双通道比较器热保护锂离子电池

池充电电路的一套安全温度限制。单节锂离子（锂离子）电池充电器可从USB端口或外部电源供电。
Maxim/Dallas > App Notes > AUTOMOTIVE

Keywords: battery charger, thermal protection, Li+, lithium ion, safety, set temperature limits, thermistor, Oct 01, 2003
dual comparator, window comparator, battery charging

APPLICATION NOTE 2769
Dual Comparator Thermally Protects Li+
Battery

A dual comparator and thermistor set safe temperature limits for a lithium-ion battery charging circuit. The
single-cell lithium-ion (Li+) battery charger can be powered from a USB port or external supply.


Most manufacturers recommend that Li+ (lithium-ion) batteries not be charged below 0°C or above +50°C. You
can monitor both of these limits by adding a thermistor and dual (window) comparator to a Li+ battery charger
(Figure 1).




Figure 1.This lithium battery charger derives its power from from a USB