阅读说明：本技术 一种用于太阳能电池生产的固化钝化一体炉 (A integrative stove of solidification passivation for solar cell production ) 是由 刘欢 张海森 王义方 胡炜 于 2020-07-23 设计创作，主要内容包括：本申请提供了一种用于太阳能电池生产的固化钝化一体炉,包括炉体、形成于所述炉体内并沿所述炉体的长度方向延伸的传输通道；所述固化钝化一体炉还包括设置于所述炉体内同一区段的固化与钝化区、设置于所述固化与钝化区并可同时作为固化热源和辐照光源的光源系统。本申请通过设置在固化与钝化区的光源系统同时实现太阳能电池的固化与钝化过程,简化工艺,保证固化、钝化效果,还能降低设备制造成本及占地面积,尤其适于HJT电池的生产制备。(The application provides a curing and passivating integrated furnace for solar cell production, which comprises a furnace body and a transmission channel, wherein the transmission channel is formed in the furnace body and extends along the length direction of the furnace body; the curing and passivating integrated furnace also comprises a curing and passivating region arranged in the same section in the furnace body, and a light source system which is arranged in the curing and passivating region and can be used as a curing heat source and an irradiation light source at the same time. The solar cell curing and passivating process is realized through the light source system arranged in the curing and passivating region, the process is simplified, the curing and passivating effects are guaranteed, the manufacturing cost and the occupied area of equipment can be reduced, and the solar cell curing and passivating system is particularly suitable for production and preparation of the HJT cell.)

1. The utility model provides an integrative stove of solidification passivation for solar cell production, includes the furnace body, is formed in the furnace body and along the transmission path of the length direction extension of furnace body which characterized in that: the curing and passivating integrated furnace also comprises a curing and passivating region arranged in the same section in the furnace body, and a light source system which is arranged in the curing and passivating region and can be used as a curing heat source and an irradiation light source at the same time.

2. The curing and passivating integrated furnace of claim 1, wherein: still be equipped with drying zone and cooling zone in the furnace body, drying zone, solidification and passivation district, cooling zone are followed the length direction of furnace body sets gradually in succession, integrative stove of solidification passivation still includes the setting and is in the heating device in drying zone.

3. The curing and passivating integrated furnace of claim 2, wherein: the heating device comprises a heating pipe which is transversely arranged in the transmission channel in a penetrating way and is arranged at an upper layer and a lower layer at intervals, and an auxiliary heater which is arranged close to the end part of the heating pipe.

4. The curing and passivating integrated furnace of claim 2, wherein: the curing and passivating integrated furnace further comprises an exhaust gas treatment device communicated with the conveying channel, and the exhaust gas treatment device comprises a combustion tower arranged on one side of the drying area or the curing and passivating area adjacent to the drying area.

5. The curing and passivating integrated furnace of claim 1, wherein: the curing and passivating region comprises a plurality of temperature regions which are sequentially arranged along the length direction of the furnace body, and the light source system comprises light source modules which are respectively arranged in each temperature region and are mutually independently controllable.

6. The curing and passivating integrated furnace of claim 1 or 5, wherein: the curing and passivating integrated furnace also comprises a conveying device arranged in the conveying channel and a cooling device used for adjusting the temperature of the curing and passivating region; the light source system and the cooling device are respectively arranged on the upper side and the lower side of the transmission device.

7. The curing and passivating integrated furnace of claim 6, wherein: the cooling device comprises a condenser arranged below the transmission device and a fan arranged below the condenser, the solidification and passivation integrated furnace further comprises a power module connected with the light source system, and the power module is arranged on the air outlet side of the fan.

8. The curing and passivating integrated furnace of claim 1, wherein: and the curing and passivating region is also provided with an auxiliary heating device.

9. The curing and passivating integrated furnace of claim 8, wherein: the curing and passivating integrated furnace further comprises a transmission device which is arranged in the transmission channel and used for transmitting the solar cells, and the light source and the auxiliary heating device are respectively arranged on the upper side and the lower side of the transmission device.

10. The curing and passivating integrated furnace of claim 1, wherein: and a roll shaft or a flexible conveying belt for conveying the solar cell is arranged in the conveying channel.

Technical Field

The invention relates to the technical field of photovoltaic production, in particular to a curing and passivating integrated furnace for solar cell production.

Background

Compared with other renewable energy sources, the solar power generation technology has a plurality of outstanding advantages. Compared with the prior art, the crystalline silicon solar cell is still the most widely applied photovoltaic product in the domestic and foreign markets due to lower raw material cost and relatively mature technology. For crystalline silicon solar cells, the industrialization technology is relatively mature, but the requirements of domestic and foreign markets on cell conversion efficiency and stability are continuously improved.

