Cordless power tool
A cordless power tool such as a power staple gun includes a power supply circuit of an electric double layer capacitor and a lithium-ion battery . In a standby state, the lithium-ion battery charges the electric double layer capacitor, and at a switch on time, the electric double layer capacitor sup...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A cordless power tool such as a power staple gun includes a power supply circuit of an electric double layer capacitor and a lithium-ion battery . In a standby state, the lithium-ion battery charges the electric double layer capacitor, and at a switch on time, the electric double layer capacitor supplies large current to the motor . By combining the lithium-ion battery with high energy density and the electric double layer capacitor capable of discharging large current, it is possible to greatly reduce the size and weight as compared with a case where a nickel-cadmium battery or a nickel-hydrogen battery is used. Besides, since the electric double layer capacitor has a very long lifetime, the running cost can also be reduced. |
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