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Photovoltaic battery- DC / DC voltage boosting convert charging method

A photovoltaic cell and boost conversion technology, applied in photovoltaic power generation, battery circuit devices, current collectors, etc., can solve problems such as large changes in light intensity and unstable output voltage of solar cells, and achieve large input range and self-adaptive capabilities Strong, low current conversion efficiency high effect

Inactive Publication Date: 2008-09-03
BEIJING HI TECH WEALTH INVESTMENT DEV
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AI Technical Summary

Problems solved by technology

In terms of photovoltaic cells used as charging sources for portable devices, the intensity of light may vary greatly, and the output voltage of solar cells will also become unstable. In this case, the traditional method can only be charged under strong light.

Method used

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  • Photovoltaic battery- DC / DC voltage boosting convert charging method
  • Photovoltaic battery- DC / DC voltage boosting convert charging method
  • Photovoltaic battery- DC / DC voltage boosting convert charging method

Examples

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Embodiment Construction

[0023] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] The device for charging a portable device described in this embodiment includes: a photovoltaic cell, a DC / DC boost converter, a voltage compensation circuit, a voltage sensor and a battery for a portable device, such as figure 1 shown.

[0025] A photovoltaic cell (also known as a "photovoltaic cell") consists of N (N≥1) photovoltaic cells. In this embodiment, nine large-area photovoltaic cells are connected in series, such as figure 2 As shown, the standard 1 light intensity should output 4.5V.

[0026] The DC / DC boost conversion circuit is composed of a high-efficiency DC / DC boost converter and additional circuits, and the output is a regulated voltage. This example uses Torex's high-efficiency charge pump (charge pump) boost converter XC9802B463DR, the input voltage ranges from 2.3V to 4.5V, and the output voltage is 4.6V, such ...

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Abstract

The invention relates to a photovoltaic cell -DC / DC boost conversion charge method which belongs to battery technique field. The method includes: 1) a portable equipment accumulator voltage is detected by a voltage sensor, when lows to full charge capacity, the voltage sensor makes DC / DC boost converter starting DC / DC conversion, and electricity quantity flows from photovoltaic current to lithium battery for charging; 2) when the portable equipment accumulator is in full charge capacity state, accumulator need not charge again, the voltage sensor makes DC / DC boost converter forbidding DC / DC conversion, thereby, the portable equipment accumulator is protected and over charge phenomena is prevented. The method can be realized simply, and has short reaction time, high efficiency, overvoltage protection and anti-counterblast protection.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a photovoltaic battery-DC / DC step-up conversion charging method. The photovoltaic battery is charged through a high-efficiency DC / DC converter to provide power to portable devices under various light intensity environments. Background technique [0002] In the current application of solar cells, solar cells are mainly composed of multiple solar cells connected in series. The principle of power generation of solar cells is that the solar cells (pn junction) react to generate current through light. In terms of photovoltaic cells used as charging sources for portable devices, the intensity of light may vary greatly, and the output voltage of solar cells will also become unstable. In this case, the traditional method can only be charged under strong light. . [0003] To solve the above problems, an effective method is to ensure a stable voltage output through a high-ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/35H02J7/04
CPCY02E10/566Y02E10/56
Inventor 张征宇詹昌寿
Owner BEIJING HI TECH WEALTH INVESTMENT DEV
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