A charging device and a power supply method for the charging device

Abstract

An embodiment of the invention discloses charging equipment which comprises a voltage compensation module. The voltage compensation module comprises a detection circuit, a compensation circuit and a switch power source, the detection circuit is used for detecting output voltage of a voltage output end of the charging equipment and charging voltage reaching a charging end of terminal equipment and comparing a difference value between the output voltage and the charging voltage, the compensation circuit is used for calculating a sum of the output voltage and two times of the difference value to acquire output voltage after compensation, and the switch power source is used for adjusting the output voltage of the charging equipment to enable the output voltage to be equal to the output voltage after compensation. The embodiment of the invention further provides a charging method of the charging equipment. By the charging equipment, the problem of overlarge voltage drop on a charging cable can be solved, and charging current of a charging battery of the terminal equipment is guaranteed to be constant, so that charging efficiency is improved while charging time is reduced.

Description

technical field [0001] The invention relates to the technical field of terminal power supply, in particular to a charging device and a power supply method for the charging device. Background technique [0002] End devices generally use rechargeable batteries to provide power. Rechargeable batteries need to be replenished regularly, and the power required for charging is generally converted by the charger to 220V AC. [0003] Such as figure 1 Shown is the working principle diagram of the charger in the prior art. In the prior art, the charger 1a converts 220V AC power into 5V DC voltage, outputs it to the terminal device 3a through the USB connection line 2a, and charges the rechargeable battery of the terminal device 3a. [0004] Since the USB connection line 2a has a certain resistance, so for figure 1 In the prior art shown, when the charging current is large, the voltage loss on the USB connection line 2a is relatively large. For example, assuming that the charging c...

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a charging device and a power supply method for the charging device, which can solve the problem of excessive voltage drop on the charging cable of the charging device, ensure that the charging current of the rechargeable battery of the terminal device is constant, thereby improving the charging efficiency and reducing the charging time

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