System and method for balancing electrical energy storage devices via differential power bus and capacitive load switched-mode power supply
First Claim
1. An apparatus including circuitry for transferring electrical energy among multiple electrical energy storage devices, comprising:
- a first differential power bus;
a first plurality of electrical energy storage devices;
a first plurality of switches responsive to a first plurality of multiplexing control signals to multiplex said first plurality of electrical energy storage devices to said first differential power bus;
a first shuttle capacitor; and
a first bidirectional switched-mode power supply coupled between said first differential power bus and said shuttle capacitor and responsive to at least a first portion of one or more duty cycle control signals by transferring a first polarity of said first electrical energy between a multiplexed electrical energy storage device and said first shuttle capacitor.
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Accused Products
Abstract
System and method are provided for transferring electrical energy among multiple electrical energy storage devices via a differential power bus and a capacitive load switched-mode power supply. The switched-mode power supply transfers the electrical energy between the load capacitor and the differential power bus to which the electrical energy storage devices (e.g., rechargeable batteries and/or capacitors connected in parallel or series or combinations of both) are electrically connected via bus switches. As a result, electrical energy is efficiently transferred and distributed among the electrical energy storage devices.
23 Citations
9 Claims
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1. An apparatus including circuitry for transferring electrical energy among multiple electrical energy storage devices, comprising:
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a first differential power bus; a first plurality of electrical energy storage devices; a first plurality of switches responsive to a first plurality of multiplexing control signals to multiplex said first plurality of electrical energy storage devices to said first differential power bus; a first shuttle capacitor; and a first bidirectional switched-mode power supply coupled between said first differential power bus and said shuttle capacitor and responsive to at least a first portion of one or more duty cycle control signals by transferring a first polarity of said first electrical energy between a multiplexed electrical energy storage device and said first shuttle capacitor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification