Talk about fast charge change | Really unified or instinct ah

When it comes to fast charging, the mobile phone screen is getting bigger and bigger, and the processor is getting more and more powerful today. As a supplement to the escaping aspect, it can be said that it is now a standard for mobile phones. Of course, there may be some low-end phones because The cost is limited, not equipped with such features, but their own performance is not strong, relative to the battery itself will be slightly better, fast charging is not their fatal injury.

Because of this physical property, we can simply understand that in order to increase the charging efficiency P, it is only necessary to increase the current I or voltage U. Of course, it is no problem if the two are upgraded, as long as the manufacturers themselves can Get the whole charge process management on the line. In the past, everyone habitually divides the fast charge technology into two types of high voltage and high current, where the high voltage is representative of the Quick Charge technology we are familiar with, and the high current represents Naturally known as charging X minutes, XVO VOOC flash charge.

However, in fact, today's point of view, the high voltage represented by Qualcomm has a varying degree of change. Among them, MTK's Pump Express 3.0 supports a large current of 5A (partially using the Type-C interface, even allowing more than 5A) Huawei's SuperCharge supports the fast charging specification of 4.5V/5A. From these, it can be seen that the trend of the industry is the dual control of voltage and current, but from the parameters, everyone is generally more willing to increase the current regulation. Amplitude, the voltage is fixed as much as 4-5V.

The two main problems are: first, the charging efficiency during fast charging, and second, the heating control during fast charging. Let's talk about heating first. We all know that the voltage of household electricity can be much higher than that needed for actual charging. The voltage, which requires the internal high voltage of the charging head to be converted into low pressure, is first adjusted once, if the 12V (12V, for example) is adjusted to the high voltage charging scheme, it will be input to the mobile terminal in the next step, because the mobile battery itself The charge admission voltage is about 4.4V, so it is not possible to directly input such a large voltage. It requires a second adjustment at the mobile phone end, and this process will generate more heat in addition to the charging behavior. If the heat dissipation design can not keep up, these heat generations will easily lead to further decline in the charging efficiency. However, the high-current solution has a small difference between the voltage control and the battery access voltage. This process pressure is much lower, so the use of large currents is faster. Charge the mobile phone when charging the temperature will be relatively calm, but the charge head heating may increase slightly.

As for the process of choosing the high voltage first and then turning to the high current, it is not directly decided by each manufacturer. The development of charging technology is often restricted by all aspects of the entire charging process. For example, the battery access current is limited. For example, the load capacity of the interface is limited. Just like the VOOC flash charge of the OPPO sign, in the era of the Micro USB interface, the general interface of the OPPO cannot satisfy the high current requirement of the OPPO. At this time, the OPPO chooses to create conditions without conditions, and forces it. Two contacts have been added to the interface. This is commendable, but in the era of Type-C interfaces that can be easily met by native standards, OPPO has not chosen to follow up. For the technical aspects, it is no problem to know that Type-1C has been supported by the DASH flash charger. After all, these two products are products of the same mother. This is something we all know.

After talking about the status quo, let's talk about the trend after another. Qualcomm is used as an example. After all, Android, most of the products still rely on Qualcomm's own power management IC. Quick Charge has now reached the QC 4+, input Part of course is to support 100-240V global voltage, while the output is 5V/3A, 9V/3A, 11V/2.4A, 12V/2.25A and other four specifications. Compared to 5C/2A QC 1.0 'fast charge' , This can be said to have made great progress in recent years. And this generation of QC 4+ is also compatible with a wider range of USB PD fast charge, yes, is that Apple is also using the USB PD fast charge. In other words, using the standard QC 4+ charging head can quickly charge the iPhone X. This is another important reason why I chose Qualcomm as an example. The great integration it actively participates in must be the next step in the development of fast charging. Where the trend is.

So, for the judgment of fast-paced future development, we now have a clearer aspect:

1. Each type of technology will work hard in both high voltage and high current. Under the same conditions, the trend of high current is better than high voltage. At the same time, the whole process of fast charging will be more precise by enhancing the adjustable range and fine degree. Control, efficiency, heat and charge speed control.

2. Each home's fast charging technology will use the compatible USB PD-based USB-based fast charging standard to achieve a certain degree of sharing among the fast charging devices. It is as if the QC 4+ charger can be used to charge the iPhone X. The USB PD protocol is free to use and will not impose additional cost burden on each product.

Of course, what needs to be said here is that the USB PD is a set of independent fast charging standards. USB-PD is not supported by the Type-C interface. For example, if one plus 5T is used, only the DASH flash charging is supported. The Type-C is only a physical interface. The format, the transmission standard on it, and the various protocols such as fast charging standards, are manufacturers' own choices. For example Xiaomi’s Xiaomi 6, although the Type-C interface is used, the data transmission speed is USB 2.0 level, not supported. Qualcomm QC 4+ fast charge (supports QC 3.0 only) but USB PD is supported.

