Detachable Battery Pack Swapping for Faster EV Charging Turnaround
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Solution Overview
Problem
Existing fast charging solutions for electric vehicle battery packs are inefficient, increasing energy consumption and reducing the vehicle's mile range due to the need for complex heat dissipation systems and longer charging times, which cannot meet user demands for quick charging and swapping.
Innovation Solution
A charging and swapping system with a detachable battery pack that uses a support plate connected via a detachable mechanism, allowing for quick disconnection and installation, thereby reducing charging waiting time and improving user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If fixed charging piles are used for electric vehicles, then charging can be performed, but the vehicle cannot be driven before charging is completed and charging time is long
Solution Approach 1:
The battery system is segmented into a battery pack and a support plate that can be detached from each other. The battery pack can be quickly removed and replaced with a charged one, while the support plate remains on the vehicle. This segmentation enables rapid battery swapping without requiring the entire vehicle to be stationary for charging.
Solution Approach 2:
The battery pack is extracted as a separate removable component from the vehicle's battery system. By taking out the battery pack from the fixed installation, it can be independently swapped at charging stations, allowing the vehicle body to remain in use while the battery is recharged or replaced.
2Productivity
If fast charging is implemented, then charging speed increases, but a cooling system with higher heat dissipation power is required, increasing vehicle costs and occupying space
Solution Approach 1:
The battery pack containing the thermal management system is extracted as a removable unit. This allows the cooling system to be optimized specifically for the battery pack rather than the entire vehicle, reducing overall system complexity and vehicle space requirements while maintaining fast charging capability.
3Productivity
If fast charging is implemented, then charging speed increases, but electrical power must be increased to satisfy heating rate, resulting in increased energy consumption and shortened mile range
Solution Approach 1:
The battery system is segmented into a removable battery pack that can be pre-charged externally. This allows the vehicle to receive high-power charging at the station without drawing power during vehicle operation, separating the charging process from the vehicle's energy consumption during driving.
4Productivity
If detachable connection is used for battery pack and support plate, then quick disconnection and installation is achieved, but connection reliability must be maintained
Solution Approach 1:
A detachable connection mechanism serves as an intermediary between the battery pack and support plate. This mechanism enables quick connection and disconnection while maintaining reliable electrical and mechanical connections during use, resolving the contradiction between swapping speed and connection reliability.
Data Source
AI summary
A charging and swapping system for a detachable battery pack includes a battery pack and a support plate. The battery pack includes a housing and a battery cell disposed in the housing. The support plate is connected with the battery pack through a detachable connection. The support plate is disconnected from the battery pack when the battery pack is to be replaced on a vehicle or when charging of the battery pack at a charging station is completed.