Fire protection cover element for an electrical component of a motor vehicle, electrical component and method

Abstract

The invention relates to a fire protection cover element (7) for an electrical component (1) of a motor vehicle, with at least one fastening area (8) by means of which the fire protection cover element (7) is to be held on a housing element (2) of the electrical component (1), with a base body (9) by means of which a ventilation opening (4) of the electrical component (1) can be at least partially covered, and with at least one ventilation area (11) for ventilating the electrical component (1) via the ventilation opening (4).

Description

[0001] The invention relates to a fire protection cover element for an electrical component of a motor vehicle according to claim 1. Furthermore, the invention relates to an electrical component for a motor vehicle according to claim 9 and to a method for mounting such a fire protection element on a housing element of an electrical component for a motor vehicle according to claim 10.

[0002] CN 220 653 225 U discloses a vehicle-mounted power supply with a protection mechanism, comprising a protective shell and a mounting seat, wherein a mounting groove is provided on the top of the mounting seat, a power supply body is provided in the mounting groove, two symmetrically arranged mounting grooves are provided on the top of the mounting seat, two mounting rods are fixedly attached to the underside of the protective shell, the two mounting rods are each adapted to the adjacent mounting grooves, and a flame-retardant cover is slid onto the power supply body.

[0003] The object of the invention is to provide a fire protection cover element for an electrical component of a motor vehicle, an electrical component for a motor vehicle, and a method for mounting a fire protection element on a housing element of an electrical component for a motor vehicle, so that fire protection of the motor vehicle can be particularly increased.

[0004] This problem is solved according to the invention by a fire protection element for an electrical component of a motor vehicle with the features of claim 1, by an electrical component for a motor vehicle with the features of claim 9, and by a method for mounting such a fire protection element on a housing element of an electrical component for a motor vehicle with the features of claim 10. Advantageous embodiments of the invention are the subject of the dependent claims and the description.

[0005] A first aspect of the invention relates to a fire protection element for an electrical component of a motor vehicle. The motor vehicle is, for example, a car, in particular a passenger car. Preferably, the motor vehicle, especially in its fully manufactured state, has the electrical component, which in particular includes the fire protection cover element.

[0006] The electrical component is, for example, designed as a high-voltage component. This means that the electrical component has an electrical voltage, in particular an electrical operating or nominal voltage, which is preferably greater than 50 volts, particularly above 60 volts, and preferably several hundred volts.

[0007] For example, the electrical component is designed as an electric machine or as an inverter. The term inverter can be understood to refer specifically to power electronics. Particularly preferably, the electrical component is designed as an electric machine which includes an inverter. The inverter can also be referred to as a power inverter or a rotary converter. The term inverter can be understood to refer specifically to an electrical device that converts a direct current (DC) voltage into an alternating current (AC) voltage.

[0008] The fire protection cover element has at least one fastening area by which the fire protection cover element is held, in particular at least indirectly or directly, to a housing element of the electrical component, for example at least in a form-fitting manner. In other words, the fire protection cover element can be fastened or is fastened, for example at least indirectly or directly, to the housing element of the electrical component, for example at least in a form-fitting manner. The housing element is, for example, a motor housing of the electrical machine.

[0009] Furthermore, the fire protection cover element has a base body, which is distinct from the fastening area and is made of a fire-resistant material, such as metal, particularly steel. The base body allows a ventilation opening of the electrical component to be at least partially, and in particular predominantly or completely, covered, especially in the axial direction of the ventilation opening, particularly to the outside. In other words, the ventilation opening can be at least partially, and in particular predominantly or completely, closed off or sealed by means of the housing element, especially in the axial direction of the ventilation opening.This means that the ventilation opening is at least partially covered by the base body, or at least partially closed by the base body, when the fire protection cover element is in its intended installation position in or on the electrical component. The fire protection element is thus designed, for example, as a fire protection cover, which can also simply be referred to as a cover. The ventilation opening is preferably designed as a through-opening.

[0010] In particular, the ventilation opening can be used to ventilate the electrical component, for example, its interior. The interior is, for example, at least partially, predominantly, or completely enclosed by the housing element. Preferably, the interior extends at least partially, and in particular predominantly or completely, within the housing element. The interior is, for example, part of the motor housing of the electric machine. For example, the interior opens via the ventilation opening into the surroundings of the electrical component, this surroundings being located, in particular, within the motor vehicle. Preferably, pressure equalization, that is, in particular, pressure equalization between the interior and the surroundings, can be achieved or is achieved via the ventilation opening. Thus, the ventilation can at least include pressure equalization. The interior is, for example, an inverter compartment.Thus, the inverter compartment can be ventilated via the ventilation opening. For example, at least one pressure equalization element (PEE) is arranged in the ventilation opening. In other words, the pressure equalization element is, for example, accommodated or housed in the ventilation opening. The pressure equalization element has, for example, at least one membrane, which is preferably designed to effect pressure equalization. The membrane is, for example, gas-tight or gas-permeable. For example, the membrane is designed as a pressure diaphragm.

