Inferior electric core, circuit board, Shell: the triple pushing hands of mobile bombs

Absrtact: You may not know that the mobile power that you carry around you may be a mobile bomb. Aqsiq in August this year launched a mobile power product quality and safety risk monitoring, the results are shocking. The testing of a total of 32 batches of samples of products, 224 pieces of sample


you may not know that the mobile power that you carry around you may be a "mobile bomb".





in August this year launched a mobile power product quality and safety risk monitoring, the results are shocking. The testing of a total of 32 batches of products, 224 samples, and these 32 batches of products have quality and safety risks. Which, 9 batches of products electrical core heavy impact test does not conform to the existence of internal short circuit when the risk of fire explosion; 28 batches of product output electrical performance test does not conform to the risk of damage to the charging equipment; 20 batches of product enclosure material flammability test does not conform to the risk of failure to fire flame on the core 17 batches of Products 0.2ItA discharge test does not conform to the existence of the capacity of virtual standard problem.





is in the rapid development phase of the mobile power industry is now urgent to rectify.





defective to build low capacity battery





in all of the product quality problems of mobile power supply, "capacity virtual standard" is the most common.





August 25, CCTV detailed report of the AQSIQ on the inspection of 32 batches of mobile power products of the detailed process, of which 17 batches of products exist in the problem of virtual standard capacity. Among them, "Millet" brand 5200 ma mobile power, "love than Cool" brand 2600 ma Mobile power, "Maitwill" Brand 12000 Ma Mobile power supply, "where to" brand 5600 Ma mobile power and "AO-yu" Brand 6500 ma Mobile power supply, such as 9 batches of product capacity deviation rate of more than 50%, That is to say, the measured value is not even half of the capacity, the virtual standard capacity of the largest product capacity deviation rate even reached 74.6%.





for the capacity of the virtual standard, 21st century Economic Report on the field of China Mobile power supply the largest manufacturing and sales base-located in Shenzhen, Huaqiang North Market, the results found that the problem of virtual scale is indeed very common.





Reporter in Huaqiang North a specialized sales mobile power products counters, pick up a 4 section of 18650 batteries composed of mobile power products, to the sales staff inquiries. Sales staff are not shy to say that the capacity of the 4 power-saving cores are about 2000 MA, so the total capacity of 4 batteries in 8000 MA, but this product is marked with a capacity of 12000 ma. He said that the virtual label capacity in the industry is a common practice, virtual standard 30% belongs to the normal situation. Sales staff also told reporters that their products are owned by their own brands of products, and some Shanzhai products are more serious phenomenon of false.





Then, the reporter came to a sales mobile power supply of the counter inquiries, the clerk told reporters that they sell each of the 18650 core capacity of only about 1200 Ma. He explained: "Counterfeit large manufacturers of counterfeit goods, generally use this capacity of only 1200 MA batteries manufacturing, even 1300 MA is very small." ”





Mobile Power manufacturer Mr. Chen told reporters that the current domestic electric core enterprise production of 18650 batteries, its standard capacity of 2200 Ma to 2800 ma. But in the production process will have some defective, the smallest capacity of less than 1000 ma. The higher the capacity of the batteries, the higher the price.





Mr. Chen gave the reporter a set of data: A 2000 MA capacity of the battery, its ex-factory price of 6 yuan; a 1800 ma capacity of the battery, the ex-factory price of 5 yuan; 1200-1600 ma capacity of the battery, the ex-factory price is only 3 yuan; lower capacity of the electric core ex-factory price is only about 2 yuan, Some are even lower.





Chen told reporters that each appliance core enterprises have their own screening equipment, can be qualified to filter out the core, the enterprise will set a standard value, meet the specifications of each section of the capacity of the standard capacity of 50 ma within the range, these standards of products known as a-class product. Under a level, there are B-Class, C-Class, D-level, and several grades, these grades are defective.





"for the formal destruction of defective products, they should be handed back to the core of the raw material suppliers, material manufacturers can be defective core dismantling, refining the useful elements inside, as new raw materials to produce new batteries. Mr. Chen told reporters.





But he also said that at present even the big battery enterprise, can do so the standard process is also very few, each enterprise's defective people to buy and resell out, this has formed a very complete industrial chain. This is also the leading cause of low capacity battery flooding in the market.





