一个设计师的指导（李锂离子）电池的充电

一个设计师的指导（李锂离子）电池的充电   　　锂离子（李离子）电池的优势巩固了他们的地位作为便携式电子产品的主要动力源，尽管有一个缺点，设计师不得不限制充电速率，以避免损坏电池和创建一个危险。幸运的是，今天的李离子电池更强大，可以收取更迅速地使用“快速充电”技术。   　　本文仔细看看李离子电池的发展，电化学的最佳充电周期，以及一些快速充电电路。本文将解释加速充电的缺点，使工程师能够作出明智的选择他们的下一个充电器的设计。   　　   　　The concept behind lithium-ion （Li-ion） batteries is simple but it sTIll took four decades of effort and a lot of research dollars to develop the technology that now reliably powers the majority of today’s portable products.   　　The earliest cells were fragile and prone to overheaTIng during charging， but development has seen those drawbacks overcome. Nonetheless， recharging sTIll needs to follow a precise regimen that limits charge currents to ensure full capacity is reached without overcharging with its associated risk of permanent damage. The good news is that recent developments in materials science and electrochemistry have increased the mobility of the cell’s ions. The greater mobility permits higher charge currents and speeds up the “constant current” part of the charging cycle.   　　These developments enable smartphones equipped with the latest generaTIon of Li-ion batteries to be charged from around 20% to 70% capacity in 20 to 30 minutes. A brief battery refresh to three-quarter-capacity appeals to time-poor consumers， opening up a market sector for chargers that can safely support quick charging. Chip vendors have responded by offering designers ICs that facilitate various charging rates to accelerate battery replenishment for Li-ion cells. Faster charging is the result， but as always， there is a trade-off to be made.