JTT offers a portfolio of battery management system products for electric vehicles including distributed and standalone controllers. Their distributed X series supports up to 240 cells at 1000V with active or passive balancing. The standalone S series supports up to 48 cells at 200V with passive balancing. They also offer an M series monitor module. All products monitor cell voltages and temperatures with safety interlocks and provide cell-level state of charge and capacity estimates. They integrate with vehicle systems and chargers and include monitoring software.

1. JTT Product
Portfolio

2. Overview
Series System Voltage Balancing Additional Features Number of BMS
cells Link
Distributed: 1000V Active Safety HW Interlock, MCU CAN Node ID Up to 240 Yes
X-BCU and 1.5A or Auto-Assignment, Interface for optional
X X-MCUs Passive
250mA
heater/driver/IO boards, Cell Lifetime Data
Logging, Cell based SOC, Cap, ESR < 3%
error
Single 200V Passive Safety HW Interlock, Interface for optional Up to 48 Yes
Standalone 250mA heater/driver/IO boards, Cell Lifetime Data
S Controller Logging, Cell based SOC, Cap, ESR < 3%
error
Distributed: 1000V Passive System based SOC, < 5% error Up to 240 Yes
M X-BCU and
M-MCUs
250mA

3. X-BCU
• Battery Control Unit (Master Controller) for X
and M series module controllers
• 1000V, 240 Series Cells
• Three Safety Relay control with position
feedback
• Pre-charge circuit control
• Dual Range Automotive Current Sensor
• Isolated vehicle CAN communication
• Isolated CAN, power, and digital Interface to off-board DC
charger, or on-board charger
• Battery Isolation Monitoring
• Battery hardware interlock for crash sensor, tilt switch, manual
disconnect, etc.
• Optional Add-On Card communication and power for heaters,
fans, other IO

4. X-MCU PASSIVE
• 12 cell voltage pickups, 11
temperature pickups
• Cell Voltage and Temperature
Safety HW Interlock
• Passive Cell Balancing 250mA
• CAN Node ID Auto assignment
• Cell based SOC, Capacity, Resistance, < 3% error
• Continuous balancing during operation due to cell SOC based
• Cell Lifetime temperature and voltage data logging
• Cell serial number tracking, for troubleshooting and warranty

5. X-MCU ACTIVE
• 12 cell voltage pickups, 12
temperature pickups
• Cell Voltage and Temperature
Safety HW Interlock
• Active Cell Balancing 1.5A
• CAN Node ID Auto assignment
• Cell based SOC, Capacity, Resistance, < 3% error
• Continuous cell balancing during operation based on cell SOC
• Cell Lifetime temperature and voltage data logging
• Cell serial number tracking, for troubleshooting and warranty

6. S-Series
• Stand alone low
voltage controllers
(<200V)
• Monitor up to 48 Cells
• Safety HW Interlocks
• Monitor Voltage and temperature for each cell
• Passive Balancing 250mA
• Relay Control, Dual Range Automotive Current Sensor
• Isolated CAN, Isolated RS-232, CAN Diagnostic
• Additional Digital and Analog I/O
• Cell based SOC, Capacity, Resistance, < 3% error
• Continuous cell balancing during operation based on cell SOC
• Cell Lifetime temperature and voltage data logging
• Cell serial number tracking, for troubleshooting and warranty

7. M-Series MCU
• M Series monitor up to
48 cells
• Works with X-BCU
• Cost effective data
acquisition modules
• Small size, low profile
• Temperature pickup for every 3rd cell
• Passive balancing 250 mA
• System level SOC calculation
• Power and Isolated CAN in and out for simple wire harness

8. ACCESSORIES
• LCD, Relays, Current Sensor, Wire Harness, Temperature
Sensors

9. System Integration
• Communicate with and control off-board DC
chargers, and on-board chargers.
• Compatible with standard motor controllers for
CAN and digital communication.
• Can use any customers proprietary HCU CAN or
RS-232 communication protocol

10. BMS LINK
• Monitor and Diagnose problems in the Battery Pack from your PC or
Laptop in real time.
• BMS Link is compatible with all JTT BMS products
• The most comprehensive, battery integrated monitoring, logging and
control software
• Windows (XP, 7)
• Multi-page layout for displaying battery data in numerical and
graphical form.
• Cell voltages, temperatures, SOC, SOH, cell DCRs, balancing status,
alarm status, battery voltage, battery current, and more available in
real time.
• Service Mode available for additional data, and forcing all battery
components such as fans, heaters, relays, cell balancing on and off.
• Controller identification by serial number and firmware version.
• Cell identification and tracking by serial number and cell lifetime data
for warranty and troubleshooting.
• Record, save, and analyze data log files
• Updates with all cell and battery pack information every 100ms
• Alarm status information for all controllers within the battery