National Standard for Lithium - Ion Batteries GB31241

　　GB31241 is a significant national standard in China that pertains to lithium - ion batteries and battery packs used in portable electronic products. This standard, officially titled "Safety Requirements for Lithium - Ion Cells and Batteries Used in Portable Electronic Equipment", was first implemented on August 1, 2015, and has been updated since then, with the latest version being GB31241 - 2022.

　　Scope of Application

　　GB31241 is applicable to lithium - ion batteries and battery packs utilized in portable electronic products. Examples of such products include portable office equipment like laptops and PDAs, as well as mobile communication devices such as mobile phones, cordless telephones, Bluetooth headsets, and walkie - talkies. It's important to note that although a list of examples is provided, the standard may also cover other unlisted portable electronic products.

　　Safety Requirements

　　This standard sets forth comprehensive safety requirements to ensure the safe use of lithium - ion batteries in portable electronics. In terms of electrical safety, it requires measures to prevent over - voltage charging, over - current charging, under - voltage discharging, over - load, and short - circuit. Battery manufacturers need to design and implement effective protection circuits to safeguard against these potential electrical hazards. For example, over - voltage charging protection circuits should be able to detect when the battery voltage reaches a dangerous level during charging and cut off the charging current to prevent the battery from overheating or bursting.

　　Regarding environmental safety, the standard stipulates requirements for battery performance under various environmental conditions. This includes tests for low - air - pressure environments, temperature cycling, vibration, acceleration shock. Batteries must be able to withstand these environmental stresses without significant degradation in performance or safety risks. For instance, in a temperature - cycling test, the battery is repeatedly subjected to a range of high and low temperatures to simulate real - world usage conditions, and it should maintain its integrity and functionality throughout the test.

　　The standard also addresses the safety of the battery - pack protection circuit. It requires that the protection circuit has the ability to handle high voltages, ensuring that in the event of a malfunction, the battery pack remains safe. This involves aspects such as proper insulation and the ability to withstand electrical surges.

　　Significance of the Standard

　　The implementation of GB31241 has far - reaching significance. For consumers, it provides a higher level of safety assurance when using portable electronic products powered by lithium - ion batteries. By ensuring that batteries meet strict safety requirements, the risk of battery - related accidents such as fires or explosions is significantly reduced. For the industry, the standard promotes healthy competition. Manufacturers are compelled to improve the quality and safety of their lithium - ion battery products, which in turn drives innovation in battery design, materials, and manufacturing processes. It also helps to standardize the market, making it easier for consumers to choose reliable products and for regulatory authorities to enforce safety regulations. Overall, GB31241 plays a crucial role in enhancing the safety and quality of lithium - ion batteries in portable electronic products in the Chinese market.

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