阅读说明：本技术 一种适用于高空气球的循环能源供电系统 (circulating energy power supply system suitable for high-altitude balloon ) 是由 徐国宁 刘乾石 李兆杰 杜晓伟 于 2019-07-30 设计创作，主要内容包括：本发明实施例提供一种适用于高空气球的循环能源供电系统,包括：太阳电池阵、储能电池组、能源管理器和配电器,储能电池组包括主储能电池组和应急储能电池组。太阳电池阵用于将太阳能转换为电能,储能电池组用于在无太阳光照期间给负载供电；能源管理器用于追踪太阳电池阵最大功率给储能电池组充电和负载供电；配电器用于将太阳电池阵和储能电池组的母线电压转换为不同的电压,并在主储能电池组出现故障时自动切换到应急储能电池组。本发明利用太阳电池和储能电池组成的循环能源供电系统实现高空气球能源系统的能量平衡,有效延长高空气球的驻空时间,提供稳定可靠的能源供给,该循环能源供电系统也适用于其它低动态高空长航时飞行平台。(The embodiment of the invention provides a circulating energy power supply system suitable for a high-altitude balloon, which comprises: the solar cell array comprises a solar cell array, an energy storage battery pack, an energy manager and a distributor, wherein the energy storage battery pack comprises a main energy storage battery pack and an emergency energy storage battery pack. The solar cell array is used for converting solar energy into electric energy, and the energy storage battery pack is used for supplying power to a load during the period without solar illumination; the energy manager is used for tracking the maximum power of the solar cell array to charge the energy storage battery pack and supply power to a load; the distributor is used for converting bus voltage of the solar cell array and the energy storage battery pack into different voltages and automatically switching to the emergency energy storage battery pack when the main energy storage battery pack breaks down. The invention realizes the energy balance of the high-altitude balloon energy system by utilizing the circulating energy power supply system consisting of the solar battery and the energy storage battery, effectively prolongs the air-staying time of the high-altitude balloon, provides stable and reliable energy supply, and is also suitable for other low-dynamic high-altitude long-endurance flying platforms.)

1. A circulating energy power supply system suitable for a high-altitude balloon, comprising: the solar energy storage battery pack comprises a main energy storage battery pack and an emergency energy storage battery pack, wherein the solar energy storage battery pack is connected with a first end of the energy manager, the main energy storage battery pack is connected with a second end of the energy manager, a third end of the energy manager is connected with a first end of the power distributor, a second end of the power distributor is connected with a load, and a third end of the power distributor is connected with the emergency energy storage battery pack;

The solar cell array consists of five groups of solar cells in all, is distributed on the periphery and the upper surface of the high-altitude balloon pod and is used for converting solar energy into electric energy;

The main energy storage battery pack is used for supplying power to the load in the no-sun-illumination time period, and the emergency energy storage battery pack is used for supplying power to an important load when the main energy storage battery pack breaks down;

The energy manager charges the energy storage battery pack by using the solar battery array, supplies power to the load and tracks the maximum power of each group of solar batteries respectively;

The distributor is used for converting bus voltages output by the solar cell array and the energy storage battery pack into voltages required by different loads; and on the other hand, the emergency energy storage battery pack is automatically switched to when the main energy storage battery pack has a fault.

2. the system as claimed in claim 1, wherein any four groups of solar cells in the solar cell array are arranged around the high-altitude balloon pod, a fifth group is arranged on the upper surface of the high-altitude balloon pod, and the four groups of solar cells are arranged in a single-axis tracking type four-side structure;

Wherein, single-axis tracking formula four sides structure specifically includes: base, solar cell panel and a plurality of bracing piece, the base is the tetragonal body, each limit of base upper surface is connected with each solar cell panel respectively, each limit of base upper surface has certain contained angle with each solar cell panel, each solar cell panel with the base passes through the bracing piece and connects.

3. The system of claim 1, wherein the energy manager comprises a DC-DC1 circuit and a DC-DC2 circuit, wherein:

the energy manager judges the states of the solar cell array, the energy storage battery pack, the distributor and the load, and automatically matches the relation between power generation and the load, so that the energy generated by the solar cell array meets the energy balance and the bus voltage is kept stable;

the DC-DC1 circuit is used for tracking the maximum power of the solar battery array, charging the main energy storage battery pack and providing voltage for the bus;

the DC-DC2 circuit is used to convert the bus voltage to a constant voltage output.

