High Voltage EV Connectors: 5100+ Patents, Global Compliance

A high voltage quick disconnect is a specialized connector or assembly designed to allow for the rapid and safe separation of high-voltage electrical circuits, typically in electric vehicles (EVs) or battery energy storage systems. Its primary purpose is to provide a manual service disconnect point that enables technicians, first responders, or maintenance personnel to quickly and safely isolate the high-voltage battery pack from the rest of the vehicle's electrical system during service, emergencies, or storage. This component is a critical safety feature, as it ensures that the high-voltage bus is de-energized before any work is performed, protecting individuals from potentially lethal electrical shock. JONHON is a leading manufacturer of high-performance high voltage quick disconnect assemblies, engineering them with the utmost attention to safety and reliability. Our quick disconnects are designed to handle the full voltage and current of the EV's traction battery system. With a dedicated team of over 400 engineers in our electric vehicle business unit and a portfolio of over 300 EV-related patents, JONHON's designs incorporate a key sequence of operations to ensure safety. Typically, the act of pulling the disconnect handle first breaks the High Voltage Interlock Loop (HVIL) circuit, which signals the system to open the main contactors and de-energize the circuit before the high-power contacts physically separate. This sequenced break prevents dangerous arcing. The disconnect assembly itself is often ergonomically designed with a distinct color (often orange, the global standard for high-voltage components) and shape for easy identification and operation, even with protective gloves. It may also incorporate internal fusing for additional circuit protection. The disconnect's housing provides robust environmental sealing to protect the internal contacts from moisture and contaminants. JONHON's active participation in formulating 7 IEC standards ensures our high voltage quick disconnects meet global safety requirements. For EV manufacturers, integrating a JONHON high voltage quick disconnect is an essential element of a failsafe high-voltage architecture. Please contact us to discuss your specific requirements for this critical safety component.