EV Charge-Discharge Authentication Using Broadcast Control Signals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing authentication systems for EV charging facilities require mutual communication between vehicle-mounted equipment, service providing equipment, and an authentication server, leading to increased processing loads, costs, and cybersecurity concerns as the number of vehicle-mounted equipment increases.
Innovation Solution
A charge-discharge control system where each charge-discharge element autonomously controls charging-discharging, with an external control device broadcasting control signals and an authentication device permitting charging-discharging based on permission request signals from the charge-discharge elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mutual communication is performed between vehicle-mounted equipment and authentication server, and between service providing equipment and authentication server, then authentication security is improved, but processing load and cost of authentication server increase
Solution Approach 1:
The authentication system is segmented into multiple independent authentication devices distributed at different service locations rather than relying on a single centralized authentication server. Each authentication device independently verifies permission request signals from charge-discharge elements, distributing the processing load across multiple nodes and eliminating the bottleneck of centralized authentication.
Solution Approach 2:
Charge-discharge elements autonomously generate and transmit permission request signals based on received control signals, and authentication devices independently verify these signals using stored control signal data. This self-service mechanism eliminates the need for continuous centralized server involvement in authentication processes, reducing server processing load while maintaining security.
2Reliability
If mutual communication is performed between vehicle-mounted equipment and authentication server, then authentication security is improved, but communication cost and cybersecurity cost increase
Solution Approach 1:
The authentication function is extracted from the centralized authentication server and embedded into distributed authentication devices located at service points. This extraction eliminates the need for continuous bidirectional communication between vehicle-mounted equipment and the remote authentication server, retaining security verification capability while significantly reducing communication costs and associated cybersecurity expenses.
3Adaptability or versatility
If authentication server collectively generates service information in response to requests from each vehicle-mounted equipment, then service customization is improved, but processing load of authentication server increases
Solution Approach 1:
Control signals containing service information are transmitted in advance from the external control device to multiple charge-discharge elements before authentication is needed. Authentication devices store these control signals and use them for verification, eliminating the need for real-time service information generation and customization processing by the authentication server during authentication operations.
Data Source
AI summary
A charge-discharge control system is provided in which each of a plurality of charge-discharge elements autonomously controls charging-discharging. The charge-discharge control system includes an external control device that broadcasts a control signal to the charge-discharge elements that perform charging-discharging; and an authentication device that permits charging-discharging of each of the charge-discharge elements. The charge-discharge elements having received the control signal transmit, to the authentication device, a permission request signal, which is based on the received control signal. The authentication device having received the permission request signal determines whether the permission request signal is a permission request signal based on the control signal received by the charge-discharge elements, and the authentication device connects a power line for performing charging-discharging to the charge-discharge elements if the authentication device determines that the permission request signal is the permission request signal based on the control signal received by the charge-discharge elements.