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ATA6870主要特性及评估板系统框图和电路图

日期:2012-8-31标签: (来源:互联网)

Atmel公司的ATA6870是锂离子和NiMH电池组测量与监视电路, 主要用于混合动力汽车. ATA6870可管理多达16个电路,96个电池(三到六个电池组),为每个电池提供充电平衡能力,同时集成的线性稳压器用来给MCU或外接元件供电.本文介绍了ATA6870主要特性, 方框图, 一个和多个电池串的管理架构图,以及ATA6870 评估板系统框图和电路图.

The ATA6870 is a measurement and monitoring CIRCUIT designed for Li-ion and NiMH multicell BATTERY stacks in HYBRID electrical vehicles. The ATA6870 monitors the battery-cell VOLTAGE and the battery-cell temperature with a 12-bit ADC.

The circuit also provides charge-balancing capability for each battery-cell. In addition, a LINEAR REGULATOR is INTEGRATED to supply a MICROCONTROLLER or other external components. Reliable communication between stacked ICs is achieved by level-shifters with current sources. The ATA6870 can be connected to three, four, five or six battery-cells. Up to 16 circuits (96 cells) can be cascaded in one string. The NUMBER of strings is not limited.

ATA6870主要特性:

12-bit Battery-cell Voltage Measurement

◎ Simultaneous Battery Cells Measurement in Parallel

◎ Cell Temperature Measurement

◎ Charge Balancing Capability

– Parallel Balancing of Cells Possible

◎ Integrated Power Supply for MCU

◎ Undervoltage Detection

◎ Less than 10 μA Standby Current

◎ Low Cell Imbalance Current (< 10 μA)

◎ Hot Plug-in Capable

◎ Interrupt Timer for Cycling MCU Wake-ups

◎ Cost-efficient Solution Due to Cost-optimized 30V CMOS TECHNOLOGY

◎ Reliable Communication between Stacked ICs Due to Level Shifters with Current Sources and CHECKSUM Monitoring of Data

◎ Daisy-chainable

– Each IC Monitors up to 6 Battery Cells

– 16 ICs (96 Cells) per String

– No Limit on Number of Strings

PACKAGE QFN48 7 mm 7 mm

ATA6870应用:

◎ Battery Measurement, Supply and Monitoring IC for Li-ion and NiMH Battery Systems in Electric (EV) and Hybrid Electrical (HEV) Vehicles Benefits

◎ Highest Safety Level for Li-ion Battery Systems in Combination with ATA6871

◎ Cost Reduction Due to Integrated Measurement Circuit and High Voltage Power-supply

图1.ATA6870方框图

图2.一个电池串的管理架构图

图3.多个电池串的管理架构图

图4.ATA6870断电框图

图5.ATA6870和电池组间外接元件

图6. 内部电源的MCU电源

图7.外接电源的MCU电源

ATA6870 评估板

图8.ATA6870 评估板外形图

图9.ATA6870 评估板系统框图

图10.ATA6870 评估板电路图