Analysis of the difference between soft pack lithium battery and hard pack lithium battery

Analyzed the difference between soft pack and hard pack lithium battery Introduction to lithium battery Lithium battery is a battery that uses lithium metal or lithium alloy as the negative electrode and uses a non-aqueous electrolyte solution. The lithium metal battery was first developed and researched by Gilbert. Lewis in 1912. In the 1970s, Watson proposed and began to study lithium batteries. Due to the distinctive chemical properties of metallic lithium, there are high environmental requirements for the production, storage and application of metallic lithium. Therefore, lithium batteries have not been used for a long time. With the development of science and technology, lithium batteries have become the mainstream. Lithium batteries can be divided into two categories: lithium metal batteries and lithium batteries. Lithium batteries do not contain metallic lithium and can be recharged. The fifth-generation rechargeable battery lithium metal battery was born in 1996, and its safety, specific capacity, self-discharge rate and performance ratio are better than lithium batteries. Due to its own high-tech restrictions, only a few companies in a few countries process this kind of lithium metal batteries. Lithium battery structure Lithium battery is a replacement product for lithium battery introduced a few years ago. Its important components are the positive and negative electrodes, electrolyte, barrier and casing of the battery. Positive electrode-Choose a carbon electrode that can absorb and store lithium ions. When lithium is discharged, lithium becomes lithium ions, leaving the positive electrode of the battery and reaching the negative electrode of the lithium battery. The negative electrode selects the data of the intercalable lithium compound as close as possible to the lithium potential, such as various carbon data, including natural graphite, composition graphite, carbon fiber, central phase microspheres and metal oxides. Electrolyte-a mixed solvent system composed of LiPF6 ethylene carbonate, propylene carbonate, low-viscosity diethyl carbonate and other alkyl carbonates. Polyene microporous membranes such as polyethylene and polypropylene or their composite membranes are used for isolation, especially PP/PE/PP three-layer isolation, which not only has a low melting point, but also has high wear resistance and has a thermal safety effect. The outer shell is made of steel or aluminum materials to cover the body parts and has the function of explosion-proof power. The difference between soft lithium battery and hard lithium battery is analyzed. The working principle of lithium battery is charging and discharging. When the battery is charged, lithium ions are formed at the positive electrode of the battery, and the lithium ions reach the negative electrode through the electrolyte. Carbon is the negative electrode and has a layered structure with many micropores. Lithium ions reaching the negative electrode are inserted into the micropores of the carbon layer. The more lithium ions are inserted, the greater the charging capacity. At this time, the chemical reaction of the positive electrode attack is: the difference between the soft lithium battery and the hard lithium battery is analyzed. Similarly, when the battery is discharged (the process we use the battery), the lithium ions embedded in the negative electrode carbon will come out, back positive electrode. The more lithium ions return to the positive electrode, the greater the discharge capacity. The battery capacity we usually call refers to the discharge capacity. At this time, the negative reaction is: analyzing the difference between soft lithium batteries and hard lithium batteries, it is not difficult to see that during the charging and discharging process of lithium batteries, lithium ions are in a state of movement from the positive electrode to the negative electrode and then to the positive electrode. If we compare a lithium battery to a rocking chair, the two ends of the rocking chair are the two poles of the battery. Lithium ion is like an excellent athlete running back and forth on both ends of the rocking chair. Therefore, the experts gave the lithium battery their favorite name: rocking chair battery. Analysis of soft-packed lithium battery The soft-packed lithium battery is a liquid lithium battery with a polymer shell. In the structure, aluminum-plastic film packaging is used. When there is a hidden danger of attacking safety, the soft pack battery will only burst at most. Soft pack lithium battery parameters Rated voltage: 3.7v Working voltage: 2.4~4.2v Rated capacity: 1250mah Standard discharge continuous current: 0.2c Maximum continuous discharge current: 0.5c Working temperature: charging: 0~45℃ discharge: -20~60 ℃ Product size: MAX9.5*35*52mm Product internal resistance: 150 or less Overvoltage maintenance voltage 2.5±0.05V Lead wire type: domestic wire ul1007/24#, wire length 55mm Disclaimer: Articles published on this site The pictures and content are from the Internet. If there is any infringement, please contact to delete the previous article: How to deal with the self-discharge of lithium batteries?