CN109877488A - A kind of welding method and hot melt adhesive - Google Patents
A kind of welding method and hot melt adhesive Download PDFInfo
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- CN109877488A CN109877488A CN201910100777.8A CN201910100777A CN109877488A CN 109877488 A CN109877488 A CN 109877488A CN 201910100777 A CN201910100777 A CN 201910100777A CN 109877488 A CN109877488 A CN 109877488A
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- hot melt
- melt adhesive
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Abstract
The present invention provides a kind of welding method and hot melt adhesive, are related to solar-photovoltaic technology field, which comprises form hot melt adhesive fixed point on the primary gate electrode surface of solar battery sheet；The hot melt adhesive of the cooling hot melt adhesive fixed point is not plastic state；It will be provided with the solar battery sheet of not plastic state hot melt adhesive, moved to the series welding board of heated condition, so as to the hot melt gum softening and plastic state be presented；By the hot melt adhesive of plastic state, welding is fixed on to the primary gate electrode surface of the solar battery sheet；By the string welding machine, it will be fixed on the welding on the primary gate electrode surface of the solar battery sheet, be welded on the primary gate electrode surface of the solar battery sheet.The hot melt adhesive fixed point surface of plastic state is not smooth and do not have viscosity, convenient for packaging, the transport etc. of solar battery sheet；Welding is fixed on to the primary gate electrode surface of solar battery sheet by the hot melt adhesive of plastic state, convenient for precisely welding welding；Without carrying out additional transformation to string welding machine, welding cost is low.
Description
Technical field
The present invention relates to solar-photovoltaic technology fields, more particularly to a kind of welding method and hot melt adhesive.
Background technique
Photovoltaic module is usually connect by multiple solar batteries series winding, encapsulates and formed.Solar battery gang up often by multi-disc too
Positive energy cell piece welds to be formed by welding.
Currently, the process engineering of production solar battery string is substantially are as follows: welding is arranged in the sun according to scheduled spacing
On energy cell piece, the solar battery sheet for welding of arranging is transmitted to welding post, welding is soldered to solar battery sheet table
At the primary gate electrode in face.
Inventor has found following problem during studying welding welding: during welding is transmitted to welding post,
Welding is easy to produce displacement, so that there are larger displacement between welding and primary gate electrode, causes welding that cannot accurately weld.
Summary of the invention
The present invention provides a kind of welding method, it is intended to solve welding and be easy to produce position during being transmitted to welding post
It moves, causes welding that cannot accurately weld.The described method includes:
Hot melt adhesive fixed point is formed on the primary gate electrode surface of solar battery sheet；
The hot melt adhesive of the cooling hot melt adhesive fixed point is not plastic state；
It will be provided with the solar battery sheet of not plastic state hot melt adhesive, moved to the series welding board of heated condition, so that described
Simultaneously plastic state is presented in hot melt gum softening；
By the hot melt adhesive of plastic state, welding is fixed on to the primary gate electrode surface of the solar battery sheet；
By the string welding machine, it will be fixed on the welding on the primary gate electrode surface of the solar battery sheet, be welded on institute
State the primary gate electrode surface of solar battery sheet.
Optionally, the primary gate electrode surface in solar battery sheet forms hot melt adhesive fixed point, comprising: following steps
In any one:
On the primary gate electrode surface of solar battery sheet, dispensing forms hot melt adhesive fixed point；
On the primary gate electrode surface of solar battery sheet, injection forms hot melt adhesive fixed point；
On the primary gate electrode surface of solar battery sheet, silk-screen printing forms hot melt adhesive fixed point.
Optionally, the primary gate electrode surface in solar battery sheet, silk-screen printing are formed before hot melt adhesive fixed point,
Further include:
Make the corresponding printing screen of the hot melt adhesive fixed point；
The primary gate electrode surface in solar battery sheet, silk-screen printing form hot melt adhesive fixed point, comprising:
Set the primary gate electrode surface of the solar battery sheet in the printing face of the printing screen；
The hot melt adhesive with mobility is squeezed, makes the hot melt adhesive with mobility through the printing screen, in institute
The primary gate electrode surface of solar battery sheet is stated, printing forms hot melt adhesive fixed point.
Optionally, the primary gate electrode surface in solar battery sheet is formed before hot melt adhesive fixed point, further includes:
Hot melt adhesive is heated to the first preset temperature threshold, to reach default viscosity threshold.
Optionally, the quantity of the hot melt adhesive fixed point is less than or equal to preset quantity.
Optionally, on the direction vertical with the cloth set direction of main gate line, the size of the hot melt adhesive fixed point is less than etc.
In the first pre-set dimension.
Optionally, the hot melt adhesive includes: that the binder of the first default deal, the wax of the second default deal and third are default
The solvent of deal.
Optionally, the binder includes: polyvinyl butyral, ethyl cellulose, hydroxyethyl cellulose, acetate butyrate
At least one of cellulose, aldehyde ketone resin or hydrogenated rosin pentaerythritol ester.
It optionally, is polyvinyl butyral, acetylbutyrylcellulose and hydrogenated rosin pentaerythrite in the bonding agent
In the case where ester, the deal of the polyvinyl butyral is greater than the deal of the acetylbutyrylcellulose, and the polyethylene
The deal of butyral is greater than the deal of the hydrogenated rosin pentaerythritol ester.
Optionally, the wax includes: at least one of beeswax, Brazil wax, microwax or paraffin.
Optionally, in the case where the wax is microwax and paraffin, the deal of the paraffin is greater than the microwax
Deal.
Optionally, the solvent includes: ethylene glycol monobutyl ether, butyl, butyl acetate or third
At least one of ketone.
Optionally, the softening point temperature of the hot melt adhesive is lower than the second preset temperature threshold.
Optionally, the softening time of the hot melt adhesive is less than preset time threshold.
Optionally, the welding, comprising: at least one of round welding, triangle welding, shape welding band.
Optionally, the primary gate electrode includes: solid primary gate electrode, in the solid and spaced primary gate electrode of hollow out
One kind.
According to another aspect of the present invention, a kind of hot melt adhesive is also provided, comprising: the binder of the first default deal, second
The wax and third of default deal preset the solvent of deal.
In embodiments of the present invention, hot melt adhesive fixed point is formed on the primary gate electrode surface of solar battery sheet；Cooling institute
The hot melt adhesive of hot melt adhesive fixed point is stated as not plastic state；It will be provided with the solar battery sheet of not plastic state hot melt adhesive, moved to heating
The series welding board of state, so as to the hot melt gum softening and plastic state be presented；By the hot melt adhesive of plastic state, welding is fixed on described
The primary gate electrode surface of solar battery sheet；By the string welding machine, the primary gate electrode of the solar battery sheet will be fixed on
The welding on surface is welded on the primary gate electrode surface of the solar battery sheet.It is moving to series welding board, in primary gate electrode
Surface forms the hot melt adhesive fixed point of not plastic state, and the hot melt adhesive fixed point surface of plastic state is not smooth and do not have viscosity, is convenient for the sun
Packaging, the transport etc. of energy cell piece；When needing to weld, the string welding machine based on heated condition softens the hot melt adhesive, makes hot melt adhesive
Plastic state is presented, welding is bonded in the primary gate electrode surface of solar battery sheet by the hot melt adhesive of plastic state, is transmitted in welding
During welding post, welding will not or be not likely to produce displacement, convenient for precisely welding welding；Moreover, existing heated condition
String welding machine can soften the hot melt adhesive, so that plastic state is presented in hot melt adhesive, without carrying out additional transformation, welding cost to string welding machine
It is low；On the other hand, above-mentioned hot melt adhesive fixed point is just formed before moving to series welding board, not in series welding machine upper sealing glue, nothing
Sizing setting etc. need to be added in existing string welding machine, while without extra occupancy string welding machine, can promote the use of string welding machine
Efficiency, and promote welding efficiency.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by institute in the description to the embodiment of the present invention
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 shows the flow chart of one of the embodiment of the present invention one welding method；
Fig. 2 shows a kind of flow charts of welding method of the embodiment of the present invention two；
Fig. 3 shows a kind of primary gate electrode surface in solar battery sheet of the embodiment of the present invention two, screen printing scopiform
At the flow chart of hot melt adhesive fixed point.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
Embodiment one
Referring to Fig.1, the flow chart of one of the embodiment of the present invention one welding method is shown, can specifically include as follows
Step:
Step 101, hot melt adhesive fixed point is formed on the primary gate electrode surface of solar battery sheet.
In embodiments of the present invention, the main grid of the solar battery sheet can be more main grids or single main grid, more main grid sun
The solar battery sheet that energy cell piece can be more than or equal to 2 for main grid quantity does not in embodiments of the present invention limit this specifically
It is fixed.For example, the main grid of the solar battery sheet can be 3, alternatively, the main grid of the solar battery sheet can be 6, or
Person, the main grid of the solar battery sheet can be 20.
In embodiments of the present invention, hot melt adhesive fixed point can be formed on the primary gate electrode surface of solar battery sheet.
Specifically, hot melt adhesive fixed point can be formed in the main gate line on the primary gate electrode surface of solar battery sheet.Example
Such as, it can form hot melt adhesive by size applicator etc., in the main gate line on the primary gate electrode surface of solar battery sheet and fix
Point.Hot melt adhesive fixed point can be formed, or heat can be formed in solar battery sheet manufacturing process before welding welding
Melten gel fixed point.In embodiments of the present invention, this is not especially limited.
In embodiments of the present invention, optionally, the shape of hot melt adhesive fixed point can be round, rectangular or any other shape
Shape etc. is in embodiments of the present invention not especially limited this.
Specifically, corresponding hot melt adhesive can be arranged and fix according to actual aesthetic appearance and shading performance demand etc.
Dot shape.
In embodiments of the present invention, optionally, the quantity of the hot melt adhesive fixed point is less than or equal to preset quantity.Specifically
, the quantity of hot melt adhesive fixed point can be determined according to cementability, welding requirements of hot melt adhesive etc..The preset quantity equally may be used
To be determined according to the cementability of hot melt adhesive, welding requirements etc..For example, the preset quantity can be every primary gate electrode
Surface is 10.In embodiments of the present invention, this is not especially limited.
For example, 2 or 3 hot melt adhesive fixed points can be formed on the surface of every primary gate electrode, bonding is not only met
The demand of welding, moreover it is possible to interference of the reduction hot melt adhesive to welding as far as possible.
In embodiments of the present invention, welding and master due to the presence of hot melt adhesive fixed point, at hot melt adhesive fixed point position
Grid line or primary gate electrode surface do not contact directly, might have certain interference to the welding of subsequent welding, hot melt adhesive fixed point
Quantity is less than or equal to preset quantity, can reduce the interference to subsequent welding.Can be in the case where meeting cementability, it will be hot
The quantity of melten gel fixed point is arranged less.
In embodiments of the present invention, optionally, on the direction vertical with the cloth set direction of main gate line, the hot melt adhesive is solid
The size of fixed point is less than or equal to the first pre-set dimension.It can be laid on the direction vertical with the cloth set direction of main gate line for secondary grid
Direction.In embodiments of the present invention, this is not especially limited.
In embodiments of the present invention, in order to avoid the hot melt adhesive bonding after the softening is vertical with the cloth set direction of main gate line
The other assemblies such as the secondary grid on direction, or unnecessary adhesion is avoided, alternatively, in order to reduce interference of the hot melt adhesive to welding,
On the direction vertical with the cloth set direction of main gate line, the size of hot melt adhesive fixed point can be less than or equal to the first pre-set dimension,
First pre-set dimension can be set according to actual needs, for example, first pre-set dimension can be according to the ruler of main gate line
Very little, welding size, quantity of hot melt adhesive fixed point etc. are set.In embodiments of the present invention, this is not especially limited.
