WO2022228753A1 - Dispositif de protection anti-encastrement, ensemble batterie, véhicule automobile et procédé de détection d'une collision d'un objet avec un ensemble batterie - Google Patents

Dispositif de protection anti-encastrement, ensemble batterie, véhicule automobile et procédé de détection d'une collision d'un objet avec un ensemble batterie Download PDF

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Publication number
WO2022228753A1
WO2022228753A1 PCT/EP2022/055285 EP2022055285W WO2022228753A1 WO 2022228753 A1 WO2022228753 A1 WO 2022228753A1 EP 2022055285 W EP2022055285 W EP 2022055285W WO 2022228753 A1 WO2022228753 A1 WO 2022228753A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
hose
protection device
elongate
reinforcement
Prior art date
Application number
PCT/EP2022/055285
Other languages
German (de)
English (en)
Inventor
Oliver Stoll
Julius Rausch
Frieder Uerlings
Original Assignee
Audi Ag
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
Priority claimed from DE102021116864.3A external-priority patent/DE102021116864B3/de
Application filed by Audi Ag filed Critical Audi Ag
Publication of WO2022228753A1 publication Critical patent/WO2022228753A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B60K2001/0405—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
    • B60K2001/0438—Arrangement under the floor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/30—Sensors
    • B60Y2400/304—Acceleration sensors
    • B60Y2400/3042—Collision sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/30—Sensors
    • B60Y2400/306—Pressure sensors

Definitions

  • Underrun protection device battery assembly, motor vehicle and method for detecting an impact of an object with a battery assembly
  • the invention relates to an underride protection device for a motor vehicle, a battery arrangement with such an underride protection device, a motor vehicle with such a battery arrangement and a method for detecting an impact of an object on such an underride protection device with such a battery arrangement.
  • a battery which is designed as a high-voltage battery, in an underbody area of the motor vehicle.
  • An underride guard is located below the high-voltage battery to protect the battery.
  • DE 102018 129 158 A1 shows a safety device for a battery with an underbody part.
  • the underbody part has struts for stiffening the underbody part, and three sensors in the form of pressure hoses are provided between the underbody part and a battery module arranged above it. The three sensors can be used to detect whether, for example, a bollard deforms the underbody part.
  • DE 102014203255 A1 shows a device for detecting a side impact of an object on a vehicle door of a motor vehicle. The impact of the object on an outside of the vehicle door can be detected by means of a pressure hose arranged in the vehicle door and an associated pressure sensor.
  • DE 102006 040 216 A1 shows a collision detection system for a vehicle, in which a deformation of a vehicle door when the vehicle collides with an object can be detected by means of a pressure detection element, such as a pressure sensor.
  • the object of the present invention is to provide a solution by means of which an impact of an object on an underride protection device of a motor vehicle can be detected as simply and efficiently as possible.
  • the underrun protection device according to the invention for a motor vehicle comprises a flat base element.
  • the flat base element is designed, for example, as a plate with a predetermined thickness.
  • the flat base element preferably has a length and a width that is large in each case compared to the thickness of the base element.
  • the flat basic element can delimit the motor vehicle in a vehicle vertical direction towards a driving floor arranged below the motor vehicle. If this is the case, a surface of the flat basic element forms an outer surface of the motor vehicle, which faces the roadway.
  • the underrun protection device of the motor vehicle comprises at least one elongate reinforcement device.
  • the at least one elongate reinforcement device has a front face and a back face opposite the front face.
  • the back of the reinforcement device is coupled to the planar base element.
  • the elongate reinforcing means is preferably made of the same material as the base sheet.
  • a longitudinal direction of the elongate reinforcement device is parallel to one in the preferred installation position of the underride protection device in the motor vehicle Vehicle longitudinal direction of the motor vehicle aligned.
  • the longitudinal direction of the reinforcement device is arranged parallel to the surface of the flat base element.
  • the front of the elongate reinforcement means may alternatively be referred to as the first side of the elongate reinforcement means and the opposite rear side as the second side of the elongate reinforcement means, the reinforcement means being coupled to the base sheet at the second side.
  • the reinforcement device is preferably connected to the base element, with this connection preferably being formed in a materially bonded manner, for example by gluing or being produced as a one-piece component.
  • the underrun protection device includes a pressure hose with a predetermined hose volume and a predetermined hose pressure within the pressure hose.
  • the pressure hose is designed to reduce the hose volume when a force acts on a hose jacket of the pressure hose and to increase the hose pressure in the pressure hose.
  • the pressure hose is made of silicone, for example.
  • the pressure hose is elastically deformable, so that when the force acts on the pressure hose, it is deformed in such a way that the hose volume is reduced.
  • a predetermined minimum force can be predetermined, with the hose volume being reduced and the hose pressure being increased only when the force on the pressure hose exceeds the predetermined minimum force.
  • the pressure hose is designed as a hermetically sealed element and thus forms a hermetically sealed system within the underrun protection device.
  • An interior of the pressure hose ie a space in the pressure hose that forms the hose volume, is thus closed off in a gas-tight and fluid-tight manner from the surroundings of the pressure hose.
  • a pressure change in the pressure hose always occurs, for example, when an object is pressed against the pressure hose, for example.
  • the underrun protection device also has a pressure sensor.
  • the pressure sensor is designed to detect the increase in hose pressure detect and provide a pressure reading describing the increase in hose pressure. The pressure reading thus quantifies the hose pressure measured by the pressure sensor.
  • the pressure sensor can preferably detect any type of pressure change.
  • the pressure sensor is therefore preferably designed to detect a change in the hose pressure and to provide the measured pressure value that describes the change in the hose pressure. It is thus also possible to use the pressure sensor to detect a decrease in the hose pressure and to provide the corresponding measured pressure value. In the event of an elastic deformation of the pressure hose, a reduction in the hose pressure observed after an only temporary increase in the hose pressure can also be detected by means of the pressure sensor.
  • the pressure sensor can be designed as an absolute pressure sensor, differential pressure sensor, bidirectional differential pressure sensor and/or as a relative pressure sensor.
  • the pressure hose extends at least partially along a longitudinal direction of the at least one elongate reinforcement device and is coupled to the front side thereof.
  • the side of the elongate reinforcing device facing away from the planar base element which is referred to for example as the first side of the reinforcing device, thus faces the pressure hose, since the pressure hose is arranged on precisely this side of the reinforcing device.
  • a longitudinal direction of the pressure hose ie its extension in the axial direction of the preferably cylindrical hose, is thus arranged parallel to the longitudinal direction of the at least one elongate reinforcement device.
  • the pressure hose and the at least one elongate reinforcement device are preferably firmly connected to one another.
  • the pressure hose does not have to be coupled to the elongate reinforcement device over the entire length of the pressure hose, but the pressure hose can have partial areas which protrude beyond the elongate reinforcement device, for example in the longitudinal direction of the underride protection device, and in which the pressure hose is not coupled to the front side of the reinforcement device. In the protruding sub-areas, the pressure hose is preferably exposed and not in contact with any component of the underride protection device.
  • the underrun protection device is arranged adjacent to a battery housing or another component of the motor vehicle.
  • a force acts on the flat base element that is greater than a predetermined minimum force
  • the force is then exerted on the hose jacket of the pressure hose, since the pressure hose is pressed against the battery housing or the other component of the motor vehicle.
  • the force is sufficiently large, which is defined by the fact that the force is greater than the specified minimum force, the tube volume is reduced and the tube pressure is increased as a result. This is because this force acting on the flat basic element also results in a sufficiently large force acting on the pressure hose, which leads to the hose volume being reduced.
  • the application of force can occur, for example, when an object impacts the underride protection device, for example when the underride protection device is arranged in the preferred installation position in the motor vehicle and the motor vehicle drives over an object such as a bollard.
  • the force is therefore applied when an object impacts the underrun protection device.
  • the underride protection device is thus designed to simply and efficiently detect the impact of an object on the underride protection device in the preferred installation position, since the impact causes an increase in hose pressure, which is detected by the underride protection device.
  • the impact of the object on the underride protection device can thus be detected by means of the underride protection device, with a measured value describing this impact being provided in the form of the measured pressure value.
  • This measured pressure value can then be made available, for example, for a device in the motor vehicle that, for example, issues a warning or outputs information to a driver of the motor vehicle, who is informed by the warning message or the information that due to the impact of the object, deformation of the underride protection device was observed, which, for example, could in principle result in damage to a vehicle battery arranged above the underride protection device.
  • the pressure measurement value provided can be used to initiate an emergency stop of the motor vehicle, which is carried out, for example, partially or fully autonomously by the motor vehicle, since damage to the vehicle battery due to the impact of the object is at least suspected due to the increase in hose pressure detected.
  • the underrun protection device has been installed in the preferred installation position in a motor vehicle.
  • the underrun protection device forms a device that is designed to detect a force acting on the underrun protection device in a simple and efficient manner.
  • the invention also includes configurations that result in additional advantages.
  • the at least one elongate reinforcement device has an elongate main element with a plurality of rib elements arranged laterally thereto.
  • the rib elements are arranged parallel to the front of the elongate reinforcement means.
  • the rib elements thus lie in a plane in which the front and rear sides of the elongate reinforcement device also lie.
  • the rib elements are arranged on two opposite sides of the elongate main element. It can alternatively be provided that the rib elements are arranged only on one side of the elongate main element.
  • the rib elements are preferably configured parallel to one another as individual elongate ribs, the rib elements preferably being arranged perpendicular to the longitudinal direction of the elongate main element and thus to the longitudinal direction of the elongate reinforcement device.
  • a longitudinal orientation of the individual rib elements is then preferably arranged perpendicular to the longitudinal direction of the reinforcement device.
  • the rib elements can be arranged in such a way that there is an angle between, for example, 45 degrees and 90 degrees or any angle less than 90 degrees between the longitudinal alignment of the individual rib elements and the longitudinal direction of the reinforcement device.
  • the individual rib elements can be arranged at different angles to the longitudinal direction of the reinforcement device, so that the individual rib elements are not parallel to one another.
  • both the rib elements and the main elongate element are preferably arranged in a common plane, so that the ribs are not arranged, for example, perpendicularly to the front or to the rear of the reinforcement device.
  • the reinforcement device thus has a type of rod-shaped central element, the elongated main element, on which smaller ribs in the form of the rib elements are attached laterally. There is preferably a free space between the individual rib elements.
  • the reinforcement device is designed as a kind of rib-like reinforcement element. This configuration of the reinforcement device ensures that the flat base element is reinforced in such a way that the underride protection device has greater rigidity and is therefore more robust with respect to deformations. It can be achieved, for example, that when the object impacts with a force that is less than the specified minimum force, the base element is already sufficiently reinforced by the reinforcement device that the impact does not cause any plastic deformation of the underrun protection device.
  • the at least one elongate reinforcement device has a lattice-like structure, ie a lattice structure shape.
  • an elongate main element instead of an elongate main element, it can have, for example, at least two elongate main elements, which are preferably arranged parallel to one another.
  • several transverse elements are arranged perpendicular to the at least two main elements.
  • the individual transverse elements are preferred formed parallel to each other.
  • a distance between two adjacent transverse elements is preferably smaller than a distance between two adjacent skin elements.
  • the main and transverse elements form a lattice structure.
  • the transverse elements can be arranged at least partially at an angle between greater than zero degrees and less than 90 degrees to the main elements.
  • the at least one elongate reinforcement device has at least one additional element protruding laterally from the elongate main element. It is not necessary for the main element to have the plurality of rib elements. Rather, it may be sufficient if the at least one elongate reinforcement device has an elongate main element which is designed, for example, as a straight rod. As an alternative to this, the main element with the rib elements can have the at least one laterally protruding additional element. At least one protruding additional element is preferably arranged on both sides of the elongate main element.
  • the main element preferably has a plurality of additional elements on both sides, in particular arranged parallel to one another, which are arranged in particular perpendicular to the main element and thus to the longitudinal direction of the reinforcement device.
  • the at least one additional element can alternatively or additionally be arranged at an angle between greater than zero degrees and less than 90 degrees to the main element.
  • the at least one additional element has at least one side main element. This extends in a longitudinal direction of the additional element.
  • the longitudinal direction of the additional element preferably corresponds to a transverse direction of the reinforcement device, which is arranged perpendicular to the longitudinal direction of the reinforcement direction.
  • the side main element is therefore preferably arranged perpendicularly to the main element.
  • the at least one side main element can alternatively or additionally be arranged at an angle between greater than zero degrees and less than 90 degrees to the main element.
  • the additional element preferably has a plurality of main side elements arranged parallel to one another.
  • the at least one additional element has a plurality of side rib elements connected to the at least one main side element and arranged parallel to the longitudinal direction of the at least one elongate reinforcement device.
  • the side rib elements can be arranged like the rib elements of the main element to the side main element.
  • a longitudinal alignment of the individual rib elements is preferably arranged parallel to the longitudinal direction of the reinforcement device.
  • the side rib elements preferably form a lattice together with the plurality of side main elements.
  • the additional element preferably lies entirely in a plane parallel to the front and rear of the reinforcement device.
  • the at least one additional element preferably serves to reinforce the underrun protection device by connecting a respective additional element of a first reinforcement device to precisely one additional element of a second reinforcement device, with the first and second reinforcement devices being arranged adjacent to one another.
  • the associated auxiliary members are arranged on an equal position in the longitudinal direction of the reinforcement means.
  • a lattice is then formed from the plurality of reinforcement devices, the longitudinal struts of which are formed by the main elements and the transverse struts by the additional elements.
  • a channel for the pressure hose is preferably formed between two adjacent side rib elements, so that the pressure hose can be coupled to the front side of the reinforcement device in such a way that it is coupled to the at least one main side element in the area of the at least one additional element by being positioned between the adjacent side rib elements .
  • the pressure hose can, for example, snap in between the adjacent side rib elements.
  • the pressure hose is then positioned along the longitudinal direction of the reinforcement device, preferably to the side of the main element but parallel to it and is coupled between the adjacent side rib elements to the at least one side main element and thus to the front side of the reinforcement device.
  • a further embodiment provides that the pressure hose is positively connected to the front side of the elongate reinforcement device.
  • the pressure hose is preferably connected in a form-fitting manner to the front side of the elongate reinforcement device in a region of the rib elements.
  • a positive connection is a connection that is created by the interlocking of at least two connection partners. As a result, the connection partners cannot become detached from one another even without power transmission or when power transmission is interrupted.
  • Two components are often connected to one another in a form-fitting manner, with a third part acting as a connecting element, as is the case, for example, when two overlapping sheet metal edges are connected using rivets or screws.
  • At least one corresponding connecting element can be provided on the pressure hose and/or the elongate reinforcement device for a form-fitting connection.
  • the at least one connecting element is designed so that there is a fixed or a detachable connection between the pressure hose and the at least one elongate reinforcement device.
  • the connecting element can be fastened to the pressure hose and designed in such a way that it can reach into the spaces between the ribs and/or the side rib elements or can be clamped onto the ribs and/or the side rib elements. Intermeshing teeth can therefore be realized between the pressure hose and the reinforcement device.
  • the pressure hose is then preferably non-positively connected to the front side of the elongate reinforcement device in a region of the rib elements.
  • the pressure hose is non-positively connected to the front side of the elongated reinforcement device in a region of the at least one side main element of the at least one protruding additional element, in particular between two adjacent side rib elements.
  • a non-positive connection is a connection in which displacement of the connected elements is prevented as long as a counterforce caused by static friction is not exceeded.
  • a non-positive connection can therefore alternatively be referred to as a frictional connection.
  • the pressure hose is firmly connected to the front side of the elongate reinforcement device and therefore cannot, for example, be displaced relative to the reinforcement device or the individual rib elements and/or the individual side rib elements and the elongate main element. This ensures that the effect of an external on the always reliable
  • Reinforcement device is connected, in particular in a region of the rib elements and / or in a region of the at least one
  • a material connection between the pressure hose and the front of the elongated Reinforcement device may be provided. All connections in which the connection partners are held together by atomic or molecular forces are referred to as material connections, which are usually non-detachable connections that can only be separated by destroying the connection means.
  • an adhesive is applied to the pressure hose and/or the front side of the elongate reinforcement device, in particular to the individual rib elements of the reinforcement device.
  • this also means that the pressure hose is fixed firmly in the underride protection device relative to the elongate reinforcement device and thus cannot slip or be deformed unintentionally.
  • the underride protection device comprises a total of at least five elongate reinforcement devices. These are arranged side by side at a predetermined distance in a transverse direction of the underrun protection device.
  • the individual elongate reinforcement devices are preferably arranged parallel to one another.
  • the individual elongate reinforcement devices are arranged side by side in such a way that they do not touch and/or overlap one another.
  • the predetermined distance between the reinforcement devices is preferably between 20 and 25 centimeters. Alternatively it may be between 5 and 20 centimetres, or larger than 25 centimetres, for example up to 50 centimetres.
  • Individual chambers are thus formed between the individual reinforcement devices, in which neither a pressure hose nor a reinforcement device are arranged. Air is preferably present in these chambers.
  • the underride protection device Viewed in a vertical direction of the underride protection device, it thus initially comprises the flat base element, the at least five elongated reinforcement devices arranged on it and the pressure hose arranged on these in turn.
  • the preferred installation position is in the vertical direction above the vertical direction of the underrun protection and thus above the pressure hose the battery housing or the other component of the motor vehicle.
  • the individual chambers are then delimited in the vertical direction by a housing base of the battery housing or an outer wall of the other component. If this is the case, the individual chambers represent cavities within the motor vehicle. In the case of the at least five elongate reinforcement devices described, at least four such chambers are thus formed.
  • the two outer reinforcement means each have rib members only on the side of the respective main elongate member facing the other reinforcement means.
  • the outer reinforcement devices thus each have only the elongated main element, whereas the rib elements are only arranged on the side of the two outer reinforcement devices directed toward an interior of the underride protection device.
  • the at least three elongate reinforcement members located between the outer two reinforcement members each have rib members on either side of the respective main elongate member. A total of eight sides of reinforcement devices are therefore provided, which have rib elements, whereas the two outer reinforcement devices are designed without rib elements.
  • Exactly one pressure hose with a pressure sensor is coupled to each of the sides with rib elements of the at least five elongate reinforcement devices.
  • the underrun protection device described has at least eight separate pressure hoses, each of which is coupled to a pressure sensor, so that a total of at least eight individual pressure sensors are provided.
  • the individual pressure hoses are each preferably arranged on the underrun protection device without curves and only extend along exactly one of the elongated reinforcement devices in the area of the respective rib elements.
  • An overall length of the respective pressure hose therefore preferably corresponds to at least an overall length of an elongate one reinforcement device.
  • the underrun protection device may include precisely one sensor which determines the pressure change in precisely this one pressure hose.
  • Exactly one pressure hose can be arranged, for example, in a serpentine manner over a number of elongate reinforcement devices.
  • the underrun protection device can comprise a total of three or four reinforcement devices, in which case only one or two reinforcement devices, for example, are then arranged between the two outer reinforcement devices.
  • the underride protection device comprises a total of at least three elongate reinforcement devices, which are arranged at a predetermined distance from one another in the transverse direction of the underride protection device.
  • Each of the at least three reinforcement devices has a plurality of additional elements projecting laterally from the elongate main element, which are each arranged in the longitudinal direction of the elongate reinforcement device at a predetermined longitudinal distance from one another and on both sides of the elongate main element. Any two of the protruding attachments of adjacent elongate reinforcement means are interconnected.
  • the additional elements are preferably connected to one another without a transition, in particular in such a way that a transition from an end of the respective additional element of one reinforcement device that faces away from the main element to the end of the respective additional element of the adjacent reinforcement device that faces away from the main element is visually and/or haptically unobtrusive and in particular only on intensive examination of the transition can be seen.
  • Precisely one individual pressure hose is preferably provided on both sides of the respective elongate main element, which in particular runs parallel to the respective elongate main element. Each pressure hose is coupled between two adjacent side rib elements with the respective additional element and with its own pressure sensor.
  • the respective pressure hose is not coupled to the reinforcement device, but lies, for example, freely between the reinforcement device and the base element.
  • the respective pressure hose can rest on the base element at least in certain areas.
  • the described arrangement of the pressure hoses has the advantage that they are only arranged in certain areas above the reinforcement device and thus a corresponding signal recognizing the effect of the force can be provided by the pressure sensor even when the force acting on the base element is low, compared to the arrangement of the pressure hoses in the area of the rib elements of the main elements. This increases the area of application of the force in which, in principle, an increase in hose pressure can be determined by means of the under-protection device.
  • Reinforcing device remote from additional elements are each coupled with at least two pressure hoses, which are spaced apart between the two adjacent side rib elements are arranged. So it can be provided, for example, an edge region of the underrun protection device in which, although no
  • the battery device according to the invention with an underride protection device comprises a battery with a battery housing and at least one battery module arranged in the battery housing.
  • the battery housing has a housing base that is arranged parallel to the flat base element of the underrun protection device.
  • the pressure hose is arranged in a cavity between the flat base element and the housing floor.
  • the at least one elongate reinforcement device which is coupled to the flat base element, is arranged in the cavity.
  • the battery arrangement is designed for this purpose when a force acts on the flat base element that is greater than a predetermined
  • the minimum force is to exert the force on the hose jacket of the pressure hose by pressing the pressure hose against the bottom of the housing. It is therefore designed so that when sufficient force is applied, the pressure hose is pressed against the bottom of the housing.
  • the battery arrangement is also designed to use the pressure sensor to detect the increase in hose pressure caused by the force acting on the hose jacket
  • the underrun protection device In the preferred installation position of the underrun protection device in the motor vehicle, this is part of the battery arrangement in the motor vehicle.
  • the pressure hose In the preferred installation position, the pressure hose is deformed under the action of force when the flat base element with the elongated reinforcement device is pressed overall in the direction of the battery housing, in which case the corresponding action of force can be detected by the deformation of the pressure hose by means of the pressure sensor.
  • the battery assembly is suitable for use in a motor vehicle by means of the underride protection device the impact of a Detect object on the flat base element and provide a corresponding measured value.
  • the invention also includes developments of the battery arrangement according to the invention, as have already been described in connection with the developments of the underrun protection device according to the invention.
  • the underride protection device includes an evaluation device. If the underrun protection device comprises at least five reinforcement devices, eight pressure hoses and eight pressure sensors, the evaluation device is designed to determine a local deformation, which is caused by the force, using a pressure measurement value selection criterion on the pressure measurement values provided by each of the pressure sensors.
  • the deformation of a body such as the underrun protection device, means a change in a shape of the body as a result of the action of an external force. Alternatively, the deformation can also be referred to as deformation or distortion.
  • the underrun protection device is deformed by the force acting on the underrun protection device, which is greater than the predetermined minimum force action. Typically, when this force is applied, the flat base element and possibly also at least one of the elongate reinforcement devices are deformed, for example when the object impacts the underrun protection device.
  • the evaluation device can be designed to calculate a deformation value that quantifies the local deformation due to the action of the force by applying the pressure measurement value evaluation criterion to the pressure measurement values provided by each of the pressure sensors. Appropriate regulations for this are stored in the pressure measurement value evaluation criterion.
  • the deformation value preferably includes information about a deformation state of the underride protection device.
  • the deformation value can include, for example, the information by what length Underrun protection device was deformed in the direction of the force. Alternatively or additionally, it can be provided that the length of the deformation can be calculated from the deformation value using a corresponding evaluation criterion and/or the pressure measurement value evaluation criterion.
  • the length of the deformation quantifies a distance between a relative position of the flat basic element in an initial situation before the impact of the object to the relative position of the flat basic element in the area of the impact of the object after the impact of the object has taken place.
  • the relative position here refers to the position relative to at least one other component of the battery arrangement, such as the battery housing, and/or in the preferred installation position of the battery arrangement in the motor vehicle, the position relative to a component of the motor vehicle external to the battery arrangement.
  • the length of the deformation thus indicates how far the flat base element was pressed into an interior space of the underrun protection device by the action of force.
  • the local deformation can be understood to mean the information by how much the underrun protection device was deformed inwards.
  • the length of the deformation can be viewed as dependent on the strength of the force.
  • a local strength of the applied force can be determined and evaluated as a measure of the deformation.
  • a local differentiation of the force effect in a transverse direction of the underride protection device is understood here as local strength of the force effect. Since several pressure hoses are provided in the transverse direction of the underrun protection device in the described embodiment, it is possible to differentiate at least in the transverse direction by appropriate evaluation of the several measured pressure values, where the force was applied, i.e. where the impact of the object took place.
  • Coupling the individual measurement data with one another that is, for example, by offsetting the pressure measurement values provided with one another in accordance with a corresponding regulation stored in the pressure measurement value evaluation criterion, can thus, for example, infer the location of the force action.
  • This Location information differentiates preferably only in the longitudinal direction of the underrun protection device.
  • the arrangement of pressure sensors in the underride protection device can be chosen such that in the longitudinal direction a location-dependent differentiation of the force is possible, in particular a location-dependent differentiation of the deformation and thus ultimately the strength of the force on the flat base element.
  • the determination of the local deformation due to the force is ultimately based on the recorded volume change in the pressure hoses, which is measured using the pressure changes in the individual pressure hoses. This enables a particularly reliable and spatially resolved detection of the impact of the object.
  • the described determination of the deformation is also possible in the case of an underride protection device with fewer than five reinforcement devices and/or fewer than eight pressure hoses and/or, for example, at least two pressure sensors.
  • the evaluation device can always be provided as a component of the underride protection device and/or the battery arrangement, independently of a number of pressure hoses and pressure sensors. If only one pressure sensor is provided in the underrun protection device, the pressure measurement value evaluation criterion can be applied by the evaluation device to the one pressure measurement value provided by the pressure sensor in order to also determine the deformation caused by the force acting on the flat base element.
  • the pressure measurement value selection criterion can contain specifications as to the depth of deformation that is to be expected for the pressure measurement values provided due to the effect of the force that has taken place.
  • the evaluation device is designed to compare measured pressure values of the pressure sensors of two adjacent pressure hoses in each case when the pressure measured value evaluation criterion is applied. The measured pressure values of pressure hoses arranged directly next to one another can therefore be compared with one another. If, for example, an object hits the underrun protection device in the middle between two pressure hoses and the force is therefore acting in the middle of one of the chambers between two booster devices, two approximately equal pressure readings are measured in the adjacent pressure sensors.
  • the information obtained by evaluating the pressure measurement values provided can be taken into account, for example, when determining a reaction to the detected impact of the object, so that it can be decided, for example, whether an immediate emergency stop of the motor vehicle is necessary or whether information or a warning to the driver is given, at least for the time being enough. This ultimately enables a reliable estimation of the consequence of the impact of the object on the underrun protection device, the battery arrangement and the motor vehicle as a whole.
  • the motor vehicle according to the invention has a battery arrangement as described above.
  • the motor vehicle has a Underrun protection device, as described above.
  • the motor vehicle according to the invention is preferably designed as a motor vehicle, in particular as a passenger car or truck, or as a passenger bus or motorcycle.
  • the method according to the invention is designed to detect an impact of an object on the underride protection device of a motor vehicle.
  • the method is therefore intended for detecting the impact of the object with a battery arrangement as described above. If the impact of the object causes the force on the underrun protection device to be greater than the specified minimum force, the force is exerted on the hose jacket of the pressure hose and the resulting change in hose pressure is recorded by the pressure sensor. This ultimately determines and provides the measured pressure value associated with the increase in hose pressure.
  • the invention also includes developments of the motor vehicle according to the invention and the method according to the invention, which have features as have already been described in connection with the developments of the underride protection device according to the invention and/or the battery arrangement according to the invention. For this reason, the corresponding developments of the motor vehicle and method according to the invention are not described again here.
  • the evaluation device for the battery arrangement and/or the underrun protection device also belongs to the invention.
  • the evaluation device can have a data processing device or a processor device that is set up to carry out an embodiment of the method according to the invention and/or the battery arrangement according to the invention.
  • the processor device can have at least one microprocessor and/or at least one microcontroller and/or at least one FPGA (Field Programmable Gate Array) and/or at least one DSP (Digital Signal Processor) have.
  • the processor device can have program code which, when executed by the processor device, is set up to carry out the embodiment of the method according to the invention and/or the battery arrangement according to the invention.
  • the program code can be stored in a data memory of the processor device.
  • the invention also includes the combinations of features of the described embodiments.
  • the invention also includes implementations that each have a combination of the features of several of the described embodiments, unless the embodiments were described as mutually exclusive.
