| 摘要 |
In the event of failure of a charging apparatus (3) which is connected to a power supply network, or in the event of failure of the power supply apparatus, in order to prevent a master battery (2) voltage or, respectively the voltage which is applied to the load, supplied from the master battery (2), of a load circuit (1) being reduced in an unacceptable manner, an additional battery (5) is provided to which a DC converter (4) which can be controlled and/or regulated is connected and whose output is connected in series with the load of the load circuit (1) and the master battery (2). <IMAGE>
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