4. the system as claimed in claim 2, wherein the four sets of solar cells are telescopic, and the angles between the four sets of solar cells around the high-altitude balloon pod and the plane of the high-altitude balloon pod can be adjusted according to different flight missions.

5. the system of claim 1, wherein the power distributor comprises a plurality of voltage regulation modules, each of which outputs a target voltage of a different voltage or a target current of a different current to meet the demand of the load;

The distributor further comprises a relay for automatically switching to the emergency energy storage battery pack when the main energy storage battery pack fails.

Technical Field

The invention relates to the technical field of energy, in particular to a circulating energy power supply system suitable for a high-altitude balloon.

background

Aerostatics refer to aircraft that are levitated using a buoyant medium such as hydrogen or helium. Aerostats can be broadly classified into captive balloons, high-altitude balloons, airships and the like. In recent years, the unique resource advantage of the adjacent space has become a focus of attention of various countries. The high-altitude balloon generally works in the middle and lower part of an adjacent space and is 20-50 km away from the ground, belongs to an unpowered aerostat, and has great application value in the aspects of research on cosmic rays and electromagnetic radiation, communication through the high-altitude balloon, ground observation, remote sensing and the like by utilizing a payload carried by the high-altitude balloon.

Compared with a sounding rocket, the high-altitude balloon has lower flying speed, better stability and higher earth observation precision; compared with a satellite or a space plane, the high-altitude balloon has a lower operation orbit and a more free distribution space and window; in addition, compared with the platforms, the high-altitude balloon one-time flight test has low cost and wider application prospect and development potential.

The existing domestic high-altitude balloon power supply mostly adopts an energy storage battery pack power supply mode, but the energy storage battery pack cannot be used continuously after the electric quantity is used up, the long-endurance flight of the high-altitude balloon cannot be realized, and the long-endurance flight has great significance for the high-altitude balloon application.

Therefore, the invention is needed to invent a renewable circulating energy system suitable for the high-altitude balloon flying during long endurance, and solve the problem of the high-altitude balloon flying during long endurance.

disclosure of Invention

In order to solve the above problems, embodiments of the present invention provide a power supply system using cyclic energy suitable for a high-altitude balloon.

the embodiment of the invention provides a circulating energy power supply system suitable for a high-altitude balloon, which comprises:

the solar energy storage battery pack comprises a main energy storage battery pack and an emergency energy storage battery pack, wherein the solar energy storage battery pack is connected with a first end of the energy manager, the main energy storage battery pack is connected with a second end of the energy manager, a third end of the energy manager is connected with a first end of the power distributor, a second end of the power distributor is connected with a load, and a third end of the power distributor is connected with the emergency energy storage battery pack;

the solar cell array consists of five groups of solar cells in all, is distributed on the periphery and the upper surface of the high-altitude balloon pod and is used for converting solar energy into electric energy;

The main energy storage battery pack is used for supplying power to the load in the no-sun-illumination time period, and the emergency energy storage battery pack is used for supplying power to an important load when the main energy storage battery pack breaks down;

the energy manager charges the energy storage battery pack by using the solar battery array, supplies power to the load and tracks the maximum power of each group of solar batteries respectively;

The distributor is used for converting bus voltages output by the solar cell array and the energy storage battery pack into voltages required by different loads; and on the other hand, the emergency energy storage battery pack is automatically switched to when the main energy storage battery pack has a fault.

Preferably, any four groups of solar cells in the solar cell array are arranged around the high-altitude balloon pod, a fifth group of solar cells are arranged on the upper surface of the high-altitude balloon pod, and the four groups of solar cells are arranged in a single-axis tracking type four-side structure;

Wherein, single-axis tracking formula four sides structure specifically includes: base, solar cell panel and a plurality of bracing piece, the base is the tetragonal body, each limit of base upper surface is connected with each solar cell panel respectively, each limit of base upper surface has certain contained angle with each solar cell panel, each solar cell panel with the base passes through the bracing piece and connects.

Preferably, the energy manager comprises a DC-DC1 circuit and a DC-DC2 circuit, wherein:

The energy manager judges the states of the solar cell array, the energy storage battery pack, the distributor and the load, and automatically matches the relation between power generation and the load, so that the energy generated by the solar cell array meets the energy balance and the bus voltage is kept stable;

The DC-DC1 circuit is used for tracking the maximum power of the solar battery array, charging the main energy storage battery pack and providing voltage for the bus;

The DC-DC2 circuit is used to convert the bus voltage to a constant voltage output.

preferably, the method further comprises the following steps: the support rods of the four groups of solar cells around the high-altitude balloon pod are all of telescopic structures, and included angles between the four groups of solar cells around the high-altitude balloon pod and the plane of the high-altitude balloon pod are adjusted according to different flight tasks.

