New energy vehicle power source controllable heating piece

The invention discloses a new energy vehicle power source controllable heating piece which comprises a doughnut-shaped metal frame. The outer lateral side of the doughnut-shaped metal frame is vertically welded with a fixed connection block, a fixed through hole is formed in the middle of the fixed connection block and penetrates the upper and lower faces of the fixed connection block, rotating columns are connected between the inner side walls of the doughnut-shaped metal frame in an inserted manner and are in a left-right symmetric state on the inner side walls of the doughnut-shaped metal frame, metal conduction pieces are welded between one ends, away from the doughnut-shaped metal frame, of the rotating columns, a metal contact hole is formed in one end of the side face of each metalconduction piece and penetrates the upper surface of the corresponding metal conduction piece to extend to the inside, one end, extending to the inside of the corresponding metal conduction piece, ofeach metal contact hole is