CN113670184A - Measuring device and motor vehicle - Google Patents

Measuring device and motor vehicle Download PDF

Info

Publication number
CN113670184A
CN113670184A CN202110527209.3A CN202110527209A CN113670184A CN 113670184 A CN113670184 A CN 113670184A CN 202110527209 A CN202110527209 A CN 202110527209A CN 113670184 A CN113670184 A CN 113670184A
Authority
CN
China
Prior art keywords
electrode
measuring device
energy storage
housing
protective cover
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110527209.3A
Other languages
Chinese (zh)
Inventor
M·特米尔
J·劳施
B·梅勒库施
O·门德
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Audi AG
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
Application filed by Audi AG filed Critical Audi AG
Publication of CN113670184A publication Critical patent/CN113670184A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/04—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving
    • G01B7/042—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving for measuring length
    • G01B7/044—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving for measuring length using capacitive means
    • 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
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/66—Arrangements of batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/20—Floors or bottom sub-units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/20—Floors or bottom sub-units
    • B62D25/2072—Floor protection, e.g. from corrosion or scratching
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/14—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring distance or clearance between spaced objects or spaced apertures
    • 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • 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
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • 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
    • H01M50/24—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 adapted for protecting batteries from their environment, e.g. from corrosion
    • 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
    • H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2250/00—Driver interactions
    • B60L2250/10—Driver interactions by alarm
    • 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

Abstract

The invention relates to a measuring device comprising a control unit (3), an energy storage housing (4) having a first electrode (5), and a protective cover (6) having a second electrode (7), the protective cover (6) being arranged on the energy storage housing (4) and at least partially spaced apart from the bottom side of the energy storage housing (4) in order to form at least one cavity (12), the first electrode (5) and the second electrode (7) being arranged spaced apart from one another and at least partially opposite one another, the control unit (3) being connected to the first electrode (5) and the second electrode (7), the control unit (3) being designed to determine a measurement value which describes a distance measure between the first electrode (5) and the second electrode (7).

