People usually have a misconception when charging: it is better to insist on a full charge. Perhaps on the OCD when the battery power jumped from 100 percent to 99 percent will kill him, but in fact, always let the phone adhere to the charging condition is not the recommended practice of energy storage battery manufacturers, especially after the device is fully charged and continue to charge, the phone battery can not really suffer so tossed.
Lithium batteries are not all-powerful
There are many older generation in your access to a cell phone will always tell you that the new phone to complete the full discharge, then charge full 12 hours, and then completely discharged, need to repeat so 3 times. Initially silly you set in accordance with the words of the old generation honestly do, but in fact now with the lithium battery smart phones have long ceased to need such a laborious battery maintenance process.
The need for repeated discharge charging process is the nickel-metal hydride battery, this battery has a strong memory, repeated charging and discharging process is also to allow the nickel-metal hydride battery to obtain a larger charge limit. But today's cell phones are used on the lithium battery, no to repeat such a messy battery memory process. So, the lithium battery will always adhere to the higher power limit?
The answer is definitely no. Lithium battery is known for its durability, but in the process of charging and discharging through repeated battery cycles, the inevitable loss of its power ceiling, the loss is a cumulative composition, and the factors that constitute loss in addition to the normal charging, overcharge is the culprit.
How to understand the phenomenon of overcharge
Overcharge was good to understand, that is, the phone in the case of full power is still continuing to charge the phone battery, this time the storage battery manufacturer said the phone is onset of overcharge. In the battery power has been full in the case of continuous charging will lead to very material structure changes, the formation of capacity loss, and its distribution of oxygen and electrolyte will be a violent chemical reaction, the worse result is naturally a burst.
Usual knowledge also tells us that the better way to keep the battery room temperature and dry place, whether it is NiMH batteries or lithium batteries would have been the same. When the overcharge occurs, there is no doubt that the current into the heat will be a lot of emitted, and then cause the lithium battery is very electrolyte reaction, depleting the larger capacity of the lithium battery, when the heat accumulates to a certain extent, fire, bursting and other events are likely to occur.
In the face of such low security, natural cell phone manufacturers and charger manufacturers will not sit idly by. When the user has a safety problem, they are the ones who are unlucky, so there is a lot of care in charging the phone, especially with today's mainstream USB port for charging phones and chargers are very careful.
Overcharging is not a trivial matter
Energy storage battery manufacturer to tell you about the average cell phone user overcharge is really not a trivial matter, the life of the phone battery directly affects the time you use the phone, if you let the phone arbitrarily overcharge, I believe that less than a year of time the battery will die.
If you can see the reverse side of the battery is now slightly arched, it may be the fault of overcharging. To put it in perspective, overcharging even directly affects your safety, those defective batteries of copycat machines can not guarantee that they will put a firework or something. Want to fundamentally prevent overcharging, it seems that we still have to start from the moment control to do.
In order to prevent overcharging they are really very desperate
Originally, most of today's cell phones now have ic protection exists. The charger itself will also monitor the voltage and current. In order to maintain the safety of the battery and the user's use, energy storage battery manufacturers in mobile devices will usually choose trickle charging method.
When using the USB port for charging, if you do not count the loss of wire, the USB charging port will negotiate with the phone to charge and match the appropriate current, so as to ensure that the phone will not lose most of the current due to the high current input. At low battery levels, such as 10 percent or so.
At this point, the power to charge the battery is high and the current is at a high level. With the increase of the electric capacity, the phone will gradually reduce the current requested, in the back of the remaining 10% ~ 20% to reach the full charge and even the phone will request a pulse of small current for charging, and then reach the intention of maintaining the battery, this charging method is also known as trickle charging, is now the main stream of cell phone charging plan, in order to reduce the loss of the upper limit of the electric capacity and extend battery life.
In addition to the cell phone battery supply overcharge maintenance, energy storage battery manufacturer there is another way is to rely on the charging socket to prevent overcharge. Socket to supply anti-overcharge have to first supply a stable voltage, the greater the voltage fluctuations will also be affected by the current. Especially at night in China when the voltage fluctuates frequently, it is very important to ensure the stability of the output voltage of the USB port. Generally speaking, the voltage of the USB charging port is 5V, and some USB charging ports that can intelligently distribute the current will slightly reduce the voltage of the charging port when the phone's battery is close to full charge to reduce the input current to reduce the pressure on the battery.
These methods on the phone overcharge have a very good inhibitory effect, but the bottom line is that we are not unplugged in the case of the phone finished charging, so that the phone constantly repeats the process of discharging and charging, resulting in the reduction of the upper limit of electrical capacity.
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