US 11,901,761 B2Granted

Charging device

AssigneeFdk Corporation

InventorsMasatsuru Miyazaki, Norio Fukui

Life of this patent

Estimating the term…

Loading patent…

Abstract

A charging device includes a rectifier circuit which rectifies AC power output by an AC power supply, a DC-DC converter which converts a voltage of DC power output by the rectifier circuit, a charging circuit which includes a positive electrode contact point in contact with a positive electrode terminal of a mounted secondary battery and a first negative electrode contact point and a second negative electrode contact point in contact with a negative electrode terminal of the secondary battery, an output voltage from the DC-DC converter being applied between the positive electrode contact point and the first negative electrode contact point, and a control circuit which includes a photocoupler that is turned on by a difference in potential between the positive electrode contact point and the second negative electrode contact point and outputs an enable signal for the DC-DC converter when the photocoupler is on.

Claims5

Dependent claims

A charging device comprising:

a rectifier circuit which rectifies AC power output by an AC power supply;
a DC-DC converter which converts a voltage of DC power output by the rectifier circuit;
a charging circuit which includes a receptacle having a power supply terminal connected to a positive electrode terminal of a secondary battery in an electronic device via a power supply line of a cable and a ground terminal connected to a negative electrode terminal of the secondary battery via a ground line of the cable, a housing of the receptacle being connected to a ground of the electronic device via a shield of the cable, an output voltage from the DC-DC converter being applied between the power supply terminal of the receptacle and the ground terminal of the receptacle;
and
a control circuit which includes a switch circuit that is turned on by a difference in potential between the power supply terminal of the receptacle and the housing of the receptacle and outputs an enable signal for the DC-DC converter when the switch circuit is on.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/445,482Filed 19 Aug 2021 · division
Priority: JP 2017-06118727 Mar 2017
Published: US 2021/0384755 A19 Dec 2021
Granted: 13 Feb 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

H02J 7/02
Circuit arrangements for charging or discharging batteries or for supplying loads from batteries: for charging batteries from AC mains by converters
H01M 10/44
Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells: methods for charging or discharging
H02J 7/06
Regulation of charging current or voltage: using discharge tubes or semiconductor devices
H02J 7/50
Circuit arrangements for charging or discharging batteries or for supplying loads from batteries: acting upon multiple batteries simultaneously or…

Family

PCT/JP2018/003260Parent of this division · filed 31 Jan 2018
US 2021/0384755 A1Pre-grant publication · published 9 Dec 2021
Application16/498,382Parent of this division
US 11,228,198 B2Parent of this division
US 2020/0036211 A1Published application
US 11,901,761 B2This patent

From the US filing history. Foreign family members aren’t listed.