Go homepage(回首页) Upload pictures (上传图片) Write articles (发文字帖)
The author:(作者)aaapublished in(发表于) 2014/12/17 10:35:07 Mobile power 60 batches without qualifying： Samsung millet， is on the list，
Mobile power 60 batches without qualified:-listed Samsung millet and other mobile power charging Bao, millet, Samsung-IT newsMobile power 60 batches without qualifying: Samsung millet, is on the list
Mobile power supply safety accidents occurring frequently, aimed at the vulnerability of the industry also attracted more and more attention. On December 17, the Jiangsu Provincial Bureau of quality and technical supervision issued 2014 mobile power quality analysis of product risk monitoring reports, results show that mobile power without a sampling of 60 batches comply with test standards .
Responsible for the sampling of product quality supervision and inspection and the Chief Engineer of electricity, Suzhou introduced Duan Yong, this risk monitoring based on CIAPS0001-2014 of the USB interface class mobile power standards and State administration of quality supervision inspection programmes. Product problems are: shell fire remains a major safety hazard, moreover, more issues that affect product performance, which is critical to product performance parameters of rated capacity and extremely low conversion efficiency rate.
▲ The sampling portion of mobile power products
? Flame retardant properties for some of the products do not comply with the standards
▲ Figure for part of their product conversion efficiency not up to standard
Shell is not caused by fire or explosive safety risk
As a chemical battery was a major component of the product, mobile power, if used improperly or unreasonable design of product protection mechanisms under normal use, will likely lead to fire, explosion and other accidents.
Duan Yong introduced, due to moving the power structure doesn't have a cooling channel, while lithium battery heats during the charge/discharge process, causing the internal temperature rise, is one of the factors that induce lithium battery fire, explosion.
"Standards, mobile power supply enclosure need fire protection capabilities. Detection of 27 batches shell lit will never die, no fire-retardant features, suggesting that most manufacturers for mobile power supply blank must be fire-resistant, no idea. "Duan Yong said.
Capacity deficiency problems electrical energy conversion efficiency is low
Capacity deficiency, Duan Yong pointed out that monitoring results show that 26 batches of 60 batches did not meet requirements. 10 batches of them capacity deficiency, the most serious deficiency, the battery capacity is only manufacturer to express values of 56%, that is to say, 10000mAh cell 5600mAh actually.
Experts stressed the capacity marked on the products currently sold are mobile power batteries capacity, also known as the battery, not equivalent to moving the power actually helps to release energy.
Because the battery voltage is 3.7V, not directly to the Smartphone charging, requires booster circuit transformation after the voltage to voltage 5V USB standard can charge for a Smartphone. In this process, moving the power supply's rated capacity changes.
For example 10000mAh battery, in theory, complete the mobile power to convert nominal capacity of 7400mAh, consumers should pay attention to the differences.
Duan Yong pointed out, is not the nominal capacity of the product, providing power, determines the cell energy conversion 3.7V conversion efficiency to consumers using 5V power or how much is lost in the process of power, how high utilization. This risk monitoring of the project in line with rate of 38%, the lowest conversion rate of 71.85%, so they provide the consumer with a capacity of deficiency.
Multi-brand mobile power "black list" of tips how to shop
This sampling, the 34 batches come from e-commerce platform, 26 batches from the store. Brands involved include EAGET, cooler than a Rubik's cube, Samsung, DBK dibike, MI 47 major brands of various grades of products such as millet, ranging in price from 40 dollars to 378 dollars, but none meet the inspection standards.
Experts suggest that from a security point of view, try to buy the metal shell of mobile power. Because the metal in the structure of mobile power products play a role in radiators, heat through the metal case of the lithium-ion battery can be disseminated, so as to reduce the risk of fire and explosion.
In addition, don't just covet large capacity, according to purpose select the appropriate output current, and power after charging off in a timely manner to avoid risks caused by the power for a long time.
For the price, Duan Yong reminded, for example 10000mAh product, taking into account the normal cost of materials and has more than 60 Yuan, and therefore does not recommend that consumers choose products less than 60 Yuan .
赞