CN211045459U - Annealing equipment for solar cell - Google Patents
Annealing equipment for solar cell Download PDFInfo
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- CN211045459U CN211045459U CN202020025239.5U CN202020025239U CN211045459U CN 211045459 U CN211045459 U CN 211045459U CN 202020025239 U CN202020025239 U CN 202020025239U CN 211045459 U CN211045459 U CN 211045459U
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Abstract
The utility model relates to a solar cell annealing equipment, annealing equipment includes the furnace body, and the inside of furnace body is formed with holds the chamber, holds the chamber and can hold solar wafer, and the light source, the light source is connected with the furnace body, can shine in order to carry out light injection annealing to solar wafer, adopts the utility model provides an annealing equipment can solve the problem of photoinduced decay "L ID" (L light Induced Degradation), has proposed new solution for the reliability of guaranteeing the product, moreover, adopts the utility model discloses an annealing equipment can control L ID within 0.5%, possesses good economic benefits and popularization prospect.
Description
Technical Field
The utility model relates to a solar cell technical field especially relates to a solar cell annealing equipment.
Background
The photo-attenuation (L ID, &lTtTtransformation = L "&gTtL &lTt/T &gTtlight Induced Degradation) problem of the PERC cell, especially the thermally assisted photo-attenuation (539 2 eTID, &lTtTtransformation &l" &gTtL &lTt/T gTt transformation &l "&lTt/T gTt t g t illuminated Temperature Induced Degradation) is a recent crystalline silicon solar cell technology field focused industry, the inhibition of the photo-attenuation becomes more and more urgent as the PERC cell technology is scaled up, the attenuation mechanism of L eTID is different, which generally occurs when both the photo-attenuation and the high Temperature (>50 ℃) condition are satisfied and the photo-thermal attenuation of the poly-crystalline silicon solar cell technology field occurs when the hot cell technology is scaled up, the photo-thermal attenuation of the poly-crystalline silicon solar cell technology field is greater than the hot Temperature Degradation of the PERC module (L) under the experimental operating condition that the photo-thermal attenuation of the PERC module is greater than the hot Temperature of the hot cell module (L).
SUMMERY OF THE UTILITY MODEL
The utility model provides a solar cell annealing equipment to overcome prior art's defect. The specific technical scheme is as follows:
a solar cell annealing apparatus, comprising:
the solar cell heating furnace comprises a furnace body, a heating device and a heating device, wherein an accommodating cavity is formed inside the furnace body and can accommodate a solar cell;
the light source is connected with the furnace body and can irradiate the solar cell to carry out light injection annealing, and the light source is selected from one or at least two of an infrared IR lamp, an L ED lamp, a xenon lamp, a tungsten lamp and laser;
preferably, the light intensity of the light source is not lower than 10 standard suns, and the light intensity of 1 standard sun is 1000W/h.m2(ii) a And/or the spectral wavelength of the light source is in the range of 300nm to 4000 nm.
The utility model discloses a solar cell annealing device, as preferred technical scheme or another technical scheme, the furnace body is equipped with relative first opening and second opening in first direction;
the solar cell annealing apparatus further includes: a conveying device; the conveying device at least comprises a conveying belt, and the conveying belt extends along the first direction and penetrates through the first opening and the second opening to penetrate through the accommodating cavity; the conveying belt is used for bearing the solar cell pieces and can drive the solar cell pieces to move along a first direction, so that the solar cell pieces can enter the accommodating cavity from the first opening and leave the accommodating cavity from the second opening.
Solar cell annealing equipment, as preferred technical scheme or another technical scheme, still include:
the first direct current power supply is arranged outside the furnace body;
the first electrode is arranged in the furnace body and is electrically connected with the positive electrode of the first direct current power supply;
the second electrode is arranged in the furnace body and is electrically connected with the negative electrode of the first direct current power supply;
the first electrode and the second electrode are used for contacting the solar cell and performing electric injection annealing on the solar cell.
The utility model discloses a solar cell annealing equipment, as preferred technical scheme or another technical scheme, the first electrode is the metal wire that hangs, the metal wire has set length in order to contact the solar cell piece;
for explanation and illustration, the set length can be selected according to the actual situation and achieves the following objectives: so that the metal wire can contact the solar cell and can not contact the second electrode.
Preferably, the delivery device comprises the second electrode;
by way of explanation and illustration, the transfer device herein includes the second electrode, and encompasses situations where a portion of the transfer device is an electrode, or where the transfer device is also populated with electrodes.
