EP2691782A1 - Capteur de courant - Google Patents

Capteur de courant

Info

Publication number
EP2691782A1
EP2691782A1 EP12714274.3A EP12714274A EP2691782A1 EP 2691782 A1 EP2691782 A1 EP 2691782A1 EP 12714274 A EP12714274 A EP 12714274A EP 2691782 A1 EP2691782 A1 EP 2691782A1
Authority
EP
European Patent Office
Prior art keywords
current
resistance element
current sensor
sensor according
voltage
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.)
Withdrawn
Application number
EP12714274.3A
Other languages
German (de)
English (en)
Inventor
Wolfgang Jöckel
Klaus Rink
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.)
Continental Teves AG and Co OHG
Original Assignee
Continental Teves AG and Co OHG
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 Continental Teves AG and Co OHG filed Critical Continental Teves AG and Co OHG
Publication of EP2691782A1 publication Critical patent/EP2691782A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/005—Circuits for altering the indicating characteristic, e.g. making it non-linear
    • 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
    • G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
    • 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
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]

Definitions

  • the invention relates to a current sensor according to the preamble of claim 1.
  • the invention is based on the object of proposing a current sensor which can be used relatively inexpensively, in particular with a relatively large measuring range or with a relatively large dynamic range of the current to be measured.
  • An advantage of the invention is in particular that Various ⁇ ne current detection elements used in the current sensor who can ⁇ , for example, ohmic resistors and shunt or magnetic field sensor elements such as Hall sensor elements or AMR elements. It is preferred that the current sensor is formed such that the value detected by the current detection element load current is ge ⁇ measured by passing a current through the resistive element flows in dependence of the electrical Messsig ⁇ Nals and the voltage across the resistor element by an analog-digital converter is measured.
  • the riding ⁇ be supplied by the current detection element electrical measurement signal is substantially propor tional ⁇ to the load current through the electrical conductor which is to be detected and measured.
  • the signal processing unit preferably comprises Minim ⁇ least a control circuit with which the voltage across the resistive element is controlled to a defined reference voltage value, at least within a defined measurement range.
  • the defined reference voltage value is particularly preferably at least 1 mV.
  • the signal processing unit comprises an amplifier which amplifies the input side, the electrical measurement ⁇ signal and provides an output current flowing through the resistive element.
  • the signal processing unit is designed so that the percentage resolution of the current ⁇ measurement based on the current value of the load current over the defined measuring range of the current sensor, based on the current to be detected by the current detection element, remains substantially constant.
  • the current sensing element is preferred as the shunt alsobil ⁇ det and the resistance element of the Signal kausein ⁇ standardized in particular is not designed as a power resistor element.
  • the current detection element is preferably designed as a magnetic field sensor element and the resistance element of the signal processing unit is in particular not designed as a power resistance element .
  • a power resistor element is preferably an electronic component, for example a counter ⁇ stand element or a semiconductor device, such as a Tran understood ⁇ sistor, which is designed for current intensities of more than 1A, especially more than 10A.
  • the resistance element of the signal preparation unit is adapted accordingly expediently so that it comprises only components, which for electric currents up.
  • 1A, especially 10 A are laid out ⁇ , this relates especially preferred partial reflection ⁇ stand elements
  • the voltage for detecting the current through the resistance element is detected as a gate-source voltage or base-emitter voltage on a transistor element of the resistance element.
  • the resistance value of this counter- ⁇ stand element is mainly dependent on 1 by the value of the current through this resistor element or essen- is substantially dependent on 1 by the root of the value of the current through this resistance element.
  • the current sensor is preferably formed so that the peak value of the load current through the conductor by at least a factor of 100, in particular at least a factor of 1000, is greater than the peak value of the current through the counter ⁇ stand element of the signal processing unit.
  • the Signalver ⁇ processing unit is thus suitably designed such that at least its resistance element radio ⁇ tioniert as transmitters and the dynamic range or the limits of the interval of the dynamic range of the measurement signal significantly verrin ⁇ Gert, for example by a factor of one thousandth
  • the invention preferably has the advantage that the self-heating by the resistance element is low and for the current sensor essentially the external temperature influences are decisive.
  • the resistive element of the Signalver ⁇ processing unit two or more parallel-connected partial ⁇ resistance elements comprises, formed in particular switched on and / or switched off, substantially expanding the measurement range. More preferably, the Wi ⁇ derstandselement comprises a first and a second control loop, with each of which the voltage across a resistor part ⁇ element to a defined reference voltage value
