--- title: "Qualification" canonical: "https://anchor.is/the-hysteresis/issue/5/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/5/qualification" issue: 5 section: "qualification" description: "Pack-level requirements, test conditions, and standards by application" authors: ["Ronan Adike"] published: 2026-07-12 updated: 2026-07-11 articles: 17 --- # 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 5 — Qualification Pack-level requirements, test conditions, and standards by application ### The Standards Map - [eVTOL/eCOTL Propulsion Battery Qualification Standards Map]() — By [Ronan Adike]() · Published 2026-07-10 · Format: The Standards Map EASA MOC-3 states explicitly that DO-311A's thermal-runaway containment test was developed for batteries powering other aircraft systems or equipment and "did not necessarily consider electric and hybrid aircraft propulsion battery systems." DO-311A remains a necessary input to eVTOL propulsion-battery qualification, but the qualification stack is layered, multi-document, and multi-jurisdiction. This card maps every governing standard, every layered requirement, and every gap across transport eligibility, pack safety, installed-system safety, mission performance, and platform acceptance. The structural finding: EASA has published clause-level test conditions to build against, while the FAA operates through a per-applicant engagement process. Both lanes must close, and they close on different evidence. ### Claim-Type Dashboard Every pack qualification program makes five types of claims: transport eligibility, pack safety, installed-system safety, mission performance, and platform acceptance. The standards backing each claim vary sharply across applications. 6T ground vehicle packs are governed across all five. eVTOL propulsion batteries sit under layered, incomplete, and program-specific frameworks. Humanoid robotics and UUV/subsea are mostly void or working from borrowed adjacent-domain standards that must be labeled as such in every DVP entry. The cards below cross-cut each claim type against five target applications. The pattern they surface: where a standard governs, where a framework is borrowed with known scope limitations, and where the DVP carries the full burden because no public authority exists. Last verified July 4, 2026. - **UN 38.3 Is the Universal Gate, Nothing More** — [Source]() — Published 2026-07-10 Tag: Transport Eligibility 49 CFR 173.185 requires UN 38.3 passage for every lithium battery type before transport. Applies identically across 6T, eVTOL, sUAS, humanoid, and UUV/subsea. Settled and universal. Answers the shipping question only. No bearing on operational safety, abuse tolerance, or installed-system performance. - **Pack Safety Governed in Two Applications, Borrowed Elsewhere** — [Source]() — Published 2026-07-10 Tag: Pack Safety 6T: MIL-PRF-32565 governs. eVTOL: DO-311A/ETSO-C179b as baseline, but EASA's May 2024 white paper confirms no TSO/ETSO covers propulsion batteries. sUAS: ASTM F3005-22 plus IEC 62619 (industrial) or IEC 62133-2 (portable); scope selection matters. Humanoid: IEC 62619 borrowed, label it. UUV/subsea: void. Common error: applying IEC 62133-2 to industrial-class applications. That is a scope category error your reviewer will catch. - **Installed-System Safety Layered for eVTOL, Void Subsea** — [Source]() — Published 2026-07-10 Tag: Installed System 6T: MIL-PRF-32565 covers installed use across SLI, silent watch, and deep cycle. eVTOL: EASA MOC-3/MOC-4/MOC-5 SC-VTOL layer crash-resistance and aircraft-level risk assessment on top of DO-311A. sUAS: EASA DVR pathway for SAIL IV; type certificate required at SAIL V/VI. Humanoid: ISO 13482 provides hazard context for service robots but contains no pack-specific installed criteria. UUV/subsea: void. No public framework addresses installed battery safety for submerged autonomous platforms. - **Mission Performance Standards Exist for 6T Packs Only** — [Source]() — Published 2026-07-10 Tag: Mission Performance 6T: deep-cycle and silent-watch duty profiles are specification-governed under MIL-PRF-32565. eVTOL: C-rate profiles (2.5–4.5C hover, 0.75–1.5C cruise) come from published engineering analyses, not from any governing standard. Cite them as design inputs in your DVP, not requirements. UUV/subsea: pressure envelope, thermal rejection, and acoustic emission constraints are entirely DVP-defined. Humanoid and sUAS: no public pack-level mission acceptance criteria exist. - **Platform Acceptance Settled for 6T, Gated Elsewhere** — [Source]() — Published 2026-07-10 Tag: Platform Acceptance 6T: QPL-32565 listing plus First Article Testing; any cell substitution triggers new FAT. eVTOL: FAA type certification via AC 21.17-4 and EASA special conditions; only two of fourteen programs had issued criteria as of March 2026. sUAS: Blue UAS and DCMA are platform and acquisition vetting mechanisms, not pack-level battery qualification. EASA SORA 2.5 DVR pathway governs UAS operational authorization. Humanoid and UUV/subsea: customer specification is the sole acceptance authority. ### Claim-Type Separation - [Blue UAS Does Not Cover Pack-Level Battery Qualification]() — By [Ronan Adike]() · Published 2026-07-10 Blue UAS listing means a platform passed DCMA vetting across four criteria: cybersecurity, supply chain integrity, system architecture, and operational reliability. Since the [DIU-to-DCMA transition](https://www.diu.mil/latest/dius-blue-uas-list-to-transition-to-dcma) (December 2025, per the July 2025 SecDef memo), the program sits squarely in acquisition compliance. None of the four criteria address pack-level electrochemical safety, thermal runaway propagation, abuse