Photovoltaic-thermoelectric coupled flexible energy collection device

Abstract

The invention provides a photovoltaic-thermoelectric coupled flexible energy collection device, and belongs to the field of energy. Comprising a condensation layer, a photovoltaic power generation layer, an energy management module, a thermoelectric power generation layer and a heat conduction layer. The light gathering layer is used for gathering ambient light to the photovoltaic power generation layer; the photovoltaic power generation layer converts light energy into electric energy and outputs the electric energy to the energy management module; the thermoelectric power generation layer is arranged between the photovoltaic power generation layer and the wearing carrier; when the thermoelectric power generation layer works in the mode 1, thermoelectric power generation between the photovoltaic power generation layer and the carrier is used and output to the energy management module; and when the thermoelectric power generation layer works in the mode 2, the energy management module and / or the photovoltaic power generation layer provide electric energy, and the thermoelectric power generation layer generates heat energy or absorbs heat energy by using the Peltier effect to supplement or release heat energy for the carrier. According to the energy collection device, photovoltaic power generation and thermoelectric power generation are fused, and meanwhile, the Peltier effect is utilized to convert electric energy into heat energy under specific conditions, so that a heating or cooling function is provided for a human body or equipment.

Description

Technical Field

[0001] The invention relates to the field of energy technology, and in particular to a photovoltaic-thermoelectric coupled flexible energy collection device. Background Art

[0002] Wearable devices are becoming an indispensable part of daily life and the military field due to their convenience and functionality. In daily life, wearable blood pressure monitors and heart rate monitors can protect people's physical health; in the military field, wearable drone controllers, wearable night vision devices and other equipment also provide stronger support for individual combat. While wearable devices bring great convenience, the energy supply challenges they face are also worthy of attention. With more and more functional integration, the power consumption of wearable devices is also increasing. Most of the existing wearable devices on the market use rechargeable batteries to power the entire device. Due to the limited battery capacity, the device's battery life is inevitably short, which in turn leads to a high frequency of charging of the device, which brings great inconvenience to the use of the device, especially the use of equipment in the military field.

[0003] At present, research on energy supply devices for wearable devices includes solar energy collection devices, piezoelectric energy collection devices, radio frequency energy collection devices, and thermoelectric energy collection devices. Such research aims to collect energy from the environment or the human body, and convert such energy into electrical energy that can be directly used by low-power devices. However, on the one hand, the existing technology does not fully utilize the integration of multi-source energy, and on the other hand, the energy collection device is expensive and has a single application scenario. These factors still restrict the development of wearable energy collection devices. Summary of the invention

[0004] In view of this, the present invention provides a photovoltaic-thermoelectric coupled flexible energy collection device, which can collect solar energy in the environment and use the temperature difference between the carrier wearing the flexible energy collection device and the photovoltaic power generation layer to achieve bidirectional thermoelectric conversion. At the same time, it can also actively control the temperature difference power generation layer to generate heat or absorb heat by powering on, thereby achieving temperature regulation of the carrier and completing the capture and conversion of multi-source energy.

[0005] In order to solve the above technical problems, the present invention is implemented as follows.

[0006] A photovoltaic-thermoelectric coupled flexible energy collection device is attached to a carrier; the flexible energy collection device is a flexible structure, integrating a light-collecting layer, a photovoltaic power generation layer, a thermoelectric power generation layer, a heat-conducting layer, and an energy management module; the light-collecting layer is used to collect ambient light to the photovoltaic power generation layer; the heat-conducting layer is located between two layers of components requiring heat transfer and / or the energy collection device and the carrier; the photovoltaic power generation layer converts light energy into electrical energy and outputs it to the energy management module; the thermoelectric power generation layer is arranged between the photovoltaic power generation layer and the carrier;

[0007] When the temperature difference power generation layer works in mode 1, the temperature difference between the photovoltaic power generation layer and the carrier is used to generate electricity, and the electricity is output to the energy management module;

[0008] When the thermoelectric power generation layer operates in mode 2, the energy management module and / or the photovoltaic power generation layer provides electrical energy, and the thermoelectric power generation layer generates heat energy or absorbs heat energy by using the Peltier effect to supplement or release heat energy for the carrier.

