Energy storage device for collecting wind energy and light energy

Abstract

The present invention discloses an energy storage device for collecting wind energy and light energy, which belongs to the field of new energy technology and solves the problem that the real wind power abandonment and solar power abandonment (residual energy) still cause a certain degree of loss, resulting in poor utilization rate. It includes a low-temperature molten salt tank, which is used to store the medium before heating; a high-temperature molten salt tank, which is used to store the medium after heating; a multi-stage electric heating chamber, which is connected between the low-temperature molten salt tank and the high-temperature molten salt tank, and the multi-stage electric heating chamber includes a plurality of electric heating chambers, and the volume of the plurality of electric heating chambers decreases step by step from the low-temperature molten salt tank to the high-temperature molten salt tank. The present invention utilizes the excess abandoned electricity of wind energy and photovoltaic power generation to heat a plurality of small-volume electric heating chambers, and gradually increases the temperature to ensure rapid heating, and utilizes the excess medium of the previous stage as the insulation medium of the next stage to reduce heat loss. The insulation medium that loses heat is sent to the solar tower for photothermal heating, and then added to the electric heating chambers of each level to accelerate the medium to reach the standard temperature and reduce the waste of abandoned electricity.

Description

Technical Field

[0001] The present invention relates to the field of new energy technology, and in particular to an energy storage device for collecting wind energy and light energy. Background Art

[0002] The wind-solar hybrid system is an energy system that combines two renewable energy sources, wind energy and solar energy. It uses wind turbines and solar photovoltaic panels to work together to improve energy efficiency and stability. When the wind is strong, wind turbines can provide electricity; when the sun is strong, solar photovoltaic panels come into play. The advantage of this system is that it can complement the instability of the two energy sources. For example, in windless or rainy weather, solar energy can be used as a supplement to energy supply; conversely, at night or in cloudy weather, wind power can provide the required electricity. The wind-solar hybrid system is suitable for remote areas, islands or any place that requires independent energy supply. It not only reduces dependence on fossil fuels, but also helps reduce greenhouse gas emissions. It is an environmentally friendly and efficient energy solution.

[0003] Wind power curtailment and solar power curtailment in the wind-solar hybrid system refer to the phenomenon that during the wind or solar power generation process, some renewable energy cannot be effectively utilized and is forced to be abandoned due to insufficient energy storage facilities. This phenomenon usually occurs when the grid load is low or the renewable energy generation exceeds the demand. Wind power curtailment mainly occurs during peak wind power generation periods, such as at night or during periods with high wind speeds, while solar power curtailment mostly occurs during periods of strong sunshine but low grid demand. Curtailment not only wastes energy, but may also damage power generation equipment and reduce its service life.

[0004] In the prior art, for example, a wind power, photovoltaic, solar thermal and medium heat storage combined energy supply system with application number CN201410856516.6 has the following technical points: it includes a low-temperature medium tank for storing the medium before heating; a high-temperature medium tank for storing the medium after heating; wind power and photovoltaic power generation equipment for power generation; a medium electric heater for heating the medium before heating output from the low-temperature medium tank into the medium after heating using the electricity generated by the wind power and photovoltaic power generation equipment; a heat exchanger for heating water into water vapor using the heated medium output from the high-temperature medium tank; a steam generator set for generating electricity by driving a steam turbine with water vapor; the medium before heating is output from the low-temperature medium tank, becomes the heated medium after passing through the medium electric heater and is stored in the high-temperature medium tank, and the heated medium is output from the high-temperature medium tank to the heat exchanger, and the heat exchanger generates water vapor to enable the steam generator set to generate electricity; it also includes, A second heater for heating the pre-heating medium output from the low-temperature medium tank or a third heater for heating the water or water vapor in the heat exchanger; the second heater includes a first tower solar thermal collector or a trough solar thermal collector; the third heater includes a second tower solar thermal collector or a second trough solar thermal collector, wherein the heat exchanger includes a superheated steam generator for generating superheated water steam, a steam generator for generating saturated water steam and a preheater for heating water; the second tower solar thermal collector heats the water before or after being heated by the preheater to generate second water vapor, and the second water vapor is secondary heated by the superheated steam generator to generate superheated water vapor to drive the steam turbine to generate electricity, and the low-temperature medium tank and the medium electric heater are also directly connected by a pipeline; the second heater and the high-temperature medium tank are also directly connected by a pipeline.

