Composite foil and power battery

• Main Authors: WEI LIYONG, SONG WENFENG
• Format: Patent
• Language: Chinese; English
• Published: 15.02.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The utility model relates to the technical field of batteries, in particular to a composite foil and a power battery. The composite foil comprises: a skeleton; the outer surface of the framework is at least partially coated with the polymer film; and the metal coating covers the outer side of the polymer film. According to the composite foil material provided by the utility model, the polymer film and the metal coating are sequentially coated on the outer side of the framework, so that when the composite foil material is needled, the current on the composite foil material is increased, the polymer film is fused, an access formed by the composite foil material and a steel needle in a battery is changed into an open circuit, and the continuous reaction capability is cut off; therefore, the safety of the power battery can be improved when the battery pack is applied to the power battery. 本实用新型涉及电池技术领域，具体涉及一种复合箔材及动力电池。所述复合箔材包括：骨架；聚合物膜，至少部分的包覆于所述骨架外表面；金属镀层，覆盖于所述聚合物膜的外侧。本实用新型提供的复合箔材，通过在骨架外侧依序包覆聚合物膜与金属镀层，从而使得复合箔材在针刺