WIRELESS CHARGER EQUIPPED WITH AUXILIARY POWER SUPPLY AND AUXILIARY POWER DEVICE

• US 20150028800A1
• Filed: 01/07/2014
• Published: 01/29/2015
• Est. Priority Date: 07/24/2013
• Status: Active Grant

• Current Assignee: Nera Innovations Limited (Atlantic IP Services Limited)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: KIM, Sang Beom
• Granted Patent: US 9,490,652 B2
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: H02J 2207/40 adapted for charging from various sources, e.g. AC, DC or multivoltage
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence
• CPC Class Codes: H02J 7/342 The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging with circuits for polarity protection H02J7/0034

Abstract

A wireless charger equipped with an auxiliary power supply includes a power input unit which is connected to an external power supply, a wireless power transmission unit which wirelessly transmits electrical power to an electronic device through a magnetic field, and an auxiliary power unit which charges a battery provided therein with electrical power supplied from the power input unit, or charges the battery and, at the same time, provides the electrical power to the wireless power transmission unit, and provides the electrical power of the battery provided therein to the wireless power transmission unit when the power supply from the power input unit is stopped.

Claims

1. A wireless charger including an auxiliary power supply, the wireless charger comprising:

a power input unit which is connected to an external power supply;

a wireless power transmission unit which wirelessly transmits electrical power to an electronic device through a magnetic field; and

an auxiliary power unit which charges a battery provided therein with electrical power supplied from the power input unit, or charges the battery and, at the same time, provides the electrical power to the wireless power transmission unit, and provides the electrical power of the battery provided therein to the wireless power transmission unit when the power supply from the power input unit is stopped.

2. The wireless charger of claim 1, wherein the auxiliary power unit comprises:

the battery;

a charge/discharge module which charges the battery with the electrical power supplied from the power input unit and outputs the electrical power stored in the battery when the power supply from the power input unit is stopped; and

a boost converter which boosts the voltage of the electrical power output from the charge/discharge module and provides the boosted voltage to the wireless power transmission unit.

3. The wireless charger of claim 1, further comprising a wired output unit which is connected in parallel to the wireless power transmission unit.

4. A wireless charger including an auxiliary power supply, the wireless charger comprising:

a first power input unit;

a second power input unit;

a wireless power transmission unit which converts electrical power, supplied from the first power input unit or the second power input unit, into a magnetic field and charges an electronic device; and

an auxiliary power unit which includes an input terminal, an output terminal, and a battery, the input terminal being connected to the first power input unit and the second power input unit,

wherein the auxiliary power unit charges the battery with electrical power supplied from the first power input unit or the second power input unit to the input terminal, or charges the battery and, at the same time, provides the electrical power to the wireless power transmission unit through the output terminal, and provides the electrical power stored in the battery to the wireless power transmission unit through the output terminal when the electrical power supplied from the first power input unit and the second power input unit to the input terminal is cut off.

5. The wireless charger of claim 4, wherein the auxiliary power unit further includes:

a charge/discharge module which charges the battery with the electrical power supplied from the first power input unit or the second power input unit to the input terminal and generates electrical power by discharging the battery when the electrical power supplied from the first power input unit and the second power input unit is cut off; and

a boost converter which boosts the voltage of the electrical power generated by the charge/discharge module and provides the boosted voltage to the output terminal.

6. The wireless charger of claim 4, further comprising a wired output unit which is connected in parallel to the wireless power transmission unit.

7. The wireless charger of claim 4, further comprising a connector which electrically connects the first power input unit, the second power input unit, and the input terminal and electrically connects the output terminal and the wireless power transmission unit, wherein the second power input unit, the input terminal, and the output terminal are detachably connected to the connector.

8. The wireless charger of claim 4, further comprising a switch which opens and closes the electrical connection between the first power input unit and the wireless power transmission unit.

9. An auxiliary power device which is detachably connected to a wireless charger which includes a first power input unit, a wireless power transmission unit, and a connector, the auxiliary power device comprising:

a second power input unit; and

an auxiliary power unit which includes an input terminal, an output terminal, and a battery, the input terminal being connected to the first power input unit or the second power input unit,

wherein the auxiliary power unit charges the battery with electrical power supplied from the first power input unit or the second power input unit to the input terminal, or charges the battery and, at the same time, provides the electrical power to the wireless power transmission unit through the output terminal, and provides the electrical power stored in the battery to the wireless power transmission unit through the output terminal when the electrical power supplied from the first power input unit and the second power input unit to the input terminal is cut off.

10. The auxiliary power device of claim 9, further comprising a wired output unit which is connected to the output terminal of the auxiliary power unit.