[0009] Preferably, the innermost layer of the flexible energy collection device is provided with temperature sensors to monitor the temperature; a switching module is provided in the energy management module, and when the monitored temperature is abnormal, the thermoelectric power generation function of the thermoelectric power generation layer is cut off; the photovoltaic power generation layer is directly connected to the thermoelectric power generation layer, and the photovoltaic power generation layer and the energy storage module of the energy management module supply power to the thermoelectric power generation layer, and the thermoelectric power generation layer generates or absorbs thermal energy using the Peltier effect.

[0010] Preferably, the energy management module includes a switch module for converting the positive and negative voltages outputted by the alternation of the hot and cold ends of the temperature difference power generation layer into a positive voltage.

[0011] Preferably, the light-concentrating layer is made of a flexible transparent material, and light-concentrating convex points are distributed and arranged on the surface. The diameter and thickness of the light-concentrating convex points are designed so that the photovoltaic power generation layer is located at the focus of the light-concentrating convex points.

[0012] Preferably, the light focusing layer is made of silica gel material.

[0013] Preferably, the temperature difference power generation layer includes a flexible packaging substrate, multiple pairs of N-type rigid thermoelectric semiconductors, and multiple pairs of P-type rigid thermoelectric semiconductors; the N-type rigid thermoelectric semiconductors and the P-type thermoelectric semiconductors are embedded in the flexible packaging substrate and connected through a conductive solution using screen printing technology.

[0014] Preferably, the N-type rigid thermoelectric semiconductor and the P-type rigid thermoelectric semiconductor are connected in thermal parallel and electrical series; the connection structures are both designed as serpentine structures.

[0015] Preferably, the energy management module comprises a first voltage stabilizing module of the photovoltaic power generation layer, a second voltage stabilizing module of the thermoelectric power generation layer, a power generation switch circuit, an energy supply switch circuit, and an energy storage module;

[0016] The photovoltaic power generation layer is connected to the energy storage module through the first voltage stabilizing module, and the electric energy generated by the photovoltaic power generation is stored in the energy storage module after voltage stabilization; the first voltage stabilizing module is also connected to the thermoelectric power generation layer; when the flexible energy collection device works in mode 2, the first voltage stabilizing module directly provides the electric energy generated by the photovoltaic power generation layer to the thermoelectric power generation layer, or stores the electric energy generated by the photovoltaic power generation layer in the energy storage module, and the energy storage module uniformly supplies power to the thermoelectric power generation layer;

[0017] The temperature difference power generation layer is connected to the power generation switch circuit, and the power generation switch circuit is connected to the energy storage module through the second voltage stabilizing module; the power generation switch circuit converts both the positive and negative voltages outputted by the alternation of the hot and cold ends of the temperature difference power generation layer into a positive voltage;

[0018] The thermoelectric power generation layer is further connected to an energy supply switch circuit, which is connected to an energy storage module; the energy supply switch circuit switches the polarity of the electric energy provided by the energy storage module to the thermoelectric power generation layer according to the heat release direction of the thermoelectric power generation layer.

[0019] Preferably, the heat conducting layer is arranged on two side surfaces of the temperature difference power generation layer (10).

[0020] Preferably, the flexible energy collection device adopts a strip structure with magnetic suction cups at both ends of the strip structure; the positive and negative electrodes of the flexible energy collection device are exposed on one of the magnetic suction cups; and the energy management module is arranged at one end of the strip structure.

[0021] Beneficial effects:

[0022] (1) The present invention uses a photovoltaic-thermoelectric coupling flexible energy collection device to integrate the solar energy in the collection environment and the heat emitted by the human body or equipment. Regardless of whether the temperature of the photovoltaic power generation layer is higher than the temperature of the human body or equipment, or the temperature of the human body or equipment is higher than the temperature of the photovoltaic power generation layer, temperature difference power generation can be performed to achieve maximum energy utilization. At the same time, the temperature difference power generation layer can also use the Peltier effect to convert the electrical energy provided by the energy management module or the photovoltaic power generation layer into an exothermic process or an endothermic process, thereby replenishing or releasing heat energy for the human body or equipment.

[0023] (2) The energy management module of the present invention is designed with a switching circuit. Considering that both human skin and the photovoltaic power generation layer can be used as heat sources to generate a temperature difference with each other, both ends of the thermoelectric semiconductor can be used as hot ends. When the hot and cold ends alternate, the positive and negative poles of the output voltage of the thermoelectric power generation layer will change accordingly. Therefore, a comparator and a switching circuit are designed in the energy management module to adjust the negative voltage of the thermoelectric power generation layer to a positive voltage before energy management is performed on the output electric energy of the thermoelectric power generation layer, so as to ensure that the overall output of the energy collection device is a direct current that can stably supply power to the wearable device.

