EP3906587A1 - Unité de dégazage et boîtier électronique, en particulier boîtier de batterie - Google Patents

Unité de dégazage et boîtier électronique, en particulier boîtier de batterie

Info

Publication number
EP3906587A1
EP3906587A1 EP19827639.6A EP19827639A EP3906587A1 EP 3906587 A1 EP3906587 A1 EP 3906587A1 EP 19827639 A EP19827639 A EP 19827639A EP 3906587 A1 EP3906587 A1 EP 3906587A1
Authority
EP
European Patent Office
Prior art keywords
membrane
base body
degassing unit
membrane carrier
seal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP19827639.6A
Other languages
German (de)
English (en)
Inventor
Robert Zbiral
Axel LIEBENDÖRFER
Thomas Jessberger
Markus Hanselmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mann and Hummel GmbH
Original Assignee
Mann and Hummel GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mann and Hummel GmbH filed Critical Mann and Hummel GmbH
Publication of EP3906587A1 publication Critical patent/EP3906587A1/fr
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
    • F16K15/026—Check valves with guided rigid valve members the valve being loaded by a spring the valve member being a movable body around which the medium flows when the valve is open
    • F16K15/028—Check valves with guided rigid valve members the valve being loaded by a spring the valve member being a movable body around which the medium flows when the valve is open the valve member consisting only of a predominantly disc-shaped flat element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/14—Check valves with flexible valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
    • F16K24/04—Devices, e.g. valves, for venting or aerating enclosures for venting only
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/308—Detachable arrangements, e.g. detachable vent plugs or plug systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/317—Re-sealable arrangements
    • H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/317—Re-sealable arrangements
    • H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
    • H01M50/333—Spring-loaded vent valves
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/394—Gas-pervious parts or elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the invention relates to a degassing unit and an electronics housing, in particular a battery housing, in particular a traction battery of a motor vehicle.
  • Housings for accommodating electronic components such as battery cells and the like cannot be completely gas-tight against the environment, because on the one hand due to temperature fluctuations (e.g. due to heat input due to charging or discharging of battery cells) and on the other hand due to naturally occurring fluctuations in compressed air, especially in the case of mobile systems, a gas exchange between the interior and exterior must be enabled to prevent inadmissible mechanical loads on the housing, in particular bursting or bulging the housing.
  • temperature fluctuations e.g. due to heat input due to charging or discharging of battery cells
  • a gas exchange between the interior and exterior must be enabled to prevent inadmissible mechanical loads on the housing, in particular bursting or bulging the housing.
  • Pressure compensation devices are therefore known which have semipermeable membranes which are gas-permeable but liquid-impermeable.
  • burst protection for example in the case of lead-acid batteries, is known to use rupture disks in the sense of a “predetermined breaking point”, in particular made of a metallic sheet material, or safety flaps or valves that are inserted into a housing opening.
  • a degassing unit for a battery housing which has a base body which has a gas passage opening which is covered by a semi-permeable membrane which is permeable to gases but impermeable to liquids, the Membrane is fixed and fluid-tight connected to the base body, in particular welded.
  • the base body can be connected in a fluid-tight manner to a pressure compensation opening in the battery housing.
  • the membrane ensures gas exchange in normal operation due to its semi-permeable properties, while an emergency degassing mandrel facing the membrane is arranged on a cover body to implement an emergency degassing function, which perforates and tears the membrane when a limit expansion induced by an internal pressure of the housing is exceeded so that it breaks abrupt pressure equalization from the interior to the environment is possible.
  • a protective grille is connected to the base body, which is intended to rule out any interference with foreign bodies in the battery housing.
  • DE 10 201 1 080 325 A1 describes a similar degassing unit with a membrane held stationary on a base body, in which the emergency degassing function is also achieved via a targeted puncture of the membrane by means of a dome.
  • a degassing unit is known from DE 10 2017 003 360 B3, in which the functions of emergency degassing and ventilation are functionally separated in the normal state. While the ventilation in the normal state is realized by a nonwoven fabric fixed in the center of the base body, the emergency degassing is achieved by a screen valve that can be raised when a limit pressure is exceeded, which releases a radially external annular gap of the base body for emergency degassing.
  • the degassing units known from the prior art which already provide both ventilation in the normal state and emergency degassing, have the disadvantage that the emergency degassing pressure cannot be set with sufficient accuracy and that the flow cross section available for emergency degassing is severely limited .