For example, the following steps are carried out: the conveyor belt is made of conductive materials and is used as a second electrode; or a conductive material is additionally arranged on the conveyor belt, can be in contact with the solar cell and applies voltage to the solar cell in cooperation with the first electrode.
Solar cell annealing equipment, as preferred technical scheme or another technical scheme, still include:
the rotary annealing device is arranged outside the furnace body; the rotary annealing device comprises a second direct-current power supply, a rotating shaft and an electrode assembly, wherein:
the second direct current power supply is arranged outside the furnace body;
the electrode assembly comprises a third electrode and a fourth electrode, the third electrode is electrically connected with the positive electrode of the second direct current power supply, and the fourth electrode is electrically connected with the negative electrode of the second direct current power supply; the third electrode and the fourth electrode are rotatably connected through the rotating shaft, and the third electrode and the fourth electrode can relatively rotate by taking the rotating shaft as a center to clamp the battery piece;
preferably, the third electrode includes a first electrode plate and a first spring electrode, the first spring electrode is disposed on the first surface of the first electrode plate, the fourth electrode includes a second electrode plate and a second spring electrode, the second spring electrode is disposed on the first surface of the second electrode plate, and the third electrode and the fourth electrode can rotate relative to the furnace body around the rotating shaft so that the second spring electrode and the second spring electrode can contact and clamp the battery piece.
The utility model discloses a solar cell annealing device, as preferred technical scheme or another technical scheme, the electrode subassembly is at least two, each electrode subassembly is along the axial equipartition of pivot;
the utility model discloses a solar cell annealing equipment, as preferred technical scheme or another technical scheme, the pivot sets up along the second direction, the place face of second direction with the place face of first direction is parallel; preferably, the first direction and the second direction are parallel or perpendicular.
Solar cell annealing equipment, as preferred technical scheme or another technical scheme, still include: the lamp cooling device is arranged corresponding to the light source and can cool the light source;
solar cell annealing equipment, as preferred technical scheme or another technical scheme, still include: the heat-insulation light-transmitting plate is arranged corresponding to the light source and can be positioned between the light source and the silicon wafer;
solar cell annealing equipment, as preferred technical scheme or another technical scheme, still include: the cooling device is used for cooling the solar cell in the accommodating cavity;
solar cell annealing equipment, as preferred technical scheme or another technical scheme, still include: a heating device; the heating device is arranged in the furnace body and can heat the solar cell to reach a set temperature; preferably, the heating means is an infrared light source having a wavelength in the wavelength range of 750nm to 4000 nm.
The utility model discloses a solar cell annealing equipment, as preferred technical scheme or another technical scheme, the furnace body is formed by first furnace body part and the concatenation of second furnace body part, first opening and second opening are located between first furnace body part and the second furnace body part;
solar cell annealing equipment, as preferred technical scheme or another technical scheme, still include: the cleaning cavity is positioned in the accommodating cavity and is provided with a third opening and a fourth opening which are opposite to each other in the first direction, the third opening is communicated with the first opening, and the fourth opening is communicated with the second opening; and the conveyer belt is arranged in the third opening and the fourth opening in a penetrating mode to form the clean cavity, the conveyer belt can drive the solar cell to move along the first direction, so that the solar cell can enter the clean cavity through the third opening and leave the clean cavity through the fourth opening.
Solar cell annealing equipment, as preferred technical scheme or another technical scheme, still include: a bracket and a driving device;
the conveying device further comprises a driving roller, a transmission roller and a transmission belt, wherein the driving roller and the transmission roller are rotatably connected with the bracket through a rotating shaft, the transmission belt is annular and sleeved outside the driving roller and the transmission roller, and the driving roller can rotate relative to the bracket by taking the rotating shaft as a center to drive the transmission belt to rotate;
drive arrangement includes driving motor, driving belt and drive roller, driving motor's axis with the pivot is parallel, the drive roller with driving motor's output is connected, driving belt is annular and cover and is established the drive roller with the drive roll outside, driving motor can drive the drive roller with driving motor's axis is for the center for the support rotates in order to drive driving belt operation, thereby drives the drive roll with the pivot is for the center rotates the support.
Solar cell annealing equipment, as preferred technical scheme or another technical scheme, the heat sink includes: an air inlet, an air supply port and an air exhaust port; the air inlet is arranged on the furnace body; the air inlet is communicated with the air supply opening, the air supply opening is arranged in the furnace body, and the air exhaust opening is arranged on the furnace body and can exhaust gas in the furnace body.
