Which is better, polymer lithium battery or 18650 battery?
Polymer lithium battery pack cells
The light and thin shape of polymer cells is the rich and handsome in the battery cell industry. The shape can be customized arbitrarily, and ultra-thin batteries can be produced, such as 0.25mm, so the mobile power supply using polymer batteries can also be designed more flexibly in appearance. Now many smart wearable device batteries use polymer lithium batteries, which can make their products look better in appearance. The design is more fashionable and casual.
The shape of the 18650 battery is fixed, which is short and bright in the cell world. It looks like a AA battery, and it is generally cylindrical. Shaped steel shell packaging, inside is liquid lithium ion electrolyte. The 18850 battery can only be in the shape of a column. If you are buying a mobile power supply that has a thick and large shape, you can basically be sure that the 18550 battery cell is used.
Large polymer lithium battery capacity
The polymer lithium battery and 18650 battery of the same volume have a larger polymer capacity, which is about 30% higher. Buy a large-capacity mobile power supply , It is best to choose polymer, which is thinner and more portable.
The capacity of 18650 battery is small
The capacity of 18650 battery is generally 2200mAh,
2400mAh and 2600mAh three specifications, using 18650 batteries The mobile power supply is basically realized in parallel with the above specifications.
It is conceivable that the 18650 mobile power supply is above 8000 mA. The shape must be relatively large.
Service life of polymer lithium battery VS18650 battery
The polymer lithium battery can be charged and discharged more than 1000 times, and the capacity is ignorantly reduced.
The 18650 battery can be charged and discharged more than 500 times, and the capacity is reduced by about 30%.
Safety Polymer lithium battery VS18650 battery
Polymer electric oil is made of an aluminum film and a layer of high-strength tape, which will never explode, at most The most evil situation is to produce burning and produce fire. Therefore, compared with 18650, polymer batteries are still very flexible.
Due to the special nature of the 18550 battery packaging (using a steel shell), it is prone to short circuits. If the quality of the product produced is not satisfactory, the biggest danger is explosion. There have been cases of explosions before.
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