A power supply control circuit allows power to be supplied to a load from a power supply, such as a sub-battery, for a longer period of time in a case where a main power supply fails. A power supply control circuit (1) is provided with: a first circuit (2) that connects a main battery (52) and a sub-battery (53) via a DC/DC converter (20); a second circuit (3) that connects the main battery (52) and the load (54); and a third circuit (4) that connects the sub-battery (53) and the load (54) via the semiconductor switch (32). When a failure occurs in the main battery (52), the semiconductor switch (32) is turned on to supply power from the sub-battery (53) to the load (54), and a forward direction of a parasitic diode (32a) of the semiconductor switch (32) is a direction from the load (54) to the sub-battery (53). In addition, the DC/DC converter (20) boosts the voltage from the main battery (53), and supplies the boosted voltage to the sub battery (53).
一种电源控制电路,在主电源发生故障的情况下,该电源控制电路允许在更长的时间周期内从诸如副电池的电源向负载供应电力。电源控制电路(1)包括:第一电路(2),其经由DC/DC转换器(20)连接主电池(52)和副电池(53);第二电路(3),其连接主电池(52)和负载(54);以及第三电路(4),其经由半导体开关(32)连接副电池(53)和负载(54)。当主电池(52)发生故障时,半导体开关(32)接通以从副电池(53)向负载(54)供应电力,并且半导体开关(32)的寄生二极管(32a)的正向是从负载(54)向副电池(53)的方向。此外,DC/DC转换器(20)对来自主电池(53)的电压进行升压,并将升压后的电压供应至副电池(53)。
Power supply control circuit
电源控制电路
27.12.2024
Patent
Elektronische Ressource
Chinesisch
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR |