CN208271911U - A kind of welder preparing solar battery - Google Patents
A kind of welder preparing solar battery Download PDFInfo
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- CN208271911U CN208271911U CN201820846048.8U CN201820846048U CN208271911U CN 208271911 U CN208271911 U CN 208271911U CN 201820846048 U CN201820846048 U CN 201820846048U CN 208271911 U CN208271911 U CN 208271911U
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- 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
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Abstract
A kind of welder preparing solar battery.The welder includes heating bottom plate and heater, the heater is arranged above the heating bottom plate, wherein the heating bottom plate or the heater are configured to carry out staged temperature control, alternatively, the heating bottom plate and the heater are configured to carry out staged temperature control.The welder, which can be realized, at a lower temperature welds solar battery, and more precise control welding temperature, is evenly heated, and is effectively improved welding pulling force, provides reliable welding, and do not damage battery chip.
Description
Technical field
The utility model relates to but be not limited to area of solar cell, and in particular, to but be not limited to a kind of prepare the sun
The welder of energy battery.
Background technique
With the fast development of solar battery technology, the demand that people use solar battery product is more and more,
And no longer content just to the power generation needs of solar battery, be convenient for carrying with greater need for its satisfaction, it is foldable or can with it is existing
The performance that product directly merges, flexible solar battery pack come into being.
Crystal silicon solar energy battery includes monocrystaline silicon solar cell, polysilicon solar cell and heterojunction solar electricity
Pond (such as Heterojunctionwith Intrinsic Thinlayer (HIT), intrinsic film heterojunction solar battery)
Deng, HIT battery due to its low temperature preparation, processing step is simple and temperature coefficient is good the advantages that, be expected to become photovoltaic industry master
One of Flow Technique.
After the completion of each film layer preparation of solar battery, it is also necessary to carry out the preparation of subsequent components, subsequent components preparation includes
The processes such as grid line preparation, the preparation of electric current extraction wire, battery chip interconnection, component lamination.The sintering of conventional crystalline silion cell and
Welding technique is high-temperature technology, and welding temperature is usually more than 300 DEG C.
The electric current extraction wire of conventional crystalline silion cell, which mostly uses, applies tin copper strips, using Copper base material as conductive bodies, surface
Coating is generally leypewter, tin-lead ratio about 60:30.Use and apply tin copper strips as electric current extraction wire, is welded to grid
Welding temperature when line electrode is at 300 DEG C or so.It, can be by infrared lamp heat radiation, so that applying when welding current extraction wire
The tin-lead of tin copper strip surface melts, so that the silver paste main gate line of conducting wire and crystal silicon cell be bonded, forms conductive path.It is conventional
The temperature of welder heating bottom plate of crystal silicon cell fix, it is general using welding fluorescent tube as the heating source welded, make
It applies tin copper strips conductive line surfaces to melt, to complete the welding of painting tin copper strips conducting wire and main gate line.The characteristics of welding fluorescent tube is heating
Quickly, the disadvantage is that temperature control precision is poor.It is insensitive to temperature fluctuation but due to crystal silicon cell high temperature resistant, therefore, use
The welder of conventional crystal silicon cell carries out the welding of crystal silicon cell, and battery chip performance is not easy to be affected by temperature.
Utility model content
It is the general introduction to the theme being described in detail herein below.This general introduction is not the protection model in order to limit claim
It encloses.
The utility model inventors have found that since hetero-junction solar cell (such as: HIT battery) is (general using low temperature process
Lower than 200 DEG C) production, different from conventional crystalline silion cell, electrode metallization is using low temperature silver paste.And in low-temperature setting
In conductive silver paste, the poor heat resistance of matrix resin is unable to sintering processes, and welding temperature once reaches 200 DEG C, and low temperature silver paste is just very
It is easy to be detached from indium tin oxide films surface.
Therefore, if HIT battery use tradition apply tin copper strips as conducting wire, using the high-temperature soldering side of conventional crystalline silion cell
Method is welded, it will is damaged to the material of each film layer of HIT battery, is influenced the parameter and photoelectric conversion efficiency of battery, very
Battery chip can be extremely damaged, battery fragment rate is increased；And it is difficult to search out suitable welding condition, is easy to appear rosin joint
Or it crosses and welds.
HIT battery uses conventional soldering techniques, mainly there is two large problems: 1) tin copper strips conducting wire and battery chip are applied after welding
Pulling force between main gate line is too low, not can guarantee the reliability of welding；2) prepared component is carrying out reliability test,
Especially thermal cycling test when, weld interface dropping situations are serious, cause component power decaying it is excessive.
The utility model additionally provides a kind of welder for being used to prepare solar battery.The welder includes heating
Bottom plate and heater, heater setting is above heating bottom plate, wherein heating bottom plate or heater are configured to carry out ladder
Formula temperature control, alternatively, heating bottom plate and heater are configured to carry out staged temperature control.
Stepped temperature control, can more precise control welding temperature, be evenly heated, avoid excessively high welding temperature to battery
While performance adversely affects, the reliability of welding ensure that.
In some embodiments, heating bottom plate or heater may include a plurality of heating zones, alternatively, heating bottom plate and
Heater may include a plurality of heating zones.
In some embodiments, heat bottom plate heating zone can set gradually for preheating zone, heating zone, welding section,
Cooling area and holding area, so that the heating bottom plate is able to carry out staged temperature control.
In some embodiments, the heating zone of heater can set gradually as heating zone, welding section and cooling area,
So that the heater is able to carry out staged temperature control, heating zone, welding section and the cooling area of heater can be with heating bottoms
Heating zone, welding section and the cooling area upper and lower position of plate correspond.
In some embodiments, the heating zone of heater can set gradually as preheating zone, heating zone, welding section, drop
Warm area and holding area, so that heater is able to carry out staged temperature control, the preheating zone of heater, heating zone, welding section, cooling
Area and holding area can be with preheating zone, heating zone, welding section, cooling area and the holding area upper and lower positions of heating bottom plate one by one
It is corresponding.
In some embodiments, heat bottom plate heating zone can be set to it is a plurality of, each heating zone be set as temperature
Degree can be independently controlled；The cooling area of heating bottom plate can be set to a plurality of, and each cooling area is set as temperature can be by
Individually control.
In some embodiments, the heating zone of heater can be set to a plurality of, and each heating zone is set as temperature
It can be independently controlled；The cooling area of heater can be set to a plurality of, and each cooling area is set as temperature can be independent
Control.
In some embodiments, a plurality of heating zones are respectively provided with heating element and temperature controller, temperature controller
Control heating element is configured to adjust the temperature of heating zone.
In some embodiments, heating element can for example use resistance heating wire, and different heating zones can use
Different resistance heating wires, controls temperature individually；Same root resistive heater can also be used, but different
The density degree of the resistive heater of heating zone is arranged different.
In some embodiments, heater can be storage heater.
In some embodiments, storage heater may include a plurality of Hot-blast Heating chambers separated, Hot-blast Heating
Chamber forms a plurality of heating zones.For example, a plurality of Hot-blast Heating chambers can be respectively formed the heating zone of storage heater, welding section
And cooling area, or form preheating zone, heating zone, welding section, cooling area and the holding area of storage heater.
Storage heater temperature control precision is high, and heating more evenly, has advanced optimized welding procedure, more effectively improves
Pulling force is welded, guarantees soldering reliability.
In some embodiments, the temperature range for heating preheating zone to the welding section of bottom plate can be 50 DEG C~120 DEG C,
The temperature range for heating welding section to the cooling area of bottom plate can be 120 DEG C~50 DEG C.
In some embodiments, the preheating zone temperature for heating bottom plate can be 50 DEG C~60 DEG C, heat the heating of bottom plate
The temperature in area can be 60 DEG C~100 DEG C, and the temperature for heating the welding section of bottom plate can be 100 DEG C~120 DEG C, heat bottom plate
The temperature of cooling area can be 60 DEG C~100 DEG C, and the temperature for heating the holding area of bottom plate can be 50 DEG C~60 DEG C.
In some embodiments, when the heating zone of heater be followed successively by preheating zone, heating zone, welding section, cooling area with
And when holding area, the temperature range of preheating zone to the welding section of heater can be 100 DEG C~180 DEG C, the weldering of heater
The temperature range for connecing area to holding area can be 180 DEG C~100 DEG C.
In some embodiments, the preheating zone temperature of heater can be 100 DEG C~110 DEG C, the heating zone of heater
Temperature can be 110 DEG C~150 DEG C, the temperature of the welding section of heater can be 150 DEG C~180 DEG C, the cooling of heater
The temperature in area can be 110 DEG C~150 DEG C, and the temperature of the holding area of heater can be 100 DEG C~110 DEG C.
