What are the characteristics of lithium ion battery ?

(What are the characteristics of lithium ion battery ?)

What are the security features of lithium ion battery?

For the assessment indicators of the safety performance oflithium-ion batteries, very strict standards are stipulated internationally. A qualified lithium-ion battery should meet the following conditions in terms of safety performance:

(1) Short circuit: no fire, no explosion

(2) Overcharge: no fire, no explosion

(3) Hot box test: no fire, no explosion (150℃ constant temperature for 10min)

(4) Needle piercing: no explosion (penetrate the battery with a Ф3mm nail)

(5) Flat impact: no fire, no explosion (a 10kg weight hits the battery from a height of 1M)

(6) Incineration: no explosion (gas flame grill battery)

What are the advantages of lithium ion battery?

1) High voltage

The working voltage of the single battery is as high as 3.7-3.8V (3.2V for lithium iron phosphate), which is 3 times that of Ni-Cd and Ni-MH batteries.

2) Larger than energy

The actual specific energy that can be achieved is about 555Wh/kg, that is, the material can reach a specific capacity of more than 150mAh/g (3-4 times that of Ni-Cd, 2-3 times that of Ni-MH), which is close to its theoretical value. about 88%.

3) Long cycle life

Generally, it can reach more than 500 times, or even more than 1000 times, and lithium iron phosphate can reach 8000 times. For electrical appliances with low current discharge, the service life of the battery will double the competitiveness of the electrical appliances.

4) Good safety performance

No pollution, no memory effect. As the predecessor of Li-ion, the lithium battery is prone to short-circuit due to the formation of dendrites, which reduces its application field: Li-ion does not contain cadmium, lead, mercury and other elements that pollute the environment; some processes (such as sintering ) Ni-Cd battery has a major disadvantage of "memory effect", which seriously restricts the use of the battery, but Li-ion does not have this problem at all.

5) Small self-discharge

The self-discharge rate of fully charged Li-ion stored for 1 month at room temperature is about 2%, which is much lower than that of Ni-Cd, 25-30%, and 30-35% of Ni-MH.

6) Fast charging

The capacity of 1C charging for 30 minutes can reach more than 80% of the nominal capacity, and the phosphorus iron battery can be charged to 90% of the nominal capacity in 10 minutes.

7) Operating temperature

The operating temperature is -25~45°C, which is expected to be widened to -40~70°C with the improvement of electrolyte and cathode.

What are the shortages of lithium ion battery?

senescence

Unlike other rechargeable batteries, the capacity of lithium-ion batteries decays slowly, which is related to the number of uses and temperature. This phenomenon of decay can be expressed as a decrease in capacity or an increase in internal resistance.

Because it is related to temperature, it is easier to reflect in electronic products with high operating current. Replacing graphite with lithium titanate appears to increase life.

Recovery rate

About 1% of new factory products need to be recycled for various reasons.

intolerance to overcharge

When overcharged, the excess intercalated lithium ions are permanently fixed in the lattice and cannot be released anymore, resulting in short battery life.

intolerance to overdischarge

During overdischarge, the electrode deintercalates too many lithium ions, which can lead to lattice collapse and shorten life.

High quality lithium ion battery manufacturer

Luoyang Moon & Star New Energy Technology Co., LTD, founded on October 17, 2008, is a high-tech enterprise committed to the research and development, production, processing, sales and technical services of lithium ion battery anode materials. After more than 10 years of development, the company has gradually developed into a diversified product structure with natural graphite, artificial graphite, composite graphite, intermediate phase and other negative materials (silicon carbon materials, etc.). The products are widely used in high-end lithium ion digital, power and energy storage batteries.If you are looking for Lithium battery anode material,click on the needed products and send us an inquiry：sales@graphite-corp.com

(What are the characteristics of lithium ion battery ?)