CN116470839A - Foldable and easy-to-storage flexible photovoltaic system - Google Patents

Abstract

The invention provides a flexible photovoltaic system which can be folded and stored underground. The photovoltaic system comprises a light flexible photovoltaic module, a photovoltaic module accommodating groove, two groups of lifting support mounting frames, two groups of folding and unfolding mechanisms and mounting frame accommodating grooves, wherein the photovoltaic module accommodating groove is positioned at the end parts of the two mounting frame accommodating grooves and is communicated with the two mounting frame accommodating grooves; each group of folding and releasing mechanisms comprises a traction rope, a first winding mechanism and a second winding mechanism which are respectively arranged at two ends of the cross beam; the light flexible photovoltaic module is provided with a plurality of supporting rollers along the length direction, the supporting rollers are erected on the cross beam, a first supporting roller close to one end of the photovoltaic module storage groove is fixed on the cross beam, and two ends of a second supporting roller far away from one end of the photovoltaic module storage groove are respectively fixed on traction ropes of the two groups of folding and unfolding mechanisms. The photovoltaic module is designed to be foldable, can be folded, retracted and protected, reduces the corrosion time and avoids the damage of the module by strong wind.

Description

Foldable and easy-to-storage flexible photovoltaic system

technical field

The invention relates to the technical field of solar panels, in particular to a foldable and easy-to-store flexible photovoltaic system.

technical background

Photovoltaic module refers to the smallest indivisible photovoltaic cell combination device with packaging and internal connection, which can provide DC output alone, and generally refers to solar cell components. At present, most of the flat-panel photovoltaic modules with aluminum alloy frame are on the market, occupying most of the photovoltaic power generation market with mature technology and low cost. However, flat-panel photovoltaic modules with aluminum alloy frames also have their limitations. For example, the larger mass requires greater load-bearing requirements for the installation site, and the non-foldability after installation makes them exposed to the environment for a longer period of time. Dust accumulation affects power generation efficiency when not working at night.

However, the existing lightweight flexible photovoltaic modules make up for the shortcomings of flat-plate photovoltaic modules with aluminum alloy frames due to their advantages of light weight, bendability, and more flexible installation. Utilizing the lightness of lightweight flexible photovoltaic modules can greatly reduce the cost of supports, and can be used on roofs with weak bearing capacity. Utilizing the bendability of lightweight and flexible photovoltaic modules, it can be integrated with irregular roofs such as fusion curved surfaces and circular surfaces throughout the United States. However, the existing lightweight flexible photovoltaic modules cannot be folded and stored after laying, and have been exposed to the outside for a long time. Due to the relatively light weight of photovoltaic flexible modules, they are prone to damage in heavy wind and heavy rain, reducing their service life.

Contents of the invention

The purpose of the present invention is to provide a foldable and easy-to-store flexible photovoltaic system to solve the problem that the existing photovoltaic modules cannot be folded and stored. The photovoltaic system can fold the photovoltaic modules during the time period when the photovoltaic modules are not working or are not easy to work, and store them in a storage box for protection, so as to reduce the time of corrosion and prevent the components from being destroyed by strong winds.

In order to solve the above technical problems, the present invention provides a flexible photovoltaic system that can be folded and stored underground. The photovoltaic system includes a mounting frame, a lightweight flexible photovoltaic module, a folding mechanism, a photovoltaic module storage slot, and a mounting frame storage slot. The mounting frame includes two sets of lifting brackets arranged symmetrically. The lifting support rod of the bracket is installed in the storage groove of the mounting frame, and when the lifting support rod is contracted, each group of lifting brackets is placed in the corresponding mounting frame storage groove, and the photovoltaic module storage groove is located at the end of the two mounting frame storage grooves and communicates with the two mounting frame storage grooves;

