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DINGPRECISION | Battery Enclosure Series — Article #6
Custom Manufacturing Process at DINGPRECISION
From Laser Cutting to Final Assembly - 7-Step Guide
DINGPRECISION | Dingyi Industrial Technology | May 2026
1. Introduction
When you order a custom sheet metal enclosure, understanding the manufacturing process helps you design better, communicate specifications more clearly, and set realistic expectations for lead times and costs. At DINGPRECISION, every enclosure passes through a proven 7-step process that transforms raw sheet metal into a finished, inspected, and packaged product ready for installation.
Our 15,000 sqm facility houses over 260 skilled professionals operating 15 laser cutting machines, 20 CNC bending machines, 4 robotic welding stations, and 3 powder coating lines — all under a single roof. This vertical integration eliminates supply chain delays, reduces handling damage, and ensures consistent quality at every step.
For a comprehensive overview of enclosure design considerations including material selection, structural requirements, and ventilation strategies, refer to our complete Energy Storage Enclosure Design Guide.
2. Step 1: Engineering & DFM Review
Every enclosure project begins with a Design for Manufacturing (DFM) review. Our engineering team analyzes your 3D model or 2D drawing to identify potential manufacturing issues before production begins. This proactive step eliminates costly rework and ensures your design can be manufactured efficiently.
Key checks include:
Material grade verification
Bend radius adequacy for the specified tooling
Ventilation slot geometry optimization
Gasket groove dimensional verification
Tolerance stack-up analysis for multi-part assemblies
3. Step 2: Laser Cutting (+/- 0.1mm)
DINGPRECISION operates 15 fiber laser cutting machines at 6000W power, capable of cutting mild steel, stainless steel, aluminum, and galvanized materials from 0.5mm to 12mm thickness. All machines achieve +/- 0.1mm positioning accuracy verified through automated edge inspection. Advanced nesting software optimizes material utilization to 80-85%, significantly reducing material costs. Cut edge roughness (Ra) is maintained below 3.2 microns to ensure proper gasket sealing.
Figure 1: Fiber laser cutting with +/- 0.1mm precision and automated edge quality inspection
For recommended sheet metal materials and thicknesses for battery enclosures, see our Energy Storage Enclosure Design Guide — Material Selection section.
Parameter | Specification |
Laser Type | Fiber Laser (6000W) |
Positioning Accuracy | +/- 0.1mm |
Material Range | 0.5mm – 12mm |
Materials | Mild Steel, SS 304/316, Aluminum, SGCC Galvanized |
Edge Roughness (Ra) | < 3.2 microns |
Material Utilization | 80–85% (nesting optimized) |
Machines Available | 15 units |
4. Step 3: CNC Bending (+/- 0.5 Degree)
Cut flat parts move to 20 CNC press brakes that transform them into 3D enclosure components. Our bending capacity ranges from small precision brackets to full-height cabinet frames up to 8.4 meters. Each bend is analyzed for optimal punch and die combination. First-article pieces undergo CMM angle verification with +/- 0.5 degree accuracy maintained throughout production. CNC programs incorporate material-specific spring-back compensation, typically 1-3 degrees for SGCC galvanized steel.
Figure 2: CNC press brake bending enclosure panels with +/- 0.5 degree accuracy
Proper bending design is critical for structural integrity. Learn about thermal management and structural considerations in our Battery Cabinet Thermal Management & Ventilation Design guide.
Parameter | Specification |
CNC Press Brakes | 20 units |
Max Bending Length | 8.4 meters |
Angle Accuracy | +/- 0.5 degree |
Verification | CMM first-article inspection |
Spring-back Compensation | Material-specific (1–3 degrees for SGCC) |
Max Material Thickness | 12mm (mild steel) |
5. Step 4: Welding & Assembly
Precision welding forms the structural backbone of every enclosure. Our welding team combines robot welding for consistent repetitive joints and skilled manual welding for complex geometries. All welded assemblies undergo visual inspection, dimensional verification, and where specified, weld strength testing including tensile and fatigue testing per customer requirements.
Welding processes available:
Robotic MIG/MAG welding — high-speed production with consistent quality
TIG welding — for stainless steel and aesthetic visible welds
Spot welding — for sheet-to-sheet connections
Plasma welding — for thicker material sections
The choice between wall-mounted and floor-standing formats affects welding complexity. Compare configurations in our Wall-Mounted vs Floor-Standing Enclosures guide.
6. Step 5: Surface Treatment
Surface preparation is critical for coating adhesion and long-term corrosion resistance. All welded parts undergo multi-stage pretreatment including degreasing, phosphating (or chromating for aluminum), and passivation before coating application.
Pretreatment stages:
Degreasing — remove oils, cutting fluids, and contaminants
Rinsing — water wash to remove chemical residues
Phosphating — create conversion coating for paint adhesion (steel)
Chromating / Zirconium conversion — for aluminum substrates
Drying — hot air drying before coating
For a detailed comparison of powder coating versus liquid painting processes, performance, and cost analysis, see our Powder Coating vs Liquid Painting guide.
7. Step 6: Powder Coating
DINGPRECISION operates 3 automated powder coating lines capable of producing enclosures in any RAL color. The electrostatic spray process ensures uniform coating thickness of 60-120 microns with excellent edge coverage. Our curing ovens maintain precise temperature profiles for optimal film formation and adhesion.
Powder coating specifications:
Coating thickness: 60–120 microns
Color range: Full RAL color chart
Finish options: Glossy, matte, textured, fine-texture
Salt spray resistance: 500–1000 hours (with proper pretreatment)
UV resistance: Suitable for outdoor applications
Curing temperature: 180–200°C for 15–20 minutes
Figure 3: Automated powder coating line with electrostatic spray and curing oven
Proper IP protection requires careful attention to coating coverage at seams and joints. Learn about IP ratings and sealing requirements in our IP Ratings Guide for Battery Enclosures.
Parameter | Specification |
Coating Lines | 3 automated lines |
Coating Thickness | 60–120 microns |
Color Options | Full RAL chart |
Salt Spray Resistance | 500–1000 hours |
UV Resistance | Outdoor-grade |
Curing | 180–200°C, 15–20 min |
8. Step 7: Final Assembly, Inspection & Packaging
The final stage integrates all components into a finished enclosure. This includes hardware installation (hinges, locks, latches), gasket fitting, accessory mounting, and functional testing.
Quality assurance protocols:
Dimensional inspection against drawing tolerances
Surface quality visual inspection (no scratches, bubbles, or runs)
IP rating testing (spray test for IP54/IP65)
Functional hardware check (door swing, lock operation, gasket compression)
Packaging with corner protectors, moisture barriers, and custom crate for sea freight
Figure 4: Finished enclosures undergoing final quality inspection and packaging
Enclosure Type | Prototype | Production (50–100 pcs) | Production (500+ pcs) |
Simple Wall-Mounted | 7–10 days | 15–20 days | 20–25 days |
Standard Floor-Standing | 10–15 days | 15–25 days | 25–30 days |
Complex Multi-Compartment | 15–20 days | 20–30 days | 30–40 days |
Custom with Special Finish | 15–20 days | 25–35 days | 35–45 days |
Get competitive pricing within 24 hours for your battery enclosure project
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