TU-TESL

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The annual 315 is coming again. This time point is more like a life test for large and small enterprises. Everyone is afraid that their products will be used as negative textbooks to make CCTV headlines. The same is true for two wheel electric vehicle enterprises. Every 315 party, each major electric vehicle enterprise will stare at the screen to see if there is a blacklist of its own products. Today, the author will help you check the hidden dangers of electric vehicles mentioned in 315 over the years. At the 315 party in 2018, CCTV issued the No.4 consumption warning for the safety of electric vehicles. In the broadcast experimental video, when the electric vehicle battery is overcharged, the fire and explosion will ignite other parts of the vehicle body, and a large number of toxic smell will be released, which is shocking, but also causes industry vigilance and social hot debate. According to the statistics of the fire department, in recent years, 80% of the fire accidents caused by the electric bicycle in China are caused by the overcharge of the battery of the electric bicycle. The reason why electric vehicles are so concerned is not only closely related to life, but also a big stimulus factor is the large number of user groups. It is understood that China has 250 million to 300 million electric vehicles, and in this huge number, the annual increase is still 10% - 20%. According to the data released by CCTV News survey, nearly 90% of the electric vehicle chargers on the market are unqualified, while most of the users' electric vehicles are placed in public walkways, staircases or houses for charging, and most of the batteries are lead-acid batteries, with the disadvantages of short endurance, inconvenient charging, potential safety hazards, long slow charging time, etc. If the battery is overcharged, there will be "water shortage" in the battery, and some flammable and explosive hydrogen will also be produced, which will cause the expansion of the battery drum, and the battery will also be heated during the charging process. When the battery is full, the charger does not have the function of automatic power off or anti overcharge setting, so a large amount of heat and hydrogen will easily cause fire and explosion, leading to safety accidents. Therefore, users with electric vehicles at home must pay attention to: ① don't try to buy modified batteries cheaply, because these batteries are reassembled with cells that have exceeded their service life; ② try not to charge at night, because charging at night is very easy to overload and cause fire; ③ charge according to the time specified in the manual, and the voltage of the charger and battery should match; ④ try not to The battery is charged at home. In addition to the safety hazards triggered by the use of electric vehicles, why can't we choose electric vehicles as much as possible to prevent them? To identify the brand in the selection of electric vehicles, we must consider the brand, not to say the products of big brand, it must be the best, but the product quality must be the most guaranteed, after all, big brand in product design, production, sales, as well as after-sales, have a perfect process, once there are product quality problems, they can be dealt with in a timely manner. You may say that there are so many brands of electric vehicles on the market. What brand should you choose? In fact, it's not hard to choose, because there are only a few head brands. If you like traditional electric vehicles, you can choose Yadi, Emma, tailing and Xiaodao. If you like smart electric vehicles with a sense of technology and a sense of trend, you can choose from the brands of Mavericks, No.9 and Suke. After you see the brands, it's mainly about what kind of models you like. 02 when a lot of people buy electric cars, the frame is the most easy to ignore. Someone may say, what's the use of looking at the frame? Power doesn't depend on it. No matter how good the frame is, it can't increase the endurance! In fact, you can think about it from another angle. If a person does not have a skeleton, he will become a lump of soft meat. So does an electric car. Without a frame, he will become a pile of parts, which is of no value. In addition, the rigidity of the frame and the solid level of materials will not only affect the riding comfort, but also involve safety issues. Therefore, when purchasing electric vehicles, we must first look at the frame. It's better to have a test drive experience and fully feel the comfort and support of the frame. 03 brake configuration is very important for both motor vehicles and non motor vehicles, because it determines our driving safety. With it, we can say that our safety will be relatively guaranteed. When looking at the brake configuration of electric vehicles, you should first look at the parameters, then look at the type of brake, and finally test drive to experience the emergency brake. At present, the electric vehicles on the market generally use disc brake or drum brake, but although the brake force of drum brake is stronger, the gap between the brake shoe and the brake drum of drum brake is larger and the reaction is relatively slow due to the difference between the structure and disc brake. The gap between the disc brake disc and the brake pad is very small, the brake response is faster, and the brake is more sensitive than the drum brake. Therefore, when choosing electric vehicles, we should try our best to choose enough electric vehicles with disc brake system. Of course, the most important thing for battery selection is at the end. When purchasing electric vehicles, we should pay more attention to battery selection. The familiar battery type is lead acid, and lithium battery. For graphene battery, you may have heard about it, but there are few applications. Comparatively speaking, it is basically in the development stage. For the selection of these types of batteries, the author's suggestion is to choose lithium batteries. One of the reasons is that lithium batteries can be disassembled, small in size, relatively fast in charging speed, and easy to carry, while lead-acid batteries are slightly large in size, heavy in weight, and cannot be disassembled. The second reason is that compared with lead-acid battery, the pollution to the environment is less, although the price is higher, the battery is relatively stable. 05 in the final purchase of electric cars, we must not pay too much attention to the price, but ignore the quality. Cheap cars are all made on top of the cars to reduce the cost, reduce the cost if you can, and save if you can. In fact, these are related to our safety problems, especially in the battery, as consumers, we can't be greedy for the price and put our own safety out of the business. The electric car accident happened in life is really shocking, so I should pay more attention to it. After all, there is no small matter about safety, and I hope you can pay more attention to it, and don't regret the accident.