The utility model discloses a solar cell annealing device, as preferred technical scheme or another technical scheme, the conveyer belt is prepared by the material that specific heat capacity is less than 900J/(kg ℃) (the data when specific heat capacity is 20 ℃);
preferably, the material for manufacturing the conveyor belt is one or at least two selected from PEEK, PTFE, CTFE, PVDF, PVDC, POM, PA, PS, PE, ABS, PMMA, PVF, nylon, polysulfone, PPO, epoxy material, modified material, synthetic material, ceramic, carbon fiber, tungsten alloy wire.
The utility model provides a solar cell annealing equipmentCan be annealed by simultaneously applying light source to irradiate the cell (H can be realized)+Conversion to H0) The method for solving the problem of 'electric injection' is effective to 'B-O light decay', but H cannot be realized+Conversion to H0The method can simultaneously solve the problems of L ID and L eTID, and provides a new solution for ensuring the reliability of products.
In the prior art, "light injection" is easy to realize online production, reduces the manpower input compared with the method of "electric injection", has better long-term operation cost but higher initial investment, is inferior to the method of "electric injection" in inhibiting the "B-O light decay", but can realize H+Conversion to H0The method has good inhibition effect on L eTID, the method of 'electric injection' is not designed to realize on-line production at present, the prior art is off-line design and increases the cost of manpower operation, the method of 'electric injection' is effective on 'B-O light attenuation' at present but can not realize H-O light attenuation+Conversion to H0Adopt the utility model provides an annealing method can solve the problem of "L ID" and "L eTID" simultaneously, has proposed new solution for the reliability of guaranteeing the product, moreover, adopts the annealing method can control L ID within 0.5%, possess good economic benefits and popularization prospect.
Of course, it is not necessary for any product or method of the invention to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a solar cell annealing apparatus provided by the present invention;
fig. 2 is a schematic structural diagram of a rotary annealing device in another solar cell annealing apparatus provided by the present invention.
The reference numbers are as follows:
a: a solar cell sheet;
101: a furnace body; 1091: a rotating shaft;
102: an accommodating chamber; 1092: an electrode assembly;
103: a light source; 1093: a third electrode;
104: a conveying device; 1094: a fourth electrode;
105: a conveyor belt; 1095: a first spring electrode.
106: a first direct current power supply;
107: a first electrode;
108: a second electrode;
109: a rotary annealing device;
110: a lamp cooling device;
111: heat-insulating light-transmitting plates;
112: a heating device;
113: a cooling device.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
With reference to fig. 1, the present embodiment provides a solar cell annealing apparatus, including:
the solar cell module comprises a furnace body 101, wherein an accommodating cavity 102 is formed inside the furnace body 101, and the accommodating cavity 102 can accommodate a solar cell;
and the light source 103 is connected with the furnace body 101, and can irradiate the solar cell to perform light injection annealing.
The light source 103 is connected with the furnace body 101, covers any connection mode of the light source 103 inside or outside the furnace body 101 or other acceptable connection modes, and only needs to satisfy the condition that the light source 103 can irradiate the silicon wafer brushed with silver paste for annealing. Those skilled in the art will appreciate the scope encompassed by the above-described embodiments and the ability to carry out the above-described functions. In addition, the number of the light sources 103 in this embodiment may be one or at least two, which is not limited specifically.
As a preferred or another technical solution, in the solar cell annealing apparatus according to this embodiment, the light source 103 is selected from one or at least two of an infrared IR lamp, an L ED lamp, a xenon lamp, a tungsten lamp, and a laser;
preferably, the light intensity of the light source 103 is not lower than 10 standard suns, and the light intensity of 1 standard sun is 1000W/h.m2(ii) a And/or the spectral wavelength of the light source 103 is in the range of 300nm to 4000 nm.
The intensity of the light source 103 is verified to significantly improve the efficiency of the battery cell, and particularly, L ID can be controlled within 0.5%.
As a preferred technical solution or another technical solution, in the solar cell annealing apparatus according to this embodiment, the furnace body 101 is provided with a first opening and a second opening opposite to each other in a first direction;
the solar cell annealing apparatus further includes: a transfer device 104; the conveying device 104 at least comprises a conveyor belt 105, and the conveyor belt 105 extends along the first direction and penetrates through the first opening and the second opening to penetrate through the accommodating cavity 102; the conveyor belt 105 is used for carrying the solar cell and can drive the solar cell to move along a first direction, so that the solar cell can enter the accommodating cavity 102 from the first opening and leave the accommodating cavity 102 from the second opening.
Therefore, automatic curing and annealing of the solar cell can be effectively realized.
