Back contact cell basket

Abstract

The utility model belongs to photovoltaic cell manufacturing technical field, concretely relates to a kind of flower basket for back contact cell piece. The flower basket includes frame body and bracket, bracket includes support plate, support plate can be moved along vertical direction relative to the plug piece space;When support plate moves to first position, support plate is not higher than the lower groove wall of slot;When support plate moves to second position, support plate is used to support the middle part of the front of back contact cell piece, the upper groove wall of slot is abutted on the two sides of the back of back contact cell piece. When support plate moves to first position, it can avoid support plate to interfere with back contact cell piece to enter and exit plug piece space;When support plate moves to second position, support plate exerts upward force on the middle part of the front of back contact cell piece, the upper groove wall of slot exerts downward force on the two sides of the back of back contact cell piece, so that back contact cell piece keeps natural state or even has the trend of reverse bending towards back, to improve the problem that the deformation amplitude of back contact cell piece increases in flower basket.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic cell manufacturing technology, specifically to a flower basket for back-contact solar cells. Background Technology

[0002] In the production process of photovoltaic cells, baskets are key tooling for loading, transporting, and storing cells. A basket typically includes a top cover, a bottom plate, and toothed bars. The toothed bars are arranged in pairs on the left and right sides, and each toothed bar has several inward-facing teeth spaced apart along its longitudinal direction. A slot is formed between two adjacent teeth of equal height on the same toothed bar, allowing the back-contact solar cells to be inserted into the slot.

[0003] Especially for back contact cells, since the back contact cells only have solder strips on the back side, when the solder strips on the back side cool and shrink, the solder strips will exert a tensile force on the back side to form a warp, so that the back contact cells are naturally curved with the front side arching upwards.

[0004] When the back contact solar cell is placed face down in a traditional flower basket, it is very easy for the deformation of the back contact solar cell to increase, which in turn affects the yield of the back contact solar cell processing. Utility Model Content

[0005] To address the issue of increased deformation amplitude in back-contact battery cells, this invention provides a flower basket for back-contact battery cells.

[0006] A flower basket for back-contact battery cells according to an embodiment of the present invention includes: The frame body includes a pair of vertical toothed bars, each toothed bar having basket teeth spaced apart along its longitudinal direction, slots being formed between adjacent basket teeth on the same toothed bar, and insert spaces being formed between slots of equal height on the toothed bars; The bracket includes a tray corresponding to each of the insert spaces, the tray being disposed between the paired toothed bars, and the tray being vertically movable relative to the insert spaces to a first position and a second position. When the tray moves to the first position, the tray is not higher than the lower wall of the slot; when the tray moves to the second position, the tray is used to support the center of the front side of the back contact battery cell, and the upper wall of the slot is used to abut against the two sides of the back side of the back contact battery cell.

[0007] In some embodiments, when the tray moves to the first position, the tray can lift the center of the front side of the back contact battery cell, and the lower groove wall of the slot can lift the two sides of the front side of the back contact battery cell.

[0008] In some embodiments, the bracket further includes a support rod, which is vertically arranged and connected to the rear end of the tray.

[0009] In some embodiments, the frame body further includes a top cover, the top cover having a clearance hole corresponding to the support rod, the top of the support rod being able to pass through the clearance hole and extend out of the top cover; When the top of the support rod is flush with the top of the top cover, the support plate moves to the first position; when the top of the support rod extends beyond the top of the top cover, the support plate moves to the second position. The bracket also includes a return spring for pushing the top of the support rod out of the top of the top cover, so that the support plate is held in the second position.

[0010] In some embodiments, the frame body further includes a vertically arranged fixing frame, and the support rod is connected to the fixing frame via a movable sub-assembly.

[0011] In some embodiments, the movable sub-assembly includes a guide rail and a slider, the guide rail being vertically fixed on the mounting bracket, the slider being movably disposed on the guide rail, and the support rod being fixedly connected to the slider.

[0012] In some embodiments, the moving sub-component further includes an upper limit block and a lower limit block disposed on the guide rail. When the slider contacts the upper limit block to achieve a limit, the tray moves to a second position; when the slider contacts the lower limit block to achieve a limit, the tray moves to a first position.

[0013] In some embodiments, the reset spring is disposed between the lower limit block and the slider.

[0014] In some embodiments, the tray has at least a buffer layer on its surface.

[0015] In some embodiments, a buffer pad is provided between the upper limit block and the slider.

