CN108335992A - Imbrication battery is bonded tensile test print and preparation method thereof and test method - Google Patents
Imbrication battery is bonded tensile test print and preparation method thereof and test method Download PDFInfo
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- CN108335992A CN108335992A CN201810323795.8A CN201810323795A CN108335992A CN 108335992 A CN108335992 A CN 108335992A CN 201810323795 A CN201810323795 A CN 201810323795A CN 108335992 A CN108335992 A CN 108335992A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 238000010998 test method Methods 0.000 title claims abstract description 17
- 238000009864 tensile test Methods 0.000 title claims description 9
- 238000012360 testing method Methods 0.000 claims abstract description 169
- 239000000853 adhesive Substances 0.000 claims abstract description 38
- 230000001070 adhesive effect Effects 0.000 claims abstract description 38
- 238000005520 cutting process Methods 0.000 claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 17
- 238000003466 welding Methods 0.000 claims description 15
- 239000002390 adhesive tape Substances 0.000 claims description 11
- 239000003292 glue Substances 0.000 claims description 8
- 238000007711 solidification Methods 0.000 claims description 7
- 230000008023 solidification Effects 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000013307 optical fiber Substances 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 7
- 229910052709 silver Inorganic materials 0.000 description 7
- 239000004332 silver Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000002503 electroluminescence detection Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 241001515806 Stictis Species 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000013441 quality evaluation Methods 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000005464 sample preparation method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
- H01L31/0512—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module made of a particular material or composition of materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
- H01L22/10—Measuring as part of the manufacturing process
- H01L22/12—Measuring as part of the manufacturing process for structural parameters, e.g. thickness, line width, refractive index, temperature, warp, bond strength, defects, optical inspection, electrical measurement of structural dimensions, metallurgic measurement of diffusions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The present invention relates to a kind of test samples being bonded pulling force for testing imbrication battery, the test sample is overlapped to form by two small pieces battery cutting sheet imbrications, wherein, the positive main gate line of the small pieces battery cutting sheet in two small pieces battery cutting sheets is with the cathode main grid line overlap of another small pieces battery cutting sheet and be bonded by conductive adhesive.The invention further relates to a kind of preparation method being used to prepare the test sample and a kind of test methods being bonded pulling force for testing imbrication battery.
Description
Technical field
The present invention relates to a kind of test sample being used to test imbrication battery bonding pulling force, one kind being used to prepare this test
The preparation method of print and a kind of test method for testing imbrication battery bonding pulling force.In particular it relates to too
Battery passes through conduction with battery in positive energy crystal silicon imbrication cell module encapsulation application field more particularly to a kind of imbrication battery component
The test method of the bonding pulling force of adhesive imbrication interconnection.
Background technology
As the conventional fossil energy consumption speed such as worldwide coal, oil, natural gas is accelerated, ecological environment constantly deteriorates,
Especially greenhouse gas emission causes increasingly serious Global climate change, the sustainable development of human society to be subjected to seriously
It threatens.Respective energy development strategy is formulated in countries in the world one after another, with the finiteness of the conventional fossil energy resources of reply and exploitation
Utilize the environmental problem brought.Solar energy is by its reliability, safety, popularity, longevity, the feature of environmental protection, resource adequate
The characteristics of have become one of most important regenerative resource, be expected to become the mainstay of the following global power supply.
Widely popularize and background using solar energy green energy resource under, imbrication battery component is first with the low damage of low current
Electrical principles (square direct proportionality of imbrication battery component power attenuation and operating current) are consumed so that component power
Loss substantially reduces.It generates electricity secondly by piece pitch area is made full use of in battery component, energy per unit area density
It is high.In addition used conductive adhesive instead of general components photovoltaic welding belt, since photovoltaic welding belt shows in full wafer battery
Go out higher series resistance and stroke that conductive adhesive forms circuit will be much smaller than mode using welding, to finally so that
The more conventional photovoltaic module performance of outdoor application reliability is better while imbrication battery component becomes efficient component, such as
The power dissipation characteristics in leakage current region of imbrication battery component, so that hot spot effect substantially reduces the harm of component.
Current imbrication battery component carries out bonding interconnection with battery to battery using conductive adhesive at main gate line position,
In for series welding complete battery strings need to carry out bonding tensile test.
In general, first method be use imbrication battery be used as match piece, when conductive adhesive by automatic double surface gluer with piece
And then conventional photovoltaic welding (width of usual welding and battery main gate line width value size one are used on battery after the completion of sizing
Cause or slightly wide 0.2mm) it is accurately pasted onto on conductive adhesive surface.Conductive adhesive connects the material of two media, on one side
Be imbrication battery entity silver paste main gate line, another side it is conventional photovoltaic welding (main component Sn60Pb40).According to using
Conductive adhesive recommend condition of cure under complete test sample solidification, solidification after the completion of be mounted on special fixture plate on and
Peel test is carried out to obtain conductive adhesive silver-colored with battery main gate line according to the tensile speed of setting on tensile testing machine
Bonding force size after slurry solidification.
The first method is using photovoltaic welding belt dielectric layer up-stripping power test is increased newly, due to a kind of newly-increased stanniferous and lead
Interface peel capacity of water of the photovoltaic welding belt of ingredient to introduce and conductive adhesive itself and imbrication battery entity silver paste portion
Interface peeling force magnitude relationship is simultaneously non-equal.There is prodigious uncertainty in this way, so that test result is drawn with Nian Jie
The deviation of power true value is larger, cannot play the role of quality of production control.
Second method is typically Ceramics as substrate, is then applied on its smooth finish surface by automatic double surface gluer
Glue, and ceramic substrate forms a kind of specific shape, typically a diameter of 5mm, be highly 10mm sizes class it is cylindric.By
Test sample solidification is completed under the condition of cure recommended according to the conductive adhesive used, is surveyed using thrust machine after the completion of solidification
Examination.The size of Nian Jie pulling force after conductive adhesive cures with ceramic substrate is assessed by obtaining the shearing force of horizontal direction.
But because ceramic material surface attribute itself and imbrication battery surface attribute difference are big, come on stricti jurise
Say the bonding pulling force size that cannot represent or fully reflect conductive adhesive to imbrication battery entity silver paste.
The third method is that the making of imbrication battery strings is carried out according to the condition of cure that the conductive adhesive used is recommended, and is waited for
Battery strings cure it is intact after made according still further to imbrication cell module encapsulation requirement and obtain intact imbrication battery component at
Product.The component can be placed in high/low temperature alternation environmental test chamber after the pretreatment of preliminary light decay and carry out loop test.Pass through
The pad value size of imbrication battery component front and back power under same testing standard before and after comparison inlet, to assess conductive adhesive
The size of Nian Jie pulling force after curing with battery entity silver paste.
The third method using be packaged into imbrication battery component so that by the reliability test of itself finished Components come
Bonding pulling force size of the conductive adhesive to imbrication battery entity silver paste is assessed, an inter-species can be used as from using angle this method
The test connect, but the result cannot be transformed into above bonding pulling force this mechanical units, and can not be directed to this key index
Carry out quantization test.The reliability test period is long simultaneously, generally at least needs 30 days.Testing cost and survey are undoubtedly increased in this way
Test result timeliness is poor, cannot rapidly instruct actual production well.
Test for conductive adhesive and imbrication battery entity silver paste interface shearing peeling force size, currently without one
Good stress medium layer subtest.
Invention content
Based on this, the present invention provide it is a kind of for testing the imbrication battery bonding test sample of pulling force, one kind is used to prepare
The preparation method of this test sample and a kind of test method for testing imbrication battery bonding pulling force, are based on imbrication
Battery itself adhesive interface layer and the material that need not introduce other assistant interfaces or different bonding surface nature, which can be completed, leads
The test of electric adhesive and imbrication battery entity silver paste bonding force, while it can be quickly obtained test result, to be led for material
Enter and actually use progress quickly comprehensive quality judging, while can preferably be serviced under the premise of not increasing testing cost
In terms of imbrication battery component produces and is allowed in the crucial processing procedure index such as bonding pulling force in effectively supervision range, to improve
The product quality of imbrication battery component provides a strong guarantee.
According to an aspect of the present invention, a kind of survey according to the present invention for testing imbrication battery bonding pulling force is proposed
Coupons, the test sample are overlapped to form by two small pieces battery cutting sheet imbrications, wherein one in two small pieces battery cutting sheets
The cathode main grid line overlap of the positive main gate line of small pieces battery cutting sheet and another small pieces battery cutting sheet simultaneously passes through conductive gluing
Agent is bonded.
