Patent ID: 9077017
Filing Date: 2015-07-07
Classification: H01M,Y02E,Y02P

Abstract:
1. A prismatic cell comprising: a prismatic cell case; and a flat electrode insertion unit housed in the cell case, the electrode insertion unit including: a center portion of the electrode unit in a specific direction as viewed from a wide face thereof forms an active material layer provision component laminated at a portion where the positive electrode active material layer is provided and a portion where the negative electrode active material layer is provided, one end, of two ends of the electrode unit in the specific direction, forms a positive electrode collection component laminated at a portion where no positive electrode active material layer is provided and where a positive electrode collector is exposed, and the other end forms a negative electrode collection component laminated a portion where no negative electrode active material layer is provided and where a negative electrode collector is exposed, the electrode insertion unit is housed, from an opening formed at an upper end of the cell case, in the cell case in a lateral direction in which the positive electrode collection component and the negative electrode collection component are disposed along from the upper end to the bottom at both ends of a wide face of the cell case, a thickness of the electrode insertion unit at both ends in the lateral direction gradually decreases from the upper end to the bottom of the cell case along the entire width of the electrode insertion unit, the positive electrode collection component is disposed at a first end of the wide face of the cell case, and has a first thickness gradually decreasing from the upper end toward the bottom of the cell case, and the negative electrode collection component is disposed at a second end of the wide face of the cell case opposite the first end, and has a second thickness gradually decreasing from the upper end toward the bottom of the cell case.