The utility model discloses a flat plate type
bus bar, which relates to the technical field of battery packs, and comprises an upper
insulation layer, a series connection aluminum bar plate and a lower
insulation layer, the series connection aluminum bar plate is fixedly installed at the bottom of the upper
insulation layer, the lower insulation layer is fixedly installed at the bottom of the series connection aluminum bar plate, and the series connection aluminum bar plate is composed of trapezoidal structure units. A gap of 1 mm is arranged between every two adjacent trapezoidal structure units, and the overall thickness of the series aluminum row plate is set to be 1 mm. According to the flat plate type
bus bar, the series aluminum bar plate is arranged to be formed by laying a plurality of trapezoidal structure units in a plane mode, so that the flat plate type
bus bar is more convenient to manufacture and lower in cost, discharging can be completed only through one set of module, compared with a traditional aluminum bar, the bending procedure is omitted, the production efficiency is greatly improved, the series aluminum bar plate adopts the trapezoidal structure of 1 mm, and the production cost is reduced. And the reliability of
laser welding is better, the vibration can be better absorbed, and the
welding of the
battery cell and the aluminum row is more convenient.