| 摘要 |
PCT No. PCT/SE85/00359 Sec. 371 Date May 6, 1986 Sec. 102(e) Date May 6, 1986 PCT Filed Sep. 19, 1985 PCT Pub. No. WO86/01948 PCT Pub. Date Mar. 27, 1986.The present invention relates to a method for the cyclical trickle charging of a chargeable battery intended for emergency operation. The charging voltage used for this purpose is the output voltage from a source of d.c. voltage providing a variable level of output voltage. A characteristic feature of the invention is the fact that charging from a starting mode (1) is executed in accordance with a cyclical charging program (10) which is repeated until the battery has been found to be fully charged. A rest mode (13) then occurs during which the battery is not charged, but the battery voltage is measured continuously. The rest mode (13) is interrupted immediately, and the aforementioned charging program (10) is re-started if it is noted in the course of measuring the voltage that the battery voltage has dropped below a first pre-determined value. Once the rest mode (13) has lasted for a pre-determined period, a discharging phase (17) will be initiated which involves the battery being discharged in accordance with a discharging program during which the battery voltage is measured continuously. The discharging phase (17) is interrupted if it is noted in the course of measuring the voltage that the battery voltage has dropped below a second pre-determined value. Once the discharging phase (17) has been interrupted or completed, the charging program (10) is re-started. |
