The function of lithium battery of electric tool electric hammer

In today’s society, energy shortages, environmental pollution and other issues have raised important issues for mankind. Various battery manufacturers have actively researched and developed various types of batteries, especially lithium-ion power lithium-ion batteries as an advanced representative to solve this problem. The bottleneck in the application and promotion of lithium-powered lithium-ion batteries is that a single battery in the battery pack fails during combined application, resulting in a decline in the overall performance of the battery pack and the battery pack being used over-limit.

Cordless Hammer Drill 20mm as the active material of the battery is called a lithium ion battery, which is divided into a primary lithium ion battery and a secondary lithium ion battery.


A battery that can insert and de-intercalate lithium ions with carbon data can replace pure lithium as a negative electrode, a lithium compound can be used as a positive electrode, and a mixed electrolyte can be used as an electrolyte.
The data of the positive electrode of a lithium ion battery is generally composed of active compounds of lithium, while the negative electrode is carbon with a special molecular structure. The common important component of positive data is LiCoO2. When charging, the electric potential of the battery’s north and south poles forces the compound in the positive electrode to release lithium ions, and the negative electrode molecules are embedded in the carbon in a layered structure. During discharge, lithium ions are separated from the layered carbon and recombine with the positively charged compound. Electric current occurs in the movement of lithium ions.

Although the principle of the chemical reaction is very simple, in actual industrial production, there are many practical issues to consider: the data of the positive electrode must insist on repeated charging activities for the additives, and the data of the negative electrode must contain more lithium ions at the molecular structure design level; in The electrolyte filled between the positive electrode and the negative electrode, in addition to stability, also has excellent conductivity to reduce the resistance of the battery.

Although the lithium-ion battery has almost no recall effect, its capacity will still decrease after repeated charging, which is mainly due to the changes in the positive and negative data itself. From a molecular level, the cavity structure of lithium ions on the positive and negative electrodes will gradually collapse and block. From a chemical point of view, it is the data activity passivation of the positive electrode and the negative electrode, and other compounds that are stable in the secondary reaction appear. There are also some physical conditions, such as the gradual stripping of the positive electrode data, which will eventually reduce the amount of lithium ions in the battery, allowing it to move freely during charging and discharging.

Overcharge and discharge form permanent damage to the electrodes of lithium-ion batteries. From a molecular level, it can be intuitively understood that anode carbon emissions will cause excessive release of lithium ions and a decrease in layer structure, and overcharging will cause too much The lithium ions are hardly plugged into the structure of the cathode carbon, and some lithium ions can no longer be released. This is why lithium-ion batteries are generally equipped with charge and discharge control circuits.

Post time: Sep-26-2022