Automotive

Leading technologies for automotive applications

Contents

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2

Our customers and productsTechnologies
12V battery management systems
HV battery management systems
Motor control
Charging systems
Contact

Leading the world inelectrical measurement
A leading company in electricalmeasurement, LEM engineers
the best solutions for energy
and mobility, ensuring that
our customers’ systems are
optimized, reliable and safe.
Our 1,500 employees in morethan 15 countries transform
technology potential into
powerful answers. We develop
and recruit the best global
talents, working at the forefrontof mega trends such as
renewable energy, mobility,
automation and digitization.
With innovative electricalsolutions, we are helping
our customers and society
accelerate the transition
to a sustainable future.

3

Automotive

Our customers and products
LEM partners with leading vehicle
manufacturers and Tier 1 suppliers on
powertrain electrification and autonomous
driving applications by providing sensors thatmeet high standards of functional safety (ASIL).
LEM offers its customers a broad portfolio of
products tailored to a wide range of technicalrequirements. LEM also prides itself on
providing leading engineering services forcustomer-specific solutions.

Battery management
For start-stop vehicle architectures, we offer intelligent battery sensors
combining a unique expertise in current sensing with more than 20 years
experience in lead acid battery technologies.
In high voltage battery management (BMS HV), the CAB series brings the LEM
expertise of the fluxgate technology to our customers.
The CAB series offer best-in-class accuracy and a high level of functionalsafety (ASIL) which avoids the installation of a redundant sensor.
We offer a broad range of single-phase Hall open loop sensors for highcompactness, fitted with an integrated busbar for cost effectiveness.
LEM developed dual range sensors with a dedicated low range to drastically
improve offset performance while delivering very high accuracy.

4

Batterymanagement

Motor
control

Charging
systems

Motor control
The LEM sensors dedicated to power inverter applications provide flexible
design to Original Equipment Manufacturers (OEMs) and Tier 1 suppliers as well
as solutions compatible with various subsystems: printed circuit design (PCD)
boards, power modules, integrated busbars, and standard busbar mountings.
Charging systems
LEM's newest product range brings technologies tailored to power
management systems from AC to DC and DC to DC for high and low voltage
applications. Future solutions dedicated to current leakage detection will meet
the technical requirements for bi-directional on-board charging (OBC) andvehicle-to-grid/load (V2G & V2L). Our solutions will be ranging from 5mA to
300mA and guarantee high levels of safety for end-users, sanctioned by the
ISO26262 ASIL certification, and the option to increase power density byremoving reinforced insulation.

5

Automotive

Technologies
LEM is committed to retaining technology
leadership, continuously investing in R&D
to deliver innovative products and solutions tocustomers, leveraging proven and cutting-edge
technologies.

LEM sensors
Our current and voltage sensors are used in a wide range of applications:battery management and start-stop applications for conventional cars,
electrical motor controls, battery pack management and charging systems forhybrid and electric vehicles.
Surface-mounted IC sensors
Power density is a critical factor for increasing performance, as spaceconstraints are prevalent in virtually every automotive application.
Ever increasing power densities are driving the emergence of new current
sensing technologies. Surface-mounted integrated circuit (IC) sensors
measure high currents in a very compact footprint and therefore havebecome the technology of choice.
Smarter sensors
Smart grid and autonomous driving are major disruptions caused by the digital
revolution leading to smarter, greener and more efficient ecosystems. LEM isat the forefront of these megatrends, developing smart sensors equipped withdata processing capabilities that insure higher safety levels thanks to
self-diagnostic features. The LEM sensors feature embedded software thatprovides real time information to the on-board system, offering customers
high-value and versatile solutions.

6

Hall open loop

Shunt

Accuracy OA
offsetPrice

Accuracy OA
offsetAccuracy
Ipmax

Nonintrusive

Resolution

Power
consumption

Fluxgate

Bandwidth

Price

Accuracy OA
offsetAccuracy
Ipmax

Nonintrusive

Resolution

Power
consumption

Bandwidth

Price

Accuracy
Ipmax

Nonintrusive

Resolution

Power
consumption

Bandwidth

Open loop technology
Open loop sensors use a Hall effect integrated circuit. The magnetic density,
contributing to the rise of the Hall voltage, is generated by the primary current
to be measured, which is supplied by a current source such as a battery or
generator. HEV and EV include battery monitoring, starter generators,
converters, electrical power steering, and motor drive applications.
Shunt technology
LEM shunt sensors, based on Ohm’s Law with voltage drop across the shuntproportional to its current flow, measure both alternating currents (AC) anddirect currents (DC). Low cost and high reliability, low resistance shunt sensors
are a popular choice for current measurement. Smart shunt technology offers
mechanical and electrical design suitable for both light and heavy duty
applications with multiple batteries.
Fluxgate technology
LEM’s fluxgate sensing head is made of an induction coil with particularcharacteristics. The core material has very high permeability and low
remanence (Hc), enabling very fast transition between linear and saturated
state. Energizing the coil with an alternative voltage makes the core go througha complete hysteresis loop. With a primary current flowing through the coil,the hysteresis loop is shifted. The measurement of this shift represents theprimary current.

