Photovoltaic sizing device and photovoltaic module

Abstract

The embodiment of the utility model relates to the photovoltaic field, and provides a photovoltaic sizing device and a photovoltaic assembly, the photovoltaic sizing device comprises a glue box used for containing glue, and the bottom surface of the glue box is provided with a hole penetrating through the bottom surface of the glue box; the roller is connected with the glue box, the bottom face of the glue box faces the roller, and the roller rotates around the axis and extends in the first direction; the multiple brush heads are arranged on the outer surface of the roller at intervals, the brush heads extend into the glue box to dip in glue when rotating along with the roller and passing through the holes, the brush heads at least comprise one brush head set, and one brush head set is used for applying glue to one battery. At least the sizing efficiency of the photovoltaic sizing device can be improved.

Description

Technical Field

[0001] The embodiments of the utility model relate to the photovoltaic field, and in particular to a photovoltaic glue application device and a photovoltaic component. Background Art

[0002] Photovoltaic cells are devices that directly convert light energy into electrical energy through the photoelectric effect or photochemical effect. Single photovoltaic cells cannot be used directly for power generation. Several cells must be connected in series and parallel through welding strips and tightly sealed into modules before use. Photovoltaic modules are the core part of solar power generation systems and also the most important part of solar power generation systems. The function of photovoltaic modules is to convert solar energy into electrical energy, or send it to batteries for storage, or drive loads to work.

[0003] When multiple cells are electrically connected to form a cell string through a welding ribbon, in order to ensure the stability of the connection between the cell and the welding ribbon, glue can generally be applied to the cell through a photovoltaic glue application device. However, the glue application efficiency of the current photovoltaic glue application device is low. Utility Model Content

[0004] The embodiments of the utility model provide a photovoltaic glue applying device and a photovoltaic module, which are at least beneficial to improving the glue applying efficiency of the photovoltaic glue applying device.

[0005] According to some embodiments of the utility model, on the one hand, the embodiments of the utility model provide a photovoltaic gluing device, comprising: a glue box, the glue box is used to hold glue, and the bottom surface of the glue box has a hole that penetrates the bottom surface of the glue box; a roller, the roller is connected to the glue box, and the bottom surface of the glue box faces the roller, the roller rotates around an axis, and the roller extends along a first direction; a plurality of brush heads, the plurality of brush heads are arranged at intervals on the outer surface of the roller, the brush heads extend into the glue box to dip in glue when the roller rotates through the hole, the brush heads include at least one brush head group, and one brush head group is used to apply glue to a battery.

[0006] In some embodiments, the brush head includes a plurality of brush head groups, and the plurality of brush head groups are arranged at intervals along the first direction, and each of the brush head groups is used for applying glue to a battery.

[0007] In some embodiments, a row of the pores is provided on the bottom surface of the glue box along a second direction, the second direction is perpendicular to the first direction, and the second direction is parallel to the bottom surface of the glue box.

[0008] In some embodiments, the pores extend along the first direction, and along the first direction, one pore corresponds to a plurality of the brush heads.

[0009] In some embodiments, one of the apertures corresponds to one of the brush heads.

[0010] In some embodiments, the length of the brush head in a direction perpendicular to the surface of the roller is 3 cm-6 cm.

[0011] In some embodiments, the portion of the bottom surface of the glue box that surrounds the pore is made of elastic material, and the area of ​​the pore is less than or equal to the area of ​​the brush head corresponding to the pore.

[0012] In some embodiments, the roller surface has a spacing area, the spacing area does not have the brush head, and the spacing area corresponds to the area between two adjacent battery cells.

[0013] According to some embodiments of the utility model, on the other hand, the embodiments of the utility model further provide a photovoltaic module, including: a battery string, wherein the battery string is formed by multiple battery cells connected by multiple conductive tapes, the surface of the battery cell is covered with multiple adhesive strips, the multiple adhesive strips are applied by the photovoltaic adhesive application device described in the above embodiments, each of the adhesive strips on the battery cell covers a partial area of ​​the conductive tape and a partial area of ​​the battery cell, and the surface of the adhesive strip is a non-flat surface; a packaging film, used to cover the surface of the battery string; a cover plate, used to cover the surface of the packaging film away from the battery string.

[0014] In some embodiments, the thickness of the adhesive strip is 30 μm-90 μm.

[0015] The technical solution provided by the embodiment of the utility model has at least the following advantages:

[0016] The photovoltaic glue application device provided by the embodiment of the utility model includes: a glue box for containing glue, and the bottom surface of the glue box has a hole that penetrates the bottom surface of the glue box; a roller, the roller is connected to the glue box, and the bottom surface of the glue box faces the roller, the roller rotates around the axis, and the roller extends along the first direction; a plurality of brush heads arranged at intervals on the outer surface of the roller, the brush heads extend into the glue box to dip in glue when the roller rotates through the hole, and the brush heads include at least one brush head group, and one brush head group is used to apply glue to a battery. The photovoltaic glue application device in the related art is generally a screen printing screen. When using the screen printing screen to apply glue to the battery, it is necessary to use a scraper to move close to the screen printing screen so that the glue can be printed on the surface of the battery. However, after printing a battery using the screen printing screen, if the next battery needs to be printed again, it is necessary to move the scraper back to the initial position first, and this return process does not apply glue, and the gluing efficiency is low. In addition, the use of screen printing screens for gluing has high requirements for glue and low adaptability to different glues. Since the screen holes on the screen printing screen are relatively fine and dense, the glue viscosity is relatively high and easily causes blockage. In addition, due to the force of the scraper, the screen printing screen used for a long time is prone to deformation, and the service life of the screen printing screen is relatively short. The photovoltaic gluing device provided by the utility model uses a roller with a brush head on the outer surface to apply glue to the battery, and it rotates continuously during the gluing process. For a brush head in the roller, during the rotation process, the brush head first passes through the pores on the bottom of the glue box to extend into the glue box to dip in glue. After dipping in glue, the brush head passes through the battery to print the glue onto the battery surface. Through the continuous rotation of the roller, the photovoltaic gluing device can continuously apply glue to the battery, and there is no need to return the scraper during screen printing, so the efficiency of gluing can be effectively improved. In addition, since the photovoltaic gluing device provided by the utility model can directly use a roller with a brush head to apply glue to the battery, there is no need to consider the problem of clogging of the screen printing screen, and the adaptability to different glues is high. Moreover, this photovoltaic gluing device is not easy to deform and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplified descriptions do not constitute a limitation on the embodiments. Unless otherwise specified, the pictures in the drawings do not constitute a scale limitation. In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the conventional technology, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of the structure of a photovoltaic glue application device provided by an embodiment of the utility model as viewed from the side in one direction;

[0019] Figure 2 A schematic diagram of the side structure of a photovoltaic glue application device provided by an embodiment of the utility model along another direction;

[0020] Figure 3 A schematic diagram of the bottom structure of a glue box in a photovoltaic glue application device provided by an embodiment of the utility model;

[0021] Figure 4 A schematic diagram of the bottom structure of a glue box in a photovoltaic glue application device provided by another embodiment of the utility model;

[0022] Figure 5 A schematic diagram of the bottom structure of a glue box in a photovoltaic glue application device provided by another embodiment of the utility model;

[0023] Figure 6 A schematic diagram of the side structure of a photovoltaic glue application device provided by another embodiment of the utility model along one direction;

[0024] Figure 7 A schematic structural diagram of the bottom surface of a glue box in a photovoltaic glue application device provided by another embodiment of the utility model;

[0025] Figure 8 A schematic structural diagram of the bottom surface of a glue box in a photovoltaic glue application device provided by another embodiment of the utility model;

[0026] Fig. 9 A schematic structural diagram of the bottom surface of a glue box in a photovoltaic glue application device provided by another embodiment of the utility model;

[0027] Fig.10 A schematic diagram of the side view of a roller in a photovoltaic glue application device provided by another embodiment of the utility model along one direction;

[0028] Fig.11 A schematic diagram of a photovoltaic glue application device provided by an embodiment of the utility model during glue application;

[0029] Fig.12 A schematic diagram of the structure of a photovoltaic module provided in one embodiment of the utility model;

[0030] Fig.13 A schematic diagram of a top view of a cell in a photovoltaic module provided by an embodiment of the utility model;

[0031] Fig.14 A schematic diagram of the side structure of a cell in a photovoltaic module along one direction provided by one embodiment of the utility model. DETAILED DESCRIPTION

[0032] As can be seen from the background technology, the current photovoltaic glue application device has the problem of low glue application efficiency.

