CN107326422A - A kind of preparation method of aluminum alloy battery surface of shell composite insulation layer - Google Patents
A kind of preparation method of aluminum alloy battery surface of shell composite insulation layer Download PDFInfo
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- CN107326422A CN107326422A CN201710534572.1A CN201710534572A CN107326422A CN 107326422 A CN107326422 A CN 107326422A CN 201710534572 A CN201710534572 A CN 201710534572A CN 107326422 A CN107326422 A CN 107326422A
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- aluminum alloy
- alloy battery
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- composite insulation
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/024—Anodisation under pulsed or modulated current or potential
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
- C25D11/24—Chemical after-treatment
- C25D11/246—Chemical after-treatment for sealing layers
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- General Chemical & Material Sciences (AREA)
- Coating By Spraying Or Casting (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The preparation method of a kind of aluminum alloy battery surface of shell composite insulation layer disclosed by the invention, it is characterised in that specifically implement according to the following steps：Step 1, using cleaning agent aluminum alloy battery surface of shell is cleaned, to go to degrease, complete the pretreatment to aluminum alloy battery surface of shell；Step 2, the aluminum alloy battery surface of shell obtained after being pre-processed through step 1 prepare arc differential oxide ceramic layer；Step 3, polymethyl-benzene base organic siliconresin and absolute ethyl alcohol be mixed to get organic siliconresin spray coating liquor, the arc differential oxide ceramic layer obtained through step 2 is sprayed using organic siliconresin spray coating liquor, curing process, prepare composite insulation layer on aluminum alloy battery housing.Preparation method of the present invention can be in aluminum alloy battery surface of shell formation composite insulation layer, so as to improve the insulating properties on Al-alloy casing surface.
Description
Technical field
Field is modified the invention belongs to battery casing surface, is related to a kind of aluminum alloy battery surface of shell composite insulation layer
Preparation method.
Background technology
Aluminium alloy has the good characteristics such as high specific strength, easy processing shaping, heat conductivity and electric conductivity due to it, makes it
As the second largest metalloid material for being only second to steel now, it is widely used in kitchen meal apparatus, building decoration, " three boats " industry
And the industry such as communications and transportation.Required especially with new-energy automobile is light-weighted, in order to be able to further reduce the entirety of battery
Weight, improves the gravimetric specific energy of battery, meets the requirement of space high-energy-density electric current, used alumina-base material instead at present
(such as：3003 aluminium alloys) replace stainless steel.
However, causing short circuit to cause blast, it is necessary to aluminium to avoid anode and negative pole from being all connected with battery container
Alloy cell surface of shell carries out insulation processing.Though film layer obtained by traditional anodizing is with certain insulating properties,
It is to contain acid ion in the complex operation, and solution, the environmentally harmful polluter such as heavy metal ion.
The content of the invention
, can be in aluminium it is an object of the invention to provide a kind of preparation method of aluminum alloy battery surface of shell composite insulation layer
Alloy cell surface of shell formation composite insulation layer, so as to improve the insulating properties on Al-alloy casing surface.
The technical solution adopted in the present invention is, a kind of preparation method of aluminum alloy battery surface of shell composite insulation layer,
Specifically implement according to the following steps：
Step 1, using cleaning agent aluminum alloy battery surface of shell is cleaned, to go to degrease, completed to aluminium alloy
The pretreatment of battery casing surface；
Step 2, the aluminum alloy battery surface of shell obtained after being pre-processed through step 1 prepare arc differential oxide ceramic layer；
Step 3, polymethyl-benzene base organic siliconresin and absolute ethyl alcohol be mixed to get organic siliconresin spray coating liquor, using having
Machine silicones spray coating liquor is sprayed to the arc differential oxide ceramic layer obtained through step 2, curing process, in aluminum alloy battery housing
On prepare composite insulation layer.
The features of the present invention is also resided in：
In step 1：Cleaning agent uses the VpCI-416 aqueous solution that mass percent concentration is 2.5%~5%.
