CN109520917A - The corrosion resistance test method of cell piece slurry - Google Patents
The corrosion resistance test method of cell piece slurry Download PDFInfo
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- CN109520917A CN109520917A CN201811644114.4A CN201811644114A CN109520917A CN 109520917 A CN109520917 A CN 109520917A CN 201811644114 A CN201811644114 A CN 201811644114A CN 109520917 A CN109520917 A CN 109520917A
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Abstract
The present invention provides a kind of corrosion resistance test methods of cell piece slurry, comprising the following steps: cell piece sample is placed in the acid solution of preset temperature by S1. impregnates preset time；S2. every cell piece sample is cut into preset shape according to back silver electrode pattern, the preset shape includes at least silver electrode region and Al-BSF region；S3. the silver-colored aluminium resistance between preset shape silver electrode region and Al-BSF region is tested；S4. the silver-colored aluminium resistance that test obtains is compared, assessment obtains the corrosion resistance of cell piece sample.The corrosion resistance test method of cell piece slurry disclosed by the invention, by introducing in battery-end to the corrosion resistance characteristic manner of slurry, do not need to be prepared into component, it can be with fast selecting performance more preferably cell piece sample, the method is convenient simple, is substantially shorter time and cost.
Description
Technical field
The invention belongs to area of solar cell, and in particular to a kind of corrosion resistance test method of cell piece slurry.
Background technique
Photovoltaic module as photoelectric conversion needs to be exposed to the complexity such as light, heat, oxygen, water for a long time using 25 years outdoors
In environment, this requires assembly materials to have good weatherability.In each material of component, the encapsulating material of encapsulation effect, mesh are played
Preceding encapsulating material common in the market is EVA, i.e. the polymer of ethylene and vinylacetate, but the material itself chemical structure is simultaneously
Unstable, hydrolysis occurs for meeting hydrothermal aging in use process, generates acetic acid, generates corrosion to the electrode of cell piece.Although
A variety of different additives such as ultraviolet absorber, UV light stabilizing agent, antioxidant and crosslinking agent can be added in EVA adhesive film
Its ageing-resistant performance is improved, but still there are many deficiencies, often occurs xanthochromia, delamination, bubble, corrosion electrical motor in use
Phenomena such as, seriously affect the performance and used life of component.
At present when solar battery imports new silver-colored aluminum slurry, require to carry out hydrothermal aging test to determine slurry
Reliability.Carrying out hydrothermal aging experiment, there are some defects for the change of same type slurry or the slight change of paste composition:
1. hydrothermal aging test needs for cell piece to be prepared into component, material is wasted, increases cost；
2. time-consuming for experiment, need thousands of a hours that can just obtain test result, be unfavorable for novel slurry assessment and import；
3. having strict demand to experimental situation, maintenance cost is high.
For the slurry change of same type or the slight change of paste composition, so complicated test time-consuming is unfavorable for newly producing
Product quickly introduce and cost of idleness.
Therefore, it is necessary to improve regarding to the issue above.
Summary of the invention
The purpose of the present invention is to provide a kind of corrosion resistance test methods of cell piece slurry, can effectively obtain slurry
The corrosion resistance of Dichlorodiphenyl Acetate, the test method is convenient simple, is substantially shorter experimental period and experimental cost.
For achieving the above object, the present invention provides a kind of corrosion resistance test methods of cell piece slurry, including
Following steps:
Cell piece sample is placed in the acid solution of preset temperature by S1 impregnates preset time；
Every cell piece sample is cut into preset shape according to back silver electrode pattern by S2, and the preset shape at least wraps
Include silver electrode region and Al-BSF region；
S3 tests the silver-colored aluminium resistance between preset shape silver electrode region and Al-BSF region；
S4 compares the silver-colored aluminium resistance that test obtains, and assessment obtains the corrosion resistance of cell piece sample.
S1, S2, S3, S4 are only used as label to use herein, do not limit sequence of steps.
As the further improvement of embodiment of the present invention, by by the preset time be two or more not
The cell piece sample is grouped with the period.
As the further improvement of embodiment of the present invention, the preset time that the cell piece sample grouping is impregnated is in
It is incremented by setting, the silver-colored aluminium resistance of preset shape on the cell piece sample in different time periods is impregnated in test respectively, according to test
Silver-colored aluminium resistance determine the corrosion tendency of the cell piece sample relative time, the cell piece sample is predicted according to corrosion tendency
Corrosion resistance superiority and inferiority, it is preferable that the preset times of the cell piece sample adjacent packets be incremented by after be before being incremented by least
Twice.
