The present invention discloses a
polymer lithium battery circuit for
the Internet of Things, the circuit includes a PMOS tube Q1, a PMOS tube Q2 and a boost
chip U10, wherein: the source of the PMOS tube Q1 is connected to VBAT, the drain of the PMOS tube Q1 is connected to a communication module; the source of the PMOS tube Q2 is connected to the communication module, and the drain of the PMOS tube Q2 is respectively connected to pin 7 and pin 8 of the boost
chip U10; pin 1 and pin 2 of the boost
chip U10 are both grounded, and a
resistor R6 is provided between pin 4 and pin 5 of the boost chip U10, and one end of the
resistor R6 is connected to pin 4 of the boost chip U10. The embodiment of the present invention uses a boost circuit when the
voltage is lower than 3.4V, which not only makes efficient use of the
battery capacity, but also makes the battery conversion efficiency reach the optimal value, reducing the
energy loss in the conversion process; when the
voltage is 3.6V, since the body effect
diode voltage drop inside the PMOS tube Q1 is greater than 0.6V, the boost circuit can be prevented from backflowing to the battery, reducing one anti-
backflow MOS tube, and reducing the cost.