| 摘要 |
<p>A power supply comprises chargeable/dischargeable first and second batteries (BA, BB); a load circuit (23); a first step-up converter (12A) for converting the voltage between a first node (N1) to which the first battery (BA) is connected and a second node (N2) to which the load circuit (23) is connected; a second step-up converter (12B) for converting the voltage between a third node (N3) to which the second battery (BB) is connected and the second node (N2); and a charge/discharge unit (40) for transmitting power received from an external power supply to the first node (N1). Preferably, the power supply further comprises a controller (30) for controlling a first system main relay (SMR2A), a second system main relay (SMR2B), the first and second system main relays (SMR2A, SMR2B), and the first and second step-up converters (12A, 12B).</p> |
