How does charging treasure work?

The so-called charging treasure is a portable mobile device that integrates storage, boosting and charging management. The general storage medium is a lithium ion battery. Because the current battery capacity of lithium batteries is small and large, the market circulation is also large. Moderately priced, widely used in digital products, lithium battery operating voltage is between 2.7-V4.2V. The voltage will drop with the decrease of the capacity, and the voltage of 2.7-4.2V can not directly charge the mobile phone, because the same potential voltage can not be charged, so the mobile power supply must charge other digital products, it must be To raise the voltage of your own, you can charge the digital product only by raising the voltage to 5V. Such as mobile phones, MP4, MP5, tablets, etc., then mobile power is not a one-time product, it can be used hundreds of times repeatedly, so after the mobile power is used up, we have to charge him, so you need to have a charge Management, the charge management system can automatically adjust the charging current according to the voltage of the battery. The process includes: pre-charge constant current charging, constant voltage charging and floating charging.

The following describes the components of the mobile power supply:

First, the power supply battery: commonly used polymer lithium battery, 18650 lithium battery and AAA nickel metal hydride battery.

1, polymer lithium battery: standard voltage 3.7V, more shapes, can be customized, with large capacity. Performance stability, security, mobile phones, MP3, tablet computers and other digital products.

2, 18650 lithium battery: standard voltage 3.7V, small size, large capacity, mainly used for high-end products such as laptop batteries. However, the shape is 18 refers to the battery diameter of 18.0mm 650 refers to the battery height of 65.0mm, so a thicker shell is required to be installed under.

3, AAA nickel-metal hydride battery: standard voltage 1.2V, relatively small capacity, widely used in toys, household appliances and other small products.

Second, boost system <br> boost mainstream technology basically uses DC-DC boost mode, the domestic technology generally low conversion rates generally around 70%, Taiwan bending of around 75% -85%, of the United States Relatively high, but also useful in the bucking scheme, the suburban rate is relatively high, but the consistency of the cell is high, so it is rarely used.
Third, currently charging management <br> charge management technologies are relatively mature, smart IC controls the entire charging process, charging excessive adverse effect on the battery life, so now the general mobile power charging current 1A generally only ** about. Just give 1A mobile phone, and digital products to charge, so you can extend the battery life.