Film strip heating mechanism and backboard film pasting device

Abstract

The utility model provides a film strip heating mechanism and a backboard film pasting device.The film strip heating mechanism comprises a mounting frame, a mounting plate and a plurality of heating heads, the mounting plate is arranged on the mounting frame in the first direction, and the heating heads are arranged on the mounting plate at intervals in the first direction; the bottom surfaces of the plurality of heating heads jointly form a heating surface for heating the reflective film strip; each heating head is connected to the mounting plate in a floatable mode through a first buffer connecting piece, and the heating heads downwards extend out of the mounting plate in the natural state. According to the film strip heating mechanism, the reflective film strip is heated through the heating heads arranged on the mounting plate at intervals, and all the heating heads are connected to the mounting plate in a floating mode, so that when the film strip heating mechanism presses downwards and heats the reflective film strip, it can be ensured that all the heating heads make contact with the reflective film strip, and the heating efficiency of the reflective film strip is improved. And finally, the bonding quality of the reflective film strip and the back plate is ensured.

Description

Technical Field

[0001] This application relates to the field of photovoltaic module production equipment, specifically a film strip heating mechanism and a backsheet film application device. Background Technology

[0002] Photovoltaic modules are typically encapsulated by a backsheet, a lower encapsulating film, cell strings, an upper encapsulating film, and a glass plate. Gaps exist between adjacent cells and between adjacent strings, making it difficult for light energy reaching these gaps to be directly absorbed or utilized. To improve light energy utilization, the industry uses reflective strips on the backsheet at positions corresponding to the gaps between cells and strings. These strips reflect light energy reaching these gaps onto the glass plate, which then reflects it back onto the cells, thus fully utilizing the light energy in these gaps.

[0003] like Figure 1 As shown, the first reflective film strip 200 extending along the short side of the back panel 100 is the reflective film strip corresponding to the inter-sheet position, and the second reflective film strip 300 extending along the long side of the back panel is the reflective film strip corresponding to the inter-string position. The second reflective film strip 300 intersects the first reflective film strip 200 perpendicularly, and the number of reflective film strips varies with the shape of the component.

[0004] One existing method of applying reflective film involves laying the first reflective film strip 200 and / or the second reflective film strip 300 on the back panel, and then heating the reflective film strips using a film strip heating mechanism to release their adhesiveness and adhere them to the back panel.

[0005] Existing film strip heating mechanisms typically use long, strip-shaped heating plates to heat the entire reflective film strip in contact. After prolonged use, the heating surface of the heating plate is prone to bending and deformation, and its flatness decreases. This results in uncontrollable heating of the reflective film strip and the heating effect, ultimately failing to meet the quality requirements for bonding the reflective film strip to the backing plate. Utility Model Content

[0006] To address the aforementioned technical problems, this application provides a diaphragm strip heating mechanism, the detailed technical solution of which is as follows:

[0007] A film strip heating mechanism is used in a device for attaching reflective film strips to the backsheet of a photovoltaic module. The film strip heating mechanism includes a mounting frame, a mounting plate, and several heating heads, wherein:

[0008] The mounting plate is arranged on the mounting frame along the first direction, and a number of heating heads are arranged at intervals along the first direction on the mounting plate. The bottom surfaces of the heating heads together constitute a heating surface for heating the reflective film strip.

[0009] Each heating head is buoyantly connected to the mounting plate via a first buffer connector, and the heating heads extend downwards from the mounting plate in their natural state.

[0010] The film strip heating mechanism provided in this application heats the reflective film strip through a number of heating heads spaced apart on the mounting plate. Since each heating head is buoyantly connected to the mounting plate via a first buffer connector, when the film strip heating mechanism presses down and heats the reflective film strip, it can ensure that all heating heads can eventually contact the reflective film strip through their own floating. By adjusting the position of each heating head on the mounting plate and the heating temperature, the heated part and heating effect of the reflective film strip can be controlled, ultimately ensuring the bonding quality between the reflective film strip and the backing plate.

[0011] In some embodiments, a heating assembly is provided inside the mounting plate, and the mounting plate heats each heating head via the heating assembly; or, each heating head is provided with a heating assembly.

[0012] By incorporating heating components within the mounting plate, the plate can uniformly heat all heating heads, thereby improving the heating uniformity at different locations on the reflective film strip. Furthermore, by installing heating components within each heating head, independent temperature control can be achieved for each head, enhancing the heating effect on the reflective film strip. For example, the temperature of the heating heads located at both ends of the mounting plate can be higher than that of the other heating heads, resulting in a more secure adhesion of the reflective film strip to the backing plate.

[0013] In some embodiments, the first buffer connector includes a guide post, a first limiting sleeve, and a first spring, wherein: the guide post passes through the mounting plate and is movable up and down along the mounting plate; the upper end of the guide post passes through the mounting plate and is fixedly connected to the first limiting sleeve; and the heating head is connected to the lower end of the guide post; the first spring is sleeved on the guide post; the upper end of the first spring abuts against the mounting plate; and the lower end of the first spring abuts against the heating head.

[0014] The heating head extends downwards from the mounting plate in its natural state, and the first spring extends naturally. When the heating head contacts the reflective film strip on the back plate, the mounting plate continues to descend. The guide post and the heating head rise synchronously relative to the mounting plate under pressure. The first spring contracts under pressure, and the heating head elastically presses the reflective film strip against the back plate, ultimately ensuring that all heating heads can contact the film strip.

[0015] In some embodiments, among the plurality of heating heads, the heating head near the first end of the mounting plate has an L-shaped bottom surface facing outwards from the mounting plate and opening at the first end; the heating head near the second end of the mounting plate has an L-shaped bottom surface facing outwards from the mounting plate and opening at the second end; and the remaining heating heads all have a U-shaped bottom surface opening outwards from the mounting plate; or,

[0016] Among the heating heads, the heating head near the first end of the mounting plate has a U-shaped bottom surface that opens towards the first end of the mounting plate, the heating head near the second end of the mounting plate has a U-shaped bottom surface that opens towards the second end of the mounting plate, and the remaining heating heads all have annular bottom surfaces.

[0017] In one film application method, a first reflective film strip (e.g., a reflective film strip corresponding to the inter-sheet position) is laid on a backing plate, and then a second reflective film strip (e.g., a reflective film strip corresponding to the inter-sheet position) is laid on the backing plate. When the second reflective film strip is laid on the backing plate, it intersects the first reflective film strip perpendicularly, creating several intersection points. The thickness of the second reflective film strip at the intersection points is greater than the thickness at other locations on the second reflective film strip. Therefore, if the bottom surface of the heating head is flat, when the heating head presses the second reflective film strip down onto the backing plate, the bottom surface of the heating head will be blocked by the various intersection points on the second reflective film strip, causing the heating head to only heat the intersection points and unable to heat the rest of the second reflective film strip, thus affecting the film application effect. By setting the bottom surface of each heating head of the film strip heating mechanism according to the application position of the second reflective film strip on the back plate, each heating head can avoid the intersection at the corresponding position, and the second reflective film strip and the first reflective film strip around the intersection at the two sides or the middle of the back plate are applied to the back plate, ensuring that the second reflective film strip and the first reflective film strip can be firmly bonded to the back plate.

[0018] In some embodiments, among the heating heads of the film strip heating mechanism, the heating head near the first end of the mounting plate and the heating head near the second end of the mounting plate are each provided with a heating needle. The heating needle is buoyantly connected to the heating head via a second buffer connector and avoids the bottom surface of the heating head. The heating needle is used to heat the end of the reflective film strip.

[0019] Because the bottom surfaces of the heating heads at both ends of the mounting plate are L-shaped or U-shaped, the heating heads at both ends of the mounting plate cannot heat the intersection points of the reflective film strip, causing the two ends of the reflective film strip to fail to adhere to the back plate. By installing heating pins on the heating heads at both ends of the mounting plate, the film strip heating mechanism can press and heat the intersection points of the two ends of the reflective film strip when applying it to the back plate, thereby ensuring that the two ends of the reflective film strip can adhere to the back plate.

[0020] In some embodiments, the heating needle includes a needle rod and a pressure head, and the second buffer connector includes a second limiting sleeve and a second spring, wherein: the needle rod passes through the heating head and can move up and down along the heating head, and the upper end of the needle rod passes through the heating head and is fixedly connected to the second limiting sleeve; the second spring is sleeved on the needle rod, the upper end of the second spring abuts against the heating head, and the lower end of the second spring abuts against the pressure head.

[0021] In its natural state, the pressure head of the heating needle extends downwards from the heating head, and the second spring naturally extends. When the pressure head of the heating needle contacts the film strip, as the heating head continues to descend, the heating needle is compressed and rises relative to the heating head. The second spring is compressed and contracts, causing the heating needle to elastically press against the end of the reflective film strip, preventing damage to the backing plate.

[0022] Optionally, the mounting plate is connected to the mounting bracket via a heat insulation block.

[0023] When assembling the film strip heating mechanism into the backplate film application device, the mounting frame needs to be connected to the moving parts of the drive mechanism, which then drives the mounting plate and its heating head to move. The mounting plate is connected to the mounting frame via a heat insulation block, thus preventing the mounting plate from directly contacting the drive mechanism, thereby reducing heat conduction to the drive mechanism and preventing it from being damaged by heat.

[0024] In some embodiments, a plurality of strip-shaped clearance grooves are provided at intervals along a first direction on the bottom surface of the mounting plate.

[0025] When the heating head presses the reflective film strip onto the back plate, the heating head floats up, and the reflective film strip may come into contact with the mounting plate. By setting a clearance groove on the bottom surface of the mounting plate, the contact area between the mounting plate and the reflective film strip is reduced, thereby reducing the adhesive force between the mounting plate and the reflective film strip. This ensures that after the film strip heating mechanism has completed heating the reflective film strip, the mounting plate and the reflective film strip can be smoothly separated.

[0026] This application also provides a backsheet film application device for applying reflective film strips to the backsheet of a photovoltaic module. The backsheet film application device includes a backsheet support mechanism, a driving mechanism, and several film strip heating mechanisms as described above. The backsheet support mechanism supports the backsheet of the photovoltaic module, and at least several reflective film strips extending along a first direction are laid on the backsheet, with each reflective film strip spaced apart along a second direction. Several film strip heating mechanisms are spaced apart and connected to movable parts of the driving mechanism along the second direction. The driving mechanism is at least used to drive the several film strip heating mechanisms to move synchronously. Each film strip heating mechanism is used to heat one reflective film strip, causing the corresponding reflective film strip to adhere to the backsheet. The second direction is perpendicular to the first direction.

[0027] The backsheet film applicator of this application includes a plurality of film strip heating mechanisms that, under the drive of a driving mechanism, can simultaneously heat a plurality of reflective film strips laid on the backsheet and adhere the plurality of reflective film strips to the backsheet.

[0028] In some embodiments, the driving mechanism includes a moving part and a spacing part, wherein: the spacing part is connected to a movable part of the moving part, and a plurality of film strip heating mechanisms are spaced apart on the movable part of the spacing part along a second direction; the moving part is used to drive the plurality of film strip heating mechanisms to move synchronously; and the spacing part is used to adjust the spacing between the plurality of film strip heating mechanisms.

[0029] By configuring the drive mechanism to include a moving part and a spacing part, on the one hand, the drive mechanism can drive each heating mechanism to move, so that each heating mechanism can move onto the corresponding reflective film strip, press down and heat the corresponding reflective film strip. On the other hand, during the handling process, the spacing part can adjust the spacing between the reflective film strips so that the spacing between the reflective film strips meets the shape requirements of the battery string, thereby improving the compatibility of the backsheet film application device of this application embodiment. Attached Figure Description

[0030] Figure 1 A schematic diagram of the back panel after the reflective film strips have been applied;

[0031] Figure 2 This is a three-dimensional structural schematic diagram of the membrane strip heating mechanism in one embodiment of this application;

[0032] Figure 3 This is a bottom view of the diaphragm heating mechanism in one embodiment of this application;

[0033] Figure 4 This is a schematic diagram showing the positional relationship between the film strip heating mechanism and the reflective film strip in one embodiment of this application;

[0034] Figure 5 This is a side view of the membrane strip heating mechanism in one embodiment of this application;

[0035] Figure 6 for Figure 5 AA section view;

[0036] Figure 7 for Figure 5 BB section view;

[0037] Figure 8 This is a bottom view of the membrane strip heating mechanism in another embodiment of this application;

[0038] Figure 9 This is a schematic diagram showing the positional relationship between the film strip heating mechanism and the reflective film strip in another embodiment of this application;

[0039] Figure 10 This is a top view of the membrane strip heating mechanism in another embodiment of this application;

[0040] Figure 11 for Figure 10 CC section view;

[0041] Figure 12 This is a schematic diagram of the backplate film application device in the embodiments of this application.

[0042] Figures 1 to 12 Includes:

[0043] Drive mechanism 1: moving part 11, spacing part 12;

[0044] Membrane strip heating mechanism 2:

[0045] Mounting bracket 21, mounting plate 22, heating head 23, first buffer connector 24, heating assembly 25, heating needle 27, clearance groove 28, second buffer connector 29, heat insulation block 210, needle rod 271, pressure head 272, first spring 241, guide post 242, limiting ring 243, second spring 291, second limiting sleeve 292;

[0046] Back panel 100, first reflective strip 200, second reflective strip 300. Detailed Implementation

[0047] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] As described in the background section, existing film strip heating mechanisms typically use a long strip-shaped heating plate to heat the entire reflective film strip in contact. After prolonged use, the heating surface of the heating plate is prone to bending deformation and reduced flatness, resulting in uncontrollable heating areas and heating effects on the reflective film strip, thus failing to meet the bonding quality requirements between the reflective film strip and the backing plate.