In step 2：Differential arc oxidation processing parameter is as follows：
Differential arc oxidation final voltage 500V~650V, processing time 10min~150min, frequency are 100Hz~1000Hz,
Dutycycle is 5%~30%；
Microarc oxidation solution is silicate and phosphate compound system, and solute total content is 41g/L~62g/L in system,
Wherein, solute and its content are respectively sodium metasilicate 10g/L~15g/L, calgon 25g/L~35g/L, hydroxide in system
Sodium 1g/L~2g/L, sodium carbonate 5g/L~10g/L.
Step 3 is specifically implemented according to following steps：
Step 3.1, polymethyl-benzene base organic siliconresin mixed with absolute ethyl alcohol, it is 5%~30% to make concentration
Organic siliconresin spray coating liquor；
Step 3.2, the aluminum alloy battery housing with arc differential oxide ceramic layer prepared in step 2 is put into baking oven
Middle carry out the pre-heat treatment；
Step 3.3, the aluminum alloy battery housing preheated through step 3.2 kept flat on a glass, will be prepared through step 3.1
The organic siliconresin spray coating liquor gone out is uniformly sprayed using spray gun and is covered on the arc differential oxide ceramic layer of aluminum alloy battery housing,
When light tone occurs in the arc differential oxide ceramic layer surface of matt, stop spraying, after after organic coating cold curing, in aluminium alloy electric
Composite insulation layer is prepared on the housing of pond, that is, completes the preparation of composite insulation layer.
In step 3.2, in preheating treatment procedure：Temperature is 110 DEG C~120 DEG C, and the time is 10min~20min.
In step 3.3：During spraying, the distance of spray gun and Al-alloy casing is 200mm~300mm, and spray gun is put down with workpiece
At right angles, spray gun travels at the uniform speed in face, and the speed of service is 300mm/s~500mm/s, and spray gun pressure is 0.3Mpa~0.5Mpa.
The beneficial effects of the present invention are：
(1) preparation method of a kind of aluminum alloy battery surface of shell composite insulation layer of the invention, wherein using differential arc oxidation
Spray combination process, prepared composite insulation layer has higher dielectric strength (minimum value can reach 22KV/mm)；
(2) a kind of preparation method of aluminum alloy battery surface of shell composite insulation layer of the invention, can form Al-alloy casing
The loose structure of arc differential oxide ceramic layer, the structure is conducive to the formation machinery between polymethyl-benzene base silicone resin layer to sting
Close, so that composite film has good adhesion；
(3) a kind of preparation method of aluminum alloy battery surface of shell composite insulation layer of the invention, polymethyl-benzene base organosilicon
Resin can be carried to the introducing that arc differential oxide ceramic layer plays a part of closing phenyl silica chain link in ceramic capillary, and the resin
The resistance to insulating properties of high resin in itself, can further improve the insulating properties of composite film；
(4) a kind of preparation method of aluminum alloy battery surface of shell composite insulation layer of the invention has the excellent of environmental protection
Point, the requirement for equipment in preparation process is low, simple to operate, and cost is also than relatively low.
Brief description of the drawings
Fig. 1 is the SEM figures for the Al-alloy casing arc differential oxide ceramic layer that embodiment 2 is obtained；
Fig. 2 is the SEM figures for the Al-alloy casing composite bed that embodiment 2 is obtained；
Fig. 3 is the SEM figures for the Al-alloy casing differential arc oxidation composite bed that embodiment 2 is obtained.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and detailed description.
A kind of preparation method of aluminum alloy battery surface of shell composite insulation layer of the present invention, specifically implements in the following manner：
Step 1, using cleaning agent aluminum alloy battery surface of shell is cleaned, to go to degrease, completed to aluminium alloy
The pretreatment of battery casing surface；
Environmentally friendly neutral cleaners therein use the VpCI-416 water that mass percent concentration is 2.5%~5%
Solution.
