A high support point furnace with ejector pin for improving sintering

Abstract

The present invention discloses a high-support point furnace belt ejector for improving sintering, including a sintering furnace mesh belt, the inclined surfaces of the left oblique needle section and the right oblique needle section are both provided with grooves, a plurality of mounting rods are sequentially inserted into the grooves, a fixed sphere is connected to the mounting rod, a spherical sleeve is rotatably provided on the fixed sphere, and the spherical surface of the spherical sleeve is in the same plane as the inclined surface of the left oblique needle section or the right oblique needle section. The present invention provides a spherical sleeve on the inclined section of the ejector, so that when the battery cell enters the sintering furnace from the printing section, the ejector can pass through the ejector inclined surface that can rotate 360° without dead angles through the spherical sleeve on the ejector, which can greatly reduce the sliding friction between the battery cell and the ejector, and during the operation of the sintering furnace mesh belt in the furnace chamber, it can offset or reduce the fluctuation and extrusion in multiple angles, thereby reducing the probability of battery cell edge collapse, hidden cracks, and fragments.

Description

Technical Field

[0001] The invention relates to the technical field of ejector pins for photovoltaic module sintering, in particular to a high-supporting-point furnace belt ejector pin for improving sintering. Background Art

[0002] Currently, in the screen printing process of the photovoltaic industry, a sintering furnace is used to sinter the printed solar cells. The sintering furnace belts of the screen printing process are basically of the same type, that is, the solar cells are directly supported from both sides by ejectors. This support method can minimize the contact area between the furnace belt and the solar cells, and avoid aluminum back field defects after sintering due to the ejector pins of the furnace belt contacting the aluminum back field of the solar cell.

[0003] However, there are still some unavoidable problems with the sintering furnace mesh belt currently in use, which are as follows: 1. When the battery cell enters the sintering furnace from the printing section, sliding friction between the edge of the battery cell and the furnace belt ejector pin will inevitably occur. Since the furnace belt is only in a relatively stable state during the operation process in the furnace chamber, it will continue to produce bumps during the actual operation process, and the bumps will cause shaking from all angles and directions, such as fluctuations along the movement direction of the sintering furnace mesh belt and fluctuations in the opposite directions of the left and right ejectors. Any further fluctuations and extrusions may cause the battery cell to collapse, crack, fragment (including grade D) and other defects; 2. Due to the wear of the battery cell, when the furnace belt ejector pin is worn to a certain extent, the wear surface will contact the aluminum back field, resulting in ejector prints on all battery cells passing through the ejector pin. At this time, the sintering furnace belt will have to be replaced as a whole. Replacing the entire ejector pin as a part of the ejector pin area is a great waste of resources. Summary of the invention

[0004] The object of the present invention is to provide a high support point furnace with ejector pins for improving sintering, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A high-support-point furnace belt ejector for improving sintering comprises a sintering furnace mesh belt, on which a plurality of mesh belt ejector groups are sequentially arranged at intervals, the mesh belt ejector group comprising a left ejector unit and a right ejector unit, the left ejector unit comprising a left vertical needle segment and a left oblique needle segment fixedly connected, the right ejector unit comprising a right vertical needle segment and a right oblique needle segment fixedly connected, the oblique surfaces of the left oblique needle segment and the right oblique needle segment are both provided with grooves, in which a plurality of mounting rods are sequentially inserted, a fixed sphere is connected to the mounting rod, a spherical sleeve is rotatably provided with a concentrically arranged spherical sleeve, and the spherical surface of the spherical sleeve is in the same plane as the oblique surface of the left oblique needle segment or the right oblique needle segment.

[0007] Preferably, the left vertical needle segment and the left oblique needle segment are an integrally formed structure, and the right vertical needle segment and the right oblique needle segment are an integrally formed structure.

[0008] Preferably, the mounting rod on the left oblique needle segment or the right oblique needle segment is respectively perpendicular to the inclined surface of the corresponding left oblique needle segment or the right oblique needle segment, and the extension line of the mounting rod is located at the center of the fixed sphere and the sphere sleeve, and the spherical surface of the sphere sleeve farthest from the mounting rod is located on the inclined surface of the left oblique needle segment or the right oblique needle segment.

[0009] Preferably, the area of ​​the fixed sphere covered by the spherical sleeve is greater than one half of the surface area of ​​the fixed sphere and less than two thirds of the surface area of ​​the fixed sphere.

