Download the BPX Standard

Download the standard and the accompanying parameter descriptions document

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Updates

Updates from version 1.0

  • Model extensions: BPX 1.1 adds explicit support for the SPMe, a one-state hysteresis model, and support for composite electrodes, such as graphite/silicon blends.
  • Degradation: Users of BPX can now specify a degradation state – loss of (accessible) active material (LAM) and loss of (cyclable) lithium inventory (LLI) – enabling the communication of aged cell parameters.
  • Cell state: a new “cell state” has been added to specify the initial state-of-charge, state-of-health, and thermal environment for a specific experiment, improving clarity on how properties relate to a cell or experiment.

Download pack contents

The download pack consists of:

  • The standard BPX specification document
  • The BPX parameter descriptions document
  • Two example files for two cells that are currently available on the open market and which have been professionally parameterised:
    • NMC_pouch_cell: Li-ion battery with lithium nickel manganese cobalt (NMC) positive electrode.
    • LFP_18650_cell: Li-ion battery with lithium iron phosphate (LFP) positive electrode in a cylindrical cell 18650 format.

To enable easy adoption, tools to parse and validate BPX formatted files are provided separately in the BPX GitHub repository.

Using the standard

The Faraday Institution has made the BPX standard freely available to industrial users experienced in the field via this microsite and will continue to work with industry and the research community to improve and evolve the standard.  The Faraday Institution will not assist in, and does not accept any responsibility for, the actual selection and application of the BPX standard by users. All responsibility for selecting, applying, and assessing compliance with the BPX standard lies with the user.

 The BPX standard should only be used by those users who are appropriately experienced, qualified and equipped to do so. It should be applied conscientiously and, where necessary, advice should be taken from others qualified to provide it.

 The Faraday Institution is not liable for any loss or damage whatsoever arising from the misapplication or the use of the BPX Standard by a user.