Acceptance rule (decision up-front): For each inspection lot of EVE LF280K 3.2 V / 280 Ah prismatic LFP cells sourced from China to Ecuador, reject the lot if any sampled cell shows (a) measured discharge capacity < 280 Ah (i.e. < 100% of OEM nominal) on the 1C / 2.5 V cut-off test defined in the EVE LF280K datasheet Rev. 1.5 (2024-03), or (b) AC internal resistance at 1 kHz > 0.30 mΩ (i.e. > EVE typical AC-IR 0.25 mΩ + 20%). Sampling is performed per ISO 2859-1 normal inspection, AQL 1.0, for major electrical attributes. Equipment used in this SOP: EVE LF280K (cell) → typical pack assembly with Sungrow SBR096 HV battery or CATL 280 Ah prismatic modules. Horizon: Q1–Q4 2026 procurement cycle. Limitation: this rule is valid only for lots delivered with the EVE LF280K datasheet Rev. 1.5 or a compatible OEM revision; for other models (CATL 280 Ah, BYD Blade, etc.) re-derive thresholds from that model's datasheet.
| Item | Value |
|---|---|
| Cell model | EVE LF280K (3.2 V / 280 Ah prismatic LFP) |
| OEM reference | EVE LF280K Datasheet Rev. 1.5 (2024-03) |
| Location | Guayaquil, Ecuador (destination port / bonded warehouse) |
| Horizon | Q1–Q4 2026 procurement cycle |
| Capacity pass criterion | ≥ 280 Ah (≥ 100% of nominal) at 1C discharge to 2.5 V |
| AC-IR pass criterion | ≤ 0.30 mΩ at 1 kHz (EVE typical 0.25 mΩ + 20%) |
| Sampling | ISO 2859-1, normal inspection, AQL 1.0 (major electrical) |
| Visual AQL | 2.5 (minor visual defects) |
| Test temperature | 25 °C ± 2 °C (surface, after thermal soak) |
| Charge protocol | 0.5C CC to 3.65 V, then CV to 0.05C cut-off (per LF280K datasheet) |
| Evidence date | 2026-09-21 |
| Limitations | Valid only for EVE LF280K Rev. 1.5; new lots, OEM packaging, intact shock-watch indicators |
Confirm that each received lot of EVE LF280K 3.2 V / 280 Ah prismatic LFP cells meets OEM-rated capacity (≥ 280 Ah) and AC internal resistance (≤ 0.30 mΩ) before the lot is released into warehouse stock or dispatched to a pack assembly line. Scope: prismatic LFP cells of model EVE LF280K (Rev. 1.5) shipped under any Incoterms 2020 rule from a named Chinese supplier to a named consignee in Ecuador. For other LFP models (e.g., CATL 280Ah prismatic, BYD Blade, EVE LF304) the acceptance thresholds in this SOP must be re-derived from that model's OEM datasheet; this SOP does not cover them.
[Claim: The EVE LF280K is a 3.2 V / 280 Ah prismatic LFP cell with typical AC internal resistance ≤ 0.25 mΩ (1 kHz) and nominal capacity 280 Ah. | Src: EVE LF280K Datasheet Rev. 1.5 (2024-03) | URL: https://www.evebattery.com/product/lf280k/ | accessed 2026-09-21]
[Claim: The EVE LF280K product page lists 280 Ah nominal capacity, 3.2 V nominal voltage, ≤ 0.25 mΩ AC-IR (1 kHz), and recommended charge to 3.65 V / discharge to 2.5 V. | Src: EVE Energy Co., Ltd. — LF280K product page | URL: https://www.evebattery.com/product/lf280k.html | accessed 2026-09-21]
PO_2026_LFP_CN-EC.xlsx — purchase order (line item must read "EVE LF280K, Rev. 1.5 or compatible")Proforma_INV_*.pdf — supplier proforma invoicePackingList_*.xlsx — line-by-line packing listMSDS_*.pdf — Material Safety Data Sheet (EVE LF280K)UN38.3_TestSummary_*.pdf — UN 38.3 test summaryCoO_*.pdf — Certificate of OriginEVE_LF280K_DS_Rev1.5_2024-03.pdf — OEM datasheet shipped with the lotQC_Checklist_LFP_v1.pdf — downloadable checklist (see §10)[Claim: A lithium-ion cell is classified as Class 9 dangerous goods (UN 3480 / UN 3481) and requires an MSDS plus a UN 38.3 test summary for air or sea transport. | Src: UN Recommendations on the Transport of Dangerous Goods — 21st revised edition (UN ST/SG/AC.10/1/Rev.21) | URL: https://unece.org/transport/dangerous-goods/un-recommendations-transport-dangerous-goods-21st-revised-edition | accessed 2026-09-21]
| Step # | Action | Owner | Input doc | Output doc | Done-when |
|---|---|---|---|---|---|
| 1 | Pre-shipment doc pack review against PO line items and HS code list. | QC Coordinator | Proforma, Packing List, MSDS, UN 38.3, CoO | DocReviewReport_*.pdf |
Every line item matches PO quantity and reads "EVE LF280K, Rev. 1.5". |
| 2 | Container / pallet receipt at Guayaquil port or bonded warehouse; visual check of outer packaging, shock-watch indicators, and pallet integrity. | Warehouse Lead | Bill of Lading (FIATA eFBL or ocean B/L), Packing List | ReceiptReport_*.pdf |
No shock indicator tripped; carton counts match PI; damage photos filed if any. |
| 3 | Build inspection lot and select sample size using ISO 2859-1 normal inspection at AQL 1.0 (major electrical) and AQL 2.5 (minor visual). | QC Coordinator | ReceiptReport, EVE LF280K datasheet | SamplingPlan_*.xlsx |
