MKBMS Master Board ( MKBMS-LV Master Mini ) Features:
- With charger voltage measurement, humidity sensor, isolated on-board 5V power supply for isolating CAN bus interface and USB Type-C
- 30V to 150V operation
- Voltages measurements for load & battery pack
- Bi-directional current monitoring (up to 2500A pulsed, 500A continuous)
- Isolated charger detection circuit
- Isolated CAN bus interface
- Daisychain Master/Slave ISOSPI communication
- Single PCB pattern for bolt-on contactor
- It can internal power supply or external power supply voltage is 12V
- Integrated predischarge circuit
- USB & serial interface for configuring and firmware upgrades with the ENNOID-BMS-Tool
- OLED display output
- ON/OFF toggle switch input
- SWD burn debugging or update firmware interface
MKBMS Slave Board (LTC6811-12W-AL) Features:
- MKBMS slave board is made of aluminum base plate, which has better heat dissipation effect.
- Scalable & isolated 1000VDC+
- Compatible with MKBMS Master boards
- From 5 to 18 cell levels monitoring per board
- Daisychain Master/Slave ISOSPI communication
- Parameters fully programmable through an easy to use graphical user interface
- 33 ohm balance resistors (0.125A capacity) on all channels
- Self powered by monitored cells
- 1.2mV accuracy, -40 to 120C operation
- Extra low power consumption (Sleep mode = 6uA)
- Molex SL horizontal connectors for balance & temperature. (Comes with male, female + crimps)
Variant:
LTC6811 : Up to 12 cells voltage monitoring & 1+4 temperature sensors* per slave
LTC6812 : Up to 15 cells voltage monitoring & 1+8 temperature sensors* per slave
LTC6813 : Up to 18 cells voltage monitoring & 1+8 temperature sensors* per slave
*The first temperature channel is used by slave board itself.
The following 4 or 8 temperature sensors are not in the package lists
but means an interface to connect 4 temp sensors at most
or to connect 8 temp sensors at most.
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Pack configuration examples:
MKBMS monitoring 23S pack :
2 x LTC6811-12S : 12S + 11S ( Optimal)
2 x LTC6812-15S : 12S + 11S (Two slaves partially loaded)
2 x LTC6813-18S : 12S + 11S (Two slaves partially loaded)
MKBMS monitoring 27S pack :
3 x LTC6811-12S: 9S + 9S + 9S (Three slaves partially loaded)
2 x LTC6812-15S: 14S + 13S (Optimal)
2 x LTC6813-18S: 14S + 13S (Two slaves partially loaded)
MKBMS monitoring 29S pack :
3 x LTC6811-12S: 10S + 10S + 9S (Three slaves partially loaded)
2 x LTC6812-15S: 15S + 14S ( Optimal)
2 x LTC6813-18S: 15S + 14S (Two slaves partially loaded)
MKBMS monitoring 30S pack :
3 x LTC6811-12S: 10S + 10S + 10S (Three slaves partially loaded)
2 x LTC6812-15S: 15S + 15S ( Optimal)
2 x LTC6813-18S: 15S + 15S (Two slaves partially loaded)
MKBMS monitoring 35S pack :
3 x LTC6811-12S: 12S+12S+11S (Good)
3 x LTC6812-15S: 12S+12S+11S (Three slaves partially loaded)
2 x LTC6813-18S: 18S + 17S (Optimal choice)
*For uneven cell count in series, only the last slave board in the daisy-chained loop should have one cell less connected than the other slaves. Ex: 39S = 10S + 10S + 10S + 9S
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