Battery-Buffered EV Fast Charging Without High-Voltage Infrastructure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The installation and maintenance costs of rapid-charging devices for electric vehicles are high, limiting their penetration due to the need for special contracts and high-voltage power infrastructure, making them inconvenient for widespread adoption.
Innovation Solution
A rapid-charging device equipped with a large-capacity storage battery that can be charged using a low-voltage commercial power source, allowing for easy installation and rapid charging of electric vehicles without the need for high-voltage infrastructure, and includes features like a discharging unit, supply destination selection, and a controller for monitoring and communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rapid-charging device with high discharge capacity is installed, then charging speed and convenience are improved, but installation cost and complexity increase due to requirement of high-voltage power receiving substation equipment and special electricity usage contracts
Solution Approach 1:
The patent divides the rapid charging function into two separate components: a mobile rapid-charging device with high discharge capacity and a stationary storage battery. The mobile device can be moved to different locations and connected to standard power sources, while the stationary battery provides bulk energy storage. This segmentation eliminates the need for complex high-voltage infrastructure at each charging location.
Solution Approach 2:
The stationary storage battery acts as an intermediary between the commercial power source and the electric vehicle. It receives power from standard low-voltage commercial sources and stores it, then supplies high-power discharge to the mobile rapid-charging device when needed, enabling rapid charging without direct high-voltage connection to the vehicle.
2Productivity
If a rapid-charging device with high discharge capacity is installed, then charging speed is improved, but maintenance cost increases due to high-voltage power receiving substation equipment
Solution Approach 1:
By separating the high-power discharge function into a mobile device from the power storage function into a stationary battery, the patent eliminates the need for maintenance-prone high-voltage substation equipment. The stationary battery uses standard low-voltage commercial power connections that require minimal maintenance, while the mobile device can be serviced independently at specialized locations.
3Ease of manufacture
If general charging devices are introduced to individual users, then ease of installation is improved, but charging time increases to about 20 hours
Solution Approach 1:
The stationary storage battery performs preliminary energy accumulation by charging from commercial power sources during off-peak hours or when power is available. This pre-stored energy is then rapidly discharged to the mobile charging device when the user needs charging, enabling fast charging without requiring the user to have high-capacity infrastructure installed at home.
Solution Approach 2:
The mobile rapid-charging device serves as an intermediary that the user can move between locations. It contains enough energy storage and discharge capacity to provide rapid charging to the electric vehicle, combining the portability of home chargers with the speed of commercial rapid chargers.
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
Enables easy installation of rapid-charging devices in various locations, reducing costs and increasing convenience by allowing for high-power charging without the need for special contracts or high-voltage infrastructure, while efficiently managing power distribution and user navigation.
Implementation Method 1
a first converter that converts power from a commercial power source and charges the storage battery
Implementation Method 2
a second converter that converts power from the storage battery and discharges the converted power to the external storage battery
Data Source
AI summary
a A rapid-charging device can be easily installed in various locations. The rapid-charging device for rapidly charging an electric vehicle includes: a storage battery; a first converter that converts power from a commercial power source and charges the storage battery; and a second converter that converts power from the storage battery, discharges the same to an on-vehicle storage battery of the electric vehicle, and rapidly charges the on-vehicle storage battery.