Preferably, the power distributor comprises a plurality of voltage stabilizing modules, and each voltage stabilizing module outputs target voltages with different voltage magnitudes or target currents with different current magnitudes so as to meet the requirements of the load;

the distributor further comprises a relay for automatically switching to the emergency energy storage battery pack when the main energy storage battery pack fails.

The embodiment of the invention utilizes the renewable photovoltaic circulating energy power supply system consisting of the solar cell and the energy storage battery pack to realize energy balance during the flight of the energy system and solve the problem that the high-altitude balloon cannot fly for a long time.

drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a circulating energy power supply system suitable for a high-altitude balloon according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an installation structure of a solar cell array according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of the inside of an energy manager and a schematic diagram of the connection relationship between a solar cell array, an energy storage battery pack and a distributor according to an embodiment of the present invention;

Fig. 4 is an internal structural view of a power distributor in an embodiment of the present invention;

FIG. 5 is a schematic diagram of the DC-DC1 circuit connection in the energy manager according to the embodiment of the invention;

fig. 6 is a schematic diagram of the DC-DC2 circuit connection in the energy manager according to the embodiment of the invention.

Detailed Description

in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a schematic structural diagram of a cyclic energy power supply system suitable for a high-altitude balloon according to an embodiment of the present invention, where the system includes: the solar energy storage battery pack comprises a solar battery array 101, an energy manager 102, a distributor 103 and an energy storage battery pack, wherein the energy storage battery pack comprises a main energy storage battery pack 105 and an emergency energy storage battery pack 106, the solar battery array is connected with a first end of the energy manager, the main energy storage battery pack is connected with a second end of the energy manager, a third end of the energy manager is connected with a first end of the distributor, a second end of the distributor is connected with a load 104, and a third end of the distributor is connected with the emergency energy storage battery pack;

The solar cell array consists of five groups of solar cells in all, is distributed on the periphery and the upper surface of the high-altitude balloon pod and is used for converting solar energy into electric energy;

The main energy storage battery pack is used for supplying power to the load in the no-sun-illumination time period, and the emergency energy storage battery pack is used for supplying power to an important load when the main energy storage battery pack breaks down;

the energy manager charges the energy storage battery pack by using the solar battery array, supplies power to the load and tracks the maximum power of each group of solar batteries respectively;

the distributor is used for converting bus voltages output by the solar cell array and the energy storage battery pack into voltages required by different loads; and on the other hand, the emergency energy storage battery pack is automatically switched to when the main energy storage battery pack has a fault.

specifically, the solar battery array is connected with a first end of the energy manager, the energy storage battery pack is connected with a second end of the energy manager, a third end of the energy manager is connected with a first end of the distributor, a second end of the distributor is connected with the load, and a third end of the distributor is connected with the emergency energy storage battery pack.

If the energy manager judges that the load can normally work in the daytime, the solar cell array can generate enough energy, at the moment, the solar cell array charges the energy storage battery pack through the energy manager, the solar cell array discharges through the energy manager, and the distributor converts the discharged energy of the solar cell array into the voltage required by different loads to supply power for the loads. If the energy manager judges that the load is in the peak power consumption state, the pure solar cell array cannot meet the requirement of the load, and the solar cell array and the energy storage battery pack are combined to supply power to the load.

Therefore, the solar cell array and the energy storage battery pack are discharged by the energy manager at the same time, and the electric energy released by the solar cell array and the energy storage battery pack may not meet the rated voltage or the rated current of the load, so that the electric energy released by the solar cell array and the energy storage battery pack needs to be converted into the voltage required by different loads by using a power distributor to supply power to the load.

if the energy manager judges that the solar cell array is not in the working state, namely under the condition of being at night, the energy storage battery pack discharges through the energy manager, and the distributor converts the discharged energy of the energy storage battery pack into target electric quantity to supply power for the load.

the circulating energy power supply system suitable for the high-altitude balloon provided by the embodiment of the invention can utilize the solar cell array and the energy storage battery pack to supply power to the load, solves the problem that the balloon in the prior art is insufficient in electric quantity in the flying process, realizes energy balance during flying, solves the problem that the high-altitude balloon cannot be parked in the air for a long time, can effectively prolong the parking time of the high-altitude balloon, provides stable and reliable energy supply for the platform and the load, and is also suitable for being used for all high-altitude long-endurance scientific balloon platforms.

