CN105372609A - Method for checking at least one measuring device for measuring a current flowing through a current path of electric current - Google Patents
Method for checking at least one measuring device for measuring a current flowing through a current path of electric current Download PDFInfo
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- CN105372609A CN105372609A CN201510506937.0A CN201510506937A CN105372609A CN 105372609 A CN105372609 A CN 105372609A CN 201510506937 A CN201510506937 A CN 201510506937A CN 105372609 A CN105372609 A CN 105372609A
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- 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
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- General Physics & Mathematics (AREA)
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- Measurement Of Current Or Voltage (AREA)
Abstract
The invention relates to a method for checking at least one measuring device (12, 14) for measuring electric current flowing through a current path (16), in particular battery current, wherein the at least one measuring device (12, 14) having a computing device (26) for control and/or regulation of the measurement. It is envisaged that a further processing device (30) communicates with the computing device (26) of the at least one measuring device (12, 14) in order to monitoring measurement of the at least one measuring device (12, 14) according to the control and/or regulation by means of inquiry and answering communication. The invention further relates to a corresponding system (10) with the at least one measuring device (12, 14) for measuring electric current I flowing through a current path (16).
Description
Technical field
The present invention relates to a kind of for checking that at least one is for measuring the method for the measurement mechanism of the electric current I, the particularly battery pack current that flow through current path, at least one measurement mechanism wherein said has the calculation element for controlling and/or regulate measurement.The present invention relates in addition and has at least one for measuring the corresponding system of the measurement mechanism of the electric current I, the particularly battery pack current that flow through current path, and at least one measurement mechanism wherein said has the calculation element for controlling and/or regulate measurement.
Background technology
Present, from now on not only in static application (such as in wind facilities), in vehicle (such as in hybrid power and electric vehicle) but also use new battery pack system increasedly in consumer field (such as notebook computer and mobile phone), about reliability, safety, efficiency and life-span, very high requirement is proposed to described new battery pack system.The electric battery of lithium-ion technology is particularly utilized to be suitable for such task.In addition, the feature of the electric battery of lithium-ion technology is utilized to be high energy density and extremely few self discharge.
But, produce high security requirement about utilizing the functional safety of such electric battery of lithium-ion technology.The unsuitable operation of battery cell can cause the reaction of heat release until to catch fire and/or degassed.In order to avoid described less desirable system response, need the safety inspection of battery pack current in addition.In current systems, this safety inspection of battery pack current realizes by the current sensor of different redundancy, namely uses two sensors, and described two sensors are by different measuring principles detection battery pack current.The possibility of the current detecting of different redundancy can detect battery pack current by its galvanomagnetic effect, another aspect by the voltage drop on current measurement resistance on the one hand.
Start the inspection method mentioned and the corresponding system for performing the method is such as known by open source literature DE102010041275A1.The document describe a kind of for internal check for measuring the method flowing through the measurement mechanism of the battery pack current I of current path of electric battery.Measurement mechanism at least has current sensor and is constructed to the calculation element for controlling and/or regulate measurement of microcontroller.During the pre-charging stage of electric battery, this pre-charging stage started in the following moment, to be connected in electric battery and electric assembly carries out precharge by pre-charge current during this pre-charging stage at least one electric assembly of this moment, calculation element by least one measured value provided by current sensor with compare from the determined prospective current value of the time curve of the expection of pre-charge current.
Summary of the invention
The safety of at least one measurement mechanism can be realized and the inspection of affordable according to method of the present invention with according to system of the present invention.
Be provided with in inspection method according to the present invention for monitor the measurement of at least one measurement mechanism by the calculation element of this measurement mechanism by the control of regulation and/or the other calculation element of adjustment, this other calculation element communicates by inquire response with this calculation element of at least one measurement mechanism described.The calculation element of at least one measurement mechanism is monitored by communicating with this inquire response of other calculation element.At this, with in E gas 3 layers of monitoring scheme (E-Gas3-Ebenen-Ueberwachungskonzept) similarly, the calculation element as supervisory control comuter generates inquiry and monitors the corresponding response of the calculation element of (at least one) measurement mechanism.
Do not limit in principle when selecting the sensor type of at least one " intelligence " measurement mechanism.But according to a kind of favourable design proposal of the present invention, measurement mechanism has the metering circuit device as current sensor, is connected with the shunt resistance that can be inserted in current path in this metering circuit device.In addition, measurement mechanism has at this analog to digital converter equipment be connected to medially on signalling technique between metering circuit device and calculation element.
