Cooling plate and method of manufacturing a cooling plate

A cooling plate for battery cooling, comprising:

• a plate body, which has two plate elements joined together by soldering;
• at least one cooling channel for the passage of a cooling fluid;
• and
• a stiffening molding, wherein a channel portion between the at least one cooling channel and the stiffening molding is closed in a fluid-tight manner by a closing element.

A method of manufacturing a cooling plate, the method comprising:

• forming a plate stack from
• at least two plate elements comprising a metallic material, and
• a soldering material arranged between the at least two plate elements;
• inserting the plate stack into a heated form soldering tool, which has a lower tool and an upper tool;
• closing the heated form soldering tool, wherein the lower tool and the upper tool move towards each other to clamp the plate stack between the lower tool and the upper tool;
• heating up the plate stack;
• an internal pressure process of applying internal pressure to an intermediate space between the at least two plate elements by introducing an active medium into the intermediate space and forming a channel in at least one plate element of the at least two plate elements;
• a soldering joining process of melting the soldering material between the at least two plate elements and soldering joining of the at least two plate elements to contacting joint surfaces to obtain the cooling plate, wherein a closing element is formed by which the channel is separated into a cooling channel and a stiffening molding;
• and
• opening the heated form soldering tool and removing the cooling plate from the heated form soldering tool.