Sintering device

Abstract

The utility model relates to the technical field of solar cell sintering equipment, in particular to a sintering device which comprises a furnace body, a conveying belt and a supporting piece. A heating cavity is defined in the furnace body. And the conveying belt is arranged in the heating cavity. The supporting piece is arranged on the conveying belt and provided with a plurality of bearing parts, and the bearing parts are configured to make contact with the area between the two sides of the bottom face of the solar cell so as to support the solar cell on the conveying belt. The supporting part is just in contact with the area between the two sides of the bottom surface of the solar cell, so that hot air can heat the edges of the two sides of the solar cell, the temperature of the edges of the two sides of the solar cell is prevented from being further reduced, and the sintering effect of electrodes near the edges of the two sides of the solar cell is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solar cell sintering equipment, in particular to a sintering device. BACKGROUND

[0002] The sintering device is used in the electrode manufacturing process of a solar cell. When the solar cell is sintered in the sintering device, the middle temperature is relatively high, and the temperatures on both sides are relatively low. In addition, the edges on both sides of the solar cell are in contact with a support, and the temperature at the contact position is even lower, which leads to poor sintering effect of the electrodes near the edges on both sides of the solar cell, and further affects the performance of the solar cell. SUMMARY

[0003] The embodiments of the present application disclose a sintering device, which can improve the sintering effect of the electrodes near the edges on both sides of a solar cell.

[0004] In order to achieve the above-mentioned purpose, the embodiments of the present application disclose a sintering device, which comprises:

[0005] a furnace body, wherein a heating cavity is defined in the furnace body;

[0006] a conveying belt, which is arranged in the heating cavity; and

[0007] a support, which is arranged on the conveying belt, and has a plurality of supporting portions configured to contact the area between the bottom surfaces on both sides of a solar cell to support the solar cell on the conveying belt.

[0008] Optionally, the supporting portion has a circular arc surface configured to contact the area between the bottom surfaces on both sides of the solar cell.

[0009] Optionally, the supporting portion is in a strip shape, and the circular arc surface is arranged at one end of the supporting portion.

[0010] And / or, the shape of the supporting portion is a circular arc shape, a broken line shape or a straight line shape.

[0011] Optionally, the supporting portions are a plurality of supporting portions, and the plurality of supporting portions are arranged in two rows, and the two rows of supporting portions are oppositely arranged.

[0012] In the opposite direction of the two rows of supporting portions, the supporting portions are further configured to have a shortest distance D from the contact position of the solar cell to the edge of the solar cell, and the size of the solar cell is W; wherein D:W = 1:(2-7).

[0013] Optionally, the supports are a plurality of supports, and the plurality of supports are arranged in two rows, and the two rows of supports are oppositely arranged on the conveying belt, and the opposite direction of the two rows of supports intersects with the conveying direction of the conveying belt.

[0014] Optionally, each column of the support members comprises a plurality of the support members, and the plurality of the support members are arranged at intervals along the conveying direction of the conveying belt.

[0015] Optionally, the relative direction of the two columns of the support members is perpendicular to the conveying direction of the conveying belt.

[0016] Optionally, the two columns of the support members are symmetrically arranged.

[0017] Optionally, each of the support members further comprises a leg portion arranged on the conveying belt and protruding from the surface of the conveying belt in a direction away from the conveying belt, and each of the supporting portions is arranged on each of the leg portions.

[0018] Optionally, the leg portion is in the shape of a strip.

[0019] Optionally, the supporting portion is in the shape of a strip, one end of the supporting portion is fixedly connected to the leg portion, and the end of the supporting portion away from the leg portion is configured to contact the area between the two sides of the bottom surface of the solar cell.

[0020] Optionally, the material of the support member is metal or ceramic.

[0021] Optionally, the contact area of each of the support members with the solar cell is less than or equal to 1 mm 2 .

[0022] Optionally, the sintering device further comprises a plurality of heating lamp tubes, the plurality of heating lamp tubes are arranged in the heating cavity, each of the heating lamp tubes is parallel to the surface of the conveying belt, the length direction of the heating lamp tube is perpendicular to the conveying direction of the conveying belt, and the plurality of heating lamp tubes are arranged at intervals along the conveying direction of the conveying belt.

[0023] Optionally, the heating cavity has an inlet and an outlet at two ends respectively, and the two ends of the conveying belt correspond to the inlet and the outlet respectively.

[0024] Compared with the prior art, the sintering device has the beneficial effects that the supporting portion of the support member supports the solar cell on the conveying belt, so that the hot air in the heating cavity can heat the two surfaces of the solar cell, and the solar cell is heated on both sides, and the temperature is more uniform.

