Photovoltaic module bypass element soldering lug, bypass protection element module and junction box

The invention provides a photovoltaic module bypass protection element soldering lug. A bypass protection element comprises a copper plate frame and a bypass protection device, wherein a first conductive terminal of the copper plate frame is provided with a first welding region, a second conductive terminal of the copper plate frame is provided with a second welding region, the bypass protection device is fixed to the second welding region, the soldering lug comprises a first welding end welded to the first welding region, a second welding end welded to the bypass protection device and an arch-shaped connecting part located between the first welding end and the second welding end, and the arch-shaped connecting part is higher than the first welding end and the second welding end. The invention further provides a bypass protection element module adopting the soldering lug and a junction box with the bypass protection element module. The bypass protection device and the copper plate frame are welded to form ele