NOVELTY - The device (1) has a heat guide plate (2) heat conductively connectable with an outer surface of an energy storage unit over a contact surface (3) of the heat guide plate. A pipe (4) conducts a fluid medium and is heat conductively with the heat guide plate. The heat guide plate comprises an edge area (5) outside the contact surface. The pipe comprises a pipe section (6) that exhibits a gradient along the edge area and rests on the edge area in the gradient along the edge area. The edge area comprises a width that is smaller than a triple maximum outer diameter of the pipe section.    USE - Control device for use in a battery module (claimed) for controlling a temperature of an energy storage unit such as galvanic cell e.g. lithium ion cell, lead acid battery, zinc/air cell, lithium/air cell and nickel metal hydride cell and capacitor i.e. double-layer capacitor, that is utilized as an electrical energy storage unit e.g. electrostatic energy storage unit and electrochemical energy storage unit, for driving a vehicle e.g. hybrid car and electric car. Can also be used for a fuel cell.    ADVANTAGE - The heat guide plate comprises the edge area outside the contact surface, and the pipe comprises the pipe section that exhibits the gradient along the edge area and rests on the edge area in the gradient along the edge area, thus manufacturing the device in a simple, space-saving and inexpensive manner. The device is constructed in a simple manner and enables effective transfer of heat between the fluid medium in the pipe and the contact surface adjacent to the energy storage unit. The device exhibits a compact structure.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (1) a battery module    (2) a method for manufacturing a control device for controlling a temperature of an energy storage unit.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a control device for controlling a temperature of an energy storage unit.    Control device (1)    Heat guide plate (2)    Contact surface of heat guide plate (3)    Pipe (4)    Edge area of heat guide plate (5)    Pipe section (6)