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Taboos for charging lithium-ion batteries for electric vehicles. Do lithium-ion batteries need to be charged every day for electric vehicles? As electric vehicle lithium battery packs become increasingly common in the market, many people do not understand the correct charging method for electric vehicle lithium batteries. Nowadays, lithium battery packs are the preferred choice for electric vehicles. Lithium battery packs are lighter, while lead-acid batteries are bulky and perform better in terms of performance. Lithium batteries can be charged and discharged normally from -20 ℃ to 55 ℃, and their lifespan is 3 to 4 times that of lead-acid batteries for electric vehicles.

Taboos for charging lithium batteries in electric vehicles

First temperature: Lithium batteries are afraid of high temperatures.

The second largest current: If the battery cell is lower than the discharge current of the electric vehicle, it will cause the temperature of the lithium battery to be too high, the current will be too large and the lifespan will be shortened, and there will also be situations of bulges and scrapping. If the electric vehicle has a very high power and a very fast speed, it is recommended to choose a 18650 battery cell with a 10C current, which is obviously very important to choose an appropriate battery cell.

The third is full charge storage: a ternary lithium battery can be fully charged at 4.35V, and currently, the protection boards on the market cut off charging at 4.2V. Therefore, many people buy electric vehicle lithium batteries and claim that they do not have the nominal capacity. In fact, this is the reason. Generally, when storing electric vehicle lithium batteries for a long time, it is best to fully charge 50% of the TV.

The fourth point is that when charging the battery, if the charger plug is constantly heating and the heating time is relatively long, it is necessary to immediately check whether the plug is short circuited or has poor contact. The charger should be unplugged, checked for oxides such as rust on the plug, and then immediately removed.

Do lithium-ion battery electric vehicles need to be charged every day?

There is voltage inside the lithium battery. If the electric vehicle lithium battery is charged for a long time, the voltage inside the battery will increase, and the battery will also bulge. If the battery swells up, it is very dangerous. After the battery is inflated, its endurance will be greatly reduced, and the lifespan of lithium batteries will also be affected. In addition, it is also prone to explosions. If the battery is charged every day, it not only harms the battery but also easily causes safety issues.

Under normal circumstances, the lithium battery should be fully charged before charging, but specific measures should be taken according to actual living needs. For example, if the remaining battery of the electric vehicle tonight is insufficient to support tomorrow's journey, and the next day it does not have the conditions for charging, it should be charged in a timely manner.

In fact, the principle of using up the remaining battery and recharging does not refer to the extreme practice of using the battery completely. If an electric vehicle still does not charge until it cannot be driven after the warning of low battery level appears, this situation may result in the voltage being too low due to excessive discharge of the electric vehicle's lithium battery, causing damage to the battery life.

Nowadays, electric vehicle lithium battery chargers are all three-stage charging, divided into constant voltage stage, constant current stage, and trickle stage. The first two stages are the main stages of charging. After the battery is fully charged, the light will turn green and enter the trickle stage. To protect the battery, do not unplug the power and continue charging for 1-2 hours, which can effectively increase the battery life. However, do not exceed 8 hours after turning green.

For general electric vehicle lithium battery charging, it is best to charge according to the specifications stated on the specification sheet. If not, it depends on the capacity of the lithium battery and the current of the charger. For example, for a 48V/20A lithium battery with a 5A charger, it takes more than 4 hours to charge, for a 10A charger, it takes more than 2 hours, and for a 20A charger, it takes one hour to charge.

The above are the charging methods and precautions for lithium-ion battery packs for electric vehicles. It is predicted that lithium-ion battery packs for electric vehicles will become popular in the next 3 to 5 years. However, the high price of electric self lithium-ion batteries still makes consumers hesitant. I believe that in a few years, with the maturity of lithium battery production technology, it will enter people's homes at a reasonable price.

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