EV Plug Detection Unit for Safe Standard Socket Charging
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Solution Overview
Problem
Standard electrical sockets for charging electric vehicles lack a mechanism to prevent the charging cable from being unplugged under load, leading to arcing, damage, and user safety risks, while also restricting charging to specialized facilities only.
Innovation Solution
An electrical plug with a detection unit that senses tensile force or movement thresholds to generate a switch-off signal, allowing safe disconnection and enabling charging at any standard socket by interrupting energy transmission before the plug separates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If standard electrical sockets are used for charging electric vehicles, then ease of operation is improved, but reliability deteriorates due to risk of arcing and damage when unplugged under load
Solution Approach 1:
The detection unit detects loosening of the plug connection in good time and triggers a switch-off signal that interrupts energy transmission before the plug is fully separated. This preliminary action prevents arcing and damage that would occur if disconnection happened under load, while still allowing users to easily plug and unplug at standard sockets.
2Reliability
If mechanical buttons or electromechanical locks are used to prevent unplugging under load, then reliability is improved, but device complexity increases and ease of operation deteriorates
Solution Approach 1:
The detection unit automatically detects when the plug connection is loosening and triggers the switch-off signal without requiring any user action. This self-service mechanism eliminates the need for mechanical buttons or electromechanical locks, allowing users to simply plug and unplug without having to press buttons or wait for charging completion, while still ensuring safe disconnection.
3Reliability
If specialized EVSE facilities with locking devices are used, then reliability is improved, but adaptability deteriorates as charging is restricted to specific locations
Solution Approach 1:
The electrical plug with the detection unit and switch-off mechanism can be used with any standard electrical socket, not just specialized EVSE facilities. This universal design allows electric vehicles to be charged at any standard socket while the automatic detection and interruption system ensures safe disconnection, combining the versatility of standard sockets with the safety of locked facilities.
4Ease of operation
If the plug connection is allowed to loosen without detection, then ease of operation is improved, but harmful factors increase due to arcing and potential burns
Solution Approach 1:
The detection unit continuously monitors the plug connection status and provides feedback by detecting when loosening occurs. When the detection unit senses that the connection is loosening, it triggers the switch-off signal to interrupt energy transmission, preventing arcing and burns while allowing users to easily manipulate the plug without concern for safety.
Data Source
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AI summary
The invention relates to an electrical plug (24) having a connection unit (36) which can be coupled to an electrical line (26) in order to transmit electrical energy, having at least one electrical contact pin (30) which has a plug section (32) and a coupling section (34), wherein the coupling section (34) is electrically coupled to the connection unit (36), and wherein the plug section (32) is designed to provide a releasable plug connection to an associated contact socket (18) in order to electrically couple the contact pin (30) to the contact socket (18), and having a detection unit (38) which is designed to detect a tensile force which is exerted on the contact pin (30) and/or a movement of the contact pin (30) relative to the contact socket (18), and to provide a disconnection signal for interrupting the energy transmission process.