What is the BTMS?

Grayson Battery Thermal Management System (BTMS) has been developed for optimising the temperature of the battery modules for all applications of electric vehicles.

The thermal management system has heat and cool capability to maintain the battery cell temperature within the specified range. The system, controlled by Grayson Thermal Systems smart controller,  reacts to cell temperature. BTMS offers cooling during fast charge periods or high ambient territories. Heating following a period of sustained low ambient in cold climates.

GTS have a standard range of rooftop mounted modules and bespoke integrated systems packaged into the vehicle chassis and body.

DRIVING CONSTANT TEMPERATURE IN THE HOTTEST & COLDEST CLIMATES – WHATEVER THE CONDITION – BTMS STANDS UP TO THE CHALLENGE

Overview

Benefits

  • Flexible bespoke solutions for
    maximum compatibility
  • Plug & play to reduce installation time and
    cost
  • Fully integrated components
    maximising efficiency
  • High capacity heating capability offering
    rapid warm up allowing batteries to reach
    operating temperature quickly
  • Energy saving passive ambient cooling
  • Active refrigerant cooling allowing tropical
    cooling capacity
  • Single unit is capable of thermally managing (or cool/heat) up to a 18m length electric bus’ typical battery packs
  • Supplied fully charged, with fast coolant and
    electrical connection
  • Brushless fans, scroll compressor,
    brushless pump provide long life &
    reliable performance
  • Compact Unit offering 3 step thermal
    management systems – Heating / Passive
    cooling / Active cooling, supplied complete
    with anti-vibration mounts

Features

  • Smart box control logic with CAN standard
  • High quality heavy duty multi connector
  • 400V AC 3 Phase Compressor or 200V
    AC 3 Phase Compressor or 400-720V DC
    Compressor or 24V DC Compressor
  • Built in aluminium header tank with coolant
    level floats switch
  • Refrigerant (R407C (optional R134a)
  • Compact unit with complete thermal
    management system
  • Anti-vibration mounts
  • This system is delivered fully charged, no
    engineer is required on site to fit

Operation

To maximise cell life, the battery manufacturers want to hold the battery at a solid state 25°C (20°C up to 35°C) regardless of ambient temperature, for example heating will operate in ambient of -30°C up to 15°C, Passive cooling will operate in an ambient of 0°C up to 20°C and active cooling will operate in an ambient 20°C up to 40°C (50°C on tropical applications).

Equally the batteries need to rise above 5°C as quickly as possible because they do not operate efficiently below this value.

Grayson have developed a 3 stage battery cooling (Primary Cool) and Heating unit which is a single BTMS for the entire back of batteries.

Technical Specifications

Dimensions

Connections