CN102243291A - Method for measuring accumulator power in motor car - Google Patents
Method for measuring accumulator power in motor car Download PDFInfo
- Publication number
- CN102243291A CN102243291A CN2011101008416A CN201110100841A CN102243291A CN 102243291 A CN102243291 A CN 102243291A CN 2011101008416 A CN2011101008416 A CN 2011101008416A CN 201110100841 A CN201110100841 A CN 201110100841A CN 102243291 A CN102243291 A CN 102243291A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000005259 measurement Methods 0.000 claims description 11
- 238000004458 analytical method Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 238000011156 evaluation Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004020 conductor Substances 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
- 230000006698 induction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention relates to a method for measuring accumulator power (IB) in motor car. The accumulator power (IB) runs through a measuring resistor (110) and a measuring voltage (Us) dropped at the measuring resistor. The method involves using several amplifiers (180,300,400) provided with respective input ports (A, B) for receiving voltage and an output (C) for outputting the voltage. The outputs are connected to an evaluation circuit (210). The accumulator power is measured by applying the measuring voltage (Us) dropped at the measuring resistor to the input ports (A, B) which are short circuited for zero point adjustment.
Description
Technical field
The present invention relates to a kind of method and a kind of metering circuit that is used for measuring 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, advise in DE 10 2,008 041 539 A1: battery terminal only is equipped with measuring resistance and analysis circuit (Auswerteschaltung) connects by the corresponding lead that connects separatedly.In described analysis circuit, determine to flow through measuring resistance electric current and with determined current value by vehicle bus for example the LIN bus pass to controller of vehicle.The shortcoming of this prior art is always to need the analysis circuit that takes a lot of trouble.
What therefore be worth expectation is that the battery current of simplifying in the motor vehicle is measured, and wherein, particularly should reduce member and expend.
Summary of the invention
The measuring method and the metering circuit of independent claims feature have been advised having according to the present invention.Favourable configuration is the theme of dependent claims and following explanation.
The present invention is basically based on following knowledge, and the battery current that promptly can simplify in the motor vehicle is measured, if use the member that has existed anyway for this reason.Particularly, traditional device for controlling motor vehicle for example has energy management control device, analog to digital conversion circuit, and they are suitable for measuring battery current in principle.Can save independent measurement battery current thus and battery current is converted to the analysis circuit of digital signal.
But the processing of the measuring voltage of landing in measuring resistance or bypass proposes high request for measuring amplifier.Common measuring amplifier for example has skew-drift, and described skew-drift makes this measuring amplifier or induction by current amplifier (CSA) not allow easily to be used for battery current and measures.For this reason, adopt bothersome analysis circuit in the prior art.But the inventor recognizes, just can overcome and described skew-related problem of drift if implement to adjust regular zero point (Nullpunktsabgleich).So can measure the voltage by measuring amplifier output in the analog to digital converter that has existed in control device anyway, described analog to digital converter also has required for this reason the eigenwert for example resolution and the linearity now.Adjust described zero point and can termly and/or trigger ground (for example depend on temperature, depend on temperature fluctuation etc.) enforcement.
Therefore the present invention can reduce expending that battery current measures greatly, this particularly under the situation of the battery system of parallel connection (as its for example at the commerial vehicle of a lot of countries frequent) bring into play special advantage.Here must measure a plurality of battery currents, thereby make that saving is big especially generally.Can save an analytic unit for each battery current measurement point.Particularly the output terminal of a plurality of measuring amplifiers can be connected with same analog to digital converter, thereby also realizes saving aspect analog to digital conversion.
Because in the present invention---with disclosed battery current measuring system in the prior art differently---measuring resistance with treating apparatus, be that measuring amplifier and analog to digital converter separate, so each single element can be changed independently, this has further reduced cost.Should carry out the calibration of measuring system after replacing, this for example can be by using manufacturer's calibration data, for example simplifying with data matrix code.When changing, only also need read in this manufacturer calibration data.
If adopt the resistance relevant, NTC or PTC alternatively or additionally, then also can measure at the enterprising trip temperature of electrode current binding post in an identical manner with temperature for current measurement resistance.
Significant cost savings have been realized by also using circuit, the particularly ADC and the voltage supply device that are included in master controller or the control device.Because in control device, carry out main analytic process, so the requirement at aspects such as stability, sealings also reduces for metering circuit.
Described skew-drift is basically owing to the aging and temperature of the parts that participate in causes.In preferred embodiment, additionally measure on the described accumulator, on the described measuring resistance and/or the temperature on the described measuring amplifier.For example high-precision measuring resistance also shows the performance relevant with temperature, and described performance causes the distortion of measurement result.If additionally detected temperatures then can adopt the actual resistance of measuring resistance in the temperature that occupies advantage just now.Temperature dependency for measuring amplifier also is like this.In order to compensate, can calibration factors be taken into account generally based on determined temperature.The calibration factor that is used for the temperature intermediate value is for example by the interpolation method support.If have the matrix of supporting by multiple calibration, then can reduce the frequent degree of calibration, because only also need consider aging effect.