A preferred embodiment of the invention, using coating technique identical with practical volume production.
A preferred embodiment of the invention, using monolithic glue consumption identical with practical volume production.
A preferred embodiment of the invention, the anode main gate line or the width of the cathode main gate line are
The width of 0.1~2mm, the overlapping region of the two small pieces battery cutting sheet are O.5~5mm.
A preferred embodiment of the invention, the test sample along the positive main gate line and/or institute
The width for stating the direction of cathode main gate line is 1-50mm.
The test sample completes under the process conditions same with practical volume production, and the test sample made can be with
Extension test is directly carried out in existing mechanics apparatus such as tensile testing machine, to obtain battery and electricity in imbrication battery component
The bonding value of thrust interconnected by conductive adhesive between pond.
According to another aspect of the invention, it is proposed that a kind of preparation method preparing above-mentioned test sample, the preparation side
Method includes the following steps：The cell piece is cut into multiple surveys along the positive main gate line of cell piece or the direction of cathode main gate line
Trial piece, the multiple test are positive main gate line with side of each of piece test with piece, and the other side is cathode main gate line；
The multiple test is overlapped with two tests in piece with piece imbrication, wherein described two tests are with a test in piece
Positive main gate line with piece is with another the cathode main grid line overlap of test with piece and be bonded by conductive adhesive；Along perpendicular to
Two tests after bonding are cut into multiple test samples by the direction of the anode main gate line or the cathode main gate line with piece.
A preferred embodiment of the invention, using coating technique identical with practical volume production.For example, using with
The identical monolithic glue consumption of practical volume production.Preferably, it is solid that gluing is carried out under the condition of cure recommended according to conductive adhesive
Change bonding.
It is calculated according to 0.1~2mm of main grid line width of current imbrication battery mainstream, and in view of imbrication manufacturing process shows money or valuables one carries unintentionally
It is bad, it is preferable that test method according to the present invention may be selected it is described two test with piece overlapping regions width be O.5~
5mm。
A preferred embodiment of the invention, the cell piece use five main gate line 156.75mm × 156.75mm
The cell piece of specification, the cell piece are cut into five tests by five deciles and match piece.Certainly, other specifications can also be used in the present invention
Cell piece, cutting number is also unrestricted, as long as side of the test with piece after cutting is positive main gate line, the other side is negative
Pole main gate line.For example, 6 cun of pieces of standard (6 inches × 6 inches) can be used, it is cut to 2 to 10 equal portions.
A preferred embodiment of the invention, along perpendicular to the positive main gate line or the cathode main gate line
Two tests after the bonding are cut into multiple test samples by direction according to the cutting spacing of 1-50mm with piece.
A preferred embodiment of the invention swashs the cell piece on infrared optical fiber Laser platform
Light, which cuts and is automatically performed, breaks piece, forms the multiple test and matches piece.It is further preferred that being carried out with piece to the multiple test
Appearance detects and/or electroluminescent detection.Thus, it is ensured that appearance and/or material itself of the test with piece are up-to-standard.
A preferred embodiment of the invention completes described two tests in automatic string welding machine and passes through institute with piece
The bonding of conductive adhesive is stated, while completing to cure in automatic string welding machine curing area.
A preferred embodiment of the invention, to two after the bonding on infrared optical fiber Laser platform
Test is cut by laser with piece, and by manually breaking piece, forms the multiple test sample.
According to another aspect of the invention, it is proposed that a kind of test method for testing imbrication battery bonding pulling force, institute
State test method using test sample as described above or using the test sample prepared by preparation method as described above into
Row test, the test method include the following steps：Extension test is carried out to the test sample.
A preferred embodiment of the invention, at the both ends of the test sample, in the test sample
Continuous pressing device for stereo-pattern, such as line paper self-adhesive tape in front and rear surfaces prevent from test sample being clipped in mechanics apparatus, such as tensile testing machine
When upper, test sample is caught broken.
It is further preferable that being subsequently used for being pressed from both sides by fixture by what the tape-stripping covered at the both ends of the test sample
Hold can clamping zone at least retain 1mm respectively, and it is described can the clamping zone imbrication weight apart from the test sample respectively
Folded region is less than 50mm.
