Electric energy conversion equipment of photovoltaic energy storage micro-grid system

Abstract

The invention relates to the technical field of electric energy storage, in particular to an electric energy conversion device of a photovoltaic energy storage micro-grid system, which comprises a protection bin, one side of the protection bin is provided with an openable front cover, the middle part of the protection bin is recessed inwards to form a placement cavity, and a plurality of batteries are arranged in the placement cavity. A liquid storage tank is further arranged in the containing cavity, a water pump for sucking cooling liquid is arranged below the liquid storage tank, a heat conduction pipe is arranged at the output end of the water pump, a plurality of cooling devices are arranged outside the batteries, and a moving device for driving the batteries to move is arranged between the batteries and the containing cavity. Through cooperation of structures such as a first cooling plate, a second cooling plate, a first surrounding pipe, a second surrounding pipe and a conveying pipe, cooling liquid is conveyed into the cooling box through the conveying pipe, the cooling liquid is contained and cooled in the cooling box, the cooling liquid is rapidly cooled, the water cooling effect is improved, and the continuous cooling effect on a battery is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric energy storage, and in particular to an electric energy conversion device for a photovoltaic energy storage microgrid system. Background Art

[0002] Smart microgrid refers to a small power generation and distribution system composed of distributed power sources, energy storage devices, energy conversion devices, loads, monitoring and protection devices, etc. It uses advanced Internet and information technology to achieve flexible and efficient application of distributed power sources, and has certain energy management functions. In smart microgrids, photovoltaic power generation is a common way to produce electricity. The electricity generated by photovoltaic power generation is stored in battery packs for later use. The battery pack can convert electrical energy into chemical energy and store it. When used later, the chemical energy can be converted into electrical energy. Therefore, when converting electrical energy and chemical energy into each other, a photovoltaic energy storage microgrid system power conversion device is needed.

[0003] Although the existing power conversion equipment of the photovoltaic energy storage microgrid system can set up a circulating heat dissipation mechanism, wrap the heat pipe around the outside of the battery, and use water circulation to carry the heat generated by the battery, when the battery is charging and discharging, the battery electrodes and the top of the battery will generate more heat, and the heat pipe is directly exposed to the inside of the battery box, which will affect the heat of the water inside the heat pipe. As a result, after long-term use, the water temperature inside the heat pipe will gradually increase, affecting the refrigeration effect of the water cooling. Therefore, we propose a power conversion equipment for a photovoltaic energy storage microgrid system. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides an electric energy conversion device for a photovoltaic energy storage microgrid system.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: An electric energy conversion device for a photovoltaic energy storage microgrid system, comprising: A protection compartment, wherein a front cover that can be opened and closed is arranged on one side of the protection compartment, and the middle part of the protection compartment is recessed inward to form a placement cavity, a plurality of batteries are arranged inside the placement cavity, and a liquid storage tank is also arranged inside the placement cavity, a water pump for sucking coolant is arranged below the liquid storage tank, and a heat conduction pipe is arranged at the output end of the water pump; A plurality of cooling devices are arranged outside the plurality of batteries, and a moving device for driving the batteries to move is arranged between the plurality of batteries and the placement cavity; The cooling device comprises two first cooling plates arranged on both sides of the battery, a detachable second cooling plate is arranged on the top of the two first cooling plates, a cold air cavity for storing the heat conducting pipe is arranged in the middle of the first cooling plate, and a conveying cavity adapted to the heat conducting pipe is arranged in the middle of the second cooling plate, and an inclined surface is arranged on the bottom of the inner wall of the conveying cavity, two baffles are arranged on the opposite sides of the two first cooling plates, and a plurality of air outlets are arranged on the baffles, the first cooling plate and the second cooling plate are made of a material with good thermal conductivity, and the first cooling plate and the second cooling plate are spliced ​​to form an inverted U-shaped cooling jacket, and the cold air released by the heat conducting pipe is evenly conveyed to the outside of the battery through the air outlets on the baffles, so that the uniform cold air of the cooling jacket is evenly surrounded on the top and both sides of the battery, further improving the effect of the cold zone, and the water inside the second cooling plate can be conveyed to the inside of the first cooling plate through the inclined surface, so as to prevent the water vapor in the air from condensing into water droplets and then falling on the electrodes of the battery, thereby damaging the battery; The heat conduction pipe is composed of a conveying pipe, a first surround pipe and a second surround pipe. The first surround pipe is arranged in the conveying cavity, and the second surround pipe is arranged in the cold air cavity. Both ends of the second conveying pipe are connected to the ends of the first conveying pipe. A corrugated pipe is arranged between two adjacent second surround pipes. Quick-release joints are arranged at both ends of the corrugated pipe. The two adjacent second surround pipes can be separated by the quick-release joints of the corrugated pipe.

