CN109926290A - Battery case surface protecting layer and process for protecting - Google Patents
Battery case surface protecting layer and process for protecting Download PDFInfo
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- CN109926290A CN109926290A CN201711352290.6A CN201711352290A CN109926290A CN 109926290 A CN109926290 A CN 109926290A CN 201711352290 A CN201711352290 A CN 201711352290A CN 109926290 A CN109926290 A CN 109926290A
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Abstract
The invention discloses a kind of Battery case surface protecting layer and process for protecting.Battery case surface protecting layer includes electrophoresis layer and external coating, and the external coating is coated in the electrophoresis layer, the external coating with a thickness of 1000 ± 200 microns, the external coating is polymer coating made of spraying.Battery case surface protecting layer of the invention and process for protecting significantly improve the quick change battery pack corrosion resistance and wearability in actual use positioned at automobile chassis.
Description
Technical field
The present invention relates to quick change battery pack, battery replacement device and automation application field, in particular to a kind of Battery case
Surface protecting layer and technique.
Background technique
Electrophoretic process is used after technique metal plate punching, welding fabrication at present, electrophoretic process can reach normal theoretical using anti-
Shield requires, but actual battery packet is installed on chassis, and rain water, Stone Shock on chassis in normal driving process, destructible surface
Electrophoresis protective layer influences surface quality in actual use, corrodes in advance, Battery case surface in the prior art intolerant to
Mill, it is not corrosion-resistant, influence normal service life.It is also attempted in the prior art by electrophoresis layer thickening or spray paint, but due to
Automobile chassis operating condition is severe, and general coating can not resist abrasion and corrosion under vehicle chassis environment.
Summary of the invention
The technical problem to be solved by the present invention is in order to overcome the not wear-resisting not corrosion resistant in Battery case surface in the prior art
The defect of erosion provides a kind of Battery case surface protecting layer and process for protecting.
The present invention is to solve above-mentioned technical problem by following technical proposals:
A kind of Battery case surface protecting layer, it is characterized in that comprising electrophoresis layer and external coating, the external coating coating
In the electrophoresis layer, the external coating with a thickness of 1000 ± 200 microns, the external coating is that polymer made of spraying applies
Layer, the shore hardness after the external coating solidifies is 55 ± 5D, and the tensile strength after the external coating solidifies is 10MPa or more,
Tearing strength after the external coating solidifies is 90KN/m or more.It is further added by external coating outside electrophoresis layer, electricity can be significantly improved
The anticorrosive property and wearability of pond tank surface.And external coating is tested using national standard GB2423.18 when meeting above-mentioned performance indicator
The surface salt spray test of standard 480 hours and using after Stone Shock 480 hours of DIN 55996-1 testing standard, battery case
Body surface protecting layer surface is not destroyed, and the performance on Battery case surface is best.
Preferably, the external coating is polyurea coating.The comprehensive performance of polyurea coating is optimal.
Preferably, the external coating is PVC coating.PVC coating can reach the protective performance requirement on Battery case surface,
Cost is relatively low.
A kind of Battery case surface protection process, it is characterized in that comprising following steps:
S1, select after solidification shore hardness is 55 ± 5D, tensile strength is 10MPa or more, tearing strength be 90KN/m with
On protective coating；
S2, the protective coating is sprayed to the Battery case surface by electrophoretic process, forms external coating, the outer painting
Layer with a thickness of 1000 ± 200 microns；
S3, solidification is stood at normal temperature.By spraying, and spray gun inclination angle and spraying rate are rationally controlled, can obtained
To the coating with a thickness of 1000 ± 200 microns, using national standard GB2423.18 testing standard surface salt spray test 480 hours and
After Stone Shock 480 hours of DIN 55996-1 testing standard, Battery case surfacecti proteon layer surface is not destroyed,
The coating of this thickness can reach requirement of shelter, while cost is reasonable.
Preferably, coating the protective coating, the spraying direction of the spray gun and battery case using spray gun in step s 2
The surface of body is in 25 degree of -35 degree angle, and with the speed even application of 0.1 ± 0.05m/s 3 times.The angle of spray of 25 degree of -35 degree of selection
Degree, the speed of 0.1 ± 0.05m/s and the coating that can obtain densification for even application 3 times improve the hardness of coating, stretch by force
Degree and tearing strength.
Preferably, the protective coating is carbamide paint.
It is 10 degree to 38 by painting surface temperature preferably, keeping humidity to be higher than 85% when spraying the carbamide paint
Degree, and it is at least 3 degree higher than dew-point temperature by painting surface temperature.Suitable temperature and humidity, which is arranged, can guarantee coating quality.