As the further improvement of embodiment of the present invention, the cell piece sample is different types of cell piece, described
Different types of cell piece carries out tri- steps of S1-S3 respectively, then the silver-colored aluminium resistance that test obtains is compared, and assessment obtains
The corrosion resistance superiority and inferiority of different types of cell piece sample, the longitudinal direction that can carry out one species battery sheet resistance values are right
Than that can also handle the value obtained after same preset time to different types of cell piece and be compared, difference can also be compared
The resistance change trend of type cell piece.
As the further improvement of embodiment of the present invention, the acid solution be acetum, the acetum it is dense
Degree is preferably 0.1mol/L to 5mol/L, more preferably 0.5mol/L to 1mol/L.
As the further improvement of embodiment of the present invention, different types of cell piece is to choose different slurries to carry out
Print obtained cell piece.
As the further improvement of embodiment of the present invention, one of described different types of cell piece is to pass through anti-corruption
The spec battery piece of corrosion test, the corrosion resistance superiority and inferiority according to other kinds of cell piece samples relative to spec battery piece determine
Other kinds of cell piece samples are spec battery piece or unqualified battery piece.
As the further improvement of embodiment of the present invention, the preset shape is chosen in the middle part of every cell piece sample
At least one conductive component in the 3X3 conductive component in region.
As the further improvement of embodiment of the present invention, the cell piece sample chooses at least three pieces cell piece；Every
The cell piece sample chooses at least three preset shapes that central region is cut into.
As the further improvement of embodiment of the present invention, using the ohmmeter test silver-colored aluminium resistance, a probe is connect
Touching tests the electricity between silver-colored aluminium in the position in the Al-BSF region in the position in the silver electrode region, a probe contact
Resistance.
Compared with prior art, the corrosion resistance test method of cell piece slurry disclosed by the invention, by battery-end
The corrosion resistance characteristic manner to slurry is introduced, environment of the simulated battery piece after being prepared into component, what record was occurred becomes
Gesture and variation do not need to be prepared into component, can be with fast selecting performance more preferably cell piece sample, and the method is convenient simple, with
Hydrothermal aging has comparativity, is substantially shorter time and cost, is conducive to new slurry and imports.
Detailed description of the invention
Fig. 1 is the floor map of the monolithic battery piece sample in the preferred embodiment of the present invention；
Fig. 2 is the enlarged diagram of the preset shape of the cell piece sample cutting in Fig. 1；
Fig. 3 is the Ag-Al resistance comparison diagram for not impregnating two groups of slurries of acetum in invention preferred embodiment；
Fig. 4 is that two groups of slurries impregnate the Ag-Al resistance comparison diagram after acetum 8h in Fig. 3；
Fig. 5 is that the first slurry in Fig. 4 impregnates the SEM image after acetum 8h；
Fig. 6 is that second of slurry in Fig. 4 impregnates the SEM image after acetum 8h；
Fig. 7 is to be prepared into component using the manufactured cell piece of the first slurry in Fig. 3, tests EL after carrying out DH2000
Image；
Fig. 8 is to be prepared into component using the manufactured cell piece of second of slurry in Fig. 3, tests EL after carrying out DH2000
Image.
Specific embodiment
Below with reference to specific embodiment shown in the drawings, the present invention will be described in detail.But these embodiments are simultaneously
The present invention is not limited, structure that those skilled in the art are made according to these embodiments, method or functionally
Transformation is included within the scope of protection of the present invention.
It should be understood that the art of the representation space relative position used herein such as "upper", " top ", "lower", " lower section "
Language be for convenient for explanation purpose come describe as shown in the drawings a unit or feature relative to another unit or spy
The relationship of sign.The term of relative space position can be intended to include equipment in use or work other than orientation as shown in the figure
Different direction.
Embodiment one
In the preferred embodiment of the present invention, the corrosion resistance test method of cell piece slurry the following steps are included:
S1, cell piece sample of the same race is placed in the acid solution of preset temperature, preset concentration by impregnating different preset
Time；
S2, every cell piece sample after immersion is cut into preset shape, preset shape according to back silver electrode pattern
Including at least silver electrode region and Al-BSF region；
Silver-colored aluminium resistance between S3, test preset shape silver electrode region and Al-BSF region；
S4, comparison impregnate the corresponding silver-colored aluminium resistance of the different cell piece sample of the same race of preset time, obtain cell piece of the same race
The anticorrosive trend of sample.