[0006] As a preferred technical solution of the present invention, the second cooling plate is composed of two fixed frames, two locking columns are symmetrically fixed on the top of the two fixed frames, two limiting balls are fixed on the top of the two locking columns, and two adjacent locking columns are commonly covered with rubber sleeves.

[0007] As a preferred technical solution of the present invention, the second cooling plate is composed of two fixed frames, two connecting plates are fixed at both ends of the fixed frame, and one end of the connecting plate away from the fixed frame is arranged with a wedge block, and the top of the first cooling plate is provided with a wedge groove adapted to the wedge block.

[0008] As a preferred technical solution of the present invention, the mobile device includes a fixed plate fixed on the protective compartment, a plurality of placement racks for convenient battery placement are arranged above the fixed plate, a placement groove suitable for the battery is arranged in the middle of the placement rack, and ventilation grooves are opened on the placement groove to facilitate battery heat dissipation, and an adjustment mechanism is arranged between the fixed plate and the plurality of placement racks.

[0009] As a preferred technical solution of the present invention, the adjusting mechanism includes a positioning block fixed on a fixed plate and a moving block slidably mounted on the fixed plate, a first support rod is fixed on the top of the moving block, a second support rod is fixed on the top of the positioning block, two rotatable second adjusting rods are arranged on the first support rod, two rotatable first adjusting rods are arranged on the second support rod, an end of the second adjusting rod away from the first support rod is hinged to an end of the first adjusting rod away from the second support rod, a sliding groove adapted to the moving block is arranged on the top of the fixed plate, the two first adjusting rods are staggered, and the two first adjusting rods can rotate around the axis of the second support rod, and the first adjusting rod and the second adjusting rod are rotatably connected via a connecting shaft.

[0010] As a preferred technical solution of the present invention, two threaded sleeves are provided on the opposite sides of the two first adjusting rods, a rotatable threaded rod is provided between the two threaded sleeves, an adjusting wheel for people to grasp is provided in the middle of the threaded rod, threaded holes matching the threaded rod are provided on the opposite sides of the two threaded sleeves, and both ends of the threaded rod are screwed into the threaded holes.

[0011] As a preferred technical solution of the present invention, a cooling box is arranged above the liquid storage tank, and a guide pipe is fixed inside the cooling box. The bottom of the guide pipe extends to the outside of the cooling box and is connected to the liquid storage tank, and the top of the guide pipe extends upward to the upper half of the cooling box.

[0012] As a preferred technical solution of the present invention, a drainage sleeve is also fixed inside the cooling box, a slot matched with the guide pipe is provided at the bottom of the drainage sleeve, and a drainage gap is provided after the bottom of the drainage sleeve extends to the lower part of the inner wall of the cooling box, a water outlet gap is provided after the top of the guide pipe extends to the inside of the slot, a slot matched with the guide pipe is provided at the bottom of the drainage sleeve, and the drainage sleeve is sleeved on the outside of the guide pipe, and the drainage sleeve and the guide pipe form a communicating vessel through the water outlet gap.

[0013] Compared with the prior art, the present invention can achieve the following beneficial effects: 1. Through the cooperation of the first cooling plate, the second cooling plate, the first surrounding tube, the second surrounding tube and the transmission tube, the coolant is transported to the inside of the cooling box through the transmission tube, the coolant is contained and cooled inside the cooling box, and flows back into the liquid storage tank through the guide tube, so that the coolant can be quickly cooled without a compressor, thereby improving the water cooling effect and the continuous cooling effect on the battery.

[0014] 2. Through the cooperation of the rotating moving device, the placement rack, the threaded sleeve, the threaded rod, the first adjusting rod and the second adjusting rod, the placement rack drives the battery to move, and the spacing between multiple batteries is adjusted to be smaller, thereby avoiding the spacing between multiple batteries being too large, so that the heat generated by the batteries at work affects each other, and the cooling effect of water cooling is further improved.