[0033] In the related art, the photovoltaic gluing device used for gluing the battery cell is generally a screen printing screen. The screen printing screen has a plurality of graphic screen holes. When using the screen printing screen to gluing the battery, the screen printing screen needs to be placed on the battery and fixed in a certain manner, and the glue is placed on the screen printing screen. A scraper is used to lean against one side of the screen printing screen and move close to the screen printing screen so that the glue on the screen printing screen can be printed on the surface of the battery. At this time, the movement direction of the scraper is the first movement direction. However, after printing a battery using the screen printing screen, if the next battery needs to be printed, the scraper needs to be moved back to the initial position and then moved for the second time to apply glue. At this time, the scraper moves back to the initial position in the opposite direction of the first movement direction. In a production line with multiple gluing operations, the scraper needs to reciprocate along the first moving direction and in the opposite direction of the first moving direction. During the reciprocating motion of the scraper, glue is applied only when it moves along the first moving direction, and no glue is applied when the scraper moves in the opposite direction of the first moving direction. Moreover, only one battery can be printed at a time using a screen printing screen for gluing, and the gluing efficiency is low. In addition, the requirements for glue when using a screen printing screen for gluing are high, and the adaptability to different glues is low. Since the screen holes on the screen printing screen are relatively fine, once the viscosity of the glue is high, the screen printing screen is easily clogged. Moreover, due to the force applied by the scraper, the screen printing screen used for a long time is prone to deformation, and the service life of the screen printing screen is short.

[0034] The embodiment of the utility model provides a photovoltaic gluing device, including a glue box for containing glue, the bottom surface of the glue box has a hole that penetrates the bottom surface of the glue box; a roller is connected to the glue box, and the bottom surface of the glue box faces the roller, the roller rotates around the axis, and the roller extends along the first direction; a plurality of brush heads are arranged at intervals on the outer surface of the roller, and the brush heads extend into the glue box to dip in glue when the roller rotates through the hole, and the brush heads include at least one brush head group, and one brush head group is used to apply glue to a battery. In this way, the battery can be continuously and uninterruptedly glued using a roller with a brush head on the outer surface. The roller rotates continuously during the gluing process, and the efficiency of gluing can be effectively improved. In addition, the use of a roller with a brush head to apply glue to the battery does not need to consider the problem of screen clogging, and the adaptability to different glues is improved. Moreover, this photovoltaic gluing device is not easy to deform and has a long service life.

[0035] In order to make the purpose, technical scheme and advantages of the utility model clearer, the embodiments of the utility model will be described in detail below with reference to the accompanying drawings. However, it can be understood by those skilled in the art that in the embodiments of the utility model, many technical details are provided to enable readers to better understand the utility model. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed by the utility model can be realized.

[0036] Figure 1 A schematic diagram of the side view of a photovoltaic glue application device along one direction provided by an embodiment of the utility model, Figure 2 A schematic diagram of the side structure of a photovoltaic glue application device provided by an embodiment of the utility model along another direction, Figure 3 A schematic diagram of the bottom structure of a glue box in a photovoltaic gluing device provided in an embodiment of the utility model.

[0037] refer to Figures 1 to 3 The photovoltaic gluing device includes: a glue box 100, the glue box 100 is used to hold glue, and the bottom surface of the glue box 100 has a hole 101 that penetrates the bottom surface of the glue box 100; a roller 110, the roller 110 is connected to the glue box 100, and the bottom surface of the glue box 100 faces the roller 110, the roller 110 rotates around the axis, and the roller 110 extends along the first direction X; a plurality of brush heads 120, the plurality of brush heads 120 are arranged at intervals on the outer surface of the roller 110, the brush heads 120 extend into the glue box 100 to dip in glue when the roller 110 rotates through the hole 101, and the brush heads 120 include at least one brush head group 121, and one brush head group 121 is used to glue a battery.

[0038] The arrangement position of the brush heads 120 on the surface of the roller 110 in the photovoltaic glue application device is the same as the position of the area on the battery to be glued. The positions of multiple brush heads 120 in a brush head group 121 correspond to the positions of glue on a battery. And the size of each brush head 120 corresponds to the size of each glue area on the battery.

[0039] It should be noted that the drum 110 is a cylindrical rotatable tube structure, and the axis of the drum 110 is the axis of the cylinder, and the axis passes through the center of the circle of the side surface of the drum.

[0040] In addition, since the glue contained in the glue box 100 has a certain tension, the glue will not drip from the holes 101 on the bottom surface of the glue box 100 .