[0025] The supporting portion is configured to contact the area between the two sides of the bottom surface of the solar cell, so that the hot air can heat the two side edges of the solar cell, avoid the temperature of the two side edges of the solar cell from being further reduced, and further improve the sintering effect of the electrode near the two side edges of the solar cell. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described below only constitute some of the embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art without creative effort based on these drawings also belong to the protection scope of the present application.

[0027] Figure 1 It is a structural schematic diagram of a sintering device;

[0028] Figure 2 It is a structural schematic diagram of a sintering device disclosed by the embodiments of the present application;

[0029] Figure 3 It is a use state diagram of a sintering device disclosed by the embodiments of the present application;

[0030] Figure 4 It is a structural schematic diagram of a support disclosed by the embodiments of the present application;

[0031] Figure 5 It is a structural schematic diagram of a conveying belt and a support disclosed by the embodiments of the present application;

[0032] Figure 6 It is another structural schematic diagram of a sintering device disclosed by the embodiments of the present application.

[0033] Explanation of reference signs:

[0034] 100, sintering device; 110, furnace body; 111, heating cavity; 112, inlet; 113, outlet; 120, conveying belt; 130, support; 131, supporting part; 132, circular arc surface; 133, supporting leg part; 140, heating lamp; 200, solar cell; 210, bottom surface. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0036] In the present application, the terms "upper", "bottom", "inner", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0037] And, the above-mentioned partial terms, in addition to can be used to express the orientation or positional relationship, can also be used to express other meanings, for example, the term "upper" can also be used to express a certain dependent relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meaning of these terms in this application can be understood according to the specific circumstances.

[0038] In addition, the terms "provided", "provided with", "connected" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0039] In addition, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0040] As Figure 1 As shown in the figure, a sintering device 100, the heating cavity 111 of the sintering device 100 is heated by the heating lamp 140. In the X0-X1 direction, the middle part of the heating lamp 140 is high in temperature, and the two ends are low in temperature, which further causes the temperature in the heating cavity 111 to exist distribution difference. That is, in the X0-X1 direction, the middle part of the heating cavity 111 is high in temperature, and the two sides are low in temperature. The solar cell 200 heated in the heating cavity 111 will also have the problem of low temperature of the two side edges E1 and E2. On the other hand, the solar cell 200 is also supported on the conveying belt 120 by the support 130 to pass through the heating cavity 111 with the conveying belt 120. The support 130 is in contact with the two side edges E1 and E2 of the solar cell 200, but also hinders the edges of the solar cell 200 from contacting the hot air in the heating cavity 111, which further causes the temperature of the two side edges E1 and E2 of the solar cell 200 to be further low, and the electrode near the two side edges E1 and E2 of the solar cell 200 has poor sintering effect. The open-circuit voltage and fill factor performance of the prepared solar cell 200 are poor, and there are many adverse phenomena of edge haze of the solar cell 200, and the yield is reduced.

[0041] Based on the above analysis, the embodiment of the present application provides a sintering device, the supporting part of the sintering device is configured to contact the area between the two sides of the bottom surface of the solar cell. Since the temperature of the two side edges of the solar cell is low when the solar cell is contacted, the supporting part is just in contact with the area between the two sides of the bottom surface of the solar cell, so that the hot air can heat the two side edges of the solar cell, avoiding the temperature of the two side edges of the solar cell from being further reduced, and further improving the sintering effect of the two side edges of the solar cell.

[0042] The technical scheme of the present application will be described below in conjunction with the embodiments and the drawings.

[0043] As shown in Figure 2 and Figure 3 , the embodiment of the present application discloses a sintering device 100, which comprises a furnace body 110, a conveying belt 120 and a support 130. The furnace body 110 defines a heating cavity 111. The conveying belt 120 is arranged in the heating cavity 111. The support 130 is arranged on the conveying belt 120, and the support 130 has a plurality of supporting portions 131 configured to contact an area A between two sides of a bottom surface 210 of a solar cell 200 to support the solar cell 200 on the conveying belt 120.

[0044] It should be noted that the term "area between two sides of the bottom surface 210" refers to any area between two side edges of the bottom surface 210 of the solar cell 200, and the two side edges are E1 and E2 as shown in Figure 3 . Therefore, the "area between two sides of the bottom surface 210" is the A area as shown in Figure 3 . It can be understood that the A area does not include the two side edges E1 and E2 of the bottom surface 210 of the solar cell 200.

[0045] The sintering device 100 supports the solar cell 200 on the conveying belt 120 through the supporting portions 131 of the support 130, so that the hot air in the heating cavity 111 can heat two surfaces of the solar cell 200, and the solar cell 200 is heated on both sides, and the temperature is more uniform.