Step 2, the aluminum alloy battery surface of shell obtained after being pre-processed through step 1 prepare arc differential oxide ceramic layer,
Specifically implement in accordance with the following methods：
The aluminum alloy battery housing obtained after being pre-processed through step 1 is placed in microarc oxidation solution, by aluminum alloy battery
Housing is as anode, using stainless steel plate as negative electrode, carries out differential arc oxidation processing, is prepared in aluminum alloy battery surface of shell micro-
Arc oxidation ceramic layer；
Differential arc oxidation processing parameter is as follows：
Differential arc oxidation final voltage 500V~650V, processing time 10min~150min, frequency are 100Hz~1000Hz,
Dutycycle is 5%~30%；
Microarc oxidation solution is silicate and phosphate compound system, and solute total content is 41g/L~62g/L in system,
Wherein, each solute and its content are respectively sodium metasilicate 10g/L~15g/L, calgon 25g/L~35g/L, hydrogen-oxygen in system
Change sodium 1g/L~2g/L, sodium carbonate 5g/L~10g/L.
Step 3, polymethyl-benzene base organic siliconresin and absolute ethyl alcohol be mixed to get organic siliconresin spray coating liquor, using having
Machine silicones spray coating liquor is sprayed to the arc differential oxide ceramic layer obtained through step 2, curing process, in aluminum alloy battery housing
On prepare composite insulation layer.
Step 3.1, polymethyl-benzene base organic siliconresin mixed with absolute ethyl alcohol, it is 5%~30% to make concentration
Organic siliconresin spray coating liquor, wherein absolute ethyl alcohol are used as diluent.
Step 3.2, the aluminum alloy battery housing with arc differential oxide ceramic layer prepared in step 2 is put into baking oven
Middle carry out the pre-heat treatment, preheating temperature is 110 DEG C~120 DEG C, and the time is 10min~20min.
Step 3.3, the aluminum alloy battery housing preheated through step 3.2 lain on the glass plate of cleaning, will be through step
The 3.1 organic siliconresin spray coating liquors made uniformly spray the differential arc oxidation pottery for being covered in aluminum alloy battery housing using spray gun
On enamel coating, when light tone occurs in the arc differential oxide ceramic layer surface of matt, stop spraying, after after organic coating cold curing,
Composite insulation layer is prepared on aluminum alloy battery housing, that is, completes the preparation of composite insulation layer.
In step 3.3：During spraying, the distance of spray gun and Al-alloy casing is 200mm~300mm, and spray gun is put down with workpiece
At right angles, spray gun travels at the uniform speed in face, and the speed of service is 300mm/s~500mm/s, and spray gun pressure is 0.3Mpa~0.5Mpa.
A kind of preparation method of aluminum alloy battery surface of shell composite insulation layer of the present invention, is controlled in micro-arc oxidation process
Corresponding parameter, can quickly, accurately prepare satisfactory mechanical property and be conducive to combining the micro-nano size of silicone resin coating
Porous ceramics Rotating fields；Meanwhile, pass through the spray gun when concentration and the spraying that adjust polymethyl-benzene base organic siliconresin spray coating liquor
The thickness of the controllable sprayed coating such as distance, the spray gun speed of service with workpiece.Ceramic and organic siliconresin is good
Insulator, by the growth in situ ceramic layer on Al-alloy casing matrix, and loose structure and poly- methyl by ceramic layer
The excellent dielectric strength of phenyl organic siliconresin, may be such that Al-alloy casing surface obtains excellent insulating properties.
Embodiment 1
Step 1, using cleaning agent aluminum alloy battery surface of shell is cleaned, to go to degrease, completed to aluminium alloy
The pretreatment of battery casing surface；
Environmentally friendly neutral cleaners therein use the VpCI-416 water that mass percent concentration is 2.5%~5%
Solution.
