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Introduction to lithium battery knowledge---Lithium battery classification and application field
2023-12-15
Lithium batteries are a type of rechargeable battery that uses graphite or other carbon materials as the negative electrode and lithium-containing compounds as the positive electrode. It is a type of battery that uses lithium metal or lithium alloy as positive/negative electrode materials and uses non-aqueous electrolyte solution.
Classification of lithium batteries
1. Classification by appearance
Cylindrical lithium battery
The model name of a cylindrical lithium-ion battery is generally a 5-digit number. The first two digits are the diameter of the battery, the middle two digits are the height of the battery, and the last digit 0 represents the cylindrical shape in millimeters.
The most commonly used cylindrical lithium batteries:
18650 lithium battery
14500 lithium battery
18500 lithium battery
21700 lithium battery
26650 lithium battery
32650 (32700) lithium battery
34189 lithium battery
34207 lithium battery
Square lithium battery
Square lithium batteries usually refer to aluminum-cased or steel-cased square lithium batteries, which are widely used in exploration and mapping, medical equipment, and portable testing equipment.
2. Classification by shell
Steel case lithium battery
Most early lithium-ion batteries had steel casings. Due to the heavy weight of the steel shell, its safety is poor, but the stability of steel is strong. Later, many manufacturers optimized the design structure through safety valves, PTC and other devices, which greatly increased its safety performance. And some directly replace the steel shell with aluminum shells and soft bags, such as current mobile phone batteries.
Aluminum shell lithium battery
Aluminum-cased lithium-ion batteries are slightly better than steel-cased lithium-ion batteries due to their lighter weight and safety.
Soft packaging lithium battery
Flexible packaging lithium-ion batteries are gradually expanding their market share due to their light weight, low mold opening costs, and high safety.
3. Classification by cathode material
There are currently four types of cathode materials used in lithium-ion batteries:
Lithium cobalt oxide battery
Lithium manganate battery
Lithium iron phosphate battery
Nickel cobalt manganese (ternary) lithium battery
4. Classification by electrolyte
Liquid lithium ion battery
Liquid lithium-ion batteries use liquid electrolytes, which are organic solvents + lithium salts.
polymer li-ion battery
Polymer lithium-ion batteries are replaced by solid polymer electrolytes. This polymer can be "dry" or "colloidal". Currently, most of them use polymer colloidal electrolytes. The matrix of the polymer is mainly HFP-PVDF, PEO, PAN and PMMA.
All-solid-state lithium-ion battery
"All-solid-state lithium battery" is a lithium battery in which the electrodes and electrolyte materials used in the operating temperature range are solid and do not contain any liquid components, so the full name is "all-solid-state electrolyte lithium battery".
Application fields of lithium batteries
1.Consumer goods field
Mainly used in digital products, mobile phones, mobile power supplies, notebooks and other electronic devices. Commonly used ones include 18650 lithium battery and lithium polymer battery.
2.Industrial field
Mainly used in medical electronics, photovoltaic energy storage, railway infrastructure, security communications, exploration and mapping and other fields. Commonly used ones include energy storage/power lithium batteries, lithium iron phosphate batteries, polymer lithium batteries, and 18650 lithium batteries.
3.Special fields
Mainly used in aerospace, ships, satellite navigation, high-energy physics and other fields. Commonly used ones include ultra-low temperature lithium batteries, high temperature lithium batteries, lithium titanate batteries, explosion-proof lithium batteries, etc.
Normal discharge can still be achieved at -40℃, WORWORF 18650 32ML cell evaluation
WORWORF 26ML -45 ℃ low temperature discharge test
