CN102778649A - SOC (System on Chip) estimation method - Google Patents
SOC (System on Chip) estimation method Download PDFInfo
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- CN102778649A CN102778649A CN2011104414214A CN201110441421A CN102778649A CN 102778649 A CN102778649 A CN 102778649A CN 2011104414214 A CN2011104414214 A CN 2011104414214A CN 201110441421 A CN201110441421 A CN 201110441421A CN 102778649 A CN102778649 A CN 102778649A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention belongs to the technical field of electric automobiles, and designs an SOC (System on Chip) estimation method for an electric automobile. The method comprises the following steps of obtaining a current SOC value according to an ampere-hour integral; and correcting the SOC value by adopting a plurality of steps. According to the method, the SOC value can be corrected in real time according to different ambient temperatures and vehicle situations, so that the SOC value is real and accurate, the accuracy of data of an electric automobile management system is ensured, and the running stability of the electric automobile is enhanced.
Description
Technical field
The present invention relates to the evaluation method of a kind of electric automobile SOC.
Background technology
Current SOC value (battery nuclear power state, State of Charge) is just calculated to real-time ampere-hour integration, promptly calculates the long-pending of interior electric current of certain hour and time; Drawing the ampere-hour amount (DELTA_AH=I * t) of variation, is DELTA_AH if emit ampere-hour, and establishing the original total ampere-hour of battery is SUM_AH; Draw its SOC=((SUM_AH-DELTA_AH)/SUM_AH) * 100% after the discharge; But because of always there is error in the calculating of its electric current " I ", causes and in computation process, produced certain cumulative errors, after use a period of time; The actual capacity that can not accurately reflect current electric battery; Cause illusion to the user, when battery does not have energy, still effectively do not remind.
Summary of the invention
In view of this, the present invention's technical matters that will solve provides true, the accurate SOC evaluation method of a kind of estimation.
The present invention adopts following scheme to realize:
A kind of SOC evaluation method, this method comprise the SOC currency step that draws according to the ampere-hour integration, and this method also has following steps:
A. electric battery is carried out simulation test, obtain electric battery battery cell magnitude of voltage and actual SOC value corresponding data under each serviceability temperature, and draw the slope of battery cell voltage under the adjacent two temperatures;
B. when voltage during continually and steadily at a state; Through battery management system the battery voltage value is repeatedly sampled; Draw the battery cell magnitude of voltage, the highest and minimum temperature of the electric battery that battery management system is obtained averages, and draws the current temperature value of electric battery;
C. the data that obtain in the batteries monomer magnitude of voltage that obtains in the b step and current temperature value and a step are corresponding, data obtain the actual SOC of current electric battery from a step, define this and are worth the modified value for SOC;
D. this SOC modified value is carried out validity and judge, effectively get into next step, the invalid b step of then returning;
E. obtain this effective SOC modified value, this SOC modified value is current SOC value.
Wherein, the validity determination methods in the e step is: carry out b, c procedure again, calculate the SOC modified value again one time; Whether the SOC modified value of relatively obtaining for twice differs in the scope of regulation; And the SOC modified value representes then that greater than 0, less than 50% this SOC modified value is effective, otherwise invalid.
The present invention can revise the SOC value in real time according to different temperature environment, vehicle condition, and the SOC value is true, precision is high, has guaranteed the accuracy of electric automobile Management System Data, has also improved the stable of electric automobile operation.
Embodiment
Below will combine embodiment that the present invention is described in further detail for the ease of it will be appreciated by those skilled in the art that:
The SOC evaluation method that present embodiment discloses can be revised the SOC value automatically, guarantees the authenticity and the precision of SOC value, and this method comprises the SOC currency step that draws according to the ampere-hour integration, and has following steps:
A. electric battery is carried out simulation test; Obtain electric battery battery cell magnitude of voltage and actual SOC value corresponding data under each serviceability temperature; And draw the slope of battery cell voltage under the adjacent two temperatures, and temperature range can be between-5 degree to 60 degree, and per 5 degree are got a sub-value;
B. when voltage during continually and steadily at a state; Through battery management system the battery voltage value is repeatedly sampled; Draw the battery cell magnitude of voltage, the highest and minimum temperature of the electric battery that battery management system is obtained averages, and draws the current temperature value of electric battery;
C. the data that obtain in the batteries monomer magnitude of voltage that obtains in the b step and current temperature value and a step are corresponding, data obtain the actual SOC of current electric battery from a step, define this and are worth the modified value for SOC;
D. this SOC modified value is carried out validity and judge, effectively get into next step, the invalid b step of then returning;
E. obtain this effective SOC modified value, this SOC modified value is current SOC value.
Wherein, Validity determination methods in the d step is: carry out b, c procedure again, calculate the SOC modified value again one time, whether the SOC modified value of relatively obtaining for twice differs in the scope of regulation; Such as whether in 4% scope; And the SOC modified value representes then that greater than 0, less than 50% this SOC modified value is effective, otherwise invalid.
Wherein, In the c step; If batteries monomer voltage that in the b step, obtains and Current Temperatures be not in the data list of a step, but between two electrical voltage points, the slope of battery cell voltage obtains the corresponding relation of voltage and SOC under the adjacent two temperatures then capable of using.
More than be wherein concrete implementation of the present invention, it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these conspicuous replacement forms all belong to protection scope of the present invention.
