BTMS
Comet Fans BTMS systems are designed for the thermal management of traction batteries in electric rail vehicles, ensuring operational safety, energy efficiency and battery pack service life. Their purpose is to keep temperature within optimal limits, preventing overheating and ensuring consistent performance even under demanding environmental conditions. These systems comply with the most stringent rail industry regulations regarding safety, vibration and fire resistance.
Comet Fans BTMS units are designed to ensure optimal thermal control of the lithium batteries installed on rail vehicles, ensuring reliable performance and safety throughout the train’s operational cycle.
Main Functions
Constant thermal regulation: Keeps the coolant temperature stable throughout all mission phases, from charging to running.
Gestione in condizioni estreme: Progettati per operare in ambienti con temperature elevate e variabili, garantendo sempre il corretto comportamento termico.
Advanced diagnostics: Reliable, redundant monitoring system to prevent faults and ensure continuity of service.
Integrated communication: CAN bus interface for smooth train-level management, with configurable controls.
Technical Characteristics
- Compact and lightweight: Optimised structure to reduce weight and footprint, with customisable layout.
- Application dedicated to the rail sector: Not derived from automotive solutions, but developed to rail industry standards.
- Regulatory compliance: Designed in accordance with the main rail industry standards, including:
- EN 61373 (Shock and vibration)
- EN 45545 (Fire protection)
- EN 50155 (Electronic equipment)
- EN 50121 (Electromagnetic compatibility)
- EN 50126 (RAMS)
Locomotives
- Diesel
- Diesel/Electric
- Electrical
- Shunting
Multiple Units (MU)
- Diesel
- Diesel/Electric
- Electrical
Trams (battery-driven platforms)
High-Speed Trains
Diagnostic Vehicles
BEMU (Battery Electric Multiple Units)
Installation configurations
- Above the battery rack (roof-mounted)
- Underframe
- Inside the carriage (inside car)
- Roof or side-of-train mounting, depending on space and layout requirements
Adaptability features
- Compatible with various battery pack configurations
- Compact, modular layouts for space constraints
- Versions with air filters, passive loop and longitudinal ventilation for installations close to other equipment
Thermal Performance
- Cooling power: 3kW, 6kW, 9kW, 12kW (nominal conditions: air 40°C / liquid 20°C)
- Heating power: 4kW, 8kW, 11kW, 14kW
- Target liquid temperature: 18°C
- Ambient temperature range: from -25°C to +45°C
Liquid Circuit
- Nominal flow rate: from 10 to 48 L/min (variable depending on version)
- Total liquid volume: 36 ÷ 55L
- External pressure losses: 0.3 ÷ 1.2 bar
- Liquid type: water/glycol (antifreeze mixture compliant with rail industry specifications)
- Flow management: pump with automatic control, flow and temperature sensors, bypass valves to optimise heat exchange
Mechanical Characteristics
Weight: 110 ÷ 200kg (depending on configuration)
Indicative dimensions:
- Underframe: 2020 × 700 × 450mm
- Inside car: 1500 × 1400 × 350mm
- Roof: 1330 × 600 × 385mm
- Installation position: horizontal (roof-mounted, underframe, inside car)
Components and Control
- High-efficiency scroll compressors
- Rail-proven EC/AC fans
- Magnetic or hermetic pumps
- Temperature, pressure and flow sensors
- Control unit with dedicated software and CAN bus interface
- Software functions: automatic regulation, alarm management (e.g. TOOHOT, WATERFLOWH/LOW), operating modes (AUTO/OFF), boost heating/cooling
Options and Variants
- Passive loop for reduced consumption
- Air filters for dusty environments
- Longitudinal ventilation for confined spaces
- Modular configurations to adapt to different rail platforms
