Based on the principle of electrochemistry, brown gas generator (oxyhydrogen generator), a special equipment, decomposes water into a mixture of hydrogen and oxygen. After the gas is ignited by a special welding gun, it can burn paint and weld the motor leads (> 500mm2) of different square numbers. This welding scheme effectively avoids the false welding and small welding square numbers (< 4mm2) caused by resistance welding and tin welding ）Disadvantages of high welding cost (64% less than acetylene and 32% less than propane)