Lithium polymer battery is good or lithium ion battery is good

The polymer battery is good.

Lithium polymer batteries are upgraded products of lithium ion batteries. Compared with the current popular lithium-ion battery, it has the advantages of large capacity, small size (thin), and safety (no explosion). However, due to the time required for the replacement of the entire industry chain, its cost (cost) is still relatively high, and it is only used in high-end digital products (ultra-thin notebook computers, etc.).

The advantages of polymer lithium battery are mainly as follows:

1. The operating voltage of the single cell is as high as 3.6v~3.8v, which is much higher than the 1.2V voltage of Ni-MH and Ni-Cd batteries.

2. The capacity density is large, and the capacity density is 1.5 to 2.5 times or higher of the nickel-hydrogen battery or the nickel-cadmium battery.

3. Self-discharge is small, and its capacity loss is small after being placed for a long time.

4. Long life, normal use of its cycle life can reach more than 500 times.

5. There is no memory effect. It is not necessary to empty the remaining power before charging, which is convenient to use.

6. Good safety performance

The polymer lithium battery is made of aluminum-plastic flexible packaging, which is different from the metal casing of the liquid battery. Once the safety hazard occurs, the liquid battery is easy to explode, and the polymer battery can only be air-blasted at most.

7. Small thickness, can be made thinner

Ultra-thin, the battery can be assembled into a credit card. Ordinary liquid lithium battery adopts the method of customizing the outer casing and plugging the positive and negative materials. The thickness is 3.6mm or less. There is a technical bottleneck. The polymer battery core does not have this problem. The thickness can be less than 1mm, which is in line with the current demand of mobile phones. .

8. Light weight

A battery using a polymer electrolyte does not require a metal shell as a protective outer package. The weight of the polymer battery is 40% lighter than the steel shell lithium battery of the same capacity specification, which is 20% lighter than the aluminum shell battery .

9. Large capacity

The polymer battery has a capacity of 10-15% higher than that of the same size steel shell battery, which is 5-10% higher than that of the aluminum shell battery. It is the first choice for color screen mobile phones and MMS mobile phones. Nowadays, the new color screen and MMS mobile phones on the market are mostly used polymer batteries.

10. Small internal resistance

The internal resistance of the polymer battery core is smaller than that of the general liquid battery. At present, the internal resistance of the domestic polymer battery core can even be less than 35mΩ, which greatly reduces the self-consumption of the battery and prolongs the standby time of the mobile phone, can reach with international level. This polymer lithium battery that supports large discharge currents is an ideal choice for remote control models and is the most promising alternative to nickel-metal hydride batteries.

11. Shape can be customized

Manufacturers are not limited to standard shapes and can be economically made to the right size. Polymer batteries can increase or decrease the thickness of batteries according to customers' needs. Develop new battery models, which are cheap, open cycle is short, and some can even be customized according to the shape of mobile phones to make full use of battery casing space and upgrade batteries capacity.

12. Good discharge characteristics

The polymer battery uses a colloidal electrolyte, which has a smooth discharge characteristic and a higher discharge platform than a liquid electrolyte.

13. The protection board is simple in design

Due to the use of polymer materials, the battery core does not ignite or explode, and the battery core itself has sufficient safety. Therefore, the protective circuit design of the polymer battery can be omitted by omitting the PTC and the fuse, thereby saving battery cost.

Lithium-ion battery: It is a secondary battery (rechargeable battery) that mainly relies on the movement of lithium ions between the positive and negative electrodes. During the discharge process, Li is intercalated and deintercalated between the two electrodes; when charging, Li is detached from the positive electrode, and the electrolyte is embedded in the negative electrode, and the negative electrode is in a lithium-rich state; the application prospects of lithium-ion batteries are very broad. At present, they are mainly used in mobile phones and notebook computers, and are representative of modern high-performance batteries.

Lithium polymer battery: According to the electrolyte material used in lithium ion battery, lithium ion battery is divided into liquid lithium ion battery (Liquified Lithium-Ion Battery, LIB for short) and polymer lithium ion battery (Polymer Lithium-Ion Battery, PLB for short) or plastic. Lithium-ion battery (Plastic lithium ion batteries, abbreviated as PLB). The positive and negative materials used in the polymer lithium ion battery are the same as the liquid lithium ions. The positive electrode material is divided into lithium cobaltate, lithium manganate, ternary material and lithium iron phosphate material, and the negative electrode is graphite. The working principle of the battery is also basically Consistent. The main difference is that the electrolyte is different. The liquid lithium ion battery uses a liquid electrolyte, and the polymer lithium ion battery is replaced by a solid polymer electrolyte. The polymer can be either "dry" or "colloidal". Most of the current polymer gel electrolytes are used.

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