Vehicle

Provided are an in-vehicle power supply system and a vehicle in which a battery having a relatively high output and a battery having a relatively high capacity are connected in parallel and in which stable battery output can be performed. In an in-vehicle power storage system in which an output-type battery pack and a capacity-type battery pack are connected in parallel, a battery control device preferentially supplies power to a load from the output-type battery pack when a vehicle accelerates, and supplies power to the load from a capacity-type first battery pack in parallel with power supply to the load when the speed of the vehicle is constant. Power is supplied from the capacity-type second battery to the output-type battery pack. 提供一种将相对高输出的电池与相对高容量的电池并联连接，并且能够执行稳定的电池输出的车载电源系统以及车辆。在输出型电池组与容量型电池组并联连接的车载蓄电系统中，电池控制装置在车辆加速时优先从输出型电池组对负载进行电力供给，在车辆的速度恒定时与从容量型第一电池组向负载进行电力供给并行地，从容量型第二电池向输出型电池组进行电力供给。