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).
Instructions on battery care, including storage, running conditions, and preventing sulphation.
| Identifier | ExFiles\Box 26\2\ Scan098 | |
| Date | 6th August 1919 | |
| -25- Contd. R R 938 a (100) T (O F 826 6-8-19) G 2460 6. If the battery is to be stores, place in a dark, cool place. 7. When the battery is to be put into commission again it should preferably be treated in the same way as a new battery. (See page ) Care of Battery under Running Condition. Under running conditions a battery must never be allowed to continue discharging when the voltage of any cell has fallen below 1.8 (except momentarily for the purpose of teacing a faulty cell as described on page ). Such a discharge may occur if there is an earth or leak in the wiring system or if the ignition switch be left on in error and the primary platinum contacts happen to be in contact. Always, when leaving the car, notice that the ammeter does not show any discharge, current. Such a discharge allow the plates of the battery to sulphate and is very injurious, in so far as the process of removing the sulphate is tedious, even for a small amount, and impossible when the sulphating has been allowed to proceed too far. The sulphate is formed from the lead in the plates and The sulpharic acid in the solution. A battery will sulphate itself up in a similar manner if left for any length of time in a run-down condition. Therefore, in storing a battery for a long period it is necessary to remove the acid as explained above. Under these circumstances it is impossible for sulphate to be formed because of one of the components of this sulphate has been removed. The battery, therefore, can be allowed to discharge to a dead condition without injury when the acid is replaced by distilled water. Contd | ||