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Method and apparatus of charge using photovoltaic battery

A photovoltaic cell and photovoltaic technology, applied in battery circuit devices, photovoltaic power generation, circuit devices, etc., can solve the problems of inability to charge, open-circuit voltage cannot reach the nominal voltage of the battery, and low conversion efficiency

Inactive Publication Date: 2008-06-25
BEIJING HI TECH WEALTH INVESTMENT DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] To sum up, there is a problem with the previous method of connecting solar cells in series and in parallel: when connecting in series, although the open circuit voltage of the solar cell is increased, the current capacity generated by the solar cell is not strong, so a large part of the energy consumed by the solar cell is in the Inside the solar cell, the conversion efficiency is not high; when connected in parallel, although the short-circuit current of the solar cell is improved, its open-circuit voltage is far from the nominal voltage of the battery, and charging cannot be realized.

Method used

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  • Method and apparatus of charge using photovoltaic battery

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Embodiment Construction

[0021] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] refer to figure 1 , which includes: a photovoltaic cell, a DC / DC conversion circuit, a voltage compensation circuit, a voltage sensor, and a battery for portable equipment. Among them, the photovoltaic cell (hereinafter referred to as "photovoltaic cell") is composed of N (N≥9) photovoltaic cells. The DC / DC step-down conversion circuit is composed of a high-efficiency DC / DC conversion circuit and additional circuits, and the output is a regulated voltage. The battery for portable equipment (hereinafter referred to as "battery") is used to store the energy converted by the DC / DC step-down of the photovoltaic cell, and is used as an energy supply source for portable equipment. Voltage compensation circuit, this voltage is mainly used to compensate the output voltage of the DC / DC step-down conversion circuit, because the DC / DC step-down ...

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Abstract

The invention provides a method and a device which use the photovoltaic battery to charge. The device comprises a photovoltaic battery that consists of N photovoltaic electric cores, wherein, N is equal to or more than nine; and a DC / DC conversion circuit that is composed of a DC / DC converter and an additional circuit and is used for storing the energy converted from the photovoltaic battery via the DC / DC conversion circuit and for providing the energy to portable equipment. The invention is easy to be realized, has strong self-adaptive capacity and high conversion efficiency, and can effectively protect the overcharge of the battery.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a method and device for stabilizing and charging a photovoltaic battery through a high-efficiency DC / DC converter. Background technique [0002] In the existing charging technology, the capacity of the storage battery of a portable device is generally expressed in milliampere hours (mAh). If the storage battery is 700mAh, it means that the storage battery can be continuously discharged at a discharge rate of 700mA for one hour. When the battery is charged, the charged electricity is the integral of the current flowing into the battery and the time. Therefore, when charging, the greater the current flowing into the battery, the higher the charging efficiency. [0003] The energy conversion efficiency of existing solar cells is not high, and in small-area applications, the current available per unit time is also very small, so there is no need to limit current and vo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J7/35H02J7/04
CPCY02E10/566Y02E10/56
Inventor 张征宇詹昌寿
Owner BEIJING HI TECH WEALTH INVESTMENT DEV
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