TRACTION BATTERY SYSTEM OF A MOTOR VEHICLE

A traction battery system of a motor vehicle, including at least two battery modules which each include a plurality of batteries. The battery module includes a module housing including a housing case and at least one housing cover. The battery module includes a venting unit having a vent opening and having a bursting element. Gas can be discharged from the module housing via the vent opening. The traction battery system includes a first longitudinal support and a second longitudinal support between which the battery modules are disposed. The longitudinal support has a vent chamber which is configured to receive and pass the gas flowing via the venting unit. A cooling chamber, which extends along the vent chamber, is configured separately from the vent chamber for cooling the gas flowing in the longitudinal support.