It is further preferred that in addition to the imbrication overlapping region, the front and rear surfaces of the test sample are completely by adhesive tape
Paste covering.
A preferred embodiment of the invention, the test sample are pacified according to tensile testing machine working specification
Dress sets tensile speed as 1-10mm/min, starts and stretches operation until the test sample is bonded by conductive adhesive
Region be pulled off, read pulling force peak value later, obtained by pulling force peak value divided by the effective bond area of conductive adhesive folded
The intensity being bonded by conductive adhesive between watt battery.
A preferred embodiment of the invention carries out extension test to multiple test samples, multi-drawing is taken to survey
The average value of the result of examination is as final result.
Compared to conventional test method, test method according to the present invention not only can low cost but also can be rapidly and accurately
The bonding pulling force size that battery is interconnected with battery by conductive adhesive in assessment imbrication battery component, has imbrication battery component
Quality evaluation ability is mass produced, and there is actual test operating condition.
Description of the drawings
It is described in detail with reference to the accompanying drawings according to the preferred embodiment of the present invention for testing imbrication battery bonding pulling force
Test sample, be used to prepare this test sample preparation method and for test imbrication battery be bonded pulling force test side
Method.In attached drawing：
Fig. 1 is shown according to a kind of test sample of preferred embodiment of the present invention；
Fig. 2 shows be used to prepare the survey tested imbrication battery and be bonded pulling force according to a kind of preferred embodiment of the present invention
The flow chart of the preparation method of coupons；
Fig. 3 shows that piece is matched in two tests that cutting cell piece obtains；
Fig. 4 a and Fig. 4 b show two after being bonded by conductive adhesive tests with vertical view and main view respectively and match
Piece；
Fig. 5 is shown matches piece along two tests after the direction of main gate line cutting bonding.
Specific implementation mode
Fig. 1 is shown according to a kind of test sample 3 of preferred embodiment of the present invention.The test sample 3 is by two small pieces
Battery cutting sheet 5 and 6 imbrications overlap to form.In general, the positive main gate line of photovoltaic cell is located at the back side of cell piece, and cathode
Main gate line is located at the front of cell piece.In test sample shown in Fig. 1, two small pieces battery cutting sheets 5 and 6 it is face-up,
The positive main gate line of battery cutting sheet 5 in two small pieces battery cutting sheets 5 and 6 and another battery cutting sheet 6 in the case
Cathode main grid line overlap is simultaneously bonded by conductive adhesive.Coating technique identical with practical volume production is wherein used, for example, by using
Monolithic glue consumption identical with practical volume production.
It is calculated according to 0.1~2mm of main grid line width of current imbrication battery mainstream and considers that imbrication manufacturing process shows money or valuables one carries unintentionally
Bad, the width d2 of the overlapping region of two small pieces battery cutting sheets 5 and 6 is selected as 0.5~5mm.
The width d1 along main gate line direction of the test sample is 1-50mm.
The low viscous adhesive tape 4 of 1-50mm wide cut true qualities, for example U.S. line paper are pasted in the front and rear surfaces of the test sample 3
Adhesive tape.After tape-stripping covering, can be subsequently clamped by fixture can the width d4 of clamping zone at least retain 1mm and distance two is small
The overlapping region of piece battery cutting sheet 5 and 6 is less than 50mm (as shown in d3).Optionally, covering is pasted completely in addition to overlapping region
Adhesive tape.
Fig. 2 shows be used to prepare the survey tested imbrication battery and be bonded pulling force according to a kind of preferred embodiment of the present invention
The preparation method of coupons, wherein by taking 156.75mm × 156.75mm all five 2 battery imbrications as an example.
In step sl, using the cell piece of five main gate line 156.75mm × 156.75mm specifications, in infrared optical fiber laser
The direction of device platform upper edge cell piece anode main gate line or cathode main gate line is matched by the test that cell piece laser cutting is five equal portions
Piece, and be automatically performed and break piece.Obtained each side of the test with piece is positive main gate line, and the other side is cathode main gate line.
Later, appearance detection is carried out with piece for test, monolithic EL detection (electroluminescent detection) equipment is preferably used to complete EL detections,
Ensure that appearance and/or material itself of the test with piece are up-to-standard.
It is as shown in Figure 3 with piece 1 and 2 by obtained two tests of step S1.Piece 1 and 2 is matched in two tests shown in Fig. 3
It is face-up, be respectively equipped with cathode main gate line 11 and 21 in side of the test with piece 1 and 2, test with piece 1 and 2 it is another
Side is respectively equipped with positive main gate line (not shown) at the back side of the test with piece.
In step s 2, piece 1 and 2 imbrication bunchiness are matched into two tests in the automatic string welding machine of volume production, piece is matched in two tests
In positive main gate line of the test with piece 1 with another test to match the cathode main gate line 21 of piece 2 Chong Die and pass through conducting resinl
Stick is bonded.It is calculated according to 0.1~2mm of main grid line width of current imbrication battery mainstream, and in view of imbrication manufacturing process reveals
Bai Buliang, it is 0.5~5mm to select the width of two overlapping regions of the test with piece (as shown in d2 in Fig. 5).In addition, using with
The identical coating technique of practical volume production completes conducting resinl such as monolithic with glue consumption, while in the curing area of automatic string welding machine
The solidification of stick.Two tests after bonding match piece as shown in figures 4 a and 4b.
In step s3, then in infrared optical fiber Laser platform upper edge perpendicular to the side of positive main gate line or cathode main gate line
Two tests after bonding are cut into several equal portions (such as with piece to the cutting spacing according to 1-50mm (as shown in d1 in Fig. 1)
Shown in Fig. 5), and by manually breaking piece, form multiple test samples.Break piece needs to ensure test sample structural integrity and nothing in the process
Disrepair phenomenon.
Qualified test is screened successively along length of side 156.75mm and matches piece, and the test of these samplings is distributed in the entire length of side with piece
The position of about five equal portions of 156.75mm samples 5 test samples.
In step s 4, for 5 test samples of sampling, respectively use 1-50mm wide cuts the low viscous adhesive tape 4 of true qualities,
Such as line paper self-adhesive tape is pasted onto before and after it, is formed test sample 3 and can subsequently be pressed from both sides after wherein line paper self-adhesive tape pastes covering
Tool clamping can clamping zone at least retain 1mm (as shown in d4 in Fig. 1) and be less than (as shown in d2 in Fig. 1) from overlapping region
50mm (as shown in d3 in Fig. 1).Optionally, covering line paper self-adhesive tape is pasted completely in addition to overlapping region.
After making test sample, extension test can be carried out to it.Specifically, line paper self-adhesive tape will be pasted
Test sample is installed according to tensile testing machine working specification, is set tensile speed as 1-10mm/min, is opened after inspection is errorless
Dynamic to stretch operation until the region being bonded by conductive adhesive is pulled off separation, reading pulling force peak value, passes through pulling force peak at this time
Value divided by the effective bond area of conductive adhesive, which obtain in imbrication battery component, passes through conductive adhesive between battery and battery
The intensity of bonding.
Optionally, multiple (such as 5 times) sampling and testing takes its average value as final judgement result.
Protection scope of the present invention is only defined by the claims.Have benefited from the teachings of the present invention, those skilled in the art hold
Easily recognizing can be using the alternative structure of presently disclosed structure as feasible alternate embodiments, and can be by institute of the present invention
Disclosed embodiment is combined to generate new embodiment, or applies the present invention to other similar fields, it
Equally fall within the scope of the appended claims.
Claims (24)
1. a kind of test sample for testing imbrication battery bonding pulling force, the test sample is folded by two small pieces battery cutting sheets
It watt overlaps to form, wherein the positive main gate line of the small pieces battery cutting sheet in two small pieces battery cutting sheets and another small pieces electricity
The cathode main grid line overlap of pond cutting sheet is simultaneously bonded by conductive adhesive.
2. test sample according to claim 1, which is characterized in that the test sample is using identical with practical volume production
Coating technique.
3. test sample according to claim 2, which is characterized in that the test sample is using identical with practical volume production
Monolithic glue consumption.
4. test sample according to claim 1, which is characterized in that the anode main gate line or the cathode main gate line
Width is 0.1-2.0mm, and the width of the overlapping region of the two small pieces battery cutting sheet is 0.5-5.0mm.
5. test sample according to claim 1, which is characterized in that the test sample along the positive main gate line
Or the width in the direction of the cathode main gate line is 1-50mm.
6. test sample according to claim 1, which is characterized in that at the both ends of the test sample, in the survey
Continuous pressing device for stereo-pattern in the front and rear surfaces of coupons.
