Electric vehicle fast charging about the battery is a certain harm, we in the usual use process, try to let the battery in a relatively mild state, normal receiving current and voltage, stable temperature, so as to extend its service life, reduce unnecessary losses.
When we buy new energy vehicles, the topic we are most concerned about is its driving range, and the driving range is closely related to the battery. Careful friends will find that when purchasing electric vehicles, they will see a fast charging interface and a slow charging interface, that is, in terms of charging time, there is a slow charging time and fast charging time. Many electric cars can be fully charged in less than half an hour.
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First of all, we all understand that the working principle of electric vehicle fast charging and slow charging is not the same, fast charging is important to use DC voltage in charging, in this case, DC voltage is greater than the actual battery voltage, a large number of current ions will also flow from the positive electrode to the negative electrode at a very fast and very efficient speed, so as to complete the process of fast charging. That is, in the case of long-term fast charge, the actual battery voltage is very high, in such a high voltage state, will certainly be affected.
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Secondly, if you choose fast charge for a long time or frequently, the current or voltage requirements for the battery will be very high, the temperature of the battery pack will also increase, and the speed of battery decay will be very fast under long-term high temperature, the battery can be used for 10 years, and the long-term choice of fast charge may only be used for seven years or even shorter time. Attention should also be paid to charging and maintenance.
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To determine whether fast charging has damage to the battery, it essentially depends on what kind of battery type is used by electric vehicles. Usually carried in electric vehicles are lithium-ion batteries and lead-acid batteries, of which lithium-ion batteries also include lithium iron phosphate batteries and ternary lithium-ion batteries. Lithium-ion batteries, which are lighter in weight and have a larger energy density, are currently widely used in most electric vehicles. Lithium-ion battery is through a chemical reaction and the emergence of electrical energy device, when the rapid charging, there will be a large current and voltage input, often use of fast charge will reduce the reduction capacity of the battery, thereby reducing the number of cycles of charge and discharge, causing some harm to the battery.
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Of course, fast charging and slow charging of electric vehicles should be selected according to our daily needs, when the time is relatively tight and the car is in a hurry, you can only choose fast charging, but in the normal life of the car, we still choose slow charging, protect the battery in the range that the battery can withstand, and increase its service life. In the fast charge mode, the battery cell of the ternary lithium-ion battery is more vulnerable to impact, the impact is greater, but in general, the impact on the battery life is limited, but it is best to use ordinary charging as far as possible, do not use fast charging in unnecessary cases, and the stability of the battery is better.