CN111120227A - Energy storage device and photovoltaic system - Google Patents
Energy storage device and photovoltaic system Download PDFInfo
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- CN111120227A CN111120227A CN201911319988.7A CN201911319988A CN111120227A CN 111120227 A CN111120227 A CN 111120227A CN 201911319988 A CN201911319988 A CN 201911319988A CN 111120227 A CN111120227 A CN 111120227A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 76
- 238000010248 power generation Methods 0.000 claims description 19
- 239000000126 substance Substances 0.000 claims description 16
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 239000011150 reinforced concrete Substances 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 25
- 238000005381 potential energy Methods 0.000 abstract description 13
- 230000005484 gravity Effects 0.000 description 8
- 239000000725 suspension Substances 0.000 description 8
- 230000005611 electricity Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000007906 compression Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G3/00—Other motors, e.g. gravity or inertia motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F19/00—Hoisting, lifting, hauling or pushing, not otherwise provided for
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/10—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power including a supplementary source of electric power, e.g. hybrid diesel-PV energy systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
The invention provides an energy storage device and a photovoltaic system, wherein the energy storage device comprises: the mass block comprises a hoisting assembly, a motor and a generator, wherein the length direction of the mass block comprises a first end and a second end which are arranged oppositely, the first end is rotatably connected with a supporting table, a pulley is arranged on a supporting tower, and the other end of a traction rope bypasses the pulley to be connected with the second end of the mass block. The motor and the generator are respectively connected with the wire spool in a separable rotating way. According to the energy storage device provided by the embodiment of the invention, the mass block is hoisted through the traction rope on the wire spool, so that the mass block stores gravitational potential energy when power is surplus, and the energy storage device is simple in structure and low in cost; and when the mass block is pulled up, the mass block is supported on the support table, and compared with the method that the mass block is suspended at high altitude through a crane boom, the energy storage device provided by the embodiment of the invention has higher safety.
Description
Technical Field
The invention relates to the technical field of photovoltaic energy storage, in particular to an energy storage device and a photovoltaic system.
Background
At present, with the remarkable problem of energy shortage, countries in the world pay more and more attention to clean and pollution-free renewable energy sources, and power generation systems using solar energy, wind energy and the like as renewable energy sources are rapidly developed. However, with the large-scale application of such power generation systems, when the power is excessive, the power generation system often reduces the power generation amount, abandons the light and wind, and wastes resources.
In the prior art, in order to reduce the phenomenon that light and wind are abandoned and improve the utilization rate of new energy, an energy storage device is increasingly emphasized. Taking gravity energy storage as an example, the existing gravity energy storage device basically lifts a mass block to a certain height when power is surplus, and fixes the mass block at a corresponding position by building a placing platform or utilizing a crane boom; when the power is in short supply (for example, at night), the mass block is put down, and the gravitational potential energy is utilized to generate power.
However, the construction of a placement platform with a certain height requires extremely high construction cost, which results in higher cost of the whole energy storage device; and the gravity energy storage device of the crane boom is adopted, so that the mass block is easy to deform in the process of long-term hoisting and pulling, and certain potential safety hazards exist.
Disclosure of Invention
In view of this, the invention provides an energy storage device and a photovoltaic system, in order to solve the problems of high manufacturing cost, high cost and low safety of the conventional energy storage device.
In order to solve the above problems, the present invention discloses an energy storage device, including: a hoist assembly, a motor and a generator; wherein the content of the first and second substances,
the hoisting assembly comprises a support platform, a mass block, a support tower and a wire spool;
the length direction of the mass block comprises a first end and a second end which are oppositely arranged, and the first end of the mass block is rotatably connected with the support platform;
the supporting tower is arranged on one side, close to the wire spool, of the supporting table, and a pulley is arranged on the supporting tower;
a traction rope is wound on the wire spool, one end of the traction rope is fixed on the wire spool, and the other end of the traction rope is connected with the second end of the mass block by winding the pulley;
the motor and the generator are respectively connected with the wire spool in a separable rotating mode.
Optionally, the mass block includes: a first position in a final lowering state and a second position in a final pulling state; wherein the content of the first and second substances,
the motor is rotationally coupled to the spool and the generator is decoupled from the spool upon rotation of the mass from the first position to the second position;
in the case where the mass is rotated from the second position to the first position, the motor is separated from the wire spool, and the generator is rotatably connected to the wire spool.
Optionally, the hoist assembly further comprises: a first gear, a second gear, and a third gear; wherein the content of the first and second substances,
the first gear is coaxial with the wire spool, the second gear is coaxial with the motor, and the third gear is coaxial with the generator;
the second gear and the third gear are respectively in a meshed state or a separated state with the first gear.
Optionally, the size of the first gear is larger than the size of the second gear and the size of the third gear.
Optionally, the hoist assembly further comprises: a first elastic member and a first protective post surrounding the first elastic member; wherein the content of the first and second substances,
the first elastic member is disposed at a position of the support tower near the second end.
Optionally, the hoist assembly further comprises: the second elastic piece and a second protection column surrounding the second elastic piece; wherein the content of the first and second substances,
the second elastic piece is arranged on one side, far away from the wire spool, of the supporting platform, and the second end of the mass block abuts against the second elastic piece under the condition that the mass block is located at the first position.
Optionally, the supporting table and the second elastic member are arranged on an installation table, the installation table is arranged between the supporting table and the second elastic member in an inclined plane, and the supporting table is higher than the second elastic member.
Optionally, a hemispherical groove is formed in the support platform, a hemispherical protrusion matched with the groove is arranged at the first end of the mass block, and the protrusion is embedded in the groove.
Optionally, lubricating oil is smeared between the protrusion and the groove.
Optionally, a waterproof piece is further embedded between the protrusion and the groove, and the waterproof piece is arranged at the outer edge of the groove.
Optionally, the hoist assembly further comprises: a support bar;
a rotating hole is formed in the position, close to the first end, of the mass block;
the support rod is arranged in the rotary hole in a penetrating mode, and two ends of the support rod are supported on the support platform.
Optionally, the hoist assembly further comprises: a third elastic member; wherein the content of the first and second substances,
and two ends of the supporting rod are respectively supported on the supporting platform through the third elastic piece.
Optionally, the hoist assembly further comprises: a bearing; wherein the content of the first and second substances,
the bearing is embedded in the rotating hole, and the supporting rod penetrates through the bearing hole of the bearing.
Optionally, the mass has a greater weight proximate the second end than proximate the first end.
Optionally, the mass block includes a housing, and the housing is filled with reinforced concrete.
Optionally, the mass block includes a plurality of sub mass blocks, and the sub mass blocks are arranged at intervals;
the supporting tower is provided with a plurality of pulleys, and one sub-mass block corresponds to one wire spool and one pulley.
Optionally, the motor has a pair, a pair of the motors being arranged coaxially;
the generators are in a pair, and the generators are coaxially arranged;
the plurality of hoist assemblies are disposed between a pair of the motors and a pair of the generators.
In another aspect, the present invention also discloses a photovoltaic system, which includes: a photovoltaic power generation device and the energy storage device; wherein the content of the first and second substances,
the photovoltaic power generation device is connected with the motor of the energy storage device.
The invention has the following advantages:
the embodiment of the invention provides an energy storage device, when energy needs to be stored, a generator is separated from a wire spool, a motor is rotationally connected with the wire spool, the motor drives the wire spool to rotate, a traction rope pulls up a second end of a mass block to a position close to a support tower, and the mass block is fixed at a corresponding position by locking the wire spool to store gravitational potential energy; when needs electricity generation, motor and wire reel separation, the generator rotates with the wire reel to be connected, unblock wire reel, and the quality piece can stimulate the haulage rope motion under the effect of gravity, and the haulage rope can drive the wire reel and rotate, and the wire reel rotates and can drive the generator and rotate, and then reaches the purpose of electricity generation. According to the energy storage device provided by the embodiment of the invention, the mass block is hoisted through the traction rope on the wire spool, so that the mass block stores gravitational potential energy when power is surplus, and the energy storage device is simple in structure and low in cost; and when the mass block is pulled up, the mass block is supported on the support table, and compared with the method that the mass block is suspended at high altitude through a crane boom, the energy storage device provided by the embodiment of the invention has higher safety.
Drawings
FIG. 1 is a first schematic structural diagram of an energy storage device of the present invention;
FIG. 2 is a front view of the connection between the support platform and the mass according to the present invention;
FIG. 3 is a side view of the connection of the support platform and the mass of the present invention;
fig. 4 is a schematic structural diagram of an energy storage device according to the present invention.
