TWI725895B - Horizontal single-sided or double-sided simultaneous plating equipment to increase the plating area of solar cells - Google Patents

Abstract

The invention discloses a horizontal single-sided or double-sided simultaneous coating area for increasing the plating area of solar cells. The electroplating equipment includes an anode group (10) and a cathode group (20) alternately arranged, the anode group (10) between the two groups of the cathode group (20) is at least one group, the anode group (10) and the cathode group ( A water-blocking roller set (30) is arranged between 20). The water-blocking roller set (30) includes two super absorbent material rollers (31) arranged up and down. The anode group (10) is connected to the medicine supply barrel. The cathode group (20) includes two conductive cathode rollers (21) arranged up and down, and the anode group (10) has an amplification part for increasing the plating area of the solar cell. The invention can shorten the manufacturing length of the equipment, reduce the cost, plate the required thickness of the plating layer in a shorter time, and improve the plating efficiency.

Description

Horizontal single-sided or double-sided simultaneous plating equipment to increase the plating area of solar cells

The invention belongs to a horizontal single-sided or double-sided simultaneous electroplating equipment for increasing the plating area of solar cells.

With the expansion and rapid development of the photovoltaic industry, as well as policy adjustments, the market has become more and more stringent on the price of solar energy. Many processes are reducing complexity and using materials that are easy to obtain for use.

Existing solar cells use printed silver paste, which accounts for more than 25% of the total cost of producing solar cells. Obviously, the use of inexpensive metals to replace part or all of the silver paste is of great significance in reducing the production cost of crystalline silicon solar cells. .

Using metallic copper is a good way to replace expensive silver paste. However, at high temperatures, copper ions are easily diffused into crystalline silicon, resulting in a decrease in the lifetime of crystalline silicon, which reduces the photoelectric conversion efficiency of crystalline silicon solar cells, and can deposit metallic copper on crystalline silicon solar cells under low temperature conditions. On top, the electrodes of crystalline silicon solar cells are generated.

In the production process of crystalline silicon solar cells, there are two methods to deposit metal copper on the surface of crystalline silicon solar cells under low temperature conditions to generate crystalline silicon solar cell electrodes: low-temperature physical or chemical metal deposition methods. The low-temperature physical metal deposition method uses sputtering and other means. Low temperature The disadvantage of the physical metal deposition method is that it cannot implement selective metal deposition, mask technology must be used, and expensive equipment needs to be purchased, which increases production costs and deviates from the starting point of cost reduction.

The method used for chemical deposition of metal is an electroplating process. Compared with the process of physically depositing metal, the electroplating process not only has a simple process, but also has the advantage of being able to deposit metal selectively. Therefore, the production cost of the electroplating process can be controlled very low, which can greatly reduce the cost of producing crystalline silicon solar cells. Therefore, the use of electroplating processes to deposit metals on crystalline silicon solar cells is currently a very active area of technology research and development.

However, the problems encountered in actual electroplating are that the plating time is relatively small, and the same thickness of electroplating will cause the electroplating time to be prolonged, and the electroplating equipment will also become relatively long. Therefore, during electroplating, the area to be plated is small and the electroplating time is long, which is not conducive to efficient production, and the equipment manufacturing cost will be relatively increased.

In order to overcome the above shortcomings, the purpose of the present invention is to provide a horizontal single-sided or double-sided simultaneous electroplating equipment that can shorten the manufacturing length of the equipment, reduce the cost, and plate the required plating thickness in a shorter time to increase the plating area of the solar cell.

In order to achieve the above objectives, the technical solution adopted by the present invention is: a horizontal single-sided or double-sided simultaneous electroplating equipment for increasing the plating area of solar cells, including alternately arranged anode groups and cathode groups, and two sets of cathode groups between the two groups. The anode group is at least one group. A water blocking roller group is arranged between the anode group and the cathode group. The water blocking roller group includes two super absorbent material rollers arranged up and down. The anode group is connected to the liquid medicine supply barrel. The cathode group includes two conductive cathode rollers arranged up and down, and the anode group has an amplification part for increasing the plating area of the solar cell.