[0049] To address the aforementioned problems with existing film strip heating mechanisms, this application provides a film strip heating mechanism for an apparatus used to attach reflective film strips to the backsheet of photovoltaic modules. For example... Figures 2 to 4 As shown, the membrane strip heating mechanism 2 in this embodiment includes a mounting frame 21, a mounting plate 22, and a plurality of heating heads 23, wherein:

[0050] Mounting plate 22 is mounted on mounting frame 21 along a first direction (e.g., X direction), and a plurality of heating heads 23 are spaced apart on mounting plate 22 along the first direction. The bottom surfaces of the plurality of heating heads 23 together constitute a heating surface for heating reflective film strips.

[0051] Each heating head 23 is buoyantly connected to the mounting plate 22 via the first buffer connector 24, and the heating heads 23 extend downwards from the mounting plate in their natural state.

[0052] The film strip heating mechanism 2 provided in this application embodiment heats the reflective film strip through a plurality of heating heads 23 spaced apart on the mounting plate 22. Since each heating head 23 is buoyantly connected to the mounting plate 22 via a first buffer connector 24, when the film strip heating mechanism 2 of this application embodiment is pressed down and the reflective film strip is heated, it can ensure that all heating heads 23 contact the reflective film strip. By adjusting the position of each heating head 23 on the mounting plate and the heating temperature, the heated part and heating effect of the reflective film strip can be controlled, ultimately ensuring the bonding quality between the reflective film strip and the backing plate.

[0053] like Figures 5 to 6 As shown, optionally, a heating component 25 is provided inside the mounting plate 22, and the mounting plate 22 heats each heating head 23 through the heating component 25. The mounting plate 22 uniformly heats each heating head 23 through the heating component 25, which can improve the temperature uniformity of each heating head 23, and ultimately make the position of the reflective film strip pressed by each heating head 23 uniformly heated.

[0054] Of course, heating components 25 can also be installed in each heating head 23. In this way, independent temperature control of each heating head 23 can be achieved, improving the heating effect on the reflective film strip. For example, the temperature of the heating heads 23 located at both ends of the mounting plate 22 can be higher than the temperature of the other heating heads 23, so that the two ends of the reflective film strip can be more firmly bonded to the back plate.

[0055] The heating element 25 may be, for example, a heating rod inserted into the mounting plate 22 or the heating head 23. Alternatively, the heating element 25 may also include a thermocouple for temperature sensing.

[0056] like Figures 5 to 6 As shown, optionally, the first buffer connector 24 includes a guide post 242, a first limiting sleeve 243, and a first spring 241, wherein: the guide post 242 passes through the mounting plate 22 and can move up and down along the mounting plate 22; the upper end of the guide post 242 passes through the mounting plate 22 and is fixedly connected to the first limiting sleeve 243; and the heating head 23 is connected to the lower end of the guide post 242. The first spring 241 is sleeved on the guide post 242; the upper end of the first spring 241 abuts against the mounting plate 22, and the lower end of the first spring 241 abuts against the heating head 23.

[0057] The heating head 23 extends downward from the mounting plate 22 in its natural state, and the first spring 241 extends naturally. When the heating head 23 contacts the reflective film strip on the back plate, the mounting plate 22 continues to descend, and the guide post 242 and the heating head 23 rise synchronously relative to the mounting plate 22 after being pressed. The first spring 241 contracts under pressure, and the heating head 23 elastically presses the reflective film strip onto the back plate, ultimately ensuring that all heating heads 23 can contact the reflective film strip.

[0058] refer to Figure 1 As described in the background section, one existing method of applying a reflective film involves placing the first reflective film strip 200 and / or the second reflective film strip 300 on the back plate 100, and then heating the reflective film strip using a film strip heating mechanism to release its adhesiveness and adhere it to the back plate 100.

[0059] One method of applying the reflective film is to first lay the first reflective film strip 200 onto the back panel 100, and then lay the second reflective film strip 300 onto the back panel 100. For example... Figure 1 As shown, each second reflective film strip 300 intersects perpendicularly with the first reflective film strip 200, thus creating several intersection points.

