Battery charger fast charging principle -Lithium - Ion Battery Equipment

Principle of fast charging of battery charger, how battery fast charging technology is achieved -Lithium - Ion Battery Equipment

The principle of fast charging of lithium-ion battery charger, how is the battery fast charging technology achieved? In today's era, people are increasingly pursuing efficiency and speed. This concept of efficiency is multi-faceted. Now that there are more and more lithium-ion battery products, many people are also concerned about the charging speed of lithium-ion batteries. In order to meet this demand of people, many lithium battery companies have invested money and energy in fast charging of lithium batteries.

The fast charging method is indeed very attractive, and the operation in the laboratory also shows high feasibility. As the demand for power of mobile phones has greatly increased, low-rate charging standards have been difficult to meet the charging demand. At this time, lithium-ion battery technology also made great progress, with better stability, improved charge and discharge tolerance, and fast charging began to take the stage.(Lithium - Ion Battery Equipment)

Lithium-ion battery charger fast charging principle

Generally speaking, fast charging uses DC charging. A simple understanding of fast charging mode is to use a large current to quickly charge the battery in less than 1 hour. Secondly, regarding the inside of the battery, lithium ions must be accelerated and instantly embedded into the battery during fast charging. negative electrode. First, use a wider charging pulse to charge. The terminal voltage of the battery rises. When the charging time setting time is reached, the charger suspends charging. When the charging interval reaches another point, the charger continues charging.

The fast charging method consists of two parts: the charger part and the power management part. The chip of the power management part is placed in the mobile smart terminal, and some are directly integrated into the mobile phone case. The power management chip performs the entire charging process of the lithium-ion battery. Management and monitoring, including complex processing algorithms,

Lithium-ion battery charging includes several stages: precharge stage, constant current charging stage, constant voltage charging stage, and trickle charging stage. The charging management chip issues instructions to the charger based on the electrical characteristics of each stage of the lithium-ion battery charging process. Notify the charger to change the charging voltage and current, and the charger receives the demand from the charging management system, adjusts the output parameters of the charger in real time, and cooperates with the charging management system to achieve fast charging.

Fast charging refers to a charging method with a charging current greater than 0.1C. This charging method has very little impact on the life and stability of a single lithium-ion battery; but for a battery car battery pack, fast charging means trading time. An act of battery life.

How does battery fast charging technology work?

First, use a wider charging pulse to charge the battery to increase the terminal voltage of the lithium-ion battery. When the charging time limit set by the charging system is reached, the charging system cuts off the power supply current to suspend charging of the battery. Then, when the interval reaches another charging point Then restart charging and repeat this process. When all the lithium ions inside the battery gather on the positive and negative electrodes of the battery, the car battery will be fully charged quickly.

To achieve this kind of fast charging, a matching charging system must be provided. However, given that the current battery pack balancing technology, power transmission and distribution technology, especially heat dissipation technology, do not meet the requirements, true fast charging cannot Fully realized, the charging time has been greatly shortened compared to ordinary charging technology. The most important thing is this fast charging technology. In principle, fast charging will not seriously consume the battery and sacrifice the service life of the battery as rumored.

In general, in order to achieve fast charging, in addition to having a dedicated battery system to ensure the conditions for rapid movement of internal electrons and automatic charging management, a special external charging system must be supplied to supply the battery system with the required energy. The large current shows that the principle of battery fast charging is not that complicated.

During fast charging, lithium ions must be accelerated and instantly embedded into the negative electrode, which poses a great challenge to the negative electrode's ability to quickly receive lithium ions. When batteries with ordinary chemical systems are fast charged, by-products will appear in the negative electrode, affecting the cycle and stability of the battery cell. 



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