  • Devices in which the membrane is perforated by a mandrel when a limit elongation is exceeded and are made to tear are robust, but have the disadvantage that the emergency degassing pressure is strongly dependent on the distance between the membrane and the mandrel tip, depending on the manufacturing tolerance, and on the manufacturing tolerance-dependent Deviations in the membrane thickness depends.
  • emergency degassing units of this type which operate on the principle of introducing a predetermined breaking point of the membrane, cannot be used reversibly, ie must be replaced after they have been triggered once.
  • DE 10 2014 1 1 1 041 A1 has disclosed a degassing unit with a displaceable membrane carrier which is pressed against a base body by spring elements integrated in one piece in the membrane carrier.
  • the membrane is provided on an inner side facing the base body and is pressed together.
  • the object of the present invention is therefore to provide a degassing unit for an electronics housing, in particular for a battery, in particular for a traction battery of a motor vehicle, which is characterized in that the emergency degassing pressure can be determined more precisely and that it can be reversibly inserted after an emergency degassing process is.
  • the degassing unit for an electronics housing in particular for a battery, in particular for a traction battery of a motor vehicle, has a base body which can be connected in a fluid-tight manner to an edge of a pressure compensation opening of the electronics housing.
  • the base body has at least one gas passage opening which is covered by a semipermeable membrane in a normal operating state of the degassing unit, the membrane allowing a passage of gaseous media from an environment into the electronics housing and vice versa, but preventing the passage of liquid media.
  • the membrane is fastened in a fluid-tight manner to a membrane carrier which can be displaced relative to the base body and which, in the normal operating state, is pressed by an axial force in a sealing manner against an axial seal surrounding an edge of the gas passage opening of the base body and when a predetermined pressure difference between an interior of the electronics housing and an environment is exceeded Release of at least one emergency degassing opening surrounding the membrane can be lifted off, in order thereby to convert the degassing unit into an emergency degassing state.
  • the axial seal is designed as a lip seal and consists of a softer material than the membrane carrier and / or the base body.
  • the term degassing unit was chosen for the device according to the invention.
  • the device according to the invention also allows ventilation of an interior of the electronics housing through the (porous) membrane in normal operation.
  • inside and outside refer to an assembly state with respect to the electronics housing, whereby “inside” means pointing to the electronics housing and “outside” means pointing to the surroundings.
  • the degassing unit according to the invention can be used to ensure an optimal seal at the base-battery housing interface, a housing seal ha ben, in particular in the form of an O-ring, which in the assembled state axially bezüg Lich an outer housing wall or radially in the pressure compensation opening of the battery riegeophuses can be pressed.
  • the base body and / or the membrane carrier can essentially consist of plastic, in particular thermoplastic, and in particular can be injection molded.
  • Preferred materials are polypropylene, polybutylene terephthalate or polyamide, each having reinforcing fibers, in particular glass fibers.
  • the membrane can be connected to the membrane carrier movable relative to the base body by gluing and / or welding, in particular by ultrasonic welding. As a result, inexpensive manufacture and sufficient tightness can be achieved.
  • the membrane can also be glued to the membrane carrier along a circumferential sealing line.
  • an emergency degassing pressure can be determined which is clearly definable in comparison with the prior art.
  • emergency degassing is not achieved by perforating the membrane and tearing it, but rather by lifting the membrane carrier from the base body under the action of an internal pressure in the housing, at least one emergency degassing opening being opened.
  • the emergency degassing pressure is therefore determined neither by the tolerance-afflicted membrane thickness nor by the design of the distance of a dome from the membrane surface, but solely by the influencing factors on the one hand the membrane surface used and on the other hand the contact pressure with which the membrane carrier to achieve the sealing effect the base body is pressed.
  • the membrane remains intact when the degassing unit is transferred to the emergency degassing state and can change after another if the emergency degassing pressure is reversibly shifted back together with the membrane support so that the degassing unit is ready for use again.
  • silicone rubber VMQ
  • fluororubber FKM
  • EPDM ethylene-propylene-diene rubber
  • the seal herein is understood to mean a component of the device other than the membrane.
  • the provision of a separate axial lip seal can ensure that the sealing contact between the base body and the membrane carrier has a high level of tightness against the ingress of foreign bodies and water, especially when pressurized (water passage, cleaning with a high-pressure cleaner).
  • An axial seal has the advantage over a radial seal that the release forces are significantly lower. While a radial seal, especially using radially sealing O-rings, can “stick” in the sealing seat, an axial lip seal enables axial force-releasing at any time.