[0060] After the second reflective film strip 300 is laid, the film strip heating mechanism 2 in this embodiment can be used to press down and heat the second reflective film strip 300 and the first reflective film strip 200, so that the second reflective film strip 300 and the first reflective film strip 200 release their adhesiveness after being heated and are simultaneously bonded to the back plate 100.

[0061] In order for the film strip heating mechanism 2 to simultaneously heat the second reflective film strip 300 and the first reflective film strip 200, the position of the heating head 23 on the film strip heating mechanism can be selected so that each heating head 23 corresponds to an intersection point on the second reflective film strip 300.

[0062] However, the thickness at the intersection of the second reflective film strip 300 and the first reflective film strip 200 is greater than the thickness at other locations on the second reflective film strip 300. Therefore, if the bottom surface of the heating head 23 is flat, when the heating head 23 presses the second reflective film strip 300 onto the back plate, the bottom surface of the heating head 23 will be blocked by the intersections on the second reflective film strip 300, causing the heating head 23 to only heat the intersections and not the rest of the second reflective film strip 300, thus affecting the film application effect.

[0063] like Figure 1 As shown, the second reflective film strips 300 at different locations are laid on the back panel 100, and the specific details of their intersections with the first reflective film strip 200 are as follows:

[0064] The ends of the second reflective film strips 300, which are laid on both sides of the back panel 100, form right-angle intersection points E with the first reflective film strips 200. The middle portions of the second reflective film strips 300, which are laid on both sides of the back panel 100, form several T-shaped intersection points F with the first reflective film strips 200. Furthermore, the portions laid on the first side (such as...) Figure 1 The orientation of the intersection point on the second reflective film strip 300 at position I on the upper side is the same as that of the strip laid on the second side (e.g., ...). Figure 1The intersection point on the second reflective film strip 300 at the lower L position is oriented in the opposite direction, or in other words, the intersection point on the second reflective film strip 300 laid on the second side position is mirror-symmetrical with respect to the central axis of the back panel 100 along the length direction with respect to the intersection point on the second reflective film strip 300 laid on the first side position.

[0065] The end of the second reflective film strip 300, which is laid in the middle of the back panel 100, forms a T-shaped intersection F with the first reflective film strip 200, while the middle of the second reflective film strip 300, which is laid in the middle of the back panel 100, forms several cross-shaped intersections G with the first reflective film strip 200. It should be noted that the middle of the back panel 100 refers to any position other than the two sides, not specifically the center of the back panel 100. Similarly, the middle of the second reflective film strip 300 refers to any position other than the two ends, not specifically the center of the second reflective film strip 300.

[0066] like Figures 3 to 4 As shown, in one optional embodiment, among the plurality of heating heads 23 of the film strip heating mechanism 2, the heating head 23 near the first end (e.g., the left end) of the mounting plate 22 has an L-shaped bottom surface that faces the outside of the mounting plate 22 and opens at the first end; the heating head near the second end of the mounting plate 22 has an L-shaped bottom surface that faces the outside of the mounting plate 22 and opens at the second end (e.g., the right end); and the remaining heating heads 23 all have a U-shaped bottom surface that opens towards the outside of the mounting plate 22.

[0067] By configuring the bottom surface of the heating head 23 on the film strip heating mechanism 2 as described above, each heating head 23 of the film strip heating mechanism 2 can avoid the intersection at the corresponding position (or in other words, the intersection enters into the heating head 23), and the second reflective film strip 300 and the first reflective film strip 200 at both sides of the back plate are attached to the back plate 100. Specifically:

[0068] The bottom surface of the heating head 23 near the first end of the mounting plate 22 can avoid the right-angle intersection point E of the first end of the second reflective film strip 300. In addition, the heating head 23 can press the second reflective film strip 300 and the first reflective film strip 200 around the right-angle intersection point E, and simultaneously heat the second reflective film strip 300 and the first reflective film strip 200 around the right-angle intersection point E.

[0069] Similarly, the bottom surface of the heating head 23 near the second end of the mounting plate 22 can avoid the right-angle intersection point E of the second end of the second reflective film strip 300. In addition, the heating head 23 can press the second reflective film strip 300 and the first reflective film strip 200 around the right-angle intersection point E, and simultaneously heat the second reflective film strip 300 and the first reflective film strip 200 around the right-angle intersection point E.

[0070] The bottom surfaces of the remaining heating heads 23 can avoid the corresponding T-shaped intersection F on the second reflective film strip 300. In addition, it can be ensured that each of the remaining heating heads 23 can press the second reflective film strip 300 and the first reflective film strip 200 around the corresponding T-shaped intersection F, and simultaneously heat the second reflective film strip 300 and the first reflective film strip 200 around the T-shaped intersection.

