SECONDARY BATTERY AND ELECTRONIC DEVICE

The secondary battery comprises an electrode assembly and a first bonding piece, and the electrode assembly comprises a first isolating membrane, a positive plate, a second isolating membrane and a negative plate which are sequentially stacked and wound; the positive plate comprises a first single-sided blank section and a first double-sided blank section, the first single-sided blank section is located on the secondary outer ring of the electrode assembly, and the first double-sided blank section is located on the outermost ring of the electrode assembly; the first isolating membrane comprises a first layer membrane; the first layer membrane is positioned between the first single-sided blank section and the first double-sided blank section; the negative plate comprises a first double-sided coating section, the first double-sided coating section and the first single-sided blank section are stacked in the first direction, and the first double-sided coating section is closer to the winding center of the electro