Large-power integrated lithium battery

The utility model provides a large-power integrated lithium battery. The large-power integrated lithium battery comprises a DC power supply interface, an AC power supply interface, a first comparator, a second comparator, a third comparator, a power switch, a control switch, a signal processing circuit, a variable constant current/voltage limiting DC charger, a 14.4V lithium battery and management circuit, a voltage detection circuit, an inverter and a constant current/voltage limiting AC charger. The large-power integrated lithium battery comprises the power switch, and the input terminal of the power switch is connected to the DC power supply in terface and the 14.4V lithium battery and management circuit, so that the DC power supply can be directly output and the 14.4V high-capacity lithium battery can be output, and the DC power supply is output in priority; and an AC charging function and a DC charging function are achieved, with the AC charging being the priority, so that the large-power integrated lithium battery can serve as the high-capacity storage battery employed in a car, and multiple functions can be provided for users to select.