How much worse is the battery of an electric vehicle in the north than in summer at minus 20 degrees

Lithium batteries have an impact on the range in the cold winter.

Lithium-ion batteries work on the principle that the electrolyte inside changes through a chemical reaction, and a potential difference occurs at the positive and negative electrodes to produce an electric current. In a low-temperature environment, the electrolyte moves quite slowly, which affects the transfer activity of lithium ions between the positive and negative electrodes, resulting in a decrease in the charging and discharging performance of the battery.

To put it simply, in a low-temperature environment, it is not that the lithium battery is really dead, but that there is power but cannot be released normally. According to analysis data, the capacity of ordinary lithium batteries will be reduced by 20 at zero degrees Celsius, and when it reaches minus 10 degrees Celsius, the capacity may only be about half.

Extended Information: Precautions for Winter Use:

1. Find a warm place to charge.

When the ambient temperature is lower than 0, charge the electric vehicle, the system will automatically heat the battery cell first, and when the temperature of the battery cell reaches more than 5, it will really start charging the vehicle. Some EV owners feel that charging their EV in the winter suddenly slows down, which is actually an extra time to heat up the battery cells before charging the vehicle.

Therefore, when the car owner usually charges the car, he should try to choose the underground parking lot, closed garage and other places. This helps to improve the activity of the battery, which not only reduces the loss of range, but also improves the efficiency of charging and saves time.

2. Charge the battery for a short time before traveling.

The day before, the electric car was still 60 or 70 percent charged, but the next morning it was only 30 percent or less charged. Some people call this situation "running electricity". In fact, this kind of "running power" is not a failure, but a fault caused by low temperature.

In the process of driving the electric vehicle, the battery is in a state of continuous discharge, the temperature will be relatively high, and the voltage of the battery is relatively high.

However, after being parked in a low temperature state for a whole night, the battery has cooled down and the voltage drops, at which point the car's system will automatically adjust the displayed power and range, which creates an illusion of "running power". In this case, you generally only need to go out in advance and charge the battery for about 10 minutes.

3. Drive steadily and don't be in a hurry.

When driving an electric vehicle, you should accelerate slowly and avoid intense driving methods such as deceleration, sharp turns, and sudden braking. Good driving habits can effectively reduce the rate at which the battery drains power. The time to start the car should not exceed 5 seconds each time, and the interval between starting again should not be less than 15 seconds.

If the battery mileage drops too much, you should go to the 4S store in time to check the battery of the car, replenish the electrolyte of the battery in time, and adjust the specific gravity of the electrolyte.

Hope, thank you!

According to what you mentioned, the difference is more than half the amount of power. If the battery is stored at minus 20 degrees for a long time, the chemical reaction will be very slow, so the power drop is very large.

In winter and summer, the difference in battery availability is mainly due to the difference in temperature. At present, electric vehicles use lead-acid batteries, the best working environment temperature of this battery is 15 — 40, below this temperature, the battery storage power will be reduced, the lower the temperature, the more obvious the drop in power, due to the low temperature in winter, so the driving distance of the electric vehicle will also be reduced, and the phenomenon will be restored when the temperature rises, therefore, in order to ensure the normal use of electric vehicles, the easiest way is for users to charge in time.

Precautions for using electric vehicle batteries in winter.

1. Avoid instantaneous high-current discharge.

When the electric vehicle starts or goes uphill in winter, it should be assisted by humans to avoid instantaneous high-current discharge. In addition, when the electric vehicle is idle, the battery should be stored sufficiently to prevent power loss, the longer the power loss, the more serious the battery damage, the electric vehicle after use, the battery should be charged frequently, do not charge the battery after it is completely used up.

2. Battery storage.

If the vehicle is parked in the open air or cold storage for several weeks when not in use, the battery should be removed and stored in a warmer room to prevent the battery from being damaged by freezing, and it should not be stored in a state of power loss. If not in use for a long time, charge it once a month.

