The BTMS M2 maintains optimal operating temperature for liquid-cooled traction batteries in BEV, FCEV and stationary power applications,  safeguarding cell life, charge efficiency, and system performance.

Controlled by Grayson’s proprietary thermal logic software via CAN J1939 and managed through the integrated Grayson Intelligent Control Module – the M2 actively regulates cooling, passive cooling, and electrical heating based on real time temperature feedback.

A larger chiller paired with a separately mounted condenser delivers up to 11.5kW of cooling, ideal for heavy-duty cycles and fast-charge conditions. Integrated components include a brushless pump, electric expansion valve, and lightweight header tank for simplified installation.

Supporting up to 900V DC, the M2 is proven globally, offering configurable, high-output performance in extreme climates.

Explore the innovative features that set our thermal systems apart, delivering consistent efficiency and dependable performance in every application.

• High cooling capacity: Condenser-separated design enables up to 11.5kW cooling for high-power battery systems.
• Configurable active, passive cooling, and heating: Delivers tailored thermal control across various duty cycles and operating environments.
• Bespoke temperature set-point and CAN addresses: Factory-configured to each customer’s operating requirements for seamless integration.
• Battery pre-conditioning capability: Electrical heating supports cold-weather performance.
• CAN J1939 control with diagnostics: Plug-and-play integration with diagnostics and firmware updates via bootloader.
• DM1 diagnostics: Real-time fault reporting supports quicker fault resolution.
• Wide high-voltage range: Operates from 420V to 756V DC, with 900V DC capability available, supporting the current and next generation of BEV and FCEV platforms.
• Integrated components for simplified installation: Brushless water pump, lightweight header tank, electric expansion valve, and brushless fan are all housed within the unit.
• Long-life brushless fans and pump, scroll compressor: Delivers high efficiency, low noise, and extended service life for reduced downtime and lower TCO.
• Compact and lightweight design: Optimised for space-constrained installations.
• Validated, homologated, and certified: Fully tested for performance, durability, and compliance, including EMC R10 certification, ensuring suitability for global markets.
• Worldwide aftersales service and product support: Backed by Grayson’s global aftermarket network for parts, technical assistance, and service expertise.
• Global manufacturing capability: Produced across four plants worldwide for supply chain resilience and shorter lead times.

Designed with precision engineering, each component is optimised to deliver efficiency, durability, and compliance with industry standards.

• Cooling capacity: up to 11.5kW @ 40°C ambient, 25°C coolant outlet, 40 l/min flow
• Dimensions: 1340 × 554 × 421 mm (L × W × H)
• Electrical heating capacity: 3.6 kW standard (5 kW optional)
• Voltage range: 600V DC nominal and 756V DC max as standard - 900V DC capability available
• Refrigerant: R134a / R407C (optional)
• Weight: Approx. 74 kg (excluding coolant)
• Control: CAN J1939 control interface with diagnostics
• Mounting: Suitable for roof, chassis, or body mounting

Our product range includes multiple model variations, giving you the flexibility to choose the ideal fit for your vehicle and operational requirements.

• 3A-6725-0A00 - 600V DC: Active Cooling, Passive Cooling and Heating
• 3A-6725-0B00 - 600V DC: Active Cooling and Passive Cooling Only
• 3A-6725-0C00 - 600V DC: Active Cooling and Heating
• 3A-6725-0D00 - 600V DC: Active Cooling Only

*Contact Grayson today to learn more about 900V DC options