Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
• • A—HUMAN NECESSITIES
  • A62—LIFE-SAVING; FIRE-FIGHTING
  • A62C—FIRE-FIGHTING
  • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
  • A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/02—Details
• • 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
  • H01M50/10—Primary casings; Jackets or wrappings
  • H01M50/147—Lids or covers
  • H01M50/148—Lids or covers characterised by their shape
• • 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
  • H01M50/10—Primary casings; Jackets or wrappings
  • H01M50/147—Lids or covers
  • H01M50/155—Lids or covers characterised by the material
  • H01M50/157—Inorganic material
  • H01M50/159—Metals
• • 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
  • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
  • H01M50/202—Casings or frames around the primary casing of a single cell or a single battery
• • 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
  • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
  • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
• • 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
  • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
  • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
• • 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
  • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
  • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
• • 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
  • H01M50/342—Non-re-sealable arrangements
  • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
• • 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
  • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
  • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
  • H01M50/627—Filling ports
• • 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
  • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
  • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
  • H01M50/627—Filling ports
  • H01M50/636—Closing or sealing filling ports, e.g. using lids
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M2200/00—Safety devices for primary or secondary batteries
  • H01M2200/20—Pressure-sensitive devices
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M2220/00—Batteries for particular applications
  • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
• • 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
• • 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
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/60—Other road transportation technologies with climate change mitigation effect
  • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

• TITLE Housing for a battery and method of introducing an extinguishing fluid into such a housing.
• the invention relates to a housing for a battery.
• the invention also relates to a battery pack comprising such a housing.
• the invention also relates to a motor vehicle comprising such a housing.
• the invention also relates to a method of manufacturing such a housing.
• the invention relates to a method of introducing an extinguishing fluid into such a housing.
• Certain motor vehicles in particular vehicles with electric or hybrid engines, include a power supply battery for supplying electric energy to the electric motor, in particular the drive.
• a power supply battery for an electric or hybrid motor vehicle is, for example, of the Lithium-ion (Li-ion) type.
• a battery comprises electrochemical cells comprising an electrolyte.
• Such a battery generally comprises several battery modules or sets of electrochemical cells. The battery is surrounded by a case.
• electric or hybrid powertrains can catch fire, especially in the event of a vehicle fire, for example following a road accident or an act of vandalism, or very highly improbably following an internal failure of the battery.
• the very strong heat release near the battery can trigger a thermal runaway phenomenon inside the electrochemical cells.
• electrochemical cells can emit toxic and flammable liquids and / or gases.
• Document FR2987701 discloses a device for filling a traction battery of an electric or hybrid motor vehicle by the fire brigade, which makes it possible to introduce an extinguishing fluid into the battery as soon as the hatch closure means have been removed or melted.
• the opening of the shutter shutter means is often carried out under the effect of heat without being able to precisely control the opening moment.
• being able to precisely control the opening instant can be useful in certain situations to prevent premature opening, leading to the entry of smoke and fire into the passenger compartment, which are no longer confined in the battery.
• the aim of the invention is to provide a housing for a battery and a method of introducing an extinguishing fluid into such a housing which overcomes the above drawbacks and improves the devices and methods for extinguishing fire.
• a battery known from the prior art a battery known from the prior art.
• the invention makes it possible to produce a housing for a battery of a motor vehicle and a method for introducing an extinguishing fluid into such a housing making it possible to preserve the safety of the passengers of the vehicle by preventing entry. smoke and fire in the passenger compartment as long as possible, and by withstanding the high temperatures resulting from a battery fire.
• a housing for a battery comprises a casing and at least one rupture device provided with a rupture cover, the rupture device being mounted at the location of an opening made in the envelope, the rupture seal being configured to rupture when an overpressure is exerted on its external surface located on the external side of the housing.
• the rupture cap may be concave on the inside of the case and convex on the outside of the case.
• the rupture cap for example, has the shape of a disc.
• the rupture cap is for example steel, for example type 316 stainless steel.
• the rupture device may further comprise an internal support and an external support, the rupture membrane being interposed between the internal support and the external support, the internal support being disposed against a peripheral portion of the internal surface of the sealing membrane. rupture and the outer support being disposed against a peripheral portion of the outer surface of the rupture cover, the internal support and the outer support being perforated so as to expose a central portion of the rupture cover.
• the internal support is for example made of steel, for example of type 316 stainless steel.
