Galvanically isolated charge balance system
AssigneeAnalog Devices, Inc.
InventorsJohn Wynne, Eamon Hynes
Life of this patent
Estimating the term…
Abstract
A galvanically isolated charge balance system for a multicell battery includes a balancing circuit associated with each cell; each balancing circuit including a flying capacitor; a variable conductance switch; and a biasing circuit for the variable conductance switch; and a galvanically isolating MEMS switching device for selectively connecting the flying capacitor to a voltage supply to charge it to a predetermined voltage and to the biasing circuit for setting the variable conductance switch to adjust the charge on its associated cell to a preselected level.
Claims9
A galvanically isolated charge balance system for a multicell battery comprising:
- a balancing circuit associated with each cell;
- each balancing circuit including a flying capacitor;
- a variable conductance switch;
- and a biasing circuit for said variable conductance switch;
- and
- a galvanically isolating MEMS switching device for selectively connecting said flying capacitor to a voltage supply to charge it to a predetermined voltage and to said biasing circuit for setting said variable conductance switch to adjust the charge on its associated cell to a preselected level.
A galvanically isolated charge balance system for a multicell battery comprising:
- a balancing circuit associated with each cell;
- each balancing circuit including a flying capacitor;
- a variable conductance switch;
- and a biasing circuit for said variable conductance switch;
- and
- a galvanically isolating MEMS switching device for selectively connecting said flying capacitor to a voltage supply to charge it to a predetermined voltage and to said biasing circuit for setting said variable conductance switch to discharge its associated cell to a preselected level.
A galvanically isolated charge balance system for a multicell battery comprising:
- a balancing circuit associated with each cell;
- each balancing circuit including a flying capacitor;
- a variable conductance switch;
- and a biasing circuit for said variable conductance switch;
- and
- a galvanically isolating MEMS switching device for selectively connecting said flying capacitor to a voltage supply to charge it to a predetermined voltage and to said biasing circuit for setting said variable conductance switch to charge its associated cell to a preselected level.
Dependencies are inferred from the claim text.