[0071] like Figure 8 As shown (where only half of the membrane heating mechanism 2 is shown), in another alternative embodiment, among the plurality of heating heads 23 of the membrane heating mechanism 2, the heating head 23 near the first end (e.g., the left end) of the mounting plate 22 has a U-shaped bottom surface opening toward the first end of the mounting plate 22, the heating head 23 near the second end (e.g., the right end) of the mounting plate 22 has a U-shaped bottom surface opening toward the second end of the mounting plate 22, and the remaining heating heads 23 all have annular bottom surfaces.

[0072] By configuring the bottom surface of the heating head 23 on the film strip heating mechanism 2 as described above, the film strip heating mechanism 2 can avoid the intersection at the corresponding position (or in other words, allow the intersection to enter the heating head 23), and attach the second reflective film strip 300 and the first reflective film strip 200 at the middle position of the back plate 100 to the back plate 100, ensuring that the second reflective film strip 300 and the first reflective film strip 200 can be firmly bonded to the back plate 100. Specifically:

[0073] The bottom surface of the heating head 23 near the first end of the mounting plate 22 can avoid the T-shaped intersection F of the first end of the second reflective film strip 300. In addition, the heating head 23 can press the second reflective film strip 300 and the first reflective film strip 200 around the T-shaped intersection F, and simultaneously heat the second reflective film strip 300 and the first reflective film strip 200 around the T-shaped intersection F.

[0074] Similarly, the bottom surface of the heating head 23 near the second end of the mounting plate 22 can avoid the T-shaped intersection F of the second end of the second reflective film strip 300. In addition, the heating head 23 can press the second reflective film strip 300 and the first reflective film strip 200 around the T-shaped intersection F, and simultaneously heat the second reflective film strip 300 and the first reflective film strip 200 around the T-shaped intersection F.

[0075] The bottom surfaces of the remaining heating heads 23 can avoid the corresponding cross-shaped intersection G on the second reflective film strip 300. In addition, it can be ensured that each of the remaining heating heads 23 can press the second reflective film strip 300 and the first reflective film strip 200 on all four sides of the corresponding cross-shaped intersection G, and simultaneously heat the second reflective film strip 300 and the first reflective film strip 200 around the cross-shaped intersection G.

[0076] like Figures 3 to 11As shown, optionally, among the plurality of heating heads 23 of the film strip heating mechanism 2, heating needles 27 are provided on the heating head 23 near the first end of the mounting plate 22 and the heating head 23 near the second end of the mounting plate 22. The heating needles 27 are buoyantly connected to the heating head 23 via the second buffer connector 29 and avoid the bottom surface of the heating head 23. The heating needles 27 are used to heat the ends of the reflective film strip.

[0077] By setting heating needles 27 on the heating heads at both ends of the mounting plate 22, when the heating heads 23 of the film strip heating mechanism 2 avoid heating the reflective film strip at the intersection, the heating needles 27 at both ends can perform targeted heating of the intersection of the two ends of the reflective film strip, ensuring that the two ends of the reflective film strip can be bonded to the back plate.

[0078] like Figures 10 to 11 As shown, optionally, the heating needle 27 includes a needle bar 271 and a pressure head 272, and the second buffer connector 29 includes a second limiting sleeve 292 and a second spring 291. The needle bar 271 passes through the heating head 23 and is movable up and down along the heating head 23. The upper end of the needle bar 271 passes through the heating head 23 and is fixedly connected to the second limiting sleeve 292. The second spring 291 is sleeved on the needle bar 271, with its upper end abutting against the mounting plate 22 and its lower end abutting against the pressure head 272 of the heating needle 27.

[0079] In its natural state, the pressure head 272 of the heating needle 27 extends downwards from the heating head 23, and the second spring 291 extends naturally. When the pressure head 272 of the heating needle 27 contacts the film strip, and the heating head 23 continues to descend, the heating needle 27 is pressed and rises relative to the heating head 23. The second spring 291 is compressed and contracts, so that the pressure head 272 of the heating needle 27 elastically presses against the end of the reflective film strip, ensuring that the heating needle 27 presses firmly against the end of the reflective film strip while avoiding damage to the backing plate.

[0080] When assembling the film strip heating mechanism 2 into the film application heating device, the mounting bracket 21 needs to be connected to the moving part of the drive mechanism, and the drive mechanism drives the mounting plate 22 and the heating head 23 on it to move.

