SINCE 1990
BESS · EV Fan Platform
for the Lithium Battery Era
From BESS container internal cooling to ATEX emergency exhaust, from EV fast-charging cooling to lithium battery factory ventilation — a single 5-product EC platform spans 4 applications. Top-5 NA BESS 350-unit field validation · 1.8-second emergency start · 2,200+ units deployed.
Why BESS & EV Pick LONGWELL
Lithium batteries are reshaping power infrastructure, and forced air cooling and exhaust are the silent backbone of their safe operation. The customer's hidden pain isn't the cells — it's the ATEX explosion-proof exhaust, container thermal management, and charger cooling. Engineering failures in these "non-battery" subsystems can delay or sink the entire project. LONGWELL's market entry point is not supplying fans — it is delivering battle-tested thermal and exhaust engineering solutions end-to-end.
350-Unit REM ATEX EC Field Validation
A Top-5 North American BESS manufacturer has 350 ATEX-explosion-proof EC fans deployed. NFPA 855 + 3-second emergency start + UL 9540A + customer 8D closed-loop all passed; measured 1.8s response, zero major incidents over 10 months, secured a 3-year priority supply agreement.
Single-Supplier 4-App + Unified Modbus
BESS container cooling + emergency exhaust + EV fast charging + battery factory — all 4 applications sourced from LONGWELL alone, with EC platforms sharing one Modbus register map. The customer BMS / FSC / charger controller integrates once.
90-Day ATEX NPI vs European 12 Months
European suppliers' ATEX custom NPI cycle is 12-24 months; LONGWELL is 90 days (validated on the 350-unit BESS project). A China-local Notified Body (TÜV NORD Shanghai) shortens the certification cycle by 60-70%.
ATEX-21 + High-Temperature Coverage
Lithium battery factory coating / formation workshops are Zone 21 — dust + electrolyte vapor coexist. RDH/AT ATEX-21 II 2D simultaneously passes dust + gas testing, with II 3GD combined marking available — one of the few Chinese suppliers with full ATEX coverage.
"Most fan suppliers can quote BESS exhaust on paper. Few can deliver 350 ATEX-certified units in 4 weeks. Even fewer can also handle the EV charger and the cathode workshop. LONGWELL is the rare one that delivers all three under one engineering organization."
— LONGWELL BESS / EV Strategy Brief, 2026 Q1
To Our BESS & EV Engineering Partners
To BESS OEMs, EPCs, storage owners, EV operators, and lithium battery factory engineering teams:
The BESS + EV fast-charging market is on a 35-45% CAGR through 2025-2030. But the customer's hidden pain isn't the cells — it's ATEX explosion-proof exhaust + container thermal management + charger cooling. Engineering failures in these "non-battery" subsystems can delay or sink the entire project. This is LONGWELL's market entry point in BESS / EV application engineering.
We don't supply fans — we deliver battle-tested thermal and exhaust engineering solutions end-to-end. LWBE3G backward-curved centrifugal serves BESS container cooling + EV fast-charge liquid heat-exchange; LWAE3G axial EC serves charger IGBT cooling + compact BESS cabinets; REM ATEX EC is the BESS emergency exhaust flagship — 350 units deployed at a Top-5 NA manufacturer; RDH/AT/ADH ATEX-21 covers lithium battery factory coating, formation, and module workshops.
This Pack documents our solution and engagement model. §1 lays out the 4-app architecture and value; §2 details the 5 core products; §3 maps each product to specific applications; §4 presents 3 flagship customer cases (2,200+ units combined); §5 and §6 cover the 90-day NPI and commercial terms.
BESS / EV 4-Application Architecture + LONGWELL Product Mapping
Each of the four BESS / EV applications has distinct pressure, environment, certification, and noise requirements. LONGWELL's Industry Pack maps purpose-engineered fan series to each application — no compromise, no over-spec.
BESS Container Cooling
Container Cooling
Battery cabinet circulation + HVAC integration. Low noise, IP54-65, EN 50604-1 compliant.
BESS Emergency Exhaust ATEX
Emergency Exhaust · Flagship
350 units at Top-5 NA BESS manufacturer. NFPA 855 + UL 9540A + 3-sec response.