[0041] Figure 4 A schematic diagram of the bottom structure of a glue box in a photovoltaic gluing device provided in an embodiment of the utility model.

[0042] refer to Figure 4In some embodiments, a row of pores 101 is provided on the bottom surface of the glue box 100 along the second direction Y, the second direction Y is perpendicular to the first direction X, and the second direction Y is parallel to the bottom surface of the glue box 100. It can be understood that the second direction Y is the tangent direction of the rotation of the roller 110. The multiple brush heads 120 on the surface of the roller 110 can be divided into multiple rows of brush heads 120, and the multiple brush heads 120 in each row of brush heads 120 are arranged at intervals along the first direction X, and the multiple rows of brush heads 120 are arranged along the second direction Y. When the roller 110 rotates along the axis, a row of brush heads 120 dips in glue at the same time, and a row of brush heads 120 print glue on the battery at the same time. When there is only one row of pores 101 on the bottom surface of the glue box 100, only the row of brush heads 120 rotated to the top can extend into the pores 101 to dip in glue, that is, only the row of brush heads 120 rotated to the position closest to the glue box 100 can extend into the pores 101 to dip in glue, and the remaining rows of brush heads 120 are not located in the glue box 100. The brush heads 120 are only dipped in glue once before printing glue on the battery. In this way, the waste caused by dipping in glue multiple times can be avoided, glue can be saved, and the roller 110 can also rotate more smoothly, further improving the efficiency of photovoltaic glue application.

[0043] Figure 5 A schematic diagram of the bottom structure of a glue box in another photovoltaic gluing device provided in an embodiment of the utility model.

[0044] refer to Figure 5 In other embodiments, the bottom surface of the glue box 100 may also have multiple rows of pores 101 along the second direction Y. At this time, the multiple rows of brush heads 120 rotated to the top of the glue box can all extend into the pores 101 to dip in glue, and each row of glue can be glued to the battery after multiple times of dipping in glue. In this way, the glue dipped in the brush head can be more saturated, ensuring that each brush head 120 can dip in enough glue.

[0045] Figure 6 A schematic structural diagram of another photovoltaic glue application device provided in an embodiment of the utility model, viewed from the side along one direction.

[0046] refer to Figure 6 In some embodiments, the brush head 120 may include a plurality of brush head groups 121 , and the plurality of brush head groups 121 are arranged at intervals along the first direction X, and each brush head group 121 is used to apply glue to a battery. Figure 6The photovoltaic glue application device shown in the figure includes two brush head groups 121, and the two brush head groups 121 can apply glue to two batteries at the same time. The number of brush head groups 121 in the photovoltaic glue application device can also be greater than two, and multiple brush head groups 121 can apply glue to multiple batteries at the same time. In this way, the efficiency of photovoltaic glue application on the production line can be further improved, so that the efficiency of photovoltaic glue application is increased by two times or even multiple times, and the glue application of multiple batteries can be completed at the same time.

[0047] Figure 7 A schematic structural diagram of the bottom surface of a glue box in another photovoltaic gluing device provided in an embodiment of the utility model.

[0048] refer to Figure 4 as well as Figure 7 In some embodiments, the pore 101 may extend along the first direction X, and one pore 101 may correspond to multiple brush heads 120 along the first direction X. That is, when the brush head 120 in the drum 110 rotates to the pore 101 on the bottom surface of the glue box 100, multiple brush heads 120 in a row of brush heads 120 all extend into the same pore 101 to dip in glue. The length of this pore 101 along the first direction X is greater than the sum of the lengths of the multiple brush heads 120 extending into this pore 101 along the first direction X. Figure 4 , the pores 101 may correspond to all the brush heads 120 in a row of brush heads 120 along the first direction X, that is, the brush heads in a row arranged along the first direction X on the roller 110 may all extend into the same pore 101. Figure 7 The pores 101 may also correspond to a plurality of brush heads 120 in the same brush head group 121 in a row arranged along the first direction X, and the plurality of brush heads 120 in each brush head group 121 correspond to one pore 101, and the plurality of brush heads 120 in each brush head group 121 extend into the same pore 101. In this way, when one pore 101 corresponds to a plurality of brush heads 120, the number of pores 101 on the bottom surface of the glue box 100 is reduced, the alignment tolerance of the roller 110 and the glue box 100 is improved, and the stability of the glue application of the photovoltaic glue application device is improved. Even if there is a certain misalignment between the connection between the roller 110 and the glue box 100, the brush head 120 on the roller 110 can still extend into the pore 101 to dip in glue.