Step 2, the aluminum alloy battery surface of shell obtained after being pre-processed through step 1 prepare arc differential oxide ceramic layer,
Specifically implement in accordance with the following methods：
The aluminum alloy battery housing obtained after being pre-processed through step 1 is placed in microarc oxidation solution, by aluminum alloy battery
Housing is as anode, using stainless steel plate as negative electrode, carries out differential arc oxidation processing, is prepared in aluminum alloy battery surface of shell micro-
Arc oxidation ceramic layer；
Differential arc oxidation processing parameter is as follows：
Differential arc oxidation final voltage 620V, processing time 40min, frequency is 500Hz, and dutycycle is 10%；
Microarc oxidation solution be silicate and phosphate compound system, wherein sodium metasilicate 10g/L, calgon 30g/L,
Sodium hydroxide 1g/L, sodium carbonate 8g/L.
Step 3, polymethyl-benzene base organic siliconresin and absolute ethyl alcohol be mixed to get organic siliconresin spray coating liquor, using having
Machine silicones spray coating liquor is sprayed to the arc differential oxide ceramic layer obtained through step 2, curing process, in aluminum alloy battery housing
On prepare composite insulation layer.
Step 3.1, polymethyl-benzene base organic siliconresin mixed with absolute ethyl alcohol, make the organosilicon that concentration is 15%
Resin spray liquid, wherein absolute ethyl alcohol are used as diluent.
Step 3.2, the aluminum alloy battery housing with arc differential oxide ceramic layer prepared in step 2 is put into baking oven
Middle carry out the pre-heat treatment, preheating temperature is 110 DEG C, and the time is 15min.
Step 3.3, the aluminum alloy battery housing preheated through step 3.2 lain on the glass plate of cleaning, will be through step
The 3.1 organic siliconresin spray coating liquors made uniformly spray the differential arc oxidation pottery for being covered in aluminum alloy battery housing using spray gun
On enamel coating, when light tone occurs in the arc differential oxide ceramic layer surface of matt, stop spraying, after after organic coating cold curing,
Composite insulation layer is prepared on aluminum alloy battery housing, that is, completes the preparation of composite insulation layer.
In step 3.3：During spraying, the distance of spray gun and Al-alloy casing is 200mm~300mm, and spray gun is put down with workpiece
At right angles, spray gun travels at the uniform speed in face, and the speed of service is 300mm/s~500mm/s, and spray gun pressure is 0.3Mpa~0.5Mpa.
Using the thickness of the composite films such as eddy current thickness meter, rough surface instrument, voltage resistant instrument, roughness, it is breakdown voltage resistant enter
Row detection.As a result it is as follows：
Composite bed thickness is 33 μm~38 μm, and roughness is 1.5 μm~2.0 μm, and minimum breakdown voltage is 1000V.
Embodiment 2
Step 1, using cleaning agent aluminum alloy battery surface of shell is cleaned, to go to degrease, completed to aluminium alloy
The pretreatment of battery casing surface；
Environmentally friendly neutral cleaners therein use the VpCI-416 water that mass percent concentration is 2.5%~5%
Solution.
Step 2, the aluminum alloy battery surface of shell obtained after being pre-processed through step 1 prepare arc differential oxide ceramic layer,
Specifically implement in accordance with the following methods：
The aluminum alloy battery housing obtained after being pre-processed through step 1 is placed in microarc oxidation solution, by aluminum alloy battery
Housing is as anode, using stainless steel plate as negative electrode, carries out differential arc oxidation processing, is prepared in aluminum alloy battery surface of shell micro-
Arc oxidation ceramic layer；
Differential arc oxidation processing parameter is as follows：
Differential arc oxidation final voltage 600V, processing time 20min, frequency is 500Hz, and dutycycle is 12%；
Microarc oxidation solution be silicate and phosphate compound system, wherein sodium metasilicate 10g/L, calgon 35g/L,
Sodium hydroxide 1g/L, sodium carbonate 10g/L.