[0081] Optionally, the mounting plate 22 is connected to the mounting frame 21 via a heat insulation block 210. Since the mounting plate 22 is connected to the mounting frame 21 via the heat insulation block 210, the mounting plate 22 does not directly contact the drive mechanism, thereby reducing heat conduction to the drive mechanism and preventing heat damage.

[0082] When the film strip heating mechanism 2 presses the reflective film strip against the back plate, the heating head 23 floats upward under pressure, and the bottom surface of the mounting plate 22 may come into contact with the upper surface of the film strip. Optionally, a plurality of strip-shaped clearance grooves 28 are provided at intervals along the first direction on the bottom surface of the mounting plate 22.

[0083] By setting a clearance groove 28 on the bottom surface of the mounting plate 22, the contact area between the mounting plate 22 and the reflective film strip is reduced, thereby reducing the adhesion between the mounting plate 22 and the reflective film strip, ensuring that the mounting plate 22 can smoothly detach from the reflective film strip after the film strip heating mechanism 2 has completed heating.

[0084] like Figure 12 As shown in the embodiments of this application, a backsheet film application device is also provided, which is used to apply reflective film strips to the backsheet of a photovoltaic module. The backsheet film application device includes a backsheet bearing mechanism, a driving mechanism 1, and several film strip heating mechanisms 2 as described in any of the above embodiments. The backsheet bearing mechanism is used to support the backsheet of the photovoltaic module. At least several reflective film strips extending along a first direction (e.g., the X direction) are laid on the backsheet. The reflective film strips are arranged at intervals along a second direction (e.g., the Y direction), and the second direction is perpendicular to the first direction.

[0085] Several film strip heating mechanisms 2 are connected at intervals along a second direction to the movable part of the drive mechanism 1. The drive mechanism 1 is used to drive at least several film strip heating mechanisms 2 to move synchronously. Each film strip heating mechanism 2 is used to heat one reflective film strip, so that the corresponding reflective film strip is adhered to the back plate.

[0086] As can be seen, in the back panel film application device of this application embodiment, the heating mechanism 2 of several film strips can simultaneously heat several reflective film strips laid on the back panel under the drive of the driving mechanism 1, and bond several reflective film strips to the back panel.

[0087] Optionally, the drive mechanism 1 includes a moving part 11 and a spacing part 12, wherein: the spacing part 12 is connected to a movable part of the moving part 11, and a plurality of film strip heating mechanisms 2 are spaced apart and connected to the movable part of the spacing part along a second direction. The moving part 11 is used to drive the plurality of film strip heating mechanisms 2 to move synchronously. The spacing part 12 is used to adjust the spacing between the plurality of film strip heating mechanisms 2.

[0088] By configuring the drive mechanism 1 to include a moving part 11 and a spacing part 12, on the one hand, the drive mechanism 1 can drive each film strip heating mechanism 2 to move, so that each film strip heating mechanism 2 can move onto the corresponding reflective film strip, press down and heat the corresponding reflective film strip. On the other hand, during the handling process, the spacing part 12 can adjust the spacing between the film strips so that the spacing between the film strips meets the pattern requirements of the battery string, thereby improving the compatibility of the backsheet film application device of this application embodiment.

[0089] The moving part 11 can be any existing moving device capable of driving the film heating mechanism 2 to translate and move up and down. For example, the moving part 11 is composed of a translation drive module and a lifting drive module, wherein the translation drive module is used to drive the film heating mechanism 2 to translate, and the lifting drive module is used to drive the film heating mechanism 2 to move up and down. Alternatively, the moving part 11 can be a multi-axis robotic arm.

[0090] The spacing section 12 employs various existing spacing drive mechanisms capable of adjusting the spacing between each film strip heating mechanism 2. For example, the spacing section 12 includes several linear drive components (e.g., cylinders, lead screw modules, etc.) corresponding one-to-one with each film strip heating mechanism 2. Each linear drive component simultaneously drives each film strip heating mechanism 2 to translate along a second direction, thereby adjusting the spacing between each film strip heating mechanism 2. Alternatively, the spacing section 12 may be a linear motor with multiple movers, with each film strip heating mechanism 2 connected to one of the movers of the linear motor. The linear motor uniformly drives each film strip heating mechanism 2 to translate along the second direction, thereby adjusting the spacing between each film strip heating mechanism 2.

[0091] The foregoing has provided a sufficiently detailed and specific description of this application. Those skilled in the art should understand that the descriptions in the embodiments are merely exemplary, and all changes made without departing from the true spirit and scope of this application should fall within the protection scope of this application. The scope of protection claimed in this application is defined by the claims, and not by the above descriptions in the embodiments.

Claims

1. A membrane strip heating mechanism, characterized in that, In a device for attaching reflective film strips to the backsheet of photovoltaic modules, the film strip heating mechanism includes a mounting frame, a mounting plate, and several heating heads, wherein: The mounting plate is disposed on the mounting frame along the first direction, and a plurality of heating heads are disposed at intervals on the mounting plate along the first direction. The bottom surfaces of the plurality of heating heads together constitute a heating surface for heating the reflective film strip. Each of the heating heads is buoyantly connected to the mounting plate via a first buffer connector, and the heating heads extend downwards from the mounting plate in their natural state.

2. The membrane strip heating mechanism as described in claim 1, characterized in that, The mounting plate is provided with a heating component, and the mounting plate heats each of the heating heads through the heating component; or, each of the heating heads is provided with a heating component.

3. The membrane strip heating mechanism as described in claim 1, characterized in that, The first buffer connector includes a guide post, a first limiting sleeve, and a first spring, wherein: The guide post passes through the mounting plate and can move up and down along the mounting plate. The upper end of the guide post passes through the mounting plate and is fixedly connected to the first limiting sleeve. The heating head is connected to the lower end of the guide post. The first spring is sleeved on the guide post, with its upper end abutting against the mounting plate and its lower end abutting against the heating head.

4. The membrane strip heating mechanism as described in claim 1, characterized in that: Of the plurality of heating heads, the heating head near the first end of the mounting plate has an L-shaped bottom surface that faces outward from the mounting plate and opens at the first end; the heating head near the second end of the mounting plate has an L-shaped bottom surface that faces outward from the mounting plate and opens at the second end; the remaining heating heads all have a U-shaped bottom surface that opens outward from the mounting plate; or, Of the plurality of heating heads, the heating head near the first end of the mounting plate has a U-shaped bottom surface that opens toward the first end of the mounting plate, the heating head near the second end of the mounting plate has a U-shaped bottom surface that opens toward the second end of the mounting plate, and the remaining heating heads all have annular bottom surfaces.

5. The membrane strip heating mechanism as described in claim 4, characterized in that: Among the plurality of heating heads of the membrane strip heating mechanism, heating needles are provided on the heating head near the first end of the mounting plate and the heating head near the second end of the mounting plate. The heating needles are buoyantly connected to the heating head via the second buffer connector and avoid the bottom surface of the heating head. The heating needle is used to heat the end of the reflective film strip.

6. The membrane strip heating mechanism as described in claim 5, characterized in that, The heating needle includes a needle rod and a pressure head, and the second buffer connector includes a second limiting sleeve and a second spring, wherein: The needle rod passes through the heating head and can move up and down along the heating head. The upper end of the needle rod passes through the heating head and is fixedly connected to the second limiting sleeve. The second spring is sleeved on the needle bar, with its upper end abutting against the heating head and its lower end abutting against the pressure head.

7. The membrane strip heating mechanism as described in claim 1, characterized in that, The mounting plate is connected to the mounting frame via a heat insulation block.

8. The membrane strip heating mechanism as described in claim 1, characterized in that, The bottom surface of the mounting plate is provided with a number of strip-shaped clearance grooves spaced apart along the first direction.

9. A backplate film application device, characterized in that, The backsheet film application device is used to apply reflective film strips to the backsheet of a photovoltaic module. The backsheet film application device includes a backsheet bearing mechanism, a driving mechanism, and several film strip heating mechanisms as described in any one of claims 1 to 8, wherein: The backsheet support mechanism is used to support the backsheet of the photovoltaic module. At least a plurality of reflective film strips extending along the first direction are laid on the backsheet, and the reflective film strips are arranged at intervals along the second direction. A plurality of the membrane strip heating mechanisms are spaced apart and connected to the movable part of the driving mechanism along the second direction, and the driving mechanism is at least used to drive the plurality of membrane strip heating mechanisms to move synchronously. Each of the film strip heating mechanisms is used to heat one of the reflective film strips, so that the corresponding reflective film strip is adhered to the back plate; The second direction is perpendicular to the first direction.

10. The backsheet film application device as described in claim 9, characterized in that, The drive mechanism includes a moving part and a separating part, wherein: The spacing section is connected to the movable part of the moving part, and a plurality of the film strip heating mechanisms are spaced apart and connected to the movable part of the spacing section along the second direction; The moving part is used to drive the synchronous movement of several of the membrane strip heating mechanisms; The spacing section is used to adjust the spacing between several of the membrane strip heating mechanisms.

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