Wireless charging equipment CE certification and FCC certification

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Update time : 2024-04-30

As the application of wireless charging on mobile phones and TWS Bluetooth headsets becomes more and more popular, wireless charging technology is currently accelerating its extension to other types of terminals. In order to help related companies' products gain recognition in the European Union and North American markets in a relatively short period of time, this article mainly provides a brief analysis and explanation of the EU and US market access requirements for wireless charging equipment, that is, the requirements related to CE certification and FCC certification of wireless charging equipment. .

1. Brief analysis of wireless charging technology

At present, there are four basic wireless charging methods: electromagnetic induction, magnetic resonance, electric field coupling and radio wave. Their relevant technical characteristics are shown in Table 1:

Table 1 Wireless charging technology classification and technical characteristics

type	Electromagnetic induction type	magnetic resonance	electric field coupling	Radio wave type
Transmission power	10W level	1kW level	10W level	1W level
Transmission distance	Several mm to several centimeters	How many centimeters to how many meters?	Several mm to several centimeters	More than 10m
Use frequency band	10kHz~1MHz	1MHz~100MHz	100kHz~10MHz	Medium wave ~ fine wave
Charging efficiency	70%~90%	40%~60%	60%~90%	very low
advantage	Short distance charging, high efficiency	Long distance high power charging	Short-distance charging, high efficiency, no fixed position	Suitable for long-distance low-power charging
shortcoming	It requires precise positioning for charging and will generate heat.	Low conversion efficiency, consider electromagnetic exposure	Larger size, less power	Very low efficiency, low power, long charging time

2. CE certification requirements

1. Product classification

Wireless charging equipment entering the EU market can be divided into three categories according to its wireless technology and functions. The specific requirements and test standards are shown in Table 2:

Table 2 Classification and requirements of wireless charging equipment

Wireless charging device categories	LVD Directive - Electromagnetic Exposure	RED command			EMC directive
		Clause 3.1a	Clause 3.1b	3.2 Terms
Only energy transmission, no data communication	EN IEC 62311、EN 50364、EN 62369-1	No relevant requirements			Product standards such as EN 55011
Power transmission and data communication in the same frequency band	No relevant requirements	EN IEC 62311、EN 50364、EN 62369-1	FIND EN 301 489-1/3	FIND EN 303 417	No relevant requirements
The frequencies used for energy transmission and data communications are in different frequency bands	According to regulatory requirements, this can be done in the following two situations. (1) If the frequency bands for power transmission and data communication are specified in the current ETSI standards, they shall be carried out in accordance with the corresponding ETSI standards. (2) The energy transmission part meets product standards such as EN 55011, and the data communication part meets the corresponding ETSI standards.

2.ETSI EN 303 417 test requirements

The frequencies allowed by ETSI EN 303 417 for wireless charging equipment are shown in Table 3, and the relevant working modes and test requirements are shown in Table 4.

Table 3 Frequencies allowed by ETSI EN 303 417

Frequency Range	frequency band	application
1	19kHz-21kHz	Wireless charging
2	59kHz-61kHz	Wireless charging
3	79kHz-90kHz	Wireless charging
4	100kHz-119kHz	Wireless charging
	119kHz-140kHz	Wireless charging
	140kHz-148.5kHz	Wireless charging
	148.5kHz-300kHz	Wireless charging
5	6765kHz-6795kHz	Wireless charging

Table 4 Required working modes and related test requirements for wireless charging equipment

	Mode 1: idle mode	Mode 2: Charge adjustment mode	Mode 3: Data communication mode	Mode 4: energy transfer mode
test layout	Single device layout	Combined equipment layout	Charging position alignment	Charging position alignment
Fixed component function	emission	transmit and receive	transmit and receive	transmit and receive
Moving parts functionality	not applicable	transmit and receive	transmit and receive	transmit and receive
Test scenario requirements	Launch test of fixed part/charging base	1) The manufacturer should declare the typical operating modes of the WPT system. 2) The manufacturer should declare the maximum communication distance D, and the test should be conducted at the maximum communication distance. 3) If the maximum communication distance is greater than 1 meter, each transmitting part should be tested separately.	All WPT system components should be tested together, with the primary coil (in the stationary assembly) and secondary coil (in the mobile device) placed in worst-case alignment.

3. FCC certification requirements

According to FCC regulations, wireless charging equipment with an operating frequency greater than 9 kHz is considered to be intentionally emitting. According to its wireless technology and functions, it needs to comply with the relevant requirements of FCC part15 or part18. See Table 5 for details.

Table 5 Classification and requirements of wireless charging equipment

Wireless charging device categories	FCC part 15	FCC part 18
Only energy transmission, no data communication	not applicable	Be applicable
Power transmission and data communication in the same frequency band	Be applicable	not applicable
The frequencies used for energy transmission and data communications are in different frequency bands	Be applicable	Be applicable

In addition, wireless charging equipment also needs to comply with the electromagnetic exposure requirements of KDB 680106 D01 document and obtain FCC authorization, as follows:

1. Wireless charging equipment that meets the requirements of Part 15

It is necessary to make an "Equipment Compliance Review" (ECR) to the FCC and inquire about the minimum radio frequency exposure compliance test distance to ensure compliance with the evaluation method, which is mainly evaluated based on electromagnetic field measurement results. The general testing distance for mobile equipment used away from the human body is 20cm, and the general testing distance for portable equipment is 5mm or 0mm.

2. Wireless charging equipment that meets the requirements of Part 18

Wireless charging equipment authorization can be obtained through Supplier Declaration of Conformity (SDoC) or certification. For devices authorized under SDoC, the responsible party must retain a copy of the test report to demonstrate compliance in accordance with KDB 865664 D02 and provide it to the FCC upon request; applications for equipment authorized under certification should include an RF exposure assessment and comply with the requirements of KDB 447498.

Except for wireless charging equipment that meets the six requirements described in Article 5.2 of KDB 680106 D01v04 (see Table 6), it does not need to obtain authorization directly from the FCC. In other cases, regardless of the use of SDoC or certification authorization, the consent of the FCC (manufacturer) is required. The KDB inquiry process should be used to obtain FCC consent), otherwise the authorization will be deemed invalid.

Table 6 KDB 680106 D01v04 6 requirements described in Article 5.2

1.	Power transmission frequency below 1MHz
2.	The output power of each transmitting unit (such as coil) is less than 15W
3.	Provide maximum allowable loading of client equipment in physical contact with the transmitter
4.	Only suitable for mobile devices compliant with FCC part 2.1091
5.	Demonstrate that the total magnetic field (H-field) strength is less than the applicable MPE limit when those coils are simultaneously energized at or anywhere beyond 15 cm around the device and 20 cm from the surface of all coils designed to transmit simultaneously 50%;
6.	For systems with more than one radiating structure, that is, according to the design conditions, when the system is fully loaded (that is, when the client absorbs the maximum available power), and all radiating structures are energized at the same time and operating at maximum power, the requirements specified in (5) above are met. condition,