According to the Announcement of the State Administration for Market Regulation on the Implementation of Compulsory Product Certification Management for Lithium ion Batteries and Other Products (No. 10 of 2023), CCC certification management will be implemented for lithium-ion batteries, battery packs, and mobile power banks from August 1, 2023. Starting from August 1, 2024, those who have not obtained the CCC certification certificate and marked the certification mark are not allowed to leave the factory, sell, import or use it in other business activities. If you need to consult the CCC certification for batteries and mobile power supplies, please contact Shenzhen Element Testing Co., Ltd. or click to view the "China Compulsory Certification CCC | 3C Certification - FAQ" for lithium-ion batteries and battery packs/mobile power supplies.

However, how should mobile power banks that have obtained CCC certification cope with market supervision inspections at all levels? This involves the interpretation of the GB/T 35590-2017 standard in this article, or refer to the "Implementation Rules for Quality Supervision and Sampling of Mobile Power/Lithium ion Batteries and Battery Pack Products (2024 Edition) (Official Edition)"

On December 29, 2017, the National Standards Committee released the national standard GB/T 35590-2017 "General Specification for Mobile Power Sources for Information Technology Portable Digital Equipment", which was officially implemented on July 1, 2018. The control scope of the national standard GB/T 35590 for mobile power banks is as follows: Mobile power banks refer to non fixed power supply systems composed of batteries or battery packs, corresponding circuits, and casings, which can provide stable DC output and are not more than 18kg in weight and can be carried by users. This standard is applicable to portable digital devices with input voltage not exceeding 250V, output DC voltage not exceeding 60V, single port output current not exceeding 5A, and mobile power supplies using wired output.

GB/T 35590-2017 specifies the technical requirements, test methods, quality assessment procedures, marking, packaging, transportation, and storage of portable power banks for digital devices. Especially regarding the regulations on rated capacity, rated energy, environmental adaptability, and safety. This will provide more accurate technical basis for subsequent product design and development, supervision and spot checks, and transportation identification. The standard specifies the definitions of various terms and sets specific requirements for various aspects of mobile power banks, including appearance labeling, performance, safety protection, safety, electromagnetic compatibility, environmental adaptability, and limits of restricted substances. For example, the cycle life of a mobile power bank should not be less than 300 times, and the product must have over impulse protection, over discharge protection, short circuit protection, overload protection, misoperation protection, etc.

1) GB/T 35590-2017 Testing Items:

2) Label requirements:

In the GB/T 35590 standard, the appearance and labeling requirements for mobile power banks are as follows:

Appearance requirements:

The surface is clean, without obvious deformation or mechanical damage, and the interface contacts are not corroded;

There is a necessary mobile power bank label on the surface, and the label is clear;

The output and input interfaces should be clearly labeled for easy connection;

The interface, buttons, battery indicator (or lighting), warning language, etc. are clearly marked.

Requirements for identification of mobile power bank body:

Name and model of mobile power bank;

Manufacturer's name, trademark or identification mark;

Rated input voltage and current, rated output voltage and current;

Rated capacity (portable power bank);

Type and rated energy of battery or battery pack;

Multiple output ports, the total current value of the same input voltage should be identified, and the rated output voltage and current of each output port should be marked near it.

3) Virtual labeling issue of mobile power bank capacity:

One is that manufacturers directly falsely label large battery capacities, which belongs to false labeling;

The second is that manufacturers use the capacity of the battery cells inside the power bank to represent the output capacity of the entire power bank. According to the law of conservation of energy, as long as there is energy conversion, there is energy loss. In fact, the output of a mobile power bank cannot achieve 100% conversion, and the loss is constant. Therefore, consumers usually feel that the capacity of the mobile power bank in actual use is smaller than the capacity claimed by the manufacturer.

4) Compliance requirements and common questions

4.1) Identification result analysis:

requirement:

Name and model

manufacturer

Rated input and output voltage and current

Rated capacity

Types and energy of batteries

Current values of each output port and total current value

The common questions are:

a) Not labeled with the rated capacity of the portable power bank (only labeled with battery capacity or energy)

b) Rated input and output voltage and current

c) The battery type is not specified or the battery energy is not indicated

d) Multi port output does not indicate the total current value

e) Multiple port outputs with different current values not differentiated

4.2) Analysis of Effective Output Capacity Results at Room Temperature

requirement:

The effective output capacity (C, unit: Ah or mAh) is obtained by multiplying the time (T, unit: h hours) taken to discharge at a current of 1.0 Iout until the cut-off point under the condition of an ambient temperature of 23 ℃± 2 ℃, after charging according to regulations and leaving it for 0.5h to 1h, by the current of 1.0 Iout (unit: A or mA). After the experiment is completed, let it sit for 2 hours and visually inspect its appearance.

The effective output capacity should not be lower than the rated capacity, and the appearance of the portable power bank should have no obvious deformation, and should not explode, deflate, ignite, leak or rupture.

Common problems include:

a) Insufficient battery cell capacity or low circuit design conversion rate

b) Multi port output does not indicate the maximum total current value or the total current value is too large

c) Poor consistency of mobile power bank capacity, unstable voltage and capacity

5) Regulations on Civil Aviation Passengers Carrying "Power banks" for Boarding

Shenzhen Element Testing Co., Ltd. (referred to as Element) focuses on providing testing and compliance services for battery/mobile power and electronic atomizer enterprises.

The Element laboratory is equipped with dozens of advanced detection instruments and equipment, such as imported simulated smoking machines (Vaping Machines), liquid chromatography triple series quadrupole liquid chromatography-mass spectrometry (LC-MS-MS), inductively coupled plasma mass spectrometry (ICP-MS), gas chromatography-mass spectrometry (GC-MS), inductively coupled plasma emission spectrometer (ICP-OES), high-performance liquid chromatography (HPLC-DAD), gas chromatography (GC-FID/ECD/TCD), ion chromatography (IC), X-ray fluorescence spectroscopy (XRF), electronic cigarette life testing machine, pressure relief safety tester, pressure relief safety tester, glow wire tester, needle flame tester, IPX3, IPX4 testing Box, salt spray testing box, constant temperature and humidity box, mechanical testing system, battery pack drop stacking testing machine, electrostatic discharge (ESD) tester, etc.

The staff of Element Laboratory have a bachelor's degree or above and have worked in the field of testing and compliance services for many years. Among them, the engineer of the electronic atomizer project is one of the first senior experts in China engaged in electronic atomizer testing and compliance services.

Element adheres to the research of laws, regulations, and testing standards, continuously delivers the latest legal and regulatory information to customers, completes the method validation of new testing standards in the first time, and applies them to the testing of related products.