Made pottery as shown in figure 1, wherein Fig. 1 is the Al-alloy casing differential arc oxidation prepared using the preparation method of the present invention
The SEM figures of enamel coating, as can be seen from the figure：After differential arc oxidation is handled, Al-alloy casing surface is by one layer of " volcano peak " shape
Micro-arc oxidation films are covered, and with certain roughness, there is a large amount of micron orders not being pierced and nano level blind hole, this is micro-
Pore structure is conducive to and organic siliconresin formation mechanical snap.
Step 3, polymethyl-benzene base organic siliconresin and absolute ethyl alcohol be mixed to get organic siliconresin spray coating liquor, using having
Machine silicones spray coating liquor is sprayed to the arc differential oxide ceramic layer obtained through step 2, curing process, in aluminum alloy battery housing
On prepare composite insulation layer.
Step 3.1, polymethyl-benzene base organic siliconresin mixed with absolute ethyl alcohol, make the organosilicon that concentration is 20%
Resin spray liquid, wherein absolute ethyl alcohol are used as diluent.
Step 3.2, the aluminum alloy battery housing with arc differential oxide ceramic layer prepared in step 2 is put into baking oven
Middle carry out the pre-heat treatment, preheating temperature is 120 DEG C, and the time is 10min.
Step 3.3, the aluminum alloy battery housing preheated through step 3.2 lain on the glass plate of cleaning, will be through step
The 3.1 organic siliconresin spray coating liquors made uniformly spray the differential arc oxidation pottery for being covered in aluminum alloy battery housing using spray gun
On enamel coating, when light tone occurs in the arc differential oxide ceramic layer surface of matt, stop spraying, after after organic coating cold curing,
Composite insulation layer is prepared on aluminum alloy battery housing, that is, completes the preparation of composite insulation layer.
In step 3.3：During spraying, the distance of spray gun and Al-alloy casing is 200mm~300mm, and spray gun is put down with workpiece
At right angles, spray gun travels at the uniform speed in face, and the speed of service is 300mm/s~500mm/s, and spray gun pressure is 0.3Mpa~0.5Mpa.
As shown in Fig. 2 wherein showing the SEM of the compound inslation layer surface prepared using preparation method of the present invention
Figure, it can be seen that：After spraying, the micropore of micro-arc oxidation films is covered by organic siliconresin, and organic siliconresin is served very
Good sealing effect.
Fig. 3 is the SEM figures of the compound inslation layer cross section prepared, it can be seen that arc differential oxide ceramic layer and aluminum substrate
Connected with chemical bond.After spraying, organic siliconresin is entered in the micropore of ceramic layer, and with ceramic layer mechanical snap, it is multiple
Closing film layer and aluminum substrate has excellent bond strength.
Using the thickness of the composite films such as eddy current thickness meter, rough surface instrument, voltage resistant instrument, roughness, it is breakdown voltage resistant enter
Row detection.As a result it is as follows：
Composite bed thickness is 18 μm~24 μm, and roughness is 1.0 μm~1.2 μm, and minimum breakdown voltage value is 826V.
Embodiment 3
Step 1, using environmental protection neutral cleaners aluminum alloy battery surface of shell is cleaned, it is complete to go to degrease
The pretreatment of paired aluminum alloy battery surface of shell；
Environmentally friendly neutral cleaners therein use the VpCI-416 water that mass percent concentration is 2.5%~5%
Solution.
Step 2, the aluminum alloy battery surface of shell obtained after being pre-processed through step 1 prepare arc differential oxide ceramic layer,
Specifically implement in accordance with the following methods：
The aluminum alloy battery housing obtained after being pre-processed through step 1 is placed in microarc oxidation solution, by aluminum alloy battery
Housing is as anode, using stainless steel plate as negative electrode, carries out differential arc oxidation processing, is prepared in aluminum alloy battery surface of shell micro-
Arc oxidation ceramic layer；
Differential arc oxidation processing parameter is as follows：
Differential arc oxidation final voltage 620V, processing time 30min, frequency is 600Hz, and dutycycle is 15%；
Microarc oxidation solution be silicate and phosphate compound system, wherein sodium metasilicate 12g/L, calgon 35g/L,
Sodium hydroxide 1g/L, sodium carbonate 5g/L.
Step 3, polymethyl-benzene base organic siliconresin and absolute ethyl alcohol be mixed to get organic siliconresin spray coating liquor, using having
Machine silicones spray coating liquor is sprayed to the arc differential oxide ceramic layer obtained through step 2, curing process, in aluminum alloy battery housing
On prepare composite insulation layer.
Step 3.1, polymethyl-benzene base organic siliconresin mixed with absolute ethyl alcohol, make the organosilicon that concentration is 25%
Resin spray liquid, wherein absolute ethyl alcohol are used as diluent.
Step 3.2, the aluminum alloy battery housing with arc differential oxide ceramic layer prepared in step 2 is put into baking oven
Middle carry out the pre-heat treatment, preheating temperature is 120 DEG C, and the time is 10min.
Step 3.3, the aluminum alloy battery housing preheated through step 3.2 lain on the glass plate of cleaning, will be through step
The 3.1 organic siliconresin spray coating liquors made uniformly spray the differential arc oxidation pottery for being covered in aluminum alloy battery housing using spray gun
On enamel coating, when light tone occurs in the arc differential oxide ceramic layer surface of matt, stop spraying, after after organic coating cold curing,
Composite insulation layer is prepared on aluminum alloy battery housing, that is, completes the preparation of composite insulation layer.
In step 3.3：During spraying, the distance of spray gun and Al-alloy casing is 200mm~300mm, and spray gun is put down with workpiece
At right angles, spray gun travels at the uniform speed in face, and the speed of service is 300mm/s~500mm/s, and spray gun pressure is 0.3Mpa~0.5Mpa.
Using the thickness of the composite films such as eddy current thickness meter, rough surface instrument, voltage resistant instrument, roughness, it is breakdown voltage resistant enter
Row detection.As a result it is as follows：
Composite bed thickness is 25 μm~32 μm, and roughness is 1.3 μm~1.6 μm, and minimum breakdown voltage value is 987V.
Embodiment 4
Step 1, using environmental protection neutral cleaners aluminum alloy battery surface of shell is cleaned, it is complete to go to degrease
The pretreatment of paired aluminum alloy battery surface of shell；
Environmentally friendly neutral cleaners therein use the VpCI-416 water that mass percent concentration is 2.5%~5%
Solution.
Step 2, the aluminum alloy battery surface of shell obtained after being pre-processed through step 1 prepare arc differential oxide ceramic layer,
Specifically implement in accordance with the following methods：
The aluminum alloy battery housing obtained after being pre-processed through step 1 is placed in microarc oxidation solution, by aluminum alloy battery
Housing is as anode, using stainless steel plate as negative electrode, carries out differential arc oxidation processing, is prepared in aluminum alloy battery surface of shell micro-
Arc oxidation ceramic layer；
Differential arc oxidation processing parameter is as follows：
Differential arc oxidation final voltage 580V, processing time 30min, frequency is 400Hz, and dutycycle is 18%；
Microarc oxidation solution be silicate and phosphate compound system, wherein sodium metasilicate 15g/L, calgon 35g/L,
Sodium hydroxide 1.5g/L, sodium carbonate 10g/L.
Step 3, polymethyl-benzene base organic siliconresin and absolute ethyl alcohol be mixed to get organic siliconresin spray coating liquor, using having
Machine silicones spray coating liquor is sprayed to the arc differential oxide ceramic layer obtained through step 2, curing process, in aluminum alloy battery housing
On prepare composite insulation layer.
Step 3.1, polymethyl-benzene base organic siliconresin mixed with absolute ethyl alcohol, make the organosilicon that concentration is 30%
Resin spray liquid, wherein absolute ethyl alcohol are used as diluent.
