Solar street lights receive light energy through solar panels during the day, convert it into electrical energy, and store it in the battery. At night, it converts the electrical energy into light energy to bring light to pedestrians at night. Among them, although the battery does not seem to be It is eye-catching, but its role cannot be underestimated.
Now, all we use are lithium batteries. Compared with the past lead-acid batteries, work performance, safety performance, and other aspects have been greatly improved, but in fact, there are many types of lithium batteries, such as liquid batteries and polymer batteries. Although all lithium batteries are lithium batteries, they are actually quite different. Let's compare them in detail below.
1. Different raw materials
The battery structure mainly has three elements: a positive electrode, the negative electrode, an electrolyte, and at least one or more of these three types of polymer lithium batteries are made of polymer materials. The polymer here refers to objects with large molecular weight. Generally, it has high strength, high toughness, and high elasticity.
However, as for the polymer lithium ions currently produced, polymer materials are mainly applied to the positive electrode or electrolyte. The positive electrode material uses inorganic compounds or conductive polymer polymers used in general lithium-ion batteries, and the negative electrode usually uses lithium metal or Lithium-carbon intercalation compound.
The electrolyte is made of solid or colloidal polymer electrolyte. This type of electrolyte is similar to a plastic film, which cannot conduct electrons but allows ion exchange (atoms or groups of atoms that can be charged), instead of the traditional porous membrane impregnated with an electrolyte.
The main difference in materials for liquid lithium batteries is that their electrolyte is made of liquid or colloidal electrolyte.
Two, the shape is different
Due to the different electrolytes of the two, there is also a big difference in shaping, which is mainly because their electrolytes are different. The electrolyte of polymer lithium battery can be solid or colloidal, which greatly improves the flexibility of battery shape design.
It can be made thinner, theoretically it can be made with a thickness of less than 0.05mm. It can also be made into any area and shape to better meet product requirements and make batteries of any shape and capacity. This provides solar street lamp developers with a high degree of design flexibility and adaptability in power solutions. Maximize the optimization of its product performance.
The liquid lithium battery electrolyte uses electrolyte, which requires a sturdy case as a secondary package to contain it, which limits its size and shape, and adds a part of the weight to the lithium battery.
Three, different safety performance
In terms of safety, polymer lithium batteries also show great advantages, and polymer lithium batteries are mostly soft-pack batteries, and the outer shell is generally made of aluminum-plastic film. This kind of material has good ductility, flexibility, and mechanical strength, and it also performs very well in terms of barrier properties and heat-sealing properties.