[0024] (3) The present invention is designed with a temperature monitoring function. When the temperature of the human body or the equipment is abnormal, it can also automatically switch to the temperature difference power generation layer to generate heat energy or absorb heat energy using the Peltier effect, thereby providing heating or cooling function for the human body or the equipment.

[0025] (4) The thermoelectric power generation layer of the present invention adopts a flexible packaging substrate. The substrate is designed to have conductive solution grooves at both ends. N-type and P-type thermoelectric semiconductors are embedded in the substrate and connected through a conductive solution using screen printing technology. The connection method is designed to be a serpentine structure, which on the one hand enhances its ductility, and on the other hand enables direct contact with the heat source, thereby reducing the heat lost by indirect heat transfer from the substrate.

[0026] (5) The present invention statically reconstructs the solar cell array based on the full cross-connection mode of the solar cell, thereby improving the photovoltaic power generation efficiency and reducing the mismatch loss caused by uneven illumination.

[0027] (6) The energy collection device of the present invention is designed with magnetic connection at both ends to facilitate installation and removal of wearable devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The working block diagram of the energy harvesting device.

[0029] Figure 2 This is a schematic diagram of the structure of a photovoltaic-thermoelectric coupled flexible energy harvesting device.

[0030] Figure 3 Schematic diagram of the layered structure of a photovoltaic-thermoelectric coupled flexible energy harvesting device.

[0031] Figure 4 This is a schematic diagram of the external structure of the device.

[0032] Figure 5 Schematic diagram of the photovoltaic power generation layer structure.

[0033] Figure 6 Schematic diagram of the thermoelectric power generation layer structure.

[0034] Figure 7 It is the polarity conversion circuit at the output end of the temperature difference power generation layer.

[0035] Figure 8 This is a schematic diagram of the circuit for the energy management module to supply power to the thermoelectric power generation layer.

[0036] Among them, 1-energy collection belt, 2-energy management module, 301-magnetic suction cup, 302-magnetic fixed end, 401-device positive electrode, 402-device negative electrode, 5-temperature sensor, 6-light-collecting layer, 7-photovoltaic power generation layer, 801-photovoltaic power generation layer positive electrode, 802-photovoltaic power generation layer negative electrode, 9-thermal conductive layer, 10-thermoelectric power generation layer, 1101-thermoelectric power generation layer positive electrode, 1102 thermoelectric power generation layer negative electrode, 12-thermal conductive layer, 13-light-collecting bump, 14-solar cell, 15-photovoltaic power generation layer connecting wire, 1601-thermoelectric semiconductor (N type), 1602-thermoelectric semiconductor (P type), 17-conductive solution. DETAILED DESCRIPTION

[0037] The present invention proposes a photovoltaic-thermoelectric coupled flexible energy harvesting device that can be attached to a wearable carrier, such as a certain device or a human body. Figure 1 The schematic diagram is shown, and the flexible energy collection device is characterized in that it integrates a light-collecting layer, a photovoltaic power generation layer, a thermoelectric power generation layer and an energy management module. The light-collecting layer is used to collect ambient light to the photovoltaic power generation layer; the photovoltaic power generation layer converts light energy into electrical energy and outputs it to the energy management module; the thermoelectric power generation layer is arranged between the photovoltaic power generation layer and the carrier, such as the human body. When the temperature of the photovoltaic power generation layer is higher than or lower than the carrier, a temperature difference is generated, and electricity is generated by using the temperature difference and output to the energy management module. At the same time, the thermoelectric power generation layer can also use the Peltier effect to convert the electrical energy provided by the energy management module or the photovoltaic power generation layer into an exothermic process or an endothermic process, so as to supplement or release heat energy for the carrier. If the flexible energy collection device carries a wearable device, the energy management module can also power the electrical devices of the wearable device.

[0038] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0039] Figure 1 The present invention is an embodiment of a photovoltaic-thermoelectric coupled flexible energy harvesting device used in a wearable wristband. Figure 2 is a schematic diagram of the structure of the flexible energy harvesting device. Figure 3 A schematic diagram of the hierarchical structure of a photovoltaic-thermoelectric coupled wearable energy harvesting device. Figure 4 This is a schematic diagram of the outer structure of the device. Figure 5 Schematic diagram of the photovoltaic power generation layer structure. Figure 6 Schematic diagram of the thermoelectric power generation layer structure. Figure 7 It is the polarity conversion circuit at the output end of the temperature difference power generation layer. Figure 8 This is a schematic diagram of the circuit for the energy management module to supply power to the thermoelectric power generation layer.

[0040] In this example, the wearable energy collection device is a belt-shaped structure with magnetic structures at both ends, which is convenient for connecting wearable devices. The photovoltaic power generation layer 7 and the thermoelectric power generation layer 10 are integrated in the energy collection belt 1. The outermost layer of the energy collection belt 1 is a focusing layer 6, and the innermost layer is close to the human skin. Preferably, a second thermal conductive layer 12 is also provided in the innermost layer of the belt-shaped structure to be close to the human skin. Preferably, a first thermal conductive layer 9 is provided between the photovoltaic power generation layer 7 and the thermoelectric power generation layer 10. The thermal conductive layer can be provided between any two layers in order to increase the thermal conductivity efficiency and protect the functional layer.

[0041] For the strip structure of this embodiment, an energy management module 2 is provided at one end of the energy collection strip to manage the electric energy converted by the photovoltaic power generation layer 7 and the temperature difference power generation layer 10. The energy management module 2 is connected to the magnetic suction cup 301, and the positive power supply electrode 401 and the negative power supply electrode 402 are exposed on the magnetic suction cup. In other embodiments, the setting position of the energy management module 2 and whether to use a connector in the form of a magnetic suction cup can be selected according to the physical shape of the energy collection device and the wearing method. Here, the energy management module 2 is set at one end of the strip structure to simplify the layout inside the strip.

[0042] The light-gathering layer 6 of this embodiment is a flexible, heat-resistant, transparent film material, and the surface thereof is designed and arranged with light-gathering convex points 13, which play the light-gathering role of a convex lens as a whole. By designing the diameter and thickness of the light-gathering convex points 13, the photovoltaic power generation layer 7 is located at the focus of the light-gathering convex points 13, thereby increasing the amount of solar energy absorbed by the photovoltaic power generation layer 7 and enhancing the power generation efficiency. At the same time, the surface convex points will provide protection for the entire device. The number and spacing of the convex points are designed according to the required degree of flexibility and the required protection strength.

[0043] See also Figure 4 Preferably, the focusing layer 6 can be made of silica gel material, which can dissipate heat while playing the focusing function, ensuring that the photovoltaic power generation layer can work within a normal temperature range.

[0044] See also Figure 5 In this embodiment, multiple flexible solar power generation sheets 14 are distributed on the photovoltaic power generation layer 7. Light passes through the outermost light-collecting layer 1 and irradiates into the photovoltaic power generation layer 7. The multiple solar power generation sheets 14 on the photovoltaic power generation layer 7 convert solar energy into electrical energy, and enhance and aggregate the energy through array arrangement, and then transmit the electrical energy to the energy management module 2 for energy management. The electrical energy generated by the photovoltaic power generation layer 7 can also be provided to the thermoelectric power generation layer 10 after voltage stabilization, so that the thermoelectric power generation layer uses the Peltier effect to convert electrical energy into thermal energy or absorb heat to supplement or release heat energy for the human body or the device to adjust the temperature.

[0045] Each solar cell 14 is connected by a photovoltaic power generation layer connection wire. In this embodiment, the solar cells 14 are connected by a full cross connection method to improve the power generation efficiency of the system and minimize the mismatch loss caused by uneven illumination.

[0046] Furthermore, the connecting wires of the photovoltaic power generation layer 7 connect the positive electrode 801 and the negative electrode 802, and the two electrodes are made of solid materials such as metal copper sheets. For the strip structure, the positive electrode 801 and the negative electrode 802 of the photovoltaic power generation layer 7 can be set at one end of the strip, close to the position of the energy management module 2, so as to facilitate the transmission of the electric energy generated by the photovoltaic power generation layer 7 to the energy management module 2.

