Safety Module for Electric Vehicle Charging Stations
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Solution Overview
Problem
Existing electric vehicle charging stations lack comprehensive monitoring of safety devices, leading to potential safety risks due to autonomous operation of individual safety elements, which can result in malfunctions and electric shock hazards.
Innovation Solution
A safety module with a processor that independently monitors sensor values from various sensors within the charging station, allowing for proactive isolation of electrical connections and shutdown of the charging process in case of faults, ensuring continued safety by initiating switch-off signals through switching outputs, even during charging operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual safety devices operate autonomously in known charging stations, then each device can independently protect against specific faults, but no higher-level monitoring exists leading to safety risks when individual safety elements malfunction
Solution Approach 1:
The patent merges multiple autonomous safety devices (fault current switch, contactor, isolation switches) into a unified safety system governed by a central processor. This processor receives sensor inputs from all safety devices and coordinates their operation, providing higher-level monitoring while maintaining individual protection functions. The merging resolves the contradiction by improving overall reliability through centralized coordination while managing complexity through modular integration.
Solution Approach 2:
The patent implements feedback mechanisms where sensors continuously monitor the state of safety devices and feed information to the processor. The processor then adjusts the operation of safety devices based on this feedback, enabling dynamic response to fault conditions. This feedback loop improves reliability by ensuring coordinated safety responses while the structured feedback architecture manages system complexity.
2Reliability
If comprehensive monitoring of safety devices is implemented, then safety risks are reduced and faults are detected earlier, but system complexity and cost increase
Solution Approach 1:
The processor in the safety system performs multiple functions: it monitors sensor inputs from various safety devices, evaluates fault conditions, controls switching operations, and coordinates isolation procedures. This multi-functionality provides comprehensive safety monitoring while avoiding the need for separate dedicated monitoring circuits for each safety device, thus improving reliability without proportionally increasing system complexity.
3Object-affected harmful factors
If safety switches and contactors are provided to interrupt electrical lines, then protection against electric shock is ensured, but response time and coordination between multiple safety devices may be insufficient
Solution Approach 1:
The processor continuously evaluates sensor inputs and prepares control signals in advance, so that when a fault condition is detected, the appropriate safety devices can be activated immediately. This preliminary preparation of control logic and signal pathways reduces the response time required to activate protection measures, ensuring rapid electric shock protection while coordinating multiple safety devices effectively.
Data Source
AI summary
Safety module for a charging station for electric vehicles having at least one processor, a sensor input, and a switching output. In order to be able to ensure the safety of a charging station independently of a charging process, the processor monitors at least one measured sensor value at the at least one sensor input independently of a charging process, and when the measured sensor value at the sensor input exceeds a triggering criterion, the processor outputs a switch-off signal at the switching output.