Preferably, after spraying the carbamide paint, in polyurea coating level paint laid on, then inside finishing coat
It is spilled into dry quartz sand, then quartz sand is rolled into inside polyurea coating with roller.Rolling into quartz sand can further increase
The wear-resisting property of coating.
Preferably, the protective coating is PVC coating.
Preferably, in 25 DEG C -30 DEG C of at a temperature of spraying PVC coating.
On the basis of common knowledge of the art, above-mentioned each optimum condition, can any combination to get each preferable reality of the present invention
Example.
The positive effect of the present invention is that: Battery case surface protecting layer of the invention and process for protecting significantly improve
Positioned at the quick change battery pack corrosion resistance and wearability in actual use of automobile chassis.
Detailed description of the invention
Fig. 1 is the Battery case surface protecting layer schematic diagram of present pre-ferred embodiments.
Description of symbols:
Battery case 1
Electrophoresis layer 2
External coating 3
Specific embodiment
The present invention is further illustrated below by the mode of embodiment, but does not therefore limit the present invention to the reality
It applies among a range.
Embodiment 1
The Battery case surface protecting layer of the present embodiment is as shown in Figure 1, include electrophoresis layer 2 and external coating 3, electrophoresis layer 2 applies
It overlays on Battery case 1, external coating 3 is coated in electrophoresis layer 2, and external coating 3 is polyurea coating, model X-8190, polyureas material
Material manufacturer is that upper SeaBird satisfies Chemical Industry Science Co., Ltd, external coating 3 with a thickness of 1000 ± 200 microns, external coating 3 is spray
Polyurea coating made of painting, the shore hardness after external coating 3 solidifies is 55 ± 5D, and the tensile strength after external coating 3 solidifies is
10MPa, the tearing strength after external coating 3 solidifies is 90kN/m.
Embodiment 2
The Battery case surface protecting layer of the present embodiment is as shown in Figure 1, include electrophoresis layer 2 and external coating 3, electrophoresis layer 2 applies
It overlays on Battery case 1, external coating 3 is coated in electrophoresis layer 2, and external coating 3 is PVC coating, model EFCOAT PB S38
YT1, PVC material manufacturer are Wuhu according to Duo Ke chemical products Co., Ltd, external coating 3 with a thickness of 1000 ± 200 microns,
External coating 3 be spraying made of PVC coating, external coating 3 solidify after shore hardness be 55 ± 5D, external coating 3 solidify after drawing
Stretching intensity is 10MPa, and the tearing strength after external coating 3 solidifies is 90KN/m.
The performance test of embodiment 3, embodiment 4, comparative example 1 and comparative example 2 is all made of following standard, in which:
Alternation salt spray test uses national standard GB2423.18, test parameters: 4 circulation matrix corrosion < 5%, without blistering, side
Edge expands erosion < 2mm；
Thickness measure uses ISO2178, the measurement of thickness of coating, the non magnetic coating on magnetic substrate, test parameters:
16-25μm；
Alkaline-resisting test uses ISO2812-1, test parameters: measurement of the colored paint with varnish resistant to liquid medium is not sent out for 5 hours
It is viscous, light permission light discolouration；
Acid proof test uses ISO2812-1, test parameters: measurement of the colored paint with varnish resistant to liquid medium is not sent out for 24 hours
It is viscous, allow light discolouration；
Sandstone shock-testing uses DIN 55996-1, and the resistance to stone of painting layer hits performance test, test parameters :≤2 grades；
Wearability/adhesive force test uses ISO2409, paint and varnish cross cut test, parameter: 0 grade.
Embodiment 3
The Battery case surface protection process of the present embodiment the following steps are included:
S1, carbamide paint is selected, shore hardness is 55 ± 5D after the paint solidification, tensile strength is 10MPa or more, tearing
Intensity is 90KN/m or more, and loose attachment is blown away in degreasing with air gun,
S2, above-mentioned carbamide paint is sprayed into the Battery case surface by electrophoretic process, coats protection using spray gun and applies
Material, the spraying direction of spray gun and the surface of Battery case 1 are in 30 degree of angles, and with the speed even application of 0.1 ± 0.05m/s 3 times,
Formed external coating 3, external coating 3 with a thickness of 1000 ± 200 microns, in spray polyurea coating, keep humidity be higher than 85%, quilt
Applying surface temperature is 10 degree to 38 degree, and at least 3 degree higher than dew-point temperature by painting surface temperature, after spray polyurea coating,
Polyurea coating level paint laid on, dry quartz sand is then spilled into inside finishing coat, then quartz sand is rolled with roller
Into inside polyurea coating；
S3, solidification 3 minutes are stood at normal temperature, check whether there is holiday and whether coating is defective, and mark, range estimation is
No grinning effect repairs defect, and bottom drain phenomenon such as occur can normally fill spray.
