WO2021259664A2 - Élément de mesure de résistance et circuit de mesure d'intensité pourvu d'un tel élément de mesure de résistance - Google Patents

Élément de mesure de résistance et circuit de mesure d'intensité pourvu d'un tel élément de mesure de résistance Download PDF

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Publication number
WO2021259664A2
WO2021259664A2 PCT/EP2021/065712 EP2021065712W WO2021259664A2 WO 2021259664 A2 WO2021259664 A2 WO 2021259664A2 EP 2021065712 W EP2021065712 W EP 2021065712W WO 2021259664 A2 WO2021259664 A2 WO 2021259664A2
Authority
WO
WIPO (PCT)
Prior art keywords
measuring element
resistance
resistance measuring
press
current
Prior art date
Application number
PCT/EP2021/065712
Other languages
German (de)
English (en)
Other versions
WO2021259664A3 (fr
Inventor
Aurelian Kotlar
Florin-Constantin BERINDE
Mihaita GIREADA
Radu Bunea
Sebastian Taubert
Ana Maria CALUSERIU
Gratian-Avrintie JURCA
Original Assignee
Vitesco Technologies GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vitesco Technologies GmbH filed Critical Vitesco Technologies GmbH
Publication of WO2021259664A2 publication Critical patent/WO2021259664A2/fr
Publication of WO2021259664A3 publication Critical patent/WO2021259664A3/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
    • G01R1/203—Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/12—Arrangements of current collectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/06—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material including means to minimise changes in resistance with changes in temperature

Definitions

  • An engine block 1 is shown schematically, which is intended to have four cylinders, for example, and, since it consists of electrically conductive metal, forms a reference potential for some consumers in the form of an engine block mass 4.
  • An exhaust manifold 2 is arranged on the engine block 1 and ends in an exhaust pipe in which an electrically heatable catalytic converter 3 is installed.
  • the heating of the electrically heatable catalytic converter 3 is supplied by a catalytic converter control unit 5 and regulated to a predetermined temperature.
  • the catalytic converter control unit 5 is supplied by a first voltage source 7, which in the example shown is a 48 V battery.
  • the catalytic converter control unit 5 is electrically connected to the metallic exhaust system and via this to the metallic engine block 1 and is therefore primarily electrically related to the engine block mass 4.
  • three further control units 6 with the designations ECU1, ECU2 and ECU3 are shown, which are operated with a lower voltage of, for example, 14 V, which is provided by a second voltage source 8.
  • the low potentials of the first voltage source 7 and the second voltage source 8 are connected to one another and to the vehicle body, the vehicle body forming a body ground 9.
  • a first control unit ECU1 and a third control unit ECU3 of the further control units 6 are electrically related to this body mass 9, while a second control unit ECU2 of the further control units 6 is electrically related to the engine block mass 4.
  • a sensor element 11 which is located on Engine block 1 is installed and can, for example, measure its temperature and is also connected to the first control unit ECU1 in order to make its output signals available to it.
  • This sensor element 11 is thus also related to the engine block mass 4.
  • the engine block mass 4 and the body mass 9 are in principle at the same potential, but both the engine block 1 and the vehicle body are made of iron, steel or partially aluminum , which are not particularly good conductors, so that there is a non-zero resistance between these two reference potentials, which can lead to a not inconsiderable voltage drop and thus a potential difference between these two grounds 4, 9 in the case of high currents flowing through it .
  • the heating of the electrically heatable catalytic converter 3 is operated with a current from the first voltage source 7 of a few hundred amperes, this current, as indicated by a dashed line 13 in FIG Manifold 2 and the engine block 1 and the connection between the engine block and the body mass 10 flow back to the lower potential of the first voltage source 7.
  • a voltage drop 12 then arises at the connection between the engine block 1 and the body mass, which can assume a not inconsiderable value. However, this can impair the operation of the control devices and sensor elements connected to the second voltage source 8 and the engine block ground 4, in particular they can also be damaged as a result.
  • DE 102018 114 115 A1 proposes that a current measurement be carried out both in the line leading from the voltage supply to the consumer and in the line leading from the consumer back to the voltage supply, in particular by using current measuring resistors, and to feed the voltage drop across these current measuring resistors to an evaluation circuit, which determines whether there is a difference between the currents and, if so, concludes that there must be a shunt, since part of the current takes a different route.
  • FIG. 3 schematically shows such a procedure described in DE 102018 114 115 A1, using the example of a catalytic converter control device 5 that is intended to supply the heating of an electrically heatable catalytic converter 4 on the one hand and regulate the temperature of the catalytic converter 4 on the other hand.
  • a microprocessor is used for this purpose, which is referred to below as an evaluation unit Micro, since only this property is relevant for the present invention.
  • a supply current IIM is fed to the catalytic converter control device 5 of FIG. 3 from the first voltage source 7, not shown here, which in normal operation should flow back to the first voltage source 7 as the same current.
  • the catalytic converter control device 5 provides an outward current IEHCC_FWD derived therefrom to the heater of the catalytic converter 4, which flows back as a return current IEHCC_BACK.
  • both this outward current IEHCC_FWD and the return current IEHCC_BACK are measured, with customary measurement methods, which can be implemented by means of a shunt resistor, a Hall sensor or a current mirror, being used for the outgoing current IEHCC_FWD, while a current measuring resistor R P is used for the present invention should find.
  • the voltage drop V drop is determined via this current measuring resistor R P and fed to the evaluation unit Micro.
  • Such current measuring resistors must be able to carry high currents of a few hundred amperes and therefore have a robust design, while they still have to have a precise resistance value in order to be able to convert the current into the voltage to be measured with corresponding precision.
  • EP 0605 800 A1 discloses a cuboid resistance element which is formed in its edge areas with a highly conductive metal, for example copper, and in its middle area with a resistance material with a defined resistance value.
  • This resistance element is soldered onto contact surfaces on a circuit carrier substrate, the current to be measured either also being fed to the resistance element via these contact surfaces or via additional high-current connection terminals attached to the edge areas of the resistance element. Since this resistance element is made of three parts that have to be brought together precisely, and additional connection elements have to be attached, its production is complex. In addition, when soldering the resistor element to contact surfaces of a circuit carrier substrate, care must be taken that this connection is also extremely low-resistance and reproducible, so that the unavoidable resistance cannot falsify the measurement.
  • the object of the invention is therefore to provide a simplified resistance measuring element that is easy to manufacture and easy to assemble.
  • Fig. 1 shows a consumer arrangement in a motor vehicle with two
  • FIG. 2 shows the same consumer arrangement with an alternative ground line routing
  • FIG. 3 shows a control device for supplying a high-current consumer with measuring resistors
  • FIG. 4 shows a current measuring element 20 according to the invention, which is designed as an elongated element and has a first one at both ends Power connection 21 or a second power connection 22 is provided.
  • these first and second high-voltage connections 21, 22 are oriented perpendicular to the longitudinal direction of the resistance measuring element, but they can also be oriented in any other direction.
  • the resistance measuring element 20 is provided with first press-fit pins 23, which are primarily used for mechanical fixation, and according to the invention with second ones Press-fit pins 24 which are formed on the resistance measuring element at a defined distance from one another.
  • the resistance measuring element between the two second press-in pins 24 not only has a defined length, but also a defined cross-sectional area, so that a resistance value results therefrom and from the known resistance material of the resistance measuring element 20.
  • the second press-in pins 24, which are integrally formed on the resistance measuring element 20, advantageously not only enable the resistance measuring element to be mechanically fastened to a circuit carrier substrate, but at the same time also determine the resistance value and establish an electrical, clearly defined contact with the circuit carrier substrate.
  • the resistance measuring element 20 can be designed in a particularly advantageous manner as a punched element and can therefore be manufactured very easily.
  • a temperature sensor 26 which is connected to the evaluation unit Micro, is arranged in accordance with the invention according to FIG. 3 on the circuit carrier substrate adjacent to the resistance measuring element R P is designed in a manner according to the invention, for example with the aid of a characteristic diagram, to precisely determine the resistance value and thus the current value from the measured voltage as a function of the measured temperature.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

