EV Charger Contactor Interruption for Residential Load Overload
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Residential electric vehicle charging systems often result in service overload, necessitating costly electrical upgrades to accommodate high current draws, which can deter individuals from purchasing electric vehicles due to the associated expenses.
Innovation Solution
An electrical system that includes a first circuit with an electrical control switch, power distribution block, compact circuit protectors, and a current transformer, which splits and regulates the electric current to an electric vehicle charger, and a second circuit that transmits current to the charger via a contactor with a default closed position, allowing the system to interrupt current flow when a load is detected, thus preventing overload without requiring panel upgrades.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high current draw is used to charge electric vehicle battery quickly, then charging efficiency and speed are improved, but residential electrical service overload occurs
Solution Approach 1:
The system dynamically adjusts the current draw to the electric vehicle charger based on real-time monitoring of electrical load conditions. The controller modulates the charging current to prevent service overload while maintaining efficient charging when capacity is available, making the charging rate adaptive rather than fixed.
Solution Approach 2:
The system continuously monitors electrical load conditions and feeds this information back to the controller, which adjusts the charging current accordingly. This closed-loop control ensures that charging operations remain within safe electrical capacity limits while maximizing charging efficiency when possible.
2Power
If electrical panel upgrade is performed to accommodate level 2 charger, then charging capacity is improved, but installation cost increases
Solution Approach 1:
The system changes the operational parameters of the existing electrical panel by implementing intelligent current management and load monitoring. Instead of upgrading the physical infrastructure to handle higher continuous currents, the system optimizes the utilization of existing capacity through dynamic parameter adjustment, achieving effective charging capacity improvement without panel replacement.
Solution Approach 2:
The system creates a virtual capacity expansion through intelligent control algorithms that simulate the effect of having upgraded electrical infrastructure. By implementing sophisticated current management and load scheduling, the system replicates the benefits of a higher-capacity panel without the physical upgrade, effectively copying the functional outcome at lower cost.
3Reliability
If electrical load monitoring is implemented to prevent overload, then electrical service reliability is improved, but system complexity increases
Solution Approach 1:
The controller performs multiple functions including current regulation, load monitoring, fault detection, and communication within a single integrated device. This multi-functionality reduces the need for separate dedicated components for each function, thereby limiting the increase in system complexity while achieving comprehensive electrical service reliability.
Solution Approach 2:
The system combines the electrical control switch, power distribution block, monitoring circuitry, and control logic into an integrated assembly that works as a unified system. By merging these functions into a coordinated unit rather than separate distributed components, the system achieves reliable load monitoring and protection with minimized complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows for efficient electric vehicle charging without overloading residential electrical systems, eliminating the need for costly panel upgrades and reducing costs for consumers by dynamically managing current flow between electric vehicle chargers and other high-current devices.
Implementation Method 1
a current transformer, which splits and regulates the electric current to an electric vehicle charger
Implementation Method 2
a contactor with a default closed position, allowing the system to interrupt current flow when a load is detected
Data Source
AI summary
Systems and methods for interrupting a charging circuit configured to facilitate regulating an electric current to an electric vehicle charger that is electrically coupled to an electrical control switch. An electric current is transmitted from the electrical control switch to a power distribution block that is configured to split the electric current to, in part, a current transformer, via a first compact circuit protector, and the current transformer is configured to further transmit the electric current to an electrical device. The electric current that is split from the power distribution block is further transmitted, via a second compact circuit protector, to a contactor that has a default position that is closed to further transmit the electric current to the electric vehicle charger. Upon activation of an electrical device, the contactor is energized to open, thereby interrupting current flow to the electric vehicle charger.