BATTERY CHARGER

• US 20100013432A1
• Filed: 07/16/2009
• Published: 01/21/2010
• Est. Priority Date: 07/17/2008
• Status: Abandoned Application

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Yamashita, Takahiro, Yoshida, Mamoru, Nakasho, Toshiki, Yagi, Tatehito, TOYA, Shoichi
• Application Number:
  US12/504,025
• Publication Number:
  US 20100013432A1
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: H01M 10/46 Accumulators structurally combined with charging apparatus circuits for charging H02J7/00
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence
• CPC Class Codes: H02J 7/0071 with a programmable schedule
• CPC Class Codes: H02J 7/00714 in response to battery charging or discharging current
• CPC Class Codes: H02J 7/007182 in response to battery voltage
• CPC Class Codes: H02J 7/007192 in response to temperature
• CPC Class Codes: H02J 7/007194 of the battery
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A battery charger 100 that charges a battery 40 is provided with a power supply circuit 12 to supply power to charge the battery, a control section 13 to control the power supply circuit 12, and an output terminal 19 connected to the input-side of the power supply circuit 12 via an input switch 18. When the battery 40 becomes fully-charged, the control section 13 controls the power supply circuit 12 OFF and the input switch ON to output the input power from the output terminal 19.

Claims

1. A battery charger for charging a battery comprising:

a power supply circuit to supply charging power;

a control section to control the power supply circuit; and

an output terminal connected to the input-side of the power supply circuit via an input switch;

wherein when the battery becomes fully-charged, the control section controls the power supply circuit OFF and switches the input switch ON to redirect the input power out the output terminal.

2. The battery charger as cited in claim 1 wherein a power source connector is provided that connects with an AC adapter that converts commercial power to DC.

3. The battery charger as cited in claim 1 wherein the power supply circuit supplies power to charge the battery by a non-contact charging technique.

4. The battery charger as cited in claim 3 wherein the power supply circuit is provided with a transmitting coil that sends power to charge the battery.

5. The battery charger as cited in claim 2 wherein the power supply circuit is provided with a transmitting coil that sends power to charge the battery;

and power input from the power source connector is converted to AC power and sent by the transmitting coil to charge the battery.

6. The battery charger as cited in claim 1 wherein a mounting section is provided where a battery device housing a battery can be set in a detachable fashion.

7. The battery charger as cited in claim 6 wherein the power supply circuit is provided with a transmitting coil that sends power to charge the battery;

and the control section stops power transmission by the transmitting coil when a battery device charging error is detected.

8. The battery charger as cited in claim 6 wherein the control section stops power output when full-charge of a battery of a battery device set in the mounting section is detected.

9. The battery charger as cited in claim 4 wherein a current detection circuit is provided to detect current supplied to the power supply circuit;

and the control section stops the supply of AC power to the transmitting coil when abnormal data is detected from the current detection circuit.

10. The battery charger as cited in claim 8 wherein a mounting section is provided where a battery device housing a battery can be set in a detachable fashion;

the current detection circuit is a data receiving circuit that receives data transmitted from a battery device set in the mounting section; and

the control section controls the power supply circuit according to data from the data receiving circuit, which is the current detection circuit.

11. The battery charger as cited in claim 6 wherein a Hall-effect IC is provided to detect a battery device set in the mounting section, and placement of the battery device in a specified position is detected by the Hall-effect IC.

12. The battery charger as cited in claim 11 wherein the control section controls the power supply circuit via signals from the Hall-effect IC.