Modular EV Power Cell Exchange via Magnetic Coupling
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Solution Overview
Problem
Current battery-based power supply systems for electrical vehicles face issues such as insufficient power capacity, long charging times, battery life concerns, safety and reliability problems, and increased pressure on electricity distribution networks.
Innovation Solution
A power supply system utilizing power cells with cell-side and pod-side magnetic cores for bidirectional magnetic field coupling, enabling efficient power transfer and communication, along with a mechanical transport system for power cell exchange and a system controller for load balancing, which can be enhanced by AI and machine learning techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If battery-based power supply systems are used for electric vehicles, then power storage capacity is limited, but charging time becomes excessively long
Solution Approach 1:
The battery system is divided into modular battery packs that can be independently exchanged. Each battery pack is a self-contained unit with its own power storage capacity, allowing the vehicle to quickly swap between charged and depleted packs rather than waiting for charging.
Solution Approach 2:
A battery management system and exchange infrastructure act as intermediaries between the vehicle and the power grid. The infrastructure stores multiple charged battery packs and facilitates rapid exchange, decoupling the vehicle operation from direct charging time constraints.
2Quantity of substance
If larger battery systems are installed to extend vehicle range, then power capacity increases, but vehicle cost and weight increase
Solution Approach 1:
The vehicle's power capacity becomes dynamic rather than fixed. Users can exchange battery packs based on their immediate range needs, allowing the effective power capacity to adapt to different usage scenarios without permanently carrying excess weight.
Solution Approach 2:
Standardized battery packs can serve multiple functions and be used across different vehicle models or applications. A single pack design can provide auxiliary power, extend range, or serve as portable energy storage, maximizing utility without increasing vehicle weight.
3Productivity
If fast charging infrastructure is deployed to reduce charging time, then charging speed increases, but pressure on electricity distribution network increases
Solution Approach 1:
Battery packs are charged in advance at the exchange infrastructure rather than at the point of vehicle use. This preliminary charging action distributes the power demand over time and location, avoiding concentrated loads on the distribution network when vehicles are actively being charged.
Solution Approach 2:
The charging function is extracted from the vehicle and relocated to the infrastructure. Vehicles receive pre-charged battery packs without needing to connect to charging networks during operation, effectively removing the immediate charging demand from the distribution network.
4Quantity of substance
If battery systems are designed for maximum power density, then power capacity increases, but battery life and safety deteriorate
Solution Approach 1:
The modular battery pack design allows for built-in safety buffers and management systems that can preemptively detect and respond to degradation or safety issues. Each pack can be independently monitored and replaced before failures propagate, cushioning against reliability deterioration.
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 reduces charging time, extends battery life, improves vehicle performance and grid flexibility, and reduces costs for users and the electricity network, while enhancing power supply reliability and stability.
Implementation Method 1
the power cell is configured to form magnetic field coupling with the power pod to transfer power bidirectionally between the power cell and the power pod
Data Source
AI summary
An in-vehicle power supply system includes multiple power cells of identical mechanical size, multiple power pods each holding multiple power cells, and a mechanical transport system to move and exchange power cells with pumps at power cell exchange and charging stations. Each power cell and each power pod includes a control unit and a power converter with a magnetic core. The power cells held by a power pod are arranged parallel to each other and coupled to the power pod by magnetic field coupling. Power is transferred between the power pod and the power cells bidirectionally using magnetic field of different frequencies, and data and commands are communicated between them using magnetic field of another different frequency. Load balancing among power cells within a power pod and among power pods can be achieved. The structure of the power cell exchange and charging stations is also described.