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Electrical energy system comprising fuel cells

A fuel cell and energy technology, applied in the field of electrical energy systems, can solve the problems of the cost and volume impact of the maximum charging power charger, achieve the effect of small components and control costs, small weight and volume, and achieve charging power

Pending Publication Date: 2021-03-16
AUDI AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the maximum charging power of a charger has a significant impact on the parameter design and thus the cost and size of the charger

Method used

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  • Electrical energy system comprising fuel cells
  • Electrical energy system comprising fuel cells

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Embodiment Construction

[0022] figure 1 A schematic diagram of a prior art energy system 10 with an AC charger 14 and connected consumers 17 , 18 , 19 is shown. The energy system 10 includes a fuel cell 11 and an HV battery pack 12 as energy sources. These energy sources are connected via a DC converter 13 with galvanic isolation. An AC charger 14 is connected between the DC / DC converter 13 and the HV battery pack 12 . The AC charger 14 of the energy system 10 comprises: a DC / DC converter 15 with galvanic isolation; and an AC / DC converter 16 with power factor correction (PFC, “Power Factor Correction”). Connected to the energy system 10 are at least one pulse inverter 17 and at least one electric motor 18, and also other HV components 19, such as auxiliary equipment for fuel cells, 12V DC / DC converters, HV heaters, electric air conditioning compressors wait.

[0023] figure 2 A schematic diagram of an embodiment of an energy system 10 according to the invention with an AC charger 14 and con...

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PUM

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Abstract

The invention relates to a fuel cell-containing electrical energy system and to a method for operating an electrical energy system for a motor vehicle.

Description

technical field [0001] The invention relates to an electrical energy system comprising a fuel cell and to a method for operating an electrical energy system of a motor vehicle. Background technique [0002] In mobile fuel cell applications, such as fuel cell vehicles, an energy system with a high voltage circuit (HV circuit) usually includes two accumulators. Typically, the fuel cell (BZ) is one of these two accumulators, and the HV battery pack is the second. Since the fuel cell has a voltage that is closely related to the load, it is usually coupled to the HV battery pack via a direct current converter (DC / DC converter). The DC / DC converter adapts the different voltages of the BZ and HV battery packs. Due to the very low insulation resistance of fuel cells, DC / DC converters are often implemented with galvanic isolation. As a result, the limit values ​​legally required and stipulated by standards for the insulation resistance on the side of the HV battery pack can be com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L58/40B60L53/10B60L53/14B60L50/75B60L50/70
CPCB60L58/40B60L53/11B60L53/14B60L50/75B60L50/70Y02T90/40Y02T10/70Y02T10/7072Y02T90/14Y02T90/12B60L53/60B60L2210/10H02M1/42
Inventor M·布罗M·席德迈尔
Owner AUDI AG