EV (Electric vehicle) OBC （On Board Charger）

Introduction

The On-Board Charger (OBC) is the energy conversion hub of electric vehicles, responsible for converting AC power from home charging stations or public fast-charging piles into DC power that the battery can store. As a critical subsystem of EVs, the OBC directly impacts charging speed, efficiency, and safety.

On-Board Charger (OBC)

Core Functions

Baoquan Zhijie’s EV OBC solutions integrate advanced SiC MOSFETs and IGBTs, delivering:

Energy Conversion - AC-DC rectification optimized for power battery voltage/current requirements
Charging Control - intelligent power adjustment based on battery SOC and temperature, preventing overcharging and ensuring safety
Compatibility - adaptable to home (220V) and public (380V) charging standards

Key Performance Indicators

Power Levels: mainstream EVs typically use 6.6kW (home slow charging) and 11kW (three-phase charging); high-end vehicles support 22kW OBC

Efficiency: ≥90%, reducing charging loss and improving energy utilization
Safety: built-in protection against overvoltage, overcurrent, overheating, and insulation failure

Technology Trends

Integration - combining OBC with DC-DC converters and Power Distribution Units (PDU) for reduced cost and volume
High Power - development toward 22kW and above to shorten charging time
Compact & Lightweight - leveraging LLC resonant topology and high-efficiency semiconductors (SiC MOSFETs, IGBTs)

Why Baoquan Zhijie

As a trusted supplier of EV power electronics, Baoquan Zhijie provides OBC solutions based on SiC MOSFET and IGBT power modules, enabling faster charging, higher efficiency, and robust safety for next-generation electric vehicles.