In above-mentioned steps S1, the selection of preset temperature is carried out according to experiment purpose, and such as simulating extreme thermal environment can select
Higher temperature is selected so that close to simulated environment temperature, conventional then can choose 25 DEG C；Acid solution is acetum, certainly
It can be other acid approximate acid solution substitutions.The preset concentration of acetum can be selected according to actually required, such as be surveyed
Examination compares the corrosion resistance that different slurries prepare cell piece, can be selected according to the acid resistance of slurry；It such as needs to obtain cell piece
Variation tendency after being packaged into component over time generates second when hydrolysis can also occur according to EVA hydrothermal aging
The acidity of acid selects, and prepares the acetum of 1mol/L in the present embodiment in advance, and when testing different cell pieces, acetic acid is molten
The concentration of liquid can be between 0.05mol/L to 5mol/L, as 0.05mol/L, 0.1mol/L, 0.5mol/L, 2.0mol/L,
2.5mol/L,3mol/L,3.5mol/L,4.0mol/L,4.5mol/L,5.0mol/L.The preset concentration of acetum is default
It can be remained unchanged in time, also can choose and change stage by stage, preset during being 4h (hour) and 8h respectively such as preset time
Concentration is 1mol/L, can be 8h with preset time, and preceding 4h preset concentration is 1mol/L, and rear 4h preset concentration is 1.5mol/
L, this preset concentration variation and the selection of preset time are matched with test purpose, can be adjusted.The present embodiment is
Facilitate understanding and illustrate clear, selects preset concentration for 1mol/L, preset time is respectively 4h, 8h.
The present embodiment is by introducing corrosion resistance characteristic manner in battery-end, and simulated battery piece is after being prepared into component
Environment records trend and variation occurred, does not need to be prepared into component, can be with fast selecting performance more preferably cell piece sample
Product, the method is convenient simple, has comparativity with hydrothermal aging, is substantially shorter time and cost, is conducive to different cell piece samples
Selection application.
It is in above-mentioned steps S1, every cell piece sample is fixed in acetum, it ensure that cell piece sample can
Acetum is completely attached to, floating will not be generated.Preferably, cell piece sample can be fixed in small basket of flowers, then again
It is placed in acetum, it is easy to operate and fixed reliable.Wherein, fixed form of the cell piece sample in small basket of flowers can be with
It is to place vertically, and there is interval between every two panels cell piece, it is ensured that it is molten that each position of each cell piece touches acetic acid
Liquid.Certainly, cell piece sample is between the fixed form in small basket of flowers can be and have between horizontal positioned and every two panels cell piece
Every.Or it is also possible to the inclined angle of placement of multi-disc cell piece sample.
It is not the sequence for limiting these steps in addition, being directed to the number S1-S4 of above-mentioned steps, only explanation includes
There are these steps, such as above-mentioned steps S1 and step S2, can be first to impregnate and be cut again, be also possible to first cut again
It is impregnated.It as depicted in figs. 1 and 2, is full wafer cell piece sample 100 shown in Fig. 1, each cell piece sample is equipped with multiple
Conductive component.Preferably first cell piece sample 100 is impregnated in the present embodiment, every cell piece sample 100 chooses middle part
Region is cut at least three preset shapes 10, and preset shape here is not intended to limit the shape after cutting, but after cutting
Preset shape 10 on need to have silver paste and aluminum slurry simultaneously, i.e., preset shape 10 includes silver electrode region 12 and Al-BSF
Region 11, in case subsequent carry out resistance detection.It chooses 3-5 preset shape in the present embodiment to be detected, it is furthermore preferred that default
Shape preferentially chooses at least one of the 3X3 conductive component from every 100 central region of cell piece sample.
In above-mentioned steps S3, ohmmeter test resistance, position of the probe contact in silver electrode region 12 can be used
It sets, a probe contact tests the silver-colored aluminium between silver electrode region 12 and Al-BSF region 11 in the position in Al-BSF region 11
Resistance.