Metering circuit of the present invention is set for the method for the present invention of implementing.
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 correspondingly explanation 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 is illustrated in the accompanying drawings and is described in detail with reference to the accompanying drawings by means of embodiment.
Description of drawings
Fig. 1 illustrates a preferred implementation of metering circuit of the present invention with the form of circuit diagram.
Embodiment
A preferred implementation of metering circuit of the present invention illustrates with the form of circuit diagram in Fig. 1 and represents with 100 generally.One has value R
SMeasuring resistance or bypass resistance 110 be connected on the accumulator pole 10.The battery current I of measuring resistance 110 flows through
BCause landing measuring voltage U on measuring resistance 110
SDescribed measuring voltage Us guides to two input terminal A, B of measuring amplifier 180 by lead 120, resistance 130 and 150 and first switchgear 160 of the twisting in order to suppress undesired signal.The output terminal C of described measuring amplifier 180 is connected with the main control unit 200 of the energy management system of described motor vehicle.Described main control unit 200 especially comprises analog to digital conversion circuit 210 and microcontroller 220.Described control device 200 also has other unshowned parts here.
Described metering circuit has resistance 140 in addition, and this resistance is connected with the input terminal A of described measuring amplifier 180 by second switch device 170.Between first switchgear 160 and second switch device 170, paraphase element 190 is set, thereby makes two switchgears make that always one of described switchgear is opened and another switchgear closure by control device 200 by means of unique signal Be Controlled.
In the example shown here, metering circuit 100 has temperature sensor 195 in addition, and described temperature sensor 195 is provided with like this, makes it can detect the temperature of accumulator and measuring resistance 110.Described temperature can particularly be used for the measurement that the resistance value relevant with temperature with measuring resistance 110 is used to describe below.
In order to measure battery current I
B, these switchgear Be Controlled are opened win switchgear 160 closures and second switch device 170.So measuring voltage U of landing on measuring resistance 110
SImpose on the input terminal A and the B of measuring amplifier 180 by resistance 130 and 150 with value R or R'.The voltage that is applied can meet the destination and be exaggerated in measuring amplifier 180, thereby puts on the measurement range that output voltage on the output terminal C covers analog to digital conversion circuit 210 as far as possible well.
In order on than the long time period, also to guarantee measuring accuracy, implement the adjustment at zero point termly and/or with triggering.For example can implement in any engine type that described zero point is adjusted and/or the certain temperature fluctuation of record by means of described temperature sensor 195 time.Adjust in order to implement described zero point, switchgear 160 and 200 controls of 170 controlled devices are opened and second switch device 170 closures the switchgear 160 of winning.Cause the input terminal A and the B of measuring amplifier 180 to pass through resistance 140 and 150 short circuits thus.It is desirable to, described resistance 130,140 is the same with 150 sizes, that is to say R=R
0=R' is so that avoid because that the different input currents of measuring amplifier cause is asymmetric.Between the adjustment period of described zero point at the voltage of output terminal C place output as current offset voltage by described main control unit 200 records with store.Then described offset voltage is deducted from corresponding measurement result at the measurement run duration, so that implement offset correction.
Metering circuit of the present invention uses and allows thus the saving of additional member, for example analysis circuit or voltage supply device in conjunction with the parts that exist anyway of control device 200.In addition as shown in Figure 1, the analysis circuit 210 in the control device 200 can be used to detect a plurality of electric currents, as schematically showing by other measuring amplifier 300 and 400.
Claims (10)
1. one kind is used for measuring battery current (I at motor vehicle
B) method, wherein, described battery current (I
B) measuring resistance (110) and the measuring voltage (U that lands on described measuring resistance (110) flow through
S), wherein, use has two input terminal (A that are used to receive voltage, B) and a measuring amplifier (180,300,400) that is used for the output terminal (C) of output voltage, wherein, described output terminal (C) is connected with an analysis circuit (210), wherein, and in order to measure described battery current (I
B) will go up the measuring voltage (U of landing at described measuring resistance (110)
S) be applied to described two input terminals (A, B), wherein, in order to adjust at zero point of described measurement, with described two input terminals (A, B) short circuits.
2. according to the process of claim 1 wherein, use analog to digital conversion circuit (210) in the main control unit (200) of the energy management system of described motor vehicle as analysis circuit.
3. according to the method for claim 2, wherein, described main control unit (200) impels adjust described zero point with triggering termly and/or.
4. according to each method in the above claim, wherein, in order to adjust described zero point, will described two input terminals (A B) passes through at least one resistance (140,150) short circuit.
5. according to each method in the above claim, wherein, additionally measure the temperature of the temperature of described accumulator, described measuring resistance (110) and/or the temperature of described measuring amplifier (180).
6. according to the method for claim 5, wherein, be identified for the calibration factor of the voltage amplification of the resistance value of described measuring resistance (110) and/or described measuring amplifier according to the temperature that measures.
7. according to each method in the above claim, wherein, measure the positive pole (10) of described accumulator and the battery current on the negative pole, and use same analysis circuit (210) to measure.
8. one kind is used for measuring battery current (I at motor vehicle
B) metering circuit (100), comprising: be used to be connected on the measuring resistance (110) on the vehicle battery; With two input terminals that are used to receive voltage (A, B) and a measuring amplifier (180,300,400) that is used for the output terminal (C) of output voltage; Be used to make described two input terminals (A, B) first switchgear (160) that is connected with described measuring resistance (110) and be used to make described two input terminals (A, B) the second switch device (170) of short circuit.
9. metering circuit according to Claim 8 (100), the analog to digital conversion circuit (210) in the main control unit (200) of the output terminal of this metering circuit and the energy management system of described motor vehicle is connected.
10. according to the metering circuit (100) of claim 9, wherein, described main control unit (200) is configured to control described first switchgear (160) and second switch device (170) and is used for implementing according to each method of claim 1 to 6.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010028088A DE102010028088A1 (en) | 2010-04-22 | 2010-04-22 | Method for measuring accumulator power in motor car, involves connecting input ports of amplifiers to two resistors for receiving measurement voltage dropped at measurement resistor, and outputs of amplifiers to single evaluation circuit |
| DE102010028088.7 | 2010-04-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102243291A true CN102243291A (en) | 2011-11-16 |
| CN102243291B CN102243291B (en) | 2016-01-20 |
Family
ID=44751531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110100841.6A Expired - Fee Related CN102243291B (en) | 2010-04-22 | 2011-04-21 | For measuring the method for battery current in a motor vehicle |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN102243291B (en) |
| DE (1) | DE102010028088A1 (en) |
| HU (1) | HUP1100213A2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103809028A (en) * | 2012-11-14 | 2014-05-21 | 罗伯特·博世有限公司 | Measuring circuit for determining resistance value of sensor resistor element |
| CN104459294A (en) * | 2013-09-23 | 2015-03-25 | 现代摩比斯株式会社 | Current measurement apparatus and the method of using temperature dependent resistance |
| CN106233147A (en) * | 2014-04-24 | 2016-12-14 | 大陆汽车有限公司 | The branch current with temperature-compensating is measured |
| CN106462128A (en) * | 2014-02-26 | 2017-02-22 | 西门子公司 | Input circuit that can be made redundant, input circuit unit having at least one input circuit, and method for operating such an input circuit unit |
| CN107843841A (en) * | 2016-09-20 | 2018-03-27 | 大众汽车股份公司 | Sensor arrangement and battery monitoring controller for monitoring the current in the current rail of an electrically drivable driving device |
| 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 |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2602798B1 (en) * | 2011-12-05 | 2020-01-22 | Isabellenhütte Heusler GmbH & Co.KG | current-measurement resistor |
| DE102012014436A1 (en) | 2012-07-13 | 2014-05-08 | Volkswagen Aktiengesellschaft | Method for detecting current flow through battery device of battery system in motor car, involves determining current flow through single cell depending on internal resistance, cell voltage and cell temperature by current detection function |
| US9671438B2 (en) * | 2014-11-05 | 2017-06-06 | Qualcomm Incorporated | High-current sensing scheme using drain-source voltage |
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2010
- 2010-04-22 DE DE102010028088A patent/DE102010028088A1/en not_active Ceased
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2011
- 2011-04-21 CN CN201110100841.6A patent/CN102243291B/en not_active Expired - Fee Related
- 2011-04-21 HU HU1100213A patent/HUP1100213A2/en active IP Right Revival
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103809028A (en) * | 2012-11-14 | 2014-05-21 | 罗伯特·博世有限公司 | Measuring circuit for determining resistance value of sensor resistor element |
| CN111025019A (en) * | 2012-11-14 | 2020-04-17 | 罗伯特·博世有限公司 | Measuring circuit for determining a resistance value of a sensor resistance device |
| CN104459294A (en) * | 2013-09-23 | 2015-03-25 | 现代摩比斯株式会社 | Current measurement apparatus and the method of using temperature dependent resistance |
| CN106462128A (en) * | 2014-02-26 | 2017-02-22 | 西门子公司 | Input circuit that can be made redundant, input circuit unit having at least one input circuit, and method for operating such an input circuit unit |
| US10740272B2 (en) | 2014-02-26 | 2020-08-11 | Siemens Aktiengesellschaft | Input circuit that can be made redundant, input circuit unit having at least one input circuit, and method for operating the input circuit unit |
| CN106233147A (en) * | 2014-04-24 | 2016-12-14 | 大陆汽车有限公司 | The branch current with temperature-compensating is measured |
| CN106233147B (en) * | 2014-04-24 | 2019-07-12 | 大陆汽车有限公司 | Branch current measurement with temperature-compensating |
| 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 |
| CN107843841A (en) * | 2016-09-20 | 2018-03-27 | 大众汽车股份公司 | Sensor arrangement and battery monitoring controller for monitoring the current in the current rail of an electrically drivable driving device |
Also Published As
| Publication number | Publication date |
|---|---|
| HUP1100213A2 (en) | 2012-09-28 |
| CN102243291B (en) | 2016-01-20 |
| DE102010028088A1 (en) | 2011-10-27 |
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