Article(id=1200066380117671954, tenantId=1146029695717560320, journalId=1189918454225211397, issueId=1200066375055143911, articleNumber=null, orderNo=null, doi=10.20104/j.cnki.1674-6546.20220027, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=null, receivedDateStr=null, revisedDate=1666713600000, revisedDateStr=2022-10-26, acceptedDate=null, acceptedDateStr=null, onlineDate=1764047721174, onlineDateStr=2025-11-25, pubDate=1676390400000, pubDateStr=2023-02-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1764047721174, onlineIssueDateStr=2025-11-25, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1764047721174, creator=13701087609, updateTime=1764047721174, updator=13701087609, issue=Issue{id=1200066375055143911, tenantId=1146029695717560320, journalId=1189918454225211397, year='2023', volume='', issue='2', pageStart='1', pageEnd='48', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1764047719967, creator=13701087609, updateTime=1764047838602, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1200066872696733700, tenantId=1146029695717560320, journalId=1189918454225211397, issueId=1200066375055143911, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1200066872696733701, tenantId=1146029695717560320, journalId=1189918454225211397, issueId=1200066375055143911, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=1, endPage=8, ext={EN=ArticleExt(id=1200066381396934688, articleId=1200066380117671954, tenantId=1146029695717560320, journalId=1189918454225211397, language=EN, title=Estimation of Battery Charge State Based on MVASOEKF Algorithm, columnId=null, journalTitle=Automotive Engineer, columnName=null, runingTitle=null, highlight=null, articleAbstract=
In order to solve the problem of State Of Charge (SOC) estimation error and ill-conditioned covariance in the iteration process caused by nonlinear transformation ignoring the high-order Taylor term in Extended Kalman Filter (EKF) algorithm, a Modified Covariance Approximate Second-Order Extended Kalman Filter (MVASOEKF) algorithm was adopted. Through the hybrid pulse power characteristic experiment, the internal parameters of the equivalent model were identified offline and the second-order RC equivalent battery model was established. The SOC was estimated on MATLAB/Simulink platform. The results show that the average absolute error value of EKF algorithm is about 2.0%, and the average absolute error value of MVASOEKF algorithm is about 0.5%. Compared with EKF algorithm, although MVASOEKF algorithm has more computation amount, but the SOC estimation accuracy has been significantly improved, and the convergence is better.
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为解决扩展卡尔曼滤波(EKF)算法中由非线性变换忽略高阶泰勒项引起的荷电状态(SOC)估算误差和在迭代过程中协方差容易出现病态的问题,采用修正协方差近似二阶扩展卡尔曼滤波(MVASOEKF)算法,通过混合脉冲功率特性试验对等效模型内部参数进行离线辨识并建立了二阶RC等效电池模型,在MATLAB/Simulink平台上进行SOC估算,结果表明,EKF算法估算平均绝对误差约为2.0%,MVASOEKF算法估算平均绝对误差约为0.5%,与EKF算法相比,MVASOEKF算法虽增加了一定的计算量,但是SOC估计精度明显改善,且收敛性更好。
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二阶RC电池模型, figureFileSmall=REpDBQSl1ZlSKGGuTCJpyg==, figureFileBig=K6VUAPmyzl/p4YvLgtQLOQ==, tableContent=null), ArticleFig(id=1200066387948437951, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066380117671954, language=EN, label=null, caption=null, figureFileSmall=rrj4+5yC6/Cl1jx7pUOmMg==, figureFileBig=FewxkDcxByR/dkHHCWGugg==, tableContent=null), ArticleFig(id=1200066388086849996, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066380117671954, language=CN, label=图2, caption=
HPPC脉冲电流与电压变化曲线, figureFileSmall=rrj4+5yC6/Cl1jx7pUOmMg==, figureFileBig=FewxkDcxByR/dkHHCWGugg==, tableContent=null), ArticleFig(id=1200066388246233563, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066380117671954, language=EN, label=null, caption=null, figureFileSmall=jWzJLJ7wSJMoBxJwKeglnQ==, figureFileBig=vA8pi5jIFPJMjg6Lv0Yw5Q==, tableContent=null), ArticleFig(id=1200066388372062698, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066380117671954, language=CN, label=图3, caption=
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BBDST工况数据, figureFileSmall=aD9+DddE3mmcVf3zjPebfw==, figureFileBig=ofGP9kRsTV2xNg1+jQAeiQ==, tableContent=null), ArticleFig(id=1200066388766327314, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066380117671954, language=EN, label=null, caption=null, figureFileSmall=8U5QlagiV1d0us/PE98z0A==, figureFileBig=SYNgo5hF0WmibdJYRftXGA==, tableContent=null), ArticleFig(id=1200066388900545058, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066380117671954, language=CN, label=图5, caption=
