Square aluminum hull lithium ion battery of high energy density

The utility model relates to a lithium battery technology field especially relates to a square aluminum hull lithium ion battery of high energy density, include: two coiling directions are mirror image and parallelly connected book core, each it forms one by negative pole piece, positive plate and single face ceramic diaphragm coiling to roll up the core roll up core final phase of a project department the positive plate compares the negative pole length of a film, another roll up core final phase of a project department the negative pole piece compares anodal length of a film. The utility model discloses increased by the two parallelly connected contact surfaces of rolling up the positive and negative pole piece of core to the capacity of positive plate on the full play contact surface reaches the purpose that increases whole monomer electricity core energy density, provides better basis for constituteing the pack module. 本实用新型涉及锂电池技术领域，尤其涉及种高能量密度方形铝壳锂离子电池，包括：两个卷绕方向呈镜像且并联的卷芯，每所述卷芯均由负极片、正极片和单面陶瓷隔膜卷绕而成，所述卷芯收尾处