Abstract: The power sub-assembly (3) for a micro-hybrid system (1) in an automobile includes a AC-DC converter (8) with a transistor bridge (13), an energy storage device (10) and a power bus (9) including at least two substantially symmetrical and parallel conductors (22). The conductors (22) include respective substantially planar surfaces (23, 23?) facing each other. The power bus integrated in the power subassembly allows for a parasitic inductance that is by far lower than that of the standard cables in power subassemblies of the prior art, particularly in order to avoid overvoltage at the terminals of the transistors in the AC-DC converter.

Abstract: A power supply device for a motor vehicle, comprising a housing containing at least one unit for storing electrical energy and cooling means of the unit consisting of at least two cooling devices which can be selectively controlled by control means for regulating the quantity of heat to be dissipated by the cooling means.

Abstract: An electrical energy storage device (1), in particular for equipping a motor vehicle, comprises: at least one energy storage cell (2), p1 an electronic unit (3), comprising in particular an electronic card (11), the electronic unit being in particular different from a voltage converter, at least one electrical connection (4) connecting the at least one energy storage cell and the electronic unit to enable this electronic unit to have available information representing an electrical quantity, in particular an electrical potential, of the energy storage cell, the electrical connection comprising at least one substantially rigid electrical element (12) provided with an end (15) remote from the cell (2).