The HJT battery is mainly characterized in that an intrinsic alpha-Si and H layer is deposited on the front surface/the back surface of an n-type silicon wafer, a p-type alpha-Si and H layer and an n-type alpha-Si and H layer are respectively deposited, and then metallization is carried out, so that the HJT battery has the advantages of high conversion efficiency, low light attenuation, low temperature coefficient and the like, and is an ideal battery product. Currently, many manufacturers in the industry actively research the technology and equipment of the HJT battery to take the advantage of the industry. In the production of the HJT battery, a curing furnace is mostly adopted to carry out low-temperature curing on electrode slurry on the surface of the battery, and a passivation furnace can also be adopted to carry out passivation treatment on the HJT battery. In order to realize continuous production and avoid battery carrying damage, the industry also discloses curing and passivating equipment, which integrally connects the existing passivating furnace at the rear end of the curing furnace, but has larger equipment floor area and higher cost, and is inconvenient for field assembly and subsequent maintenance.

In view of the above, there is a need for a new integrated furnace for curing and passivation in solar cell production.

Disclosure of Invention

The invention aims to provide a curing and passivating integrated furnace for solar cell production, which can be used for simultaneously curing and passivating solar cells, thereby improving the production efficiency and reducing the equipment cost and the installation requirement; and the passivation effect is ensured, and the battery performance is improved.

In order to achieve the above purpose, the present application provides a curing and passivating integrated furnace for solar cell production, which includes a furnace body, a transmission channel formed in the furnace body and extending along the length direction of the furnace body; the curing and passivating integrated furnace also comprises a curing and passivating region arranged in the same section in the furnace body, and a light source system which is arranged in the curing and passivating region and can be used as a curing heat source and an irradiation light source at the same time.

As the further improvement of this application embodiment, still be equipped with drying zone and cooling space in the furnace body, drying zone, solidification and passivation district, cooling space are followed the length direction of furnace body sets up in proper order in succession, integrative stove of solidification passivation still is including setting up the heating device of drying zone.

As a further improvement of the embodiment of the application, the heating device comprises a heating pipe which is transversely arranged in the conveying channel in a penetrating manner and is arranged at an interval of an upper layer and a lower layer, and an auxiliary heater which is arranged at the end part of the heating pipe in an adjacent manner.

As a further improvement of the embodiment of the application, the curing and passivating integrated furnace further comprises an exhaust gas treatment device communicated with the conveying channel, and the exhaust gas treatment device comprises a combustion tower arranged on one side of the drying area or the curing and passivating area adjacent to the drying area.

As a further improvement of the embodiment of the application, the curing and passivating region comprises a plurality of temperature regions which are sequentially arranged along the length direction of the furnace body, and the light source system comprises light source modules which are respectively arranged in each temperature region and are mutually independently controllable.

As a further improvement of the embodiment of the application, the curing and passivating integrated furnace further comprises a conveying device arranged in the conveying channel, and a cooling device used for adjusting the temperature of the curing and passivating area; the light source system and the cooling device are respectively arranged on the upper side and the lower side of the transmission device.

As a further improvement of the embodiment of the application, the cooling device comprises a condenser arranged below the transmission device and a fan arranged below the condenser, the solidification and passivation integrated furnace further comprises a power module connected with the light source system, and the power module is arranged on the air outlet side of the fan.

As a further improvement of the embodiment of the application, the curing and passivating area is also provided with an auxiliary heating device.

As a further improvement of the embodiment of the application, the curing and passivating integrated furnace further comprises a transmission device which is arranged in the transmission channel and used for transmitting the solar cell, and the light source and the auxiliary heating device are respectively arranged on the upper side and the lower side of the transmission device.

As a further improvement of the embodiment of the application, a roller shaft or a flexible conveyor belt for conveying the solar cell is arranged in the conveying channel.

The beneficial effect of this application is: by adopting the curing and passivating integrated furnace, the solar cell is simultaneously subjected to heating curing and irradiation passivation through the light source system, the cell preparation process is integrated and simplified, the curing and passivating performances are ensured, and the curing and passivating integrated furnace is suitable for production and preparation of the HJT cell; meanwhile, the manufacturing cost and the floor area of the equipment can be effectively reduced.