[0011] The fire protection cover element has at least one ventilation area, for example, one through which air can flow, for ventilating the electrical component, particularly the interior, via the ventilation opening. This means that the electrical component, and especially the interior, can be ventilated via the ventilation opening, i.e., through the ventilation opening. Thus, the ventilation described above takes place via the ventilation area of ​​the fire protection cover element. Accordingly, the aforementioned pressure equalization can occur via the ventilation area through the ventilation opening. In other words, the ventilation opening opens into the environment via the ventilation area.This means that the ventilation opening, in particular a partial area of ​​the ventilation opening extending in the axial direction behind or below the base body, can be fluidically connected to or is connected to the environment via the ventilation area.

[0012] The fire protection cover element according to the invention significantly enhances fire protection for motor vehicles, and thus, in particular, vehicle safety, in the event of a thermal event in the electrical component. This thermal event results, for example, from a short-circuit fault in the electrical component, such as in the inverter of the electric motor. Such a short-circuit fault, which can simply be described as a short circuit, can, in principle, be caused by contamination in the electrical component. Particularly high currents can flow during this short circuit, which can trigger the thermal event.Hot combustion gases generated during a thermal event, which may expand explosively, could, in principle, erupt with a jet of flame, for example, through the pressure equalization element, from the interior of the electrical component (i.e., from the internal space) through the ventilation opening into the surrounding environment. A flame spike during a thermal event can be particularly short-lived because the pressure equalization element can act like a pressure relief valve. Therefore, the pressure equalization element might not withstand the particularly high pressure caused by the thermal event, especially if the flame is particularly intense. Consequently, the pressure equalization element could potentially be breached and / or catch fire.

[0013] Because the ventilation opening can be covered, or is covered, by means of the base body of the fire protection cover element according to the invention, the described jet of flame can be at least partially mitigated and, for example, diverted in a controlled manner, or prevented from escaping the electrical component via the ventilation opening, by means of the fire protection cover element, in particular by means of the base body. In this respect, the base body acts, for example, as an impact element, in particular as a baffle plate, against which the jet of flame can strike during the thermal event.This significantly increases safety in the event of a vehicle fire, as it prevents, for example, a jet of flame from exiting the electrical component through the ventilation opening at particularly high pressure and temperature, and thus from reaching the vehicle body and / or other components located near the electrical component, such as engine compartment walls. This effectively prevents fire from spreading to the vehicle and / or other components. In particular, it prevents the jet of flame or a fire from spreading to insulation material, such as acoustic mats, attached to the vehicle body.Thus, the risk of a vehicle fire caused by a malfunction in a high-voltage assembly, such as an electrical component in the electric motor, can be significantly reduced by means of the fire protection cover element according to the invention. In particular, the fire protection cover element, preferably the base body, is designed to withstand the aforementioned jet of flame, thereby reliably preventing the flame from penetrating the fire protection cover element or the base body. Therefore, even if, during an extreme thermal event, the inverter, for example, burns out, particularly explosively, the protection against the fire spreading to other components can be significantly increased, thus greatly enhancing fire protection.Overall, it is evident that a protective cover against the thermal event can be achieved using the fire protection cover element according to the invention.

[0014] Because the fire protection cover element incorporates a ventilation area, ventilation via the opening is still possible even when the opening is covered or closed, thus enabling, for example, the pressure equalization described above. If a jet of flame (also simply referred to as a flame) and / or the combustion gases resulting from the fire within the electrical component escape into the environment via the ventilation area, the jet of flame and the combustion gases are mitigated, particularly by the fire protection cover element. This is because the jet of flame and the combustion gases have, for example, first impacted the base body and been deflected. Alternatively or additionally, the ventilation area allows combustion gases to flow through in a radial direction around the ventilation opening.This allows the exit length, over which the combustion gases or the jet of flame can escape into the environment in the axial direction of the ventilation opening, to be kept particularly short, since the combustion gases or the jet of flame can be deflected outwards, i.e. especially in the radial direction.

[0015] Furthermore, the fire protection cover element, in particular the base body, can protect the pressure equalization element, especially its membrane, from dirt and / or deposits. This can significantly increase the service life of the pressure equalization element, especially the electrical component. In particular, the corrosion resistance of the pressure equalization element can be significantly improved.

[0016] In a further embodiment, it is provided that the fire protection cover element, for example, the base body of the fire protection cover element, can be arranged or is arranged at least partially, and in particular predominantly or completely, within the ventilation opening. This means that the fire protection cover element, in particular the base body, can be received or is received at least partially, and in particular predominantly or completely, within the ventilation opening, especially when the fire protection cover element is held on the housing element via the fastening area. In other words, the fire protection cover element is arranged at least partially within the ventilation opening when the fire protection cover element is in its installed position in or on the electrical component.This allows the ventilation opening to be covered particularly securely by the fire protection cover element, thereby significantly increasing safety against vehicle fires.

[0017] In a further embodiment, it is provided that, particularly for holding the fire protection cover element on the housing element, the fire protection cover element can be connected or is connected, via the fastening area, for example at least indirectly or directly, to at least one wall of the housing element that at least partially, and in particular predominantly or completely, defines the ventilation opening, for example in the radial direction of the ventilation opening to the outside. This means that at least one positive-locking connection with the wall can be formed or is formed via the fastening area. The fire protection cover element can thus be held on the housing element via the fastening area by means of the positive-locking connection. This means that the previously described holding of the fire protection cover element on the housing element via the fastening area can be achieved or is achieved by the positive-locking connection.This allows the fire protection cover element to be held particularly securely to the housing element or wall, especially in the ventilation opening. This significantly increases the resistance of the fire protection cover element to combustion gases and / or flashovers, thereby greatly enhancing the fire protection of the vehicle.

[0018] The fact that the ventilation opening is at least partially bounded by the wall can be understood, in particular, to mean that the ventilation opening is at least partially formed by the wall. Specifically, the housing element has the ventilation opening.

[0019] To create the positive-locking connection, the fastening area has, for example, at least one fastening element, projecting outwards from the base body, particularly in the radial direction of the fire protection cover element. This means that the positive-locking connection with the wall can be formed, or is formed, by means of the fastening element.

[0020] However, the fire protection cover element preferably has several fastening elements projecting outwards in the radial direction of the fire protection cover element, particularly the base body, by means of which a positive-locking connection with the wall can be formed or is formed. This means that the fastening elements can be positively connected to the wall, for example directly, or are connected in a positive-locking manner. The positive-locking connection is, in particular, a positive lock that prevents the fire protection cover element from detaching from the housing element or the wall in the axial direction of the ventilation opening, especially unintentionally.The positive-locking connection achieved via the fastening elements allows the fire protection cover element to be held particularly securely on the housing element, especially in the ventilation opening, thereby significantly increasing the resistance of the fire protection cover element to combustion gases and / or flashovers. The fact that the fastening elements project outwards in the radial direction of the fire protection cover element or the base body can be understood to mean, in particular, that the fastening elements connect to the base body in the radial direction of the fire protection cover element or the base body, at least indirectly or directly.

[0021] In a further embodiment, it is provided that a gap extends between the fastening elements in the circumferential direction of the fire protection cover element, particularly the base body. In other words, the fastening elements are spaced apart from each other in the circumferential direction of the fire protection cover element, particularly the base body. This means that a gap is provided between each pair of fastening elements, especially adjacent ones, in the circumferential direction of the fire protection cover element or the base body, and this gap extends in the circumferential direction, with this gap being designed as a free space. Thus, the gap can be understood as the free space. In particular, the gap is free of material from the fire protection cover element.This allows the fire protection cover element to be attached to the housing element particularly securely, while at the same time keeping the weight of the fire protection cover element particularly low.

[0022] Preferably, the spaces between the components form at least part of the ventilation area. In other words, each space is a sub-area of ​​the ventilation area. This means that the electrical component, particularly the interior, can be ventilated or is ventilated via the respective space. Therefore, it is specifically intended that the ventilation described above, for example, pressure equalization, can be achieved or is achieved via the respective space, particularly at least partially, predominantly, or completely.This makes it particularly difficult for the escape of the jet of flame and / or combustion gases from the ventilation opening, especially because the combustion gases or the jet of flame escape radially outwards through the gaps and are thus redirected or deflected to escape. This significantly increases fire protection.

[0023] In a further embodiment, it is provided that when the fire protection cover element, in particular the base body, is positioned in the ventilation opening, the fastening elements are subjected to a force, particularly mechanical force, exerted by the housing element, in particular the wall. This means that the fastening elements can be subjected to, or are subjected to, force by the housing element, in particular the wall, when the fire protection cover element, in particular the base body, is positioned in the ventilation opening. This results in the fastening elements moving relative to the base body from a first position to a second position that differs from the first position, caused in particular by deformation of the fire protection cover element, for example, the fastening elements.This means that the movement of the fasteners, in particular their deformation, from the first position to the second position can be effected, or is effected, by the mounting element, especially the wall, acting upon the fasteners. In the second position, the positive locking connection can be formed, or is formed, particularly when the fire protection cover element is in its installed position in or on the electrical component. Specifically, the positive locking connection is not formed in the first position. This means, for example, that a positive locking connection cannot be formed in the first position.Preferably, the diameter of the fire protection cover element in the first position is smaller than in the second position, whereby, for example, with reference to the first position and the second position exclusively, the fire protection cover element, in particular the base body, can be arranged or is arranged in the ventilation opening in the first position. For example, the diameter of the fire protection cover element in the first position is smaller than the diameter of the ventilation opening, or the diameter of the fire protection cover element in the first position corresponds to the diameter of the ventilation opening.For example, in the second position, the diameter of the fire protection cover element is larger than the diameter of the ventilation opening. This allows the fastening elements to be positively connected to the wall in the second position, for example, by engaging in at least one groove. This prevents the removal of the fire protection cover element, especially the base, from the ventilation opening. As a result, the fire protection cover element can be securely attached to the housing element, particularly within the ventilation opening, thereby significantly increasing its resistance to flames and combustion gases. Furthermore, the fire protection cover element can be installed with minimal effort.This allows the manufacturing costs of the electrical component, and therefore of the vehicle in particular, to be kept especially low. This, in turn, allows the fire protection of the vehicle to be significantly increased in a particularly cost-effective manner.

[0024] Alternatively or additionally, it is preferably provided that the fastening elements, particularly in the second position, extend at least substantially parallel to the base body and preferably perpendicular to the axial direction of the ventilation opening. In other words, the fastening elements, particularly in the second position, run at least substantially parallel to the base body and preferably at least substantially perpendicular to the axial direction of the ventilation opening. This can particularly increase resistance to unintentional loosening of the positive-locking connection in the axial direction of the ventilation opening. This can particularly improve fire protection. Preferably, in the first position, the fastening elements extend obliquely or perpendicularly to the base body and, for example, obliquely or parallel to the axial direction of the ventilation opening.

[0025] In a further embodiment, the base body is provided with at least one bulge on a side facing the housing element, particularly when the fire protection cover element is installed on or in the electrical component. In other words, the base body is curved, especially in the direction of the housing element. Specifically, the bulge projects from the base body, i.e., from a portion of the base body, towards the housing element, adjoining, for example, this portion of the base body. Preferably, the bulge is arranged centrally in the radial direction of the base body, particularly on the base body or the portion thereof. In other words, a central axis of the base body or the ventilation opening, extending axially in the direction of the base body and / or the ventilation opening, passes through the bulge.The curvature deflects the combustion gases or the jet of flame, thereby redirecting the flow direction of the combustion gases or the propagation direction of the jet of flame from the axial direction of the ventilation opening. This causes the flow direction or the exit direction to run, for example, radially outwards from the opening. This minimizes the mechanical stress on the fire protection cover element, which results primarily from the impact of the jet of flame and / or combustion gases on the fire protection cover element, particularly the base body. This can be achieved, in particular, by ensuring that the deflection caused by the curvature prevents the jet of flame or the combustion gases from striking the base body perpendicularly, but preferably at an angle.This can significantly increase the resistance of the fire protection cover element to fire gases or flash fires.

[0026] A second aspect of the invention relates to an electrical component for a motor vehicle. The electrical component comprises at least one housing element and at least one ventilation opening. Furthermore, the electrical component comprises at least one fire protection cover element, particularly according to the first aspect of the invention. Advantages and advantageous embodiments of the first aspect of the invention are to be regarded as advantages and advantageous embodiments of the second aspect of the invention, and vice versa.

[0027] The fire protection cover element has at least one fastening area by which it is held to the housing element, for example, at least by a positive fit. Furthermore, the fire protection cover element has a base body by means of which the ventilation opening is at least partially covered, for example, in the axial direction of the ventilation opening, particularly to the outside. In addition, the fire protection cover element has at least one ventilation area for ventilating the electrical component via the ventilation opening.

[0028] A third aspect of the invention relates to a method for mounting a fire protection cover element according to the first aspect of the invention on a housing element of an electrical component, in particular according to the second aspect of the invention, for a motor vehicle or the motor vehicle itself. Advantages and advantageous embodiments of the first and second aspects of the invention are to be regarded as advantages and advantageous embodiments of the third aspect of the invention and vice versa.

[0029] For example, during operation, the fire protection cover element, in particular the base body, is arranged on the housing element, especially in the ventilation opening. The fastening elements are initially, for example, in the first position. For example, when the fire protection cover element, in particular the base body, is arranged in the ventilation opening, the fastening elements are acted upon by the housing element, in particular the wall, whereby, for example, by shaping the fire protection cover element, in particular the fastening elements, the fastening elements are moved relative to the base body from the first position to the second position, whereby the positive locking connection is formed, in particular in the second position.This means that in the second position, the fire protection cover element is or will be positively attached to the housing element, in particular the wall, above the fastening area.

[0030] Further features of the invention will become apparent from the claims, the figures, and the description of the figures. The features and combinations of features mentioned above in the description, as well as the features and combinations of features mentioned below in the description of the figures and / or shown in the figures alone, are not only usable in the combinations specified, but also in other combinations or on their own.

[0031] The invention will now be explained in more detail with reference to a preferred embodiment and the drawings. The drawings show: Fig. 1 a schematic and perspective partial view of an electrical component according to the invention; and Fig. 2 a schematic and perspective partial view of an electrical component according to the invention to illustrate a drain opening; and Fig. 3 a schematic partial sectional view of an electrical component according to the invention; and Fig. 4 a schematic perspective view of a fire protection cover element according to the invention; and Fig. 5 a schematic partial sectional view of an electrical component according to the invention to illustrate a positive locking connection; and Fig. 6 a schematic and perspective detail view of an electrical component according to a further embodiment of the invention to illustrate a drain opening; and Fig. 7 a schematic and perspective underview of a fire protection cover element according to a further embodiment of the invention.

[0032] In the figures, identical or functionally equivalent elements are provided with the same reference symbols.

[0033] Fig. Figure 1 shows a schematic and perspective partial view of an electrical component 1 for a motor vehicle. The electrical component 1 is, for example, designed as an electric machine, which preferably includes an inverter. The motor vehicle can be driven, for example, by means of the electric machine. Thus, the electric machine is, for example, designed as the electric traction machine of the motor vehicle. The motor vehicle is, for example, a battery-electric vehicle or a hybrid vehicle.

[0034] The electrical component 1 has at least one housing element 2, which can also be referred to as a machine housing. Thus, the housing element 2 can be understood to be, in particular, a housing for the electrical component 1. For example, the inverter is arranged within the housing element 2. For example, the housing element 2 encloses a Fig. 1 interior space 3 of the electrical component 1, not shown, wherein, for example, the inverter is arranged in this interior space 3.

[0035] The electrical component 1 has at least one ventilation opening 4, which is arranged, in particular, on the housing element 2. Thus, the housing element 2 can have the ventilation opening 4. The electrical component 1, in particular the interior 3, can be ventilated via the ventilation opening 4, especially by pressure equalization. Thus, the ventilation can, in particular, include pressure equalization. In this case, the interior 3 opens via the ventilation opening 4 into an environment 5 of the electrical component 1, whereby the ventilation opening 4 is, for example, a bore in the inverter.

[0036] How particularly good in Fig. 1 and Fig. As can be seen in Figure 2, in the exemplary embodiment the ventilation opening 4 is at least partially covered by a pressure equalization element 6. Fig. Figure 2 shows electrical component 1 in a schematic and perspective detail view. Furthermore, electrical component 1 is shown in Fig. 3 is shown in a schematic partial sectional view. The ventilation opening 4 is located in Fig. 1-3 thus, in particular, at least partially behind or below the pressure equalization element 6. In the present case, the pressure equalization element 6 is arranged at least partially, in particular predominantly or completely, in the ventilation opening 4. Thus, in particular, the ventilation opening 4 is at least partially closed by the pressure equalization element 6. Preferably, the pressure equalization element 6 has at least one membrane, which can also be referred to as a pressure equalization membrane. Thus, the ventilation opening 4 can be understood, for example, as a through-opening in the housing element 2, which is, for example, clamped shut by the pressure equalization element 6. For example, the pressure equalization element 6 is bonded to the housing element 2, in particular glued into the housing element 2.

[0037] In order to significantly increase safety against vehicle fires, i.e., to significantly enhance fire protection of the vehicle, the electrical component 1 has at least one fire protection cover element 7, which is designed separately from the housing element 2. The fire protection cover element 7 is in Fig. Figure 4 shows a schematic perspective view. The fire protection cover element 7 has at least one fastening area 8, by means of which the fire protection cover element 7 is held, for example, directly, to the housing element 2, for example, at least in a form-fitting manner. Furthermore, the fire protection cover element 7 has a base body 9, by means of which the ventilation opening 4 is at least partially covered. This is shown by way of example in Fig. Figure 1 illustrates the fire protection cover element 7, whereby in Fig. 1. The ventilation opening 4 is covered by the base body 9 of the fire protection cover element 7. In Fig. Figure 2 does not show the fire protection cover element 7, thus revealing the pressure equalization element 6. The fire protection cover element 7, in particular the base body 9, is therefore arranged, for example, especially in the axial direction 10 of the ventilation opening 4, between the interior 3 and the surroundings 5. By covering the ventilation opening 4 with the base body 9, combustion gases and / or a flame resulting from a fire in the interior 3, in particular a jet flame, can be prevented from escaping into the surroundings 5 ​​via the ventilation opening 4, or this escape can at least be reduced. This can reliably prevent the ignition of vehicle components located in the surroundings 5, thereby significantly increasing safety in the event of a vehicle fire.The fire protection cover element 7, in particular the base body 9, functions primarily as a baffle element, for example as a baffle plate, which is designed to be struck by the combustion gases and / or the flame, and thereby in particular causes the combustion gases or the flame to be deflected or deflected. Preferably, the fire protection cover element 7, in particular the base body 9, and the ventilation opening 4 are arranged coaxially with each other.

