103450 3.7V 1800mAh Chargeable Lithium Polymer Battery

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Product Details

Li-polymer Battery Principle:

There are two types of lithium-ion batteries: liquid lithium-ion batteries (LIB) and lithium polymer batteries (PLIB). Among them, the liquid lithium ion battery refers to a secondary battery in which the Li+ intercalation compound is the positive and negative electrodes. The positive electrode uses lithium compound LiCoO2, LiNiO2 or LiMn2O4, and the negative electrode uses lithium-carbon interlayer compound LixC6. The typical battery system is:

(-) C | LiPF6—EC+DEC | LiCoO2 (+)

Positive reaction: LiCoO2 = Li1-xCoO2 + xLi+ + xe-

Negative reaction: 6C + xLi+ + xe- = LixC6

Overall battery reaction: LiCoO2 + 6C = Li1-xCoO2 + LixC6

Lithium Battery Safety Questions:

All lithium-ion batteries, whether in the past or in recent years, including polymer lithium-ion batteries, lithium iron phosphate batteries, etc., are very afraid of internal short circuits, external short circuits, and overcharging.

Because the chemical properties of lithium are very active, it is easy to burn. When the battery is discharged and charged, the interior of the battery will continue to heat up, the gas generated during the activation process expands, the internal pressure of the battery increases, and the pressure reaches a certain level, such as scars on the outer casing. , that will rupture, causing leakage, fire, or even explosion.

In order to alleviate the danger of lithium-ion batteries, technicians have added ingredients that can inhibit the activity of lithium elements (such as cobalt, manganese, iron, etc.), but these cannot fundamentally change the danger of lithium-ion batteries.

When an ordinary lithium-ion battery is overcharged, short-circuited, etc., the internal temperature of the battery may rise, the positive electrode material is decomposed, and the negative electrode and electrolyte materials are oxidized, which will lead to gas expansion and increase in the internal pressure of the battery. When the pressure reaches a certain level Explosion may occur. The polymer lithium-ion battery uses a colloidal electrolyte, which does not generate a large amount of gas due to the boiling of the liquid, thus eliminating the possibility of violent explosion.

Most of the domestic polymer batteries are only soft pack batteries, using aluminum-plastic film as the shell, but the electrolyte has not changed. This kind of battery can also be thinned, its low-temperature discharge characteristics are better than that of polymer batteries, and the material energy density is basically the same as that of liquid lithium batteries and ordinary polymer batteries, but because of the use of aluminum-plastic film, it is more efficient than ordinary liquid lithium batteries. light. In terms of safety, when the liquid just boils, the aluminum-plastic film of the soft pack battery will naturally bulge or rupture, and it will not explode.

It should be noted that the new battery may still burn or expand and crack, and it is not foolproof in terms of safety. Therefore, everyone must pay attention to safety when using various lithium-ion batteries.

FAQ of lithium battery:

  • Can you customize lipo battery?
    Yes, we customize different capacity, size, charge & discharge current rate.
  • How long will customers receive samples?
    7~15 days. Will do capacity grading before delivering.
  • Which testing works will you do for customer batteries?
    We will do overcharge protect, over-discharge protect, short circuit protect, forced discharge, vibration, soak test, fall test.

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