For example, the shape of hot melt adhesive fixed point if circle, then the diameter of the hot melt adhesive fixed point can be less than or equal to
0.4mm, that is, on the direction vertical with the cloth set direction of main gate line, the size of hot melt adhesive fixed point is less than or equal to 0.4mm, into
And the other assemblies such as secondary grid for avoiding the hot melt adhesive after the softening from being bonded on the direction vertical with the cloth set direction of main gate line, or keep away
Exempt from unnecessary adhesion, alternatively, reducing interference of the hot melt adhesive to welding.
In embodiments of the present invention, optionally, the primary gate electrode include: solid primary gate electrode, it is solid between hollow out
Every one of the primary gate electrode of setting.
Specifically, the main component of primary gate electrode is usually silver paste, primary gate electrode can be arranged to be solid with hollow out interval
Primary gate electrode, and then and then can reduce cost from the dosage for largely reducing silver paste；Meanwhile it is solid with engrave
Empty spaced primary gate electrode, which can also meet, absorbs needing for sunray etc..
In embodiments of the present invention, optionally, the primary gate electrode can also include: the primary gate electrode pad of interruption setting
And the main gate line that these primary gate electrode pads connect is formed together primary gate electrode.The primary gate electrode pad with main grid
Width on the vertical direction of the cloth set direction of line can be 0.8mm, so can from the dosage for largely reducing silver paste,
And then cost can be reduced；Meanwhile the primary gate electrode can also meet needing for absorption sunray etc..
In embodiments of the present invention, optionally, the width of primary gate electrode can be less than predetermined width, which can be with
It sets etc., in embodiments of the present invention, this is not especially limited according to actual needs.For example, the predetermined width can be with
For 0.85mm.
In embodiments of the present invention, the width of primary gate electrode can be less than predetermined width, and then can reduce cost；Together
When, which, which can also meet, absorbs needing for sunray etc..For example, the width of the primary gate electrode can be
0.8mm。
Step 102, the hot melt adhesive of the cooling hot melt adhesive fixed point is not plastic state.
It in embodiments of the present invention,, can be with after forming hot melt adhesive fixed point on the primary gate electrode surface of solar battery sheet
The hot melt adhesive of the cooling hot melt adhesive fixed point is not plastic state.In embodiments of the present invention, this is not especially limited.
Specifically, can be in the environment of the softening temperature lower than the hot melt adhesive, the cooling hot melt adhesive is not plastic state.Example
Such as, the hot melt adhesive of above-mentioned hot melt adhesive fixed point can be cooled down under normal temperature conditions as not plastic state.In embodiments of the present invention, to this
It is not especially limited.
In embodiments of the present invention, the hot melt adhesive of the cooling hot melt adhesive fixed point is not plastic state, usually the not hot melt of plastic state
Glue fixed point surface is smooth and does not have viscosity, convenient for the packaging and transport of the solar battery sheet.
Step 103, it will be provided with the solar battery sheet of not plastic state hot melt adhesive, moved to the series welding board of heated condition,
So as to the hot melt gum softening and plastic state be presented.
In embodiments of the present invention, which can heat, and can will be provided with the solar-electricity of not plastic state hot melt adhesive
Pond piece is moved to the series welding board of heated condition, so as to the hot melt gum softening and plastic state be presented.
Specifically, the solar battery sheet of not plastic state hot melt adhesive can be provided with by crawls such as mechanical arms to heated condition
Series welding board, the softening point temperature of the hot melt adhesive can be less than or equal to the temperature of the series welding board of the heated condition, and then will
It is provided with the solar battery sheet of not plastic state hot melt adhesive, is moved to the series welding board of heated condition, the string welding machine of heated condition
Platform can quickly soften the hot melt adhesive, so that plastic state is presented in the hot melt adhesive.
For example, the temperature of the series welding board of heated condition can be 68 DEG C, the softening point temperature of the hot melt adhesive can with 45 DEG C,
And then it will be provided with the solar battery sheet of not plastic state hot melt adhesive, it moves to the series welding board of heated condition, heated condition
Series welding board can quickly soften the hot melt adhesive, so that plastic state is presented in the hot melt adhesive.
In embodiments of the present invention, which can be softened by heated condition string welding machine, is glued so that hot melt adhesive is presented
State, without carrying out additional transformation to string welding machine, welding cost is low；Meanwhile above-mentioned hot melt adhesive fixed point is being moved to string welding machine
It is just formed before platform, can not promote the service efficiency of string welding machine without extra occupancy string welding machine in series welding machine upper sealing glue, and
Promote welding efficiency.
In embodiments of the present invention, optionally, the softening point temperature of the hot melt adhesive is lower than the second preset temperature threshold.It should
Second preset temperature threshold can not make this to have in embodiments of the present invention for the temperature etc. of the series welding board of heated condition
Body limits.
For example, the temperature of the series welding board of heated condition is 68 DEG C, then second preset temperature threshold can be 68 DEG C, should
The softening point temperature of hot melt adhesive can be 40-60 DEG C, lower than 68 DEG C of temperature of the string welding machine of heated condition, or lower than this second
Preset temperature threshold, and then the series welding board of heated condition can soften the hot melt adhesive, make hot melt adhesive that plastic state be presented, without to string
Welding machine is transformed.
In embodiments of the present invention, optionally, the softening time of the hot melt adhesive is less than preset time threshold.When this is default
Between threshold value can set etc. according to the actual situation, in embodiments of the present invention, this is not especially limited.
For example, the softening time of hot melt adhesive can be less than 2s, on the series welding board of heated condition only need to less than 2s when
Between, the hot melt adhesive can be softened, and make the hot melt adhesive that plastic state be presented, and then can be with the fast softening hot melt adhesive.
Step 104, by the hot melt adhesive of plastic state, welding is fixed on to the primary gate electrode surface of the solar battery sheet.
