Portable EV Trunk Charger With Modular Li-Ion Emergency Backup
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Solution Overview
Problem
The existing solutions for charging electric vehicles (EVs) when their batteries are completely discharged are inefficient, as they often require long waiting times, difficulty in accessing remote areas, and high fees, and can damage the EV battery, while also posing challenges in towing due to locked brakes.
Innovation Solution
A portable, modular, and compact Emergency On-Board EV Charger (EOBC) with a high power Li-ion battery pack and true sine inverter, designed for easy placement in an EV's trunk, equipped with a smartphone app for monitoring and safety features, allowing for safe and efficient charging of any EV model.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a portable, modular, and compact Emergency On-Board EV Charger (EOBC) is designed for easy placement in an EV's trunk, then ease of operation is improved, but device complexity increases due to integration of high power Li-ion battery pack and true sine inverter
Solution Approach 1:
The EOBC is designed as a modular system with separable components including a removable battery pack, inverter unit, and control module. This segmentation allows the charger to be easily placed in the trunk while maintaining manageable complexity through standardized interfaces and independent functionality of each module.
Solution Approach 2:
The compact design employs nested arrangement where the battery pack, inverter, and control systems are integrated in a space-efficient manner. The battery pack can be nested within or adjacent to the inverter housing, optimizing trunk space while keeping the overall device compact and easy to install.
2Productivity
If the EOBC delivers high power charging to extend EV range by 5 to 40 miles per hour, then productivity is improved, but weight increases affecting portability
Solution Approach 1:
The system uses high-density Li-ion battery cells with optimized energy density parameters to achieve high power output in a lighter weight package. The true sine inverter is designed with high efficiency conversion ratios to maximize power delivery while minimizing weight, enabling 5-40 miles of range extension per hour of charging without excessive weight gain.
3Reliability
If the EOBC includes comprehensive safety protections against short circuits, overloads, and critical temperatures, then reliability is improved, but device complexity increases
Solution Approach 1:
The EOBC incorporates self-diagnostic and self-protecting mechanisms where the Battery Management System (BMS) and control circuits automatically detect and respond to abnormal conditions such as short circuits, overloads, and temperature extremes. This self-service approach to safety reduces the need for complex external safety systems while maintaining high reliability through automated protection protocols.
4Power
If insurance company charging services use big batteries and big inverters loaded on trailers, then power delivery capability is improved, but ease of operation deteriorates due to difficulty accessing remote areas and long waiting times
Solution Approach 1:
The EOBC extracts the essential charging function from the bulky insurance company trailer systems and places a compact, high-power charging unit directly in the EV trunk. This extraction maintains sufficient power delivery capability for emergency charging while eliminating the need for large trailers and complex deployment logistics, enabling immediate use in remote areas without waiting for external service arrival.
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
The EOBC provides 5 to 40 miles of extra range per hour of use, is lightweight for single-person handling, and includes safety protections, extending EV battery life while enabling quick and reliable charging without damaging the vehicle.
Implementation Method 1
A portable, modular, and compact Emergency On-Board EV Charger (EOBC) with a high power Li-ion battery pack
Implementation Method 2
A portable, modular, and compact Emergency On-Board EV Charger (EOBC) with a high power Li-ion battery pack and true sine inverter
Data Source
AI summary
The present invention safely places an Emergency On-Board charger in the trunk of any EV in the market. When using it for one hour, it can extend the range depending on the EV. A modular and compact design that perfectly fits any EV and that is light enough to be carried around by a single person, and it only needs to be charged when used or each trimester. It has a smartphone app monitor system that allows the user to keep a track of the energy on the device, and several safety measures such as a sturdy case, Battery Management System (BMS), protection against overload, critical temperatures and short circuits, and fire extinguishers to ensure the safety of the customer.