A power system for managing charging, discharging and protection of
rechargeable batteries is disclosed. The power system mainly includes a
power system. The power system includes a switching circuit coupled to
the rechargeable batteries to charge and discharge the rechargeable
batteries. The power system includes a power management unit to control
the switching circuit. The power system includes a temperature sensing
circuit to monitor a temperature of the batteries, voltage detectors to
monitor voltages of the batteries, and current detectors to monitor a
current of the batteries. If an abnormal condition is sensed by the power
management unit when the power system is in an operating mode, the power
management unit will terminate the operating mode by switching off the
switching circuit to protect the batteries and the power system.