What is the difference between lithium polymer battery and liquid battery?

Compared with the lead-acid batteries that were widely used in the past, many lithium batteries we currently use have greatly improved in terms of work performance and safety. However, there are many types of batteries that are generally popular now, such as polymer lithium batteries and liquid batteries. Although they are all batteries, they are actually very different. Next, Grepow lithium battery manufacturers will show you the difference between lithium polymer lithium batteries and liquid batteries.

What is the difference between polymer lithium battery and liquid battery

  1. Different performance of safety factor

In terms of safety performance, polymer lithium batteries have shown great advantages, and polymer lithium batteries are mostly soft-pack batteries, and the metal casing is generally made of aluminum-plastic film. The structural material has good plasticity, flexibility and mechanical strength, and has very good performance in terms of barrier properties and heat sealing properties.see more:10kwh lithium battery

The internal electrolyte is solid or colloid, and there is no excess electrolyte, so it is more stable and will not cause dangerous situations due to overcharging, needle sticking, impact or other damage, and extremely excessive use of the battery. Of course, things are not absolute, if In extremely harsh environments, such as excessive instantaneous current, it is not impossible for a short circuit to occur.

But in comparison, lithium polymer batteries are safer and more reliable. Liquid batteries are prone to leakage, and the outer layer is relatively strong, with poor heat dissipation and explosion accidents.

  1. Different raw materials

The structural characteristics of lithium batteries mainly include three elements: positive electrode, negative electrode and electrolyte. At least one or more elements in polymer lithium batteries are made of polymer materials, and objects made of such polymers generally have high strength, high wear resistance and high elasticity.

However, as far as polymer lithium ions are prepared at this stage, polymer materials are mainly used for positive electrodes or electrolytes. The positive electrode materials are generally inorganic compounds or conductive polymers used in lithium-ion batteries, and the negative electrodes are usually made of lithium metal or lithium carbon. compound.

Electrolytes are made of solid or colloidal polymer electrolytes, which resemble plastic membranes and cannot conduct electrons, but allow the exchange of ions (chargeable atoms or groups of atoms), replacing traditional porous separators immersed in an electrolyte solution. The biggest difference in material from liquid lithium batteries is that its electrolyte is made of liquid or colloidal electrolyte.

lithium polymer battery

  1. Different electrolytes

Most liquid lithium-ion batteries use liquid organic solvents + conductive salts, while polymer lithium batteries replace these electrolytes with colloids/solids (see the battery model for specific components).

Polymer lithium battery Liquid lithium battery energy density (Wh/L)>300200~280 degrees customized (shape), flexible and difficult, light weight (no metal protective case required), heavier (metal protective case required), safe, reliable and more expensive Cheap.see more:36v 100ah lithium ion battery

  1. Different ways of shaping

Due to the different electrolytes of the two, there is a big difference in shaping. This is mainly because the electrolytes of the two are different. The electrolyte of the polymer lithium battery can be solidified, which greatly improves the flexibility of battery shaping design.

Thinning and various shapes can be achieved, theoretically the thickness can be less than 0.05mm. It can also realize any area and any shape to better meet product needs, make batteries of any shape and capacity, provide flexible power solutions for the demand side, and maximize the performance of its products.