In some embodiments, when the heating zone of heater is followed successively by heating zone, welding section and cooling area, institute's heat
The temperature range of the heating zone of device to welding section can be 110 DEG C~180 DEG C, the temperature model of welding section to the cooling area of heater
Enclose to be 180 DEG C~110 DEG C.
In some embodiments, the temperature of the heating zone of heater can be 110 DEG C~150 DEG C, the welding of heater
The temperature in area can be 150 DEG C~180 DEG C, and the temperature of the cooling area of heater can be 110 DEG C~150 DEG C.
The utility model additionally provides a kind of method for preparing solar battery.The method includes using above-mentioned welding to fill
Set the welding lead on the electrode of solar battery.
In some embodiments, temperature when welding lead can be 150 DEG C~180 DEG C.
In some embodiments, the welding lead on the electrode of solar battery the step of are as follows: by battery chip and lead
Line is delivered on the preheating zone of heating bottom plate, is preheated；By after preheating battery chip and conducting wire be delivered to heating bottom plate
On heating zone, the primary or stepped heating of plural number time is carried out；Battery chip and conducting wire after will heat up are delivered to heating bottom plate
Welding section on, be warming up to welding temperature, weld together conducting wire and main gate line；It will complete the battery chip and conducting wire of welding
It is delivered on the cooling area of heating bottom plate, carries out the primary or stepped cooling of plural number time；By the battery chip after cooling and lead
Line is delivered in the holding area of heating bottom plate, is stepwise cooled down.
Battery chip, using welding section, can effectively improve welding performance after preheating and heating；After welding lead
Battery chip can effectively avoid welding fragmentation caused by welded stress using cooling area and holding area.
In some embodiments, staged heating or drop can be carried out with 10 DEG C~20 DEG C ranges of temperature arrived
Temperature.
In some embodiments, the temperature range for heating preheating zone to the welding section of bottom plate is 50 DEG C~120 DEG C, heating
The temperature range of the welding section of bottom plate to cooling area is 120 DEG C~50 DEG C.
In some embodiments, the preheating zone temperature for heating bottom plate can be 50 DEG C~60 DEG C, heat the heating of bottom plate
The temperature in area can be 60 DEG C~100 DEG C, and the temperature for heating the welding section of bottom plate can be 100 DEG C~120 DEG C, heat bottom plate
The temperature of cooling area can be 60 DEG C~100 DEG C, and the temperature for heating the holding area of bottom plate can be 50 DEG C~60 DEG C.
In some embodiments, when the heating zone of heater is followed successively by preheating zone, heating zone, welding section, cooling
When area and holding area, preheating zone to the welding section of hot device temperature range be 100 DEG C~180 DEG C, the welding section of heater
Temperature range to holding area is 180 DEG C~100 DEG C.
In some embodiments, the preheating zone temperature of heater can be 100 DEG C~110 DEG C, the heating zone of heater
Temperature can be 110 DEG C~150 DEG C, the temperature of the welding section of heater can be 150 DEG C~180 DEG C, the cooling of heater
The temperature in area can be 110 DEG C~150 DEG C, and the temperature of the holding area of heater can be 100 DEG C~110 DEG C.
In some embodiments, when the heating zone of heater is followed successively by heating zone, welding section and cooling area,
Hot device heating zone to welding section temperature range be 110 DEG C~180 DEG C, the temperature model of welding section to the cooling area of heater
Enclose is 180 DEG C~110 DEG C.
In some embodiments, the temperature of the heating zone of heater can be 110 DEG C~150 DEG C, the welding of heater
The temperature in area can be 150 DEG C~180 DEG C, and the temperature of the cooling area of heater can be 110 DEG C~150 DEG C.
In some embodiments, battery chip and conducting wire are in preheating zone, heating zone, the welding section, cooling of heating bottom plate
Area and holding area difference residence time can be 3 seconds~5 seconds.
The welding effect of conducting wire and battery chip can be effectively ensured in the above-mentioned residence time, have reliable welding pulling force,
And it prevents from excessively heating and battery performance is impacted.
Following solar battery can be prepared using welder provided by the utility model, the battery includes battery
Chip, the electrode being set on battery chip and the conducting wire being electrically connected with electrode；Conducting wire includes Copper base material and is arranged copper-based
The alloy-layer on material surface, alloy-layer are selected from the alloy material that melting temperature is not more than 180 DEG C.
In some embodiments, the alloy-layer is selected from sn-bi alloy, tin bismuth silver alloy, tin bismuth copper alloy and tin indium and closes
Any one in gold.
The alloy layer material of above-mentioned selection all has the melting temperature no more than 180 DEG C, and will not be to solar battery
Performance brings detrimental effect, selects above-mentioned alloy as the superficial layer of conducting wire, reduce the welding temperature of conducting wire, it can be achieved that
HIT battery is welded under lower temperature, low-temperature welding does not destroy the performance of battery.
In some embodiments, the mass ratio of the tin in sn-bi alloy layer and bismuth can be 42~70:58~30, example
It such as, can be 42~60:58~40；The mass ratio of tin, bismuth and silver in tin bismuth silver alloy layer can be 42~70:57~29:
1, for example, can be 42~65:57~34:1；The mass ratio of tin, bismuth and copper in tin bismuth copper alloy layer can for 42.5~
69.5:57~30:0.5, for example, can be 42.5~59.5:57~40:0.5；The mass ratio of tin and indium in tin-indium alloy layer
It can be 40~60:60~40, for example, can be 40~50:60~50, such as 48:52.
In some embodiments, the alloy-layer can choose Sn42Bi58、Sn42Bi57Ag1、Sn64Bi35Ag1、
Sn69.5Bi30Cu0.5、Sn48In52Deng.
Above-mentioned alloy material is capable of providing lower welding temperature.
In some embodiments, the alloy-layer with a thickness of 0.01mm~0.03mm.
Above-mentioned alloy layer thickness can cover the surface of Copper base material well, and be formed well with electrode in the welding process
Conductive path.It will lead to the problems such as welding region becomes larger if alloy layer thickness is greater than 0.03mm, if alloy layer thickness is less than
0.01mm is then easy to cause failure welding.
In some embodiments, solar battery is heterojunction solar battery.
In some embodiments, solar battery is intrinsic film heterojunction solar battery.
The prior art is compared, and the utility model has advantageous effect in that:
1, the welding lead surface alloying layer melting temperature selected is low, may be implemented at a lower temperature to weld battery
It connects；
2, welder uses staged temperature control, and energy more precise control welding temperature is evenly heated；
3, it is effectively improved welding pulling force, provides reliable welding, and do not damage battery chip；
4, battery reliability test meets coherent detection standard, and is tested by respective environment.
Other features and advantages of the utility model will illustrate in the following description, also, partly from specification
In become more fully apparent, or understood and implementing the utility model.The purpose of this utility model and other advantages can pass through
Specifically noted structure is achieved and obtained in the specification, claims and drawings.
Detailed description of the invention
Attached drawing is used to provide to further understand technical solutions of the utility model, and constitutes part of specification,
It is used to explain the technical solution of the utility model together with the embodiments of the present invention, not constitute to the utility model technology
The limitation of scheme.
Fig. 1 is the schematic diagram of the welder of the utility model embodiment；
Fig. 2 is the schematic diagram of another angle of welder of the utility model embodiment；
Fig. 3 is the staged temperature control schematic diagram of the heating bottom plate of the welder of the utility model embodiment；
Fig. 4 is the schematic diagram of the welder of another embodiment of the utility model.
In figure: 1. infrared heating fluorescent tubes；2. pushing probe row；3. battery chip；4. heating bottom plate；5. Hot-blast Heating chamber.
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, below in conjunction with attached drawing to this
The embodiment of utility model is described in detail.It should be noted that in the absence of conflict, the implementation in the utility model
Feature in example and embodiment can mutual any combination.
Welder provided by the embodiment of the utility model, as depicted in figs. 1 and 2, welder include heater, heating
Bottom plate pushes the components such as probe row, conveyer belt (not shown), vacuum absorption device (not shown).Heater is for example
Infrared heating fluorescent tube 1 can be used, the heating source as welding；Heating bottom plate 4 is able to carry out staged temperature control；Conveyer belt is set to
It heats on bottom plate 4, vacuum absorption device is set under heating bottom plate 4, such as vacuum pipe can be used, and is heated and is arranged on bottom plate 4
Have aperture, convenient for vacuum absorption device on conveyer belt battery chip 3 and conducting wire fix, keep conveyer belt, battery chip 3,
Conducting wire relative position is constant；Battery chip 3 is placed on heating bottom plate 4, and conducting wire is routed in advance on battery chip 3, battery
Piece 3 successively reaches welding section by the preheating zone of heating bottom plate 4, heating zone by conveyer belt, and welding section is located at infrared heat lamp
1 lower section of pipe pushes probe at this time and arranges 2 downward actuations, makes the main grid of the copper strips conducting wire for being coated with the alloy-layers such as tin bismuth and battery chip 3
Line fitting, infrared heating fluorescent tube 1 heat, and make the alloy melting layer of conductive line surfaces, thus by the welding of conducting wire and main gate line；Welding
Battery chip 3 after conducting wire completes entire welding again by conveyer belt successively by the cooling area of heating bottom plate 4, holding area
Process.
The heating bottom plate 4 of welder is able to carry out staged temperature control, and heating bottom plate 4 has a plurality of heating zones, heating
Area is respectively provided with heating element (such as: resistance heating wire) and temperature controller (not shown), temperature controller are configured to
Heating element can be controlled to adjust the temperature of heating zone, to realize the staged temperature control of heating bottom plate 4.Different heating zones can
To use different resistance heating wires, same root resistance heating wire can also be used, but the resistance in different heating zones adds
The density degree of heated filament is arranged different.The temperature of each heating zone of bottom plate 4 is heated for example as shown in figure 3, two heatings can be set
Area and two cooling areas, wherein preheating zone temperature can be 50 DEG C~60 DEG C, and the temperature in an area of heating up can be 60 DEG C~80 DEG C,
The temperature in 2nd area of heating up can be for 80 DEG C~100 DEG C, and the temperature of welding section can be 100 DEG C~120 DEG C, the temperature in the area that cools down
It can be 80 DEG C~100 DEG C, the temperature in 2nd area that cool down can be 60 DEG C~80 DEG C, and the temperature of holding area can be 50 DEG C~60
℃。
A heating zone and a cooling area or more heating zones or cooling area can also be only arranged by heating bottom plate 4.
Staged heats the temperature that can preferably control welding procedure, so that homogeneous heating, ensure that the reliable of welding
Property.Battery chip, using welding section, can effectively improve welding performance after preheating and heating；Battery after welding lead
Piece can effectively avoid welding fragmentation caused by welded stress using cooling area and holding area.
Storage heater can be used in heater in another embodiment of the utility model, and storage heater has plural number
A Hot-blast Heating chamber 5, each Hot-blast Heating chamber 5 are respectively provided with heating element (such as: resistance heating wire) and temperature controller (in figure
It is not shown), temperature controller is configured to control heating element to adjust the temperature of Hot-blast Heating chamber 5, to realize that hot wind adds
The staged temperature control of hot device, then pass through hot air circulation to reinforce the control of temperature in Hot-blast Heating chamber 5.Each Hot-blast Heating chamber 5 it
Between separated by baffle, baffle just offer on a moving belt enable battery chip 4 and conducting wire by wicket.Respectively
Hot-blast Heating chamber 5 is for forming each heating zone, wherein the temperature in an area of heating up can be 110 DEG C~130 DEG C, the temperature in 2nd area of heating up
Degree can be 130 DEG C~150 DEG C, and the temperature of welding section can be 150 DEG C~180 DEG C, and the temperature in the area that cools down can be 130 DEG C
~150 DEG C, the temperature in 2nd area of cooling is 110 DEG C~130 DEG C.
A heating zone and a cooling area can also be only arranged in storage heater, or more heating zones or drop is arranged
Warm area.Preheating zone and holding area can also be arranged in storage heater.
Storage heater temperature control precision is high, and heating more evenly, has advanced optimized welding procedure, more effectively improves
Pulling force is welded, guarantees soldering reliability.The setting of heating chamber, so that the temperature of each heating zone does not interact, temperature control essence
Du Genggao.
The welder of the utility model embodiment individually only can carry out staged temperature control to heating bottom plate, can also be single
Staged temperature control only solely is carried out to storage heater, staged control can also be carried out to heating bottom plate and storage heater simultaneously
Temperature.
