Degassing unit, electronics housing with a degassing unit and its use

Abstract

Degassing unit (10) for an electronics housing (18), which has a base body (12) which can be connected in a fluid-tight manner to an edge of a pressure equalization opening (68) of the electronics housing (18) and which has at least one gas passage opening (46), - wherein the degassing unit (10) has a closure body (44) which, when a predetermined pressure difference between an interior space (14) of the electronics housing (18) and an environment (16) of the electronics housing (18) is exceeded, can be deflected from an initial position in a normal operating state of the degassing unit (10) in order to transfer the degassing unit (18) into an emergency degassing state in which the gas passage opening (46) is at least partially opened, - wherein, when a predetermined pressure difference between an interior space (14) of the electronics housing (18) and an environment (16) of the electronics housing (18) is undershot, the closure body (44) can be displaced back in such a way that the closure body (44) closes the gas passage opening (46) and the degassing unit (18) changes from the emergency degassing state to an emergency closure state, - characterized in that a particle separation device (30) is arranged upstream of the gas passage opening (46) on a flow path (54) which, in an assembled state, leads from the interior (14) of the electronics housing (18) into the environment, said particle separation device having at least one separation element (28a-c) with a mesh size (42) of at most 1.0 mm, and in that an emergency degassing mandrel (62) projects from the closure body (44) and the base body (12) has a gas-permeable membrane (56) for gas pressure equalization in the normal operating state, which membrane is arranged directly upstream of the emergency degassing mandrel (62) along the flow path (54).

Description

Technical area

[0001] The invention relates to a degassing unit for an electronics housing, comprising a base body connectable to an edge of a pressure equalization opening of the electronics housing and a closure body for a gas passage opening of the base body. The invention further relates to an electronics housing with such a degassing unit and its use. State of the art

[0002] Electronics housings, such as battery housings, are often equipped with a pressure equalization device to enable pressure equalization between the interior of the electronics housing and the surrounding environment. If the electronics housing were hermetically sealed, pressure differences could build up between the interior and the surrounding environment during operation of the electronics housing or a device arranged within the electronics housing, such as an electrochemical energy storage device. By enabling pressure equalization, the pressure equalization device prevents the electronics housing from experiencing mechanical failure during operation, for example, by the electronics housing bulging inward or outward or ultimately bursting.

[0003] In batteries or accumulators, especially high-voltage storage devices such as those used as traction batteries in electric vehicles, battery cell failure can occur, leading to a sharp increase in pressure and temperature inside the electronics housing. To prevent the electronics housing from bursting, the hot, highly pressurized gas must be quickly vented from the interior of the electronics housing to the environment.

[0004] WO 2011 / 161512 A1 discloses a pressure relief valve for a container, such as a motor vehicle battery, which can be arranged on such a container via a seal. The pressure relief valve allows gas exchange between the housing interior and the environment via a permeable membrane. In the event of a sudden pressure increase, the pressure relief valve is designed to open a flow path, bypassing the membrane by lifting a closure means for the duration of the overpressure.

[0005] DE 102019 100 094 A1 describes a degassing unit for an electronics housing. The degassing unit comprises a base body that can be fluid-tightly connected to an edge of a pressure equalization opening of the electronics housing. The base body has at least one gas passage opening that is covered by a membrane in a normal operating state of the degassing unit. The membrane is fluid-tightly mounted on a membrane carrier that can be displaced relative to the base body. In the normal operating state, the membrane carrier is pressed in a sealing manner against an edge of the gas passage opening of the base body by an axial force. When a predetermined pressure difference between an interior space and an environment is exceeded, the membrane carrier can be lifted off the base body, thereby releasing an emergency degassing opening that bypasses the membrane.

[0006] The two aforementioned pressure equalization devices or degassing units return to normal operating mode after an emergency degassing process by closing the pressure relief valve or pressing the membrane carrier against the edge. Gas exchange between the environment and the interior is therefore still possible through the gas passage opening. If the emergency degassing process was initiated due to a battery cell defect, oxygen from the environment can enter the interior of the electronics housing. This can promote the start or spread of a fire in a defective battery.

[0007] In addition, in practice, tiny parts, fragments, splinters, or particles are often created when battery cells fail. During emergency venting, such contaminants are transported in the escaping gas stream and deposited at the emergency vent opening. Furthermore, the contaminants are released into the environment during the emergency venting process, causing additional environmental pollution.

[0008] From EP 3 644 402 A1, a valve for pressure equalization or pressure overload reduction for a battery housing with two sections is known, wherein a thermally activated partial valve is provided which can shut off and / or close a pressure-equalizing and / or pressure-reducing fluid line between the two sections.

[0009] US 10 128 476 B2 describes a sealed battery with a valve and a safety mechanism when a critical internal pressure is exceeded.

[0010] From CN 1 12 310 552 A a battery with an explosion-proof valve is known, wherein the valve has a fire-retardant element and a gas-permeable membrane.

[0011] It is an object of the invention to improve the operational reliability of electronic housings after an emergency degassing process. Disclosure of the invention

[0012] The object is achieved by a degassing unit having the features specified in claim 1 and an electronics housing according to claim 18 or claim 19. Preferred embodiments are specified in the respective subclaims and the description. Degassing unit according to the invention

[0013] According to the invention, a degassing unit is provided for an electronics housing, in particular for a battery housing, in particular for a traction battery of a motor vehicle. The degassing unit comprises a base body, a closure body, and a particle separation device.

[0014] The base body can be a single piece or a multi-piece. The base body is preferably made of a heat-resistant and pressure-resistant material, in particular metal. Particularly preferably, the base body is formed as a deep-drawn sheet metal part. The base body of the pressure compensation device can typically be connected in a fluid-tight manner to an edge of a pressure compensation opening in the electronics housing. In other words, the degassing unit can be arranged on the housing wall of the electronics housing and / or inserted into the housing wall of the electronics housing without allowing a fluid, in particular gas, to flow between the base body and the housing wall.

[0015] The base body has at least one gas passage opening. When the degassing unit is mounted on the electronics housing, the gas passage opening is arranged at the pressure equalization opening. The gas passage opening can be arranged in the pressure equalization opening or adjacent to the pressure equalization opening. In other words, a flow path through which a fluid can flow runs through the pressure equalization opening and the gas passage opening.

[0016] The closure body is designed to close the flow path by covering the gas passage opening. The closure body's position relative to the base body or the gas passage opening is adjustable, in particular displaceable. Typically, the closure body is designed in the form of a flat, round disc. The closure body is preferably made of a heat-resistant and pressure-resistant material, in particular metal.

