Dongguan lithium battery manufacturer analysis: lithium battery charge and discharge life

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Lithium battery life problem: Is the cycle charge and discharge once less life? Before answering this question, let us first talk about the test conditions of lithium battery cycle life.
The cycle is the use, we are using the battery, the concern is the time of use, in order to measure how long the rechargeable battery can be used for such a performance, the definition of the number of cycles is specified. The actual user usage is ever-changing, because the tests with different conditions are not comparable, and the definition of cycle life must be standardized for comparison.
National standard regulations for lithium battery cycle life test conditions and requirements: at an ambient temperature of 20 ° C ± 5 ° C, 1 C charging, when the battery terminal voltage reaches the charging limit voltage 4.2V, changed to constant voltage charging, until the charging current is less than Or equal to 1/20C, stop charging, set aside for 0.5h~1h, then discharge with 1C current to the end voltage of 2.75V. After the end of discharge, let go for 0.5h~1h, then proceed to the next charge and discharge cycle until two consecutive discharge times Less than 36min, the end of life is considered, the number of cycles must be greater than 300 times
Interpretation of the national standard:
A. This definition stipulates that the test of cycle life is carried out in deep charge and deep release.
B. The cycle life of the lithium battery is specified. According to this mode, the capacity is still more than 60% after ≥300 cycles.
However, the number of cycles obtained by different circulation systems is quite different. For example, the other conditions above are unchanged. Only the constant voltage of 4.2V is changed to the constant voltage of 4.1V to test the cycle life of the same type of battery. In this way, the battery is no longer a deep charge method. In the end, the cycle life can be increased by nearly 60%. Then if the cut-off voltage is increased to 3.9V for testing, the number of cycles should be increased several times.
This statement about the cycle of charge and discharge once less life, we should pay attention to the definition of the lithium battery charge cycle: a charge cycle refers to all the power of the lithium battery from full to empty, then from empty to full the process of. This is not the same as charging once. In addition, when you talk about the number of loops, you can't ignore the condition of the loop. It doesn't make sense to talk about the number of loops, because the number of loops is a means of detecting battery life, not the purpose!
â–² Misunderstanding: Many people like to use the mobile phone lithium-ion battery to automatically shut down and recharge, this is completely unnecessary.
In fact, it is impossible for the user to use the battery according to the national standard test mode. No mobile phone will be turned off at 2.75V, and its discharge mode is not a high current constant current discharge, but a GSM pulse discharge and a small current discharge mix. The way.
There is another measure of cycle life, which is time. Some experts have suggested that the life of a general-purpose lithium-ion battery is 2 to 3 years. In combination with actual conditions, such as the termination of life with 60% capacity, and the aging effect of lithium-ion batteries, it is time to express the cycle life. More reasonable.
Tip: For lithium-ion batteries, there is no need to use shutdown and recharge. Lithium-ion batteries are suitable for charging at any time. This is one of his biggest advantages for NiMH batteries. Please take advantage of this feature. The lithium battery is fully charged and discharged once (complete charge and discharge is not equivalent to one charge and discharge), and the cycle life is reduced once.

Waste Tire Pyrolysis Plant

The background and signification of research this waste tire pyrolysis program

As tire has been used for all other industry widely, they are playing an important role in the development of our economy, but waste tire did not easy to broken after being used and it becomes a big pollution for our environment .Therefore it is urgent to process those waste material without pollution.

In addition ,as the fastest development of world economy ,the shortage of petroleum will be urgent more and more , even the expert had stated that it will have no petroleum recover in earth after 15years later, so searching the new resource becomes an issue which is concerned by all the countries of the world.




1.Working process Of waste tire pyrolysis plant:

First, the raw materials are put into the reactor, and then seal the feeding in door, later start the machine and the reactor will be rotating and heated by coal, natural gas, wood or electricity. When the temperature reaches the degree of 250 to 280, we will get the crude oil, the oil steam will be continuous produced until the temperature reaches 350-460 C; oil steam will flow through oil gas separator, light component will enter the condensers and meanwhile the heavy oil will be discharged automatically into in heavy oil tank. The liquefied part will be condensed as crude oil, and the part which cannot be liquefied will be transferred by the water seal back to the burning chamber to be reused as heating material.

2. Model of waste tire Pyrolysis plant:

Model

Reactor size

Material

Handling capacity

Weight

Seaworthy packing

LJ-8

2200*6000mm

Q245R boiler steel plate

5 tons

24tons

2*40HQ

LJ-9

2200*6600mm

Q245R boiler steel plate

8tons

26tons

2*40HQ

LJ-10

2600*6600mm

Q245R boiler steel plate

10tons

30tons

1*40FR+1*40HQ

3.End of Product from waste tire Pyrolysis plant

NO.

Name

Percentage

Usage

1

Tyreoil

40%~45%

*can be sold directly as fuel.

* can be refine to diesel and gasoline by oil distillation plant

2

Carbon black

37%

* can be sold directly.

* can be refined by carbon black processing machine to make it finer (1500mesh finer).

*can be made into pellet by pellet machine

3

Steel wire

13%

*can be sold directly as steel or iron.

4

Waste gas

5%

* can be recycled to heat up the reactor

4. Installation: We will be in charge of arranging our engineer to go to your place to guide the installation and train your workers how to operate the pyrolysis plant,and buyer will be in charge of the food, accommodation and round air tickets.

5. Land requirement: 300sq meters(10m*30m)

6. Exporting Experience:

America:

Brazil, Canada, Colombia, USA,

Middle East:

Dubai, Iran, Jordan, Saudi Arabia, Turkey

Europe:

Albania , Bosnia and Herzegovina

Asia:

Afghanistan, India, Malaysia, Pakistan, Philippines, South Korea, Vietnam, Myanmar

Africa:

Ghana, Mozambique, Zambia

Waste Tire Pyrolysis Plant,Continuous Waste Tyre Pyrolysis Plant,Pyrolysis Plant,Environmental Waste Tire Pyrolysis Plant

Shangqiu Sihai Energy Technology Co., Ltd , https://www.sihaienergy.com