Battery Pack and Link Monitors

The ADBMS2960 and ADBMS2962 are battery pack monitors and the ADBMS2961 is a link monitor for electrical and hybrid vehicles, and other current or voltage sense applications.

The term ADBMS Pack Monitor refers to the ADBMS2960 and ADBMS2962. The term ADBMS Link Monitor refers to the ADBMS2961.

The ADBMS Pack Monitor measures the current flowing in and out of a battery pack by sensing the voltage drop over a shunt resistor with very low offset. It also detects overcurrent conditions by fast overcurrent ADCs with digital threshold comparators and communicates them by dedicated overcurrent alert lines with minimum delay.

Six digital outputs (GPO) supporting open-drain or push-pull mode can be used to control HV transistors to disconnect external resistor dividers. Four digital general-purpose inputs/outputs (GPIO) can also operate as an I2C/SPI controller interface to address external serial peripherals (such as EEPROM).

A total of 12 dedicated buffered high-impedance inputs (V1 to V10, VBAT1, and VBAT2) are provided for measuring voltages from external sensors or resistor dividers enabling measurement of pack voltages, temperatures, HV-Link voltages, chassis isolation, and supervision of the state of contactors and fuses. An additional eight buffered high-impedance inputs (V11 to V18) are available in certain configurations for a total of 20 inputs. The built-in serial interface of the ADBMS Pack Monitor can be configured for SPI or isolated isoSPI communication with the BMS controller. It has an additional isoSPI port, which allows connecting a daisy-chain of ADBMS Pack Monitor devices, optionally extended withADBMS6834/6836/6837 cell monitors (ADBMS cell monitors).

APPLICATIONS

* Electric and hybrid electric vehicles

* Backup battery systems

* Grid energy storage

* Battery pack current measurement

* Buffered analog inputs

* Continuous operation option

* Lossless measurement for coulomb counting

* 1 ms update rate

* ±0.1% maximum gain error

* ±1 μV maximum offset

* Redundant implementation

* Battery pack voltage measurement

* Buffered analog inputs

* Synchronous with current measurement

* Differential and single-ended mode

* Redundant implementation

* Up to 20 voltage measurement channels

* Buffered analog inputs

* On-demand operation

* Differential and single-ended mode

* Redundant implementation

* Built-in external reference

* True ratiometric measurements