| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electrochemical device reducing material cost, causing no self-discharge failure, and having low DC resistance. <P>SOLUTION: The electrochemical device includes: an electrochemical element using a metal foil as a collector of a positive electrode plate and a negative electrode plate and including the positive electrode plate and the negative electrode plate laminated via a separator as well as electrolyte; a positive external terminal plate 2 and a negative external terminal plate 3 electrically connected to the positive electrode plate and the negative electrode plate, respectively; and an outer film sheet 4 incorporating the electrochemical element and sealing at its periphery, wherein each of a positive electrode active material electrode sheet and a negative electrode active material electrode sheet has at least one through hole, and an opening ratio to an area of the positive electrode plate and the negative electrode plate is 0.1-10%. <P>COPYRIGHT: (C)2011,JPO&INPIT |