  • FIG. 1 shows a schematic representation of a motor vehicle with a battery arrangement and an underrun protection device
  • FIG. 2 shows a plan view of an underrun protection device with five reinforcement devices with rib elements
  • FIG. 3 shows a cross section of an underride protection device in a preferred installation position
  • FIG. 4 shows a cross section of an underrun protection device in a preferred installation position in the event of an impact with an object
  • FIG. 5 shows a top view of a section of a reinforcement device with a lattice-like structure
  • FIG. 6 shows a perspective view of a section of an underride protection device with a reinforcement device with additional elements; and 7 shows a top view of an underrun protection device with three
  • the battery arrangement 12 comprises an underrun protection device 14 and a battery 16, which is designed as a flat-voltage battery.
  • the battery 16 in turn comprises a battery housing 18 with a housing base 18a and a plurality of battery modules 20 arranged in the battery housing 18.
  • Each of these battery modules 20 in turn comprises a plurality of battery cells 22, only three of which are shown as an example.
  • the underrun protection device 14 is arranged below the battery 16 in a vehicle vertical direction (z direction).
  • the underrun protection device 14 is also attached to the underside of the motor vehicle 10, for example screwed.
  • the underrun protection device 14 is also flat and can, for example, extend over a large part of the area between two wheel axles 24 of the motor vehicle 10 in a vehicle longitudinal direction (x-direction) and over a large part of a vehicle width in a vehicle transverse direction (y-direction).
  • 2 shows a plan view of the underrun protection device 14.
  • the underrun protection device 14 comprises a flat base element 26, at least one elongate reinforcement device 28 and at least one pressure hose 30.
  • a total of five elongate reinforcement devices 28 are shown here, which are arranged parallel to one another at a predetermined distance. This parallel arrangement being aligned in a transverse direction of underride protection device 14, which in a preferred installation position of underrun protection device 14 in motor vehicle 10 corresponds to the vehicle transverse direction, ie the y-direction.
  • a longitudinal direction of the respective elongate reinforcement devices 28 corresponds to an underride protection longitudinal direction and in the preferred installation position in motor vehicle 10 to the vehicle longitudinal direction, ie the x-direction.
  • the underrun protection device 14 has a total of eight pressure hoses 30 here.
  • a single pressure hose 30 can be provided, which is connected to an upper or lower end of the elongate reinforcement device 28 in the x-direction. This results in a pressure hose 30 that extends in a serpentine manner over the entire underride protection device 14.
  • the underrun protection device 14 also has at least one pressure sensor 32 .
  • a total of eight pressure sensors 32 are sketched here, with each individual pressure hose 30 sketched being assigned a single pressure sensor 32 .
  • the underrun protection device 14 also has an evaluation device 34 .
  • the three central reinforcement devices 28 each have the rib elements 42 on both sides.
  • an area A of the underrun protection device 14 is marked in FIG. 2 .
  • FIG. 3 A cross section of the underrun protection device 14 in area A is sketched in FIG. 3 . From this cross section, the precise structure of the underride protection device 14 is outlined in a vertical direction of the underride protection device 14, which corresponds to the vertical direction of the vehicle in the preferred installation position, ie the z-direction. It can be seen that the elongate reinforcement device 28 has a front side 36 and a back side 38 opposite the front side 36 . The rear side 38 of the reinforcement device 28 is coupled to the planar base element 26, these being connected directly to one another, for example, by means of an adhesive connection. Alternatively, the reinforcement device 28 and the planar base element 26 can be formed as a single component. The elongate reinforcement device 28 and the flat base element 26 are preferably made of a fiber composite material, in particular comprising glass and/or carbon.
  • the elongate reinforcement means 28 includes an elongate main member 40 having a plurality of rib members 42 disposed laterally thereto.
  • the rib members 42 are disposed parallel to the front 36 and back 38 of the elongate reinforcement means 28 and on two opposite sides 44 of the main elongate member 40 .
  • the individual rib elements 42 are preferably formed perpendicularly to the longitudinal direction of the elongate main element 40, ie perpendicularly to the x-direction and thus in the y-direction.
  • Two pressure hoses 30 are arranged here in the z-direction above the elongated reinforcement device 28 .
  • This pressure hoses 30 are either form-fitting or bonded to the front face 36 of the elongate reinforcement means 28 in the area of the rib members 42 by means of an adhesive bond.
  • a recess can be provided in a surface of the rib elements 42, for example, into which the pressure hose 30 can be inserted with a precise fit. It is ultimately relevant here that the pressure hose 30 is firmly connected to the reinforcement device 28 in the area of the rib elements 42 so that the pressure hose 30 cannot be displaced relative to the remaining components of the underride protection device 14 .
  • the pressure hoses 30 each have a predetermined hose volume 46 and a predetermined hose pressure within the pressure hose 30 .
  • Each of the pressure hoses 30 is designed to reduce the hose volume 46 when a force acts on a hose jacket 48 of the pressure hose 30 and to increase the hose pressure. This increase in hose pressure can be detected by the pressure sensor 32 . This then provides a measured pressure value describing the increase in hose pressure.
  • the underrun protection device 14 is delimited by the housing base 18a of the battery housing 18 in the vertical direction.
  • the housing base 18a can directly adjoin the pressure hoses 30.
  • a predetermined spacing can also be provided between the housing floor 18a and the pressure hoses 30, as is sketched here in FIG.
  • a cavity 50 is thus formed between the flat base element 26 with the elongate reinforcement device 28 arranged thereon and the pressure hoses 30 and the housing base 18a.
  • FIGS. 2 and 3 viewed together that the pressure hose 30 extends at least partially along the longitudinal direction of the elongate reinforcement device 28 and is coupled and preferably connected to the front side 36 thereof.
  • FIG. 4 the cross section of area A sketched in Fig. 3 is sketched again, but this time in a situation in which a force 52 is observed on the underrun protection device 14, namely by an object 54 being pressed against the flat base element 26 .
  • the object 54 impacts the underride protection device 14 here. This impact causes a plastic deformation of the base element 26 and the elongated reinforcement device 28 arranged on it.
