公开(公告)号：US20090317702A1

公开(公告)日：2009-12-24

申请号：US12376179

申请日：2007-09-27

申请人： Long He ,  Jianhua Tang ,  Xiaopeng Ma

发明人： Long He ,  Jianhua Tang ,  Xiaopeng Ma

IPC分类号： H01M2/18 ,  H01M4/58 ,  H01M2/02

CPC分类号： H01M10/0525 ,  H01M2/14 ,  H01M2/1686 ,  H01M2/18 ,  H01M10/0585

摘要： A stacked-type lithium ion battery, comprising a core, a battery shell, and a cover plate; said core is placed in the battery shell, said cover plate is coupled to the battery shell in a sealed manner; said core comprises a plurality of layers of positive plates, negative plates, and membranes that are stacked together with each other, and the membrane is between the positive plate and the negative plate; wherein at least two membranes are in a 5-175° included angle between their tensile directions. Since the tensile directions of the membranes are different, the overall tensile strengths of the battery in all tensile directions are essentially same; therefore, the phenomenon of short circuit in the battery resulted from membrane rupture in lower tensile strength directions can be prevented, and the battery safety performance is greatly enhanced.

摘要翻译： 一种叠层型锂离子电池，包括芯，电池壳和盖板; 所述芯体放置在电池壳体中，所述盖板以密封的方式联接到电池壳体; 所述芯包括彼此堆叠在一起的多个正极板，负极板和膜，并且膜位于正极板和负极板之间; 其中至少两个膜在它们的拉伸方向之间夹角5-175°。 由于膜的拉伸方向不同，电池在所有拉伸方向的整体拉伸强度基本相同; 因此，可以防止在较低拉伸强度方向上由于膜破裂导致的电池短路现象，并且电池安全性能大大提高。