A load bearing structure for supporting battery cells in a sintering furnace

Abstract

This utility model discloses a support structure for supporting battery cells inside a sintering furnace, comprising: a carrier plate having a first direction and a second direction perpendicular to each other, and having a first carrier plate end and a second carrier plate end opposite to each other; a first buckle extending in the first direction is provided on the first carrier plate end, and a first slot extending in the second direction is provided on the second carrier plate end; a carrier having a first carrier end and a second carrier end opposite to each other, and a carrier middle portion located between the first carrier end and the second carrier end; a second slot and a third slot extending in the second direction are respectively provided on the first carrier end and the second carrier end; the first buckle is used to engage with the second slot or the third slot to achieve connection and fixation between the first carrier plate end and the first carrier end or the second carrier end; a protective gasket is provided on the carrier middle portion; and a fixing structure detachably disposed in the first slot and the second slot or the third slot to connect and fix the second carrier plate end to the first carrier end or the second carrier end.

Description

Technical Field

[0001] This utility model relates to the field of solar cell sintering furnace technology, specifically to a support structure for supporting solar cells inside a sintering furnace. Background Technology

[0002] A solar cell is a photoelectric semiconductor wafer that generates electricity using sunlight. The fabrication process of a solar cell includes cleaning and texturing, front boron diffusion, etching borosilicate glass (BSG) and back junction, oxide passivation contact preparation, front alumina / silicon nitride deposition, back silicon nitride deposition, screen printing, sintering, and testing.

[0003] Sintering requires a solar cell sintering furnace. During the sintering process, the solar cells need a supporting structure. Currently, thin steel bars are commonly used to support the cells, as they are quite hard. This inevitably causes vibrations during transport within the furnace, which can easily lead to edge chipping (the chipping rate caused by thin steel bars is close to 100%). Furthermore, the high thermal conductivity of metal (steel bars) can affect the uniformity of the sintering temperature. The resulting chipping can also increase carrier recombination rates and damage the passivation layer, thus impacting cell efficiency. Utility Model Content

[0004] The purpose of this invention is to address the problems that the current support structure (steel bar) used in the sintering of battery cells easily leads to edge chipping and uneven sintering temperature, thus affecting battery efficiency. A support structure for supporting battery cells in the sintering furnace has been designed to effectively solve the above problems.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] This utility model designs a support structure for supporting battery cells inside a sintering furnace, which includes the following structural configuration:

[0007] A carrier plate having a first direction and a second direction perpendicular to each other, and having a first carrier plate end and a second carrier plate end opposite to each other. A first buckle extending in the first direction is provided on the first carrier plate end, and a first slot extending in the second direction is provided on the second carrier plate end.

[0008] The carrier has a first carrier end and a second carrier end opposite to each other, and a carrier middle portion located between the first carrier end and the second carrier end. The first carrier end and the second carrier end are respectively provided with a second slot and a third slot extending in a second direction. The first buckle is used to engage with the second slot or the third slot to realize the connection and fixation between the first carrier end and the first carrier end or the second carrier end. A protective gasket is detachably provided on the middle portion of the carrier, that is, to protect the battery cell so that it is not easy to chip during sintering in the sintering furnace.

[0009] And a fixing structure, which is detachably disposed in the first slot and the second slot or the third slot, for connecting and fixing the second carrier plate end to the first carrier end or the second carrier end, so as to fix the carrier onto the carrier plate.

[0010] Furthermore, a supporting structure for supporting solar cells inside a sintering furnace: the first buckle is configured as a "T"-shaped structure, which includes a first connecting rod and a first limiting rod that are perpendicular to each other; the first connecting rod is fixedly disposed on the end of the first carrier plate, and the first limiting rod is perpendicularly connected to the first connecting rod and parallel to the first direction.

[0011] Furthermore, a support structure for supporting battery cells inside a sintering furnace includes a first baffle for limiting the displacement of the protective pad in a second direction, and several second baffles for limiting the displacement of the protective pad in the first direction, located in the middle of the carrier. Specifically, the first and second baffles ensure that the protective pad is more stable when placed in the middle of the carrier, making it less likely to fall off.

[0012] Furthermore, a support structure for supporting solar cells within a sintering furnace is provided: the protective pad is made of aerogel material. Aerogel is a porous material with ultra-low density, high porosity, and excellent thermal insulation properties. Its high-temperature resistance and lower hardness compared to silicon wafers make it suitable for supporting solar cells within a sintering furnace.

[0013] Furthermore, a supporting structure for battery cells inside a sintering furnace: the protective pad is integrally formed from a bottom layer, a middle layer and a surface layer, with the bottom layer attached to the middle of the carrier.

