Which is safer, lithium-ion battery or lithium polymer battery?

Smartphones developed from single core to 4 cores. CPU processing capability multiplied increase today, but it is still not able to solve the problem of battery capacity of mobile phone. Today's mobile phone battery capacity does not meet the user needs in daily application, and mobile power supply can satisfy the demand of users for mobile phone battery.

Often tech web site users should be seen in the network news: so-and-so brand laptop battery explosion, an explosion caused by XXX mobile charging power supply, an explosion caused by overheating or iPhone, and so on. Ask why these with battery efficiency of the device will explode? For various reasons, the key is the quality of the batteries.

Why are lithium polymer batteries more security than lithium ion batteries? It is from the structure of both. Baidu encyclopedia on the interpretation of the lithium ion battery is: the lithium ion battery is a rechargeable battery, it mainly rely on lithium ions move between the positive and negative to work. In the process of charging and discharging, Li embedded back and forth between the two electrodes and embedded off: when the rechargeable battery, Li from the anode, embedded after anode, electrolyte embedded negative in rich lithium condition; Discharge is the opposite.

Currently used in the manufacture of lithium-ion batteries, there are two kinds of raw materials, is a kind of cobalt acid lithium, the other is a lithium manganese acid. The lithium ion battery anode materials sales market now for cobalt acid lithium commonly, so also known as lithium-ion batteries cobalt acid lithium batteries. There is also a kind of lithium manganese acid lithium battery materials, the chemical properties of manganese acid lithium is more lively, short life of a charging circuit, and prone to bulge, so the application performance is low, consumer electronic products are generally not used manganese acid lithium materials of lithium ion batteries. And cobalt acid lithium materials battery structure is relatively stable, high specific capacity than lithium manganese acid, though cost than the high manganese acid lithium some valued in security than lithium manganese acid is higher, so the vast majority of consumer electronics as cobalt acid lithium battery raw materials.

In before the rise of mobile power supply, you can often come into contact with the lithium ion battery could be the battery. Maybe you will doubt, laptop battery is a cuboid is installed, and lithium ion battery is cylindrical, how to link up? The answer is that the circuit connections (parallel or series).A laptop battery electric capacity is 4400 mAh, generally this would require the lithium ion battery connected to achieve corresponding capacitance. Generally for two and three series, namely six batteries is divided into two groups of all three, three series after the parallel. The battery finally identified parameters of 11.1 V / 4400 mAh.= 3.7 V to 11.1 V ? 3, the total capacity of 4400 mAh = 2200 mAh ? 2.This also is what we usually call the six-cell battery. When buying a laptop sales people may tell you to please use original laptop battery as far as possible, don't buy fake batteries. But a piece of original laptop battery price can amount to thousands of yuan, and the same capacitance of copycat cell may only need to be controlled yuan, the price varies widely, where is the gap between them? The answer lies in batteries and circuit design.

A good batteries cost to contrast the batteries at least one times higher price, is double the price of the change is more long service life and safety of cell structure, and in the design of protection circuit will elaborate design, to the greatest extent to ensure the safety of the battery, copycat manufacturers don't do so, they are based on cost, in the absence of quality shortcomings as far as possible the compression of the cost of production, in order to sell more low price to win market share.

As the power of the batteries in the absence of circuit protection products of short circuit, lithium-ion battery is easy to happen. With an image of the metaphor, the capacity of lithium ion battery can only hold a pool of water, a steady stream of electricity charge into the pond and the pond is full, then the water will overflow, overflow but not like water, full of energy. It would have been stored in the lithium ion battery, first the overheating happens, once in the critical point of storage, there will be a blast. And at the time of the overshoot maximum protection circuit in order to maximize the protection of the batteries will not produce explosion and other bad situation.

Optionally take apart a power bank with lithium-ion battery, we can find that it must use 18650 steel shell lithium-ion battery.18650 refers that the diameter of the battery is 18 mm, length is 65 mm.18650 battery uses cobalt acid lithium as anode materials. Single battery has nominal voltage of 3.7 V, charging voltage of 4.2 V, capacity of above 1000 mAh, which is the same model of notebook battery lithium battery. It is said that some vendors will wrap up the waste batteries of the laptop, and use it on the new mobile power supply. We can't judge only by the appearance to check whether the battery is good or not. This is one of the reasons that I don't recommend lithium-ion battery for mobile power supply. As for these products, it is even difficult for insiders to judge by appearance.

The page contains the contents of the machine translation.