7Automotive

12V battery management systems
LEM develops galvanically-isolated current
sensors dedicated to 12V battery management
for standard internal combustion engines (ICE)and smart BMS for start-stop powertrains.

Solutions for ICE vehicles
LEM brings more than two decades of experience in 12V BMS for lead acidbatteries and offers a leading product portfolio for standard ICE powertrains.
Solutions for start-stop vehicles
LEM offers a range of intelligent battery sensors that combine unique expertisein current sensing technologies with the experience acquired over the years inlead acid battery technologies.

12V battery sensor in vehicles

Fuel

EngineWheelsAlternator

Starter

Battery
12V

DC 12Vpower netCurrent
sensorMain ECU
8

Power
management

12V BMS sensor portfolio
Features

BMS standard ICE

BMS start-stop
SSVT

Smart shunts
SoX status
CAN/LIN transceiver

HBCT

Analog Hall + temp+/- 250A
Temperature at 1%

HABT

Analog Hall + temp+/- 120A
Temperature at 1%

HAB

Analog Hall effectApplications

12V BMS specifications
Sensor

HAB

HABT

HBCT

SSVT

Technology

Open loop

Open loop + temp

Open loop + temp

Smart shunt

Current range max+/- 400A+/- 120A+/- 250A+/- 1500A

OutputVoltage/PWM

Voltage/PWM

Voltage

CAN/LIN SoX status

Global error @25°C

0,8%

0,8%

0,8%

0,5%

Overall accuracy(over T°C)

3,75%

3,6%

3,75%

1,5%

Offset current+/- 200 mA+/- 200 mA+/- 350 mA+/- 20 mA

Bandwidth(programmable)

1.1 kHz

1.1 kHz

1.1 kHz

1.1 kHz

Mounting type

Cable

Cable

Clamp

Clamp

Input voltage

+5V

+5V

+5V

+12V/+24V

Consumption

7 mA

7 mA

10 mA

12 mA

9

Automotive

HV battery management systems
LEM high voltage battery pack BMS forhybrid and electric vehicles

Fluxgate technology
LEM brings a unique capability in fluxgate, the leading technology for highperformance battery management that offers contactless solutions.
The CAB series offers best-in-class accuracy (up to 0.1% and at IP max), an
offset at 0A measurement as well as ASIL readiness which avoids theinstallation of a redundant sensor.
The CAB fluxgate products are embedded in the battery disconnection unit
(BDU) or the battery pack of vehicles with electrified powertrains (xEV).
Hall open loop technology
LEM's broad portfolio of single range sensors combines high compactness andan integrated busbar design for cost effectiveness. LEM developed a highaccuracy dual range sensor with a dedicated low range to drastically improveoffset performances.
The LEM Hall-based products are suitable for the electronic measure of current
in high power and low voltage applications with galvanic separation between
the primary circuit (high power) and the secondary circuit (electronic circuit).
LEM offers the choice between different ranges of current measure in thesame housing while providing excellent accuracy and very good linearity, with
low thermal offset and thermal sensitivity drifts.

10Battery disconnecting unit architecture
HV (pack voltage measurement)

Main relay
Battery

Precharge
resistor

Fuse

Prechargerelay

HV sideLV sideRelay

Primary
current
sensor
ASIL ready

BMS master
control unit

Connector status
Main relay

HV (pack voltage measurement)* In case of ASIL ready sensor

Redundant
current
sensor(optional *)Isolation barrier

11Automotive

HV battery management systems
LEM high voltage battery pack BMS forhybrid and electric vehicles
From mid power to ASIL ready performance
LEM provides a portfolio of solutions featuring a wide range of power levels
that complies with the highest requirements of performance and safety.

