Power supply device and electric apparatus

Patent metadata

Field	Value
Publication number	US-9620962-B2
Application number	US-201314135807-A
Country	US
Kind code	B2
Filing date	Dec 20, 2013
Priority date	Dec 28, 2012
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

A power supply device is connected to an external power supply and supplies electric power to a load. The power supply device includes a battery terminal that is used to connect a secondary battery, a superposition unit that superposes second electric power output from the secondary battery on first electric power supplied from the external power supply, and that outputs resultant electric power to the load; a power consumption amount retrieve unit that retrieves a power consumption amount of the load; and a controller that controls an amount of the second electric power to be output from the secondary battery, based on the power consumption amount.

First claim

What is claimed is:

1. A power supply device configured to be connected to an external power supply and configured to supply electric power to a load, the power supply device comprising:
a battery terminal configured to connect to a secondary battery;
a superposition unit configured to superpose second electric power output from the secondary battery on first electric power supplied from the external power supply, and to output resultant electric power, including (i) the second electric power output from the secondary battery superposed on (ii) the first electric power supplied from the external power supply, to the load;
a power consumption amount retrieve unit including a communication unit to receive an expected power consumption amount from the load; and
a controller configured to control an amount of the second electric power to be output from the secondary battery, based on the power consumption amount received by the communication unit, the controller determining whether the power consumption amount can be supplied to the load, and the communication unit transmitting a determination result, by the controller, of whether the power consumption amount can be supplied to the load,
wherein the controller provides a control output to the superposition unit to cause the superposition unit to (i) superpose second electric power output from the secondary battery on first electric ewer su lied from the external power supply and output the resultant electric power to the load, and (ii) when an amount of power consumed by the load increases, increase the amount of power supplied from the superposition unit to the load.

2. The power supply device according to claim 1 ,
wherein, when the power consumption amount is greater than a predetermined amount of electric power, the controller causes the secondary battery to output the second electric power.

3. The power supply device according to claim 2 ,
wherein the controller causes the secondary battery to output a difference between the power consumption amount and the predetermined amount of the electric power.

4. The power supply device according to claim 1 ,
wherein the power consumption amount retrieve unit is a power sensor configured to measure the resultant electric power, the resultant electric power being output from the superposition unit to the load, and
wherein the controller is configured to control the amount of the second electric power to be output from the secondary battery, based on a value measured by the power sensor.

5. The power supply device according to claim 1 , further comprising:
a current limiting unit configured to limit a current flowing from the external power supply to the superposition unit.

6. The power supply device according to claim 1 , further comprising:
a display unit configured to display a residual electric energy amount of the secondary battery.

7. The power supply device according to claim 1 ,
wherein the secondary battery is detachably attached to the battery terminal of the power supply device as an external battery.

8. An electric apparatus comprising:
a load; and
a power supply device configured to be connected to an external power supply and configured to supply electric power to the load,
wherein the power supply device includes
a battery terminal configured to connect a secondary battery;
a superposition unit configured to superpose second electric power output from the secondary battery on first electric power supplied from the external power supply, and to output resultant electric power, including (i) the second electric power output from the secondary battery superposed on (ii) the first electric power supplied from the external power supply, to the load;
a power consumption amount retrieve unit including a communication unit to receive an expected power consumption amount from the load; and
a controller configured to control an amount of the second electric power to be output from the secondary battery, based on the power consumption amount received by the communication unit, the controller determining whether the power consumption amount can be supplied to the load, and the communication unit transmitting a determination result, by the controller, of whether the power consumption amount can be supplied to the load,
wherein the controller provides a control output to the superposition unit to cause the superposition unit to (i) superpose second electric power output from the secondary battery on first electric power supplied from the external power supply and output the resultant electric power to the load, and (ii) when an amount of power consumed by the load increases, increase the amount of power supplied from the superposition unit to the load.

9. The electric apparatus according to claim 8 ,
wherein the secondary battery is detachably attached to the terminal of the power supply device as a batter outside the electric apparatus.

Assignees

• Yoshida Masaaki
• Takai Masami
• Ricoh Co Ltd

Inventors

• Yoshida Masaaki
• Takai Masami

Classifications

• H02J3/32 Primary

  using batteries or super capacitors with converting means · CPC title

• Y10T307/587

  Cross-Sectional Technologies · mapped topic

• H02J3/46 Primary

  Controlling the sharing of generated power between the generators, sources or networks · CPC title