CN216818361U

CN216818361U - Novel sintering light injection all-in-one machine for solar cell

Info

Publication number: CN216818361U
Application number: CN202220428059.0U
Authority: CN
Inventors: 王会; 谭建辉; 戴向荣
Original assignee: Suzhou N Single Intelligent Technology Co ltd
Current assignee: Suzhou N Single Intelligent Technology Co ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-06-24
Anticipated expiration: 2032-02-28

Abstract

The utility model discloses a sintering light injection all-in-one machine of a solar cell, which comprises at least one furnace body, wherein the furnace body is arranged along the conveying direction of a cell, and a working area in the furnace body comprises a drying area, a sintering area, a multifunctional area, a light injection area and a cooling area which are sequentially arranged; the transmission device is used for inputting the battery pieces, sequentially conveying the battery pieces, passing through each working area in the furnace body and then outputting the battery pieces out of the furnace body. The multifunctional region includes a cooling portion and a heating portion or both of them provided in this order along the conveying direction of the battery piece. According to the sintering light injection all-in-one machine of the solar cell, the drying area, the sintering area, the multifunctional area, the light injection area and the cooling area are integrated, so that the processing efficiency of the cell piece is greatly improved; in addition, through setting up multi-functional district, can realize carrying out rapid cooling rapid heating's rapid annealing to the battery piece, carry out passivation treatment in the light injection district to the battery piece after annealing afterwards, can promote the electrical property of battery piece.

Description

Novel sintering light injection all-in-one machine for solar cell

Technical Field

The utility model relates to the technical field of photovoltaic production, in particular to a high-temperature sintering and light injection integrated machine for a solar cell.

Background

With the rapid development of the photovoltaic industry, the market demand for the cell pieces is increasing, and the demand for the number of the cell pieces is also increasing. However, functional requirements of different industries for the battery pieces are different, and therefore, in order to meet processing requirements of battery pieces with different specifications and types, the processing technology of the battery pieces needs to be adjusted, and thus, the process requirements for slurry sintering and light injection on the surfaces of the battery pieces are various.

At present, the processing technology of the battery piece printed with the silver paste mainly comprises the links of drying, sintering, light injection and cooling. However, most of the existing battery sintering and light injection equipment are split, and the processing efficiency and the performance of the battery are still greatly improved.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides a novel sintering light injection all-in-one machine for a solar cell, which can meet the requirement of performing rapid temperature rise and temperature reduction treatment on a cell in a sintering light injection process of the cell by arranging a multifunctional area; the battery piece is irradiated by the high-light strong light sources with different wave bands arranged in the multifunctional area, so that the efficiency of the battery piece can be improved.

The novel sintering light injection integrated machine for the solar cell comprises at least one furnace body, wherein a working area in the furnace body comprises a drying area, a sintering area, a multifunctional area, a light injection area and a cooling area which are sequentially arranged; and the conveying device is used for inputting and outputting the battery pieces into and out of the furnace body and conveying the battery pieces sequentially through each working area in the furnace body, the multifunctional area is selected from at least one of a heating part and a cooling part, the heating part is used for heating the sintered battery pieces, and the cooling part is used for cooling the sintered battery pieces. According to the sintering light injection all-in-one machine of the solar cell, the drying area, the sintering area, the multifunctional area, the light injection area and the cooling area are integrated, so that the processing efficiency of the cell piece is greatly improved; in addition, through setting up multi-functional district, can realize carrying out rapid cooling rapid heating's rapid annealing to the battery piece, carry out passivation treatment in the light injection district to the battery piece after annealing afterwards, can promote the electrical property of battery piece.

Further, the heating part comprises at least one heating unit, each heating unit comprises at least one heating cavity, and a heating element is arranged in the heating cavity. Therefore, the setting number of the heating units can be adjusted according to needs, and the processing requirements of different battery pieces can be met in the multifunctional area.

