Solar cell film covering equipment

Abstract

The utility model provides solar cell film covering equipment which is provided with a cell linear conveying device, the cell linear conveying device is used for conveying cells in the set conveying direction on the horizontal plane, and the solar cell film covering equipment further comprises a film belt storage device, a film belt conveying and cutting device and a film pasting device which are sequentially arranged in the conveying direction. The film belt storage device is used for placing film belt rolls and successively outputting film belts with preset lengths in the conveying direction, and the film belt conveying and cutting device is movably erected above the battery piece linear conveying device in the conveying direction and used for driving the film belts output by the film belt storage device to move forwards so that the film belts can be conveyed to the film pasting device. And the film pasting device is used for pasting the film on the surface of the battery piece in a hot-pressing and covering mode to form the film. The film coating equipment can efficiently coat the surface of the battery piece with a film, the mechanical automatic process of outputting the film belt from the film belt roll to forming the film on the surface of the battery piece is realized, and the film coating efficiency is high.

Description

Technical Field

[0001] The present application relates to the technical field of solar cell production equipment, and in particular to solar cell coating equipment. Background Art

[0002] There are no grid lines on the front of the back-contact cell, and the silicon nitride anti-reflection film on the front is directly exposed, which is easy to cause surface damage during subsequent transfer and processing. At present, smooth isolation paper needs to be placed between the cells during the transfer and processing of back-contact solar cells. The amount of isolation paper is large, which increases the manufacturing cost; before the cell welding process, an action of removing the isolation paper is required. The actions required in the component manufacturing process are more complicated, which increases the difficulty of subsequent processing and increases the manufacturing cost. Utility Model Content

[0003] The present application provides a solar cell film coating device, which has a cell linear conveying device, which is used to convey the cell along a set conveying direction on a horizontal plane. The solar cell film coating device also includes a film tape storage device, a film tape conveying and cutting device, and a film pasting device arranged in sequence along the conveying direction, wherein:

[0004] The film tape storage device is used to place the film tape roll and output the film tape of preset length in succession along the conveying direction.

[0005] The film tape conveying and cutting device is movably mounted above the battery cell linear conveying device along the conveying direction, and is used to drive the film tape output by the film tape storage device to move forward so that the film tape is conveyed to the film laminating device, and then move backward relative to the film tape to reset and cut the film tape to form a film placed on the battery cell.

[0006] The film laminating device is used to hot-press the film onto the surface of the battery cell to form a film.

[0007] The solar cell film coating equipment provided by the present application can efficiently coat the surface of the cell. The cooperation of the film tape storage device, the film tape conveying and cutting device, and the film pasting device can realize the mechanical automation process of film formation from the film tape roll output to the cell surface, and the coating efficiency is high. It prevents the direct exposure and damage of the silicon nitride anti-reflection film on the front of the back contact cell, ensures the quality of the cell, eliminates the need to remove the isolation paper, simplifies the cell manufacturing operation, and reduces the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0009] Figure 1 This is a schematic diagram of the three-dimensional structure of a solar cell film coating device provided in an embodiment of the present application from one perspective;

[0010] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of the film tape conveying and cutting device along the MM direction;

[0011] Figure 3 It is a front view of the solar cell film coating device at a certain moment in step S30 of the film coating process of the solar cell film coating device provided in an embodiment of the present application;

[0012] Figure 4 It is a front view of the solar cell coating device at a certain moment in step S60 of the coating process of the solar cell coating device provided in an embodiment of the present application.

[0013] Description of reference numerals:

[0014] Solar cell film coating equipment-1;

[0015] Cell linear conveyor-11; double-track synchronous conveyor-111; cell in-place sensor-112;

[0016] Film tape storage device-12; second fixed seat-121; film tape roll driving mechanism-122; reversing roller-123; tensioning roller-124;

[0017] Film tape conveying and cutting device-13; supporting platform-131; first supporting platform portion-131a; second supporting platform portion-131b; inclined pressure surface-S1; third supporting platform portion-131c; cutting groove-131d;

[0018] Film cutting mechanism-132; first telescopic cylinder-1321; cutting knife-1322;

[0019] Film conveying mechanism-133; third telescopic cylinder-1331; second pressing member-1332; connecting beam-1333;

[0020] Film pressing mechanism-134; second telescopic cylinder-1341; first pressing member-1342; inclined pressing surface-S2; guide rail-135; support frame-136; fixed beam-137; slide rail-138;

[0021] Film sticking device-14; first fixed seat-141; telescopic transverse movement mechanism-142; transverse movement guide rail-1421; fourth telescopic cylinder-1422; heating roller-143;

[0022] Film tape-2; Film sheet-21; Film tape roll-22;

[0023] Back contact cell-3;

[0024] Conveying direction - X;

[0025] vertical-Y;

[0026] Tunneling region-A. DETAILED DESCRIPTION

[0027] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0028] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0031] like Figures 1 to 4 As shown, the embodiment of the present application provides a solar cell film coating device 1, which has a cell linear conveying device 11, and the cell linear conveying device 11 is used to convey the cell along a conveying direction X set on a horizontal plane. The solar cell film coating device 1 also includes a film tape 2 storage device 12, a film tape 2 conveying and cutting device 13 and a film pasting device 14 arranged in sequence along the conveying direction X, wherein:

[0032] The film strip 2 storage device 12 is used to place the film strip roll 22 and successively output the film strip 2 of a preset length along the conveying direction X.

[0033] The film tape 2 conveying and cutting device 13 is movably mounted above the cell linear conveying device 11 along the conveying direction X, and is used to drive the film tape 2 output by the film tape 2 storage device 12 to move forward so that the film tape 2 is conveyed to the film attaching device 14, and then move backward relative to the film tape 2 to reset and cut the film tape 2 to form a film sheet 21 placed on the cell.

[0034] The film laminating device 14 is used to thermally press the film 21 onto the surface of the battery cell to form a film.

[0035] The solar cell film coating device 1 provided in the present application can efficiently coat the surface of the cell. The cooperation of the film strip 2 storage device 12, the film strip 2 conveying and cutting device 13 and the film laminating device 14 can realize the mechanical automation process from the film strip roll 22 outputting the film strip 2 to the film forming on the surface of the cell, and the coating efficiency is high. It prevents the back contact cell 3 from being directly exposed and damaged by the front silicon nitride anti-reflection film, ensures the quality of the cell, eliminates the need to remove the isolation paper, simplifies the cell manufacturing operation, and reduces the manufacturing cost.

[0036] Please refer to Figure 1 and Figure 2 In some embodiments of the present application, the film tape 2 conveying and cutting device 13 includes a supporting platform 131, a film cutting mechanism 132 and a film feeding mechanism 133. The supporting platform 131 is located below the film cutting mechanism 132 and the film feeding mechanism 133 and is used to support the film tape 2. In the conveying direction X, the film feeding mechanism 133 is arranged at the rear side of the film cutting mechanism 132 and can move forward and backward relative to the film cutting mechanism 132 and the battery cell linear conveying device 11, wherein,

[0037] The film cutting mechanism 132 has a downward extending cutting state and a first rising retracting state. In the downward extending cutting state, the film cutting mechanism 132 cuts downwardly the film strip 2 located below it. In the first rising retracting state, the film strip 2 can move unhindered along the conveying direction X below the film cutting mechanism 132.

[0038] The film feeding mechanism 133 has a downward pressing forward moving state and a second rising and retracting state. In the downward pressing forward moving state, the film feeding mechanism 133 presses down the film tape 2 output from the film tape 2 storage device 12 to the supporting platform 131, and moves forward relative to the battery cell linear conveying device 11 to push the film tape 2 forward.

[0039] In some embodiments of the present application, the film tape 2 conveying and cutting device 13 further comprises:

[0040] The film pressing mechanism 134 is disposed between the film cutting mechanism 132 and the film feeding mechanism 133, and is also located above the supporting platform 131. The film pressing mechanism 134 has a downward pressing fixed state and a third ascending and retracting state. In the downward pressing fixed state, the film pressing mechanism 134 presses down and fixes the film strip 2 located below it. In the third ascending and retracting state, the film pressing mechanism 134 has no contact with the film strip 2 and the supporting platform 131, so that the film strip 2 can move unobstructedly along the conveying direction X under the film pressing mechanism 134. In some examples, the film strip 2 moves relative to the supporting platform 131 and the battery cell linear conveying device 11 during the process of the film feeding mechanism 133 moving forward relative to the battery cell linear conveying device 11.

[0041] In some embodiments of the present application, the film tape 2 conveying and cutting device 13 further includes:

[0042] The guide rail 135 includes a first guide rail 135 and a second guide rail 135 respectively disposed on both sides of the battery cell linear conveying device 11;

[0043] The support frame 136 is slidably connected to the guide rail 135. A tunnel area A is formed at the bottom of the support frame 136 for the battery cell linear conveying device 11 to pass through. A supporting platform 131 is set in the middle of the support frame 136. A film conveying mechanism 133, a film pressing mechanism 134 and a film cutting mechanism 132 are sequentially arranged on the top of the support frame 136 along the conveying direction X.

[0044] In some embodiments of the present application, the film feeding mechanism 133 is slidably connected to the top of the support frame 136 .

[0045] In these embodiments, the support frame 136 includes a first side plate portion and a second side plate portion, the first side plate portion is correspondingly disposed on the first guide rail 135, and the second side plate portion is correspondingly disposed on the second guide rail 135. The support frame 136 also includes a fixed crossbeam 137 spanning between the top end of the first side plate and the top end of the second side plate, and the fixed crossbeam 137 is located at the top of the support frame 136 near the film attaching device 14.

[0046] In some examples of these embodiments, the film cutting mechanism 132 includes a first telescopic cylinder 1321 and a cutter 1322 disposed at a first telescopic end of the first telescopic cylinder 1321 facing the supporting platform 131 . The first telescopic cylinder 1321 is disposed on the fixed beam 137 .

[0047] The film pressing mechanism 134 includes a telescopic member and a first pressing member 1342 disposed at a second telescopic end of the telescopic member facing the supporting platform 131. The telescopic member is a second telescopic cylinder 1341, and the second telescopic cylinder 1341 is disposed on the fixed beam 137.

[0048] In some embodiments of the present application, the film feeding mechanism 133 is slidably connected to the top of the support frame 136 .

[0049] In these embodiments, the film feeding mechanism 133 includes a third telescopic cylinder 1331 and a second pressing member 1332 disposed at a third telescopic end of the third telescopic cylinder 1331 toward the supporting platform 131. The top of the first side plate portion and the top of the second side plate portion are respectively provided with slide rails 138. Specifically, the top of the first side plate portion is provided with a first slide rail 138 near the film strip 2 storage device 12, and the top of the second side plate portion is provided with a second slide rail 138 near the film strip 2 storage device 12. The first slide rail 138 and the second slide rail 138 are disposed with a relative spacing. The film feeding mechanism 133 also includes a connecting beam 1333, one end of the connecting beam 1333 is slidably connected to the first slide rail 138, and the other end of the connecting beam 1333 is slidably connected to the second slide rail 138. The connecting beam 1333 is slidably disposed on the top of the support frame 136, and the third telescopic cylinder 1331 is disposed on the bottom of the connecting beam 1333 toward the battery cell linear conveying device 11, so that the film feeding mechanism 133 is slidably connected to the top of the support frame 136.

[0050] In some embodiments of the present application, the support platform 131 includes:

[0051] The first support portion 131a is provided corresponding to the film feeding mechanism 133 and is used to support the film strip 2 that is pressed down and moved forward by the film feeding mechanism 133;

[0052] The second support portion 131b is provided corresponding to the film pressing mechanism 134 and has an inclined pressure receiving surface S1.

[0053] The third supporting portion 131c is disposed corresponding to the film cutting mechanism 132, and one end of the third supporting portion 131c is connected to the inclined pressure receiving surface S1 in the conveying direction X, and the other end of the third supporting portion 131c extends forward.

[0054] In some embodiments of the present application, the third support portion 131c is arranged lower than the first support portion 131a in the vertical direction Y perpendicular to the conveying direction X, and a cutting groove 131d is arranged on the third support portion 131c. In some examples, the cutting groove 131d is directly opposite to the cutter 1322 of the first telescopic end, so as to more accurately and quickly cut the film strip 2 to form the film sheet 21 to be coated.

[0055] In some embodiments of the present application, the first pressing member 1342 is formed with an inclined pressing surface S2 that matches the inclined pressing surface. In these embodiments, the first pressing member 1342 and the second support form a corresponding beveled matching surface, which can increase the pressing area of ​​the film strip 2 and enhance the pressing and fixing effect on the film strip 2 during the cutting process. On the other hand, before cutting the film strip 2, the part of the film strip 2 that is fixed by the second pressing member 1332 and the second support is tilted and tensioned, and there is a height difference between the part of the film strip 2 from the cutting groove 131d to the part that is pressed and fixed by the heated roller 143, which is conducive to the efficient and rapid cutting of the film strip 2 by the cutter 1322, and is conducive to ensuring that the cut edge of the film strip 2 is overall straight after cutting, thereby ensuring the cutting quality.

[0056] In some embodiments of the present application, the film sticking device 14 includes:

[0057] The first fixing seat 141 is disposed on one side of the battery cell linear conveying device 11;

[0058] The telescopic transverse movement mechanism 142 is arranged on the top of the fixed seat.

[0059] The heating roller 143 is connected to the telescopic transverse movement mechanism 142 and is disposed above the battery cell linear conveyor 11 . The heating roller 143 can move forward and backward and up and down relative to the battery cell linear conveyor 11 through the telescopic transverse movement mechanism 142 .

[0060] In these embodiments, the first fixing seat 141 includes a side wall portion perpendicular to the extension direction of the battery cell linear conveyor 11, and the telescopic transverse movement mechanism 142 includes a transverse movement guide rail 1421 provided on the side wall portion and a fourth telescopic cylinder 1422 slidably connected to the transverse movement guide rail 1421. The fourth telescopic cylinder 1422 can move forward and backward in the conveying direction X relative to the battery cell linear conveyor 11 through the transverse movement guide rail 1421, driving the heating roller 143 to move forward and backward. The fourth telescopic end of the fourth telescopic cylinder 1422 is connected to the heating roller 143, and the heating roller 143 can move up and down relative to the battery cell linear conveyor 11 through the telescopic movement of the fourth telescopic cylinder 1422. The axial direction of the heating roller 143 is perpendicular to the extension direction of the battery cell linear conveyor 11.

[0061] In some embodiments of the present application, the battery cell linear conveying device 11 has a double-track synchronous conveyor belt 111 and a battery cell in-place sensor 112. The battery cell in-place sensor 112 is set corresponding to the film pasting device 14 and is located between the two tracks of the double-track synchronous conveyor belt 111. The battery cell in-place sensor 112 is used to detect whether there are battery cells transported to the film pasting device 14. If so, the battery cell linear conveying device 11 will suspend conveying the battery cells.

[0062] In some embodiments of the present application, the film tape 2 storage device 12 includes:

[0063] The second fixing seat 121 is disposed on one side of the battery cell linear conveying device 11;

[0064] The film tape roll 22 driving mechanism 122 is disposed on the second fixing seat 121 and is used to store the film tape roll 22 and drive the film tape roll 22 to unwind.

[0065] The roller assembly is arranged on the second fixed seat 121 and is located in front of the film tape roll 22 driving mechanism 122 in the conveying direction X. The roller assembly includes a reversing roller 123 and a tensioning roller 124. The reversing roller 123 is located above the tensioning roller 124 and is used to change the film tape 2 released from the film tape roll 22 to the tensioning roller 124. The tensioning roller 124 can be arranged on the second fixed seat 121 so as to be movable up and down relative to the battery cell linear conveying device 11 and is used to tension the film tape 2 after each unwinding by the film tape roll 22 driving mechanism 122.

[0066] In some examples, the film roll 22 driving mechanism 122 includes a driving motor and a film roll 22 driving roller connected to a power output end of the driving motor, and the film roll 22 is disposed on the film roll 22 driving roller.

[0067] A coating process of the solar cell coating device 1 provided in an embodiment of the present application is described in detail below.

[0068] S10: The cell linear conveyor 11 conveys the back-contact cell 3 forward along the conveying direction X. When the back-contact cell 3 reaches the position of the cell in-place sensor 112, the controller controls the double-track synchronous conveyor belt 111 in the cell linear conveyor 11 to stop rotating according to the position information of the back-contact cell 3 sent by the cell in-place sensor 112. The cell in-place sensor 112 is a photoelectric sensor. The back-contact cell 3 that reaches the position of the cell in-place sensor 112 also corresponds to the position of the film attaching device 14.

[0069] In step S10: the heating roller 143 is at the first starting position at the front of the first fixed seat 141, and the heating roller 143 and the back contact battery cell 3 are spaced apart in the vertical direction Y. The support frame 136 is at the second starting position at the rear of the guide rail 135. The film feeding mechanism 133 is at the third starting position at the rear of the top of the support frame 136, and the film feeding mechanism 133 is in the second rising and retracting state. The tensioning roller 124 is movably arranged on the second fixed seat 121 up and down, and the tensioning roller 124 has an upper limit position and a lower limit position that is closer to the battery cell linear conveying device 11 than the upper limit position, and the tensioning roller 124 can switch back and forth between the upper limit position and the lower limit position. In this step, the tensioning roller 124 is at the lower limit position. The film pressing mechanism 134 is in the third rising and retracting state, and the cutting mechanism is also in the first rising and retracting state.

[0070] S20: The film feeding mechanism 133 is in a downward pressing and forward moving state, and the third telescopic cylinder 1331 of the film feeding mechanism 133 is in an extended state, so that the second downward pressing member 1332 presses down the film tape 2 output from the film tape 2 storage device 12 to the first support platform part 131a of the supporting platform 131. At this time, the film pressing mechanism 134 is in a downward pressing and fixed state, and the second telescopic cylinder 1341 in the film pressing mechanism 134 is in a retracted state so that the first downward pressing member 1342 does not press down and contact the film tape 2. After the second pressing member 1332 is pressed down, the connecting beam 1333 moves forward relative to the support frame 136 through the first slide rail 138 and the second slide rail 138, driving the second pressing member 1332 to move forward, so that the film feeding mechanism 133 as a whole moves forward relative to the support frame 136 and the battery cell linear conveying device 11 along the conveying direction X and drives the film strip 2 to move forward relative to the supporting platform 131 along the conveying direction X, and the support frame 136 remains stationary relative to the battery cell linear conveying device 11, so as to send the starting end of the film strip 2 to the end of the third support platform 131c closest to the film pasting device 14 and make the film strip 2 extend out of the end of the third support platform 131c closest to the film pasting device 14, and the starting end of the film strip 2 extends out of the end of the third support platform 131c closest to the film pasting device 14. In the process of sending the film starting end of the film strip 2 toward the end of the third support part 131c closest to the film laminating device 14, the tension roller 124 moves upward from the lower limit to the upper limit relative to the battery cell linear conveying device 11, and at the same time, the driving motor in the film strip roll 22 driving mechanism 122 drives the film strip roll 22 driving roller shaft to rotate toward the film strip 2 conveying and cutting device 13 to unwind, until the tension roller 124 moves downward from the upper limit to the lower limit relative to the battery cell linear conveying device 11, and the driving motor stops driving the film strip roll 22 driving roller shaft to rotate and stop unwinding. The unwinding length of the film strip roll 22 is equal to the distance that the second pressing member 1332 in the film feeding mechanism 133 moves forward, and is also equal to the film feeding length of the film feeding mechanism 133. When the film feeding mechanism 133 completes the film feeding action, so that the starting end of the film strip 2 extends out of the end of the third support part 131c closest to the film laminating device 14, the film feeding mechanism 133 is in a second ascending and retracting state, and the third telescopic cylinder 1331 in the film feeding mechanism 133 is in a retracted state, so that the second pressing member 1332 moves up and no longer presses down on the film strip 2. At this time, the film pressing mechanism 134 is in a downward pressing and fixed state, and the second telescopic cylinder 1341 in the film pressing mechanism 134 is in an extended state, so that the first pressing member 1342 presses the film strip 2 down on the second support part 131b of the supporting platform 131.