• the external support is for example made of steel, for example of type 316 stainless steel.
• the housing may further include a means for fixing the breaking device to the casing of the housing.
• the fixing means may comprise a fixing piece obtained by a stamping-type process.
• Said fixing part is for example made of steel, for example of steel of DX56 type.
• the housing may further include a seal, in particular of the O-ring type, intended to be disposed between said fixing part and the casing of the housing.
• the fixing means may further comprise, for fixing the fixing part to the casing of the housing:
• At least one fastening system comprising a stud and a nut, for example a sealed fastening system of the RIVKLE type; or
• the invention also relates to a battery pack, in particular for supplying power to an electric or hybrid motor vehicle, comprising a housing as defined above.
• the invention also relates to a motor vehicle, in particular with an electric or hybrid engine, comprising a power supply battery pack as defined above or a box as defined above.
• the invention also relates to a method of manufacturing a housing as defined above, comprising a welding step, in particular by laser, of the internal support and the external support on the rupture cap of the rupture device.
• the process may include:
• the invention finally relates to a method of introducing an extinguishing fluid into a housing as defined above, comprising a step of applying an overpressure on the rupture device so as to cause the rupture of the seal. a break.
• the overpressure can be achieved by a force exerted by water ejected from a fire hose and directed towards the rupture device.
• Fig. 1 is a perspective and sectional view showing part of an embodiment of a housing for a battery.
• Fig. 2 is a top view showing part of an embodiment of a housing for a battery.
• the invention proposes to provide the housing of a battery with a rupture seal configured to rupture when an overpressure is exerted on its surface located on the outer side of the housing.
• the invention makes it possible, in the event of a battery fire, to use a force exerted by water ejected from a fire hose and directed towards the rupture cap to break it and introduce an extinguishing fluid inside the case.
• the housing 1 is intended to surround and / or serve as a casing, in particular as a protection, for a battery.
• a battery is for example a power supply battery of an electric or hybrid motor vehicle.
• Such a battery is for example of the Lithium-ion (Li-ion) type.
• battery is meant a battery or a set of battery modules.
• battery pack an assembly comprising a housing and at least one battery disposed inside the housing.
• internal surface or wall is meant a surface or wall located, or facing, inside the housing 1.
• outer surface or wall is meant a surface or wall located outside the housing 1.
• normal use or “normal use” of the housing 1 is meant use or use of the housing 1 in the absence of fire or fire, especially in normal operation of a battery.
• the housing 1 comprises a casing 2, or casing.
• the casing 2 is for example the upper casing of a battery.
• the housing 1 comprises a breaking device 5 intended to be mounted at the location of an opening 3 made in the casing 2.
• the rupture device 5 In normal use of the housing 1, the rupture device 5 is intended to seal or hermetically close the opening 3 of the casing 2. In the event of fire, the rupture device 5 is intended to rupture, in a controlled manner. and at a well-chosen moment, under the effect of a force exerted by an extinguishing fluid, in particular water, ejected from a fire hose, which makes it possible to release the opening 3 and to introduce the extinguishing fluid inside the housing 1.
• the opening 3 can be circular in shape. Other shapes could also be provided for the opening 3, for example oblong or rectangular.
• the diameter of the opening 3 can be chosen so as to correspond substantially to the diameter of the water jet of a fire hose.
• the casing 2 has a portion 4 in the form of a chimney at the location of the opening 3.
• the portion 4 is preferably substantially perpendicular to the surface of the portion of the casing 2 from which it s' extends.
• the rupture device 5 comprises a rupture cap 7.
• the rupture cap 7 comprises an internal surface 6 facing the interior of the housing 1 or located on the interior side of the housing 1.
• the rupture cap 7 comprises an external surface 8 opposite the internal surface 6.
• the external surface 8 of the rupture membrane 7 is located on the outside of the housing 1.
• the rupture cover 7 In normal use of the housing 1, the rupture cover 7 is intended to close the opening 3.
• the rupture cover 7 also corresponds to the portion of the rupture device 5 intended, in the event of fire, to break, to controlled manner and at a well chosen moment, under the effect of overpressure exerted on its outer surface 8 located on the outer side of the housing.
• the rupture cap 7 is configured to rupture when an overpressure is exerted on its outer surface 8 located on the outer side of the housing.
• the rupture cap 7 has, for example, the shape of a disc.
• disc is meant a flat disc or a domed disc.
• the rupture cap 7 has the shape of a dome.
• the rupture cap 7 is of concave shape on the inside of the case 1 and of convex shape on the outside of the case 1.
• the rupture cap 7 is mounted so as to rupture when an overpressure is exerted on its external surface 8.
• a material resistant to high temperatures resulting from a fire in a battery will be chosen.
• the rupture cap 7 is for example made of stainless steel, for example of type 316 stainless steel.
• the diameter of the rupture cap 7 is for example between 25 mm and 200 mm.
• the thickness of the rupture cap 7 is for example between 1 micrometer and 10 mm.
• diameter of the rupture cover 7 is meant the dimension of the internal 6 and external 8 surfaces.
• thickness of the rupture cover 7 is meant the dimension of the rupture cover 7 in a direction substantially perpendicular to the surfaces. internal 6 and external 8.
• the material (s) and the dimensions of the rupture cover 7 will in particular be chosen so that the rupture cover 7 can break in the event of a force exerted on the external surface 8 of the cover rupture 7 by the water jet from a fire hose of firefighters, corresponding for example to a pressure of the order of 6 bars at the level of the fire truck.
• the rupture cap 7 may be made of stainless steel, and have a diameter of the order of 60 mm and a thickness of the order of 5 micrometers, and be calibrated to rupture or open under a pressure of the order of 700 mBar, that is to say when the difference between the pressure external to the housing and the pressure internal to the housing exceeds a threshold of the order of 700 mBar.
• the rupture cap 7 comprises at least one groove 20, called median, and / or at least one groove 22, called
• the grooves 20, 22 correspond to lines of weakness of the rupture cap 7.
• the rupture membrane 7 is intended in particular to fracture or to break along the groove or grooves 20, 22.
• the groove 22 is for example a groove along the periphery or the periphery of the rupture cap 7.
• the groove 20 extends for example substantially along a middle portion of the rupture cover 7, between two diametrically opposed points of the periphery or close to the periphery of the rupture cover 7.
• a middle groove 20 extends between two diametrically opposed points of a peripheral groove 22.
• the rupture device 5 may further comprise an internal support 9 and an external support 1 1, the rupture seal 7 being interposed between the internal support 9 and the external support 1 1.
• the internal support 9 is disposed against a peripheral portion or edge or periphery of the internal surface 6 of the rupture seal 7.
• the external support 1 1 is disposed against a peripheral portion or edge or periphery of the external surface 8 of the rupture operculum 7.
• the internal support 9 and the external support 11 of the rupture device 5 are preferably perforated so as to expose a central portion of the rupture cap 7 and to allow the introduction of an extinguishing fluid inside of the housing 1 once the rupture cover 7 has been fractured.
• the internal support 9 is for example of annular shape.
• the outer support 1 1 preferably has a central opening for directly exposing a central portion of the rupture cap 7 to a pressurized extinguishing fluid, in case of fire.
• the outer support 1 1 of the breaking device 5 has for example a chimney shape.
• the exposed portion of the rupture cap 7 is intended to rupture when an excess pressure exerted by an extinguishing fluid on its surface external 8 has a predetermined threshold or minimum value.
• the predetermined threshold or minimum value of the overpressure can be chosen according to the application, the opening means available and the internal backpressure to which the device must withstand. According to an exemplary embodiment, the predetermined threshold or minimum value of the overpressure may be of the order of 700 mBar.
• the internal support 9 and the external support 1 1 are fixed in a hermetic or leaktight manner on either side of the rupture cover 7.
• the rupture device 5, comprising the rupture cover 7 and the internal 9 and external 1 1 supports has a confinement function, in particular of fluids, inside the housing 1.
• the internal support 9 and the external support 1 1 are for example made of the same material, for example in the same material as the rupture cap 7.
• the internal support 9 and the external support 1 1 will be chosen one (or more) material (s) resistant to high temperatures resulting from a battery fire and having electromagnetic shielding properties.
• the internal support 9 and the external support 1 1 are for example stainless steel, for example stainless steel 316 type.
• the housing 1 may further include a means for fixing the breaking device 5 on the casing 2.
• the fixing means comprises for example a fixing part 13.
• the fixing part 13 is for example obtained by a stamping-type process.
