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    • 4. 发明申请
    • WOUND ELECTROCHEMICAL DEVICE AND METHOD OF MANUFACTURING SAME
    • 电气化学装置及其制造方法
    • US20090169993A1
    • 2009-07-02
    • US12332031
    • 2008-12-10
    • Yoshihiko OHASHIMitsuo KOUGOKiyonori HINOKIKazuo KATAI
    • Yoshihiko OHASHIMitsuo KOUGOKiyonori HINOKIKazuo KATAI
    • H01M6/00H01M4/02
    • H01M10/0431H01G9/151H01M10/0587
    • A wound electrochemical device has a wound body formed by winding a multilayer member including a multilayer structure composed of a positive electrode, a separator, and a negative electrode; wherein each of the positive and negative electrodes, includes a structure having an active material layer formed on both sides of a current collector; wherein the wound body has a space at a center portion thereof; and wherein the smallest radius of curvature R of a curved part in an innermost circumferential portion of the wound body satisfies the following expression (1): R=α×(T1+2T2)  (1) where R is the smallest radius of curvature of the curved part in the innermost circumferential portion of the wound body (unit: μm), α is a value within the range of 3.33 to 7.12, T1 is a thickness of the current collector of the electrode positioned at the innermost circumference of the wound body (unit: μm), and T2 is a thickness of the active material layer of the electrode positioned at the innermost circumference of the wound body (unit: μm), T2 being a value within the range of 8 to 30 (unit: μm).
    • 卷绕电化学装置具有通过卷绕包括由正极,隔膜和负极构成的多层结构的多层构件而形成的卷绕体; 其特征在于,所述正极和负极各自包括在集电体的两面形成有活性物质层的结构体。 其中所述卷绕体在其中心部分具有空间; 并且其中卷绕体的最内圆周部分中的弯曲部分的最小曲率半径R满足以下表达式(1):<?in-line-formula description =“In-line formula”end =“lead”? > R = alphax(T1 + 2T2)(1)<?in-line-formula description =“In-line Formulas”end =“tail”?>其中R是最内圆周中弯曲部分的最小曲率半径 伤口体的一部分(单位:mum),α是3.33〜7.12的范围内的值,T1是位于伤口体的最内周的电极的集电体的厚度(单位:mum), T2是位于卷绕体的最内周的电极的活性物质层的厚度(单位:mum),T2是8〜30(单位:mum)的范围内的值。