--- title: "Qualification" canonical: "https://anchor.is/the-hysteresis/issue/12/qualification" publication: "The Hysteresis" publisher: "The Hysteresis" language: "en-US" guide: "https://anchor.is/the-hysteresis/llms.txt" permalink: "https://anchor.is/the-hysteresis/issue/12/qualification" issue: 12 section: "qualification" description: "Pack-level requirements, test conditions, and standards by application" authors: ["Ronan Adike"] published: 2026-08-31 updated: 2026-08-29 articles: 18 --- # The Hysteresis > The Hysteresis exists to give a small cross-functional team — strategy, investment, and procurement — a shared weekly instrument for reading the battery supply chain earlier than consensus. Success means the team consistently identifies inflection points in cell pricing, supplier health, and policy enforcement weeks or months before they surface in earnings calls, annual surveys, or trade press. The commercial mechanism is internal-first: the publication proves itself as a decision tool inside the organization, then extends to paid subscribers and a practitioner community as upside. Revenue follows utility — if the team makes better-timed procurement calls and competitive assessments because of what they read here, the publication earned its place. [Read on the website]() ## Issue 12 — Qualification Pack-level requirements, test conditions, and standards by application ### Standards Map - [eVTOL / Powered-Lift Evidence-Boundary Map]() — By [Ronan Adike]() · Published 2026-08-28 · Format: The Standards Map A DVP row citing DO-311A or MOC-3 reads as authoritative. Whether it represents what was actually demonstrated depends on conditioning detail that routinely drops out during transcription — trigger method, SOC, article age, population coverage. This card maps five eVTOL qualification evidence sources: what each test establishes, what it excludes, and which fields have to reach the DVP row intact. The standards landscape was mapped in the prior card; the problem here is evidence that implies more coverage than it delivers. ### Evidence Type Cards "Thermal-runaway test," "drop test," "vibration test" — each names a physical activity. The DVP row requires more: the specific claim the evidence supports, the conditioning under which it was generated, and where the claim boundary sits. These eight cards map common evidence types to their actual scope — what the result demonstrates, what it leaves open, the inflation pattern that appears when results compress into summary tables, and the conditioning that must stay attached to the DVP entry. Conditioning — SOC at trigger, article age, ambient temperature, installed configuration — is what makes a test result a specific piece of evidence. Strip it and the result loses traceability. - **IEC 62619 Propagation Pass Is Not Aviation Acceptance** — [Source]() — Published 2026-08-28 Tag: Thermal Runaway IEC 62619:2022 Clause 7.3.3 verifies no propagation beyond the system boundary under a defined trigger. EASA MOC-3 adds worst-case cell characterization, multi-cell CSFL evidence, and 8-hour post-event monitoring. Inflation pattern: citing DO-311A alone as eVTOL acceptance while omitting the MOC framework. Preserve trigger method, SOC, article age, and ambient temperature with the result. - **Zero-SOC Drop Articles Cannot Close Energetic Claims** — [Source]() — Published 2026-08-28 Tag: Crash Drop EASA VTOL.2325(a)(4) requires ESS drop from at least 15.2 m in the most critical crash condition. IEC 62619's 1.2 m free-fall covers handling survival. Inflation pattern: zero-SOC drops presented as crash evidence, removing the electrochemical energy that drives venting and fire. Preserve SOC, module orientation, and mounting state. - **ABS Depth Test Leaves Pressure Profile Undefined** — [Source]() — Published 2026-08-28 Tag: Pressure Demonstration ABS §10/11.5.6 requires pressure testing to design depth with satisfactory BMS operation demonstrated to the Surveyor. It specifies no multiplier, ramp rate, hold time, SOC, or numeric acceptance criterion — all are DVP-defined. Inflation: "ABS pressure tested" without disclosing that every parameter was internally set. Label each value with its decision owner. - **MIL-STD-810H Without Method and Procedure Is Unusable** — [Source]() — Published 2026-08-28 Tag: Vibration Mechanical MIL-STD-810H defines vibration PSDs and shock procedures by platform category. Without the exact method, procedure, and category — e.g., Method 514.8, Procedure I, Category 24 — the claim is untraceable. Inflation pattern: citing the top-level standard without specifying the profile actually tested. SAE J2380 road-load profiles do not transfer to aviation or robotics platforms. - **External Short and Internal Short Are Separate Rows** — [Source]() — Published 2026-08-28 Tag: Electrical Abuse IEC 62619 Clause 7 external short-circuit tests characterize terminal-path abuse. Internal-short events fall under the propagation test (Clause 7.3.3) — different hazard, different evidence. Inflation pattern: closing both rows with one report. BMS protection verified at nominal conditions does not cover degraded-sensor or post-update states. Preserve BMS configuration and fault state. - **No Standard Sets Universal Cycle Life Thresholds** — [Source]() — Published 2026-08-28 Tag: Cycle Life IEC 62619 temperature cycling (200 