• the fixing part 13 is intended in particular to ensure the seal between the breaking device 5 and the casing 2 of the housing 1.
• the shape of the fixing part 13 can be
• the fixing part 13 is disposed against the outer surface of the chimney 4.
• the fixing part 13 is for example annular in shape.
• the shape of the fixing part 13 can be any shape of the fixing part 13.
• the seal 15 is arranged between the fastener 13 and the chimney 4 of the casing 2 .
• the seal 15 is for example an O-ring.
• the seal 15 is for example ethylene-propylene-diene monomer, commonly referred to by the acronym EPDM, or
• the breaking device 5 and the fixing part 13 make it possible in particular to close the opening 3 of the casing 2 of the housing 1 in a hermetic manner, in use or normal use of the housing 1.
• the fixing part 13 is for example made of steel, for example of steel of the DX56 type.
• the fixing part 13 can be mounted via a system comprising at least one welded stud and a nut, for example via a sealed system of the RIVKLE type, or else via one or more screws 17, depending on the possibilities, on the casing 2 housing 1.
• a stud is for example welded to the fastening part 13 or directly integrated into the housing 1.
• An advantage of a housing of the type described above is linked to the fact that the breaking device 5 forms, in normal use of the housing 1, an effective electromagnetic shielding which is simple to use.
• the breaking device 5 makes it possible to access the interior of the housing 1 in the event of a fire while playing an insulating role against electromagnetic disturbances emitted or suffered by the internal elements of the housing 1 in normal use.
• the invention also relates to a battery pack 30 comprising a housing 1 of the type described above.
• the battery pack 30 further comprises for example at least one battery, in particular for supplying power to an electric or hybrid motor vehicle.
• the invention further relates to a motor vehicle 40, in particular with an electric or hybrid engine, comprising a housing 1 of the type described above or a battery pack 30 of the type described above.
• Another advantage of a box of the type of that described above lies in the fact that it makes it possible, in the event of a battery fire, to prevent smoke and fire from entering the passenger compartment by resistant to
• a box of the type of that described above makes it possible, for example, to prevent smoke and fire from entering the passenger compartment for at least 5 minutes after detection of thermal runaway of a battery. This allows passengers to exit or be extracted from the vehicle before smoke and fire enter the passenger compartment.
• a housing of the type described above resides in the fact that it makes it possible to provide an effective device for introducing an extinguishing fluid into a housing of a battery, useful for firefighters in case of fire, while improving the efficiency of the electromagnetic shielding in normal use, compared to the fire extinguishing devices of a battery known from the prior art.
• An opening 3 is formed in the casing 2 of the housing 1, in particular by drilling.
• the internal support 9 and the external support 11 are fixed on either side of the rupture cap 7 of the rupture device 5, for example by welding, in particular by a laser-type process.
• An advantage associated with a welding step, in particular by laser, of the internal support 9 and of the external support 1 1 on the rupture cover 7 of the rupture device 5 lies in the fact that the internal supports 9 and external 1 1 are fixed tightly to the rupture cap 7.
• the fixing part 13 is fixed for example by welding, in particular by a laser type process, on the breaking device 5, comprising the assembly of the rupture cap 7 and the internal 9 and external supports 1 1.
• a paint deposition for example by electrophoresis, in particular by cataphoresis or cationic electrodeposition, can be carried out at least on the fixing part 13, and optionally on the breaking device 5.
• a cataphoresis step is particularly advantageous in the case where the fixing part 13 is made of steel of the DX56 type.
• a paint deposition for example by electrophoresis, in particular by cataphoresis or cationic electrodeposition, can also be carried out on at least part of the breaking device 5, for example simultaneously with the deposition on the fixing part 13.
• An advantage of a method of manufacturing a housing for a battery of the type described above is that it is simple to implement and has a reduced cost.
• the invention proposes a method making it possible, in the event of a battery fire, to use the force exerted by the jet of a fire hose to cause the rupture of the rupture cap 7 of the rupture device 5 and thus release the opening 3 of the casing 2 of the housing 1. This results in the release of direct access to the interior of the box 1 so that the firefighters can fill the box 1 with an extinguishing fluid, in particular water, and "flood" the battery to extinguish the fire. .
• the method comprises a step of applying an overpressure on the rupture device 5 so as to cause the rupture of the rupture membrane 7.
• the overpressure is for example obtained by a force exerted by water ejected from a fire hose and directed towards the rupture device 5.
