Available BMS Systems:

• Metric Mind BMS
  • http://www.metricmind.com/bms.htm
  • Hardware done, software not finished

• Reap Systems
  • Based in the UK
  • Each board monitors, manages and equalizes up to 14 cells (14 voltages and 7 temperatures)
  • Multiple boards connected via CAN bus - tested for up to 12 boards per system (168 cells)
  • One system can measure up to 2 currents (Hall effect and/or shunt resistor)
  • Fully independent hardware protection layer (redundant cell protection mechanism)
  • Parameterizable for different cell types and applications
  • SOC, SOH information
  • Fast closed loop controls available for controlling chargers and inverters through CAN bus or PWM
  • CAN bootloader for firmware updates without having to access the electronic modules
  • Supports data logging with PC. Compatible with RS232 or USB, ethernet, bluetooth or wifi via CAN bus converter
  • PC software 'PCTool' available free of charge (specific CAN to USB converter required)
  • RS485 available on hardware (custom firmware only)
  • Can be powered from cells or externally
  • Power down + wake-up function
  • 454.00 GBP per board for orders up to 10 boards (17.07.2009). Volume discounts available.
  • Customizations or custom solutions on offer.

• EV Power Australia's BMS
  • http://ev-power.com.au/-Integrated-Lithium-Battery-Systems-.html

• Lee Hart's battery balancer
  • http://www.geocities.com/sorefeets/balancerland
  • A variation is used by ProEV

• http://autos.groups.yahoo.com/group/EVBMS
  • Open source discussion group
  • >300 members
  • <10 messages / month recently
  • Apparently John Lussmyer has a design there
  • Several designs in the files section

• Manzanita Micro Mk3 (for lead acid)
  • Website
  • Close up picture
  • Designed for my charger
  • Doesn't do lithium
  • Lithium version in the works

• http://groups.google.com/group/freebms
  • Very low traffic
  • Code being committed to subversion http://groups.google.com/group/freebms/browse_thread/thread/b475d1c39a7dbc44
  • Discussion about PIC16F88 and temperature measurement http://groups.google.com/group/freebms/browse_thread/thread/b475d1c39a7dbc44
  • EVBones simple analogue design was donated here, see below

• EVBones BMS
  • Simple analogue clamper
  • Details mirrored here in case they disappear

• Lynch BMS
  • Simple analogue clamper
  • Extensive detail of the design on the website
  • £12.76 for each cell

• 16 cell BMS - from electric bike community (includes questions about 16s12p A123 pack)

• EVSkinAndBones BMS

• http://www.cameronsoftware.com/ev/EV_BatteryManagementSystems.html

• http://www.eaa-phev.org/wiki/BMS

• Blade Electric Vehicles BMS
  • One board per cell
  • ATTiny13V microprocessor controlled
  • Processor powered by the cell, good down to 1.8v
  • No external reset circuit
  • No fuse
  • Doesn't appear to have temperature or bypass current sensors
  • In the future will provide some form of improved communications between cells

• Solarvan/Battery Vehicle Society BMS
  • Open source
  • One board per cell
  • PICAXE cpu
  • Nearly finished
  • Hard to follow progress, have to wade through thread
  • Slave Schematic version 1.65
  • Master Schematic
  • Prototype photo photo photo photo video video

• Elithion
  • Distributed: one cell board per cell
  • One unbalanced wire between adjacent cell boards
  • Cell boards for various sizes of prismatic, small cylindrical, large cylindrical and pouch cells
  • SOC, SOH, CCL, DCL, passive balance, isolation test, fan driver, contactor driver, 3 current sensors
  • CAN bus

• Elithion BMS controller: