News - Interpretation of technical expertise in lithium batteries

1. What is

 Lithium batteries are the batteries we use in mobile phones and electric cars. Chinese: Lee

 A more professional explanation is to use lithium metal or lithium alloy as a positive electrode material, using a non-hydrolyzed solution, which can be reused.

 Lithium batteries can be roughly divided into two categories: lithium batteries and lithium metal batteries. We used a lot of lithium batteries, and then we started to see lithium metal batteries safer, more powerful, and more cost-effective. Lithium batteries do not contain metallic lithium and can be recharged. The lithium battery described in this article is an important reference for lithium batteries.

 Lithium battery is mainly composed of two parts: battery and management system (simple management system is also called protection board). The battery is the heart of the lithium battery, and the battery management system is the brain of the lithium battery.

 Battery, BMS (Battery Management System), PCM (Protection Circuit Module)

 Lithium batteries must use a proper battery management system, otherwise they are very dangerous. Lithium batteries with a lithium battery management system are usually called lithium battery packs.

2. What is a lithium battery

    Power lithium battery is a kind of power of the battery, which refers to the application of the battery in the electric drive system. It involves the consumption of lithium batteries, such as electric vehicles, lithium batteries, lithium batteries for electric bicycles, electric tools, self-balancing cars, etc. Sometimes lithium batteries are more widespread.

 Compared with ordinary lithium batteries, power lithium batteries generally have more special requirements, such as high energy density, large volume-to-energy ratio, wide temperature range, support for high-power discharge, longer cycle life, and higher safety.

3. The structure of lithium battery

 Lithium battery is mainly composed of four parts: cathode material, cathode material, electrolyte and film.

 Lithium battery pack is mainly composed of two parts: battery and battery management system.

4. The working principle of lithium battery

 Lithium battery is a battery in which lithium ions are repeatedly inserted between the positive electrode and the negative electrode for charging and discharging. It is actually a redox reaction.

   The principle of the charging process is as follows (the opposite of the discharging process):

 Positive electrode: LiCoO2-Li (1 -) x CoO2 + (x) Li++ e-(x)

 Li++ negative: C + (x) (x) e–>CLi (x)

 Li battery reaction: LiCoO2 + C→(1-x) CoO2 + CLi (x)

5. Advantages and disadvantages of lithium batteries

 compares the advantages and disadvantages of lithium batteries with other batteries such as lead-acid batteries, nickel-cadmium batteries and nickel-metal hydride batteries.

 Lithium batteries have the advantages of high voltage, high energy density (light weight, small size), long service life, and environmental protection.

 The disadvantages of lithium batteries are their relatively high price, narrow temperature range, and certain safety risks (need to add a protection system).

Post time: Oct-29-2021