A photovoltaic energy storage charging system

Abstract

The present invention relates to the field of photovoltaics, and discloses a photovoltaic energy storage charging system, including photovoltaic panels and energy storage batteries, wherein the photovoltaic panels are arranged in four groups and installed in each frame, wherein a U-shaped air duct is arranged in the frame, wherein the U-shaped air duct is used for heat dissipation and dust removal, wherein the U-shaped air duct is driven by a first fan assembly, wherein the frame is fixed to a protection assembly, and wherein the protection assembly drives the frame to flip so that the photovoltaic panels are turned over and closed. By arranging a protection assembly, when the wind force is too strong and the photovoltaic panels are easily damaged, the present invention provides power through external wind force to close each photovoltaic panel to avoid damage, and utilizes wind energy, which is environmentally friendly and pollution-free, and reduces equipment energy consumption, and after closing, the photovoltaic panels are arranged in staggered layers from top to bottom, which saves use space, increases the illumination area, and further improves energy storage efficiency.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaics, and in particular to a photovoltaic energy storage and charging system. Background Art

[0002] The photovoltaic power generation and power supply application system uses the electricity generated by photovoltaic panels to directly provide it to users, and the excess electricity is stored in batteries. The photovoltaic power storage solution has the characteristics of safety, pollution-free, and sufficient resources. It is being widely popularized and promoted due to its advantages such as low operating costs and short construction period.

[0003] At present, photovoltaic energy storage systems are greatly affected by the environment. For example, overheating affects energy storage efficiency, strong winds easily damage photovoltaic panels, and dust accumulation on the surface of photovoltaic panels reduces power conversion. Therefore, a photovoltaic energy storage charging system is urgently needed to solve the above problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a photovoltaic energy storage charging system that improves energy storage efficiency and protects photovoltaic panels.

[0005] The present invention provides a photovoltaic energy storage charging system, comprising a photovoltaic panel and an energy storage battery, wherein the photovoltaic panel is arranged in four groups and installed in each frame, a U-shaped air duct is arranged in the frame, the U-shaped air duct is used for heat dissipation and dust removal, the U-shaped air duct is driven by a first fan assembly, the frame is fixed to a protection assembly, and the protection assembly drives the frame to flip so that the photovoltaic panel is turned over and closed;

[0006] The protection component comprises a support frame, the support frame is fixed on the ground, a bearing in the support frame is connected to a first rotating shaft, a plurality of first fan blades are fixed on the first rotating shaft, the rotation of the first fan blades is driven by external wind force, the first rotating shaft is fixed to a circular disc, a guide groove is provided on the circular disc, four arc-shaped concave grooves are arranged at intervals, one end of four groups of pins are arranged in the guide groove, and the other ends of the four groups of pins are respectively connected to four closing components, the closing component comprises a slider, the slider is fixed to the other end of the pin, the slider moves along a guide sleeve, the slider is fixed to a rack, the rack is meshed with a gear, the gear is connected to a circular ring bearing, the circular ring is fixed to the support frame, the gear is fixed to a C-shaped plate, the C-shaped plate is fixed to the frame through an adjustment component, the adjustment component makes the photovoltaic panels stacked in staggered layers after being folded, the guide sleeve is fixed to the support plate, and the support plate is fixed to the circular ring;

[0007] The energy storage battery is electrically connected to the photovoltaic panel, the energy storage battery is fixed above the support frame, and a first fan assembly is arranged outside the energy storage battery for heat dissipation.

[0008] The present invention provides a photovoltaic energy storage and charging system, wherein a plurality of first glasses and second glasses with opposite inclination directions are fixed on the surface of the photovoltaic panel, the first glasses and the second glasses are alternately arranged, and a plurality of blowing pipes are fixedly connected on both sides of the U-shaped air duct, the blowing pipes on one side of the U-shaped air duct correspond to the position of the first glasses, and the blowing pipes on the other side of the U-shaped air duct correspond to the position of the second glasses.

[0009] The present invention provides a photovoltaic energy storage charging system, wherein the first fan assembly includes a first annular rod, the first annular rod surrounds the outside of the energy storage battery, a plurality of second fan blades are fixed on the first annular rod, four convex pieces are fixed on the first annular rod, the first annular rod also fixes one end of a plurality of first support rods, the other end of the first support rod is connected to a roller bearing, the roller moves along an annular guide groove, the annular guide groove is provided on the inner wall of the second annular rod, the second annular rod is fixed to the support frame, the tip of the convex piece can overlap with the surface of the arc plate, the arc plate is fixed to one end of the airbag, the surface of the airbag is arranged in continuous folds, the other end of the airbag is fixed to the support frame, the airbag is fixed and connected to one end of the air pipe, and the other end of the air pipe is fixedly connected to the U-shaped air duct.

[0010] The present invention provides a photovoltaic energy storage charging system, wherein the adjustment component includes a screw rod, the screw rod is inserted through the upper and lower wings of the C-shaped plate and the guide holes on the frame, the top of the screw rod is fixed to the C-shaped plate through a nut, two nuts are threadedly connected on the screw rod, the two nuts are respectively located on both sides of the frame, and four frames of different heights can be fixed on the screw rod respectively.

[0011] The present invention provides a photovoltaic energy storage and charging system, wherein the frame is arranged in a cross shape.

[0012] The present invention provides a photovoltaic energy storage charging system, wherein the cross section of the slider is I-shaped, the guide sleeve is provided with an I-shaped guide hole, and the I-shaped slider matches the shape of the guide sleeve.

[0013] The present invention provides a photovoltaic energy storage charging system, wherein the airbag is fixed to one end of a second spring, and the other end of the second spring is fixed to the second annular rod.

[0014] The present invention provides a photovoltaic energy storage charging system, wherein the airbag is provided with a one-way air inlet.

[0015] The photovoltaic energy storage charging system of the present invention is different from the prior art in that:

[0016] 1. A photovoltaic energy storage and charging system of the present invention is provided with a protective component. When the wind is too strong and the photovoltaic panels are easily damaged, the external wind provides power to close each photovoltaic panel to avoid damage. The wind energy is utilized, which is environmentally friendly and pollution-free, and reduces the energy consumption of the equipment. After the photovoltaic panels are closed, they are staggered from top to bottom, which saves the use space, increases the illumination area, and thus improves the energy storage efficiency.

[0017] 2. The present invention uses external wind force to rotate the second fan blade, so that the energy storage battery can be cooled down continuously and rapidly, thereby improving the energy storage efficiency. The wind blown out of the blowpipe is in gusts, forming more turbulence at the air outlet, thereby achieving better cleaning and heat dissipation effects.

[0018] A photovoltaic energy storage charging system of the present invention is further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an axonometric diagram of a photovoltaic energy storage charging system;

[0020] Figure 2 yes Figure 1 A front view of a photovoltaic energy storage charging system is shown;

[0021] Figure 3 yes Figure 2 A top view of

[0022] Figure 4 yes Figure 1 A partial enlarged view of

[0023] Figure 5 yes Figure 1 A partial enlarged view of

[0024] Figure 6 yes Figure 1 A partial enlarged view of

[0025] Figure 7 yes Figure 1 A partial enlarged view of

[0026] Figure 8 yes Figure 2 A partial enlarged view of .

[0027] In the figure:

[0028] Photovoltaic panel 1, energy storage battery 2, frame 11, U-shaped air duct 12, first auxiliary rod 110, second auxiliary rod 111, third auxiliary rod 112, fourth auxiliary rod 113, second spring 114, one-way air inlet 115;

[0029] Protection assembly 100, support frame 101, first rotating shaft 102, first fan blade 103, first spring 104, limiting rod 105, disc 106, guide groove 107, arc-shaped concave 108, pin 109;

[0030] Closing assembly 1000, slider 1001, guide sleeve 1002, rack 1003, gear 1004, ring 1005, C-shaped plate 1006, support plate 1007;

[0031] A first glass 61, a second glass 62, a blowing pipe 63, and a guide plate 65;

[0032] The first fan assembly 3, the first annular rod 31, the second fan blade 32, the convex piece 33, the first support rod 34, the roller 35, the annular guide groove 36, the second annular rod 30, the arc plate 37, the air bag 38, and the air delivery pipe 39;

[0033] Adjustment assembly 40, screw rod 401, nut 402. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1 to Figure 8 The present invention provides four technical solutions, which specifically include the following embodiments: Embodiment 1:

[0036] A photovoltaic energy storage charging system includes a photovoltaic panel 1 and an energy storage battery 2. The photovoltaic panel 1 is provided in four groups and installed in each frame 11. A U-shaped air duct 12 is provided in the frame 11. The U-shaped air duct 12 is used for heat dissipation and dust removal. The U-shaped air duct 12 is driven by a first fan assembly 3. The frame 11 is fixed to a protection assembly 100. The protection assembly 100 drives the frame 11 to flip so that the photovoltaic panel 1 is turned over and closed.