In embodiments of the present invention, by the hot melt adhesive of plastic state, welding is fixed on to the primary gate electrode of solar battery sheet
Surface.
Specifically, the string welding machine can have and grasp equal weldings and pull mechanism, can grasping by string welding machine, pull
Welding and the primary gate electrode surface that welding is placed on to solar battery sheet, pass through the primary gate electrode surface plastic state of solar battery sheet
Hot melt adhesive, welding is fixed on to the primary gate electrode surface of solar battery sheet.
In embodiments of the present invention, the hot melt adhesive of above-mentioned plastic state can have good viscosity, so can quickly by
Welding is fixed on the primary gate electrode surface of solar battery sheet.
In embodiments of the present invention, optionally, the welding, comprising: round welding, triangle welding, in shape welding band
At least one.
Specifically, can be reflected onto after sunray is radiated at round welding, triangle welding, shape welding belt surface
The surface of solar battery sheet, as vertical incidence or the sunray of oblique fire can also be by round weldings, triangle welding, abnormity
The surface reflection of welding takes full advantage of the sunray of all directions, reduces due to weldering to the surface of solar battery sheet
Sunray caused by the blocking of band loses.
In embodiments of the present invention, optionally, the size of the welding is less than pre-set dimension threshold value.Specifically, in order to subtract
Small welding blocks sunray, the width equidimension of welding can be arranged smaller in the case where meet demand.Example
Such as, if welding is round welding, the diameter of welding can be less than or equal to 1mm, for example, the diameter of round welding is 0.4mm, in turn
Welding can be reduced to block sunray.For another example if welding is shape welding band, the laying side of shape welding band and main gate line
Width on vertical direction can be 0.45mm.
Step 105, by the string welding machine, it will be fixed on the welding on the primary gate electrode surface of the solar battery sheet,
It is welded on the primary gate electrode surface of the solar battery sheet.
In embodiments of the present invention, by above-mentioned string welding machine, the primary gate electrode surface of solar battery sheet will be fixed on
Welding is welded on the primary gate electrode surface of solar battery sheet.
In embodiments of the present invention, it since welding is before being transmitted to welding post, is fixed on by the hot melt adhesive of plastic state
The surface of solar battery sheet primary gate electrode, and then during welding is transmitted to welding post, welding will not or be not easy
Displacement is generated, convenient for precisely welding welding.
It in embodiments of the present invention, optionally, can be in the heated condition before welding post in order to promote welding efficiency
Soften the hot melt adhesive on series welding board, make the hot melt gum softening and plastic state is presented, while plastic state can be passed through before welding post
The fixed welding of hot melt adhesive, the solar battery sheet for being fixed with welding is then transmitted to welding post, solar energy will be fixed on
The welding on the primary gate electrode surface of cell piece is welded on the primary gate electrode surface of solar battery sheet.Soften the hot melt adhesive, it is fixed
Welding is completed before welding post, without extra occupancy welding post, improves the utilization efficiency of welding post.It can weld
While connecing welding, soften hot melt adhesive and fixed welding to be welded, welding welding and softening hot melt adhesive, fixed welding to be welded etc.
It can carry out simultaneously, and then welding efficiency can be promoted.
In embodiments of the present invention, hot melt adhesive fixed point is formed on the primary gate electrode surface of solar battery sheet；Cooling institute
The hot melt adhesive of hot melt adhesive fixed point is stated as not plastic state；It will be provided with the solar battery sheet of not plastic state hot melt adhesive, moved to heating
The series welding board of state, so as to the hot melt gum softening and plastic state be presented；By the hot melt adhesive of plastic state, welding is fixed on described
The primary gate electrode surface of solar battery sheet；By the string welding machine, the primary gate electrode of the solar battery sheet will be fixed on
The welding on surface is welded on the primary gate electrode surface of the solar battery sheet.It is moving to series welding board, in primary gate electrode
Surface forms the hot melt adhesive fixed point of not plastic state, and the hot melt adhesive fixed point surface of plastic state is not smooth and do not have viscosity, is convenient for the sun
Packaging, the transport etc. of energy cell piece；When needing to weld, the string welding machine based on heated condition softens the hot melt adhesive, makes hot melt adhesive
Plastic state is presented, welding is bonded in the primary gate electrode surface of solar battery sheet by the hot melt adhesive of plastic state, is transmitted in welding
During welding post, welding will not or be not likely to produce displacement, convenient for precisely welding welding；Moreover, existing heated condition
String welding machine can soften the hot melt adhesive, so that plastic state is presented in hot melt adhesive, without carrying out additional transformation, welding cost to string welding machine
It is low；On the other hand, above-mentioned hot melt adhesive fixed point is just formed before moving to series welding board, not in series welding machine upper sealing glue, nothing
Sizing setting etc. need to be added in existing string welding machine, while without extra occupancy string welding machine, can promote the use of string welding machine
Efficiency, and promote welding efficiency.
Embodiment two
Referring to Fig. 2, Fig. 2 shows a kind of flow chart of welding method of the embodiment of the present invention two, can specifically include as
Lower step:
Step 201, heating hot melt adhesive is to the first preset temperature threshold, to reach default viscosity threshold.
In embodiments of the present invention, hot melt adhesive can be heated to the first preset temperature threshold, so that the hot melt adhesive reaches
Preset viscosity threshold.First preset temperature threshold, preset viscosity threshold can be set according to actual needs,
In the embodiment of the present invention, this is not especially limited.
For example, first preset temperature threshold can be 90-150 DEG C, it can hot melt adhesive is heated to 90-150 DEG C, is made
The viscosity for obtaining hot melt adhesive is 500-3000mPas (mPas, milli Pascal 〃 seconds).
In embodiments of the present invention, size applicator can have heating efficiency, can be added hot melt adhesive by size applicator
Heat is to the first preset temperature threshold.The size applicator can be point glue equipment, glue-spraying device, screen process press etc., in the present invention
In embodiment, this is not especially limited.