Further, the heating element is selected from at least one of an electromagnetic heating element, an infrared heating element, an ultraviolet heating element and an LED heating element. Therefore, in the process of processing the battery, the light sources with different wave band wavelengths are selected, and different temperature curves and different illumination intensities can be set, so that the passivation performance of the battery piece is improved, and the battery efficiency is improved.

Further, the cooling portion includes lid and cooling portion lower casing on the cooling portion, the lid forms the cooling cavity jointly with the cooling portion lower casing on the cooling portion, still include with the hot-blast discharge pipe that the cooling cavity is linked together still be provided with water-cooling structure in the lid on the cooling portion. The water cooling structure is also internally provided with a cold water channel, and the cold water channel is also internally provided with a radiating fin, so that the effect of cooling is realized by circulating the cold water of the cold water channel.

Furthermore, the drying zone comprises a heating cavity, a first waste gas treatment part is arranged at an inlet close to the drying zone, an auxiliary heating device is arranged at an outlet close to the drying zone, the auxiliary heating device comprises an auxiliary heating shell communicated with the cavity of the drying zone, and a heating element and an air blower are further arranged in the auxiliary heating shell. Through under the effect of auxiliary heating device, can make the waste gas in the drying zone get into first exhaust-gas treatment portion fast to be discharged after incineration disposal.

Further, the sintering area includes last heating chamber casing and the lower heating chamber casing that can separate each other, go up heating chamber casing and the lower heating chamber casing and can splice each other and form the heating chamber, transmission device passes and extends to many functional areas from the middle part in heating chamber still be provided with at least one second exhaust-gas treatment portion on going up the heating chamber casing for volatile organic matter in the quick discharge solar wafer sintering process promotes the cell electrical property in the sintering.

Further, the conveying device comprises a driving device and a conveying part which is driven by the driving device to circularly pass through the furnace body.

Still further, the conveying member may be selected from any one of a group consisting of a conveying net chain, a conveying belt, and a conveying roller.

Furthermore, the light injection area comprises an upper light source module and a lower auxiliary temperature control module, the shells of the upper light source module and the lower auxiliary temperature control module can be mutually covered, and the battery piece can pass through the middle of the upper light source module and the lower auxiliary temperature control module in a transportation mode.

Furthermore, the upper light source module comprises at least one light source element, the lower auxiliary temperature control module comprises a shell positioned below the battery piece, and a heating element is arranged in the shell. The heating cavity can be heated or cooled for adjustment by arranging the lower auxiliary temperature control module, so that the requirement on the process curve required by processing the battery piece is met.

Drawings

FIG. 1 is a side view of an all-in-one machine in accordance with an embodiment of the present invention;

FIG. 2 is a perspective view of an all-in-one machine in an embodiment of the utility model;

FIG. 3 is a perspective view of the multi-function region, light injection region and cooling region in one embodiment of the present invention;

FIG. 4 is a side view of the multi-function region, light injection region and cooling region in one embodiment of the present invention;

fig. 5 is a perspective view of a drying section in an embodiment of the present invention.

In the figure:

1. a drying zone; 11. a first exhaust gas treatment unit; 111. a first exhaust treatment tank; 12. an auxiliary heating device; 2. a sintering zone; 21. an upper heating chamber housing; 22. a lower heating chamber housing; 23. a sintering zone cooling section; 3. a multifunctional zone; 31. a cooling section; 311. a cooling part upper cover body; 312. a cooling portion lower case; 313. a hot air discharge pipe; 32. a heating section; 321. an upper heating chamber; 322. a lower heating chamber; 4. a light injection region; 5. a cooling zone; 6. a transmission device; 61. a conveying member; 62. and (6) conveying rollers.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the present invention more comprehensible to those skilled in the art, and will thus provide a clear and concise definition of the scope of the present invention.