The folding retractable mechanism is provided with two groups, which are arranged symmetrically on the crossbeams of the two groups of lifting brackets. Each group of folding retractable mechanisms includes a traction rope and a first winding mechanism and a second winding mechanism respectively arranged at both ends of the crossbeam. One end of the traction rope is wound on the winding roller of the first winding mechanism, and the other end is wound on the winding roller of the second winding mechanism. Traction rope; the lightweight flexible photovoltaic module is provided with a plurality of support rollers along the length direction, and the light flexible photovoltaic module is erected on the crossbeams of two sets of lifting brackets through a plurality of support rollers, wherein the first support roller near the end of the storage groove of the photovoltaic module is fixed on the crossbeam, and the two ends of the second support roller away from the end of the storage groove of the photovoltaic module are respectively fixed on the traction ropes of the two sets of folding retractable mechanisms, and the two ends of the multiple third support rollers between the first support roller and the second support roller are slidingly connected with the crossbeams of the two groups of lifting supports; The movement of the roller and the third supporting roller realizes the folding or unfolding of the lightweight and flexible photovoltaic module.

The preferred technical solution of the present invention: the top surface of the opposite side of the beam is correspondingly provided with a chute, the two ends of the first support roller, the second support roller and the third support roller are all placed in the chute, and the two ends of the first support roller are fixed on the end of the chute adjacent to the photovoltaic module storage groove, the two ends of the second support roller and the third support roller are both slidably connected with the chute, the traction rope is set at a position higher than the crossbeam, and the second support roller is fixedly connected with the traction rope through a fixed suspension rope or a suspension rod, and drives the second support roller to slide on the crossbeam when the traction rope moves Sliding in the groove.

The preferred technical solution of the present invention: the lightweight flexible photovoltaic module is a whole piece of photovoltaic module, the photovoltaic module is packaged with a plurality of flexible solar cells and conductive lines, and the current of the lightweight flexible photovoltaic module is output from one end adjacent to the storage groove of the photovoltaic module; the width of the lightweight flexible photovoltaic module matches the distance between the two sets of lifting support beams, and the length is smaller than the length of the beam; the first support roller, the second support roller and the plurality of third support rollers are equidistantly distributed along the length direction of the lightweight flexible photovoltaic module; The distance between them is 1.5-2m, which maximizes the supporting role of the supporting rollers on the lightweight and flexible photovoltaic modules, reduces the number of supporting rollers used, and reduces costs.

The preferred technical solution of the present invention: both the first and second winding mechanisms use electric motors, the winding rollers of which are installed on the output shafts of the motors, and the traction ropes of the two sets of folding and unwinding mechanisms are always parallel to each other and to the beam.

The excellent technical solution of the present invention: The lifting bracket includes two lifting support rods. The two lift support rods are located at the bottom of the beams. Each lifting rod uses a hydraulic or electric telescopic rod; In the state of completely contraction, the lift bracket and the folding collection mechanism above the beam of the lifting bracket are placed in the storage groove of the installation frame, and there is a cover protective cover at the groove of each installation frame.

The preferred technical solution of the present invention: the lightweight flexible photovoltaic module adopts a light-weight thin-film photovoltaic module that can be bent and flattened, the depth of the photovoltaic module storage groove is greater than the overall height of the light flexible photovoltaic module in the folded state, and the width is greater than the overall width of the lightweight flexible photovoltaic module in the folded state, and when the lifting bracket is fully contracted, the folded lightweight flexible photovoltaic module is stored in the photovoltaic module storage groove, and a shielding cover is provided on the opening of the photovoltaic module storage groove.

The preferred technical solution of the present invention: the lightweight flexible photovoltaic module is V-shaped after being folded, and the support roller is located on the midpoint line connecting two adjacent V-shapes.

The preferred technical solution of the present invention: the first winding mechanism and the second winding mechanism of the group folding and unwinding mechanism are synchronously controlled by the same control circuit; the winding rollers of the four groups of winding mechanisms have the same rotation direction and speed, and they rotate clockwise or counterclockwise at the same time, so that the two traction ropes are synchronously wound on the winding rollers of the two first winding mechanisms or the winding rollers of the two second winding mechanisms, so that the two traction ropes drive the second supporting roller to move to the right or left, thereby realizing the unfolding or folding of the lightweight flexible photovoltaic module.

The preferred technical solution of the present invention: in order to reduce the labor cost of controlling the day and night switch of the motor, the lifting support rod, the first winding mechanism and the second winding mechanism are all provided with a manual control switch, a photosensitive control switch and a wind sensor control switch.

The preferred technical solution of the present invention: the flexible photovoltaic system is provided with a control system, and when the light intensity is less than 200W/m², the first winding mechanism and the second winding mechanism do not rotate, and the lightweight flexible photovoltaic module is placed in the storage slot;², the photosensitive control switch is turned on, the lifting support rod is extended to the set height, the first winding mechanism and the second winding mechanism rotate clockwise, and the light flexible photovoltaic module is unfolded and starts to generate electricity; when the flexible photovoltaic module is unfolded, the light intensity is reduced to less than 200W/m², the photosensitive control switch is turned on, the first winding mechanism and the second winding mechanism rotate counterclockwise, the lightweight flexible photovoltaic module is folded, and the lifting support rod shrinks and falls into the storage slot of the installation frame. Afterwards, the lightweight and flexible photovoltaic modules are stored in the photovoltaic module storage tank; when there is no wind speed greater than 5m/s within 30 minutes and the light intensity is greater than 200W/m², the wind sensor controller turns on the control switch, the lowering support rod is extended to the set height, the first winding mechanism and the second winding mechanism rotate clockwise, and the lightweight flexible photovoltaic module is unfolded and starts to generate electricity.

The foldable lightweight flexible photovoltaic module of the present invention is light in weight, has low requirements on supports, and can reduce costs. In addition, the foldable lightweight flexible photovoltaic module of the present invention can be folded up and stored to protect and reduce corrosion when no power is generated at night or in severe weather such as strong winds and heavy rains; therefore, the modules can be stored underground, freeing up space for other uses.

Beneficial effects of the present invention: the present invention utilizes the light weight and bendable advantages of lightweight flexible photovoltaic modules, which can be perfectly integrated with irregular roofs such as fused curved surfaces and circular surfaces, and the photovoltaic modules are designed in a foldable form, and can be folded during nights, rainy days, windy weather and other time periods when the photovoltaic modules are not working or are not easy to work, and stored in storage boxes for protection, reducing the time for corrosion, and avoiding strong winds from destroying the components. The invention has strong application type, high compatibility with industrial factory tent buildings, and can be folded and stored, which reduces the exposure time of photovoltaic modules to the environment and improves the service life of photovoltaic modules. The system can be used in all areas, and has more advantages in areas with strong coastal winds.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of a photovoltaic module of the present invention in a fully expanded state;

Fig. 2 is a schematic diagram of the installation of the flexible photovoltaic module and the mounting frame in the present invention;

Fig. 3 is a front view of the fully expanded state of the photovoltaic module of the present invention;

Fig. 4 is a government view when the photovoltaic module of the present invention is fully expanded;

Fig. 5 is a front view during the folding process of the photovoltaic module of the present invention;

Fig. 6 is a top view during the folding process of the photovoltaic module of the present invention;

Fig. 7 is a front view of the folded photovoltaic module of the present invention;

Fig. 8 is a structural schematic diagram of the folded and stored photovoltaic module of the present invention;

Fig. 9 is a schematic diagram of the elevating support rod of the present invention in an extended state;

Fig. 10 is a schematic diagram of the lifting support rod of the present invention in a contracted state;

Fig. 11 is a schematic diagram of the motor rotation direction when controlling the folding of the photovoltaic module of the present invention;

Fig. 12 is a schematic diagram of the rotation direction of the motor when controlling the deployment of the photovoltaic module of the present invention;

Fig. 13 is a block diagram of the photovoltaic module folding control principle in the present invention.

In the figure: 1—lifting support rod, 2—photovoltaic module storage slot, 3—beam, 4—second winding mechanism, 5—traction rope, 6—first support roller, 7—light flexible photovoltaic module, 8—mounting rack storage slot, 9—second support roller, 10—third support roller, 11—first winding mechanism.