HV BMS sensor specifications
SensorHSW

HAH1BVW

HSNBV

DHAB

Technology

Open loop

Open loop

Open loop dual range

Open loop dual range

Current range max+/- 1000A+/- 1200A+/- x00A+/- 1000A+/- x00A+/- 1000A

ASIL readiness

–

–

–

–

OutputVoltage single

Voltage single/dual

Voltage single/dual

Voltage dual

Global error @25°C

0,5%

0,8%

0,5% (single)

0,8% (single)

Overall accuracy(over T°C)

2,0%

2,0%

2,0%

2,8%

Bandwidth(programmable)

1,1 kHz

1,1 kHz

1,1 kHz

1,1 kHz

Mounting type

BusbarBusbarIntegrated busbar

Cable/Busbar

Input voltage

+5V

+5V

+5V

+5V

Consumption

7 mA

8/16 mA

Single 7 mA
Dual 14 mA

16 mA

12

HV BMS sensor portfolio
Hall open loop

Performance/Power

Single core

Fluxgate
Dual core

1500A

1000A high

CAB series

100A low(CAB 500, 1500)

DHAB

Cable/Busbar
mounting

HSNBV

Integrated busbar

1200A peak

HAH1BVW
250A rms
1000A peak

Busbar mounting

HSW

Busbar mounting
Applications

Mid power xEVHigh performance BMS

Mid power xEVHigh range, low range channel
Suitable for redundancy
Low offset

High power xEVHigh range, low range channel
Coulomb counting
Very low offset

High power
Very high performance
Coulomb counting
ASIL level/CAN bus output
Zero offset

CAB 500

CAB 1500

CAB 500 SF

CAB 1500 SF

Fluxgate

Fluxgate

Fluxgate

Fluxgate+/- 500A+/- 1500A+/- 500A+/- 1500A––

ASIL B

ASIL CCAN/LIN

CAN/LIN

CAN/LIN

CAN/LIN

0,1%

0,1%

0,1%

0,1%

0,5%

0,5%

0,5%

0,5%

100 Hz100 Hz100 Hz100 Hz

Cable/Busbar

Busbar

Cable/Busbar

Busbar

+12V

+12V

+12V

+12V

40 mA (0A)
130 mA(@500A)

40 mA (0A)
500 mA(@1500A)

40 mA (0A)
130 mA(@500A)

40 mA (0A)
500 mA(@1500A)

13

Automotive

Motor control
Maximum flexibility for power inverter
applications
LEM provides a broad, versatile range of sensors that enable flexible designfor various systems: gate driver boards, power modules, integrated busbar
and standard busbar mounting.
Electric and hybrid vehicle power motors (few kW to hundreds kW) use
multiphase inverters to drive the traction and generator motors with a highdegree of precision and reliability.
LEM offers standard and customized solutions to fit specific mechatronic
requirements.

Motor inverter architecture
IGBT stage

Current
sensors

BatteryMotor
DC link

Current
sensors
Gate driver
Micro controller

14For low to high power inverters (MHEV to BEV)
• Integrated current sensing technologies and PCB mounted sensors
For mid to high power inverters (HEV to BEV)
• Single busbar mounted sensor legacy family• Integrated busbar sensor for compactness, improved performance andeasy assembly
For high power inverters (BEV)• Multiphase sensors to improve system integration• ASIL ready features

Motor control sensor portfolio
Single-phase

Performance/PowerMultiphase

1500A

1000A

HC16FW

HSNDR

HAH1DRW

HAH2DR

HAH3DR series

HC5FW

800A

HC6 F/H
250A

HC2 F/H

Applications
Low power mild hybrid

Mid power xEVHigh power xEVHigh power multiphase sensor

15

Automotive

Motor control
Single-phase and multiphase sensors

LEM offers a wide range of solutions for all inverters• PCB mounted sensors• Busbar mounted• Integrated busbar• Multiphase sensors• Reference design sensors ** Infineon hybrid pack HAH3DR S07 Series

Single-phase sensor specifications
SensorHC2F/H

HC6F/H

HC5FW

HC16FW

HSNDR

HAH1DRW

Current rangemax

1 phase +/- 250A

1 phase +/- 800A

1 phase +/- 900A

1 phase +/- 1600A

1 phase +/- 1200A

1 phase +/- 1500A

Aperture type(size,
compatibility)

Busbar(7,2 x 2,5 mm)
ø 4,6 mmBusbar(10,5 x 4,2 mm)
ø 7,5 mmBusbarø 12,5 mm

Busbar(20,5 x 6 mm)

Integrated busbar(customization)

Busbar(20,5 x 6 mm)

Output type

Through-hole PCB
voltageThrough-hole PCB
voltageThrough-hole PCB
voltage

SMD or Throughhole PCB Voltage

Molex connector
voltageTyco connector
voltageAccuracy @25°C

1,2%

1,2%

1,2%

1,2%

1,25%

2%

Overall accuracy(over T°C)

3,25%

3,25%

3,25%

3,25%

3,2%

3,75%

Bandwidth

50 kHz

50 kHz

50 kHz

50 kHz

50 kHz

50 kHzInput voltage

+5V

+5V

+5V

+5V

+5V

+5V

Consumption
typical

15 mA

15 mA

15 mA

30 mA

15 mA

15 mA

16

Multiphase sensor specifications
SensorHAH2DR

HAH3DR S00

HAH3DR S03 SPx

HAH3DR S06

Current range max

2 phases +/- 650A

3 phases +/- 900A

3 phases +/- 900A

3 phases +/- 900A

Aperture type(size, pitch,
compatibility)

