EV Charging Device Controller for Remote Protection Reset
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Solution Overview
Problem
Existing charging stations for electric vehicles often require costly and time-consuming maintenance after protective devices are activated due to excessive current, which can damage components within the station and vehicle.
Innovation Solution
A charging device with a controller and protection system that monitors current and temperature, adjusting current flow and isolating the power conduit if thresholds are exceeded, allowing for remote reset of secondary protection devices to prevent component damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If protective devices are used to prevent excessive current damage, then component safety is improved, but maintenance complexity and downtime increase due to required technician visits for resetting
Solution Approach 1:
The charging device automatically resets the protective device through its controller after detecting that the excessive current condition has cleared, eliminating the need for manual technician intervention. The system monitors current levels and autonomously restores charging functionality by resetting the protective mechanism.
Solution Approach 2:
The controller continuously monitors current flowing through the power cable and provides feedback to the protective device. When current returns to normal levels, the controller receives feedback and automatically initiates the reset sequence, creating a closed-loop control system that manages protection and restoration.
2Reliability
If protective devices are activated to prevent component damage, then component reliability is improved, but time loss increases due to required maintenance visits
Solution Approach 1:
The charging device performs self-resetting of protective devices without requiring external technician intervention. The controller automatically detects when fault conditions resolve and restores charging operations, eliminating waiting time for scheduled maintenance visits.
Solution Approach 2:
The system prepares for potential faults by having the controller continuously monitor current conditions and pre-configure the protective device for automatic reset capability, so that when faults occur and resolve, the system can rapidly restore operation without delayed intervention.
3Productivity
If higher current is transmitted to charge vehicles faster, then charging speed is improved, but risk of excessive current damage increases
Solution Approach 1:
The controller dynamically adjusts the charging current based on real-time monitoring of system conditions, vehicle battery state, and protective device status. This allows the system to operate at high current levels when safe and automatically reduce or interrupt current when approaching dangerous thresholds.
Solution Approach 2:
The system implements continuous feedback monitoring of current levels, temperature, and protective device state. When current approaches excessive levels, the feedback mechanism triggers controller intervention to reduce or interrupt charging, preventing damage while maximizing safe charging speed.
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
Reduces the need for physical maintenance visits by allowing remote reset of protection devices and protecting components from excessive current, thereby minimizing downtime and maintenance costs.
Implementation Method 1
measuring at least one of a temperature within the charging device and a current flowing through the charging device
Implementation Method 2
measuring at least one of a temperature within the charging device and a current flowing through the charging device
Implementation Method 3
a first protection device configured to electrically isolate the charging device from the power storage device if a current flowing through the power conduit exceeds a current limit
Implementation Method 4
The current supplied to the power storage device is adjusted based on at least one of the measured temperature and the measured current
Data Source
AI summary
A charging device for use with an electric vehicle including a power storage device. The charging device includes a power conduit configured to electrically couple the power storage device to the charging device. The charging device includes a first protection device configured to electrically isolate the charging device from the power storage device if a current flowing through the power conduit exceeds a current limit. The charging device also includes a controller configured to control the current flowing through the power conduit if the current flowing through the power conduit causes an integration threshold to be exceeded, wherein the integration threshold is representative of a predetermined amount of current that is enabled to flow through the power conduit over a predetermined period of time.