The beneficial effect of the horizontal single-sided or double-sided simultaneous electroplating equipment for increasing the plating area of solar cells is that by setting the amplification part, the manufacturing length of the equipment can be shortened, the cost is reduced, and the required plating layer can be plated in a shorter time. thickness.

Preferably, the anode set includes an upper potion box, a lower potion box, and an insoluble anode net. The top of the upper potion box and the bottom of the lower potion box are provided with potion inlets for connecting the potion supply barrel, and the insoluble anode net is set on the upper potion box. In the lower medicine water box, the amplification part is an amplification surface covering the internal cavity of the upper medicine water box, and the amplification surface is located under the insoluble anode net in the upper medicine water box. The upper potion enters the potion box from the potion box, passes through the insoluble anode net in the potion box, and the expansion surface is used to diffuse the potion that has passed through the insoluble anode net around, so that it covers the entire inside of the potion box The cavity allows the electroplating liquid to be evenly diffused, while the lower liquid pouring upwards from the bottom of the lower liquid box, so that the upper and lower end faces of the solar cell are plated on a large area.

Preferably, the amplification surface adopts a flexible sponge, and a mesh surface is arranged under the flexible sponge, and the mesh surface is arranged in the upper liquid medicine box, and the flexible sponge is located between the mesh surface and the insoluble anode net in the upper liquid medicine box. The flexible sponge is used as the amplification surface, the structure is simple, and the effect of diffusion to the surrounding is better, which can better control the flow rate, make the flow hole smaller, and be more conducive to control; the setting of the mesh surface is used to fix the flexible sponge on the Below the insoluble anode net in the potion box. In order to facilitate the later replacement, the net surface can be arranged in a detachable structure with the upper potion box, such as snap connection, bolt connection, etc.

Preferably, the end surface of the upper medicine box facing the lower medicine box is provided with a hollow, which can further control the flow rate of the medicine.

Preferably, the super absorbent material roller is higher than the surface of the upper liquid medicine box. It can prevent the solar cell from hitting the potion box.

Preferably, the anode group includes upper and lower corresponding insoluble conductive anode rollers, the insoluble conductive anode roller is hollow and has potion holes distributed, the potion supply barrel is connected with the insoluble conductive anode roller; the upper and lower corresponding insoluble conductive anode rollers are formed A conductive anode group, the conductive anode group is provided with at least two groups, and at least two groups of the conductive anode group form the amplification part. The amplification part is formed by two or more conductive anode groups, the structure is simple, and only a few more conductive anode groups need to be added.

Preferably, a sponge is provided outside the insoluble conductive anode roller. Used to diffuse the electroplating potion.

Preferably, the distance between the central axes of the conductive cathode rollers located on both sides of the anode group is less than the electroplating length of the solar cell sheet.

As a further improvement of the present invention, due to electroplating, the potion is likely to overflow on the subsequent rollers, and then as the number of electroplating increases, the diameter of the rollers will increase accordingly, which is not conducive to mass production. Then, at least one end of the super absorbent material roller of the present invention is connected to a vacuum suction nozzle through a vacuum suction nozzle joint. The electroplating solution (electroplating solution) can be sucked out immediately, and mass production can be ensured.

Preferably, a hot air knife is arranged between the water blocking roller group and the cathode group. It can effectively keep the cathode dry.

Preferably, the distance between the surface of the solar cell sheet and the electrodes of the anode group ranges from 1 mm to 100 mm. If the electrode of the anode group is an insoluble anode net, the distance between the surface of the solar cell and the insoluble anode net is in the range of 1mm-100mm; if the electrode of the anode group is an insoluble conductive anode roller, the surface of the solar cell is conductive to the insoluble anode. The distance between anode rollers ranges from 1mm-100mm.

