Engineering Reference Case Profile · Battery Gigafactory ATEX Dust Collection

Battery Cathode Powder Dust Collection · Gigafactory ATEX IIIC

A composite reference case based on representative battery gigafactory cathode/anode dust collection deployments — supplying ATEX II 3D Ex tc T125°C IIIC certified plug fans + high-pressure CDU fans for cathode (NMC) powder handling with 3.2 kPa static for dense cartridge filter face, ramping to 80,000 fans/year across gigafactory build-out.

Project size: Gigafactory · cathode workshop · 12,000 ATEX plug + 5,000 high-pressure CDU per year Reference period: Composite reference · 2025–2026 deployment pattern Geography: Asia-Pacific battery gigafactory segment

About this case profile: This is an anonymized composite reference case based on representative LONGWELL platform deployments in the Industrial Dust · Battery Cathode Workshop segment. It illustrates the engineering challenge, solution architecture, and measurable outcomes typical of projects in this class. Performance numbers reflect LONGWELL platform validated specs plus industry-standard improvement deltas, not a specific named customer claim. Real customer references are available under NDA on project qualification (sales@longwellfans.com).

1 · Challenge

NMC cathode powder dust = combustible electrically-conductive (IIIC) — most aggressive ATEX dust group.
ATEX II 3D Ex tc T125°C IIIC required for collector interior fans (zone 21).
Modern dense cartridge filter media requires 1,500–3,000 Pa fan static pressure — exceeds standard plug fan envelope (1,800 Pa).
Gigafactory ramp: 12,000 ATEX plug fans + 5,000 high-pressure CDU fans per year, sustained through 2030.
OSHA NFPA 652 + EU CBAM-aligned emissions documentation per shipment.

2 · Solution Architecture

Per gigafactory cathode workshop: 12,000 LWBE3G-ATEX-IIIC in cartridge dust collectors (zone 21 interior). 5,000 LWHV-ATEX-450-HP on dense cartridge filter face for cathode dust capture at 3.2 kPa static. 3,000 LWAE3G-ATEX-630 for workspace clear-air ventilation. All units include IEC 60079-31 ATEX certificate per shipment + NFPA 652 compliance declaration.

Bill of materials

LONGWELL SKU	Type	Qty	Key spec
LWBE3G-ATEX-IIIC	ATEX EC plug fan	12,000 units/yr	Ø355–Ø560 mm, II 3D Ex tc T125°C IIIC, electrically grounded impeller + shaft per IEC 60079-31, 87% η peak
LWHV-ATEX-450-HP	ATEX high-pressure plug fan	5,000 units/yr	Ø450 mm, 3.2 kPa static, II 3D Ex tc T125°C IIIC, anti-static + spark-resistant housing
LWAE3G-ATEX-630	ATEX workspace ventilation axial	3,000 units/yr	Ø630 mm, ATEX II 3D Ex tc T125°C IIIC for cathode-workspace clear-air ventilation

3 · Measured Outcomes

ATEX certification scope

II 3D Ex tc T125°C IIIC

full combustible-dust IIIC

Static pressure capability

3.2 kPa

LWHV-ATEX-450 max

Annual fan supply

20,000 units

ATEX + high-pressure + workspace

ATEX-related incidents (2-yr)

in field service

Lead time first batch

6 weeks

vs 16–22 wk European ATEX

CapEx delta vs ebm-papst RadiPac ATEX

−45%

at gigafactory volume

4 · Implementation Timeline

Week 0Gigafactory PO for 20,000-unit annual program

Week 1–5ATEX recertification + tooling for IIIC scope

Week 6First 1,500-unit batch ships

Month 3Series cadence at 1,700 units/month

Year 1Cumulative 20,000 fans deployed across cathode workshop

Year 2+Steady 1,700 units/month + commissioning at next gigafactory phase

5 · Engineering Lessons

ATEX dust group IIIC (combustible electrically-conductive) is more aggressive than IIIB (grain) or IIIA (sugar). Battery cathode dust requires full IIIC scope — IIIB-only certification is insufficient.
3.2 kPa static pressure capability (LWHV-ATEX vs standard plug at 1.8 kPa max) was the binding spec for modern dense cartridge filter face. Standard plug fans starve below design CFM in this duty.
ATEX certificate per shipment (not as one-time type test) is mandatory for permit-issuing authorities. Compliance statement attached per bill of lading.
Workspace clear-air ventilation (LWAE3G-ATEX-630) in zone 22 (occasional dust) is often forgotten in dust-collector OEM spec — but required for OSHA compliance at the workplace.
Sustained 1,700 fans/month cadence required dedicated ATEX production line at Yuyao + Hai Phong — competitor European brands cannot match this volume.

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