| 摘要 |
<p>A battery has a wrapper member comprising the combination of an inner layer which is pervious to gases generated by the cell and an outer layer which is impervious to liquids and which is less pervious than the inner layer to the gases generated by the cell. The inner and outer layers are laminated to one another throughout some but not all of their coextensive surfaces, with the unlaminated portions providing a passageway between the two layers for the venting of gases generated on the interior of the battery; the passageway communicates with the exterior of the battery. Preferably the inner and outer layers have coextensive surfaces which cover the entire area enclosed by the peripheral seal of the battery, and the inner layer extends into the area of and forms a component of the peripheral seal; in that case the gas passageway may extend to the area above the seal. Preferably the inner layer is an electrically conductive plastic and the outer layer is a metal.</p> |
