| 摘要 |
A battery pack, using a battery having one or more cells as a power source and for connecting power to an external host device, and including charging/discharging apparatus connected in series with the battery and for performing charging and discharging, current detecting apparatus for detecting charging and discharging current, voltage detecting apparatus for detecting voltage, temperature detecting means for detecting temperature, and a controller, whereby the controller is operated in such manner that it turns the state from at least one of charging state, discharging state, charging stop state, and discharging stop state to another state by controlling the charging/discharging apparatus based on the charging/discharging current, the voltage and the temperature as detected, and the state information is transmitted to the external host device when there is a request or at regular interval or when there is state transition, and state transition such as a charging/discharging state or a stop state of the battery pack controlled according to charging/discharging current, voltage, and temperature is controlled and information of state transition can be managed and controlled by the external host device.
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