| 摘要 |
<p>A sodium sulphur battery formed of a plurality of modules each containing a cell or cells (10-13,50) has a passage (25,52) through each module for a heating and/or cooling fluid. Between the outer casing (14,51) and the cells is an evacuated region containing radiation-inhibiting means (33, 53) e.g. metal foil or metal foil with ceramic paper. Thermostatically controlled valve means (55) are provided for controlling the flow of fluid through the passage (25, 52) which valve means is open at temperatures above a predetermined temperature, e.g. 370 DEG C. for passage of a coolant fluid and is also open at temperatures below another predetermined temperature, e.g. 300 DEG C. for passage of a heating fluid. The valve is preferably gradually closed and opened between these temperatures. Each valve is controlled in accordance with the temperature of the associated module.</p> |
