CN103412202A - Method for current partitioned calibration - Google Patents
Method for current partitioned calibration Download PDFInfo
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- CN103412202A CN103412202A CN2013102275409A CN201310227540A CN103412202A CN 103412202 A CN103412202 A CN 103412202A CN 2013102275409 A CN2013102275409 A CN 2013102275409A CN 201310227540 A CN201310227540 A CN 201310227540A CN 103412202 A CN103412202 A CN 103412202A
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Abstract
The invention discloses a method for current partitioned calibration, which comprises the following steps of: (1) identifying a replacement shunt; (2) dividing current measuring range of the shunt into small partitions; (3) calculating current sampling gain of each partition; (4) and carrying out compensating calculation on the current to obtain an actual current value according to the calculation results of the step (3). Through the automatic identification and automatic calibration of the shunt, the method for current partitioned calibration reduces a great deal of manpower demand in production by omitting manual current calibration, reduces the cost, increases the working efficiency, and avoids errors and mistakes caused by manual calibration; and the method performs partitioned gain calibration on the shunt measuring range, and compensates the current according to the gain calibration, thereby greatly reducing the error, and improving the measurement accuracy.
Description
Technical field
The invention of this reality relates to the method for a kind of electric current by stages calibration.
Background technology
The current sample major part of current battery management system is all to adopt the shunt scheme to realize, because there are a lot of models in shunt, when changing different shunts, battery management system just need to re-start manual calibration, is unfavorable for its industrialization.Also there is error the shunt of same model in itself, also needs to carry out manual calibration when changing the shunt of same model, and the calibration efficiency of battery management system electric current is low, is unfavorable for that it promotes the use of.The method of calibration is generally by shunt, applying two different electric currents, between the actual AD sampled value by measuring and the current value that applies, calculates the current measurement gain.And this metering system only applies the method for two different electric currents at present to shunt, the yield value obtained only has one, in the wider occasion of current measuring range, to the measurement of electric current, may be confined to keep degree of precision in a certain scope, can't guarantee the precision in gamut.Simultaneously, change shunt at every turn, need manual the calibration, inefficiency, intelligent degree is low, and the people is high for the probability of makeing mistakes.
Summary of the invention
In order to solve above-mentioned shunt, calibrate the deficiency be in, the invention provides the design proposal in school, a kind of electric current by stages.
The method of a kind of electric current by stages calibration comprises the following steps:
(1) shunt is identified; (2) current range of shunt is carried out to the minizone division; (3) calculate each interval current sample gain; (4) according to the result of calculation of step (3), electric current is compensated and calculates the acquisition actual current value.
Concrete, the described method that shunt is identified of step (1) is: for shunt provides a default normalized current, and measure its magnitude of voltage, and in the shunt model voltage table of comparisons, inquire about its model according to this magnitude of voltage.
More specifically, the described method that the current range of shunt is carried out to the minizone division of step (2) is: according to the range average mark of shunt, be slit into two or more intervals, and interval division information is stored.
More specifically, the method for calculating each interval current sample gain is: (31) for interval N(N=1, and 2,3 ...) in apply respectively
,
Two actual currents, then carry out respectively the current value that current sample calculates; (32) will sample two current values obtaining obtain corresponding through Binary Conversion
,
Two AD sampled values; (33) set up current sample gain computing formula:
The interval current gain value of each that (34) will calculate generates the gain table of comparisons and preserves.
Further, the method for acquisition actual current value is: (41) are to actual electric current
(x=1 wherein, 2,3 ...) sample and calculate its AD sampled value
, calculate the interval x at its place; (42) the inquiry gain table of comparisons, obtain the corresponding current sample yield value of interval x
(43) according to flowing sampling gain computing formula, have: actual current
.
Further, the method for building up of the described shunt model voltage table of comparisons is: use above-mentioned default normalized current to test respectively the shunt of different model, and record respectively the relevant voltage value, shunt is comprised to the relevant information of model, range and normalized current test voltage value writes the shunt model voltage table of comparisons and stores.
In sum, the present invention has following beneficial effect: (1), by automatic identification and automatic calibration to shunt, is exempted the manual calibration electricity and has been reduced a large amount of manpower requirement in production, has reduced cost, improved work efficiency, error and the mistake of also having avoided manual calibration to bring simultaneously; (2) the shunt range is carried out to the by stages gain and demarcate, and demarcate electric current is compensated according to gain, greatly reduce error, improve measuring accuracy.
Embodiment
In order to allow those skilled in the art can understand better technical scheme of the present invention, below the invention will be further elaborated.
The present invention has disclosed the method for a kind of electric current by stages calibration, it is characterized in that, comprises the following steps:
At first generate the shunt model voltage table of comparisons, use default normalized current to test respectively the shunt of different model, and record respectively the relevant voltage value, shunt is comprised to the relevant information of model, range and normalized current test voltage value writes the shunt model voltage table of comparisons and stores.The shunt of changing is identified, for shunt provides a default normalized current, and measured its magnitude of voltage, and in the shunt model magnitude of voltage table of comparisons, inquire about its model according to this magnitude of voltage.