  • the partial resistance element of the first control loop can be traversed by the current to be measured with a first defined direction and the partial resistance element of the second control loop of the measured can be flown through the current with a second direction opposite to the first direction and the current to be measured depending on the detected current direction by means of the first control circuit or by means of the second control circuit and gemes ⁇ is sen.
  • the portion of the resistance elements of the first and second control loop as two mutually complementary formed field effect transistors are formed and / or that the partial resistance elements of the first and second control circuit are connected in parallel, while the drain or collector terminal of a part resisting ⁇ stand elements respectively connected to the source or
  • Emitter terminal of the other partial resistance element verbun ⁇ is, in particular mutually.
  • the at least one abutment part ⁇ stand element at least one SenseFET is associated, which is connected to an analog-to-digital converter, is determined by the SenseFETs the current through the resistance element.
  • the defined reference voltage is adjustable for measuring range extension.
  • the invention also relates to the use of the current sensor in motor vehicles, in particular for measuring a discharge and / or charging current of an electrical energy store in an electric or hybrid vehicle.
  • Fig. 1 shows an embodiment in which the Stromsen ⁇ sor for measuring a de-and / or charging current of an electrical energy storage in a
  • Electric or hybrid vehicle is used, and
  • an exemplary current sensor having a resistance element of a signal processing circuit, said resistor element has two part reflection ⁇ stand elements includes, over which the voltage, each with a control circuit to a defined reference voltage value is controlled.
  • Fig. 1 shows an embodiment of the current sensor, the ESS measuring the discharging and charging current i M of an electrical energy storage device or battery ⁇ rule 8 is used.
  • Current ⁇ detection element 1 for example, designed as a shunt, detects the load current through the electrical conductor through which battery 8 is connected and provides depending on the load current, an electrical measurement signal, the signal processing unit 2, 3 is supplied to the ⁇ play a non-linear transformer comprising at least one resistance element.
  • the adapted or by signal processing unit 2, 3 converted measurement signal is supplied by analog-to-digital converter 4, which performs the measurement.
  • FIG. 2 illustrates an exemplary current sensor comprising current sense element 1, by way of example is formed as a shunt through which the current to be detected measurement ⁇ llast flows and over which the voltage is taken out as electrical ⁇ ULTRASONIC measurement signal.
  • This voltage is applied to amplifier 5 of the signal processing unit 2.
  • Resist ⁇ it element 3 comprises a first and a second control loop, wherein the first control loop, the left Operawider ⁇ stand element 6, the left amplifier and the associated reference voltage value specification ref of a reference ⁇ voltage source comprises, and the second control loop the right ⁇ te partial resistance element , the right amplifier 4 and the corresponding reference voltage value preset + Ref.
  • the two partial resistance elements 6, 7 of the two control ⁇ circuits are traversed by the current to be measured, wherein the partial resistance element of the first control loop is discharged during discharge of current i Kess and the partial resistance element of the second control circuit during charging, so if measurement current i measurement the opposite flow direction having.
  • the partial resistance elements 6, 7 of the first and second re ⁇ gel Vietnamesees are, for example according to a two mutually komplemen ⁇ Secretary formed MOS field-effect transistors formed and connected in parallel, the drain terminal of the one partial resistor element mutually connected respectively to the source terminal of the other part of the resistive element.
  • the drain-source voltage of the two MOSFETs is adjusted to a defined reference voltage value, whereby the resistance value of the two partial resistance elements is substantially dependent on 1 by the value of the current i M ess is pronounced by the resistance element 3 and thus with increasing measuring current i Kess the resistance decreases and increases with decreasing current, the resistance of the lovedsele ⁇ element 3.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

L'invention concerne un capteur de courant comportant au moins un premier élément détecteur de courant (1) qui détecte un courant de charge (i Last ) passant par un conducteur électrique et produit un signal de mesure électrique en fonction de ce courant de charge, l'élément détecteur de courant (1) étant relié à une unité de traitement de signal (2) qui comporte un élément de résistance (3) qui est conçu de telle manière qu'au moins dans une plage de mesure définie du capteur de courant, la résistance électrique de l'élément de résistance (3) diminue quand le courant de charge détecté par l'élément de détection de courant augmente.
EP12714274.3A 2011-03-29 2012-03-29 Capteur de courant Withdrawn EP2691782A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011006376 2011-03-29
PCT/EP2012/055718 WO2012130995A1 (fr) 2011-03-29 2012-03-29 Capteur de courant

Publications (1)

Publication Number Publication Date
EP2691782A1 true EP2691782A1 (fr) 2014-02-05

Family

ID=45954640

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12714274.3A Withdrawn EP2691782A1 (fr) 2011-03-29 2012-03-29 Capteur de courant

Country Status (7)

Country Link
US (1) US20140015533A1 (fr)
EP (1) EP2691782A1 (fr)
JP (1) JP2014509747A (fr)
KR (1) KR20140020304A (fr)
CN (1) CN103477234A (fr)
DE (1) DE102012205161A1 (fr)
WO (1) WO2012130995A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102013002447A1 (de) * 2013-02-12 2014-08-14 Audi Ag Antriebseinrichtung mit Gleichstrommotor
CN104656048B (zh) * 2014-09-26 2018-08-10 天津电气科学研究院有限公司 一种开关动作特性试验台的校准方法
CN104237623B (zh) * 2014-10-08 2017-04-12 武汉弈飞科技有限公司 一种高精度电流传感器检测电路及其检测方法
US9684018B2 (en) * 2014-11-19 2017-06-20 Texas Instruments Incorporated Current sense circuit that operates over a wide range of currents
WO2017069956A2 (fr) * 2015-10-22 2017-04-27 Memsic, Inc. Système adaptable de capteurs de courant moyen
CN105301333B (zh) * 2015-12-08 2018-08-10 恒宝股份有限公司 一种可提高测量电流动态范围的电源电路
CN105606325B (zh) * 2016-03-18 2018-01-02 天津力神电池股份有限公司 一种圆柱型锂离子电池振动和内阻测试设备
CN106443150A (zh) * 2016-06-20 2017-02-22 深圳市沃特玛电池有限公司 一种基于分流器的电流传感器
CN108205077A (zh) * 2016-12-16 2018-06-26 联合汽车电子有限公司 电流检测装置、电流检测系统及电流检测方法
DE102017219016A1 (de) * 2017-10-24 2019-04-25 Continental Automotive Gmbh Verfahren zum Betrieb eines Batteriesensors und Batteriesensor
CN115023618A (zh) * 2019-12-20 2022-09-06 株式会社杰士汤浅国际 电流测量装置、蓄电装置

Citations (1)

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WO2012001157A1 (fr) * 2010-07-01 2012-01-05 Continental Teves Ag & Co. Ohg Détecteur de courant

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DE59201675D1 (de) * 1992-08-07 1995-04-20 Siemens Ag Schaltungsanordnung zum Steuern einer Last und zum Erkennen einer Leitungsunterbrechung.
US5565714A (en) * 1995-06-06 1996-10-15 Cunningham; John C. Power conservation circuit
JP3429917B2 (ja) * 1995-09-14 2003-07-28 富士通株式会社 電源監視回路
US5585746A (en) * 1995-09-28 1996-12-17 Honeywell Inc. Current sensing circuit
TW498166B (en) * 1999-09-10 2002-08-11 Tdk Corp Magnetic sensor apparatus and current sensor
JP2001356139A (ja) * 2000-06-15 2001-12-26 Keiichiro Nobu 電流検出回路
JP2002267694A (ja) * 2001-03-14 2002-09-18 Yazaki Corp センサ装置
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DE10128136A1 (de) * 2001-06-09 2002-12-12 Bayerische Motoren Werke Ag Sicherheitsschalter zum Verhindern einer unbeabsichtigten Fahrzeugbatterie-Entladung
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TIETZE U ET AL: "Halbleiter-Schaltungstechnik, 13.3.3, TRANSISTOR-PRAEZISONSSTROMQUELLEN", HALBLEITER-SCHALTUNGSTECHNIK, XX, XX, 1 January 1993 (1993-01-01), pages 370 - 378, XP002408546 *

Also Published As

Publication number Publication date
KR20140020304A (ko) 2014-02-18
JP2014509747A (ja) 2014-04-21
US20140015533A1 (en) 2014-01-16
WO2012130995A1 (fr) 2012-10-04
DE102012205161A1 (de) 2012-10-04
CN103477234A (zh) 2013-12-25

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