Recently, a child telephone watch in sichuan province has raised concerns among parents. The surveillance video showed a flash of sparks when the watch was placed on the table, followed by smoke. According to the parents, the watch had to be sent to the maintenance centre to determine the reasons for the response to the branding。
Journalists interviewed experts in security management around the telephone watch “how overall safety works” “why self-fired” “how consumers choose to buy and use it”。
“the lithium batteries of a fully qualified product are typically subjected to simulation tests under a variety of extreme conditions, such as fall, needles, impact, water immersion, etc., and are therefore less likely to be self-fired during normal use.” according to wang xinhua, a professor-level professor of smart emergency techniques and equipment at guangdong university of technology, which has a long-standing interest in the safety of consumer electronics batteries, children's telephone watches, as portable electronics in close proximity to them, are highly safe for batteries。
He analysed three possible reasons for spontaneous combustion. One is that the battery selected by the manufacturer is of sub-standard quality, e. G., without over-capacity protection, prone to fire and even explosion as a result of the heat out of control of the battery during its use; the other is that the system integration capacity of the watch manufacturer is inadequate, e. G., the surface is inadequate for water protection and the electrical performance of circuit boards, so that, even if the battery selected is qualified, it may cause explosion due to electrical performance defects; and the third is inappropriate use, e. G., the use of non-charging chargers may result in battery combustion due to, for example, inadequate voltage。
“usually the highest risk when charged, most spontaneous combustion incidents occur during the recharge.” he said。
Consumers have been reminded to check whether products are packaged with mandatory product certification (ccc certification) for child telephone watches with telephone functions and to wear them in such a way as to avoid falling. Use shall cease immediately when a cell is found to be compressed into a deformation, abnormally hot, damaged or puncture。
“although compliance products are generally tested and qualified, parents should remind their children to avoid, to the extent possible, risk situations such as water intake, use by charging side, and long-term charging.” wang xinhua says. Xinhua
