答案1
我猜你想要
\smartdiagramset{arrow style=<->, back arrow disabled}
\documentclass[border=3mm]{standalone}
\usepackage{smartdiagram}
\begin{document}
\smartdiagramset{arrow style=<->, back arrow disabled}
\smartdiagram[flow diagram:horizontal]{Banco de Baterias, Conversor CC-CC, Inversor CC-CA, Rede}
\end{document}