stand for 1 hour and wait for carbon dioxide volatilize to atmospheric environment in the aerogel, the gap that the air in the atmospheric environment will be filled carbon dioxide before this moment is located, obtain aerogel solid.
Further, the pressure applied in the autoclave was 10MPa.
Step four: cutting and packaging, namely cutting according to the size of the frame of the packaging silica gel frame, packaging the frame with the silica gel frame, then coating the frame with a film, punching holes on the silica gel frame, installing a cover plate, spraying expansion type fireproof paint on the cover plate, and obtaining the battery heat insulation sheet, and waiting for product appearance detection.
Step five: observing and polishing, observing the appearance of the formed heat insulation sheet, and polishing and repairing the position with burrs.
Performance testing
The thickness of the prepared aerogel battery thermal insulation sheets was selected to be 3mm as the first experimental group, the first experimental control group, the second experimental group and the second experimental control group, respectively, according to the methods of the first embodiment, the second embodiment, the third embodiment and the fourth embodiment.
As can be seen from FIG. 2, the heat insulation temperature difference of each group is more than 400 ℃, the difference between the first experiment group and the second experiment group is not obvious, but after the first experiment group and the second experiment group are compared, the heat insulation temperature difference is found to be obviously higher than that of the corresponding experiment comparison group, which indicates that the battery heat insulation sheet prepared by the invention has good heat insulation performance, and after the operation of fully removing impurities, whether the aerogel is made of composite materials or not, the heat insulation capability of the aerogel can be improved to a certain extent.
It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art and which are included in the embodiments of the present invention without the inventive step, are intended to be within the scope of the present invention. Structures, devices and methods of operation not specifically described and illustrated herein are implemented by conventional means in the art unless specifically indicated and limited by the context.
Claims (9)
1. The utility model provides a battery thermal-insulated piece for lithium electricity which characterized in that: the heat insulation sheet comprises a cover plate, a fireproof cover, an electric core, a heat conduction plate, side barrier strips, ceramic fiber cloth and packaging materials, wherein the outer surface of the fireproof cover is coated with expansion type fireproof materials.
2. The battery thermal insulation sheet for lithium batteries according to claim 1, wherein: the packaging material comprises a PI film and a packaging silica gel frame, and the intumescent fireproof coating comprises ethyl fibers, chlorinated paraffin, fireproof pigment and solvent.
3. The process for manufacturing the heat insulating sheet for the battery for the lithium battery according to claim 1, wherein the process comprises the following steps of: the method comprises the following steps:
step one: the preparation method comprises the following steps of: 100-150 parts of methyl silicate, 150-225 parts of methanol, 0.6-1 part of concentrated ammonia water and 25-75 parts of water, taking out the methyl silicate and the methanol, placing the methyl silicate and the methanol in a container, stirring to obtain a mixed solution, adding water and the concentrated ammonia water for secondary stirring after the solution is fully mixed to obtain a solution to be coagulated, compounding the solution to be coagulated with a matrix, and standing the compounded composite material until the solution to be coagulated in a mold is thoroughly coagulated to form a coagulated solid;
step two: cleaning impurities during preparation, taking out the coagulated solids, placing and immersing the coagulated solids in pure methanol, taking out the coagulated solids after immersing and removing impurities, standing the taken coagulated solids for 10 minutes, replacing methanol solution, and then repeatedly immersing and removing impurities on the coagulated solids;
step three: the preparation method comprises the steps of (1) pressurizing aerogel to finish preparation, putting cleaned coagulated solids into an autoclave, closing a feed inlet, connecting a communicating pipe outside the autoclave, inputting liquid carbon dioxide into the autoclave through the connecting pipe, heating and pressurizing the inside of the autoclave until the carbon dioxide reaches a supercritical state when the autoclave works, replacing methanol in gaps of the coagulated solids with the carbon dioxide in the supercritical state, taking out aerogel after the reaction is finished, standing for 1 hour, waiting for volatilizing carbon dioxide in the aerogel to an atmosphere environment, and filling gaps of the carbon dioxide with air in the atmosphere environment at the moment to obtain aerogel solids;
step four: cutting and packaging, namely cutting according to the size of a frame of a packaged silica gel frame, filling the silica gel frame, coating a film, packaging, punching holes on the silica gel frame, mounting a cover plate, spraying expansion type fireproof paint on the cover plate, and obtaining a battery heat insulation sheet, and waiting for product appearance detection;
step five: observing and polishing, observing the appearance of the formed heat insulation sheet, and polishing and repairing the position with burrs.
4. The process for manufacturing a heat insulating sheet for a lithium battery according to claim 3, wherein: in the first step, the concentrated ammonia water is an aqueous solution containing 26% of ammonia.
5. The process for manufacturing a heat insulating sheet for a lithium battery according to claim 3, wherein: the substrate in the first step is glass fiber.
6. The process for manufacturing a heat insulating sheet for a lithium battery according to claim 3, wherein: the composite material of the first step has a standing waiting time of 24 hours.
7. The process for manufacturing a heat insulating sheet for a lithium battery according to claim 3, wherein: the immersion impurity removal time of the second step is 300-360 minutes, and the repeated immersion impurity removal time required by the coagulated solids is 5-10 times.
8. The process for manufacturing a heat insulating sheet for a lithium battery according to claim 3, wherein: the pressure applied in the autoclave in the step three is 8-20Mpa.
9. The process for manufacturing a heat insulating sheet for a lithium battery according to claim 3, wherein: and the thickness of the battery heat insulation sheet obtained in the step four is 3-12 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311680141.8A CN117680057A (en) | 2023-12-08 | 2023-12-08 | Battery heat insulation sheet for lithium battery and manufacturing process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311680141.8A CN117680057A (en) | 2023-12-08 | 2023-12-08 | Battery heat insulation sheet for lithium battery and manufacturing process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117680057A true CN117680057A (en) | 2024-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311680141.8A Pending CN117680057A (en) | 2023-12-08 | 2023-12-08 | Battery heat insulation sheet for lithium battery and manufacturing process thereof |
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| Country | Link |
|---|---|
| CN (1) | CN117680057A (en) |
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2023
- 2023-12-08 CN CN202311680141.8A patent/CN117680057A/en active Pending
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