In embodiments of the present invention, heating hot melt adhesive is to the first preset temperature threshold, to reach default viscosity threshold, after being
Continue and be ready in the primary gate electrode surface of solar battery sheet formation hot melt adhesive fixed point, is conducive in solar battery sheet
Primary gate electrode surface forms the suitable hot melt adhesive fixed point of viscosity.
In embodiments of the present invention, optionally, the hot melt adhesive include: the binder of the first default deal, it is second default
The wax and third of deal preset the solvent of deal.The deal can be deal by mass.In embodiments of the present invention, to this
It is not especially limited.
Specifically, the composition of the hot melt adhesive is by mass, it may include binder, second default part of the first default deal
The wax and third of amount preset the solvent of deal, which can mainly play thickening power, and it is cementing that wax can play lubrication, dispersion
The effect of agent, meanwhile, wax also acts as the effect of softening or the above-mentioned bonding agent of solidification.The first default deal can be 1-20 parts,
The second default deal can be 1-10 parts or 2-20 parts, and it can be 60-90 parts which, which presets deal,.That is, according to quality
Meter, which may include: 1-20 parts of bonding agent, 1-10 parts or 2-20 parts of wax, 60-90 parts of solvent.
In embodiments of the present invention, above-mentioned hot melt adhesive includes: the wax of the binder of the first default deal, the second default deal
The solvent of deal is preset with third, the hot melt adhesive softening point is lower, and the string welding machine of existing heated condition can soften the hot melt
Glue so that plastic state is presented in the hot melt adhesive, without being transformed to string welding machine, and the hot melt adhesive of mentioned component, adhesive property preferably,
It is at low cost.
In embodiments of the present invention, optionally, the binder includes: polyvinyl butyral, ethyl cellulose, hydroxyl second
At least one of base cellulose, acetylbutyrylcellulose, aldehyde ketone resin or hydrogenated rosin pentaerythritol ester.That is, above-mentioned bonding
Agent can be polyvinyl butyral, ethyl cellulose, hydroxyethyl cellulose, acetylbutyrylcellulose, aldehyde ketone resin or hydrogenation
Any one in pentalyn, or any a variety of combination.If bonding agent is any multiple combinations, corresponding
Proportion can be set according to the actual situation, in embodiments of the present invention, be not especially limited to this.
In embodiments of the present invention, the bonding agent of mentioned component, adhesive property is good, and at low cost.
In embodiments of the present invention, optionally, the bonding agent be polyvinyl butyral, acetylbutyrylcellulose and
In the case where hydrogenated rosin pentaerythritol ester, the deal of the polyvinyl butyral is greater than part of the acetylbutyrylcellulose
Amount, and the deal of the polyvinyl butyral is greater than the deal of the hydrogenated rosin pentaerythritol ester.
Specifically, polyvinyl butyral, as bonding agent, thickening properties, adhesive property etc. preferably, therefore, are being bonded
It, can be by polyvinyl alcohol in the case that agent is polyvinyl butyral, acetylbutyrylcellulose and hydrogenated rosin pentaerythritol ester
The deal of butyral is arranged relatively large.The deal equally can be according to quality meter.
For example, in the feelings that bonding agent is polyvinyl butyral, acetylbutyrylcellulose and hydrogenated rosin pentaerythritol ester
Under condition, which may include the polyvinyl butyral of 60 deals, the acetylbutyrylcellulose of 20 deals and 20 deals
Hydrogenated rosin pentaerythritol ester, alternatively, the bonding agent may include the acetic acid of the polyvinyl butyral of 80 deals, 1-10 deal
Cellulose butyrate and the hydrogenated rosin pentaerythritol ester of 1-10 deal etc..
In embodiments of the present invention, the component of bonding agent is different, and the proportion of each component can carry out according to actual needs
Setting.For example, in the case where bonding agent is polyvinyl butyral, ethyl cellulose, due to as bonding agent, polyvinyl alcohol
Butyral, the thickening power of ethyl cellulose, bonding effect etc. quite, therefore are polyvinyl butyral, ethyl in bonding agent
In the case where cellulose, the proportion of polyvinyl butyral and ethyl cellulose can be arbitrarily arranged, for example, the two can divide equally
Proportion, if the bonding agent may include the polyvinyl butyral of 50 deals, the ethyl cellulose of 50 deals.
For another example in the case where bonding agent is acetylbutyrylcellulose, aldehyde ketone resin and hydrogenated rosin pentaerythritol ester,
The proportion of acetylbutyrylcellulose, aldehyde ketone resin and hydrogenated rosin pentaerythritol ester can divide equally, alternatively, due to acetate butyrate fibre
Thickening properties and the adhesive property for tieing up element are preferable, can be by the somewhat higher of the proportion adjustment of acetylbutyrylcellulose.Such as, the bonding
Agent may include: the hydrogenated rosin pentaerythrite of the acetylbutyrylcellulose of 50 deals, the aldehyde ketone resin of 25 deals and 25 deals
Ester.
In embodiments of the present invention, optionally, the wax include: in beeswax, Brazil wax, microwax or paraffin extremely
Few one kind.That is, the wax in above-mentioned hot melt adhesive can be any one in beeswax, Brazil wax, microwax or paraffin, Huo Zheren
It anticipates several combinations.In embodiments of the present invention, the wax of mentioned component is conducive to control softening point and softens the time, and cost
It is low.
In embodiments of the present invention, optionally, in the case where wax is microwax and paraffin, the deal of paraffin is greater than crystallite
The deal of wax.Specifically, due in both microwax and paraffin, melting point of paraffin wax is more low, and then can be by the deal of paraffin
What is be arranged is more more so that the hot melt adhesive on the series welding board of heated condition can fast softening, present plastic state.
For example, the deal of paraffin can be 3-5 times of microwax in the case where wax is microwax and paraffin.
