Separating device for a battery module, battery module, and motor vehicle

A battery module comprising:

• several battery cells and
• at least one separating device, the at least one separating device comprising:
• a first separating element and a second separating element, which are arranged congruently with respect to one another and adjacent one another,
• wherein the first separating element and the second separating element enclose a sealed chamber therebetween,
• wherein the first separating element and the second separating element each have a plurality of channel-shaped embossments for forming the sealed chamber,
• wherein the plurality of channel-shaped embossments of the first separating element each extend away from the second separating element, and the plurality of channel-shaped embossments of the second separating element each extend away from the first separating element,
• wherein the plurality of channel-shaped embossments of the first separating element and of the second separating element are arranged opposite one another,
• wherein the sealed chamber is filled with a flame-retarding and/or insulating fluid, and
• wherein the at least one separating device is arranged between two adjacent battery cells.