| 摘要 |
1,269,115. Charging batteries. MARATHON MFG. CO. 24 June, 1969 [7 Aug., 1968], No. 31861/69. Heading H2H. [Also in Division H1] A cell charging circuit 80 for high fast recharging of sealed Ni-Cd cells 13A, 13B, 13C, includes serially individual excess-pressure charge cut-off means 52-56, common excesstemperature charge cut-off means 71-74, which cut-off or reduce the charging current to leakage charge level in response to excessive pressure or temperature rise respectively in the cells, and leads which connect the cells in series. The charging current is delivered by a conventional rectified A.C. supply circuit including rectifier 87 and adjustment resistance 87-1 connected to cell input terminals 84, capacitor 88 which absorbs charge surges. Circuit leads each including resistance 86 are connected in shunt between cover terminal 31 of each cell and the circuit lead 85-1 of cell input terminal 84 to reduce the fast charging current to a lower leakage level when pressure switch 56 of any cell is opened. When the cell pressure drops the fast recharging current is restored. When the cell temperature reaches a certain maximum the temperature-deformed bimetal switch member 71 activates its switch 72 to open the circuit 80. Shunting resistance 77 connected across switch 72 reduces the charging current to leakage level. |