According to the range average mark of shunt, be slit into two or more intervals, and interval division information is stored.Take a range as the shunt of 300A is example, be divided into an interval, i.e. 0～30A, 30～60A, 60～90A, 90～120A, 120～150A, 150～180A, 180～210A, 210～240A, 240～270A, 270～300A with 30A.
(3) for interval N(N=1,2,3 ...) in apply respectively
,
Two actual currents (
,
For any two current values in interval N), then carry out respectively the current value that current sample calculates; Two current values that sampling is obtained obtain corresponding through Binary Conversion
,
Two AD sampled values; Set up current sample gain computing formula:
,
Be N interval current sample gain; Each interval current sample gain is all calculated, and each interval current gain value generation gain table of comparisons that will obtain is preserved.
Use the current sample gain to compensate to calculate to electric current and obtain actual current value.To actual electric current
(x=1 wherein, 2,3 ...) sample and calculate its AD sampled value
, calculate the interval x at its place; The inquiry gain table of comparisons, obtain the corresponding current sample yield value of interval x
According to flowing sampling gain computing formula, have:
Be actual current:
.
The present embodiment is more excellent embodiment of the present invention, and the part be not described in detail all adopts known mature technology.It should be noted that; in the situation that do not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making according to the present invention various corresponding changes and distortion, but these changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (6)
1. the method for an electric current by stages calibration, is characterized in that, comprises the following steps:
(1) shunt is identified;
(2) current range of shunt is carried out to the minizone division;
(3) calculate each interval current sample gain;
(4) according to the result of calculation of step (3), electric current is compensated and calculates the acquisition actual current value.
2. the method for a kind of electric current according to claim 1 by stages calibration, it is characterized in that, the described method that shunt is identified of step (1) is: for shunt provides a default normalized current, and measure its magnitude of voltage, and according to this magnitude of voltage, inquire about its model in the shunt model voltage table of comparisons.
3. the method for a kind of electric current according to claim 2 by stages calibration, it is characterized in that, the described method that the current range of shunt is carried out to the minizone division of step (2) is: according to the range average mark of shunt, be slit into two or more intervals, and interval division information is stored.
4. the method for a kind of electric current according to claim 3 by stages calibration, is characterized in that, the method for calculating each interval current sample gain is:
(31) for interval N(N=1,2,3 ...) in apply respectively
,
Two actual currents, then carry out respectively the current value that current sample calculates;
(32) will sample two current values obtaining obtain corresponding through Binary Conversion
,
Two AD sampled values;
(33) set up current sample gain computing formula:
The interval current gain value of each that (34) will calculate generates the gain table of comparisons and preserves.
5. the method for a kind of electric current according to claim 4 by stages calibration, is characterized in that, the method that obtains actual current value is:
(41) to actual electric current
(x=1 wherein, 2,3 ...) sample and calculate its AD sampled value
, calculate the interval x at its place;
(42) the inquiry gain table of comparisons, obtain the corresponding current sample yield value of interval x
(43) according to flowing sampling gain computing formula, have:
Actual current
.
6. the method for a kind of electric current according to claim 2 by stages calibration, it is characterized in that, the method for building up of the described shunt model voltage table of comparisons is: use described default normalized current to test respectively the shunt of different model, and record respectively the relevant voltage value, shunt is comprised to the relevant information of model, range and normalized current test voltage value writes the shunt model voltage table of comparisons and stores.
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Cited By (17)
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| CN103713271A (en) * | 2013-12-13 | 2014-04-09 | 惠州市亿能电子有限公司 | BMS current detection unit automatic calibration device and calibration method |
| CN103995226A (en) * | 2013-12-27 | 2014-08-20 | 杭州长川科技有限公司 | Method for improving accuracy of analog integrated circuit test system |
| CN104833932A (en) * | 2014-07-03 | 2015-08-12 | 北汽福田汽车股份有限公司 | Drift amount calculating method of current sensor and calculating device |