Referring to fig. 1 and 2, as an embodiment of the novel solar cell sintering and light injection integrated machine of the utility model, the solar cell sintering and light injection integrated machine comprises a furnace body and a conveying device 6, wherein a working area of the furnace body comprises a drying area 1, a sintering area 2, a multifunctional area 3, a light injection area 4 and a cooling area 5 which are arranged in sequence. The furnace body is arranged along the conveying direction of the battery piece. The transmission device 6 is used for inputting the battery pieces, sequentially conveying the battery pieces, passing through each working area in the furnace body and then outputting the battery pieces out of the furnace body. Drying zone 1 and sintering zone 2 are used for drying the high temperature sintering to the battery piece, and multifunctional area 3 is used for carrying out rapid cooling, rapid heating's rapid annealing to the battery piece, and light injection zone 4 is used for carrying out passivation treatment to the battery piece after the annealing, promotes its electrical property. In other possible embodiments of the present invention, the furnace body may be two or more arranged in parallel with each other.

In some embodiments of the present invention, the conveying device 6 includes a driving motor and a conveying member 61 that circulates through the furnace body under the driving of the driving motor, and the conveying member 61 is a driving belt that passes through the middle of the furnace body. A head transmission device and a tail transmission device are respectively arranged at two ends of the sintering and polishing integrated machine in the length direction, the head transmission device and the tail transmission device respectively comprise a plurality of conveying rollers 62 (ceramic rollers or quartz rollers or other conveying rollers can be adopted), and a transmission belt sequentially passes through the conveying rollers 62 and realizes the transmission of the solar silicon wafer. The transmission belt is in an annular closed shape, two ends of the transmission chain are respectively sleeved in the machine head transmission device and the machine tail transmission device to realize circular transmission, and the transmission belt can sequentially penetrate through the middle of each working area of the furnace body. In other possible embodiments, the conveying component 61 may also be a conveying network chain, or a plurality of conveying rollers arranged parallel to each other may be provided for conveying the silicon wafers.

Referring to fig. 3 and 4, in one embodiment of the present invention, the multi-functional section 3 includes a cooling part 31 and a heating part 32 which are sequentially disposed along the conveying direction of the battery sheet. The cooling unit 31 is used for cooling the sintered battery piece, and the heating unit 32 is used for heating the sintered battery piece.

The cooling portion 31 includes a cooling portion upper cover 311 and a cooling portion lower casing 312, the cooling portion upper cover 311 and the cooling portion lower casing 312 together form a cooling cavity, and the cooling portion upper cover includes a hot air discharge pipe 313 communicated with the cooling cavity, and hot air in the cooling portion 31 can be quickly discharged by communicating the hot air discharge pipe 31 with a 3 air suction device (such as an air suction pump), thereby realizing an air cooling effect. A water cooling structure (not shown) is further disposed in the upper cover 311 of the cooling portion, the water cooling structure may be any structure in the prior art, and exemplarily, a channel for circulating cold water to pass through may be disposed in the water cooling structure, and a heat sink may be further disposed in the cold water channel to improve a heat dissipation effect. Therefore, the cover body is provided with the water cooling structure, and the battery piece can be cooled rapidly by combining the air cooling mode.

In an embodiment of the present invention, the heating part 32 includes a plurality of heating units, which are sequentially and independently disposed, each heating unit includes an upper heating chamber 321 and a lower heating chamber 322 disposed opposite to each other, and heating elements are disposed in the upper heating chamber 321 and the lower heating chamber 322. The heating element may be selected from at least one of an electromagnetic heating element, an infrared heating element, an ultraviolet heating element, an LED heating element. Taking the heating element as an infrared heating element for illustration, infrared lamp tubes are selected as the infrared heating element, the infrared lamp tubes are respectively disposed on the lower surface of the upper cover plate of the upper heating cavity 321 and the upper surface of the lower cover plate of the lower heating cavity 322, and a gap for passing a transmission network chain or a conveyor belt is disposed between the upper heating cavity 321 and the lower heating cavity 322. When the number of the heating units is two or more, the heating light sources corresponding to different wavelengths can be arranged on each heating unit, so that different processing requirements on the battery piece can be met. It is obvious that the number of heating units can also be provided as only one.

