Manufacturing method of back-contacted solar cell bunches

The invention discloses a manufacturing method of the back-contacted solar cell bunches. A plurality of battery pieces are welded into a bunch through a net made of straight solder strips. Positive and negative electrodes of the battery pieces are in linear arrangement and are spaced apart. The distances of any two adjacent rows of positive and negative electrodes are the same, and electrode patterns of the adjacent battery pieces are the same. Opposite electrodes of the adjacent battery pieces are welded on the same solder strip without rotating the battery pieces. After the battery pieces are welded, solder strips of odd number or even number between the adjacent battery pieces are cut off, so that the adjacent battery pieces are connected in series. The manufacturing method of the back-contacted solar cell bunches has the advantages that welding is rapid, precision is high, number of solder strips is increased greatly, and quantity of battery piece electrodes is increased accordingly. Further, density of e