| CN105093160A (en) * | 2015-07-28 | 2015-11-25 | 宁波三星电气股份有限公司 | Segmented compensation method for errors of electric energy meter |
| CN105223416A (en) * | 2015-09-17 | 2016-01-06 | 杭州海兴电力科技股份有限公司 | A kind of method improving intelligent electric meter measuring accuracy |
| CN105319434A (en) * | 2014-07-28 | 2016-02-10 | 国家电网公司 | Method and device applied to current measurement of electric energy meter |
| CN105589051A (en) * | 2014-11-18 | 2016-05-18 | 德信东源电力技术服务（北京）有限公司 | Method and device for calibrating current and method for detecting current |
| CN106227150A (en) * | 2016-07-15 | 2016-12-14 | 北京安控科技股份有限公司 | A kind of method and apparatus based on software stated accuracy |
| CN106483484A (en) * | 2015-08-27 | 2017-03-08 | 比亚迪股份有限公司 | Sampling scaling method and device |
| CN106980041A (en) * | 2017-03-31 | 2017-07-25 | 四川长虹电器股份有限公司 | A kind of current acquisition method of battery management system |
| CN107688161A (en) * | 2017-06-29 | 2018-02-13 | 惠州市蓝微新源技术有限公司 | The calibration of BMS a kind of and method of testing |
| CN109061543A (en) * | 2018-08-14 | 2018-12-21 | 国电南瑞科技股份有限公司 | A kind of intelligent electric energy meter measuring accuracy calibration method of adaptive dynamic adjustment |
| CN110015125A (en) * | 2017-08-17 | 2019-07-16 | 上海汽车集团股份有限公司 | A kind of coding, transmission method and the device of battery core voltage |
| CN112034408A (en) * | 2020-09-14 | 2020-12-04 | 桑顿新能源科技有限公司 | BMS current acquisition precision testing system and method and readable storage medium |
| CN112858983A (en) * | 2021-03-22 | 2021-05-28 | 云南省计量测试技术研究院 | Method and system for automatically calibrating shunt |
| CN113514688A (en) * | 2020-05-08 | 2021-10-19 | 苏州市春菊电器有限公司 | Method for improving BMS discharge current sampling precision |
| CN114252833A (en) * | 2021-12-21 | 2022-03-29 | 骆驼集团武汉新能源科技有限公司 | Method for BMS current calibration |
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| CN103713271A (en) * | 2013-12-13 | 2014-04-09 | 惠州市亿能电子有限公司 | BMS current detection unit automatic calibration device and calibration method |
| CN103995226B (en) * | 2013-12-27 | 2017-01-04 | 杭州长川科技股份有限公司 | For the method improving analog integrated circuit test system precision |
| CN103995226A (en) * | 2013-12-27 | 2014-08-20 | 杭州长川科技有限公司 | Method for improving accuracy of analog integrated circuit test system |
| CN104833932A (en) * | 2014-07-03 | 2015-08-12 | 北汽福田汽车股份有限公司 | Drift amount calculating method of current sensor and calculating device |
| CN104833932B (en) * | 2014-07-03 | 2017-12-08 | 北汽福田汽车股份有限公司 | The drift value computational methods and computing device of current sensor |
| CN105319434A (en) * | 2014-07-28 | 2016-02-10 | 国家电网公司 | Method and device applied to current measurement of electric energy meter |
| CN105589051A (en) * | 2014-11-18 | 2016-05-18 | 德信东源电力技术服务（北京）有限公司 | Method and device for calibrating current and method for detecting current |
| CN105093160A (en) * | 2015-07-28 | 2015-11-25 | 宁波三星电气股份有限公司 | Segmented compensation method for errors of electric energy meter |
| CN105093160B (en) * | 2015-07-28 | 2018-03-20 | 宁波三星医疗电气股份有限公司 | A kind of electric energy meter error segmented compensation method |
| CN106483484A (en) * | 2015-08-27 | 2017-03-08 | 比亚迪股份有限公司 | Sampling scaling method and device |
| CN105223416A (en) * | 2015-09-17 | 2016-01-06 | 杭州海兴电力科技股份有限公司 | A kind of method improving intelligent electric meter measuring accuracy |
| CN105223416B (en) * | 2015-09-17 | 2018-05-15 | 杭州海兴电力科技股份有限公司 | A kind of method for improving intelligent electric meter measuring accuracy |
| CN106227150A (en) * | 2016-07-15 | 2016-12-14 | 北京安控科技股份有限公司 | A kind of method and apparatus based on software stated accuracy |
| CN106980041A (en) * | 2017-03-31 | 2017-07-25 | 四川长虹电器股份有限公司 | A kind of current acquisition method of battery management system |
| CN107688161A (en) * | 2017-06-29 | 2018-02-13 | 惠州市蓝微新源技术有限公司 | The calibration of BMS a kind of and method of testing |
| CN110015125A (en) * | 2017-08-17 | 2019-07-16 | 上海汽车集团股份有限公司 | A kind of coding, transmission method and the device of battery core voltage |
| CN110015125B (en) * | 2017-08-17 | 2021-12-21 | 上海汽车集团股份有限公司 | Method and device for coding and transmitting cell voltage |
| CN109061543A (en) * | 2018-08-14 | 2018-12-21 | 国电南瑞科技股份有限公司 | A kind of intelligent electric energy meter measuring accuracy calibration method of adaptive dynamic adjustment |
| CN113514688A (en) * | 2020-05-08 | 2021-10-19 | 苏州市春菊电器有限公司 | Method for improving BMS discharge current sampling precision |
| CN112034408A (en) * | 2020-09-14 | 2020-12-04 | 桑顿新能源科技有限公司 | BMS current acquisition precision testing system and method and readable storage medium |
| CN112858983A (en) * | 2021-03-22 | 2021-05-28 | 云南省计量测试技术研究院 | Method and system for automatically calibrating shunt |
| CN112858983B (en) * | 2021-03-22 | 2023-04-28 | 云南省计量测试技术研究院 | Automatic calibration method and system for shunt |
| CN114252833A (en) * | 2021-12-21 | 2022-03-29 | 骆驼集团武汉新能源科技有限公司 | Method for BMS current calibration |
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