if the energy manager judges that the solar cell array and the main energy storage battery pack both have faults and cannot provide electric energy for the load, the emergency energy storage battery pack supplies power for the load at the moment.

specifically, the solar cell array provided by the embodiment of the invention adopts a semi-flexible efficient thin crystalline silicon solar cell, and the solar cell has high photoelectric conversion efficiency and certain flexibility, is convenient for cell laying in a design process, has low surface density and can effectively reduce the quality of an energy circulation system.

the main energy storage battery pack and the emergency energy storage battery pack in the embodiment of the invention adopt lithium ion storage batteries which are energy storage units with higher energy density and performance price ratio in the common storage batteries at present.

Tests show that the circulating energy power supply system can stably work in a low-temperature and low-air-pressure high-altitude environment at the temperature of-60 ℃/0.5kPa-100kPa for a long time, and has good reliability.

On the basis of the above embodiment, preferably, any four groups of solar cells in the solar cell array are installed around the high-altitude balloon pod, and the remaining group is installed on the upper surface of the high-altitude balloon pod, and the any four groups of solar cells are installed in a single-axis tracking four-side structure;

Wherein, single-axis tracking formula four sides structure specifically includes: base, a plurality of solar cell panel and a plurality of bracing piece, the base is the tetragonal body, each limit of base upper surface is connected with each solar cell panel respectively, each limit of base upper surface has certain contained angle with each solar cell panel, each solar cell panel with the base passes through the bracing piece and connects.

Fig. 2 is a schematic view of an installation structure of a solar cell array in an embodiment of the present invention, as shown in fig. 2, a dotted line portion in the figure is a solar cell panel, a thick black line in the figure indicates a support rod, and an installation manner of the solar cell array is an installation manner of laying a single-axis tracking type four-sided structure. The method changes the support rod into a telescopic structure on the basis of the existing fixed inclination angle laying method, thereby greatly reducing the occupied volume. And the support rods can adjust the included angles between the four groups of solar cells around the high-altitude balloon pod and the plane of the high-altitude balloon pod according to different flight tasks.

the supporting rods are only unfolded in the air tracking state, so that the area of the solar cell array is also reduced. This energy circulation system only need simple two quadrant sensor can, every solar cell panel uses the motor tracking of unipolar, adopts the utricule material of ultra high molecular polyethylene as the intermediate level, lays it on the carbon fiber pipe and makes up the four sides and fix, then fixes solar cell with the thread gluing, prevents that violent vibrations from arousing the damage of solar cell array.

In the embodiment of the invention, the solar cell array is combined with the carbon fiber support, so that the weight of the nacelle is effectively reduced.

the specific method comprises the following steps: the ultra-high molecular polyethylene bag body material is used as the middle layer, the bag body material is laid on the carbon fiber tube and four edges of the carbon fiber tube are sewn for fixing, and then the solar cell is fixed by the thread gluing, so that the damage of the solar cell caused by severe vibration is prevented. Considering the stress strength of the support rod and the convenience of the installation mode, the support arm framework is vertical to the battery panel, and the support point is arranged at the lower corner of the nacelle.

Fig. 3 is a schematic diagram of the inside of an energy manager and a connection relationship between a solar cell array, an energy storage battery pack and a power distributor according to an embodiment of the present invention, as shown in fig. 3, the energy manager includes a DC-DC1 circuit and a DC-DC2 circuit, where:

The energy manager judges the states of the solar cell array, the energy storage battery pack, the distributor and the load, and automatically matches the relation between power generation and the load, so that the energy generated by the solar cell array meets the energy balance and the bus voltage is kept stable;

The DC-DC1 circuit is used for tracking the maximum power of the solar battery array, charging the main energy storage battery pack and providing voltage for the bus;

the DC-DC2 circuit is used to convert the bus voltage to a constant voltage output.

in the daytime, the solar cell array charges the energy storage battery pack through the maximum power state of the energy manager and supplies power to the load through the distributor, and the distributor converts the discharge energy of the solar cell array into the voltage required by different loads to supply power to the load.

If the load is in a peak power consumption state, a pure solar cell array cannot meet the requirement of the load, the solar cell array and the energy storage battery pack are required to be combined to supply power to the load, the solar cell supplies power to the load through the DC-DC1 circuit and the DC-DC2 circuit and the distributor, and the energy storage battery pack supplies power to the load through the DC-DC2 circuit and the distributor.

