发明名称 |
Method for Estimating State of Charge for Lithium-Ion Batteries |
摘要 |
A state of charge (SoC) a lithium-ion (Li+) battery is estimated at a time instant by first constructing a model of the Li+ battery based on a single particle operation. The model describes a relationship between the SoC, a charge current, a discharge current, and an output voltage. Using a nonlinear optimization, a function expressing a relationship between the SoC and an open circuit voltage is determined. The relationship is based on off-line measurements of the charge current, the discharge current, and the open-circuit voltage. Then, the SoC and parameters of the model are estimated concurrently, wherein the SoC and the parameters are based on the model, the function, and on-line measurements of the charge current, the discharge current, and the output voltage. |
申请公布号 |
US2014210418(A1) |
申请公布日期 |
2014.07.31 |
申请号 |
US201313752666 |
申请日期 |
2013.01.29 |
申请人 |
MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC. |
发明人 |
Wang Yebin;Fang Huazhen;Sahinoglu Zafer |
分类号 |
H02J7/00 |
主分类号 |
H02J7/00 |
代理机构 |
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代理人 |
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主权项 |
1. A method for estimating a state of charge (SoC) a lithium-ion (Li+) battery at a time instant, comprising the steps of:
constructing a model of the Li+ battery, wherein the model is based on a single particle operation of the Li+ battery, where the model describes a relationship between the SoC, a charge current, a discharge current, and an output voltage; determining, using a nonlinear optimization, a function expressing a relationship between the SoC and an open circuit voltage, wherein the relationship is based on off-line measurements of the charge current, the discharge current, and the open-circuit voltage; and estimating the SoC and parameters of the model concurrently, wherein the SoC and the parameters are based on the model, the function, and on-line measurements of the charge current, the discharge current, and the output voltage. |
地址 |
Cambridge MA US |