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).
Performance comparisons and specifications of various automotive batteries, including Ni-Fe and Alklum types.
| Identifier | WestWitteringFiles\L\2April1924-June1924\ Scan74 | |
| Date | 15th May 1924 | |
| Contd. -3- EFC1/T15.5.24. On the second high rate discharge through #.100 ohms the result was practically identical with the first, and on the accompanying photostat of high rate discharge curves will be found one curve labelled as an average curve of these two. On this sheet of curves there are given for comparison, in addition to the results for the Alklum batteries recorded below, representative results for the two batteries, namely P & R TBD11 and Exide 6BXRE5 which are at present standard, together with the best result in this direction we have ever had for any battery, namely that of the Fuller Sparta, of 103½ lbs. weight; also one for a Lithanode battery which is somewhat poor - probably owing to not yet being properly in form. A horizontal line is drawn at 104 amperes, with a x representative of a period of 6 minutes, above which x this curve must lie to comply with our specification for battery for 40/50 car. Thus our present standard P & R complies with this, but not our present standard Exide since the inclusion of the perforated ebonite in addition wo wood separators. The overall dimensions of this Ni-Fe battery are 11" high x 7.5" x 21.250", and weight as already mentioned 122 lbs. It will be seen that as regards cranking ability this is about equal to the standard Exide of 82 lbs. and in comparison with the others of the alkaline variety is better in this respect. Unlike the previous Ni-Fe battery described in our EFC3/T6.10.20, the shape of the new battery is orthodox, the 10 cells being arranged in order crossways. Alklum 60 ampere-hour Battery. This battery is similar in arrangement and appearance to the former Ni-Fe battery, the details of which were reported in our EFC3/T6.10.20, the battery consisting of two rows of 5 cells each, arranged in partitions in a wooden box, the cells being supported and spaced by porcelain insulators, and secured vertically by metal tie rods. The battery was received by us in a charged condition on 13.9.23 and was put through our routine bench tests. Contd. | ||