[0071] like Figure 3As shown, S30: the support frame 136 as a whole moves forward (i.e., toward the film pasting device 14) along the guide rail 135 relative to the battery cell linear conveying device 11, and the film tape 2 output by the film tape 2 storage device 12 is driven forward by the downward pressing and fixing action of the first pressing member 1342 in step S20 combined with the movement of the support frame 136, so that the film tape 2 is conveyed to the film pasting device 14, and when the coating starting end of the film tape 2 is just below the heating roller 143, the support frame 136 stops moving forward. When the support frame 136 moves forward and drives the film tape 2 to move forward, the driving motor in the film tape roll 22 driving mechanism 122 drives the film tape roll 22 to drive the roller shaft to rotate toward the film tape 2 conveying and cutting device 13 to unwind, and the tensioning roller 124 in the roller assembly moves upward from the lower limit position to the upper limit position to ensure smooth unwinding. The unwinding length of the film tape roll 22 is equal to the distance the support frame 136 moves forward. When the support frame 136 stops moving forward, the tensioning roller 124 moves downward from the upper limit position to the lower limit position, so that the film tape 2 output from the film tape roll 22 and pressed down by the first pressing member 1342 is in a tensioned state as a whole. Figure 3 The middle tension roller 124 is at the upper limit position. Figure 3 The first side plate portion of the support frame 136 is hidden in the figure to clearly illustrate the structure and status of the film tape 2, the film cutting mechanism 132, the film feeding structure and the film pressing mechanism 134.

[0072] After the support frame 136 stops moving forward, the fourth telescopic cylinder 1422 of the telescopic transverse movement mechanism 142 is in an extended state, so that the heating roller 143 moves downward toward the film strip 2 until the lamination starting end of the film strip 2 is pressed down onto the back contact battery cell 3.

[0073] S40: The film pressing mechanism 134 is in the third ascending and retracting state, and the second telescopic cylinder 1341 controlling the film pressing mechanism 134 is in the retracting state, so that the first pressing member 1342 no longer presses down the film strip 2. At this time, the third telescopic cylinder 1331 is still controlled to be in the retracting state, so that the second pressing member 1332 does not press down the film strip 2, that is, the film feeding mechanism 133 still maintains the second ascending and retracting state. At this time, the film strip 2 from the output end of the film strip roll 22 to the starting end of the film coating of the film strip 2 is in a tensioned state, and the tensioning roller 124 is still in the lower limit position. The support frame 136 moves backward as a whole for a preset distance and then remains stationary. The backward moving distance is less than the length of the back contact battery cell 3 in the conveying direction X.

[0074] In some examples, the backward distance is less than the length of the back contact cell 3 in the conveying direction X so that the coating rate of the coated surface of the back contact cell 3 is less than or equal to 90%.

[0075] S50: The film pressing mechanism 134 is in a downward pressing and fixed state, and the second telescopic cylinder 1341 controlling the film pressing mechanism 134 is in an extended state, so that the second pressing member 1332 presses the film strip 2 to the second support platform 131b. At this time, the film strip 2 is pressed down and fixed by both the second pressing member 1332 and the heating roller 143. The film cutting mechanism 132 is in a downward extending and cutting state, and the first telescopic cylinder 1321 is controlled to be in an extended state, so that the cutter 1322 set at the first telescopic end of the first telescopic cylinder 1321 facing the support platform 131 starts to cut the film strip 2 downward. The cutter 1322 cuts downward and is correspondingly inserted into the cutting groove 131d, thereby improving the cutting effect and the cutting position accuracy. The film strip 2 is cut by the cutter 1322 to form a film 21 covering the surface of the back contact battery cell 3. After the cutting is completed, the first telescopic cylinder 1321 is controlled to be in a retracted state, the cutter 1322 is driven to rise by the first telescopic cylinder 1321, and the film cutting mechanism 132 is switched to the first rising retracted state.

[0076] In some examples, after the film cutting device completes film cutting, the support frame 136 moves backward a short distance as a whole to the second starting position at the rearmost position of the guide rail 135. During the backward movement, the film pressing mechanism 134 is in the third rising and retracting state, the film feeding mechanism 133 is in the second rising and retracting state, and the film cutting mechanism 132 is in the first rising and retracting state. At this time, the film strip roll 22 does not unwind, the tensioning roller 124 is in the lower limit position, and the film strip 2 on the support platform 131 does not move with the support frame 136 and remains stationary.