[0047] See also Figure 6, the thermoelectric power generation layer 10 of this embodiment adopts a flexible packaging substrate (PDMS), and the thermoelectric semiconductors are embedded in the flexible packaging substrate. The paired N-type thermoelectric semiconductors 1601 and P-type thermoelectric semiconductors 1602 are connected in a thermal parallel and electrical series manner, so that the hot end is on one side and the cold end is on the other side. The heat emitted by the human body is conducted to the lower end of the thermoelectric power generation layer 10 through the second thermal conductive layer 12, and the heat generated by the photovoltaic power generation layer 7 is conducted to the upper end of the thermoelectric power generation layer 10 through the first thermal conductive layer 9. The paired thermoelectric semiconductors on the thermoelectric power generation layer 10 generate electricity based on the thermoelectric effect by utilizing the temperature difference between the upper and lower ends, and transmit the electric energy to the energy management module 2 for energy management through the output positive electrode 1101 and the output negative electrode 1102 of the thermoelectric power generation layer 10, and integrate the electric energy generated by the photovoltaic power generation layer to power the wearable device.

[0048] The present invention does not limit the temperature of both sides of the thermoelectric semiconductor to be higher than that of the photovoltaic power generation layer 7 than that of the human body. When the external environment is relatively cold and the human body temperature is relatively high, the temperature provided to the thermoelectric power generation layer 10 by the heat emitted by the human body is higher than the temperature provided to the thermoelectric power generation layer 10 by the photovoltaic power generation layer 7, and the lower end of the thermoelectric power generation layer 10 is the hot end; conversely, when the ambient temperature is relatively high, the lower end of the thermoelectric power generation layer 10 is the cold end. When the hot and cold ends alternate, the positive and negative poles of the output voltage of the thermoelectric power generation layer will change accordingly.

[0049] In order to adapt to the reversal of the positive and negative polarity of the output voltage of the thermoelectric power generation layer, a power generation switch module needs to be designed in the energy management module 2. When the electric energy converted by the thermoelectric power generation layer 10 is output to the energy management module 2, the power generation switch circuit in the energy management module 2 first converts the negative voltage into a positive voltage, and then performs subsequent voltage stabilization and energy storage, etc., thereby providing stable electric energy for the wearable device.

[0050] Preferably, the circuit implementation method of the power generation switch circuit that converts negative voltage into positive voltage can adopt a group of fully controlled switching devices. When the voltage is positive, a pair of switches (S1, S4) are turned on; when the voltage is negative, another pair of switches (S2, S3) are turned on, thereby ensuring that the voltage entering the energy management circuit is positive. Figure 7 A schematic diagram showing a power generation switch circuit using a fully controlled switch device.

[0051] See also Figure 7 When the voltage polarity at the output end of the thermoelectric power generation layer is the same as the specified positive direction, switches S1 and S4 are turned on, and the voltage output to the energy management circuit is positive; when the voltage polarity at the output end of the thermoelectric power generation layer is opposite to the specified positive direction, switches S2 and S3 are turned on, and the voltage output to the energy management circuit is still positive. Preferably, the switch tube is a metal oxide semiconductor field effect tube (MOSFET).

[0052] Furthermore, an energy supply switch circuit is also required in the energy management module 2. When the flexible energy collection device works in mode 2, the energy supply switch circuit switches the polarity of the electric energy provided by the energy storage module to the thermoelectric power generation layer according to the heat release direction of the thermoelectric power generation layer. Figure 8 A schematic diagram showing the energy supply switch circuit using a fully controlled switch device is shown.

[0053] Furthermore, the thermoelectric semiconductors 1601 and 1602 are made of rigid thermoelectric materials such as bismuth telluride substrates having high ZT values ​​(thermoelectric figure of merit) at room temperature.

[0054] Preferably, the cold and hot ends of the thermoelectric semiconductors 1601 and 1602 are connected by a conductive solution 17. Then, a conductive solution groove is reserved in the flexible packaging substrate, and the conductive solution 17 is evenly applied by screen printing technology for connection. The connection method is designed as a serpentine structure, which ensures the power generation function of the thermoelectric semiconductor while enhancing its flexibility.

[0055] The energy management module 2 of this embodiment is concentrated at one end of the energy collection belt 1, including a first voltage stabilizing module of the photovoltaic power generation layer 7, a second voltage stabilizing module of the thermoelectric power generation layer 10, a power generation switch circuit, a power supply switch circuit, an energy storage module and necessary wires, etc.

[0056] The positive and negative electrodes (801, 802) of the photovoltaic power generation layer are connected to the energy storage module through the first voltage stabilizing module, and the electric energy generated by the photovoltaic power generation is stored in the energy storage module after voltage stabilization; the first voltage stabilizing module is also connected to the thermoelectric power generation layer; when the flexible energy collection device works in mode 2, the first voltage stabilizing module directly provides the electric energy generated by the photovoltaic power generation layer to the thermoelectric power generation layer, or stores the electric energy generated by the photovoltaic power generation layer into the energy storage module, and the energy storage module supplies power to the thermoelectric power generation layer uniformly.

[0057] The positive and negative electrodes (1101, 1102) of the thermoelectric power generation layer are connected to the power generation switch circuit, and after polarity conversion, they are connected to the energy storage module through the second voltage stabilizing module, and the electric energy generated by the thermoelectric power generation is stored in the energy storage module after voltage stabilization. The thermoelectric power generation layer is further connected to the energy supply switch circuit, and the energy supply switch circuit is connected to the energy storage module; the energy supply switch circuit switches the direction of the electric energy polarity provided to the thermoelectric power generation layer by the energy storage module according to the heat release direction of the thermoelectric power generation layer.

[0058] The energy storage module outputs electric energy through the positive and negative electrodes (401, 402) of the flexible energy collection device.

[0059] When the hot and cold ends of the thermoelectric power generation layer 10 are inverted, the positive and negative electrodes of the output will also be inverted at the same time, and the switch circuit in the energy management module 2 processes the polarity of the output voltage of the thermoelectric power generation layer 10. The voltage stabilization module stores the converted electric energy after performing voltage stabilization on the photovoltaic power generation layer 7 and the thermoelectric power generation layer 10, and provides stable electric energy for the wearable device.

[0060] The temperature sensors 5 are distributed at intervals on the inner side of the energy collection belt 1 of this embodiment, that is, the temperature sensors 5 are in close contact with the surface of the wearable carrier. The temperature sensor 5 transmits the sensor information back to the energy management module 2, and the energy management module 2 reads the temperature information of the temperature sensor 5 at intervals. When the temperature is abnormal, the energy management module 2 will control the internal circuit to turn off the power supply function of the thermoelectric power generation layer 10. At this time, the photovoltaic power generation layer 7 and the energy storage module of the energy management module 2 can supply power to the thermoelectric power generation layer 10. The thermoelectric power generation layer 10 uses the Peltier effect to generate heat energy at one end and absorb heat energy at the other end; when the internal circuit is reversely connected, the heat absorption at both ends of the thermoelectric power generation layer 10 will become heat release, and the heat release will also become heat absorption, thereby realizing the provision or release of heat energy for the human body or equipment.

[0061] See also Figure 8 When the device detects that the carrier temperature is lower than the lower threshold, the switch tube S1 ′ 、S3 ′ The energy management module transmits the stored electrical energy and / or processed photovoltaic power generation layer electrical energy to the temperature difference power generation layer, and the end close to the carrier releases heat by the Peltier effect, thereby providing thermal energy to the carrier. When the device detects that the carrier temperature is higher than the upper threshold, the switch tube S2 ′ 、S3 ′ When the power supply is turned on, the energy management module transmits the stored power and / or processed power of the photovoltaic power generation layer to the temperature difference power generation layer, and the end close to the carrier absorbs heat by the Peltier effect, thereby releasing heat energy to the carrier. Preferably, the switch tube uses a metal oxide semiconductor field effect tube (MOSFET).

[0062] The above specific embodiments only describe the design principle of the present invention. The shapes and names of the components in the description may be different and are not limited. Therefore, those skilled in the art in the field of the present invention may modify or replace the technical solutions recorded in the above embodiments; and these modifications and replacements do not deviate from the creative purpose and technical solutions of the present invention and should all fall within the protection scope of the present invention.