The variation before and after acid solution is impregnated for convenience of control cell piece sample, above-mentioned test method is specially by battery of the same race
Piece sample is at least divided into two groups i.e. two group cell piece sample and impregnates different preset times, and the present embodiment is divided into three groups, impregnates default
Time is respectively 0h, 4h, 8h, i.e. first group of cell piece sample is cut directly into after preset shape without immersion and tests initial silver
Aluminium resistance, second group and third group impregnate 4h, 8h respectively in step sl and then carry out step S2-S3.
The present embodiment selection is placed in 25 DEG C by the cell piece that is prepared of A slurry printing, in the acetum of 1mol/L
0h, 4h, 8h are impregnated, is cut into according to back silver electrode pattern including at least the pre- of silver electrode region and Al-BSF region after immersion
If shape, the silver-colored aluminium resistance between preset shape silver electrode region and Al-BSF region is tested, acquired results are as follows:
| Soaking time | 0h | 4h | 8h |
| Ag-Al resistance test (m Ω) | 76 | 114 | 1134 |
Under the acetic acid processing of same concentration, it is by the cell piece 0-4h resistance variations difference that the printing of A slurry is prepared
38m Ω, 4-8h resistance variations difference is 1020m Ω, it is seen that as time goes by, prints the cell piece being prepared by A slurry
Resistance difference is gradually increased, and time longer difference is bigger, and the stability of difference more big battery piece is poorer.
Embodiment two
The present embodiment selection is placed in the acetum of 25 DEG C, 0.5mol/L by the cell piece that the printing of B slurry is prepared
Interior immersion 0h, 4h, 8h are cut into according to back silver electrode pattern including at least silver electrode region and Al-BSF region after immersion
Preset shape tests the silver-colored aluminium resistance between preset shape silver electrode region and Al-BSF region, other and embodiment one are identical,
Acquired results are as follows:
| Soaking time | 0h | 4h | 8h |
| Ag-Al resistance test (m Ω) | 76 | 85 | 260 |
It is 9m Ω by the cell piece 0-4h resistance variations that the printing of B slurry is prepared under the acetic acid processing of same concentration,
4-8h resistance variations are 175m Ω, it is seen that as time goes by, by the cell piece resistance difference that is prepared of B slurry printing also by
It is cumulative big, but its increase tendency prints the cell piece being prepared far below A slurry.
Embodiment three
The present embodiment is placed in interior immersion 0h, 3h of acetum of 30 DEG C, 2.5mol/L, remaining operation and condition are the same as implementation
Example one.
| Soaking time | 0h | 3h |
| Ag-Al resistance test (m Ω) | 76 | 273 |
Example IV
The present embodiment is placed in interior immersion 0h, 2h of acetum of 20 DEG C, 5mol/L, remaining operation and the same embodiment of condition
One.
| Soaking time | 0h | 2h |
| Ag-Al resistance test (m Ω) | 76 | 342 |
In above-described embodiment, cell piece sample of the same race is chosen according to different time sections grouping is impregnated, according to every group of test
Silver-colored aluminium resistance determines the corrosion tendency of cell piece sample relative time, predicts the anticorrosive of the cell piece sample according to corrosion tendency
Performance superiority and inferiority.
Embodiment five
In the preferred embodiment of the present invention, the corrosion resistance test method of cell piece slurry the following steps are included:
S1, at least two cell piece samples are placed in the acid solution of preset temperature and impregnate preset time；
S2, every cell piece sample is cut into preset shape according to back silver electrode pattern, preset shape includes at least
Silver electrode region and Al-BSF region；
Silver-colored aluminium resistance between S3, test preset shape silver electrode region and Al-BSF region；
S4, the corresponding silver-colored aluminium resistance of at least two cell piece samples that test obtains is compared, assessment obtains at least
The corrosion resistance superiority and inferiority of two kinds of cell piece samples.
