Polymer batteries are polymer lithium batteries, which are a type of lithium battery. Polymer lithium batteries have many advantages compared to lithium-ion batteries. Below is a summary of the advantages of polymer lithium batteries:

1. High capacity density: Its capacity density is 1.5-2.5 times that of nickel hydrogen batteries or nickel cadmium batteries, or higher;

2. Low self discharge: After being stored for a long time, its capacity loss is also very small;

3. Long service life: Its cycle life can reach over 500 times under normal use;

4. No memory effect: there is no need to empty the remaining battery before charging, making it convenient to use;

5. Good safety performance: Because polymer lithium batteries use aluminum plastic soft packaging in their structure, which is different from the metal shell of liquid batteries. Once a safety hazard occurs, the liquid battery is prone to explosion, while polymer batteries only experience air bubbles at most.

Disadvantages of polymer lithium batteries:

1. The cost of batteries is high, and the purification of electrolyte systems is difficult.

2. It is necessary to protect the circuit control. Overcharging or discharging can damage the reversibility of chemical substances inside the battery, thereby seriously affecting the battery's lifespan.

And he voltage platform of lithium batteries is high; Compared to batteries, lithium batteries have a high energy density. Has high storage energy density; Compared to lead-acid batteries, lithium batteries are lightweight; The service life is relatively long, with a service life of over 6 years; Lithium batteries have strong adaptability to high and low temperatures. The drawbacks of lithium batteries include: poor safety and the risk of explosion; Lithium batteries made of lithium cobalt oxide materials cannot discharge at high currents and have poor safety; Lithium batteries need to protect the circuit to prevent overcharging and discharging.

In summary, if we compare the safety of lithium iron phosphate power battery packs>polymer lithium batteries>lithium-ion batteries, but from the perspective of cost and various practical application considerations, each has its own advantages and disadvantages. Therefore, mastering the situation of the above two types of batteries is conducive to a more scientific use of batteries.