Classification of 18650 lithium batteries

18650 lithium-ion battery production need a protection circuit, to prevent the battery overcharge discharge., of course, this is a must for lithium battery, this also is the a general disadvantages of lithium battery, because the materials used are basic cobalt acid lithium batteries, lithium materials, and cobalt acid lithium materials of lithium battery can't large current discharge, poor security, from the classification, the classification of 18650 lithium batteries can be classified in the following ways.

1, according to the battery and practical classification performance

Power battery and energy battery.Energy type battery is characteristic with high energy density, it is mainly used for high energy output;Type power battery with high power density characteristics, mainly used for instantaneous high power output, the output of the battery.Type of lithium battery and power energy is accompanied by the emergence of plug-in hybrid and appear.Stored energy is higher, it requires that the battery can support a range of pure electric drive, also want to have good power characteristics, when low battery into a hybrid model.

Simple understanding, energy type is similar to a marathon runner, must have the stamina, would require high capacity, the large current discharge performance requirements is not high;Then power type is sprinter, spelling is the force of the outbreak, but endurance also should have, or ran near capacity is too small.

2, according to the electrolyte materials

Lithium ion batteries are divided into liquid lithium ion battery (LIB) and polymer lithium ion batteries（PLB）。

Liquid lithium ion battery using liquid electrolyte (at present, a lot of power battery for this kind of).Polymer lithium ion battery with solid polymer electrolyte as a substitute for, the polymer can be "dry", also can be "colloidal", at present most of the polymer gel electrolyte.About solid-state batteries, strictly refers to the electrodes and the electrolyte are solid.

3, according to the classification of product appearance

Can be divided into: cylindrical, soft package, square.

Cylindrical and square outer packing for steel or aluminum shell shell.Soft bag packaging for aluminum film, soft bag actually is also a kind of square, used on the market called aluminum-plastic film packaging of soft bags, also some people called soft package battery polymer battery.

For cylindrical lithium ion battery, the model is generally for 5 digits.The first two digits of the diameter of the battery, and the middle two Numbers for the height of the battery.The unit is mm.18650 lithium batteries, for example, it is 18 mm in diameter, height is 65 mm.

4, according to the sheet material classification

The anode material:lithium iron phosphate batteries（LFP）、Cobalt acid lithium batteries(LCO), manganese acid lithium battery (LMO), (dual battery: nickel/nickel and cobalt acid lithium manganese acid lithium), (3 yuan: nickel cobalt manganese acid lithium battery (sliding), aluminum nickel and cobalt acid lithium batteries (NCA)).

Anode materials:Titanium acid lithium battery(LTO), graphene, carbon nanofibers.

On the concept of graphene in the market, is mainly refers to the graphene cells, namely joined graphene in extremely in the slurry, or join the graphene coating on the diaphragm.Lithium nickel acid, magnesium based battery basic does not exist in the market.

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