The utility model discloses a battery becomes framing, including battery space bar, bottom plate, preceding riser, back riser and upper cover plate, the battery space bar is a square flat board, the bottom plate preceding riser back riser the upper cover plate respectively with the battery space bar is vertically T type structure, distribute in four sides of battery space bar, the terminal surface of upper cover plate is provided with from the inside sunken recess in border, the bottom plate with the upper cover plate is provided with concatenation groove and concatenation boss. The utility model discloses can freely change voltage and capacity that the free quantity of battery changes ganged battery module, increase the ganged convenience of battery, standardize battery information acquisition pencil moreover and arranged, simplify the packaging technology of battery module, be fit for the large -scale production, effectively reduce the manufacturing cost of battery system. In addition, the battery system that connects in groups has good heat dispersion.