[0015] 3. The cooling sleeve formed by the first cooling plate and the second cooling plate is removed from the battery by separating the plurality of bellows from the second surrounding tube, the rubber sleeve is pulled to separate the rubber sleeve from the lock column, the two first cooling plates are pulled to separate the two fixed frames with the two first cooling plates, and then the fixed frame is pushed upward to drive the connecting plate to move upward to separate the connecting plate from the first cooling plate, thereby separating the first cooling plate and the second cooling plate from the first surrounding tube and the second surrounding tube, thereby facilitating people to replace the first cooling plate, the second cooling plate, the first surrounding tube and the second surrounding tube, thereby increasing the convenience of the device.

[0016] 4. After the drainage sleeve is installed on the outside of the guide tube, when the liquid level of the coolant is higher than the guide tube, the coolant flows into the liquid storage tank through the guide tube, and the coolant inside the cooling box becomes less, so that the pressure inside the cooling box becomes smaller, and a siphon is generated inside the cooling box. After all the coolant inside the cooling box is discharged into the liquid storage tank, the coolant inside the liquid storage tank is quickly replenished, avoiding too little cooling inside the liquid storage tank, causing the water pump to run idle, and further increasing the service life of the water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the protection chamber of the present invention; Figure 3 It is a schematic diagram of the structure of the cooling device of the present invention; Figure 4 It is a structural schematic diagram of the first cooling plate of the present invention; Figure 5 It is a schematic diagram of the structure of the heat conducting pipe of the present invention; Figure 6 It is a structural schematic diagram of the locking rod of the present invention; Figure 7 It is a structural schematic diagram of the second cooling plate of the present invention; Figure 8 It is a structural schematic diagram of the liquid storage tank of the present invention; Fig. 9 It is a schematic diagram of the cross-sectional structure of the cooling box of the present invention; Fig.10 is a schematic cross-sectional structure diagram of the drainage sleeve of the present invention; Fig.11It is a structural schematic diagram of the mobile device of the present invention; Fig.12 It is a schematic structural diagram of the threaded sleeve of the present invention.

[0018] Among them: 1. protection compartment; 2. front cover; 3. battery; 4. moving device; 5. heat pipe; 6. cooling device; 7. liquid storage tank; 8. cooling tank; 9. water pump; 10. bellows; 11. guide pipe; 12. drainage sleeve; 401. fixing plate; 402. placement rack; 403. moving block; 404. positioning block; 405. first support rod; 406. second support rod; 407. threaded sleeve; 408. threaded rod; 409. first adjusting rod; 410. second adjusting rod; 601. first cooling plate; 602. second cooling plate; 603. baffle; 604. connecting plate; 605. locking column; 606. rubber sleeve. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments, unless otherwise specified, are conventional methods, and the materials, reagents, etc. used in the following embodiments, unless otherwise specified, can all be obtained from commercial channels.

[0020] Embodiment: The present invention provides as Figure 1 The electric energy conversion device of a photovoltaic energy storage microgrid system shown includes: A protection compartment 1 is provided with an openable front cover 2 on one side of the protection compartment 1, and the middle part of the protection compartment 1 is recessed inward to form a placement cavity, a plurality of batteries 3 are arranged inside the placement cavity, and a liquid storage tank 7 is also arranged inside the placement cavity, a water pump 9 for sucking coolant is arranged below the liquid storage tank 7, and a heat pipe 5 is arranged at the output end of the water pump 9.

[0021] As can be seen from the above, during use, in the daily use of the smart microgrid, the electric energy produced by the photovoltaic panel is stored in the battery 3 through the wire. When the battery 3 is charged and discharged, the temperature of the battery 3 rises, and the water pump 9 is turned on. The pumping end of the water pump 9 sucks the coolant inside the liquid storage tank 7, so that the coolant flows through the heat pipe 5, so that the heat pipe 5 absorbs the heat generated by the battery 3 and then returns to the inside of the liquid storage tank 7, forming a circulation of the coolant.

