▎ 摘　　要

NOVELTY - Bipolar plate is at least the anode plate comprises a polymer material layer, and the polymer material layer is in contact with the conductive diffusion layer. USE - Bipolar plate used for single cell, for battery stack, and for battery (all claimed). ADVANTAGE - The plate reduces mass and volume of the battery, improves specific power of the battery, reduces whole cost of the battery and the galvanic pile, and improves stability of the battery. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a single cell, which comprises the bipolar plate, and the single cell is a fuel cell single cell, and the flow channel type of the flow field includes any one of a serpentine flow field, a straight channel flow field, an interdigital flow field, or a point flow field; (2) a battery stack is formed by connecting the single cells in series, where the battery stack is a fuel cell stack, and the single cells are stacked in one direction, or connected in series in a plane direction, and the series connection connects the cathode and anode of adjacent batteries through a conductive material; and (3) a battery comprises the single cell or the battery stack, where the battery is a fuel cell, and the fuel cell includes any one of a proton exchange membrane fuel cell, a methanol fuel cell, or a hydrogen-oxygen fuel cell, and the battery further includes a feed channel and a discharge channel connected to the flow field.