6.6kw Liquid-Cooled on-Board Charger (OBC) Module

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6.6kw Liquid-Cooled on-Board Charger (OBC) Module

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Product Description

Basic Information Overview

Model NO.

VTC6K6-220S380/540/640-W

Max Output Current

20A/14A/12A

Auxiliary Power

9~32VDC

Efficiency

Above 94%

Communication

Can-Bus

EMC Standard

GB/T18387-2008, En 55022

Specification

OBC Liquid Cooled

Origin

China

Product Strength & Versatility

Full Series Solutions: Extensive range suitable for electric vehicles, including integrated MCU units (6-in-1 to 2-in-1), auxiliary motor controllers, and integrated motor+gearbox systems.
Wide Compatibility: Designed for permanent magnet synchronous motors (PMSM) and asynchronous motors with a power range from 3kW to 355kW.
Proven Reliability: More than 6,000 units have been operated safely for 8-10 years, covering 500,000 to 700,000 kilometers per vehicle in demanding urban environments.
Diverse Applications: Supporting passenger buses (8.5m-18m), trucks (2.5t to 55t), special-purpose sanitation/sprinkler vehicles, and marine power systems.
Customized Design: Advanced platform technology allows for customized matching between the motor, MCU, and vehicle systems to optimize performance.

Product Features

Cooling Method

Liquid cooled, flow rate >6L/min

IP Rating

IP67 Waterproof/Dustproof

Diagnostics

On-line upgrade & fault diagnosis

Design

Full digital SW with redundant protection

Main Technical Parameters

Items	Technical Parameters	Remarks
Operation Temperature	-40~85℃	Coolant inlet temperature
Nominal Output Power	6.6kW	-
Input Voltage Range	85~265Vac	-
Output Voltage Range	200~450Vdc / 400~650Vdc / 450~750Vdc	Multiple variants available
Efficiency	≥94%	Nominal voltage
Voltage Accuracy	±1%	-
Current Accuracy	±3%	-
Low Voltage Wake-up	200mA max	Wake up BMS/VCU
Static Current	≤2mA	Sleep mode consumption
Protections	Input OVP/UVP, Output OVP/UVP, OTP, OCP, Short circuit, Communication fault

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Frequently Asked Questions

What is the energy conversion efficiency of this OBC?

The 6.6kW Liquid-Cooled On-Board Charger achieves a high efficiency of over 94% at nominal voltage, reducing energy loss during the charging process.

How does the liquid cooling system benefit the module?

Liquid cooling provides superior thermal management compared to air cooling, allowing the module to operate reliably within a -40 to 85°C range even under high loads, while maintaining an IP67 protection rating.

What vehicle types are compatible with these control units?

The system is highly versatile, supporting everything from light 2.5-ton vans to 55-ton heavy trucks, as well as passenger buses, sanitation vehicles, and marine applications.

Does the charger support communication with the vehicle's BMS?

Yes, it utilizes standard CAN-BUS communication for seamless interaction with the Battery Management System (BMS) and Vehicle Control Unit (VCU), supporting features like low-voltage wake-up.

What safety protections are integrated into the design?

The charger includes comprehensive redundant protections, including Input/Output Over-Voltage (OVP), Under-Voltage (UVP), Over-Temperature (OTP), Over-Current (OCP), and short circuit protection.

Can the software be updated after installation?

Yes, the module features a full digital software design that supports on-line upgrades and remote fault diagnosis for easier maintenance.