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 cell failure, its effect on charging, and voltage regulator performance.
| Identifier | ExFiles\Box 58\4\ Scan139 | |
| Date | 25th September 1933 guessed | |
| -2- Referring to your third paragraph we should not expect the changes of the ohmic resistance of the battery to seriously affect the performance of the regulator. For instance supposing one cell failed (short circuited) the regulator would permit a higher charging current, to flow but owing to the fact that the regulator is also series wound this current flow would not be excessive. We do not believe that cells normally get internally shorted to the extent that they do not respond to a charge and put up an E.M.F. If the cells became sulphated it would simple mean that the battery would receive slightly less charge due to the rise in internal resistance raising the cell E.M.F. on charge. Actually however our voltage regulator does not regulate on voltage until the battery attains practically 16 volts. Perhaps you would like to discuss these regulator and the effects of the battery on their performance with us here as we think it would be of mutual advantage to us both. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||