Motor vehicle

Abstract

A motor vehicle having a vehicle body an electrical traction machine, and at least one electrical energy accumulator designed as a traction battery for temporarily storing electrical energy for operating the traction machine. The vehicle body and/or a battery housing of the traction battery is/are provided at least in some regions within intumescent fire protection coating.

Claims

1. A motor vehicle comprising: a traction battery comprising a plurality of battery cells arranged within a battery housing, the traction battery configured to temporarily store electrical energy, and a battery receptacle space in which the battery housing is arranged, whereby the housing is contained at least partially by a vehicle body component delimiting the battery receptacle space, wherein an outer surface of the battery housing is provided with a first fire protection coating, wherein an inner surface of the vehicle body component, which faces the battery housing, is provided with a second fire protection coating, and wherein the first fire protection coating and the second fire protection coating each comprise an intumescent coating.

2. The motor vehicle as claimed in claim 1, wherein an outer surface of the vehicle body component, which faces away from the battery housing, is provided with a third fire protection coating comprising the intumescent coating.

3. The motor vehicle as claimed in claim 2, wherein the second fire protection coating has a higher activation temperature than the third fire protection coating.

4. The motor vehicle as claimed in claim 1, wherein the vehicle body component is a floor panel of the motor vehicle arranged between the battery housing and a passenger compartment.

5. The motor vehicle as claimed in claim 1, wherein the battery receptacle space is further delimited by a weatherproof cover.

6. The motor vehicle as claimed in claim 1, wherein the intumescent coating comprises at least one of ammonium polyphosphate, polyurethane, and sodium silicate.

7. The motor vehicle as claimed in claim 1, wherein the intumescent coating comprises polyurethane, and wherein the intumescent coating is at least partially foamed when applied to at least one of the battery housing and the vehicle body component.

8. The motor vehicle as claimed in claim 1, wherein at least one of the first fire protection coating and the second fire protection coating comprise the intumescent coating applied in a plurality of successive layers.

9. The motor vehicle as claimed in claim 8, wherein a first of the plurality of successive layers comprises ammonium polyphosphate, and wherein a second of the plurality of successive layers comprises sodium silicate but does not include ammonium polyphosphate.

10. The motor vehicle as claimed in claim 8, wherein a first of the plurality of successive layers comprises sodium silicate, and wherein a second of the plurality of successive layers comprises ammonium polyphosphate but does not include sodium silicate.

11. The motor vehicle as claimed in claim 8, wherein a first of the plurality of successive layers comprises sodium silicate but does not include ammonium polyphosphate, and wherein a second of the plurality of successive layers comprises ammonium polyphosphate but does not include sodium silicate.

12. The motor vehicle as claimed in claim 1, wherein at least one of the first fire protection coating and the second fire protection coating is configured to be an acoustic insulation layer.

13. The motor vehicle as claimed in claim 1, wherein the second fire protection coating is applied to an acoustic insulation layer of the vehicle body component.

14. The motor vehicle as claimed in claim 1, wherein the first fire protection coating is the only fire protection coating with which the battery housing is provided.

15. The motor vehicle as claimed in claim 14, wherein a structure of the battery housing to which the first fire protection coating is applied has a higher thermal conductivity than that of the first fire protection coating.

16. The motor vehicle as claimed in claim 1, wherein the intumescent coating comprises ammonium polyphosphate, polyurethane, and sodium silicate.

17. The motor vehicle as claimed in claim 16, wherein intumescent coating further comprises polyvalent alcohol.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) In the following, the invention will be explained in greater detail with reference to the exemplary embodiments depicted in the drawings, without the invention being restricted. In the single FIGURE

(2) FIG. 1 shows a schematic illustration of a motor vehicle.

DETAILED DESCRIPTION

(3) The FIGURE shows a schematic illustration of a motor vehicle 1, which has a vehicle body 2. The motor vehicle 1 has an electrical traction machine (not shown here) and a traction battery 3, in which electrical energy for operating the traction machine can be temporarily stored. The traction battery 3 is preferably composed of a plurality of battery cells 4, only a few of which are identified by way of example. The battery cells 4 are arranged in a battery housing 5, which in turn is located in a battery receptacle space 6 of the motor vehicle 1.

(4) The battery receptacle space 6 is delimited at least in regions by the vehicle body 2, namely a vehicle body component 7 of the vehicle body 2. The vehicle body component 7 is preferably arranged as shown here between a passenger compartment 8 of the motor vehicle 1 and the traction battery 3. For example, the vehicle body component 7 is provided in the form of a floor panel of the motor vehicle 1. The battery receptacle space 6 can be designed to be weatherproof by means of a cover 9. The cover 9 is preferably fastened to the vehicle body 2, in particular fastened so it is detachable without damage, so that easy replacement of the traction battery 3 is ensured.

(5) An intumescent fire protection coating 10 is applied to the body component 7 at least in some regions or over the entire surface. The fire protection coating 10 is designed in such a way that it foams up, i.e., increases its material thickness, in case of fire of the traction battery 3 or if the temperature in the battery receptacle space 6 exceeds a limiting value. As a result, the thermal conductivity of the fire protection coating 10 is significantly reduced, so that in particular the passenger compartment 8 is protected from a thermal influence of the traction battery 3.

(6) The fire protection coating 10 preferably additionally serves as an acoustic insulation layer, so that the separate attachment or application of such an acoustic insulation layer can be dispensed with. Of course, however, it can alternatively be provided that the fire protection coating 10 is applied to an acoustic insulation layer. A compact formation is also achieved in this case.

(7) The described design of the motor vehicle 1 has the advantage that the vehicle body 2 and above all a passenger compartment 8 is reliably protected from a thermal influence of the traction battery 3, in particular in case of fire. The intumescent fire protection coating 10 is used for this purpose, which has, for example, ammonium phosphate, polyurethane, and/or sodium silicate.