  • the force 52 is greater than a predetermined minimum force, so that the force on the hose jacket 48 of the pressure hose 30 is exerted, since the pressure hose 30 or here both pressure hoses 30 are pressed against the housing bottom 18a of the battery housing 18 by the deformation of the base element 26 and the reinforcing device 28 .
  • Evaluation device 34 is designed to use a pressure measurement value evaluation criterion to determine the pressure measurement values provided by pressure sensor 32 or the total of eight individual pressure sensors 32 shown in Fig. 2, a local deformation due to the effect of force 52, for example by determining the strength of the effect of force 52 .
  • the pressure measurement value evaluation criterion When applying the pressure measurement value evaluation criterion, the pressure measurement values of the pressure sensors 32 of two adjacent pressure hoses 30 are compared with one another. If these pressure hoses 30, which are adjacent to one another, are located, for example, on two chamber sides of a respective chamber, two measured pressure values would be expected that are approximately the same size if the object 54 were to press against the flat base element 26 exactly in the middle in the area of this chamber. If the object 54, as sketched in FIG.
  • FIG. 5 shows a section of an elongate reinforcement device 28 with a lattice-like structure, ie a lattice structure shape.
  • a reinforcement device 28 can be provided in the underrun protection device 14 as an alternative or in addition to the reinforcement devices 28 shown in FIGS.
  • the elongate reinforcing means 28 with the lattice-like structure has at least two elongate main elements 40, namely a total of three elongate main elements 40, which are arranged parallel to one another.
  • a plurality of transverse elements 56 are arranged perpendicularly to the flap elements 40, only one of which is marked in FIG.
  • the individual transverse elements 56 are formed parallel to one another. Overall, the flap elements 40 and the transverse elements 56 form a lattice structure.
  • a pressure hose 30 can be arranged between each two adjacently arranged flap elements 40, the longitudinal direction of which can be arranged parallel to the longitudinal direction of the flap elements 40, ie in the x-direction.
  • the pressure hose 30 is then arranged in a region of the transverse elements 56 on the front side 36 of the reinforcement device 28 .
  • the area of the transverse elements 56 can thus correspond to the area of the rib elements 42 .
  • the rib elements 42 described above are thus replaced here in FIG. 5 by the transverse elements 56 .
  • FIG. 6 shows a perspective view of a section of the underrun protection device 14 in which the reinforcement device 28 has a plurality of additional elements 60 in addition to the flap element 40 with the rib elements 42 .
  • the respective additional element 60 is formed laterally from the elongated Flauptelement 40 as a protruding element, it preferably protrudes at a right angle to the main element 40 from the main element 40 into an area surrounding the reinforcement device 28 .
  • the additional element 60 each has at least one main side element 62, preferably a plurality of main side elements 62 arranged parallel to one another.
  • the side rib elements 64 each preferably extend in their longitudinal direction parallel to the longitudinal direction of the main element 40.
  • the multiple additional elements 60 of a reinforcement device 28 are preferably each of the same design, so that a straight line running through one of the side rib elements 64 in the longitudinal direction of the reinforcement device 28 runs through corresponding side rib elements 64 of the additional elements 60 arranged adjacent in this longitudinal direction.
  • a channel is thus formed between two side rib elements 64 in each case, which channel extends parallel to the main element 40 along the longitudinal direction of the reinforcement device 28 .
  • the pressure hose 30 can be coupled to the front side 36 of the reinforcement device 28 . This is because the pressure hose is coupled to the reinforcement device 28 at the corresponding areas of the main side element 62 between the two side rib elements 64 delimiting the channel.
  • the pressure hose 30 can be positively connected to the front side 36 of the elongated reinforcement device 28 in a respective area of the main side element 62 of the at least one protruding additional element 60, in particular between the two adjacent side rib elements 64.
  • the pressure hose 30 can be connected there by means of the adhesive connection to the front side 36 of the elongate reinforcing means 28 may be connected.
  • FIG. 7 outlines a plan view of the underrun protection device 14, which has three reinforcement devices 28, as shown in FIG.
  • the three reinforcement devices 28 therefore have additional elements 60 .
  • more than three reinforcement devices 28 with additional elements 60 can be provided.
  • the three reinforcement devices 28 are arranged at a predetermined distance from one another in a transverse direction of the underrun protection device 14, ie in the y-direction. A cavity is therefore provided between the individual reinforcement devices 28 .
  • Each of the reinforcement devices 28 has a plurality of the additional elements 60 projecting laterally from the elongate main element 40 . A total of seven additional elements 60 are provided here for each reinforcement device 28 .
  • the longitudinal spacing may correspond to the spacing between the reinforcement devices 28 .
  • Each two of the protruding additional elements 60 of adjacent elongate reinforcement devices 28 are seamlessly connected to one another. Therefore, no transition between the individual additional elements 60 can be seen in FIG. 7 . Overall, therefore, a lattice is formed from the main elements 40 in the longitudinal direction and the lateral main elements 62 in the transverse direction.
  • Exactly one individual pressure hose 30 can be coupled to the reinforcement device 28 on both sides next to the respective elongate main element 40 in the area of the additional elements 60 .
  • a pressure hose 30 may be placed in the underrun protection device 14 in a serpentine manner.
  • the individual pressure hose 30 or a part of the pressure hose 30 runs parallel to the respective elongate main element 40 and is coupled to the side main elements 62 of the respective additional element 60 between two adjacent side rib elements 64 in each case.
  • Each individual pressure hose 30 is preferably coupled to its own pressure sensor 32 .
  • a plurality of pressure hoses 30 can be coupled to a common pressure sensor 32 .
  • the two outer reinforcement devices 28 are each coupled to at least two pressure hoses 30 in the area of the additional elements 60, which faces away from the other reinforcement devices 28. which are spaced from each other between the two adjacent side rib elements 64 are arranged. Two pressure hoses 30 are thus arranged next to one another in each case at the edge region of the underrun protection device 14 in the transverse direction.