In other possible embodiments of the present invention, the multifunctional region 3 may also be one cooling portion 31 or two cooling portions 31 arranged in series to realize strong cooling of the sintered battery piece. In other possible embodiments of the present invention, the multi-functional zone 3 may be one heating part 32 or two heating parts 32 arranged in series. Therefore, the all-in-one machine provided by the utility model can meet the parameter setting requirements of various processing temperatures and illumination intensities by arranging the multifunctional area 3, so that the efficient processing of the battery pieces with different specifications is realized, the passivation performance of the battery pieces can be improved, and the production efficiency of the battery is improved.

Referring to fig. 5, the drying zone 1 of the present invention includes a heating chamber, a first exhaust gas treatment part 11 is disposed at an inlet close to the drying zone 1, an auxiliary heating device 12 is disposed at an outlet close to the drying zone 1, the auxiliary heating device 12 includes an auxiliary heating housing communicated with the chamber of the drying zone 1, and a heating pipe and a blower are disposed in the auxiliary heating housing. The exhaust gas which is not completely treated by the first exhaust gas treatment section 11 and escapes to the middle of the drying zone 1 is blown to the first exhaust gas treatment section 11 again after passing through the auxiliary heating apparatus 12, so that the organic exhaust gas generated during the drying process can be effectively discharged. First exhaust-gas treatment portion 11 includes first exhaust-gas treatment box 111, still be provided with the cavity that supplies organic waste gas to pass through in first exhaust-gas treatment box 111, be equipped with first oil trap in first exhaust-gas treatment box 111, form between the structure inner wall of first oil trap periphery and first exhaust-gas treatment box 111, top intercommunication at first exhaust-gas treatment box 111 structure has first row of waste pipe, be provided with the burning tower at the top of first row of waste pipe, waste gas discharges after the burning tower combustion processing.

The sintering area 2 comprises an upper heating cavity shell 21 and a lower heating cavity shell 22 which can be detached from each other, the upper heating cavity shell 21 and the lower heating cavity shell 22 can be spliced with each other to form a heating cavity, a conveying part 61 of a conveying device 6 penetrates through the middle part of the heating cavity and extends to the multi-functional area 3, and at least one second waste gas treatment part is further arranged on the upper heating cavity shell 21 and used for rapidly discharging organic matters volatilized in the sintering process of the solar cell slices and improving the electrical performance of the cell slices in the sintering process. In some embodiments of the utility model, the second exhaust gas treatment section comprises three exhaust gas discharge pipes, which may be arranged close to the inlet end, the middle rear end and the outlet end of the sintering zone 2, respectively. A sintering zone cooling section 23 is also provided at the end of the sintering zone 2 of the present invention adjacent to the multi-function zone 3. The sintering zone cooling section 23 may have the same structure as the cooling section 31 of the multi-function zone 3 or may have a structure in which an air cooling unit or a water cooling unit is removed, respectively; the sintering zone cooling section 23 may be any conventional structure capable of cooling the articles in the high-temperature furnace.

In some embodiments of the present invention, the second exhaust treatment portion may adopt the same structure as the first exhaust treatment portion 11.

The light injection region 4 comprises an upper light source module and a lower auxiliary temperature control module, the shells of the upper light source module and the lower auxiliary temperature control module can be mutually covered, and the battery piece is transported through the middle of the upper light source module and the lower auxiliary temperature control module. The upper light source module comprises at least one light source element, the upper light source module comprises a light source module and a power supply module, the lower auxiliary temperature control module comprises a shell positioned below the battery piece, a heating element and a controller connected with the heating element are arranged in the shell, and a temperature sensor connected with the controller, so that the heating temperature can be adjusted according to the temperature condition of the light injection area 4. The lower auxiliary temperature control module can heat or cool the heating cavity to meet the requirement of the required process curve.