EV Fast-Charging Cooling
Fast-Charging Cooling
350-600 kW charger internal cooling + liquid heat-exchanger fans. IP65 + EMC Class B.
Lithium Battery Factory
Battery Factory
Coating / formation / electrode workshop ATEX-21 dust extraction + factory ventilation. NMP/DMC vapors.
5-Product BESS / EV Engineering Architecture
REM ATEX EC, LWBE3G, LWAE3G, RDH ATEX, ADH — five product series each play a specific role across the 4 applications. The table below shows the overall mapping; details follow.
| Product | App | Engineering Role |
|---|---|---|
| REM ATEX EC ★ Flagship | ①+② | BESS emergency exhaust core + container exhaust high-pressure option — the only product with EC + ATEX + 1,500 Pa |
| LWBE3G | ①+③ | BESS container HVAC + EV fast-charge liquid heat-exchanger rear — mid-pressure EC centrifugal platform |
| LWAE3G | ③ | EV charger internal IGBT cooling + small BESS cabinet — compact low-pressure axial EC |
| RDH ATEX | ④ | Battery factory coating / formation dust collection main — 2,200 Pa + II 2D ATEX-21 |
| ADH | ④ | Battery factory workshop dilution ventilation — large airflow + optional ATEX-G |
★ Flagship Product: REM ATEX EC · BESS Emergency Exhaust
REM ATEX EC is the unique LONGWELL EC series that simultaneously offers (1) direct-driven EC integrated motor, (2) ATEX explosion-proof certification standard, and (3) 1,500 Pa pressure capability — the three hard conditions for BESS emergency exhaust. 350 units deployed at a Top-5 NA manufacturer (see §4 Case 1).
| Item | Specification |
|---|---|
| Impeller | Backward-curved profile, anti-static coating + G2.5 dynamic balance, ATEX grounding continuity ≤ 100 Ω |
| Motor | EC external-rotor + ATEX certified (WEG/Siemens) + sealed driver, 0-10V / PWM / Modbus RTU / BACnet full protocols |
| Max Pressure | 1,500 Pa · typical BESS emergency operating point 1,000-1,200 Pa |
| Airflow | 4,000 - 25,000 m³/h (Ø 355 - 800 mm), single unit covers a 250 kW BESS container |
| ATEX Marking ★ | II 3D Ex tc IIIB T125°C Zone 22 standard · optional II 3GD combo (Zone 22 + Zone 2 thermal runaway gas) |
| Emergency Start | Siemens FailSafe / dry contact trigger → 1.8s to 80% speed (req. ≤ 3s) → 7.5s to rated (req. ≤ 10s) |
| UL Cert. | UL 507 + UL 1004-1 + NA NRTL ATEX equivalent (Class I Div 2 + Class II Div 2) |
| BMS Integration | Modbus RTU + dry contact emergency input + fault alarm push to plant safety system (Siemens FailSafe / Rockwell GuardLogix validated) |
| Size Range | REM 355 / 400 / 450 / 500 / 560 / 630 / 710 / 800 (Ø 450 is the mainstream BESS size) |
REM Performance Reference Points
| Model | Airflow | Pressure | Power | Efficiency η |
|---|---|---|---|---|
| REM 400 ATEX EC | 6,500 m³/h | 1,000 Pa | 2.8 kW | 72% |
| REM 450 ATEX EC ★ Mainstream | 9,200 m³/h | 1,200 Pa | 4.2 kW | 75% |
| REM 500 ATEX EC | 12,500 m³/h | 1,300 Pa | 5.8 kW | 76% |
| REM 560 ATEX EC | 16,800 m³/h | 1,400 Pa | 7.5 kW | 77% |
★ REM 450 is the mainstream size for BESS emergency exhaust on 250-500 kW containers (350-unit case standard).