In above-mentioned steps S1, acid solution is acetum, naturally it is also possible to it is other acid approximate acid solution substitutions,
The concentration of acetum can be selected according to actually required, and such as test compares the corrosion resistance that different slurries prepare cell piece,
It can be selected according to the acid resistance of slurry；Such as need to obtain the variation tendency of cell piece after being packaged into component over time,
The acidity of acetic acid is generated to select when hydrolysis can also occur according to EVA hydrothermal aging, is prepared in advance in the present embodiment
The acetum of 1mol/L, when testing different cell pieces, the concentration of acetum can be 0.1mol/L to 5mol/L it
Between, as 0.05mol/L, 0.1mol/L, 0.5mol/L, 2.0mol/L, 2.5mol/L, 3mol/L, 3.5mol/L, 4.0mol/L,
4.5mol/L,5.0mol/L.The preset concentration of acetum can remain unchanged within a preset time, also can choose stage by stage
Variation, if preset time is 8h, preceding 4h preset concentration is 1mol/L, and rear 4h preset concentration is 1.5mol/L, this preset concentration
The selection of variation is matched with test purpose, can be adjusted.
At least two cell piece samples refer to the variety classes printed using different slurries in the present embodiment
Cell piece, by battery-end introduce corrosion resistance characteristic manner, environment of the simulated battery piece after being prepared into component can
With fast selecting performance more preferably cell piece sample, the method is convenient simple, has comparativity with hydrothermal aging, when being substantially shorter
Between and cost, conducive to the selection application of different cell piece samples.
In above-mentioned steps S1, at least two cell piece samples are the cell piece that every kind of cell piece sample chooses same technique
It is several, it is ensured that the accuracy of experimental result.Fixation of the every cell piece sample in acetum ensure that cell piece sample energy
Enough completely attach to arrives acetum, will not generate floating.Preferably, cell piece sample can be fixed in small basket of flowers, then
It is placed in acetum again, it is easy to operate and fixed reliable.Wherein, fixed form of the cell piece sample in small basket of flowers can
To be to place vertically, and there is interval between every two panels cell piece, it is ensured that each position of each cell piece touches acetic acid
Solution.Certainly, cell piece sample can be between horizontal positioned and every two panels cell piece in the fixed form in small basket of flowers and have
Interval.Or it is also possible to the inclined angle of placement of multi-disc cell piece sample.
A kind of cell piece can be the spec battery piece tested by corrosion resistance.It is to test two kinds of cell pieces of D1, D2
Example, if one such spec battery piece to be tested by corrosion resistance, or perhaps known spec battery piece, such as
The cell piece used always, by the determining spec battery piece of DH2000 experiment, then can be opposite according to another cell piece
Determine that another cell piece is spec battery piece or unqualified battery piece in the corrosion resistance superiority and inferiority of spec battery piece.For example,
If D1 is spec battery piece, by the silver of the preset shape detected after the D1 and D2 immersion acid solution same period on D1 and D2
Aluminium resistance, D1 are greater than D2, illustrate that the corrosion resistance ratio D1 of D2 is excellent, then D2 is spec battery piece；D1 is less than D2, illustrates D2's
Corrosion resistance is not so good as D1, then D2 is unqualified battery piece.Can quickly judge preferred sample in advance in this way with import production or
Person carries out subsequent test, avoids every kind of sample and all does lengthy and tedious test, to reduce the cost of new product introduction.
In above-described embodiment, chooses variety classes cell piece and impregnate same time, according to the silver-colored aluminium of every kind of cell slice test
Resistance determines the corrosion resistance superiority and inferiority of the variety classes cell piece.
In addition, preset time can also be two or more different time sections to every kind of electricity by above-mentioned test method
The step of pond piece is grouped, and such as every kind of cell piece is recorded according to embodiment one is operated.Under normal circumstances, the difference of selection
The initial silver-colored aluminium resistance of the cell piece sample of slurry is not much different, but after impregnating, the variation of the order of magnitude occurs for silver-colored aluminium resistance, than
Such as from tens of grades to hundreds of grades, hundreds of grades to thousands of grades can be seen that silver-colored aluminium electricity by impregnating the comparison of silver-colored aluminium resistance of front and back
Whether resistance has occurred the variation of the order of magnitude, in this way, it is determined that the accuracy of test result；As not being, reason is analyzed, if
Be that soaking time is too short or detection process in go wrong, to further confirm that the reliability of testing result.
It, equally can will at least two it is of course also possible to do not know which kind of cell piece sample is spec battery piece in advance
Kind every kind of cell piece of cell piece is divided at least two groups, and the preset time period presentation that each group cell piece impregnates, which is added, sets, and tests respectively
The silver-colored aluminium resistance for impregnating preset shape at least two cell pieces sample in different time periods is determined according to the silver-colored aluminium resistance of test
The corrosion tendency of at least two cell pieces sample relative time predicts the anti-corruption of at least two cell piece according to corrosion tendency
Corrosion energy superiority and inferiority.