Description

Measuring device and motor vehicle
Technical Field
The invention relates to a measuring device comprising a control unit, an energy storage housing having a first electrode, and a protective cover having a second electrode, which protective cover is arranged on the energy storage housing and is at least partially spaced apart from the bottom side of the energy storage housing to form at least one cavity. The invention also relates to a motor vehicle.
Background
The energy storage housing serves for accommodating one or more energy storage modules of an energy storage device, and for example for securely arranging an energy storage device for a power cell on or in a motor vehicle, which energy storage device comprises one or more battery modules. The energy storage module arranged inside the energy storage housing is protected by the energy storage housing and/or the other cover against external influences, which may occur, for example, during operation of the motor vehicle. It is desirable to be able to determine the state of the energy storage housing and/or of the cover of the energy storage housing, for example in order to be able to provide an output for the operational reliability of the energy storage accommodated in the energy storage housing. Various methods for determining component damage are known from the prior art.
EP 2887446 a1 describes a method and a device for detecting damage in a battery device. The device uses a plurality of cooling channels disposed between the underside of the battery and the underside cover of the battery device. In the event of a force acting on the cover, the cooling channel can absorb this force and partially deform. Due to the deformation of the cooling channel, the coolant flow and/or the coolant pressure in the channel may change, which is determined by one or more sensors, so that conclusions can be drawn about the damage of the cover or the cooling channel.
WO2015/075313a1 describes a measuring device for determining damage in a structure. The measuring device comprises three or more capacitive electrodes and a measuring device to determine the capacitance between the electrodes. By means of this structure, the water ingress of the monitored structure can be determined, wherein the change in capacitance due to the higher dielectric constant of water than the monitored structure is determined via the capacitive electrodes.
A battery housing for a motor vehicle is known from FR 3081393 a1, wherein the battery housing comprises a pressure sensor which is arranged inside the housing and determines an internal pressure. The pressure sensor is connected to a measuring circuit which compares the measured internal pressure with a limit value and issues an alarm when the limit value is exceeded.
Disclosure of Invention
The object of the present invention is therefore to provide an improved measuring device which makes it possible to determine damage to the energy storage housing and/or to a protective cover associated with the energy storage housing, in particular with a structure which is as simple as possible.
In order to achieve this object, according to the invention, a first electrode and a second electrode are arranged spaced apart from and at least partially opposite each other, a control unit is connected to the first electrode and the second electrode, the control unit being configured to determine a measurement value which describes a measure of the distance between the first electrode and the second electrode.
The protective cover can be arranged, for example, on the bottom side of the energy storage housing, so that the energy storage housing can be advantageously used in a motor vehicle, wherein the energy storage housing or the energy storage module arranged therein is protected from damage caused from below during operation of the motor vehicle by the protective cover on the bottom side of the energy storage housing. The protective cover, which can be used in particular as underbody protection for a motor vehicle, is at least partially spaced apart from the underside of the energy accumulator housing to form at least one cavity, so that a deformation of the protective cover can at least partially enter the cavity. Such deformation may occur due to forces acting on the protective cover, for example, in the event of a collision of the vehicle with a passing obstacle or object.
By the proposed determination of the measured value, which describes a measure of the distance between the first electrode and the second electrode, according to the invention, the control unit advantageously achieves that damage caused by deformation of the protective cover and/or the energy storage housing is determined by the determined distance. For example, the distance may decrease into the cavity due at least in part to deformation of the protective cover. In addition to being used in motor vehicles, the measuring device can also be used advantageously in other devices where there is a risk of damage to the energy storage housing and/or the protective cover. The measuring device, which may also be referred to as an energy storage device, comprises a control unit, which is designed to determine a measured value, an energy storage housing and a protective cover.
As a measure describing a measure of the distance between the first electrode and the second electrode, a capacitance can be determined, wherein the capacitance describes a plate capacitor formed by the first electrode and the second electrode, which is spaced apart from and at least partially opposite the first electrode. In addition to the dielectric constant of the medium between the first and second electrodes and the electrode area, the capacitance depends on the distance between the electrodes. An increase in the capacitance of the capacitor formed in particular by the first electrode and the second electrode is caused, for example, by a deformation of the protective cover and thus by a decrease in the distance which occurs when the second electrode approaches the first electrode. The distance or the change in distance can thus be determined from the determined or measured capacitance.
