Charging circuit and power terminal

Abstract

The disclosure relates to a charging circuit and a power terminal. The charging circuit includes: a charging module, a voltage feedback module, and a voltage calibration module, wherein the charging module, the voltage feedback module, and the voltage calibration module are respectively used to connect to a device to be charged, and the charging module and the voltage calibration module are respectively connected to the voltage feedback module; the voltage calibration module is used to obtain the first cut-off voltage of the device to be charged at the end of this charging, and determine the voltage of the voltage feedback module according to the first cut-off voltage and the preset target cut-off voltage Adjust the parameters, and adjust the voltage feedback module according to the adjusted parameters; the voltage feedback module is also used to generate a feedback signal based on the adjusted parameters and the voltage of the device to be charged during the next charging, so as to calibrate the termination voltage of the device to be charged. In this way, the accuracy of the cut-off voltage of the device to be charged is improved, and the capacity utilization rate of the device to be charged is improved as much as possible on the basis of no 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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