[0016] This utility model adds a bracket to the basket for back-contact battery cells. The bracket includes a support plate corresponding to the insertion space of the battery cells. The support plate can be moved vertically to a first position and a second position. When the support plate is moved to the first position, it is not higher than the lower wall of the slot, thus avoiding interference with the insertion of the back-contact battery cells into and out of the insertion space. When the support plate is moved to the second position, it applies an upward force to the center of the front side of the back-contact battery cell, and the upper wall of the slot applies a downward force to both sides of the back side of the battery cell. The forces applied by the support plate and the slot to the back-contact battery cell can balance the tension of the solder strip on the back-contact battery cell and the weight of the back-contact battery cell itself, keeping the back-contact battery cell in a natural state or even having a tendency to bend in the opposite direction to the back side, thereby playing a corrective role and improving the problem of increased deformation of the back-contact battery cell in the basket. Attached Figure Description

[0017] Figure 1 A schematic diagram of a back-contact battery cell placed in a traditional flower basket; Figure 2 This is a schematic diagram of the structure of a flower basket for a back contact battery cell according to one embodiment of this application; Figure 3 This is a schematic diagram of the assembly structure of the bracket according to one embodiment of this application; Figure 4 This is a schematic diagram of the structure of the support rod extending out of the top cover according to one embodiment of this application; Figure 5 This is a schematic diagram of the structure of a movable sub-component according to one embodiment of this application; Figure 6 A schematic diagram showing the structure of the pallet moving to the second position when the flower basket is unloaded; Figure 7 A schematic diagram showing the structure of the pallet moving to the first position when the flower basket is unloaded; Figure 8 This is a schematic diagram of the structure in which the tray moves to the first position when the back contact battery cell is inserted or removed. Figure 9 This is a schematic diagram showing the structure of the tray moving to the first position after the back contact battery cell is installed. Figure 10 This is a schematic diagram showing the structure of the tray moving to the second position after the back contact battery cell is installed.

[0018] In the diagram: Top cover 10, clearance hole 11, toothed rod 20, basket tooth 21, slot 22, upper slot wall 23, lower slot wall 24, insert space 25, support rod 30, support plate 31, return spring 32, guide rail 40, slider 41, upper limit block 42, lower limit block 43, buffer pad 44, base plate 50, fixing bracket 60, back contact battery cell 70. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] The orientations or positional relationships indicated by terms such as "front," "rear," "left," "right," "middle," and "horizontal" used in this specification are based on the orientations or positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] See details Figure 1 When the back contact battery cell 70 is placed face down in a traditional flower basket, the slot 22 can only support the left and right edges of the front side of the back contact battery cell 70, while the middle part of the back contact battery cell 70 has no additional support structure. Because the back contact battery cell 70 is face down, the middle part of the back contact battery cell 70 has an initial curvature. Under the tension of the solder ribbon and its own weight, the deformation of the middle part of the back contact battery cell 70 is easily increased, which in turn affects the yield of the back contact battery cell 70.

[0022] To address the issue of increased deformation of the back contact solar cell 70, this embodiment provides a basket for the back contact solar cell. See details... Figure 2 and Figure 6 The back contact battery cell basket includes a frame body and a bracket. The frame body includes a pair of vertically arranged toothed bars 20. Each toothed bar 20 has basket teeth 21 spaced apart along its longitudinal direction. Adjacent basket teeth 21 on the same toothed bar 20 form slots 22. Insertion spaces 25 are formed between the slots 22 of equal height on the pair of toothed bars 20. The bracket includes a tray 31 corresponding to the insertion spaces 25. The tray 31 is disposed between the pair of toothed bars 20 and can be moved vertically to a first position and a second position relative to the insertion spaces 25.

[0023] See details Figure 7-9 When the tray 31 moves to the first position, the tray 31 is not higher than the lower groove wall 24 of the slot 22. See details. Figure 6 and 10 When the tray 31 moves to the second position, the tray 31 is used to support the center of the front of the back contact battery cell 70, and the upper groove wall 23 of the slot 22 is used to abut against the two sides of the back of the back contact battery cell 70.

