1. Product Overview
Specialized NdFeB magnets engineered for wireless charging systems, delivering exceptional magnetic strength in compact form factors while maintaining superior stability. Widely used in portable devices including smartphones, earbuds, and smartwatches. Customization options include dimensions, shapes, coatings, and polarity configurations to meet the diverse requirements of end products.
2. Technical Parameters
Product Name: Wireless Charging Magnet
Magnet Grade: N45 (Br ≥13.8 kGs, Hcj ≥10.8 kOe)
Dimensions: L12mm × 4mm × 2mm (Customized)
Dimensional Tolerance:Length±0.05mm, Width±0.05mm, Thickness±0.05mm
Operating Temperature: ≤80°C (High-temp version customized)
Density≥7.5 g/cm³
Surface Magnetic Field: 4,500 Gs (single magnet)
Magnetic Field : 1.80 mWb (measured by fluxmeter)
3. Manufacturing Process
Special-Shaped Cutting: Performed using dedicated non-standard wire-cutting equipment for non-square/non-circular geometric machining.
Grinding & Shaping: Used for complex structures and high-precision contour finishing to ensure dimensional and geometric tolerances.
Demagnetization Treatment: Initial demagnetization followed by precise magnetization to prevent magnetic deviation after assembly.
Laser Engraving & Marking: Marks the N-pole polarity and supports custom patterns or serial numbers as per customer requirements.
4. Surface Treatment & Plating
To enhance corrosion/wear resistance:
Default Plating: Triple-layer Ni-Cu-Ni (customized)
Standard Thickness: Ni (3μm) + Cu (5μm) + Ni (4μm) (customized)
5. Appearance & Dimensional Inspection
All products undergo strict QC:
Manual inspection (micrometer/caliper)
Visual inspection (800-1200 lux, 20-750px distance)
2D optical measurement (for irregular geometries)
CCD automated sorting & full inspection
Flux testing (batch consistency verification)
6. Reliability Testing
6.1 Neutral Salt Spray Test (NSS)
Temperature: 35°C ±2°C
Salt settlement: 1-2 ml/2000px² per hour
pH: 6.5–7.2
Duration: 12h/24h/48h (customized)
6.2 Temperature Demagnetization Test
80°C oven for 2h (customized duration)
Demagnetization rate ≤10% = Pass
- Simulates real-world thermal stability.
7. Packaging Process
Professional magnetic-safe packaging:
Comprehensive inspection (magnetic properties, dimensions, appearance)
Uniform magnetization and alignment
Custom quantitation/labeling per box
Vacuum sealing + magnetic shielding/buffer pads
Master cartons with moisture, collision, and interference protection
(Custom packaging available)
8. Application Fields
Consumer Electronics: Magnetic-attach charging, foldable screen hinge charging
Smart Mobility: In-vehicle phone charging, new energy vehicles
9.Usage Precautions
Prevent impact and dropping
Reject defective products( appearance/dimensions)
Uniformly magnetize passed items and arrange neatly
Quantitative boxing and Quantitative labels
Vacuum packaging with magnetic-proof spacers and cushion pads
10. Customization & Services
We support:
Dimensions/shape/plating (layers, thickness, color)
Polarity & magnetic strength adjustments
Laser marking (logos/serial numbers)
Special encapsulation & pull-force testing
Request samples, datasheets (MSDS/RoHS), or certifications (ISO9001, IATF16949, etc.) from sales engineers.
11.Company Introduction
Dongguan Jinconn New Materials Holdings Co., Ltd specializes in the research, development, production, and sales of high-performance magnetic materials. Upholding the core philosophy of "Technology as the foundation, Quality as the soul," the company is committed to becoming a global leader in magnetic material solutions. Its products are widely used in cutting-edge fields such as new energy vehicles, intelligent manufacturing, electronic communications, automation equipment, and medical devices, earning strong recognition and trust from clients both domestically and internationally.
.png)
