Which one is better, polymer battery or lithium-ion battery?

Polymer lithium battery is better. Lithium polymer battery is the upgrading product of lithium-ion battery. Compared with lithium-ion battery, it has the advantages of large capacity, small size and good safety. But it is more expensive.

Lithium-ion polymer batteries

1, Monomer battery working voltage of 3.6 v ~ 3.8 v is much higher than nickel-metal hydride and nickel cadmium battery voltage of 1.2 v.

2, Capacity, density, and its volume density is nickel hydrogen battery or nickel cadmium battery 1.5 ~ 2.5 times, or even higher.

3, Small self-discharge, placed in a long time after its capacity loss is very small.

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

5, No memory effect, not empty battery before charging, easy to use.

6, Safety performance is good

Lithium-ion polymer battery with aluminum composite flexible packaging in the structure, different from liquid metal case of batteries, in the event of a safety hazard, liquid batteries easy explosion, gas drum and polymer batteries will only at most.

7, Thickness is small, can do more thin

Ultra-thin, batteries could assemble into a credit card.Ordinary liquid lithium electricity use custom shell, after the plug is cathode materials, the method of thickness of 3.6 mm the following technical bottlenecks, polymer batteries, there is no this problem, the thickness can be below 1 mm, can meet the demand of current mobile direction.

8 and light weight

Using polymer electrolyte battery without metal shell as a protective outer packing.Specifications of steel shell polymer battery weight is equal capacity lithium electric light 40%, a 20% aluminum battery light.

9, Large capacity,

Polymer battery is the same size of the steel shell battery capacity, 10 to 15% more than high aluminum battery 5 ~ 10%, be the first choice of the color screen mobile phones and MMS, now on the market a new color and MMS phones are mostly used polymer batteries.

10. Small resistance

The internal resistance of the polymer batteries is less than liquid batteries, the current domestic internal resistance of the polymer batteries can even do below 35 m Ω, greatly reduced the battery power consumption, extend the standby time of mobile phone, can reach with international level. The support of large discharge current polymer li-ion battery and the ideal choice of remote control model become the most promising alternative products of Ni-Mh batteries.

11, shape can be customized

Manufacturers need not limited to the standard shape, able to make the appropriate economic size. Polymer battery can increase or decrease the thickness of the batteries according to the customer's demand, the development of new batteries models, price cheap, open mold cycle is short, some even can be tailored according to the mobile phone shape, to make full use of the battery shell space, improve battery capacity.

12, discharge characteristics

Polymer battery using gel electrolyte, compared to liquid electrolyte, colloid electrolyte with smooth discharge characteristics and higher discharge platform.

13, simple protection board design

Because of using polymer materials, batteries, no fire, no explosion, batteries itself has enough safety, therefore, polymer battery protection circuit design can consider omitting PTC and fuse, thereby saving the cost of battery.

Lithium-ion battery shortcomings

1. Lithium-ion battery has poor safety, and there is a risk of explosion.

2. Cobalt acid lithium-ion battery can't large current discharge, poor security.

3. Lithium ion battery must protect circuit, to prevent the battery was too charge discharge.

4. High requirement and high cost.

Lithium polymer batteries and lithium-ion batteries, lithium-ion polymer battery, working temperature range, cycle life and safety of environmental protection performance is good, so the lithium polymer batteries, mobile power supply is better.

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.

Lithium manganese acid lithium battery materials, the chemical properties of manganese acid lithium is lively, the life of the charging cycle is shorter, and ballooning easily occur, so the application function is low, the consumer electronics products are generally not used lithium manganese acid lithium ion battery materials. Now the cities sold by deploying the lithium ion battery anode materials for cobalt acid lithium commonly, so also known as lithium-ion batteries cobalt acid lithium batteries。

And cobalt acid lithium materials battery structures are not random, high specific capacity than lithium manganese acid, capital is than high manganese acid lithium some but in security than lithium manganese acid is higher, so the vast majority of consumer electronics as cobalt acid lithium battery raw materials.

1, High safety, cannot deny the fact that the relatively polymer batteries a bit higher than 18650 batteries for safety, or the dangers of destructive, in general, most polymer batteries is the bulge, rupture, and burning, there is no direct destructive blast.

2, The capacity is larger: compared with the general battery, the capacity of the polymer is relatively large, 100/115 mAh/g g capacity.

3, Flexible shape: due to the polymer using aluminum film packaging, has no definite shape, so can produce flat batteries, or according to the needs of different customers, customize the different shapes of batteries, meet the needs of different, very flexible.

4, Fast charging: compared to other types of batteries, polymer batteries charging speed, discharge current is relatively stable.

5 is relatively light in weight, because want to use shell at protection, polymer batteries are lighter than the same volume of 18650 batteries.

Disadvantages

1, High cost, compared to other battery, polymer battery cost almost is the highest, and it is concentrated in the difficult to reduce the electrolyte, high cost has become a major factor restricting the development of polymer battery.

2, There is no fixed model: due to the variability of shape, although more can meet the need of the market, but also led to no unified model, there is no change, thus lost the sustainability of the market.

3, Copycat serious: as the polymer battery market prospect is good, but the manufacturing cost is high, so a lot of 18650 batteries appear on the market after flattening the stronghold into polymer batteries, once the copycat crisis.

4, Low energy density: compared with other lithium-ion battery, the energy density of the polymer is relatively low, resulting in that a lot of manufacturers reduce the security protection in order to increase battery capacity.

The page contains the contents of the machine translation.