Power-Sharing EV Charging System via Shared Bus
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Solution Overview
Problem
Charging systems for electric vehicles face inefficiencies due to limited power supply capacity and the division of charging devices into slow and rapid charging categories, leading to inadequate power distribution and inconvenient charging processes.
Innovation Solution
A charging system that allows at least two charging devices to share power, enabling one device to supply more power than its limited capacity by connecting via a shared bus, and equips each device to switch between slow and rapid charging modes based on available capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the power supply capacity of charging devices is limited by hardware and policy, then the system can maintain stability and manageability, but the charging power available to vehicles becomes insufficient
Solution Approach 1:
The patent combines multiple charging devices into a power-sharing network where excess power from one device can be transferred to another. This merging allows the system to overcome individual device power limits while maintaining manageable hardware configurations, directly resolving the contradiction between limited power capacity and insufficient charging power availability
Solution Approach 2:
Charging devices are equipped with dual functionality: they can operate independently within their power limits and simultaneously participate in power sharing with other devices. This multi-functionality allows the same hardware to adapt to both stable operation mode and high-power demand mode, resolving the contradiction between system stability and power sufficiency
2Adaptability or versatility
If charging devices are divided into slow charging devices and rapid charging devices, then the system can cater to different charging needs, but the operation becomes inconvenient when vehicles need to switch between charging modes
Solution Approach 1:
The patent implements dynamic power sharing where charging devices can flexibly adjust their power output and receive power from other devices based on real-time demand. This dynamic capability allows a vehicle connected to one charging device to receive rapid charging power through power sharing without needing to physically disconnect and reconnect to a different device, maintaining both adaptability and operational convenience
3Reliability
If limited power is supplied to a charging device while another charging device has sufficient available power, then the power supply remains within capacity limits, but the charging system operates inefficiently
Solution Approach 1:
The patent implements a power-sharing control system that continuously monitors the power status of all charging devices and dynamically redistributes power based on real-time conditions. When one device has excess power and another is power-limited, the system automatically transfers power through the shared bus, ensuring both reliable capacity management and high charging efficiency by eliminating idle power resources
Data Source
AI summary
The present disclosure provides a charging system including: at least two charging devices including at least two output units configured to supply connected automobiles with charging power, a first bus electrically connected to the output units and configured to transfer charging power to the output units, and a power processing unit configured to process power, which is supplied from a power source, using a first capacity and supply the first bus with the processed power; and a second bus configured to connect a first bus of a first charging device and a first bus of a second charging device, wherein, when a total capacity of charging power supplied to automobiles connected to the first charging device exceeds the first capacity, a part or all of lacking capacity is supplied via the second bus.