DIFFUSION-LIMITED ADAPTIVE BATTERY CHARGING
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Abstract
Some embodiments of the present invention provide a system that adaptively charges a battery, wherein the battery is a lithium-ion battery which includes a transport-limiting electrode governed by diffusion, an electrolyte separator and a non-transport-limiting electrode. During operation, the system determines a lithium surface concentration at an interface between the transport-limiting electrode and the electrolyte separator based on a diffusion time for lithium in the transport-limiting electrode. Next, the system calculates a charging current or a charging voltage for the battery based on the determined lithium surface concentration. Finally, the system applies the charging current or the charging voltage to the battery.
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Citations
38 Claims
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1-17. -17. (canceled)
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18. A mechanism for charging a battery, the mechanism comprising:
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a controller; a voltage sensor and a current sensor coupled to the controller, and each coupleable to a battery having a first electrode, a second electrode, and at least one interface therebetween; and at least one of a current source and a voltage source, each coupled to the controller and coupleable to the battery, wherein the controller is configured to; receive voltage information from the voltage sensor; receive current information from the current sensor; and control, based at least in part on the received voltage information and current information following a prior charging event, at least one of the current source and the voltage source to charge the battery. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. A controller for a battery charger including a current source and a voltage source, the controller configured to:
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receive voltage information from a voltage sensor after a prior charging event; receive current information from a current sensor after the prior charging event; control, based at least in part on the received voltage information and the received current information, at least one of the current source and the voltage source to charge the battery. - View Dependent Claims (26, 27, 28, 29, 30, 31)
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32. A non-transitory computer readable storage medium storing instructions which, when executed by a controller, cause the controller to:
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receive voltage information from a voltage sensor following a prior charging event; receive current information from a current sensor following the prior charging event; and control, based at least in part on the received voltage information and the received current information, at least one of a current source and a voltage source to charge the battery. - View Dependent Claims (33, 34, 35, 36, 37, 38)
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Specification