7. test sample according to claim 6, which is characterized in that by the adhesive tape at the both ends of the test sample
Paste covering be subsequently used for by fixture be clamped can clamping zone at least retain 1mm respectively, and it is described can clamping zone divide
50mm is not less than it apart from the overlapping region of the two small pieces battery cutting sheet.
8. test sample according to claim 7, which is characterized in that remove the overlapping region of the two small pieces battery cutting sheet
Except, the front and rear surfaces of the test sample are covered by tape-stripping completely.
9. a kind of being used to prepare the preparation method such as test sample described in any item of the claim 1 to 8, the preparation method
Include the following steps：
The cell piece is cut into multiple tests and matches piece along the positive main gate line of cell piece or the direction of cathode main gate line, it is described
Multiple tests are positive main gate line with side of each of piece test with piece, and the other side is cathode main gate line；
The multiple test is overlapped with two tests in piece with piece imbrication, wherein described two tests are with one in piece
Positive main gate line of the test with piece is with another the cathode main grid line overlap of test with piece and be bonded by conductive adhesive；
Two tests after bonding are cut into piece along perpendicular to the direction of the positive main gate line or the cathode main gate line
Multiple test samples.
10. preparation method according to claim 9, which is characterized in that use coating technique identical with practical volume production.
11. preparation method according to claim 10, which is characterized in that consumed with glue using monolithic identical with practical volume production
Amount.
12. preparation method according to claim 9, which is characterized in that the anode main gate line or the cathode main gate line
Width be 0.1-2.0mm, it is described two test with piece overlapping regions width be 0.5-5.0mm.
13. preparation method according to claim 9, which is characterized in that the cell piece is cut into 2-10 test and matches
Piece.
14. preparation method according to claim 9, which is characterized in that along perpendicular to the positive main gate line or described negative
Two tests after the bonding are cut into multiple test specimens by the direction of pole main gate line according to the cutting spacing of 1-50mm with piece
Piece.
15. preparation method according to claim 9, which is characterized in that at the both ends of the test sample, in the survey
Continuous pressing device for stereo-pattern in the front and rear surfaces of coupons.
16. preparation method according to claim 15, which is characterized in that by the glue at the both ends of the test sample
With paste covering be subsequently used for by fixture be clamped can clamping zone at least retain 1mm respectively, and it is described can clamping zone
The imbrication overlapping region apart from the test sample is less than 50mm respectively.
17. test sample according to claim 16, which is characterized in that except the test sample imbrication overlapping region it
Outside, the front and rear surfaces of the test sample are covered by tape-stripping completely.
18. the preparation method according to any one of claim 9 to 17, which is characterized in that flat in infrared optical fiber laser
The cell piece is cut by laser on platform and is automatically performed and breaks piece, the multiple test is formed and matches piece.
19. preparation method according to claim 18, which is characterized in that carry out appearance detection with piece to the multiple test
And/or electroluminescent detection.
20. the preparation method according to any one of claim 9 to 17, which is characterized in that completed in automatic string welding machine
Bonding of the piece by the conductive adhesive is matched in described two tests, while completing the conducting resinl in automatic string welding machine curing area
The solidification of stick.
21. the preparation method according to any one of claim 9 to 17, which is characterized in that flat in infrared optical fiber laser
Two tests after the bonding are cut by laser with piece on platform, and by manually breaking piece, form the multiple test specimens
Piece.
22. it is a kind of for test imbrication battery bonding pulling force test method, the test method utilize according to claim 1 to
Test sample or utilization described in any one of 8 pass through the preparation method according to any one of claim 9 to 21 and prepare
Test sample tested, the test method includes the following steps：
Extension test is carried out to the test sample.
23. test method according to claim 22, which is characterized in that the test sample is operated according to tensile testing machine
Specification is installed, and sets tensile speed as 1-10mm/min, is started and is stretched operation until the test sample passes through conduction
The region of adhesive bonding is pulled off, and is read pulling force peak value later, is passed through pulling force peak value divided by the effective bonding plane of conductive adhesive
Product obtains the intensity being bonded by conductive adhesive between imbrication battery.
24. test method according to claim 23, which is characterized in that carry out extension test to multiple test samples, take
The average value of the result of multi-drawing test is as final result.
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