[0005] In the above-mentioned wind power, photovoltaic, solar thermal and medium heat storage combined energy supply system, the wind power and photovoltaic power generation equipment can use all the electricity generated by wind power and photovoltaic to heat the medium for energy storage and then generate electricity, or use the remaining energy to heat the medium (the medium before heating) while generating electricity.

[0006] It should be noted that in the above-mentioned wind power, photovoltaic, solar thermal and medium heat storage combined energy supply system, the wind power and photovoltaic power generation equipment can use all the wind power and photovoltaic power generation to heat the medium energy storage before generating electricity, or use the remaining energy to heat the medium (the medium before heating) while generating electricity. When all the wind power and photovoltaic power generation are used to heat the medium energy storage, the heated medium energy storage can be heated to a high temperature of nearly 600°C and then stored. However, when generating electricity while using the remaining energy to heat the medium, if it is necessary to heat all the media in the low-temperature medium tank and introduce them into the high-temperature medium tank, all the low-temperature media are heated at one time. The volume of the warm medium is huge and it takes a very long time to complete. If it is necessary to speed up the diffusion of the heated medium to other low-temperature media during the process, the low-temperature medium must remain in a flowing state during the heating process. In the actual heating process, due to the energy loss of the low-temperature medium flow, the energy that can be provided when generating electricity while using the remaining energy to heat the medium is relatively small. As a result, whether it is dynamic heating or static heating, the heating efficiency of the low-temperature medium is not significantly improved. In this process, real wind power abandonment and solar power abandonment (remaining energy) will still cause a certain degree of loss, resulting in poor utilization.

[0007] Therefore, an energy storage device for collecting wind energy and light energy is proposed to solve or alleviate the above problems. Summary of the invention

[0008] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an energy storage device for collecting wind energy and light energy.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] An energy storage device for collecting wind energy and light energy, comprising

[0011] Low temperature molten salt tank, which is used to store the medium before heating;

[0012] High temperature molten salt tank, which is used to store heated medium;

[0013] A multi-stage electric heating chamber connected between the low-temperature molten salt tank and the high-temperature molten salt tank, wherein the multi-stage electric heating chamber comprises a plurality of electric heating chambers, wherein the inner volumes of the plurality of electric heating chambers decrease step by step from the low-temperature molten salt tank to the high-temperature molten salt tank, and the standard temperatures of the media in the plurality of electric heating chambers increase step by step from the low-temperature molten salt tank to the high-temperature molten salt tank, and the sum of the volumes of the plurality of electric heating chambers is less than the volumes of the low-temperature molten salt tank and the high-temperature molten salt tank;

[0014] A multi-stage electric heater, which is used to heat the medium in the multi-stage electric heating cavity, the multi-stage electric heater comprises a plurality of electric heaters, each of which is respectively arranged in each electric heating cavity;

[0015] A multi-stage insulation sleeve, which is sleeved on the outside of the multi-stage electric heating chamber, the multi-stage insulation sleeve includes a plurality of insulation chambers and a plurality of insulation covers, the insulation covers are sleeved on the outside of the insulation chambers, each insulation chamber is sleeved on the outside of each electric heating chamber, and the first insulation chamber is connected to the low-temperature molten salt tank, and the remaining insulation chambers are each connected to the electric heating chamber of the previous stage;

[0016] There are several wind power generation equipment and photovoltaic power generation equipment, which are used to power the multi-stage electric heater with abandoned electricity.

[0017] Preferably, it further comprises a voltage stabilizer and an inverter, and the output ends of the wind power generation equipment and the photovoltaic power generation equipment are sequentially coupled to the voltage stabilizer and the inverter to supply power to the electric heater.

[0018] Preferably, the sum of the volumes of the heat preservation chambers at the same level except the first heat preservation chamber and the electric heating chambers at the same level is smaller than the volume of the electric heating chambers at the previous level.

[0019] Preferably, it also includes

[0020] A heat collecting tower, the heat collecting tower comprising a tower body and a tower heat collector, the input end of the tower heat collector being connected to a plurality of heat preservation chambers, the output end of the tower heat collector being connected to a plurality of electric heating chambers, and the volume of the tower heat collector being equal to the sum of the volumes of the plurality of heat preservation chambers;

[0021] The photothermal mechanism is arranged on the outside of the tower collector.