Sample size n and Ac/Re values recorded against lot size N. |
| 4 | Rest cells at 25 °C ± 2 °C until surface temperature reads 23 °C–27 °C before any electrical test. | QC Technician | SamplingPlan, chamber log | ThermalSoak_*.csv |
Cell surface temperature reading between 23 °C and 27 °C. |
| 5 | Charge at 0.5C CC (140 A) to 3.65 V, then CV at 3.65 V to 0.05C (14 A) cut-off; rest 30 min; then discharge at 1C constant current (280 A) to 2.5 V, per EVE LF280K Rev. 1.5. | QC Technician | EVE LF280K datasheet, cycler log | DischargeRun_*.csv |
Capacity value Ah logged per cell. |
| 6 | Compute measured capacity vs OEM nominal. Pass criterion: ≥ 280 Ah (≥ 100% of nominal 280 Ah) per EVE LF280K Rev. 1.5; otherwise reject cell. | QC Engineer | DischargeRun | CapacityCheck_*.xlsx |
Each sampled cell ≥ 280 Ah. |
| 7 | Measure AC internal resistance at 1 kHz on a Hioki BT3562 or equivalent; record mΩ per cell. Pass criterion: ≤ 0.30 mΩ (= EVE typical 0.25 mΩ + 20%). | QC Technician | EVE LF280K datasheet, IR test log | IR_Measurement_*.csv |
Each cell AC-IR ≤ 0.30 mΩ; flag any cell > 0.30 mΩ. |
| 8 | Visual & dimensional check: terminal height, vent condition, no leakage, no swelling. | QC Technician | SamplingPlan | VisualReport_*.pdf |
Zero defects at AQL 1.0 critical; minor defectives within AQL 2.5. |
| 9 | Accept / reject decision per ISO 2859-1 Ac/Re values; quarantine any rejected lot pending supplier NCR. | QC Manager | CapacityCheck, IR_Measurement, VisualReport | LOTAcceptance_*.pdf |
Disposition recorded (Release / Use-as-is / Rework / Reject); signatures dated. |
| 10 | Apply lot ID labels (e.g., LFP-EC-EVE280K-YYYYMMDD-001) and file the QC folder in the ERP. |
Warehouse Lead | LOTAcceptance | LotLabel_*.png, ERP item receipt |
Each pallet/carton carries a scannable lot ID; ERP receipt posted. |
[Claim: AQL sampling plans for attribute inspection are specified by ISO 2859-1; the standard defines normal, tightened and reduced inspection levels and Ac/Re values keyed to lot size and chosen AQL. | Src: ISO 2859-1:1999 (Sampling procedures for inspection by attributes — Single sampling plans by AQL) | URL: https://www.iso.org/standard/114648.html | accessed 2026-09-21]
[Claim: For EVE LF280K cells, the OEM-rated nominal capacity is 280 Ah at 1C discharge to 2.5 V after a 0.5C CC–CV charge to 3.65 V; the OEM-rated typical AC internal resistance at 1 kHz is ≤ 0.25 mΩ. | Src: EVE LF280K Datasheet Rev. 1.5 (2024-03) | URL: https://www.evebattery.com/product/lf280k.html | accessed 2026-09-21]
| Phase | Duration (indicative) | Depends on | Status / notes |
|---|---|---|---|
| Vessel departure (Shanghai / Ningbo) | Day 0 | Supplier readiness, booking confirmation (FIATA eFBL or B/L) | Booking lead time varies by carrier |
| Ocean transit to Guayaquil (EC) | ~30–40 days | Direct vs transshipment routing | UNCERTAIN — confirm with carrier at booking |
| Customs clearance (EC) | 3–7 working days | HS code classification and SENAE document review | UNCERTAIN — depends on SENAE workload |
| Inland transport to bonded warehouse / site | 1–2 days | Customs release + truck slot | UNCERTAIN |
| Sampling + electrical testing (Steps 4–8) | 24–48 h | Cycler availability, ambient temperature | Step 4 thermal soak may extend by 12 h |
| Disposition + ERP posting (Steps 9–10) | 4–8 h | QC Manager approval | — |
[Claim: Incoterms 2020 are the ICC official trade-term rules used in this corridor. | Src: ICC Incoterms 2020 (official ICC publication) | URL: https://iccwbo.org/business-solutions/incoterms-rules/incoterms-2020/ | accessed 2026-09-21]
[Claim: The FIATA multimodal transport Bill of Lading (FBL) and the electronic FIATA Bill of Lading (eFBL) are issued per FIATA's standard documentation framework. | Src: FIATA Multimodal Transport Waybill (FBL) rules | URL: https://fiata.org/what-we-do/fiata-documents/ | accessed 2026-09-21]
| Candidate HS code | Description (WCO HS explanatory notes text) | Source |
|---|---|---|
| 8507.60 | Lithium-ion accumulators (including LFP chemistries) | WCO Harmonized System nomenclature |
| 8507.90 (parts) | Parts of accumulators (e.g., cell tabs, BMS) | WCO Harmonized System nomenclature |
Rates: PENDING — lookup at the time of each shipment. Use the Ecuadorian official customs portal (Servicio Nacional de Aduana del Ecuador — SENAE) tariff lookup, the Ecuadorian COMEX tariff database, and, where applicable, the Andean Community common external tariff (CAN/LIBRO I, Arancel Común).