[0017] The particle separation device is positioned upstream of the gas passage opening on the flow path leading from the interior of the electronics housing to the environment. In other words, gas from the interior of the electronics housing first flows through the particle separation device and then through the gas passage opening. The particle separation device is designed to separate contaminants. For this purpose, the particle separation device has at least one separation element. According to the invention, this prevents contaminants from accumulating at the gas passage opening or at the contact point between the base body and the closure body during outflow. This prevents the closure body from becoming blocked by contaminants and enables the closure body to tightly close the gas passage opening. Furthermore, the escape of contaminants into the environment is prevented.The separation element, in particular the entire particle separation device, is preferably made of a heat-resistant and pressure-resistant material, in particular metal.

[0018] The separation element according to the invention is preferably positioned within the degassing unit along the flow path. The separation element can be arranged or formed on the degassing unit, in particular on the base body. The separation element generally extends over the entire flow cross-section and has meshes that divide the flow cross-section into partial flow cross-sections.

[0019] The meshes have a mesh size that determines the size of the contaminants to be separated. The meshes preferably have different main dimensions. In particular, the meshes can be rectangular, slot-shaped, or oval. The mesh size then represents the smallest flow diameter (the smallest main dimension) within a corresponding mesh. Preferably, a remaining flow diameter of a mesh (a largest main dimension) can be at least twice, particularly preferably at least five times, the mesh size. This promotes low flow resistance of the separation element while simultaneously achieving a high separation rate.

[0020] According to the invention, the separation element has a mesh size of at most 1.0 mm, preferably at most 0.9 mm. This mesh size is very effective for retaining fragments of failing batteries without excessively increasing flow resistance. In particular, contaminants such as electronic components or electronic fragments, especially battery fragments, can be effectively separated.

[0021] Typically, the mesh size of a separation element is predominantly uniform. Preferably, at least 60%, and particularly preferably at least 80%, of the meshes of a separation element have the same mesh size. This ensures homogeneous separation across the entire cross-section of the separation element.

[0022] Preferably, the meshes are predominantly rectangular or slot-shaped. In other words, the meshes preferably expose a predominantly rectangular or slot-shaped partial flow cross-section. This facilitates the simple manufacture of the separation elements.

[0023] According to the invention, the degassing unit can assume a normal operating state. This normal operating state is determined by the position of the closure body relative to the base body during proper operation of the electronics housing. In normal operating state, the closure body is in its initial position.

[0024] One possible normal operating state of the degassing unit can be that the flow path between the base body and the closure body is open (open normal operating state). In other words, the closure body does not seal off the base body through which flow can pass, or the gas passage opening, in this normal operating state. According to the invention, the gas passage opening in the base body located in the flow path is spanned by a membrane. The membrane is preferably selectively permeable. In principle, the membrane is permeable to gases. The membrane is preferably impermeable to liquids and solids. In normal operating state, the ingress of water into the housing can be prevented or at least reduced by the membrane. In this normal operating state, a (gas) flow can occur through the base body along the flow path.

[0025] An alternative possible normal operating state of the degassing unit can be that the flow path between the base body and the closure body is closed (closed normal operating state). In other words, in this case the closure body tightly closes the base body or the gas passage opening through which flow can occur during normal operating state. The ingress of gas and / or water into the housing can be prevented. In this normal operating state, no (gas) flow can occur through the base body along the flow path. For a degassing process at a defined pressure difference, the closure body can temporarily allow flow through the gas passage opening along the flow path. In some designs, this allows pressure peaks that arise inside the housing even during normal operation to be quickly reduced without the degassing unit switching to the emergency closure state.

[0026] When a predetermined pressure difference (which is greater than the pressure differences occurring during normal operation) between an interior of the electronics housing and a surrounding area of ​​the electronics housing is exceeded, the degassing unit switches to an emergency degassing state. During an emergency degassing process in the emergency degassing state, the closure body is initially deflected from its position in the normal operating state due to the increased gas pressure in the interior of the electronics housing, or is further distanced from the gas passage opening of the base body. In other words, the gas passage opening or the flow path is opened or widened by lifting the closure body from the gas passage opening. In the emergency degassing state, the closure body is deflected from its position in the normal operating state.

[0027] During the emergency degassing state, gas flows from the interior of the electronics housing into the environment. The escaping gas typically contains contaminants, such as particles or microelements from electronic components, especially batteries, especially traction batteries of motor vehicles, which have been caused by the destruction of the electronic components, especially the batteries, as a result of an electronic defect, especially a battery defect.

[0028] According to the invention, the degassing unit is configured to transition to an emergency closure state after an emergency degassing process, in which the closure body closes the gas passage opening of the base body. The degassing unit is transferred to the emergency closure state by relocating the closure body when the pressure difference between an interior of the electronics housing and an environment of the electronics housing falls below a predetermined level after the emergency degassing process, so that the closure body closes the gas passage opening.

[0029] The predetermined pressure difference at which the closure body is relocated to transfer the degassing unit from the emergency degassing state to the emergency closure state may differ from the predetermined pressure difference at which the degassing unit is transferred from the normal operating state to the emergency degassing state by relocating the closure body. In particular, dynamic pressure components caused by the flow occurring during the emergency degassing process sometimes play a significant role when relocating the closure body from the emergency degassing state to the emergency closure state.

[0030] If, after the emergency degassing process, the pressure difference drops below the predetermined value for transferring the degassing unit from the emergency degassing state to the emergency closure state, the closure body switches to the emergency closure state and remains there, even if the pressure difference is no longer acting on it. However, the degassing unit can still quickly reduce any subsequent pressure peaks by temporarily reopening the closure body at a defined pressure difference.

[0031] In other words, in the emergency closure state, the closure body prevents any flow through the base body or the gas passage opening, and thus the degassing unit. By sealing the base body in the emergency closure state, preventing any flow through it, the ingress of oxygen—be it in the form of molecular oxygen from the ambient air or in the form of gaseous or liquid water—through the degassing unit is prevented after the emergency degassing process has been completed. A fire that is starting or has already started in the electronics housing is thus cut off from the supply of the oxidizing agent required for combustion. This can prevent the fire from starting or extinguish it.