• the exposed portion of the rupture cap 7 breaks when the pressure of the extinguishing fluid has a threshold or minimum value
• the predetermined threshold or minimum value of the overpressure can be chosen according to the application, the means of openings available and the internal backpressure to which the device must withstand. According to an exemplary embodiment, the predetermined threshold or minimum value of the overpressure may be of the order of 700 mBar.
• the rupture cap 7 which has ruptured makes it possible to release at least a portion of the opening 3, which allows the introduction of the extinguishing fluid into the housing 1.
• the extinguishing fluid can be introduced into the housing 1 as soon as the rupture cap 7, which formed the means of sealing the opening 3 of the casing 2 of the housing 1, has been broken.
• a pressure is exerted by the extinguishing fluid on the outer surface 8, of convex shape, of the rupture cover 7.
• the rupture cover 7 breaks or tears or is fractured under the effect of its reversal, as described in document EP1710479.
• the rupture cap 7, of convex shape turns over under the effect of the pressure and tears along a pre-weakened line in contact with a cutting element.
• Other variants exist, in particular by simple calibration of the thickness of the rupture seal to resist a predefined pressure, and could be used.
• An advantage of a method of introducing an extinguishing fluid into a housing for a battery of the type described above is that firefighters can extinguish a fire from a battery while remaining at a safe distance. certain distance from the vehicle or the box. As a result, the intervention of the fire brigade is less risky.
• Another advantage of a method of introducing an extinguishing fluid of the type described above lies in the fact that it makes it possible to use the force exerted by a jet of water from a lance to fire in its most commonly used state, for example corresponding to a pressure of the order of 6 bars at the level of the fire engine.
• a water jet from a fire hose with such pressure is commonly used by firefighters around the world. The result is that such a method does not require any particular arrangement of the firefighters' equipment.
• Another advantage of a method for introducing an extinguishing fluid of the type described above lies in the fact that the release of the opening 3 of the casing 2 of the housing 1 is carried out in a controlled manner. . Such control of the instant of release of the opening helps prevent the entry into the passenger compartment of smoke and / or fire confined in the battery, before any passengers have been able to exit the vehicle.
• a case 1 comprising a breaking device 5 has been described in relation to FIGS. 1 and 2.
• breaking devices 5, and several associated openings 3, could be provided for the same case 1. This would make it possible to optimize rapid and simple access for firefighters to at least one breaking device 5, for example in the event of a road accident.
• a box 1 for a battery of the type described above could also include other devices, called “Fireman Access” devices, making it possible to give access to the interior of the box 1 for the introduction of batteries.
• “Fireman Access” devices designate both the concept of rupture cover presented here and devices comprising a heat-fusible zone, in particular arranged on the side of the interface with the vehicle chassis.
• a housing 1 has been described in relation with FIGS. 1 and 2, in particular intended to surround a power supply battery for a motor vehicle, in particular a lithium-ion (Li-ion) type battery.
• a power supply battery for a motor vehicle in particular a lithium-ion (Li-ion) type battery.
• a box 1 could be used for all applications comprising a battery with a flammable electrolyte, in particular in the automotive, stationary energy storage and aviation fields.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Business, Economics & Management (AREA)
• Health & Medical Sciences (AREA)
• Public Health (AREA)
• Emergency Management (AREA)
• Inorganic Chemistry (AREA)
• Battery Mounting, Suspending (AREA)
• Sealing Battery Cases Or Jackets (AREA)
• Gas Exhaust Devices For Batteries (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=67742574

Family Applications (1)

Country Status (7)

Families Citing this family (3)

Family Cites Families (20)

• 2019
  • 2019-03-13 FR FR1902568A patent/FR3093864B1/fr active Active
• 2020
  • 2020-03-12 KR KR1020217033052A patent/KR20210138062A/ko not_active Application Discontinuation
  • 2020-03-12 WO PCT/EP2020/056683 patent/WO2020182953A1/fr unknown
  • 2020-03-12 JP JP2021552129A patent/JP2022522831A/ja active Pending
  • 2020-03-12 EP EP20709224.8A patent/EP3939101A1/fr active Pending
  • 2020-03-12 US US17/438,233 patent/US11916259B2/en active Active
  • 2020-03-12 CN CN202080020659.7A patent/CN113557629A/zh active Pending

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