The EFDR series skirt-mounted battery thermal management unit can be flexibly arranged (on chassis or frame) and its height is consistent with that of mainstream batteries. It is applied to various battery swapping/charging heavy-duty trucks, pure electric sanitation vehicles, construction machinery, and more. The unit features an aluminum alloy frame structure for weight reduction and efficiency improvement.It can be optionally equipped with a PTC liquid heater and has standby, cooling, heating, and self-circulation working modes.It uses CAN bus communication, has fault self-diagnosis capabilities, and can upload real-time operating status and fault information.Its EMC meets the requirements of Level III.