Benchmarking Modules

What do you need to know when benchmarking modules? This is all part of our thought process so that we can start to pull together the data you need.

Hence, a high level list:

• Dimensions
  • width, length, height
  • weight
  • fixing centres
  • fixing size
• Cells in series and parallel
  • #S #P
• Cell
  • make
  • model
  • nominal capacity
  • nominal voltage
  • nominal energy
  • weight
• Electrical
  • Electrical interconnects between cells
    • cross-section
    • material
  • Voltage sense harness
    • type of harness
      • cable/FPC/FFC
    • V sense type of connection
      • screw/laser weld via SMD tab/ultrasonic weld via SMD tab/direct weld/wirebond/soldered
    • number of sensing points
    • total module voltage
  • Temperature sensors
    • number of sensors
    • type of sensor
    • location of sensors
  • Local BMS control board for sensing
    • functions: temperature, voltage, balancing
    • local capability
    • connections
    • connector
  • Isolation
    • approach to electrical isolation
• Mechanical system to hold all of the cells – for pouch and prismatic cells the module will need to apply pressure over the lifetime of the cells to support their operation.
  • mechanical attachement
    • number of screws
    • kind of screws / joints
    • tolerancing
    • expansion mitigation
  • BOL pre-load
  • EOL load
  • cell expansion design
    • cell expansion thickness
    • cell expansion material
    • location: between every cell/every second cell
  • venting
    • vent locations
    • vent gas management: separated from bus bars/none
  • anti-propagation material
    • between cells/covering cells
    • incorporated with expansion material
• Heating/cooling interface
  • type: passive/active air/liquid/dielectric
  • internal or external
  • area
  • cooling area per cell
• Servicing

This post has been built based on the support and sponsorship from: Thermo Fisher Scientific, Eatron Technologies, About:Energy and Quarto Technical Services.

What have we missed?

What should we look for?

The end result is that this benchmarking modules list will form the basis for our Module Benchmarking pages going forward.