Wireless Charging Module Standards: Technical Guide

Wireless Charging Module Standards: Technical Guide

Wireless charging modules must comply with international standards to ensure safety, interoperability, and efficiency. Below is a breakdown of key standards governing wireless power transfer (WPT) technology.

1. Qi Standard (WPC – Wireless Power Consortium)

- Version: Qi v1.3 (2023) / Qi v2.0 (2024, MagSafe-compatible)
- Power Levels:

• BPP (Baseline Power Profile): 5W (5V/1A)

• EPP (Extended Power Profile): 15W (9V/1.67A)

• Qi v2.0 (Extended Fast Charge): Up to 30W (with EPR support)
  - Frequency: 110–205 kHz
  - Key Requirements:

• Foreign Object Detection (FOD)

• Thermal management (≤40°C surface temp)

• Efficiency ≥70% at 5W, ≥75% at 15W

Applications: Smartphones, wearables, earbuds (e.g., iPhone, Samsung Galaxy)

2. AirFuel Alliance (A4WP & PMA Merged Standard)

- Resonant Mode (Rezence):

• Frequency: 6.78 MHz

• Power: Up to 50W (scalable to 300W)

• Key Feature: Spatial freedom (multi-device charging)
  - Inductive Mode (PMA Legacy):

• Frequency: 277–357 kHz

• Power: 5W–15W

Applications: Laptops, medical devices, industrial tools

3. SAE J2954 (Automotive Wireless Charging)

- Power Levels:

• WPT1: 3.7 kW (Light-duty vehicles)

• WPT2: 7.7 kW

• WPT3: 11 kW (High-speed charging)
  - Frequency: 85 kHz (Z-Class)
  - Alignment Tolerance: ±75mm (for parking misalignment)
  - Efficiency Target: ≥85% (grid-to-battery)

Applications: EV wireless charging (e.g., BMW, Tesla)

4. IEC 61980 (Global EV Wireless Standard)

• Harmonizes with SAE J2954 but includes additional EMI/EMC requirements

• Covers 3.7 kW to 22 kW dynamic & static charging

5. Military & Industrial Standards

Compliance Testing & Certification

To ensure market acceptance, modules must pass:
✔ Qi Certification (WPC-authorized labs)
✔ FCC/CE/EMC (for radiated emissions)
✔ IEC 62368-1 (Safety for IT equipment)
✔ EN 303 417 (EU regulation for 6.78MHz systems)

Golden Eagle’s Compliance-Ready Solutions

We supply pre-certified wireless charging coils for:

• Qi v2.0 (15W–30W) with <5% FOD failure rate

• SAE J2954-ready automotive-grade coils

• 6.78MHz AirFuel modules with 88% efficiency

• Need a Standard-Specific Design?
  [Contact us: what'sapp/wechat/phone +8613713215104]