| 摘要 |
A hermetically closed electrical storage battery cell with a metal salt containing electrolyte and with electrodes (1, 3 and 2) of the first order is provided with an expansion chamber (10, 11) with a compressible gas cushion (10), which can be open or closed (30). The expansion chamber (10, 11) is separated from the electrolyte-filled electrode space of the cell, but connectible with different zones of that space through oppositely directed one-way valve elements (5, 7). When the volume of the electrolyte expands during charge, electrolyte is displaced from the electrolyte-filled space into the expansion chamber (10, 11), and when the volume of the electrolyte is decreased during discharge, electrolyte is displaced from the expansion chamber (10, 11) into a different zone of the electrolyte-filled space. Hereby a step-wise circulation movement of the electrolyte is established, which counteracts the building-up of concentration differences in the electrolyte during charge and discharge. In a storage battery cell with horizontal electrodes and with the anode uppermost the one-way valve elements (5, 7) are so disposed and directed that the displacement of electrolyte takes place from the electrolyte-filled space to the expansion chamber (10, 11) adjacent the anode (1, 3) during charge, and from the expansion chamber (10, 11) to the electrolyte-filled space adjacent the cathode (2) during discharge. Instead of a single expansion chamber, a plurality of expansion chambers, distributed over the electrode area, may be used. A storage battery can be built up from a plurality of horizontally disposed cells, which are stacked on top of one another with a common cell closure (82) between each two successive cells. |