For example two kinds of every kind of cell piece samples of M, N are respectively classified into two groups, first group of cell piece M1, N1 sample impregnates first
Preset time period, second group of cell piece sample M2, N2 impregnate the second preset time period, wherein the second preset time is greater than first in advance
If the time, the resistance and second group of electricity between the silver-colored aluminium of first group of upper multiple preset shape of cell piece sample M1, N1 are tested respectively
Resistance between the silver-colored aluminium of the upper multiple preset shapes of pond piece sample M2, N2, according to the electricity between aluminium silver-colored on two groups of cell piece samples
Resistance chooses a kind of slower electricity of corrosion rate relatively come the corrosion tendency for determining two kinds of cell piece sample relative times of M, N like that
Pond piece sample is preferred.For convenience of comparison, the second preset time period is preferably at least twice of the first preset time period, i.e. battery
It is at least twice before being incremented by after the preset time of piece sample adjacent packets is incremental.Such as first preset time period be 4 hours, the
Two preset time periods are 8 hours.It certainly, can also be every by two kinds of cell piece samples of M, N to keep the accuracy of test result higher
Kind be respectively classified into three groups, four groups perhaps every group of more multiple groups impregnate respectively third preset time period, the 4th preset time period or its
Its preset time period can increase between each period in multiple, be also possible to equivalent growth.
Either grouping impregnates or only selects one group to be impregnated, and the quantity of every group of cell piece sample is identical, includes
At least three pieces cell piece sample, that is to say, that under same testing conditions, the cell piece sample for choosing immersion is at least three pieces, with
Ensure testing result deviation small as far as possible.
It further, can be with if having picked out preferably a kind of cell piece of corrosion resistance during previous experiments
Using the cell piece as reference sample, it will not determine that the cell piece sample of corrosion resistance is placed in the acid solution of preset temperature
It impregnates and impregnates an identical preset time period or multiple preset time periods with the reference sample, do not determined continuing with this anti-
The cell piece sample of corrosive nature executes step S2 to S3, by the corresponding silver-colored aluminium electricity of the cell piece sample for not determining corrosion resistance
It hinders silver-colored aluminium resistance corresponding with reference sample to compare, according to the cell piece sample of not determining corrosion resistance relative to reference
The corrosion resistance superiority and inferiority of sample determines that this does not determine that the cell piece of corrosion resistance is spec battery piece or unqualified battery piece.
It is arranged in pairs or groups silver paste of the same race with two different Al slurry, is tested specifically according to a kind of above-mentioned test method below
It is bright.
Compound concentration is the acetum of 1mol/L in a reservoir, the first cell piece sample of same technique (is used
Slurry A) and second of cell piece sample (use slurry B) of same technique be placed in small basket of flowers, being placed on temperature is 25 DEG C
Acetum in impregnate 0h, 4h, 8h respectively.
Then every cell piece sample 10 is cut into shape shown in Fig. 2 according to back silver electrode pattern, that is, cut
Shape includes silver electrode region 12 and Al-BSF region 11, can choose the region in the middle part of cell piece sample and is cut, choosing
Shape after taking 3-5 cutting carries out resistance test.
| Soaking time | 0h | 4h | 8h |
| A resistance test (m Ω) | 76 | 114 | 1134 |
| B resistance test (m Ω) | 76 | 87.4 | 299 |
Shown in table, Fig. 3 and Fig. 4 as above, it can see from the Ag-Al resistance test of cell piece sample, do not carrying out acetic acid
Resistance level between the experimental group of immersion, slurry A and slurry B and back silver is suitable, is ten Europe grade, but carry out acetic acid and impregnate 8h
Afterwards, the resistance between slurry A and silver paste is kilo-ohm grade, and the resistance between slurry B and silver paste is hundred Europe grade, it is seen that slurry B's is resistance to
Corrosive nature is more preferable.
Shown in referring to figure 5 and figure 6, it can be seen that, after acetic acid impregnates 8h, slurry A has been corroded not substantially from SEM image
It can see aluminium ball pattern, and slurry B can also be seen that complete aluminium ball pattern in bottom.
