Lithium polymer battery (also known as polymer lithium battery): It is also a kind of lithium ion battery, but compared with liquid lithium battery (Li-ion), it has higher energy density, smaller size, ultra-thin and lighter weight. As well as many obvious advantages such as high safety, it is a new type of battery. In terms of shape, mobile power polymer battery have ultra-thin features, and can be made into batteries of any shape and capacity to meet the needs of various products. The minimum thickness that this type of battery can reach can reach 0.5mm. Its nominal voltage is the same as Li-ion's nominal voltage of 3.7V, and there is no memory effect.

    When an ordinary lithium ion battery is overcharged or short-circuited, the battery may heat up, the positive electrode material decomposes, the negative electrode and the electrolyte material are oxidized, etc., which will cause gas expansion and increase the internal pressure of the battery. When the pressure reaches a certain level After a certain degree, an explosion may occur. The polymer lithium ion battery uses a colloidal electrolyte, so it will not produce a large amount of gas due to the boiling of the liquid, thereby preventing the possibility of a violent explosion.

    At present, most of the domestic polymer batteries are only soft-pack batteries, using aluminum plastic film as the outer shell, but the electrolyte has not changed. This kind of battery can also be thinner, and its low-temperature discharge characteristics are better than 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 better 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 swell and crack, and safety is not foolproof.