Multiple function current-sharing charging system and method
First Claim
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1. A method of charging two rechargeable power supplies comprising:
- providing a charging system;
providing a universal serial bus (USB) connection;
sending an identification signal via the USB connection, using the USB'"'"'s data lines;
providing a first charging current to a first rechargeable power supply via the USB connection using the V-bus power line, the first charging current enabled to exceed USB current draw limitations;
recognizing the identification signal to draw the first charging current at a level that exceeds USB current draw limitations;
drawing the first charging current that exceeds USB current draw limitations;
determining an available second charging current based on a difference between the first charging current and a maximum output of the charging system; and
while continuing to provide the first charging current using the USB'"'"'s V-bus power line, charging a second rechargeable power supply by providing the second charging current based on the available second charging current.
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Abstract
Multiple function current-sharing charging systems and methods are provided. Where first and second rechargeable power supplies are connected to a charging system, a first charging current is provided to the first rechargeable power supply and a second charging current is provided to the second rechargeable power supply. Upon detection of a predetermined charge level of one of the rechargeable power supplies, a third charging current is provided to the first rechargeable power supply and a fourth charging current is provided to the second rechargeable power supply.
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Citations
9 Claims
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1. A method of charging two rechargeable power supplies comprising:
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providing a charging system; providing a universal serial bus (USB) connection; sending an identification signal via the USB connection, using the USB'"'"'s data lines; providing a first charging current to a first rechargeable power supply via the USB connection using the V-bus power line, the first charging current enabled to exceed USB current draw limitations; recognizing the identification signal to draw the first charging current at a level that exceeds USB current draw limitations; drawing the first charging current that exceeds USB current draw limitations; determining an available second charging current based on a difference between the first charging current and a maximum output of the charging system; and while continuing to provide the first charging current using the USB'"'"'s V-bus power line, charging a second rechargeable power supply by providing the second charging current based on the available second charging current. - View Dependent Claims (2, 3, 4, 5)
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6. A method of charging two rechargeable power supplies, the power supplies in devices, comprising:
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providing a charging system; providing universal serial bus (USB) connections at the charging system and the devices; sending an identification signal via a first USB connection, using the first USB'"'"'s data lines, to a first device with a first rechargeable power supply; sending an identification signal via a second USB connection, using the second USB'"'"'s data lines, to a second device with a second rechargeable power supply; providing a first charging current to the first rechargeable power supply via the first USB connection using a first V-bus power line, the first charging current enabled to exceed USB current draw limitations; recognizing the identification signal to draw the first charging current at a level that exceeds USB current draw limitations; drawing the first charging current such that USB current draw limitations are exceeded; determining an available second charging current based on a difference between the first charging current and a maximum output of the charging system; and while continuing to provide the first charging current using the USB'"'"'s V-bus power line, charging a second rechargeable power supply by providing a second charging current based on the available second charging current. - View Dependent Claims (7, 8, 9)
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Specification