US 2016/0079895 A1Published application

Electric power tool

AssigneePanasonic Intellectual Property Management Co., Ltd.

InventorsTatsuya MIWA, Masaki IKEDA, Naoki TSURUTA

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Abstract

An electric power tool includes a drive source, a rechargeable battery that supplies power to the drive source, a voltage meter that measures voltage of the rechargeable battery, a temperature meter that measures temperature of the rechargeable battery, and a drive control unit that regulates the power supplied to the drive source from the rechargeable battery to drive the drive source. If the battery temperature measured by the temperature meter is lower than or equal to a predetermined temperature when the battery voltage measured by the voltage meter is lower than or equal to a predetermined voltage, the drive control unit drives the drive source differently from normal driving that is performed if the battery temperature is higher than the predetermined temperature when the battery voltage is higher than the predetermined voltage.

Claims3

Dependent claims

An electric power tool comprising:

a drive source;
a rechargeable battery that supplies power to the drive source;
a voltage meter that measures a battery voltage of the rechargeable battery;
a temperature meter that measures a battery temperature of the rechargeable battery;
and
a drive control unit that regulates the power supplied to the drive source from the rechargeable battery to drive and control the drive source;
wherein the drive control unit is configured such that if the battery temperature measured by the temperature meter is lower than or equal to a predetermined temperature when the battery voltage measured by the voltage meter is lower than or equal to a predetermined voltage, the drive control unit drives and controls the drive source differently from normal driving that is performed if the battery temperature is higher than the predetermined temperature when the battery voltage is higher than the predetermined voltage.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/631,935Filed 26 Feb 2015
Priority: JP 2014-18647112 Sep 2014
Published: 17 Mar 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H02P 7/28
Using discharge tubes or semiconductor devices: using semiconductor devices
B25F 5/00
Details or components of portable power-driven tools not particularly related to the
H02K 7/145
Structural association with mechanical loads, e.g. with hand-held machine tools or fans: hand-held machine tool
H02P
Control or regulation of electric motors, electric generators or dynamo-electric converters