Rechargeable battery

A rechargeable battery, comprising:

• cells;
• said cells including elements for electromotive force and each cell being formed in a rectangular shape having short sides with a narrow width, long sides with a wide width relative to the narrow width, a top side, and bottom side;
• said cells including coolant passages defined on said long sides in a vertical direction and coolant flowing in said coolant passages;
• and
• said cells including at least two groups of cells wherein the cells of each of the at least two groups are linked together adjacent to one another at the short sides to form at least two battery modules wherein the cells form at least one row in each of the at least two battery modules, the at least two battery modules being arranged in parallel with the long sides of the battery cells of the respective ones of the at least two battery modules adjacent one another, and the battery modules being linked together to form a battery pack and the cells being electrically connected.