10: Anode group

11: Upper potion box

12: Drop the potion box

13: Potion import

14: Insoluble anode net

15: Flexible sponge

16: Mesh

17: hollow

18: Insoluble conductive anode roller

19: Sponge

20: Cathode group

21: Conductive cathode roller

30: Water blocking roller set

31: Super absorbent material roller

40: Vacuum nozzle connector

50: Solar cell

Figure 1 is a perspective view of the first embodiment; Figure 2 is a top view of the first embodiment; Figure 3 is an exploded view of the first angle of the anode group and the amplification part in the first embodiment; Figure 4 is the first embodiment of the anode group and Fig. 5 is a perspective view of the second embodiment; Fig. 6 is a top view of the second embodiment; Fig. 7 is a perspective view of the anode group and the amplifying part in the second embodiment.

The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so that the protection scope of the present invention can be more clearly defined.

Example one

Referring to Figures 1-4, a horizontal single-sided or double-sided simultaneous electroplating equipment for increasing the plating area of solar cells in this embodiment includes an anode group 10, a cathode group 20, and two groups of cathode groups 20 arranged alternately. The anode group 10 is at least one group. A water blocking roller group 30 is arranged between the anode group 10 and the cathode group 20. The water blocking roller group 30 includes two super absorbent material rollers 31 arranged up and down. The material of 31 can be made of water-blocking sponge. The anode group 10 is connected to the potion supply tank. Each group of cathode group 20 includes two conductive cathode rollers 21 arranged up and down. The anode group 10 has an expansion to increase the plating area of solar cells. unit.

The anode group 10 in this embodiment includes an upper potion box 11, a bottom potion box 12, and an insoluble anode net 14. The top of the top potion box 11 and the bottom of the bottom potion box 12 are provided with potion inlet 13 for connecting the potion supply barrel, and the insoluble anode The net 14 is arranged in the upper medicine water box 11 and the lower medicine water box 12, the amplification part is an amplification surface covering the inner cavity of the upper medicine water box 11, and the amplification surface is located below the insoluble anode net 14 in the upper medicine water box 11. More specifically, the amplification surface of this embodiment adopts a flexible sponge 15, and a mesh surface 16 is provided under the flexible sponge 15, and the mesh surface 16 is set in the upper potion box 11, and the flexible sponge 15 is located between the mesh surface 16 and the upper potion box. 11 within the insoluble anode net 14 between.

Wherein, the end surface of the upper medicine water box 11 facing the lower medicine water box 12 is provided with a hollow 17 to better control the flow rate of the medicine water. The super absorbent material roller 31 is higher than the surface of the upper potion box 11, which can prevent the solar cell sheet 50 from hitting the potion box.

At least one end of the super absorbent material roller 31 is connected to the vacuum nozzle through the vacuum nozzle connector 40, so that the electroplating solution (electroplating solution) can be sucked out immediately without affecting the subsequent rollers, and mass production can be ensured. A hot air knife can also be arranged between the water blocking roller group 30 and the cathode group 20.

This embodiment does not require a dry cathode with a deplating design; because the vacuum nozzle connector 40, the water blocking roller group 30 and the hot air knife structure are configured, the electroplating solution can be effectively blocked from the anode group 10, so the cathode group can be effectively maintained 20 dry.

The distance between the surface of the solar cell sheet 50 and the insoluble anode mesh 14 ranges from 1 mm to 100 mm.