  • the degassing unit according to the invention has the largest possible flow cross section for emergency degassing. After lifting the membrane carrier from the gas passage opening of the base body, the full cross section of the gas passage opening is also available for emergency degassing. This is conducive to rapid pressure reduction with minimization of the damage to the battery housing that can be expected.
  • the emergency degassing pressure cannot only be reduced with a width are defined, but it is also possible to trigger at significantly lower differential pressures as before, ie a very differentiated response behavior can be achieved.
  • the semipermeable membrane can be used for the semipermeable membrane, which have a gas permeability for ventilation in normal operation and a sufficiently high water impermeability.
  • Polytetrafluoroethylene (PTFE) can be used as the preferred material for the semipermeable membrane.
  • the semipermeable membrane has an average pore size, which can be between 0.01 microns and 20 microns.
  • the porosity is preferably about 50%; the average pore size is preferably about 10 microns.
  • the semipermeable membrane can preferably be designed as a film-like or film-like or disk-shaped, thin membrane.
  • the gas-permeable membrane has a membrane surface which is effective for gas permeation and which can preferably have a rectangular or round outer contour on its outer circumference.
  • the membrane is preferably a thin flat membrane, the membrane surfaces of which are directed away from one another and are effective for the passage of gas and are essentially parallel to one another and preferably essentially planar.
  • the membrane thickness of the membrane is very much smaller than its other outer dimensions.
  • the membrane can have a minimum width and / or a minimum length or a minimum outer diameter of equal to or greater than 20 mm, preferably equal to or greater than 30 mm, in particular equal to or larger than 40 mm, span.
  • the membrane edge thickness can in particular be at least 20 times, preferably at least 40 times, in particular at least 100 times, smaller than the minimum width and / or the minimum length or the minimum outside diameter of the membrane.
  • the membrane thickness can be 1 micrometer to 5 millimeters, a membrane thickness of 0.1 to 2 mm, in particular 0.15 to 0.5 mm, being preferred.
  • a circumference around the gas passage opening preferably a lip seal
  • the membrane carrier can be arranged on an inner side facing the base body or on the base body on an outer side facing the membrane support, which was in normal operation to face the gas passage opening seals the membrane.
  • the seal can be injection molded onto the membrane carrier or base body, for example by means of a two-component injection molding process. Alternatively, it can also be glued on.
  • the lip seal preferably has at least one sealing lip with a quasi linienför-shaped sealing line, which produces as little adhesion effects as possible and does not stick even after a long time.
  • the seal is preferably held or fixed in a circumferential seal receiving groove of the base body. Alternatively or additionally, the seal can also be glued to the base body or molded onto it by means of a two-component injection molding process.
  • the seal receiving groove is preferably provided on an outer side of the base body facing the membrane carrier, surrounding the gas passage opening.
  • a sealing lip receptacle groove can be provided, which can be conical in particular and which enables a sealing by means of the sealing lip which is optimized by the cone effect (conicity effect).
  • the seal receiving groove can also be present on the membrane carrier on its inner side facing the base body.
  • the at least one sealing lip can enclose an angle between 10 ° and 60 °, preferably between 20 ° and 45 °, with respect to a longitudinal axis. This reduces the axial forces required to deform the sealing lip and thus ensures a reliable seal using low axial forces.
  • the membrane can be connected to the membrane carrier in a fluid-tight manner all around, in particular welded all round, the membrane preferably on an inner side of the body facing the base body Membrane carrier is present.
  • a system or connection to the inside of the membrane carrier has the advantage that the membrane is held virtually positively against the membrane carrier when exposed to internal pressure and the connection (welding, bonding or the like) is not subjected to tension, which is particularly the case with It is important to use PTFE materials that are difficult to add anyway.
  • the membrane carrier can have a membrane outer protective grille, which at least partially spans the outside of the membrane surface, but with a sufficiently large proportion of area is permeable to fluids to enable gas exchange during normal operation.
  • the membrane carrier can be pressed against the base body by at least one spring element.
  • the spring element can preferably be a compression spring, in particular a spiral spring.
  • the invention is not limited to this. Rather, other spring elements not explicitly mentioned here are also included, such as disc springs and / or the spring tongues.
  • the degassing pressure can be determined very precisely and reproducibly by a suitable selection of the spring stiffness of the spring element.
  • the tripping characteristics can be further adjusted by using springs with customized spring characteristics, whereby progressive or, in particular, degressive spring characteristics are also possible. With a degressive characteristic curve, it is possible to set a specifically sluggish response behavior, while a progressive characteristic curve can achieve a faster response behavior.