1-an energy storage device, 10-a hoisting assembly, 101-a support platform, 102-a mass block, 1021-a first end, 1022-a second end, 103-a support tower, 104-a wire reel, 1041-a locking pin, 105-a pulley, 106-a traction rope, 107-a first elastic member, 108-a first protection column, 109-a second elastic member, 110-a second protection column, 111-a support rod, 112-a third elastic member, 113-a bearing, 114-a first gear, 115-a second gear, 116-a third gear, 20-a motor, 30-a generator, 40-a mounting platform and 2-a photovoltaic power generation device.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1, a first structural diagram of an energy storage device according to an embodiment of the present invention is shown. As shown in fig. 1, an energy storage device 1 according to an embodiment of the present invention includes: the suspension and traction system comprises a suspension and traction assembly 10, a motor 20 and a generator 30, wherein the suspension and traction assembly 10 comprises a support platform 101, a mass 102, a support tower 103 and a wire spool 104, the mass 102 is a heavy object with a certain weight, and energy is stored by changing a position state.
Specifically, the length direction of the mass 102 includes a first end 1021 and a second end 1022 which are oppositely arranged, the first end 1021 of the mass 102 is rotatably connected with the support table 101, and the mass 102 can rotate relative to the support table 101, so as to change the position state of the mass 102; the support tower 103 is arranged on one side of the support platform 101 close to the wire spool 104, a pulley 105 is arranged on the support tower 103, a traction rope 106 is wound on the wire spool 104, one end of the traction rope 106 is fixed on the wire spool 104, the other end of the traction rope is connected with the second end 1022 of the mass block 102 by passing through the pulley 105, the traction rope 106 has a traction force on the mass block 102, and the mass block 102 can rotate relative to the support platform 101 under the action of the traction force. The motor 20 and the generator 30 are respectively connected to the wire spool 104 in a detachable rotatable manner.
When energy needs to be stored, the generator 30 is separated from the wire spool 104, the motor 20 is rotationally connected with the wire spool 104, the motor 20 drives the wire spool 104 to rotate, the second end 1022 of the mass block 102 is pulled up to a position close to the support tower 103 by the traction rope 106, and the mass block 102 is fixed at a corresponding position by locking the wire spool 104 to store gravitational potential energy; when power generation is needed, the motor 20 is separated from the wire spool 104, the generator 30 is rotationally connected with the wire spool 104 to unlock the wire spool 104, the mass block 102 can pull the pulling rope 106 to move under the action of gravity, the pulling rope 106 can drive the wire spool 104 to rotate, the wire spool 104 rotates to drive the generator 30 to rotate, and then the purpose of power generation is achieved.
In the energy storage device provided by the embodiment of the invention, the mass block 102 is hung and pulled by the traction rope 106 on the wire spool 104, so that the first end 1021 of the mass block 102 rotates around the support table 101, and particularly when the electric power is surplus, the surplus electric power is converted into gravitational potential energy to be stored, and the energy storage device is simple in structure and low in cost; when the mass block 102 is pulled up, the mass block 102 is directly supported on the support table 101, the mass block 102 does not need to be lifted, and the operation is simple; compared with the method that the mass block is suspended in the high altitude through the crane arm, the energy storage device provided by the embodiment of the invention has higher safety.
In practical applications, the motor 20 may be connected to a photovoltaic power station or a wind power station, and when the power is rich, the power station may transmit the excess power to the motor 20, and the motor 20 drives the mass block 102 to rotate, so as to store the excess power.
In practical applications, the spool 104 is provided with a locking structure, and when the mass 102 rotates to a desired position, the spool 104 can be locked by the locking structure to fix the mass 102. In the embodiment of the present invention, the locking structure on the wire spool 104 is a locking pin 1041, and the locking or unlocking state of the wire spool 104 is changed by controlling the locking pin 1041. During the process of pulling the mass 102, the rotation of the spool 104 is mainly driven by the motor 20, and during the process of lowering the mass 102, the rotation of the spool 104 is driven by the mass 102 pulling the pulling rope 106.
In the embodiment of the present invention, the mass block 102 includes: in the first position of the final lowering state and the second position of the final pulling state, when the mass 102 rotates from the first position to the second position, the mass 102 is pulled up, wherein the motor 20 is rotationally connected to the wire spool 104, the generator 30 is separated from the wire spool 104, the wire spool 104 rotates and the pulling rope 106 is wound under the driving of the motor 20, so that the pulling rope 106 pulls the second end 1022 of the mass 102 to rotate, thereby pulling the mass 102 to vertically stand on the support table 101 for the purpose of storing energy. Under the condition that the mass block 102 rotates from the second position to the first position, the mass block 102 is put down and releases gravitational potential energy, the motor 20 is separated from the wire spool 104, the generator 30 is rotatably connected with the wire spool 104, the mass block 102 starts to rotate under the action of self gravity, at the moment, the second end 1022 of the mass block 102 pulls the traction rope 106, the traction rope 106 drives the wire spool 104 to rotate, the wire spool 104 drives the generator 30 to rotate, the generator 30 starts to generate electricity, so that the previously stored energy can be converted into electric energy to be released, when the electric power is surplus, the surplus electric energy is stored, when the electric power is in short supply, the purpose of releasing the electric energy is achieved, and the utilization rate of the energy is improved.
