Tab structure, tab assembly, battery cell and secondary battery

• Main Author: GE YONGJUN
• Format: Patent
• Language: Chinese; English
• Published: 08.02.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to the technical field of batteries, and discloses a tab structure, a tab assembly, a battery cell and a secondary battery. According to the present invention, the tab structure comprises the outer tab and the inner tab group, the inner tab group comprises the plurality of inner tabs, the inner tabs are sheet-shaped, one ends of the inner tabs are overlapped with each other and are fixedly connected with the outer tab, and each inner tab is provided with the at least one telescopic region along the length direction, such that the safety and the reliability of the battery tab are improved, and the cost is reduced. 本申请涉及电池技术领域，公开了一种极耳结构、极耳组件、电芯及二次电池。本申请中极耳结构包括外极耳和内极耳组，内极耳组包括多个内极耳，内极耳呈片状且各内极耳的一端彼此叠置与外极耳固定连接，并且各内极耳沿长度方向设有至少一个可伸缩区，本申请提高了电池极耳的安全性和可靠性，降低了成本。