Does fast charging hurt the battery? How to protect the battery health of the new machine? After reading this article, you will understand

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Issue Time: May 22,2023

Summary

With the rapid development of technology, whether it is a mobile phone, a computer or a camera, the configuration, performance, and functions have all made a qualitative leap, but only the battery seems to be less and less durable! As a result, many people began to wonder, is it the fault of the fast charging charger?

In fact, the "health" of lithium batteries is really not directly related to fast charging!

During the energy conversion process of the lithium battery pack, some irreversible substances are produced, which leads to the attenuation of the battery capacity. The conversion rate of these substances is related to temperature, so "reducing the battery temperature" is a big problem-the heat during discharge is much higher than that brought by most fast charges.

The battery is not durable, it is only related to these two points

First, the battery is overcharged and overdischarged

Due to the rapid popularity of fast charging, many friends have developed a habit of waiting until the mobile phone is about to be turned off before charging! And when charging, the power must be charged to 100%! Otherwise, never loosen the charging habit of the data cable. I wonder if you in front of the screen often look like this? And this is exactly the first point we mentioned, the battery is overcharged and overdischarged.

As we all know, most mobile phone batteries on the market are lithium batteries, and the life of ordinary lithium batteries can reach hundreds of cycles, ordinary ones can reach 500 cycles, and better ones can reach more than 1,000 cycles. Long-term overcharging and over-discharging will shorten the cycle life of the battery. If the nominal number of cycles cannot be reached, the battery will not last.

Second, high temperature!

We all know that when using fast charging, the mobile phone will be charged quickly, and the mobile phone will feel hot at this time. The high temperature will affect the activity of lithium ions inside the battery, thus damaging the inside of the battery.

The current solution is to use the temperature sensor to cooperate with the IC to limit, so you can see that many mobile phones will stop charging when the temperature is overheated, or reduce the handshake power when the charging reaches a critical point.

Take the Baseus Xiaoku charger, which has passed the 3C certification and has a built-in intelligent temperature control system, as an example. In order to solve the temperature problem during fast charging, Baseus self-developed BCT temperature control technology, which reduces the temperature by 10% compared with conventional chargers, and low-temperature charging can better protect battery health.

Therefore, when purchasing a charger, you must choose the original or a regular fast charging charger with 3C safety certification.

The rated current and voltage values of uncertified chargers are often higher than those of regular products. Overload, component failure or loose connections are likely to cause fire hazards caused by overheating of mobile phones.

The phone suddenly charges very slowly? Fast charging also needs to be phased

The mobile phone charges very quickly in the first 90% stage, why does the charging time from 90% to 100% become longer? For Virgo and obsessive-compulsive disorder patients, it is impossible to unplug the data cable without charging to 100%!

In fact, the biggest significance of fast charging is that the charging time of mobile phones from 0% to 80%, especially the charging time from 0% to 50%, has a rapid improvement compared with traditional ordinary charging, and not all fast charging.

The four stages of fast charging

Phase 1: Trickle Charge (Precharge Phase)

Detection protocol, temperature, remaining power, wire resistance and other information. Precharge the fully discharged battery unit. When the battery voltage is lower than about 3V, the lithium battery will be charged with a maximum constant current of 0.1C.

Phase 2: Constant Current Charging

The mobile phone is first charged with a small current until the voltage returns to a normal level. This phase acts as a restorative charge!

Phase 3: Constant Voltage Charging

High current constant current charging stage, this stage is the fast charging stage. Our fast charging solutions for mobile phones are all implemented at this stage by increasing the charging current. At this time, the mobile phone is charged with the maximum current allowed for charging. At this stage, the charging current remains basically constant and the voltage keeps rising.

Phase 4: Trickle Charge

At this time, when the battery voltage has reached a certain value, the power of the mobile phone is basically about 90%, and the mobile phone will keep the battery voltage unchanged, and gradually reduce the charging current value.

Do you feel that the charging speed of your mobile phone from 90% to 100% has slowed down? It is because the battery has entered the constant voltage charging stage. In order to protect the safety of the battery, the charging current is gradually reduced until it is fully charged (100%).