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3kW Battery Thermal Management System (BTMS)
3kW
Cooling Capacity
DC 400–750V
High Voltage Input
CAN 2.0
Communication
IP67
Protection
Engineered for EV Battery Thermal Management
The EVLINK LDC300HA is a 3kW battery thermal management unit designed for liquid-cooled EV battery systems. It integrates refrigeration, coolant circulation, intelligent ECU control and temperature monitoring to help maintain stable battery operating temperatures under varying vehicle conditions.
With CAN 2.0 communication, PID temperature control, an integrated expansion tank and multiple operating modes, the system is designed for reliable vehicle-level integration and efficient battery cooling.
01 Precise Temperature Control
Self-developed ECU with PID control for precise coolant temperature management
02 Integrated Liquid Cooling
Integrated refrigeration and coolant circulation architecture for EV battery thermal management
03 CAN 2.0 Communication
Supports CAN 2.0 vehicle communication with 250 kbps baud rate
04 Integrated Expansion Tank
Built-in expansion tank with liquid level sensor for simplified system integration
05 Multiple Operating Modes
Supports cooling, self-circulation and standby operating modes
06 Vehicle-Level Integration
High-voltage DC architecture and configurable interfaces for EV battery system integration
Product Configuration
Integrated components and control functions designed for reliable EV battery thermal management
Unit Model
Installation Method
illustrate
LDC300HA
Transverse horizontal
High-voltage DC power supply: 400–750 V DC
Low-voltage DC power supply: Rated 24 V DC
Rated cooling capacity: 3 kW; heating function optional (external)
Proprietary ECU control with precise PID temperature regulation
Built-in expansion tank (includes liquid level sensor)
Unit installation: Side-mounted
Single-circuit cooling: Dedicated control of battery pack temperature
Features sleep mode and one-touch fluid filling
Three operating modes: Cooling / Self-circulation / Standby
Dimensions & Interfaces
Maximum overall dimensions of the unit
Dimensions 556 × 465 × 291 mm
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Unit installation dimensions
Mounting Distance 425 × 307 mm
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Mounting 4 × M8
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Cooling water connection
Coolant Outlet NW16
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Coolant Return NW16
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Drain Port Ø16 mm
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Power interface
High Voltage Input DC 400–750V
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Low Voltage Input DC 24V
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Communication CAN 2.0
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Technical Specifications
Key performance and integration parameters of the 3kW Battery Thermal Management System
| Parameter | Specification | |||
|---|---|---|---|---|
| Model | LDC300HA | |||
| Cooling Capacity | 3 kW | |||
| High Voltage Input | DC 400–750V | |||
| Low Voltage Input | DC 24V | |||
| Communication | CAN 2.0 / 250 kbps | |||
| Pump Capacity | 30 L/min @ 130 kPa | |||
| Cooling Fan | DC 24V / 1 Pc | |||
| Heating Capacity | Optional / External | |||
| Max. HV Input Current | < 8A | |||
| Operating Temperature | -35°C to +60°C | |||
| Storage Temperature | -40°C to +80°C | |||
| Refrigerant | R134a | |||
| Coolant | 50% Ethylene Glycol Solution | |||
| Pressure Resistance | 3.5 Bar | |||
| COP | >2.0 @ L40W18 | |||
| Protection Rating | IP67 | |||
| Noise | <75 dB | |||
| Weight | 24 kg | |||
| Design Life | 10 Years | |||
| Warranty | 3 Years | |||
Electrical interface
Unit High-Voltage Interface
(Cable: 2.5 mm²)
Unit side: Amphenol PL082X-60-2.5
Client side: Amphenol PL182X-61-2.5
PIN 1：HV+
PIN 2：HV-
End-insertion mounting
Unit Low-Voltage
Interface
(Cable: 4 mm²)
Unit side: Tyco AMP
1544334-1
Harness side: Tyco AMP
1544317-1
PIN 1：24V+
PIN 2：24V-
Unit lead wire length:
200mm
Unit Communication
Interface
(Cable: 0.5 mm²)
Unit side: Tyco AMP
282108-1
Harness side: Tyco AMP
282090-1
PIN 1: Reserved
PIN 2: Reserved
PIN 3: Reserved
PIN 4: Reserved
PIN 5: CAN_H
PIN 6: CAN_L
Unit lead wire length:
200mm
Unit Commissioning
Interface
(Cable: 0.5 mm²)
Unit side: Tyco AMP
282104-1
Harness side: Tyco AMP
282080-1
PIN 1：CAN_H
PIN 2：CAN_L
Unit Commissioning
Reserved
Coolant Port
DIN interface (optional)
VDA quick-connect (optional)
How the System Works
How Does a Battery Thermal Management System Work
During battery operation, heat generated by the cells is transferred to the coolant circuit through the battery cold plate. The circulation pump carries the heated coolant to the plate heat exchanger, where the refrigerant absorbs the heat and lowers the coolant temperature. The absorbed heat is then released to the ambient environment through the condenser
- 01 Battery Generates Heat
- 02 Coolant Absorbs Heat
- 03 Pump Circulates Coolant
- 04 Plate Heat Exchanger Transfers Heat
- 05 Condenser Releases Heat
Applications
Electric Commercial Vehicles
Thermal management for battery systems used in electric commercial vehicle platforms.