[0032] In other words, the degassing unit according to the invention has a valve arrangement connected in series with the pressure equalization opening, which is formed with the closure body. In normal operating mode, the valve arrangement can be open, i.e., allowing flow through, or closed, i.e., preventing flow through. During an emergency degassing process, the valve arrangement is open. In embodiments in which the valve arrangement is closed during normal operation, the valve arrangement can be opened upon exposure to pressures typically encountered during operation in order to reduce pressure peaks occurring inside the housing without the degassing unit thereby switching to the emergency closure state.

[0033] The particle separation device is designed to separate contaminants contained in the outflowing fluid that could prevent the closure body from sealing the gas passage opening in the emergency closure state. In the emergency closure state, which is automatically established by the degassing unit according to the invention after completion of the emergency degassing process, no flow passes through the valve assembly. In the emergency closure state, the base body or the gas passage opening is tightly closed by the closure body.

[0034] The emergency degassing process is typically characterized by a high volume flow, high pressure, and / or high temperature of the escaping gas. The membrane can be damaged during the emergency degassing process. Since the closure element tightly seals the base body after the emergency degassing process is completed, there is no risk of gases, liquids, or solids entering the housing.

[0035] The closure body is preferably preloaded against the base body, preferably counter to the direction of the flow path leading from the interior of the electronics housing or battery housing to the environment in the assembled state.

[0036] This ensures particularly reliable sealing of the base body in the emergency closure state by the closure body. A spring element can be provided to preload the closure body against the base body. The spring element can be a preferably cylindrical coil spring. The spring element can be supported on a protective cover of the degassing unit.

[0037] The protective hood is typically held on the base body. Preferably, the protective hood is made of a heat-resistant and pressure-resistant material, in particular metal. Particularly preferably, the protective hood is designed as a deep-drawn sheet metal part. The protective hood has at least one ventilation opening. The at least one ventilation opening is typically formed on the circumference of the protective hood. Preferably, the protective hood has a plurality of ventilation openings that are evenly distributed over the circumference of the protective hood. Such a protective hood can also be provided if the degassing unit does not have a spring element. The protective hood can have fastening means, for example screw-on fastening tabs, for arrangement on the electronics housing. In this case, the base body can be fastened indirectly to the electronics housing via the protective hood.

[0038] In the emergency closure state, the gas passage opening can preferably be completely closed by the closure body. The closure body is pressed, in particular by an axial force, against a circumferential axial sealing surface forming an edge of the gas passage opening of the base body. The axial force is preferably generated by the at least one spring element.

[0039] In the (closed) normal operating state, the gas passage opening can be completely closed by the closure body. In this case, the closure body can be pressed by an axial force against a circumferential axial sealing surface forming an edge of the gas passage opening of the base body. The sealing surface can be formed on a seal, which is preferably held on the base body.

[0040] In a preferred embodiment of the degassing unit, in the (open) normal operating state, the closure body is spaced from the base body at least in some areas by a spacer. The degassing unit can have the spacer, for example, between the closure body and the base body. This prevents the gas passage opening from closing completely, thus enabling gas exchange in the normal operating state. The spacer is designed or arranged on the base body in such a way that it loses its effectiveness during an emergency degassing process, so that the closure body can come into sealing contact with the base body in the emergency closure state.

[0041] Particularly preferably, the spacer is held on the closure body in the normal operating state and has a predetermined separation point designed to separate the closure body from the spacer in the emergency degassing state. Preferably, the spacer is arranged between the protective hood and the closure body, in particular coaxially to the spring element. More preferably, the spacer penetrates a through-hole in the protective hood. This enables the closure body to be guided by the spacer when the closure body is deflected. The spacer can particularly preferably have a stop on an outer side of the protective hood, which limit the movement of the closure body in the direction of the base body. Preferably, the spacer is interlocked with the protective hood by a securing means, wherein the securing means has the stop.

[0042] The predetermined separation point can be designed for separation as a result of mechanical and / or thermal stress.

[0043] Preferably, the predetermined separation point can be formed as a notch in the spacer, wherein the notch breaks under pressure from the escaping gas during the emergency degassing process.

[0044] Particularly preferably, the predetermined separation point is designed as a connecting means by which the closure body is held to the spacer, wherein the connecting means loses its connecting ability at a temperature of at most 250°C, preferably at most 200°C, particularly preferably at most 150°C. The spacer is preferably made of such a material. The aforementioned temperatures can in particular characterize a softening temperature or a melting temperature. This can be achieved in a simple manner that, during an emergency degassing process in which hot gases flow out of the interior of the housing, the predetermined separation point loses its strength at least to the extent that the spacer is no longer able to hold the closure body.

[0045] In the emergency closure state, the closure body of the degassing unit according to the invention can rest continuously all the way around the base body in order to tightly close it. For this purpose, the base body can have at least one sealing element that can be held, for example, in a groove. The sealing element can seal the base body particularly reliably in the emergency closure state. The sealing element is preferably arranged in the flow shadow of a holding structure, for example a groove wall. Damage to the sealing element by hot gas flowing through the pressure compensation device during an emergency degassing process can thus be limited to the extent necessary to fulfill the function or, in the best case, completely avoided. The sealing element is particularly preferably made of a heat-resistant material, in particular of a silicone or a fluororubber.This can further prevent damage to the sealing element.

[0046] The degassing unit according to the invention has an emergency degassing mandrel. The emergency degassing mandrel protrudes from the closure body toward the membrane. During an emergency degassing process, the membrane is deflected toward the emergency degassing mandrel due to the strong and rapid pressure increase in the interior of the electronics housing, which destroys it. By destroying the membrane, the flow resistance of the degassing unit is reduced, allowing the emergency degassing process to proceed particularly quickly.

[0047] In a preferred embodiment of the degassing unit, the particle separation device has at least one additional separation element, preferably at least two additional separation elements. The separation elements are preferably connected in series in terms of flow. The mesh size of the separation elements preferably decreases along the flow path leading from the interior of the battery housing into the environment. This can increase the separation efficiency of the particle separation device. In some embodiments, the base body forms at least one of the separation elements. Alternatively or additionally, at least one of the separation elements can be attached to the base body.

[0048] The particle separation device preferably has at least one separation element for depth filtration. The mesh size of the separation element for depth filtration is preferably at most 0.5 millimeters, preferably at most 0.3 millimeters. Further preferably, the separation element for depth filtration is arranged downstream of the other separation elements on the flow path leading from the interior of the battery housing to the environment. This allows the separation efficiency of the particle separation device to be further improved. The separation element for depth filtration can comprise, for example, a metal fiber fleece and / or a metal foam.

