## 5 Conclusion  
In this paper, we proposed a simple voltage-based cell balance method for the battery with a relatively small capacity as much as possible. The proposed cell balance method is applied. \begin{table}
\begin{tabular}{c c c c c c c c c c c} \hline \hline \multicolumn{2}{c}{**Parameter**} & \multicolumn{2}{c}{**Bat \#1**} & \multicolumn{2}{c}{**Bat \#2**} & \multicolumn{2}{c}{**Bat \#3**} & \multicolumn{2}{c}{**Bat \#4**} \\ \hline Volt. ref. cell balance & Max. Volt. & \(\uparrow\) 0.015 V & \(\uparrow\) 0.023 V & \(\uparrow\) 0.048 V & \(\uparrow\) 0.015 V \\  & SOC Use & 91.04\(\%\)\(\rightarrow\) 87.16\% & 90.15\(\%\)\(\rightarrow\) 82.25\% & 92.03\(\%\)\(\rightarrow\) 93.16\% & 91.04\(\%\)\(\rightarrow\) 87.16\% \\  & SOH & \(\downarrow\) 62.06\% & \(\downarrow\) 60.20\% & \(\downarrow\) 64.15\% & \(\downarrow\) 62.06\% & \(\downarrow\) 62.06\% \\  & Cycles & & 4176 Cycles & & & & & \\ \hline \multirow{2}{*}{Proposed cell balance} & Max. Volt. & \(\uparrow\) 0.022 V & \(\uparrow\) 0.021 V & \(\uparrow\) 0.004 V & \(\uparrow\) 0.022 V \\  & SOC Use & 91.04\(\%\)\(\rightarrow\) 83.72\% & 91.11\(\%\)\(\rightarrow\) 78.64\% & 92.03\(\%\)\(\rightarrow\) 92.09\% & 91.04\(\%\)\(\rightarrow\) 83.72\% \\  & SOH & \(\downarrow\) 60.40\% & \(\downarrow\) 58.25\% & \(\downarrow\) 63.63\% & \(\downarrow\) 60.40\% \\  & Cycles & & & & & & & \\ \hline \multirow{2}{*}{Volt. ref. cell balance} & Max. Volt. & \(\uparrow\) 0.008 V & \(\uparrow\) 0.011 V & \(\uparrow\) 0.072 V & \(\uparrow\) 0.008 V \\  & SOC Use & 90.50\(\%\)\(\rightarrow\) 82.40\% & 88.67\(\%\)\(\rightarrow\) 74.11\% & 92.35\(\%\)\(\rightarrow\) 94.14\% & 90.50\(\%\)\(\rightarrow\) 82.40\% \\  & SGH & \(\downarrow\) 61.07\% & \(\downarrow\) 57.60\% & \(\downarrow\) 65.25\% & \(\downarrow\) 61.07\% \\  & Cycles & & & & & & & \\ \hline \multirow{2}{*}{Proposed cell balance} & Max. Volt. & \(\uparrow\) 0.050 V & \(\uparrow\) 0.051 V & \(\downarrow\) 0.108 V & \(\uparrow\) 0.050 V \\  & SOC Use & 90.43\(\%\)\(\rightarrow\) 71.35\% & 88.66\(\%\)\(\rightarrow\) 64.76\% & 92.35\(\%\)\(\rightarrow\) 88.94\% & 90.43\(\%\)\(\rightarrow\) 71.35\% \\  & SGH & \(\downarrow\) 55.93\% & \(\downarrow\) 52.40\% & \(\downarrow\) 63.93\% & \(\downarrow\) 55.93\% \\  & Cycles & & & & & & & \\ \hline \multirow{2}{*}{Volt. ref. cell balance} & Max. Volt. & \(\uparrow\) 0.008 V & \(\uparrow\) 0.016 V & \(\uparrow\) 0.088 V & \(\uparrow\) 0.008 V \\  & SOC Use & 89.84\(\%\)\(\rightarrow\) 77.48\% & 87.16\(\%\)\(\rightarrow\) 67.03\% & 92.61\(\%\)\(\rightarrow\) 95.10\% & 89.84\(\%\)\(\rightarrow\) 77.48\% \\  & SGH & \(\downarrow\) 59.25\% & \(\downarrow\) 55.38\% & \(\downarrow\) 66.62\% & \(\downarrow\) 59.25\% \\  & Cycles & & & & & & & \\ \hline \multirow{2}{*}{Proposed cell balance} & Max. Volt. & \(\uparrow\) 0.095 V & \(\uparrow\) 0.112 V & \(\downarrow\) 0.192 V & \(\uparrow\) 0.095 V \\  & SOC Use & 89.77\(\%\)\(\rightarrow\) 45.44\% & 87.15\(\%\)\(\rightarrow\) 41.86\% & 92.61\(\%\)\(\rightarrow\) 66.81\% & 89.77\(\%\)\(\rightarrow\) 45.44\% \\  & SGH & \(\downarrow\) 43.83\% & \(\downarrow\) 40.81\% & \(\downarrow\) 60.62\% & \(\downarrow\) 43.83\% \\ \hline \hline \end{tabular}
\end{table} 
Table 10: Comparison of simulation results when cell balance is adjusted based on a simple voltage difference and when the proposed voltage-based reordering cell balancing method is applied.