Lithium ion battery

Abstract

The invention discloses a lithium ion battery. The lithium ion battery comprises a metal outer shell, an insulated inner shell, a positive electrode plate and a negative electrode plate, wherein the insulated inner shell is arranged in the metal outer shell; the insulated inner shell is connected with the metal outer shell by glue; a polyvinylidene fluoride diaphragm is arranged on the outer side of the positive electrode plate; the positive electrode plate, the polyvinylidene fluoride diaphragm and the negative electrode plate are connected by glue in sequence from inside to outside; an insulated tape is arranged on the outer side of the negative electrode plate; the insulated tape is connected with the positive electrode plate, the polyvinylidene fluoride diaphragm and the negative electrode plate by glue; the insulated inner shell is provided with an electrolyte solution; the electrolyte solution is a propylene carbonate electrolyte solution; a solution injection hole and tabs are arranged on the metal outer shell; and the solution injection hole is communicated with the insulated inner shell. The lithium ion battery is good in heat dissipation effect, long in service life, stable and reliable in structure and convenient to maintain.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a lithium ion battery. Background technique [0002] Lithium-ion battery: It is a secondary battery (rechargeable battery), which mainly relies on lithium ions to move between the positive electrode and the negative electrode to work. During the charging and discharging process, Li+ intercalates and deintercalates back and forth between the two electrodes: charging Li+ is deintercalated from the positive electrode and inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true when the battery is discharged, and the battery generally uses a material containing lithium as the electrode, which is a representative of modern high-performance batteries. Lithium-based batteries are divided into lithium batteries. And lithium-ion batteries, mobile phones and laptops use lithium-ion batteries, commonl...

AI Technical Summary

Problems solved by technology

[0003] Rechargeable lithium-ion batteries are currently the most widely used batteries in modern digital products such as mobile phones and notebook computers. There are protection components or protection circuits on the battery to prevent expensive battery damage. The charging requirements of lithium-ion batteries are very high. To ensure that the termination voltage accuracy is within ±1%, major semiconductor device factories have developed a variety of lithium-ion batteries. Charging IC to ensure safe, reliable and fast charging. Mobile phones basically use lithium-ion batteries. Correct use of lithium-ion batteries is very important to prolong battery life. It can be made according to the requirements of different electronic products Flat rectangular, cylindrical, rectangular and button-type, and there are battery packs composed of several batteries connected in series and parallel. The rated voltage of lithium-ion batteries is generally 3.7V due to changes in materials. Lithium iron phosphate (hereinafter referred to as phosphorus Iron) positive electrode is 3.2V, the termination charging voltage when fully charged is generally 4.2V, phosphorus iron is 3.65V, and the termination discharge voltage of lithium-ion batteries is 2.75V ~ 3.0V (the battery factory gives the working voltage range or gives Termination of discharge voltage, each parameter is slightly different, generally 3.0V, 2.5V for ferrophosphorus), continuous discharge below 2.5V (2.0V for ferrophosphorus) is called over-discharge, over-discharge will damage the battery

[0004] The heat dissipation effect of lithium-ion batteries is not good, and there are certain safety hazards in long-term use, and it is inconvenient to maintain

Images