# BDF Support for EIS **URL:** \ **Category:** BDF & Standards\ **Created:** [February 8, 2026, 1:44am UTC](https://bda.discourse.group/t/bdf-support-for-eis/52 "2026-02-08T01:44:07Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![gabe](https://yyz1.discourse-cdn.com/flex029/user_avatar/bda.discourse.group/gabe/32/5_2.png) [@gabe](https://bda.discourse.group/u/gabe)\ **Post date:** [February 8, 2026, 1:44am UTC](https://bda.discourse.group/t/bdf-support-for-eis/52/1 "2026-02-08T01:44:07Z")
Starting this thread to kick-off the async conversation regarding how we want to support EIS data in BDF. We will have a synchronous conversation regarding BDF at the next BDA Meeting on Tuesday March 3rd 2026 ---
**Author:** ![gabe](https://yyz1.discourse-cdn.com/flex029/user_avatar/bda.discourse.group/gabe/32/5_2.png) [@gabe](https://bda.discourse.group/u/gabe)\ **Post date:** [March 3, 2026, 4:41pm UTC](https://bda.discourse.group/t/bdf-support-for-eis/52/2 "2026-03-03T16:41:42Z")
Related to [EIS columns · Issue #4 · battery-data-alliance/battery-data-format · GitHub](https://github.com/battery-data-alliance/battery-data-format/issues/4) ---
**Author:** ![gabe](https://yyz1.discourse-cdn.com/flex029/user_avatar/bda.discourse.group/gabe/32/5_2.png) [@gabe](https://bda.discourse.group/u/gabe)\ **Post date:** [August 15, 2026, 2:26am UTC](https://bda.discourse.group/t/bdf-support-for-eis/52/3 "2026-08-15T02:26:47Z")
Update since March: the EIS columns from #4 shipped in ontology 1.3.0 (frequency, real/imaginary impedance, |Z|, phase) and the BioLogic .mpr parser in 0.2.0 reads them. We reviewed the PyBOP team’s synthetic EIS data against the ontology: every column maps to an existing term, and PyBOP is adopting BDF-native naming via PyProBE v3, so their files will need no translation. Convention questions (interleaved sweeps vs separate files, where the DC operating point and excitation amplitude live) are being settled with them now, most already have agreement.