Lithium batteries and consumer lithium batteries

Power lithium-ion batteries need to consider more reliability and consistency. After all, it takes a long time(at least 5 to 10 years), harsh environment(low temperature in winter, exposure in summer, rain, and snow), and a large number of battery strings. Considering reliability and consistency, suppose a car uses 1,000 power cells. Ideally, the car manufacturer hopes that there will be no problem with the size of a 100,000 power lithium battery car. That is, ideally, the probability of a power battery problem(safety, storage, recycling, etc.) is less than one in 100 million(of course, for the most high-end consumer batteries, Apple also requires suppliers to reach this level). Given reliability, power cells are generally designed to be more redundant, using the thicker diaphragm, foil, and shell of the power lithium battery manufacturer, so the energy density is about half of the cost of the power lithium battery manufacturer's battery.

Consumer lithium-ion batteries do not need to be reliable for a long time(the cycle does not need to be too good, because it will be changed in a year or two anyway), and generally do not need to be used alone, so there is not much requirement for consistency, but due to consumer mobile phones, pad space Limited and very precious, Therefore, consumer lithium-ion batteries have high requirements for size, capacity, and energy density.

For safety, power batteries have more external protection circuits, heat dissipation layouts, etc.. Of course, they also face worse conditions(higher external voltage, greater current, more complex external environment), and consumer batteries are protected. Less, It is necessary to rely on the material and design of the battery to resist various safety situations on the basis of higher energy density.

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