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Rapid multi-level recharge system

A fast charging and charger technology, applied in electric braking system, electric energy storage system, charging station, etc., can solve problems such as control complexity

Active Publication Date: 2014-04-16
HYDRO QUEBEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the supply and maintenance of a continuous voltage with several levels on the DC side causes control and / or complexity issues

Method used

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Examples

Experimental program
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Embodiment Construction

[0041] see figure 2 , shows a method for use with an electrical power device 4 (as in the figure 2 A power battery of an electric vehicle in the case shown) exchanges energy with a multi-stage fast charging system. The rapid charging system has terminals 6 , 8 for connection to an electrical power unit 4 . n converter stages 16 and m energy internal storage stages 10 are connected in series between terminals 6 , 8 , wherein n≧1, m≧0 and n+m≧2. Each converter stage 16 has a power converter 18 coupled to an arrangement having an intermediate traction battery module 14 (e.g., as Figure 18 shown) and / or a connection 26 to a power supply 20 that is in figure 2The cases shown are connected or not connected to a power network 2 . Each energy internal storage stage 10 has an intermediate traction battery module 14 . Each intermediate traction battery module 14 is characterized by a high no-load voltage relative to the voltage drop caused by the internal impedance (not shown) of ...

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Abstract

The invention relates to a rapid multi-level recharge system. The system uses an intermediate power battery as a voltage point, such that a converter having a fraction of the output voltage can control the entire transfer of power to or from the battery of a vehicle or an electric power device. The intermediate battery comprises multiple stages in series, associated with small respective chargers that allow the stage load balancing of the intermediate battery to be managed since the chargers can be controlled in such a way as to vary the contribution of each stage separately.

Description

technical field [0001] The present invention relates generally to a charging system, and more particularly to a multi-stage fast charging system with nested converters and internal memory stages. Background technique [0002] The emergence of new power batteries (specifically lithium-ion with nano-titanate, exhibiting a very low internal impedance, a very good resistance to deep discharge and a lifetime of thousands of cycles) contributes to the rapid charger strong demand. It is now possible to charge a vehicle in 5 minutes. For example, a bus with a minimum number of on-board batteries can run about twenty kilometers autonomously and be recharged in a few minutes at a terminal. [0003] One problem exists in the economical construction of chargers that can handle the power levels required for such recharging speeds. The power involved is in the order of several hundred kilowatts or even megawatts in the case of trains and buses. [0004] Not only do chargers have to ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J15/00
CPCH02J7/00Y02T10/7005Y02T10/7241Y02T90/127Y02T10/7061B60L2200/26B60L11/1816B60L2210/40B60L2210/10B60L11/1805Y02T10/7088Y02T90/121Y02T10/7055B60L11/1866B60L7/12B60L2240/527H02J7/02Y02T90/128Y02T90/14B60L11/185H02J7/007H02J7/0054Y02T10/7216H02J7/0024B60L2240/529Y02T10/7072B60L53/14B60L50/52B60L53/11B60L58/22H02J7/342Y02T10/70Y02T10/72H02J15/007Y02T90/12H02J5/00
Inventor F·博勒加德
Owner HYDRO QUEBEC CORP