In order to prevent the mass 102 from exceeding the vertical position and causing energy loss after reaching the second position, the hoist assembly 10 further includes: a first elastic member 107 and a first protection column 108 surrounding the first elastic member 107, the first elastic member 107 being disposed at a position near the second end 1022 of the support tower 103, the first elastic member 107 can function as a position limiting mass 102, and at the same time, when the mass 102 rotates to the second position, the first elastic member 107 is compressed. When the mass 102 rotates from the second position to the first position, the first elastic member 107 reacts to the mass 102, so that an initial driving force is applied to the mass 102, and the mass 102 starts to pull the pull string 106 to rotate. The first protection pillar 108 protects the first elastic member 107 to prevent the first elastic member 107 from being compressed excessively to be deformed permanently, and meanwhile, the first protection pillar 108 can also limit the position.
According to the energy storage device provided by the embodiment of the invention, the first elastic element 107 is arranged, so that the function of limiting the mass block 102 can be achieved, a certain amount of energy can be stored through the first elastic element 107, when the mass block 102 needs to rotate from the second position to the first position, a driving force is provided for the mass block 102, the mass block 102 is helped to rotate automatically, the automation degree of the whole energy storage device is improved, the structure is simple, additional power is not needed, and the cost is saved.
In the embodiment of the present invention, the hoist assembly 10 further includes: a second elastic member 109 and a second protection pillar 110 surrounding the second elastic member 109, the second elastic member 109 being disposed on a side of the support platform 101 away from the spool 104, and a second end 1022 of the mass 102 abuts against the second elastic member 109 when the mass 102 is in the first position. The mass 102 compresses the second elastic member 109, the second elastic member 109 accumulates elastic potential energy, and the second elastic member 109 can act against the mass 102 when the mass 102 is pulled next time, so that the mass 102 is pulled from the first position, and the initial acting force of the motor 20 is reduced. The second protection pillar 110 protects the second elastic member 109, and prevents the second elastic member 109 from being deformed due to over-compression.
In the embodiment of the invention, the supporting table 101 and the second elastic member 109 are arranged on the mounting table 40, the mounting table 40 can be arranged in a plane, or can be arranged in an inclined plane between the supporting table 101 and the second elastic member 109, and the supporting table 101 is higher than the second elastic member 109, and the inclination angle of the inclined plane can be 0-90 degrees, so that the downward amplitude of the mass block 102 is larger, more gravitational potential energy is released, and the power generation amount is improved; and more gravitational potential energy can be stored in the next pulling process.
In practical applications, the support platform 101 may be rotatably connected to the first end 1021 of the mass block 102 in a variety of ways, in an embodiment of the present invention, a hemispherical groove is formed in the support platform 101, a hemispherical protrusion matching with the groove is formed at the first end 1021 of the mass block 102, the protrusion is embedded in the groove, and the protrusion can rotate around the groove. In the embodiment of the invention, the contact area between the mass block 102 and the support table 101 can be increased by matching the protrusions and the grooves, so that the ground pressure born by the support table 101 is reduced, and the service life of the hoisting assembly 10 is prolonged.
In practical application, in order to reduce the friction force when the protrusion rotates around the groove, lubricating oil is coated between the protrusion and the groove; simultaneously in order to prevent that lubricating oil from receiving the erosion of rainwater etc, still inlay between arch and the recess and be equipped with waterproof piece, waterproof piece sets up the outer edge department at the recess to fill the gap between arch and the recess, prevent that rainwater etc. from getting into between arch and the recess, cause dilution or erosion to lubricating oil.
In practical application, the waterproof part can be a rubber pad, and the rubber pad is weaker, so that the waterproof part can deform along with the rotation of the protrusion while playing a waterproof role, and the resistance to the protrusion is smaller.
