High-Power Battery Management System Solution Module

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Overview

Introduction

The MBMxxS-P100-x is a complete solution for a 7-cell to 16-cell in series battery management unit with high currents.

This board uses the MP279x ICs, a robust family of battery management analog front-ends (AFEs) that provide a complete AFE monitoring and protection solution. The MP279x supports up to 16 cells in series, and provides two separate analog-to-digital converters (ADCs) for synchronous voltage and current measurements. The high-side MOSFET (HS-FET) driver and robust HW protection functions come with configurable thresholds. Protections include over-current protection (OCP), short-circuit protection (SCP), battery and cell over-voltage protection (OVP), battery and cell under-voltage protection (UVP), over-temperature protection (OTP), and under-temperature protection (UTP). The MP279x also integrates internal balancing FETs to equalize mismatched cells while offering the option to control external FETs for a higher balancing current.

The board also features the MPF4279x, a standalone battery fuel gauge (FG) IC that performs state-of-charge (SoC), time-to-full, time-to-empty, and unavailable energy estimation using a custom battery model obtained through exhaustive characterization and voltage, current, and temperature readings. This solution is fast, simple, and easy to configure through the graphic user interface (GUI). Figure 1 shows the MBMxxS-P100-x block diagram.

Figure 1: MBMxxS-P100-x Block Diagram Design

Each MBMxxS-P100-x solution offer different combinations of the MP279x AFE and the MPF4279x fuel gauge. See the Complete Solutions section on page 5 for more details.

Complete Solutions

Solution MPF4279x Part Number MPF4279x Short Description MP279x Part Number MP279x Short Description
MBM16S-P100 MPF42790 2-Cell to 16-Cell FG with Level LEDs MP2797 7-Cell to 16-Cell BMS with I2C
MBM14S-P100 MPF42790 2-Cell to 14-Cell FG with Level LEDs MP2791 7-Cell to 14-Cell BMS with I2C
MBM10S-P100 MPF42795 2-Cell to 10-Cell FG with Level LEDs MP2791 7-Cell to 14-Cell BMS with I2C
MBM16S-P100-B MPF42791 Next Generation 2-Cell to 16-Cell FG with Level LEDs MP2797 7-Cell to 16-Cell BMS with I2C
MBM14S-P100-B MPF42791 Next Generation 2-Cell to 14-Cell FG with Level LEDs MP2791 7-Cell to 14-Cell BMS with I2C


Kit Contents

MBM16S-P100

Items included with the kit (items below can be ordered separately):

# Part Number Item Quantity
1 BMU16S-P100-R01A MP2797DFP-0001-T and MPF42790DR-0B-0001 or MPF42792-0B-0001 complete solution 1
2 EVKT-USB_RS485/I2C-01 USB to RS-485/I2C adapter 1

MBM14S-P100

Items included with the kit (items below can be ordered separately):

# Part Number Item Quantity
1 BMU14S-P100-R01A MP2791DFP-0001-T and MPF42790DR-0B-0001 complete solution 1
2 EVKT-USB_RS485/I2C-01 USB to RS-485/I2C adapter 1

MBM10S-P100

Items included with the kit (items below can be ordered separately):

# Part Number Item Quantity
1 BMU10S-P100-R01A MP2791DFP-0001-T and MPF42795DR-0B-0001 or MPF42797DR-0B-0001 complete solution 1
2 EVKT-USB_RS485/I2C-01 USB to RS-485/I2C adapter 1

MBM16S-P100-B

Items included with the kit (items below can be ordered separately):

# Part Number Item Quantity
1 BMU16S-P100-B-R01A MP2797DFP-0001-T and MPF42791DR-0B-0001 complete solution 1
2 EVKT-USB_RS485/I2C-01 USB to RS-485/I2C adapter 1

MBM14S-P100-B

Items included with the kit (items below can be ordered separately):

# Part Number Item Quantity
1 BMU14S-P100-B-R01A MP2791DFP-0001-T and MPF42791DR-0B-0001 complete solution 1
2 EVKT-USB_RS485/I2C-01 USB to RS-485/I2C adapter 1


Figure 2: MBMxxS-P100-x Board Set-Up

Features and Benefits

  • High-Side Charge and Discharge (Including Pre-Charge Function) MOSFETs
  • 7 Cells, Up to 16 Cells in Series
  • Up to 100A of Constant Charge/Discharge Current and Up to 150A of Peak Current
  • True Hardware Protections
  • 5V, CAN Bus and UART Availability for External Devices (e.g. Displays)
  • External Fault Indicator LED and Pack Voltage Status LED
  • High-Accuracy Analog-to-Digital Converter (ADC) with the Option of Simultaneous Voltage and Current Measurements
  • Configurable Alarm Reactions and Thresholds:
    • Configurable Over-Voltage Protection (OVP) and Under-Voltage Protection (UVP)
    • Configurable Charge and Discharge Over-Current Protection (OCP) and Short-Circuit Protection (SCP)
    • PCB and Configurable Battery Over-Temperature Protection (OTP)
    • Self-Functionality Test Options
  • Cell-Balancing with Internal MP279x FETs with Option of External Balancing FET for Higher Currents
  • Open-Wire Detection
  • Sleep Mode with Standby Discharge FET for Lower Current Consumption with Automatic Wake-p when a Load/Charger is Detected
  • Load/Charger Detection Option in Safe Mode
  • Accurate Battery Pack State-of-Charge (SoC) Estimate (see Figure 3)
  • Simple Configuration through MPS’s GUI
  • Supports any Lithium-Based Cell Type Using a Dedicated Battery Cell Model

Figure 3: MBM16S-P100 Performance Example


Kit Specifications (1)

Features Specifications
Max series cell supported MBM16S-P100-x: 16 cells in series
MBM14S-P100-x: 14 cells in series
MBM10S-P100-x: 10 cells in series
Battery pack voltage range MBM16S-P100-x: 18V to 70.4V
MBM14S-P100-x: 18V to 65.8V
MBM10S-P100-x: 18V to 44V
Cell voltage range Up to 4.5V (configurable cell UV and OV thresholds)
Charge current range 0A to 196.605A (configurable charge OC threshold) (1)
Discharge current range 0A to 196.605A (configurable discharge OC threshold) (1)
Total high-side protection resistance (connectors + PCB traces + 1 parallel FETs) 4mΩ to 5mΩ
Operating systems supported Windows 7 or later
System requirements Minimum 350MB free
EVB size (L x W) 123mm x 121mm (FETs board)
97mm x 61mm (control board)

Note:
1) It is not recommended to exceed 120A of continuous current for the 10 parallel FET configuration. Up to 150A of peak current is supported.