Buy a power band, what should a good battery cell be like?
With the popularity of various smart phones and tablets, more and more people have begun to discover various digital products, especially the power of the mobile phone-based devices, which can no longer meet our life time in daily use. need. The emergence of mobile power can be said to solve the situation that various digital products are not enough power. So for those consumers who have not been exposed to mobile power, how do you choose a wide range of mobile power? Good power, you have to look at the battery. The battery inside the mobile power supply is like the fuel tank and transmission system of the car, which is responsible for providing continuous power to the entire mobile power supply. The mobile power circuit board can be regarded as a control system, which is mainly used for power distribution and conversion, and converts the 3.7v (or higher) voltage provided by the lithium battery into a standard 5v (or higher) voltage. To provide power to the device being charged. Therefore, the battery is the same as the engine of the car, which determines the good or bad of the mobile power.
At present, although the mobile power batteries are all lithium-ion batteries, the performance between the batteries is different. The difference between the light shape and the internal formula makes the first-time users unable to understand the mind. Below we trust the consumers from the market. The two types of batteries start with a step-by-step exploration of the mysterious world of mobile power.
● Samsung original battery
Samsung's original battery, also known as lithium silicate (licoo2), is commonly known as the 18650 liquid lithium-ion battery, of which 18650 battery is a cylindrical battery with a diameter of 18 mm and a height of 65 mm (like the amplification of the 5th battery) Version), widely used in laptop batteries, due to the common use of laptop batteries, now more than 60% of the mobile power supply on the market is also 18650 batteries. Samsung's original battery is different from other types of 18650 batteries, it has a more stringent production process, high energy conversion rate (more than 90%), low heat, built-in ptc (thermistor) can limit Excessive current, stable charge and discharge voltage, small volume, high specific energy, good cycle performance and high conductivity.
Main advantages: high energy conversion rate, low calorific value and good safety cycle performance.
The main disadvantages: the cycle life is about 500 times, it is not suitable for high-rate charge and discharge, and it is polluted to the environment after being discarded.
● lifepo4 battery
lifepo4,the biggest difference with the first two types of batteries is that the positive electrode of the battery is added with iron. lifepo4 battery has only just begun in recent years and is a potential material. Its safety performance and cycle life are incomparable to other materials, which are the most important technical indicators of power batteries. 1c charge and discharge cycle life of 2000 times, single-cell battery overcharge pressure 30v does not burn, puncture does not explode. Lithium iron phosphate cathode materials make large-capacity battery packs easier to use in series to meet the needs of electric vehicles for frequent charging and discharging. It has the advantages of non-toxic, non-polluting, good safety performance, wide source of raw materials and long service life. It is an ideal cathode material for a new generation of lithium ion batteries. At present, ferroelectric power is mainly based on large-capacity electric buses, signal base station energy storage and large-scale ups applications. Among them, mobile power and aa batteries have just begun to test water mass production, which makes ferroelectrics gradually in medium and large capacity ups and small energy storage batteries. Widely used in lawn lamps and power tools.
Main advantages: 2000 cycles of service life, high current charge and discharge, low internal friction and less heat, safe, environmentally friendly and non-toxic.
The main disadvantages: the price is expensive, the digital product field has not been used on a large scale, and the awareness in the minds of consumers is low.