The system features 14 internal balance switches with a capacity of >300mA for cell balance current, each supporting comprehensive diagnostics. Up to 32 devices can be daisy-chained to manage 448 cells and monitor over 100 temperatures.
The Maxim Integrated MAX17852 14-channel data acquisition system can shut down in the event of a thermal overload by measuring the temperature of its own array. Applications include high-voltage battery banks, electric vehicles (EVs), hybrid electric vehicles (HEVs), battery-powered tools, battery backup systems, and more.
Characteristics
AECQ-100 Grade 1 (-40°C to +125°C)
65V Operating Voltage
Very Low Power Consumption
2mA Standby Mode
2μA Shutdown Mode
Redundant ADC and Comparator Acquisitions
Simultaneous Cell and Busbar Voltage Acquisition
14 Cell Voltage Measurement Channels
1mV Accuracy (3.6V, +25°C)
2mV Accuracy (5°C to +40°C)
4.5mV Accuracy (-40°C to +125°C)
14 Cell Balancing Switches
Software Programmable Balancing Current >300mA
Optimized Driving (AUTOBALSWDIS) and Parking Balancing Modes
Automatic Balancing with Individual Cell Timers
Automatic Balancing by Cell Voltage
Emergency Discharge Mode
Low Noise Current Sense Amplifier
5mA Resolution (Gain = 256)
Four configurable auxiliary inputs for temperature, voltage, or GPIO
Integrated array temperature measurement
Automatic thermal protection
Individually configurable safety alert
Overvoltage, undertemperature, and undervoltage/overtemperature faults
Single cell mismatch alert
Supports ASIL-D requirements for cell voltage, temperature, current, and communication
Selectable UART, dual UART, or SPI interface
Battery management UART protocol
Daisy-chain up to 32 devices
Capacitive isolation of communication port
Up to 2Mps baud rate (auto-sensing)
1.5μs propagation delay (per device)
Packet error checking (PEC)
I2C master
Configurable hardware alert interfaces
Factory-tuned oscillator (no external crystals required)
Unique 32-bit device ID
64-pin LQFP package (10mm x 10mm)