[0037] The protection component 100 includes a support frame 101, the support frame 101 is fixed on the ground, the bearing inside the support frame 101 is connected to the first rotating shaft 102, a plurality of first fan blades 103 are fixed on the first rotating shaft 102, the rotation of the first fan blades 103 is driven by external wind force, the first rotating shaft 102 is fixed to a disc 106, a guide groove 107 is provided on the disc 106, four arc-shaped concave portions 108 are arranged at intervals on the guide groove 107, one end of four groups of pins 109 are arranged in the guide groove 107, the other ends of the four groups of pins 109 are respectively connected to four closing components 1000, and the closing component 1000 includes a slider 1001, The slider 1001 is fixed to the other end of the pin 109, the slider 1001 moves along the guide sleeve 1002, the slider 1001 is fixed to the rack 1003, the rack 1003 is meshed with the gear 1004, the gear 1004 is connected to the ring 1005 bearing, the ring 1005 is fixed to the support frame 101, the gear 1004 is fixed to the C-shaped plate 1006, the C-shaped plate 1006 is fixed to the frame 11 through the adjustment component 40, the adjustment component 40 makes the photovoltaic panel 1 staggered and stacked after folding, the guide sleeve 1002 is fixed to the support plate 1007, and the support plate 1007 is fixed to the ring 1005;

[0038] The energy storage battery 2 is electrically connected to the photovoltaic panel 1 , the energy storage battery 2 is fixed above the support frame 101 , and a first fan assembly 3 is arranged outside the energy storage battery 2 for heat dissipation.

[0039] The present invention sets a protection component 100. When the wind is too strong and the photovoltaic panel 1 is easily damaged, the external wind provides power to close each photovoltaic panel 1 to avoid damage. The wind energy is utilized, which is environmentally friendly and pollution-free, and reduces the energy consumption of the equipment. After the photovoltaic panels 1 are closed, they are staggered from top to bottom, which saves the use space, increases the illumination area, and thus improves the energy storage efficiency.

[0040] During operation, when the wind force exceeds level six, the first fan blade 103 is blown to rotate 30°, driving the first rotating shaft 102 to rotate, and then the disk 106 is rotated 30°, so that the pin shaft 109 in the guide groove 107 moves out from the arc-shaped recess 108, thereby causing the slider 1001 to move radially outward, and the rack 1003 to move outward, driving the gear 1004 to rotate clockwise, and then driving the photovoltaic panel 1 in the frame 11 to flip 180° clockwise, from the outside of the ring 1005 to the inside, so that the photovoltaic panel 1 faces downward.

[0041] Among them, according to the wind level classification, level 6 wind is a strong wind. When the wind is greater than or equal to level 6, the first fan blade 103 can rotate. Of course, when there is no wind, it can be closed with the help of an exhaust fan or rotated manually.

[0042] The support frame 101 is hollowed out to allow natural wind from the outside to enter.

[0043] Among them, when the wind force exceeds level 6, no matter what the wind direction is, the photovoltaic panel 1 can be driven to fold.

[0044] The first rotating shaft 102 is fixed to the first spring 104, and the first spring 104 is fixed to the support frame 101. The present invention enables the first fan blade 103 to rotate only when the wind force driving the first rotating shaft 102 to rotate is greater than the traction force of the first spring 104. Those skilled in the art can determine the appropriate spring traction force according to the actual material strength of the photovoltaic panel 1. The higher the actual material strength, the stronger the wind resistance and damage resistance, and the safer it can be under a higher wind level. Therefore, the corresponding spring traction force needs to be set larger to adapt to various wind conditions.