[0049] The degassing unit can be designed as a single structural unit. Typically, in a state of the degassing unit prior to being arranged on the electronics housing, the structural unit has a fixed assembly of its components (e.g., base body, particle separation device, seals, protective cover, closure body, spring element, and / or membrane). The components of the structural unit are held together at least captively, in particular, are permanently connected to one another. In other words, the individual components of the degassing unit are held together in such a way that the structural unit can be arranged on the electronics housing as a single piece. This simplifies the assembly of the degassing unit on the electronics housing.

[0050] In a preferred embodiment, the degassing unit comprises several, particularly preferably two, structural units. When the degassing unit is arranged on the electronics housing, one of the structural units is preferably arranged as an external part predominantly outside the electronics housing, and one of the structural units is arranged as an internal part predominantly inside the electronics housing. This allows the required space requirement of the degassing unit to be flexibly adapted to the available installation space inside and outside the electronics housing.

[0051] Preferably, the outer part is designed for placement at the pressure equalization opening on an outer side of the housing wall, and the inner part is designed for placement at the same pressure equalization opening on an inner side of the housing wall. Typically, the outer part and / or the inner part are arranged fluid-tight on the housing wall. Preferably, the inner part extends completely beyond the pressure equalization opening of the electronics housing in the radial direction. This can increase the sealing effect of the degassing unit, since excess pressure in the interior of the electronics housing causes the inner part to be pressed against the housing wall.

[0052] Further preferably, when the degassing unit is arranged on the electronics housing, the outer part and the inner part form the flow path through the degassing unit. In other words, the outer part is arranged fluidically downstream of the inner part on the flow path. This further improves the flexibility of the degassing unit with respect to its arrangement on the electronics housing.

[0053] When the degassing unit is mounted on the electronics housing, the outer part or the inner part preferably engages, in particular passes through, the pressure equalization opening of the electronics housing. Particularly preferably, both the outer part and the inner part engage in the pressure equalization opening of the electronics housing. This allows for optimal use of the available installation space.

[0054] Further preferably, the outer part can be arranged on the inner part, in particular in a fluid-tight manner. Typically, the outer part and the inner part are held together. In this case, the degassing unit, after being arranged on the electronics housing, forms a multi-part base body that passes through or projects through the pressure equalization opening. The parts of the base body are arranged directly next to one another after the structural units have been arranged on the electronics housing. This is advantageous with regard to sealing the degassing unit from the housing wall. Furthermore, one of the structural units can be attached to the electronics housing by means of the other structural unit, thereby reducing the number of fastening elements.

[0055] Alternatively, the structural units can each be individually designed for attachment to the housing wall of the electronics housing. In this case, the base body of the degassing unit is constructed in multiple parts. When the degassing unit is mounted on the electronics housing, the base body, or parts of the base body, are arranged on both the side of the housing wall of the electronics housing facing the interior and the side facing the environment. The parts of the base body can only be arranged indirectly to one another.

[0056] The structural units preferably comprise the components of the degassing unit according to their functional relationship. For example, the structural units can each comprise the components related to the subfunctions "separating particles" and "closing the gas passage opening" of the degassing unit. Typically, the outer part has the gas passage opening and the contact surface with the closure body (subfunction "closing the gas passage opening"). Typically, the particle separation device is arranged and / or formed within the inner part on the base body (subfunction "separating particles"). Preferably, a separation element of the particle separation device is formed on the base body part of the inner part. This can simplify the arrangement of the multiple structural units on the electronics housing. Electronics housing according to the invention

[0057] The present invention further includes an electronics housing, in particular a battery housing, in particular for a traction battery of a motor vehicle, comprising a degassing unit according to the invention. The degassing unit is typically arranged on a housing wall of the electronics housing. The base body is typically held on the housing wall. The housing wall can have a through-hole into which the base body can be inserted. In particular, it can be provided that the base body extends through the housing wall. Electrochemical energy storage cells are preferably arranged in the battery housing. In this respect, the invention also relates to a battery. The energy storage cells can be lithium-ion cells.

[0058] The degassing unit can comprise several, in particular two, structural units. A first structural unit with the closure body is preferably arranged on the outside of the electronics housing. A second structural unit with the particle separation device is preferably arranged on the inside of the electronics housing. The two structural units can each be fluid-tightly attached to the electronics housing. Degassing process

[0059] To further explain the present invention, a method for degassing an electronics housing, in particular a battery housing, in particular for a traction battery of a motor vehicle, is described below. The electronics housing has a degassing unit according to the invention as described above. The electronics housing is therefore an electronics housing according to the invention as described above.

[0060] In a first step of the method, a gas exchange is carried out between the interior of the housing and the environment. The degassing unit according to the invention is in the open normal operating state. The gas exchange takes place through the particle separation device, the membrane, and between the closure body and the base body. In other words, the gas flows along the flow path for pressure equalization, which is open between the closure element and the base body in this normal operating state of the pressure equalization device. Alternatively, it can be provided that the degassing unit is in the closed normal operating state, and gas exchange is prevented.Furthermore, it is possible for the degassing unit to be closed during normal operation and to open when pressure differences typically occur during normal operation to quickly reduce this pressure, but without entering an emergency opening state. This function can always be used if the actual pressure difference remains below the "predetermined pressure difference" for transition to the emergency degassing state.

[0061] In a second step, an emergency degassing process is performed. During the emergency degassing process, hot gas under high pressure can escape from the interior of the electronics housing into the environment at a high volume flow. The gas can carry contaminants, such as particles and / or tiny fragments of the electronics located in the electronics housing. The particle separation device separates the entrained contaminants before they flow through the gas passage opening, thus preventing the contaminants from accumulating at the contact point between the base body and the closure body. During the emergency degassing process, the membrane can be destroyed. This can facilitate the escape of the gas from the interior.

[0062] In a third step, the gas passage opening is closed by the closure body. In other words, the degassing unit enters the emergency closure state. By tightly closing the base body or the gas passage opening, gases and / or liquids, particularly oxygen-containing gases or liquids, can be prevented from flowing into the housing. If the emergency degassing process was triggered by a defect in the electrochemical energy storage cells arranged in the electronics housing, sealing the electronics housing can prevent the outbreak of a fire or extinguish an existing fire.

[0063] If the closure body is preloaded against the base body, it can be lifted from the base body during the emergency degassing process. This can be done against the action of a spring element that preloads the closure body. By lifting the closure body further from the base body, a particularly large flow cross-section can be released to facilitate the emergency degassing process.

