Importance

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Abstract

A stacked secondary cell suppresses heat contraction of the opening of a sack-shaped separator even in a high-temperature environment and prevents the occurrence of short circuits between the stacked electrodes. In the disclosed stacked secondary cell, positive electrodes (13) and negative electrodes each having a lead-out terminal (2) are alternately stacked with interposed separators (15). Of positive electrodes (13) and negative electrodes, at least electrodes of one polarity are each housed in sack-shaped separator sacks (15) each formed by two sheet-shaped separators that are bonded together with an opening (3) in one portion. Further, the lead-out terminal (2) of the electrode (13) that is housed in the separator sack (15) protrudes through the opening (3) to the exterior of the separator sack (15), and the outer periphery of the opening (3) is covered by an electric insulating layer (8).

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First Claim