Do you konw the difference between lithium ion batteries and polymer lithium batteries

Lithium polymer battery refers to all solid or gel too electrolyte lithium ion battery. Aluminum - plastic composite film is generally used as packaging materials. There are only two true lithium-polymer batteries in the world. Japan's SONY and China's ATL

Lithium battery generally refers to aluminum shell battery, the electrolyte is liquid, the outer packaging material is aluminum shell,

Lithium polymer batteries are safer than lithium batteries. Lithium polymer battery is the upgrading product of lithium ion battery. Compared with the current popular lithium ion battery, it has a large capacity, small size (thin), safety (will not explode) and other advantages. However, due to the replacement of the entire industrial chain needs a certain time, its cost (cost) is still relatively high, only used in high-end digital products (ultra-thin laptops, etc.).

It can be predicted that in the next 5-10 years, lithium polymer batteries will replace the existing lithium ion batteries! In fact, in the electronics industry more developed countries such as Japan and South Korea lithium polymer battery penetration rate has reached a certain level, but China is still relatively backward in this respect, let us wait and see! In the near future, mobile phones with lithium polymer batteries will be cheaper. I must replace one of them with a safer one.

Li-polymer battery (li-polymer battery) is a new type of battery, which has many obvious advantages, such as high energy density, more miniaturization, ultrathin and light weight, high security and low cost. In shape, the lithium polymer battery has the ultrathin characteristic, may cooperate each kind of product need, makes any shape and the capacity battery. The minimum thickness of such cells can be up to 0.5mm. Compared with lithium ion batteries, lithium polymer batteries have the following characteristics:

1. No battery leakage problem, the battery does not contain liquid electrolyte, using colloidal solid.

2. Can be made into thin battery: with a capacity of 3.6v400mah, its thickness can be as thin as 0.5mm.

3. The battery can be designed in various shapes.

4. The battery can be bending deformation: polymer battery maximum bending around 90 °.

5. Single high voltage can be made: liquid electrolyte battery can only get high voltage by several batteries in series, while polymer battery can be made into multi-layer combination in a single battery to achieve high voltage because there is no liquid itself.

6. The capacity will be twice that of a lithium-ion battery of the same size.

First of all, in terms of structure, the full name of lithium polymer battery should be lithium ion polymer battery, so it seems that lithium polymer battery is actually a kind of lithium ion battery. The big difference between the two is that they use different electrolytes. Lithium-ion batteries use liquid electrolytes, while polymer lithium-ion batteries use solid polymer electrolytes, which can be solid or semi-solid (colloidal).

Second, in terms of appearance, most of the mobile power sources currently on the market use cylindrical (i.e. 18650) lithium-ion batteries or lumpy lithium polymer batteries. Therefore, when we choose mobile power supply, if the outer package of the product does not specify the type of battery used, then we can simply use the thickness of the product itself to have a general understanding of the type of battery used inside.

It can be said that after years of development, lithium-ion battery technology is relatively mature, mass production has made its manufacturing cost very low. So lithium ion batteries have an advantage over lithium polymer batteries in price. That's why most laptops and other devices today use these cells.

Due to the use of liquid electrolyte of lithium ion in the case of overcharge (overcharge), will make its internal pressure surge, so in order to avoid the sealed metal shell exploded, usually this kind of battery will be in the top 18650 is equipped with a safety valve, when the battery internal pressure is too large, the top safety valve will automatically pop up, to have the effect of decompression. However, when the safety valve pops up, lithium ions leaking from the inside of the battery can still catch fire due to contact with oxygen in the air.

Compared with the lithium ion battery using liquid electrolyte, the lithium polymer battery using solid polymer electrolyte has the characteristics of ultra-thin shape, theoretical minimum thickness up to 0.5mm, arbitrary shape and arbitrary area. Greatly improved the flexibility of the battery shape features, so that it can be better made of any shape and capacity of the new generation of lithium battery.

Therefore, for the use of lithium ion cell electronic products, in its internal charge, discharge protection IC has very high requirements. But with many years development of lithium ion battery, whether the design of the battery itself or other protection IC technology are very mature, as long as in the daily use, we can do it the right to use and avoid the phenomenon of cell was hard pierced, 18650 batteries are very safe, otherwise on the market most of the laptop will not use the battery.

If strictly speaking, the lithium polymer battery is the same as the lithium ion battery using the liquid electrolyte in the positive pole, negative pole and electrolyte as well as the working principle. The only difference is the difference in the membrane and packaging materials. Therefore, fundamentally, the lithium polymer battery is also a kind of lithium ion battery.

Summary: in fact whether steel shell or soft package lithium-ion batteries, lithium-ion batteries on the safety performance is very good, after all, the current lithium-ion battery production technology is already very mature, as long as in daily use to avoid high temperature, short circuit and overcharge, piercing, and so on and so forth, to be able to avoid the "bang", the occurrence of accidents such as fire. As for the lithium ion battery and lithium polymer battery as we often say, they both have their own advantages and disadvantages. If you prefer the cost performance of the product, choose 18650 battery. If you prefer the appearance and volume of mobile power supply, then the slightly more expensive lithium polymer battery is the first choice.

Whether steel shell lithium-ion battery mobile power or soft package lithium-ion battery mobile power, on the safety performance is very good, after all, the current lithium-ion battery production technology is already very mature, as long as in daily use to avoid high temperature, short circuit and overcharge, piercing, and so on and so forth, are able to avoid what we call "bang", the occurrence of accidents such as fire. For the mobile power supply of lithium ion battery and lithium polymer battery, as we often say, both have their own advantages and disadvantages. If you prefer the cost performance of mobile power supply, choose 18650 battery. If you prefer the appearance and volume of mobile power supply, then slightly more expensive lithium polymer cell is the first choice.

Lithium polymer battery is lithium ion battery upgrading products. Relative to the lithium ion battery in fashion now, it has a large capacity, small in size (thin), security (not bang), etc. However, because of the whole industry chain and upgrading, its cost (cost) is still relatively high, only used in high-end digital products (ultrathin laptop computers, etc.).

It can be predicted that in the next 5-10 years, lithium polymer batteries will replace the existing lithium ion batteries! In fact, in the electronics industry more developed countries such as Japan and South Korea lithium polymer battery penetration rate has reached a certain level, but China is still relatively backward in this respect, let us wait and see! In the near future, mobile phones with lithium polymer batteries will be cheaper. I must replace one of them with a safer one.

Lithium polymer battery (Li - polymer, also known as the polymer lithium battery) : with high energy density, miniaturization, ultra-thin, lightweight, and high safety and low cost, and other obvious advantages, is a new type of battery. In shape, lithium polymer battery with ultra-thin characteristics, can match the needs of the various products, made into any shape and the capacity of the battery. The battery can reach the minimum thickness of 0.5 mm.

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