The full name of BC cell is back contact cell, and its basic type is IBC cell (interdigitated back contact cell). The biggest difference from other crystalline silicon cell routes is that the emitter, surface field and metal electrodes are all made on the back of the cell and distributed in an interdigitated manner. There is no grid line blocking the front surface of the cell, which maximizes the use of incident light, reduces optical losses, brings more effective power generation area, has high conversion efficiency, and is more beautiful in appearance. IBC cells, also known as cross-back contact cells, transfer all the electrode grid lines on the front of the cell to the back of the cell. The PN junction and metal contact are both on the back of the cell and arranged in a forked finger manner, thereby reducing the shielding of the cell grid lines to sunlight and improving the cell conversion efficiency. Strictly speaking, BC battery is a battery manufacturing technology that is optimized in structure, not a separate type of battery cell. Both P-type and N-type batteries can be stacked. BC Battery Technology , making new battery cells. The battery with P-type battery superimposed on BC technology is PBC. The battery with TOPCon superimposed on BC technology is TBC. The battery with HJT superimposed on BC technology is HBC. At present, the main technical routes include IBC, HBC, PBC, ABC, HPBC and other technical routes. Among them, the HPBC route of Longi Green Energy has an electrode arrangement that is visually a straight line; Zhonglai shares also have relevant technical reserves for BC, and the main IBC technical route is cross arrangement. In addition, there are ABC, TBC and other technical routes. Overall, BC battery technology is diverse and is the most differentiated route in N-type battery technology.