tolerance, or cycle life under any test condition. The [DCMA portal](https://www.diu.mil/blue-uas-cleared-list) exposes no battery cell supplier, chemistry, pack assembler, or BMS fields. FY2020 NDAA Section 848, the program's statutory basis, enumerates flight controllers, radios, cameras, gimbals, GCS, and data storage. Batteries are absent from the list. ### Qualification Hierarchy Literature - **Dynamic Testing of eVTOL Energy Storage Systems: Literature Review and Path Forward** — [Source]() — Published 2026-07-10 NASA audits SAE J2464, DO-311A, UN 38.3, and MIL-STD-810 against eVTOL propulsion ESS crashworthiness needs. None cover primary-propulsion batteries under crash dynamics. Cell quasi-static failure limits run roughly double their dynamic equivalents, breaking any assumption of cell-to-pack test transferability. Emerging domain; no settled standard governs this space. Do cell abuse results transfer to pack crash behavior? No. Dynamic short-circuit thresholds land at roughly half quasi-static values, invalidating the extrapolation. Does DO-311A close the crashworthiness loop? Its 20g, 11 ms crash test was scoped for equipment batteries, not propulsion ESS. The gap remains open. - **Battery Cell-to-Pack Scaling Trends for Electric Aircraft** — [Source]() — Published 2026-07-10 NASA Glenn cross-references seven aviation qualification requirement types against seven governing documents and finds each only partially covers the cell-to-pack hierarchy. Thermal runaway containment and explosion containment mass penalties scale nonlinearly with cell energy density, widening the gap between cell-level benchmarks and pack-level reality. Emerging domain. What does UN 38.3 actually cover at pack level? Crash safety and thermal cycling. It does not address thermal runaway propagation or explosion containment. Why do higher-density cells make pack qualification harder? Concentrated heat loads during runaway drive containment mass up nonlinearly, eroding cell-level energy density gains. - **A Critical Review on the Battery System Reliability of Drone Systems** — [Source]() — Published 2026-07-10 Peer-reviewed survey mapping UAV battery standards fragmentation across UN 38.3, MH/T 6043-2021, and T/CAAC 002-2022. Proposes a five-dimensional reliability framework separating cell-level capacity metrics from system-level MTBF and mission completion rates. Documents the absence of any unified UAV pack qualification standard. Partially settled, partially emerging. What does "qualified" mean for a UAV battery pack? Depends which of three coexisting standards you cite. Each applies different pass/fail criteria. Are the proposed TR thresholds (≥5 min warning, ≥15 min propagation suppression) from a governing standard? No. They are analytical. Label accordingly in DVPs. - **Automotive Battery Pack Standards and Design Characteristics: A Review** — [Source]() — Published 2026-07-10 ArXiv preprint (not peer-reviewed) mapping the full automotive qualification stack: cell-level IEC 62660, pack-level SAE J2464 and UL 2580, vehicle-level FMVSS 305 and ISO 26262 functional safety. Valuable as the reference model for hierarchical qualification logic that eVTOL and UAS programs are currently asked to analogize from. Settled domain. Why include an automotive paper here? Automotive is the most mature multi-level battery qualification hierarchy. Emerging applications borrow its structure without its validation history. How reliable is this source? ArXiv preprint, unreviewed. Useful as a structural template for hierarchy logic, not as a source of thresholds for new applications. ### Claim-Type Separation in Practice - **EASA MOC-4 SC-VTOL Issue 2: DO-311A Alone Does Not Qualify a Propulsion Battery** — [Source]() — Published 2026-07-10 Illuminates the installed-system layer: ETSO C-179b component qualification is necessary but insufficient without aircraft-level risk assessment under MOC-4. - **FAA Special Conditions for Lithium Battery Installations, 2025–2026 Federal Register Filings** — [Source]() — Published 2026-07-10 Illuminates the TSO-to-installation gap: TSO authorization does not satisfy installed-system airworthiness, and each novel battery configuration triggers aircraft-specific conditions. - **FAA TSO Workshop: Component Authorization vs. Installed-System Safety Assessment for Electric Aircraft** — [Source]() — Published 2026-07-10 Illuminates the full compliance stack: presentation separates TSO-C179b component authorization from FHA/SSA/FTA/FMEA installed-system assessment required at the aircraft level. - **SORA 2.5 Now Operative in EU: Battery Design-Verification Scales With SAIL, Not Just Hardware Spec** — [Source]() — Published 2026-07-10 Illuminates operational-risk-driven qualification: EASA's DVR evidence burden ties battery design verification to the SAIL level of the operation, making mission profile a qualification variable. - **MIL-PRF-32565 Lithium 6T: Specification Settled, QPL Still Sparse, Transport Certification Separate** — [Source]() — Published 2026-07-10 Illuminates defense qualification layering: First Article Testing, QPL listing, and naval transport certification are three distinct claims against the same battery, each with its own gate. - **EU Rolling Plan Flags Robotics Battery Standards Gap Under AI Act Implementation** — [Source]() — Published 2026-07-10 Illuminates the named void: European Commission acknowledges no settled pack-level battery qualification framework exists for humanoid service robots at the standards-policy layer. ## Other sections in Issue 5 - [Signal]() - [China]() - [Korea]() - [The Log]() - [Defense]() ## More - [Publication guide]() - [Issue archive]()