[0024] In this embodiment, the basket for the back contact battery cell is equipped with a bracket, which includes a support plate 31 corresponding to the insertion space 25. The support plate 31 can be moved vertically to a first position and a second position. When the support plate 31 moves to the first position, the support plate 31 is not higher than the lower groove wall 24 of the slot 22, so as to avoid the support plate 31 interfering with the back contact battery cell 70 entering and exiting the insertion space 25. When the support plate 31 moves to the second position, the support plate 31 applies an upward force to the center of the front side of the back contact battery cell 70, and the upper groove wall 23 of the slot 22 applies a downward force to both sides of the back side of the back contact battery cell 70. The forces applied by the support plate 31 and the slot 22 to the back contact battery cell 70 can balance the tension of the welding strip on the back contact battery cell 70 and the weight of the back contact battery cell 70, so that the back contact battery cell 70 maintains a natural state or even has a tendency to bend in the opposite direction to the back side, thereby playing a corrective role and improving the problem of increased deformation of the back contact battery cell 70 in the basket.

[0025] It should be noted that, since the back contact battery cell 70 has a certain degree of toughness, the method of using the support plate 31 in conjunction with the upper groove wall 23 of the slot 22 to control the reverse bending of the back contact battery cell 70 for correction will not damage the battery cell.

[0026] like Figure 2 The frame body shown also includes a top cover 10 and a bottom plate 50 that are parallel to each other. The top cover 10 is located on top of the toothed rods 20, and the bottom plate 50 is located at the bottom of the toothed rods 20. The top cover 10 and the bottom plate 50 are usually rectangular or square. The top cover 10 and the bottom plate 50 connect the top and bottom of the paired toothed rods 20 into a whole, ensuring the stability of the frame body structure. The paired arrangement of the toothed rods 20 specifically means that each pair of toothed rods 20 is arranged on the left and right sides of the frame body, and the number of toothed rods 20 can be set to one, two, or more pairs as needed.

[0027] See details Figure 6-10 Each tooth 21 on the toothed rod 20 faces the toothed rod 20 on the opposite side, and the number of teeth 21 corresponds one-to-one. The slot 22 is formed by two adjacent teeth 21 on the same toothed rod 20, and each slot 22 specifically includes a slot opening, an upper slot wall 23, and a lower slot wall 24. The insert space 25 is defined by slots 22 at the same horizontal height, allowing a back-contact battery sheet 70 to freely enter and exit from the front of an insert space 25. The upper slot wall 23 and lower slot wall 24 of the slot 22 are inclined, making the slot opening wider than the bottom, and the slot 22 is generally flared to facilitate the entry and exit of the back-contact battery sheet 70. Since the structure of the top cover 10, bottom plate 50, toothed rod 20, teeth 21, slot 22, and insert space 25 of the flower basket is existing technology, it will not be described in detail in this embodiment.

[0028] See details Figure 9 When the support plate 31 moves to the first position, it preferably supports the center of the front side of the back contact battery cell 70, and the lower groove wall 24 of the slot 22 supports the two sides of the front side of the back contact battery cell 70. When the two sides of the front side of the back contact battery cell 70 rest on the lower groove wall 24 of the slot 22, the support plate 31 at the first position can support the center of the front side of the back contact battery cell 70, which helps to prevent the center of the back contact battery cell 70 from continuing to sag and deform due to its own weight.

[0029] See details Figure 2-3The bracket in this embodiment also includes a support rod 30, which is vertically arranged and connected to the rear end of the support plate 31 to facilitate the synchronous movement of all support plates 31 and avoid interference with the entry and exit of the back contact battery cell 70 into the insertion space 25. It should be noted that, since the back contact battery cell 70 enters and exits the insertion space 25 from the front end, in order to avoid interference with the entry and exit of the back contact battery cell 70, the front end of the support plate 31 extends into the interior of the insertion space 25 from the rear end of the insertion space 25. Therefore, the support rod 30 is connected to the rear end of the support plate 31.

[0030] See details Figure 3-4 In this embodiment, the top cover 10 of the frame body has a clearance hole 11 corresponding to the support rod 30. The top of the support rod 30 can pass through the clearance hole 11 and extend out of the top cover 10. When the top of the support rod 30 is flush with the top of the top cover 10, the support plate 31 moves to the first position; when the top of the support rod 30 extends out of the top of the top cover 10, the support plate 31 moves to the second position. The bracket in this embodiment also includes a return spring 32, which is used to push the top of the support rod 30 out of the top of the top cover 10, so that the support plate 31 is held in the second position.

[0031] During the loading and unloading stages of the flower basket, the top cover 10 of the flower basket is connected to the loading and unloading mechanism. The connecting part of the loading and unloading mechanism is attached to the top of the top cover 10. Because the top of the top cover 10 is blocked, the support rod 30 moves downward under the action of the loading and unloading mechanism, overcoming the elastic force of the return spring 32, so that the top of the support rod 30 is flush with the top of the top cover 10. At this time, the support plate 31 moves to the first position, and the back contact battery cell 70 can smoothly enter and exit the insertion space 25.

[0032] After the flower basket is fully loaded, it is unloaded from the loading and unloading mechanism. The top of the top cover 10 is unobstructed, and the support rod 30 moves upward under the action of the return spring 32, so that the top of the support rod 30 extends out of the top of the top cover 10. At this time, the support plate 31 moves to the second position, and the support plate 31 can cooperate with the upper groove wall 23 of the slot 22 to keep the back contact battery cell 70 in a natural state.

[0033] The back-contact battery cell basket of this embodiment does not require additional driving components. This basket, in conjunction with existing loading and unloading mechanisms, allows the support rod 30 to extend beyond the top cover 10 or to be flush with the top cover 10, thereby controlling the movement of the control plate 31 to the first and second positions. This ensures the basket can smoothly accommodate the back-contact battery cells 70 entering and exiting the insertion space 25, while effectively mitigating the problem of increased deformation. Its structure is simple and low-cost. It should be noted that some embodiments allow manual control of the support plate 31's movement, while others may use electrical components to automatically control its movement. This embodiment only shows one vertical column of support plates 31; some embodiments may also provide two or more columns of support plates 31 as needed.

[0034] The frame body of this embodiment also includes a vertically arranged fixing frame 60, which is located on the rear side of the insert space 25. The top of the fixing frame 60 is fixedly connected to the top cover 10, and the bottom of the fixing frame 60 is fixedly connected to the bottom plate 50. The support rod 30 is connected to the fixing frame 60 through a movable sub-assembly so that the support rod 30 can drive all the support plates 31 to move smoothly in the vertical direction.

[0035] See details Figure 5 In this embodiment, the movable sub-assembly preferably includes a guide rail 40 and a slider 41. The guide rail 40 is vertically fixed on the fixing frame 60, and the slider 41 is movably mounted on the guide rail 40. The support rod 30 is fixedly connected to the slider 41. The movable sub-assembly composed of the guide rail 40 and the slider 41 has a simple structure and low cost. In some embodiments, the movable sub-assembly can also be selected from conventional components such as a slide groove and slider or a guide post and guide sleeve, depending on the requirements.

[0036] The movable sub-assembly in this embodiment also includes an upper limit block 42 and a lower limit block 43 disposed on the guide rail 40 to correspondingly limit the movement distance of the slider 41. When the slider 41 contacts the upper limit block 42 and is limited, the support plate 31 moves to the second position; when the slider 41 contacts the lower limit block 43 and is limited, the support plate 31 moves to the first position. In this embodiment, the return spring 32 is preferably disposed between the lower limit block 43 and the slider 41. The return spring 32 can push the slider 41 to move the support rod 30, so that the support rod 30 moves the support plate 31 to maintain it in the second position.

[0037] In this embodiment, a buffer pad 44 is preferably provided between the upper limit block 42 and the slider 41. The buffer pad 44 absorbs the impact between the slider 41 and the upper limit block 42, extending the service life. The support plate 31 has at least one buffer layer on its surface. The buffer layer can prevent the support plate 31 from making hard contact with the front of the back contact battery cell, preventing the back contact battery cell 70 from being scratched due to direct contact or from being cracked or even broken due to impact. It should be noted that the buffer pad 44 and the buffer layer in this embodiment can be selected from conventional rubber or plastic that meets the requirements, so they will not be described in detail in this embodiment.

[0038] The process of the back contact battery cell 70 entering and exiting the back contact battery cell basket in this embodiment is as follows: See details Figure 6 When the basket for back contact with the battery cell is unloaded, the reset spring 32 pushes the support rod 30 to extend out of the top cover 10, so that the support plate 31 moves upward to the second position along with the support rod 30.

[0039] See details Figure 7During the back contact battery cell loading / unloading stage, the basket is connected to the loading / unloading mechanism. The loading / unloading mechanism pushes the top of the support rod 30 down to be flush with the top cover 10, so that the support plate 31 moves down with the support rod 30 to the first position.

[0040] See details Figure 8 During the loading / unloading stage of the back contact solar cell using a basket, the back contact solar cell 70 is input into or output into the insert space 25 using a conveying device, and the tray 31 is kept in the first position to facilitate the smooth entry and exit of the back contact solar cell 70.

[0041] See details Figure 9 During the loading / unloading stage of the back contact battery cell using a basket, the two sides of the front of the back contact battery cell 70 are supported by the lower groove wall 24 of the corresponding slot 22. The support plate 31 is held in the first position, and the support plate 31 supports the middle of the front of the back contact battery cell 70 to prevent the middle of the back contact battery cell 70 from continuing to sag and deform due to gravity.

[0042] See details Figure 10 After the basket containing the back contact battery cells is fully loaded, the basket is removed from the loading and unloading mechanism. The return spring 32 pushes the support rod 30 to extend out of the top cover 10, so that the support plate 31 moves upward to the second position along with the support rod 30. The two sides of the back of the back contact battery cell 70 abut against the upper groove wall 23 of the corresponding slot 22. The support plate 31 lifts the middle of the front of the back contact battery cell 70, so that the back contact battery cell 70 remains in a natural state or even has a tendency to bend in the opposite direction to the back, so as to prevent the middle of the back contact battery cell 70 from deforming due to the tension of the welding strip and its own weight.

[0043] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A flower basket for back-contact battery cells, characterized in that, include: The frame body includes a pair of vertical toothed bars (20), each toothed bar (20) having basket teeth (21) spaced apart along its longitudinal direction, and slots (22) being formed between adjacent basket teeth (21) on the same toothed bar (20), and insert spaces (25) being formed between slots (22) of equal height on the toothed bar (20). The bracket includes a tray (31) corresponding to the insert space (25) in one-to-one, the tray (31) being disposed between the paired toothed bars (20), and the tray (31) being vertically movable relative to the insert space (25) to a first position and a second position. When the tray (31) moves to the first position, the tray (31) is not higher than the lower groove wall (24) of the slot (22); when the tray (31) moves to the second position, the tray (31) is used to support the middle of the front of the back contact battery cell (70), and the upper groove wall (23) of the slot (22) is used to abut against the two sides of the back of the back contact battery cell (70).

2. The flower basket for back contact battery cells according to claim 1, characterized in that: When the tray (31) moves to the first position, the tray (31) can lift the middle part of the front of the back contact battery cell (70), and the lower groove wall (24) of the slot (22) can lift the two sides of the front of the back contact battery cell (70).

3. The flower basket for back-contact battery cells according to claim 1 or 2, characterized in that: The bracket also includes a support rod (30), which is vertically arranged and connected to the rear end of the support plate (31).

4. The flower basket for back contact battery cells according to claim 3, characterized in that: The frame body also includes a top cover (10), the top cover (10) having a clearance hole (11) corresponding to the support rod (30), the top of the support rod (30) being able to pass through the clearance hole (11) and extend out of the top cover (10). When the top of the support rod (30) is flush with the top of the top cover (10), the support plate (31) moves to the first position; when the top of the support rod (30) extends beyond the top of the top cover (10), the support plate (31) moves to the second position. The bracket also includes a return spring (32) for pushing the top of the support rod (30) out of the top of the top cover (10) to keep the support plate (31) in the second position.

5. The flower basket for back contact battery cells according to claim 4, characterized in that: The frame body also includes a vertically arranged fixing frame (60), and the support rod (30) is connected to the fixing frame (60) through a movable sub-assembly.

6. The flower basket for back contact battery cells according to claim 5, characterized in that: The movable sub-assembly includes a guide rail (40) and a slider (41). The guide rail (40) is vertically fixed on the fixed frame (60), and the slider (41) is movably disposed on the guide rail (40). The support rod (30) is fixedly connected to the slider (41).

7. The flower basket for back contact battery cells according to claim 6, characterized in that: The moving sub-component also includes an upper limit block (42) and a lower limit block (43) disposed on the guide rail (40). When the slider (41) contacts the upper limit block (42) to achieve a limit, the pallet (31) moves to the second position; when the slider (41) contacts the lower limit block (43) to achieve a limit, the pallet (31) moves to the first position.

8. The flower basket for back contact battery cells according to claim 7, characterized in that: The reset spring (32) is disposed between the lower limit block (43) and the slider (41).

9. The flower basket for back contact battery cells according to claim 1, characterized in that: The tray (31) has at least a buffer layer on its surface.

10. The flower basket for back contact battery cells according to claim 7, characterized in that: A buffer pad (44) is provided between the upper limit block (42) and the slider (41).

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