Low-power-consumption standby control circuit adaptive to new and old charging piles

By designing a low-power standby control circuit that is suitable for new and old charging piles, utilizing the series design of the main circuit control unit and the zero-power control unit, and combining it with the pre-charging control unit, the electric vehicle charging equipment can achieve zero reactive loss and low active loss switching in standby state, solving the defects of continuous standby power consumption and magnetic latching relay solutions in the existing technology, reducing hardware costs and improving system reliability.

CN120613831APending Publication Date: 2025-09-09SHIJIAZHUANG TONHE ELECTRONICS TECH CO LTD
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Patent Information

Application Number
CN202510847499.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-24
Publication Date
2025-09-09

AI Technical Summary

Technical Problem

In the existing technology, electric vehicle charging equipment still has continuous standby power consumption when there is no vehicle connected or after charging is completed, and it is impossible to achieve zero power consumption. In addition, the magnetic latching relay solution has defects such as high driving power, high cost, and short life.

Method used

A low-power standby control circuit suitable for new and old charging piles is designed. The EMC filter unit is disconnected by the main circuit control unit. Combined with the series design of zero-power and low-power control units, a non-magnetic latching relay is used to achieve adaptive switching between zero reactive loss and low active loss. The pre-charge control unit eliminates the inrush current, and a time-sharing multiplexing strategy is used to reduce the load of the auxiliary rectifier unit.

Benefits of technology

It achieves switching between zero reactive loss and low active loss in standby mode, reduces hardware costs, extends relay life, improves system reliability and compatibility, and meets energy efficiency regulations.

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Abstract

The invention relates to the technical field of electric vehicle charging equipment, in particular to a low-power-consumption standby control circuit adaptive to new and old charging piles. The circuit comprises a main loop control unit, a pre-charging control unit, an EMC filtering unit, a main power rectification unit, a zero power consumption control unit, a low power consumption control unit, an auxiliary power supply unit and an auxiliary rectification unit. Through the relay combination design of the main loop control unit, the zero-power-consumption control unit and the low-power-consumption control unit, dual-mode switching of zero power consumption and low power consumption in a standby state is realized. The module does not need to replace a magnetic latching relay or newly add an auxiliary power supply system, an old charging pile can directly achieve low power consumption (zero reactive power + low active power), a new charging pile achieves zero power consumption (zero reactive power + zero active power) through a 12V driving signal, standby power consumption and design cost are remarkably reduced, and the method is suitable for energy efficiency optimization of various non-vehicle-mounted chargers.
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