Why are soft pack polymer lithium batteries more expensive than regular batteries?

Why are soft pack polymer lithium batteries more expensive than regular batteries?

Polymer lithium batteries usually refer to lithium polymer batteries. Lithium polymer battery, also known as polymer lithium battery, is a type of battery with chemical properties. Compared to previous batteries, it has the characteristics of high energy, miniaturization, and lightweight. Lithium polymer batteries have ultra-thin characteristics and can be made into batteries with different shapes and capacities to meet the needs of some products. So why are soft pack lithium batteries more expensive? Let's continue to take a look at why soft pack polymer lithium batteries are more expensive than regular batteries?

Why are soft pack polymer lithium batteries more expensive than regular batteries?
1. The difference in shaping between soft pack polymer lithium batteries and ordinary batteries

Polymer lithium batteries can achieve thinning, arbitrary surface area, and arbitrary shape because their electrolytes can be solid or colloidal rather than liquid. Lithium batteries use electrolytes and require a sturdy outer shell as secondary packaging to contain the electrolyte. So, all of these factors contribute to an increase in weight for lithium batteries.

2. Safety aspects of soft pack polymer lithium batteries and regular batteries

At present, most polymer batteries are soft pack lithium batteries, which use aluminum-plastic film as the outer shell. When organic electrolytes are used inside, even if the liquid is very hot, it will not explode because aluminum-plastic film polymer batteries are solid or colloidal and do not leak, only naturally rupture. But nothing is absolute. If the instantaneous current is large enough to cause a short circuit fault, it is not impossible for the battery to self ignite or burst. Safety accidents on mobile phones and tablets are often caused by such situations.

3. The fundamental difference between soft pack polymer lithium batteries and regular batteries is the raw materials used
This is also the root cause of the various manifestations of the two. Polymer lithium batteries refer to the use of polymer materials in at least one of the three major components: the positive electrode, negative electrode, or electrolyte. The meaning of polymer is high molecular weight, and the corresponding concept is small molecule. Polymer has high strength, high toughness, and high elasticity. At present, the polymer materials developed for polymer batteries are mainly used for positive electrodes and electrolytes.