When carrying out staged temperature control to heating bottom plate and storage heater simultaneously, the welding section of storage heater and heating
The upper and lower position of the welding section of bottom plate is corresponding, and the upper and lower position of heating zone and cooling area also corresponds to, if storage heater is provided with
Preheating zone and holding area, then preheating zone and the upper and lower position of holding area are equally corresponding.
The conducting wire welded in the utility model embodiment includes Copper base material and the alloys such as the tin bismuth on Copper base material surface is arranged in
Layer.The conducting wire is applicable in lower welding temperature, so that adverse effect of the battery chip from high-temperature soldering.
Embodiment 1
Using low-temperature welding method, heats bottom plate and storage heater carries out staged temperature control:
Choose HIT battery chip；
Choose surface and be coated with the copper strips of sn-bi alloy layer as conducting wire, alloy layer thickness 0.02mm, in alloy-layer tin and
The mass ratio of bismuth is 42:58, and the welding temperature of conducting wire is 160 DEG C；
It is 50 DEG C that the temperature that each heating zone of heating bottom plate of welder is arranged, which is respectively as follows: preheating zone temperature, an area of heating up
Temperature is 60 DEG C, and two area's temperature of heating are 80 DEG C, and 110 DEG C of welding section temperature, one area's temperature of cooling is 80 DEG C, and cool down two area's temperature
It is 60 DEG C, holding area temperature is 50 DEG C；
It is 80 DEG C that the temperature that each heating zone of storage heater of welder is arranged, which is respectively as follows: preheating zone temperature, heating one
Area's temperature is 100 DEG C, and two area's temperature of heating are 120 DEG C, and 160 DEG C of welding section temperature, one area's temperature of cooling is 120 DEG C, cooling two
Area's temperature is 100 DEG C, and holding area temperature is 80 DEG C；
The preheating zone for heating bottom plate is corresponding with the preheating zone of storage heater, heats one area of heating and the Hot-blast Heating of bottom plate
One area of heating of device is corresponding, and so on, the upper and lower position in subsequent each area also successively corresponds；
Battery chip passes sequentially through the preheating zone, one area of heating and heating two of heating bottom plate by conveyer belt from left to right
Area reaches welding section, pushes probe at this time and arranges downward actuation, so that conducting wire is bonded welding with the main gate line of battery chip, then again
It passes sequentially through one area of cooling, 2nd area of cooling and holding area and completes welding；Residence time of the battery chip in each area is 3 seconds.
Embodiment 2
Using low-temperature welding method, heats bottom plate and storage heater carries out staged temperature control:
Choose HIT battery chip；
It chooses surface and is coated with the copper strips of tin bismuth silver alloy layer as conducting wire, alloy layer thickness 0.03mm, tin in alloy-layer,
Bismuth, silver-colored mass ratio are 42:57:1, and the welding temperature of conducting wire is 180 DEG C；
It is 60 DEG C that the temperature that each heating zone of heating bottom plate of welder is arranged, which is respectively as follows: preheating zone temperature, heating zone temperature
Degree is 80 DEG C, and 100 DEG C of welding section temperature, cooling area temperature is 80 DEG C, and holding area temperature is 60 DEG C；
The temperature that each heating zone of storage heater of welder is arranged is respectively that heating zone temperature is 120 DEG C, welding section
180 DEG C of temperature, cooling area temperature is 120 DEG C；
The heating zone for heating bottom plate is corresponding with the heating zone of storage heater, heats welding section and the storage heater of bottom plate
Welding section it is corresponding, the cooling area for heating bottom plate is corresponding with the cooling area of storage heater；
Battery chip passes sequentially through the preheating zone of heating plate, heating zone by conveyer belt from left to right, reaches welding section, this
When push probe arrange downward actuation, so that conducting wire be bonded welding with the main gate line of battery chip, then pass sequentially through again cooling area, guarantor
It holds area and completes welding；Residence time of the battery chip in each area is 4 seconds.
