Comparison of lithium polymer batteries

1. Ordinary lithium-ion battery

Lithium-ion battery, commonly known as "lithium battery", is currently the battery system with the best overall performance. The negative electrode of lithium-ion batteries is a carbon material, such as graphite. The positive electrode is a lithium-containing transition metal oxide, such as LiMn2O4.

(1) Advantages of lithium-ion batteries:

①High operating voltage The operating voltage of lithium-ion batteries is 3.7V, which is three times the voltage of functioning of nickel. cadmium and nickel-metal hydride batteries.

②High specific energy. The specific energy of lithium-ion batteries has reached 140Wh/kg, which is 3 times that of nickel-cadmium batteries and 1.5 times that of nickel-metal hydride batteries.

③Long lifespan. The lifespan of lithium-ion batteries has reached more than 1,000 times and can reach tensthousands of times at low depth of discharge, surpassing that of several other secondary batteries.

④Self-discharge is low. The monthly self-discharge rate of lithium-ion batteries is only 6-8%, which is much lower than that of nickel-cadmium batteries (25-30%) and nickel-metal hydride batteries (30-40%). %).

⑤No memory effect. It can be recharged as often as needed without degrading battery performance.

⑥No pollution to the environment. Lithium-ion batteries do not contain any harmful substances and are truly “green batteries”.

2. Lithium polymer batteries

Lithium polymer batteries are a new generation of batteries that entered the market in large quantities in 1999. Lithium polymer batteries

They are basically the same than lithium-ion batteries, except that the electrolyte is a solid polymer instead of an electroliquid lyte.

Polymer electrolytic materials are ordinary films composed of a solution in which the oxide of the host polymer, such as polyethylene, acts as an immobile solvent. The advantages of lithium polymer batteries are that they can take any shape and are relatively lightweight because they do not contain heavy metals and have a plastic shell that prevents the electrolyte from leaking. They all have better performance. The ideal lithium polymer battery has a capacity of several thousand mAh and is safer. The solid electrolyte is like a sealing gel and will not ignite or disintegrate easily during charging.

3. Comparison of two batteries

Lithium polymer battery and lithium-ion battery technology can replace Ni-Gd batteries. But the price is too high and the market has not yet fully accepted it, especially the technology.polymer thium. Brush, an analyst at Darnell Group, believes that polymer batteries will not always be more expensive than lithium-ion batteries. The production situation is in fact much more expensive, which favors the development of lithium-ion battery technology. Lithium-ion batteries used in laptops previously cost $41.42, and polymer batteries used in laptops cost $60.80.

Lithium polymer batteries have a larger capacity than lithium batteries in the same volume, and there is no memory effect (lithium ion batteries still have a memory effect, they are just smaller).

Lithium polymer battery is actually a gel-like substance that is easy to form into different shapes. It does not contain harmful heavy metal elements and is a “green battery”.

Press F5 to executer onboard diagnostics

Definition: Press F5 to run onboard diagnostics

Common English phrases about computers

1. The AC adapter power and type cannot be determined

The AC adapter cannot be correctly identified

2. The battery may not be charging

The battery may not be charged

3. The system will adjust the performance according to the available power

The system will adjust the performance configuration according to the existing power

4 Please connect a DELL 65W AC adapter or. higher for better system performance

For best system performance, please connect a DELL 65W or higher AC adapter

5. TO resolve this issue, try resealing the AC adapter

To resolve this issue, please reconnect the AC adapter

6. Press theF3 key (before F1 or F2 key) if you do not want to see powerwr warning messages again

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If you no longer want to see the power warning message, please press the F3 key (before pressing the F1 or F2 key)

7. Press F1 to continue, F2 to run the setup utility

Press F1 to continue, press F2 to run the installer

< p>Detailed information:

Frequently used computer commands

List of Start-Run commands

1. ----Group Policy

3 . Nslookup-------IP Address Detector

4. Explorer-------Open Resource Manager

5. disconnection ---- ----Disconnect command

6. tsshutdn-------Stop command with 60 second countdown

7. lusrmgr.msc----Local users and groups

8 oobe/msoobe /a----Vercheck if XP is enabled

9. -----Open Notepad

10. cleanmgr-------Cleaning the Trash

11. Net Start Messenger----Start the messaging service

13. net stop Messenger-----Stop the messaging service

14. ----Start netmeeting

15. dvdplay--------DVD player