Charging circuit and power terminal

Abstract

The invention relates to a charging circuit and a power terminal, the charging circuit comprises a charging module, a voltage feedback module and a voltage calibration module, the charging module, thevoltage feedback module and the voltage calibration module are respectively used for being connected with a to-be-charged device, and the charging module and the voltage calibration module are connected with the voltage feedback module; the voltage calibration module is used for acquiring a first termination voltage of the to-be-charged device at the end of the current charging, determining an adjustment parameter of the voltage feedback module according to the first termination voltage and a preset target termination voltage, and adjusting the voltage feedback module according to the adjustment parameter; and the voltage feedback module is also used for generating a feedback signal based on the adjusted parameter and the voltage of the to-be-charged device during the next charging so asto calibrate the termination voltage of the to-be-charged device. Therefore, the precision of the termination voltage of the to-be-charged device is improved, and the capacity utilization rate of theto-be-charged device is improved as much as possible on the basis of not generating an overshoot phenomenon.

Description

technical field [0001] The present disclosure relates to the technical field of charging, and in particular, to a charging circuit and a power terminal. Background technique [0002] In the broadband power line carrier HPLC communication module, it is necessary to use the supercapacitor charging and discharging management mechanism to realize the function of power outage reporting. Supercapacitor charging generally adopts the constant current (CC) constant voltage (CV) charging method. This method uses a constant high current charging at the initial stage of charging. When the capacitor voltage reaches the preset charging termination voltage, the charging current is reduced to zero, and To maintain the capacitor voltage at the preset end-of-charge voltage, that is, to switch from the constant current mode to the constant voltage mode. [0003] In the later stage of constant voltage charging, the preset charge termination voltage of the supercapacitor needs to be precisely c...

AI Technical Summary

Problems solved by technology

If the preset end-of-charge voltage is low, it will lead to the problem of low capacity utilization of the super capacitor; if the preset end-of-charge voltage is too high, overcharging will occur if the rated working voltage of the super capacitor is exceeded, resulting in a decrease in the capacity of the capacitor , the problem of shortened lifespan

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