Electric Buses
Designed for integration with liquid-cooled battery systems in electric bus applications.
Electric Trucks
Supports battery cooling requirements for electric truck thermal management systems.
Special-Purpose EVs
Suitable for EV platforms requiring compact liquid cooling and intelligent thermal control.
Engineering & Customization
Engineered Around Your Vehicle Platform
Different EV platforms require different voltage ranges, coolant interfaces, installation layouts and control strategies. EVLINK provides engineering support for thermal matching, vehicle integration, CAN communication and installation requirements.
OEM / ODM
OEM & ODM Engineering Support
From initial technical evaluation to prototype development and vehicle integration, EVLINK supports OEM and ODM projects with flexible engineering solutions tailored to specific thermal management requirements.
Technical Evaluation
→
Prototype Development
→
Validation
→
Mass Production
FAQ
3kW Battery Thermal Management System FAQs
1. What is a 3kW Battery Thermal Management System?
A 3kW Battery Thermal Management System (BTMS) is an active liquid cooling unit designed to control coolant temperature for electric vehicle battery systems. The LDC300HA provides 3kW rated cooling capacity and integrates coolant circulation, refrigeration cooling, ECU control and CAN communication for vehicle-level battery thermal management.
2. What voltage does the 3kW BTMS support?
The LDC300HA supports a DC400–750V high-voltage input and a DC24V low-voltage input. This voltage range allows the 3kW BTMS to integrate with different high-voltage EV battery platforms, subject to vehicle electrical architecture and system requirements.
3. Does the 3kW Battery Thermal Management System provide heating?
Heating is optional and external on the LDC300HA. The standard unit is designed primarily for 3kW active battery cooling. If battery heating is required for low-temperature operation, the heating configuration should be evaluated separately according to the vehicle platform and thermal requirements.
4. Does the 3kW BTMS support CAN communication?
Yes. The LDC300HA supports CAN 2.0 communication at 250 kbps, enabling communication between the BTMS and the vehicle control system. CAN communication can be used for system control, operating-status monitoring and vehicle-level thermal management coordination.
5. What coolant does the 3kW battery cooling system use?
The specified coolant is a 50% ethylene glycol solution, while the refrigeration circuit uses R134a refrigerant. The system is designed for a pressure resistance of 3.5 bar and provides a rated coolant flow of 30 L/min at 130 kPa.
6. What is the operating temperature range of the 3kW BTMS?
The specified operating temperature range is -35°C to 60°C, with a storage temperature range of -40°C to 80°C. The unit also has an IP67 protection rating, supporting integration into EV platforms operating under demanding environmental conditions.
7. How do I know whether a 3kW Battery Thermal Management System is suitable for my vehicle?
BTMS selection should be based on the actual battery thermal load rather than cooling capacity alone. Engineers should evaluate battery voltage, continuous and peak heat load, coolant flow, ambient temperature, installation space and CAN communication requirements.
If the required continuous cooling load exceeds 3kW, a higher-capacity BTMS should be evaluated.
8. Can the 3kW BTMS be integrated into a custom EV platform?
Yes. Vehicle integration should consider the high-voltage system, coolant loop, mounting space, coolant interfaces and CAN communication requirements. For the LDC300HA, the unit uses NW16 coolant supply and return interfaces and is designed for vehicle-level battery cooling system integration.
For project evaluation, customers should provide the battery voltage, thermal load, coolant requirements, installation space and CAN communication requirements.
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