[0038] Furthermore, the fire protection cover element has at least one ventilation area 11, through which air and / or combustion gases can flow, for example, to ventilate the electrical component 1, in particular the interior space 3, via the ventilation opening 4. Thus, for example, during normal operation of the electrical component 1, the interior space 3 can be ventilated, in particular by means of the pressure equalization element 6, via the ventilation opening 4 and via the ventilation area 11, in particular by pressure equalization.

[0039] The fire protection cover element 7, for example the base body 9, is made of a fire-resistant or flame-retardant material, for example a metal. For example, the fire protection cover element 7, in particular the base body 9, is made of steel, in particular stainless steel. The wall thickness of the base body 9 is, for example, at least 1 mm, for example 2 mm.

[0040] As in Fig. As can be seen particularly well in Figure 1, the exemplary embodiment provides that the fire protection cover element 7, in particular the base body 9, can be arranged, or is arranged, at least partially within the ventilation opening 4. In this case, the ventilation opening 4 has a round, in particular circular, cross-section. Furthermore, the base body 9 also has a round, in particular circular, cross-section. Thus, the fire protection cover element 7, in particular the base body 9, is preferably designed to correspond to the ventilation opening 4.

[0041] In this case, the ventilation opening 4 is at least partially bounded by a wall 12 of the housing element 2. The wall 12 projects, for example, particularly in the axial direction 10 of the ventilation opening 4, and especially outwards, from a base wall 13 of the housing element 2. In this embodiment, the fire protection cover element can be positively connected to the wall 12 via the fastening area 8, for example directly. As in Fig. As can be seen particularly well, the fastening area encloses or surrounds the base body 9 in the circumferential direction 14 of the fire protection cover element 7, in particular the base body 9.

[0042] In the present case, the fastening area 8 has several fastening elements 16 projecting outwards in a radial direction 15 from the fire protection cover element 7, in particular from the base body 9. A positive-locking connection with the wall 12 can be formed or is formed by means of these fastening elements 16. The respective fastening element 16 is, for example, designed as a respective wall section of the fire protection cover element 7, in particular from the fastening area 8. For this purpose, the fastening elements 16 engage, for example, in a receiving opening 17 in the wall 12. Thus, the fastening elements 16 are specifically designed to engage in the receiving opening 17. In other words, the fastening elements 16 can be arranged, or are arranged, at least partially in the receiving opening 17, thereby forming or forming the positive-locking connection. The receiving opening 17 is, for example, designed as a groove.Since the fire protection cover element 7 can be attached to the housing element 2 via this groove using the fastening elements 16, the groove can also be referred to as a retaining groove or fastening groove. Fig. Figure 5 shows the electrical component 1 in a schematic and perspective detail view, where in Fig. Figure 5 illustrates the positive locking connection. Fig. Figure 5 shows the receiving opening 17 only schematically. It may be intended that the receiving opening 17 be deeper than shown. Fig. 5 is shown, formed. Thus, the wall 12 can extend further inwards in the radial direction of the ventilation opening 4 than is shown in Fig. Figure 5 is shown. In particular, in the formed positive-locking connection, the respective fastening element 16 is covered by the wall 12 in the axial direction 10 of the ventilation opening 4, especially on both sides.

[0043] In the exemplary embodiment, the respective fastening element 16 is connected to the base body 9 via a respective connection area 18, in particular directly. This is particularly well suited in Fig. 4. The respective connection area 18 projects, for example, in the axial direction 10 of the ventilation opening 4 and / or in the axial direction 10 of the fire protection cover element 7 from the base body 9, for example at an angle or perpendicularly. In this case, the respective fastening element 16, and in particular the respective connection area 18, is arranged on a side 19 of the fire protection cover element 7, in particular of the base body 9, facing the housing element 2 or the ventilation opening 4. Side 19 can thus be understood to be, in particular, the underside of the fire protection cover element 7. In particular, side 19 faces away from the surroundings 5 ​​and / or towards the interior 3. Side 19 can therefore also be described as the side facing the interior 3 or the side facing away from the surroundings 5.Furthermore, the fire protection cover element 7, in particular the base body 9, has a second side 20 that differs from side 19 and faces the surroundings 5, i.e., away from the housing element 2 or the ventilation opening 4. Thus, the second side 20 faces away from the interior 3. The second side 20 can be understood to be, in particular, the top surface of the fire protection cover element 7, specifically the top surface of the base body 9.

[0044] In this embodiment, a gap 21 extends between each of the fastening elements 16 in the circumferential direction 14 of the fire protection cover element 7, in particular the base body 9. Thus, several gaps 21 can be provided, with each gap 21 extending between two, in particular adjacent, fastening elements 16. The fastening area 8 can therefore be interrupted by the gaps 21. Preferably, the gaps 21 form at least partially, in particular predominantly or completely, the ventilation area 11. In particular, the fastening elements 16 and / or the gaps 21 are arranged uniformly in the circumferential direction 14. The fastening elements 16 and the gaps 21 thus form, for example, a uniform, zigzag pattern.

[0045] For example, the fastening elements 16 are located outside an installation position of the fire protection cover element 7 in a first position, in which the fastening elements 16 extend obliquely to the base body 9, for example, in particular at a 45-degree angle. As a result, the fire protection cover element 7 in the first position has a first diameter which is preferably no larger than the diameter of the ventilation opening 4.

[0046] Preferably, it is provided that when the fire protection cover element 7, in particular the base body 9, is arranged or mounted in the ventilation opening 4, the fastening elements 16 are subjected to pressure from the housing element 2, in particular the wall 12, especially when a force, in particular a compressive force, is exerted on the fire protection cover element 7, in particular on the base body 9, for example in the axial direction 10. This force allows the fire protection cover element 7 to be supported against the wall 12, in particular via the fastening elements 16, thereby enabling or causing the fastening elements 16 to be subjected to pressure from the housing element 2 or the wall 12.This application of force, and in particular the aforementioned force, preferably causes the fastening elements 16 to move relative to the base body 9 from the first position to a second position that differs from the first position, in which the positive-locking connection can be formed or is formed. This means that, particularly with regard to the first and second positions, the fastening elements 16 engage in the receiving opening 17 only in the second position. In the second position, the diameter of the fire protection cover element 7 is preferably larger than in the first position, and in particular larger than the diameter of the ventilation opening 4. This allows a particularly secure positive-locking connection to be achieved in a particularly cost-effective manner. The aforementioned movement of the fastening elements 16 is, for example, a pivoting of the fastening elements about a respective pivot axis.This means that the respective fastening element 16 can be pivoted about a respective pivot axis relative to the base body 9, or is pivoted. In particular, the movement or pivoting of the respective fastening element 16 can be effected, or is effected, by deformation of the fire protection cover element 7, especially the base body 9. In the second position 22, the fastening elements extend, for example, at least substantially parallel to the base body 9 and preferably perpendicular to the axial direction 10 of the ventilation opening 4.Thus, the fastening elements 16, also referred to as prongs, can, for example, in the first position protrude obliquely, for example at a 45-degree angle, from the base body 9 so that they fit into the ventilation opening 4, and in particular into the receiving opening 17, during installation. When the fire protection cover element 7 is pressed against it, the fastening elements 16 can be deformed from the first position into the second position 22. The force or pressure can be applied using an installation tool.

[0047] The intake opening 17 is in Fig. 6 is particularly easy to recognize, since in Fig. 6 the electrical component 1 is shown in a schematic and perspective detail view and in Fig. 6 the fire protection cover element 7 is not shown.

[0048] In the exemplary embodiment, the wall 12 has an outlet opening 23, through which a liquid can flow. This is particularly advantageous in Fig. 2 and in Fig. 6. Liquid, especially water, that has entered the ventilation opening 4 via the ventilation area 11, particularly the respective space 21, can be discharged from the ventilation opening 4, especially into the surroundings 5, via the outlet opening 23. For this purpose, the outlet opening 23 is preferably located at the lowest point of the ventilation opening 4. The outlet opening 23 can be understood as a drain opening. Accordingly, the outlet opening 23 ensures, in particular, that the liquid does not remain on the housing element 2 or in a recess of the housing element 2.