[0022] Preferably, the tower collector is arranged on the top surface of the tower body, and the top surface of the tower body is fixedly connected to a plurality of support columns located on the outside of the tower collector, and the upper ends of the plurality of support columns are commonly fixedly connected to a support top cover located above the tower collector, and the photothermal structure includes a plurality of petal components evenly spaced on the top surface of the tower body.

[0023] Preferably, the petal assembly includes a connecting rod rotatably connected to the top edge of the tower body through a hinge seat, and a curved mirror, one end of the curved mirror is rotatably connected to the end of the connecting rod away from the hinge seat, the angle between the central axis of the connecting rod and the central axis of the tower body is adjustable, the angle between the central axis of the connecting rod and the central axis of the curved mirror is adjustable, and the curved mirror adjusts its position relative to the tower collector according to the position of the sun.

[0024] Preferably, the maximum distance between the connecting rods in adjacent petal assemblies is greater than the length of the arc-shaped mirror surface.

[0025] Preferably, the petal assembly also includes a controller, a first adjusting member and a second adjusting member, the first adjusting member and the second adjusting member are arranged in the supporting top cover, the retractable end of the first adjusting member is fixedly connected to the end of the connecting rod away from the hinged seat through a first connecting rope, and the retractable end of the second adjusting member is fixedly connected to the end of the arc mirror away from the connecting rod through a second connecting rope, and the output end of the controller is coupled to the input ends of the first adjusting member and the second adjusting member.

[0026] Preferably, the first adjusting member and the second adjusting member are both servo motors.

[0027] Preferably, the method for adjusting the position of the curved mirror relative to the tower collector according to the position of the sun comprises the following steps:

[0028] Obtain the environmental characteristics and longitude and latitude coordinates of the location of the collector tower, obtain the dimensions and specifications of the collector tower, the dimensions and specifications of the tower collector, the height of the tower collector from the ground, the length of the connecting rod, the dimensions and specifications of the curved mirror, and the height of the curved mirror from the ground;

[0029] The environmental characteristics and longitude and latitude coordinates of the location of the solar tower are imported into the SPA astronomical algorithm to obtain the sun's position;

[0030] The spatial coordinate system is established with the center midline of the collector tower as the Y axis. The spatial coordinates of the two ends of the arc mirror in the length direction and the spatial coordinates of the two ends of the connecting rod in the length direction are obtained through the calculation of the sun's position, the size of the arc mirror, the focus of the arc mirror, the height of the arc mirror from the ground, and the height of the tower collector from the ground.

[0031] The spatial coordinates of both ends of the arc mirror in the length direction and the spatial coordinates of both ends of the connecting rod in the length direction are imported into the controller, and the controller controls the first adjustment member and the second adjustment member to adjust the positions of the connecting rod and the arc mirror.

[0032] The present invention has the following beneficial effects:

[0033] The present invention can heat multiple electric heating chambers through the surplus abandoned electricity after power generation by wind power generation equipment and photovoltaic power generation equipment. Since the volume of multiple electric heating chambers is small and the amount of medium heated each time is limited, after heating the medium step by step, it can be ensured that the temperature in each electric heating chamber rises rapidly. At the same time, the excess heating medium in the previous electric heating chamber can be used as the insulation medium in the next insulation chamber, reducing the temperature difference when the electric heating chambers of each stage are in contact with the external environment, reducing the heat loss in the process, and at the same time, the medium after the heat loss in the insulation chambers of each stage can be sent to the heat collection tower for photothermal heating, and then replenished into the electric heating chambers of each stage, accelerating the medium temperature in the electric heating chambers of each stage to reach the standard and reducing the waste of abandoned electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural block diagram of the present invention;

[0035] Figure 2 It is a schematic diagram of the structure of the heat collecting tower in the present invention;

[0036] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0037] Figure 4 It is a block diagram of the internal structure of the heat collecting tower in the present invention;

[0038] Figure 5 It is a structural block diagram of the interior of the heat collecting tower and the wind power generation equipment and photovoltaic power generation equipment in the present invention.

