What are the types of lithium batteries?

First, the lithium battery according to the external type: square lithium battery (such as commonly used mobile phone battery cells) and column (such as 18650);

2. Lithium battery outsourcing materials: aluminum shell lithium battery, steel shell lithium battery, soft pack battery;

3. Lithium battery from positive and negative materials (additives): lithium niobate (LiCoO2) battery or lithium manganate (LiMn2O4), lithium iron phosphate battery, disposable manganese dioxide lithium battery; another point: lithium ion LIB , polymer PLB

Fourth, different performance uses:

Disposable---lithium-manganese battery--button type 3 volt battery

High capacity (high platform) - used in mobile digital products

High magnification; --- used in electric vehicles and power tools and aircraft models

High temperature; --- miner's lamp, room lighting, built-in backup power supply;

Low temperature---outdoor environment, north (winter) south pole;

The mainstream of lithium batteries used in automotive batteries in China's electric vehicle industry is three kinds of iron lithium, manganese lithium and ternary.

1. Cheap. 2. The low temperature performance is good, and the discharge at minus 20 degrees under zero can have an efficiency of more than 90%. 3. Good safety performance.

1. High temperature performance is poor 2. Cycle life is low (normal normal service life is about 300 to 400 times) 3. Keby capacity is low (112) 4. Magnification discharge is poor (such as when the car is uphill and fast start, right this type of battery has a big impact)

1. The price is the most expensive of the three materials

2. High capacity (150. Can save volume)

3. Good cycle life (600 to 700 times) 4. Excellent rate of discharge

1. Safety performance is the worst of the three (especially with steel shells) 2. At present, the Chinese battery industry is still not mature enough to use the material, and not much.

Iron lithium 1. The price is 2. The capacity is (130) 3. The cycle life is high (about 1500 times) 4. The high temperature performance is good 5. The rate is good.

1. The price is not cheap 2. The low temperature performance is not good 3. In the electric car can fully reflect its superior performance (can be fully charged in 6 minutes, can discharge 20 times)

Lithium-ion battery: It is a secondary battery (rechargeable battery) that mainly relies on lithium ions moving between the positive and negative electrodes to work. During charge and discharge, Li+ is intercalated and deintercalated between the two electrodes: when charging, Li+ is deintercalated from the positive electrode, and the electrolyte is embedded in the negative electrode, and the negative electrode is in a lithium-rich state;

Lithium batteries are classified into lithium batteries and lithium ion batteries. Both mobile phones and laptops use lithium-ion batteries, which are commonly referred to as lithium batteries. The battery generally uses a lithium-containing material as an electrode and is representative of modern high-performance batteries. True lithium batteries are rarely used in everyday electronics because of their high risk.

The lithium-ion battery was first developed by Sony Corporation of Japan in 1990. It is to insert lithium ions into carbon (petroleum coke and graphite) to form a negative electrode (lithium for lithium batteries or lithium alloys for conventional lithium batteries). The positive electrode material is commonly used for LixCoO2, LixNiO2, and LixMnO4, and LiPF6+diethylene carbonate (EC) + dimethyl carbonate (DMC) for the electrolyte.

Petroleum coke and graphite as non-toxic materials are non-toxic and have sufficient resources. Lithium ions are embedded in carbon, which overcomes the high activity of lithium and solves the safety problems of traditional lithium batteries. The positive LixCoO2 can reach the charge and discharge performance and life. The higher the level, the lower the cost, and the overall performance of the lithium-ion battery is improved. It is expected that lithium-ion batteries will occupy a large market in the 21st century.

The reaction formula for charging and discharging lithium ion secondary batteries is LiCoO2+C=Li1-xCoO2+LixC[1]

Lithium-ion batteries are easily confused with the following two types of batteries:

(1) Lithium battery: Metal lithium is used as a negative electrode.

(2) Lithium-ion battery: A non-aqueous liquid organic electrolyte is used.

(3) Lithium ion polymer battery: a polymer is used to gel a liquid organic solvent, or an all-solid electrolyte is directly used. Lithium-ion batteries generally use a graphite-based carbon material as a negative electrode.

Steel shell / aluminum shell / cylinder / flexible packaging series:

(1) Positive electrode - the active material is generally lithium manganate or lithium cobalt oxide, lithium nickel cobalt manganese oxide material, electric bicycle is generally used nickel cobalt cobalt manganate (commonly known as ternary) or ternary + small amount of lithium manganate, pure Lithium manganate and lithium iron phosphate gradually fade out due to their large size, poor performance or high cost. The electrode fluid is an electrolytic aluminum foil having a thickness of 10 to 20 μm.

(2) Separator - a specially formed polymer film with a microporous structure that allows lithium ions to pass freely without electrons passing.

(3) Negative electrode - The active material is graphite, or carbon of approximately graphite structure, and the conductive current collector uses an electrolytic copper foil having a thickness of 7-15 μm.

(4) Organic electrolyte - a carbonate solvent in which lithium hexafluorophosphate is dissolved, and a polymer electrolyte is used as the polymer.

(5) battery case - divided into steel shell (square type is rarely used), aluminum shell, nickel-plated iron shell (used in cylindrical battery), aluminum plastic film (soft packaging), etc., as well as the battery cap, but also the battery is positive Negative terminal.

Lithium-ion batteries are classified into a liquid lithium ion battery (Liquified Lithium-Ion Battery, abbreviated as LIB) and a polymer lithium ion battery (Polymer Lithium-Ion Battery, abbreviated as PLB), depending on the electrolyte material used in the lithium ion battery.

Lithium-ion battery (Li--ion)

Rechargeable lithium-ion batteries are currently the most widely used batteries in modern digital products such as mobile phones and notebook computers, but they are more "squeaky" and cannot be overcharged or over-discharged during use (which can damage the battery or cause it to be scrapped). Therefore, there are protective components or protection circuits on the battery to prevent expensive battery damage. Lithium-ion battery charging requirements are very high, to ensure that the termination voltage accuracy is within ±1%, major semiconductor device manufacturers have developed a variety of lithium-ion battery charging IC to ensure safe, reliable and fast charging.

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