Charging system and charging method, and power adapter
First Claim
Patent Images
1. A power adapter, comprising:
- a first rectifier, configured to rectify a first alternating current and output a first voltage with a first ripple waveform;
a switch circuit, configured to modulate the first voltage according to a control signal and output a modulated first voltage;
a transformer, configured to output a plurality of voltages with ripple waveforms according to the modulated first voltage;
a compositing circuit, configured to composite the plurality of voltages to output a second alternating current, wherein, for each cycle of the second alternating current, a peak voltage of a positive half is greater than an absolute value of a valley voltage of a negative half, and the second alternating current is configured to be introduced into a terminal to charge a battery in the terminal when the power adapter is coupled to the terminal;
a sampling circuit, configured to sample voltage and/or current at a primary winding of the transformer to obtain a voltage sampling value and/or a current sampling value;
a control circuit, coupled to the sampling circuit and the switch circuit respectively, and configured to output the control signal to the switch circuit, and to adjust a duty ratio of the control signal according to the current sampling value and/or the voltage sampling value, such that the second alternating current meets a charging requirement of the terminal when the power adapter is coupled to the terminal.
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Abstract
The present disclosure discloses a charging system, a charging method and a power adapter. The system includes a battery, a first rectifier, a switch unit, a transformer, a compositing unit, a sampling unit, and a control unit. The control unit outputs a control signal to the switch unit, and adjusts a duty ratio of the control signal according to a voltage sampling value and/or a current sampling value obtained by primary sampling of the sampling unit, such that a second alternating current outputted by the compositing unit meets a charging requirement. The second alternating current is applied to the battery.
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Citations
29 Claims
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1. A power adapter, comprising:
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a first rectifier, configured to rectify a first alternating current and output a first voltage with a first ripple waveform; a switch circuit, configured to modulate the first voltage according to a control signal and output a modulated first voltage; a transformer, configured to output a plurality of voltages with ripple waveforms according to the modulated first voltage; a compositing circuit, configured to composite the plurality of voltages to output a second alternating current, wherein, for each cycle of the second alternating current, a peak voltage of a positive half is greater than an absolute value of a valley voltage of a negative half, and the second alternating current is configured to be introduced into a terminal to charge a battery in the terminal when the power adapter is coupled to the terminal; a sampling circuit, configured to sample voltage and/or current at a primary winding of the transformer to obtain a voltage sampling value and/or a current sampling value; a control circuit, coupled to the sampling circuit and the switch circuit respectively, and configured to output the control signal to the switch circuit, and to adjust a duty ratio of the control signal according to the current sampling value and/or the voltage sampling value, such that the second alternating current meets a charging requirement of the terminal when the power adapter is coupled to the terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A charging system, comprising:
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a battery; a first rectifier, configured to rectify a first alternating current and output a first voltage with a first ripple waveform; a switch circuit, configured to modulate the first voltage according to a control signal and output a modulated first voltage; a transformer, configured to output a plurality of voltages with ripple waveforms according to the modulated first voltage; a compositing circuit, configured to composite the plurality of voltages to output a second alternating current, wherein, for each cycle of the second alternating current, a peak voltage of a positive half is greater than an absolute value of a valley voltage of a negative half; a sampling circuit, configured to sample voltage and/or current at a primary winding of the transformer to obtain a voltage sampling value and/or a current sampling value; and a control circuit, coupled to the sampling circuit and the switch circuit respectively, and configured to output the control signal to the switch circuit, to adjust a duty ratio of the control signal according to the current sampling value and/or the voltage sampling value, such that the second alternating current meets a charging requirement of the battery. - View Dependent Claims (28)
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29. A charging method, comprising:
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performing a rectification on a first alternating current to output a first voltage with a first ripple waveform; modulating the first voltage by controlling a switch circuit, and outputting a plurality of voltages with ripple waveforms by a conversion of a transformer; compositing the plurality of voltages to output a second alternating current, wherein, for each cycle of the second alternating current, a peak voltage of a positive half is greater than an absolute value of a valley voltage of a negative half; applying the second alternating current to a battery; sampling voltage and/or current at a primary winding of the transformer to obtain a voltage sampling value and/or a current sampling value; and adjusting a duty ratio of a control signal for controlling the switch circuit according to the voltage sampling value and/or the current sampling value, such that the second alternating voltage meets a charging requirement of the battery.
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Specification