Name: 8kW BTMS | Electric Vehicle Battery Thermal Management Solutions
Brand: GUCHEN
Rating: 5 (5 reviews)

8kW Battery Thermal Management System for Commercial Electric Vehicles

Guchen 8kW Battery Thermal Management System (BTMS) is an independent and modular liquid cooling solution designed for power battery packs requiring up to 8kW cooling capacity. You can apply this system to various new energy vehicles, including electric buses, heavy-duty trucks, and other commercial vehicles.

With vapor compression refrigeration technology, the BTMS cools the coolant and transfers heat away from the battery pack through coolant circulation, helping you maintain the battery within an optimal temperature range under different operating conditions.

The system supports multiple operating modes, including:

Cooling Mode: The compressor and coolant circulation system work together to reduce battery temperature, helping prevent overheating during high-temperature operation or high-power charging and discharging.

Self-Circulation Mode: The water pump circulates coolant without compressor operation, providing efficient cooling under low thermal load conditions.

Intelligent Control: Through CAN communication with the BMS, the system automatically adjusts compressor, fan, and water pump operation according to battery conditions for efficient thermal management.►

How the 8kW Battery Thermal Management System Works

► Efficient Liquid Cooling The 8kW BTMS uses vapor compression refrigeration technology to cool the coolant. The coolant then circulates through the battery pack, efficiently removing heat and maintaining an optimal battery operating temperature.

►Intelligent Operating Modes The system automatically switches between Cooling Mode, Self-Circulation Mode, and Standby Mode according to battery thermal requirements, improving cooling efficiency while reducing unnecessary power consumption.

►CAN-Based Intelligent Control Through CAN communication with the Battery Management System (BMS), the controller automatically adjusts compressor, fan, and water pump operation to achieve efficient and reliable battery thermal management.

8KW Battery thermal management system technical parameters

Model		GC08-CS01
Working Temperature		-15-60℃
Net weight of single unit		≤55kg (without coolant)
Coolant		50% ethylene glycol/water solution
Overall Dimension		853(L)577(W)285(H)
Rated input power		≤3.5kW
Noise		≤78dB
Waterproof grade		The whole machine meets IP27, and the high-voltage part meets IP67.
Flame retardant grade		Horizontal combustion HB grade, vertical combustion V-0 grade
Insulation voltage		1000VDC
Insulation resistance		>100MΩ
Cooling Capacity		8.0kW
Piping interface		Outlet: O.D. 25mm, Return: O.D. 25mm
Refrigerant Circuit	Refrigerant	R134a
	Compressor	Electric compressor, adjustable speed control
	Condenser	Parallel flow
	Electronic fan	PWM control, adjustable power, Pmax≤ 300W (single fan)
	Plate heat exchanger	Stainless steel plate heat exchanger
	Throttling device	Thermal expansion valve
	System pressure resistance	4.5MPa
Temperature sensor	Sensors	Thermistors
	Measuring range	Outgoing and incoming water -10～105℃
	Measuring range	Ambient temperature -40～105°C
	Measuring range	Exhaust temperature -40～150°C
	Control Precision	≦±1℃
Controller	Chip	GD32F105、Pmax≤15W
	Communication Protocol	CAN2.0
	Baud rate	250/500
Case color		Black/Silver
High voltage power supply (working voltage)		230~420 VDC 400~750 VDC 600V~950VDC (voltage range adjustable
Low-voltage power supply (working voltage)		18V-32V
Coolant Circuit	Coolant	50% ethylene glycol aqueous solution (1:1 volume ratio)
	Pipe material	CU
	Pipe connection type	Clamp
	Pressure resistance of pipeline	≥5bar
	Pipe outer diameter	Unit side 25mm
	Electronic water pump	Lift ≥20m, rated power 240W

Unique design of battery thermal management system

Integrated System Components

The 8kW Battery Thermal Management System integrates key components including a compressor, water pump, plate heat exchanger, condenser, expansion valve, controller, temperature sensors, and high- and low-voltage wiring harnesses. The integrated design combines cooling, circulation, and control functions into one compact unit, providing reliable thermal management for electric vehicle battery packs.

Water Pump Performance

This chart illustrates the relationship between flow rate, head, and power for the water pump used in an 8 kW battery thermal management system.

8kw BTMS water pump

Compact Design and Dimensions

Detailed view of the Guchen BTMS unit with overall dimensions and interface positions for installation reference

8KW BTMS Showcase Figures

Guchen electric compressor used on 8KW BTMS

Guchen 66CC 600V Electric Compressor used on 8KW BTMS
Heat exchanger on 8KW BTMS

Intelligent Control Features

♦ Optional PTC Heater – Supports Standby, Cooling, Heating, and Self-Circulation modes.

♦ CAN 2.0 Communication – Enables seamless communication with the BMS.

♦ Network Control – Supports networked operation and centralized management.

♦ Self-Diagnostics – Automatically detects and reports system faults.

♦ Real-Time Power Monitoring – Continuously monitors and uploads operating data.

♦ EMC Class III – Designed to meet EMC Class III requirements.

♦ Lightweight Design – Unit weight: 50 ± 2 kg.

8kW BTMS | Electric Vehicle Battery Thermal Management Solutions

8kW Battery Thermal Management System for Commercial Electric Vehicles

How the 8kW Battery Thermal Management System Works

8KW Battery thermal management system technical parameters

Unique design of battery thermal management system

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