[0022] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 8 As shown, a plurality of cooling devices 6 are arranged outside the plurality of batteries 3, and a moving device 4 for driving the batteries 3 to move is arranged between the plurality of batteries 3 and the placement cavity; The cooling device 6 includes two first cooling plates 601 arranged on both sides of the battery 3, a detachable second cooling plate 602 is arranged on the top of the two first cooling plates 601, a cold air cavity for storing the heat pipe 5 is arranged in the middle of the first cooling plate 601, and a conveying cavity adapted to the heat pipe 5 is arranged in the middle of the second cooling plate 602, and an inclined surface is arranged at the bottom of the inner wall of the conveying cavity, two baffles 603 are arranged on the opposite side of the two first cooling plates 601, and a plurality of air outlets are arranged on the baffle 603, and the first cooling plate 601 and the second cooling plate 602 are arranged at the same time. The material is made of a material with good thermal conductivity, and the first cooling plate 601 and the second cooling plate 602 are spliced ​​to form an inverted U-shaped cooling jacket, and the cold air released by the heat pipe 5 is evenly transported to the outside of the battery 3 through the air outlet holes on the baffle 603, so that the cold air of the cooling jacket is evenly surrounded on the top and both sides of the battery 3, further improving the effect of the cold zone, and the water inside the second cooling plate 602 can be transported to the inside of the first cooling plate 601 through the inclined surface, so as to prevent the water vapor in the air from condensing into water droplets and then falling on the electrodes of the battery 3, thereby damaging the battery 3; The heat conduction pipe 5 is composed of a conveying pipe, a first surround pipe and a second surround pipe. The first surround pipe is arranged in the conveying cavity, and the second surround pipe is arranged in the cold air cavity. Both ends of the second conveying pipe are connected to the ends of the first conveying pipe. A corrugated pipe 10 is arranged between two adjacent second surround pipes. Quick-release joints are arranged at both ends of the corrugated pipe 10. The two adjacent second surround pipes can be separated by the quick-release joints of the corrugated pipe 10.

[0023] A cooling box 8 is arranged above the liquid storage box 7, and a guide pipe 11 is fixed inside the cooling box 8. The bottom of the guide pipe 11 extends to the outside of the cooling box 8 and is connected to the liquid storage box 7, and the top of the guide pipe 11 extends upward to the upper half of the cooling box 8.

[0024] By adopting the above technical solution: During use, when the battery 3 needs to be cooled, the coolant passes through the first surround tube, so that the cold air released by the first surround tube is evenly discharged through the air outlet holes on the baffle 603, so that the cold air cools the side of the battery 3 comprehensively and evenly, and then the coolant passes through the second surround tube, so that the cold air of the second surround tube cools the top of the battery 3 through the second cooling plate 602, and the coolant is transported to the interior of the cooling box 8 through the transmission pipe, and the interior of the cooling box 8 is filled and cooled. When the liquid level of the coolant inside exceeds the height of the guide tube 11, the coolant flows back into the interior of the liquid storage tank 7 through the guide tube 11, so that the coolant can be quickly cooled without a compressor, thereby improving the water cooling effect.

[0025] Secondly, refer to Figure 2 , Figure 3 , Fig.11 and Fig.12 As shown, the mobile device 4 includes a fixed plate 401 fixed on the protective compartment 1, and a plurality of placement racks 402 are arranged above the fixed plate 401 for placing the battery 3. A placement groove adapted for the battery 3 is arranged in the middle of the placement rack 402, and ventilation grooves are opened on the placement groove for heat dissipation of the battery 3, and an adjustment mechanism is arranged between the fixed plate 401 and the plurality of placement racks 402.

[0026] The adjusting mechanism includes a positioning block 404 fixed on the fixed plate 401 and a moving block 403 slidably mounted on the fixed plate 401, a first support rod 405 is fixed on the top of the moving block 403, a second support rod 406 is fixed on the top of the positioning block 404, two rotatable second adjusting rods 410 are arranged on the first support rod 405, and two rotatable first adjusting rods 409 are arranged on the second support rod 406, an end of the second adjusting rod 410 away from the first support rod 405 is hinged to an end of the first adjusting rod 409 away from the second support rod 406, a sliding groove adapted to the moving block 403 is arranged on the top of the fixed plate 401, the two first adjusting rods 409 are staggered, and the two first adjusting rods 409 can rotate around the axis of the second support rod 406, and the first adjusting rod 409 and the second adjusting rod 410 are rotatably connected via a connecting shaft.

[0027] Two threaded sleeves 407 are provided on the opposite sides of the two first adjusting rods 409, a rotatable threaded rod 408 is provided between the two threaded sleeves 407, an adjusting wheel for people to grasp is provided in the middle of the threaded rod 408, threaded holes matching the threaded rod 408 are provided on the opposite sides of the two threaded sleeves 407, and both ends of the threaded rod 408 are screwed into the threaded holes.