[0077] S60: The heating roller 143 moves backward through the transverse telescopic mechanism, and hot-presses and bonds the cut film 21 to one surface of the back contact battery cell 3. After the hot-pressing film bonding is completed, the heating roller 143 rises and moves forward through the transverse telescopic mechanism to return to the first starting position at the front of the first fixed seat 141. Specifically, the fourth telescopic cylinder 1422 is kept in an extended state from step S30 to this step, and the fourth telescopic cylinder 1422 in an extended state moves backward along the transverse guide rail 1421, driving the heating roller 143 to move backward. The heating roller 143 heats the film 21 during the backward movement, so that the film 21 is hot-pressed and bonded to one surface of the back contact battery cell 3.

[0078] Then, if Figure 4 As shown, the fourth telescopic cylinder 1422 returns to the retracted state from the extended state, and the heating roller 143 rises and breaks away from the contact with the film 21. The support frame 136 is in the second starting position at the rear of the guide rail 135, the film pressing mechanism 134 is in the third rising and retracted state, the film feeding mechanism 133 is in the second rising and retracted state, and the film cutting mechanism 132 is in the first rising and retracted state. At this time, the film strip roll 22 does not unwind, and the tensioning roller 124 is in the lower limit position. Figure 4The middle tension roller 124 is at the lower limit position. Figure 4 The first side plate portion of the support frame 136 is hidden in the figure to clearly illustrate the structure and status of the film tape 2, the film cutting mechanism 132, the film feeding structure and the film pressing mechanism 134.

[0079] When the fourth telescopic cylinder 1422 moves forward along the transverse guide rail 1421 and drives the heating roller 143 to move forward, and the heating roller 143 is at the first starting position closest to the first fixing seat 141, the coating operation of the next back contact battery cell 3 can be continued from step S10.

[0080] In some examples, the film roll 22 is made of at least one of an EVA film and a POE film.

[0081] In some examples, when laminating the front side of the back-contact cell 3 , the thickness of the film tape roll 22 may be selected to be greater than the height of the back electrode of the back-contact cell 3 .

[0082] The solar cell film coating device 1 provided in the present application can coat the surface to be protected of the cell, especially the back contact cell 3, to protect the surface of the cell, ensure that the possibility of scratching the surface of the cell is reduced during the relative movement of the cell when the cell is transferred during the cell preparation process, greatly protect the structural performance of the cell, improve the production quality of the cell, simplify the process of transferring and processing the back contact cell 3, eliminate the need to place and remove the isolation paper, and reduce the production cost. The material used for the film strip 2 is consistent with the material of the photovoltaic module adhesive film, which can be well matched and integrated into the subsequent solar cell module production process. In the subsequent component lamination step, the protective layer formed by the film 21 can be well integrated with the adhesive film.

[0083] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A solar cell film coating device, characterized in that: The solar cell linear conveying device is provided, and the solar cell linear conveying device is used to convey the solar cell along a set conveying direction on a horizontal plane. The solar cell film coating equipment also includes a film tape storage device, a film tape conveying and cutting device and a film pasting device arranged in sequence along the conveying direction, wherein: The film tape storage device is used to place the film tape roll and successively output the film tape of a preset length along the conveying direction. The film tape conveying and cutting device is movably mounted above the battery cell linear conveying device along the conveying direction, and is used to drive the film tape output by the film tape storage device to move forward so that the film tape is conveyed to the film attaching device, and then move backward relative to the film tape to reset and cut the film tape to form a film sheet placed on the battery cell. The film laminating device is used for laminating the film sheet onto the surface of the battery sheet by hot pressing.

2. The solar cell film coating equipment according to claim 1, characterized in that: The film tape conveying and cutting device comprises a supporting platform, a film cutting mechanism and a film feeding mechanism, wherein the supporting platform is located below the film cutting mechanism and the film feeding mechanism and is used to support the film tape, and in the conveying direction, the film feeding mechanism is arranged at the rear side of the film cutting mechanism and can move forward and backward relative to the film cutting mechanism and the battery sheet linear conveying device, wherein: The film cutting mechanism has a downward extending cutting state and a first rising retracting state, in which the film cutting mechanism cuts downwardly the film strip below it, and in the first rising retracting state, the film strip can move unhindered along the conveying direction below the film cutting mechanism. The film conveying mechanism has a downward pressing forward moving state and a second rising retracted state. In the downward pressing forward moving state, the film conveying mechanism presses down the film tape output from the film tape storage device to the supporting platform, and moves forward relative to the battery cell linear conveying device to push the film tape forward.