Referring to fig. 2, a front view of a connection relationship between a support platform and a mass according to an embodiment of the present invention is shown; referring to FIG. 3, a side view of the connection between the support platform and the proof mass according to an embodiment of the present invention is shown. In practical applications, after the protrusion rotates around the groove for a long time, the lubricant is easily squeezed to the outside, and the friction between the protrusion and the groove is increased. In order to avoid this, as shown in fig. 2 to 3, the hoist assembly 10 further includes: the supporting rod 111 and the first end 1021 of the mass block 102 are provided with a rotating hole, the supporting rod 111 penetrates through the rotating hole, two ends of the supporting rod 111 are supported on the supporting platform 101, the mass block 102 can rotate around the supporting rod 111, pressure of the protrusion on the groove is reduced, friction force between the protrusion and the groove can be reduced, and resistance of the mass block 102 in the rotating process is reduced.
Optionally, the position of the rotation hole coincides with the position of the center of the hemispherical protrusion to ensure that the mass 102 rotates around the support rod 111 during the rotation process of the support platform 101, and the support rod 111 and the support platform 101 can share the weight of the mass 102 at the same time, so that the rotation resistance of the mass 102 is smaller.
In an embodiment of the present invention, in order to facilitate the mass block 102 to automatically adjust the position relationship with the support platform 101, the suspension and pull assembly 10 further includes: the third elastic element 112 and the two ends of the supporting rod 111 are respectively supported on the supporting platform 101 through the third elastic element 112, and the third elastic element 112 can adjust the position of the mass block 102 under the action of the gravity of the mass block 102, so that the mass block 102 is located at a position where the friction force between the mass block 102 and the supporting platform 101 is as small as possible, and the rotation resistance of the mass block 102 is reduced.
In the embodiment of the present invention, the hoist assembly 10 further includes: the bearing 113, bearing 113 are inlayed and are established in the rotating hole, and bracing piece 111 wears to establish in the bearing hole of bearing 113, compare in that bracing piece 111 directly contacts with the rotating hole, and the rotatory frictional force of quality piece 102 for bracing piece 111 is littleer, and the rotatory resistance of quality piece 102 is also littleer, reaches the purpose of energy saving.
In the embodiment of the invention, the supporting rod 111 is arranged, so that the mass block 102 can be prevented from inclining in the moving process, and the moving process of the mass block 102 is more stable and reliable; the pressure between the mass 102 and the support 101 is reduced and the friction between the mass 102 and the support 101 is reduced. By arranging the third elastic members 112 at the two ends of the supporting rod 111, the stress of the supporting rod 111 and the supporting platform 101 can be balanced, and the stability of the mass block 102 in the rotating process is further improved.
In practice, to further improve energy utilization, the mass 102 has a greater weight near the second end 1022 than near the first end 1021, for example, the second end 1022 of the mass 102 is made of a denser material and the first end 1021 is made of a less dense material. Therefore, when the mass block 102 is lifted from the first position to the second position, larger gravitational potential energy can be accumulated, and further higher power generation can be provided, and the energy storage capacity of the whole energy storage device 1 is increased.
In practical applications, in order to increase the energy storage capacity of the energy storage device 1, the weight of the mass block 102 is required to be as high as possible, for example, the mass block 102 may be made of steel. However, because the manufacturing cost of the steel is high, the mass block 102 can also be made of a shell and a sand-water mixture filled in the shell, the sand-water mixture has lower cost and more abundant resources under the condition of meeting the weight requirement of the mass block 102, and in addition, the shell can also be filled with reinforced concrete, so that the strength of the mass block 102 is higher under the condition of meeting the weight requirement. In an actual production process, the mass block 102 may also be directly stacked by reinforced concrete, and the specific material of the mass block 102 is not limited in the embodiment of the present invention.
In practical applications, for the mass block 102 including the housing, in order to prevent the housing from corroding under the long-term action of the outside air, in the embodiment of the present invention, the material of the housing may be stainless steel; or, the outer side of the shell is coated with the antirust coating, and the antirust coating can be regularly brushed on the shell in the using process of the device so as to prevent the antirust coating from falling off.
In the embodiment of the present invention, the hoist assembly 10 further includes: the first gear 114 is coaxial with the wire spool 104, and when the wire spool 104 rotates, the first gear 114 is driven to rotate; the second gear 115 is coaxial with the motor 20, and when the motor 20 rotates, the second gear 115 is driven to rotate; the third gear 116 is coaxial with the generator 30, and when the third gear 116 rotates, the generator 30 is driven to rotate.