Embodiment 3
Using low-temperature welding method, heats bottom plate and carries out staged temperature control:
Choose HIT battery chip；
Choose surface and be coated with the copper strips of tin-indium alloy layer as conducting wire, alloy layer thickness 0.01mm, in alloy-layer tin and
The mass ratio of indium is 48:52, and the welding temperature of conducting wire is 150 DEG C；
It is 60 DEG C that the temperature that each heating zone of heating bottom plate of welder is arranged, which is respectively as follows: preheating zone temperature, an area of heating up
Temperature is 80 DEG C, and two area's temperature of heating are 100 DEG C, and 120 DEG C of welding section temperature, one area's temperature of cooling is 100 DEG C, and cool down two area's temperature
Degree is 80 DEG C, and holding area temperature is 60 DEG C；
Using infrared heating device as heater, heating temperature is 150 DEG C；
Battery chip passes sequentially through 2nd area of preheating zone, one area of heating and heating of heating plate by conveyer belt from left to right,
Welding section is reached, probe is pushed at this time and arranges downward actuation, so that conducting wire is bonded welding with the main gate line of battery chip, then again successively
Welding is completed by one area of cooling, 2nd area of cooling and holding area；Residence time of the battery chip in each area is 5 seconds.
Comparative example 1
Using conventional soldering method:
Choose HIT battery chip；
Selection surface is coated with the copper strips of leypewter layer as conducting wire, and the welding temperature of conducting wire is 200 DEG C or more；
Heating bottom plate is non-stage temperature control, and setting temperature is 80 DEG C；
Heater is non-stage temperature control infrared heating device, and setting temperature is 220 DEG C；
Battery chip is welded by conveyer belt by infrared heating device and conducting wire.
Product test
The battery that the utility model embodiment is prepared, according to IEC 61215-2 " photovoltaic (PV) component safety identification the
2 parts: test requirements document " in damp and hot, wet jelly, thermal cycle, mechanical load experiment tested, the results are shown in Table 1.
The test result of table 1 the utility model embodiment and documents
Since external force or thermal stress act on, if the welding is not firm between conducting wire and battery chip main gate line, it is easy to appear and connects
Touch bad problem.It can be seen that the battery welded using welder described in the utility model from the test result of table 1
Piece, conducting wire and the direct pulling force of main gate line reach 1N/mm or more, and changed power is less than 3% after thermal cycle, welding effect and power
Variation meets the requirements, and reliability is protected.
Although embodiment disclosed by the utility model is as above, the content only the utility model for ease of understanding
And the embodiment used, it is not intended to limit the utility model.Technical staff in any the utility model fields,
Under the premise of not departing from spirit and scope disclosed by the utility model, it can be carried out in the form and details of implementation any
Modification and variation, but the scope of patent protection of the utility model, still should be subject to the scope of the claims as defined in the appended claims.
Claims (11)
1. a kind of welder for preparing solar battery, the welder includes heating bottom plate and heater, the heating
Device is arranged above the heating bottom plate, wherein the heating bottom plate or the heater are configured to carry out staged control
Temperature, alternatively, the heating bottom plate and the heater are configured to carry out staged temperature control.
2. welder according to claim 1, wherein the heating bottom plate or the heater include a plurality of heating
Area, alternatively, the heating bottom plate and the heater include a plurality of heating zones.
3. welder according to claim 2, wherein the heating zone of the heating bottom plate sets gradually as preheating
Area, heating zone, welding section, cooling area and holding area.
4. welder according to claim 2, wherein the heating zone of the heater sets gradually as heating
Area, welding section and cooling area, alternatively, setting gradually as preheating zone, heating zone, welding section, cooling area and holding area.
5. welder according to claim 3, wherein the heating zone of the heater sets gradually as heating
Area, welding section and cooling area, alternatively, setting gradually as preheating zone, heating zone, welding section, cooling area and holding area.
6. welder according to claim 3, wherein the heating zone of the heating bottom plate and cooling area are respectively set to
It is a plurality of.
7. welder according to claim 4 or 5, wherein the heating zone of the heater and cooling area are respectively set
It is a plurality of.
8. welder according to claim 2, wherein a plurality of heating zones are respectively provided with heating element and temperature
Controller, the temperature controller are configured to control temperature of the heating element to adjust the heating zone.
9. welder according to claim 1, wherein the heater is storage heater.
10. the welder according to any one of claim 2-6, wherein the heater is storage heater.
11. welder according to claim 10, wherein the storage heater includes a plurality of hot winds separated
Heating chamber, the Hot-blast Heating chamber form a plurality of heating zones.
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| CN201820846048.8U CN208271911U (en) | 2018-06-01 | 2018-06-01 | A kind of welder preparing solar battery |
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| CN201820846048.8U CN208271911U (en) | 2018-06-01 | 2018-06-01 | A kind of welder preparing solar battery |
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| CN208271911U true CN208271911U (en) | 2018-12-21 |
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