[0046] For example, the sintering device 100 further comprises a heating lamp 140. Since the middle part of the heating lamp 140 has a high temperature and the two ends have a low temperature in the X0-X1 direction, the middle part of the solar cell 200 has a high temperature and the two sides have a low temperature in the X0-X1 direction when the solar cell 200 is heated. The supporting portions 131 are in contact with the area between the two sides of the bottom surface 210 of the solar cell 200, so that the hot air can better heat the two side edges of the solar cell 200, avoid the temperature of the two side edges of the solar cell 200 from being further reduced, and further improve the sintering effect of the electrode near the two side edges of the solar cell 200.

[0047] Optionally, as shown in Figure 2 , Figure 3 and Figure 5 , the supporting portions 131 are a plurality of supporting portions 131 arranged in two rows, and the two rows of supporting portions 131 are oppositely arranged. The two rows of supporting portions 131 can more stably support the solar cell 200.

[0048] As shown in Figure 3As shown, the supporting part 131 is also configured to have a shortest distance D from the contact position of the solar cell 200 to the edge of the solar cell 200, and the size W of the solar cell 200, which can refer to the length or width of the solar cell 200. If D:W is less than 1:7, the contact position of the supporting part 131 is too close to the edge of the solar cell 200, which can affect the edge heating of the solar cell 200. In addition, the supporting part 131 is preferably in contact with the area between the edge of the solar cell 200 and the center of the solar cell 200, so D:W should not be greater than 1:2. Preferably, D:W = 1:(2-7) includes any point value in the ratio range, for example, 1:2, 1:4 or 1:7.

[0049] Optionally, as shown in Figures 2 to 4 , the shape of the supporting part 131 is a circular arc. As other examples, the shape of the supporting part can also be a polyline or a straight line. These shapes of the supporting part 131 have the advantages of simple structure and good strength. In particular, the circular arc shape of the supporting part 131 has relatively higher structural strength and is not easy to deform.

[0050] Optionally, as shown in Figure 4 , the supporting part 131 has a circular arc surface 132 configured to contact the area between the two sides of the bottom surface 210 of the solar cell 200. The circular arc surface 132 has a smaller contact area with the bottom surface 210 of the solar cell 200, and at the same time, the circular arc surface 132 reduces the probability of scratches or breakage of the solar cell 200 when in contact with the supporting part 131.

[0051] Optionally, as shown in Figure 4 , the supporting part 131 is a strip, and the circular arc surface 132 is arranged at one end of the supporting part 131. The strip-shaped supporting part 131 can contact the solar cell 200 with one end to reduce the contact area with the solar cell 200.

[0052] Further, as shown in Figure 4 , each supporting part 130 is configured to have a contact area with the solar cell 200 ≤1mm 2 . As can be seen, the contact area of the supporting part 130 with the solar cell 200 is small, that is, the area of the solar cell 200 that can be in contact with hot air is larger, and the heating of the solar cell 200 is more uniform.

[0053] In some embodiments, referring back to Figures 2 to 4 , each supporting part 130 further includes a foot part 133 arranged on the conveying belt 120 and protruding the surface of the conveying belt 120 in a direction away from the conveying belt 120, such as Figure 2 and Figure 3The Z0-Z1 direction shown in FIG. 1. Each support portion 131 is arranged on each leg portion 133.

[0054] Optionally, as shown in FIG. 1, the leg portion 133 is in a strip shape. The strip-shaped leg portion 133 is simple in structure, so as to reduce the difficulty of processing and manufacturing. Figures 2 to 4

[0055] Optionally, as shown in FIG. 1, one end of the strip-shaped support portion 131 is fixedly connected to the leg portion 133, and the other end of the support portion 131 away from the leg portion 133 is configured to contact the area between the two sides of the bottom surface of the solar cell 200. Figures 2 to 4

[0056] Optionally, the material of the support 130 is metal or ceramic, for example, stainless steel or titanium alloy, and ceramic, for example, alumina ceramic, silicon carbide ceramic, boron nitride ceramic, etc. Metal and ceramic are resistant to high temperature and have high strength, and can work stably in the heating cavity 111 with the conveying belt 120, and are not prone to deformation and other problems.

[0057] Optionally, as shown in FIG. 1, the support 130 is a plurality of supports 130 arranged in two rows. The two rows of supports 130 are oppositely arranged on the conveying belt 120, and the relative direction of the two rows of supports 130 intersects the conveying direction of the conveying belt 120. Figure 5 Figure 6 Figure 5 In the embodiment shown in FIG. 1, the relative direction of the two rows of supports 130 is the X-axis direction, and the conveying direction of the conveying belt 120 is the Y-axis direction, and the X-axis direction intersects the Y-axis direction. More preferably, each row of supports 130 includes a plurality of supports 130, and the plurality of supports 130 are arranged at intervals along the conveying direction of the conveying belt 120. More preferably, the relative direction of the two rows of supports 130 is perpendicular to the conveying direction of the conveying belt 120.