[0064] If the closure body is spaced from the base body by a spacer in the open, normal operating state, the spacer can be destroyed during the emergency venting process. As a result, the spacer loses its effectiveness, so that the closure body can come into sealing contact with the base body in the emergency closure state after the emergency venting process has been completed. Destruction of the spacer is understood in particular to mean that it loses its shape and / or strength at least to the extent that it is no longer able to keep the closure body at a distance from the base body. Preferably, a predetermined separation point of the spacer is broken and / or melted during the emergency venting process. Short description of the drawings

[0065] Further features and advantages of the invention will become apparent from the following detailed description of exemplary embodiments of the invention, the patent claims, and the figures of the drawing, which illustrate details of the invention. The aforementioned and further detailed features can be implemented individually or in combination in any desired, expedient combinations in variants of the invention. The features shown in the drawing are presented in such a way that the special features of the invention can be clearly seen. The drawing shows: Fig. 1a shows a degassing unit according to the invention as a single structural unit with a base body and a particle separation device, in a schematic perspective view of a side facing an electronics housing in the installed state; Fig. 1b the degassing unit of Fig. 1a in a schematic perspective view of a side facing away from the electronics housing in the installed state; Fig. 1c shows a separating element of a particle separating device for a degassing unit according to the invention, in a partial schematic plan view; Fig. 2a the degassing unit of Fig. 1a and Fig. 1b in a normal operating state in which the degassing unit opens a flow path for pressure equalization, in a schematic sectional view; Fig. 2b the degassing unit of Fig. 2a in an enlarged, partial sectional view; Fig. 3a the degassing unit of Fig. 1a and Fig. 1b during an emergency venting process, in which escaping gas lifts the closure element further away from the base body against the action of a spring element, in a schematic sectional view; Fig. 3b the degassing unit of Fig. 3a in an enlarged, partial sectional view; Fig. 4a the degassing unit of Fig. 1a and Fig. 1b in an emergency closure state in which the gas exchange is prevented by the degassing unit, in a schematic sectional view; Fig. 4b the degassing unit of Fig. 4a in an enlarged, partial sectional view; Fig. 5 shows a further degassing unit with two structural units before arrangement on an electronics housing in a schematic, perspective sectional view; Fig. 6 an electronics housing according to the invention, on which the further degassing unit of Fig. 5 is arranged in a schematic, perspective sectional view. Fig. 7 a further electronics housing, on which a further degassing unit is arranged as a single structural unit, in a schematic sectional view. Embodiments of the invention

[0066] Fig. 1a and Fig. 1b shows a first embodiment of a degassing unit 10. The degassing unit 10 is designed as a single structural unit and has a base body 12. The base body 12 is formed in one piece here.

[0067] The degassing unit 10 serves for gas exchange between an interior 14 and an environment 16 of an electronics housing 18, compare Fig. 5. The base body 10 is for this purpose integrated into a housing wall 20 ( Fig. 5) of the housing 18. A seal 22 ensures that the gas exchange during degassing takes place through the degassing unit 10 and not past it. In other words, the space between the housing wall 20 ( Fig. 5) and the degassing unit 10 are sealed fluid-tight by the seal 22.

[0068] The base body 12 has a cylindrical hollow body portion 24 and a crown portion 26. In the present embodiment, the hollow body portion 24 of the base body 12 forms a separation element 28a of a particle separation device 30 of the degassing unit 10.

[0069] In the present embodiment, the degassing unit 10 has a protective hood 32. The protective hood 32 serves to protect the degassing unit 10. In other words, the protective hood 32 prevents unintentional or unwanted access to the interior of the degassing unit 10. In addition, the interior of the degassing unit 10, in particular the base body 12, is protected from macroscopic contaminants from the environment 16 ( Fig. 5). The protective hood 32 has at least one, here several, ventilation openings 34. The ventilation openings 34 can be distributed over a circumference of the protective hood 32.

[0070] The protective hood 32 is held on the base body 12 or the rim section 26. The protective hood 32 engages the rim section 26 of the base body 12 by means of several hooks 36 (where, for reasons of clarity, only one hook 36 is provided with a reference symbol). The hooks 36 of the protective cap 32 are preferably formed by plastic forming during the manufacture of the degassing unit 10 when the protective cap 32 is arranged on the base body 12. This achieves a particularly favorable and secure connection of the protective hood 32 to the base body 12.

[0071] The degassing unit 10 has fastening tabs 38, which in the present embodiment are formed on the protective cover 32. The fastening tabs 38 serve to fasten the degassing unit 10 to the electronics housing 18 ( Fig. 5) using conventional fastening means, in particular screws (not shown). In other words, the base body 12 is indirectly attached to the electronics housing 18 ( Fig. 5) attached.

[0072] The separation element 28a has a plurality of meshes 40 which are structured in the separation element 28a and are evenly distributed over the surface of the separation element 28a.

[0073] Fig. Fig. 1c shows an enlarged partial section of an exemplary embodiment of a separation element 28a, as it is also used in the degassing unit 10 according to the Fig. 1a and Fig. 1b can be used. The separation element 28a has meshes 40 with a mesh width 42 (where, for reasons of clarity, only three meshes 40 and three mesh widths 42 are provided with a reference symbol). The mesh width 42 can be 0.8 mm. The meshes 40 in this case have a predominantly rectangular cross-section. The meshes 40 therefore each release a predominantly rectangular flow cross-section, wherein the mesh width 42 for each mesh 40 refers to the smallest flow diameter in the flow cross-section. In the present embodiment, all meshes 40 have the same mesh width 42.

[0074] Fig. 2a shows the degassing unit from the Fig. 1a and Fig. 1b in a sectioned side view. Fig. 2b shows an enlarged section X of the degassing unit from Fig. 2a.

[0075] A closure body 44 is arranged between the base body 12 and the protective hood 32. The closure body 44 is designed to completely close a gas passage opening 46. The closure body 44 is preloaded by a spring element 48, here a cylindrical coil spring, which bears against the protective hood 32.

[0076] In Fig. 2a and Fig. 2b, the degassing unit 10 is in an open normal operating state, which allows pressure equalization between the interior space 14 ( Fig. 5) and surrounding area 16 ( Fig. 5). A spacer 50, here a hollow cylindrical sleeve, is held at one end on the closure body 44. At the other end, the spacer 50 extends through the protective hood 32 and is interlocked by a locking pin 52 on a side of the protective hood 32 facing away from the closure body 44. In normal operating conditions, the locking pin 52 acts as a stop on the side of the protective hood 32 facing away from the closure body 44. This prevents the closure body 44 from deflecting in the direction of the base body 12 as a result of the spring force of the spring element 48. The spacer 50 is formed coaxially with the spring element 48 here.

[0077] The gas passage opening 46 of the base body 12 is unclosed due to the spacer 50, thereby opening a flow path 54 between the closure body 44 and the base body 12. The gas passage opening 46 is spanned by a selectively permeable membrane 56. The membrane 56 is permeable to gases. Liquids and solids are retained by the membrane 56. The gas passage opening 46 is formed here as a single, continuous opening. The gas passage opening 46 can also be divided into several partial openings, in particular in a grid-like manner. The membrane 56 can then rest against webs between the partial openings.

[0078] For pressure equalization, gas can flow along the flow path 54 through the particle separation device 30, the membrane 56, the gas passage opening 46, between the closure body 44 and the base body 12, and through the ventilation openings 34 in the protective hood 32. In this way, gas exchange is possible both from the electronics housing 18 and from the environment 16 into the electronics housing 18.

[0079] In addition to the separation element 28a formed in the cylindrical hollow body section 24, the particle separation device 30 has a further separation element 28b, which is arranged below the gas passage opening 46 on the rim section 26 of the base body 12. The separation element 28b can be identical to the separation element 28a with regard to the design of the meshes 40. Preferably, the separation element 28b has a smaller mesh size 42 than the separation element 28a, for example, 0.5 mm.

[0080] The base body 12 has a heat-resistant seal 58. The heat-resistant seal 58 is ring-shaped and circumferentially closed. The heat-resistant seal 58 and the base body 12 are permanently connected to one another.

[0081] The base body 12 has a continuous, closed flanged edge 60 extending around the circumference, which protrudes from the rim portion 26 and engages behind the heat-resistant seal 58, pointing radially inward. In other words, the heat-resistant seal 58 is gripped by the flanged edge 60 at its radially outer edge. According to the present embodiment, the separation element 28b and the selectively permeable membrane 56 are also gripped by the flanged edge 60. This allows a clamping connection between the aforementioned components to be achieved in a particularly advantageous manner with just one flanging process.

[0082] The degassing unit 10 is designed as a single structural unit. In the embodiment shown, all components of the degassing unit (base body 12, particle separation device 30, protective hood 32, closure body 44, spring element 48, spacer 50, locking pin 52, membrane 56, and heat-resistant seal 58) form a solid assembly, i.e., they are held together in a manner that prevents them from being lost. Furthermore, the components are inseparable, i.e., they cannot be removed without causing damage.

[0083] Fig. 3a and Fig. 3b show the degassing unit 10 in an emergency degassing state during an emergency degassing process, wherein Fig. 3b shows the enlarged section X of the degassing unit Fig. 3a shows. During the emergency degassing process, hot gas flows out of the electronics housing 18 under high pressure and with a large volume flow (see Fig. 5). The closure body 44 is thereby further spaced from the base body 12, counter to the spring force of the spring element 48. This opens up a larger flow cross-section. This reduces the flow resistance of the degassing unit 10. The emergency degassing process can be carried out quickly.

[0084] The deflection of the closure body 44 can be guided by the spacer 50.

[0085] The escaping gas may contain contaminants (not shown), such as fragments, splinters, and / or particles, which are retained by the separation elements 28a, 28b of the particle separation device 30. In other words, the contaminants are prevented from entering the environment 16 or from accumulating on the contact surfaces between the closure body 44 and the base body 12 or the heat-resistant seal 58. This ensures that the degassing unit 10 can be properly sealed in a fluid-tight manner in a downstream emergency closure state of the degassing unit 10.

[0086] At the beginning of the emergency degassing process, the membrane 56 is pressurized by the increasing pressure in the interior 14 ( Fig. 5) of the electronics housing 18 ( Fig. 5) and pressed against an emergency degassing mandrel 62. This destroys the membrane 56 (in the Fig. 3a and Fig. 3b (now shown as an opening). This further reduces the flow resistance of the degassing unit 10. The emergency degassing mandrel 62 protrudes from the closure body 44 to the membrane 56.

[0087] During the emergency degassing process, a predetermined separation point 64 of the spacer 50 is destroyed, whereby the closure body 44 is separated from the spacer 50 having the locking pin 52. Here, the predetermined separation point 64 of the spacer 50 consists of a connecting means at the contact surface between the spacer 50 and the closure body 44, which has a melting point of less than 200°C, for example an adhesive. Due to the hot gas flowing out of the housing 18, the connecting means of the predetermined separation point 64 is heated during the emergency degassing process and loses its connecting ability. The closure body 44 is separated from the spacer 50. Alternatively, it can be provided that the predetermined separation point 64 is formed, for example, as a notch (not shown) in the spacer 50 and that separation occurs as a result of the pressurization of the flowing gas.It may also be provided that parts of the spacer 50 remain on the closure body 44 after separation.

[0088] Fig. 4a and Fig. 4b show the degassing unit 10 after completion of the emergency degassing process, where Fig. 4b shows the enlarged section X of the degassing unit Fig. 4a shows. The degassing unit 10 is now in an emergency closure state. After reducing the excess pressure in the interior 14 ( Fig. 5) of the electronics housing 18 ( Fig. 5), the spring element 48 presses the closure body 44 against the base body 12 or the heat-resistant seal 58. The closure body 44 closes the gas passage opening 46 of the base body 12 in a fluid-tight manner. For this purpose, the closure body 44 can be in continuous contact with the heat-resistant seal 58 of the base body 12. An inflow of substances, in particular liquids or gases, from the environment 16 ( Fig. 5) into the interior 14 ( Fig. 5) of the electronics housing 18 ( Fig. 5) through the degassing unit 10 is no longer possible. Also, the escape of gas from the interior 14 ( Fig. 5) into the surrounding area 16 ( Fig. 5) is not possible as long as the pressure in the interior 14 ( Fig. 5) is not sufficient to lift the closure body 44 against the action of the spring element 48 from the base body 12 or the heat-resistant seal 58. If the pressure in the interior 14 ( Fig. 5) becomes large enough, pressure equalization to the outside is also possible in the emergency closure state by temporarily lifting the closure body 44 from the heat-resistant seal 58.

[0089] The spacer 50 can be in the emergency closure state in its initial position (see Fig. 2a and Fig. 2b), but is now separated from the closure body 44 and arranged at a distance from it.

