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Method for operating high-voltage on-board power system of motor vehicle, and high-voltage on-board power system

A power system and operating voltage technology, applied in power system fuel cells, electric vehicles, vehicle energy storage, etc., to achieve the effects of small energy loss, size reduction, and installation space saving

Pending Publication Date: 2020-12-25
VTESCO TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Power losses are also induced by DC voltage converters

Method used

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  • Method for operating high-voltage on-board power system of motor vehicle, and high-voltage on-board power system

Examples

Experimental program
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Effect test

Embodiment Construction

[0035] The figure shows a schematic plan view of the motor vehicle 1 . Motor vehicle 1 has a high-voltage on-board powertrain 2 and a traction unit 3 .

[0036] The traction unit 3 can be designed, for example, as an electric motor. The traction unit 3 notably provides the main drive power of the motor vehicle 1 .

[0037] The high-voltage vehicle power system 2 has an inverter 4 , a fuel cell 5 , a high-voltage battery 6 , a DC voltage converter 7 and a fuel cell connection switch 8 .

[0038] The fuel cell 5 is electrically connected to the high voltage vehicle power system 2 via a fuel cell connection switch 8 . More precisely, by closing the fuel cell connection switch 8, the first high-voltage on-board powertrain section 9 comprising the fuel cell 5 is electrically connected to a second high-voltage on-board powertrain comprising the high-voltage battery 6 and the DC voltage converter 7 Section 10.

[0039] According to an exemplary embodiment, the high voltage batter...

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PUM

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Abstract

A method for operating a high-voltage on-board power system (2) of a motor vehicle (1), in which the following steps are carried out: a) generating a coupling signal (15) for coupling the on-board power system to a fuel cell (5) of the motor vehicle (1); b) carrying out steps c) to f) in accordance with the coupling signal (15); c) activating the fuel cell (5) in accordance with the coupling signal (15); d) determining a current operating voltage (14) of the fuel cell (5); e) adapting an operating voltage (13) of the high-voltage on-board power system (2), uncoupled from the fuel cell (5), tothe operating voltage (14) of the fuel cell (5); and f) coupling the fuel cell (5) to the high-voltage on-board power system (2).

Description

technical field [0001] The invention relates to a method for operating a high voltage on-board powertrain of a motor vehicle. Furthermore, the invention relates to a corresponding high-voltage vehicle on-board powertrain for a motor vehicle, having a high-voltage battery and a fuel cell. The high voltage battery is connected via a DC voltage converter to the inverter of the electric traction unit of the motor vehicle. Background technique [0002] Known high voltage vehicle powertrains with high voltage batteries and fuel cells typically have two DC voltage converters. A DC voltage converter is usually arranged between the fuel cell and the inverter of the electric traction unit, while another DC voltage converter is arranged between the high voltage battery and the inverter. One of the DC voltage converters allows regulation of the operating voltage of the fuel cell, while the other DC voltage converter is used to regulate the operating voltage of the high voltage battery...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L58/30
CPCB60L58/30Y02T90/40Y02T10/70Y02E60/10Y02E60/50B60L58/31B60L50/75H01M16/006H01M2220/20H01M2250/20
Inventor F·乌里希
Owner VTESCO TECH GMBH