  • the degassing unit can have a cover which is connected to the base body, the cover preferably having at least one ventilation opening.
  • the cover hood ensures that the outside of the membrane cannot be damaged with foreign bodies, such as pointed objects such as screwdrivers, etc., or with flap pressure cleaners and / or steam jets, and thus effectively contributes to a high IP protection class.
  • the Federele element at one end on an inner surface of the cover facing the membrane support and at the other end on an outer surface facing the cover Membrane support is supported.
  • the cover preferably has a spring guide or a spring plate on its inside facing the membrane carrier, which is designed to prevent the spring from slipping in particular radially.
  • the spring guide or the spring plate particularly preferably has a sleeve section which extends axially and from which, in the case of a spiral spring as a spring element, the spring is supported coaxially.
  • the membrane carrier can also have a spring guide or a spring plate, which is preferably present on the outer side of the membrane carrier facing the cover.
  • a further, likewise preferred, embodiment provides that the covering hood overlaps the outer circumference of the base body at least in part and is preferably fastened to the outer circumference of the base body by means of a catch element engagement.
  • overlap is associated with an axial overlap.
  • the spring force Via the connection of the cover hood to the base body, the spring force, which is introduced into the cover hood according to some embodiments, can be transmitted to the base body.
  • other fastening means are also suitable for fastening the cover hood to the base body, for example positive or non-positive fastening means such as screws or undercuts.
  • the linear guide is preferably designed as a combination of at least one corresponding pin and at least one bore, preferably at least one hole being present on an outside of the base body facing the membrane carrier and on the inside of the membrane carrier facing the base body a corresponding one with the bore Pin which is guided in the hole.
  • the invention is not limited to this, but also covers inverted versions. with pins on the base body and holes on the membrane support.
  • the cross-sectional shape of the bores and journals is not limited to circular cross-sections, but encompasses any complementary shapes that are capable of allowing the diaphragm support to be guided linearly with respect to the base body, for example a combination of a groove as a “bore” and a complementary one Sword as a “cone”, and other polygonal or elliptical cross-sectional shapes, at least in sections.
  • the gas passage opening of the base body is at least partially covered, preferably completely, by a fluid-permeable protective grid.
  • the protective grille serves as protection against intrusion into an interior of the electronics housing, so that objects such as screwdrivers or the like cannot get inside. This is particularly important, since traction batteries for vehicles are often operated in the high-voltage range and this can result in dangers.
  • the protective grille can have a plurality of spaced grating bars, the minimum spacing of which is to be selected such that an intervention can be reliably ruled out.
  • the grid bars can be arranged in a right-angled grid or as a combination of circumferential and radial grid bars.
  • the protective grille can in particular be formed in one piece with the base body or be connected to it as a separate component, in particular on an inside of the base body which faces the electronics housing in the state in which the degassing unit is mounted.
  • the protective grid can preferably be made of or consist of a metal or a plastic, preferably polypropylene and / or polybutylene terephthalate, each preferably having reinforcing fibers, in particular glass fibers.
  • a protective grille made of metal has the advantage that the protective function is retained even after exposure to high temperatures (e.g. fire). In a separate version of the protective grille, this can be screwed, riveted or connected by means of a hot stamp, for example.
  • the base body and / or the cover plastics come into consideration, in particular thermoplastic plastics, which are processed by injection molding. are cash.
  • the base body and / or the cover hood made of polypropylene, polybutylene terephthalate or polyamide, each having reinforcing fibers, in particular glass fibers, or at least one of these materials at least.
  • the base body can have at least one connecting means with which the degassing unit can be connected to the electronics housing, the connecting means preferably being formed as a bayonet connecting means or as a threaded connecting means.
  • the bayonet connection means particularly preferably protrudes axially from an inside of the base body, which faces the electronics housing in the assembled state.
  • the connection means can preferably be formed by one or more threaded bushes (in particular a threaded insert in plastic).
  • the degassing unit can have a housing seal which surrounds the inner side of the gas passage opening of the base body.
  • the housing seal can be designed as an axial or radial seal, i. H. in particular on an end face (in the case of the axial seal) or on a lateral surface (in the case of the radial seal).
  • the housing seal can be designed as an O-ring, which is received in a corresponding groove in the base body, or as an injection-molded sealing component.
  • An arrangement of the housing seal in an axial configuration is preferred, with the housing seal particularly preferably surrounding a bayonet connection means which projects in particular axially.
  • Another aspect of the invention relates to an electronics housing, in particular a battery housing, in particular a traction battery of a motor vehicle.
  • a further possible uses of the degassing unit according to the invention in addition to traction batteries are, for example, control cabinets or transformer housings.
  • the electronics housing has at least one housing wall with a pressure compensation opening
  • battery cells can preferably be arranged in the electronics housing and the pressure compensation opening is closed by a degassing unit according to the invention, so that a gas exchange between an interior of the electronics housing and the environment is possible in a normal operating state, but this Penetration of moisture (water), dirt and foreign bodies is effectively prevented and a quick-release emergency degassing function is provided, which in the event of a pressure increase in the Interior prevents damage or destruction of the wall of the electronics housing.
  • At least one counter-connection means corresponding to the bayonet connection means of the degassing unit can be present on the housing wall in a region surrounding the pressure equalization opening.
  • the outside of the housing wall can have a sealing surface surrounding the pressure compensation opening, against which the housing seal of the degassing unit rests in an assembled state.
  • the sealing surface is preferably designed as an area of the wall of the electronics housing with the smallest possible deviations in terms of flatness and low roughness.
  • Figure 1 is an exploded isometric view of a degassing unit according to the invention.
  • Figure 2 is a longitudinal sectional view of the degassing unit according to the invention in the normal operating state.
  • Fig. 3 is a longitudinal sectional view of the degassing unit according to the invention in the No tentgasungsschreib;
  • Fig. 4 is a longitudinal sectional view of the degassing unit according to the invention in the normal operating state with the cover hood hidden;
  • FIG. 5 detail B from FIG. 4;
  • FIG. 6 detail of an alternative sealing solution.
  • the degassing unit 10 is in an isometric explosion shown ons.
  • This has a base body 1, the Bajonettver binding means 13 which protrude axially from an inner end face of the base body 1 with the edge of a pressure compensation opening of an electronics housing, in particular a battery housing of a traction battery, can be connected.
  • a housing seal 7 is provided, which is designed here as an axially acting O-ring.
  • the base body has a gas passage opening 15 through which pressure equalization takes place both in the normal operating state and pressure can escape from the battery housing in the emergency degassing state.
  • the gas passage opening 15 is covered by a fluid-permeable protective grille 12, which provides protection against tampering and prevents that live components inside the electronics housing are touched and / or damaged by pointed objects.
  • the protective grid 12 has a plurality of grid webs which are arranged both circumferentially and in the radial direction and form a network of grid webs.
  • the protective grille 12 is formed in the present embodiment, in one piece with the base body 1, in particular injection-molded in one piece.
  • the degassing unit 10 has a membrane carrier 2, which is displaceable in the axial direction relative to the base body 1, i. H. it has a degree of freedom of movement in the axial direction.
  • the membrane carrier 2 carries on its inside facing the base body 1 a semipermeable membrane 6, which is permeable to gaseous fluids, but prevents the passage of solids and liquids.
  • the semipermeable membrane 6 is connected to the membrane carrier 2 in a fluid-tight manner around the gas passage opening 24 of the membrane carrier 2, preferably welded or glued.
  • the membrane carrier 2 is axially pressed in the normal operating state of the Entgasungsein unit 10 by a spring element 4, here a spiral spring, in a direction pointing to the base body 1, so that a provided in the axial direction between the membrane carrier 2 and base body 1 circumferential seal 5 opposite the membrane carrier 2 seals the base body 1.
  • a spring element 4 here a spiral spring
  • the spiral spring 4, which exerts the contact pressure on the membrane carrier 2, is supported at one end on the inside of the cover 3 and at the other end on an outside of the membrane carrier 2 facing the cover 3.
  • the cover 3 is connected to the base body 1 to derive the spring forces ; it surrounds the base body 1 radially on the outside with a peripheral edge and is connected to it in a form-fitting manner by means of locking element interventions.
  • the engagement of the locking elements is realized by the combination of corresponding locking hooks 14 on a surface of the base body 1 and locking openings 31 in a surface of the cover 3.
  • the cover 3 has a plurality of circumferentially distributed ventilation openings 32 through which gases could flow into and out of the electronics housing both in the normal operating state and in the emergency degassing state.
  • a spring guide 22 is provided on the outer surface of the membrane carrier 2 facing the cover 3, which spring guide 22 consists of a plurality of circumferentially distributed elevations with axial extension, which are surrounded by the spiral spring 4 are.