[0049] Figure 8 A schematic structural diagram of the bottom surface of a glue box in another photovoltaic gluing device provided in an embodiment of the utility model.

[0050] refer to Figure 8In some embodiments, one pore 101 may correspond to one brush head 120. When the brush heads 120 in the drum 110 rotate to the pores 101 on the bottom surface of the glue box 100, each brush head 120 extends into a corresponding pore 101, and only one brush head 120 extends into one pore 101. In this way, the bottom of the glue box 100 can have multiple pores 101, and the size of each pore 101 is greatly reduced, and the length of each pore 101 along the first direction X is only slightly greater than or equal to the length of one brush head 120 along the first direction X, so that the risk of glue dripping from the pores 101 is reduced.

[0051] Fig. 9 A schematic structural diagram of the bottom surface of a glue box in another photovoltaic gluing device provided in an embodiment of the utility model.

[0052] In some embodiments, the bottom surface of the part of the glue box 100 that encloses the pore 101 is an elastic material, and the area of ​​the pore 101 is less than or equal to the area of ​​the brush head 120 corresponding to the pore 101. When the bottom surface of the part of the glue box 100 that encloses the pore 101 is an elastic material, when the brush head 120 on the surface of the roller 110 rotates to the vicinity of the bottom surface of the glue box 100, the elastic material will be squeezed, so that the elastic material is deformed in the direction away from the roller 110, that is, the elastic material is deformed toward the inside of the glue box 100, and the brush head 120 can extend into the pore 101 to dip in glue by squeezing the elastic material around the pore. At this time, the area of ​​the pore 101 does not need to be greater than the area of ​​the brush head that extends into the pore 101, and the area of ​​the pore 101 can be less than or equal to the area of ​​the corresponding brush head 120. Even if the area of ​​the pore 101 is smaller than the area of ​​the brush head 120, the brush head 120 can still extend into the pore 101 to dip in glue by squeezing the elastic material around the pore 101. Furthermore, when the area of ​​the pore 101 is less than or equal to the area of ​​the brush head 120 corresponding to the pore 101 , the area of ​​the pore 101 is small, and the risk of the glue in the glue box 100 dripping from the pore 101 can be effectively reduced.

[0053] In other embodiments, when the bottom surface of the portion of the glue box 100 that encloses the pore 101 is made of elastic material, the area of ​​the pore 101 can be larger than the area of ​​the corresponding brush head 120, the width of the pore 101 along the second direction Y can be smaller than the width of the brush head 120 along the second direction Y, and the length of the pore 101 along the first direction X can also be smaller than the length of the brush head 120 along the first direction X. The area of ​​the pore 101 can still be made smaller, so that the risk of the glue in the glue box 100 dripping from the pore 101 is effectively reduced.

[0054] In some embodiments, the elastic material of the bottom surface of the portion of the glue box 100 that surrounds the pore 101 may be a rubber material or the like.

[0055] In some embodiments, the length of the brush head 120 may be 3 cm to 6 cm in a direction perpendicular to the surface of the drum 110. For example, in a direction perpendicular to the surface of the drum 110, the length of the brush head 120 may be 3 cm, 4 cm, 5 cm or 6 cm. If the length of the brush head 120 is too long, the brush head 120 may be deformed to a large extent when applying glue to the battery, and the area of ​​glue printed by the brush head 120 on the battery surface may be too large, thereby affecting the quality of gluing and making it difficult to accurately control the range of the gluing area; if the length of the brush head 120 is too short, the brush head 120 may be able to dip too little glue in the glue box 100, and the brush head 120 prints too little glue on the battery, making it difficult to achieve a better fixing effect, and the gluing quality is still low. Therefore, in the direction perpendicular to the surface of the roller 110, the length of the brush head 120 needs to be selected within a suitable range. When the length of the brush head 120 is 3cm-6cm, it can not only accurately control the range of the gluing area, but also apply sufficient glue on the battery surface, effectively improving the gluing quality of the photovoltaic gluing device.

[0056] In some embodiments, a brush head 120 can be an integral structure. For example, a brush head 120 can be a piece of rubber, or a brush head 120 can be a piece of sponge. When a brush head 120 is used as an integral structure to apply glue to a battery, the glue area applied by the brush head 120 on the battery surface can be roughly the same as the area corresponding to the brush head 120. The deformation of the brush head 120 during the gluing process is small, which helps to improve the accuracy of the glue application area control of the photovoltaic gluing device.

