US 2014/0349146 A1 · BATTERY HAVING A PLURALITY OF ACCUMULATOR CELLS AND METHOD FOR OPERATING SAME

Abstract

A battery (100) has first accumulator cells (111 . . . 114) connected in series to form at least one cell string (110), and second accumulator cells (121 . . . 124) are arranged so that cells can be connected in parallel to individual cells of the first accumulator cells (111 . . . 114) by switching elements (131 . . . 133′, 134, 134′). To compensate the charge between the cells, the switching elements (131 . . . 133′, 134, 134′) can establish two-way connections (A, B) between the first and second accumulator cells. Each second accumulator cell (121) can be connected in parallel alternately either to a first accumulator cell (111) within the cell string (110) or to another adjacent first accumulator cell (112). The switching elements (131 . . . 133′, 134, 134′) are controllable and alternately establish the two-way connections (A, B) between the first and second accumulator cells at predefined time intervals (TA, TB) so that each second accumulator cell (121) is connected in parallel to one first accumulator cell (111) in a first time interval (TA) and to the other first accumulator cell (112) in a second time interval (TB).

Claims8

Dependent claims

A battery (100) comprising a plurality of accumulator cells of which the N first accumulator cells (111 . . . 114) are connected together in series to at least one cell string (110), wherein said N second accumulator cells (121 . . . 124) are arranged to be individually switched by switching elements (131 . . . 133, 134, 134′) to one of the N first accumulator cells (111 . . . 114) in parallel;

wherein
the switching elements (131 . . . 133, 134, 134′) are adapted to establish two-way connections (A, B) between the first and second accumulator cells, each of the second accumulator cell (121) being alternately switchable in parallel either to a first accumulator cell (111) of the cell string (110) or to another first accumulator cell (112) being adjacent thereto, and in that the second accumulator cells (121 . . . 124) that are switched by said means of switching elements (131 . . . 133, 134, 134′) are connected in series to a second cell string (120, 120′, 120″) that is arranged or connected in parallel to the first cell string (110);
whereby the battery comprises at least two strings of cells, each string including the same number of N cells.

A method of operating a battery (100) comprising:

providing a plurality of accumulator cells of which the N first accumulator cells (111 . . . 114) are connected together in series to at least one cell string (110), wherein said N second accumulator cells (121 . . . 124) are arranged to be individually switched by switching elements (131 . . . 133, 134, 134′) to one of the N first accumulator cells (111 . . . 114) in parallel;
and
operating the switching elements (131 . . . 133, 134, 134′) to establish two-way connections (A, B) are established between the first and second accumulator cells, wherein each of the second accumulator cell (121) is alternately switched in parallel either to a first accumulator cell (111) of the cell string (110) or to another first accumulator cell (112) being adjacent to thereto, and in that the second accumulator cells (121 . . . 124) that are switched by said means of switching elements (131 . . . 133, 134, 134′) are connected in series to a second cell string (120, 120′, 120″) that is arranged or connected in parallel to the first cell string (110);
whereby the battery comprises at least two strings of cells, each string including the same number of N cells.

1 more element

Dependencies are inferred from the claim text.

Battery having a plurality of accumulator cells and method for operating same

Life of this patent

Battery having a plurality of accumulator cells and method for operating same

Life of this patent

Abstract

Claims8