Precision calibration tool and precision calibration system for lithium battery formation

The precision calibration tool and the precision calibration system are applied to lithium battery formation equipment, the lithium battery formation equipment comprises a power supply module, the power supply module comprises a first power supply and a series circuit connected with the first power supply, and the series circuit comprises a plurality of channels connected in series. Each channel comprises a positive electrode port and a negative electrode port; the precision calibration tool comprises a first detection element and a switching assembly. The precision calibration tool comprises a first calibration mode, in the first calibration mode, the first power supply outputs constant current, and the switching assembly controls the first detection element to be connected between the positive port and the negative port of one channel and controls the positive ports and the negative ports of the other channels to be in short circuit. The constant current flows through the first detection element and each ch