Pole piece structure and secondary battery

The invention belongs to the technical field of secondary batteries, and particularly relates to a pole piece structure and a secondary battery, the pole piece structure comprises a current collector and an insulation protective coating arranged on at least one surface of the current collector, and the melting point of the insulation protective coating is 120-180 DEG C. According to the pole piece structure disclosed by the invention, the insulation protection layer in the battery cell can be heated and melted to protect the pole piece and the battery cell under the condition of short circuit of the battery cell caused by needling or heavy object impact, so that further short circuit is avoided, and the damage to the battery cell is reduced. 本发明属于二次电池技术领域，尤其涉及一种极片结构以及二次电池，包括集流体以及设置在集流体至少一表面的绝缘保护涂层，所述绝缘保护涂层的熔点在120℃-180℃。本发明的一种极片结构能够在针刺或重物冲击导致电芯短路的情况下，电芯内的绝缘保护层受热熔融保护极片以及电芯，避免进一步短路，减少电芯的损伤。