[0039] 1. Collecting tower; 101. Tower body; 1021. Support column; 1022. Support top cover; 103. Tower collector; 1041. Articulated seat; 1042. Connecting rod; 1043. Curved mirror; 1044. First connecting rope; 1045. Second connecting rope; 2. First-level electric heating; 201. First-level insulation chamber; 202. First-level electric heater; 3. Second-level electric heating chamber; 301. Second-level insulation chamber; 302. Second-level electric heater; 4. Third-level electric heating chamber; 401. Third-level insulation chamber; 402. Third-level electric heater; 5. Fourth-level electric heating chamber; 501. Fourth-level insulation chamber; 502. Fourth-level electric heater; 6. High-temperature molten salt tank; 7. Low-temperature molten salt tank. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0041] An energy storage device that collects wind energy and light energy, such as Figure 1 , 4 As shown in 5, it includes a low-temperature molten salt tank 7, which is used to store the medium before heating;

[0042] A high temperature molten salt tank 6, which is used to store the heated medium;

[0043] A multi-stage electric heating chamber is connected between the low-temperature molten salt tank 7 and the high-temperature molten salt tank 6. The multi-stage electric heating chamber includes a plurality of electric heating chambers. The volume of the plurality of electric heating chambers decreases step by step from the low-temperature molten salt tank 7 to the high-temperature molten salt tank 6. The standard temperature of the medium in the plurality of electric heating chambers increases step by step from the low-temperature molten salt tank 7 to the high-temperature molten salt tank 6. The sum of the volumes of the plurality of electric heating chambers is less than the volumes of the low-temperature molten salt tank 7 and the high-temperature molten salt tank 6.

[0044] For a specific example, the number of the electric heating chambers is four, and the four electric heating chambers are respectively a first-level electric heating chamber, a second-level electric heating chamber 3 , a third-level electric heating chamber 4 , and a fourth-level electric heating chamber 5 .

[0045] A multi-stage electric heater is used to heat the medium in the multi-stage electric heating cavity. The multi-stage electric heater includes a plurality of electric heaters, each of which is respectively arranged in each electric heating cavity;

[0046] For a specific example, there are four electric heaters, which are a first-level electric heater 202, a second-level electric heater 302, a third-level electric heater 402, and a fourth-level electric heater 502. The first-level electric heater 202, the second-level electric heater 302, the third-level electric heater 402, and the fourth-level electric heater 502 are respectively arranged in the first-level electric heating chamber, the second-level electric heating chamber 3, the third-level electric heating chamber 4, and the fourth-level electric heating chamber 5.

[0047] A multi-stage insulation sleeve, which is sleeved on the outside of the multi-stage electric heating chamber, the multi-stage insulation sleeve includes a plurality of insulation chambers and a plurality of insulation covers, the insulation covers are sleeved on the outside of the insulation chambers, each insulation chamber is sleeved on the outside of each electric heating chamber, and the first insulation chamber is connected to the low-temperature molten salt tank 7, and the remaining insulation chambers are each connected to the electric heating chamber of the previous stage;

[0048] For a specific example, there are four insulation chambers, which are a first-level insulation chamber 201, a second-level insulation chamber 301, a third-level insulation chamber 401, and a fourth-level insulation chamber 501. The first-level insulation chamber 201, the second-level insulation chamber 301, the third-level insulation chamber 401, and the fourth-level insulation chamber 501 are respectively arranged on the outside of the first-level electric heating chamber, the second-level electric heating chamber 3, the third-level electric heating chamber 4, and the fourth-level electric heating chamber 5.

[0049] There are several wind power generation equipment and photovoltaic power generation equipment, which are used to power the multi-stage electric heater with abandoned electricity.

[0050] The low-temperature molten salt tank 7 outputs the pre-heating medium, and the temperature of the pre-heating medium is still higher than the temperature of its melting point, that is, greater than 220 degrees Celsius. When passing through the multi-stage electric heating chamber, since the standard temperature of each electric heating chamber increases step by step, in the same time, if the temperature is higher, the temperature rises more slowly. Therefore, in the electric heating chamber with a higher standard temperature, the amount of heating medium that can be heated to meet the standard in the same time is also less. Therefore, the volume of the multi-stage electric heating chamber needs to be reduced step by step. In fact, the sum of the volumes of several electric heating chambers is smaller than the volumes of the low-temperature molten salt tank 7 and the high-temperature molten salt tank 6, ensuring that the pre-heating medium in the low-temperature molten salt tank 7 can be divided into several batches and slowly heated to the high-temperature molten salt tank 6, so that the high-temperature molten salt tank 6 The heated medium will not increase or decrease suddenly. Even if the heated medium stored in the high-temperature molten salt tank 6 is fully filled at one time in the morning, even if the thermal insulation performance of the high-temperature molten salt tank 6 is good, in this process, as time goes by, the heat of the heated medium therein will slowly be lost. In the present invention, the heated medium is gradually added, and the heated medium in the high-temperature molten salt tank 6 can maintain a high temperature for a longer time. In addition, it should be noted that if the abandoned power is used to heat the medium, since the abandoned power is insufficient compared to the main output power and is not as stable as the main output power, it is actually impossible to heat a large amount of medium at one time.

