Lithium battery fast charging technical -Lithium - Ion Battery Equipment

Lithium battery fast charging technical characteristics -Lithium - Ion Battery Equipment

In the absence of breakthroughs in mobile phone battery technology, fast charging is so important to mobile phones that even a mobile phone that does not support fast charging is embarrassed to call itself a flagship. So, what is the difference between the fast charging technologies on the market? What are the characteristics of the fast charging technologies of various manufacturers?

Models in the second half of 2015 generally adopt fast charging technology. In general, I consider charging over 10W (ie 5V2A) to be fast charging.

First, a brief look at the evolution of mobile phone charging:

In the beginning, the battery of the phone was not big. At this time, the default USB interface 5V0.5a can meet the charging needs; but after the emergence of smartphones, due to the great thirst for performance, the power consumption increases, and 0.5a cannot meet the demand; it means an enhanced USB charging identification standard: BC1 .2. The charging current can reach 5V1.5a.

However, around 2013, smartphones with more than 3000mAh appeared. At this time, even 5V1.5a cannot meet the demand, so it is extended to 5V2A again.

Common Sense 1:

The charging current is controlled by the phone, not the charger. That is, the phone is a dam, and the charger is just a reservoir. The phone will intelligently detect the load capacity of the charger. If the charger is of high power and good quality, the phone will allow the charger to carry higher currents. If the output current of the charger is too low, the phone will also limit the current it can charge.(Lithium - Ion Battery Equipment)

That's why we choose high-power chargers. For example, mobile phones support 5V1.5a input. If you buy a 5V1A charger, the phone can only be charged with 5V1A. If you buy a 5V2A charging head, the mobile phone will control the input current to be only 1.5A, so the charger load is low and there is enough margin.

Yes, I'm talking about Apple. The iPhone 6/Plus has a high charging capacity of 5V1.5a/2A, but the stingy Apple standard charger is only 5V1A. The iPhone 6 has a battery capacity of more than 1,800 mAh, but the iPhone 6 Plus has a battery capacity of nearly 3,000 mAh.

In actual testing, the iPhone 6 Plus charged 5V1.9a at peak using the iPad charger for one reason: cost savings. After all, Cook is a guy who makes a lot of money. It would be ludicrous for any fanatic to want to ignore this issue.

For now, the iPhone 6S/6S Plus is likely to follow Apple's lead as you can buy the iPhone 6S/6S Plus on facebook first and then the iPad charger

Well, let's move on to history. In fact, 5V2A is what Qualcomm calls Quick Charge 1.0 technology. Of course, in fact, in order to prevent charger load, the general mobile phone is limited to around 5V1.8a. The charging technology of Android phone 5V2A has no restrictions, no identification protocol, and anyone can use it.

But apple is an exception, the disgusting apple lighting cable not only has the certification of the charger is certified, the apple device detects that the non-original charger will limit the current to 5v/1 and 0.5 apple took a very bad supervisor self-interest to deliberately make the hardware certified And software limitations, the general purpose of our devices; brain residue fruit powder don't babble about your fruit for safety, inferior chargers whatever, the harm to you and the device is the same! 5V2A and 1A will not make any difference, 5V1A fake Apple charging head electrocuted small news?

So what are Qualcomm waiting for to wake up and make money like this? So private agreements are now in place, which means if you accidentally buy too many phones, you're going to have to get a few different chargers!

We all know that the key to improving charging speed is to increase charging power. Power (W) = Current X Voltage. The charger first reduces the mains 220V to 5V, and outputs it to the micro-USB interface of the mobile phone. Then the internal circuit of the mobile phone is stepped down to about 4.3v to charge the battery. Lowering blood pressure involves two processes.

Previously, the output voltage of the charger was 5V. We are considering how to add current. But when it hits 5V2A, the bottleneck comes: a further increase in current is bound to overwhelm the plethora of micro-USB ports and cables.



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