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Charging circuit and charger using the same

A technology for charging circuits and chargers, applied to battery circuit devices, current collectors, circuit devices, etc., can solve problems such as uncontrollable charging current and energy loss, achieve good operability, improve efficiency, and avoid running torque Effect

Inactive Publication Date: 2005-02-09
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Although this portable manual charger has a simple structure and low cost, it does not solve the problem of energy loss caused by the output resistance of the generator
Also, it is not possible to control the charging current according to the amount of electricity generated

Method used

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  • Charging circuit and charger using the same
  • Charging circuit and charger using the same
  • Charging circuit and charger using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] Embodiments of the present invention will be described below with reference to the drawings. FIG. 4 is a block circuit diagram showing the structure of an embodiment of a charging circuit 100 according to the present invention. Moreover, FIG. 6 is a circuit diagram showing the configuration of a charger 200 using the charging circuit 100 .

[0042] As shown in FIG. 4 , the charging circuit 100 includes a generator 10 , a step-down circuit 11 , a current controller 12 and a secondary battery B. As shown in FIG.

[0043] The generator 10 has a rotating manual handle so that it generates voltage when this handle is turned. For example, use a three-phase brushless motor. The coils of this generator 10 have a Y connection or a delta (Δ) connection.

[0044] The step-down circuit 11 has a step-down DC-DC converter. In charging, this step-down circuit 11 receives the output of the generator 10 at a high voltage and a small current and charges the secondary battery B at a l...

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PUM

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Abstract

The invention discloses a charging circuit and a charger using the charging circuit, comprising a generator; a voltage reducing circuit, a current controller, a mode selector, and a monitor. The invention is characterized in that the voltage reducing circuit reduces the output voltage of the generator to predetermined voltage; the current controller controls the charging current supplied to a secondary battery by the voltage reducing circuit according to the electric quantity produced by the generator; the mode selector selects charging mode; the monitor monitoring the stored electric quantity; in the process of charging, the voltage reducing circuit receives the output of the generator by high voltage and small current, and charges the secondary battery by low voltage and high current.

Description

technical field [0001] The present invention relates to a charging circuit and a charger using the charging circuit, wherein the charging circuit uses electric energy output by a generator to effectively charge a secondary battery. More specifically, the present invention relates to a charging circuit and the like using a small human power generator. Background technique [0002] More recently, small human-powered generators have emerged that use electric motors to improve environmental awareness or to accommodate battery outages in mobile devices. Chargers are commercially available as incorporation into radios or for charging cellular phones. [0003] Such a charger is generally used in the charging circuit shown in FIG. 1 for charging. In FIG. 1, reference numeral 10 denotes a generator. In the generator, R represents the internal resistance (output resistance) of the generator 10, r represents a current limiting resistor, D represents a backflow prevention diode, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/14H02J7/00H02P9/00H02P9/48
CPCH02P9/48Y02T10/92H02J7/1492
Inventor 管野正喜森浩之山田心一郎野口勉
Owner SONY CORP
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