验证和准确跟踪可充电电池

　　验证和准确跟踪可充电电池

　　除了提供电力，用户期望电池运行安全和可预见的，并提醒他们，当他们需要充电，甚至更换。对于设计师来说，这提出了两个挑战。第一个是可靠和准确地预测电池容量。二是确保使用正宗电池的产品安全运行。

　　燃油表的集成max172xx家庭为开发人员提供了一个单芯片解决方案，提供了增强的精度和安全认证与最小的努力。

　　The battery performance factor

　　Battery performance has emerged as a major differentiator across each class of mobile product， yet users really only become aware of batteries when they fail to meet expectations. Indeed， manufacturers continue to struggle with methods for reliably presenting an accurate estimate of the charge remaining in a battery， particularly lithium-ion （Li-ion） cell battery packs.

　　Unlike earlier battery technologies， the voltage output of a Li-ion cell is flat across a wide span of its operating range and exhibits marked temperature dependency （Figure 1）。 Consequently， the conventional use of open-circuit voltage （OCV） measurements to predict cell state-of-charge （SOC） can suffer significant error when applied to Li-ion cells. Furthermore， the need for a current-sense resistor with this method means that batteries suffer a continuous power drain， even as developers look to implement strategies to extend the time between charges.