Special attention!!! Nine taboos must be paid attention to when charging new energy vehicles
With the rapid rise of the global new energy vehicle market, more and more consumers are choosing to embrace green transportation. However, many car owners are still not very familiar with the safety issues of charging new energy vehicles. The core of new energy vehicles is the battery pack.
Next, let's take a look at the batteries of new energy vehicles. The commonly used new energy vehicles nowadays are lithium iron phosphate and ternary lithium batteries, both of which have different "positive electrodes" but are essentially lithium batteries. The principle of battery charging and discharging is also achieved through the movement of lithium atoms between the positive and negative electrodes.
1. Charging time should not be too long: The charging time should not exceed 12 hours. Generally, the tram can be fully charged within 8-10 hours, including 1-2 hours of float charging. Unless the battery and charger are not compatible, the low voltage of the charger will make the charging time longer. If the voltage is too high and does not turn green, it will cause insufficient charging or overcharging;
2. Cannot charge when the battery is extremely low: When the tram's battery is still one-third, it is necessary to charge the battery. If there is nothing particularly important, it is best not to unplug the power during the charging process, because frequent small charging actions will prematurely exhaust the number of charging and discharging cycles, which will shorten the battery's service life; But there is no need to worry too much. China has made mandatory requirements for the service life of power batteries that the number of charge and discharge cycles must be at least 1000 times. Taking an electric vehicle with a range of 500 kilometers as an example, 1000 charging and discharging cycles means that the vehicle can travel a full 500000 kilometers, while normally, our private cars will only reach a maximum of 200000 to 300000 kilometers of mileage during their lifecycle. Therefore, for normal battery degradation, it can be ignored.
3. Avoid charging in extreme high temperature environments: The power battery of electric vehicles is suitable for working in the range of 0-40 ℃. In extreme high temperature situations, charging the battery at this time can cause the battery to overheat and even self ignite;
4. Try not to charge in rainy weather: Although current charging stations and car charging stations are designed to be waterproof and insulated, the risk of charging is still relatively high during rainy weather. Therefore, it is best not to charge outdoors during rainy weather;
5. Charging time should not be too long or too short: frequent short charging can accelerate the service life of the battery, while too long charging time may cause the battery to self ignite. Therefore, after charging, remember to unplug the charging gun;
6. Do not directly unplug the charging gun during the charging process: Whether charging at home or outside, the charging should be completed through the vehicle's central control screen or charging station, and then the charging gun should be unplugged. Directly pulling the charging gun may cause damage to the vehicle's charging system;
7. Do not use flying or grounding wires for charging: Due to various reasons, some tram owners may use flying or grounding wires for charging, which poses a safety hazard and may cause short circuits and spontaneous combustion; There are risks to one's own and others' health and property safety.
8. Try not to use grounding devices: Grounding devices are mainly used to solve the problem of not having a grounding wire, which can also pose safety hazards during the charging process. There is a possibility of short circuit in the circuit, and charging through a power source without a grounding wire may cause electric shock due to current passing through the vehicle body;
9. Do not leave people in the car during charging: During charging, the battery is in a high current and high voltage working state. Even if the vehicle has extremely high charging safety, there are still safety hazards. Do not stay in the car or near the vehicle as much as possible.
The above are the nine things to pay attention to when charging electric vehicles. Although there are many things to pay attention to when charging electric vehicles, as long as the charging is standardized and reasonable, there will not be too many problems. After all, when car manufacturers develop cars, they also invest a lot of energy in safety performance, and batteries are also the most important thing for manufacturers to pay attention to. For most car owners, the most important thing to pay attention to is not overcharging or discharging.