After many generations of development, we finally got rid of most of the interfaces, simplifying the interface of the mobile phone charger. We don't want the reason that because the fast charge protocol is not compatible, we would like to use the fast charge function later but Restricted back to the previous charger can not be universal. So the various mobile phone manufacturers, ah, you still pay close attention to improve their own fast charging technology compatibility.

When it comes to fast charging, the mobile phone screen is getting bigger and bigger, and the processor is getting more and more powerful today. As a supplement to the escaping aspect, it can be said that it is the standard for the current mobile phone. Of course, there may be some low-end phones because The cost is limited, not equipped with such features, but their own performance is not strong, relative to the battery's own life will be slightly better, fast charging is not their fatal injury.

Because of this physical property, we can simply understand that in order to increase the charging efficiency P, it is only necessary to increase the current I or voltage U. Of course, it is no problem if the two are upgraded, as long as the manufacturers themselves can Get the whole charge process management on the line. Before this, everybody habitually divides fast charge technology into high voltage and high current two kinds, among them the representative of high voltage is we are familiar with Qualcomm Quick Charge technology, and the high current is represented Naturally known as charging X minutes, XVO VOOC flash charge.

However, in fact, today's point of view, the high voltage represented by Qualcomm has a varying degree of change. Among them, MTK's Pump Express 3.0 supports up to 5A of high current (partial use of Type-C interface, even allowing more than 5A) Huawei's SuperCharge supports the fast charging specification of 4.5V/5A. From these, it can be seen that the trend of the industry is the dual control of voltage and current, but from the parameters, everyone is generally more willing to increase the current regulation. Amplitude, the voltage is fixed as much as 4-5V.

The two main problems are: first, the charging efficiency during fast charging, and second, the heating control during fast charging. Let's talk about heating first. We all know that the voltage of household electricity can be much higher than that needed for actual charging. The voltage, which requires the internal high voltage of the charging head to be converted into low pressure, is firstly adjusted once, if it is adjusted to 12V (12V as an example) of the high voltage charging scheme, it will be input to the mobile terminal in the next step, because the mobile phone battery itself The charge admission voltage is about 4.4V, so it is not possible to directly input such a large voltage. It requires a second adjustment at the mobile phone end. This process also generates more heat in addition to the charging behavior. If the heat dissipation design fails to keep pace, these heat generations will easily lead to a further drop in charging efficiency. The large-current solution, because the voltage control itself and the battery access voltage are not much different, the process pressure in this step is much smaller, so the use of large currents is faster. Charge the mobile phone when charging the temperature will be relatively calm, but the charging tip may increase slightly.

As for the process of choosing the high voltage first and then turning to the high current, it is not directly decided by the manufacturers. The development of charging technology is often restricted by all aspects of the entire charging process. For example, the battery access current is limited. For example, the load capacity of the interface is limited. Just like the VOOC flash charge of the OPPO sign, in the era of the Micro USB interface, the general interface of the OPPO cannot satisfy the high current requirement of the OPPO. At this time, the OPPO chooses to create conditions without conditions, and forces it. Two contacts have been added to the interface. This is commendable, but in the era of Type-C interfaces that can be easily met by native standards, OPPO has not chosen to follow-up. For the technical aspects, it is no problem to know that Type-C has been supported by one-plus-one DASH flashing. After all, these two products are the products of a single mother. This is something we all know.

After talking about the status quo, let's talk about the trend again. Qualcomm is used as an example. After all, most Android products rely on Qualcomm's own power management IC. Quick Charge has now reached QC 4+. Part of course is to support 100-240V global voltage, while the output is 5V/3A, 9V/3A, 11V/2.4A, 12V/2.25A and other four specifications. Compared to 5C/2A QC 1.0 'fast charge' , This can be said to have made great progress in recent years. And this generation of QC 4+ is also compatible with a wider range of USB PD fast charge, yes, is that Apple is also using the USB PD fast charge. In other words, using the standard QC 4+ charging head can quickly charge the iPhone X. This is another important reason why I chose Qualcomm as an example. The great integration that it actively participates in must be the next step in the development of fast charging. Where the trend is.

So, for the judgment of fast-paced future development, we now have a clearer aspect:

Of course, what needs to be said here is that the USB PD is a set of independent fast charging standards. USB-PD is not supported by the Type-C interface. For example, if one plus 5T is used, only the DASH flash charging is supported. The Type-C is only a physical interface. The format, the transmission standard on it, and various protocols such as fast charge standards are manufacturers' own choices. For example Xiaomi’s Xiaomi 6, although the Type-C interface is used, the data transmission speed is USB 2.0, and it does not support Qualcomm QC 4+ fast charge (supports QC 3.0 only), but USB PD is supported.

After many generations of development, we finally got rid of most of the interface, simplifying the interface of the mobile phone charger. We don't want the reason that the fast charging protocol is not compatible. Restricted back to the previous charger can not be universal. So the various mobile phone manufacturers, ah, you still pay close attention to improve their own fast charging technology compatibility.