  • the spiral spring can also be present within the spring guide 22 and / or the spring guide can be designed as a continuous sleeve-shaped extension.
  • the spring guide 22 is connected via radially extending connecting elements, here stop bridges 23, to an outer periphery of the membrane carrier 2, wherein the gas passage opening (s) 24 of the membrane carrier 2 is (are) formed in an annular gap between the outer periphery and the spring guide 22.
  • the seal 5, which is present between the membrane carrier 2 and the base body 1, has two areas, a fastening area 52 with which it is received in the circumferential seal receiving groove 16 of the base body 1, and a sealing lip 51 with a material thickness that is reduced compared to the fastening area 52.
  • the fastening area 52 and the sealing lip 51 are formed all around, so that the seal forms an annular seal.
  • the fastening area 52 of the seal 5 is received in a seal receiving groove 16 of the base body 1, which surrounds the gas passage opening 15 radially on the outside.
  • the sealing lip 51 is located at one of the fastening area 52 axially facing away from the end of the seal 5 and is designed to lie in the normal operating state on a sealing counter surface on a side facing the base body 1 of the membrane carrier 2 in a sealing manner.
  • a sealing counter surface On the sealing counter surface, the membrane carrier 2 has a sealing lip receiving groove 25, which has a circumferential guide surface radially on the inside, which guides and centers the sealing lip 51 of the seal 5 when the degassing unit 10 is returned from the emergency degassing state to the normal operating state.
  • one of the advantages of the present invention is the large flow cross-section of the emergency degassing opening (s) in the emergency degassing state, which is achieved by a large stroke of the membrane carrier 2 relative to the base body 1.
  • a linear guide is provided so that the membrane carrier 2 does not tilt and / or move inadmissibly in the radial direction even at maximum stroke, which is formed by corresponding holes 11 and pins 21.
  • the pins 21 are present on the membrane carrier 2 and extend freely inward in the axial direction to the base body 1.
  • the pins 21 are each guided in bores 1 1 of the basic body 1, which are open to the outside in the axial direction of the membrane carrier 2.
  • the length of the pins 21 is dimensioned with a view to the maximum stroke in such a way that they are still guided in the bores 11 with a predetermined minimum length even at the maximum stroke.
  • the linear guides also ensure that the sealing lip 51 of the seal 5 always on the intended sealing surface in the sealing lip receiving groove 25 of the membrane carrier comes to rest and not radially offset, which could lead to leaks during operation. This thus ensures that the degassing unit 10 can easily return to the normal operating state after the transition to the emergency degassing state; ie the reversible functionality is made possible by the linear guide.
  • the degassing unit 10 is shown in a longitudinal section in the normal operating state.
  • the membrane carrier 2 is pressed axially by the compression spring 4 supported on the cover 3, with the interposition of the seal 5, against the base body 1.
  • the only gas exchange takes place through the membrane 6, through which the gas passage opening 15 of the base body and the gas passage opening 24 of the membrane carrier 2 can flow.
  • the locking element engagement for fastening the cover 3 to the base body can also be clearly seen, the locking hooks 14 present on the base body 1 being present as radial bulges.
  • the compression spring 4 is also guided radially on the cover 3 side by a spring guide 33, which is designed as a dome 33 projecting coaxially into the compression spring 4.
  • the membrane 6, which is circumferentially welded to an inside of the membrane carrier 2 surrounding the gas passage opening 24, rests on the protective grid 12 of the base body 1.
  • the membrane carrier is displaced axially in the direction of the cover (to the outside) under the action of this pressure; this state is shown in FIG. 3.
  • the maximum stroke H of the membrane carrier 2 relative to the base body is designated by H, so that a circumferential emergency degassing opening N is released, which makes it possible for the internal pressure of the housing to get into the environment along the emergency degassing gas path G.
  • the flow cross section of the emergency degassing opening N is determined by the axial gap between the sealing lip 51 and the corresponding counter-sealing surface in the sealing lip receiving groove 25 of the membrane carrier 2.
  • the emergency degassing gas path G runs along the inner contour of the cover 3 and finally through the ventilation openings 23. If the internal pressure of the housing falls below a predetermined closing pressure again, i.e. if the spring force increases the compressive force on the diaphragm surface 61 again, the diaphragm carrier 2 is axially moved back again (flysteresis) and is supported by the linear guide, so that the sealing lip 51 is exactly centered on the counter-sealing surface can come into contact in the sealing lip receiving groove 25 in a sealing contact.
  • FIG. 5 shows detail B from FIG. 4.
  • Fig. 6 an alternative to Fig. 5 seal attachment is shown.
  • the seal 5 is molded onto the membrane carrier 2 in a two-component injection molding process, the membrane carrier having at least one recess through which the sealing material is sprayed.
  • the seal can also have more than one sealing lip 51, which are preferably arranged coaxially, preferably concentrically, with one another.
  • one of the sealing lips 51 can have a greater length than the other, whereby the axial forces required for pressing or achieving the sealing force can be reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Gas Exhaust Devices For Batteries (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

L'invention concerne une unité de dégazage (10) pour un boîtier électronique, en particulier pour une batterie, en particulier pour une batterie de traction d'un véhicule à moteur, ladite unité de dégazage (10) présentant un corps de base (1) pouvant être relié de manière étanche aux fluides à un bord d'une ouverture d'équilibrage de la pression du boîtier électronique, ledit corps de base comportant au moins un orifice de passage de gaz (15) qui est recouvert par une membrane (6) semi-perméable, dans un état de fonctionnement normal de l'unité de dégazage (10). La membrane (6) permet à des milieux gazeux provenant d'un environnement de pénétrer dans le boîtier électronique et inversement, tout en empêchant le passage de milieux liquides et/ou de solides. La membrane (6) est fixée de manière étanche aux fluides sur un support de membrane (2) pouvant se déplacer relativement au corps de base (1), ledit support de membrane étant comprimé dans un état de fonctionnement normal avec effet d'étanchéité par une force axiale sur un joint à lèvre (5) axial entourant un bord (151) de l'orifice d'entrée de gaz (15) du corps de base (1), ledit joint à lèvre consistant en un matériau plus souple que celui du support de membrane (2), de sorte que le support de membrane (2) peut être soulevé du corps de base (1) en cas de passage de la pression au-dessus d'une pression différentielle prédéfinie entre un espace intérieur du boîtier électronique et un environnement, avec pour effet de dégager au moins un orifice de dégazage d'urgence (N) entourant la membrane (6), de sorte à faire passer l'unité de dégazage (10) dans un état de dégazage d'urgence. L'invention concerne par ailleurs un boîtier électronique dotée d'une unité de dégazage (10) selon l'invention.
EP19827639.6A 2019-01-04 2019-12-10 Unité de dégazage et boîtier électronique, en particulier boîtier de batterie Pending EP3906587A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019100094.7A DE102019100094A1 (de) 2019-01-04 2019-01-04 Entgasungseinheit und Elektronikgehäuse, insbesondere Batteriegehäuse
PCT/EP2019/084335 WO2020141044A1 (fr) 2019-01-04 2019-12-10 Unité de dégazage et boîtier électronique, en particulier boîtier de batterie

Publications (1)

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EP3906587A1 true EP3906587A1 (fr) 2021-11-10

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US (1) US11804633B2 (fr)
EP (1) EP3906587A1 (fr)
CN (1) CN113228394A (fr)
DE (1) DE102019100094A1 (fr)
WO (1) WO2020141044A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019215433A1 (de) * 2019-10-09 2021-04-15 Volkswagen Aktiengesellschaft Druckausgleichselement zur Dichtigkeitsprüfung eines Gehäuses
DE102020210388A1 (de) 2020-08-14 2022-02-17 Elringklinger Ag Druckausgleichsvorrichtung und elektrochemisches System
SI26109A (sl) * 2020-11-11 2022-05-31 Siliko d.o.o. Varnostni ventil za baterijo ali akumulator za električna ali hibridna vozila
DE102020131594A1 (de) 2020-11-30 2022-06-02 Mann+Hummel Gmbh Druckausgleichseinrichtung und Verfahren zum Druckausgleich