  • the corresponding additional elements 60 preferably reach up to the lateral edge of the battery housing 18 in the transverse direction.
  • the basic element 26 and the additional element 60 and/or the main element 40 can be plastically deformed upon impact of the object, with the pressure hose 30 then being pressed against the housing base 18a of the battery housing 18 at the corresponding point of the underride protection device 14 and ultimately the corresponding pressure reading can be provided.
  • the measured pressure value can be evaluated analogously to the procedure described above.
  • the examples show an underrun protection with rib reinforcement, ie the underrun protection device 14 with the elongate reinforcement devices 28 which each have the rib elements 42 .
  • the individual pressure hoses 30 are attached to the underride protection itself in a form-fitting manner and optionally via an adhesive connection, namely to the elongated reinforcement device 28.
  • Deformation and deformation of the underride protection device 14 in the area of the flat base element 26 and the elongated reinforcement device 28 arranged thereon lead to a pressure change in the pressure hose 30, which is measurable. This is due to a change in volume in the pressure hose 30 caused by the pressure change.
  • an impact depth or a deformation depth can be determined, since the local deformation of the underrun protection device 14 is ultimately determined by the application of the force 52 by the evaluation device 34 using the pressure measurement value evaluation criterion.
  • Underrun protection device 14 therefore has a pressure hose 30 with an external cross section for detecting forces 52 acting on it, and at least part of elongated reinforcement device 28 with rib element 42 is arranged along the extension of pressure hose 30 and at least partially encompasses its external cross section.
  • a plurality of elongated reinforcement devices can form a grid on which the pressure hose 30 is arranged in the area of the additional elements 60 .
  • the at least one pressure hose 30 forms a hermetically sealed system with the optional use of further hose and/or pipeline elements, with the pressure sensor 32 being provided for detecting any pressure fluctuations in this hermetically sealed system.
  • the evaluation device 34 is designed to use the pressure fluctuations detected by the at least one pressure sensor 32 to infer the force 52 acting on the underrun protection device 14 .

Abstract

L'invention concerne un dispositif de protection anti-encastrement (14) pour un véhicule automobile (10), un ensemble batterie (12), un véhicule automobile (10) et un procédé. Le dispositif de protection anti-encastrement (14) comprend un élément principal plan (26), un appareil de renforcement allongé (28) qui est accouplé à l'élément principal (26), et un tuyau sous pression (30). À la fois le volume et la pression du tuyau sous pression (30) sont influencés lors de l'application d'une force. Le dispositif de protection anti-encastrement (14) comprend également un capteur de pression (32) qui est conçu pour détecter l'augmentation de la pression du tuyau et pour fournir une valeur de pression mesurée représentant l'augmentation de la pression du tuyau. Au moins une partie du tuyau sous pression est disposée dans une direction longitudinale dudit au moins un appareil de renforcement allongé (28) et accouplée à une face avant (36) de l'appareil de renforcement (28). Lors de l'application d'une force (52) sur l'élément principal (26), laquelle force est supérieure à une application de force minimale spécifiée, une force est exercée sur une chemise (48) du tuyau sous pression (30), ce qui conduit finalement à une augmentation de la pression détectée au moyen du capteur de pression (32).
PCT/EP2022/055285 2021-04-26 2022-03-02 Dispositif de protection anti-encastrement, ensemble batterie, véhicule automobile et procédé de détection d'une collision d'un objet avec un ensemble batterie WO2022228753A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102021110567 2021-04-26
DE102021110567.6 2021-04-26
DE102021116864.3A DE102021116864B3 (de) 2021-04-26 2021-06-30 Unterfahrschutzvorrichtung, Batterieanordnung, Kraftfahrzeug und Verfahren zum Erfassen eines Aufpralls eines Objekts mit einer Batterieanordnung
DE102021116864.3 2021-06-30

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006040216A1 (de) 2005-09-05 2007-03-08 Denso Corp., Kariya Kollisionsermittlungssystem
EP2887446A1 (fr) * 2013-12-18 2015-06-24 Atieva, Inc. Procédé et appareil de détection de dommages du bloc-batterie
DE102014203255A1 (de) 2014-02-24 2015-08-27 Volkswagen Aktiengesellschaft Vorrichtung und Verfahren zur Erfassung eines Seitenaufpralls eines Objektes auf eine Fahrzeugtür eines Kraftfahrzeugs
FR3084322A1 (fr) * 2018-07-24 2020-01-31 Psa Automobiles Sa Dispositif de protection d’une batterie de vehicule, a detection de dommage
DE102018129158A1 (de) 2018-11-20 2020-05-20 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Sicherheitsvorrichtung für eine Batterie
DE102019119996A1 (de) * 2019-07-24 2021-01-28 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Batterieabstützung für eine Traktionsbatterie eines Kraftfahrzeugs

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006040216A1 (de) 2005-09-05 2007-03-08 Denso Corp., Kariya Kollisionsermittlungssystem
EP2887446A1 (fr) * 2013-12-18 2015-06-24 Atieva, Inc. Procédé et appareil de détection de dommages du bloc-batterie
DE102014203255A1 (de) 2014-02-24 2015-08-27 Volkswagen Aktiengesellschaft Vorrichtung und Verfahren zur Erfassung eines Seitenaufpralls eines Objektes auf eine Fahrzeugtür eines Kraftfahrzeugs
FR3084322A1 (fr) * 2018-07-24 2020-01-31 Psa Automobiles Sa Dispositif de protection d’une batterie de vehicule, a detection de dommage
DE102018129158A1 (de) 2018-11-20 2020-05-20 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Sicherheitsvorrichtung für eine Batterie
DE102019119996A1 (de) * 2019-07-24 2021-01-28 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Batterieabstützung für eine Traktionsbatterie eines Kraftfahrzeugs

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