GB 31241-2022 Safety Technical Specification for lithium ion batteries and batteries for portable electronic devices is a new standard for lithium battery testing.

A new lithium battery testing standard, nmp recovery system GB 31241-2022, "Safety Specifications for Portable Electronic Lithium-ion Batteries and Battery Packs," was officially introduced on January 1, 2024. The formulation, promulgation and implementation of relevant safety standards contribute to the healthy and sustainable development of the lithium-ion battery industry.

The use of lithium-ion batteries in transportation, n methyl 2 pyrrolidone solvent storage, and recycling can present potential safety concerns. Factors such as high temperature, overcharge, overdischarge, and short circuit may lead to issues like battery leakage, fire, and even explosion. In response to this, GB 31241-2022 has been established as a technical specification for the safety of lithium-ion batteries and accumulators used in portable electronic products. This document outlines the fundamental principles necessary for designing and producing safe lithium-ion batteries. It's important to understand that while this document focuses on basic safety requirements to protect people and property, it does not address performance or functional aspects.

Research and development of information technology and processes will inevitably require further revision of this document. nmp chemical There are several hazards associated with lithium-ion batteries and battery packs that are included in this document.

Leaks can directly cause chemical corrosion on the human body or indirectly damage battery-powered electronics' insulation

Electric shock, fire, etc. dangers:

Fire, which directly burns the body or poses a fire hazard to battery-powered electronic devices; Explosion, which directly injures the body or damages equipment;

Overheating, causing direct burns to the human body, or reducing insulation levels and safety component performance, or resulting in flammable liquid combustion. A leak may result from internal or external stress due to shell damage, while a thermal runaway may lead to fire and explosion. A short circuit inside the battery and oxidation of the battery material may result in thermal runaway.

Follow the following priorities when choosing an instructional design research approach for batteries or battery packs;

Prioritize the development of materials with high safety, and avoid materials that can easily lead to thermal runaway in the process of enterprise use;

Secondly, if the above principles cannot be implemented, protective devices should be designed to reduce or eliminate the possibility of danger, such as installing protective devices;

In addition, if the above measures do not completely eliminate hazards, then the remaining hazards must be marked.

Describe the measures in detail.

According to GB 31241-2022 "Portable electronic lithium-ion batteries and batteries, Safety Technical Specifications", the battery must pass the following safety tests:

Low pressure at 7.1

Battery is fully charged following 451, then placed in a direct box at 20 °C + 5 °C. After vacuuming, the box pressure is reduced to 11.6 kPa (simulated altitude of 15x240m) for 6 hours.

According to GB/T 2423.21, analysis test research methods should be in accordance with the relevant laws. Batteries should not be prone to fire, explosion, or leakage.

Temperature Cycle 7.2

a) Increase the temperature of the test chamber to 72 ° C + 2 ° C and maintain it for 6 hours; b) Reduce the temperature of the test chamber to -40 degrees Celsius + 2 degrees Celsius and maintain it for 6 hours; c) Repeat steps a) to B) for 10 times;

For at least 6 hours, store at room temperature between 20 °C and 5 °C.