[0045] Wherein, the limiting rods 105 are fixed on both sides of the first blade 103 respectively. The present invention can limit the rotation angle of the first blade 103 so that the photovoltaic panel 1 can be turned over and closed. As the wind force increases, it does not continue to rotate. On the contrary, the stronger the wind force, the more solid the structure.

[0046] Among them, the two ends of the slider 1001 can be exposed outside the guide sleeve 1002, and two limit blocks are symmetrically set on the exposed parts at both ends of the slider 1001 to limit the moving distance of the slider 1001, thereby ensuring that the slider 1001 does not separate from the guide sleeve 1002, thereby limiting the rotation angle of the photovoltaic panel 1.

[0047] The specific manner of “the circular ring 1005 is fixed to the support frame 101 ” is: the circular ring 1005 is fixed to the first auxiliary rod 110 , and the other end of the first auxiliary rod 110 is fixed to the support frame 101 .

[0048] The specific method of “the support plate 1007 is fixed to the circular ring 1005 ” is as follows: the support plate 1007 is fixed to one end of the second auxiliary rod 111 , and the other end of the second auxiliary rod 111 is fixed to the circular ring 1005 .

[0049] As a further explanation of this example, refer to Figure 3 The frame 11 is arranged in a cross shape for easy folding.

[0050] As a further explanation of this embodiment, refer to Figure 1 The cross section of the slider 1001 is I-shaped, and the guide sleeve 1002 is provided with an I-shaped guide hole. The I-shaped slider 1001 matches the shape of the guide sleeve 1002, so that the slider 1001 can move radially. Embodiment 2:

[0051] Based on Example 1, refer to Figure 4~Figure 5 A plurality of first glasses 61 and second glasses 62 with opposite inclination directions are fixed on the surface of the photovoltaic panel 1, and the first glasses 61 and the second glasses 62 are alternately arranged. A plurality of blowing pipes 63 are fixedly connected on both sides of the U-shaped air duct 12, and the blowing pipes 63 on one side of the U-shaped air duct 12 correspond to the position of the first glasses 61, and the blowing pipes 63 on the other side of the U-shaped air duct 12 correspond to the position of the second glasses 62.

[0052] The present invention divides the dust removal and heat dissipation on the surface of the photovoltaic panel 1 into multiple areas, blows off the dust on the surface through the blowing pipe 63, and keeps air convection to prevent dust from falling again. The flow of air is used to dissipate heat, protect the photovoltaic panel 1, and avoid excessive local temperature.

[0053] The blowing direction of the blowing pipe 63 is consistent with the inclination direction of the first glass 61 or the second glass 62, and the inclined setting ensures that the surface dust can be blown away quickly.

[0054] Among them, the U-shaped air duct 12 is arranged between the frame 11 and the photovoltaic panel 1, the height of the U-shaped air duct 12 is lower than the photovoltaic panel 1, the blowing pipe 63 on the U-shaped air duct 12 is higher than the photovoltaic panel 1, and the guide plate 65 is covered and fixed between the frame 11 and the photovoltaic panel 1. The guide plate 65 is inclined radially outward. The guide plate 65 can make the dust blown off to both sides by the blowing pipe 63 flow out, so as to keep the surface of the photovoltaic panel 1 clean.

[0055] Wherein, a solenoid valve is installed on the blowing pipe 63 to control the switch and ensure one-way blowing. Embodiment three:

[0056] Reference Figure 1~Figure 2 and Figure 7 The first fan assembly 3 includes a first annular rod 31, which surrounds the outside of the energy storage battery 2. A plurality of second fan blades 32 are fixed on the first annular rod 31. Four protruding pieces 33 are fixed on the first annular rod 31. The first annular rod 31 also fixes one end of a plurality of first support rods 34. The other end of the first support rod 34 is connected to a roller 35 bearing. The roller 35 moves along an annular guide groove 36. The annular guide groove 36 is provided on the inner wall of the second annular rod 30. The second annular rod 30 is fixed to the support frame 101. The tip of the protruding piece 33 can overlap with the surface of the arc plate 37. The arc plate 37 is fixed to one end of the airbag 38. The surface of the airbag 38 is arranged in a continuous fold. The other end of the airbag 38 is fixed to the support frame 101. The airbag 38 is fixed and connected to one end of the air supply pipe 39. The other end of the air supply pipe 39 is fixed and connected to the U-shaped air duct 12.

