Battery fast charging technology problem -Lithium - Ion Battery Equipment

What are the risks of battery fast charging? -Lithium - Ion Battery Equipment

What are the risks of lithium -ion battery fast charge technical problems? In the absence of inventes, the fast charging has become a temporary solution. Generally, fast charging is a high -power DC charging. It can be filled with 80%capacity in half an hour. The voltage of fast charging DC charging is generally greater than the battery voltage. So what are the risks of lithium -ion battery fast charging about the technical issue of lithium ion battery fast charge? I will give you doubts!

What are the risks of lithium -ion battery fast charge technical problems?

The three basic methods of the fast and realization of the mobile phone are: the voltage is unchanged, the current increases the current; the current is unchanged, and the voltage is increased; the voltage and current are improved. However, if you want to truly realize the fast charging, you can not only improve the current and battery. Fast charging technology is a complete set of systems, including fast and suitable accessories and smart power management systems.(Lithium - Ion Battery Equipment)

Long -term fast charging affects lithium -ion battery life. The rapid charging of lithium -ion batteries is at the expense of the cycle life of the battery. Because the battery is an electrical energy device that occurs through the electrochemical reaction. Instantly enter a large current into the battery. Frequent use of the fast charging mode will reduce the battery restore ability and reduce the number of cycles of battery charging discharge.

What are the risks of lithium ion battery fast charging

The fast charging of lithium -ion batteries brings three effects: thermal effect, analysis of lithium and mechanical effects

1. Frequent fast charging accelerate the polarization of the battery cell

When the continuous charging current is large, the ion concentration at the electrode increases, the polarization is intensified, and the battery side voltage cannot correspond to the charging power/energy direct linear ratio. At the same time, large current charging, increasing internal resistance will cause the coke ear heating effect to exacerbate the side reaction, such as a series of problems such as the reaction decomposition and gas production of the electrolyte. The life of the battery will inevitably shorten.

2. Frequent fast charging may cause electrical crystals

Lithium -ions may form lithium crystal lithium on the surface. The lithium of the Zhi crystal will pierce the diaphragm and cause the secondary loss of Li, reducing the battery capacity. When the lithium crystal reaches a certain amount, it will grow from the negative electrode to the diaphragm, causing the risk of short circuit of the battery.

3. Frequent fast charging will shorten the battery life

Frequent charging is also easy to accelerate the life of the battery, and even cause problems such as reduction of battery activity and shortening battery life. Especially after the addition of fast charging technology, although the speed of charging in the early stage is very fast, it is unplugged without rushing to 100%, resulting in multiple charging. The number of batteries is added. The activity of the battery accelerates the aging of the battery.

High temperature is the largest killer of lithium -ion battery aging. The high power of fast charging will heat up the battery in a short time. Although the power is low and the unit time is low during the unit time, it must be more power -on time. In this way, the battery calories will also accumulate over time, and the difference in heat during the charging process is not enough to cause differences in the aging speed of battery.

Based on the above content, we can summarize the high quality requirements of fast charging about batteries. There are large losses on the life of the battery, and the safety factor will decrease significantly. Therefore, as much as possible when not necessary. Frequently charging batteries will cause damage to the battery. However, due to the differences in battery cell density, material, environmental temperature, and battery management system, the degree of damage of the battery during the fast charging process is also different.

At present, most batteries will design reasonable charging strategies based on factors such as the remaining battery, battery performance and other factors. By adjusting the charging power, try to reduce the damage to the battery as much as possible. Therefore, the user occasionally uses fast charging, so you don't have to worry too much about damaging the battery!



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