There are still many people who have such doubts: Are lithium batteries all the same, and what can be the difference. If you want to truly understand the essential application requirements of power lithium batteries and ordinary 3C lithium batteries, what are the differences between power lithium batteries and ordinary 3C lithium batteries must be better understood, then what is the difference between power lithium batteries and ordinary 3C lithium batteries?

　　Ternary power lithium battery

　　1. The difference between power lithium battery and ordinary 3C lithium battery is analyzed in terms of application:

　　1. Power lithium batteries can be used in electric vehicles, electric vehicles, power tools and other high-rate discharge products, while ordinary 3C lithium batteries are only used in mobile phones, bracelets, digital cameras, notebook computers, mobile power supplies, etc. It can meet the demand of ordinary discharge power supply.

　　2. Battery discharge current. In product application, it can be understood that power lithium batteries generally refer to 5C current discharge as the standard. If it is an ultra-high rate power battery, it can be discharged at a current of 10C or 30C; ordinary 3C lithium batteries are general Take the current discharge current below 3C as the standard judgment.

　　2. Design analysis of power lithium battery and ordinary 3C lithium battery:

　　1. The R&D and design of lithium iron phosphate power lithium-ion batteries need to consider more reliability and consistency. After all, it will take a long time (at least 5-10 years), harsh environments (low temperature in winter, exposure to sunlight in summer, rain and snow), and a lot of The batteries are used in series and parallel groups. Considering reliability and consistency, assuming that a car uses 1,000 power batteries, ideally, the car manufacturer hopes that there will be no problems with the scale of 100,000 vehicles per model, that is, the power battery is ideally required The probability of problems (safety, storage, recycling, etc.) should be less than one in 100 million (of course, for the highest-end consumer batteries, Apple also requires suppliers to this level). Considering reliability, power batteries are generally designed with more redundancy, using thicker diaphragms, foils and casings, so the energy density is about half that of consumer batteries.

　　2. In the R&D and design of ordinary consumer lithium-ion batteries, safety and durability need to be considered more, and long-term reliability is not required (the cycle does not need to be too good, because it will be replaced in one or two years), and generally do not need to be equipped The group is used alone, so there is not much requirement for consistency. However, due to the limited space and preciousness of consumer mobile phones and tablet computers, consumer lithium-ion batteries have strict requirements on size, capacity, and energy density.

　　3 The difference between power lithium batteries and ordinary lithium batteries For product safety, power batteries have more external protection circuits, heat dissipation layouts, etc., of course, they also face more severe conditions (higher external voltage, greater current, and more complex The external environment), consumer batteries have less protection, and on the basis of higher energy density, the materials and design of the battery can withstand various safety threats; while high-end consumer mobile phone lithium batteries use the most advanced Technology and materials, and power batteries require more advanced process control, consistency control and quality management.