| 摘要 |
The invention relates to a charger for charging a battery and to a method for its operation. From the prior art, chargers with a charge-receiving mode for maintaining the battery voltage in a charged battery are known. The charge-receiving mode is characterized by two cyclically successive phases, a resting phase and a refreshing phase. During the resting phase, the battery discharges from an upper threshold voltage (U<SUB>OG</SUB>) to a lower threshold voltage (U<SUB>UG</SUB>). During the refreshing phase (A), the battery is charged again via a charge transformer ( 120 ) of the charger ( 100 ) from the lower to the upper threshold voltage. To minimize the power loss of the charger, it is proposed according to the invention that the charge transformer ( 120 ) in particular be switched off from the line voltage during the resting phase (R).
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