Claims (2)
1. SOC evaluation method, this method comprises the SOC currency step that draws according to the ampere-hour integration, it is characterized in that this method also has following steps:
A. electric battery is carried out simulation test, obtain electric battery battery cell magnitude of voltage and actual SOC value corresponding data under each serviceability temperature, and draw the slope of battery cell voltage under the adjacent two temperatures;
B. when voltage during continually and steadily at a state; Through battery management system the battery voltage value is repeatedly sampled; Draw the battery cell magnitude of voltage, the highest and minimum temperature of the electric battery that battery management system is obtained averages, and draws the current temperature value of electric battery;
C. the data that obtain in the batteries monomer magnitude of voltage that obtains in the b step and current temperature value and a step are corresponding, data obtain the actual SOC of current electric battery from a step, define this and are worth the modified value for SOC;
D. this SOC modified value is carried out validity and judge, effectively get into next step, the invalid b step of then returning;
E. obtain this effective SOC modified value, this SOC modified value is current SOC value.
2. SOC evaluation method according to claim 1; It is characterized in that the validity determination methods in the e step is: carry out b, c procedure again, calculate the SOC modified value again one time; Whether the SOC modified value of relatively obtaining for twice differs in the scope of regulation; And the SOC modified value representes then that greater than 0, less than 50% this SOC modified value is effective, otherwise invalid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011104414214A CN102778649A (en) | 2011-12-26 | 2011-12-26 | SOC (System on Chip) estimation method |
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| CN2011104414214A CN102778649A (en) | 2011-12-26 | 2011-12-26 | SOC (System on Chip) estimation method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048626A (en) * | 2012-12-17 | 2013-04-17 | 惠州市亿能电子有限公司 | Method for accurately estimating SOC (State of Charge) |
| CN103513188A (en) * | 2013-10-15 | 2014-01-15 | 清华大学 | Power calculation method of single battery in power system energy storage station |
| CN104051810A (en) * | 2014-06-25 | 2014-09-17 | 中国东方电气集团有限公司 | Rapid correction method for SOC (state of charge) estimation of energy storage lithium ion battery system |
| CN104859454A (en) * | 2014-12-19 | 2015-08-26 | 北汽福田汽车股份有限公司 | SOC calculated value verification method and device |
| CN106872906A (en) * | 2017-03-14 | 2017-06-20 | 江西江铃集团新能源汽车有限公司 | A kind of method and system based on OCV curve amendments SOC |
| CN106970328A (en) * | 2017-01-17 | 2017-07-21 | 深圳市沛城电子科技有限公司 | A kind of SOC estimation method and device |
| CN110879365A (en) * | 2018-09-05 | 2020-03-13 | 本田技研工业株式会社 | Information providing device, information providing method, and storage medium |
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| CN101551444A (en) * | 2008-04-03 | 2009-10-07 | 现代自动车株式会社 | Method for estimating remaining capacity of battery |
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| WO2004053510A1 (en) * | 2002-12-11 | 2004-06-24 | Japan Storage Battery Co., Ltd. | Battery charged condition computing device and battery charged condition computing method |
| CN101142542A (en) * | 2005-03-17 | 2008-03-12 | Lg化学株式会社 | Method of implementation reference value of state of charge algorithm verification in battery using ah counting and ocv hysteresis |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048626A (en) * | 2012-12-17 | 2013-04-17 | 惠州市亿能电子有限公司 | Method for accurately estimating SOC (State of Charge) |
| CN103048626B (en) * | 2012-12-17 | 2015-04-15 | 惠州市亿能电子有限公司 | Method for accurately estimating SOC (State of Charge) |
| CN103513188A (en) * | 2013-10-15 | 2014-01-15 | 清华大学 | Power calculation method of single battery in power system energy storage station |
| CN103513188B (en) * | 2013-10-15 | 2016-02-10 | 清华大学 | The electricity computing method of battery cell in a kind of electric system energy storage station |
| CN104051810A (en) * | 2014-06-25 | 2014-09-17 | 中国东方电气集团有限公司 | Rapid correction method for SOC (state of charge) estimation of energy storage lithium ion battery system |
| CN104051810B (en) * | 2014-06-25 | 2016-04-06 | 中国东方电气集团有限公司 | A kind of lithium-ion energy storage battery system SOC estimates rapid correction method |
| CN104859454A (en) * | 2014-12-19 | 2015-08-26 | 北汽福田汽车股份有限公司 | SOC calculated value verification method and device |
| CN104859454B (en) * | 2014-12-19 | 2017-04-05 | 北汽福田汽车股份有限公司 | A kind of method of calibration and device of SOC calculated values |
| CN106970328A (en) * | 2017-01-17 | 2017-07-21 | 深圳市沛城电子科技有限公司 | A kind of SOC estimation method and device |
| CN106872906A (en) * | 2017-03-14 | 2017-06-20 | 江西江铃集团新能源汽车有限公司 | A kind of method and system based on OCV curve amendments SOC |
| CN106872906B (en) * | 2017-03-14 | 2019-08-09 | 江西江铃集团新能源汽车有限公司 | A kind of method and system based on OCV curve amendment SOC |
| CN110879365A (en) * | 2018-09-05 | 2020-03-13 | 本田技研工业株式会社 | Information providing device, information providing method, and storage medium |
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Application publication date: 20121114 |