Vehicle power supply system with redundancy and method for controlling power supply system

A power supply system (100) for a vehicle, the system comprising: a battery pack (102) comprising at least two parallel strings of battery cells, each string forming a battery (104a-b) having a firstoutput voltage; a switch mechanism (106, 108) configured to connect one of the at least two batteries to a first battery pack output terminal (110), wherein the first battery pack output terminal is connected to a first power consumer (112); and a multichannel DC/DC converter (114) having an input terminal (116) connected to the first battery pack output terminal, the multichannel DC/DC convertercomprising a plurality of outputs (118a-d), wherein at least one of the plurality of outputs is configured to provide a second voltage, the second voltage being lower than the first voltage, and wherein the at least one output of the multichannel DC/DC converter is connected to a second power consumer (120, 122). 一种用于车辆的供电系统(100)，该系统包括：电池组(102)，包括至少两个并联的电池单元串，每个串形成具有第一输出电压的电池(104a-b)；开关机构(106、108)，被配置为将所述至少两个电池中的一个连接到第一电池组