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).
Test record comparing two multiple storage batteries against two new Willard batteries.
Identifier | ExFiles\Box 41\2\ Scan093 | |
Date | 11th March 1918 guessed | |
Sheet #1 TEST RECORD OF TWO MULTIPLE STORAGE BATTERIES AGAINST TWO NEW WILLARD BATTERIES. Multiple battery #5445 will be known as number three, and the other Multiple as number four, (we cannot furnish serial number on number four due to the fact that we were obliged to tear down the old box and replace it in a new one, destroying the old box with out preserving the number plate). The Multiple storage batteries were furnished us at the request of Mr. Hardy and found to be discharged and empty of electrolyte. They were torn down and found to be in the following condition: Plates were slightly buckled. Separators were in good condition with the exception of a few broken ones which were in their proper places but necessarily had to be replaced on rebuilding. After Mr. Hardy had left, further examination was made and it was found that each battery had two cracked cells. This no doubt was the cause of their failure to function. In tearing down number four battery it was found that the cells were stuck so tight to the box that it was necessary to tear this box apart in order to save the cells. After rebuilding, both batteries were filled with electrolyte and put on charge at 12 amper hour rate for one hour on the eight and nineth hours at 18 amp. rate on the 10th. This run was sufficient to overcharge the batteries. They were then sealed up and put on 15 amp. hr. discharge: then recharged and put on the following test. The test consisted of connecting these batteries in series with two Willard batteries ordered from factory stock, discharging them at 15 amp. hr. rate for 3 hours and then recharging them for enough hours at 4 amp hour rate until all batteries were gassing freely and showed 1285 on the hydrometer. Batteries were then put on charge at 8 amperes and each one in turn discharged by turning over Model "F" motor for 15 seconds at 10 minute intervals according to the following chart. | ||