Projekthintergrund
With the rapid expansion of electric mobility and renewable energy storage systems, a leading battery technology manufacturer launched a targeted customization project in 2026 for battery pack enclosures. These enclosures are critical for protecting internal battery modules, BMS (Battery Management System) components, and wiring, requiring stable performance in both mobile and stationary applications.
Zu den wichtigsten Anforderungen gehören:
- IP54 Staub- und Wasserbeständigkeit
- Dimensionale Toleranz ≤±0.03mm
- Effiziente Wärmeabfuhr für den kontinuierlichen Betrieb
- Lightweight design for enhanced energy efficiency
- Compatibility with standard battery modules and mounting hardware
- Stabile Chargenproduktionsqualität
- Durable, corrosion-resistant surface finishes for long-term use
Sanjun Hardware was selected for its precision sheet metal technology, professional heat dissipation design, and proven track record in industrial battery enclosure customization.
Herstellungsprozess von Kernbauteilen
The battery pack enclosure consists of the main enclosure, top ventilation cover, front connector panel, and mounting brackets. All production follows ISO 9001 quality standards and industrial battery enclosure specifications.
1. Materialauswahl & Vorbehandlung
- Main enclosure & panels: 1.2mm aluminum alloy sheet, providing high strength-to-weight ratio, excellent thermal conductivity, and natural corrosion resistance.
- Pre-treatment: Fully automated ultrasonic degreasing, derusting, and chromate conversion coating to create a clean, high-adhesion surface base ideal for subsequent finishing.
2. Kern Fertigung Handwerk
- Precision Laser Cutting: 8000W fiber laser cutter with ±0.02mm tolerance, using nitrogen assist gas to minimize heat distortion and maintain material integrity. This ensures accurate cuts for ventilation holes, connector cutouts, and mounting slots.
- CNC Bending & Forming: 9-axis CNC bending machine with custom jigs, ensuring springback ≤0.02mm and consistent structural dimensions. This is critical for the precise alignment of internal components and the tight fit of the enclosure.
- Precision Hole Processing: Laser positioning and CNC punching technology are used to ensure the accuracy of component mounting holes, connector openings, and ventilation slots within ±0.01mm. This guarantees seamless integration with internal battery modules and BMS components.
- Heat Dissipation Structure: Precision-punched honeycomb ventilation holes on the top and side panels, designed to optimize airflow and maintain optimal operating temperatures for internal battery components.
- Surface Finishing: Clear anodized coating applied to the aluminum enclosure, offering enhanced corrosion resistance, improved thermal conductivity, and a durable, non-conductive surface for electrical safety. Coating thickness is strictly controlled at 10–15μm for uniform coverage and long-lasting protection.
- Assembly & Sealing: High-density foam gaskets embedded in the enclosure seams to ensure a tight seal. Reinforced mounting brackets with precision holes are integrated into the enclosure for secure installation, while snap-fit locking tabs enable quick and reliable assembly of internal components.
3. Qualitätskontrolle & Testen
- Dimensional inspection: CMM measurement to confirm tolerance ≤±0.03mm and compatibility with standard battery modules.
- IP54 Schutzprüfung: Staub- und Wasserbeständigkeitsprüfung nach IEC 60529.
- Wärmeableitungstest: Wärmebildgebung zur Überprüfung einer effizienten Luftströmung und Temperaturregelung unter voller Last.
- Connector fit test: Assembly testing with the client’s battery connectors to ensure seamless fit and electrical integrity.
- Vollfunktionelle Inspektion: 100% Inspektion vor Lieferung auf Null Mängel.
Projektherausforderungen & Lösungen
1. Herausforderung: Wärmeabfuhr und Staubschutz ausgleichen
The battery pack requires efficient airflow to prevent overheating, while also needing to protect internal components from dust and debris common in industrial environments.
Lösung: We designed a multi-layer ventilation system with precision-punched honeycomb holes and removable dust filters, allowing for optimal airflow while preventing dust ingress. Each enclosure undergoes airflow testing to ensure performance meets specifications.
2. Challenge: Lightweight Design with Structural Integrity
The enclosure must be lightweight to enhance energy efficiency, yet strong enough to support heavy internal battery modules and withstand mechanical shock.
Lösung: Through finite element analysis (FEA), we optimized the internal structure with lightweight reinforcing ribs, improving structural strength by 25% without increasing the overall weight.
3. Herausforderung: Hohe Konsistenz in der Batch-Anpassung
The customer required 1,200 units with uniform appearance, size, and performance across all units.
LösungAutomatisierte Produktionslinien und Statistische Prozesssteuerung (SPC) werden zur Überwachung von Verarbeitungsparametern in Echtzeit verwendet. Die Probenaufnahme wird pro 50 Einheiten durchgeführt, um die Stabilität der Größe, der Oberflächenverbindung und der funktionellen Leistung zu gewährleisten.
4. Challenge: Compatibility with Standard Battery Modules
The enclosure must seamlessly accommodate standard battery modules and BMS components.
Lösung: We used laser positioning technology to ensure the accuracy of mounting rails and component slots within ±0.01mm. Pre-production sample assembly was conducted with the client’s hardware to verify compatibility before mass production.
Projektergebnisse
- Delivery: 1,200 units completed and delivered 7 days ahead of the 45-day schedule, with a 100% pass rate in all tests.
- Performance: Enclosures operate stably in both mobile and stationary applications, with no overheating, dust accumulation, or structural issues reported. The lightweight aluminum design has contributed to a 12% improvement in energy efficiency for the client’s battery systems.
- Partnership: The client signed a 3-year strategic cooperation agreement, appointing Sanjun Hardware as the exclusive sheet metal enclosure supplier for its full line of battery pack products.