[0057] The present invention uses external wind to rotate the second blade 32, so that natural wind accelerates to take away heat around the energy storage battery, so that the energy storage battery 2 is continuously and rapidly cooled, and the energy storage efficiency is improved. The rotation of the second blade 32 can make the convex piece 33 overlap or not overlap the arc plate 37. When the convex piece 33 overlaps the arc plate 37, the air bag 38 is compressed, and the gas is blown into the air delivery pipe 39, and discharged to the photovoltaic panel 1 through the blowing pipe 63 on the U-shaped air duct 12, blowing off dust and cooling. When the convex piece 33 rotates to not overlap the arc plate 37, the air bag 38 absorbs external air and shrinks to reset. The present invention makes the wind blown out of the blowing pipe 63 in waves, forming more turbulence at the air outlet, so that the cleaning and heat dissipation effects are better.

[0058] Among them, when the wind force is small or there is no wind, an exhaust fan can be installed to blow air. Moreover, when the wind speed of the air blown out of the air bag 38 is too low, compressed air can be introduced.

[0059] The surface of the airbag 38 is provided with continuous folds, so that the airbag 38 has the ability to return to its original state.

[0060] The arc plate 37 is slidably connected to the guide rail, and the guide rail is fixed to the support frame 101, which can ensure that the airbag 38 can shrink laterally without causing longitudinal deformation.

[0061] Among them, the specific method of "the second annular rod 30 is fixed to the support frame 101" is: the second annular rod 30 is fixed to one end of the third auxiliary rod 112, the other end of the third auxiliary rod 112 is fixed to the support frame 101, and multiple third auxiliary rods 112 are provided.

[0062] The specific manner of “the airbag 38 is fixed to the support frame 101 ” is: the airbag 38 is fixed to one end of the fourth auxiliary rod 113 , and the other end of the fourth auxiliary rod 113 is fixed to the support frame 101 .

[0063] As a further explanation of this example, refer to Figure 1~Figure 2 The airbag 38 is fixed to one end of the second spring 114 , and the other end of the second spring 114 is fixed to the second annular rod 30 .

[0064] The present invention enables the air bag 38 to be quickly reset, thereby increasing the wind speed.

[0065] As a further explanation of this example, refer to Figure 1~Figure 2 The airbag 38 has a one-way air inlet 115 .

[0066] The present invention allows the inhaled gas to be discharged only through the gas delivery pipe 39, and the one-way air inlet 115 can be installed with an air compressor. Embodiment 4:

[0067] Reference Figure 2 and Figure 8 The adjustment assembly 40 includes a screw rod 401, which is inserted into the upper and lower wings of the C-shaped plate 1006 and the guide holes on the frame 11. The top of the screw rod 401 is fixed to the C-shaped plate 1006 through a nut. Two nuts 402 are threadedly connected to the screw rod 401. The two nuts 402 are respectively located on both sides of the frame 11. The screw rod 401 can fix four frames 11 of different heights respectively.

[0068] The present invention fixes the four frames 11 at different heights by adjusting the height of the two nuts 402 on the screw rod 401, so that the photovoltaic panels 1 do not interfere with each other when they are folded, and can be stacked in staggered layers. Compared with traditional parallel stacking, the usable area can be nearly doubled, thereby improving the light utilization rate.

Claims

1. A photovoltaic energy storage charging system, characterized in that: The invention comprises a photovoltaic panel (1) and an energy storage battery (2), characterized in that: the photovoltaic panel (1) is arranged in four groups and installed in each frame (11); a U-shaped air duct (12) is arranged in the frame (11); the U-shaped air duct (12) is used for heat dissipation and dust removal; the U-shaped air duct (12) is driven by a first fan assembly (3); the frame (11) is fixed to a protection assembly (100); the protection assembly (100) drives the frame (11) to flip so that the photovoltaic panel (1) is turned over and closed; The protection component (100) comprises a support frame (101), the support frame (101) is fixed on the ground, a bearing in the support frame (101) is connected to a first rotating shaft (102), a plurality of first fan blades (103) are fixed on the first rotating shaft (102), the rotation of the first fan blades (103) is driven by external wind force, the first rotating shaft (102) is fixed to a disk (106), a guide groove (107) is provided on the disk (106), four arc-shaped recesses (108) are arranged at intervals on the guide groove (107), one end of four groups of pins (109) are arranged in the guide groove (107), the other ends of the four groups of pins (109) are respectively connected to four closing components (1000), and the closing component (1000) comprises a slider (1001), the slider The block (1001) is fixed to the other end of the pin shaft (109), the slider (1001) moves along the guide sleeve (1002), the slider (1001) is fixed to the rack (1003), the rack (1003) is meshed with the gear (1004), the gear (1004) is connected to the ring (1005) by a bearing, the ring (1005) is fixed to the support frame (101), the gear (1004) is fixed to the C-shaped plate (1006), the C-shaped plate (1006) is fixed to the frame (11) through an adjustment component (40), the adjustment component (40) enables the photovoltaic panels (1) to be folded and stacked in staggered layers, the guide sleeve (1002) is fixed to the support plate (1007), and the support plate (1007) is fixed to the ring (1005); The energy storage battery (2) is electrically connected to the photovoltaic panel (1); the energy storage battery (2) is fixed above the support frame (101); and a first fan assembly (3) is arranged outside the energy storage battery (2) for heat dissipation.

2. A photovoltaic energy storage charging system according to claim 1, characterized in that: A plurality of first glasses (61) and second glasses (62) with opposite inclination directions are fixed on the surface of the photovoltaic panel (1); the first glasses (61) and the second glasses (62) are arranged alternately; a plurality of blowing pipes (63) are fixedly connected to both sides of the U-shaped air duct (12); the blowing pipes (63) on one side of the U-shaped air duct (12) correspond to the position of the first glasses (61); and the blowing pipes (63) on the other side of the U-shaped air duct (12) correspond to the position of the second glasses (62).

3. A photovoltaic energy storage charging system according to claim 1, characterized in that: The first fan assembly (3) comprises a first annular rod (31), the first annular rod (31) surrounds the outside of the energy storage battery (2), a plurality of second fan blades (32) are fixed on the first annular rod (31), four protruding pieces (33) are fixed on the first annular rod (31), the first annular rod (31) also fixes one end of a plurality of first support rods (34), the other end of the first support rod (34) is connected to a bearing of a roller (35), the roller (35) moves along an annular guide groove (36), and the annular guide groove (36) The second annular rod (30) is provided on the inner wall thereof; the second annular rod (30) is fixed to the support frame (101); the protruding piece (33) is capable of overlapping the surface of the arc plate (37); the arc plate (37) is fixed to one end of the airbag (38); the surface of the airbag (38) is provided with continuous folds; the other end of the airbag (38) is fixed to the support frame (101); the airbag (38) is fixed to and communicated with one end of an air supply pipe (39); and the other end of the air supply pipe (39) is fixedly communicated with the U-shaped air duct (12).

4. A photovoltaic energy storage charging system according to claim 1, characterized in that: The adjustment assembly (40) comprises a screw rod (401), the screw rod (401) being inserted through the guide holes on the upper and lower wings of the C-shaped plate (1006) and the frame (11), the top of the screw rod (401) being fixed to the C-shaped plate (1006) via a nut, two nuts (402) being threadedly connected to the screw rod (401), the two nuts (402) being respectively located on two sides of the frame (11), and the screw rod (401) being capable of fixing four frames (11) of different heights respectively.

5. A photovoltaic energy storage charging system according to claim 1, characterized in that: The four frames (11) are arranged in a cross shape.

6. A photovoltaic energy storage charging system according to claim 1, characterized in that: The cross section of the slider (1001) is I-shaped, the guide sleeve (1002) is provided with an I-shaped guide hole, and the I-shaped slider (1001) matches the shape of the guide sleeve (1002).

7. A photovoltaic energy storage charging system according to claim 3, characterized in that: The airbag (38) is fixed to one end of the second spring (114), and the other end of the second spring (114) is fixed to the second annular rod (30).

8. A photovoltaic energy storage charging system according to claim 3, characterized in that: The air bag (38) is provided with a one-way air inlet (115).

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