In practical applications, the second gear 115 and the third gear 116 are respectively engaged with or disengaged from the first gear 114. Specifically, when the mass block 102 needs to be pulled up, so that the mass block 102 rotates from the first position to the second position, the second gear 115 is engaged with the first gear 114, the third gear 116 is separated from the first gear 114, the motor 20 drives the second gear 115 to rotate, the second gear 115 drives the first gear 114 to rotate, the first gear 114 drives the wire spool 104 to rotate, the wire spool 104 rotates and winds the traction rope 106, and finally the mass block 102 is pulled up to be in the second position.
When the mass block 102 needs to be lowered, in the process of rotating the mass block 102 from the second position to the first position, the second gear 115 and the first gear 114 are in a separated state, the third gear 116 and the first gear 114 are in a meshed state, the mass block 102 rotates, the pulling rope 106 is pulled, the pulling rope 106 pulls the wire spool 104 to rotate, the wire spool 104 rotates to drive the first gear 114 to rotate, the first gear 114 rotates to drive the third gear 116 to rotate, and the third gear 116 rotates to drive the generator 30 to rotate, so that the purpose of generating power is achieved.
In the embodiment of the present invention, the size of the first gear 114 is larger than the size of the second gear 115 and the third gear 116, so that the rotation speed of the wire spool 104 can be reduced in the whole process of energy storage or power generation, thereby reducing the rotation speed of the mass block 102 and improving the rotation stability of the mass block 102.
In practical applications, in order to relieve the pressure of the support tower 103, the mass block 102 includes a plurality of sub-mass blocks, the sub-mass blocks are arranged at intervals, the wire spool 104 is provided with a plurality of wire pulleys 105, and one sub-mass block corresponds to one wire spool 104 and one wire pulley 105. In the process of energy storage, a plurality of sub-masses can be pulled up one by one, so that the weight of one mass 102 can be distributed to the plurality of sub-masses, each sub-mass corresponds to one wire spool 104, the traction rope 106 on each wire spool 104 is connected with one sub-mass by passing through one pulley 105, the pressure of the supporting tower 103 can be reduced, and the situation that the mass 102 is too heavy to be pulled up difficultly is avoided.
Referring to fig. 4, a structural schematic diagram of an energy storage system according to an embodiment of the present invention is shown. As shown in fig. 4, in the embodiment of the present invention, in order to increase the power storage capacity of the energy storage device 1, there may be a plurality of hoist assemblies 10 in one energy storage device 1, and meanwhile, in order to save cost, there may be only one pair of motors 20, or only one pair of generators 30, where a pair of motors 20 is coaxially disposed, a pair of generators 30 is also coaxially disposed, and a plurality of hoist assemblies 10 are disposed between a pair of motors 20 and a pair of generators 30. The plurality of hoisting assemblies 10 can be driven by the pair of motors 20, and the plurality of hoisting automatic controls 10 can continuously drive the pair of generators 30 to generate electricity, so that the energy storage device can be developed in a large scale according to actual requirements.
Specifically, the plurality of second gears 115 of the plurality of hoist assemblies 10 are coaxially disposed with the pair of motors 20, the plurality of third gears 116 are also coaxially disposed with the pair of generators 30, and each second gear 115 and each third gear 116 correspond to one first gear 114.
In practical applications, when the power is redundant, first, the second gear 115 of the first hoist assembly 10 (the hoist assembly 10 where the first hoisted mass 102 is needed is referred to as the first hoist assembly 10) is meshed with the first gear 114, the spool 104 of the first hoist assembly 10 is driven to rotate by the motor 20, the mass 102 is hoisted from the first position to the second position, the spool 104 of the first hoist assembly 10 is locked, and meanwhile, the second gear 115 of the first hoist assembly 10 is separated from the first gear 114; then, the second gear 115 of the second hoist assembly 10 is meshed with the first gear 114, the spool 104 of the second hoist assembly 10 is driven to rotate by the motor 20, the mass 102 is lifted from the first position to the second position, the spool 104 of the second hoist assembly 10 is locked, and simultaneously, the second gear 115 of the first hoist assembly 10 is separated from the first gear 114; by analogy, the pair of motors 30 can sequentially hoist the plurality of masses 102 from the first position to the second position and fix the masses at the second position, thereby achieving the purpose of large-scale energy storage.
