| 摘要 |
The charging device contains a two-part conductor bar (18', 18''), the two parts of which can be connected by means of a contact pair (32). When the contact pair is closed, the conductor bar connects a connecting terminal (15) for the accumulator battery (16) to be charged with the primary winding of a firing transformer (37) and with a device (33, 34, 36) for energizing the firing transformer as a function of the voltage of the battery. When the contact pair is opened, the primary winding of the firing transformer and the aforementioned device are separated from the connecting terminal. In addition a control circuit (31) for the contact pair is provided, which receives a first input signal from a timer (26) and a second input signal from a series resistor (12) in the charging circuit. The control circuit contains means which close the contact pair during the period determined by the timer, so that the firing transformer is energized as a function of the voltage of the battery, and open the contact pair after expiry of the predetermined period as soon as the charging current exceeds a presettable value. In this manner it is possible to charge a battery and/or to maintain a limited maintaining charge during a period of any desired length and to interrupt the charging operation when a battery does not reach the set-point of its voltage in the predetermined period.
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