The cooling channel of the energy storage housing can extend over the bottom side of the energy storage housing, so that, in particular by determining the distance between the protective cover and the bottom side of the energy storage housing, it is possible to identify when the cooling channel is damaged or at least for reasons of fear of such damage occurring. Advantageously, this makes it possible to take appropriate measures to take into account possible damage in order to prevent further damage to the energy storage, for example a high-voltage battery, arranged in the energy storage housing, for example in the event of leakage due to damage to the cooling channel.
In a preferred embodiment of the invention, it can be provided that the first electrode is a housing base of the energy storage housing. At least the housing bottom of the energy storage housing can be made of or at least partially comprise an electrically conductive metal, so that the housing bottom can be used as the first electrode. This has the advantage that the first electrode can be realized easily through the bottom of the housing, so that further components for forming the first electrode can be omitted. The housing bottom is at least partially electrically conductive and is connected to the control unit via, for example, at least one wire. The housing bottom can comprise a base plate, in particular a base plate made of a metal plate. The housing base can also have a base plate and a cover plate arranged thereon, wherein at least one cooling channel is formed at least in sections between the cover plate and the base plate, the cover plate being embodied in particular as a metal plate having a specific profile in cross section.
In a preferred embodiment of the invention, it can be provided that the first electrode comprises at least one electrode element, wherein the electrode element is arranged on a housing base of the energy storage housing. The at least one electrode element is electrically conductive and is also connected to the control unit via, for example, one lead wire, respectively. The determination of the distance or of the measured value representing the distance measure can be carried out individually for each electrode of the first electrodes or together for all electrode elements. The first electrode may comprise only the at least one electrode element, or the first electrode may comprise both the housing bottom and the at least one electrode element.
According to the invention, it can be provided for the electrode element to be electrically insulated from the housing base. It is thereby possible to achieve that, when using a first electrode which is formed by at least one electrode element, the first electrode is electrically insulated from the housing bottom, so that the housing bottom itself is not influenced, for example, by the voltage which is applied to the electrode element for determining the measured value. This solution is particularly effective if it is desired to isolate the voltage present between the first and second electrodes from the bottom of the housing in order to determine the measured value.
According to the invention, it can be provided that the electrode element is arranged on the side of the housing base facing the protective cover. The electrode element can be arranged in particular in the region of a cavity formed between the bottom side of the energy storage device housing and the protective cover, so that the electrode element arranged on the housing bottom is at least partially spaced apart from the second electrode arranged in the protective cover via the cavity. Thus, the deformation of the protective cover into the cavity, for example, can be determined by determining a measurement describing a measure of the distance between the first electrode and the second electrode.
According to the invention, it can be provided that the electrode element is water-tight with respect to the cavity, in particular that the electrode element has a water-tight coating and/or a water-tight protective covering. Thus, if the region between the shield and the energy storage housing when the energy storage housing is mounted is a wet region and moisture can penetrate between the shield and the energy storage housing, damage to the electrode element can advantageously be avoided. This solution may occur, for example, when the measuring device is used in a motor vehicle, wherein the energy storage device housing is arranged on the underside of the motor vehicle and the protective cover is arranged below the energy storage device housing and fastened thereto as a underbody protection for the motor vehicle.
According to the invention, it can be provided that the second electrode is arranged parallel or substantially parallel to the bottom side of the energy storage housing. In particular, the second electrode extends over an area/region which at least substantially corresponds to the bottom of the housing, so that a locally occurring deformation of the protective cover, where the protective cover is only locally stressed, can be determined from the measured values, in particular the change in the capacitance values of the plate capacitor formed by the first electrode and the second electrode.
In a preferred embodiment of the invention, it can be provided that the second electrode is a conductive layer arranged on or in the protective cover. The second electrode may in particular extend over the entire area of the protective cover or at least substantially over the entire area of the protective cover. The electrically conductive layer can be arranged, for example, on the side of the cover of the protective cover facing the bottom side of the energy storage housing, wherein the second electrode can in particular have a water-tight coating and/or a water-tight protective cover. The conductive layer can also be arranged in the cover of the protective cover, so that the conductive layer is surrounded by the cover, in particular on all sides.
According to the invention, it can be provided that the protective cover is at least partially made of a fiber composite material; and/or the second electrode is or comprises in particular a perforated metal foil, a metal fiber mesh and/or a metal fabric. The use of a metal foil, a metal fiber mesh and/or a metal fabric, in particular perforated, which is arranged inside the cover body of the protective cover formed from the fiber composite material advantageously allows the upper and lower parts of the cover body, between which the second electrode is arranged, to be well connected to each other during the manufacturing of the protective cover. The second electrode may be arranged below the cover layer of the cover body, so that the second electrode is arranged in a watertight manner with respect to the cavity formed between the protective cover and the bottom of the housing, and the second electrode may be prevented from coming into contact with water.
According to the invention, it can be provided that the control unit is designed to generate a warning message as a function of a determination of a measured value that falls below or exceeds at least one limit value. The warning message may be transmitted, for example, to another control unit and/or to a display device connected to the control unit. This warning message can be used, for example, to indicate that the energy storage housing may have been damaged and/or that a motor vehicle comprising the measuring device should be brought to a workshop for inspection and/or repair. By using at least one limit value, it is possible to avoid that a warning is issued already in case of slight variations in distance, which for example represent only slight deformations and thus slight damage of the protective cover. In particular, it can be provided that the use exceeds a limit value, so that different phases of the distance or of the deformation and/or damage to the protective cover and/or the energy storage housing can be detected. The limit value or values may be stored, for example, in a memory device of the control unit.
The motor vehicle arrangement according to the invention comprises a measuring device according to the invention. The energy storage housing can be arranged in particular on the underside of the motor vehicle. The control unit of the measuring device can be a separate control unit or can be integrated in a common control unit with another control unit of the motor vehicle.
According to the invention, it can be provided that the protective cover is a underbody protection of the motor vehicle. The underbody protection can be arranged on the underside of the motor vehicle, in particular in an externally accessible manner. With such underbody protectors, there is a risk of damage or deformation of the underbody protector, for example in the event of an accident or when driving over a high obstacle (such as a bollard, a curb, etc.), in particular in the event of severe damage or severe deformation of the underbody protector, it is also possible for the energy accumulator housing, in particular the cooling channel arranged on the underside of the energy accumulator housing, to be damaged.
All the advantages and embodiments described above with respect to the measuring device according to the invention are also correspondingly applicable to the motor vehicle according to the invention.
Drawings
Further advantages and details of the invention emerge from the exemplary embodiments described below and with reference to the drawings. These are schematic and show:
figure 1 shows a side view of a motor vehicle according to the invention,
figure 2 shows a first view of an energy storage housing of a measuring device according to the invention,
figure 3 shows a top view of a protective cover of a measuring device according to the invention,
figure 4 shows a first embodiment of a measuring device according to the invention,
fig. 5 shows a detailed view of a first embodiment of a measuring device according to the invention, an
Fig. 6 shows a second embodiment of the measuring device according to the invention.
Detailed Description
Fig. 1 shows a side view of a motor vehicle 1 according to the invention. The motor vehicle 1 comprises a measuring device 2, which comprises a control unit 3, an energy storage housing 4 with a first electrode 5, and a protective cover 6 with a second electrode 7. The protective cover 6 is a underbody protection of the motor vehicle 1 and is arranged on the underside of the energy storage housing 4. The control unit 3 is connected to the first electrode 5 and the second electrode 7 via at least one conductor line, respectively. In the energy storage housing 4, a power battery of the motor vehicle 1 is arranged, via which a power motor (not shown) of the motor vehicle 1 can be driven.
Fig. 2 shows a detailed view of the energy storage housing 4. The energy storage housing 4 comprises a frame 8 consisting of a plurality of frame elements 9, 10 and a housing bottom 11 arranged below the frame. The protective cover 6, which is designed as an underbody protection, is fixed to the frame elements 9, 10 of the frame 8. Between the protective cover 6 and the housing base 11, in each case in the region between the frame elements 9, a cavity 12 is formed, via which the protective cover 6 is spaced apart from the housing base. The energy accumulator housing 4 can be fastened to the motor vehicle, for example, via a fastening element 13 embodied as a threaded connection. In this example, the frame elements 9, 10 of the frame 8 are embodied as hollow profiles and are made of metal. The housing bottom 11 is also at least partially made of metal and can serve as the first electrode 6 of the measuring device 2.