[0051] At the same time, since the volumes of the electric heating chambers at each level are set to decrease step by step, there must be a difference between the volumes of the electric heating chambers at each level. The medium of this difference will always remain in the electric heating chambers of the corresponding levels after being heated by the electric heaters of each level. After the medium in the electric heating chamber of the previous level enters, it can be mixed with the newly entered medium, whether it is to heat up the newly entered medium or to make up for the heat loss of the newly entered medium during the transfer process.

[0052] It should be noted that when the electric heaters at each level heat the medium in the electric heating chambers at each level, the insulation chambers at each level will have the effect of heat insulation and heat preservation for the electric heating chambers at each level. There is no need to worry about what material to use for the insulation cover. High-temperature resistant ceramics, aluminum silicate materials and other materials with good insulation effects can be used. Since the temperature of the medium in the insulation chambers at each level is lower than the temperature of the medium in the electric heating chamber at the same level, in fact, the temperature of the medium in the insulation chambers at each level is the same as or similar to the temperature of the medium in the electric heating chamber at the previous level. The medium in the first insulation chamber comes from the low-temperature molten salt tank 7. Through this setting, the temperature difference between the electric heating chambers at each level and the insulation chambers at each level is reduced, and the temperature difference between the insulation chamber and the outside world can also be reduced. When the temperature difference is reduced, the rate of heat loss will also decrease, so that the heated medium in the electric heating chambers at each level can maintain a relatively stable temperature and is not easily cooled.

[0053] After the wind power generation equipment and the photovoltaic power generation equipment output the main electric energy to the power grid, there will still be abandoned power, that is, the overflow power after the electric energy output of the wind power generation equipment and the photovoltaic power generation equipment exceeds the main electric energy output. Therefore, the amount of abandoned power is sometimes high, sometimes low, sometimes stable, and sometimes fluctuating. This part of abandoned power is less than the main electric energy output, and it cannot achieve a huge amount of power like the main electric energy output. Instead, it needs to accumulate for a period of time to form a more objective amount of energy. In conjunction with the multi-stage synchronous heating method in this scheme, the amount of medium heated in each batch is less than the amount of medium in the low-temperature molten salt tank 7 and the high-temperature molten salt tank 6. Therefore, the amount of medium heated by the multi-stage electric heater each time will not exceed the upper limit of the abandoned power, avoiding the problem of insufficient power caused by the need to heat a large amount of medium at one time due to abandoned power.

[0054] Preferably, if Figure 5 As shown, it also includes a voltage stabilizer and an inverter. The output ends of the wind power generation equipment and the photovoltaic power generation equipment are sequentially coupled to the voltage stabilizer and the inverter to supply power to the electric heater.

[0055] The inverter is set up to facilitate the conversion of direct current and alternating current, so that when electricity is finally generated by wind power generation equipment and photovoltaic power generation equipment, the final output is alternating current that can be connected to the power grid. The voltage stabilizer is to ensure that the voltage of the unevenly generated electricity of wind power generation equipment and photovoltaic power generation equipment can maintain a relatively stable output, avoiding excessive fluctuations in the alternating current connected to the power grid.

[0056] It should be noted that the wind power generation equipment and photovoltaic power generation equipment in this scheme are both existing technologies, and do not involve improvements to the structures of how the two generate electricity. Both structures only need to be able to generate electricity normally. How to generate electricity is not the content of all considerations in this scheme, so it will not be elaborated here.

[0057] Preferably, the sum of the volumes of the insulation chambers 201 of the same level except the first insulation chamber and the electric heating chambers of the same level is smaller than the volume of the electric heating chamber of the previous level.

[0058] The reason for this arrangement is to ensure that after the medium is heated by the same-level electric heater 202 in the same-level electric heating chamber, part of it flows into the next-level electric heating chamber, and part of it flows into the next-level insulation chamber for thermal insulation. There will also be a reserved part of the difference that can be retained in the original electric heating chamber.

