Rail vehicle

1. A rail vehicle, comprising:

on-track undercarriages;

a vehicle frame supported on said on-track undercarriages;

a vehicle superstructure with at least one driver's cabin;

an electric energy store;

a motive drive having an electric motor supplied by means of said electric energy store;

said electric energy store having a tempering by means of a liquid dielectric;

said vehicle superstructure having a compartment with at least one fire protection cabinet and a dielectric tank, said compartment being separate from said driver's cabin, and in said compartment said electric energy store is disposed within said at least one fire protection cabinet with said dielectric tank disposed there above;

a magnetic valve;

a fire-fighting line lockable by said magnetic valve, wherein said dielectric tank is connected to said fire protection cabinet via said fire-fighting line; and

the rail vehicle configured to, in an event of a shut-down of the rail vehicle, compensate for dielectric leakage as a result of a malfunction, with liquid dielectric from said dielectric tank via the fire-fighting line that is opened by the magnetic valve that has become currentless in the event of the shut-down of the rail vehicle.

2. The rail vehicle according to claim 1 , wherein said compartment is accessible and is separated from said driver's cabin.

3. The rail vehicle according to claim 1 , wherein said electric energy store has an accumulator block formed in each case of a master module and at least one slave module, and that each of said master and slave modules have several battery cells around which the liquid dielectric flows.

4. The rail vehicle according to claim 1 , wherein said electric energy store has fire protection panels and several accumulator blocks which are disposed separated by said fire protection panels in said fire protection cabinet.

5. The rail vehicle according to claim 1 , further comprising:

a compensating line; and

a dielectric circuit, said dielectric tank is connected via said compensating line to said dielectric circuit for tempering said electric energy store.

6. The rail vehicle according to claim 5 , wherein said dielectric circuit has at least one pump, a heat pump and a temperature probe.

7. The rail vehicle according to claim 1 , further comprising:

a smoke sensor;

a temperature sensor; and

an alarm unit coupled to said smoke sensor disposed in said fire protection cabinet and/or to said temperature sensor.

8. The rail vehicle according to claim 1 ,

wherein said compartment has a separate power converter cabinet;

further comprising a power converter disposed in said separate power converter cabinet; and

further comprising at least one aerosol cartridge disposed in said power converter cabinet.

9. The rail vehicle according to claim 1 , wherein said vehicle superstructure has a fire protection wall and/or a passage and said compartment is accessible and is separated from said driver's cabin by means of said fire protection wall and/or said passage.

10. A method of fire prevention or fire fighting within an electric energy store, the method comprising the steps of:

providing the rail vehicle according to claim 1 ; and

compensating, in an inoperative state, a dielectric leaking in an event of a leakage as a result of a malfunction, by the liquid dielectric from the dielectric tank via the opened fire-fighting line.

11. The method according to claim 10 , wherein in an operating state, in case a temperature limit is detected within the electric energy store, increasing a cooling capacity of a dielectric circuit, and compensating for a change in volume of the liquid dielectric via a compensating line between the dielectric circuit and the dielectric tank.