ADBMS2950

RECOMMENDED FOR NEW DESIGNS

Battery Pack Monitor

Data Sheet (Rev. SpC) Product Selection Table

Part Models: 2
1ku List Price: price unavailable

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Overview

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
10 additional voltage measurement channels
- Buffered analog inputs
- On-demand operation
- Differential and single-ended mode
- Redundant implementation

Overcurrent detection
- Triple redundancy with majority voting
- PWM output options
Built-in isoSPI
- 2 Mbps isolated serial communications
- Capacitor or transformer coupled
- Daisy-chaining option
- 4-wire SPI option
General-purpose digital IO
- Six general-purpose outputs
- Dual threshold read-back of GPOs
- Four GPIOs configurable as an I²C or SPI controller
48-Lead side-solderable QFN package
AEC-Q100 qualified
ADBMS295xWFS models developed for use in ISO 26262 applications for ASIL D

The ADBMS2950 and ADBMS2952 are battery pack monitors, and the ADBMS2951 is a link monitor for electrical and hybrid vehicles, and other current or voltage sense applications. The ADBMS2950 and ADBMS2952 measure the current flowing in and out of a battery pack by sensing the voltage drop over a shunt resistor with a very low offset.

The ADBMS2950 and ADBMS2952 also detect overcurrent conditions using fast overcurrent ADCs with digital threshold comparators and communicate their results through dedicated overcurrent alert lines with minimum delay.

The ADBMS2950/ADBMS2951/ADBMS2952 feature a total of 12 internally buffered high impedance inputs for measuring voltages from external sensors or resistor dividers, enabling measurement of pack voltages, temperatures, HV-Link voltages, chassis isolation, and the supervision of the state of contactors and fuses.

Six digital outputs (GPOs) supporting open-drain or push-pull can be used to control high voltage transistors to disconnect external resistor dividers. Four digital GPIOs also allow operation as an I²C or SPI controller interface to address an external EEPROM or other serial peripherals.

The built-in serial interface of the ADBMS2950 and ADBMS2951 can be configured for SPI or isolated isoSPI communication to the host. An additional isoSPI port allows to connect a daisy-chain of the ADBMS2950 and ADBMS2951 devices; optionally extended with the ADBMS683x cell monitors. The ADBMS2952 supports SPI communication only.

Applications

Electric and hybrid electric vehicles
Backup battery systems
Grid energy storage

Part Models: 2
1ku List Price: price unavailable

Documentation

Data Sheet 1

ADBMS2950/ADBMS2951/ADBMS2952: Battery Pack Monitors Data Sheet (Rev.SpC) 07/30/2024

Request an NDA

Complete documentation for the ADBMS2950/ADBMS2951/ADBMS2952 is available upon completion of a Non-Disclosure Agreement (NDA). Send your project details, company information, and contact by email to BMS_Doc_Request@analog.com. Additional support is available from your Analog Devices local sales.

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
ADBMS2950WCCSZ	48-Lead Plastic Side Wettable QFN (7mm × 7mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADBMS2950WCCSZ-RL	48-Lead Plastic Side Wettable QFN (7mm × 7mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Sep 18, 2024 - 24_0157 ADBMS295x Data Sheet Revision
		PCN24_0157_Form Material_Report Delta Qualification Matrix Revised Datasheet Specification
ADBMS2950WCCSZ	PRODUCTION
ADBMS2950WCCSZ-RL	PRODUCTION
Jul 26, 2023 - 23_0130 Data Sheet Revision ADBMS2950/ADBMS2951/ADBMS2952
		PCN23_0130_Form Material_Report Delta Qualification Matrix Revised Datasheet Specification
ADBMS2950WCCSZ	PRODUCTION
ADBMS2950WCCSZ-RL	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Evaluation Kits

72 V to 96 V Battery Management System for Electric 2- and 3-Wheelers

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Features and Benefits

Variable 72 V to 96 V voltage range, suitable for E2W/E3W applications
ASIL-D compliant and automotive grade BMS chip
Built-in charge, pre-charge, and discharge circuitry
1.8 mV total measurement error (TME) for cell voltage monitoring
High performance cell/pack voltage and current monitoring
On-board isoSPI communication
Low Power Cell Monitoring (LPCM) capability
GPIO Controllable FET Monitoring
ADBMS6830 GPIO input ready for NTC sensors
Low Power MAX32690 MCU
UART and CAN Communication
SOC and SOH thru Enhanced Coulomb Counting Technique
E2W/E3W Basic System Behavior Modes
Embedded Application-ready (via CLI)
With GUI capable of the following measurements and fault detection:
- Cell Monitoring
- Voltage and Current Pack Monitoring
- Charge Current Monitoring
- Discharge Current Monitoring
- Temperature Monitoring
- Cell OV/UV Detection
- Cell/GPIO Open-wire Detection
- Cell Balancing

Product Details

The AD-BMSE2E3W-SL is a BMS reference design for light electric vehicles (LEVs). With a voltage range of 72 V to 96 V, this solution is suitable for electric 2-wheeler and 3-wheeler vehicles with high current capacity ranging up to 100 A.

This single-board system utilizes the best-in-class ADBMS6830 cell monitoring chip that is capable of monitoring up to 2x 16-channel. This board also features battery pack monitoring using the ADBMS2950. The ADBMS6822 dual isoSPI transceiver provides a built-in 2-wire reversible isoSPI connection, which simplifies the communication of BMS parts in a daisy chain configuration before sending the data to SPI lines in the microcontroller.

The on-board MAX32690 MCU, when loaded with the firmware, can perform BMS measurements such as cell voltage (average and filtered), and pack voltage and pack current measurement. The board also has a charge, pre-charge, and discharge mode that can be controlled by the ADBMS2950 pack monitor chip.

The AD-BMSE2E3W-SL is designed to perform either in embedded mode or using a GUI, where it calculates the battery's State of Charge (SoC) and State of Health (SoH) through enhanced coulomb counting technique.

APPLICATIONS