If the load is in a non-working state, the solar battery charges the energy storage battery pack through the maximum power of the energy manager, and when the energy storage battery pack is fully charged gradually, the energy manager enables the solar battery to be in a non-maximum power state until the solar battery pack is opened.

At night, the solar cell array is in a non-working state, the energy storage battery pack discharges through the energy manager, and the distributor converts the discharging energy of the solar cell array into the voltage required by different loads to supply power for the loads.

Fig. 4 is an internal structural diagram of a power distributor according to an embodiment of the present invention, and as shown in fig. 4, the power distributor includes a plurality of voltage regulation modules, each of which outputs a target voltage with a different voltage or a target current with a different current to meet the requirement of the load;

The distributor further comprises a relay for automatically switching to the emergency energy storage battery pack when the main energy storage battery pack fails.

Specifically, the distributor internally comprises a plurality of voltage stabilizing modules, and each voltage stabilizing module converts electric energy released by the solar cell array and/or the energy storage battery pack into target electric quantity with different voltages or target electric quantity with different currents. For example, some loads are rated at 24V, and other loads are rated at 12V, and in order to meet the requirements of different loads, some voltage stabilizing modules convert the released electric energy into 24V voltage, and other voltage stabilizing modules convert the released electric energy into 12V voltage. The specific models are VICOR V24C24T100BL and V24C12T100BL, etc., and the power is 100W.

Fig. 5 is a schematic diagram of the connection of the DC-DC1 circuit in the energy manager according to the embodiment of the present invention, and as shown in fig. 5, the connection relationship of the terminals of the circuit is as follows:

The direct current input signals of the solar cells have 5 groups, namely PV1_1+ and PV1_1-, PV2_1+ and PV2_1-, PV3_1+ and PV3_1-, PV4_1+ and PV4_1-, PV5_1+ and PV5_ 1-. The circuit topology structures of the 5 groups of solar cells are similar, and signals are connected to the BAT + and BAT-ends in parallel. Taking the first path of solar cell input as an example, PV1_1+ is connected with an R1_1 resistor and a D1_1 diode, a sampling resistor R1_3 is connected between PV1_1 and GND, R1_1 and R1_2 resistors are connected in series between PV1_1+ and PV1_1-, and the connection of the two is an input voltage sampling signal UfIn1+, which plays a role of scaling the sampling voltage, a diode D1_1 plays a role of preventing current from flowing backwards, the anode of D1_1 is PV1_1+, the cathode of D1_1 is connected with a capacitor C1_1, the other end of the cathode of D1_1 is connected with a power tube Q1_1, the gate of Q1_1 is connected with the driving chip, a freewheeling diode D1_2 is connected between the source of Q1_1 and ground, a capacitor C1_2 is connected in series with a freewheeling diode R1_4, and then connected with the other end of Q1_ 3_ 1_3 and the source of Q1_ 3_ 1_3, and the other end of the freewheeling diode 1_1 are also connected with a freewheeling, the negative electrode of D1_3 is connected to battery voltage BAT +, BAT + is separated from ground by C1_3, BAT + and BAT-are directly connected with resistors R1_7 and R1_8 in series, the connection of the two is an output voltage sampling signal UfOut, a current sampling resistor R1_6 is arranged between BAT-and ground, and two ends of the current sampling resistor R1_6 are used as input ends IfOut + and IfOut-of the output current sampling circuit.

Fig. 6 is a schematic diagram of the connection of the DC-DC2 circuit in the energy manager according to the embodiment of the present invention, and as shown in fig. 6, the connection relationship of the terminals of the circuit is as follows:

BAT + and BAT-ends of the energy storage battery can realize bus full regulation through DC-DC2, the topological structure is a four-tube buck-boost DC-DC conversion circuit, the source of a power tube Q6_1 is connected to the drain of Q6_2, the source of Q6_2 is connected to BAT-, the source of Q6_1 is connected with the drain of Q6_4 through an inductor L6_1, the drain of Q6_4 is connected with the drain of Q6_3, the source of Q6_3 is connected to BAT-, the source of Q6_4 is connected with BAT-through C6_1, a resistor R6_1 and R6_2 are connected in series and then connected with C6_1 in parallel to play a role of voltage sampling, wherein two ends of C6_1 are respectively an output end Uout + and Uout-of DC-DC 2.

the energy manager functions as: a, tracking a maximum power point of a solar cell; b, charging the energy storage battery pack by the solar battery through an energy manager, and discharging the energy storage battery pack through the energy manager; and d, providing stable bus voltage for the distributor.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.