DE102020134548A1 (de) 2020-12-22 2022-06-23 Konzelmann Gmbh Notentgasungsvorrichtung
CN113346189A (zh) * 2021-06-15 2021-09-03 安徽捷创科技有限公司 一种便于拆卸的锂电池盖帽结构
FR3126064B1 (fr) * 2021-08-09 2023-07-28 Sogefi Filtration Spa Agencement de ventilation d’urgence pour boîtier de batterie(s) et procede d’assemblage
DE102021122477B4 (de) 2021-08-31 2024-03-14 Bodo Konzelmann KG. Druckausgleichsvorrichtung
DE102021125558A1 (de) 2021-10-01 2023-04-06 Woco Industrietechnik Gmbh KFZ-Batterie-Druckausgleichsventil
DE102021212057A1 (de) 2021-10-26 2023-04-27 Volkswagen Aktiengesellschaft Notentgasungseinrichtung für einen Akkumulator und Akkumulator für ein Kraftfahrzeug
DE102021128942A1 (de) 2021-11-08 2023-05-11 Mann+Hummel Gmbh Entgasungseinheit und Elektronikgehäuse mit einer Entgasungseinheit
DE102021129319A1 (de) 2021-11-11 2023-05-11 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Batterie
AT525598B1 (de) * 2021-11-11 2023-08-15 John Deere Electric Powertrain Llc Schutzvorrichtung für Batteriezellen
WO2023086040A1 (fr) * 2021-11-15 2023-05-19 Bi̇med Tekni̇k Aletler Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ Dispositif d'équilibrage de pression
CN217035867U (zh) * 2021-12-02 2022-07-22 北京车和家汽车科技有限公司 泄压装置、电池包及车辆
DE102021006213B3 (de) 2021-12-16 2023-06-15 Mercedes-Benz Group AG Batteriegehäuse

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3860453A (en) * 1972-10-30 1975-01-14 Mc Graw Edison Co Non-spill vent valve for liquid electrolyte battery
DE4241943C2 (de) * 1992-12-11 1994-12-01 Busak & Luyken Gmbh & Co Verschlußmittel und Dichtungsventil für Behälteröffnungen
US20010049051A1 (en) * 1996-11-12 2001-12-06 William E. M. Jones Use of catalysts in standby valve-regulated lead acid cells
JP3615322B2 (ja) * 1996-09-30 2005-02-02 三洋電機株式会社 密閉型電池
US6855454B2 (en) * 2001-12-20 2005-02-15 Eveready Battery Company, Inc. Electrochemical cell having venting current collector and seal assembly
DE10255290B4 (de) * 2002-11-26 2006-02-16 Vb Autobatterie Gmbh Akkumulator und Verschlussstopfen für einen Akkumulator
IT1400703B1 (it) * 2010-06-24 2013-06-28 Gvs Spa Dispositivo di sfiato e ventilazione di sicurezza antiscoppio perfezionato di un contenitore
US10637025B2 (en) * 2011-08-01 2020-04-28 Doyle Manufacturing, Inc. Battery vent cap
DE102011080325A1 (de) 2011-08-03 2013-02-07 Elringklinger Ag Druckausgleichsvorrichtung für ein Gehäuse einer elektrochemischen Vorrichtung
DE102012022346B4 (de) 2012-11-15 2018-03-22 Mann+Hummel Gmbh Batterie-Gehäuse
DE102014111041B4 (de) * 2014-08-04 2023-07-06 Lisa Dräxlmaier GmbH Entgasungsventil zur Entgasung eines Gehäuses, insbesondere eines Gehäuses einer Batterie eines Kraftfahrzeuges
DE102015214256A1 (de) * 2015-07-28 2017-02-02 Bimed Teknik A.S. Druckausgleichsvorrichtung
JP6350480B2 (ja) 2015-10-05 2018-07-04 トヨタ自動車株式会社 密閉型電池
KR102629819B1 (ko) * 2016-02-19 2024-01-26 삼성에스디아이 주식회사 배터리 팩
CN105702898A (zh) * 2016-05-04 2016-06-22 惠州市沃瑞科技有限公司 一种应用电池包的快速泄压平衡阀
EP3284985B1 (fr) 2016-08-17 2020-01-08 W.L. Gore & Associates GmbH Clapet de retenue
DE202016105275U1 (de) * 2016-09-22 2018-01-09 AZ Ausrüstung und Zubehör GmbH & Co. KG Einrichtung zum Druckausgleich
CN206349430U (zh) * 2016-11-03 2017-07-21 南京骏睿新能源汽车科技有限公司 一种电动汽车动力电池用安全阀装置
DE102017003360B3 (de) 2017-04-06 2018-07-19 Carl Freudenberg Kg Druckausgleichsvorrichtung für ein Gehäuse
CN108735949B (zh) * 2018-04-09 2020-12-25 浙江零跑科技有限公司 一种动力电池包防爆泄压装置
CN208298911U (zh) * 2018-06-15 2018-12-28 惠州市沃瑞科技有限公司 防爆透气阀

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US20210320375A1 (en) 2021-10-14
DE102019100094A1 (de) 2020-07-09
CN113228394A (zh) 2021-08-06
WO2020141044A1 (fr) 2020-07-09
US11804633B2 (en) 2023-10-31

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