The calculation element of other calculation element particularly measurement mechanism outside.So therefore the method is a kind of method at least one measurement mechanism of visual examination.If the electric current I measured is such as the battery pack current of electric battery, so calculation element is such as the batteries management system (BMS) of this electric battery or the ingredient of opertaing device (BCU).
Draw following advantage:
-there is the diagnosis possibility of the improvement of the measurement mechanism (Intelligent current sensor) of calculation element,
-safe current detecting (such as according to ASILC) can be realized when there is no different redundance units,
-can realize using only a kind of sensor type and the less integrated cost be therefore associated,
-altogether because mistake is diagnosed in redundant measurement system,
-cost savings, because the sensor (such as Hall element) that expensive different redundancies can be abandoned, and
-meet HW security measure and avoid the independent mistake of the unknown about current sensor hardware.
According to a kind of favourable improvement project of the present invention, be provided with at least two for measuring the measurement mechanism flowing through the electric current I of current path redundantly.The adjustment of measurement result can be carried out when two measurement mechanisms and therefore identify and eliminate possible measuring error.
Advantageously specify at this, inquire response communication is used to the adjustment of the measurement result of measurement mechanism in addition.
According to a kind of favourable embodiment regulation according to the present invention, other calculation element introduces wrong reaction when recognizing the control of measurement of at least one measurement mechanism and/or wrong in regulating.In addition react and particularly comprise:
-export corresponding error notification and/or
-reset corresponding measurement mechanism calculation element and/or
-handle the current source of generation current I, particularly produce the battery apparatus of battery pack current.
Substantially, calculation element can be constructed to each calculation element with processor and basic peripherals naturally.But the improvement project that another kind according to the present invention is favourable, at least one in calculation element is constructed to microcontroller (μ C).
System according to the present invention has other calculation element.This other calculation element, in order to monitor that the measurement of at least one measurement mechanism is connected with the calculation element of at least one measurement mechanism in the communication technology by the control of the calculation element of this measurement mechanism and/or adjustment, makes communication can implement as inquire response communication.System is particularly configured at this system performing said method.
According to a kind of favourable design proposal of the present invention, at least one in measurement mechanism or measurement mechanism has in addition:
-(as current sensor) metering circuit device, in this metering circuit device, be connected with the shunt resistance that can be inserted in current path, and
-on signalling technique, be connected to analog to digital converter equipment between metering circuit device and described calculation element medially.
The design proposal that another kind according to the present invention is favourable, metering circuit device has amplifier apparatus.This amplifier apparatus is preferably constructed to PGA(ProgrammableGainAmplifier(programmable gain amplifier)).
The improvement project that another kind according to the present invention is favourable, the communication path for inquire response communication is provided by field bus system.If system is used in vehicle, so field bus system is preferably automotive bus system, such as CAN(ControllerAreaNetwork(controller zone network)) bus or LIN(LocalInterconnectNetwork(Local Interconnect Network)) bus.
Accompanying drawing explanation
The present invention is explained in detail hereinafter by accompanying drawing.Wherein:
Accompanying drawing illustrate according to of the present invention a kind of preferred embodiment have two redundancies for correspondingly measure flow through the measurement mechanism of the electric current of current path and the system of central computing device.
Embodiment
Accompanying drawing illustrate have two redundancies for correspondingly measuring the system 10 of the measurement mechanism 12,14 of the electric current I of current path 16 of flowing through.This electric current I is such as can the battery pack current of electric battery (not shown) of recharge.At this, construct two measurement mechanisms 12,14 in the same manner.Each in measurement mechanism 12,14 is set up for measuring the electric current I that flows through current path 16 independently and this being had respectively to the sensor of metering circuit device 18 form, is furnished with and is inserted into/can be inserted into shunt resistance 20 in current path 16, be placed on the input circuit 22 of shunt resistance 20 and be placed on the amplifier apparatus 24 of this input circuit 22 in this metering circuit device.Each in two measurement mechanisms 12,14 has calculation element 26 in addition and on signalling technique, is connected to the analog to digital converter equipment 28 between metering circuit device 18 and calculation element 26 medially.System 10 comprises other calculation element 30 in addition, and this calculation element is connected with the calculation element 26 of measurement mechanism 12,14 by communication path (double-head arrow 32) in data transmission technology.The calculation element 30 of the calculation element 26 of measurement mechanism 12,14 and the other of measurement mechanism outside is constructed to microcontroller (μ C) 34.
