First, face. After you have determined a brand or a car model, the first thing is, of course, the appearance. The technology and level of paint baking directly affect the first impression of this car.
The materials for baking paint include primer, finish and varnish. Different brands of paint directly affect the final effect. Of course, when selecting a car, we can't know the specific paint brand of the car, but we can judge the quality of the paint according to the paint baking effect.
Good baking paint has bright surface and deep and natural color. There should be no uneven color, color difference or large area of pits or bumps. The applique process is flat, and the paint is evenly covered. Under the sun, the paint color is bright and colorful, and the shade has a rich texture. If you find it difficult to understand these descriptions, the easiest way is to go to more stores and compare more cars of the same color. I feel it will come out soon.
The most important thing is to consider the UV resistance of the baking paint. Many car baking paints do not add UV resistant agents. The car will fade gradually after long-term exposure to the sun, especially the white baking paint, which is more prone to fade or discoloration. Because such problems cannot be judged immediately, we can observe whether the exhibition cars of the car shop have fading problems and make a basic assessment.
The second is the lining. The structure of the whole vehicle is very simple. The basic units are the frame, plastic parts, shock absorption, battery, controller and motor. The quality of the frame is particularly critical. Many users do not care about the quality of the frame because it is difficult to observe it. However, the quality of the frame directly determines the safety performance of the whole vehicle. Here are some ways to verify the frame. First, observe the welding level of the frame inside the plastic parts of the vehicle. If there is false welding or desoldering, it indicates that the quality of the frame is not ideal.
Secondly, observe whether the frame has signs of rust, because the frame needs a process called electrophoresis to prevent rust. Many frame manufacturers simply spray black paint without electrophoresis in order to control costs. If the new car is rusty, it indicates that the frame electrophoresis quality is abnormal. Finally, test drive the car, drive at high speed and then brake suddenly to see if the frame shakes from left to right. If the shaking is severe, it indicates that the quality of the frame is not up to standard and there is a potential safety hazard. Because the electric vehicle market is mixed, and the frame is hidden inside the vehicle and cannot be directly inspected, many manufacturers do not strictly control the quality of the frame. It is very important to select a good frame for the whole vehicle. There is also a simple method. If the battery is removed from the vehicle, you can lift the vehicle to try its weight. The heavier the vehicle is, the more solid the material is, and the greater the possibility of better safety performance.
Shock absorption is a key component affecting comfort, which is divided into front shock absorption and rear shock absorption. There are many methods to test the front shock absorption. Here we introduce a common method: ride an electric vehicle, accelerate quickly to the maximum, and then suddenly brake. The front shock absorption will be immediately compressed because of the inertia of the vehicle itself. At this time, hold the brake handle with both hands and press down with the shock absorption force to feel whether the shock absorption is in the end. If the shock absorption is in the end, it indicates that the shock absorption effect is poor, and the quality of the front shock absorption is not up to standard. The test method of rear shock absorption can be used to feel the comfort level by riding over some speed bumps or ditches, or by pressing the seat cushion quickly in situ.
In addition to the downward shock absorption function during compression, a good shock absorption should also have the shock absorption function during shock absorption and rebound, rather than a hard and fast rebound. The shock absorption performance directly affects the comfort level of the vehicle. If you feel that it is not obvious, you can ride several different brands of cars to find out how you feel.
The choice of battery is also very important. A good battery can greatly reduce the later use and maintenance costs of consumers. Batteries are divided into lead-acid batteries and lithium ion batteries. The prices of batteries of different brands vary greatly. For lithium batteries, the differences between different categories are even greater. The prices of batteries of category II differ greatly from those of batteries of category I. It is difficult for ordinary people to distinguish between good batteries and bad batteries, and the price of batteries accounts for a huge proportion. Therefore, selecting batteries through brands can effectively prevent bad batteries from fishing in troubled waters. Tianneng and Chaowei are both listed companies in the battery industry and reliable battery brands.
In order to avoid buying fake goods, consumers can also choose not to buy batteries in the car shop, but to choose a battery franchise agency, which can ensure the quality of batteries. When it comes to batteries, the quality of chargers is also crucial. Many electric vehicle fire accidents are caused by short circuit of chargers. The charger not only directly affects the safety, but also has a direct impact on the battery life.
Many batteries have a life of only one year, not because of the quality of the battery itself, but because consumers choose unqualified chargers. Long term overcharge or undercharge will shorten the battery life. Therefore, choosing a qualified charger is the key to ensure the battery life. It is recommended that consumers choose a high-quality charger, which can ensure both safety and battery life. Even if they spend 20 yuan more on the charger, it is much cheaper to choose a high-end charger than to charge a bad battery.