Power tool charging system having a charge level indicator and charge control functions
First Claim
1. A power tool charging system, comprising:
- an electric power tool including, at least one rechargeable battery on which the electric power tool operates, a controller for monitoring charge/discharge level of the at least one battery and for generating data on the charge/discharge level of the at least one battery and a data transmission terminal for externally providing the data on the charge/discharge level of the at least one battery; and
a charger on which the electric power tool is set for charging the at least one battery, the charger supplying charging current to the at least one battery when the electric power tool is set on the charger.
2 Assignments
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Accused Products
Abstract
A charging system includes an electric power tool (2) and a charger (1) having internal rechargeable batteries (6) and a controller (9) for monitoring the charge/discharge level of the batteries (6). The electric power tool (2) additionally includes a pair of charge terminals (13a, 14a) for carrying current to charge the batteries (6), a temperature terminal (15a) for outputting to the charger (1) data on the temperature of the batteries, and a data terminal (16a) for outputting to the charger data on the battery charge/discharge level from the controller (9). The charger (1) includes a pair of charge terminals (13b, 14b), a temperature terminal (15b), and a data terminal (16b) that are electrically connected to the corresponding tool terminals when the tool (2) is set on the charger for a charge. The charging system indicates the remaining charge level on an indicator unit (4) based on the received data on the battery charge/discharge level and changes the amount of the charging current based on the data on the battery charge/discharge level and the battery temperature data received from the tool (2).
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Citations
24 Claims
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1. A power tool charging system, comprising:
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an electric power tool including, at least one rechargeable battery on which the electric power tool operates, a controller for monitoring charge/discharge level of the at least one battery and for generating data on the charge/discharge level of the at least one battery and a data transmission terminal for externally providing the data on the charge/discharge level of the at least one battery; and
a charger on which the electric power tool is set for charging the at least one battery, the charger supplying charging current to the at least one battery when the electric power tool is set on the charger. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A power tool charging system, comprising
a power tool including, at least one rechargeable battery housed within the power tool for supplying power to said power tool, a controller for monitoring a condition of said at least one battery and for generating data based on said condition of said at least one battery, and a data transmission terminal for externally providing the data on said condition of said at least one battery; - and
an external charger housed separately from said power tool and upon which said power tool is set for charging the at least one battery, the external charger supplying charging current to the at least one battery when the power tool is set on the charger. - View Dependent Claims (18, 19, 20, 21)
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22. A power tool charging system, comprising
an electric power tool including, at least one rechargeable battery on which the electric power tool operates, a controller for monitoring charge/discharge level of the at least one battery and for generating data on the charge/discharge level of the at least one battery, a data transmission terminal for externally providing the data on the charge/discharge level of the at least one battery, a temperature sensor for measuring and generating data on the temperature of the at least one battery, and a temperature transmission terminal for externally providing the data on the measured battery temperature; - and
a charger upon which the electric power tool is set for charging the at least one battery, the charger supplying charging current to the at least one battery when the electric power tool is set on the charger, the charger including, a data receive terminal which is connected to the data transmission terminal of the electric power tool when the electric power tool is set on the charger, the data receive terminal receiving the data on the charge/discharge level of the at least one battery from the controller, the charger operating to change the amount of charging current based on the charge/discharge level data, and a temperature receive terminal which is connected to the temperature transmission terminal of the electric power tool when the electric power tool is set on the charger, the temperature receive terminal receiving the measured battery temperature from the temperature sensor, the charger operating to change the charging current based on the measured battery temperature. - View Dependent Claims (23, 24)
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Specification