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).
The testing of various battery cells and their performance under different charging and discharging conditions.
| Identifier | WestWitteringFiles\N\2October1925-December1925\ Scan217 | |
| Date | 30th November 1925 | |
| EFC1/T30.11.25. -6- Contd. Further batteries that will be made up out of the various cells available are SU, SV and SW, each of which will contain, arranged in different ways 1 Exide cell 1 P & R " 2 Oldham cells 2 Fuller " These sandwich batteries will be subjected to series of charges and discharges, to dynamo tests, and to chassis service, and periodically high and low rate discharge capacity tests will be taken, the relative P.D's on the various cells being noted, both on charge and high and low rate discharge, so that the relative functioning of the various makes of cells will be known. In connection with certain cases of charging on New PhantomCodename for PHANTOM I chassis taking place at too high a rate, more consideration has been given to the internal charging resistances of batteries and of cells, as deduced from the terminal P.D's of the cells when on charge. For cells in general (i.e. of any make) it appears that the actual internal resistance may be many times more on charge than on discharge (low or high rate). This is considered to be due to quantities of gas. An illustration of this is provided in some of the high rate discharge curves, especially when taken immediately after charge. During the first few moments after switching on, the output of Contd. | ||