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发明公开
CN102470770A 电动车辆的电源系统 有权

电动车辆的电源系统
摘要：
外部充电用的PLG-ECU(82)构成为：与车辆行驶用的HC-ECU(80)分别设置，也能够控制外部充电继电器RL1、RL2的接通断开。进而，在外部充电时将充电器(10)的输出电压变换为辅机系统电压(Vs)的副DC/DC转换器(115)，与车辆行驶时使用的大容量的主DC/DC转换器(60)分别设置。在外部充电时，不启动车辆行驶系统，能够由PLG-ECU(82)执行外部充电，并且能够由副DC/DC转换器(115)产生辅机系统电压(Vs)。进而，将系统主继电器SMR1、SMR2维持为断开而执行外部充电，因此不会对后端的构成设备施加高电压(主电池的输出电压)。其结果，能够不对车辆行驶系统的构成部件的耐久性和寿命产生影响地对主电池(10)进行外部充电。
摘要（英）：

A PLG-ECU (82) for use in an external charging is provided independently of an HV-ECU (80) for use in a vehicle driving and is adapted to control the on/off states of external charging relays (RL1, RL2). A subsidiary DC/DC converter (115), which is used to convert an output voltage of a charger (110) to an auxiliary machinery system voltage (Vs) during the external charging, is also provided independently of a main DC/DC converter (60) of a large capacity that is used during the vehicle driving. During the external charging, the PLG-ECU (82) is used to execute the external charging, while the subsidiary DC/DC converter (115) is used to generate the auxiliary machinery system voltage (Vs), without activating a vehicle driving system. Moreover, the external charging can be executed with system main relays (SMR1, SMR2) kept off, so that no high voltage (or no main battery output voltage) is applied to equipment in the following stages. As a result, a main battery (10) can be externally charged without affecting the endurances or lives of the components of the vehicle driving system.

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