[0014] Furthermore, a support structure for supporting battery cells inside a sintering furnace: the fixing structure includes a second buckle and a spring sleeved on the second buckle; the second buckle is detachably disposed in the first slot and the second slot or the third slot, and the spring is used to press the second carrier plate end with the first carrier end or the second carrier end to achieve the connection and fixation of the two.

[0015] Furthermore, a support structure for supporting solar cells inside a sintering furnace includes the following features for the second clip:

[0016] The second connecting rod has a length greater than the sum of the thickness of the second carrier plate end and the thickness of the first carrier end or the second carrier end;

[0017] The second limiting rod is vertically connected to one end of the second connecting rod and forms a "T" shape with it;

[0018] And a limiting plate, which is fixedly disposed at the other end of the second connecting rod, and the spring is sleeved on the second connecting rod and connected to the limiting plate.

[0019] Furthermore, a supporting structure for the battery cells inside a sintering furnace includes a cross-shaped groove on the limiting plate for rotating the second latch. Specifically, an external tool can be inserted into the cross-shaped groove to rotate the limiting plate, thereby rotating the second latch to remove it from the first and second or third latches, thus releasing the fixed connection between the second carrier plate end and the first or second carrier end.

[0020] Furthermore, a supporting structure for supporting battery cells inside a sintering furnace is provided: a limiting groove for limiting the second limiting rod is also provided on the end of the second carrier plate, and the limiting groove is arranged intersecting with the first slot.

[0021] Furthermore, a supporting structure for supporting battery cells inside a sintering furnace: the limiting groove is arranged perpendicularly to the first slot.

[0022] The beneficial effects of this utility model are:

[0023] The supporting structure for the solar cells inside the sintering furnace designed in this utility model can prevent the solar cells from chipping due to vibration during the sintering process by setting up protective pads. At the same time, it can solve the problems of increased carrier recombination rate and damage to the passivation layer caused by solar cell chipping. In addition, the poor thermal conductivity of the protective pads will not affect the uniformity of the solar cell sintering temperature and will not affect the battery efficiency.

[0024] In addition, the supporting structure for the battery cells inside the sintering furnace designed in this utility model has a detachable carrier and carrier plate. This allows the carrier to be removed after long-term use and the protective gaskets on it to be replaced (the protective gaskets can be inverted and reused according to the usage conditions to save costs, or the protective gaskets can be replaced again). This avoids the problem of battery cell breakage and the impact on sintering temperature uniformity caused by wear of the protective gaskets after long-term use, and reduces the impact on battery efficiency.

[0025] The bearing structure for supporting the battery cells inside the sintering furnace designed in this utility model has an elastic aerogel that has a shock-absorbing effect, which can relieve some of the force and prevent the battery cells from shaking up and down when they overlap (protective pads). This reduces the displacement friction of the battery cells during the transportation of the battery cells in the sintering furnace and further avoids the problem of edge breakage caused by the shaking of the battery cells. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram of a supporting structure for battery cells inside a sintering furnace, designed for Embodiment 1 of this utility model;

[0028] Figure 2 An exploded view of the structural components in the load-bearing structure designed for Example 1;

[0029] Figure 3 This is a schematic diagram of the carrier plate in the load-bearing structure designed in Example 1;

[0030] Figures 4-5 An assembly drawing of the carrier plate and the support in the load-bearing structure designed for Example 1;

[0031] Figure 6 A schematic diagram of the support structure designed for Example 1 used to support the battery cells.

[0032] The markings in the image are as follows:

[0033] 1-Carrier plate, 11-First carrier plate end, 12-Second carrier plate end, 13-First buckle, 14-First slot, 131-First connecting rod, 132-First limiting rod;

[0034] 2-Carrier, 21-First carrier end, 22-Second carrier end, 23-Carrier middle, 24-Second slot, 25-Third slot, 26-Protective pad, 27-First baffle, 28-Second baffle;

[0035] 3-Fixed structure, 31-Second buckle, 32-Spring, 311-Second connecting rod, 312-Second limiting rod, 313-Limiting plate, 314-Cross groove;

[0036] 4-Battery cell. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0038] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "top," and "bottom," etc., indicating orientation or positional relationships, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this utility model described herein can be implemented in orders other than those illustrated or described herein.

[0039] Example 1

[0040] like Figures 1-3 As shown, this embodiment 1 designs a support structure for supporting battery cells inside a sintering furnace. The support structure includes the following specific structural configurations:

[0041] The carrier plate 1 has a first direction and a second direction that are perpendicular to each other, and a first carrier plate end 11 and a second carrier plate end 12 that are opposite to each other. The first carrier plate end 11 is provided with a first buckle 13 extending in the first direction. Specifically, the first buckle 13 includes a first connecting rod 131 and a first limiting rod 132. One end of the first connecting rod 131 is fixedly connected to the first carrier plate end 11. The first limiting rod 132 is perpendicularly connected to the other end of the first connecting rod 131 and forms a "T"-shaped structure with it. At the same time, the first limiting rod 132 is arranged parallel to the first direction. The second carrier plate end 12 is provided with a first slot 14 extending in the second direction (the first slot 14 penetrates the second carrier plate end 12). The side of the second carrier plate end 12 opposite to the first buckle 13 is also provided with a limiting groove (the limiting groove does not penetrate the second carrier plate end 12), and the limiting groove intersects the first slot 14 perpendicularly to form a cross-shaped structure.

[0042] The carrier 2 has a first carrier end 21 and a second carrier end 22 opposite to each other, and a carrier middle portion 23 located between the first carrier end 21 and the second carrier end 22. The first carrier end 21 and the second carrier end 22 are respectively provided with a second slot 24 and a third slot 25 extending in a second direction (the second and third slots penetrate the first and second carrier ends respectively). The first buckle 13 is used to engage with the second slot 24 to realize the connection and fixation between the first carrier plate end 11 and the first carrier end 21. It should be understood that the first connecting rod 131 has a length not less than the thickness of the first carrier end 21 (the depth of the second slot 24). The carrier middle portion 23 is also detachably provided with an aerogel material protective pad 26, and a first baffle 27 for limiting the displacement of the protective pad 26 in the second direction and a second baffle 28 for limiting the displacement of the protective pad 26 in the first direction. The protective pad 26 can be integrally formed by a bottom layer, an intermediate layer and a surface layer, with the bottom layer attached to the surface of the carrier middle portion 23.

[0043] And a fixing structure 3, which includes a second buckle 31 and a spring 32 sleeved on the second buckle 31. The second buckle 31 is detachably disposed in the first slot 14 and the third slot 25. The spring 32 is used to press the second carrier plate end 12 and the second carrier end 22 together to achieve the connection and fixation of the two, that is, to fix the carrier 2 on the carrier plate 1.

[0044] The second buckle 31 includes the following structural configuration:

[0045] The second connecting rod 311 has a length greater than the sum of the thicknesses of the second carrier plate end 12 and the second carrier end 22;

[0046] The second limiting rod 312 is vertically connected to one end of the second connecting rod 311 and forms a "T"-shaped structure therewith;

[0047] And a limiting plate 313, which is fixedly disposed at the other end of the second connecting rod 311, and is also provided with a cross groove 314 for rotating the second buckle 31. The spring 32 is sleeved on the second connecting rod 311, one end of which is connected to the limiting plate 313, and the other end is used to abut against the second carrier end 22.

[0048] The supporting structure for the solar cells inside the sintering furnace designed in Embodiment 1 above is a detachable structure. The disassembled structure is as follows: Figure 2 As shown;

[0049] When assembly is required: First, adjust the direction of carrier 2 to be perpendicular to carrier plate 1, then align the second slot 24 with the first buckle 13 and fasten them together (e.g., Figure 4 (As shown), and then rotate the carrier 2 by 90° to align the third slot 25 with the first slot 14 (as shown). Figure 5 (As shown), then adjust the angle of the fixing structure 3 so that the second limiting rod 312 is parallel to the third slot 25, and then insert the second limiting rod 312 into the third slot 25 and the first slot 14. After insertion, rotate the fixing structure 3 by 90° so that the second limiting rod 312 is embedded in the limiting groove. At this time, the spring 32 abuts against the surface of the second carrier end 22 to press the second carrier end 12 and the second carrier end 22, thus completing the connection and fixation of the carrier 1 and the carrier 2.

[0050] When it is necessary to disassemble the carrier 2: an external tool can be used to insert it into the cross groove 314, and then press down on the limiting plate 313. At this time, the spring 32 is compressed, and the second limiting rod 312 is disengaged from the limiting groove. Then, the limiting plate 313 (i.e. the fixing structure 3) is rotated 90° to make the second limiting rod 312 parallel to the first slot 14. Then the fixing structure 3 can be removed to release the fixation between the second carrier plate end 12 and the second carrier end 22. Then, the carrier 2 is rotated 90° to smoothly release the second slot 24 from the first buckle 13, thereby releasing the fixation between the first carrier plate end 11 and the first carrier end 21, and thus removing the carrier 2 from the carrier plate 1.

