Lithium Battery Knowledge

The reason why lithium batteries (Rechargeable) need protection is determined by its own characteristics. Since the material of the lithium battery itself determines that it cannot be overcharged, overdischarged, overcurrent, short circuited, and ultrahigh temperature charge and discharge, the lithium battery assembly will always contain an exquisite protection circuit board.

1, 18650 battery is cylindrical, there is liquid inside, because of battery design and materials, 18650 is suitable for high current, so almost all notebooks, electric cars are designed with 18650 battery; only super notebook, because of energy saving, so can not be used 18650 battery and use polymer lithium battery, especially tablet computer; digital camera because of the charge and discharge of the flash requires large voltage and instantaneous high current, so only 18650 similar battery, but the volume is slightly smaller;

The 18650 lithium battery definition rule is: 18650 battery diameter is 18mm, length is 65mm, cylindrical battery. 18650 lithium battery parameters: voltage: 3.6V (conventional universal battery, for electronic products, low-power electrical equipment, maximum 1C discharge. Can change the discharge current according to the situation); 3.2V (power battery can be customized according to the situation) Charging parameters: 4.2 V

With the promotion of social energy conservation and environmental protection, more and more environmentally friendly products have been applied to the market. In the battery industry, the ternary lithium battery quickly occupied the market with numerous advantages and gradually replaced the traditional lead-acid battery. For the traditional battery, the ternary lithium battery has the advantages of long life, energy saving, no pollution, low maintenance cost, complete charge and discharge, light weight, etc. It is said that the life of the ternary lithium battery is long and to what extent?

The working principle of the lithium battery is nothing more than charging to reserve energy, and the discharge is converted into other energy and released. It is idle when it is neither charged nor discharged. Therefore, the correct use of lithium batteries has three aspects: correct charging, correct discharge, and proper maintenance.

According to the relevant provisions of the "Lithium Battery Air Transport Code" issued by the Civil Aviation Administration:

1. When the battery in the spare battery or equipment is transported as baggage, the lithium content of the lithium metal or lithium alloy battery does not exceed 2g;

2. The rated energy of the lithium ion battery should not exceed 100Wh;

3. For large-scale lithium-ion batteries with rated energy greater than 100Wh and less than 160Wh, they can be carried with them after approval by the air operator, but the number of carriers must not exceed two.

4. The equipment containing lithium battery can be placed in checked baggage or hand luggage, and the spare lithium battery can only be placed in hand luggage.

In the past ten years, with the rapid development of communication technology, mobile phone color screen technology, MMS technology, Bluetooth technology and camera technology have appeared successively, which puts higher requirements on the capacity, volume, weight and electrochemical performance of the battery. Traditional liquid lithium batteries have become increasingly unable to adapt to new demands. The emergence of a new polymer lithium-ion battery (Li-Polymer) caters to this demand.

Overcurrent and short circuit current

An overcurrent or short circuit is caused by an unknown cause (when the battery is discharged or the positive and negative electrodes are accidentally touched by metal). To ensure safety, it is necessary to stop the discharge immediately.

What is the cause of zero voltage or low voltage in a polymer lithium battery? The possible reasons are as follows:

Notice for Assembling Battery Pack

Shocks, high temperature, or contacts of sharp edge components should not be allowed in battery pack assembling process.