Detailed ways

The present invention will be further described below in conjunction with drawings and embodiments. Accompanying drawings 1 to 13 are all drawings of the embodiments, drawn in a simplified manner, and are only used for the purpose of clearly and concisely illustrating the embodiments of the present invention. The following technical solutions shown in the drawings are specific solutions of the embodiments of the present invention, and are not intended to limit the scope of the claimed invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "left", "right" and so on are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is usually placed when the product of the invention is used, or the orientation or positional relationship that is commonly understood by those skilled in the art. construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise specified and limited, terms such as "setting" and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, or it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

The embodiment provides a flexible photovoltaic system that can be folded and stored underground. As shown in FIGS. 1 to 12 , the photovoltaic system includes a mounting frame, a lightweight flexible photovoltaic module 7 , a folding mechanism, a photovoltaic module storage slot 2 and a mounting frame storage slot 8 . The mounting frame storage groove 8 is provided with two, respectively located at the bottom of the two groups of lifting brackets, the length of each mounting frame storage groove 8 is greater than or equal to the overall length of the lifting bracket, the lifting support rod 1 of each group of lifting brackets is installed in the mounting frame storage groove 8, and in the contracted state of the lifting support rod 1, each group of lifting brackets is placed in the corresponding mounting frame storage groove 8, the photovoltaic module storage groove 2 is located at the end of the two mounting frame storage grooves 8, and communicated with the two mounting frame storage grooves 8; the height of the mounting frame storage groove 8 is greater than or equal to the lift The height of the fully retracted state of the support is greater than the width of the widest part of the crossbeam 3 and the winding mechanism, and in the fully retracted state of the elevating support, the elevating support and the folding and retracting mechanism positioned above the elevating support crossbeam are all placed in the mounting rack storage groove 8, and a shielding cover can also be provided at the notch of each mounting rack storage groove 8. The lightweight flexible photovoltaic module 7 adopts a light-weight thin-film photovoltaic module that can be bent and flattened. The depth of the photovoltaic module storage groove 2 is greater than the overall height of the lightweight flexible photovoltaic module 7 in the folded state, and the width is larger than the overall width of the lightweight flexible photovoltaic module 7 in the folded state. When the lifting bracket is fully contracted, the folded lightweight flexible photovoltaic module 7 is stored in the photovoltaic module storage groove 2, and the opening of the photovoltaic module storage groove 2 is equipped with a shielding cover. The shielding protection cover of the receiving slot 8 of the mounting frame and the opening of the receiving slot 2 of the photovoltaic module can be set to be automatic, which will be automatically closed after the mounting frame and the photovoltaic module are retracted, or it can be set to be manual, and the cover can be controlled manually.

The embodiment provides a flexible photovoltaic system that can be folded and stored underground. As shown in FIGS. The first winding mechanism 11 and the second winding mechanism 4 are synchronously controlled by the same control circuit, and when the first winding mechanism 11 rotates the winding traction rope 5, the second winding mechanism 4 rotates synchronously to release the traction rope 5 on its winding roller; 9 moves to the right or left, so as to realize the unfolding or folding of the light and flexible photovoltaic module 7. Both the first winding mechanism 11 and the second winding mechanism 4 adopt electric motors, and their winding rollers are installed on the output shaft of the motor.

The embodiment provides a flexible photovoltaic system that can be folded and stored underground. As shown in FIGS. 1 to 11 , the lightweight flexible photovoltaic module 7 is provided with a plurality of support rollers along the length direction. The lightweight flexible photovoltaic module 7 is erected on the beams 3 of two sets of lifting brackets through a plurality of support rollers. The first support roller 6 near the end of the photovoltaic module storage groove 2 is fixed on the beam 3, and the two ends of the second support roller 9 away from the photovoltaic module storage groove 2 are respectively fixed on the traction ropes 5 of the two sets of folding and retracting mechanisms. 6 and the second support roller 9, both ends of multiple third support rollers 10 are slidingly connected to the crossbeams 3 of two sets of lifting brackets; the lightweight flexible photovoltaic module 7 is a whole piece of photovoltaic module, and the interior of the photovoltaic module is packaged with a plurality of flexible solar cells and conductive lines, and the current of the lightweight flexible photovoltaic module is output from one end adjacent to the storage groove 2 of the photovoltaic module; 0 are equidistantly distributed along the length direction of the lightweight flexible photovoltaic module 7; when the lightweight flexible photovoltaic module is unfolded, the distance between two adjacent supporting rollers is 1.5-2m, so as to maximize the supporting role of the supporting rollers on the lightweight flexible photovoltaic module, reduce the number of supporting rollers used, and reduce costs. The top surface of the opposite side of the crossbeam 3 is correspondingly provided with a chute, the two ends of the first support roller 6, the second support roller 9 and the third support roller 10 are all placed in the chute, and the two ends of the first support roller 6 are fixed on the end of the chute adjacent to the photovoltaic module storage tank 2, the two ends of the second support roller 9 and the third support roller 10 are slidingly connected with the chute, the traction rope 5 is arranged at a position higher than the crossbeam 3, the second support roller 9 is fixedly connected with the traction rope 5 through a fixed suspension rope or boom, and drives the second traction rope 5 when moving. Support roller 9 slides in the chute on the beam. During the moving process of the traction rope 5, the second support roller 9 and the third support roller 10 are driven to move to realize the folding or unfolding of the lightweight and flexible photovoltaic module 7 . The lightweight and flexible photovoltaic module 7 is V-shaped after being folded, and the support roller is located on the midpoint line connecting two adjacent V-shaped.

In order to reduce the labor cost of controlling the day and night switch of the motor, the lifting support rod 1, the first winding mechanism 11 and the second winding mechanism 4 are all provided with a manual control switch, a photosensitive control switch and a wind-sensing control switch; the flexible photovoltaic system is also provided with a control system, which controls the photosensitive control switch and the wind-sensing control switch through the control system to realize automatic control of the entire device. The control process is when the light intensity is less than 200W/m², the first winding mechanism 11 and the second winding mechanism 4 do not rotate, and the lightweight flexible photovoltaic module 7 is placed in the storage slot 8; when the light intensity is greater than 200W/m², the photosensitive control switch is turned on, the lifting support rod 1 is extended to the set height, the first winding mechanism 11 and the second winding mechanism 4 rotate clockwise, and the light flexible photovoltaic module 7 is unfolded and starts to generate electricity; when the flexible photovoltaic module 7 is unfolded, the light intensity is reduced to less than 200W/m², the photosensitive control switch is turned on, the first winding mechanism 11 and the second winding mechanism 4 rotate counterclockwise, the lightweight flexible photovoltaic module 7 is folded, and the lifting support rod 1 shrinks and falls into the storage slot 8 of the installation frame, and the light flexible photovoltaic module 7 is stored in the photovoltaic module storage groove 2 after folding; when the flexible photovoltaic module 7 is unfolded, when the wind speed is greater than 5m/s, the wind sensor control switch is turned on, the first winding mechanism 11 and the second winding mechanism 4 rotate counterclockwise, fold the lightweight flexible photovoltaic module 7, and lift The support rod 1 shrinks and descends into the storage slot 8 of the installation frame, and the lightweight and flexible photovoltaic module 7 is stored in the storage slot 2 after folding; when there is no wind speed greater than 5m/s within 30 minutes and the light intensity is greater than 200W/m², the wind sensor control switch is turned on, the lowering support rod 1 is extended to a set height, the first winding mechanism 11 and the second winding mechanism 4 rotate clockwise, and the light and flexible photovoltaic module 7 is unfolded to start generating electricity.

The more the number of the third supporting rollers in the embodiment, the larger the unfolded area of the lightweight flexible photovoltaic module, the more battery sheets it contains, and the stronger the power generation capacity. The lightweight flexible photovoltaic module is a whole photovoltaic module, and a plurality of flexible solar cells and conductive lines are packaged inside the photovoltaic module, and the current of the lightweight flexible photovoltaic module is output from the end of the assembly.

The installation steps of the flexible photovoltaic system that can be folded and stored underground in this embodiment are as follows:

S1. First, according to the size of the installation frame and the foldable lightweight flexible photovoltaic module, construct the photovoltaic module storage slot 2 and the installation rack storage slot 8 to ensure that the photovoltaic module storage slot 2 can completely accommodate the folded lightweight flexible photovoltaic module 7, and the installation frame storage slot 8 can completely retract the lowered installation frame;

S2. Install the lifting support rod 1, the two ends of the crossbeam 3 are erected on the top of each group of lifting support rods 1 respectively, and the first winding mechanism 11 and the second winding mechanism 4 are respectively installed at the two ends of each crossbeam 3; the first winding mechanism 11 and the second winding mechanism 4 are synchronized and rotate in the same direction;

S4 prepares two traction ropes 5, one end of each traction rope 5 is wound on the winding roller of the first winding mechanism 11, and the other end is wound on the winding roller of the second winding mechanism 4;

S5. Fix the first support roller 6 at one end of the lightweight flexible photovoltaic module 7, fix the second support roller 9 at the other end, and fix a plurality of third support rollers 10 equidistantly in the middle.

After the flexible photovoltaic system folded and stored underground in the present invention is installed according to the above steps, and its control system is connected, it can start working. When the light intensity is less than 200W/m ² , the first winding mechanism 11 and the second winding mechanism 4 do not rotate, and the lightweight and flexible photovoltaic module 7 remains stored in the storage slot 8 . When the light intensity increases to more than 200W/ ^m2 , the photosensitive control switch is turned on, the lifting support rod 1 is extended to the set height, the first winding mechanism 11 and the second winding mechanism rotate clockwise synchronously, and the lightweight flexible photovoltaic module 7 is unfolded and power generation begins. After the flexible photovoltaic module 7 is unfolded, when the light intensity is reduced to less than 200W/m ² , the photosensitive control switch is turned on, the first winding mechanism 11 and the second winding mechanism 4 rotate counterclockwise synchronously, and the lightweight flexible photovoltaic module 7 is folded, and then the lifting support rod 1 is shrunk down to the storage slot 8 of the installation frame. After folding, the lightweight flexible photovoltaic module 7 is stored in the storage slot 2 of the photovoltaic module, which can protect the lightweight flexible photovoltaic module 7.在质柔性光伏组件7展开状态下，风速大于5m/s时，风感控制器控制开关开启，第一收卷机构11和第二收卷机构4也同步逆时针转动，折叠轻质柔性光伏组件7，且升降支撑杆1收缩下降至安装架收纳槽8内，折叠后轻质柔性光伏组件7收纳于光伏组件收纳槽2内，对轻质柔性光伏组件7进行保护；当30分钟内无风速大于5m/s的风且光照强度大于200W/m ²时，风感控制器控制开关开启，升降支撑杆11伸长至设定的高度，第一收卷机构11和第二收卷机构4再同步顺时针转动，展开轻质柔性光伏组件7继续发电。

The above description is only an embodiment of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims (10)

1. A flexible photovoltaic system foldable and stowable in the ground, characterized in that: the photovoltaic system comprises a mounting frame, a light flexible photovoltaic module (7), a folding retraction mechanism, a photovoltaic module storage groove (2) and a mounting frame storage groove (8), wherein the mounting frame comprises two groups of lifting brackets which are symmetrically arranged, each group of lifting brackets comprises at least two lifting support rods (1) and a cross beam (3) erected at the top of the lifting support rods, the mounting frame storage groove (8) is provided with two lifting support rods, the two lifting support rods are respectively positioned at the bottoms of the two groups of lifting support rods, the length of each mounting frame storage groove (8) is greater than or equal to the integral length of each lifting support rod, the lifting support rods (1) of each group of lifting support rods are arranged in the corresponding mounting frame storage groove (8) in a retraction state of the lifting support rods (1), and the photovoltaic module storage groove (2) is positioned at the end parts of the two mounting frame storage grooves (8) and is communicated with the two mounting frame storage grooves (8).