电池等效模型估计值及误差, figureFileSmall=8U5QlagiV1d0us/PE98z0A==, figureFileBig=SYNgo5hF0WmibdJYRftXGA==, tableContent=null), ArticleFig(id=1200066389009596974, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066380117671954, language=EN, label=null, caption=null, figureFileSmall=SJG0x6lu9Me0X7ZRpZu+zg==, figureFileBig=CNiJuBHga/o7owoOVPYdLQ==, tableContent=null), ArticleFig(id=1200066390163030591, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066380117671954, language=CN, label=图6, caption=
初始SOC为0.98时的估算值及误差, figureFileSmall=SJG0x6lu9Me0X7ZRpZu+zg==, figureFileBig=CNiJuBHga/o7owoOVPYdLQ==, tableContent=null), ArticleFig(id=1200066390343385677, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066380117671954, language=EN, label=null, caption=null, figureFileSmall=cVNJIzHTC4nfEZ3NaWI6iA==, figureFileBig=4luFeZbnkoyF/TVq6Oqkyw==, tableContent=null), ArticleFig(id=1200066390477603417, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066380117671954, language=CN, label=图7, caption=
初始SOC为0.70时的估算值及误差, figureFileSmall=cVNJIzHTC4nfEZ3NaWI6iA==, figureFileBig=4luFeZbnkoyF/TVq6Oqkyw==, tableContent=null), ArticleFig(id=1200066390628598372, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066380117671954, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 取值 |
| 额定容量/mA·h | 3 300 |
| 标称容量/mA·h | 3 500 |
| 标称电压/V | 3.6 |
| 放电截止电压/V | 2.5 |
| 充电截止电压/V | 4.2±0.1 |
| 标准充电电流/A | 0.99 |
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Panasonic-18650电池参数
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| 参数 | 取值 |
| 额定容量/mA·h | 3 300 |
| 标称容量/mA·h | 3 500 |
| 标称电压/V | 3.6 |
| 放电截止电压/V | 2.5 |
| 充电截止电压/V | 4.2±0.1 |
| 标准充电电流/A | 0.99 |
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| Ssoc | Uoc/V | Ssoc | Uoc/V |
| 0.1 | 3.300 2 | 0.6 | 3.792 1 |
| 0.2 | 3.454 5 | 0.7 | 3.895 4 |
| 0.3 | 3.545 3 | 0.8 | 3.982 1 |
| 0.4 | 3.627 5 | 0.9 | 4.078 2 |
| 0.5 | 3.702 1 | 1.0 | 4.180 0 |
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SOC与OCV的关系
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| Ssoc | Uoc/V | Ssoc | Uoc/V |
| 0.1 | 3.300 2 | 0.6 | 3.792 1 |
| 0.2 | 3.454 5 | 0.7 | 3.895 4 |
| 0.3 | 3.545 3 | 0.8 | 3.982 1 |
| 0.4 | 3.627 5 | 0.9 | 4.078 2 |
| 0.5 | 3.702 1 | 1.0 | 4.180 0 |
), ArticleFig(id=1200066391291298454, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066380117671954, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| SOC | R0/Ω | R1/Ω | R2/Ω | C1/F | C2/F |
| 0.1 | 0.193 277 | 0.004 889 | 0.003 317 | 5 746.032 | 778.374 |
| 0.2 | 0.203 231 | 0.003 669 | 0.003 354 | 5 731.406 | 492.282 |
| 0.3 | 0.185 811 | 0.003 794 | 0.004 654 | 5 008.632 | 250.531 |
| 0.4 | 0.184 429 | 0.004 423 | 0.004 217 | 321.482 | 4 631.394 |
| 0.5 | 0.184 705 | 0.003 309 | 0.003 969 | 697.865 | 8 638.322 |
| 0.6 | 0.182 770 | 0.003 877 | 0.004 517 | 464.808 | 4 953.656 |
| 0.7 | 0.179 175 | 0.004 294 | 0.005 511 | 394.825 | 3 078.404 |
| 0.8 | 0.179 175 | 0.005 160 | 0.005 074 | 617.783 | 5 239.885 |
| 0.9 | 0.181 111 | 0.003 786 | 0.005 126 | 558.223 | 4 191.080 |
| 1.0 | 0.185 258 | 0.003 983 | 0.005 563 | 264.346 | 3 066.071 |
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不同SOC点处电池内部参数
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| SOC | R0/Ω | R1/Ω | R2/Ω | C1/F | C2/F |
| 0.1 | 0.193 277 | 0.004 889 | 0.003 317 | 5 746.032 | 778.374 |
| 0.2 | 0.203 231 | 0.003 669 | 0.003 354 | 5 731.406 | 492.282 |
| 0.3 | 0.185 811 | 0.003 794 | 0.004 654 | 5 008.632 | 250.531 |
| 0.4 | 0.184 429 | 0.004 423 | 0.004 217 | 321.482 | 4 631.394 |
| 0.5 | 0.184 705 | 0.003 309 | 0.003 969 | 697.865 | 8 638.322 |
| 0.6 | 0.182 770 | 0.003 877 | 0.004 517 | 464.808 | 4 953.656 |
| 0.7 | 0.179 175 | 0.004 294 | 0.005 511 | 394.825 | 3 078.404 |
| 0.8 | 0.179 175 | 0.005 160 | 0.005 074 | 617.783 | 5 239.885 |
| 0.9 | 0.181 111 | 0.003 786 | 0.005 126 | 558.223 | 4 191.080 |
| 1.0 | 0.185 258 | 0.003 983 | 0.005 563 | 264.346 | 3 066.071 |
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| 算法 | MAE | MRE | RMSE |
| MVASOEKF | 0.703 | 1.474 | 0.954 |
| EKF | 2.076 | 2.124 | 4.910 |
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初始SOC为0.98时不同算法下的估算精度 %
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| 算法 | MAE | MRE | RMSE |
| MVASOEKF | 0.703 | 1.474 | 0.954 |
| EKF | 2.076 | 2.124 | 4.910 |
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| 算法 | MAE | MRE | RMSE |
| MVASOEKF | 0.710 | 1.482 | 0.994 |
| EKF | 2.163 | 2.146 | 4.992 |
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初始SOC为0.70时不同算法下的估算精度 %
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| 算法 | MAE | MRE | RMSE |
| MVASOEKF | 0.710 | 1.482 | 0.994 |
| EKF | 2.163 | 2.146 | 4.992 |
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