power delivery industrial battery pack solutions battery pack live … · 2019. 11. 19. ·...

TI Information – Selective Disclosure TI Information – Selective Disclosure

Power Delivery

Industrial Battery Pack Solutions

Nov 2019

1

TI Information – Selective Disclosure

Agenda

2

Key Industrial Battery Pack Applications

Other supports

• Battery pack – e-bike/e-scooter/LEV

• Battery pack – Telecom BBU

• Battery pack – cordless power tool

TI Hero Industrial BMS Solutions

TI Information – Selective Disclosure 3

Battery pack – e-bike/e-scooter/LEV

1. China E-bike/e-motorcycle volume: 30Mu/y.

2. China Li-ion battery pack occupies 13% in 2019. Up to 44%

in 2022.


1. China Tieta has 1.95M MACRO SITE & MICRO SITE(18ku) till end of 2018.

https://www.china-tower.com/about

2. Average number of tenants for China Tieta tower is 1.55, therefore total 3M.

Battery pack – Telecom BBU








Battery pack – cordless power tool


……

Fuel Gauge

BQ34Z100-G1

Cell6

Cell9

Cell10

Cell13

BAT+

PACK+

PACK-BAT-

BAT+

…

Cell1

Cell5

MCU

MSP430FR2155DBT

D1…N

I2C

I2C

BQ7718

BQ7718

BQ7718

BQ76200

I/O

I/O

AFE

w/CB

BQ76940

T1

ALERT

CBMOSFETs

VCC

BAT+

I/O

CSD19536KTT CSD19536KTT

*3 *3

LM5164

TLV70433

THVD1500

SN6501

Opto

TLV70450Iso_5V

Monitor/Protection/Cell-Balancing

Charge/Discharge Power Stage

Battery Management Controller

Auxiliary Power Supply

TPD2E007

ISO1042

Communication

Accurate gauging and 50uA standby current 13S 48V Li-ion Battery Pack Reference Design: TIDA-010030

Tools & Resources Board Image

• E-Bike Battery Pack, e-Scooter Battery Pack

• BBU, UPS Li-ion Battery pack, Mowing robot battery pack

• Other >=10S Battery Pack

Target Applications

• Impedance TrackTM based gauging solution: with 2% SOC accuracy @room

temperature.

• Robust and programmable protection, including:

- cell over voltage, cell under voltage, overcurrent discharge, short circuit.

- over temperature, under temperature.

• System current spec: ~9mA @operation mode, 50uA @standby, 5uA

@shipping mode

• High-side charge/discharge MOSFETs and supports pre-discharge

• Supports 100mA cell-balancing

• Add-on secondary protection

Features Benefits

• Longer runtime per each charge

• Longer storage time & idle time

• Robust systems. And hardware OV/UV/OCD/SCD

• High side charge and discharge control

• Cell balancing

• TIDA-010030 and Tools Folder

• Design Guide

• Design Files: Schematics, PCB, BOM, Gerber

• Device Datasheets:

‒ BQ34Z100-G1, BQ76940, BQ76200, BQ7718

‒ MSP430FR2155, LM5164, ISO1042, THVD1500

‒ SN6501, TLV704, CSD19536, TPD2E007

http://www.ti.com/tool/TIDA-010030




……

Fuel Gauge

BQ34Z100-G1

Cell6

Cell9

Cell10

Cell13

BAT+

PACK+

PACK-BAT-

BAT+

…

Cell1

Cell5

MCU

MSP430FR2155DBT

D1…N

I2C

I2C

BQ7718

BQ7718

BQ7718

BQ76200

I/O

I/O

AFE

w/CB

BQ76940

T1

ALERT

CBMOSFETs

VCC

BAT+

I/O


*3 *3

LM5164

TLV70433

THVD1500

SN6501

Opto

TLV70450Iso_5V

Monitor/Protection/Cell-Balancing

Charge/Discharge Power Stage

Battery Management Controller

Auxiliary Power Supply

TPD2E007

ISO1042

Communication

System Block Diagram

21 TI Parts* 7


Standby current – w/wo load equivalent capacitance

8

TIDA-010030 …

BAT+

BAT-

C0

C13

C12

C11 13S2P

Battery

+

-

Multimeter

Pack+

Pack-

1. Without load

equivalent capacitance 2. With load equivalent

capacitance

1. Without load

equivalent simulates

when the pack is

outside of the ebike;

2. With load equivalent

simulates when the

pack is inside the

ebike but no load;

Load equivalent

capacitance TIDA-010030 …

BAT+

BAT-

C0

C13

C12

C11 13S2P

Battery

+

-

Multimeter

Pack+

Pack-

13S2P LGC INR18650MH1-

3200mAh

Battery voltage: 48V

@Room temperature

49.1µA

47.7µA


bq76940REGOUT

LM5164BAT+

LDObq76200

Bq34z100-g1MCU

9

Shipping mode current consumption

0.7µA

TIDA-010030 …

BAT+

BAT-

C0

C13

C12

C11 13S2P

Battery

+

-

Multimeter

Pack+

Pack-

Shipping mode:

1. When the pack is just out of factory (1st time powered on)

2. When the pack voltage is quite low

13S2P LGC INR18650MH1-3200mAh

Ship mode voltage threshold: 3000mV for

each cell (total 39V for 13S pack)

Battery voltage: 38V

@Room temperature

1

2


SOC gauging – Constant discharge current

10

Discharge current: 1280mA(0.2C)

• 13S2P LGC INR18650MH1-3200mAh

• Constant discharge current: 1280mA (0.2C)

• @room temperature


bq34z100-g1 Multi-chemistry impedance track standalone fuel gauge

• Impedance Track™ Fuel Gauge Capacity Estimation for Li-

Ion, Polymer, LiFePO4, PbA, NiMH and NiCd

• Large Capacity Batteries Supported (>65Ahr)

• High Current Applications Supported (>32A)

• Suitable for packs 2.5V to ~65V

• Low Operating Current of <140uA, Sleep <64uA

• SHA–1 authentication

• External Thermistor Supported

• Optional Interfaces: Single wire (HDQ)/ Two-wire (I2C)

Comm.

• 14-pin TSSOP

• Very simple setup and configuration

• Accurate fuel gauging

• Independent of protection solution and cell balancing

requirements

• Capable of gauging very high series cell batteries

Features Benefits

• Energy Storage Systems

• Battery backup, UPS and wireless base stations

• Power Assist, eBike

• Cordless home appliances

• General 12–48V battery packs

Applications

11


12

Load detect & removed – with low current consumption

VPACK

ILoad

Vgs-dis

Vgs-dis

ILoad

VPACK

Load on Load off 1

2 Turn on charge/discharge

MOSFET

700ms

1

2 Turn off charge/discharge

MOSFET

Load on detection Load removed

450ms


13

Charger detect & removed – with low current consumption

Charger attached

VBAT

VPACK

ILoad

ILoad

Vgs-cha Vgs-cha VPACK

VBAT

Charger removed

1

2 Turn on charge/discharge

MOSFET

Charger attached detection Charger removed

1

2 Turn off charge/discharge

MOSFET

1280ms

450ms


14

Over current discharge protection

bq76940 setting: 11A OCD & 320ms delay

Use DC Source in parallel with a 820µF eCAP

to simulate battery

@Room temperature

bq76940 setting: 56A SCD & 70µs delay

Use DC Source in parallel with a 820µF eCAP to simulate battery

Short PACK+ and PACK- with a switch

@room temperature


LM5164 100V, 1A Low IQ Synchronous Buck Converter

Applications

Features Benefits

• Appliances, power/garden tools, multi-cell battery packs

• Motor drives, e-bikes, drones, telecom

• Wide input voltage range from 6V to 100V

• Low quiescent current – 3uA Shutdown IQ minimizes battery drain

– 10uA Sleep IQ extends battery life when idle

• Integrated low on-resistance FETs

– HS: 0.75Ω, LS: 0.33Ω

• Near constant frequency adjustable to 1MHz

• Low minimum Ton and Toff of 50ns

• Peak & valley current limit prevents excessive heat

• Power Good output

• Internal soft-start and bootstrap diode

• Precision Enable / UVLO

• Thermal shutdown

• SOIC-8 package with PowerPAD™

• Small solution size with low external component count

• Easy to use, fast transient response with no external

compensation using Constant On Time (COT) control

• High efficiency due to low Iq and low Rds-on

• High step-down conversion and up to 99% duty cycle due

to low minimum Ton & Toff

15


bq769x0 Family Cell Balancing Monitoring Family for Li-ion and Phosphate Applications

• Supports 3S to 15S battery packs

• bq769200x: 3 to 5 series cells



• 14-bit ADC measures voltage and temperature

• 16-bit precision coulomb counter integrating ADC tracks passed charge

• Built-in hardware voltage and current fault detection, dynamically

adjustable by µC (OVP, UVP, OCD, SCD)

• 2.5V or 3.3V LDO output

• Low-side CHG and DSG NFET drive

• Cell balancing drivers

• 0.6µA typical Iq shutdown

• I2C with CRC option

• Pairs with bq76200 and bq78350-R1 CEDV battery fuel gauge manager for

turnkey solution

• 20p/30p/44p TSSOP

• Purely digital interface with internal ADCs

• Uniform pinouts across all 3 sizes enables reduced

development time and design reuse of small to

large batteries

• Random cell count connection tolerant to

match device to application size

• All devices operate the same, allowing for

deployment of the bq769x0 family across all pack

designs from small to large

Features Benefits

• Light Electric Vehicles (eBikes, eScooters, Pedelec)

• Power tools, garden tools, cordless household appliances

• Energy Storage Systems (ESS) and Battery Backup (BBU)

Applications

16


bq76200 100V High-Side N-Channel FET Driver for Battery Pack Charge/Discharge

• Wide operating supply range with 100V abs max

• Independent charge and discharge N-channel FET drive with supports for

series or parallel power paths

• Integrated charge pump with adjustable external switching capacitor

accommodates varying FET loads (10-100nF)

• Fast turn on/off of FETs and scalable to handle small to large FET loads

• Low power consumption (40 µA typical, 6 µA shutdown)

• Bonus P-channel FET drive supports current-limited charging of severely

depleted battery packs or pre-discharging large discharge load (i.e. motor)

• Pack-side high voltage switch to support monitoring of pack+ voltage

• Simple, flexible interface with individual ps to enable charge pump, charge, discharge,

precharge, and pack monitor

• 16p TSSOP (4.4 x 5.0 x 1.2 mm)

• Enables system to measure PACK+ voltage even when

power FETs are off, to determine whether battery is

connected to charger, load or nothing

• Quickly respond to battery faults such as discharge

short-circuit (SCD)

• Adeptly handles battery packs ranging from 18V up to 48V

with plenty of margin

• Minimal BOM overhead and integrated charge pump

reduces board size

Features Benefits

• eBikes, eScooters and eMotorcycles

• Power tools, garden tools, cordless household appliances

• Uninterruptable Power Supplies (UPS)

• Energy Storage Systems (ESS) and Battery Backup (BBU)

Applications

17


High-side vs Low-side Gate Drivers

18

Battery

Management Communication

PACK+

PACK-

BATT+

BATT- Sense

Resistor

Battery

Management

PACK+

PACK-

BATT+

BATT- Sense

Resistor

Communication

Low-Side High-Side BATT- and PACK- only connected when FETs closed; no

shared ground reference once FETs open

Communication between battery pack and system not

possible once FETs open unless expensive, demanding

power isolation or opto-coupling techniques employed

May cause leakage or component damage to battery

pack

BATT- and PACK- always connected

Battery pack and system always able to

communicate since ground reference always shared


……

PACK+

PACK-

BAT-

BAT+

…

BQ7718

BQ7718

BQ7718

Vout+

-

VBAT

+

-

19

Secondary protection – Over voltage

1.1µA VBAT

Vout

bq771800: 4.3V & 4s delay

Use DC Source to simulate battery

@room temperature

t≈3.7s

PIN input leakage current at 4V (uA)


bq7718xy 2-5S Overvoltage Protector with Internal Delay Timer

• Fixed overvoltage (OV) and recovery hysteresis thresholds

• High-accuracy OVP: 10mV

• Internal delay timer

• Low power consumption (typ 1µA)

• Low leakage current per cell input (≤ 100nA)

• May be stacked with minor external BOM adder

• 8PIN QFN (3.0 x 4.0 x 0.75)

• Very simple and low cost

• Ultra low power

• No customer programming needed

Features Benefits

• Power Tools, Garden Tools

• Notebook PC

• 12V, 24V, 36V, 48V Li-Ion Batteries

Applications

• OV Threshold: 3.85 – 4.65V, 25mV steps

• OV Hysteresis: 0, 50, 250, 300mV

• Output Delay: 1, 3, 4, 5 seconds

• Output Drive: CMOS Active High, NCH Open Drain Active Low

• Check TI.com for released options; contact TI if custom version

required

Configuration Options

20


21

ISO1042/Q1: EMC optimized isolated CAN Transceiver w/ 70V Bus Fault Protection, CAN FD

Features

Applications

Benefits

• Grid Infrastructure

• Motor Control

• Industrial Automation

• HEV/EV Powertrain

• Integrated solution enables smaller BOM, reduced board space and helps with

easier system certification.

• Higher speed, faster loop times allow for increased communication throughput

for higher bandwidth applications.

• Supports 48V systems and protection against short circuits to large power

supplies.

• Meets industry standards to ensure reliable operation in safety critical

applications.

• Maintains signal integrity in noisy environments

• Allows use of the device with 1.8V, 2.5V, 3.3V, 5V micro-controllers.

• Pin-to-pin with TJF1052IT, TJA1052IT (DW package) enables ease of upgrade

(with improved performance)

• Space saving with DWV package

• Isolated Power Supplies

• Elevators

• Drones

• ISO 11898-2 compliant

• Supports CAN Classic (1Mbps) and FD (Flexible Data Rate) up to 5 Mbps

• Fast Loop Times: 152 ns Typical, 215ns Max (for VCC1>2.5V)

• DC Bus-Fault Protection: ± 70V

• IEC ESD tolerance on Bus Pins: ± 8kV

• Highest CMTI: 85kV/us (min)

• Wider Common mode range: ± 30V

• Ideal Passive – High impedance I/Os when unpowered

• TXD dominant timeout protection

• Immunity and Certifications

• 10 kVpk Surge per VDE

• 5 kVrms Isolation rating per UL1577

• 7.07 kVpk VIOTM (transient) and 1500 Vpk VIORM (working voltage)

per VDE0884-10

• Power and Package

• VCC1 Voltage Range: 1.71V to 5.5V

• VCC2 Voltage Range: 4.5V-5.5V

• 16DW and 8DWV packages (> 8mm clearance and creepage)

• Extended Temp: -40°C to 125°C


Summary

22

2% SOC accuracy

50µA standby consumption

5µA ship mode consumption

Robust protections


20-Series Battery Management Module Reference Design: TIDA-01093

Tools & Resources Board Image

• E-Bike Battery Pack, e-Scooter Battery Pack

• Li-ion Battery UPS and ESS

• Power and Garden Tool

Target Applications

• Support 16-Series to 20-Series Cell Application

• All independent hardware protection function inherited from bq76930

• Charger insertion detection and load removal detectable

• Isolated differentiated CAN PHY for communication with host system

• Support up to 128k Buad rate UART communication with external host

• Supports 50mA cell-balancing

• Programmable and independent hardware protection

• - cell over voltage, cell under voltage, overcurrent discharge, short circuit.


• Add-on secondary protection

Features Benefits

• Robust protections and hardware OV/OCD/SCD/UV

• Low normal working current consumption

• Isolated Low Cost CAN Lite communication

• Cell balancing


• Design Guide

• Design Files: Schematics, PCB, BOM, Gerber


‒ BQ76930

‒ MSP430G2955, LM25018

‒ ISO1541, ISO1050


• Integrated SiO2 Dielectric Capacitor • Uni & Bi directional Clock Options • Fast Mode Plus (1 MHz) Operation

• Immunity and Certifications • 2.5kVrms Isolation Rating (UL 1577) • 4kVpk Transient (DIN EIN 60747-5-2) • 560Vpk Working Voltage Isolation

• CSA

• ±50kV/μs Typical Transient Immunity

• 4kV ESD Protection on All Pins

• Power and Package • Extended Temp Range -40 to 125C • 8-pin Narrow-body SOIC package

Applications • Isolated I2C, SMBus, PMBus Interfaces

• Open-drain Network Interfaces

• Power Over Ethernet

• Power Supplies

• Battery Management

• Motor Control Systems

• Level Shifting

Features Benefits

ISO1540 / ISO1541 Low-Power Bidirectional I2C Isolators

• Reduces Cost and Board Space

• Single & Multi-Master Applications

• Usable in Vast Majority of Applications

• Ease of Use

• Better reliability, immunity than competition

• Suitable for harsh Industrial Environments

• Industry Standard Footprint. Compatible with

ADuM1250/1, Si8400/1 & Si8600/2

ISO1540

1

2

3

4 5

6

7

8

GND2

SCL1

VCC2VCC1

SCL2

GND1

SDA1 SDA2

Iso

latio

n

ISO1541

1

2

3

4 5

6

7

8

GND2

SCL1

VCC2VCC1

SCL2

GND1

SDA1 SDA2

Iso

latio

n


TIDA-01093 Test Graphs

Bottom bq76930 OV Protection Test

CHG FET

Gate

Upper CHG

Signal

CHG FET

Gate

Bottom

CHG Signal

Upper bq76930 OV Protection Test



DSG FET

Gate

Bottom DSG

Signal

Bottom bq76930 UV Protection Test Upper bq76930 UV Protection Test

DSG FET

Gate

Upper DSG

Signal



Charger detect test Load removal test with BAT=60V

Load

removed

Load removal

detected

Charger

attached

Enter normal

charging


Summary

Support up to 20S cell series applications.

Simple and reliable FETs control circuit.

Adjustable DSG FETs turn off delay, ranges from

<1uS up

High impedance load removal detect circuit.

Reliable Charger detect circuit.


Tools & Resources

Target Applications

Features

• Cost competitive 16S-17S Li-ion/LiFePO4 battery pack solution.

• High cell voltage sensing accuracy:

• ±5mV @25°C.

• ±10mV @0°C-50°C.

• Robust and programmable protection, including:

- cell over voltage, cell under voltage, overcurrent discharge, short circuit.


• System current spec:

• 10mA @operation mode

• 100uA @standby, 5uA @ship mode

• Supports 100mA cell-balancing.

• Battery pack – e-bike/e-scooter/LEV

• Other industrial battery pack (>=10S)

Benefits

• Low cost solution for high cell applications.

• Longer storage time & idle time.

• Robust systems.

• High side charge and discharge control.

• Effective cell balancing

Cost competitive 16S-17S telecom BBU & e-Motor battery pack reference design: TIDA-010074


• Design Files: Design Guide, Schematics, BOM


‒ bq76940, LM2904B, LM5164, bq76200,

MSP430FR2155, THVD1500

Board Image

……

Cell6

Cell10

Cell11

Cell15

BAT+

PACK+

PACK-BAT-

BAT+

…

Cell1

Cell5

MCU

MSP430FR2155DBT

D1…N

I2C

BQ76200

I/O

I/O

AFE

w/CB

BQ76940

T1

ALERT

VCC

I/O


*3 *3

LM5164

TLV70433

THVD1500

SN6501

Opto

TLV70450Iso_5V

TPD2E007

CBMOSFETs

Cell16

Cell17-

+

V16_ADC

LM2904B

-

+

V17_ADC

LM2904B

V1

7_

AD

C

V1

6_

AD

C

Monitor/protection/

cell-balancing

Auxiliary power

supply

Communication

Battery management

controller

Charge/Discharge

Power Stage



17 TI Parts* 31

……

Cell6

Cell10

Cell11

Cell15

BAT+

PACK+

PACK-BAT-

BAT+

…

Cell1

Cell5

MCU

MSP430FR2155DBT

D1…N

I2C

BQ76200

I/O

I/O

AFE

w/CB

BQ76940

T1

ALERT

VCC

I/O


*3 *3

LM5164

TLV70433

THVD1500

SN6501

Opto

TLV70450Iso_5V

TPD2E007

CBMOSFETs

Cell16

Cell17-

+

V16_ADC

LM2904B

-

+

V17_ADC

LM2904B

V1

7_

AD

C

V1

6_

AD

C

Monitor/protection/

cell-balancing

Auxiliary power

supply

Battery management

controller

Charge/Discharge

Power Stage


32

Voltage accuracy - 16th & 17th cells

Max error < ±2mV @25°C

𝑂𝑓𝑓𝑠𝑒𝑡 𝑥 =𝑉1

𝐴𝐷𝐶𝐶𝑒𝑙𝑙𝑥_2𝐴𝐷𝐶𝐶𝑒𝑙𝑙𝑥_1

− 𝑉2

𝐴𝐷𝐶𝐶𝑒𝑙𝑙𝑥_2𝐴𝐷𝐶𝐶𝑒𝑙𝑙𝑥_1

− 1

𝐺𝑎𝑖𝑛 𝑥 =(𝑉2 − 𝑉1)

𝐴𝐷𝐶𝐶𝑒𝑙𝑙𝑥_2 − 𝐴𝐷𝐶𝐶𝑒𝑙𝑙𝑥_1

𝑥 = (16, 17)

Connect V1 to Cell16 & Cell17

(2000mV<V1<4000mV) 1

Read ADC data ADCCell16_1, ADCCell17_1 2

Connect V2 to Cell16 & Cell17

(2000mV<V2<4000mV, V1 ≠ V2) 3

Read ADC data ADCCell16_2, ADCCell17_2 4

16th 17th voltage range: 1500mV – 4300mV

Resisters tolerance: 1%

MSP430FR2155 ADC: 12-bit

Room temperature: 25°C


33

Voltage accuracy - 16th & 17th cells

Max error < ±10mV from 0°C-50°C


Resisters tolerance: 1%, 50ppm


Temperature: 0°C


Resisters tolerance: 1%, 50ppm


Temperature: 50°C


LM358B | LM2904B 1.2MHz | low offset | Extended Temp Range | 36V Bipolar Amplifier

• Power Supply Units

• AC Inverter & VF Drives

• Industrial Motor Control

• LED Current Sensing

• Automotive Powertrain

• Body and Lighting

• Wide supply voltage allows for a versatile range of low

and high voltage applications

• Input fail-safe feature enables robust system design for

rugged environments

• Integrated EMI filter offers immunity against EMI/ RFI

interference

• Space saving TSOT package helps to miniaturize the

existing designs using the popular LM358 functions

• Supply voltage 3.0V to 36 V

• Input offset voltage 3.0 mV (Max@ 25ᵒC)

• Bandwidth 1.2 MHz

• Input fail-safe Up to 36 V

• Quiescent current 0.3 mA (typ)

• Robust ESD 2kV (HBM)

• Circuit topology Bipolar

• Integrated EMI filter

• Available Packages: SOIC, VSSOP, TSSOP, and

TSOT

LM358 LM358B LM2904 LM2904B

Supply (V) 3V-32V 3V-36V 3V-26V 3V-36V

Temp Range 0 to 70C -40 to +85C -40 to +125C -40 to +125C

VOS (max) 7mV 3mV 7mV 3mV

IQ / ch (typ) 350µA 300µA 350µA 300µA

EMI Filters ✔ ✔

ESD (HBM) 500V 2kV 500V 2kV

Features Benefits

Applications

Available Package Options: SOIC (D), WSON (DSG), SOT-23-THIN [TSOT] (DDF), VSSOP (DGK), and TSSOP (PW)


Summary

35

16th & 17th Cell voltage sensing accuracy

• ±5mV 25°C;

• ±10mV 0°C-50°C

100µA standby consumption

5µA ship mode consumption

Robust protections


TIDA-00792 Tools

Folder

- Design Guide

- Design Files:

Schematics, BOM,

Gerbers, etc.

• Device

Datasheets: ‒ bq76940

‒ bq78350-R1

‒ bq76200

‒ CSD19536KTT

• Cell based monitoring and protection for battery.

• High side switching of N-channel power FETs for ground

referenced communication even when protected

• Gauge for battery management configuration using parameters

rather than code development

• Consolidated schematic for easy reference

• 12 to 15 cell Li-ion and phosphate battery management system

• High side protection switching using N-channel MOSFETs

• Cell balancing for extended battery life

• Gas gauging for estimation of system run time

• This sub-system circuit design is tested and includes GUI

and Getting Started guide

Features Benefits

Tools & Resources

• Battery pack – vacuum cleaner/robots.

• Other industrial battery pack (>=10s).

• Other industrial battery pack (1s-9s).

Applications

36

Multi-Cell 36-48V Battery Management System Reference Design TIDA-00792





http://www.ti.com/product/BQ76940

http://www.ti.com/product/bq78350-R1



http://www.ti.com/product/bq76200

http://www.ti.com/product/CSD19536KTT


bq78350-R1 Companion Fuel Gauge for bq769xx family of front end monitors

Compensated EDV coulomb counting based gauging algorithm

Integrated voltage, current and temperature protections

Voltage–based cell balancing algorithm

Supports batteries up to 320 Ah

Supports charge/discharge currents to 320 A

State of Health indication

Lifetime data logging

LCD or LED display support (3-5 segment)

Low–power storage mode ICC of 8 µA

SHA–1 authentication

SMBus communication interface

30–TSSOP (DBT)

Supports high cell/high current/large capacity battery packs

Enables fastest time to market with NO customer algorithm or F/W

development needed

Fully compatible with bq76920, 930, 940 for 3-15s packs Extremely simple setup and configuration for CEDV

Chemistry parameters can be self-tuned by customer without needing TI’s

support

Improves safety with comprehensive protection Cell balancing maximizes run time and cycle life

Visual display of SOC with LED/LCD

Lifetime data supports warranty claim verification

battery replacement decisions facilitated by SOH indication

TSSOP package suitable for industrial application

Features Benefits

Light electric vehicles (LEV): eBikes, eScooters, Pedelec and pedal–

assist bicycles

Cordless household appliances and power tools

Battery backup/UPS systems

Wireless base station backup

Telecom Power systems

General 12–48V battery packs

Applications

37


Undervoltage protection Overcurrent protection

Test results of TIDA-00792



Short circuit protection Recovery attempt from Short circuit


SoC test @ charging SoC test @ discharging



Cost competitive 3S-7S battery pack solution based on bq76925+GPAMP

Tools & Resources

• User Guide

• Design Files:

Target Applications


• Battery pack – cordless power tool.

• Other industrial battery pack (>=10s).


Features

For 3S-7S Li-Ion or LiFePO4 Battery.

Monitors each cell voltages, pack current, pack temperatures through

analog signals.

Low quiescence current, ultra-low power state for shipment.

Hardware over current Protection.

Cost competitive solution with discrete circuit.

Passive cell balancing.

Separated charge and discharge circuit and protection against short-

circuit for both discharge and charge ports.

Benefits

Analog Frond end + GPAMP architecture to save system

cost.

AFE+MCU architecture to monitor all critical specs.

Advanced balancing algorithms maximize battery life cycle and

capacity due optimized cell balancing scheme

Comprehensive Protections ensure safely using.

A good fit for 3s-7s battery pack applications.

41

……

Cell3

Cell7

PACK-

PACK+

BAT-

BAT+

Cell1

Cell2

MCU

MSP430

D1…N

Vref

ADC

AFE

BQ76925

VREF

VCOUT

ESD

CHA-

UART

Drive circuit

GPAMPADC

Cell6

I2C

Drive circuit

ICOUTADC

http://www.ti.com/lit/an/slua707/slua707.pdf

‒ BQ76925

‒ LM358B

‒ MSP430FR2155

‒ TPD2E007


Block diagram,

Schematics, BOM,

and more

http://www.ti.com/lit/an/slua707/slua707.pdf


Highly integrated, 2s-7s Battery gauge solution

Tools & Resources

• User Guide

• Design Files:

Schematics, BOM,

Software, Hardware

Board, and more

• Device Datasheets: ‒ BQ40Z80

‒ BQ7718

Target Applications


• Battery pack – cordless power tool.


Features

Highly integrated 2S-7S battery gauging solution.

Accurate SoC calculation with Impedance TrackTM algorithm.

Supports internal and external cell balancing.

High-side N channel MOSFET control and supports pre-

charge and pre-discharge functions.

Comprehensive Protection features include:

Cell over and under voltage

Over current and short circuit in charge and discharge

Charge and pre-charge timeout

Over and under temperature

Benefits


Highly integrated solution to save board size and

reduce complexity.

High SoC accuracy.


Advanced balancing maximize battery life cycle and

capacity due optimized cell balancing scheme.

43

…

Cell5

Cell7

PACK+

BAT-

BAT+

Cell1

Cell4

BQ40Z80

PACK-

SMBUS BQ7718

…

BQ7718


bq40z80 2S – 7S Battery Gas Gauge with Protector

• Battery Manager with 2-Series to 7-Series Capability

• Advanced Impedance Track Gauging with JEITA Charge Control

and Cell Balancing During Charge or at Rest

• Suitable for Li-Ion, LiFePO4 and NiXX Chemistries

• Integrated Safety Protector with High-Side NMOS FET Drivers

• Voltage, Current, Temperature, Cell Imbalance

• LED Support (up to 6)

• Pre-charge and Pre-discharge Modes Included

• Integrated Flash Memory and Lifetime/Blackbox Support

• Elliptic Curve Cryptography (ECC) Authentication

• Precision Analog Front End with Dual ADCs

– High-Resolution, 16-Bit Coulomb Counter

– 15-Bit Delta-Sigma ADC with Multiplexer

– Support for Simultaneous CC and ADC

• Works with 1.8V to 5V I/O Systems

• QFN 32pin Package (4mm x 4 mm x 0.9mm)

• High gauging accuracy & multiple complex charging profile

support

• Provides comprehensive protection for multi-cell safety

• Continuous cell balancing ensures maximum battery capacity is

available at all times

• Lifetime/Blackbox supports analysis of returned battery packs

• Anti–counterfeiting

• Visual display of SOC with LED indication

Applications • UPS, Backup, and Energy Storage Systems

• Cordless Appliances

• Non-Military Drones

• Portable Robotics and Garden Tools

Features Benefits

Typical Application Schematic

44


1s-4s Cell Li-Ion Battery Pack Manager Reference Design: TIDA-00883

Tools & Resources

• User Guide

• Design Files:

Schematics, BOM,

Software, Hardware

Board, and more

• Device Datasheets: ‒ BQ40Z50-R2

‒ BQ2961

Target Applications



Features

Fully Integrated gauge, protector and charger to support 1 to 4-

Series Li-Ion or Li-Polymer cells.

Secondary Level Protector provides Over Voltage Protection.

Impedance Track based SoC calculation.

Integrated SHA-1 Authentication.

High-side N channel MOSFET drive and supports pre-charge

function.

Directly LED support and SMBUS communication with host.

Benefits


Highly integrated solution to save board size and reduce

complexity.

High SoC accuracy.



capacity due optimized cell balancing scheme.

45

Cell3

Cell4

PACK+

BAT-

BAT+

Cell1

Cell2

PACK-

SMBUS

BQ2961BQ40Z50-R2


• Notebook/Netbook PCs

• Medical and Test Equipment

• Portable robotics

• Portable Instruments

• Drones

• Cordless household

bq40Z50-R2 1S – 4S SBS 1.1–Compliant Gas Gauge and Protector

• Integrated AFE Safety Protector

• Programmable

• Voltage, Current, Temperature, Cell Imbalance

• Advanced IT gauging with JEITA & additional temp and

current sub–ranges & cell balancing at rest or while charging

• Turbo Mode Data Support

• Black box recorder

• High side N–channel FET drive

• Integrated 1.8v LDO

• SHA–1 Authentication

• LED (up to 5) support option (bq40z50)

• QFN 32pin Package 4mm x 4mm x 0.9mm

Features Benefits

Applications

46

• High gauging accuracy & multiple complex charging profile

• support

• Provides comprehensive protection for multi-cell safety

• Continuous cell balancing ensures maximum battery capacity is

available at all times

• Turbo mode reports maximum power available at any time

• Lifetime/Blackbox supports analysis of returned battery packs

• Reduce BOM count/Lower BOM cost

• Anti–counterfeiting

• Visual display of SOC with LED indication


1 Series, 2 Series, 3 Series, and 4 Series Li-Ion Battery Pack Solution

Tools & Resources

• User Guide

• Design Files:

Schematics, BOM,

Software, Hardware

Board, and more

• Device Datasheets: ‒ BQ4050

‒ BQ2961

Target Applications



Features

Fully Integrated gauge, protector and charger to support 1 to 4-

Series Li-Ion or Li-Polymer cells.

Secondary Level Protector provides Over Voltage Protection.

CEDV based SoC calculation.

Integrated SHA-1 Authentication.

High-side N channel MOSFET drive and supports pre-charge

function.

Directly LED support and SMBUS communication with host.

Benefits


Highly integrated solution to save board size and reduce

complexity.

High SoC accuracy.



capacity due optimized cell balancing scheme. Cost competitive solution.

47

Cell3

Cell4

PACK+

BAT-

BAT+

Cell1

Cell2

PACK-

SMBUS

BQ2961BQ4050


bq4050 1S – 4S CEDV Fuel Gauge for Li-Ion Packs

48

• High-Side Protection N-CH FET Drive Allows Serial Bus

Communication During Fault Conditions

• Cell Balancing with Internal Bypass Optimizes Battery Health

• Diagnostic Lifetime Data Monitor and Black Box Recorder for

Failure Analysis

• Full Array of Programmable Protection Features Voltage,

Current, Temperature

• JEITA Charge Algorithms Support Smart Charging

• Analog Front End with Two Independent ADCs

• Simultaneous Current and Voltage Sampling

• High-Accuracy Coulomb Counter with Input Offset Error < 1

μV (Typical)

• Supports Battery Trip Point (BTP) Function for Windows®

Integration

• LED Display for State of Charge and Battery Status Indication

• 100-KHz SMBus v1.1 Communications Interface for Programming

and Data Access with Alternate 400-KHz Mode

• SHA-1 Authentication

• Compact 32-pin VQFN Package (RSM)

Applications • Cordless household

• Medical and Test Equipment

• Portable Instruments

Features


1 to 2s I2C Li-Ion Battery Pack Manager Reference Design TIDA-00895

Tools & Resources

• User Guide

• Design Files:

Target Applications

• Other industrial battery pack (1s-9s)

Features

Fully Integrated gauge, protector to support 1 to 2-

Series Li-Ion or Li-Polymer cells

2nd Level Protector provides Over Voltage Protection

Impedance Track Technology

Integrated SHA-1 Authentication

This circuit design is tested and includes orderable EVM,

User's Guide, and evaluation software

Benefits

Robust system with full protections against OV, UV, OCD,

SCD and 2ed level OV.

High side N-channel MOSFET control gives higher reliability and

safety.

Easy to design solution.



49

‒ BQ28Z610

‒ BQ2945


Hardware board,

Block diagram,

Schematics, BOM,

and more

Cell2

PACK+

BAT-

BAT+

Cell1

PACK-

I2C/

SMBUS

BQ2945BQ28Z610


50


51


52


53

• Supports up to 20S battery packs thru SimpleStack stacking interface.

• Low power consumption.

• Numerous protection features:

• Overvoltage (OV) and Undervoltage (UV)

• 2 levels Discharge overcurrent & discharge short circuit (SCD)

• Over-temperature during charging and discharging • Under-temperature during charging and discharging

• Open wire cell disconnection

• Built-in self-test function for high reliability

• Support passive cell balancing (bq77915)

• TI-programmed (EEPROM) – contact TI for specific configurations

• 20-TSSOP (PW)

• Simple to use

• Cost-effective for 3S to 20S+ packs due to stackable architecture

• Extract maximum battery capacity by charging higher thanks to great

overvoltage accuracy and wider temperature protections in discharge

• Extends storage time thanks to low ICC

• Reduced customer production time due to TI programmed EEPROM

Features Benefits

• Battery pack – cordless power tool

• Battery pack – vacuum cleaner/robots • Battery pack – e-bike/e-scooter/LEV

Applications

…

Cell6

Cell10

BAT-

BAT+

Cell1

Cell5…

PACK+

BQ77905/

BQ77915

PACK-

BQ77905/

BQ77915

BQ77905/

BQ77915

…

Cell11

Cell15

Tools & Resources

• User Guide

• Design Files:

http://www.ti.com/lit/an/slua774a/slua774a.pdf

‒ BQ77905

‒ BQ77915


Block diagram, Schematics,

BOM, and more

3s-15s pure protection solution with stacked bq779x5

http://www.ti.com/lit/an/slua774a/slua774a.pdf


bq77905xy Advanced Stackable Protector with Ultra Low Power

54

• bq77905 protects 3-5S cells per device

• Supports up to 20S battery packs thru SimpleStack stacking

interface

• Low power consumption (6 µA typical, 0.5 µA shutdown)



• Discharge overcurrent – 2 levels (OCD1 & OCD2)

• Discharge short circuit (SCD)

• Over-temperature during charging (OT-C) and discharging (OT-

D)

• Under-temperature during charging (UT-C) and discharging (UT-

D)




• 20-TSSOP (PW)

• Simple to use


• Extract maximum battery capacity by charging higher thanks to great

overvoltage accuracy and wider temperature protections in discharge

• Extends storage time thanks to low ICC


Features Benefits

• Power tools and garden tools

• Handheld vacuum cleaner

• Low-end eBike

Applications

Typical 5-cell Application


• 3-5S cells per device

• Supports from 3S to 20S (or more) battery packs through Stacking

• Low power consumption (8 µA typ. in normal operation, 2 µA typ. in

hibernate)

• Autonomous smart cell balancing



• Charge overcurrent (OCC)

• Discharge overcurrent – 2 levels (OCD1 & OCD2)

• Discharge short circuit (SCD)

• Over-temperature during charging (OT-C) and discharging (OT-D)

• Under-temperature during charging (UT-C) and discharging (UT-D)


• Programmable overcurrent delay



• 24-pin TSSOP Package

• Simple to use


• Extract maximum battery capacity by charging higher thanks to great overvoltage

accuracy and wider temperature protections in charge and discharge and by featuring

smart cell balancing scheme

• Extends storage time with low quiescent current by enabling Hibernate Mode


Features Benefits

• Power tools and garden tools

• Handheld vacuum/robotic cleaner/Hoverboard

• Low-end eBike

Applications

Typical 5-cell Application (Internal Cell Balancing)

bq77915

AVDD

VC5

VC2

VC1

DSG

VC0

VDD

VC4

VC3

SRP

CIN

RIN

CIN

RIN

CIN

RIN

CIN

RIN

CIN

RIN

RSNS

CVDD

RVDD

CVDD

RGS

PACK+

SRN

RDSG

VSS

CIN

RIN

CTRD

TS

LD

CHG

CTRC

CCFG

VTB

CBO

CBI

RGS

PACK-

RLD

RTS

RTS_PU

PRES

RCHG

PRES

ROCD

OCDP

LPWR

RCBI

55

bq77915xy Advanced Stackable Protector with Cell Balancing and Hibernate Mode


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Reference

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