Claims

1. A photovoltaic-thermoelectric coupled flexible energy harvesting device, attached to a carrier; characterized in that: The flexible energy collection device is a flexible structure, integrating a light-collecting layer (6), a photovoltaic power generation layer (7), a temperature difference power generation layer (10), a heat-conducting layer, and an energy management module; the light-collecting layer is used to collect ambient light to the photovoltaic power generation layer; the heat-conducting layer is located between two layers of components requiring heat transfer and / or the energy collection device and the carrier; the photovoltaic power generation layer converts light energy into electrical energy and outputs it to the energy management module; The temperature difference power generation layer is arranged between the photovoltaic power generation layer and the carrier; When the temperature difference power generation layer works in mode 1, the temperature difference between the photovoltaic power generation layer and the carrier is used to generate electricity, and the electricity is output to the energy management module; When the thermoelectric power generation layer operates in mode 2, the energy management module and / or the photovoltaic power generation layer provides electrical energy, and the thermoelectric power generation layer generates heat energy or absorbs heat energy by using the Peltier effect to supplement or release heat energy for the carrier.

2. The flexible energy harvesting device according to claim 1, characterized in that: The innermost layer of the flexible energy collection device is provided with temperature sensors for monitoring the temperature; a switching module is provided in the energy management module, and when the monitored temperature is abnormal, the thermoelectric power generation function of the thermoelectric power generation layer is cut off; the photovoltaic power generation layer is directly connected to the thermoelectric power generation layer, and the photovoltaic power generation layer and the energy storage module of the energy management module supply power to the thermoelectric power generation layer, and the thermoelectric power generation layer generates or absorbs heat energy by using the Peltier effect.

3. The flexible energy harvesting device according to claim 1, characterized in that: The energy management module includes a switch module for converting the positive and negative voltages outputted by the alternation of the hot and cold ends of the temperature difference power generation layer into a positive voltage.

4. The flexible energy harvesting device according to claim 1, characterized in that: The light-collecting layer (6) is made of a flexible transparent material, and light-collecting convex points (13) are distributed and arranged on the surface. The diameter and thickness of the light-collecting convex points (13) are designed so that the photovoltaic power generation layer (7) is located at the focus of the light-collecting convex points (13).

5. The flexible energy collection device according to claim 4, characterized in that: The light-gathering layer (6) is made of silica gel material.

6. The flexible energy harvesting device according to claim 1, characterized in that: The temperature difference power generation layer includes a flexible packaging substrate, multiple pairs of N-type rigid thermoelectric semiconductors, and multiple pairs of P-type rigid thermoelectric semiconductors; the N-type rigid thermoelectric semiconductors and the P-type thermoelectric semiconductors are embedded in the flexible packaging substrate and connected through a conductive solution using screen printing technology.

7. The flexible energy collection device according to claim 6, characterized in that: The N-type rigid thermoelectric semiconductor and the P-type rigid thermoelectric semiconductor are connected in thermal parallel and electrical series; the connection structures are designed as serpentine structures.

8. The flexible energy harvesting device according to claim 1, characterized in that: The energy management module includes a first voltage stabilizing module of the photovoltaic power generation layer, a second voltage stabilizing module of the thermoelectric power generation layer, a power generation switch circuit, an energy supply switch circuit, and an energy storage module; The photovoltaic power generation layer is connected to the energy storage module through the first voltage stabilizing module, and the electric energy generated by the photovoltaic power generation is stored in the energy storage module after voltage stabilization; the first voltage stabilizing module is also connected to the thermoelectric power generation layer; when the flexible energy collection device works in mode 2, the first voltage stabilizing module directly provides the electric energy generated by the photovoltaic power generation layer to the thermoelectric power generation layer, or stores the electric energy generated by the photovoltaic power generation layer in the energy storage module, and the energy storage module uniformly supplies power to the thermoelectric power generation layer; The temperature difference power generation layer is connected to the power generation switch circuit, and the power generation switch circuit is connected to the energy storage module through the second voltage stabilizing module; the power generation switch circuit converts both the positive and negative voltages outputted by the alternation of the hot and cold ends of the temperature difference power generation layer into a positive voltage; The thermoelectric power generation layer is further connected to an energy supply switch circuit, which is connected to an energy storage module; the energy supply switch circuit switches the polarity of the electric energy provided by the energy storage module to the thermoelectric power generation layer according to the heat release direction of the thermoelectric power generation layer.

9. The flexible energy harvesting device according to claim 1, characterized in that: The heat conducting layer is arranged on two side surfaces of the temperature difference power generation layer (10).

10. The flexible energy harvesting device according to any one of claims 1 to 8, characterized in that: The flexible energy collection device adopts a strip structure with magnetic chucks at both ends of the strip structure; the positive and negative electrodes of the flexible energy collection device are exposed on one of the magnetic chucks; and the energy management module is arranged at one end of the strip structure.

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