The BMS is able to handle up to 11 KW with a maximum working voltage of 60V

Idneo has developed a new battery management system for electric motorcycles of L3-A1 type (vehicles with nominal power up to 11KW) and Light Electric Vehicles (LEV).

The battery management system, also known for its acronym BMS, is able to control and monitor battery packs of up to 60V and different substances: Nickel Cobalt Aluminum (NCA), Nickel Cobalt Manganese (NMC), Lithium Ferro phosphate (LFP) and Lithium Titanate (LTO).

This BMS development, created by Idneo in collaboration with CITCEA-UPC Technological Center, allows the control via semiconductor elements (Power MOSFET), continuous discharge currents from the Battery Pack of 180 A during a 30-minute period, as well as discharge peaks of 270 A that last 10 seconds and 300 A for approximately 3 seconds. With these features, the BMS can consequently be used in all types of light electric vehicles, where electrical safety regulations of maximum working voltage up to 60V are required to be fulfilled.

   

The electronic design allows the equalization of the lithium ion cells by means of a passive system of up to 500 mA per cell, along with all the protective elements required to comply with the strict safety standards of lithium batteries, such as protections against overcurrent, short circuits and overcharge. These are in SMD format that therefore allows us to industrialize this BMS in a complete automated system. External Contactor, fuse or sensor current is not required because all these functions are integrated directly into the BMS.

The Idneo Battery Management System is able to communicate with the rest of components within the electric motorcycle; such as the motor controller, battery charger or instrument cluster by CAN Bus protocol, which is also used by the BMS to incorporate diagnostic functions compatible with ISO 9141-2 OBD protocol, mandatory in Europe since January 2017, for all new motorbikes both those of 2 or 3 wheels.

In addition and to comply with the increasingly demanding standards of functional safety such as ISO 26262 for automotive or ISO 19695 for 2 and 3 wheel vehicles, Idneo has implemented different monitoring and control redundant systems of the most critical parameters of the lithium ion batteries, like cell overvoltage (which can cause the explosion of the battery) as well as battery over current (which can cause the temperature rise of the battery above its functional limit values).

The Idneo BMS has been designed for the European and Asian 2- and 3-wheels market, however it is easily adaptable to other types of applications such as Automotive 48 V Mild Hybrid vehicles or Home Energy Storage Systems.

  • To monitor battery packs of up to 16 cells in series
  • Charge & Discharge rates:

Max. Continuous current: 180 A
Max. Peak current [10s]: 270 A
Max. Peak current [3s]: 300 A

  • Automotive Microcontroller:

AUTOSAR compliant
SW development according to Automotive Spice II
IDNEO Bootloader
CAN BUS communication with Network management:

– CAN Transport protocol ISO 15765-2 (ISO-TP)
– Diagnostics by ISO 14229 (UDS)
– XCP Measurement & Calibration

  • AEC Q-200 SMT MOSFET
  • ISO 26262 Functional safety features:

Redundancy for overvoltage protection (HW level)
Redundancy for overcurrent protection (SW Level)

Written by Alberto Adrià

Aquest projecte compte amb el suport d’ACCIÓ en el marc del programa operatiu FEDER Catalunya 2014-2020.