As a preferred or another technical solution, the solar cell annealing apparatus described in this embodiment further includes: a lamp cooling device 110 provided corresponding to the light source 103 and capable of cooling the light source 103;
for explanation and explanation, the corresponding arrangement of the lamp cooling device 110 and the light source 103 means that the lamp cooling device 110 is arranged at a position capable of cooling the light source 103.
As a preferred or another technical solution, the solar cell annealing apparatus described in this embodiment further includes: a heat-insulating and light-transmitting plate 111 which is provided corresponding to the light source 103 and can be positioned between the light source 103 and the silicon wafer;
the position that sets up of thermal-insulated light-passing board 111 can be optional position, only needs to satisfy the messenger the unable direct irradiation of light source 103 is in the brush has the silicon chip of silver thick liquid, the light of light source 103 need pass through earlier thermal-insulated light-passing board 111 back shine again on the brush has the silicon chip of silver thick liquid.
As a preferred or another technical solution, the solar cell annealing apparatus described in this embodiment further includes: the cooling device 113 is used for cooling the solar cells in the accommodating cavity 102;
as a preferred or another technical solution, the solar cell annealing apparatus described in this embodiment further includes: a heating device 112; the heating device 112 is arranged in the furnace body 101 and can heat the solar cell to reach a set temperature; preferably, the heating device 112 is an infrared light source 103 having a wavelength in the wavelength range of 750nm to 4000 nm.
As a preferred technical solution or another technical solution, in the annealing equipment for a solar cell described in this embodiment, the furnace body 101 is formed by splicing a first furnace body part and a second furnace body part, and the first opening and the second opening are located between the first furnace body part and the second furnace body part;
as a preferred or another technical solution, the solar cell annealing apparatus described in this embodiment further includes: the clean cavity is positioned in the accommodating cavity 102 and is provided with a third opening and a fourth opening which are opposite to each other in the first direction, the third opening is communicated with the first opening, and the fourth opening is communicated with the second opening; just conveyer belt 105 wears to establish in third opening and the fourth opening in order to run through clean chamber, conveyer belt 105 can drive solar wafer moves along first direction, so that solar wafer can by the third opening gets into clean chamber and by the fourth opening leaves clean chamber.
Therefore, the clean chamber is arranged to improve the annealing and curing environment of the solar cell and reduce the generation of impurities.
As a preferred or another technical solution, the solar cell annealing apparatus described in this embodiment further includes: a bracket and a driving device;
the conveying device 104 further comprises a driving roller, a transmission roller and a transmission belt, the driving roller and the transmission roller are rotatably connected with the support through rotating shafts, the transmission belt is annular and is sleeved outside the driving roller and the transmission roller, and the driving roller can rotate relative to the support by taking the rotating shafts as centers to drive the transmission belt to rotate;
drive arrangement includes driving motor, driving belt and drive roller, driving motor's axis with the axis of rotation is parallel, the drive roller with driving motor's output is connected, driving belt is the annular and the cover is established the drive roller with the drive roll outside, driving motor can drive the drive roller with driving motor's axis is for the center for the support rotates in order to drive driving belt operation, thereby drives the drive roll with the axis of rotation is for the center rotates the support.
As a preferred or another technical solution, the solar cell annealing apparatus in this embodiment, the temperature reduction device 113 includes: an air inlet, an air supply port and an air exhaust port; the air inlet is arranged on the furnace body 101; the air inlet is communicated with an air supply port, the air supply port is arranged in the furnace body 101, and the air exhaust port is arranged on the furnace body 101 and can exhaust air in the furnace body 101.
As can be understood by those skilled in the art, the solar cell annealing equipment is also provided with a gas distribution pipeline. The air inlet is generally provided with an air inlet pipe, one end of the air inlet pipe is located on the outer side of the furnace body 101, the other end of the air inlet pipe penetrates through the wall of the furnace body 101 and is connected with one end of an air distribution pipeline, the other end of the air distribution pipeline is connected with an air supply port, the air supply port is arranged inside the furnace body 101, organic gas generated by a silicon wafer is discharged through the atmosphere gas of the air distribution pipeline, the atmosphere gas is sent to the air distribution pipeline through the air inlet/air inlet pipe, the atmosphere gas in the air distribution channel is distributed into the furnace body 101 through the air supply port, the atmosphere gas is favorable for organic gas volatilized by silver paste to carry out and be discharged, the atmosphere gas carries organic gas to be discharged through an air outlet, a fan or any air exhaust device acceptable in the field can be additionally arranged at the air. In addition, there may be one or at least two air inlets, and air outlets in this embodiment, and any arrangement acceptable in the art (such as arrangement in a straight line, or staggered arrangement, etc.) should fall within the protection scope of this embodiment.
As a preferred or another technical solution, the conveyor belt 105 is made of a material having a specific heat capacity of less than 900J/(kg ℃) (data of 20 ℃ specific heat capacity);
preferably, the material for manufacturing the transmission belt 105 is selected from PEEK (Polyetheretherketone), PTFE (Polytetrafluoroethylene), CTFE (chlorotrifluoroethylene), PVDF (Polyvinylidene fluoride), PVDC (Polyvinylidene chloride), POM (Polyoxymethylene), PA (polyamide ), PS (Polystyrene), PE (Polyethylene ), ABS (Acrylonitrile butadiene styrene), PMMA (polymethyl methacrylate), PVF (polyvinyl formal, polyvinyl fluoride), nylon (nylon), polysulfone (Poly-phenylene sulfide), PPO (Polyphenylene Oxide), carbon fiber, epoxy, and the like, wherein the material may be a synthetic material, such as a plastic, a synthetic material, a synthetic, Steel, etc., and the material of the transmission belt 9 may further include various modified materials, such as modified PA (polyamide) material, modified PP (Polypropylene) material, modified PC (Polycarbonate) material, modified ABS (Acrylonitrile Butadiene Styrene) material, modified PBT (Polybutylene terephthalate) material, etc. In this embodiment, all materials that need to meet the conditions of temperature resistance exceeding the process temperature, cleanness, and low heat capacity are selected for the material of the conveyor belt 105, and all the materials belong to the protection scope of this embodiment, which is not an example. The characteristics of cleanness can not generate pollution which influences electrical property or appearance of the contact surface of the silicon wafer, and the characteristics of low heat capacity can not influence the temperature rise, temperature drop and temperature gradient of the silicon wafer, so that the annealing of the solar cell can be more stably realized.
Example 2
With reference to fig. 1, on the basis of embodiment 1, the solar cell annealing apparatus according to this embodiment further includes:
a first direct current power supply 106 provided outside the furnace body 101;
a first electrode 107 provided inside the furnace body 101 and electrically connected to a positive electrode of the first dc power supply 106;
a second electrode 108 disposed inside the furnace body 101 and electrically connected to a negative electrode of the first dc power supply 106;
the first electrode 107 and the second electrode 108 are used for contacting the solar cell and performing electric injection annealing on the solar cell.
In the operation of the solar cell annealing apparatus of the present embodiment, the first electrode 107 and the second electrode 108 are respectively in contact with the solar cell, and a voltage is applied thereto to perform the electrical implantation annealing.
It will be appreciated by those skilled in the art that for the purpose of annealing the solar cell and reducing damage, another electrode is applied over the cell and in contact with the cell, the electrode conductive material being any conceivable material and means in the art that must not itself damage the surface of the cell, causing scratches, and must not exert too much force on the cell surface, causing subfissure or breakage of the cell.
In this embodiment, the positions of the first electrode 107 and the second electrode 108 are not limited herein, and only the purpose of applying a voltage to the solar cell for performing the electrical implantation annealing is required.
As a preferred or another technical solution, in the annealing apparatus for a solar cell described in this embodiment, the first electrode 107 is a suspended metal wire, and the metal wire has a set length so as to be able to contact the solar cell;
for explanation and illustration, the set length can be selected according to the actual situation and achieves the following objectives: so that the metal wires can contact the solar cell sheet and not the second electrode 108.
It will be understood by those skilled in the art that the wire can be connected to the first dc power supply 106 in a manner acceptable in the art, and the embodiment is not limited thereto.
The purpose of not damaging the surface of the battery and not damaging the structure of the battery can be met by adopting the hanging metal wire, and the metal wire is preferably silver wire.
Preferably, the delivery device 104 includes the second electrode 108;
for purposes of illustration and explanation, the delivery device 104 includes the second electrode 108, and covers the case where a portion of the delivery device 104 is an electrode, or where an electrode is added to the delivery device 104.
For example, the following steps are carried out: the conveyor belt 105 is made of conductive material and serves as a second electrode 108; or a conductive material is added on the conveyor belt 105, and the conductive material can be in contact with the solar cell and cooperate with the first electrode 107 to apply voltage to the solar cell.
It will be appreciated by those skilled in the art that any means acceptable in the art for connecting the second electrode 108 to the first dc power source 106 is possible and within the scope of the present embodiment.
Example 3
With reference to fig. 2, on the basis of embodiment 1, the solar cell annealing apparatus according to this embodiment further includes:
a rotary annealing device 109, wherein the rotary annealing device 109 is arranged outside the furnace body 101; the rotary annealing device 109 comprises a second direct current power supply, a rotating shaft 1091 and an electrode assembly 1092, wherein:
the second direct current power supply is arranged outside the furnace body 101;
the electrode assembly 1092 includes a third electrode 1093 and a fourth electrode 1094, the third electrode 1093 being electrically connected to a positive electrode of the second dc power source, the fourth electrode 1094 being electrically connected to a negative electrode of the second dc power source; the third electrode 1093 and the fourth electrode 1094 are rotatably connected by the rotation shaft 1091, and the third electrode 1093 and the fourth electrode 1094 can relatively rotate around the rotation shaft 1091 to hold the battery piece.
Thus, the spin annealing device 109 is disposed outside the furnace body 101, and may be disposed before or after the process of the light implantation annealing in a process angle. During operation of the spin annealing device 109, the solar cell is clamped by the third electrode 1093 and the fourth electrode 1094, and a voltage is applied thereto to perform electro-implantation annealing.
Preferably, the third electrode 1093 includes a first electrode 107 plate and a first spring electrode 1095, the first spring electrode 1095 is disposed on the first surface of the first electrode 107 plate, the fourth electrode 1094 includes a second electrode 108 plate and a second spring electrode disposed on the first surface of the second electrode 108 plate, and the third electrode 1093 and the fourth electrode 1094 can rotate relative to the furnace body 101 around the rotation shaft 1091 so that the second spring electrode and the second spring electrode can contact and clamp the battery piece.
Thus, the addition of the spring electrode increases the contact between the third electrode 1093 and the fourth electrode 1094 and the solar cell, thereby allowing the solar cell to make good contact with the electrode assembly 1092 and avoiding the occurrence of a situation where no or complete electrical implantation annealing is performed.
As a preferred or another technical solution, in the annealing apparatus for solar cells of this embodiment, there are at least two electrode assemblies 1092, and each electrode assembly 1092 is uniformly distributed along the axial direction of the rotating shaft 1091;
thus, with multiple electrode assemblies 1092, an automated process can be achieved with an actuator or other device as is acceptable and contemplated in the art.
As a preferable technical solution or another technical solution, in the solar cell annealing apparatus according to this embodiment, the rotating shaft 1091 is disposed along a second direction, and a plane of the second direction is parallel to a plane of the first direction; preferably, the first direction and the second direction are parallel or perpendicular.
To better illustrate the operation and effect of the solar cell annealing apparatus described in examples 1 to 3, the present invention also provides application examples 4 to 9.
Example 4
The embodiment provides an annealing method of a solar cell, which comprises the following steps:
the solar cell annealing equipment in embodiment 2 is used for simultaneously performing light injection annealing and electrical injection annealing on a solar cell, and the specific parameters are as follows:
and (3) light injection annealing: irradiating the solar cell for 10min by adopting a light source 103 with the wavelength of 300nm to 4000nm to carry out light injection annealing; and the light of the light source 103The intensity of the light is 10 standard suns, and the light intensity of 1 standard sun is 1000W/h.m2。
And (3) electric injection annealing: electrifying the solar cell to perform electric injection annealing, and controlling the current to be 100-1000 mA/cm during electrifying2Within the range, the time of the electrical implantation annealing is not more than 1 min.
For explanation and explanation, the mixed light source 103 is employed for wavelengths of 300nm to 4000nm in the present embodiment, and any light source 103 of the mixed light source 103 falls within this range. Through verification, the inventor finds that the light annealing of the solar cell can be well realized by adopting the light source 103 with the small-wave range in the spectral range, such as the mixed light source 103 with the wavelength of 300-.
The energizing current provided in the embodiment can achieve the technical effect correspondingly, and as supplementary explanation, when the injection current is high, the process speed is high, but the temperature rise of the battery is also high, and the energizing current is implemented in an auxiliary way usually by cooling. The skilled in the art can understand that within the scope provided by the present invention, no matter the magnitude of the current can achieve the corresponding technical effect, and the skilled in the art can adjust the time of the electrical injection annealing according to the actual production needs, which does not need to pay creative labor, and all should belong to the scope of the present invention.
Example 5
This example provides an annealing method of a solar cell, which is different from example 4 in that,
the light intensity of the light source 103 is 60 standard suns, and the light intensity of 1 standard sun is 1000W/h.m2(ii) a The irradiation time of the light source 103 was 0.2 min.
Example 6
This example provides an annealing method of a solar cell, which is different from example 5 in that a light implantation annealing process and an electrical implantation annealing process are performed at 70 to 300 ℃.
