Auxiliary power supply circuit and power supply system applied to charging pile
A technology of charging piles and power boards, which is applied in emergency power arrangements, battery circuit devices, charging stations, etc., can solve problems such as power failure of the auxiliary power supply system, power grid power failure, and inability to drive away, and achieve product adaptability and compatibility Strong, guarantees the effect of personal safety
Active Publication Date: 2019-02-12
SHENZHEN WINLINE TECH
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Problems solved by technology
When the electric vehicle is charging, the power grid suddenly loses power, and the auxiliary power supply system will also lose power. At this time, the control board of the charging pile cannot send the unlocking signal of the electronic lock of the charging gun, and the electric vehicle will always be connected to the charging gun and cannot be driven away.
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[0017] The present invention adopts a method similar to that of dual power sources. Under normal working conditions, the AC power supply is used alone, and when the power grid fails abnormally, it is switched to the DC power supply alone. On the one hand, the energy stored in the DC bus capacitor of the charging module is used to maintain the power supply of the control system for a period of time. On the other hand, the power consumption of the control system load is also used as a channel for the energy discharge of the bus capacitor to ensure the personal safety of maintenance personnel. It overcomes some practical application defects of mainstream technologies on the market.
[0018] According to an embodiment of the present invention, an auxiliary power supply circuit applied to a charging pile includes:
[0019] AC circuit breaker 1, charging pile main power module 2, K1 DC main contactor 3, first micro-breaker 4 and second micro-breaker 6, K2 normally open auxiliary co...
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The invention provides an auxiliary power supply circuit applied on a charging pile, wherein an AC-DC redundancy power supply solution is utilized. On the condition that AC power supply exists, a whole charging pile control system is powered singly through the AC power supply; and on the condition that AC power supply is off, the AC power supply is immediately switched to DC power supply (which is generated by energy stored in a bus capacitor) for supplying electric power to the whole charging pile control system. The DC power supply is kept for a certain time period, and then powering-off of the whole control system is performed. According to the auxiliary power supply circuit, AC-DC redundancy power supply solution is utilized. In a normal condition, DC power supplying is not performed. The auxiliary power supply circuit is compatible with two BMS voltage grades and definitely settles some problems in actual application of a product.
Description
technical field [0001] The invention relates to the technical field of power electronics, in particular to a high-power DC charging pile, which is used to provide an auxiliary power supply system solution for the charging pile. Background technique [0002] Recently, in order to promote the development of electric vehicle charging facilities, the country has formulated a new national standard (2015) for the charging pile industry, which is also to unify the interface and charging methods, and facilitate the healthy and stable development of the industry. [0003] At present, the charging guns on the market are basically of the new national standard. Based on safety considerations, the charging guns of the new national standard are equipped with electronic locks. The locking signal of the electronic lock is a positive pulse, and the unlocking signal is a negative pulse. When the electric vehicle is charging, the power grid suddenly loses power, and the auxiliary power supply ...
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IPC IPC(8): H02J7/02H02J9/06B60L53/31
CPCB60L53/31H02J7/02H02J7/345H02J9/062Y02T10/70Y02T10/7072Y02T90/12
Inventor 黎庭朱建国
Owner SHENZHEN WINLINE TECH