3. Clean the battery.

It is also important to clean the battery's binding posts and protect them with special grease to ensure reliable start-up and extend battery life.

The capacity is different. Yes, the capacity of lead-acid batteries is related to temperature, which is a matter of principle of lead-acid batteries. The nominal capacity of the lead-acid battery is determined by the capacity when the ambient temperature is 25, and the battery capacity will change with the change of ambient temperature, the higher the ambient temperature, the higher the capacity, the lower the ambient temperature, and the lower the capacity.

Generally, the battery capacity can be estimated at different ambient temperatures using the following formula:

ct =c25 / （1-k*（t-25））。

C25: refers to the capacity of 25 ah.

CT: Capacity AH under the actual ambient temperature test.

k: conversion factor, generally taken.

Common 18650 batteries:It is divided into lithium-ion batteries and lithium iron phosphate batteries. The voltage of lithium-ion battery is nominal voltage, the charging cut-off voltage is, the nominal voltage of lithium iron phosphate battery is, the charging cut-off voltage is, the capacity is usually 1200mah-3350mah, and the common capacity is 2200mah-2600mah.

It was winter, the weather was cold, the snow in the north was heavy, and the south was foggy, and under such temperature conditions, the electric car seemed to be about to hibernate, and the charging time was longer than before.

When the battery is charged and discharged, the chemicals in the electrodes and electrolyte will undergo a chemical reaction, and electrons will start from the electrode and pass through the electrolyte to another electrode. Therefore, when discharging, the chemicals on the electrode are consumed to discharge externally; When charging, the chemicals that were previously consumed are reduced to the electrodes by dissipating external electrical energy. Since electric vehicles will be used in different regions and under different climatic conditions, the reaction condition of temperature will affect the efficiency of the chemical reaction inside the power battery, and the chemical reaction inside the battery will become slow or even stop when the temperature is too low.

Charge frequently, do not wait for the electricity to run out before charging, it will hurt the temperature drop of the battery, which will have a direct impact on the capacity of the electric vehicle battery. In summer, it may be enough to charge once in three days, but now it may not be able to meet the use, so you need to charge it once a day. Do not wait for the electric vehicle to run out of power at all before charging, this will not only affect the normal use, but also cause damage to the battery.

The electric vehicle is not in use, and it should be charged once a month to avoid vulcanization of the battery. Before placing the electric car, the electric car should be fully charged, so that the electric car can be placed in the case of electricity, and the electric vehicle will be charged once a month, so as to avoid battery damage caused by vulcanization. Of course, sometimes the mileage of electric vehicles drops too obviously, and it is not necessarily a problem of temperature, if the drop is too obvious has affected the normal use, you can go to a regular electric car shop or repair shop to test, your battery is likely to need to be replaced.

Do not mix multiple chargers. There are many different models of electric vehicles, electric vehicles with different configurations, different battery models, and chargers are naturally different. In addition, indiscriminate use of different charger models may result in battery leakage, heat, smoke, fire, or**.

When the battery is deformed or swollen, the battery charging should be stopped immediately.

Don't use fast charging frequently, and use it fully every time you charge it.

According to the time of starting and ending charging, you can calculate how long it will take for your electric vehicle to be fully charged, and then you can select the ** when charging according to the time of charging, so that you can charge it most effectively.

The president revealed: With the same battery, why does the electric car not run as far in winter as in summer?

As temperatures drop day by day, many people find that their two- or three-wheeled wheels have much less power and their batteries are not as durable as they used to be. In the summer, you can run 70 kilometers on a full charge, and now in this cold season, you can run a kilometer on a full charge, and you are worried that the electric car will break down at any time on the way to and from work. Many users suspect that there is a problem with the quality of the battery and want to replace it with a new one, but it is not.

Winter is coming, and the durability of the battery decreases, which will give people the illusion that the battery is destroyed!