Disclaimer: HS classifications, ad valorem rates, exemptions, and trade-agreement preferences (e.g., bilateral or CAN agreements) must be re-verified at the time of each shipment. Rates are intentionally not hardcoded — they are flagged PENDING — lookup and should be confirmed against SENAE and COMEX publications on the date of dispatch.
[Claim: The Ecuadorian customs authority is the Servicio Nacional de Aduana del Ecuador (SENAE). | Src: SENAE official portal | URL: https://www.aduana.gob.ec/ | accessed 2026-09-21]
[Claim: The Ecuadorian foreign-trade policy authority at the time of publication is COMEX (Comité de Comercio Exterior). | Src: COMEX official portal | URL: https://www.comex.gob.ec/ | accessed 2026-09-21]
| Cost slot | Indicative / status | Note |
|---|---|---|
| Cell unit price (FOB China) — EVE LF280K | indicative — per supplier quote | Locked in PO; not legal advice |
| Ocean freight (CN → EC) | indicative | Subject to BAF/CAF/port congestion at booking |
| Origin charges (THC, docs, AMS/ENS) | indicative | Carrier schedule governs |
| Destination THC + ISPS (Guayaquil) | indicative | Caribbean/SA port schedule applies |
| Ecuadorian import duty (ad valorem) | UNCERTAIN — PENDING — lookup | Verify at SENAE tariff lookup |
| Ecuadorian VAT (IVA) on imports | UNCERTAIN — PENDING — lookup | Verify current rate via SRI / COMEX |
| Special regime (e.g., Ecuadorian production development law) | UNCERTAIN | Subject to COMEX resolutions in force |
| Incoming QC (this SOP) | indicative — per quote | Scope: per sample, per lot |
[Claim: Customs valuation rules are governed by the WTO Customs Valuation Agreement, referenced in Ecuador via its incorporation into national law. | Src: WTO Agreement on Implementation of Article VII (Customs Valuation) | URL: https://www.wto.org/english/docs_e/legal_e/20-val.pdf | accessed 2026-09-21]
| Standard | Subject | Source |
|---|---|---|
| IEC 62660-1 | Performance testing of lithium-ion cells for automotive / industrial propulsion use | IEC — International Electrotechnical Commission |
| IEC 62133-2 | Safety requirements for portable lithium cells (general) | IEC — International Electrotechnical Commission |
| UN 38.3 (UNECE ST/SG/AC.10/11/Rev.6) | Transport safety testing for lithium cells | UN Manual of Tests and Criteria |
| UL 1973 | Batteries for use in stationary / motive applications | UL Standards & Engagement |
| CE marking directives applicable to Li-ion cells installed into equipment | CE — relevant EU directives | European Commission, Single Market & Standards |
[Claim: IEC 62660-1 covers performance testing of lithium-ion cells for automotive propulsion. | Src: IEC 62660-1 (official IEC publication) | URL: https://webstore.iec.ch/publication/6781 | accessed 2026-09-21]
[Claim: IEC 62133-2 specifies safety requirements for portable lithium-ion cells. | Src: IEC 62133-2 (official IEC publication) | URL: https://webstore.iec.ch/publication/6740 | accessed 2026-09-21]
[Claim: UN 38.3 is the UN test framework for lithium batteries in transport, defined in Section 38.3 of the UN Manual of Tests and Criteria. | Src: UN Manual of Tests and Criteria, Section 38.3 (UNECE ST/SG/AC.10/11/Rev.6 and amendments) | URL: https://unece.org/transport/dangerous-goods/un-manual-tests-and-criteria | accessed 2026-09-21]
[Claim: UL 1973 is the UL standard covering batteries for stationary and motive applications. | Src: UL Standards & Engagement | URL: https://www.shopulstandards.com/ProductDetail.aspx?UniqueKey=37037 | accessed 2026-09-21]
[Claim: CE marking of electrical/electronic equipment placed on the EU market is administered via the relevant EU directives published on EUR-Lex. | Src: EUR-Lex CE marking portal | URL: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32019R1020 | accessed 2026-09-21]
PENDING — lookup. Confirm against SENAE and COMEX publications on the date of shipment.Request Quote — replies in 48h Request QC_Checklist_LFP_v1.pdf (delivered after RFQ)