The folding and unfolding mechanisms are provided with two groups, the two groups of folding and unfolding mechanisms are symmetrically arranged on the cross beams (3) of the two groups of lifting brackets, each group of folding and unfolding mechanisms comprises a traction rope (5) and a first rolling mechanism (11) and a second rolling mechanism (4) which are respectively arranged at two ends of the cross beams (3), one end of the traction rope (5) is wound on a rolling roller of the first rolling mechanism (11), the other end of the traction rope is wound on a rolling roller of the second rolling mechanism (4), and the first rolling mechanism (11) and the second rolling mechanism (4) synchronously rotate in the same direction; when the first winding mechanism (11) rotates to wind the traction rope (5), the second winding mechanism (4) synchronously rotates to release the traction rope (5) on the winding roller; the light flexible photovoltaic module (7) is provided with a plurality of supporting rollers along the length direction, the light flexible photovoltaic module (7) is erected on the cross beams (3) of the two groups of lifting brackets through the plurality of supporting rollers, a first supporting roller (6) which is close to one end of the photovoltaic module accommodating groove (2) is fixed on the cross beams (3), two ends of a second supporting roller (9) which is far away from one end of the photovoltaic module accommodating groove (2) are respectively fixed on traction ropes (5) of the two groups of folding and releasing mechanisms, and two ends of a plurality of third supporting rollers (10) which are positioned between the first supporting roller (6) and the second supporting roller (9) are in sliding connection with the cross beams (3) of the two groups of lifting brackets; and the second supporting roller (9) and the third supporting roller (10) are driven to move in the moving process of the traction rope (5) so as to fold or unfold the light flexible photovoltaic module (7).

2. A flexible photovoltaic system foldable and stowable under the ground according to claim 1, wherein: the utility model discloses a photovoltaic module is characterized by comprising a crossbeam (3), a chute is correspondingly arranged on the top surface of one side opposite to the crossbeam (3), both ends of a first support roller (6), a second support roller (9) and a third support roller (10) are all arranged in the chute, and both ends of the first support roller (6) are fixed at one end of the chute adjacent to the photovoltaic module storage groove (2), both ends of the second support roller (9) and the third support roller (10) are all in sliding connection with the chute, the traction rope (5) is arranged at a position higher than the crossbeam (3), and the second support roller (9) is fixedly connected with the traction rope (5) through a fixed lifting rope or a suspension rod and drives the second support roller (9) to slide in the chute on the crossbeam when the traction rope (5) moves.

3. A flexible photovoltaic system foldable and stowable under the ground according to claim 1 or 2, characterized in that: the light flexible photovoltaic module (7) is a whole photovoltaic module, a plurality of flexible solar cells and conductive lines are packaged in the photovoltaic module, and current of the light flexible photovoltaic module is output from one end close to the photovoltaic module accommodating groove (2); the width of the light flexible photovoltaic component (7) is matched with the distance between the two groups of cross beams (3), and the length of the light flexible photovoltaic component is smaller than that of the cross beams (3); the first supporting rollers (6), the second supporting rollers (9) and the third supporting rollers (10) are distributed at equal intervals along the length direction of the light flexible photovoltaic module (7), and the distance between every two adjacent supporting rollers is 1.5-2m.

4. A flexible photovoltaic system foldable and stowable under the ground according to claim 1 or 2, characterized in that: the first winding mechanism (11) and the second winding mechanism (4) are motors, winding rollers of the motors are arranged on output shafts of the motors, and traction ropes (5) of the two groups of folding winding and unwinding mechanisms are always parallel to each other and the cross beam (3).

5. A flexible photovoltaic system foldable and stowable under the ground according to claim 1 or 2, characterized in that: the lifting support comprises two lifting support rods (1), the two lifting support rods (1) are positioned at the bottoms of two ends of the cross beam (3), and each lifting support rod (1) adopts a hydraulic or electric telescopic rod; the height of the mounting frame accommodating groove (8) is greater than or equal to the height of the lifting support in a fully contracted state, the width of the mounting frame accommodating groove is greater than the width of the widest part of the cross beam (3) and the winding mechanism, and under the fully contracted state of the lifting support, the lifting support and the folding winding mechanism above the cross beam of the lifting support are all arranged in the mounting frame accommodating groove (8), and shielding protective covers are arranged in the notch of each mounting frame accommodating groove (8) in a matched mode.

