EP4536498A1 - Procédé de surveillance d'isolation pour un véhicule à commande électrique - Google Patents

Procédé de surveillance d'isolation pour un véhicule à commande électrique

Info

Publication number
EP4536498A1
EP4536498A1 EP23739142.0A EP23739142A EP4536498A1 EP 4536498 A1 EP4536498 A1 EP 4536498A1 EP 23739142 A EP23739142 A EP 23739142A EP 4536498 A1 EP4536498 A1 EP 4536498A1
Authority
EP
European Patent Office
Prior art keywords
insulation
vehicle
monitor
subgroup
level
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
EP23739142.0A
Other languages
German (de)
English (en)
Inventor
Bastian Blase
Steffen Jakobi
Göran SÄNGER
Markus Gyusok Schauen
Thomas Stark
Christer Thorén
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.)
Siemens Mobility GmbH
Scania CV AB
Original Assignee
Siemens Mobility GmbH
Scania CV AB
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 Siemens Mobility GmbH, Scania CV AB filed Critical Siemens Mobility GmbH
Publication of EP4536498A1 publication Critical patent/EP4536498A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • B60L3/0069—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to the isolation, e.g. ground fault or leak current
    • 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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/11—DC charging controlled by the charging station, e.g. mode 4
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/005—Testing of electric installations on transport means
    • G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks

Definitions

  • the invention relates to a method for insulation monitoring for an electrically operated vehicle, wherein the vehicle has a first plurality of insulation monitors and a second plurality of insulation levels, each insulation level having at least one power electronic component and/or a current-carrying component Component includes, and wherein an insulation measurement on at least one insulation level of the second plurality is carried out by at least one insulation monitor of the first plurality.
  • Insulation monitor installed in such a vehicle.
  • An insulation monitor applies a test voltage to the relevant insulation level for an insulation measurement.
  • insulation monitors are, for example, a main battery, a DC converter (or DC/DC converter), different isolating ground layers or (in overhead line vehicles) a pantograph (or current collector) as corresponding insulation levels or assigned to circuits. Further insulation levels can be provided in particular by further elements in the traction circuit of the vehicle.
  • the individual measurements can influence each other, and this can lead to malfunctions in the insulation monitors and thus to errors in the Insulation monitoring comes.
  • the above-mentioned errors or Disturbances occur accordingly more frequently or less frequently.
  • the insulation monitors at interfaces between the original components of the vehicle and third-party components from other manufacturers are particularly susceptible to failure, not least because of the possible assignment to correspondingly different control devices.
  • the invention is therefore based on the object of specifying a method by means of which insulation measurements can be carried out in an electrically operated vehicle with several insulation levels that are as free from interference as possible.
  • a method for insulation monitoring for an electrically operated vehicle which has a first plurality of insulation monitors and a second plurality of insulation levels, each insulation level having at least one power electronic component and/or a current-carrying component Component comprises, and wherein for a first time interval an inhibition signal is output to a first subgroup of the first plurality, which comprises at least one first insulation monitor, by a central control unit of the vehicle, which is in particular set up for central control of insulation measurements of the insulation levels .
  • isolation measurements by the insulation monitor(s) of the first subgroup are completely omitted, and that during the first time interval, at least temporarily, an insulation measurement is carried out on at least one isolation level of the second plurality by at least a second one I isolation monitor occurs, which is not part of the first subgroup.
  • An electrically operated vehicle includes in particular a purely electrically operated vehicle, but also a hybrid vehicle, which additionally has an internal combustion engine and/or a fuel cell.
  • the electrical energy for the electrical operation of the vehicle can be provided in particular by an overhead line and/or at least partially by a battery.
  • Isolation monitoring includes, in particular, the monitoring of an isolation state of the relevant isolation level, for example. based on an insulation resistance, which is preferably determined based on a test voltage applied to the relevant insulation level.
  • the vehicle has a first plurality of insulation monitors, each of which is set up to carry out an insulation measurement and/or for a delimited area of a circuit in the vehicle, preferably for an insulation detection. level, to measure an insulation state and in particular an insulation resistance.
  • the vehicle has a second plurality of insulation levels, with each insulation level comprising at least one power electronic component and/or a current-carrying component, in particular of the traction circuit, and/or a ground component.
  • a power electronic component can be provided by a battery (as the main power source or as a power buffer), or even a DC converter;
  • a current-carrying component can also be provided in particular by a current collector.
  • a mass component can in particular be provided by a metallic component in the vehicle such as. B. a vehicle frame, etc. ä .
  • the second plurality can be different or identical to the first plurality.
  • the insulation measurement is not carried out during the first time interval in the individual isolation levels, which are monitored by the insulation monitors of the first subgroup.
  • the first subgroup is preferably to be coordinated with the second insulation monitor in such a way that the first subgroup includes those insulation monitors which control the second insulation monitor at the same time or in quick succession could most likely influence insulation measurements (e.g. as a result of a lack of potential equalization between the insulation levels, which are each assigned to the relevant insulation monitors).
  • the first subgroup includes all isolation monitors, which are related to: The isolation level assigned to the second insulation monitor is assigned to insulation levels adjacent to it.
  • the reliability of the insulation measurement can be improved, and in particular a false positive rate (e.g. in terms of undershooting of minimum resistance values) can be reduced so that unjustified failures of the vehicle fleet can be significantly limited.
  • the periodic sequence of said time intervals for the assigned subgroups is selected such that an isolation level classified as safety-critical has a shorter monitoring interval than an isolation level not classified as safety-critical.
  • An isolation level can be classified as safety-critical in particular if there is a higher risk of contact or a higher risk of an initial error for the relevant components of the isolation level.
  • the first DC-DC converter 10 additionally supplies a battery 28 of the vehicle 1 with power.
  • the battery 28 is intended and set up to power the electric motors 12 in the event of a failure of the external energy supply (e.g due to an externally caused voltage drop or power failure in the overhead line 4).
  • the electric motors 12 as primary consumers, the first DC-DC converter 10, the individual secondary consumers 16 (as well as the second DC-DC converter 26) and the battery 28 are each assigned to individual insulation levels 30a to 30i, which ensure the electrical insulation of the relevant Components of the isolation level should be ensured against other components, apart from the technically intended power flow.
  • the introduction of the separate insulation levels 30a to 30i serves, among other things, the purpose of ensuring that no danger to persons occurs in the event of possible errors, such as galvanic connections to power-carrying components.
  • an inhibition signal 12 (dotted line) is output in an analogous manner from the central control unit 34 to a second subgroup G2 of the insulation monitors 32b to 32i (or to the assigned control devices 38b to 38i), so that through the said Insulation monitors 32b to 32i of the second subgroup G2 no insulation measurement is carried out at the corresponding insulation levels 30b to 30i during this second time interval AT2.
  • those insulation monitors that are not part of the second subgroup G2 can now carry out an insulation measurement on the assigned insulation level using the corresponding test voltage.
  • the first insulation monitor 32a can resume the insulation measurement Ma at the insulation level 30a (not shown).
  • insulation measurements can be carried out successively on all insulation levels 30a to 30i, with individual subgroups of these isolation levels being formed in such a way that the insulation monitors remaining outside the relevant subgroup can carry out their insulation measurement without being influenced by other insulation monitors.
  • the subgroups are configured so that for a specific insulation monitor that is to carry out an insulation measurement in a specific time interval, all other insulation monitors that could influence the said specific insulation monitor during the insulation measurement are included as part of the assigned subgroup can be defined, and therefore no insulation measurement can be carried out as a result of the inhibition signal.
  • a monitoring interval can be created for each individual isolation monitor (not shown) are defined as the entire period in which no insulation measurement is carried out by the insulation monitor in question. These monitoring intervals can also be specified for defining the time intervals and the associated subgroups of isolation monitors, each of which should receive an inhibition signal.
  • the specification can be done dynamically, for example depending on a driving speed, or whether a door of the vehicle is open (in this case it is preferred to reduce the monitoring interval for isolation levels, which include components in the vicinity of the door), or whether a component is generally safety-critical (here too, the monitoring interval for the associated isolation level should preferably be shorter than for isolation levels of non-safety-critical components).

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

L'invention concerne un procédé de surveillance d'isolation pour un véhicule à commande électrique (1), le véhicule (1) comprenant une première pluralité de moniteurs d'isolation (32a-32i) et une seconde pluralité de niveaux d'isolation (30a-30i), chaque niveau d'isolation (30a-30i) comprenant au moins un composant électronique de puissance et/ou un composant de transport de courant et/ou un composant de masse. Pour un premier intervalle de temps (ΔT1), une unité de commande centrale (34) du véhicule (1) délivre un signal d'inhibition (I1) à un premier sous-groupe (G1) de la première pluralité qui comprend au moins un premier moniteur d'isolation (32a). En conséquence du signal d'inhibition (I1) pendant le premier intervalle de temps (ΔT1), des mesures d'isolation (Ma) par le moniteur ou les moniteurs d'isolation (32a, 32c-32i) du premier sous-groupe (G1) ne sont pas du tout effectuées, et pendant le premier intervalle de temps (ΔT1), une mesure d'isolation (Mb) est au moins temporairement effectuée au niveau d'au moins un niveau d'isolation (30b) de la seconde pluralité par au moins un second moniteur d'isolation (32b) qui ne fait pas partie du premier sous-groupe (G1).
EP23739142.0A 2022-06-30 2023-06-28 Procédé de surveillance d'isolation pour un véhicule à commande électrique Pending EP4536498A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022206715.0A DE102022206715A1 (de) 2022-06-30 2022-06-30 Verfahren zur Isolationsüberwachung für ein elektrisch betreibbares Fahrzeug
PCT/EP2023/067678 WO2024003153A1 (fr) 2022-06-30 2023-06-28 Procédé de surveillance d'isolation pour un véhicule à commande électrique

Publications (1)

Publication Number Publication Date
EP4536498A1 true EP4536498A1 (fr) 2025-04-16

Family

ID=87196481

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23739142.0A Pending EP4536498A1 (fr) 2022-06-30 2023-06-28 Procédé de surveillance d'isolation pour un véhicule à commande électrique

Country Status (4)

Country Link
EP (1) EP4536498A1 (fr)
CN (1) CN119486901A (fr)
DE (1) DE102022206715A1 (fr)
WO (1) WO2024003153A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2679039B1 (fr) * 1991-07-09 1993-11-26 Merlin Gerin Dispositif de distribution d'energie electrique avec controle d'isolement.
DE102013226595A1 (de) * 2013-12-19 2015-06-25 Bender Gmbh & Co. Kg Vorrichtung zur Isolationsüberwachung
DE102014201044B3 (de) * 2014-01-21 2015-03-05 Bender Gmbh & Co. Kg Isolationsüberwachungsvorrichtung zur simultanen Überwachung von Netzabschnitten eines ungeerdeten Stromversorgungssystems
CN213689765U (zh) * 2020-11-10 2021-07-13 深圳市锐深科技有限公司 船用的绝缘监测调度系统

Also Published As

Publication number Publication date
CN119486901A (zh) 2025-02-18
WO2024003153A1 (fr) 2024-01-04
DE102022206715A1 (de) 2024-01-04

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Owner name: SCANIA CV AB

Owner name: SIEMENS MOBILITY GMBH