Referring to shown in Fig. 7 and Fig. 8, the cell piece of two kinds of slurries is prepared into component, tests EL after carrying out DH2000, is found
It obviously can see at main grid and black on slurry A, and slurry B is then without this phenomenon, it is consistent with silver-colored aluminium resistance test result.Also
Illustrate that the corrosion resistance of slurry B is better than slurry A.
By using the corrosion resistance test method of above-mentioned cell piece slurry, the equipment that test process needs is common set
It is standby, it can be to test the corrosion resistance for obtaining slurry Dichlorodiphenyl Acetate in the short time, the time spends less, and it is at low cost, it is led conducive to new slurry
Enter.
It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one
A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say
As a whole, the technical solution in each embodiment may also be suitably combined to form those skilled in the art can for bright book
With the other embodiments of understanding.
The series of detailed descriptions listed above only for feasible embodiment of the invention specifically
Protection scope bright, that they are not intended to limit the invention, it is all without departing from equivalent implementations made by technical spirit of the present invention
Or change should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of corrosion resistance test method of cell piece slurry, which comprises the following steps:
Cell piece sample is placed in the acid solution of preset temperature by S1 impregnates preset time；
Every cell piece sample is cut into preset shape according to back silver electrode pattern by S2, and the preset shape includes at least silver
Electrode zone and Al-BSF region；
S3 tests the silver-colored aluminium resistance between preset shape silver electrode region and Al-BSF region；
S4 compares the silver-colored aluminium resistance that test obtains, and assessment obtains the corrosion resistance of cell piece sample.
2. the corrosion resistance test method of cell piece slurry according to claim 1, which is characterized in that
By being that two or more different time sections are grouped the cell piece sample by the preset time.
3. the corrosion resistance test method of cell piece slurry according to claim 2, which is characterized in that
The preset time presentation that the cell piece sample grouping is impregnated, which is added, sets, and institute in different time periods is impregnated in test respectively
The silver-colored aluminium resistance for stating preset shape on cell piece sample determines the cell piece sample relative time according to the silver-colored aluminium resistance of test
Corrosion tendency, it is preferable that the preset times of the cell piece sample adjacent packets be incremented by after be at least twice before being incremented by.
4. the corrosion resistance test method of cell piece slurry according to claim 1 to 3, which is characterized in that
The cell piece sample is different types of cell piece, and different types of cell piece carries out S1-S3 tri- steps respectively
Suddenly, then by the silver-colored aluminium resistance that test obtains compare, the corrosion resistance that assessment obtains different types of cell piece is excellent
It is bad.
5. the corrosion resistance test method of cell piece slurry according to claim 4, which is characterized in that the acid solution is
Acetum, the concentration of the acetum are preferably 0.1mol/L to 5mol/L, more preferably 0.5mol/L to 1mol/
L。
6. the corrosion resistance test method of cell piece slurry according to claim 4, which is characterized in that the variety classes
Cell piece be the cell piece choosing different slurries and being printed.
7. the corrosion resistance test method of cell piece slurry according to claim 4, which is characterized in that the variety classes
One of cell piece be the spec battery piece tested by corrosion resistance, according to the cell piece of other types relative to qualification
The corrosion resistance superiority and inferiority of cell piece determines that other kinds of cell pieces are spec battery piece or unqualified battery piece.
8. the corrosion resistance test method of cell piece slurry according to claim 1, which is characterized in that the preset shape
Choose at least one conductive component in the 3X3 conductive component from every cell piece sample central region.
9. the corrosion resistance test method of cell piece slurry according to claim 1, which is characterized in that the cell piece sample
Product choose at least three pieces cell piece；The every cell piece sample chooses at least three preset shapes that central region is cut into.
10. the corrosion resistance test method of cell piece slurry according to claim 1, which is characterized in that use ohmmeter
The silver-colored aluminium resistance is tested, a probe contact is in the position in the silver electrode region, and a probe contact is in the Al-BSF
The resistance between silver-colored aluminium is tested in the position in region.
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| CN113686763A (en) * | 2021-07-20 | 2021-11-23 | 华南理工大学 | Evaluation method for vulcanization resistance |
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Address after: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Applicant after: CSI Cells Co.,Ltd. Applicant after: Atlas sunshine Power Group Co.,Ltd. Address before: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Applicant before: CSI Cells Co.,Ltd. Applicant before: CSI SOLAR POWER GROUP Co.,Ltd. |
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