The invention provides a secondary battery battery battery battery core, which comprises an anode sheet, an anode ear, a cathode sheet, a cathode ear and an isolation film. The anode sheet includes: an anode collector; and an anode diaphragm. The cathode plate includes cathode collector and cathode diaphragm. The anode sheet is formed as follows: the anode ear receives grooves and the anode ear receives. The cathode plate is formed as follows: the cathode ear receives grooves and the cathode ear receives grooves. The two anode ears of each pair are arranged in pairs, and the two anode ears of each pair are located on the upper and lower sides of the starting section of the anode winding of the anode sheet along the thickness direction of the secondary battery battery battery battery cell, respectively; and/or the cathode ears of each pair are arranged in pairs, and the two cathode ears of each pair are located on the upper and lower sides of the starting section of the cathode winding of the secondary battery cell along the thickness direction of the secondary Thus, the deformation of the secondary battery core during the cyclic charging and discharging process is improved, the DC impedance is reduced, and the energy density of the secondary battery is increased.
【技术实现步骤摘要】
【国外来华专利技术】PCT国内申请，说明书已公开。
【技术保护点】
PCT国内申请，权利要求书已公开。
【技术特征摘要】
【国外来华专利技术】PCT国内申请，...
【专利技术属性】
技术研发人员：郭培培，何平，赵义，方宏新，程文强，
申请(专利权)人：宁德新能源科技有限公司，
类型：发明
国别省市：福建,35
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