Atmel ATA6870锂离子电池组测量和监视方案

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..

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