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).
Battery design, performance, and material degradation, with a focus on P&R batteries.
| Identifier | ExFiles\Box 54\5\ Scan051 | |
| Date | 15th January 1926 | |
| Contd. -2- EFC7/T15.1.26. hand, if the ribbed surface faces the plates the active material can fall away more easily. It appears to us that the great thing that is wanted in batteries now is to find some satisfactory method of preventing the active material from falling off the positive plate. Batteries which do not otherwise fall, fail eventually in this manner through loss of capacity due to loss of paste. At the same time we can say in the present P & R batteries where the perforated ebonite rests against the positive plate, the loss of active material does not seem to be serious, and a recent result is of interest, viz., that a special experimental P & R battery which we received over two years ago and which has done 21,000 miles on a car, has a capacity at least as good as at the beginning, and also quite a fair high rate performance. Similar batteries received at the same time in some of the cells of which there were no ebonite separators in addition to wood have failed some time back. EFC. MADE AT CROXLEY | ||