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Energy harvesting systems and self-powered wearable devices

A technology of energy collection and energy, which is applied in current collectors, transportation and packaging, electric vehicles, etc., can solve the problems of unstable output voltage and current, high requirements for working environment, high voltage, etc., to ensure stability, simple manufacturing process, Effect of reducing internal resistance

Active Publication Date: 2021-01-05
INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current generators generally have problems such as low power, high requirements for the working environment, unstable output voltage and current, and high voltage.

Method used

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  • Energy harvesting systems and self-powered wearable devices
  • Energy harvesting systems and self-powered wearable devices
  • Energy harvesting systems and self-powered wearable devices

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0041] In a first exemplary embodiment of the present disclosure, an energy harvesting system is provided.

[0042] figure 1 It is a schematic structural diagram of an energy harvesting system according to an embodiment of the present disclosure. figure 2 It is a schematic structural diagram of an energy harvesting system applied to an electret generator set according to an embodiment of the present disclosure.

[0043] In this example, refer to figure 1 As shown, the energy harvesting system includes: n independent unit structures, n is a positive integer, each independent unit structure includes: a power generation system and a rectification system, wherein the power generation system includes a micro generator 102, which is used to move the human body The generated mechanical energy is converted into electrical energy; the rectification system includes a rectification circuit 101, the AC input end of the rectification circuit is connected to the output end of the micro-g...

no. 2 example

[0059] In a second exemplary embodiment of the present disclosure, an energy harvesting system is provided.

[0060] image 3 It is a schematic structural diagram of an energy harvesting system applied to a piezoelectric generator according to an embodiment of the present disclosure.

[0061] refer to image 3 As shown, the difference between this embodiment and the energy harvesting system of the first embodiment is that the micro generator in this embodiment is a piezoelectric generator, the energy harvesting system does not contain an electron source, and the piezoelectric The two output terminals of the generator are respectively connected with the two AC input terminals of the rectification circuit. In addition, an illustration of the specific form of the load is also given. In this example, refer to image 3 As shown, the load 105 is an energy storage element, such as a capacitor 115, and a diode 125 is connected in series across the capacitor to prevent current leak...

no. 3 example

[0063] In a third exemplary embodiment of the present disclosure, an energy harvesting system is provided, and the energy harvesting system is an electret power generation lighting system based on RC oscillation.

[0064] Figure 4 It is a schematic structural diagram of an electret power generation lighting system based on RC oscillation according to an embodiment of the present disclosure.

[0065] refer to Figure 4As shown, compared with the energy harvesting system of the first embodiment, the load in this embodiment has been specifically set. In this embodiment, the load is an adjustable resistor 135 and an LED array 145, which can be The adjustable resistor 135 and the LED array 145 including n LED indicator lights are connected in series in the circuit, n≥2, by adjusting the resistance value of the adjustable resistor 135, the LED array 145 can enter a continuous flashing state, and the flashing frequency is greater than 25Hz, Can be used for steady lighting needs. ...

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Abstract

The invention provides an energy collection system and a self-energy-supply wearable device. The energy collection system comprises n independent unit structures, wherein n is a positive integer; eachindependent unit structure includes a generation system and a rectification system, the generation system comprises a micro generator used for converting mechanical energy generated by movement of ahuman body to electric energy, the rectification system comprises a rectification circuit, an AC input terminal of the rectification circuit is connected with an output terminal of the micro generator, and the rectification circuit is used for converting the form of the electric energy of the micro generator to DC pulse from AC pulse, wherein output circuits of the n independent unit structures are provided with voltage reduction devices; and each voltage reduction device is a spark gap or a discharging tube to mutually isolate the generation system and the rectification system and control theoutput voltage and current of the output circuits. The output voltage can be reduced, the output current can be increased, the pulse width of the output current is effectively improved, the effect ofpulse width modulation is achieved, the stability of the output voltage is guaranteed, and the system and the device are more applicable to device power supply or energy collection.

Description

technical field [0001] The disclosure belongs to the technical field of new energy and ergonomics, and relates to an energy harvesting system and a self-powered wearable device. Background technique [0002] Today, when lithium battery power supply has become the mainstream energy supply method for portable mobile appliances, the dependence of traditional batteries on the charging environment has undoubtedly become a major limitation. In addition, discarded batteries will also bring harm to the environment. Human body movement can generate a large amount of energy. Many human movements, such as walking, dancing, dressing, etc., are all related to the transformation of energy. The continuous power of ordinary people is about 70W under normal circumstances. Well-trained athletes, armed police, The instantaneous burst power of public security, soldiers, bodyguards, etc. can reach up to 3kW. In more strenuous exercise, such as playing basketball, the power consumed by a person ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/32H02J7/34
Inventor 王盛凯姚沛林
Owner INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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