Download: 3 in 1 1.8KW DC/DC converter+6.6KW OBC
+ PDU Liquid Cooled System
Model No.: AT3-D1K8C6K6-D14C350-W
1. Summary
1.1 Abstract
This product is three-in-one assembly of a bi-directional on-board charger and a DC/DC
converter and Power Distribution Unit developed for electric vehicles. It has the
characteristics of high integration and high power density. The on-board charger (OBC)
obtains energy from 220V AC power supply to charge the high-voltage power battery in the
vehicle. During the charging process, the power battery management system monitors the
charging status in real time. OBC responds to the voltage and current commands given by
BMS, and carries out state feedback to realize self-diagnosis. In addition, the OBC also has
the bi-directional inverter function, which can output 220V AC voltage to supply power to
equipment with different characteristics. The main function of DC/DC is to convert the high
voltage DC of the power battery pack into 13.8V low voltage DC to supply power to the
automobile accessory system.
1.3 Introduction to main functions of the system
1.3.1 OBC module function
Conduct constant current and constant voltage charging of the battery in different states
within the adjustable range according to the BMS instruction;
According to BMS instructions, the OBC can charge also resistive load with different
power requirements within the adjustable range to realize battery heating;
Carry out AC inverter output within a certain voltage range to supply AC load according to
BMS instruction;
It can realize the diagnosis, self-check and protection functions of the OBC module
according to the CAN information of the whole vehicle and the information monitored by
itself;
1.3.2 DC-DC Converter Function
DC / DC is mainly used to convert high voltage DC of power battery into low voltage DC to
charge 12V battery and supply power to low-voltage electrical appliances in the car.
The main functions include: power adjustment function, on and off control function,
temperature detection function, current power supply detection function, CAN
communication function, Bootloader program brush and UDS diagnosis function, fault
handling function, self-maintenance function and energy saving/ sleep function.
1.3.3 PDU Function
Power distribution for the vehicle high voltage power equipment (air conditioning, PTC,
OBC & DC / DC), integrated PTC relay, bus-bar, each high voltage module insurance, etc.
1.3.4 Cooling Method
Liquid-cooled
1.3.5 User Diagnostic Support
It can realize the functional diagnosis of OBC and DCDC and report to the vehicle system.
It can also realize offline writing by remote brushing program to reduce after-sales
maintenance costs.
1.3.6 Self-diagnosis and multiple protection functions
With self-diagnosis, input and output overvoltage, under voltage protection, output shortcircuit
protection, hardware fault protection, over temperature protection and recovery functions;