POWER SUPPLY DEVICE, INVERTER DEVICE, POWER TOOL

• US 20130285476A1
• Filed: 01/16/2012
• Published: 10/31/2013
• Est. Priority Date: 01/14/2011
• Status: Abandoned Application

• Current Assignee: Hitachi KOKI Company Limited (Koki Holdings Co., Ltd.)
• Original Assignee: Hitachi KOKI Company Limited (Koki Holdings Co., Ltd.)
• Inventors: Nakano, Yasushi, Funabashi, Kazuhiko, Kawano, Yoshikazu, Watanabe, Shinji, Onose, Miyoji, Fujisawa, Haruhisa
• Application Number:
  US13/978,572
• Publication Number:
  US 20130285476A1
• Time in Patent Office: Days
• US Class Current: 307/150
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 7/0063 with circuits adapted for supplying loads from the battery
• CPC Class Codes: H02J 7/00712 the cycle being controlled or terminated in response to electric parameters
• CPC Class Codes: H02M 7/44 by static converters

Abstract

A power supply device includes: a battery pack; a transforming unit configured to transform a DC voltage supplied from the battery pack; and a control unit configured to determine, based on a characteristic of the battery pack, whether or not the converting unit performs an outputting operation.

Claims

1. A power supply device comprising:

a battery pack;

a transforming unit configured to transform a DC voltage supplied from the battery pack; and

a control unit configured to determine, based on a characteristic of the battery pack, whether or not the converting unit performs an outputting operation.

2. The power supply device according to claim 1, wherein the control unit prevents the converting unit from performing the outputting operation when the characteristic of the battery back is not adapted to the power supply device.

3. The power supply device according to claim 1, wherein the transforming unit comprises a booster configured to boost the DC voltage supplied from the battery pack, and wherein the control unit prevents the booster from performing a boosting operation when the characteristic of the battery back is not adapted to the power supply device.

4. The power supply device according to claim 3, wherein the transforming unit further comprises:

a rectifying/smoothing circuit configured to rectifies/smoothes a voltage outputted from the booster; and

an inverter circuit configured to convert a voltage outputted from the rectifying/smoothing circuit into an AC voltage,

wherein the control unit prevents at least one of the booster from performing the boosting operation and the inverter circuit from performing a converting operation when the characteristic of the battery back is not adapted to the power supply device.

5. The power supply device according to claim 3, wherein the control unit prevents the booster from performing the boosting operation based on a rating capacity of the battery pack.

6. The power supply device according to claim 3, wherein the control unit prevents the booster from performing the boosting operation based on a rated voltage of the battery pack.

12. A power tool comprising:

the power supply device according to any one of claims 1-6; and

an AC motor driven with the second AC power.

7. An inverter device comprising:

a converting unit configured to convert a first DC power supplied from a battery pack into a first AC power and output the first AC power;

a rectifying/smoothing circuit configured to convert the first AC power into a second DC power and output the second DC power;

an inverter circuit configured to convert the second DC power into a second AC power and output the second AC power; and

a control unit configured to prevent at least one of the converting unit from outputting the first AC power and the inverter circuit from outputting the second AC power based on a characteristic of the battery pack.

8. The inverter device according to claim 7, wherein the control unit prevents at least one of the converting unit from outputting the first AC power and the inverter circuit from outputting the second AC power based on a rating capacity of the battery pack.

9. The inverter device according to claim 7, wherein the battery back includes at least one battery cell, and the control unit prevents at least one of the converting unit from outputting the first AC power and the inverter circuit from outputting the second AC power based on a parallel number of the battery cell.

10. The inverter device according to claim 7, wherein the control unit prevents at least one of the converting unit from outputting the first AC power and the inverter circuit from outputting the second AC power based on a rated voltage of the battery pack.

11. The inverter device according to claim 7, wherein the battery back includes at least one battery cell, and the control unit prevents at least one of the converting unit from outputting the first AC power and the inverter circuit from outputting the second AC power based on a type of the battery cell.

13. A power tool comprising:

the inverter device according to any one of claims 7-11; and

an AC motor driven with the second AC power.