[0090] Fig. 5 shows a second embodiment of a degassing unit 10 without membrane 56 and emergency degassing mandrel 62 prior to arrangement on an electronics housing 18. The electronics housing 18 has a pressure equalization opening 68 in the housing wall 20.

[0091] The degassing unit 10 here has several, namely exactly two, structural units and a multi-part base body 12. In the present case, the structural units are designed as an inner part 70 and an outer part 72. The inner part 70 and the outer part 72 can each be connected to the edge of the pressure equalization opening 68 of the electronics housing 18 via the base body 12. For this purpose, the inner part 70 and the outer part 72 each comprise at least a part of the multi-part base body 12. For a fluid-tight arrangement between the housing wall 20 and the base body 12, in the embodiment shown, both the inner part 70 and the outer part 72 each have a seal 22. It can also be provided that only the inner part 70 or the outer part 72 has the seal 22.

[0092] The separation element 28a is formed in the hollow body portion 24 of the base body 12. In the embodiment shown, the hollow body portion 24, at its end facing the housing wall 20, encompasses a flanged portion 74 of the base body 12, which is designed to penetrate the pressure equalization opening 68. The seal 22 is arranged on the circumference of the flanged portion 74.

[0093] The portion of the base body 12 adjacent to the outer part 72 is ring-shaped. On a side of the outer part 72 facing the housing wall 20, the seal 22 is arranged within a circumferential groove of the base body 12. On a side of the base body 12 facing away from the housing wall 20, the outer part 72 has the heat-resistant seal 58, which is arranged in a further circumferential groove of the base body 12. The heat-resistant seal 58 protrudes from the base body 12 and toward the closure body 44. This ensures that the closure body 44 rests circumferentially against the heat-resistant seal 58 in the closed state. In the present embodiment, an additional heat-resistant auxiliary seal 76 is provided in addition to the heat-resistant seal 58.The heat-resistant auxiliary seal 76 is designed here with smaller cross-sectional dimensions and is arranged radially further inward on the base body 12 than the heat-resistant seal 58. This can increase the sealing effect.

[0094] The degassing unit 10 also has a protective hood 32 with ventilation openings 34. The protective hood 32 surrounds the base body of the outer part 72 at its periphery. The protective hood 32 has fastening tabs 38 designed for directly fastening the protective hood 32 to the housing wall 20. The outer part 72 is fastened to the housing wall 20 via the protective hood 32. The base body of the outer part 72 is fastened indirectly to the housing wall 20 via the protective hood 32.

[0095] The base body part of the inner part 70 has a fastening eyelet 78 for direct attachment to the housing wall 20 of the electronics housing 18. The fastening eyelet 78 is formed here on the hollow body section 24 of the base body 12.

[0096] The particle separation device 30 and the main body part of the inner part 70 are held together at least in a captive manner. Furthermore, the main body 12 or the main body part of the inner part 70 and the particle separation device 30 are held together inseparably, i.e., they cannot be removed without destruction. The inner part 70 is designed for placement on an inner side of the electronics housing 18 with respect to a degassing direction from the interior space 14 into the surroundings 16 of the electronics housing 18.

[0097] The protective hood 32, the closure body 44, the spring element 48, the heat-resistant seal 58, the heat-resistant auxiliary seal 72, and the main body part of the outer part 72 are held together at least captively. The main body 12 or the main body part of the outer part 72 and the protective hood 32 are furthermore inseparably, i.e., cannot be removed non-destructively. The closure body 44, the spring element 48, the heat-resistant seal 58, and the heat-resistant auxiliary seal 72 components are enclosed between the main body part of the outer part 72 and the protective hood 32. The outer part 72 is designed for arrangement on an outer side of the electronics housing 18 with respect to a degassing direction from the interior 14 into the environment 16 of the electronics housing 18.

[0098] Fig. 6 shows the electronics housing 18 with the degassing unit 10 from Fig. 5 in an assembled state (fastening means not shown). The degassing unit 10 is in a closed normal operating state, which does not allow any gas exchange between the interior 14 and the environment 16. The closure body 44 is pressed by means of the spring element 48 against the heat-resistant seal 58 and the heat-resistant auxiliary seal 76 of the base body 12 on the outer part 72. As a result, the gas passage opening 46 of the base body 12 and thus a possible flow path 54 (see Fig. 2a and Fig. 2b) closed.

[0099] A pressure increase in the interior 14 of the electronics housing 18 causes the closure body 44 to lift off from the base body 12 or from the heat-resistant seal 58.

[0100] The closure body 44 is deflected away from the base body 12 against the spring force of the spring element 48. As a result of the deflection of the closure body 44, a flow path 54 is created (see Fig. 2a and Fig. 2b) between the base body 12 and the closure body 44, through which hot gas can escape from the electronics housing 18. Contaminants entrained in the escaping gas are effectively retained by the particle separation device 30 or the separation element 28a on the inner part 72. This effectively prevents the contaminants from escaping into the environment 16 or from depositing on the heat-resistant seal 58, the heat-resistant auxiliary seal 76, and / or the contact surface of the closure body 44. This ensures that the degassing unit 10 can transition to a fluid-tight emergency closure state after the emergency degassing process.

[0101] Since gas exchange is not provided for in the normal operating state of the degassing unit 10, a selectively permeable membrane 56 (see Fig. 2a and Fig. 2b) and an emergency degassing mandrel 62 (see Fig. 3a). Furthermore, a spacer 50 can be omitted, since the illustrated embodiment changes from the closed normal operating state to a closed emergency closure state during an emergency degassing process.

[0102] Fig.7 shows a further embodiment of an electronics housing 18 with a further embodiment of a degassing unit 10 in an assembled state (fastening means not shown). The degassing unit 10 is designed as a single structural unit. The degassing unit 10 is in an emergency degassing state during an emergency degassing process. During the emergency degassing process, gas exchange between the interior 14 and the environment 16 is permitted. The closure body 44 is lifted off the heat-resistant seal 58 of the base body 12 by the pressure in the interior 14 against the spring force of the spring element 48 and pressed against the protective hood. As a result, the gas passage opening 46 of the base body 12 and thus the flow path 54 are opened.

[0103] The base body 12 is arranged at the edge of the pressure equalization opening 68 of the electronics housing 18. The edge of the pressure equalization opening 68 has a chamfer on which the seal 22 of the degassing unit 18 is positioned. In the embodiment shown, the base body 12 is formed in one piece.

