A circuit connection method for a shingled component, the steps include: connecting each battery string through a
bus bar at the positive terminal and the negative terminal of the component respectively; connecting each battery string through a
bus bar at the position of each bypass
diode of the component; and then setting a lead wire group at the position of the middle axis of the component to connect the current in the component with the
peripheral device to form a loop current; the structure of the
bus bar used at the positive terminal and the bypass
diode position is different from that of the bus bar used at the negative terminal. The present invention is particularly suitable for double-glass solar shingled cells, at the positive terminal and the bypass
diode position, the width of the bus bar at the
welding point position is wider and the width at the non-
welding point position is narrower; the negative terminal adopts a foldable bus bar; it can not only reduce the risk of poor
welding, improve the welding stability and qualified rate of the component; but also reduce the
heat generation at the bus bar during power generation, effectively reduce
power loss, and improve the output power of the component; so that the proportion of power generation on the back of the component is increased by more than 5%.