[0057] In other embodiments, a brush head 120 may be composed of a cluster of bristles, that is, a brush head 120 may include multiple bristles. Multiple bristles constitute a brush head 120. When using such a brush head 120 composed of bristles for gluing, the brush head 120 can dip more glue in the glue box 100, and the gaps between the multiple bristles can store more glue, so that the brush head 120 prints more glue on the battery surface, which can have a better fixing effect and improve the gluing quality.

[0058] In some embodiments, when a brush head 120 is composed of a cluster of bristles, the bristles may be plastic filaments.

[0059] Fig.10 A schematic structural diagram of a side view of a roller along one direction in another photovoltaic glue application device provided in an embodiment of the utility model.

[0060] refer to Fig.10In some embodiments, the surface of the roller 110 may have a spacing area 111, and the spacing area 111 does not have a brush head 120, and the spacing area 111 corresponds to the area between two adjacent battery cells. When the battery is actually glued, it is necessary to apply glue to each battery cell in the battery string, and the roller 110 may not stop rotating during the process of gluing the entire battery string, and continue to apply glue to the battery string. The purpose of applying glue is to make the connection between the battery cell and the conductive tape more stable. There is a certain gap between the two battery cells in the battery string, and this gap does not actually need to be glued. Therefore, the present disclosure provides a spacing area 111 on the surface of the roller 110. When the roller 110 rotates continuously, the spacing area 111 in the roller 110 corresponds to the gap area between the two battery cells, and the area with the brush head 120 on the roller 110 corresponds to the area on the surface of the battery cell. That is to say, the roller 110 can pass through the gap between a cell and two adjacent cells in one rotation, the circumference of the roller 110 is equal to the sum of the length of a cell in the cell string along the extension direction of the cell string and the length of the gap between the two cells, and the arc length of the spacing area 111 is equal to the length of the gap between the two cells. In this way, when the glue is not applied between the two cells, the roller 110 can be ensured to keep rotating during the gluing process, realizing a continuous and uninterrupted gluing process, while taking into account the gluing quality and improving the gluing efficiency.

[0061] Fig.11 A schematic diagram of a photovoltaic glue applying device provided in an embodiment of the utility model during glue applying.

[0062] refer to Fig.11 In some embodiments, when the photovoltaic glue application device provided by the embodiment of the utility model is used to apply glue to the battery, multiple battery cells in the battery string can be placed on a conveyor belt, and the photovoltaic glue application device can be fixed. The operation of the conveyor belt and the rotation of the roller 110 can be coordinated to achieve the gluing process of the photovoltaic glue application device. In other embodiments, a moving device can also be provided on the photovoltaic glue application device, so that the photovoltaic glue application device moves along the extension direction of the battery string, and the photovoltaic glue application device moves along the tangential direction of the rotation of the roller 110. The movement of the photovoltaic glue application device and the rotation of the roller 110 can be coordinated to achieve the gluing process of the photovoltaic glue application device.

[0063] The photovoltaic glue application device provided by the embodiment of the utility model includes a glue box for containing glue, and the bottom surface of the glue box has a hole that penetrates the bottom surface; the roller is connected to the glue box, and the bottom surface of the glue box faces the roller, the roller rotates around the axis, and the roller extends along the first direction; a plurality of brush heads are arranged at intervals on the outer surface of the roller, and the brush heads extend into the glue box to dip in glue when the roller rotates into the hole, and the brush heads include at least one brush head group, and one brush head group is used to apply glue to a battery. In this way, the battery is glued using a roller with a brush head on the outer surface, and the roller rotates continuously during the gluing process. The photovoltaic glue application device can continuously apply glue to the battery, and the gluing efficiency can be effectively improved. In addition, the photovoltaic glue application device will not be blocked by glue with high viscosity, the photovoltaic glue application device has a high adaptability to different glues, and the photovoltaic glue application device is not easy to deform and has a long service life.

[0064] Correspondingly, another embodiment of the utility model further provides a photovoltaic module, and the photovoltaic module provided by another embodiment of the utility model is glued by the above-mentioned photovoltaic glue application device. The photovoltaic glue application device provided by another embodiment of the utility model will be described in detail below in conjunction with the accompanying drawings. For the parts that are the same or corresponding to the previous embodiment, reference can be made to the corresponding description of the previous embodiment, and will not be described in detail below.

