Multi-power-section parallel connection quick charging system and method

A fast charging and multi-power technology, applied in charging stations, electric vehicle charging technology, electric vehicles, etc., can solve the problems of high equipment cost, large volume, and reduced charging station income, and achieve the goal of increasing income and reducing power fluctuations Effect

Active Publication Date: 2016-10-26
STATE GRID SHANDONG ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Level 3 DC charging piles are mostly AC-DC power electronic devices with large volume and high equipment cost
[0006] There may be multiple charging piles in a DC charging station. Because the charging time of the car is different, at some point, only a few charging piles may be working, and the redundant charging piles cannot play a role. Considering the high price of charging piles, charging piles Idle will reduce charging station revenue
like figure 1 As shown, in the current situation, when the number of electric vehicles is less than the number of charging piles, each electric vehicle still has a charging pile for power supply, and the charging time is still very long, which affects people's experience of using electric vehicles
And with the continuous development of electric vehicles, not only more and more electric cars will appear, but also a large number of other forms of electric vehicles, such as electric buses, electric trucks, etc. Different types of electric vehicles have different charging power requirements. Charging piles with low power cannot meet the needs of high-power electric vehicles. Although charging piles with high power can meet the requirements of all electric vehicles, they will increase the cost of charging piles

Method used

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  • Multi-power-section parallel connection quick charging system and method

Examples

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example 1

[0045] Assuming that there are currently 3 vehicles that need to be charged, the maximum charging power required is: P EVmax1 ,P EVmax2 ,P EVmax3 , the relationship between the maximum charging power and the charging pile power satisfies the following relationship:

[0046] P EVmax1 Cmax

[0047] P Cmax ≤P EVmax2 Cmax

[0048] 2P Cmax ≤P EVmax3

[0049] When the number of idle charging piles is large, by using the multi-power segment parallel charging technology proposed in this patent, the charging status of the three vehicles is as follows: Figure 4 shown. Vehicle 1 is powered by one charging pile, vehicle 2 is powered by two power supply piles, and vehicle 3 is powered by two power supply piles.

example 2

[0051] On the basis of Example 1, the charging piles are all in working state at this time, or directly supply power to the electric vehicle, or supply power to the electric vehicle through the connecting device. At this time, another car is connected to one of the "slave charging piles". Such as Figure 5 As shown, the slave charging pile will become the "main charging pile" to supply power to the cars on the charging pile.

[0052] On the basis of the existing charging device, the present invention adds a small amount of simple power electronic devices and switches, so that the DC side power of the charging pile can be flexibly exchanged among multiple charging piles. When a single charging pile can meet the charging power requirements, it will be powered by a single charging pile. When a single charging pile cannot meet the charging power requirements, the charging station control center will reasonably arrange the parallel power supply mode of the charging piles according...

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Abstract

The invention discloses a multi-power-section parallel connection quick charging system and method. The multi-power-section parallel connection quick charging system comprises multiple charging piles. The adjacent charging piles communicate with one another and are electrically connected through connectors. Each charging pile comprises a controller and a convertor. The controller of each charging pile communicates with a device to be charged, the maximum charging power of the device to be charged is obtained, and the charging piles meet the requirement of the device to be charged for the maximum charging power in the manner that the adjacent charging piles are connected in parallel according to the maximum power of the charging piles and the maximum charging power of the device to be charged. On the basis that the output power of the charging piles is not increased, a charging station can meet the requirements of more types of charging automobiles.

Description

technical field [0001] The invention relates to the technical field of electric vehicle charging, in particular to a multi-power stage parallel fast charging system and method. Background technique [0002] In recent years, with the development of electric vehicle (Electric Vehicle) and plug-in hybrid electric vehicle (Plug-inHybrid Electric Vehicle) technologies, electric vehicles will gradually replace traditional automobiles and become an important means of transportation for people to travel. The charging technology of electric vehicles has received more and more attention, and a variety of effective charging structures and charging methods have been proposed in academia and industry. According to the location of the charging device, it can be divided into on-board charging device (On-board) and off-board charging device (Off-board), and the on-board charging device can be further divided into charging device with conductive line and charging device without conductive li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/18
CPCB60L53/11B60L53/31Y02T10/70Y02T10/7072Y02T10/72Y02T90/12Y02T90/14Y02T90/16
Inventor 段美琪段辉颜廷利赵全富董启春蔺凯李秀红李淑云毕胜华韩明马帅
Owner STATE GRID SHANDONG ELECTRIC POWER
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