For another example in the case where wax is paraffin and Brazil wax, the quality deal of paraffin and Brazil wax can be with
Identical or paraffin deal can be 2-5 times of Brazil wax.
In embodiments of the present invention, the fusing point of above-mentioned wax can be lower than the temperature of the series welding board of heated condition, Jin Erjia
The series welding board of Warm status can make hot melt adhesive that plastic state be presented with the fast softening hot melt adhesive.For example, if the string welding machine of heated condition
The temperature of platform is 68 DEG C, and the fusing point of above-mentioned wax can be 30-65 DEG C.
In embodiments of the present invention, optionally, the solvent includes: ethylene glycol monobutyl ether, butyl, diethyl two
At least one of alcohol monobutyl ether acetate or acetone.Specifically, solvent can be ethylene glycol monobutyl ether, butyl, two
Any one in 2-Butoxyethyl acetate or acetone or any combination.The solvent of mentioned component is conducive to control softening point
With the softening time, and it is at low cost.
In embodiments of the present invention, solvent is if above-mentioned any combination, then its corresponding proportion can be according to the actual situation
It is set, in embodiments of the present invention, this is not especially limited.For example, being ethylene glycol monobutyl ether, diethylene glycol in solvent
In the case where butyl ether, the quality deal of ethylene glycol monobutyl ether can be greater than the deal of butyl, can preferably dissolve
Above-mentioned bonding agent etc..
For another example in the case where solvent is butyl, butyl acetate, due to diethylene glycol fourth
Ether, the gaps such as solubility property of butyl acetate are smaller, the matter of butyl, butyl acetate
Amount deal can arbitrarily be set.In embodiments of the present invention, this is not especially limited.
In embodiments of the present invention, optionally, above-mentioned hot melt adhesive can also include some functional additives.The functionality
Additive may include: dispersing agent, thixotropic agent, plasticizer, stabilizer, viscosity modifier, defoaming agent, pigment, ultraviolet radiation absorption
Agent, antioxidant, coupling agent etc..Wherein, dispersing agent can be used for improving the dispersion performance of solid part in a solvent in hot melt adhesive,
Keep performance uniform, improves mobility etc..Resist sagging performance can be improved in thixotropic agent, and the hot melt adhesive after improving printing or dispensing is fixed
The moulding etc. of point.Plasticizer can make hot melt adhesive have better plasticity, convenient for construction, improve craftsmanship etc..Stabilizer can be with
The effects of reducing hot melt adhesive surface tension, preventing light, thermal decomposition or oxygenolysis etc..Viscosity modifier can be conveniently adjusted hot melt
The viscosity etc. of glue.Defoaming agent can eliminate the bubble in hot melt adhesive, improve compactness and reliability etc..Pigment can make hot melt adhesive
With specific color, convenient for subsequent identification and inspection etc..Hot melt adhesive anti-uv-ray can be improved in ultraviolet absorbing agent
With stability etc..The heat during hot melt adhesive is processed and stored to the stability of light, non-discolouring, raising can be improved in antioxidant
Stability.Bonding force and weatherability of hot melt adhesive etc. can be improved in coupling agent.
In embodiments of the present invention, optionally, it can wait according to actual needs, the selective increase in above-mentioned hot melt adhesive
Above-mentioned functional additive.Above-mentioned additive can be used alone or use as a mixture.Above-mentioned additive is in hot melt adhesive
In weight percent or mass percent can be the 4th default deal, e.g., the 4th default deal can be 0.1~5%.
In embodiments of the present invention, to this insufficient specific restriction.
For example, can add weight percent in hot melt adhesive is in order to promote the bonding force of hot melt adhesive and weatherability etc.
The coupling agent of 0.2-0.3%.Such as, which may include: 1-20 parts of bonding agent, 1-10 parts of wax, 60-90 parts molten
Agent, 0.2-0.3 parts of coupling agent.Step 202, hot melt adhesive fixed point is formed on the primary gate electrode surface of solar battery sheet.
In embodiments of the present invention, step 202 is referred to above-mentioned steps 101, it should be noted that described in solar energy
The primary gate electrode surface of cell piece forms hot melt adhesive fixed point, comprising: any one in following steps: in solar battery sheet
Primary gate electrode surface, dispensing formed hot melt adhesive fixed point；On the primary gate electrode surface of solar battery sheet, injection forms hot melt
Glue fixed point；On the primary gate electrode surface of solar battery sheet, silk-screen printing forms hot melt adhesive fixed point.
Specifically, can be by point glue equipment, on the primary gate electrode surface of solar battery sheet, it is solid that dispensing forms hot melt adhesive
Fixed point；Alternatively, can be by glue-spraying device, on the primary gate electrode surface of solar battery sheet, injection forms hot melt adhesive fixed point；
Alternatively, can be by screen process press on the primary gate electrode surface of solar battery sheet, silk-screen printing forms hot melt adhesive fixed point.
In embodiments of the present invention, this is not especially limited.
In embodiments of the present invention, on the primary gate electrode surface of solar battery sheet, dispensing forms hot melt adhesive fixed point；Or
Person, on the primary gate electrode surface of solar battery sheet, injection forms hot melt adhesive fixed point；Alternatively, in the master of solar battery sheet
Surface gate electrode, silk-screen printing form hot melt adhesive fixed point, are capable of forming the more regular uniform hot melt adhesive of shape, size and fix
Point is easy manipulation, and the consistency of hot melt adhesive fixed point is preferable, and cost is relatively low, high production efficiency；It is formed by the above method
The high consistency of each hot melt adhesive fixed point is preferable, so that the high consistency of the welding after fixed is also preferable, and then is convenient for
Welding.
