Abstract: A method for manufacturing a battery comprises winding a separator to a winding core, and forming an area in which the separator is overlapped in equal to or more than two layers of the separator, joining the two layers mutually in pressure contact by pressing a projecting portion formed in a jig to the overlapped area, after the step of the joining, providing a positive electrode plate and a negative electrode plate to the winding core, and winding into a spiral form the positive electrode plate and the negative electrode plate interposing the separator therebetween, and after the step of the winding, forming a spiral electrode assembly by removing the winding core from a winding body wound into the spiral form.

Abstract: The present invention aims to provide a method for bonding protective tapes to the cut edges of an electrode plate within a short period to prevent short circuit in an electrode assembly. An electrode plate cutting & tape bonding process includes (1) cutting an electrode plate into pieces 100a and 100b, (2) forming a gap W between edges 106 and 107 of the pieces 100a and 100b, (3) bonding protective tapes 51 and 52 to both sides of the pieces 100a and 100b, covering the edges and the gap, and (4) conveying the pieces 100a and 100b connected together. Next, the tapes 51 and 52 are cut into pieces 51a & 52a and 51b & 52b. Then, the electrode plate piece 100a with the tape pieces 51a & 52a and 51b & 52b is wound together with a negative electrode plate, with a separator sandwiched therebetween.

Abstract: The present invention aims to provide a method for bonding protective tapes to the cut edges of an electrode plate within a short period to prevent short circuit in an electrode assembly. An electrode plate cutting & tape bonding process includes (1) cutting an electrode plate into pieces 100a and 100b, (2) forming a gap W between edges 106 and 107 of the pieces 100a and 100b, (3) bonding protective tapes 51 and 52 to both sides of the pieces 100a and 100b, covering the edges and the gap, and (4) conveying the pieces 100a and 100b connected together. Next, the tapes 51 and 52 are cut into pieces 51a & 52a and 51b & 52b. Then, the electrode plate piece 100a with the tape pieces 51a & 52a and 51b & 52b is wound together with a negative electrode plate, with a separator sandwiched therebetween.

Abstract: The present invention aims to provide a method for bonding protective tapes to the cut edges of an electrode plate within a short period to prevent short circuit in an electrode assembly. An electrode plate cutting & tape bonding process includes (1) cutting an electrode plate into pieces 100a and 100b, (2) forming a gap W between edges 106 and 107 of the pieces 100a and 100b, (3) bonding protective tapes 51 and 52 to both sides of the pieces 100a and 100b, covering the edges and the gap, and (4) conveying the pieces 100a and 100b connected together. Next, the tapes 51 and 52 are cut into pieces 51a & 52a and 51b & 52b. Then, the electrode plate piece 100a with the tape pieces 51a & 52a and 51b & 52b is wound together with a negative electrode plate, with a separator sandwiched therebetween.