The verification proves that if the same L ID inhibition index is required to be reached, the process time is longer under the condition of 70-150 ℃, the process time is shortened at 250 ℃ for 150 plus materials, and the process time is shorter at 300 ℃ for 250 plus materials.
Example 7
The embodiment provides an annealing method of a solar cell, which performs annealing by using the annealing apparatus of the solar cell described in embodiment 2, and includes the following steps:
irradiating the solar cell with the light source 103 to perform the light injection annealing;
a step of contacting the first electrode 107 and the second electrode 108 with the solar cell sheet to perform electrical implantation annealing; the step of electrical implantation annealing and the step of light implantation annealing are synchronized.
The specific process parameters are as follows:
and (3) light injection annealing: irradiating the solar cell for 10min by adopting a light source 103 with the wavelength of 300nm to 4000nm to carry out light injection annealing; the light intensity of the light source 103 is 10 standard suns, and the light intensity of 1 standard sun is 1000W/h.m2。
And (3) electric injection annealing: electrifying the solar cell to perform electric injection annealing, and controlling the current to be 100-1000 mA/cm during electrifying2Within the range, the time of the electrical implantation annealing is not more than 1 min.
Example 8
The embodiment provides an annealing method of a solar cell, which performs annealing by using the annealing apparatus of the solar cell described in embodiment 3, and includes the following steps:
firstly, the light source 103 irradiates the solar cell to carry out the light injection annealing;
and then contacting the electrode component 1092 with the solar cell to perform a step of electrical injection annealing.
The specific process parameters are as follows:
and (3) light injection annealing: irradiating the solar cell for 10min by adopting a light source 103 with the wavelength of 300nm to 4000nm to carry out light injection annealing; the light intensity of the light source 103 is 10 standard suns, and the light intensity of 1 standard sun is 1000W/h.m2。
Example 9
The embodiment provides an annealing method of a solar cell, which performs annealing by using the annealing apparatus of the solar cell described in embodiment 3, and includes the following steps:
firstly, contacting the electrode component 1092 with the solar cell to perform electric injection annealing;
and irradiating the solar cell with the light source 103 to perform the light implantation annealing.
The specific process parameters are as follows:
and (3) light injection annealing: irradiating the solar cell for 10min by adopting a light source 103 with the wavelength of 300nm to 4000nm to carry out light injection annealing; the light intensity of the light source 103 is 10 standard suns, and the light intensity of 1 standard sun is 1000W/h.m2。
And (3) electric injection annealing: electrifying the solar cell to perform electric injection annealing, and controlling the current to be 100-1000 mA/cm during electrifying2Within the range, the time of the electrical implantation annealing is not more than 1 min.
Test example 1
To better illustrate the application effect of the annealing apparatus and annealing method for solar cells provided by the present invention, the test example provides data of solar cells obtained after actual scale production, as shown in tables 1 to 3:
wherein, the process of example 7 (simultaneous photo-implantation annealing and electrical implantation annealing) was used in table 1.
Groups of experiment 3 were run in parallel, labeled ①, ②, ③, respectively, and the mean was calculated.
TABLE 1
Table 2 shows the process of example 8 (light implantation annealing followed by electrical implantation annealing).
Groups of experiment 3 were run in parallel, labeled ①, ②, ③, respectively, and the mean was calculated.
TABLE 2
Table 3 shows the process of example 9 (electrical implantation annealing followed by light implantation annealing).
Groups of experiment 3 were run in parallel, labeled ①, ②, ③, respectively, and the mean was calculated.
TABLE 3
Therefore, the solar cell annealing equipment provided by the utility model can reduce the attenuation rate of the conversion efficiency of the solar cell to below 0.5%, even to about 0.1%.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
Although the invention has been described in detail in the foregoing by way of general description, specific embodiments and experiments, it will be apparent to those skilled in the art that certain modifications and improvements may be made thereto based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (8)
1. A solar cell annealing apparatus, comprising:
the solar cell heating furnace comprises a furnace body, a heating device and a heating device, wherein an accommodating cavity is formed inside the furnace body and can accommodate a solar cell;
the light source is connected with the furnace body and can irradiate the solar cell to carry out light injection annealing, and the light source is selected from one or at least two of an infrared IR lamp, an L ED lamp, a xenon lamp, a tungsten lamp and laser;
the light intensity of the light source is not lower than 10 standard suns, and the light intensity of 1 standard sun is 1000W/h.m2(ii) a And/or the spectral wavelength of the light source is in the range of 300nm to 4000 nm.
