TIDA-010030

Accurate gauging and 50-μA standby current, 13-S, 48-V li-ion battery pack reference design

TIDA-010030

Design files

Overview

This reference design is a low standby and ship mode current consumption and high SOC gauging accuracy 13S, 48-V Li-ion battery pack design. It monitors each cell voltage, pack current and temperature with high accuracy and protects the Li-ion battery pack against overvoltage, undervoltage, over temperature and over current situations. The SOC gauging, based on bq34z100-g1, takes advantage of an impedance tracking algorithm and achieves as high as 2% accuracy at room temperature. Through a well-designed auxiliary power supply strategy and high efficiency, low quiescent current DC-DC converter LM5164, this design achieves 50-μA stand-by and 5-μA ship mode consumption, saving more energy and allowing longer shipping time and idle time. Also, this design supports a well running firmware, which helps to decrease product research time.

Features
  • 2% battery pack SOC accuracy at room temperature
  • 50-μA current consumption when in standby mode
  • 15-μA current consumption when in shipping mode
  • Robust and programmable protection, including: cell over voltage, cell under voltage, overcurrent discharge, short circuit, overtemperature and undertemperature
  • Support 100-mA cell balancing
  • High-side charging and discharging MOSFETs and support pre-discharge function

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUEG7B.PDF (7322 K)

Reference design overview and verified performance test data

TIDRY27B.ZIP (697 K)

Detailed schematic diagram for design layout and components

TIDRY28.ZIP (345 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRY29.ZIP (317 K)

Detailed overview of design layout for component placement

TIDRY31B.ZIP (4151 K)

Files used for 3D models or 2D drawings of IC components

TIDCF37A.ZIP (1423 K)

Design file that contains information on physical board layer of design PCB

TIDRY30.ZIP (1275 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Battery fuel gauges

BQ34Z100-G1Multi-chemistry Impedance Track™ standalone fuel gauge | battery gas gauge

Data sheet document-pdfAcrobat PDF open-in-new HTML
Battery monitors & balancers

BQ76200High-side n-channel FET driver

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Battery monitors & balancers

BQ769409 to 15-series cell li-ion and li-phosphate battery monitor (bq76940 family)

Data sheet document-pdfAcrobat PDF open-in-new HTML
Battery protectors

BQ7718Family 2-5S Overvoltage Protector with Internal Delay Timer

Data sheet document-pdfAcrobat PDF open-in-new HTML
Buck converters (integrated switch)

LM51646-V to 100-V input, 1-A synchronous buck DC-DC converter with ultra-low IQ

Data sheet document-pdfAcrobat PDF open-in-new HTML
ESD & surge protection ICs

TPD2E007Dual 15-pF, ±13-V, ±8-kV ESD protection diode for AC Signal Data Interfaces

Data sheet document-pdfAcrobat PDF open-in-new HTML
Isolated CAN transceivers

ISO1042Isolated CAN transceiver with 70-V bus fault protection & flexible data rate

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Linear & low-dropout (LDO) regulators

TLV704150-mA, 24-V, ultra-low-IQ, low-dropout voltage regulator

Data sheet document-pdfAcrobat PDF open-in-new HTML
MSP430 microcontrollers

MSP430FR215524 MHz MCU with 32KB FRAM, 4KB SRAM, comparator, 12-bit ADC, UART/SPI/I2C, timer

Data sheet document-pdfAcrobat PDF open-in-new HTML
N-channel MOSFETs

CSD19536KTT100-V, N channel NexFET™ power MOSFET, single D2PAK, 2.4 mOhm

Data sheet document-pdfAcrobat PDF open-in-new HTML
RS-485 & RS-422 transceivers

THVD15005-V RS-485 transceiver up to 500 kbps with ±8-kV IEC ESD protection

Data sheet document-pdfAcrobat PDF open-in-new HTML
Transformer drivers

SN6501Low-noise, 350-mA, 410-kHz transformer driver for isolated power supplies

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Design guide Accurate gauging & 50uA standby current 13S 48V Li-ion battery pack ref design (Rev. B) Feb. 26, 2019
Technical article Fast and furious: designing longer-lasting 16S-17S Li-ion battery packs for e-motorcycles Nov. 21, 2019
Technical article Power to the pedal: Achieving longer-lasting 13S, 48-V lithium-ion battery packs for e-bikes and e-scooters Mar. 07, 2019

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