Secondary battery

• Main Authors: RAO XIANHUI, QU YANGLU
• Format: Patent
• Language: Chinese; English
• Published: 23.07.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The utility model discloses a secondary battery. The secondary battery comprises at least one naked battery cell, the naked battery cell comprises a first pole piece, a second pole piece and a diaphragm, and the first pole piece, the diaphragm and the second pole piece are laminated and then wound to form the naked battery cell; the first pole piece and/or the second pole piece comprises a current collector and an active material layer; wherein the current collector comprises a body, and the active material layer is arranged on the surface of at least one side of the body; the current collector of the first pole piece further comprises or is connected with a plurality of first tabs; the first tab comprises a combination section which is used for being combined with other first tabs to form a combination part; the connecting section is arranged between the combining section and the body to connect the combining section to the body; the sum of the lengths of the combination section and the connection section is