From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Using a cadmium electrode for testing accumulator element condition.
| Identifier | WestWitteringFiles\O\2April1926-June1926\ Scan049 | |
| Date | 26th April 1926 | |
| ORIGINAL EFC1/T26.4.26. Expl. Report. To R.{Sir Henry Royce} from EFC. c. BJ. E.{Mr Elliott - Chief Engineer} c. Da.{Bernard Day - Chassis Design} Wor.{Arthur Wormald - General Works Manager} c. By.{R.W. Bailey - Chief Engineer} PN.{Mr Northey} X.4049 - CADMIUM ELECTRODE FOR TESTING ACCUMULATOR ELEMENT CONDITION. In this connection we re-issue for convenience pp.3 and 4 of report on Accumulator Element Condition, EFC2/T16.9.25. In addition to the above, the following may now be reported. Cells which have been in normal use and received correct treatment usually show positive weakness when discharged at normal (10 hour) rate. Cells which are old and have lost a lot of positive active material through the accumulated effect of reasonable charging also show positive weakness. Any cell which has stood for any length of time with the electrolyte low or received bad treatment in any other way, undercharging particularly, shows negative weakness, due to poor capacity resulting from oxidation of the negative plates. When cells are discharged at a high rate they usually show negative weakness even if they show positive weakness when discharged at a normal rate. This means that the negative plates cannot stand up to a high rate of discharge as well as the positives. According to whether the positive or negative surfaces are not so "get-at-able" by the electrolyte due to the presence of the flat surfaces of separators against Contd. | ||