DC-charging power source adaptor and mobile terminal
First Claim
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1. A DC-charging power source adaptor comprising:
- a charging interface configured to be connected with a mobile terminal having a battery, the charging interface comprising a power source pin, a ground pin, and two communication pins shorted by default;
an AC to DC converting unit configured to convert an external AC input power source into a charging voltage required by the mobile terminal, and output the charging voltage via the charging interface; and
a controlling unit in connection with the charging interface, and configured to disconnect the two communication pins of the charging interfaces from each other upon detecting that the charging interface is connected with the mobile terminal, and communicate with the mobile terminal through the two communication pins to adjust the charging voltage output by the AC to DC converting unit, and wherein the controlling unit is further configured to;
receive a target charging voltage value sent by the mobile terminal and adjust the charging voltage output by the AC to DC converting unit according to the target charging voltage value to reach the target charging voltage value;
orreceive a voltage of the battery sent by the mobile terminal, if the voltage of the battery is in a range delimited by preset DC-charging thresholds, search a preset reference table using the voltage of the battery as a target charging voltage value corresponding to the current voltage of the battery, feedback the target charging voltage value to the mobile terminal, and adjust the charging voltage output by the AC to DC converting unit to the target charging voltage value, and if the voltage of the battery is out of the range delimited by the preset DC-charging thresholds, control the AC to DC converting unit to output constant charging voltage.
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Abstract
This disclosure relates to a DC-charging power source adaptor including a charging interface, an AC to DC converting unit, and a controlling unit; and the DC-charging power source adaptor is timed to communicate with a mobile terminal which is a charging object, to acquire a change in voltage of a battery in the mobile terminal and further adjust dynamically a volt value of charging voltage output by the DC-charging power source adaptor according to the change in voltage of the battery, and DC-charges the battery in the mobile terminal using the charging voltage.
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Citations
20 Claims
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1. A DC-charging power source adaptor comprising:
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a charging interface configured to be connected with a mobile terminal having a battery, the charging interface comprising a power source pin, a ground pin, and two communication pins shorted by default; an AC to DC converting unit configured to convert an external AC input power source into a charging voltage required by the mobile terminal, and output the charging voltage via the charging interface; and a controlling unit in connection with the charging interface, and configured to disconnect the two communication pins of the charging interfaces from each other upon detecting that the charging interface is connected with the mobile terminal, and communicate with the mobile terminal through the two communication pins to adjust the charging voltage output by the AC to DC converting unit, and wherein the controlling unit is further configured to; receive a target charging voltage value sent by the mobile terminal and adjust the charging voltage output by the AC to DC converting unit according to the target charging voltage value to reach the target charging voltage value;
orreceive a voltage of the battery sent by the mobile terminal, if the voltage of the battery is in a range delimited by preset DC-charging thresholds, search a preset reference table using the voltage of the battery as a target charging voltage value corresponding to the current voltage of the battery, feedback the target charging voltage value to the mobile terminal, and adjust the charging voltage output by the AC to DC converting unit to the target charging voltage value, and if the voltage of the battery is out of the range delimited by the preset DC-charging thresholds, control the AC to DC converting unit to output constant charging voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A mobile terminal comprising:
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a communicating and receiving interface configured to communicate with a DC-charging power source adaptor to send a change in voltage of a battery in the mobile terminal to the DC-charging power source adaptor so that the DC-charging power source adaptor dynamically adjusts a volt value of a charging voltage output by the DC-charging power source adaptor according to the change in voltage, and receive the charging voltage provided by the DC-charging power source adaptor; and a sending unit configured to send a specific pulse waveform to the DC-charging power source adaptor after the mobile terminal is connected with the DC-charging power source adaptor, and wherein the sending unit is further configured to; send a target charging voltage value to the DC-charging power source adaptor so that the DC-charging power source adaptor adjusts the charging voltage provided by the DC-charging power source adaptor according to the target charging voltage value to reach the target charging voltage value;
orsend a voltage of the battery to the DC-charging power source adaptor so that if the voltage of the battery is in a range delimited by preset DC-charging thresholds, the DC-charging power source adaptor searches a preset reference table using the voltage of the battery as a target charging voltage value corresponding to the current voltage of the battery, and adjusts the charging voltage provided by the DC-charging power source adaptor to the target charging voltage value; and wherein the communicating and receiving interface is configured to receive the target charging voltage value determined based on the preset reference table if the voltage of the battery is in a range delimited by preset DC-charging thresholds, and receive a constant charging voltage provided by the DC-charging power source adaptor if the voltage of the battery is out of the range delimited by the preset DC-charging thresholds.
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15. A DC-charging power source adaptor comprising:
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a charging interface configured to be connected with a mobile terminal having a battery, the charging interface comprising a power source pin, a ground pin, and two communication pins shorted by default; an AC to DC converting unit configured to convert an external AC input power source into a charging voltage required by the mobile terminal, and output the charging voltage via the charging interface, the AC to DC converting unit including a rectifying circuit, a transformer, a synchronous rectification controller, and a PWM controller, the rectifying circuit configured to rectify an AC input power source into a DC power source and output the DC power source to the transformer for transformation into the charging voltage; and a controlling unit in connection with the charging interface, and configured to disconnect the two communication pins of the charging interfaces from each other upon detecting that the charging interface is connected with the mobile terminal, and communicate with the mobile terminal through the two communication pins to adjust the charging voltage output by the AC to DC converting unit, the controlling unit including a controller and a digital potentiometer, the digital potentiometer including a resistor body connected in series with a current-limiting resistor and between an anode of a secondary coil of the transformer and ground, the resistor body including an intermediate tap connected with a reference voltage pin of the synchronous rectification controller, the controller configured to conduct UART communication with the mobile terminal through UART interfaces of the controller, generate a voltage adjusting instruction according to the charging voltage required by the mobile terminal and send the voltage adjusting instruction to the digital potentiometer to change a resistance value of a valid resistor of the digital potentiometer, wherein the synchronous rectification controller is configured to adjust a duty ratio of a PWM signal output by the PWM controller according to the varying resistance value of the valid resistor of the digital potentiometer, and control a switching timing of the transformer using the PWM signal to adjust a volt value of the charging voltage output by the transformer. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification