Lithium ion battery is a kind of rechargeable battery. It mainly relies on the movement of lithium ions between the positive electrode and the negative electrode. The process of lithium ion entering the positive electrode material is called embedding, and the process of leaving is called deintercalation; the process of lithium ion entering the negative electrode material The process of inserting and leaving is called unplugging. Lithium-ion batteries are easily confused with the following two battery concepts. Lithium battery: Although often used as an abbreviation for lithium ion battery. However, the lithium battery of strict meaning is a lithium primary battery, and there is a simple substance of lithium. Lithium-ion polymer battery: A lithium-ion battery that replaces a liquid organic solvent with a polymer, which is safer. The iPhone battery is a lithium ion battery that is lighter, thinner, more durable, and safer than an ordinary lithium battery.
Lithium ion battery advantage:
High energy density: different depending on the electrode material, up to 150~200Wh / kg by mass (540~720kJ / kg); by volume, up to 250~530Wh / L (0.9~1.9kJ / cubic) cm). The open circuit voltage is high: it varies from electrode to material and can reach 3.3~4.2V. Large output power: different from electrode materials, up to 300~1500W / kg (@ 20 seconds). No memory effect: Lithium iron phosphate lithium-ion battery has no memory effect. The battery can be charged and discharged at any time without being emptied, and the maintenance is easy. Therefore, the newly buy lithium-ion cell phone battery does not need to be discharged first and then recharged. Low self-discharge: <5%~10%/month Intelligent lithium-ion battery has a built-in monitoring circuit, and the operating current of this monitoring circuit is even higher than the self-discharge current. Wide operating temperature range: works well between -20 ° C and 60 ° C. Charging and discharging speed are fast. Therefore, lithium ion batteries are widely used in consumer electronics, military products, and aviation products. Lithium battery has a long service life: the average life of a lithium battery is about 4 years, about 1.5 times higher than that of a lead-acid battery, and more than 500 times of charge and discharge. The battery has no memory and is highly shock-resistant. Control circuit: The lithium battery is equipped with a control circuit so that under normal temperature, the lithium battery can be continuously charged for 48 hours without accidents such as battery expansion and liquid leakage, and the capacity is maintained above 95%. And under the dedicated charger, you can perform fast charge and discharge.