The invention relates to a storage battery system which includes at least one storage battery module and a coolant circulation system, wherein the coolant circulation system has at least one coolant container and at least one coolant pipeline, the coolant pipeline is guided to partially pass through the storage battery module and is such configured that the coolant pipeline has at least one emergency situation opening in the storage battery module, the emergency situation opening is closed by an operation element, the operation element is configured to be a pressure-sensitive operation element, the operation element is opened under the circumstance that the pressure is larger than a threshold value Pgrenz and releases the emergency situation opening, and the coolant container has a joint used for a fire extinguishing agent hose or has a connector used for fixing a joint of a fire extinguishing agent hose. The invention also relates to a method used for extinguishing or stopping fire of a storage battery module.