Drawings

FIG. 1 is a schematic view of the overall structure of a curing and passivating integrated furnace of the present application;

FIG. 2 is a schematic plan view of a curing and passivating integrated furnace of the present application;

FIG. 3 is a schematic plan view of another angle of the curing and passivating integrated furnace of the present application;

FIG. 4 is a schematic view of a portion of the conveyor of the curing and passivation integrated furnace of the present application;

FIG. 5 is a schematic view of a portion of a conveying device of another embodiment of the curing and passivating integrated furnace of the present application;

FIG. 6 is a schematic view of a part of a conveying device of another embodiment of the curing and passivating integrated furnace.

100-curing and passivating an integrated furnace; 1-furnace body; 11-an air inlet; 12-a power supply module; 101-a transmission channel; 102-a drying zone; 103-curing and passivating zone; 104-a cooling zone; 2-a combustion tower; 3-a roll shaft; 31-a carrier; 41-a condenser; 42-a fan; 200-solar cell.

Detailed Description

The present invention will be described in detail below with reference to embodiments shown in the drawings. The present invention is not limited to the embodiment, and structural, methodological, or functional changes made by one of ordinary skill in the art according to the embodiment are included in the scope of the present invention.

Referring to fig. 1, the curing and passivating integrated furnace 100 provided by the present application includes a furnace body 1, and a transmission channel 101 formed in the furnace body 1 and extending along a length direction of the furnace body 1.

As shown in fig. 2 to 4, a drying zone 102, a curing and passivating zone 103 and a cooling zone 104 are arranged in the furnace body 1 in sequence along the length direction, and the drying zone 102, the curing and passivating zone 103 and the cooling zone 104 can be assembled by a single or different furnace body modules. The curing and passivating region 103 is arranged in the same section of the furnace body 1, and a light source system which is used as a curing heat source and an irradiation light source simultaneously is arranged in the curing and passivating region 103. That is to say, the solar cells 200 conveyed to the curing and passivating region 103 along the conveying channel 101 are cured and passivated at the same time in the section, so that the overall length and floor area requirements of the curing and passivating integrated furnace 100 are effectively reduced, and the production efficiency of the solar cells 200 is also improved.

Here, the solar cell 200 is an HJT cell, and mostly uses resin-cured low-temperature silver paste, and the curing temperature thereof is usually between 200 and 250 ℃, and high-temperature sintering is not required. As an example, the light source system may adopt an LED lamp panel, and the light source system may perform illumination passivation on the solar cells 200 flowing through the curing and passivation region 103, and at the same time, the light source may also be used as a curing heat source to maintain the curing and passivation region 103 at a temperature suitable for curing the solar cells 200. The working state of the light source system is adjusted according to the curing temperature and the passivation irradiation intensity required by the solar cell 200, so that the curing and passivation processes of the solar cell 200 can be completed in the curing and passivation region 103 at the same time. Compared with the prior art, the equipment floor space and the cost are greatly reduced, and the production efficiency and the battery performance are improved by integrating the drying, curing and passivating processes.

In the practical application process, the curing and passivating region 103 specifically includes a plurality of temperature regions sequentially arranged along the length direction of the furnace body 1, and the light source system includes light source modules which are respectively arranged in each temperature region and are independently controllable. Each temperature zone is also provided with a corresponding temperature measuring device, and the curing and passivation zone 103 can keep stable and uniform temperature and irradiation atmosphere by adjusting the light source modules of different temperature zones, thereby being beneficial to the production of the solar cell 200. The extension length of the curing and passivation region 103 and the number of the temperature regions can be determined according to actual production requirements, and here, the curing and passivation region 103 includes 12 temperature regions arranged in sequence.

The curing and passivating integrated furnace 100 further comprises a heating device arranged in the drying area 102 and a cooling system arranged in the cooling area 104, wherein the heating device is used for drying the solar cell 200 and removing the solvent in the electrode slurry on the surface of the solar cell 200; the cooling system is used for cooling the solar cell 200 after the solidification and passivation.

Generally, the heating device includes heating pipes transversely penetrating the transmission channel 101, the heating pipes are arranged in two layers at intervals up and down along the height direction, and the solar cells 200 are heated more uniformly when passing between the two layers of heating pipes. Of course, to improve the temperature uniformity in the cross direction of the drying zone 102, the heating device further comprises an auxiliary heater disposed adjacent to the end of the heating tube. The heating pipe and the auxiliary heater are usually infrared heating pipes, and of course, the heating device may also adopt heating wires, xenon lamps and other heat sources, which are not described herein.