Generally, the best charging environment temperature for electric vehicle batteries is 25, and residents with heating at home are best to charge electric vehicles or electric vehicle batteries indoors to enhance the battery's power storage capacity and extend the driving distance. In order to reduce the power consumption in winter, under the premise of ensuring safety, braking and restarting should be minimized.

The input voltage of the normal charging of the electric vehicle battery is 50 volts, and it generally takes 8-10 hours to complete the charging, while the input voltage of fast charging can reach 400 volts, and the battery can be fully charged in half an hour. Use a fast charger once in a while but have no problem, and according to experts, occasional fast charging is also good for the battery, activating the activity of the electric car. However, if it is charged quickly, it will damage the battery and shorten the life of the battery.

Most of the batteries of electric vehicles are lead-acid batteries. One of the disadvantages of lead-acid batteries is that they are not tolerant to low temperatures. When the use environment is lower than 5 degrees, the battery capacity will gradually decrease.

Because the viscosity of the electrolyte increases at low temperatures, the ion movement is hindered, and the diffusivity decreases. In addition, the resistance to chemical reaction also increases, and the low temperature will also lead to a low utilization rate of the anode active material. For various reasons, the battery capacity will drop a lot in winter, or even more than half.

This is a normal phenomenon, and the ambient temperature is fine. Just be patient!

Because the temperature is very low in winter, more electricity is required for both starting and normal driving. In winter, the ions in the battery are less active, so the electricity is consumed much faster than in summer.

Because the temperature is very cold in winter, and the battery can not be charged to a full capacity every time it is charged, it consumes a lot in the process of driving, and the performance of the battery in summer is quite perfect, so it can be fully charged.

The main reason is that the cold air in winter causes the power to be lost by itself, and the temperature difference between summer and winter is relatively large, so the gap becomes very large.

Why does the battery of an electric car drain very quickly in winter? See here for the truth.

In winter, the temperature is low, the activity of the battery itself is not enough, and in the low temperature environment, the self-heating of the battery will also consume a certain amount of power, so the range of electric vehicles in winter will be reduced by about 10-15% compared with summer without the use of air conditioning.

If the heater is turned on, the impact will be greater, and the cruising range will even be reduced by 30%. Therefore, try not to use the air conditioner for a long time when driving in winter, and if the car has seat heating, try to use the seat heating function, which is more efficient than the air conditioner. If there is no such function, then turn on the air conditioner every once in a while.

Precautions for electric vehicle batteries.

As we all know, the quality of the battery will directly affect the performance of electric vehicles. Therefore, before installing the battery for the electric vehicle, the owner should check the battery frequently for damage or leakage, and clean the battery surface regularly with a dry cloth. If the battery shell is found to be deformed or leaking, the battery should be replaced at the after-sales point in time to avoid acid corrosion.

Lead-acid batteries should be installed upright, not upside down, the spacing between adjacent batteries should be greater than 2 mm, and the installation should be as stable as possible to prevent vibration and squeezing during bumps, resulting in damage to the internal components of the battery.

The old car controller motor will consume more power than the new car, coupled with tire wear, shock absorption aging, the pressure on the car becomes greater and so on, the new battery runs more than 50 kilometers is almost normal, and the capacity of the battery in winter will be less durable than in summer.

It's hard to say, it has something to do with the aging degree of the battery and the temperature, it will generally be about one-third less, and some areas will drop by more than half, anyway, as long as it's cold, it's good to charge more and run less.

No one counts this data, different environments and different regions, different cars and different batteries are different.

Depending on the temperature difference between the environment in summer and winter, if the temperature in the northern winter is below 0, the cruising range can be reduced by 40 to 60%. The best solution is to increase the number of charges, and the low temperature can not be discharged in charging, which will damage the battery.

The battery is converted from chemical energy to electrical energy, and the activity of the chemical reaction is related to the temperature, and the temperature range of about 25 is the most active and the efficiency is the highest.

Well, it's normal to have an error in the mileage between the winter and the summer.

The battery of electric vehicles generally uses lead-aluminum batteries, and the batteries are not durable when the chemicals are not active in winter.