• EMS-CPU (with CAN) Product Description:

EMS-CPU (with CAN) contains a computer unit which supports CAN communication, a shunt sensor measuring pack current and a cable connecting to sense boards (4-cell strings). The computer unit interfaces to sense boards (daisy chain), shunt sensor and provides alarm outputs, video output and CAN communication output. The computer is powered by a 12V DC source. Sensor boards (which quantity varies with pack size) and an optional LCD screen are sold separately.

• Energy Management System (EMS) Parts Ordering

The following parts need to be ordered based on your battery pack requirement:

  - 1x EMS-CPU (no CAN) OR 1x EMS-CPU (with CAN). The difference between the two CPU systems is without or with CAN communication option. Both systems include a system computer, a shunt sensor for pack current measurement and a cable connecting the CPU to daisy chain of 4-cell strings.
  - A number of EMS-4SB. Each EMS-4SB contains four sense boards connected as a 4-cell string. If you have a 100-cell pack, you will need 25x EMS-4SB strings to be daisy chained together.
  - 1x EMS-LCD (optional). An optional LCD screen for display.

• Energy Management System (EMS) Overview

The Energy Management System is designed for Li-ion battery pack using GBS 40Ah, 60Ah or 100Ah cells. The system components include a CPU, sample boards (connected as a daisy chain), a cable connecting the sample boards to the CPU, a shunt sensor and an optional LCD screen. The features of the Energy Management System are:

  - Designed for battery packs using GBS 40Ah, 60Ah or 100Ah cells
  - A distributed system measuring voltage and temperature of each Li-ion cell
  - Daisy chain connection supporting up to 144 cells
  - Cell balancing
  - Integrated Ground Fault Detection and alarm output
  - Pack voltage measurement
  - Pack SOC calculation
  - Low voltage and high voltage alarm cutoff outputs
  - Optional CAN communication output
  - Composite video output
  - Made in the U.S.A.

• EMS Product Specifications:

  - Items Displayed: Pack voltage, current and capacity on main screen, individual cell number, cell voltage and cell temperature on detail screen(s).
  - CPU Power: 8-20V, 120mA
  - Battery Voltage: 12-500V
  - Number of Cells Supported: up to 144
  - Shunt Input: 500A = 50mV
  - Voltage Resolution: 0.1V
  - Current Resolution: 1A
  - Temperature Range: -99F to +199F or -146 to +92C
  - Video Output: Composite Video, Color, NTSC
  - Measurement Accuracy: <1% of Full Scale
  - Measurement Speed: 3 times per second main screen; 1 time per second detail screen(s).
  - Cell Voltage: 2.00 to 4.50V
  - Balancing Threshold Voltage:3.55V
  - Balancing Current: 0.5A
  - Digital Output Current: 4A Surge for 100mS;2A Continuous
  - Output Delay (default): 30 seconds
  - Ground Fault Detection: 2mA (5000 Ohm/Volt)
  - CPU Size: 144 x 66 x 47 mm
  - Shunt Size: 3.25 x 1.75 x 1.75 in