Estimation of State of Charge for Lithium-Ion Battery Based on Finite Difference Extended Kalman Filter

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="348537.fig.007a" src="https://static.hindawi.com/articles/jam/volume-2014/348537/figures/348537.fig.007a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Terminal current/voltage curves of changing-current discharge pulse</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="348537.fig.007b" src="https://static.hindawi.com/articles/jam/volume-2014/348537/figures/348537.fig.007b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>SOC estimation results of changing-current discharge pulse</td></tr></table></td></tr><tr class="fig-image" id="c"><td><img alt="348537.fig.007c" src="https://static.hindawi.com/articles/jam/volume-2014/348537/figures/348537.fig.007c.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(c) </b>SOC estimation errors of changing-current discharge pulse</td></tr></table></td></tr></table>

<table>Comparison of SOC estimation and error curve of changing-current discharge pulse.</table>

Journal of Applied Mathematics

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Figure 7

Figure 7: Estimation of State of Charge for Lithium-Ion Battery Based on Finite Difference Extended Kalman Filter 