Great news! BatterySpace.com now offer Battery Management System (BMS-LC24) Li-Ion battery pack up to 88.8V (24 Li-Ion modules of 3.7V in series) with Max. 500A rate. BMS-LC24 is a state of the art battery management system for battery powers for EV, solar car, Robotics & etc.,

BMS-LC24 consists of one Master Module, coupled upto 24 individual Slave Modules. Each slave module control a 3.7V single cell or group of 3.7V of parallel lithium cells, with two 500A rated solid relays. The BMS-LC24 aggregates cell data and coordinates cell balancing. Outputs are provided to control solid relays to perform protection functions. All battery data is available via RS-232 in viewing format, making this BMS an excellent choice for logging and battery system development. By combining multi BMS-LC24, you can built and manage a Li-Ion battery pack for as high a voltage as you want.

• Please click here to download user manual
• Please click here to view diagram: How to build 144V Li-Ion battery combine with 2 series of BMS Module
• Please click here to view diagram: How to build 266.4V Li-Ion battery combine with 3 series of BMS Module

Features and Specifications of Master Module:

• Relay ( contactor ) Operating Voltage: 8-32VDC to run solid relay - not included (you may click here to order a 11.1V . 4Ah Li-Ion pack to operate the relay)
• Internal Fuse: 5A Fast Acting, 1/4" x 1 1/4"
• Typical Supply Current: 15mA (not including Solid Relay consumption)
• Size (LxWxH): 12.00" (305mm) x 4.87" (124mm) x1.20" (31mm) (w/o relay), supplied as PCB.
  • Note: the height is determine by the relay being use! With 500A relay: the height is: 2.82"
• Weight (w/o relays): 12oz (345g).
• Innovative balancing function to reduce capacity mismatch on each 3.7V module and increase battery pack service life.
• Simultaneous sampling of all cell voltages for insensitivity to current draw
• Fully isolated from cells
• Each Master Module can handle 2-24 Li-Ion 3.7V Slave Module ( up to 24 modules , e.g 88.8V Pack ) with 500A Max. charging / discharging
• Separate Outputs for charge and discharge contactors
• Audible warning codes for different faulty conditions (BMS will cut off when battery is above or below normal voltage, high temperature or wrong polarity)
• Automatic recovery from faulty conditions
• Factory configured for Li-Ion cells of Lithium-Cobalt or Li-Mn-Ni Cathode
• Slave Module - each module handles one 3.7V cell or group of parallel cells. Upto 24 Slave Modules per Master Module for 88.8V ( please order individual slave module separately at related product section below )
• Two 500A EV-200 solid relays (contactors) are included on the Master Module and can remove from the board and put on any desired location if you have a height limitation:
  • Relay Type: Tyco EV200AAANA
  • Coil Voltage: 9-36VDC
• Each module's data is available via RS-232 (CAN or Optional RS-485) . See Example BMS-LC24 Data Output below

Cell voltage is reported in mV, and cell temperature in 10ths of a degree C. This data maybe logged on a computer running HyperTerminal, etc. or used directly by other system components.
cycle counter: 0x00000C79
Cell Temp Volt Flag
0000 0218 3079 10
0001 0231 3083 10
0002 0231 3091 10
0003 0218 3075 10
Flags: C:-- F:0000->0000 E:15->15->15
cycle counter: 0x00000C7A
Cell Temp Volt Flag
0000 0218 3079 10
0001 0231 3082 10
0002 0231 3090 10
0003 0218 3075 10
Flags: C:-- F:0000->0000 E:15->15->15

• Functions for protection ( for one Slave Module )
  • Cut-off charging power if any cell or group voltage beyond 4.2V, and auto-recover if below 4.2V
  • Cut-off charging power if any cell or group temperature beyond 60^oC, and auto recover if temperature below 60^oC
  • Cut-off discharging power if any cell or group 's voltage below 3.2V, and auto-recover if voltage > 3.2V
  • Warning: no protection on Max. charging / discharging current. You must control charging / discharging current based on battery cell or group's specification via relay and with appropriate external fuse (not included)
• Charger is not included. You can choose precision DC power supply 0- 105V (10A) in related product below as a charger
  • Charging voltage must be set up correctly for safe charging:
    • Power supply voltage = 4.2V x number of cells or group . Example 51.8V pack, charger voltage shall > 58.8V
    • Max. current in DC power supply shall same as Max. charging current specified by Li-Ion battery
    • In order to charge 89V battery pack, charging voltage shall be 100.8V. You need connect two 0-60V DC power supplies in in series to achieve such high DC voltage.
• Please click picture below to see some example how to build battery pack using BMS

Applications:

• Electric Vehicle
• Hybrid and Plug-in Hybrid Car
• Robotics
• Solar Car
• Power for Remote Monitoring
• Anything that needs to go faster, farther, higher, deeper, lighter, or longer

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