The working principle of the first embodiment is: the solar cell 50 (silicon wafer) drives the transmission gear under the action of the driving gear driven by the motor, thereby driving all the rollers. The solar cell 50 first comes to the two conductive elements under the action of the guiding rollers. Between the cathode rollers 21, it enters the first water-blocking roller group 30, and then to the anode group 10. At this time, the electroplating potion on the upper end is sprinkled (the potion enters from the upper potion box 11, enters the box, and passes through the insoluble anode net 14. Then it flows out from the hollow 17 of the upper potion box 11, and then passes through the flexible sponge 15 as the amplification surface, and then flows onto the solar cell 50, and continues to move forward to the second water-blocking roller group 30, blocking The water roller set 30 sucks out excess potion through the vacuum suction nozzles at one end/both ends to keep the solar cell 50 dry, and then keeps looping), and there is electroplating potion gushing out at the bottom (the potion enters from the bottom of the potion box 12 and enters the potion box. In the tank 12, the insoluble anode net 14 in the lower potion box 12 is passed, and finally it touches the solar cell 50, and then keeps looping). At this time, there is an anode in the potion, the circuit is connected, and the solar cell 50 starts to contact the solar cell 50. Electroplating up and down, the solar cell 50 continues to move forward, enters the next water blocking roller group 30, continues to move forward, enters the cathode group 20, continues to move forward and leaves the previous cathode group 20, and then enters the next water blocking roller group 30, Then enter the anode group 10, continue to move forward, leave the last anode group 10, reciprocating, and finally run out to the solar cell 50, flow to the film outlet, and complete the electroplating (when the solar cell 50 is electroplated again, there is no light, and the light is blocked. Environment).

Example two

Referring to FIGS. 5-7, the difference from the first embodiment is that the structure of the anode group 10 and the amplification part are different. The anode group 10 in this embodiment includes insoluble conductive anode rollers corresponding to each other up and down. The insoluble conductive anode roller 18 is hollow and is provided with syrup holes. The syrup supply barrel is in communication with the insoluble conductive anode roller 18, and the insoluble conductive anode roller 18 is externally arranged There is a sponge 19; the upper and lower corresponding insoluble conductive anode rollers 18 form a conductive anode group, the conductive anode group is provided with at least two groups, and at least two groups of conductive anode groups form an amplification part. In addition, the distance between the central axes of the conductive cathode rollers 21 located on both sides of the anode group 10 is less than the electroplating length of the solar cell sheet 50. The distance between the surface of the solar cell sheet 50 and the insoluble conductive anode roller 18 ranges from 1 mm to 100 mm.

The working principle of the second embodiment is: the solar cell 50 (silicon wafer) drives the transmission gear under the action of the motor to drive the belt and the belt drive gear, thereby driving all the rollers. The solar cell 50 comes first under the action of the guiding rollers. Between the two conductive cathode rollers 21, they enter the first water-blocking roller group 30 and come to the anode group 10. Taking the anode group 10 as an example with two conductive anode groups, the solar cell 50 first passes through the first conductive anode group. Group, and then through the second conductive anode group, where the upper electroplating liquid is sprinkled (the liquid enters from the insoluble conductive anode roller 18 above, flows out from the liquid hole, passes through the sponge 19, and then contacts the solar cell 50, and then Circling all the way), the electroplating potion gushes out from the bottom end (the potion enters from the insoluble conductive anode roller 18 below, flows out from the potion hole, passes through the sponge 19, and then contacts the solar cell 50, and continues to move forward to the water blocking roller group 30 At this point, the water-blocking roller set 30 sucks out the excess medicine through the vacuum nozzles at one end/two ends to keep the solar cell 50 dry, and then keeps looping). At this time, there is an anode in the medicine, the circuit is connected, and the solar cell is connected. 50 is electroplated up and down, the solar cell 50 continues to move forward, enters the next water-blocking roller group 30, keeps going forward, enters the cathode group 20, continues to move forward and leaves the previous cathode group 20, and then enters the next water-blocking roller group 30 , Then enter the anode group 10, continue to move forward, leave the last anode group 10, reciprocating, and finally run out to the solar cell 50, flow to the film outlet, and complete the electroplating (when the solar cell 50 is electroplated again, there is no light. Carried out under shading environment).

The above embodiments are only to illustrate the technical ideas and features of the present invention, and their purpose is to let people familiar with the technology understand the content of the present invention and implement them, and cannot limit the scope of protection of the present invention. All equivalent changes or modifications should be covered by the protection scope of the present invention.

13: Potion import

14: Insoluble anode net

15: Flexible sponge

16: Mesh

17: hollow

31: Super absorbent material roller

40: Vacuum nozzle connector

Claims (11)

A horizontal single-sided or double-sided simultaneous electroplating equipment for increasing the plating area of solar cells, comprising alternately arranged anode groups (10) and cathode groups (20), two anode groups (10) between the cathode groups (20) ) Is at least one group, a water blocking roller group (30) is arranged between the anode group (10) and the cathode group (20), and the water blocking roller group (30) includes two super absorbent material rollers ( 31), the anode group (10) is connected to the liquid medicine supply tank, and each group of the cathode group (20) includes two conductive cathode rollers (21) arranged up and down, characterized in that: the anode group (10) has a function for increasing Amplification of the plated area of the solar cell. The horizontal single-sided or double-sided simultaneous electroplating equipment for increasing the plating area of solar cells as described in claim 1, wherein the anode group (10) includes an upper chemical water box (11), a lower chemical water box (12), and an insoluble anode A net (14), the top of the upper potion box (11) and the bottom of the lower potion box (12) are provided with potion inlets (13) for connecting the potion supply barrel, and the insoluble anode net (14) is set on the upper potion box (11) ) And the lower medicine box (12), the amplification part is the amplification surface covering the inner cavity of the upper medicine box (11), and the amplification surface is located on the insoluble anode net (14) in the upper medicine box (11) Below. The horizontal single-sided or double-sided simultaneous electroplating equipment for increasing the plating area of solar cells as described in claim 2, wherein the amplification surface adopts a flexible sponge (15), and a mesh surface is arranged below the flexible sponge (15) (16) The mesh surface (16) is arranged in the upper liquid medicine box (11), and the flexible sponge (15) is located between the mesh surface (16) and the insoluble anode mesh (14) in the upper liquid medicine box (11). The horizontal single-sided or double-sided simultaneous electroplating equipment for increasing the plating area of solar cells according to claim 2, wherein the upper potion box (11) facing the lower potion box (12) is provided with a hollow (17) on the end surface. The horizontal single-sided or double-sided simultaneous electroplating equipment for increasing the plating area of solar cells as described in claim 2, wherein the super absorbent material roller (31) is higher than the surface of the upper potion box (11). The horizontal single-sided or double-sided simultaneous electroplating equipment for increasing the plating area of solar cells according to claim 1, wherein the anode group (10) includes insoluble conductive anode rollers (18) corresponding to the upper and lower sides, and the insoluble conductive anode roller (18) Hollow and distributed with potion holes, the potion supply barrel is connected with the insoluble conductive anode roller (18); the upper and lower corresponding insoluble conductive anode rollers (18) form a conductive anode group, and the conductive anode group is provided with at least Two groups, at least two groups of the conductive anode groups form the amplification part. The horizontal single-sided or double-sided simultaneous plating equipment for increasing the plating area of solar cells as described in claim 6, wherein the insoluble conductive anode roller (18) is provided with a sponge (19) outside. The horizontal single-sided or double-sided simultaneous plating equipment for increasing the plating area of solar cells as described in claim 6, wherein the distance between the central axis of the conductive cathode rollers (21) located on both sides of the anode group (10) It is less than the electroplating length of the solar cell (50). The horizontal single-sided or double-sided simultaneous electroplating equipment for increasing the plating area of solar cells as described in claim 1, wherein at least one end of the super absorbent material roller (31) is connected to a vacuum suction nozzle through a vacuum nozzle connector (40). mouth. The horizontal single-sided or double-sided simultaneous electroplating equipment for increasing the plating area of solar cells as described in claim 1, wherein a hot air knife is arranged between the water blocking roller group (30) and the cathode group (20). The horizontal single-sided or double-sided simultaneous electroplating equipment for increasing the plating area of solar cells as described in claim 1, wherein the distance between the surface of the solar cell (50) and the electrodes of the anode group (10) is in the range 1mm-100mm.

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