[0049] In this embodiment, the fire protection cover element 7, in particular the base body 9, has at least one curvature 24 on the side 19 facing the housing element 2 or the ventilation opening 4. This means that the base body 9, particularly on side 19, is curved at least in some areas. The curvature 24 is located centrally in the radial direction 15 of the base body 9, specifically on the base body itself. By means of the curvature 24, a jet of combustion gas and / or flame can be deflected outwards in the radial direction 15 or in the radial direction of the ventilation opening 4 upon impact with the curvature 24, thereby minimizing the force acting on the fire protection cover element 7. Furthermore, the combustion gases or the flame can be guided outwards in the radial direction to the ventilation area 11, in particular to the respective space 21.The 24 curvature, for example, is particularly good in . Fig. Figure 7 shows a schematic and perspective view of the fire protection cover element 7 from below. The curvature 24, for example, has a round, in particular circular, cross-section.

[0050] As in Fig.As shown in Figure 7, the base body 9, for example, has several indentations 26, which are spaced apart from the curvature 24 and extend particularly on side 19. These indentations 26 serve to stiffen the fire protection cover element 7. The indentations 26 are, for example, longitudinally shaped, extending particularly in the radial direction 15 of the fire protection cover element 7, in particular of the base body 9. The indentations 26 are, for example, evenly distributed in the circumferential direction 14. In particular, the indentations 26 are arranged further outwards in the radial direction 15 than the curvature 24. In particular, the indentations 26 project from the base body 9 on side 19.

[0051] Preferably, the fire protection cover element 7 is formed in one piece. For example, the fire protection cover element 7 is designed as a rapid prototyping component. This means that the fire protection cover element 7 is manufactured or is manufactured using rapid prototyping. For example, the fire protection cover element 7 is manufactured or is manufactured using selective laser sintering (SLS), in particular using SLS printing. Reference symbol list 1 electrical component 2 Housing element 3 Interior 4 ventilation openings 5 Environment 6 Pressure equalization element 7 Fire protection cover element 8 Mounting area 9 basic shapes 10 axial direction of the ventilation opening 11 Ventilation area 12 wall 13 Foundation wall 14 Circumferential direction 15 radial direction 16 Fastening element 17 Intake opening 18 Connection area 19 first page 20 second page 21 space 22 second position 23 Exit opening 24 Curvature 26. Stamping QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CN 220 653 225 U

[0002]

Claims

[1] Fire protection cover element (7) for an electrical component (1) of a motor vehicle, with at least one fastening area (8) by which the fire protection cover element (7) is to be held on a housing element (2) of the electrical component (1), with a base body (9) by means of which a ventilation opening (4) of the electrical component (1) can be at least partially covered, and with at least one ventilation area (11) for ventilating the electrical component (1) via the ventilation opening (4). [2] Fire protection cover element (7) according to claim 1, characterized by , that the fire protection cover element (7) can be arranged at least partially in the ventilation opening (4). [3] Fire protection cover element (7) according to claim 1 or 2, characterized by , that the fire protection cover element (7) can be positively connected via the fastening area (8) to a wall (12) of the housing element (2) which at least partially limits the ventilation opening (4). [4] Fire protection cover element (7) according to claim 3, characterized by , that the fastening area (8) has several fastening elements (16) projecting outwards in the radial direction (15) of the fire protection cover element (7) from the base body (9), by means of which the positive locking connection with the wall (12) can be formed. [5] Fire protection cover element (7) according to claim 4, characterized by , that in the circumferential direction (14) of the fire protection cover element (7) a respective gap (21) extends between the fastening elements (16). [6] Fire protection cover element (7) according to claim 5, characterized by , that the spaces (21) at least partially form the ventilation area (11). [7] Fire protection cover element (7) according to one of claims 4 to 6, characterized by , that • when the fire protection cover element (7) is placed in the ventilation opening (4), the fastening elements (16) are subjected to pressure from the housing element (2), which causes the fastening elements (16) to move relative to the base body (9) from a first position to a second position (22) that differs from the first position, in which the positive locking connection can be formed, and / or • the fastening elements (16) extend, particularly in the second position (22), at least substantially parallel to the base body (9), and preferably perpendicular to an axial direction (10) of the ventilation opening (4). [8] Fire protection cover element (7) according to one of the preceding claims, characterized by , that the base body (9) has a bulge (24) on a side facing the housing element (2), which is preferably arranged centrally in the radial direction (15) of the base body (7). [9] Electrical component (1) for a motor vehicle, comprising a housing element (2), a ventilation opening (4) and a fire protection cover element (7), which has at least one fastening area (8) by means of which the fire protection cover element (7) is held on the housing element (2), a base body (9) by means of which the ventilation opening (4) is at least partially covered, and at least one ventilation area (11) for ventilating the electrical component (1) via the ventilation opening (4). [10] Method for mounting a fire protection element (7) according to one of claims 1 to 8 on a housing element (2) of an electrical component (1) for a motor vehicle.

Images