cycles, −20°C to +60°C, ≥90% retention) verifies thermal-excursion stability. It sets no application cycle-life requirement. The 80% capacity retention convention carries engineering precedent but no governing authority across eVTOL, UAS, humanoid, or UUV programs. Inflation: presenting 80% as standard-mandated. Cycle-life criteria are program-defined — preserve DOD, C-rate, temperature, and rest intervals. - **UN 38.3 Proves Transport Eligibility Not Operational Safety** — [Source]() — Published 2026-08-28 Tag: Transport Eligibility UN 38.3 Rev. 8 + Amendment 1 establishes that a battery type may be transported in commerce. T3 vibration is a 3-hour sine sweep for shipping conditions. T5 external short at 57°C covers cargo-hold scenarios. Inflation: "UN 38.3 certified" cited as operational qualification. Transport eligibility and operational sufficiency are separate DVP entries. - **UL Product Listings Do Not Qualify Battery Packs** — [Source]() — Published 2026-08-28 Tag: End-Product Safety UL 3030 covers electrical safety for outdoor commercial UAS below 25 kg and ≤100 Vdc — excludes airworthiness and safe-landing capability. UL 3300 (August 2026 revision) added stability and AI safety-function tests but no propagation or cycle-life requirements. Inflation: presenting a UL listing as pack qualification. Listings cover the integrated product, not the pack. ### Worked Evidence Examples - **Predicting Battery Degradation for eVTOL Aircraft: Methods, Challenges, and Future Trends** — [Source]() — Published 2026-08-28 Coupled electrochemical-thermal modeling of two commercial cells under eVTOL duty cycles identifies capacity fade, power capability, and safety margin as three independent end-of-life criteria binding at different SOH levels. One high-energy cell hit power-limit EoL at 96% SOH. Twenty-five percent of high-energy cells failed power requirements at beginning of life. DVP consequence? A single "SOH retirement" row collapses three failure criteria that bind independently. Capacity, power capability, and safety limit each require a separate acceptance line. Evidence tier? Tier 3 model outputs for specific commercial cells. These are not thresholds from FAA, EASA, or RTCA governing documents. Cite accordingly. - **Dynamic Drop Testing of eVTOL Energy Storage Systems Part 2: Deformation and Post-Test Forensics Results** — [Source]() — Published 2026-08-28 NASA Langley drop-tested four EPS EPIC modules from 50 ft across four orientations, producing damage rubric scores from 137 to 255. All modules were at zero state of charge. No thermal runaway occurred post-impact. Observed punctures and electrode shorts would present ignition-capable conditions at operational SOC. Scope boundary? ZSOC testing establishes mechanical-deformation morphology only. It does not bound charged-pack energetic response, and the authors say so. Generalizability? Phase 1 of a multi-phase NASA/NIAR crashworthiness program. One OEM module, one impact condition. Authors explicitly disclaim certification applicability. ### Worst-Case Characterization - [What MOC-3 Means by "Worst Case" and What the Record Must Preserve]() — By [Ronan Adike]() · Published 2026-08-28 MOC-3 §7.(a)(3)(ii) defines worst case relative to a specific response: the combination of test conditions that maximizes the potential for cell-to-cell propagation at battery system level. The response being maximized is propagation, which is distinct from maximum thermal energy release or maximum gas generation — a cell that produces the most energetic runaway at a given SOC may not produce the highest propagation risk at that SOC if most energy is expelled rather than conducted to neighbors. ### Primary Source Access - **FAA AC 25.1309-1B: Systems-Safety Guidance on Interface Analysis and Common-Cause Failures** — [Source]() — Published 2026-08-28 US guidance requiring installed-system interface analysis, common-cause failure assessment, and cascade logic beyond component-level evidence. - **EASA MOC-3 SC-VTOL Issue 2: Propulsion Battery Thermal Runaway Compliance Paths** — [Source]() — Published 2026-08-28 Limits DO-311A scope for propulsion batteries; defines multi-layer safety architecture and pack-level containment prerequisites. - **EASA Comment Response Document: Rationale for MOC-3 Test Parameters** — [Source]() — Published 2026-08-28 Documents EASA's basis for 8-hour monitoring, 20% cell trigger threshold, and dual non-propagation/containment requirements. - **NASA eVTOL ESS Module Drop-Test Report: Scope and Limitations of Zero-SOC Deformation Data** — [Source]() — Published 2026-08-28 Module-level 50-ft drop tests at zero SOC; generates mechanical deformation data, not charged-pack crash safety evidence. - **ASTM F3005-22: Battery Standard Scope Exclusions for sUAS Applications** — [Source]() — Published 2026-08-28 Section 1.2 excludes installed-system requirements from scope; subordinate to F2910 system-level standard by its own terms. - **UL 3030: UAS Electrical Safety Listing Scope and Its Eight Named Exclusions** — [Source]() — Published 2026-08-28 Excludes mission performance adequacy and safe-landing-after-discharge capability; listing covers electrical safety evaluation only. ## Other sections in Issue 12 - [Signal]() - [China]() - [Korea]() - [The Log]() - [Defense]() ## More - [Publication guide]() - [Issue archive]()