CN102236084A - Calibration method and calibration circuit of current measuring system used for measuring storage battery current in motor vehicle - Google Patents
Calibration method and calibration circuit of current measuring system used for measuring storage battery current in motor vehicle Download PDFInfo
- Publication number
- CN102236084A CN102236084A CN2011101008420A CN201110100842A CN102236084A CN 102236084 A CN102236084 A CN 102236084A CN 2011101008420 A CN2011101008420 A CN 2011101008420A CN 201110100842 A CN201110100842 A CN 201110100842A CN 102236084 A CN102236084 A CN 102236084A
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- current
- calibration
- resistance
- measuring
- motor vehicle
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005259 measurement Methods 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 claims description 3
- 239000012141 concentrate Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012857 repacking Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Classifications
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- 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
- 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
- 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]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
Abstract
The invention relates to a calibration method of a current measuring system (200) used for measuring storage battery current (IB) in a motor vehicle. The calibration current (IK) is guided to pass through calibration resistance (110) and the current measuring system (200). The current measured by the current measuring system (200) is compared with the calibration current (IK), and the calibration of the current measuring system (200) is conducted based on the comparison.
Description
Technical field
The present invention relates to a kind of calibration steps and calibration circuit that is used for measuring the current measurement system of battery current at motor vehicle.
Background technology
For the state of accumulator in the cognitron motor-car, usually detected temperatures, electric current and/or voltage and handle by means of suitable algorithm.At this, be typically and adopt microcontroller or corresponding calculated unit.In order to detect electric current, use bypass resistance usually.
In EP 0 990 167 B1 in order to measure the measuring battery binding post that electric current discloses a kind of corresponding formation, its within it portion have measuring resistance (bypass) and measurement and signal processing unit, described measurement and signal processing unit by data conductor for example the LIN bus be connected with the control device of motor vehicle.This " intelligence " battery terminal structure is big, bothersome and expensive.
As a kind of improvement project, advised in DE 10 2,008 041 539 A1: battery terminal only is equipped with measuring resistance and analysis circuit connects by the corresponding lead that connects separatedly.In described analysis circuit, determine through the electric current of measuring resistance and with determined current value by the motor vehicle bus for example the LIN bus transfer give device for controlling motor vehicle.
The common ground of all solutions is in these prior aries, thereby measuring resistance invests in the main current loop of accumulator enduringly and must be designed to stable for a long time especially.Usually the measuring system of being made up of resistance and measuring amplifier once, promptly be calibrated and should provide acceptable measured value at whole life period then at band edge (Bandende).Desired tolerance limit does not allow to be exceeded in the process of life cycle.But this temperature stabilization is very expensive on the one hand with long-time stable resistance and measuring amplifier, still can change as time goes by on the other hand, thereby make the measurement result out of true.
Therefore be worth a kind of possibility that can calibrate again the measuring system that is in the application of providing of expectation, so that can determine the relation of electric current that actual flow is crossed and the electric current that measures.
Summary of the invention
The calibration steps and the calibration system that are used for measuring the current measurement system of battery current of independent claims feature have been advised having at motor vehicle according to the present invention.Favourable configuration is the theme of dependent claims and following explanation.
The present invention is basically based on following understanding, if promptly with the current known guiding by main measuring resistance and with the current ratio that measures, can calibrate again simply the current measurement system in the motor vehicle.This scheme provides following possibility, promptly adopts measuring resistance (bypass) and the measuring amplifier with lower temperature stability or long-time stability in primary current path.Also can not carry out the band edge calibration by the described possibility of calibrating again.
Can relatively easily produce a current known in motor vehicle, its mode is customer for example rear window heating arrangement, the headlight etc. that connect certain power.Calibration current should meet purpose require ground for 7-10A at least to realize enough measuring accuracy.Give in the calibration branch road of described customer in configuration one second measuring resistance is set, be so-called calibrated resistance, its resistance value is known and can relatively accurately determine calibration current based on this resistance value by the voltage that lands.When main measuring resistance is connected on the accumulator pole, the described calibration current described main measuring resistance of must also flowing through.Thus should be in the transition in the electric current change curve that occurs on the main measuring resistance corresponding to described calibration current.Can implement simply to calibrate again in this way.
Described calibrated resistance be not be in the main current loop and therefore on the one hand relatively protectorate be arranged in the motor vehicle, for example be arranged on control device inside and also needn't design on the other hand at high power.In addition, so described calibrated resistance only seldom and is only born load in short-term.This calibrated resistance suffers outside and internal influence seldom, thereby the comparable generally comparable main measuring resistance of this calibrated resistance provides more cheaply and also stable in addition.Described main measuring resistance and measuring amplifier less must constitute again long-term and stably, because can calibrate again.Also can adopt more cheap main measuring resistance and measuring amplifier thus.On purpose connect short (in wide boundary arbitrarily) load current and detect the calibration by demand control that can realize measuring system.
Preferred embodiment main measuring resistance is configured to earthing cable or concentrates on resistance in the conductor according to one, as it described in DE 10 2,006 029 547 A1.In order to make power loss the least possible, present main measuring resistance designs very for a short time (in the scope of 100 μ Ω), thereby thereby only also lands little measuring voltage and particularly proposing very high requirement aspect the drift for measuring amplifier.The higher by comparison resistance of earthing cable causes the proportional measuring voltage that increases, and this has reduced the requirement for measuring system, particularly measuring amplifier.Can adopt more cheap measuring amplifier, because can implement the calibration of described measuring system when needed with higher temperature drift.Because earthing cable demonstrates littler spontaneous heating than bypass when bearing load, so also reduced thermoelectric voltage.Based on described higher resistance usually, it also demonstrates better signal/thermoelectric voltage ratio.
By also using the power functions be included in master controller or the control device (for example being used for the switch, back headlight of rear window heating arrangement etc.) can be very little with implementing to expend maintenance.Can utilize existing element, required repacking is very little.When preferably utilizing earthing cable as main measuring resistance, the lead-in wire of near measurement mechanism is pressed in the terminal of described earthing cable just enough basically.Can save independent bypass.
Improved safety in operation in addition.Therefore very little and described measuring system also demonstrates the littler susceptibility at sealing problem (structure and interconnection technique) for the requirement of described measuring system, described sealing problem particularly in NFz because the mechanical load that increases and can occurring consumingly.
Additional advantage of the present invention and configuration draw from instructions and accompanying drawing.
Obviously aforesaid and back also not only can be with the combination of respective description and can be with other combinations or use separately with the feature set forth, and does not depart from the scope of the present invention.
The present invention schematically shows in the accompanying drawings and is described in detail with reference to the accompanying drawings by means of embodiment.
Description of drawings
Fig. 1 schematically and with circuit diagram illustrates a details that comprises according to the motor vehicle current return of the preferred implementation of calibration circuit of the present invention.
Embodiment
Among Fig. 1 schematically and the details of motor vehicle electrical network is shown with circuit diagram.In this motor vehicle electrical network, be provided for measuring battery current I
B Measuring system 200, described measuring system is arranged between the anodal 301' and ground in the motor vehicle electrical network in this example.Described measuring system 200 comprises that a main measuring resistance 210 with resistance value R and one are used to be amplified on the described resistance 210 because described battery current I
BAnd the landing voltage and be used to export measuring voltage U
SMeasuring amplifier 220.Described measuring voltage U
SWith battery current I
BBe in the relation by described measuring system 200 definition, wherein, described in the prior art measuring system 200 or its parts are constructed like this or are selected, and obtain temperature stabilization and long-time stable relations.Promptly mostly just implement calibration at band edge once in the prior art and (determine U
SWith I
BBetween relation), wherein, this calibration is tackled in the whole life-span and is suitable for.For this reason, the parts that adopt in the prior art of described measuring system 200 are relatively expensive.
But according to illustrated embodiment of the present invention, the calibration again of described measuring system 200 can---particularly trigger ground termly or for example---constantly arbitrarily and implement by temperature fluctuation.For this purpose, calibration circuit 100 is set also in the motor vehicle electrical network.Described calibration circuit is connected customer 302 for example after the rear window heating arrangement in this example.Described customer 302 usually with so-called binding post 15(portfire) be connected, described binding post is represented with 301.Be used to the switch 303 that this customer is turned on and off in addition described customer configuration.
Described calibration circuit comprises that in this example has a resistance value R
KCalibrated resistance 110 be configured to the on-off element that described calibration circuit is connected with described customer 302 of being used to of transistor switch 120 with one at this.Described calibration circuit can have unshowned measuring amplifier equally here.But because described calibrated resistance 110 can selectedly get obviously greater than described main metering circuit 210, so the setting of measuring amplifier is not under any circumstance all to meet the purpose requirement.
When master cock element 120,, thereby make calibration current I through the current return closure of calibration circuit 100
KCalibrated resistance 110, landing calibration voltage U on this calibrated resistance thus flow through
KDescribed customer 302 is selected like this, makes to flow through the interior calibration current I of sufficiently high for example 10A scope
KThereby, can determine battery current I
BEnough big change.
Because described measuring system 200 is in the main current loop of motor vehicle, is connected on the anodal 301' in this example, so calibration current I
KThe described measuring system 200 of during described calibration process, also flowing through and cause battery current I
BCorresponding raising.Described battery current I
BDescribed raising as measuring voltage U
SRaising by 200 expressions of described measuring system.Can determine the described electric current that additionally flows through, be calibration current I by the raising of described measuring voltage
KCan implement the recalibration of described measuring system 200 by the comparison of the value that shows by described measuring system 200 and actual value.
Described calibration current I
KActual value by on described calibrated resistance 110 landing calibration voltage U
KDetermine.Described calibrated resistance 110 is selected as particularly temperature stabilization and long-time stable.Thereby but only seldom and also only bear load in short-term, promptly only during calibration process, bear load, so described calibrated resistance 110 suffers less inside and outside influence than main measuring resistance because of described calibrated resistance 110.Therefore suitable calibrated resistance (this calibrated resistance can be arranged on the shielded position in addition, for example be arranged on control device inside) provide simpler and more cheap.
According to a preferred configuration, main measuring resistance 210 is configured to earthing cable.Can save the bypass resistance of oneself.Described earthing cable makes the negative pole of described accumulator be connected with the earth point of vehicle body (Fz-chassis).If described accumulator---as in most of the cases common---is in the nacelle, and it is long and have enough resistance that then described earthing cable is about 50cm to 80cm.
Claims (10)
1. calibration steps that is used for current measurement system (200), described current measurement system is used for measuring battery current (I at motor vehicle
B), wherein, with calibration current (I
K) guiding is by calibrated resistance (110) and described current measurement system (200), wherein, the electric current and the described calibration current (I that will measure by described current measurement system (200)
K) relatively and based on the described calibration of relatively implementing described current measurement system (200).
2. according to the process of claim 1 wherein, described current measurement system (200) has main measuring resistance (210), with described battery current (I
B) guide by described main measuring resistance, wherein, by means of the voltage (U that goes up landing at described main measuring resistance (210)
S) definite electric current of measuring by described current measurement system.
3. according to the method for claim 2, wherein, described main measuring resistance (210) is configured to earthing cable or is configured to be concentrated in resistance in the cable.
4. according to each method in the above claim, wherein, described calibration current (I
K) by means of the resistance value (R of described calibrated resistance (110)
K) and go up the calibration voltage (U of landing in described calibrated resistance (110)
K) determine.
5. according to each method in the above claim, wherein, described calibrated resistance (110) is arranged in the customer branch road (302) of described motor vehicle current return.
6. according to the method for claim 5, wherein, described customer (302) is selected as making and flows through at least 7,8,9 or calibration current (the I of 10A
K).
One kind be used for the calibration be used for measuring battery current (I at motor vehicle
B) the calibration circuit (100) of current measurement system (200), comprising: calibrated resistance (110), calibration current (I
K) can be conducted through described calibrated resistance, and described calibrated resistance and described current measurement system (200) are connected in series; Switching device (120), so that described calibrated resistance (110) is connected with the customer (302) of described motor vehicle, wherein, described calibration circuit (100) is set for measurement mechanism and is connected, and described measurement mechanism is used for measuring the calibration voltage (U that goes up landing in described calibrated resistance (110)
K).
8. according to the calibration circuit (100) of claim 7, comprise measuring system (200).
9. calibration circuit according to Claim 8 (100), wherein, described measuring system (200) has main measuring resistance (210).
10. according to the calibration circuit of claim 9, described main measuring resistance (210) is configured to earthing cable or is configured to concentrate on resistance in the cable.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010028066.6 | 2010-04-22 | ||
| DE102010028066A DE102010028066A1 (en) | 2010-04-22 | 2010-04-22 | Calibration method for current measurement system for measuring battery current in motor vehicle, involves conducting calibration current through calibration resistor and current measurement system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102236084A true CN102236084A (en) | 2011-11-09 |
Family
ID=44751523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101008420A Pending CN102236084A (en) | 2010-04-22 | 2011-04-21 | Calibration method and calibration circuit of current measuring system used for measuring storage battery current in motor vehicle |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN102236084A (en) |
| DE (1) | DE102010028066A1 (en) |
| HU (1) | HUP1100211A2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103158576A (en) * | 2011-12-16 | 2013-06-19 | 李尔公司 | Battery current measuring and calibrating method and system |
| CN103364611A (en) * | 2012-04-03 | 2013-10-23 | 罗伯特·博世有限公司 | A device and a method for the redundant determination of a battery current flowing through the poles of a battery |
| CN104871027A (en) * | 2012-12-20 | 2015-08-26 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Method for calibrating a current sensor |
| CN106291424A (en) * | 2015-06-29 | 2017-01-04 | 大陆汽车有限公司 | For the method measuring measured current actual value and the deviation of current rating |
| CN107003338A (en) * | 2014-09-17 | 2017-08-01 | 大陆-特韦斯股份有限公司 | By referring to correcting current current sensor during current measurement |
| CN108693461A (en) * | 2017-04-04 | 2018-10-23 | 半导体元件工业有限责任公司 | Calibrate circuit and the method for calibrating protection IC |
| CN109073683A (en) * | 2016-04-25 | 2018-12-21 | 大陆汽车有限公司 | For determining the method and battery sensor of load current |
| CN109416391A (en) * | 2016-07-12 | 2019-03-01 | 宝马股份公司 | For determining method, battery module and the device of the internal resistance of battery cell |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011088590A1 (en) * | 2011-12-14 | 2013-06-20 | Robert Bosch Gmbh | Method for checking an electric current measurement, circuit for carrying out the method, battery and motor vehicle |
| WO2016042109A1 (en) * | 2014-09-17 | 2016-03-24 | Continental Teves Ag & Co. Ohg | Method for the continuous calibration of current measuring systems in motor vehicles |
| WO2016041658A1 (en) * | 2014-09-17 | 2016-03-24 | Continental Teves Ag & Co. Ohg | Calibration of current sensors by means of reference current |
| DE102016202498A1 (en) * | 2016-02-18 | 2017-08-24 | Continental Automotive Gmbh | Measuring resistance calibration device, method for calibrating a measuring resistor and battery sensor |
| CN106872761A (en) * | 2017-03-28 | 2017-06-20 | 上海与德科技有限公司 | The measuring circuit of quantity measuring method and its calibration factor, method, terminal device |
| WO2020043780A1 (en) * | 2018-08-30 | 2020-03-05 | Continental Automotive Gmbh | Battery sensor and method for operation of a battery sensor |
| DE102020207246A1 (en) | 2020-06-10 | 2021-12-16 | Volkswagen Aktiengesellschaft | Method for calibrating measuring elements for current measurement |
| CN113252949B (en) * | 2021-05-13 | 2021-11-05 | 北京芯格诺微电子有限公司 | High-precision current sampling circuit with on-chip real-time calibration |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE59913509D1 (en) | 1998-04-17 | 2006-07-20 | Systemtechnik Ag Ak | BATTERY MEASURING TERMINAL |
| DE102006029547A1 (en) | 2006-06-26 | 2007-12-27 | Robert Bosch Gmbh | Battery sensor unit and method for manufacturing the battery sensor unit |
| DE102008041539A1 (en) | 2008-08-26 | 2010-03-04 | Robert Bosch Gmbh | Shunt resistor with evaluation circuit |
-
2010
- 2010-04-22 DE DE102010028066A patent/DE102010028066A1/en not_active Withdrawn
-
2011
- 2011-04-21 HU HU1100211A patent/HUP1100211A2/en unknown
- 2011-04-21 CN CN2011101008420A patent/CN102236084A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103158576A (en) * | 2011-12-16 | 2013-06-19 | 李尔公司 | Battery current measuring and calibrating method and system |
| CN103158576B (en) * | 2011-12-16 | 2015-10-28 | 李尔公司 | The method and system of battery current Measurement and calibration |
| US9234943B2 (en) | 2011-12-16 | 2016-01-12 | Lear Corporation | Method and system for battery current measurement calibration |
| CN103364611A (en) * | 2012-04-03 | 2013-10-23 | 罗伯特·博世有限公司 | A device and a method for the redundant determination of a battery current flowing through the poles of a battery |
| CN104871027A (en) * | 2012-12-20 | 2015-08-26 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Method for calibrating a current sensor |
| CN107003338A (en) * | 2014-09-17 | 2017-08-01 | 大陆-特韦斯股份有限公司 | By referring to correcting current current sensor during current measurement |
| CN107003338B (en) * | 2014-09-17 | 2020-01-17 | 大陆-特韦斯股份有限公司 | Calibrating a current sensor during current measurement by means of a reference current |
| CN106291424A (en) * | 2015-06-29 | 2017-01-04 | 大陆汽车有限公司 | For the method measuring measured current actual value and the deviation of current rating |
| CN106291424B (en) * | 2015-06-29 | 2019-06-18 | 大陆汽车有限公司 | Method for measuring the deviation of measured current actual value and current rating |
| US11009533B2 (en) | 2015-06-29 | 2021-05-18 | Vitesco Techologies GmbH | Method for determining deviations between actual measured current values and setpoint current values in a plurality of parallel-connected current-regulated circuit paths |
| CN109073683A (en) * | 2016-04-25 | 2018-12-21 | 大陆汽车有限公司 | For determining the method and battery sensor of load current |
| CN109416391A (en) * | 2016-07-12 | 2019-03-01 | 宝马股份公司 | For determining method, battery module and the device of the internal resistance of battery cell |
| CN108693461A (en) * | 2017-04-04 | 2018-10-23 | 半导体元件工业有限责任公司 | Calibrate circuit and the method for calibrating protection IC |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102010028066A1 (en) | 2011-10-27 |
| HUP1100211A2 (en) | 2012-08-28 |
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Application publication date: 20111109 |