What are the uses, advantages and disadvantages of popular science polymer lithium batteries?

What are the uses, advantages and disadvantages of popular science polymer lithium batteries?

Summary

What are the uses, advantages and disadvantages of popular science polymer lithium batteries?

What are the uses, advantages and disadvantages of popular science polymer lithium batteries?
I believe everyone knows the polymer lithium battery, but what are its advantages and whether there are any disadvantages? Today, Janon Company will take everyone to take a look at the advantages and disadvantages of polymer lithium batteries.
Advantage:

1. Good safety performance

  The polymer lithium battery uses aluminum-plastic soft packaging in structure, which is different from the metal shell of the liquid battery. Once a safety hazard occurs, the liquid battery is prone to explode, while the polymer battery is more likely to blow up.

 

2. Small thickness, can be made thinner

   Ultra-thin, the battery can be assembled into a credit card. Ordinary liquid lithium batteries use the method of customizing the shell first, and then plugging the positive and negative electrodes. The thickness is below 3.6mm, and there is a technical bottleneck. Polymer batteries do not have this problem. The thickness can be below 1mm, which meets the needs of current mobile phones. direction.

 

3. Lightweight

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

 

4. Large capacity

Polymer batteries have a capacity of 10-15% higher than steel shell batteries of the same size and 5-10% higher than aluminum shell batteries. They have become color screen mobile phones and MMS mobile phones. Nowadays, most of the new color screen and MMS mobile phones on the market also use polymer Batteries.

 

5. Small internal resistance

The internal resistance of polymer batteries is smaller than that of ordinary liquid batteries. At present, the internal resistance of domestic polymer batteries can even be below 35mΩ, which greatly reduces the self-consumption of the battery and prolongs the standby time of the mobile phone. Level in line with international standards. This kind of polymer lithium battery that supports large discharge current is an ideal choice for remote control models, and becomes a more promising product to replace Ni-MH batteries.

 

6. The shape can be customized

   The manufacturer does not need to be limited to the standard shape, it can be economically made into a suitable size. The polymer battery can increase or decrease the thickness of the battery cell according to the needs of customers, and develop new battery cell models, which are cheap and short in mold opening cycle. Some can even be tailored to the shape of the mobile phone to make full use of the battery shell space and improve the battery. capacity.

 

7. Good discharge characteristics

   polymer battery adopts gel electrolyte, which has stable discharge characteristics and higher discharge platform than liquid electrolyte.

 

8. Simple design of protection board

  Because of the polymer material, the battery cell does not catch fire or explode, and the battery cell itself has sufficient safety. Therefore, the protection circuit design of the polymer battery can be considered to omit the PTC and fuse to save battery cost.

 

Disadvantages:

Compared with lithium-ion batteries, energy density and cycle times have decreased.

Expensive to manufacture.

There is no standard form factor, and most batteries are manufactured for the high-capacity 
consumer market.