2. The solar cell annealing apparatus according to claim 1, wherein the furnace body is provided with first and second openings opposed in a first direction;
the solar cell annealing apparatus further includes: a conveying device; the conveying device at least comprises a conveying belt, and the conveying belt extends along the first direction and penetrates through the first opening and the second opening to penetrate through the accommodating cavity; the conveying belt is used for bearing the solar cell pieces and can drive the solar cell pieces to move along a first direction, so that the solar cell pieces can enter the accommodating cavity from the first opening and leave the accommodating cavity from the second opening.
3. The solar cell annealing apparatus of claim 2, further comprising:
the first direct current power supply is arranged outside the furnace body;
the first electrode is arranged in the furnace body and is electrically connected with the positive electrode of the first direct current power supply;
the second electrode is arranged in the furnace body and is electrically connected with the negative electrode of the first direct current power supply;
the first electrode and the second electrode are used for contacting the solar cell and performing electric injection annealing on the solar cell.
4. The solar cell annealing apparatus of claim 3, wherein the first electrode is a suspended wire having a set length to be able to contact the solar cell sheet; the delivery device includes the second electrode.
5. The solar cell annealing apparatus according to claim 1 or 2, further comprising:
the rotary annealing device is arranged outside the furnace body; the rotary annealing device comprises a second direct-current power supply, a rotating shaft and an electrode assembly, wherein:
the second direct current power supply is arranged outside the furnace body;
the electrode assembly comprises a third electrode and a fourth electrode, the third electrode is electrically connected with the positive electrode of the second direct current power supply, and the fourth electrode is electrically connected with the negative electrode of the second direct current power supply; the third electrode and the fourth electrode are rotatably connected through the rotating shaft, and the third electrode and the fourth electrode can relatively rotate by taking the rotating shaft as a center to clamp the battery piece.
6. The solar cell annealing apparatus according to claim 5, wherein the third electrode comprises a first electrode plate and a first spring electrode, the first spring electrode is disposed on the first surface of the first electrode plate, the fourth electrode comprises a second electrode plate and a second spring electrode, the second spring electrode is disposed on the first surface of the second electrode plate, and the third electrode and the fourth electrode can relatively rotate with respect to the furnace body centering on the rotating shaft so that the second spring electrode and the second spring electrode can contact and clamp the cell piece;
the number of the electrode assemblies is at least two, and the electrode assemblies are uniformly distributed along the axial direction of the rotating shaft; and/or the rotating shaft is arranged along a second direction, and the plane of the second direction is parallel to the plane of the first direction; the first direction and the second direction are parallel or perpendicular.
7. The solar cell annealing apparatus according to any one of claims 1 to 4, further comprising: the lamp cooling device is arranged corresponding to the light source and can cool the light source;
and/or the presence of a gas in the gas,
the solar cell annealing apparatus further comprises: the heat-insulation light-transmitting plate is arranged corresponding to the light source and can be positioned between the light source and the silicon wafer;
and/or the presence of a gas in the gas,
the solar cell annealing apparatus further comprises: the cooling device is used for cooling the solar cell in the accommodating cavity;
and/or the presence of a gas in the gas,
the solar cell annealing apparatus further comprises: a heating device; the heating device is arranged in the furnace body and can heat the solar cell to reach a set temperature; the heating device is an infrared light source with the wavelength ranging from 750nm to 4000 nm.
8. The solar cell annealing device according to any one of claims 2 to 4, wherein the conveyor belt is one of PEEK, PTFE, CTFE, PVDF, PVDC, POM, PA, PS, PE, ABS, PMMA, PVF, nylon, polysulfone, PPO, epoxy, modified material, synthetic material, ceramic, carbon fiber, tungsten alloy wire.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112670372A (en) * | 2020-12-25 | 2021-04-16 | 浙江正泰太阳能科技有限公司 | Method for reducing series resistance of P-type crystalline silicon battery |
| CN113571605A (en) * | 2021-07-20 | 2021-10-29 | 泰州中来光电科技有限公司 | Method for eliminating hydrogen-induced attenuation of passivated contact solar cell and application |
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2020
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112670372A (en) * | 2020-12-25 | 2021-04-16 | 浙江正泰太阳能科技有限公司 | Method for reducing series resistance of P-type crystalline silicon battery |
| CN113571605A (en) * | 2021-07-20 | 2021-10-29 | 泰州中来光电科技有限公司 | Method for eliminating hydrogen-induced attenuation of passivated contact solar cell and application |
| CN113571605B (en) * | 2021-07-20 | 2023-12-29 | 泰州中来光电科技有限公司 | Method for eliminating hydrogen-induced attenuation of passivation contact solar cell and application |
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