Spray gun gradient is by 30 ° of angle sprays, and spraying rear surface is matt band point, and surface covering is uniform, existing without bottom drain
As.Spray gun inclination angle and spraying rate mainly control coating thickness consistency, prevent thickness from accumulating.Coating layer thickness, spray gun inclination
The relationship of angle and spraying rate can obtain as follows:
If the volume flow of gun slot is Q, the angle of spray gun and the product surface to be sprayed is 90 °, sprays the process of polyureas
The movement speed of middle spray gun is v, and it is d that spray gun, which is sprayed onto the work diameter of a circle on product, and the polyurea layer of spraying is with a thickness of T, spraying
Time is t.
The polyureas volume that spray gun sprays in time t is Qt.The mobile distance of spray gun is vt in time t, in time t
The average area of spray gun spraying product is dvt, and the polyureas volume sprayed on product is dvtT.
The polyureas volume that spray gun sprays should be equal to the volume for spraying to polyureas on product.It can thus be concluded that:
Qt=dvtT (1)
T=Q/vd (2)
In formula (1) and formula (2), the general control air pressure of high pressure polyureas flush coater spray gun is in 0.4-0.8m/s, spray
Mouth is remote from object plane, and general spacing is 200-400mm, and the diameter of spray gun spout is 1.3mm (d1), spray gun gradient is pressed
30 ° of angle sprays, spraying rear surface are matt band point, and surface covering is uniform, does not allow bottom drain vivid.Nozzle is vertical from object plane
Distance is 200mm；Obtaining the diameter of a circle that nozzle sprays on object plane by Pythagorean theorem is 230mm (d).
There is a relationship by the pressure and flow velocity of fluid:
P=v1 2/2g (3)
In formula (3), v1Speed when spray gun is sprayed for polyureas, P is the pressure in spray gun, equal to what is inputted in spray gun
Control pressure.
v1=4000mm/s
Q=v1A (4)
In formula (4), A is the cross-sectional area of spray tip.
A=π1 2/4
A=4.16mm2
Q=16640mm3 (5)
On one side required spray polyurea layer with a thickness of 1mm, v=72mm/s=can be obtained by formula (2) and formula (5)
0.072m/s, v are the speed for spraying one time.
The protective layer of the present embodiment has carried out multinomial performance test, wherein surface salt spray test 480 hours, meets test
It is required that；The test of surface Stone Shock, sprayed surface meets without bad phenomenons such as obvious destruction, crackings after Stone Shock 480 hours
Test requirements document；Surface drying 5min under room temperature after processing technology requirement spraying, processing technology requirement is low, applied widely；Coating thickness
Up to 0.5-3.5mm；Abrasion test is unsatisfactory for test requirements document；Higher cost；Meet electric vehicle chassis use condition.Polyureas spray
It applies processing performance and is better than PVC, cost is slightly higher, can select according to actual needs.
Embodiment 4
The present embodiment is substantially the same manner as Example 3, the difference is that:
S1, PVC coating is selected, shore hardness is 55 ± 5D after the paint solidification, tensile strength is 10MPa or more, tearing
Intensity is 90KN/m or more；
S2, above-mentioned PVC coating is sprayed to the Battery case surface by electrophoretic process, forms external coating 3, external coating 3
With a thickness of 1000 ± 200 microns, 25 DEG C -30 DEG C at a temperature of spray PVC coating.
The protective layer of the present embodiment has carried out multinomial performance test, wherein surface salt spray test 480 hours, meets test
It is required that；The test of surface Stone Shock, sprayed surface meets without bad phenomenons such as obvious destruction, crackings after Stone Shock 480 hours
Test requirements document；Processing technology requires hot setting (140-160 DEG C/30min) after requiring spraying, and technique, environmental requirement are high；Spraying
Thickness is up to 0.5-3.5mm；Abrasion test meets test requirements document；Cost is relatively low；Meet electric vehicle chassis use condition.
Comparative example 1
The protective layer of this comparative example is electrostatic powder coating after electrophoresis.The protective layer of the present embodiment has carried out multinomial performance survey
Examination, wherein surface salt spray test 480 hours, meet test requirements document；The test of surface Stone Shock, Stone Shock are sprayed after 480 hours
It applies surface to be destroyed, is unable to satisfy test requirements document；Processing technology requires hot setting (200 DEG C/20min), work after requiring spraying
Skill, environmental requirement are high；Coating thickness is 60-120 μm and not can increase；Abrasion test is unsatisfactory for test requirements document；Cost is relatively low；
It is unsatisfactory for electric vehicle chassis use condition.If increasing electrostatic spraying thickness, adhesive strength is just substantially reduced, and coating layer thickness is too
Thickness, easy sagging is uneven, fold, therefore Electrostatic Spraying of powder Coatings is coated with thickness limitation.
