Square battery shell and square battery adopting same

A square battery shell and a square battery adopting the same belong to the field of battery shells, the square battery shell is simple in structure, the production process is simplified by adopting a structure of welding an upper cover plate and a lower cover plate, meanwhile, the mounting steps are reduced, and the manufacturing cost is low; the plurality of liquid injection holes shorten the standing time of the current collector in the liquid injection process and improve the liquid injection efficiency; the opposite positions of the liquid injection holes can improve the liquid absorption speed of the pole piece, so that the infiltration degree of the pole piece is improved, and the cycle performance is improved; the structure realizes double-pole charging and discharging, reduces the internal resistance, shortens the charging and discharging time, and improves the working efficiency. 一种方形电池壳体及采用其的方形电池，属于电池壳体的领域，本实用新型结构简单，采用上、下盖板焊接的结构使生产工艺简化，同时减少安装步骤且制造成本低；多个注液孔使注液工序的集流体在静置的时间缩短，提升注液效率；且注液孔的位置相对设置能够提升极片吸