[0059] Preferably, if Figure 2 As shown, it also includes

[0060] A heat collecting tower 1, comprising a tower body 101 and a tower heat collector 103, wherein an input end of the tower heat collector 103 is connected to a plurality of heat preservation chambers, an output end of the tower heat collector 103 is connected to a plurality of electric heating chambers, and a volume of the tower heat collector 103 is equal to the sum of volumes of the plurality of heat preservation chambers;

[0061] The photothermal mechanism is arranged outside the tower collector 103 .

[0062] The tower body 101 is designed to allow the tower collector 103 to maintain a certain height and provide a certain space for the flow of the medium. The tower collector 103 can collect the insulation medium in the insulation chambers of each level after the temperature drops, and the insulation medium recovered from the insulation chamber to the tower collector 103 is heated by the photothermal mechanism. The medium therein is heated by photothermal means, and finally the heated medium is introduced into the electric heating chambers of each level through the tower collector 103 to heat the heating medium therein, thereby increasing its temperature. In the case of a lack of abandoned power, the medium temperature can be supplemented. In this solution, the heating medium in the tower collector 103 can be introduced into the first-level electric heating chamber, the second-level electric heating chamber 3, and the third-level electric heating chamber 4.

[0063] Preferably, if Figure 3 As shown, the tower collector 103 is arranged on the top surface of the tower body 101, and a plurality of support columns 1021 located on the outside of the tower collector 103 are fixedly connected to the top surface of the tower body 101, and the upper ends of the plurality of support columns 1021 are commonly fixedly connected to a support top cover 1022 located above the tower collector 103, and the solar thermal mechanism includes a plurality of petal components evenly spaced on the top surface of the tower body 101.

[0064] The support column 1021 is used to support the support top cover 1022, so as to ensure that the tower collector 103 can be arranged between the tower body 101 and the support top cover 1022, so as to prevent the tower collector 103 from being directly exposed to the outside world. When it rains or in other weather conditions, the support top cover 1022 protects the tower collector 103 to prevent objects, rainwater, etc. from falling directly on the tower collector 103. Several evenly spaced petal components constitute an entire photothermal mechanism, which absorbs the heat of the sunlight by reflecting and collecting sunlight, thereby completing the heating of the medium in the tower collector 103.

[0065] Preferably, if Figure 3As shown, the petal assembly includes a connecting rod 1042 rotatably connected to the top edge of the tower body 101 through a hinge seat 1041, and a curved mirror 1043, one end of the curved mirror 1043 is rotatably connected to the end of the connecting rod 1042 away from the hinge seat 1041, the angle between the central axis of the connecting rod 1042 and the central axis of the tower body 101 is adjustable, the angle between the central axis of the connecting rod 1042 and the central axis of the curved mirror 1043 is adjustable, and the curved mirror 1043 adjusts its position relative to the tower collector 103 according to the position of the sun.

[0066] When the petal assembly is unfolded, the position of the curved mirror 1043 is adjusted according to the position of the sunlight, so that the sunlight incident on the curved mirror 1043 can be reflected by the curved mirror 1043 onto the tower collector 103. During the entire use of the device, the curved mirror 1043 can always reflect sunlight to the tower collector 103 for heat collection.

[0067] Preferably, the maximum distance between the connecting rods 1042 in adjacent petal assemblies is greater than the length of the arc-shaped mirror surface 1043 .

[0068] The maximum spacing between the connecting rods 1042 in adjacent petal components is set to be greater than the length of the curved mirror 1043. This is mainly to ensure that during the expansion of the connecting rods 1042 and the curved mirror 1043, adjacent petal components will not collide due to distance issues. It also ensures that the petal components can make use of the limited space as much as possible to increase the area of ​​reflected sunlight.

[0069] Preferably, the petal assembly also includes a controller, a first adjusting member and a second adjusting member, the first adjusting member and the second adjusting member are arranged in the supporting top cover 1022, the retractable end of the first adjusting member is fixedly connected to the end of the connecting rod 1042 away from the hinge seat 1041 through the first connecting rope 1044, the retractable end of the second adjusting member is fixedly connected to the end of the arc mirror 1043 away from the connecting rod 1042 through the second connecting rope 1045, and the output end of the controller is coupled to the input ends of the first adjusting member and the second adjusting member.

[0070] The support top cover 1022 is a hollow structure, and the first adjustment member and the second adjustment member are arranged in the support top cover 1022. By winding up the first connecting rope 1044 and the second connecting rope 1045, or lengthening the first connecting rope 1044 and the second connecting rope 1045, the angle between the central axis of the connecting rod 1042 and the central axis of the tower body 101, and the angle between the central axis of the connecting rod 1042 and the central axis of the arc mirror 1043 are adjusted.