In fig. 3, a view of the bottom side of the housing is shown. The protective cover 6 is arranged parallel to the housing bottom 11 and has at least substantially the same dimensions as the housing bottom 11. In this embodiment, the protective cover 6 has a width of 1.5m and a length of 2.2 m. The protective cover 6 is screwed on the edge side to the frame elements 9, 10 of the frame 8 and is thereby fixed to the energy storage housing 4.
Fig. 4 shows a partial view of a first embodiment of a measuring device 2 according to the invention. As described above, the measuring device comprises the control unit 3 as well as the energy storage housing 4 and the protective cover 6. An energy storage module 14 accommodated in the energy storage housing 4 is also shown. In this embodiment, the protective cover 6 comprises a cover 15 made of a fiber composite material, and comprises a second electrode 7 arranged inside the cover 15. The second electrode 15 is implemented as a perforated metal foil. Alternatively, the second electrode 7 can also be embodied as a metal fiber mesh or a metal fabric, or in particular as a combination of perforated metal foil, metal fiber mesh and/or metal fabric. The second electrode 7 is arranged parallel to the housing bottom 11 and extends substantially over an area corresponding to the housing bottom 11. In this embodiment, the case bottom 11 arranged to be spaced apart from and opposed to the second electrode 7 is used as the first electrode.
As shown in detail in fig. 5, the housing bottom 11 comprises a base plate 21 and a cover plate 17. A plurality of cooling channels 16 are defined by a cover plate 17 arranged on a base plate 21. Alternatively to this, it is possible that the housing bottom only comprises the base plate 21 and therefore no cooling channels 16 are present, or that the cooling channels are formed in a separate component arranged on the housing bottom 11.
The base plate 21 and/or the cover plate 17 of the housing bottom 11 are made of sheet metal and have a thickness of 0.5mm to 2mm, in particular 1mm or 1.3mm, respectively. A gap filler or gap pad, for example, having a thickness of between 0.3mm and 0.5mm, in particular 0.4mm, can be arranged between the housing base 11 and the battery module 14 arranged thereon in order to improve the thermal connection of the battery module 14 to the housing base 11. In the region of the cooling channels 16, the maximum distance of the cover plate from the base plate can be between 4mm and 5mm, in particular 4.5 mm.
As shown in fig. 4, when a force acts on the protective cover 6 (indicated by arrow 18), the second electrode 7 in the protective cover 6 approaches the first electrode formed by the housing bottom 11. This approach can be determined by measuring the capacitance by the control unit 3, which is connected to the first electrode 5 and the second electrode 7. The capacitance of the plate capacitor formed by the first electrode 5 and the second electrode 7 is related to the distance between the first electrode 5 and the second electrode 7, in addition to the dielectric constant of the medium in the cavity 12 and the area of the first electrode 5 and the second electrode 7.
One or more limit values are stored in the control unit 3, so that if at least one of the limit values is exceeded or is undershot, the control unit 3 can generate a warning message and transmit it to another control unit and/or a display device connected to the control unit 3. By using a plurality of limit values, for example, the strength of deformation or the strength of the damaging effect of the protective cover 6 or the battery case 4 can be classified, wherein a warning message relating to the classification can be output.
Fig. 6 shows a second embodiment of a measuring device 2 according to the invention. This second exemplary embodiment essentially corresponds to the first exemplary embodiment, but the housing base 11 is replaced by a plurality of electrode elements 19 arranged on the cover 17 of the housing base 11 as the first electrode 5. Additionally or alternatively, one or more electrode elements 20 can also be used as first electrodes 5, which are arranged between the cooling channels 16 or directly on the base plate 21 of the housing base 11. The electrode element 19 or 20 is arranged to be electrically insulated from the housing bottom 11 and is water-tight sealed with respect to the cavity 12. For this purpose, the electrode element 19 or 20 has a water-tight coating on its side facing the protective cover 6. In addition to or as an alternative to the waterproof coating, the electrode element 19 or 20 may also have a waterproof protective covering, respectively, so that the electrode element is protected against corrosion when water penetrates into the cavity 12, which is a moist space when the motor vehicle is in operation.
The electrode elements 19 and/or 20 are each connected to the control unit 3, wherein a measurement value, for example a capacitance, can be determined jointly for all electrode elements 19 or 20 by the control unit 3, and/or wherein the control unit 3 determines a measurement value for each electrode individually, which measurement value is a measure of the distance between the first electrode 5 and the second electrode 7. For this purpose, the electrode elements 19, 20 each comprise at least one line (not shown), with which they are each connected to the control unit 3.

Claims (13)

1. A measuring device comprises a control unit (3), an energy storage housing (4) having a first electrode (5), and a protective cover (6) having a second electrode (7), the protective cover (6) being arranged on the energy storage housing (4) and at least partially spaced apart from a bottom side of the energy storage housing (4) to form at least one cavity (12), the first electrode (5) and the second electrode (7) being arranged spaced apart from each other and at least partially opposite each other, the control unit (3) being connected to the first electrode (5) and the second electrode (7), the control unit (3) being configured to determine a measurement value which describes a measure of a distance between the first electrode (5) and the second electrode (7).
2. The measuring device according to claim 1, characterized in that the first electrode (5) is a housing bottom (11) of the energy storage housing (4).
3. The measuring device according to claim 1 or 2, characterized in that the first electrode (5) comprises at least one electrode element (19, 20), the electrode element (19, 20) being arranged on the housing bottom (11) of the energy storage housing (4).
4. A measuring device according to claim 3, characterized in that the electrode elements (19, 20) are electrically insulated from the housing bottom (11).
5. Measuring device according to claim 3 or 4, characterized in that the electrode elements (19, 20) are arranged on the side of the housing bottom (11) facing the protective cover (6).
6. Measuring device according to claim 5, characterized in that the electrode element (19, 20) is watertight with respect to the cavity (12), in particular the electrode element (19, 20) has a watertight coating and/or a watertight shield.
7. A measuring device according to any one of the preceding claims, characterized in that the second electrode (7) is parallel or substantially parallel to the bottom side of the accumulator housing (4).
8. A measuring device according to any one of the preceding claims, characterized in that the second electrode (7) is a conductive layer arranged on the protective cover (6) or a conductive layer arranged in the protective cover (6).
9. A measuring device as claimed in claim 7, characterized in that the protective cover (6) is at least partly composed of a fibre composite material; and/or the second electrode (7) is or comprises, in particular is perforated, a metal foil, a metal fiber mesh and/or a metal fabric.
10. Measuring device according to one of the preceding claims, characterized in that the control unit (3) is configured to generate a warning message after the determined measurement value falls below or exceeds at least one limit value.
11. A motor vehicle comprising a measuring device (2) according to any of the preceding claims.
12. Motor vehicle according to claim 11, characterized in that the energy storage housing (4) accommodates a power battery of the motor vehicle (1).
13. Motor vehicle according to claim 11 or 12, characterized in that the protective cover (6) is a underbody protection of the motor vehicle (1).
CN202110527209.3A 2020-05-13 2021-05-10 Measuring device and motor vehicle Pending CN113670184A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020112992.0 2020-05-13
DE102020112992.0A DE102020112992A1 (en) 2020-05-13 2020-05-13 Measuring device and motor vehicle

