The emergence of lithium-ion batteries has changed the way people use electricity, more compact lithium batteries can be more convenient and compatible with portable devices, our daily use of cell phones, Bluetooth headsets, smart bracelets, portable computers, tablets, portable electronic devices are benefited from the high performance of lithium batteries, the next lithium battery manufacturers use layman's language to explain the relevant knowledge of lithium batteries.
(A) the classification of lithium batteries
(1) according to the appearance of lithium batteries: square lithium batteries (such as commonly used cell phone battery cells) and columnar lithium batteries (such as 18650).
(2) according to the lithium battery package material: aluminum-cased lithium batteries, steel-cased lithium batteries, soft pack batteries.
(3) according to the lithium battery positive and negative materials (additives): lithium put acid (LiCoO2) batteries or lithium manganate (LiMn2O4), lithium iron phosphate batteries, disposable lithium manganese dioxide batteries; another division: lithium ion LIB, polymer PLB
4) different performance use aspects divided into.
Disposable lithium batteries - lithium manganese batteries - button-type 3-volt battery
High-capacity (high platform) lithium batteries - used in mobile digital products
High rate lithium battery; --- used in electric vehicles and power tools and model aircraft
High-temperature lithium batteries; --- for mining lamps, indoor lighting, and built-in backup power for machines
low-temperature lithium batteries; --- outdoor environment, the north (winter) Antarctica
(5) lithium batteries are also divided into two categories: non-rechargeable and rechargeable two categories.
(B) the structure of lithium batteries
Li-ion battery in the structure of the main five blocks: positive electrode, negative electrode, electrolyte, diaphragm, shell and electrode leads.
The more commonly used lithium battery materials are lithium cobaltate, lithium nickelate and lithium manganate. The most used material is lithium cobaltate, good cycle performance, manufacturing is also convenient, the disadvantage is that the cobalt compound is more expensive. Lithium nickelate is not stable and difficult to manufacture, so it is usually used more as a compound of lithium cobaltate doped with nickel, also known as lithium nickel cobaltate. Lithium manganate is also a very good material, in high temperature lithium manganate decay is relatively fast and many other reasons, most of the current applications remain in the laboratory stage.
The structure of lithium battery is mainly divided into two categories: coiled and laminated. Liquid lithium batteries use the winding structure, while polymer lithium batteries have both. Winding type will be placed in order of the positive diaphragm, diaphragm, negative diaphragm, rolled into a cylindrical or flat column, mainly represented by SANYO, TOSHIBA, SONY, ATL. The stacked type stacks positive electrode, diaphragm, negative electrode, diaphragm, and positive electrode in this way in multiple layers. All positive electrodes are welded together to lead, and negative electrodes are also welded together to lead, mainly represented by ATL.
(C) the working principle of lithium battery
When charging, lithium ions are released from the cathode lattice driven by the electric field, passed through the electrolyte and embedded in the negative lattice.
When discharging, the process is the opposite lithium ions return to the positive electrode, electrons through the external circuit to the positive electrode and lithium ion compound.
(D) the correct use of lithium batteries
(1) charge according to the standard time and procedure, even for the first three times to do so.
(2) When there is a low battery prompt, you should try to start charging in time.
(3) The activation of lithium batteries does not require a special method, the lithium battery will naturally activate in normal use. If you insist on using the "first three times 12 hours long charge activation" method, it will not actually work. Therefore, all the pursuit of 12 hours long charging and the practice of using the Li-ion battery to automatically shut down, are wrong. If you used to do it according to the wrong statement, please correct it in time, it may not be too late.
(E) lithium battery repair method
About the lithium battery repair can find a lot of content, but the actual effective may not be a few. Most of the articles are not detailed description of the repair of lithium batteries, in fact, the repair of lithium batteries is not difficult, but to restore the original state is impossible, but it is not difficult to restore part of its capacity, or restore the unusable 18650 lithium batteries to a usable state.
Before repairing the lithium battery, we need to prepare a multimeter, a single 18650 lithium battery charger, a NiMH battery charger (non-intelligent charge, if the intelligent charge, with 0V activation function is the best), a normal body of lithium batteries.
Lithium battery monoblock is used more. Strong flashlight, handheld mobile fan, rechargeable batteries, some radios, etc., many small appliances in life are used to lithium batteries, the content of this article is only suitable for the repair of such single-use lithium batteries. For the group of lithium battery group is not suitable.
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