In addition, Mr. Chen also said that strict national standards for an industry is very important. For example, exports from China to foreign products, will undergo a rigorous test, the need for the rated capacity of all above the specified value.





three levels of explosion hazards





In addition to the virtual standard capacity problem, the most consumers worry about is the mobile power supply explosion hidden trouble. In recent years, the burning events of mobile power in public places have occurred frequently.





last May, the Guangzhou Subway Airport South Station discarded lithium battery short-circuit spontaneous combustion, smoke diffuse, causing the train once more station; this March, Guangzhou metro line Line 6 to Huanghuagang train, a passenger's mobile power suddenly smoke, causing a large number of passengers flurried fleeing.





reporter to a person engaged in mobile power manufacturing to consult the cause of the possible explosion of mobile power, he told reporters, batteries, battery management system and shell have security risks.





he explained that in the mobile power structure, the security barrier has 3 heavy. The first is the protection of the electric core itself. A good battery has a safety valve on its own, and in the case of a short circuit, it will not burn even if the battery is aglow. The second is the management system, that is, the circuit board, which is a step-up and step-down module, can adjust the voltage. The third is the casing, which involves the assembly process, the cathode, the cathode welding and so on.





first, the most important component of the mobile power supply is the battery core. The hidden dangers of the batteries include leakage, bulging, burning and explosion.





in the Quality Inspection Bureau's electric core heavy impact test, 32 batches of mobile power in 6 batches occurred in a fire explosion. If consumers arbitrarily use mobile power supply, so that it suffers from extrusion, acupuncture and heavy impact, such as external shocks, may cause internal short-circuit, resulting in fire and explosion.





In addition to the core, the circuit board is also the second key component of mobile power. A circuit board manufacturer Mr. Liu told reporters that in the battery structure, although the circuit board is a very small part, its cost is only 10 yuan, the total cost of mobile power only 10% to 15%, but it is in the mobile power is very important. And among them, there is a protection IC, the cost is only 1-2 yuan, for short-circuit module and Step-Up, Buck module, is to protect the security of mobile power a key component.





Aqsiq in the last inspection, inspected the mobile power output voltage, the results show that 32 batches of mobile Power sample "Output electrical performance" test only 3 batches meet the requirements. and high output voltage will cause users to charge mobile devices, the mobile power to burn out. AQSIQ tests showed that some mobile power products have a voltage of even more than 10 volts.





afore-mentioned Personage tells a reporter, some inferior mobile power supply in order to save 1-2 yuan cost, have no protection IC this part at all.




The
is finally the shell and assembly process. Reporter in the survey learned that the current domestic sales of rechargeable shell is mainly divided into plastic and metal two kinds, of which plastic shell accounted for more than 3/4. The monitoring of 32 batches of rechargeable plastic shell fire resistance test, only 5 batches meet the requirements, that is, most of the charging treasure once the electric core fire, these plastic shells will not be effective flame retardant. In addition, some of the small family workshops in the anode and cathode welding is very rough, but also easy to cause accidents.





with the frequent exposure of mobile power security incidents, manufacturers in the industry have also played a big "insurance" brand. Reporter inquires about the mobile Power brand's official website, and found that some manufacturers "for their own products to buy insurance" as a selling point, in advertising a large number of publicity.





such as Romance (romoss) Product introduction page describes: "The product has been China Ping ' an insurance 3 million U.S. dollars security liability insurance." Millet official online Introduction to the product also mentioned: "Each of the genuine Millet mobile power supply, are insured by the Chinese people insurance." Each of the amount of 500,000 yuan per person, so you use more at ease! ”





industry adjustment period coming





in the interview, several industry insiders said that the reason why the current mobile power industry access threshold low, poor product quality, disorderly competition, no GB for the entire industry to play a big reason. At present, some large manufacturers have referred to lithium battery GB and other existing GB has established its own enterprise standards, to ensure their product quality. However, due to too many shanzhai products, "bad currency to expel good currency", resulting in a lot of factory profits too thin to survive.





afore-mentioned manufacturer Mr. Liu to reporter admits, more and more people enter the mobile power this profession, cause many enterprises regardless of cost price, do bad whole industry. His group of production of mobile power friends, have been withdrawn from the industry, and some into the field of intelligent home, and some into the field of TV set-top boxes, and so the number of enterprises to change careers.





Liu told reporters that in the entire mobile power industry chain, only the upstream of the core industry is the most professional. Because the investment in the core industry is generally tens of millions of yuan, access to the technology and capital threshold are very high, so the enterprises are large manufacturers. But the downstream assembly of mobile power supply, the enterprise level is very different, large to professional enterprises, small to family workshops have, leading to a large gap in product prices. The product price of large enterprises is much higher than that of Shanzhai products, and its living space is much eroded.





and the emergence of millet mobile power, is to let mobile power price war reached climax. As a big brand of millet, the introduction of low to 49 yuan to 69 yuan mobile power products, so that other large manufacturers bear the pressure of a huge price reduction. Reporter in Huaqiang North also see, Millet Mobile power store every several meters have one, become the best-selling products. These shops advertise themselves as genuine millet commodities.





an industry insider told reporters, such as millet such a large factory, the reason for the introduction of such a cheap product, the purpose is to mobile power sales, drive mobile phone sales, its mobile power products should not be for profit for the purpose.





Liu believes that after such a long period of development of mobile power, the end consumers will change their ideas, from the focus on price to quality.