Lithium Ion Battery Safety Monitor
ADI's AD8280 won the power management sub-category for the development of a new chip that monitors the voltage and temperature of lithium-ion battery stacks in hybrid and electric vehicles.
The AD8280 is a hardware-only safety monitor for lithium ion battery stacks. The device has inputs to monitor six battery cells and two temperature sensors (either NTC or PTC thermistors). The device is designed to be daisy-chained with additional AD8280 devices to monitor a stack of significantly more than six cells without the need for numerous isolators. The output can be configured for an independent or shared alarm state.
The AD8280 functions independently from a primary monitor and contains a reference and LDO, both of which are powered completely from the battery cell stack. The reference, in conjunction with external resistor dividers, establishes trip points for the overvoltages and undervoltages. Each cell channel contains programmable deglitching circuitry to prevent alarms from transient input levels.
The AD8280 also has two digital pins that can select various combinations of inputs in the case where fewer than six cells are to be monitored. Most important, it has a self-test feature, making it suitable for high reliability applications, such as automotive hybrid electric vehicles or higher voltage industrial usage, such as uninterruptible power supplies. The AD8280 can function over a temperature range of −40°C to +105°C.
- Lithium ion battery backup monitor and threshold detection
- Electric and hybrid electric vehicle
- Industrial vehicle
- Uninterruptible power supply
- Wind and solar
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
This (UG-175) user guide describes the evaluation boards for the AD8280, which is a complete back-up monitor for lithium ion battery monitoring, integrating multiple voltages, and temperature input channels. Full details of the part, its specifications and its operating parameters are available in the AD8280 data sheet available on-line and should be consulted in conjunction with the (UG-175) user guide when using the evaluation board.
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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.