Practical Skills Sharing of New Energy Vehicles in Cold Weather

Practical Skills Sharing of New Energy Vehicles in Cold Weather

The cold in late winter and early spring not only makes people more likely to catch a cold, but also makes them "sick" by car. Especially in the cold days of spring, new energy owners will obviously feel that the car power is not used and the battery life is greatly reduced. In fact, if you master a few keys, your car can run smoothly in cold weather!

Both fuel vehicles and new energy vehicles will be affected in cold weather, but for different reasons. New energy vehicles are afraid of cold because of its energy supply mode:

Why are new energy vehicles "afraid of cold"

1, the resistance of low temperature battery increases and the capacitance decreases.

According to the test results of new energy vehicles in winter, the average ultimate endurance of new energy vehicles is 30% at 0℃, and it can only reach about 50% at-15℃.

This situation is mainly due to the fact that most electric vehicles on the market now use lithium-ion batteries, and the optimal temperature of lithium-ion batteries is 25℃. In low temperature environment, the battery activity is weakened, the cycling ability is weakened, the electrolyte viscosity is increased, and the charging and discharging efficiency is reduced. Therefore, the endurance of new energy vehicles will be significantly reduced in low temperature weather.

2.PTC/ heat pump air conditioning will increase energy consumption in cold weather.

As we all know, fuel vehicles mainly rely on the high-temperature heat generated by the engine without additional energy loss. The air conditioning heating methods of new energy vehicles can be divided into two categories, one is PTC thermistor heating, and the other is heat pump air conditioning heating.

Thermistor has the advantages of simple structure, small volume and fast heating speed, but the disadvantage is power consumption. Suppose its power is 3000W, and it takes 3kWh of electricity to turn on hot air at full power for an hour, which is a great burden for pure electric vehicles.

The advantages of heat pump air conditioning are less power consumption and higher thermal efficiency than the former. In winter, compared with traditional thermistor heating, heat pump air conditioning can reduce energy consumption by 60% and increase cruising range by about 25%. However, the disadvantage is that with the decrease of temperature, the heating efficiency will be greatly reduced, and the system performance will deteriorate due to frosting at a low temperature of about 0. 5.

In the final analysis, both thermistor and heat pump air conditioner will consume a lot of power supply in low temperature weather, which will significantly affect the cruising range of electric vehicles.

Matters needing attention in using new energy vehicles in winter and early spring

1, take some skills to protect the battery.

First, when parking for a long time in cold weather, try to park the vehicle indoors. If you must park in the open air, you can take some measures to keep your car warm and freeze-proof, such as covering the car body with a warm and freeze-proof tarpaulin, which not only protects the battery, but also facilitates the cleaning of rain and snow.

Second, when charging in rainy and snowy days, try to choose the indoor parking lot as a relatively warm environment, which is conducive to improving the charging efficiency. Because the new energy vehicle is designed to be rain-proof and frost-proof, it is necessary to check whether the charging equipment and charging port are left with water-stained ice slag before charging, and keep the charging port and charging gun in a dry state to prevent potential safety hazards.

Third, new energy vehicles, like fuel vehicles, need hot vehicles in cold weather. The difference is that the hot car of the new energy vehicle cannot idle in place. When you warm up the car, you should drive at a low speed for one or two kilometers, so that the cooling liquid in the power battery pack will gradually heat up, help the battery work, and let the engine enter a normal state, thus achieving the purpose of warm up the car.

2. Reasonably plan the use of air conditioners.

First of all, the air conditioner does not need to be turned on too high, just keep warm enough, which can give consideration to the comfort of the car body and the energy saving of the air conditioner, reduce the temperature difference between the inside and outside of the car, be beneficial to the internal and external circulation of the heat pump, and also prevent colds caused by cold and heat.

Secondly, in the case of short-distance travel in the city, even if the air conditioner consumes a lot of electricity in low temperature weather, as long as it is fully charged, there is no need to worry too much about battery life; In the case of long-distance travel, the owner can make a plan to replenish energy in advance to ensure that the car has sufficient power at any time. In short, while considering battery life, don't freeze yourself to save electricity.

The cold winter is not over yet, the spring breeze and the cold wind are cold, and the influence of low temperature will continue for some time. New energy vehicles are afraid of cold, so they should take good care of them. Do a good job in cold protection and warmth, reduce endurance anxiety, and ensure that they can travel with peace of mind no matter how cold the weather is.