Distributed high-frequency AC electrical system for the electric vehicle

Patent metadata

Field	Value
Publication number	US-11214148-B2
Application number	US-201615779127-A
Country	US
Kind code	B2
Filing date	Nov 25, 2016
Priority date	Nov 27, 2015
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

The present invention discloses a distributed high-frequency AC electrical system for the electric vehicle. The system divides all loads of the electric vehicle into four load areas according to their spatial positions. Four high-frequency inverters and four DC input interfaces are contained in the system, with each of the four load areas being configured with one of the four high-frequency inverters, and each of the four high-frequency inverters being configured with one of the four DC input interfaces. One end of each DC input interface is connected to the DC side of the corresponding high-frequency inverter, and the other end is connected to the storage battery of the electric vehicle. Each high-frequency inverter outputs a high-frequency AC bus to supply power for the loads in the corresponding load area, and the four high-frequency inverters are in a parallel operation state through a high-frequency connection point that connects the four high-frequency AC buses. The present invention has the advantages of simplifying the electrical system structure of the electric vehicle, improving the system stability, and the like.

First claim

What is claimed is:

1. A distributed high-frequency AC electrical system for an electric automobile, wherein all loads of the electric automobile are divided into four load areas according to their spatial positions, which are a front lighting and motor load area, a right lighting and motor load area, a left lighting and motor load area, and a high-power load area including an electric suspension system of the electric automobile; four high-frequency inverters and four DC input interfaces are contained in the system, with each of the four load areas being configured with only one of the four high-frequency inverters, and each of the four high-frequency inverters being configured with one of the four DC input interfaces; one end of each of the DC input interfaces is connected to a DC side of the corresponding high-frequency inverter, and the other end is connected to a storage battery of the electric automobile; each high-frequency inverter outputs a high-frequency AC bus to only supply power for the loads in the corresponding load area; the four high-frequency inverters are in a parallel operation state through a high-frequency connection point that connects the four high-frequency AC buses; wherein each of the four high-frequency inverters comprises three separate connection ends, a first connection end is connected to the corresponding high-frequency AC bus, a second connection end is connected to the high-frequency connection point common to the four high-frequency inverters, and a third connection is connected to the corresponding DC input interface; and wherein each of the four high-frequency inverters is distributed in the corresponding load area, the loads in the four load areas comprise at least one DC load and at least one AC load, and each load in the four load areas is connected to the high-frequency AC bus through a high-frequency transformer, and an AC/DC rectification module or an AC/AC frequency conversion module.

2. The distributed high-frequency AC electrical system for the electric automobile according to claim 1 , wherein the storage battery is connected to the four high-frequency inverters through a DC bus.

Assignees

• Univ South China Tech

Inventors

• Liu Junfeng
• Wu Jialei
• Zeng Jun
• Luo Fei

Classifications

• H02J4/25

  for transfer of electric power between AC and DC networks, e.g. for supplying the DC section within a load from an AC mains system · CPC title

• H02J2105/30

  the load networks being external to vehicles, i.e. exchanging power with vehicles · CPC title

• H02M5/225

  comprising two stages of AC-AC conversion, e.g. having a high frequency intermediate link · CPC title

• B60L1/00

  Supplying electric power to auxiliary equipment of vehicles (circuit arrangements for charging batteries H02J7/00) · CPC title

• B60L1/14 Primary

  to electric lighting circuits · CPC title