Projects related to GB31241 portable lithium batteries

Series of lithium battery testing products GB31241

Lithium-ion batteries and accumulators for portable electronic devices: safety requirements

For portable electronic technology products, 18650 manufacture GB31241 can be applied to lithium-ion batteries and battery packs, primarily aimed at mobile electronic information devices not exceeding 18KG, which are primarily intended to be used by students and often carried by managers. The following are the main research examples:

Portable office products, such as laptops, PDAs, etc. :

Mobile communication products, such as mobile phones, cordless phones, Bluetooth headsets, walkie-talkies, etc.

Portable audio and video products, such as portable TVs, portable DVD players, MP3/MP4 players, cameras, camcorders, and recorders.

Other portable products include electronic navigation devices, digital photo frames, game consoles, and e-books.

A product design not listed above is not necessarily outside the scope of this standard because the portable electronic technology product development listed above does not include all products of the enterprise.

Lithium battery sample quantity requirements for GB31241

There are 27 main battery test samples and 14 battery test samples;

33 samples of battery packs, 17 samples:

For batteries and battery packs without protective circuits in themselves, but with protective circuits in their chargers or in electronic products powered by them, at least five electronic products powered by them must also be submitted.

GB31241 detection technology project for potassium batteries

The battery safety test consists of the following: room temperature external short circuit, high temperature external short circuit, overcharge, and forced discharge of the battery;

Battery environmental safety tests: low voltage, temperature cycle, vibration, accelerated impact, drop, extrusion, heavy impact, heat abuse, combustion injection;

Tests to ensure battery pack environmental safety: low pressure, temperature cycle, vibration, accelerated impact, drop, stress release, high temperature use, washing, flame retardant requirements;

Battery pack electrical safety test: overvoltage charging, overcurrent charging, undervoltage discharge, overload, external short circuit, reverse charging, and electrostatic discharge;

Safety management requirements for battery protection circuit systems: overvoltage charging environmental protection, overcurrent charging protection, undervoltage discharge protection, overload protection, short circuit protection, high voltage resistance;

System protection circuit safety requirements: charge voltage control, charge current control, discharge voltage control, discharge current control, and charge and discharge temperature control.

Common test items for lithium batteries

IEC62133-2, the safety standard for rechargeable lithium batteries, was introduced by the European Union and is globally recognized as the most authoritative certification. It evaluates the safety and dependability of lithium batteries and batteries in different failure scenarios. The comprehensive range of tests includes short circuit tests at room temperature and 55 degrees, stress testing for housing durability, free fall tests, heat abuse tests, squeeze and overcharge tests, forced discharge tests, mechanical shock tests, vibration tests and forced internal short circuit tests.

High-risk items: heat abuse test, extrusion test, 55-degree short circuit test, forced internal short circuit test, etc.

For non-rechargeable lithium batteries, IEC60086-4 is the European Union's safety standard. There are several main test items, including altitude simulations, temperature cycles, vibrations, mechanical impacts, external short circuits, weight impacts, extrusion tests, forced discharge tests, abnormal charge tests, free drop tests, heat abuse tests, incorrect installation tests, overdischarge tests, etc.

In October 1985, UL 1642 was first launched in the United States for lithium cell safety. It has become the most widely accepted certification worldwide for evaluating battery enterprise safety and reliability standards. This authoritative data standard primarily focuses on the cell itself. The main technical tests of UL 1642 include short circuit tests at room temperature and at 55 degrees, overcharge tests, extrusion tests, heavy impact performance tests, mechanical design impact tests, vibration analysis tests, hot box tests, continuous temperature impact tests, high altitude simulation software tests, and ejection tests.

The 5UL2054 is a versatile testing tool for both lithium-ion batteries and battery packs. It can be used for products with either primary (non-rechargeable) or secondary (rechargeable) batteries as power sources. These batteries may include a Gaffani battery or multiple parallel or tandem lithium-ion batteries, which convert chemical energy into electricity through a reaction. The UL2054 test covers various aspects such as electrical tests (short circuit, overcharge, and limited power supply), mechanical tests (squeeze, impact, acceleration, and vibration), battery shell integrity, drop resistance, static strength up to 250N, release under pressure test, fire safety test, projectile resistance, environmental testing, and high temperature cycling.

In UL2056 there are six high-risk items: overcharge test, power limit test, temperature rise test, capacity verification test, temperature rise test, abnormal overcharge test, etc.

Charged lithium batteries, abnormal operation, lithium battery short circuits, vibration tests, shell pressure tests, mechanical strength tests, creepage distances, electrical gaps, insulation distances, heat and fire resistance, hot wire tests, ball pressure tests, etc.