Step 3.2, the aluminum alloy battery housing with arc differential oxide ceramic layer prepared in step 2 is put into baking oven
Middle carry out the pre-heat treatment, preheating temperature is 115 DEG C, and the time is 12min.
Step 3.3, the aluminum alloy battery housing preheated through step 3.2 lain on the glass plate of cleaning, will be through step
The 3.1 organic siliconresin spray coating liquors made uniformly spray the differential arc oxidation pottery for being covered in aluminum alloy battery housing using spray gun
On enamel coating, when light tone occurs in the arc differential oxide ceramic layer surface of matt, stop spraying, after after organic coating cold curing,
Composite insulation layer is prepared on aluminum alloy battery housing, that is, completes the preparation of composite insulation layer.
In step 3.3：During spraying, the distance of spray gun and Al-alloy casing is 200mm~300mm, and spray gun is put down with workpiece
At right angles, spray gun travels at the uniform speed in face, and the speed of service is 300mm/s~500mm/s, and spray gun pressure is 0.3Mpa~0.5Mpa.
Using eddy current thickness meter, rough surface instrument, voltage resistant instrument to the thickness of composite film, roughness, it is breakdown voltage resistant enter
Row detection.As a result it is as follows：
Composite bed thickness is 28 μm~35 μm, and roughness is 1.4 μm~1.7 μm, and minimum breakdown voltage value is 1000V.
Embodiment 5
Step 1, using environmental protection neutral cleaners aluminum alloy battery surface of shell is cleaned, it is complete to go to degrease
The pretreatment of paired aluminum alloy battery surface of shell；
Environmentally friendly neutral cleaners therein use the VpCI-416 water that mass percent concentration is 2.5%~5%
Solution.
Step 2, the aluminum alloy battery surface of shell obtained after being pre-processed through step 1 prepare arc differential oxide ceramic layer,
Specifically implement in accordance with the following methods：
The aluminum alloy battery housing obtained after being pre-processed through step 1 is placed in microarc oxidation solution, by aluminum alloy battery
Housing is as anode, using stainless steel plate as negative electrode, carries out differential arc oxidation processing, is prepared in aluminum alloy battery surface of shell micro-
Arc oxidation ceramic layer；
Differential arc oxidation processing parameter is as follows：
Differential arc oxidation final voltage 600V, processing time 50min, frequency is 600Hz, and dutycycle is 20%；
Microarc oxidation solution be silicate and phosphate compound system, wherein sodium metasilicate 15g/L, calgon 30g/L,
Sodium hydroxide 1g/L, sodium carbonate 8g/L.
Step 3, polymethyl-benzene base organic siliconresin and absolute ethyl alcohol be mixed to get organic siliconresin spray coating liquor, using having
Machine silicones spray coating liquor is sprayed to the arc differential oxide ceramic layer obtained through step 2, curing process, in aluminum alloy battery housing
On prepare composite insulation layer.
Step 3.1, polymethyl-benzene base organic siliconresin mixed with absolute ethyl alcohol, make the organosilicon that concentration is 5%
Resin spray liquid, wherein absolute ethyl alcohol are used as diluent.
Step 3.2, the aluminum alloy battery housing with arc differential oxide ceramic layer prepared in step 2 is put into baking oven
Middle carry out the pre-heat treatment, preheating temperature is 120 DEG C, and the time is 10min.
Step 3.3, the aluminum alloy battery housing preheated through step 3.2 lain on the glass plate of cleaning, will be through step
The 3.1 organic siliconresin spray coating liquors made uniformly spray the differential arc oxidation pottery for being covered in aluminum alloy battery housing using spray gun
On enamel coating, when light tone occurs in the arc differential oxide ceramic layer surface of matt, stop spraying, after after organic coating cold curing,
Composite insulation layer is prepared on aluminum alloy battery housing, that is, completes the preparation of composite insulation layer.
In step 3.3：During spraying, the distance of spray gun and Al-alloy casing is 200mm~300mm, and spray gun is put down with workpiece
At right angles, spray gun travels at the uniform speed in face, and the speed of service is 300mm/s~500mm/s, and spray gun pressure is 0.3Mpa~0.5Mpa.
Using the thickness of the composite films such as eddy current thickness meter, rough surface instrument, voltage resistant instrument, roughness, it is breakdown voltage resistant enter
Row detection.As a result it is as follows：
Composite bed thickness is 35 μm~44 μm, and roughness is 1.7 μm~2.2 μm, and minimum breakdown voltage value is 1000V.
Claims (6)
1. a kind of preparation method of aluminum alloy battery surface of shell composite insulation layer, it is characterised in that specifically real according to the following steps
Apply：
Step 1, using cleaning agent aluminum alloy battery surface of shell is cleaned, to go to degrease, completed to aluminum alloy battery
The pretreatment of surface of shell；
Step 2, the aluminum alloy battery surface of shell obtained after being pre-processed through step 1 prepare arc differential oxide ceramic layer；
Step 3, polymethyl-benzene base organic siliconresin and absolute ethyl alcohol be mixed to get organic siliconresin spray coating liquor, utilize organosilicon
Resin spray liquid is sprayed to the arc differential oxide ceramic layer obtained through step 2, curing process, is made on aluminum alloy battery housing
It is standby go out composite insulation layer.
2. a kind of preparation method of aluminum alloy battery surface of shell composite insulation layer as claimed in claim 1, it is characterised in that
In the step 1：Cleaning agent uses the VpCI-416 aqueous solution that mass percent concentration is 2.5%~5%.
3. a kind of preparation method of aluminum alloy battery surface of shell composite insulation layer as claimed in claim 1, it is characterised in that
In the step 2：Differential arc oxidation processing parameter is as follows：
Differential arc oxidation final voltage 500V~650V, processing time 10min~150min, frequency are 100Hz~1000Hz, duty
Than for 5%~30%；
Microarc oxidation solution is silicate and phosphate compound system, and solute total content is 41g/L~62g/L in system, wherein,
Solute and its content are respectively sodium metasilicate 10g/L~15g/L, calgon 25g/L~35g/L, sodium hydroxide 1g/ in system
L~2g/L, sodium carbonate 5g/L~10g/L.
4. a kind of preparation method of aluminum alloy battery surface of shell composite insulation layer as claimed in claim 1, it is characterised in that
The step 3 is specifically implemented according to following steps：
Step 3.1, polymethyl-benzene base organic siliconresin mixed with absolute ethyl alcohol, make concentration for 5%~30% it is organic
Silicones spray coating liquor；
Step 3.2, the aluminum alloy battery housing with arc differential oxide ceramic layer prepared in step 2 is put into baking oven
Row the pre-heat treatment；
Step 3.3, the aluminum alloy battery housing preheated through step 3.2 kept flat on a glass, by what is made through step 3.1
Organic siliconresin spray coating liquor is uniformly sprayed using spray gun and is covered on the arc differential oxide ceramic layer of aluminum alloy battery housing, treats Asia
When light tone occurs in the arc differential oxide ceramic layer surface of light, stop spraying, after after organic coating cold curing, in aluminum alloy battery shell
Composite insulation layer is prepared on body, that is, completes the preparation of composite insulation layer.
5. a kind of preparation method of aluminum alloy battery surface of shell composite insulation layer as claimed in claim 4, it is characterised in that
In the step 3.2, in preheating treatment procedure：Temperature is 110 DEG C~120 DEG C, and the time is 10min~20min.
6. a kind of preparation method of aluminum alloy battery surface of shell composite insulation layer as claimed in claim 4, it is characterised in that
In the step 3.3：During spraying, the distance of spray gun and Al-alloy casing is 200mm~300mm, and spray gun is in workpiece planarization
Right angle, spray gun travels at the uniform speed, and the speed of service is 300mm/s~500mm/s, and spray gun pressure is 0.3Mpa~0.5Mpa.
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