LWBE3G · BESS Container Cooling + EV Fast-Charge Liquid Heat Exchange
LWBE3G is LONGWELL's backward-curved EC centrifugal fan platform, serving two roles in BESS / EV: (1) BESS container HVAC + battery cabinet circulation; (2) EV fast charger (350-600 kW) liquid heat-exchanger rear-radiator cooling.
| Dimension | BESS Container Config | EV Charger Config |
|---|---|---|
| Typical Size | Ø 280 / 310 / 355 mm | Ø 250 / 280 / 310 mm |
| Airflow | 3,000 - 8,000 m³/h | 2,000 - 5,500 m³/h |
| Pressure | 400 - 800 Pa | 600 - 1,000 Pa |
| Enclosure | IP54 (container interior) | IP65 (outdoor charger) |
| EMC | Class A sufficient | Class B required (no PLC/5G interference) |
| Operating Temp. | -30°C to +55°C | -40°C to +60°C wide-range outdoor |
| Noise Lp @ 1m | ≤ 65 dB(A) | ≤ 58 dB(A) (residential) |
| Control Interface | Modbus RTU + 0-10V | Modbus RTU + CAN Bus |
LWAE3G · EV Charger Internal IGBT Cooling + Compact BESS Cabinet
LWAE3G is the axial EC platform — the right answer for compact, low-pressure, high-airflow cooling. Two scenarios: (1) EV fast charger internal IGBT / power module cooling; (2) small-format BESS cabinets (≤ 100 kWh) where space and noise constraints apply.
| Item | Specification |
|---|---|
| Impeller Type | Axial, 7-9 composite blades, CFD-optimized for low drag + low noise |
| Size Range | Ø 200 / 250 / 280 / 315 / 350 / 400 mm (EV chargers use 250-315 mm) |
| Airflow | 800 - 6,000 m³/h (scales with size) |
| Pressure | 80 - 350 Pa (typical axial range) |
| Motor | EC external-rotor, 24V DC / 48V DC supply (EV charger DC bus compatible) + 0-10V/PWM/Modbus/CAN |
| Enclosure | IP65 outdoor standard · IP67 optional (coastal high-humidity) |
| Noise | ≤ 55 dB(A) @ 1m · EV residential-zone compliant |
| EMC | EN 55014 Class B + FCC Part 15B + CE |
▸ LWAE3G vs LWBE3G Selection Logic · Typical Charger Combination
Choose LWAE3G when: pressure ≤ 350 Pa + compact space (charger interior / small BESS cabinet) + fan blows directly toward IGBT or battery module
Choose LWBE3G when: pressure 400-1,000 Pa + longer airflow path (container long ducts / liquid heat-exchanger rear) + higher airflow demand
Typical EV fast charger combination: LWAE3G (internal IGBT cooling) + LWBE3G (liquid heat-exchanger rear) — single charger uses 8-12 LWAE3G + 2-4 LWBE3G
RDH ATEX · Battery Factory Coating / Formation Workshop Dust Collection
RDH ATEX is the heavy-duty industrial dust-collection workhorse. Lithium battery coating (positive / negative electrode) + formation workshops are ATEX Zone 21 (frequent dust), requiring II 2D Cat. 2. RDH ATEX-21 is one of the few Chinese products covering this severity level.
| Item | Specification |
|---|---|
| ATEX Marking ★ | II 2D Ex tb IIIB T125°C Da Zone 21 — globally one of the few products passing dust + lithium electrolyte gas testing |
| Max Pressure | 2,200 Pa (typical coating workshop 1,800-2,000 Pa) |
| Airflow | 8,000 - 40,000 m³/h (RDH 400-630) |
| Impeller | Backward-curved 11 blades + anti-static epoxy coating + G1.0 industrial dynamic balance + fully welded steel construction |
| Motor | WEG ATEX-21 IE4 + external VFD + winding PTC + bearing PT100 dual temperature monitoring |
| Typical Use | Cathode coating dust collection / anode graphite coating dust / formation workshop exhaust / electrolyte room ventilation |
| Compliance | NFPA 484 (metal dust) + NFPA 654 (dust control) + GB 50058 + IECEx |
ADH · Lithium Battery Factory Workshop Ventilation
ADH (heavy-duty forward-curved belt-driven) handles large-airflow facility ventilation in lithium battery factories: dilution ventilation, area supply air, and 5,000+ m² factory RTU evaporator service. Standard and ATEX-G versions both available.
| Item | Specification |
|---|---|
| Airflow | 20,000 - 60,000 m³/h (battery factory mainstream sizes) |
| Max Pressure | ≤ 1,000 Pa |
| ATEX Options | ✓ II 3G ATEX Zone 2 (electrolyte rooms) + II 3D Zone 22 (dust environments) |
| Typical Use | Workshop dilution ventilation / factory supply air / large RTU evaporators / module assembly air circulation |
The lithium battery factory hidden challenge: the coating workshop is a Zone 21 dust environment, but formation cabinets + electrolyte rooms release DMC/EMC vapors classified as Zone 2 gas — and the two coexist. LONGWELL RDH ATEX-GD and AT ATEX-GD simultaneously pass II 2D + II 3G testing, letting customers use one fan type for mixed environments — substantially simplifying spare parts management.
BESS Container Cooling & HVAC Integration Reference Configuration
Modern utility-scale BESS containers (1-5 MWh) require multiple coordinated airflow systems: (1) battery cabinet internal circulation to equalize cell-to-cell temperature; (2) container-level HVAC for ambient regulation; (3) routine operation exhaust. LONGWELL LWBE3G + LWAE3G + REM platforms together cover all three.
Key Engineering Challenges
| Cell Temperature Uniformity ±2°C | Lithium battery cycle life is temperature-sensitive; temperature delta > 5°C accelerates capacity fade by 30%. LWBE3G + ducting design delivers ±2°C uniformity. |
| IP54 Dust + Splash Protection | Outdoor BESS container interior cooling fans require IP54 to withstand outdoor dust + occasional rain ingress. LWBE3G container variant ships with IP54 standard. |
| Wide-Temperature Start at -30°C | Cold-region North America deployments (Wyoming / Alberta) require -30°C winter starts; EC driver needs low-temperature preheat mode. |
| BMS Synchronized Control | Multi-fan arrays (12-24 units per container) require Modbus master/slave synchronization to prevent phase-drift induced vortex vibration. |
LONGWELL Recommended Single-Container Configuration
4 subsystems, 4 product types — a single container fan BOM totals 13-24 fans, all sharing the same Modbus register map. Single-supplier integration = OEM BMS developed once, deployed across thousands of containers.
| Subsystem | Product | Quantity & Configuration |
|---|---|---|
| Battery Cabinet Circulation | LWBE3G Ø 250-280 | 8-16 units / container, Modbus master/slave sync |
| Container HVAC | LWBE3G Ø 310-355 | 2-4 units / container, supply + return air loop |
| Routine Exhaust | LWAE3G Ø 280-315 | 2 units / container, continuous low-speed operation |
| Emergency ATEX | REM ATEX EC Ø 450 | 1-2 units / container, FailSafe-triggered |
EV Fast Charging 350-600 kW · Two Cooling Architectures
Fast charging at 350-600 kW per port generates 15-40 kW of waste heat — far above what passive cooling can handle. Modern fast chargers use forced air or liquid cooling, both requiring engineered fan systems. LONGWELL covers both architectures.
| Architecture | Forced Air | Liquid-Cooled |
|---|---|---|
| Typical Power | ≤ 350 kW | 350-600 kW |
| Components Cooled | IGBT + transformer + inductor | IGBT + charging gun + liquid loop |
| LONGWELL Internal Cooling | LWAE3G Ø 280 × 8-12 units | LWAE3G Ø 250 × 6-8 units |
| LONGWELL Heat-Exchanger Fans | LWBE3G Ø 280 × 2-4 units | LWBE3G Ø 310 × 4-6 units |
| Total Noise Lp @ 1m | ≤ 60 dB(A) | ≤ 58 dB(A) (residential + 5G no interference) |
Lithium Battery Factory · 3-Workshop Configuration
| Workshop | Process Characteristics | Recommended Configuration |
|---|---|---|
| Cathode / Anode Coating | Metal dust (Ni/Co/Mn/graphite) + Zone 21 frequent dust + NMP vapor | RDH ATEX-21 II 2D dust collection main (1,800-2,200 Pa) + AT ATEX-21 mid-stage booster |
| Formation Workshop | DMC/EMC vapor + occasional HF + Zone 2 gas environment | AT ATEX-G II 3G exhaust + ADH ATEX-G workshop dilution + 316L stainless impeller (HF resistant) |
| Electrode / Module Assembly | Standard cleanroom + localized occasional dust + general air circulation | LWBE3G + AT standard + ADH workshop ventilation (general industrial, no ATEX) |
BESS / EV Certification Matrix + Test Report Library
LONGWELL BESS / EV products ship with the regulatory framework required for global deployment. The matrix below shows certification coverage across the 5 core products in this Pack. Gold-marked items carry the highest weight in BESS customer audits.
Product Certification Inventory
| Certification | Standard | Applicable Products |
|---|---|---|
| CE | EU Machinery / EMC / LVD | All 5 products |
| ATEX ★ | ATEX 2014/34/EU Zone 21/22 + Zone 2 | REM · RDH · AT · ADH ATEX |
| IECEx | IECEx Scheme global ATEX recognition | Same coverage as ATEX |
| UL 9540A ★ | BESS thermal runaway large-scale fire test | REM ATEX EC pass (350-unit case) |
| UL 507 + UL 1004-1 | NA electrical safety (fan + motor) | REM · LWBE3G · LWAE3G NA variant |
| NFPA 855 + NFPA 70 ★ | BESS installation fire / explosion compliance | REM ATEX EC emergency exhaust compliant |
| EN 50604-1 | EU secondary battery system safety | LWBE3G BESS container variant |
| IEC 62933-5 | Electrical energy storage system safety | LWBE3G + REM ATEX EC combined solution |
| GB/T 36276 + GB 51048 | China BESS lithium battery + station design | All 5 products |
| EMC Class B | EN 55014-1/-2 + FCC Part 15B | LWBE3G EV + LWAE3G EV (required) |
| ISO 9001 / 14001 / 45001 | Quality / environment / occupational safety | ✓ Certified |
BESS / EV Test Report Library
T1 = PDF within 1 business day; T2 = scheduled at named lab. T1-T2 reports complimentary for project-intent customers (NDA-signed or RFP-issued). The complete ATEX + UL 9540A + emergency response test reports from the 350-unit REM ATEX EC BESS case are available as a flagship reference package.
| Test Type | Standard | Coverage | Status |
|---|---|---|---|
| ATEX Type Test Zone 22 | EN 60079 + IECEx ExTR | REM · RDH · AT · ADH | ✓ T1 Ready |
| ATEX Zone 21 (frequent dust) | EN 60079-31 IIIC Da | RDH ATEX-21 · AT ATEX-21 | ✓ T1 Ready |
| II 3GD Combined (dust+gas) | ATEX dual certification | REM ATEX-GD · RDH ATEX-GD | ✓ T1 Ready |
| 3-Second Emergency Start | LONGWELL internal + customer acceptance | REM ATEX EC (BESS) | ✓ T1 Ready |
| UL 9540A Subsystem Pass | UL 9540A Cell-level + Module | REM ATEX EC | ✓ T1 Ready |
| EMC Class B Verification | EN 55014 + FCC Part 15B | LWBE3G EV + LWAE3G EV | ✓ T1 Ready |
| Wide-Temperature Start -40°C | IEC 60068-2-1 cold start | LWBE3G EV · LWAE3G EV · REM | ✓ T1 Ready |
| IP65 Protection Rating | IEC 60529 IP65 full test | LWBE3G EV · LWAE3G EV | ✓ T1 Ready |
| HF Corrosion 316L Validation | ASTM A480 + HF exposure | AT 316L · RDH 316L (formation) | ◐ T2 (2026 Q3) |
| Modbus + CAN Interoperability | Modbus RTU + CAN 2.0B | LWBE3G EV · LWAE3G EV | ✓ T1 Ready |
BESS Emergency Exhaust Thermal Runaway Compliance Framework
| Region | Core Standard | Exhaust Requirement |
|---|---|---|
| North America | NFPA 855 + UL 9540A | Smoke concentration triggered + forced exhaust 5 ACH |
| European Union | EN 50604-1 + IEC 62933-5 | Flammable gas (HF / fluorides) forced below 25% LEL |
| China | GB/T 36276 + GB 51048 | Thermal runaway triggers forced exhaust until safe gas threshold |
| International | IEC 60079 + ATEX 2014/34/EU | Thermal runaway gas + lithium dust = II 3GD combined marking |
3 Flagship Cases: NA BESS · Korean Battery Fab · European EV
Three flagship deployments across BESS emergency exhaust, lithium battery factory, and EV fast-charging applications — 2,200+ units delivered in 18 months, in service across North America, Asia, and Europe.
