Abstract: The disclosure includes a laser soldering method of connecting crystalline silicon solar batteries. Methods can include placing conductive soldering strips and crystalline silicon solar batteries on a lower press plate and aligning the conductive soldering strips on metal electrodes of crystalline silicon solar batteries. Methods can also include placing an upper press plate on the conductive soldering strips and the crystalline silicon solar batteries and vacuuming between the upper and lower press plates such that absolute pressure between the upper and lower press plates is less than atmospheric pressure. Methods can also include laser soldering the conductive soldering strips and the crystalline silicon solar batteries.