The working process of the sintering light injection all-in-one machine of the solar cell comprises the following steps: the printed battery piece enters the drying area 1 under the action of the conveying device 6, and after the battery piece enters the drying area 1, the battery piece is dried at a set temperature at a low temperature, so that organic matters in slurry on the surface of the battery piece are volatilized; the dried battery piece enters a pre-sintering area 2 and is pre-sintered at a set temperature; the presintered battery piece enters a main sintering area 2 and is sintered at a set temperature to form ohmic contact; the battery piece after sintering enters a sintering area cooling part 23 for cooling; the battery piece after the temperature reduction enters the multifunctional area 3, and is subjected to heat treatment or temperature reduction treatment at a set temperature; then the light is transmitted to the light injection region 4 under the action of the transmission device 6, and the cell is irradiated by high light intensity, so that the effect is improved.

Compared with a sintering and light injection split machine, the high-temperature sintering and light injection integrated machine for the solar cell saves the field space, the solar cell enters a multifunctional area for cooling after being dried and sintered, then is heated again, and enters light injection after high-temperature annealing, so that the processing efficiency of the solar cell is obviously improved integrally.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and the present invention is not limited thereto, and any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.

Claims

1. A novel sintering light injection all-in-one machine for solar cells comprises at least one furnace body and is characterized in that,

the working area in the furnace body comprises a drying area, a sintering area, a multifunctional area, a light injection area and a cooling area which are arranged in sequence;

the transmission device is used for inputting and outputting the battery pieces into and out of the furnace body and sequentially conveying the battery pieces through each working area in the furnace body,

the multifunctional region is selected from at least one of a heating part for performing a heating process on the sintered battery piece and a cooling part for performing a cooling process on the sintered battery piece.

2. The novel solar cell sintering light injection all-in-one machine as claimed in claim 1, wherein the heating part comprises at least one heating unit, each heating unit comprises at least one heating cavity, and a heating element is arranged in each heating cavity.

3. The novel solar cell sintering light injection all-in-one machine as claimed in claim 2, wherein the heating element is at least one selected from electromagnetic heating element, infrared heating element, ultraviolet heating element and LED heating element.

4. The novel sintering light injection all-in-one machine for solar cells as claimed in any one of claims 1 to 3, wherein the cooling part comprises a cooling part upper cover body and a cooling part lower shell, the cooling part upper cover body and the cooling part lower shell together form a cooling cavity, the sintering light injection all-in-one machine further comprises a hot air discharge pipe communicated with the cooling cavity, and a water cooling structure is further arranged in the cooling part upper cover body.

5. The novel solar cell sintering and light injecting all-in-one machine as claimed in any one of claims 1 to 3, wherein the drying zone comprises a heating cavity, a first waste gas treatment part is arranged at an inlet close to the drying zone, an auxiliary heating device is arranged at an outlet close to the drying zone, the auxiliary heating device comprises an auxiliary heating shell communicated with the cavity of the drying zone, and a heating element and a blower are arranged in the auxiliary heating shell.

6. The novel solar cell sintering light injection all-in-one machine is characterized in that the sintering area comprises an upper heating cavity shell and a lower heating cavity shell which can be detached from each other, the upper heating cavity shell and the lower heating cavity shell can be spliced with each other to form a heating cavity, the transmission device penetrates through the middle part of the heating cavity and extends to a multi-function area, and at least one second waste gas treatment part is further arranged on the upper heating cavity shell.

7. The novel solar cell sintering light injection all-in-one machine is characterized in that the transmission device comprises a driving device and a conveying part which is driven by the driving device to circulate through the furnace body.

8. The novel solar cell sintering light injection all-in-one machine is characterized in that the conveying component can be selected from any one of a conveying net chain, a conveying belt or a conveying roller.

9. The novel sintering light injection all-in-one machine for solar cells as claimed in claim 1, wherein the light injection region comprises an upper light source module and a lower auxiliary temperature control module, the shells of the upper light source module and the lower auxiliary temperature control module can be mutually covered, and the cell sheet is transported through the middle of the upper light source module and the lower auxiliary temperature control module.

10. The all-in-one sintering light injection machine for solar cells according to claim 9, wherein the upper light source module comprises at least one light source element, the lower auxiliary temperature control module comprises a shell positioned below the cell, and a heating element is arranged in the shell.