A system and method for micro-energy harvesting using on-chip photovoltaic cells
A photovoltaic cell and collection system technology, which is applied in photovoltaic power generation, electric variable adjustment, control/regulation systems, etc., can solve the problems of low energy collection efficiency of the system, incapable of loading equipment to provide high efficiency and stability, and unstable output voltage, etc., to achieve energy High collection efficiency, reduced cross-step leakage current, and the effect of reducing leakage current
Active Publication Date: 2021-10-15
HEFEI UNIV OF TECH
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[0005] The technical problem to be solved by the present invention lies in the energy collection system and method of the prior art, the energy collection efficiency of the system is low, the output voltage is not stable, and it is impossible to provide efficient and stable power supply voltage for the load equipment, and the problem of low practicability
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[0051] Such as figure 1 As shown, a micro-energy harvesting system using on-chip photovoltaic cells includes an on-chip photovoltaic cell equivalent module 1, a continuous MPPT module 2, an auxiliary boost converter module 3, a control signal generation module 4, a main boost converter module 5 and The voltage regulation module 6, the on-chip photovoltaic cell equivalent module 1 is respectively connected with the continuous MPPT module 2, the auxiliary boost converter module 3 and the main boost converter module 5, the continuous MPPT module 2, the auxiliary boost converter module 3 , the control signal generation module 4 , the main boost converter module 5 and the voltage regulation module 6 are connected in sequence. On-chip photovoltaic cell equivalent module 1 generates photovoltaic voltage V under ambient light conditions PD , input to the continuous MPPT module 2 to generate the bias voltage V BIAS ; With photovoltaic voltage V PD is the supply voltage, according to...
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The invention discloses a micro-energy collection system and method using on-chip photovoltaic cells, including an on-chip photovoltaic cell equivalent module, a continuous MPPT module, an auxiliary boost converter module, a control signal generation module, a main boost converter module and a voltage regulator module, the on-chip photovoltaic cell equivalent module is respectively connected with the continuous MPPT module, the auxiliary boost converter module and the main boost converter module, the continuous MPPT module, the auxiliary boost converter module, the control signal generation module, the main boost converter module The converter module and the voltage regulation module are connected in sequence; the invention has the advantages of high energy collection efficiency of the system, stable output voltage, high efficiency and stable power supply voltage for load equipment, and high practicability.
Description
technical field [0001] The invention relates to the field of power management chips, and more particularly relates to a micro-energy collection system and method using on-chip photovoltaic cells. Background technique [0002] The traditional light energy collection structure is basically a combination of an independent photovoltaic cell and a CMOS chip with a power management unit. However, for implantable devices, a single photovoltaic cell has a large area and high cost compared to a chip. Therefore, research has been conducted by integrating photovoltaic cells and CMOS circuits on the same silicon substrate to save area, reduce costs and improve photovoltaic performance. cell efficiency, but this approach also leads to several other problems with photovoltaic micro-energy harvesting circuits. First, for an on-chip photovoltaic cell, its output power may be as low as a few nanowatts, which makes it difficult for the system to work properly without an external control sign...
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IPC IPC(8): G05F1/67H02M3/07
CPCG05F1/67H02M3/07Y02E10/56
Inventor 程心张云峰张章张永强
Owner HEFEI UNIV OF TECH