In order to avoid the direct emission of the solvent volatilized from the surface of the solar cell 200 to influence the environment and reduce the potential safety hazard, the curing and passivating integrated furnace 100 further comprises a waste gas treatment device communicated with the transmission channel 101. The exhaust gas treatment device includes a combustion tower 2 disposed at a side of the drying zone 102 or the curing and passivating zone 103 adjacent to the drying zone 102. The solvent volatilized from the surface of the solar cell 200 enters the combustion tower 2 along with the airflow under the action of the corresponding air draft mechanism, and is discharged outwards after the combustion is completed in the combustion tower 2.

Besides, the curing and passivating integrated furnace 100 further comprises a conveying device arranged in the conveying channel 101 and used for conveying the solar cells 200, and a cooling device used for adjusting the temperature of the curing and passivating region 103; the light source system and the cooling device are respectively arranged on the upper side and the lower side of the transmission device.

The conveying device comprises a plurality of roller shafts 3 arranged in the conveying channel 101, and at least one end of each roller shaft 3 is rotatably connected to the corresponding furnace body 1 and driven by the corresponding driving mechanism to synchronously rotate. Here, a plurality of the roller shafts 3 are sequentially and horizontally arranged along the extending direction of the conveying passage 101, and a plurality of bearing parts 31 for bearing the solar cells 200 are further disposed on the roller shafts 3, so that the conveying of the corresponding solar cells 200 is realized by the rotation of the roller shafts 3. In other embodiments of the present application, a corresponding metal mesh belt may also be disposed in the transmission channel 101 to realize the transmission of the solar cell 200.

The temperature in the furnace body 1 is usually not more than 300 ℃, and the transmission device can also adopt a high-temperature-resistant flexible conveyor belt to transport the solar cells 200, so that the manufacturing and maintenance cost of the equipment can be reduced. The flexible conveyor belt can be made of ceramic fiber ropes, Teflon and other materials.

The top of the transmission channel 101 is provided with an air inlet 11; the cooling device comprises a condenser 41 arranged below the conveying device and a fan 42 arranged below the condenser 41. When the temperature of the curing and passivating region 103 exceeds the curing requirement of the solar cell 200, the cooling device can reduce the temperature of the curing and passivating region 103 through air cooling without adjusting the irradiation intensity of the light source system. Particularly, a power module 12 connected to the light source system is further disposed in the furnace body 1, the power module 12 is disposed on the air outlet side of the fan 42, and the fan 42 can blow the airflow flowing through the condenser 41 to the power module 12 to lower the power module 12.

In other embodiments of the present application, the curing and passivation region 103 is further provided with an auxiliary heating device (not shown), which cooperates with the light source system, so that the solar cell 200 can complete the curing and passivation process at the same time under more suitable temperature and irradiation conditions. In other words, when the irradiation intensity emitted by the light source system meets the passivation requirement of the solar cell 200, but the temperature of the cured passivation region 103 does not meet the curing requirement of the solar cell 200, the temperature compensation can be performed by the auxiliary heating device. The auxiliary heating device may be an electric heating tube, an electric heating wire or other heat sources, and the auxiliary heating device may be disposed below the roller shaft 3 to prevent the light emitted from the light emitting member 21 toward the solar cell 200 from being blocked.

In another embodiment of the present application, referring to fig. 5, the transportation channel 101 of the curing and passivating integrated furnace 100 adopts a multi-track design, that is, two or more solar cells 200 can be transported simultaneously along the transverse direction, so as to improve the productivity. At this time, the light source system needs to be designed accordingly, so that the solar cell 200 flowing through the curing and passivation region is stably cured and passivated.

In another embodiment of the present application, referring to fig. 6, the light source system is disposed on both the upper and lower sides of the transmission channel 101, so that the lower surface of the solar cell 200 can also receive a substantially uniform irradiation, and the passivation requirement of the double-sided cell can be better satisfied. The roller shaft 3 of the transmission device can be arranged to be in a cantilever type structure, the roller shaft 3 is arranged in a group in pairs and is arranged along the transverse interval, the tail end of the roller shaft 3 is provided with a bearing part 31 which is in contact with the edge of the solar cell 200, and the bearing part 31 is formed with a conical bearing surface. In this case, the auxiliary heating devices may be preferably disposed laterally close to both sides of the transfer passage 101 to prevent light shielding.

To sum up, integrative stove 100 of this application solidification passivation carries out the drying through drying zone 102 to solar cell 200, and the rethread setting is in solidification is right with the light source system of passivation district 103 solar cell 200 solidifies and passivation simultaneously, improves the battery performance to effectively reduce equipment area and cost, improve production efficiency.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.