Coiled flexible package lithium ion battery

• Main Authors: LIU ZHIWEI, ZHONG QIANLI, SUN YINGXIN
• Format: Patent
• Language: Chinese; English
• Published: 16.03.2011
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The utility model discloses a coiled flexible package lithium ion battery, including a battery core coiled by pole pieces welded with tab-leads, and a flexible package casing holding the battery core; and tab-leads for enabling to form a parallel connection structure inside the whole battery core are additionally separated from a tail foil part of the pole piece; and tab-leads are respectively arranged on two ends of the battery core; the flexible package casing for holding the battery core is equipped with edge sealing on two ends and a side edge of the battery core; and the flexible package casing is an aluminum-plastic membrane. Separated tab-leads structure plays a role of shunting a heavy current and reducing internal resistance of the battery core so that a narrow square coiled flexible package lithium ion battery can bear a discharge current over 20C and once more current density than the conventional structure, decrease polarization inside the battery core, increase high-magnification discharge and en