As the electric vehicle (EV) revolution accelerates, the High Voltage Power Distribution Unit (PDU) has become the "heart" of the electrical system. It acts as the central hub for distributing high voltage and high current to critical components like the motor controller and battery. The market potential is immense: current industry scale sits at 7 billion RMB and is projected to skyrocket to 16.5 billion RMB by 2025, with a staggering CAGR of 33%. With such rapid growth, ensuring the safety of these high-voltage systems is paramount.
The PDU (Power Distribution Unit) is a compact, centralized distribution box found in all pure electric and plug-in hybrid vehicles. It manages charging and discharging, circuit protection, and high-voltage sampling. Modern PDUs are becoming increasingly complex, often integrating BMS master controls, DC modules, and PTC control modules, requiring sophisticated safety mechanisms.
In such a high-voltage environment (often 400V or 800V platforms), any exposure or loose connection can be fatal. This is where the micro switch plays a life-saving role.
Typically installed on the inner wall of the PDU shell, the micro switch monitors the physical status of the unit. Unionwell’s G3 Series Waterproof Micro Switch is the ideal candidate for this application due to its reliability in harsh automotive environments.
Two Critical Safety Functions:
High Voltage Interlock (HVIL):This is the first line of defense. If the high-voltage wire harness is not connected properly or comes loose, the micro switch (part of the low-voltage detection loop) disconnects. This signal prevents the vehicle controller from powering up the high-voltage system, eliminating the risk of arcing or electric shock.
Cover Open Detection:Maintenance safety is equally important. If the PDU’s top cover is opened for inspection, the micro switch is triggered mechanically. It immediately sends a signal to the vehicle controller, alerting the system that the unit is "Open" and unsafe to energize.
Guangzhou Unionwell (and our brand Huizhou Greetech) is a leader in automotive switching solutions.
Global Compliance: Our switches carry comprehensive safety certifications (UL, cUL, ENEC, CQC), essential for global EV platforms.
Waterproof Reliability: The G3 series is designed to withstand the demanding conditions of automotive chassis and engine bays.
Customization: We offer extensive terminal options and can develop custom switch kits to fit specific PDU housing designs.
In the booming EV market, safety cannot be compromised. Unionwell’s G3 micro switches provide the critical "check" that ensures high-voltage systems operate only when safe.
Contact Unionwell today for a certified, waterproof safety switch solution tailored to your EV architecture.
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Global_Safety_Approvals_Basic_Micro_Switch_G5.webp "Global Safety Approvals Basic Micro Switch G5")
