Coupling Store Device for a Motor Vehicle

摘要

A motor vehicle includes a generator, electric consuming devices, a first electric energy storage device and a second energy storage device connected in parallel with the first energy storage device. The two electric energy storage devices, in a storage range, have at least partially overlapping characteristic open-circuit voltage curves. The first energy storage device has a first state-of-charge-dependent characteristic charging internal-resistance curve. The second energy storage device has a second state-of-charge-dependent characteristic charging internal-resistance curve. The first energy storage device has a first state-of-charge-dependent characteristic discharging internal-resistance curve and the second energy storage device has a second state-of-charge-dependent characteristic discharging internal-resistance curve. The first characteristic charging internal-resistance curve extends over an entire relative state-of-charge range in the direction of higher resistances above the second characteristic charging internal-resistance curve. The first characteristic discharging internal-resistance curve extends over an entire relative state-of-charge range in the direction of higher resistances below the second characteristic discharging internal-resistance curve. The two energy storage devices are interconnected with one another in a voltage-neutral manner.

主权项

1. A motor vehicle equipped with a generator and electric consuming devices, the motor vehicle comprising:
an energy storage system comprising a first electric energy storage device and a second electric energy storage device, the second electric energy storage device being connected in parallel with the first electric energy storage device, wherein the first and second electric energy storage devices have at least partially overlapping open-circuit voltage characteristic curves in a voltage storage range, the first electric energy storage device has a first state-of-charge dependent characteristic charging internal-resistance curve and a first state-of-charge dependent characteristic discharging internal-resistance curve, the second electrical energy storage device has a second state-of-charge dependent characteristic charging internal-resistance curve and a second state-of-charge dependent characteristic discharging internal-resistance curve, the first characteristic charging internal-resistance curve extends over an entire relative state-of-charge range above the second characteristic charging internal-resistance curve in a direction of higher resistances, the first characteristic discharging internal-resistance curve extends over the entire relative state-of-charge range below the second characteristic discharging internal-resistance curve in the direction of higher resistances, and the first and second electrical energy storage devices are interconnected in a neutral voltage range.