Publications (1)

Publication Number Publication Date
CN113670184A true CN113670184A (en) 2021-11-19

Family

ID=78280490

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110527209.3A Pending CN113670184A (en) 2020-05-13 2021-05-10 Measuring device and motor vehicle

Country Status (2)

Country Link
CN (1) CN113670184A (en)
DE (1) DE102020112992A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101325249A (en) * 2008-07-25 2008-12-17 雷天电池技术有限公司 Casing of lithium ion battery with composite structure
CN201663182U (en) * 2009-07-14 2010-12-01 吉安市优特利科技有限公司 Power battery outer casing
DE102014217511A1 (en) * 2014-09-02 2016-03-03 Robert Bosch Gmbh Battery cell module with an arrangement for protection against moisture
WO2017045776A1 (en) * 2015-09-18 2017-03-23 Lithium Energy and Power GmbH & Co. KG Energy storage device
CN208819975U (en) * 2018-02-27 2019-05-03 创科（澳门离岸商业服务）有限公司 Soft-package battery with safety protection function

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143212A (en) 1976-10-18 1979-03-06 Tokyo Shibaura Electric Co., Ltd. Sealed storage battery
DE102005051117A1 (en) 2005-10-24 2007-04-26 Hydrometer Gmbh Communication-interface for e.g. flow meter, has capacitance electrodes that are arranged at different positions of modules, such that coupling capacitor is formed between modules for data transmission, by adjacent arrangement of modules
JP2013012441A (en) 2011-06-30 2013-01-17 Sanyo Electric Co Ltd Electric power source device and vehicle including the same
FI20136160L (en) 2013-11-21 2015-05-22 Outotec Finland Oy Device and procedure for assessing maintenance needs
US9306247B2 (en) 2013-12-18 2016-04-05 Atieva, Inc. Method of detecting battery pack damage
DE102018204374A1 (en) 2018-03-22 2019-09-26 Bayerische Motoren Werke Aktiengesellschaft High-voltage battery for a motor vehicle with a detection device for detecting damage to the high-voltage battery, method for detecting damage to the high-voltage battery and motor vehicle
DE102018206600A1 (en) 2018-04-27 2019-10-31 Volkswagen Aktiengesellschaft Electrically driven motor vehicle and frame-like component for mounting to the body of an electrically driven motor vehicle
DE102018208017A1 (en) 2018-05-22 2019-11-28 Sgl Carbon Se Energy storage protected by a composite material
FR3081393B1 (en) 2018-05-25 2022-01-14 Psa Automobiles Sa VEHICLE BATTERY DAMAGE DETECTION DEVICE
DE102018212565B3 (en) 2018-07-27 2019-09-12 Bayerische Motoren Werke Aktiengesellschaft High-voltage battery with monitoring device and motor vehicle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101325249A (en) * 2008-07-25 2008-12-17 雷天电池技术有限公司 Casing of lithium ion battery with composite structure
CN201663182U (en) * 2009-07-14 2010-12-01 吉安市优特利科技有限公司 Power battery outer casing
DE102014217511A1 (en) * 2014-09-02 2016-03-03 Robert Bosch Gmbh Battery cell module with an arrangement for protection against moisture
WO2017045776A1 (en) * 2015-09-18 2017-03-23 Lithium Energy and Power GmbH & Co. KG Energy storage device
CN208819975U (en) * 2018-02-27 2019-05-03 创科（澳门离岸商业服务）有限公司 Soft-package battery with safety protection function

Also Published As

Publication number Publication date
DE102020112992A1 (en) 2021-11-18

Similar Documents

Publication Publication Date Title
US5880951A (en) Capacitor-type power supply unit
CN107123837B (en) Battery module
US11703313B2 (en) Detection device for detecting a deformation of a housing of a high-voltage accumulator of a motor vehicle
US9310348B2 (en) Submergence detecting device
US9276296B2 (en) Sensor device and method for determining a pressure of a medium located inside an electrochemical energy store, electrochemical energy store, and method for the manufacture thereof
CN107834125A (en) Traction battery and the vehicle with such battery
JP7268095B2 (en) Battery system and electric vehicle
US20230411672A1 (en) Electric Energy Store
KR101808769B1 (en) Battery module
CN111337201A (en) Liquid leakage detection device, battery module and battery pack thereof
KR20120108260A (en) Battery pack of improved safety
JPH08185896A (en) Abnormality detection device for storage battery
CN113670184A (en) Measuring device and motor vehicle
JP6199723B2 (en) Battery pack, battery pack cell swell detection system, power storage device, and automobile
CN210202177U (en) Temperature detection structure of FPC (flexible printed circuit) cable bar
EP4115468A1 (en) Device and method for monitoring cells arranged side by side
US11025051B2 (en) Electronic control unit
CN214152991U (en) Thermal runaway detection unit for battery module and battery module
US20230318058A1 (en) Cell Module Having a Measuring Device for Detecting Deformation and Damage of a Cell Module Frame
EP3435445B1 (en) Trigger device, safety apparatus, electric energy store device and method for triggering a safety device for an electric energy store unit
US20220407164A1 (en) Battery arrangement for an electric vehicle
CN219892232U (en) Battery pack and vehicle
CN113479074B (en) Battery package structure, detecting system and vehicle
CN117083502A (en) Small deformation detection device for energy accumulator
JP5474744B2 (en) Fuel cell system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination