A battery module can include multiple cell tubes and a conductive plate. The multiple cell tubes can accommodate multiple battery cells within the multiple cell tubes so that individual of the multiple battery cells are positioned within individual of the multiple cell tubes. The conductive plate can include a printed circuit board. The printed circuit board can include a first conductive layer and an isolating layer. The isolating layer can include a blind hole through which a wire bonding extends. The wire bonding can be electrically connected to the first conductive layer.