摘要:
A battery charger for charging a lithium-ion battery includes a temperature control unit and a current supplying unit. The temperature control unit controls a temperature of the lithium-ion battery to fall in a predetermined range. The predetermined range is divided into a plurality of sub-divided temperature ranges. The current supplying unit supplies the lithium-ion battery with a temperature-dependent current relation to a sub-divided temperature range in which the temperature of the lithium-ion battery falls.
摘要:
A compact battery pack with high handling ability and restraining degradation of battery cells. The battery pack includes an insertion portion to be inserted into a handle portion of a cordless power tool and an accommodation portion in which all battery cells are accommodatable. A protection board with a protection circuit that protects batteries against overcharge and over-discharge is installed in the insertion portion. A switching element is connected between the battery cells and a drive motor of the power tool. An air passage in communication with the battery pack is formed within the handle and a main housing of the cordless power tool. The switching element is positioned at the air passage.
摘要:
A cordless power tool uses a lithium battery as a power source of a motor and is provided with an overcurrent protection circuit. The circuit allows an overcurrent to instantaneously flow at the start-up time of the motor and shuts off an overcurrent which may flow when the motor is brought into a locked state during the use of the power tool.
摘要:
A battery charger for charging a lithium-ion battery includes a temperature control unit and a current supplying unit. The temperature control unit controls a temperature of the lithium-ion battery to fall in a predetermined range. The predetermined range is divided into a plurality of sub-divided temperature ranges. The current supplying unit supplies the lithium-ion battery with a temperature-dependent current relation to a sub-divided temperature range in which the temperature of the lithium-ion battery falls.
摘要:
A compact battery pack with high handling ability and restraining degradation of battery cells. The battery pack includes an insertion portion to be inserted into a handle portion of a cordless power tool and an accommodation portion in which all battery cells are accommodatable. A protection board with a protection circuit that protects batteries against overcharge and over-discharge is installed in the insertion portion. A switching element is connected between the battery cells and a drive motor of the power tool. An air passage in communication with the battery pack is formed within the handle and a main housing of the cordless power tool. The switching element is positioned at the air passage.
摘要:
A cordless power tool uses a lithium battery as a power source of a motor and is provided with an overcurrent protection circuit. The circuit allows an overcurrent to instantaneously flow at the start-up time of the motor and shuts off an overcurrent which may flow when the motor is brought into a locked state during the use of the power tool.
摘要:
A setting current switching circuit 120 includes a comparator 127. A battery temperature signal corresponding to a battery temperature detected by a battery temperature detecting unit 8 is inputted to one input terminal (−) of the comparator 127 and a reference signal corresponding to a reference temperature is inputted to the other input terminal (+) of the comparator 127 to vary the setting charging current value of a charging current setting unit 80 and the setting full-charge current value of a full-charge current setting unit 90 correspondingly to the output of the comparator 127.
摘要:
A charger includes: a connection portion configured to connect either one of a battery pack and an electric device as an object device, the electric device being configured to generate a power supply related signal related to power supply thereto; a determination unit configured to determine which the battery pack or the electric device is the object device which is connected to the connection portion; and a control unit configured to charge the batter pack through the connection portion when the battery pack is connected to the connection portion, the control unit configured to control power supply to the electric device through the connection portion in accordance with the power supply related signal.
摘要:
A setting current switching circuit 120 includes a comparator 127. A battery temperature signal corresponding to a battery temperature detected by a battery temperature detecting unit 8 is inputted to one input terminal (−) of the comparator 127 and a reference signal corresponding to a reference temperature is inputted to the other input terminal (+) of the comparator 127 to vary the setting charging current value of a charging current setting unit 80 and the setting full-charge current value of a full-charge current setting unit 90 correspondingly to the output of the comparator 127.
摘要:
A battery charger including a charging power supply circuit connected to an input power supply and adapted to charge a battery to be charged, a charging control circuit adapted to control charging of the battery, and a constant voltage power supply adapted to drive the charging control circuit, wherein the charging control circuit stops an output of the constant voltage power supply when the battery is detached from the charger.