When the power is in short supply, first, the third gear 116 of the first hoist assembly 10 (the hoist assembly 10 where the first lower mass block 102 is located is referred to as the first hoist assembly 10) is meshed with the first gear 114 to unlock the spool 104 of the first hoist assembly 10, the mass block 102 starts to rotate in a downward inclination manner under the action of the first elastic member 107, the traction rope 106 pulls the spool 104 to rotate, the spool 104 drives the first gear 114 to rotate, the first gear 114 drives the third gear 116 to rotate, and finally, the generator 30 is driven to rotate to start generating power. Particularly, when the mass block 102 rotates to a preset time away from the first position, the third gear 116 of the second suspension and pull assembly 10 is engaged with the first gear 114 in advance, the wire spool 104 of the second suspension and pull assembly 10 is unlocked, the mass block 102 of the second suspension and pull assembly 10 rotates from the second position to the first position, the generator 30 is driven to start generating power, and so on, a pair of generators 30 can be generated through a plurality of suspension and pull assemblies 10, the previously stored energy is released, and the purpose of saving energy is achieved.
The next hoisting assembly 10 is put into an operating state in advance within a preset time, so that the generator 30 is prevented from being stopped in the power generation process, and the normal operation of the power utilization equipment is prevented from being influenced. In practical applications, the preset time may be set according to actual conditions, for example, the preset time is 1 minute, and the preset time is not specifically limited in the embodiments of the present invention.
In summary, the energy storage device according to the embodiment of the present invention has the following advantages:
an embodiment of the present invention provides an energy storage device, including: the mass block comprises a hoisting assembly, a motor and a generator, wherein the length direction of the mass block comprises a first end and a second end which are oppositely arranged, the first end is rotatably connected with the support platform, and the mass block can rotate relative to the support platform; the supporting tower is arranged on one side, close to the wire spool, of the supporting table, a pulley is arranged on the supporting tower, a traction rope is wound on the wire spool, one end of the traction rope is fixed on the wire spool, the other end of the traction rope is connected with the second end of the mass block by bypassing the pulley, and the traction rope has traction force on the mass block, so that the mass block can be controlled to rotate relative to the supporting table. The motor and the generator are respectively connected with the wire spool in a separable rotating way. When energy needs to be stored, the generator is separated from the wire spool, the motor is rotationally connected with the wire spool, the motor drives the wire spool to rotate, the second end of the mass block is pulled up to a position close to the support tower by the traction rope, the mass block is fixed at a corresponding position by locking the wire spool, and gravitational potential energy is stored; when needs electricity generation, motor and wire reel separation, the generator rotates with the wire reel to be connected, unblock wire reel, and the quality piece can stimulate the haulage rope motion under the effect of gravity, and the haulage rope can drive the wire reel and rotate, and the wire reel rotates and can drive the generator and rotate, and then reaches the purpose of electricity generation. According to the energy storage device provided by the embodiment of the invention, the mass block is hoisted through the traction rope on the wire spool, so that the mass block stores gravitational potential energy when power is surplus, and the energy storage device is simple in structure and low in cost; and when the mass block is pulled up, the mass block is supported on the support table, and compared with the method that the mass block is suspended at high altitude through a crane boom, the energy storage device provided by the embodiment of the invention has higher safety.
An embodiment of the present invention further provides a photovoltaic system, where the photovoltaic system includes: the photovoltaic power generation device 2 and the energy storage device 1 are arranged, wherein the photovoltaic power generation device 2 is connected with the motor 20 of the energy storage device 1, when the photovoltaic power generation device 2 is rich in power, the motor 20 is discharged, and therefore the motor 20 drives the whole energy storage device 1 to store energy. The specific structural form and the working principle of the energy storage device 1 have been described in detail in the foregoing embodiments, and details are not repeated here in the embodiments of the present invention.
According to the photovoltaic system provided by the embodiment of the invention, the energy storage device is arranged, so that redundant electric power can be stored in the energy storage device, the energy storage device is simple in structure, low in cost, convenient to operate and high in safety, the photovoltaic power generation device can store the redundant electric power conveniently, and the utilization rate of energy is improved.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The energy storage device and the photovoltaic system provided by the invention are described in detail, and the principle and the implementation mode of the invention are explained by applying specific examples, and the description of the examples is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (18)
1. An energy storage device, comprising: a hoist assembly, a motor and a generator; wherein the content of the first and second substances,
the hoisting assembly comprises a support platform, a mass block, a support tower and a wire spool;
the length direction of the mass block comprises a first end and a second end which are oppositely arranged, and the first end of the mass block is rotatably connected with the support platform;
the supporting tower is arranged on one side, close to the wire spool, of the supporting table, and a pulley is arranged on the supporting tower;
a traction rope is wound on the wire spool, one end of the traction rope is fixed on the wire spool, and the other end of the traction rope is connected with the second end of the mass block by winding the pulley;
the motor and the generator are respectively connected with the wire spool in a separable rotating mode.