[0010] Preferably, a connecting rod is fixedly inserted on the side wall of the groove, the connecting rod is arranged between a plurality of ball sleeves, and a roller is rotatably sleeved on the connecting rod.

[0011] Preferably, the distance between the left ejector unit and the right ejector unit is set to 75 mm, the height of the left ejector unit is set to 11 mm, the width is set to 55.5 mm, and the height of the right ejector unit is set to 11 mm, the width is set to 56.5 mm.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The present invention provides a spherical sleeve on the inclined section of the ejector pin, so that when the battery cell enters the sintering furnace from the printing section, the spherical sleeve on the ejector pin can rotate 360 ​​degrees without dead angles on the ejector pin inclined surface, which can greatly reduce the sliding friction between the battery cell and the ejector pin. In addition, during the operation of the sintering furnace mesh belt in the furnace cavity, the fluctuation and extrusion in multiple angles can be offset or reduced, thereby reducing the probability of edge collapse, hidden cracks, and fragmentation of the battery cell.

[0014] The present invention provides a spherical sleeve so that when the battery cell contacts the inclined surface of the ejector pin, the spherical sleeve can be rotated to transfer the battery cell and support sintering. Therefore, under the wear effect caused by the battery cell, the battery cell will cause wear to the contacting spherical sleeve. Once the spherical sleeve is worn to a serious extent, it only needs to be replaced and installed, and there is no need to replace the entire ejector pin, which greatly reduces the waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the mesh belt ejector assembly of the present invention;

[0016] Figure 2 It is a schematic diagram of the ball sleeve connection structure of the present invention;

[0017] Figure 3 A schematic diagram of the structure of a mesh belt ejector assembly provided on a mesh belt of a sintering furnace of the present invention;

[0018] Figure 4 A schematic diagram of the structure of a roller provided with the mesh belt ejector assembly of the present invention;

[0019] Figure 5 It is a schematic diagram of the inclined surface structure of the left oblique needle segment of the present invention.

[0020] In the figure: 1 left vertical needle segment, 2 left oblique needle segment, 3 right vertical needle segment, 4 right oblique needle segment, 5 groove, 6 mounting rod, 7 fixed sphere, 8 sphere sleeve, 9 connecting rod, 10 roller, 100 sintering furnace mesh belt, 200 battery cell. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-5 , the present invention provides a technical solution:

[0023] A high-support-point furnace belt ejector for improving sintering, comprising a sintering furnace mesh belt 100, on which a plurality of mesh belt ejector groups are sequentially arranged at intervals, the mesh belt ejector group comprising a left ejector unit and a right ejector unit, the left ejector unit comprising a left vertical needle segment 1 and a left oblique needle segment 2 fixedly connected, the left vertical needle segment 1 and the left oblique needle segment 2 being an integrally formed structure, the right ejector unit comprising a right vertical needle segment 3 and a right oblique needle segment 4 fixedly connected, the right vertical needle segment 3 and the right oblique needle segment 4 being an integrally formed structure, grooves 5 are provided on the inclined surfaces of the left oblique needle segment 2 and the right oblique needle segment 4, a plurality of mounting rods 6 are sequentially inserted into the grooves 5, the mounting rods 6 on the left oblique needle segment 2 are connected to the left oblique needle segment 2 The inclined surfaces are perpendicular to each other, the mounting rod 6 on the right inclined needle segment 4 is perpendicular to the inclined surface of the right inclined needle segment 4, the extension line of the mounting rod 6 is at the center of the fixed sphere 7 and the sphere sleeve 8, the mounting rod 6 is connected to the fixed sphere 7, and the fixed sphere 7 is rotatably sleeved with a concentrically arranged sphere sleeve 8, the spherical surface of the sphere sleeve 8 and the inclined surface of the left inclined needle segment 2 or the right inclined needle segment 4 are in the same plane, and the spherical surface of the sphere sleeve 8 farthest from the mounting rod 6 is on the inclined surface of the left inclined needle segment 2 or the right inclined needle segment 4, that is, to ensure that when the battery cell 200 contacts the inclined needle segment of the mesh belt ejector group, it can contact the sphere sleeve 8, so that the sphere sleeve 8 can reduce friction and resist wear.

[0024] Moreover, the area of ​​the fixed sphere 7 covered by the spherical sleeve 8 is greater than half of the surface area of ​​the fixed sphere 7 and less than two-thirds of the surface area of ​​the fixed sphere 7. The area of ​​the fixed sphere 7 covered by the spherical sleeve 8 is greater than half of the surface area of ​​the fixed sphere 7 to ensure that the spherical sleeve 8 will not fall off the fixed sphere 7 during the rotation process. Moreover, the area of ​​the fixed sphere 7 covered by the spherical sleeve 8 is less than two-thirds of the surface area of ​​the fixed sphere 7 to ensure that the spherical sleeve 8 can achieve the necessary angle of rotation and increase the amplitude of rotation.

[0025] As a preference, a connecting rod 9 is fixedly inserted on the side wall of the groove 5, the connecting rod 9 is arranged between a plurality of ball sleeves 8, and a roller 10 is rotatably sleeved on the connecting rod 9, and the roller 10 can reduce the friction along the inclined needle segment when the battery cell 200 is on the inclined needle segment.

[0026] The spacing between the left ejector unit and the right ejector unit is set to 75mm, the height of the left ejector unit is set to 11mm, the width is set to 55.5mm, the height of the right ejector unit is set to 11mm, the width is set to 56.5mm, compared with the existing ordinary ejector height setting of 10.5mm, by increasing the height of the ejector unit, without adjusting the cavity temperature, by increasing the height of the furnace belt support point, reducing the distance between the upper surface of the battery cell 200 and the heating tube, increasing the upper surface temperature of the battery cell 200, reducing the ohmic contact of the battery cell 200, thereby improving the battery cell conversion efficiency.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-support-point furnace belt ejector for improving sintering, comprising a sintering furnace mesh belt (100), wherein a plurality of mesh belt ejector groups are sequentially arranged at intervals on the sintering furnace mesh belt (100), wherein the mesh belt ejector group comprises a left ejector unit and a right ejector unit, wherein the left ejector unit comprises a left vertical needle segment (1) and a left oblique needle segment (2) which are fixedly connected, and the right ejector unit comprises a right vertical needle segment (3) and a right oblique needle segment (4) which are fixedly connected, and wherein: The inclined surfaces of the left oblique needle section (2) and the right oblique needle section (4) are both provided with grooves (5), and a plurality of mounting rods (6) are sequentially inserted into the grooves (5). The mounting rods (6) are connected with a fixed sphere (7), and a spherical sleeve (8) is rotatably provided on the fixed sphere (7) and is concentrically arranged. The area of ​​the fixed sphere (7) covered by the spherical sleeve (8) is greater than one-half of the surface area of ​​the fixed sphere (7) and less than two-thirds of the surface area of ​​the fixed sphere (7). The vertices on the spherical surfaces of the spherical sleeves (8) on the left oblique needle section (2) that are farthest from the bottom surface of the groove (5) are all in the same plane with the inclined surface of the left oblique needle section (2), and the vertices on the spherical surfaces of the spherical sleeves (8) on the right oblique needle section (4) that are farthest from the bottom surface of the groove (5) are all in the same plane with the inclined surface of the right oblique needle section (4).

2. A high support point furnace with ejector pin for improving sintering according to claim 1, characterized in that: The left vertical needle segment (1) and the left oblique needle segment (2) are an integrally formed structure, and the right vertical needle segment (3) and the right oblique needle segment (4) are an integrally formed structure.

3. A high support point furnace with ejector pin for improving sintering according to claim 1, characterized in that: The mounting rod (6) on the left oblique needle segment (2) or the right oblique needle segment (4) is respectively perpendicular to the oblique surface of the corresponding left oblique needle segment (2) or the right oblique needle segment (4), and the extension line of the mounting rod (6) is located at the center of the fixed sphere (7) and the sphere sleeve (8), and the spherical surface of the sphere sleeve (8) farthest from the mounting rod (6) is located on the oblique surface of the left oblique needle segment (2) or the right oblique needle segment (4).

4. A high support point furnace with ejector pin for improving sintering according to claim 1, characterized in that: A connecting rod (9) is fixedly inserted on the side wall of the groove (5), the connecting rod (9) is arranged between a plurality of ball sleeves (8), and a roller (10) is rotatably sleeved on the connecting rod (9).

5. The high support point furnace with ejector pin for improving sintering according to claim 1, characterized in that: The distance between the left ejector unit and the right ejector unit is set to 75 mm, the height of the left ejector unit is set to 11 mm, the width is set to 55.5 mm, and the height of the right ejector unit is set to 11 mm, the width is set to 56.5 mm.

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