电池组监控、平衡和保护系统,适用于 3、4 或 5 系列配置的锂离子和锂聚合物电池

利用多单元电池监测和平衡IC提高工业和消费类应用中的电池寿命和安全性

L9961采用高精度ADC,可通过外部NTC提供电池电压、堆叠电压和温度转换,还可通过高精度CSA监测堆叠电流,且其中内置Coulomb计数器,支持对电池组进行过流检测。
除了具备电池平衡和SOC/SOH估计功能,L9961还可有效保护电池组保险丝,以防发生火灾和爆炸危险,同时保护电池组免受过压/欠压和温度过高/过低的影响,并防止过流(双向)和放电过程中出现短路。

 

Key features of L9961

 
  • Very low current consumption in both deep-sleep mode (i.e. 2 μA) and standby mode (i.e. 5 μA)
  • High accuracy in cell voltage measurements (i.e. maximum error of ± 15 mV in the 1.5 to 4.5 V range, for -40 °C < TJ < 105 °C) with over/under voltage detection and balance under voltage protection
  • High accuracy in battery current measurements (i.e. maximum error of 0.25%) with Coulomb Counting, over current detection and short-circuit in discharge protection
  • Stack voltage monitoring with over/under voltage detection and plausibility check
     
  • Pack temperature monitoring via NTC sensor with over/under temperature detection and pack fuse management
  • I2C peripheral for device programming and data transfers over I2C bus
  • Hot plug robustness
  • Embedded NVM for configuration parameters storage
     

Application examples

Cordless power tools Cordless power tools
 UPS and backup energy storage systems
 
 
 Battery operated medical equipment

 

Recommended resources

 Robot
 

STEVAL-L99615C评估板,适用于最多有5个电池的工业BMS应用
评估套件

包含STM32G0 Nucleo-64开发板以及带有STM32G071RB固件和用户友好型GUI的专用软件包,助力缩短开发时间,降低开发成本。


User-friendly GUI for L9961 evaluation board
Software

Complete software pack includes sample scripts to enable the monitoring of key parameters such as cell voltage, battery current and temperature acquisitions, and the binary code to flash the STM32G0 Nucleo-64 development board.

 
 
 

Battery Management Systems: 36 V and beyond from BMS ICs to the MCU
Flyer

Highly scalable battery management systems from low-voltage up to 400/800/1200 V batteries for e-mobility and industrial applications.

ST makes lithium batteries perform better and last longer with high-accuracy BMS controller
Press announcement

Discover the many built-in features and advantages of our L9961 BMS device with market-leading accuracy and flexibility to enhance the performance, lifetime, and safety of Li-ion and Li-polymer batteries...