Comparative example 2
The protective layer of this comparative example is the painting layer that sprays after electrophoresis.The protective layer of the present embodiment has carried out multinomial performance
Test, wherein surface salt spray test 480 hours, meet test requirements document；Surface Stone Shock test, after Stone Shock 480 hours
Sprayed surface is destroyed, and is unable to satisfy test requirements document；Processing technology require spraying after require hot setting (150-170 DEG C/
30min), technique, environmental requirement are high；Coating thickness is 0.1-0.2 μm and not can increase；Abrasion test is unsatisfactory for test and wants
It asks；Cost is relatively low；It is unsatisfactory for electric vehicle chassis use condition.
From embodiment 3, embodiment 4, comparative example 1 and comparative example 2 as can be seen that Battery case surface protecting layer of the invention
And process for protecting significantly improve quick change battery pack corrosion resistance in actual use positioned at automobile chassis with it is wear-resisting
Property.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that this is only
For example, protection scope of the present invention is to be defined by the appended claims.Those skilled in the art without departing substantially from
Under the premise of the principle and substance of the present invention, many changes and modifications may be made, but these change and
Modification each falls within protection scope of the present invention.
Claims (10)
1. a kind of Battery case surface protecting layer, which is characterized in that it includes electrophoresis layer and external coating, and the external coating is coated in
In the electrophoresis layer, the external coating with a thickness of 1000 ± 200 microns, the external coating is that polymer made of spraying applies
Layer, the shore hardness after the external coating solidifies is 55 ± 5D, and the tensile strength after the external coating solidifies is 10MPa or more,
Tearing strength after the external coating solidifies is 90KN/m or more.
2. Battery case surface protecting layer as described in claim 1, which is characterized in that the external coating is polyurea coating.
3. Battery case surface protecting layer as described in claim 1, which is characterized in that the external coating is PVC coating.
4. a kind of Battery case surface protection process, which is characterized in that itself the following steps are included:
S1, select after solidifying that shore hardness is 55 ± 5D, tensile strength is 10MPa or more, tearing strength is 90KN/m's or more
Protective coating；
S2, the protective coating is sprayed to the Battery case surface by electrophoretic process, forms external coating, the external coating
With a thickness of 1000 ± 200 microns；
S3, solidification is stood at normal temperature.
5. Battery case surface protection process as claimed in claim 4, which is characterized in that coated in step s 2 using spray gun
The protective coating, the spraying direction of the spray gun and the surface of Battery case are in 25 degree of -35 degree angle, and with 0.1 ± 0.05m/s
Speed even application 3 times.
6. Battery case surface protection process as claimed in claim 4, which is characterized in that the protective coating is polyureas painting
Material.
7. Battery case surface protection process as claimed in claim 6, which is characterized in that when spraying the carbamide paint,
It keeps humidity to be higher than 85%, is 10 degree to 38 degree by painting surface temperature, and at least 3 degree higher than dew-point temperature by painting surface temperature.
8. Battery case surface protection process as claimed in claim 6, which is characterized in that after spraying the carbamide paint,
In polyurea coating level paint laid on, dry quartz sand is then spilled into inside finishing coat, then with roller quartz sand
It rolls into inside polyurea coating.
9. Battery case surface protection process as claimed in claim 4, which is characterized in that the protective coating is PVC coating.
10. Battery case surface protection process as claimed in claim 9, which is characterized in that 25 DEG C -30 DEG C at a temperature of
Spray PVC coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711352290.6A CN109926290A (en) | 2017-12-15 | 2017-12-15 | Battery case surface protecting layer and process for protecting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711352290.6A CN109926290A (en) | 2017-12-15 | 2017-12-15 | Battery case surface protecting layer and process for protecting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109926290A true CN109926290A (en) | 2019-06-25 |
Family
ID=66980347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711352290.6A Pending CN109926290A (en) | 2017-12-15 | 2017-12-15 | Battery case surface protecting layer and process for protecting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109926290A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1291941B1 (en) * | 2001-09-05 | 2014-03-19 | Samsung SDI Co., Ltd. | Active material for battery and method of preparing the same |
| CN104962142A (en) * | 2015-07-03 | 2015-10-07 | 河南锂动电源有限公司 | Automobile battery box body protective coating material and protection method thereof |
-
2017
- 2017-12-15 CN CN201711352290.6A patent/CN109926290A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1291941B1 (en) * | 2001-09-05 | 2014-03-19 | Samsung SDI Co., Ltd. | Active material for battery and method of preparing the same |
| CN104962142A (en) * | 2015-07-03 | 2015-10-07 | 河南锂动电源有限公司 | Automobile battery box body protective coating material and protection method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 胡传炘等: "《涂层技术原理及应用》", 30 September 2000, 化学工业出版社 * |
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