Abstract: A system for balancing a series connection of energy storage devices having: an intermediate storage element coupled between a pair of sections of one or a number of adjacent energy storage devices of a series connection of energy storage devices, sections each having a more positive terminal (A) at one end and a more negative terminal (B) at its other end; and a switching device for switching sequentially between coupling terminals (A) to each other via intermediate storage element and coupling terminals (B) to each other via intermediate storage element wherein the sections are non-adjacent. A method for balancing a series connection between energy storage devices is also disclosed.

Abstract: A system for balancing a series connection of energy storage devices having: an intermediate storage element coupled between a pair of sections of one or a number of adjacent energy storage devices of a series connection of energy storage devices, sections each having a more positive terminal (A) at one end and a more negative terminal (B) at its other end; and a switching device for switching sequentially between coupling terminals (A) to each other via intermediate storage element and coupling terminals (B) to each other via intermediate storage element wherein the sections are non-adjacent. A method for balancing a series connection between energy storage devices is also disclosed.