[0065] Fig.12 A schematic diagram of the structure of a photovoltaic module provided by an embodiment of the utility model, Fig.13 A schematic diagram of a top view of a cell in a photovoltaic module provided by an embodiment of the utility model. Fig.14 A schematic diagram of the side view structure of a cell in a photovoltaic module along one direction provided by an embodiment of the utility model.

[0066] refer to Figure 12 to Figure 14 The photovoltaic module includes: a battery string, which is formed by connecting multiple battery cells 200 via multiple conductive tapes 210. The surface of the battery cell 200 is covered with multiple adhesive strips 220. The multiple adhesive strips 220 are applied by the photovoltaic adhesive application device described in the above embodiment. Each adhesive strip 220 located on the battery cell 200 covers a partial area of ​​the conductive tape 210 and a partial area of ​​the battery cell 201. The surface of the adhesive strip 220 is a non-flat surface; an encapsulation film 230, which is used to cover the surface of the battery string; and a cover plate 240, which is used to cover the surface of the encapsulation film 230 away from the battery string.

[0067] Since the photovoltaic glue application device prints the glue dipped in the brush head 120 onto the battery by rotating the roller to apply glue, compared with applying glue by a scraper using a screen printing screen, the surface of the glue strip 220 applied by the photovoltaic glue application device provided by the embodiment of the present disclosure on the surface of the battery cell 200 is a non-flat surface. The glue strip 220 with a non-flat surface can reflect light in all directions, improve the utilization rate of light by the battery cell, and improve the photoelectric conversion efficiency of the battery cell to a certain extent, thereby improving the photoelectric conversion efficiency and performance of the photovoltaic module.

[0068] In some embodiments, the surface of the adhesive strip 220 may have a corrugated structure. It is understood that the surface morphology of the adhesive strip 220 may correspond to the surface morphology of the brush head 120.

[0069] In some embodiments, the cell 200 in the cell string can be a Passivated Emitter Rear Cell (PERC), a Tunnel Oxide Passivated Contact (TOPCon), an intrinsic thin film heterojunction cell (HJT), an interdigitated back contact cell (IBC), etc.

[0070] The packaging film 230 is used to bond the battery string to the cover plate 240. In some embodiments, the material of the packaging film 230 may include EVA, POE, PVB, etc. The packaging film 230 can protect the battery string, prevent the external environment from affecting the performance of the battery string, and has a certain bonding strength.

[0071] In some embodiments, the cover plate 240 may be made of glass. Glass has a low water permeability, and the use of the glass cover plate 240 can effectively prevent water vapor in the external environment from entering the photovoltaic module through the cover plate 240, thereby reducing the corrosion of the battery string by water vapor and reducing the hydrolysis of the packaging film 230 by water vapor, which can improve the service life of the photovoltaic module to a certain extent.

[0072] In other embodiments, the material of the cover plate 240 may also be an organic polymer material.

[0073] In some embodiments, the thickness of the adhesive strip 220 may be 30 μm-90 μm. For example, the thickness of the adhesive strip 220 may be 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm or 90 μm, etc. The thickness of the adhesive strip 220 is the maximum thickness of the adhesive strip 220 in the direction perpendicular to the surface of the battery cell 200. If the thickness of the adhesive strip 220 is too large, the thickness of the adhesive strip 220 in the photovoltaic module is large, and the adhesive strip 220 will occupy a certain space of the packaging film 230, so that the thickness of the packaging film 230 in the area where the adhesive strip 220 is set is too small, resulting in uneven stress of the photovoltaic module and poor stability of the photovoltaic module; if the thickness of the adhesive strip 220 is too small, the adhesive strip 220 has a poor fixing effect on the conductive tape 210 and the battery cell. Therefore, the thickness of the adhesive strip 220 needs to be selected within a suitable range. When the thickness of the adhesive strip 220 is 30 μm-90 μm, it can ensure that the packaging film 230 has a greater thickness and improve the stability of the photovoltaic module, and also enable the adhesive strip 220 to have a better fixing effect on the battery cell 200 and the conductive tape 210.