[0051] The schematic diagram of the supporting structure for the solar cells in the sintering furnace of Embodiment 1 described above, which supports the solar cells 4 during sintering, is shown below. Figure 6As shown, the end of the battery cell 4 overlaps the middle part 23 of the carrier structure. Since a protective pad 26 is provided on the surface of the middle part 23, it acts as a buffer, preventing edge chipping caused by vibration of the battery cell 4. Simultaneously, the protective pad 26 has poor thermal conductivity, so it will not affect the uniformity of the sintering temperature of the battery cell during the sintering process, thus not affecting the battery efficiency. In addition, a first baffle 27 and a second baffle 28 are also provided on the middle part 23 of the carrier. These baffles do not contact the battery cell 4, which can enhance the stability of the protective pad 26, thereby ensuring a more stable position of the battery cell during sintering, reducing vibration, and further reducing the probability of edge chipping of the battery cell 4.

[0052] The above-described preferred embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of this utility model. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A support structure for supporting solar cells inside a sintering furnace, characterized in that, The load-bearing structure includes the following structural features: The carrier plate (1) has a first direction and a second direction that are perpendicular to each other, and has a first carrier plate end (11) and a second carrier plate end (12) that are opposite to each other. A first buckle (13) extending in the first direction is provided on the first carrier plate end (11), and a first slot (14) extending in the second direction is provided on the second carrier plate end (12). The carrier (2) has a first carrier end (21) and a second carrier end (22) opposite to each other and a carrier middle portion (23) located between the first carrier end (21) and the second carrier end (22). The first carrier end (21) and the second carrier end (22) are respectively provided with a second slot (24) and a third slot (25) extending in a second direction. The first buckle (13) is used to engage with the second slot (24) or the third slot (25) to realize the connection and fixation between the first carrier plate end (11) and the first carrier end (21) or the second carrier end (22). A protective gasket (26) is detachably provided on the carrier middle portion (23). And a fixing structure (3), which is detachably disposed in the first slot (14) and the second slot (24) or the third slot (25), for connecting and fixing the second carrier plate end (12) to the first carrier end (21) or the second carrier end (22) so as to fix the carrier (2) onto the carrier plate (1).

2. The supporting structure for supporting battery cells inside a sintering furnace according to claim 1, characterized in that, The first buckle (13) is configured as a "T" shaped structure, which includes a first connecting rod (131) and a first limiting rod (132) that are perpendicular to each other; The first connecting rod (131) is fixedly mounted on the first carrier plate end (11), and the first limiting rod (132) is vertically connected to the first connecting rod (131) and parallel to the first direction.

3. The supporting structure for supporting battery cells inside a sintering furnace according to claim 1, characterized in that, The carrier middle part (23) is also provided with a first baffle (27) for limiting the displacement of the protective pad (26) in the second direction, and a plurality of second baffles (28) for limiting the displacement of the protective pad (26) in the first direction.

4. The supporting structure for supporting battery cells inside a sintering furnace according to claim 3, characterized in that, The protective pad (26) is made of aerogel material.

5. A supporting structure for supporting battery cells inside a sintering furnace according to claim 1 or 4, characterized in that, The protective pad (26) is formed by an integral layer of bottom layer, middle layer and top layer, with the bottom layer attached to the middle part (23) of the carrier.

6. The supporting structure for supporting battery cells inside a sintering furnace according to claim 1, characterized in that, The fixing structure (3) includes a second buckle (31) and a spring (32) sleeved on the second buckle (31); The second buckle (31) is detachably disposed in the first slot (14) and the second slot (24) or the third slot (25), and the spring (32) is used to press the second carrier plate end (12) and the first carrier end (21) or the second carrier end (22) together to achieve the connection and fixation of the two.

7. The supporting structure for supporting battery cells inside a sintering furnace according to claim 6, characterized in that, The second latch (31) includes the following features: The second connecting rod (311) has a length greater than the sum of the thickness of the second carrier plate end (12) and the thickness of the first carrier end (21) or the second carrier end (22); The second limiting rod (312) is vertically connected to one end of the second connecting rod (311) and forms a "T"-shaped structure therewith; And a limiting plate (313), which is fixedly disposed at the other end of the second connecting rod (311), and the spring (32) is sleeved on the second connecting rod (311) and connected to the limiting plate (313).

8. The supporting structure for supporting battery cells inside a sintering furnace according to claim 7, characterized in that, The limiting plate (313) is also provided with a cross groove (314) for rotating the second buckle (31).

9. The supporting structure for supporting battery cells inside a sintering furnace according to claim 7, characterized in that, The second carrier plate end (12) is also provided with a limiting groove for limiting the second limiting rod (312), and the limiting groove is intersected with the first card slot (14).

10. The supporting structure for supporting battery cells inside a sintering furnace according to claim 9, characterized in that, The limiting groove is perpendicular to the first card slot (14).

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