What are the advantages and disadvantages of polymer lithium batteries?

Polymer lithium battery generally refers to polymer lithium ion batteries. A new generation of polymer lithium ion batteries in shape can be thin shape (ATL battery can reach 0.5 mm, the thinnest phase in the thickness of the card) and arbitrary shape, arbitrary area, greatly improving the battery design flexibility, which can meet the needs of the product, made into any shape and the capacity of the battery, for the equipment on the power supply solution developers provide some design flexibility and adaptability, in order to maximize the optimization of its product performance. At the same time, polymer lithium ion battery energy per unit has a 20% increase over the current general lithium ion battery, and its capacity, and environmental performance is lithium ion battery, there are some improvement.

Lithium-ion polymer battery advantages and disadvantages

Advantages:

1. Single cells working voltage of 3.6 v to 3.8 v is much higher than nickel-metal hydride and nickel cadmium battery voltage of 1.2 v.

2. Large capacity density, the volume density is 1.5 ~ 2.5 of nimh battery or nickel cadmium battery times, or even higher.

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

4. Long 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. Good safety performance

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. Light weight

Use polymer electrolyte battery without metal shell as a protective outer packing. Polymer battery weight is the same volume of steel shell lithium electricity 40% lighter, more aluminum shell battery20% lighter.

Large capacity of 9.

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, the ideal choice of remote control model becomes the most promising alternative products of Ni-Mh batteries.

11. The 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. The 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.

Disadvantages:

1. The cost is high, the battery electrolyte system purification difficulties.

2. The need to protect line control, overcharge or discharge will make chemical battery internal reversible destroyed, thus seriously affect the battery life.

The page contains the contents of the machine translation.