L'invention concerne un élément de mesure de résistance (20) qui est constitué d'un matériau métallique allongé, des connecteurs de courant fort (21, 22) étant conçus dans la zone située aux extrémités dudit élément, et qui est pourvu, sur un côté à relier à un substrat porte circuit, d'au moins deux broches d'insertion (24) qui sont destinées à la mesure de tension et sont disposées à une distance définie les unes des autres, le matériau métallique entre les broches d'insertion (24) ayant une section transversale définie et une résistance spécifique donnée. L'invention concerne également un circuit de mesure d'intensité pourvu d'un tel élément de mesure de résistance (20) et d'un capteur de température (26).
PCT/EP2021/065712 2020-06-24 2021-06-10 Élément de mesure de résistance et circuit de mesure d'intensité pourvu d'un tel élément de mesure de résistance WO2021259664A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP20465539.3 2020-06-24
EP20465539 2020-06-24
DE102020207874.2 2020-06-25
DE102020207874.2A DE102020207874B4 (de) 2020-06-24 2020-06-25 Strommessschaltung mit einer Auswerteeinheit und einem Widerstandsmesselement

Publications (2)

Publication Number Publication Date
WO2021259664A2 true WO2021259664A2 (fr) 2021-12-30
WO2021259664A3 WO2021259664A3 (fr) 2022-02-17

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2021/065712 WO2021259664A2 (fr) 2020-06-24 2021-06-10 Élément de mesure de résistance et circuit de mesure d'intensité pourvu d'un tel élément de mesure de résistance

Country Status (2)

Country Link
DE (1) DE102020207874B4 (fr)
WO (1) WO2021259664A2 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0605800A1 (fr) 1992-12-21 1994-07-13 Isabellenhütte Heusler GmbH KG Résistances en matériel composite et procédé pour leur fabrication
DE102018114115A1 (de) 2018-06-13 2019-12-19 Schaeffler Technologies AG & Co. KG Vorrichtung zur Erkennung eines Fehlerstromes in einem eine Steuereinheit aufweisenden Aktor eines Fahrzeuges

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3595431B2 (ja) * 1997-04-25 2004-12-02 ナイルス株式会社 電流検出抵抗体及び車載ユニット
DE102005057117A1 (de) 2005-11-30 2007-06-14 Siemens Ag Vorrichtung zum Erfassen einer elektrischen Größe eines Akkumulators und Verfahren zur Herstellung derselbigen
EP2942631B1 (fr) 2014-04-28 2024-03-06 TYCO ELECTRONICS AMP KOREA Co., Ltd. Ensemble de capteur de courant hybride
JP6842823B2 (ja) * 2015-06-22 2021-03-17 Koa株式会社 電流検出用抵抗器
DE102015216789A1 (de) 2015-09-02 2017-03-02 Continental Automotive Gmbh Anschlussvorrichtung zum Anschließen eines Messgerätes an einen Anschlusspol eines Energiespeichers eines Kraftfahrzeugs
DE112018007828T5 (de) 2018-07-12 2021-03-25 HELLA GmbH & Co. KGaA Elektrische Sensoranordnung, umfassend ein Shuntwiderstandselement
JP7193941B2 (ja) 2018-07-26 2022-12-21 Koa株式会社 シャント抵抗器およびそれを用いた電流検出装置
DE102019203496B3 (de) * 2019-03-14 2020-07-16 Te Connectivity Germany Gmbh Passiver Stromsensor mit vereinfachter Geometrie

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0605800A1 (fr) 1992-12-21 1994-07-13 Isabellenhütte Heusler GmbH KG Résistances en matériel composite et procédé pour leur fabrication
DE102018114115A1 (de) 2018-06-13 2019-12-19 Schaeffler Technologies AG & Co. KG Vorrichtung zur Erkennung eines Fehlerstromes in einem eine Steuereinheit aufweisenden Aktor eines Fahrzeuges

Also Published As

Publication number Publication date
DE102020207874A1 (de) 2021-12-30
DE102020207874B4 (de) 2023-11-23
WO2021259664A3 (fr) 2022-02-17

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