一种具有高温保护的三段式充电控制电路  

A Three⁃Stage Charging Control Circuit with High Temperature Protection

作　　者：李小波 赵海 戚祎 倪屹[1] Li Xiaobo;Zhao Hai;Qi Yi;Ni Yi(College of IOT Engineering,Jiangnan University,Wuxi 214122,China;Jiangsu Jitri Intelligent Integrated Circuit Design Technology Research Institute Co.,Ltd.,Wuxi 214122,China)

机构地区：[1]江南大学物联网工程学院,江苏无锡214122 [2]江苏集萃智能集成电路设计技术研究所有限公司,江苏无锡214122

出　　处：《半导体技术》2024年第5期492-498,504,共8页Semiconductor Technology

摘　　要：锂电池由于寿命长、容量大、质量轻等优点而应用广泛,但过充和高温都有可能对电池造成极大破坏,因此对锂电池的充电保护设计变得尤为关键。基于Cansemi 0.18μm MIXS 5 V工艺,通过多参量共同作用来调节p沟道金属氧化物半导体(PMOS)管栅极电位,以实现涓流、恒流、恒压三段式充电设计。本设计具有高温调节与保护功能,在高温充电环境下,随着温度的升高,充电电流逐渐减小。直至温度达到门限温度,充电回路彻底关闭,避免了锂电池在高温环境下依然保持大电流充电的情况。仿真以及流片测试结果表明所设计电路能实现三段式充电方式,电池能被充至4.185~4.206 V,精度达到±0.4%以内,且能够实现高温控制与保护功能。Lithium batteries are widely used due to the advantages of long lifetime,large capacity,light weight and so on,but both overcharging and high temperature may cause great damage to the battery,therefore the charging and protection design of lithium batteries becomes particularly critical.Based on Cansemi 0.18μm MIXS 5 V process,the gate potential of the p⁃channel metal oxide semiconductor(PMOS)transistor was adjusted through the interaction of multiple parameters to realize the three⁃stage charging design of trickle current,constant current and constant voltage.This design has high⁃temperature regulation and protection functions.In high⁃temperature charging environment,the charging current gradually decreases with the increase of the temperature.Until the temperature reaches the threshold tem⁃perature,the charging circuit is completely closed,avoiding the situation that lithium batteries still main⁃tain high current charging in high temperature environment.The simulation and chip test results show that the designed circuit can realize the three⁃stage charging mode,and the battery can be charged to 4.185-4.206 V with the accuracy within±0.4%,and high temperature control and protection function can be realized.

关 键 词：锂电池 充电保护 三段式充电技术 涓流/恒流/恒压 高温调节 

分 类 号：TN710.4[电子电信—电路与系统]