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.004a" src="https://static.hindawi.com/articles/jam/volume-2014/348537/figures/348537.fig.004a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Measured and calculated battery voltage with 1/3C discharge</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="348537.fig.004b" src="https://static.hindawi.com/articles/jam/volume-2014/348537/figures/348537.fig.004b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Calculated battery voltage error with 1/3C discharge</td></tr></table></td></tr><tr class="fig-image" id="c"><td><img alt="348537.fig.004c" src="https://static.hindawi.com/articles/jam/volume-2014/348537/figures/348537.fig.004c.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(c) </b>Trajectories of the optimization variables</td></tr></table></td></tr><tr class="fig-image" id="d"><td><img alt="348537.fig.004d" src="https://static.hindawi.com/articles/jam/volume-2014/348537/figures/348537.fig.004d.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(d) </b>Cost function of the optimization variables</td></tr></table></td></tr></table>

<table>The parameters estimation results with 1/3C discharge.</table>

Journal of Applied Mathematics

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Figure 4

Figure 4: Estimation of State of Charge for Lithium-Ion Battery Based on Finite Difference Extended Kalman Filter 