A power management system is a critical component of the system which needs Li-ion battery packs for power supply. This paper proposes a fully integrated, high-precision, and high-reliability Integrated Circuit (IC) for the power management system of Li-ion battery packs. It has full protection circuits including overvoltage, overtemperature, and overcurrent circuits with measuring voltage accuracy of 0.2 mV and a 15-bit internal Successive Approximation Register (SAR) Analog-to-Digital Converter (ADC). This IC is designed to protect the system automatically and measure the battery cells’ voltage, temperature, and charging or discharging current with high precision. It also provides an I²C interface to communicate with an external Microcontroller Unit (MCU), making it achievable to perform battery cells’ voltage balancing and SOC estimation with 0.1% estimation accuracy in an hour.

中文翻译：

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用于锂离子电池组监视和保护的电源管理IC

电源管理系统是系统的关键组件，需要锂离子电池组供电。本文提出了一种用于锂离子电池组电源管理系统的完全集成，高精度和高可靠性的集成电路（IC）。它具有完整的保护电路，包括过电压，过热和过电流电路，其测量电压精度为0.2 mV，并且具有15位内部逐次逼近寄存器（SAR）模数转换器（ADC）。该IC旨在自动保护系统，并以高精度测量电池单元的电压，温度以及充电或放电电流。它还提供了I ²C接口，可与外部微控制器（MCU）通信，可在一小时内完成电池单元的电压平衡和SOC估计，估计精度为0.1％。