Power Tool and Battery Pack for Use Therein
First Claim
Patent Images
1. A power tool comprising:
- a connection portion to which a battery pack containing a secondary battery is attachable, the secondary battery being characterized by a battery property and a battery status;
a motor supplied with power from the secondary battery;
a property/status detector that is configured to detect the battery property and the battery status; and
a controller that is configured to control a current flowing in the motor based on the battery property and the battery status detected by the property/status detector.
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Abstract
To prevent or suppress a secondary battery used in a power tool from being deteriorated, a battery property, such as internal resistance of the battery, and a battery status of the secondary battery, such as a voltage developed across the battery, are detected. Based on the battery property and the battery status as detected, a current flowing in the motor of the power tool is controlled.
20 Citations
12 Claims
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1. A power tool comprising:
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a connection portion to which a battery pack containing a secondary battery is attachable, the secondary battery being characterized by a battery property and a battery status; a motor supplied with power from the secondary battery; a property/status detector that is configured to detect the battery property and the battery status; and a controller that is configured to control a current flowing in the motor based on the battery property and the battery status detected by the property/status detector. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A battery pack for a power tool having a motor, the battery pack comprising:
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a secondary battery used as a power source of the motor, the secondary battery being characterized by a battery property and a battery status; a property/status detector that is configured to detect the patter property and the battery status; and a controller that is configured to control a current flowing in the motor based on the battery property and the battery status detected by the property/status detector. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification