Lithium battery knowledge

- Jul 04, 2019-

1.Battery characteristics

High energy density

Lithium-ion batteries weigh half as much as nickel-cadmium or nickel-hydrogen batteries of the same capacity, and are 20-30% as big as nickel-cadmium and 35-50% as big as nickel-hydrogen.

High voltage

A single lithium-ion battery has a working voltage of 3.7v (average), equivalent to three nickel-cadmium or nickel-hydrogen batteries in series.

No pollution

Lithium-ion batteries do not contain harmful metals such as cadmium, lead and mercury.

Lithium free

Lithium-ion batteries do not contain lithium metal, so they are not subject to aircraft transport rules that prohibit the use of lithium batteries in passenger aircraft.

High cycle life

Under normal conditions, lithium-ion batteries can be charged and discharged more than 500 times, and lithium iron phosphate (hereinafter referred to as ferrophosphorus) can reach 2,000 times.

No memory effect

Memory effect refers to the phenomenon that the capacity of nickel-cadmium battery decreases during the charging and discharging cycle. Lithium-ion batteries do not have this effect.

Quick charge

Using the constant current and constant voltage charger with rated voltage of 4.2v, the lithium ion battery can be fully charged in 1.5--2.5 hours. The newly developed lithium phosphorus iron battery can be fully charged in 35 minutes.

2.Main battery electrode material

Carbon negative materials

The cathode materials used in lithium ion batteries are basically carbon materials, such as artificial graphite, natural graphite, mesophase carbon microspheres, petroleum coke, carbon fiber, pyrolysis resin carbon and so on.

Tin base anode material

Tin - based anode materials can be divided into tin oxides and tin - based composite oxides. Oxides are oxides of various valence metals of tin. No commercial products.

nitrides

There are no commercial products.

Alloy class

They include tin-based alloys, silicon-based alloys, germany-based alloys, aluminium-based alloys, antimony-based alloys, magnesium-based alloys and other alloys, and there are no commercial products.

nanoscale

Carbon nanotubes, nanometer alloy materials.

Nanometer oxide

At present, according to the latest market development trend of lithium battery new energy industry in 2009, many companies have begun to use nano titanium oxide and nano silicon oxide to add in the traditional graphite, tin oxide and carbon nanotubes, greatly increasing the charge and discharge amount and times of lithium battery.