6. A flexible photovoltaic system foldable and stowable under the ground according to claim 1 or 2, characterized in that: the light flexible photovoltaic module (7) adopts a light film photovoltaic module which can be bent and flattened, the depth of the photovoltaic module accommodating groove (2) is larger than the whole height of the light flexible photovoltaic module (7) in the folding state, the width of the photovoltaic module accommodating groove is larger than the whole width of the light flexible photovoltaic module (7) in the folding state, the light flexible photovoltaic module (7) after folding is accommodated in the photovoltaic module accommodating groove (2) in the complete shrinkage state of the lifting support, and a shielding protective cover is arranged in the notch of the photovoltaic module accommodating groove (2) in a matching manner.

7. A flexible photovoltaic system foldable and stowable under the ground according to claim 3, wherein: the light flexible photovoltaic module (7) is folded to be V-shaped, and the supporting roller is positioned on the midpoint line of the connection of two adjacent V-shapes.

8. A flexible photovoltaic system foldable and stowable under the ground according to claim 4, wherein: the first winding mechanism (11) and the second winding mechanism (4) of the two groups of folding winding and unwinding mechanisms are synchronously controlled by the same control circuit; the rolling rollers of the four groups of rolling mechanisms rotate in the same direction and at the same speed, and simultaneously rotate clockwise or anticlockwise, so that the two traction ropes (5) are synchronously wound on the rolling rollers of the two first rolling mechanisms (11) or the rolling rollers of the two second rolling mechanisms (4), the two traction ropes (5) drive the second supporting rollers (9) to move rightwards or leftwards, and therefore the light flexible photovoltaic assembly (7) is unfolded or folded.

9. A flexible photovoltaic system foldable and stowable under the ground according to claim 5, wherein: the lifting support rod (1), the first winding mechanism (11) and the second winding mechanism (4) are respectively provided with a manual control switch, a photosensitive control switch and a wind-sense control switch.

10. A flexible photovoltaic system foldable and stowable under the ground according to claim 9, wherein: the flexible photovoltaic system is provided with a control system, and the illumination intensity is less than 200W/m ² When the photovoltaic module is in use, the first winding mechanism (11) and the second winding mechanism (4) do not rotate, and the light flexible photovoltaic module (7) is arranged in the storage groove (8); at an illumination intensity of more than 200W/m ² When the photosensitive control switch is started, the lifting support rod (1) stretches to a set height, the first winding mechanism (11) and the second winding mechanism (4) rotate clockwise, and the light flexible photovoltaic module (7) is unfolded and power generation is started; the illumination intensity is reduced to less than 200W/m in the unfolded state of the flexible photovoltaic module (7) ² When the photosensitive control switch is started, the first winding mechanism (11) and the second winding mechanism (4) rotate anticlockwise, the light flexible photovoltaic module (7) is folded, the lifting support rod (1) is contracted and lowered into the mounting frame accommodating groove (8), and the folded light flexible photovoltaic module (7) is accommodated in the photovoltaic module accommodating groove (2); when the wind speed is greater than 5m/s in the unfolding state of the flexible photovoltaic module (7), the wind sense controller controls the switch to be turned on, the first winding mechanism (11) and the second winding mechanism (4) rotate anticlockwise, the light flexible photovoltaic module (7) is folded, the lifting support rod (1) is contracted and descends into the mounting rack accommodating groove (8), and the folded light flexible photovoltaic module (7) is accommodated in the photovoltaic module accommodating groove (2); when the wind speed is not higher than 5m/s within 30 minutes and the illumination intensity is higher than 200W/m ² When the wind-sensing controller controls the switch to be turned on, the descending support rod (1) stretches to a set height, and the first winding mechanism (11) and the second winding mechanismThe winding mechanism (4) rotates clockwise, and the light flexible photovoltaic module (7) is unfolded and starts to generate electricity.