What is BPX?
Battery Parameter eXchange (BPX) is an open standard for physics-based Li-ion battery models that has been developed to reduce costs and time-to-market through a common definition of physics-based battery models that can be used widely across industry.
An open modelling standard
The BPX standard defines core battery parameters (e.g., ‘cell’, ‘electrolyte’, ‘separator’, ‘negative electrode’, ‘positive electrode’) the equations that use those parameters, and the reporting of experimental measurements used to validate the reported parameters. The standard sets out a human-readable JSON schema describing the parameters which can be used for Doyle-Fuller-Newman (DFN) and single particle models (SPM) and is designed to be portable between different simulators.
BPX is based on the DFN model and the specific form of that model expressed by the standard is the outcome of a comprehensive review of the physics.
BPX is made freely available as an open standard to reduce fragmentation and support interoperability and data exchange across industry. The aim is to facilitate a collaborative and commercially informed technical roadmap and to drive wide-scale adoption.
A collectively forged standardised modelling methodology will speed the design and optimisation of battery technologies without the costs, ambiguity and complexity associated with proprietary models.
BPX makes it easier for established manufacturers, startups and innovators to access and leverage the accuracy of physics-based models across a broad range of development scenarios.