All-weather in-situ self-powered system

Abstract

The invention provides an all-weather in-situ self-powered system, which comprises a photo-thermal coupling power generation module, a vibration energy collection module, a task load module and an energy management module, and is characterized in that the photo-thermal coupling power generation module is used for converting light energy and heat energy into electric energy and sending the electric energy to the energy management module; the vibration energy collection module is used for converting kinetic energy of sea wave vibration into electric energy and sending the electric energy to the energy management module; the task load module is used for collecting and sending ocean information; and the energy management module is used for managing the received electric energy and supplying power to the task load module. The system has the beneficial effects that through a multi-energy complementary mode, the system can continuously supply power under different weather conditions, and is not influenced by illumination and sea wave fluctuation; the energy management module ensures that the system can provide stable power support for the task load module under various conditions, can stably operate in a complex and changeable marine environment, and is suitable for long-term unattended application scenarios.

Description

Technical Field

[0001] The invention belongs to the field of marine engineering, and in particular relates to an all-weather in-situ self-powered system. Background Art

[0002] For ocean information monitoring nodes that need to work stably for a long time, there is an urgent need for all-weather working, low output impedance, and high output power electrical energy. There is abundant solar energy in the marine environment, and photovoltaic cells can be used to achieve higher output power under conditions of sufficient sunshine. However, photovoltaic cells have high requirements for the intensity of solar radiation. In random and changeable natural meteorological conditions, the output performance of photovoltaic cells is easily affected by environmental conditions, which in turn causes a decrease in output power, making it difficult to achieve all-weather energy collection.

[0003] To address this problem, the present invention proposes an all-weather in-situ self-powered system composed of a wave-based vibration energy collector, a high-efficiency photovoltaic cell, and a thermoelectric cell. The all-weather working characteristics of the vibration energy collector, the voltage output characteristics of the thermoelectric cell with a slight temperature difference, and the high-power output characteristics of the photovoltaic cell are undoubtedly a more optimized solution for the ocean energy system. Through efficient composite energy management, the environmental adaptability of the system and the stability of power output are greatly improved. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an all-weather in-situ self-powered system, which is particularly suitable for marine information monitoring activities in an environment requiring self-powered supply.

[0005] The technical solution adopted by the present invention is to provide an all-weather in-situ self-powered system, comprising:

[0006] A photothermal coupled power generation module is used to convert light energy and thermal energy into electrical energy and send the electrical energy to an energy management module;

[0007] A vibration energy harvesting module, which is used to convert the kinetic energy of the wave vibration into electrical energy and send the electrical energy to the energy management module;

[0008] Mission payload module, used to collect ocean information and send it;

[0009] The energy management module is used to manage the received electrical energy and supply power to the mission payload module.

[0010] Furthermore, the solar-thermal coupled power generation module includes:

[0011] Photovoltaic cells, which convert light energy into electricity;

[0012] Thermoelectric cells, which convert heat into electricity;

[0013] The phase change unit is used to store the thermal energy of the photovoltaic cell unit and transfer it to the thermoelectric cell unit.

[0014] Furthermore, the photovoltaic cell units, phase change cells and thermoelectric cell units are arranged in sequence according to the direction of sunlight exposure.

[0015] Furthermore, a stepped structure array with a diameter of 300 nm is introduced into the surface of the photovoltaic cell in the photovoltaic cell unit through a dielectric film layer, and the average reflectivity of the spectrum within the range of 300 nm to 1800 nm does not exceed 2.4%.

[0016] Furthermore, the phase change material of the phase change unit is expanded graphite, the mass fraction thereof is in the range of 8% to 16%, the phase change temperature range is 20° C. to 40° C., and the phase change latent heat is 192 J / g to 228 J / g.

[0017] Furthermore, the mission payload module includes:

[0018] Data monitoring unit, which collects information about the surrounding ocean through sensors;

[0019] The signal transmission unit sends the collected information to the user terminal.

[0020] The advantages and positive effects of the present invention are as follows: due to the adoption of the above technical scheme, the system can continuously supply power under different weather conditions through the complementary mode of multiple energy sources, and is not affected by light and wave fluctuations; the photovoltaic cell unit significantly reduces the reflectivity and improves the light absorption efficiency through optimized design, and the thermoelectric cell unit can work efficiently under lower temperature difference conditions, and the power generation efficiency is significantly improved; the energy management module can intelligently allocate and manage energy to ensure that the system can provide stable power support for the mission payload module under various conditions. It is specially designed for the marine environment, can operate stably in complex and changeable marine environments, and is suitable for long-term unattended application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of a self-powered system according to an embodiment of the present invention

[0022] Figure 2 Schematic diagram of a photothermal coupling power generation module according to an embodiment of the present invention

[0023] Figure 3 Schematic diagram of a mission payload module according to an embodiment of the present invention DETAILED DESCRIPTION

[0024] The present disclosure is described more fully below with reference to the accompanying drawings, in which exemplary embodiments of the present disclosure are described. The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0025] like Figure 1 As shown, the present invention provides an all-weather in-situ self-powered system, including a photothermal coupling power generation module 100, a vibration energy collection module 200, a mission payload module 300 and an energy management module 400. The photothermal coupling power generation module 100 is used to convert light energy and thermal energy into electrical energy, and send the electrical energy to the energy management module 400; the vibration energy collection module 200 is used to convert the kinetic energy of wave vibration into electrical energy, and send the electrical energy to the energy management module 400; the mission payload module 300 is used to collect and send ocean information; the energy management module 400 is used to manage the received electrical energy and power the mission payload module 300.

[0026] The comprehensive power generation efficiency of the photothermal coupling power generation module 100 exceeds 40%. The lower surface of the photothermal coupling power generation module 100 is also provided with a sealed shell, in which a vibration energy collection module 200, a mission load module 300 and an energy management module 400 are arranged. The surface of the shell is sprayed with a Zn-Ni metal coating that is 1μm to 3μm thick to prevent corrosion such as salt spray and seawater. The vibration energy collection module 200 uses low-frequency vibration (1Hz to 3Hz) of ocean wave energy as an energy source and realizes electrical energy output based on the principle of electromagnetic induction. Under the condition of 1Hz to 3Hz lateral vibration, the rated output power is ≥180W / m 3 , peak output power density ≥ 2000W / m. The energy management module 400 receives the electric energy output from the photothermal coupling power generation module 100 and the vibration energy collection module 200, tracks the maximum power points of photovoltaic and thermoelectric cells respectively through MPPT, and then processes the output voltage through the boost unit to meet the voltage requirements of the mission payload module 300. The mission payload module 300 includes but is not limited to TDS water quality probe sensor, digital temperature sensor, electrode pH sensor, dissolved oxygen sensor, and realizes real-time monitoring and collection of seawater temperature, pH value, dissolved oxygen, TDS and other data.

[0027] Under light conditions, the photothermal coupling power generation module 100 uses sunlight to achieve power conversion and output, and the vibration energy collection module 200 uses the lateral vibration energy of the waves to generate electricity; under lightless conditions, the vibration energy collection module 200 outputs power alone; all the output power of the two is managed by the energy management module 400 and then distributed to the mission load module 300, and the seawater temperature, pH value, dissolved oxygen, TDS and other data are monitored in real time through the TDS water quality probe sensor, digital temperature sensor, electrode pH sensor, dissolved oxygen sensor, and dissolved oxygen sensor, and are regularly transmitted back to the shore ship receiving server. Through the complementary method of multiple energy sources, the system can continuously supply power under different weather conditions and is not affected by light and wave fluctuations.

[0028] In one embodiment, if Figure 2 As shown, the solar-thermal coupling power generation module 100 includes a photovoltaic cell unit 101, a thermoelectric cell unit 102 and a phase change unit 103. The photovoltaic cell unit 101 is used to convert light energy into electrical energy; the thermoelectric cell unit 102 is used to convert thermal energy into electrical energy; the phase change unit 103 is used to store the thermal energy of the photovoltaic cell unit and transfer it to the thermoelectric cell unit 102.

[0029] The thermoelectric cell in the thermoelectric cell unit 103 is a low-temperature BiTe-ZnSb system, and the monomer integration is ≥132 / cm 2 , under the conditions of working temperature of 35℃~45℃ and temperature difference of 8K~15K, the power generation efficiency is ≥2.5%.

