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[原创] Intersil ISL94202锂电池组监测方案

关键词:电源管理 锂电池监测 ISL94202

时间:2017-04-19 10:45:22       作者:Intersil       来源:中电网

Intersil公司的ISL94202是锂电池组监测集成电路,支持三到八个电池组,支持锂离子 CoO2, 锂离子Mn2O4和锂离子FePO4化学电池,提供完整的电池监测和电池组控制,具有自动关断和恢复以及自动控制电池组的平衡,不需要微控制器.主要用在电动工具,电池备份系统,小型电动车,手持设备,能量存储系统,太阳能农场,医疗设备,监视设备和通风设备.本文介绍了ISL94202主要特性,功能框图和应用框图,以及评估板ISL94202EVKIT1Z主要特性和测试框图,电路图,材料清单和PCB设计图.

The ISL94202 is a Li-ion battery monitor IC that supports from three to eight series connected cells. It providescomplete battery monitoring and pack control. The ISL94202 provides automatic shutdown and recovery fromout-of-bounds conditions and automatically controls pack cell balancing.

The ISL94202 is highly configurable as a stand-alone unit, but can be used with an external microcontroller, whichcommunicates to the IC through an I2C interface.

ISL94202主要特性:

• Eight cell voltage monitors support Li-ion CoO2, Li-ion Mn2O4, and Li-ion FePO4 chemistries
• Stand-alone pack control - no microcontroller needed
• Multiple voltage protection options (each programmable to 4.8V; 12-bit digital value) and selectable overcurrentprotection levels
• Programmable detection/recovery times for overvoltage, undervoltage, overcurrent, and short-circuit conditions
• Configuration/calibration registers maintained in EEPROM
• Open battery connect detection
• Integrated charge/discharge FET drive circuitry with built-in charge pump supports high-side N-channel FETs
• Cell balancing uses external FETs with internal state machine or external microcontroller
• Enters low power states after periods of inactivity
• Charge or discharge current detection resumes normal scan rates

ISL94202应用:

• Power tools
• Battery back-up systems
• Light electric vehicles
• Portable equipment
• Energy storage systems
• Solar farms
• Medical equipment
• Hospital beds
• Monitoring equipment
• Ventilators

图1.ISL94202功能框图

图2.ISL94202典型应用图

评估板ISL94202EVKIT1Z

The ISL94202EVKIT1Z is a kit that facilitates testing of theISL94202 Li-ion battery pack monitor and control ICs. TheISL94202 monitors cell voltage, current, and temperature. It converts the cell voltages, pack current, and temperatures to12-bit digital values, provides cell balance control, andprovides complete stand-alone battery pack operation.

Default stand-alone operation of the ISL94202 can beoverridden by an external microcontroller. The PC basedGraphical User Interface (GUI) includes functions to monitorstand-alone operation and to demonstrate operation with anexternal microcontroller.

评估板ISL94202EVKIT1Z主要特性:

• Status LEDs monitor RGO, EOC, SD, and PSD conditions
• Jumper configuration single or split path applications
• Wakeup push button for “Exit Sleep” control
• FETs off push button for quick all FETs off condition
• Cell balance LEDs for MCB process observation
• PCB layout accommodates “solder braid” addition for highcurrent evaluation
• Software enables real time observation and data collectionof 14 analog measurements and 27 digital status indicatorsSpecifications
This board has been configured and optimized for the followingoperating conditions:
• Configurable to 3 to 8 cells, default 3 cells
• Standard cell voltage range 2.699V to 4.250V
• OV/UV delay times 1 and 4 seconds respectively
• CB maximum delta voltage 0.501
• CB maximum/minimum voltage 4.032V and 3.100V

图3.评估板ISL94202EVKIT1Z测试框图

图4.评估板ISL94202EVKIT1Z外形图

图5.评估板ISL94202EVKIT1Z电路图
评估板ISL94202EVKIT1Z材料清单:



图6.评估板ISL94202EVKIT1Z PCB设计图(1)

图7.评估板ISL94202EVKIT1Z PCB设计图(2)
详情请见:
http://www.intersil.com/content/dam/Intersil/documents/isl9/isl94202.pdf
http://www.intersil.com/content/dam/Intersil/documents/isl9/isl94202evkit1z-user-guide.pdf
isl94202.pdf
isl94202evkit1z-user-guide.pdf

 

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