3. The solar cell film coating equipment according to claim 2, characterized in that: The film tape conveying and cutting device further comprises: The film pressing mechanism is arranged between the film cutting mechanism and the film conveying mechanism, and is also located above the supporting platform. The film pressing mechanism has a downward pressing and fixing state and a third rising and retracting state. In the downward pressing and fixing state, the film pressing mechanism presses down and fixes the film belt located therebelow. In the third rising and retracting state, the film pressing mechanism has no contact with the film belt and the supporting platform, so that the film belt can move unimpeded along the conveying direction under the film pressing mechanism.

4. The solar cell film coating equipment according to claim 3, characterized in that: The film tape conveying and cutting device also includes: A guide rail, comprising a first guide rail and a second guide rail respectively arranged on both sides of the battery sheet linear conveying device; The support frame is slidably connected to the guide rail, and a tunnel area is formed at the bottom of the support frame for the battery cell linear conveying device to pass through. The supporting platform is arranged in the middle of the support frame, and the film conveying mechanism, the film pressing mechanism and the film cutting mechanism are arranged in sequence on the top of the support frame along the conveying direction.

5. The solar cell film coating equipment according to claim 4, characterized in that: The film feeding mechanism is slidably connected to the top of the supporting frame.

6. The solar cell film coating equipment according to claim 4, characterized in that: The supporting platform comprises: A first support portion, arranged corresponding to the film feeding mechanism, for supporting the film tape pressed down and moved forward by the film feeding mechanism; The second support portion is arranged corresponding to the film pressing mechanism and is formed with an inclined pressure receiving surface. The third supporting platform is arranged corresponding to the film cutting mechanism, one end of the third supporting platform is connected to the inclined pressure surface in the conveying direction, and the other end of the third supporting platform extends forward.

7. The solar cell film coating equipment according to claim 6, characterized in that: The third supporting platform portion is arranged lower than the first supporting platform portion in a vertical direction perpendicular to the conveying direction, and a cutting groove is arranged on the third supporting platform portion.

8. The solar cell film coating equipment according to claim 6, characterized in that: The film pressing mechanism is provided with a telescopic member and a first pressing member arranged at one end of the telescopic member close to the second supporting platform portion, and the first pressing member is formed with an inclined pressing surface adapted to the inclined pressing surface.

9. The solar cell film coating equipment according to claim 1, characterized in that: The film sticking device comprises: A first fixing seat, disposed on one side of the battery sheet linear conveying device; The telescopic transverse movement mechanism is arranged on the top of the fixed seat. The heating roller is connected to the telescopic transverse movement mechanism and is arranged above the battery cell linear conveying device. The heating roller can move forward and backward and up and down relative to the battery cell linear conveying device through the telescopic transverse movement mechanism.

10. The solar cell film coating equipment according to claim 1, characterized in that: The battery cell linear conveying device has a double-track synchronous conveyor belt and a battery cell in-place sensor. The battery cell in-place sensor is set corresponding to the film pasting device and is located between the two tracks of the double-track synchronous conveyor belt. The battery cell in-place sensor is used to detect whether there are battery cells conveyed to the film pasting device. If so, the battery cell linear conveying device will suspend conveying the battery cells.

11. The solar cell film coating equipment according to claim 1, characterized in that: The film tape storage device comprises: A second fixing seat is arranged on one side of the battery sheet linear conveying device; The film tape roll driving mechanism is arranged on the second fixing seat and is used for storing the film tape roll and driving the film tape roll to unwind. A roller assembly is arranged on the second fixed seat and is located in front of the film tape roll driving mechanism in the conveying direction. The roller assembly includes a reversing roller and a tensioning roller. The reversing roller is located above the tensioning roller and is used to reverse the film tape unwound from the film tape roll to the tensioning roller. The tensioning roller is arranged on the second fixed seat so as to be movable up and down relative to the battery cell linear conveying device and is used to tension the film tape after each unwinding by the film tape roll driving mechanism.

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