2. The energy storage device of claim 1, wherein the mass comprises: a first position in a final lowering state and a second position in a final pulling state; wherein the content of the first and second substances,
the motor is rotationally coupled to the spool and the generator is decoupled from the spool upon rotation of the mass from the first position to the second position;
in the case where the mass is rotated from the second position to the first position, the motor is separated from the wire spool, and the generator is rotatably connected to the wire spool.
3. The energy storage device of claim 2, wherein the hoist assembly further comprises: a first gear, a second gear, and a third gear; wherein the content of the first and second substances,
the first gear is coaxial with the wire spool, the second gear is coaxial with the motor, and the third gear is coaxial with the generator;
the second gear and the third gear are respectively in a meshed state or a separated state with the first gear.
4. The energy storage device of claim 3, wherein said first gear is larger in size than said second and third gears.
5. The energy storage device of claim 1, wherein the hoist assembly further comprises: a first elastic member and a first protective post surrounding the first elastic member; wherein the content of the first and second substances,
the first elastic member is disposed at a position of the support tower near the second end.
6. The energy storage device of claim 2, wherein the hoist assembly further comprises: the second elastic piece and a second protection column surrounding the second elastic piece; wherein the content of the first and second substances,
the second elastic piece is arranged on one side, far away from the wire spool, of the supporting platform, and the second end of the mass block abuts against the second elastic piece under the condition that the mass block is located at the first position.
7. The energy storage device of claim 6, wherein said support platform and said second resilient member are disposed on a mounting platform, said mounting platform being disposed at an incline between said support platform and said second resilient member, said support platform being higher than said second resilient member.
8. The energy storage device as claimed in claim 1, wherein the support platform is provided with a hemispherical recess, and the first end of the mass is provided with a hemispherical protrusion matching with the recess, and the protrusion is embedded in the recess.
9. The energy storage device of claim 8, wherein a lubricant is applied between said protrusion and said recess.
10. The energy storage device of claim 8, wherein a waterproof member is further embedded between the protrusion and the groove, and the waterproof member is disposed at an outer edge of the groove.
11. The energy storage device of claim 1, wherein the hoist assembly further comprises: a support bar;
a rotating hole is formed in the position, close to the first end, of the mass block;
the support rod is arranged in the rotary hole in a penetrating mode, and two ends of the support rod are supported on the support platform.
12. The energy storage device of claim 11, wherein said hoist assembly further comprises: a third elastic member; wherein the content of the first and second substances,
and two ends of the supporting rod are respectively supported on the supporting platform through the third elastic piece.
13. The energy storage device of claim 11, wherein said hoist assembly further comprises: a bearing; wherein the content of the first and second substances,
the bearing is embedded in the rotating hole, and the supporting rod penetrates through the bearing hole of the bearing.
14. The energy storage device of claim 1, wherein the mass has a greater weight proximate the second end than proximate the first end.
15. The energy storage device of claim 1, wherein the mass comprises a housing filled with reinforced concrete.
16. The energy storage device of claim 1, wherein the mass comprises a plurality of sub-masses, the sub-masses being spaced apart;
the supporting tower is provided with a plurality of pulleys, and one sub-mass block corresponds to one wire spool and one pulley.
17. The energy storage device of claim 1, wherein said electric motors are paired, and a pair of said electric motors are coaxially disposed;
the generators are in a pair, and the generators are coaxially arranged;
the plurality of hoist assemblies are disposed between a pair of the motors and a pair of the generators.
18. A photovoltaic system, comprising: a photovoltaic power generation device and an energy storage device as claimed in any one of claims 1 to 17; wherein the content of the first and second substances,
the photovoltaic power generation device is connected with the motor of the energy storage device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911319988.7A CN111120227A (en) | 2019-12-19 | 2019-12-19 | Energy storage device and photovoltaic system |
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| CN201911319988.7A CN111120227A (en) | 2019-12-19 | 2019-12-19 | Energy storage device and photovoltaic system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024036561A1 (en) * | 2022-08-18 | 2024-02-22 | 中国电力科学研究院有限公司 | Energy storage device and power transmission line monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024036561A1 (en) * | 2022-08-18 | 2024-02-22 | 中国电力科学研究院有限公司 | Energy storage device and power transmission line monitoring system |
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