Shared Control of Thermistor and Dual Purpose Thermistor Line

摘要

A battery pack can include a temperature sensor that can provide an output that is indicative of a temperature associated with the battery pack. A battery management unit can directly measure the temperature sensor when the battery pack is by itself or engaged with a tool. A charger can directly read the temperature sensor when the battery pack is engaged with the charger. Thus, the temperature sensor can be shared by the battery pack and the charger. The battery pack can utilize a same terminal that provides access to the temperature sensor to indicate a stop-charge signal. The charger can read the stop-charge signal on the same terminal used to directly access the temperature sensor.

主权项

1. A power tool system comprising:
at least one power tool; a battery pack comprising a plurality of battery cells and a battery management unit; and a battery charger configured to charge the battery pack; wherein the battery pack is coupleable with the at least one power tool to provide power to the at least one power tool; and wherein the battery pack is operatively coupleable with the battery charger such that the battery charger can charge the battery pack; wherein the battery management unit is configured to output a first signal indicative of a voltage of at least one of the battery cells relative to a low-voltage threshold; and wherein the battery management unit is further configured to output a second signal indicative of a voltage of at least one of the battery cells relative to a high voltage threshold.