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Hybrid System With Multiple Energy Storage Devices

一种能量存储装置、能量存储系统的技术，应用在动力装置、电路装置、电池电路装置等方向，能够解决优化系统效率、不能改变DC链路电容器电压等问题

Active Publication Date: 2017-03-08
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, one drawback of existing arrangements of batteries and supercapacitors in vehicle propulsion systems is that the supercapacitors are always connected to the DC link and the battery
Due to the large capacitance of the supercapacitor, therefore, the voltage of the DC link capacitor cannot be changed for a short period of time
Therefore, it is difficult to optimize system efficiency by lowering the DC link voltage when load power demand is low compared to more common systems that do not utilize supercapacitors

Method used

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  • Hybrid System With Multiple Energy Storage Devices
  • Hybrid System With Multiple Energy Storage Devices
  • Hybrid System With Multiple Energy Storage Devices

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0108] An arrangement of a power-dense energy storage device and an energy battery providing increased transient power capability in a hybrid power drive system is shown. Also shown is a method for selectively connecting a power-intensive energy storage device to a drive system with an energy battery and to a drive system with an energy battery that allows rapid changes in the DC link voltage and increases the efficiency of the drive system. Switching device for system disconnection.

[0109] first refer to figure 1 , shows a drive system 10 such as a vehicle propulsion system having an energy system 11 comprising a DC / DC converter 12 and an energy storage system 15 according to an embodiment of the invention. The energy storage system 15 includes a first energy storage device 14 and a second energy storage device 20 . In the exemplary embodiment, first energy storage device 14 is a high specific energy battery and second energy storage device 20 is an ultracapacitor—where t...

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Abstract

A hybrid energy system (11, 102) for providing power to a load (118) and for providing a fast variation of DC link voltage to improve system efficiency is disclosed. The system includes a load (118), a direct current (DC) link (16, 114) electrically coupled to the load (118), an energy storage system (15, 106) having a first energy storage device (14, 110) and a second energy storage device (20, 112) arranged in series, and a bi-directional DC-DC converter (12, 108) electrically coupled to the DC link (16, 114) and to the energy storage system (15, 106), the bi-directional DC-DC converter (12, 108) being connected to a node (21, 124) located between the first energy storage device (14, 110) and the second energy storage device (20, 112) and to a node (22) connecting the second energy storage device (20, 112) to the DC link (16, 114).

Description

Background technique [0001] The present invention relates generally to vehicle propulsion systems, and more particularly, to battery-powered propulsion systems, such as those used in battery-powered electric vehicles, hybrid electric vehicles, or plug-in hybrid electric vehicles. [0002] Electric and hybrid electric vehicles are typically powered by one or more energy storage devices including batteries, ultracapacitors, flywheels, or combinations of these elements alone or in combination with an engine (e.g., internal combustion engine, turbine engine, etc.) One or more of them in order to provide enough energy to power the electric motor. In a pure electric vehicle, one or more energy storage devices power the entire drive system, thereby eliminating the need for an engine. On the other hand, hybrid electric vehicles include energy storage device power to supplement the power supplied by the engine, which greatly improves the fuel efficiency of the engine and the vehicle. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/00B60L11/18H02J7/34
CPCB60L58/10B60L50/40H02J7/345B60L2210/10B60L50/60Y02T10/70Y02T10/72Y02T10/92Y02T10/7072Y02T90/14Y02T90/12B60L53/20B60K6/28B60W10/26B60L53/53B60L53/55H02M3/04H02M7/44
Inventor 许金刚潘迪
Owner GENERAL ELECTRIC CO