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High-cost mobile power is qualified? foolish and naive!

2017-12-14 09:38:27

Personal mobile power more and more popular, but with the advent of many products, including uneven quality problems are gradually exposed, recently, the quality supervision agencies of the mobile power market spot checks, inspection of 60 batches of products without a pass The result was shocking. Check the focus for the mobile power product parameters and conversion efficiency, the risk monitoring based on CIAPS0001-2014 "USB interface class mobile power" standard and AQSIQ spot checks program. The main problems of the product are as follows: The case is not fireproof is still a major security risk. Case is not fire or explosion as a chemical battery as the main components of products, mobile power if not properly used or under normal use of product protection mechanism design is not reasonable, it may trigger fire, explosion and other safety incidents.

Due to the structure of the mobile power supply there is no special cooling channel, however, the lithium battery will generate heat in the process of charging and discharging, resulting in an increase of the internal temperature, which is one of the factors that cause the lithium battery to fire and explode. Standard requirements, the power of the enclosure need to have fire safety. Testing, 27 batches of sample lighting will not go out after the ignition, there is no fire-retardant features, indicating that most manufacturers did not attach importance to the mobile power shell fire. Capacitance deficiency problem highlights low energy conversion efficiency For capacity deficiency, the monitoring results show that there are 26 batches of samples of 60 batches of samples do not meet the requirements. Among them, 10 batches of samples suspected of capacity virtual standard, the most serious virtual standard, the battery capacity can only reach 56% of the manufacturers stated value, that is, 10000mAh batteries in fact only 5600mAh. Experts stressed that the current market sales of products are marked on the capacity of mobile power batteries, also known as battery energy, not the same as the mobile power can actually release the energy. Because the cell voltage is 3.7V, can not directly charge the smart phone, need to go through the step-up circuit conversion, the voltage rose to USB standard voltage 5V, in order to charge the smart phone. During this process, the rated capacity of the mobile power supply is changed.

For example, the battery capacity of 10000mAh, theoretically the conversion of mobile power rated capacity of 7400mAh, consumers should pay attention to the difference between the two. Not nominal capacity of the product, providing more power, conversion efficiency determines the 3.7V battery energy conversion to consumers can use the 5V power loss in the process of how much power, how high utilization. The risk monitoring, the project with a rate of only 38%, of which the lowest conversion rate of only 71.85%, it also gives consumers the feeling of the capacity of the virtual standard. Expert Weapon How to choose this sampling, 34 batches of samples from e-commerce platform, 26 batches of samples from the physical store. Involved brands include EAGET, CUBE, Samsung, DBK Dubic, MI millet and other 47 mainstream brands of various grades of products, priced from 40 yuan to 378 yuan, but none of the sampling standards. Experts suggest that from a security point of view, try to buy a metal shell mobile power. Because metal housings act as heat sinks in the product structure of the mobile power supply, the heat from the lithium battery can be dissipated through the metal housing to reduce the risk of fire and explosion. In addition, do not blindly seek large capacity, according to the use of the appropriate choice of output current, and pay attention to the power supply after the prompt termination of power to avoid the risk of prolonged power. The most important thing is to judge from the price, that is, the analysis of costs, in general, 10000mAh mobile charger, it costs more than 60 yuan, so 60 yuan of the following products will certainly exist jerry-building and efficiency issues serious But also the risk of explosion, so remind everyone in the purchase of mobile power products to price and capacity to be considered.

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