[0071] Preferably, the first adjusting member and the second adjusting member are both servo motors, and the controller may be a CPU of s7-1200.

[0072] Preferably, the method for adjusting the position of the arc mirror 1043 relative to the tower collector 103 according to the position of the sun comprises the following steps:

[0073] Obtain the environmental characteristics and longitude and latitude coordinates of the location of the heat collecting tower 1, obtain the size specifications of the heat collecting tower 1, the size specifications of the tower collector 103, the height of the tower collector 103 from the ground, the length of the connecting rod 1042, the size specifications of the arc mirror 1043, and the height of the arc mirror 1043 from the ground;

[0074] The environmental characteristics and longitude and latitude coordinates of the location of the heat collecting tower 1 are imported into the SPA astronomical algorithm to obtain the sun's position;

[0075] The spatial coordinate system is established with the center midline of the heat collecting tower 1 as the Y axis, and the spatial coordinates of the two ends of the length direction of the arc mirror 1043 and the spatial coordinates of the two ends of the length direction of the connecting rod 1042 are obtained by calculating the sun's position, the size of the arc mirror 1043, the focus of the arc mirror 1043, the height of the arc mirror 1043 from the ground, and the height of the tower collector 103 from the ground;

[0076] The spatial coordinates of both ends of the arc mirror 1043 in the length direction and the spatial coordinates of both ends of the connecting rod 1042 in the length direction are imported into the controller, and the controller controls the first adjustment member and the second adjustment member to adjust the positions of the connecting rod 1042 and the arc mirror 1043.

[0077] The above method is used to calculate the sun's position (including altitude and azimuth) on that day, and when the various parameters of the curved mirror 1043 and the various parameters of the tower collector 103 are known, the curved mirror 1043 is calculated to be in what spatial coordinates when the sunlight is incident. The sunlight focused by the curved mirror 1043 can directly irradiate the tower collector 103. Since the various parameters of the collector tower 1 are known, and the spatial coordinate system is established with the central axis of the collector tower 1 as the Y axis, it is possible to obtain the curved mirror 1043. When the spatial coordinates of the two ends of the length direction of the surface 1043 are obtained, it is used to calculate the angle between the central axis of the connecting rod 1042 and the central axis of the collector tower 1, and the angle between the central axis of the connecting rod 1042 and the central axis of the curved mirror 1043. When the angle is maintained, the sunlight focused by the curved mirror 1043 can be directly irradiated on the tower collector 103. In this way, it is convenient for the controller to control the first adjustment member and the second adjustment member, so that the control of the photothermal mechanism can be more logical and the operation is more convenient and quick.

[0078] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An energy storage device for collecting wind energy and light energy, characterized in that: include A low-temperature molten salt tank (7), which is used to store the medium before heating; A high-temperature molten salt tank (6), which is used to store the heated medium; A multi-stage electric heating chamber connected between the low-temperature molten salt tank (7) and the high-temperature molten salt tank (6), the multi-stage electric heating chamber comprising a plurality of electric heating chambers, the internal volumes of the plurality of electric heating chambers decreasing step by step from the low-temperature molten salt tank (7) to the high-temperature molten salt tank (6), the standard temperatures of the media in the plurality of electric heating chambers increasing step by step from the low-temperature molten salt tank (7) to the high-temperature molten salt tank (6), and the sum of the volumes of the plurality of electric heating chambers being less than the volumes of the low-temperature molten salt tank (7) and the high-temperature molten salt tank (6); A multi-stage electric heater, which is used to heat the medium in the multi-stage electric heating cavity, the multi-stage electric heater comprises a plurality of electric heaters, each of which is respectively arranged in each electric heating cavity; A multi-stage insulation sleeve, which is sleeved on the outside of the multi-stage electric heating chamber, the multi-stage insulation sleeve includes a plurality of insulation chambers and a plurality of insulation covers, the insulation covers are sleeved on the outside of the insulation chambers, each insulation chamber is sleeved on the outside of each electric heating chamber, and the first insulation chamber is connected to the low-temperature molten salt tank (7), and the remaining insulation chambers are each connected to the electric heating chamber of the previous stage, and the sum of the volumes of the insulation chambers of the same stage except the first insulation chamber and the electric heating chamber of the same stage is less than the volume of the electric heating chamber of the previous stage; A heat collecting tower (1), the heat collecting tower (1) comprising a tower body (101) and a tower heat collector (103), the input end of the tower heat collector (103) being in communication with a plurality of heat preservation chambers, the output end of the tower heat collector (103) being in communication with a plurality of electric heating chambers, and the volume of the tower heat collector (103) being equal to the sum of the volumes of the plurality of heat preservation chambers; A photothermal mechanism, wherein the photothermal mechanism is arranged outside the tower collector (103); There are several wind power generation equipment and photovoltaic power generation equipment, which are used to power the multi-stage electric heater with abandoned electricity.

2. The energy storage device for collecting wind energy and light energy according to claim 1, characterized in that: It also includes a voltage stabilizer and an inverter. The output ends of the wind power generation equipment and the photovoltaic power generation equipment are sequentially coupled to the voltage stabilizer and the inverter to supply power to the electric heater.

3. The energy storage device for collecting wind energy and light energy according to claim 1, characterized in that: The tower collector (103) is arranged on the top surface of the tower body (101); the top surface of the tower body (101) is fixedly connected to a plurality of support columns (1021) located outside the tower collector (103); the upper ends of the plurality of support columns (1021) are commonly fixedly connected to a support top cover (1022) located above the tower collector (103); and the photothermal mechanism comprises a plurality of petal components evenly spaced on the top surface of the tower body (101).

4. The energy storage device for collecting wind energy and light energy according to claim 3, characterized in that: The petal assembly comprises a connecting rod (1042) rotatably connected to the top edge of the tower body (101) via a hinge seat (1041), and a curved mirror (1043); one end of the curved mirror (1043) is rotatably connected to an end of the connecting rod (1042) away from the hinge seat (1041); the angle between the central axis of the connecting rod (1042) and the central axis of the tower body (101) is adjustable; the angle between the central axis of the connecting rod (1042) and the central axis of the curved mirror (1043) is adjustable; and the position of the curved mirror (1043) relative to the tower collector (103) is adjusted according to the position of the sun.

5. The energy storage device for collecting wind energy and light energy according to claim 4, characterized in that: The maximum distance between the connecting rods (1042) in adjacent petal assemblies is greater than the length of the arc-shaped mirror surface (1043).

6. The energy storage device for collecting wind energy and light energy according to claim 4 or 5, characterized in that: The petal assembly also includes a controller, a first adjusting member and a second adjusting member, wherein the first adjusting member and the second adjusting member are arranged in the support top cover (1022), the retractable end of the first adjusting member is fixedly connected to an end of the connecting rod (1042) away from the hinge seat (1041) via a first connecting rope (1044), and the retractable end of the second adjusting member is fixedly connected to an end of the arc mirror (1043) away from the connecting rod (1042) via a second connecting rope (1045), and the output end of the controller is coupled to the input ends of the first adjusting member and the second adjusting member.

7. The energy storage device for collecting wind energy and light energy according to claim 6, characterized in that: The first adjusting member and the second adjusting member are both servo motors.

8. The energy storage device for collecting wind energy and light energy according to claim 4, characterized in that: The method for adjusting the position of the arc-shaped mirror (1043) relative to the tower-type heat collector (103) according to the position of the sun comprises the following steps: Obtaining environmental characteristics and longitude and latitude coordinates of the location of the heat collecting tower (1), obtaining the dimensions of the heat collecting tower (1), the dimensions of the tower heat collector (103), the height of the tower heat collector (103) from the ground, the length of the connecting rod (1042), the dimensions of the curved mirror (1043), and the height of the curved mirror (1043) from the ground; The environmental characteristics and longitude and latitude coordinates of the location of the heat collecting tower (1) are imported into the SPA astronomical algorithm to obtain the sun's position; A spatial coordinate system is established with the center midline of the heat collecting tower (1) as the Y axis, and the spatial coordinates of the two ends of the length direction of the curved mirror (1043) and the spatial coordinates of the two ends of the length direction of the connecting rod (1042) are obtained by calculating the position of the sun, the size of the curved mirror (1043), the focus of the curved mirror (1043), the height of the curved mirror (1043) from the ground, and the height of the tower collector (103) from the ground; The spatial coordinates of the two ends of the arc mirror (1043) in the length direction and the spatial coordinates of the two ends of the connecting rod (1042) in the length direction are imported into the controller, and the controller controls the first adjustment member and the second adjustment member to adjust the positions of the connecting rod (1042) and the arc mirror (1043).

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