[0058] The two rows of supports 130 respectively support the two sides of the bottom surface of the solar cell 200, so that the solar cell 200 is conveyed more stably on the conveying belt 120. And the two rows of supports 130 can support a plurality of solar cells 200, so that the plurality of solar cells 200 is conveyed in the heating cavity 111 with the conveying belt 120. Specifically, after placing a piece of solar cell 200 on the two rows of supports 130, the conveying belt 120 is conveyed forward by a certain distance, and then the next piece of solar cell 200 is placed on the two rows of supports 130, so as to improve the sintering efficiency of the solar cell 200.

[0059] Optionally, as shown in FIG. 1, the two rows of supports 130 are symmetrically arranged to more stably support the solar cell 200. Figure 5

[0060] Optionally, as shown in FIG. 1, the two rows of supports 130 are symmetrically arranged to more stably support the solar cell 200. Figure 6 ​​​​​As shown, there are multiple heating lamps 140, which are arranged within the heating cavity 111. Each heating lamp 140 is parallel to the surface of the conveyor belt 120, and its length direction is perpendicular to the conveying direction of the conveyor belt 120. The multiple heating lamps 140 are spaced apart along the conveying direction of the conveyor belt 120, as shown in the figure. Figure 6 The Y0-Y1 direction is shown in the diagram. When the multiple heating lamps 140 are energized, they create a relatively uniform heating environment within the heating cavity 111, so that the multiple solar cells 200 are heated evenly.

[0061] Optionally, such as Figure 6 As shown, the heating cavity 111 has an inlet 112 and an outlet 113 at its two ends, and the two ends of the conveyor belt 120 correspond to the inlet 112 and the outlet 113, respectively. The conveyor belt 120 is used to input the solar cell 200 outside the heating cavity 111 into the heating cavity 111 from the inlet 112. After the solar cell 200 passes through the heating cavity 111 with the conveyor belt 120, it is output from the outlet 113, thus completing the sintering process.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A sintering apparatus characterized by comprising: The application relates to a sintering device for solar cells. The sintering device comprises: a furnace body, wherein a heating cavity is defined in the furnace body; a conveying belt arranged in the heating cavity; and a support arranged on the conveying belt, wherein the support has a plurality of supporting portions configured to contact the area between the two sides of the bottom surface of the solar cell to support the solar cell on the conveying belt.

2. The sintering apparatus according to claim 1, characterized by The supporting portion has a circular arc surface configured to contact the area between the two sides of the bottom surface of the solar cell.

3. The sintering apparatus according to claim 2, characterized by The supporting portion is in a strip shape, and the circular arc surface is arranged at one end of the supporting portion. The supporting portion is in a circular arc shape, a broken line shape or a straight line shape.

4. The sintering apparatus according to claim 1, wherein The plurality of supporting portions are arranged in two rows, and the two rows of supporting portions are oppositely arranged. In the opposite direction of the two rows of supporting portions, the shortest distance between the contact position of the solar cell and the edge of the solar cell is D, and the size of the solar cell is W; wherein D: W = 1: (2-7).

5. The sintering apparatus according to claim 1, wherein The plurality of supports are arranged in two rows, and the two rows of supports are oppositely arranged on the conveying belt, and the opposite direction of the two rows of supports intersects with the conveying direction of the conveying belt.

6. The sintering apparatus according to claim 5, wherein Each row of supports comprises a plurality of supports, and the plurality of supports are arranged at intervals along the conveying direction of the conveying belt. The opposite direction of the two rows of supports is perpendicular to the conveying direction of the conveying belt. The two rows of supports are symmetrically arranged.

7. The sintering apparatus according to claim 1, wherein Each support further comprises a supporting leg portion arranged on the conveying belt and protruding from the surface of the conveying belt in a direction away from the conveying belt, and each supporting portion is arranged on each supporting leg portion.

8. The sintering apparatus according to claim 7, wherein The supporting leg portion is in a strip shape. The supporting portion is in a strip shape, one end of the supporting portion is fixedly connected to the supporting leg portion, and the end of the supporting portion away from the supporting leg portion is configured to contact the area between the two sides of the bottom surface of the solar cell.

9. The sintering apparatus according to any one of claims 1 to 8, characterized by The material of the support is metal or ceramic. and / or each of the support members is configured to have a contact area with the solar cell of < 1 mm 2 .

10. The sintering apparatus according to any one of claims 1 to 8, characterized by The sintering device further comprises a plurality of heating lamp tubes arranged in the heating cavity, each heating lamp tube is parallel to the surface of the conveying belt, the length direction of the heating lamp tube is perpendicular to the conveying direction of the conveying belt, and the plurality of heating lamp tubes are arranged at intervals along the conveying direction of the conveying belt. The heating cavity has an inlet and an outlet at two ends respectively, and the two ends of the conveying belt correspond to the inlet and the outlet respectively.

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