[0030] Preferably, the photovoltaic cell unit 101 adopts a flexible lattice mismatched IMM-4J GA photovoltaic cell, the average reflectivity of the spectrum in the range of 300nm to 1800nm ​​is 2.24%, and the power generation efficiency under natural light conditions is 38.07%; the thermoelectric cell unit 102 adopts a TEG-1010112L thermoelectric cell, the cell thickness is 2.5mm, and the monomer integration is 144 / cm 2 , working temperature is 37℃, and the power generation efficiency is 2.73% under the condition of temperature difference of 10K; the phase change unit 103 adopts paraffin-expanded graphite PA-GE16 composite phase change unit, the phase change material is an aluminum alloy shell with a thickness of 0.8cm, the phase change temperature is 32℃, the mass ratio of expanded graphite is 14, the thermal conductivity is 8.42W / mK, and the phase change latent heat is 192.3J / g.

[0031] In one embodiment, the photovoltaic cell unit 101, the phase change unit 103 and the thermoelectric cell unit 102 are arranged in sequence according to the direction of sunlight exposure and are integrated into one by a semiconductor bonding process.

[0032] In one embodiment, a stepped structure array with a diameter of 300 nm is introduced into the surface of the photovoltaic cell in the photovoltaic cell unit 101 through a dielectric film layer, and the average reflectivity of the spectrum within the range of 300 nm to 1800 nm does not exceed 2.4%.

[0033] The photovoltaic cell in the photovoltaic cell unit 101 is a III-V group system, which is specially designed for the spectrum near the sea surface, and uses the quantum confinement effect to optimize the cell band gap width, so that the photovoltaic cell power generation efficiency is ≥38%.

[0034] In one embodiment, the phase change material of the phase change unit 103 is expanded graphite, the mass fraction thereof is in the range of 8% to 16%, the phase change temperature range is 20°C to 40°C, the phase change latent heat is 192J / g to 228J / g, and an aluminum alloy shell is provided on the outer surface of the phase change unit 102.

[0035] Through optimized design, photovoltaic cell units have significantly reduced reflectivity and improved light absorption efficiency. Thermoelectric cell units can work efficiently under lower temperature difference conditions, and the power generation efficiency is significantly improved.

[0036] In one embodiment, if Figure 3 As shown, the mission payload module 300 includes a data monitoring unit 301 and a signal transmission unit 302. The data monitoring unit 301 collects surrounding ocean information through sensors; the signal transmission unit 302 sends the collected information to the user terminal.

[0037] The energy management module can intelligently allocate and manage energy to ensure that the system can provide stable power support for the mission payload module under various conditions. It is specially designed for the marine environment and can operate stably in complex and changeable marine environments. It is suitable for long-term unmanned application scenarios.

[0038] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An all-weather in-situ self-powered system, characterized in that: include: A photothermal coupled power generation module is used to convert light energy and thermal energy into electrical energy and send the electrical energy to an energy management module; A vibration energy harvesting module, which is used to convert the kinetic energy of the wave vibration into electrical energy and send the electrical energy to the energy management module; Mission payload module, used to collect ocean information and send it; The energy management module is used to manage the received electrical energy and supply power to the mission payload module.

2. The all-weather in-situ self-powered system according to claim 1, characterized in that: The solar-thermal coupled power generation module includes: Photovoltaic cells, which convert light energy into electricity; Thermoelectric cells, which convert heat into electricity; The phase change unit is used to store the thermal energy of the photovoltaic cell unit and transfer it to the thermoelectric cell unit.

3. The all-weather in-situ self-powered system according to claim 2, characterized in that: Photovoltaic cell units, phase change cells and thermoelectric cell units are arranged in sequence according to the direction of sunlight.

4. The all-weather in-situ self-powered system according to claim 2, characterized in that: The surface of the photovoltaic cell in the photovoltaic cell unit is introduced with a stepped structure array with a diameter of 300nm through a dielectric film layer, and the average reflectivity of the spectrum within the range of 300nm to 1800nm ​​does not exceed 2.4%.

5. The all-weather in-situ self-powered system according to claim 2, characterized in that: The phase change material of the phase change unit is expanded graphite, the mass fraction of which is in the range of 8% to 16%, the phase change temperature range is 20° C. to 40° C., and the phase change latent heat is 192 J / g to 228 J / g.

6. The all-weather in-situ self-powered system according to claim 1, characterized in that: The mission payload modules include: Data monitoring unit, which collects information about the surrounding ocean through sensors; The signal transmission unit sends the collected information to the user terminal.

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