Top-5 NA BESS Manufacturer · 350 Units REM ATEX EC
Customer name disclosable under separate NDA. Data verified by LONGWELL PMO and confirmed by customer's procurement and safety teams.
Project Context · 2024 Q4
A Top-5 NA BESS manufacturer building Texas + Nevada lithium battery factories with a 2025 capacity target of 20 GWh. A 2024 Q3 safety audit identified that cell coating + formation workshops lacked sufficient emergency exhaust to comply with NFPA 855 + OSHA. The customer was given a 6-month timeline to retrofit the ATEX explosion-proof exhaust system, involving approximately 350 high-pressure blowers.
Hard Requirements
- ATEX: II 3D Ex tc IIIB T125°C Zone 22 full compliance + Notified Body number
- Emergency Response: ≤ 3-second emergency start; 0 → rated speed ≤ 10 seconds
- BMS Integration: Modbus RTU + dry contact emergency input, interlocked with Siemens FailSafe
- Delivery: first batch of 80 units within 4 weeks; remaining 270 units within 4 months in staged batches
- UL: UL 507 + UL 1004-1 + NA NRTL ATEX equivalent certification
LONGWELL Solution & Project Outcomes
| Metric | Required | Achieved |
|---|---|---|
| ATEX Certification Coverage | II 3D Cat. 3 full compliance | All 350 units passed |
| Emergency Start Response | ≤ 3 seconds | 1.8 sec (measured) |
| 0 → Rated Speed | ≤ 10 seconds | 7.5 sec (measured) |
| First 80 Units Delivery | 4 weeks | 3.5 weeks ahead of schedule |
| Field Quality Incidents (10 months) | ≤ 1% | Zero major incidents |
| 2025 Full-Year Orders | — | Additional 350 units (REM 500 / 560) |
| Frame Agreement | — | 2025-2027 three-year priority supply |
Korean Top-3 Lithium Battery Manufacturer · Coating + Formation · 220 Units
Customer name disclosable under separate NDA. Project executed 2024-2025 across two factory sites in Korea.
Project Context
A Korean top-3 lithium battery manufacturer invested in 2024 in new-generation 21700 cylindrical + 4680 large-format cylindrical cell production lines, total annual capacity 35 GWh. New factory coating + formation workshops required a complete ATEX-21 explosion-proof ventilation system. Korean-specific requirement: products must pass KCs (Korea Certification, ATEX equivalent) compliance + Korean-language technical documentation.
LONGWELL Solution
- Coating Workshop: RDH 500 ATEX-21 II 2D × 24 units (dust collection main) + AT 18-18 ATEX-21 × 36 units (mid-stage booster)
- Formation Workshop: AT ATEX-G II 3G × 48 units + ADH ATEX-G × 28 units + 316L stainless impellers (HF resistant)
- Electrode / Module: LWBE3G × 56 units + AT × 28 units (general industrial, no ATEX)
- Localization: 100% Korean-language nameplates + technical docs + Modbus register table + KCs equivalent certification
Project Outcomes
| Total Units | 220 units (coating 60 + formation 76 + electrode/module 84) |
| Delivery Cycle | 7 months complete (customer required 9 months) — 2 months ahead |
| ATEX-21 + ATEX-G Pass | All 220 units passed third-party ATEX acceptance |
| Cost Savings vs Korean Local Supplier | 32% equipment cost + 5-month delivery advantage |
| Follow-on Cooperation | 2026-2028 phase 2 + phase 3 factory frame agreement |
European Top-3 Fast-Charging Operator · 120 Stations · 1,680 Units
Customer name disclosable under separate NDA. Project executed 2024-2025 across Germany / Netherlands / France.
Project Context
The customer launched a 120-station deployment of 350 kW + 600 kW fast chargers in 2024. Pain points: the original solution used Ebmpapst fans, but 600 kW stations exceeded the 55 dB residential nighttime noise limit + northern cold regions failed -30°C cold start + EMC interfered with 5G communication. Required re-selection and 120-station deployment within 6 months.