[0028] By adopting the above technical solution: When in use, the threaded rod 408 is rotated, and the threaded rod 408 cooperates with the threaded holes of the two threaded sleeves 407, so that the threaded rod 408 drives the two threaded sleeves 407 to move, so that the spacing between the two threaded sleeves 407 becomes smaller, and the threaded sleeves 407 drive the spacing between the two first adjustment rods 409 to become smaller through the connecting shaft. The first adjustment rod 409 drives the second adjustment rod 410 to rotate around the axis of the first support rod 405 through the connecting shaft, so that the second adjustment rod 410 drives the placement rack 402 to move through the first support rod 405, and the placement rack 402 drives the battery 3 to move, and the spacing between multiple batteries 3 is adjusted to become smaller, thereby avoiding that the spacing between multiple batteries 3 is too large, and the heat generated by the battery 3 during work affects each other, further improving the cooling effect of water cooling.

[0029] Again, reference Figure 4 and Figure 7 As shown, the second cooling plate 602 is composed of two fixed frames, two locking posts 605 are symmetrically fixed on the top of the two fixed frames, two limiting balls are fixed on the top of the two locking posts 605, and two adjacent locking posts 605 are commonly sheathed with rubber sleeves 606.

[0030] The second cooling plate 602 is composed of two fixed frames, two connecting plates 604 are fixed at both ends of the fixed frames, and one end of the connecting plate 604 away from the fixed frame is provided with a wedge block. The top of the first cooling plate 601 is provided with a wedge groove adapted to the wedge block.

[0031] By adopting the above technical solution: When in use, push the quick-release connector to separate the multiple bellows 10 from the second surrounding tube, remove the cooling sleeve formed by the first cooling plate 601 and the second cooling plate 602 from the battery 3, pull the rubber sleeve 606 to separate the rubber sleeve 606 from the locking column 605, pull the two first cooling plates 601 to separate the two first cooling plates 601 and the two fixing frames, then push the fixing frame upward to drive the connecting plate 604 to move upward, separate the connecting plate 604 from the first cooling plate 601, thereby separating the first cooling plate 601 and the second cooling plate 602 from the first surrounding tube and the second surrounding tube, so that people can replace the first cooling plate 601, the second cooling plate 602, the first surrounding tube and the second surrounding tube, thereby increasing the convenience of the device.

[0032] Finally, reference Figure 8 , Fig. 9 and Fig.10 As shown, a drainage sleeve 12 is also fixed inside the cooling box 8, and a slot matched with the guide pipe 11 is provided at the bottom of the drainage sleeve 12, and a drainage gap is provided after the bottom of the drainage sleeve 12 extends to the lower part of the inner wall of the cooling box 8, and a water outlet gap is provided after the top of the guide pipe 11 extends to the inside of the slot, and a slot matched with the guide pipe 11 is provided at the bottom of the drainage sleeve 12, and the drainage sleeve 12 is sleeved on the outside of the guide pipe 11, and the drainage sleeve 12 and the guide pipe 11 form a communicating vessel through the water outlet gap.

[0033] By adopting the above technical solution: During use, when the drainage sleeve 12 is sleeved on the outside of the guide tube 11 and the liquid level of the coolant is higher than the guide tube 11, the coolant flows into the liquid storage tank 7 through the guide tube 11, and the coolant inside the cooling box 8 becomes less, so that the pressure inside the cooling box 8 becomes smaller, and a siphon is generated inside the cooling box 8, so that all the coolant inside the cooling box 8 is discharged into the liquid storage tank 7, and the coolant inside the liquid storage tank 7 is quickly replenished, avoiding too little cooling inside the liquid storage tank 7, causing the water pump 9 to run idle, and further increasing the service life of the water pump 9.

