EV Charging Power Allocation Using Shared Charging Modules
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Solution Overview
Problem
Existing charging systems for electric vehicles fail to meet the diverse charging requirements of different vehicles, leading to insufficient or excess power distribution and resource waste due to equal power allocation from charging piles.
Innovation Solution
The implementation of a charging method and device with multiple second charging modules that supplement power when needed, using an energy storage apparatus to determine power allocation based on vehicle demands and state, reducing waste by optimizing power distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If equal power allocation is used from charging piles, then device complexity is reduced, but power distribution efficiency deteriorates and resource waste increases
Solution Approach 1:
The charging system dynamically adjusts power allocation based on real-time vehicle requirements and energy storage state. The control unit continuously monitors charging demands and modifies power distribution among multiple charging guns, transitioning from static equal allocation to dynamic optimized allocation, thereby improving power distribution efficiency without significantly increasing system complexity.
Solution Approach 2:
The system implements feedback control by monitoring the state of charge of vehicles and the available energy in the energy storage apparatus. The control unit receives charging demand information from multiple vehicles, compares it with available power, and adjusts the power allocation in real-time. This closed-loop feedback mechanism ensures optimal power distribution while avoiding energy waste.
2Power
If multiple second charging modules are added to supplement power, then charging power sufficiency is improved, but device complexity increases
Solution Approach 1:
The second charging modules are designed with multi-functionality, serving both as supplementary power sources and as part of the overall power management system. These modules can operate independently or in conjunction with first charging modules, and can charge multiple vehicles simultaneously. The control unit intelligently manages these universal modules to provide required charging power without proportionally increasing system complexity.
Solution Approach 2:
The patent merges the functionality of multiple charging modules into a unified system managed by a single control unit. The first and second charging modules are integrated into one charging station with shared energy storage and control infrastructure. This merging approach allows the system to provide high charging power through multiple modules while avoiding the complexity of fully independent charging stations.
3Reliability
If energy storage switch is disconnected to protect energy storage apparatus, then reliability of energy storage is improved, but power supply continuity deteriorates
Solution Approach 1:
The system performs preliminary actions by pre-charging the energy storage apparatus before high-power charging demands occur. The control unit monitors the state of charge and prepares the energy storage system in advance, ensuring sufficient energy is available before critical charging needs arise. This preliminary preparation allows the system to protect the energy storage apparatus from damage while maintaining power supply continuity through planned energy management.
Solution Approach 2:
The control unit acts as an intermediary between the energy storage apparatus and the charging guns. It manages the disconnection and reconnection of the energy storage switch, coordinating power flow from multiple sources (energy storage, grid, and second charging modules) to ensure continuous power supply. When the energy storage switch is disconnected for protection, the control unit seamlessly transitions to alternative power sources, maintaining charging continuity.
Data Source
AI summary
A charging method comprises: in response to a charging request sent by a device, acquiring a state of charge of an energy storage apparatus, and comparing a charging power of the device with a first supply power of a first charging module corresponding to a charging gun connected to the device; in response to the first charging module not meeting a power supply requirement, determining power to be allocated based on the charging power and the first supply power; based on a second supply power of each second charging module and the power to be allocated, determining at least one second charging module that meets an allocation condition as a target charging module; in response to the state of charge being less than a preset threshold, disconnecting an energy storage switch to supply power to the first charging module and the target charging module through a power grid.