LONGWELL Solution
- Charger Internal IGBT Cooling: LWAE3G Ø 280 EV variant × 10 units per charger (low-noise EC + DC bus supply + EMC Class B)
- Liquid Heat-Exchanger Rear: LWBE3G Ø 310 EV variant × 4 units per charger (IP65 + wide-temp -40°C + Class B + ≤ 58 dB)
- Local Integration: Modbus + CAN dual-protocol; zero-modification compatibility with charger controllers (ABB / Siemens)
Project Outcomes
| Total Units | 1,680 units (120 stations × 14 fans per charger) |
| Delivery Cycle | 4.5 months complete (customer required 6 months) — 1.5 months ahead |
| Nighttime Noise Measured | 52 dB(A) @ 7m (required ≤ 55 dB) |
| -30°C Cold-Start Pass Rate | 100% (Ebmpapst original < 60%) |
| Cost vs Ebmpapst Re-Selection | 38% cost reduction + 1.5 months schedule savings |
3-Case Pattern Defining LONGWELL's BESS / EV Position
| Metric | Case 1 BESS | Case 2 KR Battery Fab | Case 3 EU EV |
|---|---|---|---|
| Application Dimension | ② Emergency Exhaust ATEX | ④ Battery Factory | ③ EV Fast Charging |
| Total Units | 700 REM ATEX EC | 220 (4 series) | 1,680 (2 series) |
| Region | North America (TX + NV) | Korea | DE / NL / FR |
| Flagship Technical Differentiator | 3-sec emergency start | ATEX-21 + KCs | ≤ 58 dB + -40°C |
| Schedule Lead | 3.5 weeks vs 4 weeks | 2 months ahead | 1.5 months ahead |
| Cost Savings vs Original Plan | — (new build) | 32% vs Korean local | 38% vs Ebmpapst |
| Follow-on Cooperation | 3-year frame agreement | Phase 2/3 factory frame | Renewal 200-station expansion |
Case Pattern Summary: LONGWELL's BESS / EV market position is defined by three consistent patterns: (1) solving customer hidden pain points (emergency response / ATEX-21 dual / noise + EMC) rather than competing on price alone; (2) 90-day NPI vs 12-month delivers 1-2 months ahead of schedule; (3) first-order excellence converts to multi-year frame agreements — customers stop re-tendering.
BESS / EV-Specific Engineering Support
LONGWELL provides BESS / EV customers with the engineering tools needed to integrate the 5-product solution efficiently — shared Modbus register maps, shared CAD interfaces, single CFD service entry point.
| Tool | Purpose | Access |
|---|---|---|
| BESS Emergency Exhaust Sizing Calculator | Input container capacity (kWh) + indoor free volume + 5 ACH exhaust requirement → returns required REM ATEX EC quantity + size + ductwork design recommendations | Free |
| EV Fast Charger CFD Service | Customer provides charger internal 3D model → LONGWELL completes full-operating CFD + fan layout optimization + noise prediction + EMC evaluation | Project-intent free |
| Battery Factory ATEX Zoning Assessment | Based on customer factory process + media + exhaust scale, provides Zone 21 + Zone 2 zoning map + fan ATEX rating matching list | NDA access |
| Modbus + CAN Protocol Manual | BESS BMS (Siemens FailSafe / Rockwell GuardLogix) + EV ECU (ABB / Siemens) validated integration checklist | NDA access |
| 3D CAD Library + ATEX Interfaces | 5 products in STEP / IGES / Parasolid all sizes + ATEX variant interface dimensions + container mounting base drawings | NDA access |
| UL 9540A Compliance Support | REM ATEX EC has passed UL 9540A cell-level + module testing; LONGWELL provides complete test reports for customer BESS system-level UL 9540A application | BESS customers free |
BESS / EV Field Application Engineering
BESS / EV strategic customers receive on-site Field Application Engineering: North American engineers deploy 2-4 weeks at customer factory for ATEX acceptance + Modbus commissioning + customer / owner sign-off; European engineers serve DE / NL / FR EV customers; Korea / China / SEA covered by Shanghai + Ningbo teams.
90-Day Custom NPI + Reliability Framework
If standard configurations don't fully match your BESS / EV application, LONGWELL offers the same structured 90-day NPI cycle that delivered the 350-unit BESS case and the 120-station EV case — vs European competitors Ebmpapst / Nicotra at 12-18 months.
| Stage | Engineering Actions | Customer Involvement |
|---|---|---|
| S1 · Day 1-14 Requirements | Operating point + ATEX zone + BMS/ECU protocol + timeline window | Provide container volume / emergency ACH / ATEX rating / BMS vendor / charger power · 1-2 meetings |
| S2 · Day 15-45 CFD + ATEX Design | Full-system CFD + ATEX compliance design + 3D model | LONGWELL-led; customer receives CFD simulation + performance prediction + ATEX compliance documents + 3D + noise + EMC predictions |
| S3 · Day 46-70 Sample + DV | Engineering samples + customer integration + DV | 3-5 samples + ATEX type test + UL 9540A subsystem validation + customer factory integration testing |
| S4 · Day 71-90 PV + MP Release | DV/PV + ATEX third party + first shipment | ATEX Notified Body third-party acceptance (TÜV NORD / SGS) + UL 9540A system-level validation support + production process documentation + first order |
Pre-Shipment 100% Reliability Testing (BESS / EV Specific)
| 100% Online Performance Test | Per unit: airflow / pressure / RPM / current / voltage / vibration / noise / EMC scan; data stored in MES linked to serial number |
| BESS Emergency Start 100% | Every REM ATEX EC unit 100% tested for 3-sec response → measured 1.8 sec average; data included in packing list delivered to customer |
| ATEX 100% Individual Certification | ATEX variants ship with individual unit certificates + Notified Body numbers; Notified Body samples 1% |
| Wide-Temp Start 100% | EV variant LWBE3G / LWAE3G per unit: -30°C cold start + 60°C full-load test |
| L10 Accelerated Aging (Batch) | Per batch 5 units 1,500h + 60°C accelerated aging, L10 = 60,000h @ 40°C (BESS 10-year project lifecycle) |
Warranty Policy (BESS / EV Enhanced)
| Commitment | Terms |
|---|---|
| Standard Warranty | BESS / EV applications 24 months base; ATEX variants 30 months |
| BESS Project Extended Warranty | 48-60 months (aligned with BESS container 5-10 year warranty; first 36 months at no cost) |
| MTBF Commitment | 60,000 hours @ 40°C (BESS 10-year @ 5,000h/yr operating profile) |
| Regional Spare Parts Depot | BESS projects ≥ 5% project volume + critical ATEX spares 100% interchange compatibility for 24 months |
| 8D Field Response | 24h receive → 5 working-day root cause → 15 working-day correction + emergency on-site within 48h |
OEM / EPC Commercial Terms
Delivery
Monthly rolling forecast + 30-day PO + consignment inventory (regional spare parts depot), guaranteeing 30-45 day delivery.
Pricing
Annual-volume tiered pricing; 500+ container customers receive an additional 8-12% discount.
Application Engineers
OEM customers receive 1-2 dedicated named application engineers for long-term product roadmap coordination.
Extended Warranty
48-60 months (aligned with BESS container 5-10 year warranty policy).
Four Engagement Paths
Four ways to move from this Industry Pack to a working partnership — by customer type: BESS OEM / EV operator / lithium battery factory EPC / utility storage project owner.
BESS Emergency Exhaust Fast Quote
Send BESS container capacity (kWh) + ATEX zone + BMS vendor → within 48 hours receive REM ATEX EC model + quantity + emergency-start validation documents + pricing.
EV Fast Charger CFD Engineering
Sign NDA → provide charger internal 3D model → LONGWELL completes CFD + fan layout + noise + EMC evaluation → LWAE3G / LWBE3G configuration proposal + pricing.
Battery Factory EPC Master Plan
EPC general contractor / owner → sign NDA → factory process review + ATEX zoning assessment → coating / formation / module / facility ventilation full-factory fan BOM + frame agreement.
Utility-Scale (GW) Storage Stations
IPP / utility / EPC project owner → sign NDA → long-term cooperation agreement → lock model / unit price / delivery SLA + application engineer field support.
BESS / EV Sales Contact
Cool Cells. Safe Cells. Engineered for the Energy Storage Era.
One supplier across 4 BESS / EV applications — BESS Container · Emergency Exhaust ATEX · EV Fast Charging · Battery Factory. Where lithium scales, LONGWELL keeps it cool and safe.