In embodiments of the present invention, optionally, the primary gate electrode surface in solar battery sheet, silk-screen printing are formed
Before hot melt adhesive fixed point, further includes: make the corresponding printing screen of the hot melt adhesive fixed point；Referring to shown in Fig. 3, Fig. 3 shows
A kind of primary gate electrode surface in solar battery sheet of the embodiment of the present invention two is gone out, silk-screen printing forms hot melt adhesive fixed point
Flow chart, the primary gate electrode surface in solar battery sheet, silk-screen printing formed hot melt adhesive fixed point, may include:
Step S11 sets the primary gate electrode surface of the solar battery sheet in the printing face of the printing screen；Step S12 is squeezed
Pressing element has the hot melt adhesive of mobility, makes the hot melt adhesive with mobility through the printing screen, in the solar-electricity
The primary gate electrode surface of pond piece, printing form hot melt adhesive fixed point.
Specifically, then being needed if silk-screen printing forms hot melt adhesive fixed point on the primary gate electrode surface of solar battery sheet
Make the corresponding printing screen of hot melt adhesive fixed point.For example, can be according to the size of hot melt adhesive fixed point, shape, quantity, position
Distribution etc. is set, corresponding printing screen is made.In embodiments of the present invention, this is not especially limited.
Can after making corresponding printing screen according to the size of hot melt adhesive fixed point, shape, quantity, position distribution etc.
The printing face of the printing screen is set as with the primary gate electrode surface by solar battery sheet, for example, if the print of the printing screen
The underface that position is the printing screen is brushed, then the position on the primary gate electrode surface of solar battery sheet can be arranged at this
The underface of printing screen, and then set the primary gate electrode surface of solar battery sheet in the printing face of the printing screen.So
The hot melt adhesive with mobility is squeezed afterwards, makes have the hot melt adhesive of mobility through the printing screen, in solar battery sheet
Primary gate electrode surface, printing form hot melt adhesive fixed point.Since the printing screen is size, the shape according to hot melt adhesive fixed point
The production such as shape, quantity, position distribution, and then the hot melt adhesive fixed point that silk-screen printing is formed, it is easy manipulation, and the hot melt formed
It is good that glue fixes the consistency such as dot shape, size.
In embodiments of the present invention, optionally, which can be set heating unit, to silk screen and can scrape
The components such as plate are heated, for example, the components such as silk screen, that is, scraper plate can be heated to 70-80 DEG C, so that hot melt adhesive is presented
Preferable mobility, the hot melt adhesive by squeezing the mobility pass through above-mentioned printing screen, can be quickly in solar battery sheet
Primary gate electrode surface, printing form hot melt adhesive fixed point.
In embodiments of the present invention, optionally, string welding machine can have sizing structure, can also pass through the sizing of string welding machine
Structure forms hot melt adhesive fixed point on the primary gate electrode surface of solar battery sheet.In embodiments of the present invention, this is not made
It is specific to limit.
Step 203, the hot melt adhesive of the cooling hot melt adhesive fixed point is not plastic state.
Step 204, it will be provided with the solar battery sheet of not plastic state hot melt adhesive, moved to the series welding board of heated condition,
So as to the hot melt gum softening and plastic state be presented.
Step 205, by the hot melt adhesive of plastic state, welding is fixed on to the primary gate electrode surface of the solar battery sheet.
Step 206, by the string welding machine, it will be fixed on the welding on the primary gate electrode surface of the solar battery sheet,
It is welded on the primary gate electrode surface of the solar battery sheet.
In embodiments of the present invention, above-mentioned steps 203 to step 206 is referred to above-mentioned steps 102 to step 105, is
Avoid repeating that details are not described herein again.It should be noted that if above-mentioned primary gate electrode is the solid and spaced main grid of hollow out
Electrode optionally can weld above-mentioned welding on solid primary gate electrode surface, the main grid of hollow out is destroyed to avoid welding process
Electrode surface.
In embodiments of the present invention, optionally, during welding welding, welding temperature can be 180-250 DEG C, when welding
Between can be 1.2-1.8s, welded within this temperature range, welding welding performance is preferable, weld interval be 1.2-
1.8s, welding performance are preferable.In embodiments of the present invention, this is not especially limited.
In embodiments of the present invention, hot melt adhesive fixed point is formed on the primary gate electrode surface of solar battery sheet；Cooling institute
The hot melt adhesive of hot melt adhesive fixed point is stated as not plastic state；It will be provided with the solar battery sheet of not plastic state hot melt adhesive, moved to heating
The series welding board of state, so as to the hot melt gum softening and plastic state be presented；By the hot melt adhesive of plastic state, welding is fixed on described
The primary gate electrode surface of solar battery sheet；By the string welding machine, the primary gate electrode of the solar battery sheet will be fixed on
The welding on surface is welded on the primary gate electrode surface of the solar battery sheet.It is moving to series welding board, in primary gate electrode
Surface forms the hot melt adhesive fixed point of not plastic state, and the hot melt adhesive fixed point surface of plastic state is not smooth and do not have viscosity, is convenient for the sun
Packaging, the transport etc. of energy cell piece；When needing to weld, the string welding machine based on heated condition softens the hot melt adhesive, makes hot melt adhesive
Plastic state is presented, welding is bonded in the primary gate electrode surface of solar battery sheet by the hot melt adhesive of plastic state, is transmitted in welding
During welding post, welding will not or be not likely to produce displacement, convenient for precisely welding welding；Moreover, existing heated condition
String welding machine can soften the hot melt adhesive, so that plastic state is presented in hot melt adhesive, without carrying out additional transformation, welding cost to string welding machine
It is low；On the other hand, above-mentioned hot melt adhesive fixed point is just formed before moving to series welding board, not in series welding machine upper sealing glue, nothing
Sizing setting etc. need to be added in existing string welding machine, while without extra occupancy string welding machine, can promote the use of string welding machine
Efficiency, and promote welding efficiency.
It should be noted that for simple description, therefore, it is stated as a series of action groups for embodiment of the method
It closes, but those skilled in the art should understand that, the embodiment of the present application is not limited by the described action sequence, because according to
According to the embodiment of the present application, some steps may be performed in other sequences or simultaneously.Secondly, those skilled in the art also should
Know, the embodiments described in the specification are all preferred embodiments, and related movement might not all be the application reality
It applies necessary to example.
Embodiment three
The embodiment of the present invention also discloses a kind of hot melt adhesive, which may include: the bonding of the first default deal
Agent, the wax of the second default deal and third preset the solvent of deal.
Specifically, the composition of the hot melt adhesive is by mass, it may include binder, second default part of the first default deal
The wax and third of amount preset the solvent of deal, which can mainly play thickening power, and it is cementing that wax can play lubrication, dispersion
The effect of agent, meanwhile, wax also acts as the effect of softening or the above-mentioned bonding agent of solidification.The first default deal can be 1-20 parts,
The second default deal can be 1-10 parts or 2-20 parts, and it can be 60-90 parts which, which presets deal,.That is, according to quality
Meter, which may include: 1-20 parts of bonding agent, 1-10 parts or 2-20 parts of wax, 60-90 parts of solvent.
In embodiments of the present invention, about the specific descriptions of the hot melt adhesive, above-described embodiment one and embodiment are referred to
Two related record, in order to avoid repeating, details are not described herein again.
In embodiments of the present invention, above-mentioned hot melt adhesive includes: the wax of the binder of the first default deal, the second default deal
The solvent of deal is preset with third, and then the hot melt adhesive softening point is lower, the string welding machine of existing heated condition can soften this
Hot melt adhesive, so that plastic state is presented in the hot melt adhesive, without being transformed to string welding machine, and the hot melt adhesive of mentioned component, adhesive property
Preferably, at low cost.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in a storage medium
In (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal (can be mobile phone, computer, service
Device, air conditioner or network equipment etc.) execute method described in each embodiment of the present invention.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (17)
1. a kind of welding method, which is characterized in that the described method includes:
Hot melt adhesive fixed point is formed on the primary gate electrode surface of solar battery sheet；
The hot melt adhesive of the cooling hot melt adhesive fixed point is not plastic state；
It will be provided with the solar battery sheet of not plastic state hot melt adhesive, moved to the series welding board of heated condition, so that the hot melt
Simultaneously plastic state is presented in gum softening；
By the hot melt adhesive of plastic state, welding is fixed on to the primary gate electrode surface of the solar battery sheet；
By the string welding machine, the welding on the primary gate electrode surface of the solar battery sheet will be fixed on, be welded on it is described too
The primary gate electrode surface of positive energy cell piece.
2. the method according to claim 1, wherein the primary gate electrode surface in solar battery sheet is formed
Hot melt adhesive fixed point, comprising: any one in following steps:
On the primary gate electrode surface of solar battery sheet, dispensing forms hot melt adhesive fixed point；
On the primary gate electrode surface of solar battery sheet, injection forms hot melt adhesive fixed point；
On the primary gate electrode surface of solar battery sheet, silk-screen printing forms hot melt adhesive fixed point.
3. according to the method described in claim 2, it is characterized in that, the primary gate electrode surface in solar battery sheet, silk
Before wire mark scopiform is at hot melt adhesive fixed point, further includes:
Make the corresponding printing screen of the hot melt adhesive fixed point；
The primary gate electrode surface in solar battery sheet, silk-screen printing form hot melt adhesive fixed point, comprising:
Set the primary gate electrode surface of the solar battery sheet in the printing face of the printing screen；Squeezing has mobility
Hot melt adhesive, make the hot melt adhesive with mobility through the printing screen, in the main grid electricity of the solar battery sheet
Pole surface, printing form hot melt adhesive fixed point.
4. the method according to claim 1, wherein the primary gate electrode surface in solar battery sheet is formed
Before hot melt adhesive fixed point, further includes:
Hot melt adhesive is heated to the first preset temperature threshold, to reach default viscosity threshold.
5. the method according to claim 1, wherein the quantity of the hot melt adhesive fixed point is less than or equal to present count
Amount.
6. the method according to claim 1, wherein on the direction vertical with the cloth set direction of main gate line, institute
The size for stating hot melt adhesive fixed point is less than or equal to the first pre-set dimension.
7. the method according to claim 1, wherein the hot melt adhesive include: the first default deal binder,
The wax and third of second default deal preset the solvent of deal.
8. the method according to the description of claim 7 is characterized in that the binder includes: polyvinyl butyral, ethyl fibre
Tie up at least one of element, hydroxyethyl cellulose, acetylbutyrylcellulose, aldehyde ketone resin or hydrogenated rosin pentaerythritol ester.
9. according to the method described in claim 8, it is characterized in that, being polyvinyl butyral, acetic acid fourth in the bonding agent
In the case where acid cellulose and hydrogenated rosin pentaerythritol ester, the deal of the polyvinyl butyral is greater than the acetate butyrate
The deal of cellulose, and the deal of the polyvinyl butyral is greater than the deal of the hydrogenated rosin pentaerythritol ester.
10. the method according to the description of claim 7 is characterized in that the wax include: beeswax, Brazil wax, microwax or
At least one of paraffin.
11. according to the method described in claim 10, it is characterized in that, the wax be microwax and paraffin in the case where, institute
The deal for stating paraffin is greater than the deal of the microwax.
12. the method according to the description of claim 7 is characterized in that the solvent includes: ethylene glycol monobutyl ether, diethylene glycol
At least one of butyl ether, butyl acetate or acetone.
13. the method according to claim 1, wherein the softening point temperature of the hot melt adhesive is default lower than second
Temperature threshold.
14. the method according to claim 1, wherein the softening time of the hot melt adhesive is less than preset time threshold
Value.
15. the method according to claim 1, wherein the welding, comprising: round welding, triangle welding,
At least one of shape welding band.
16. the method according to claim 1, wherein the primary gate electrode includes: solid primary gate electrode, reality
One of the heart and the spaced primary gate electrode of hollow out.
17. a kind of hot melt adhesive characterized by comprising the wax and third of the binder of the first default deal, the second default deal
The solvent of default deal.
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