[0104] In the embodiment shown, the particle separation device 30 comprises, in addition to the separation elements 28a and 28b, a separation element 28c for depth filtration. In the embodiment shown, the separation element 28c for depth filtration is arranged between the separation elements 28a and 28b, which fix the separation element 28c for depth filtration in its position within the degassing unit 10. This allows a degassing unit to be particularly easily equipped with a separation element 28c for depth filtration without having to make any design changes. It could also be provided that the separation element 28c for depth filtration is arranged downstream of the separation elements 28a and 28b on the flow path 54 from the interior 14 to the environment 16 (not shown in detail). List of reference symbols 10 Degassing unit 12 basic bodies 14 Interior 16 Surroundings 18 electronics housings 20 Housing wall 22 Seal 24 Hollow body section of the base body 12 26 Crown section of the base body 12 28a, 28b, 28c Separation elements 30 particle separation device 32 protective cover 34 ventilation openings 36 Hook of the protective cover 32 38 mounting tabs 40 stitches 42 mesh size 44 locking bodies 46 Gas passage opening 48 spring element 50 spacers 52 locking pin 54 Flow path 56 membrane 58 Heat-resistant seal 60 flanged edge 62 Emergency degassing mandrel 64 Predetermined separation point 68 Pressure equalization opening 70 Inner part of the base body 12 72 Outer part of the base body 12 74 nozzle section 76 Heat-resistant auxiliary seal 78 Mounting eyelet

Claims

[1] Degassing unit (10) for an electronics housing (18), which has a base body (12) which can be connected in a fluid-tight manner to an edge of a pressure equalisation opening (68) of the electronics housing (18) and which has at least one gas passage opening (46), - wherein the degassing unit (10) has a closure body (44) which, when a predetermined pressure difference between an interior space (14) of the electronics housing (18) and an environment (16) of the electronics housing (18) is exceeded, can be deflected from an initial position in a normal operating state of the degassing unit (10) in order to transfer the degassing unit (18) into an emergency degassing state in which the gas passage opening (46) is at least partially opened, - wherein, when a predetermined pressure difference between an interior space (14) of the electronics housing (18) and an environment (16) of the electronics housing (18) is undershot, the closure body (44) can be displaced back in such a way that the closure body (44) closes the gas passage opening (46) and the degassing unit (18) changes from the emergency degassing state to an emergency closure state, - characterized byin that a particle separation device (30) is arranged upstream of the gas passage opening (46) on a flow path (54) which, in an assembled state, leads from the interior (14) of the electronics housing (18) into the environment, said particle separation device having at least one separation element (28a-c) with a mesh size (42) of at most 1.0 mm, and in that an emergency degassing mandrel (62) protrudes from the closure body (44) and the base body (12) has a gas-permeable membrane (56) for gas pressure equalization in the normal operating state, which membrane is arranged directly upstream of the emergency degassing mandrel (62) along the flow path (54). [2] Degassing unit according to claim 1, characterized by that the closure body (44) is prestressed relative to the base body (12), in particular opposite to the direction of the flow path (54) leading from the interior (14) of the electronics housing into the environment in the assembled state. [3] Degassing unit according to claim 2, characterized bythat a spring element (48) is provided which prestresses the closure body (44) and is supported in particular on a protective hood (32) of the degassing unit (10). [4] Degassing unit according to one of the preceding claims, characterized by that the gas passage opening (46) is completely closed by the closure body (44) in the emergency closure state, wherein the closure body (44) is pressed by an axial force in a sealing manner against a circumferential axial sealing surface forming an edge of the gas passage opening (46) of the base body (12). [5] Degassing unit according to one of claims 1 to 4, characterized by that the gas passage opening (46) is completely closed by the closure body (44) in the normal operating state, wherein the closure body (44) is pressed in its initial position by an axial force against a circumferential axial sealing surface forming an edge of the gas passage opening (46) of the base body (12). [6] Degassing unit according to one of claims 1 to 4, characterized by that in the normal operating state, the closure body (44) in its initial position is spaced from the base body (12) at least in regions by a spacer (50) in order to prevent complete closure of the gas passage opening (46). [7] Degassing unit according to claim 6, characterized by that the spacer (50) is held on the closure body (44) in the normal operating state and has a predetermined separation point (64) which is designed to separate the closure body (44) from the spacer (50) during an emergency degassing process. [8] Degassing unit according to claim 7, characterized bythat the predetermined separation point (64) is designed as a connecting means by which the closure body (44) is arranged on the spacer (50), wherein the connecting means loses its connecting ability at a temperature of at most 250°C, preferably at most 200°C, particularly preferably at most 150°C. [9] Degassing unit according to one of the preceding claims, characterized by that the particle separation device (30) has at least one further, preferably at least two further, separation elements (28a-c), wherein preferably the mesh width (42) of the separation elements (28a-c) decreases along the flow path (54) leading from the interior (14) of the electronics housing (18) into the environment (16). [10] Degassing unit according to claim 9, characterized by that the particle separation device (30) has at least one separation element (28c) for depth filtration, preferably with a mesh size (42) of at most 0.5 millimeters. [11] Degassing unit according to one of claims 9 or 10, characterized by that at least one of the separation elements (28b, 28c) is attached to the base body (12). [12] Degassing unit according to one of the preceding claims, characterized by that the base body (12) forms one of the separation elements (28a). [13] Degassing unit according to one of the preceding claims, characterized by that in the emergency closure state, the closure body (44) rests continuously circumferentially on the base body (12), preferably a sealing element, in particular a heat-resistant seal (58) and / or a heat-resistant auxiliary seal (76), of the base body. [14] Degassing unit according to one of claims 1 to 13, characterized by that the degassing unit (10) is designed as a structural unit. [15] Degassing unit according to one of claims 1 to 13, characterized bythat the degassing unit (10) forms several, in particular two, structural units, wherein a first structural unit is designed as an outer part (72) for arrangement outside the electronics housing (18) and a second structural unit is designed as an inner part (70) for arrangement inside the electronics housing (18). [16] Degassing unit according to claim 15, characterized by that the inner part (70) of the degassing unit (18) has the particle separation device (30). [17] Degassing unit according to claim 15 or 16, characterized by that the outer part (72) of the degassing unit (18) has the closure body (44). [18] Electronics housing (18) with a degassing unit (10) according to one of claims 1 to 14. [19] Electronics housing with a degassing unit (10) according to one of claims 15 to 17, wherein the outer part (72) of the degassing unit (10) is arranged on the outside and the inner part (70) is arranged on the inside of the electronics housing (18). [20] Use of an electronics housing according to claim 18 or 19 as a battery housing for a traction battery of a motor vehicle.

Images