In the concrete realization of shown embodiment, the sensor of two measurement mechanisms 12,14 is therefore based on corresponding shunt resistance 20, and this shunt resistance is connected in corresponding input circuit 22.Therefore the circuit arrangement 18 with shunt resistance 20 and circuit 22 also can be called as a point flow sensor.Rearmounted amplifier circuit 24 is implemented as PGA.The calculation element 26 of measurement mechanism 12,14 is constructed to microcontroller (μ C) 34 respectively.The other calculation element 30 of measurement mechanism outside is can the battery control equipment (BCU:BatteryControlUnit(electric battery control module) of electric battery of recharge) microcontroller 34.System has WDA assembly 36 in addition, and this WDA assembly is connected with other calculation element 30 by communication path (double-head arrow 32) on data communication technology.Communication path is preferably provided by bus system.
Obtain following functions:
The corresponding microcontroller (μ C) 34 of intelligent device for measuring 12,14 by with BCU(BatteryControlUnit) microcontroller μ C34 inquire response communication and be examined/monitor.At this, with in E gas 3 layers of monitoring scheme similarly, the μ C34 as supervisory control comuter 30 of BCU generates inquiry and the corresponding response of the μ C34 of monitoring intelligent measurement mechanism 12,14.If the μ C34 of intelligent device for measuring 12,14 replys inquiry mistakenly or do not reply, so the μ C of BCU introduces corresponding wrong reaction.Described reaction can from the replacement of hardware until to the transition (such as by opening gate) the battery state of safety.In order to impel opening of (unshowned) gate, corresponding signal is sent to the corresponding assembly 36 of electric battery.
In a simple embodiment, calculation element 30 is such as inquired about the counter status of the counter of process of measurement and the quantity of the measured value of described counter status and output is compared in the calculation element 26 being constructed to μ C of intelligent device for measuring 12,14, so that check measurement program loop is complete by the running of regulation.
By the inquire response communication between the calculation element 26 being constructed to μ C of intelligent device for measuring 12,14 and the other calculation element 30 of the μ C that is constructed to BCU, can the vicious function in RAM/ROM region of the calculation element 26 being constructed to μ C of monitoring intelligent measurement mechanism 12,14 and the vicious function of computing machine core.
Additionally, communicated by this inquire response, the also automatically jointly monitored and further security therefore contributed in system 10 of the communication path (such as CAN, LIN bus) between the μ C of μ C and BCU of Intelligent current sensor improves.
For cost reduction and for improve functional safe on the other hand redundant system altogether because of mistake (CommonCauseFehler) diagnosis that communicated by inquire response.Can occur systematic altogether because of mistake in the system 10 of Redundancy Design, and described altogether because mistake can not be detected most possibly by pure confidence level test.Communicated by inquire response, the confidence level test result of the functional and sensor of each independent measurement mechanism in intelligent device for measuring 12,14 is independently examined.Because be provided with two in system 10 for measuring the measurement mechanism 12,14 flowing through the electric current I of current path 16 redundantly, so the adjustment (double-head arrow 38) of measurement result can be carried out and therefore identify and eliminate possible measuring error.Corresponding compensation realizes by other calculation element 30 with as the communication path that double-head arrow 32 represents equally.
Claims (10)
1. for checking that at least one is for measuring the electric current I flowing through current path (16), the particularly measurement mechanism (12 of battery pack current, 14) method, at least one measurement mechanism (12 wherein said, 14) there is the calculation element (26) for controlling and/or regulate described measurement, it is characterized in that, be provided with for monitoring at least one measurement mechanism (12 described, 14) measurement by the calculation element (26) of described measurement mechanism by the control of regulation and/or the other calculation element (30) of adjustment, described other calculation element and at least one measurement mechanism (12 described, 14) described calculation element (26) communicates by inquire response communication.
2. method according to claim 1, is characterized in that, is provided with at least two for measuring the measurement mechanism (12,14) flowing through the electric current I of described current path (16) redundantly.
3. method according to claim 2, is characterized in that, described inquire response communication is used to the measurement result adjusting described measurement mechanism (12,14) in addition.
4. according to the method one of the claims Suo Shu, it is characterized in that, described other calculation element (30) introduces wrong reaction when recognizing the control of measurement of described at least one measurement mechanism (12,14) and/or wrong in regulating.
5. method according to claim 4, is characterized in that, described wrong reaction comprises:
-export corresponding error notification and/or
-reset corresponding measurement mechanism (12,14) calculation element (26) and/or
-handle the current source producing described electric current I, the battery apparatus particularly producing described battery pack current.
6. according to the method one of the claims Suo Shu, it is characterized in that, at least one in described calculation element (26,30) is constructed to microcontroller (32).
7. system (10), especially for the system performed according to the method one of the claims Suo Shu, there is at least one for measuring the electric current I flowing through current path (16), the particularly measurement mechanism (12 of battery pack current, 14), at least one measurement mechanism (12 wherein said, 14) there is the calculation element (26) for controlling and/or regulate described measurement, particularly microcontroller (32), it is characterized in that other calculation element (30), described other calculation element is in order to monitor at least one measurement mechanism (12 described, 14) measurement by the control of the calculation element (26) of described measurement mechanism and/or regulate in the communication technology with at least one measurement mechanism (12 described, 14) described calculation element (26) connects, make communication can be implemented as inquire response communication.
8. system according to claim 7, is characterized in that, at least one in described measurement mechanism (12,14) or described measurement mechanism (12,14) has in addition:
-metering circuit device (18), is connected with the shunt resistance (20) that can be inserted in described current path (16) in described metering circuit device, and
-on signalling technique, be connected to analog to digital converter equipment (32) between described metering circuit device (18) and described calculation element (26) medially.
9. the system according to claim 7 or 8, is characterized in that, described metering circuit device (18) has amplifier apparatus (24).
10. according to the system one of the claims Suo Shu, it is characterized in that, the communication path communicated for described inquire response is provided by field bus system, particularly automobile field bus system.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014216419.2A DE102014216419A1 (en) | 2014-08-19 | 2014-08-19 | Method for checking at least one measuring device for measuring an electric current flowing through a current path |
| DE102014216419.2 | 2014-08-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105372609A true CN105372609A (en) | 2016-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510506937.0A Pending CN105372609A (en) | 2014-08-19 | 2015-08-18 | Method for checking at least one measuring device for measuring a current flowing through a current path of electric current |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105372609A (en) |
| DE (1) | DE102014216419A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752652A (en) * | 2017-11-07 | 2019-05-14 | 上海大郡动力控制技术有限公司 | The method of sampling of permanent magnet synchronous motor phase current |
| CN111656203A (en) * | 2018-02-01 | 2020-09-11 | 罗伯特·博世有限公司 | Measuring module for an on-board electrical system and associated on-board electrical system for a vehicle |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3104261B1 (en) * | 2019-12-06 | 2021-12-17 | Psa Automobiles Sa | Secure current measurement device for autonomous vehicles. |
| CN113960350A (en) * | 2021-10-22 | 2022-01-21 | 浙江朗德电子科技有限公司 | High-safety-level multi-channel current sensor and measuring method thereof |
| DE102022207854A1 (en) * | 2022-07-29 | 2024-02-01 | Continental Automotive Technologies GmbH | Current sensor |
| DE102022207853A1 (en) * | 2022-07-29 | 2024-02-01 | Continental Automotive Technologies GmbH | Current sensor |
| DE102022210607A1 (en) * | 2022-10-07 | 2024-04-18 | Robert Bosch Gesellschaft mit beschränkter Haftung | Sensor for detecting an electric current flowing through a conductor |
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| US20090206841A1 (en) * | 2008-02-15 | 2009-08-20 | Sam Weng | Intelligent fault-tolerant battery management system |
| US8384354B2 (en) * | 2009-10-15 | 2013-02-26 | GM Global Technology Operations LLC | Sensor arrangement and method of using the same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10057486A1 (en) * | 2000-06-15 | 2016-10-13 | Continental Teves Ag & Co. Ohg | Semiconductor switching device defect recognition method e.g. for sense field effect transistor, involves measuring current on switched contacts of switching device redundantly |
| DE102010041275B4 (en) | 2010-09-23 | 2019-11-28 | Robert Bosch Gmbh | Procedure for checking the proper functioning of a current sensor |
-
2014
- 2014-08-19 DE DE102014216419.2A patent/DE102014216419A1/en not_active Withdrawn
-
2015
- 2015-08-18 CN CN201510506937.0A patent/CN105372609A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090206841A1 (en) * | 2008-02-15 | 2009-08-20 | Sam Weng | Intelligent fault-tolerant battery management system |
| US8384354B2 (en) * | 2009-10-15 | 2013-02-26 | GM Global Technology Operations LLC | Sensor arrangement and method of using the same |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752652A (en) * | 2017-11-07 | 2019-05-14 | 上海大郡动力控制技术有限公司 | The method of sampling of permanent magnet synchronous motor phase current |
| CN109752652B (en) * | 2017-11-07 | 2021-02-02 | 上海大郡动力控制技术有限公司 | Phase current sampling method for permanent magnet synchronous motor |
| CN111656203A (en) * | 2018-02-01 | 2020-09-11 | 罗伯特·博世有限公司 | Measuring module for an on-board electrical system and associated on-board electrical system for a vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102014216419A1 (en) | 2016-02-25 |
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Application publication date: 20160302 |
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