驗證和準確跟蹤可充電電池

　　除了提供電力，用戶期望電池運行安全和可預見的，并提醒他們，當他們需要充電，甚至更換。對于設計師來說，這提出了兩個挑戰(zhàn)。第一個是可靠和準確地預測電池容量。二是確保使用正宗電池的產品安全運行。

　　燃油表的集成max172xx家庭為開發(fā)人員提供了一個單芯片解決方案，提供了增強的精度和安全認證與最小的努力。

　　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.