Which battery cell is better for the mobile power supply?

Which battery cell is better for the mobile power supply?

Smartphones are equipped with higher and higher configurations, and their power consumption is getting worse. Some mobile phones such as iPhone batteries cannot be replaced. In the case of power shortages, only mobile power sources (also called power banks or external batteries, etc.) can be used. Come to the rescue, so it has created a boom in the current mobile phone mobile power market sales. Many consumers only pay attention to the appearance, capacity and price when choosing mobile power supplies. It is often difficult to understand the internal conditions of mobile power supplies. Today we will introduce mobile power supplies to everyone, starting with the battery core of the power supply.

First, briefly understand the composition of the mobile power supply:

　　 1. The outer shell is mainly used for product packaging, as well as for achieving beautiful appearance and protection. It is usually plastic and metal. Some better products often use fireproof materials for plastic;

　　2. The battery cell, which is our common battery, is the power storage warehouse of the mobile power supply;

　　3. The circuit board is mainly used to realize voltage and current control, input and output control, and realize various other functions.

Batteries are the most expensive component of mobile power sources. The most common one is 18650 batteries and the other is polymer batteries. These two batteries dominate the lithium battery industry with a large share of the market.

2. Mobile power cell

　　1, 18650 batteries

18650 lithium ion battery

18650 is called in the industry. It refers to a cylindrical battery with a diameter of 18mm and a length of 65mm. International manufacturers such as Sanyo, Panasonic, Samsung, and Sony have this business, and many domestic manufacturers are also producing and selling 18650. Batteries, most of the mobile power sources seen in the market, use 18650 batteries, and in order to fight costs, they basically use domestic products, and few use imported 18650 batteries.

　　 Mobile power with 18650 batteries

　　 18650 capacity, generally the most common three specifications are 2200mAh, 2400mAh and 2600mAh. According to reports, the current 18650 has the largest single-cell capacity of 3400mAh. The mobile power supply with 18650 batteries is basically realized in parallel with the above specifications. 18650 is generally packaged in a cylindrical steel shell, and the internal lithium ion is liquid. Because it is already an industry standard specification, the 18650 can only be cylindrical. If you see a thick and large shape when buying a mobile power supply, you can basically be sure that the 18650 battery core is used.

2. Polymer batteries Lithium polymer batteries

Lithium polymer batteries, the raw materials are generally mixed with lithium cobalt oxide, lithium manganate, and ternary lithium. The outer packaging is mainly made of aluminum-plastic film, and the lithium material in the middle is paste-like, so the shape can be customized, such as 0.25 The ultra-thin battery such as mm, so the mobile power supply using polymer cells, can also be designed more flexible in appearance. For example, some ultra-thin mobile power supplies on the market and iPhone4 mobile phone back clamps all use polymer batteries.