[0074] It should be noted that, since the adhesive strip 220 in the photovoltaic module provided by the embodiment of the present disclosure is applied by the above-mentioned photovoltaic adhesive application device, the roller 110 with a brush head 120 on the surface is used to apply adhesive to the battery. Compared with using a screen printing screen for adhesive application, scraping the glue onto the inside of the patterned screen with a scraper, the adhesive strip 220 applied by the roller 110 has a smaller thickness, which is more conducive to preventing the adhesive strip 220 from occupying the space of the packaging film 230, and can ensure that the packaging film 230 in the area of ​​the adhesive strip 220 also has a large thickness, which will not cause uneven stress in the photovoltaic module, and improve the stability of the photovoltaic module.

[0075] The photovoltaic module provided by the embodiment of the utility model includes a battery string, which is formed by connecting multiple battery cells via multiple conductive strips, and the surface of the battery cell is covered with multiple adhesive strips, which are applied by the photovoltaic adhesive application device described in the above embodiment, and each adhesive strip located on the battery cell covers a part of the conductive strip and a part of the battery cell, and the surface of the adhesive strip is a non-flat surface; a packaging adhesive film is used to cover the surface of the battery string; and a cover plate is used to cover the surface of the packaging adhesive film away from the battery string. In this way, the surface of the adhesive strip applied by the photovoltaic adhesive application device described in the above embodiment is a non-flat surface, which can improve the reflection of the adhesive strip to light, improve the utilization rate of the battery to light, and thus improve the utilization rate of the photovoltaic module to light.

[0076] Those skilled in the art can understand that the above-mentioned embodiments are specific examples of the present invention, and in practical applications, various changes can be made to the embodiments in form and detail without departing from the spirit and scope of the present invention. Any person skilled in the art can make their own changes and modifications without departing from the spirit and scope of the present invention, so the protection scope of the present invention shall be based on the scope defined in the claims.

Claims

1. A photovoltaic glue application device, characterized in that: include: A glue box, the glue box is used to contain glue, and the bottom surface of the glue box has a hole that penetrates the bottom surface of the glue box; A roller, the roller is connected to the glue box, and the bottom surface of the glue box faces the roller, the roller rotates around an axis, and the roller extends along a first direction; A plurality of brush heads are arranged at intervals on the outer surface of the drum. When the brush heads rotate with the drum and pass through the pores, they extend into the glue box to dip into the glue. The brush heads include at least one brush head group, and one brush head group is used to apply glue to a battery.

2. The photovoltaic glue application device according to claim 1, characterized in that: The brush head includes a plurality of brush head groups, and the plurality of brush head groups are arranged at intervals along the first direction, and each of the brush head groups is used for applying glue to a battery.

3. The photovoltaic glue application device according to claim 1, characterized in that: A row of the holes is provided on the bottom surface of the glue box along a second direction, the second direction is perpendicular to the first direction, and the second direction is parallel to the bottom surface of the glue box.

4. The photovoltaic glue application device according to claim 1 or 3, characterized in that: The pores extend along the first direction, and along the first direction, one pore corresponds to a plurality of the brush heads.

5. The photovoltaic glue application device according to claim 1 or 3, characterized in that: One of the pores corresponds to one of the brush heads.

6. The photovoltaic glue application device according to claim 1, characterized in that: In a direction perpendicular to the surface of the roller, the length of the brush head is 3 cm-6 cm.

7. The photovoltaic glue application device according to claim 1, characterized in that: The portion of the bottom surface of the glue box that surrounds the pore is made of elastic material, and the area of ​​the pore is less than or equal to the area of ​​the brush head corresponding to the pore.

8. The photovoltaic glue application device according to claim 1, characterized in that: The roller surface has a spacing area, the spacing area does not have the brush head, and the spacing area corresponds to the area between two adjacent battery sheets.

9. A photovoltaic module, characterized in that: include: A battery string, wherein the battery string is formed by connecting a plurality of battery cells via a plurality of conductive tapes, the surface of the battery cell is covered with a plurality of adhesive strips, the plurality of adhesive strips are applied by a photovoltaic adhesive application device as claimed in any one of claims 1 to 8, each of the adhesive strips on the battery cell covers a portion of the conductive tape and a portion of the battery cell, and the surface of the adhesive strip is a non-flat surface; A packaging film, used to cover the surface of the battery string; The cover plate is used to cover the surface of the packaging film facing away from the battery string.

10. The photovoltaic module according to claim 9, characterized in that: The thickness of the adhesive strip is 30 μm-90 μm.

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