[0034] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An electric energy conversion device for a photovoltaic energy storage microgrid system, characterized in that: include: A protection chamber (1), wherein a front cover (2) that can be opened and closed is arranged on one side of the protection chamber (1), and the middle portion of the protection chamber (1) is recessed inwardly to form a placement cavity, a plurality of batteries (3) are arranged inside the placement cavity, and a liquid storage tank (7) is also arranged inside the placement cavity, a water pump (9) for sucking coolant is arranged below the liquid storage tank (7), and a heat conduction pipe (5) is arranged at the output end of the water pump (9); A plurality of cooling devices (6) are arranged outside the plurality of batteries (3), and a moving device (4) for driving the batteries (3) to move is arranged between the plurality of batteries (3) and the placement cavity; The cooling device (6) comprises two first cooling plates (601) arranged on both sides of the battery (3); a detachable second cooling plate (602) is arranged on the top of the two first cooling plates (601); a cold air cavity for storing the heat conducting pipe (5) is arranged in the middle of the first cooling plate (601); a conveying cavity adapted to the heat conducting pipe (5) is arranged in the middle of the second cooling plate (602); an inclined surface is arranged at the bottom of the inner wall of the conveying cavity; two baffles (603) are arranged on the opposite sides of the two first cooling plates (601); and a plurality of air outlet holes are arranged on the baffles (603); The heat conduction pipe (5) is composed of a conveying pipe, a first surrounding pipe and a second surrounding pipe, the first surrounding pipe is arranged in the conveying cavity, the second surrounding pipe is arranged in the cold air cavity, both ends of the second conveying pipe are connected to the ends of the first conveying pipe, and a corrugated pipe (10) is arranged between two adjacent second surrounding pipes.

2. The electric energy conversion device of a photovoltaic energy storage microgrid system according to claim 1, characterized in that: The second cooling plate (602) is composed of two fixed frames spliced ​​together, two locking posts (605) are symmetrically fixed on the top of the two fixed frames, two limiting balls are fixed on the top of the two locking posts (605), and two adjacent locking posts (605) are commonly sheathed with a rubber sleeve (606) on their exteriors.

3. The electric energy conversion device of a photovoltaic energy storage microgrid system according to claim 1, characterized in that: The second cooling plate (602) is composed of two fixed frames spliced ​​together, two connecting plates (604) are fixed at both ends of the fixed frame, and one end of the connecting plate (604) away from the fixed frame is provided with a wedge block, and the top of the first cooling plate (601) is provided with a wedge groove adapted to the wedge block.

4. The electric energy conversion device of a photovoltaic energy storage microgrid system according to claim 1, characterized in that: The mobile device (4) comprises a fixing plate (401) fixed on the protection compartment (1); a plurality of placement racks (402) for facilitating the placement of batteries (3) are arranged above the fixing plate (401); a placement groove adapted for the batteries (3) is arranged in the middle of the placement rack (402); and ventilation grooves are provided on the placement groove for facilitating heat dissipation of the batteries (3); and an adjustment mechanism is arranged between the fixing plate (401) and the plurality of placement racks (402).

5. The electric energy conversion device of the photovoltaic energy storage microgrid system according to claim 4, characterized in that: The adjustment mechanism comprises a positioning block (404) fixed on the fixed plate (401) and a moving block (403) slidably mounted on the fixed plate (401); a first support rod (405) is fixed on the top of the moving block (403); a second support rod (406) is fixed on the top of the positioning block (404); two rotatable second adjustment rods (410) are arranged on the first support rod (405); two rotatable first adjustment rods (409) are arranged on the second support rod (406); one end of the second adjustment rod (410) away from the first support rod (405) is hinged to one end of the first adjustment rod (409) away from the second support rod (406); and a sliding groove matched with the moving block (403) is arranged on the top of the fixed plate (401).

6. The electric energy conversion device of the photovoltaic energy storage microgrid system according to claim 5, characterized in that: Two threaded sleeves (407) are arranged on the opposite sides of the two first adjustment rods (409), a rotatable threaded rod (408) is arranged between the two threaded sleeves (407), and an adjustment wheel that is convenient for people to grasp is arranged in the middle of the threaded rod (408).

7. The electric energy conversion device of a photovoltaic energy storage microgrid system according to claim 1, characterized in that: A cooling box (8) is arranged above the liquid storage box (7), a flow guide pipe (11) is fixed inside the cooling box (8), and the bottom of the flow guide pipe (11) extends to the outside of the cooling box (8) and is then connected to the liquid storage box (7).

8. The electric energy conversion device of the photovoltaic energy storage microgrid system according to claim 7, characterized in that: A drainage sleeve (12) is also fixed inside the cooling box (8); a slot matching the drainage pipe (11) is provided at the bottom of the drainage sleeve (12); a drainage gap is provided after the bottom of the drainage sleeve (12) extends to the lower part of the inner wall of the cooling box (8); a water outlet gap is provided after the top of the drainage pipe (11) extends to the inside of the slot; a slot matching the drainage pipe (11) is provided at the bottom of the drainage sleeve (12); and the drainage sleeve (12) is sleeved on the outside of the drainage pipe (11).

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