Busbar(13,8 x 2,3 mm)
Pitch 44 mm

Busbar(14,5 x 5,5 mm)
Pitch 30 mm

Busbar(15,5 x 7,5 mm)
Pitch 38,5 mm

Busbar(15,5 x 5,5 mm)
Pitch 38,5 mm

Output type

Voltage
JAM connector

Voltage
PCB mounted

Voltage
Hirose connector

Voltage
Molex connector

Accuracy @25°C

2%

2%

2%

2,5%

Overall accuracy(over T°C)

3,2%

3,5%

3,5%

4,25%

Bandwidth

50 kHz

50 kHz

50 kHz

50 kHzInput voltage

+5V

+5V

+5V

+5V

Consumption
typical

15 mA/phase

15 mA/phase

15 mA/phase

15 mA/phase

SensorHAH3DR S07 SPx

HAH3DR S0A

HAH3DR S0C

Current range max

3 phases +/- 1200A

3 phases+/- 1500A

2-3 phases+/- 800A

ASIL readiness

ASIL B/C––

Aperture type(size, pitch,
compatibility)

Infineon hybrid packlong/short tab(14,5 x 1,5 mm)
Pitch 47 mm

Busbar(ø 14,5 mm)
Pitch 34 mm

Busbar(14,5 x 5,5 mm)
Pitch 30 mm

Output type

Voltage pressfit

Voltage Molex connector

Voltage pin soldering

Accuracy @25°C

2%

1,2%

1,25%

Overall accuracy(over T°C)

3,2%

3,25%

3,25%

Bandwidth

50 kHz

50 kHz

50 kHzInput voltage

+5V

+5V

+5V

Consumption
typical

15 mA/phase

15 mA/phase

15 mA/phase17

Automotive

Charging systems
LEM offers dedicated technologies forcharging systems to support transfer energy
subsystems from AC to DC and DC to DC
with high and low voltage applications.

Low current applications
LEM has semiconductor based solutions for low current applications from
10A to 200Arms. Developed with cutting edge coreless technology, theseproducts offer isolated high performance sensing in semiconductor packages.
Easy to use and integrate, they are convenient for applications requiring highpower density or very low footprint on current sensing function such as OBC,
DCDC, EPS, BSG.

18

Charging systems sensor portfolio
Power/Current

250-1000A

Busbar mounted
200-500A

PCB mounted

10-200A

Integrated current sensor (ICS)

6 mA

Applications
Leakage current
Residual current detection

On-board charger
DC/DC primary

On-board charger
DC/DC secondary

Power DCDC fuel cell
DC/DC secondary

Bidirectional on-board charger architecture
Current measurement PFC

Current measurement LLC tank

Grid

Battery
vehicleAC

Totem pole PFC

Bi-directional LLC

19

Automotive

Charging systems
High efficiency power management is key to more
efficient systems and longer driving range.

With increase of accuracy and bandwidth lead by system
power density increase, LEM supports a wide range of sensors
for all applications:Integrated Current Sensors (ICS)Hall based SMD sensors for low to mid current(below 200A peak)
PCB mounted sensors
For busbar current measurements for mid to high current(200A to 2000A peak)
Busbar mounted sensors
For high power applications

20

PCB and busbar mounted sensor specifications
SensorHC2 F/H

HC5FW

HSNDR

HAH1DRW

HAM

Technology

Open loop

Open loop

Open loop

Open loop

Open loop

Current range max+/- 250A+/- 900A+/- 1200A+/- 1500A+/- 300A

OutputVoltage

Voltage

Voltage

Voltage

VoltageAccuracy @25°C

1,2%

1,2%

1,25%

2%

2%

Overall accuracy(over T°C)

3,25%

3,25%

3,25%

3,75%

3,2%

Bandwidth

50 kHz

50 kHz

50 kHz

50 kHz500 kHz

Mounting type

Through-hole PCB

Through-hole PCB

Integrated busbar

BusbarIntegrated busbar

Input voltage

+5V

+5V

+5V

+5V

+5V

Consumption

15 mA

15 mA

15 mA

15 mA

15 mA

Integrated current sensor specifications
SensorGO SMEGO SMSHMSR

Current range RMS

10-20A rms

10-30A rms

10-30A rms

Peak current

50A peak75A peak75A peak

Isolation

2,5kV

3kV

4,9kV

Accuracy (25°C - over T°C)

1,3% - 3%

1,3% - 3%

1% - 2%

Output type

AnalogAnalogAnalogVref/Ratiometric

Vref

Vref

Ratio/Vref

Temp. range-40°C to 125°C-40°C to 125°C-40°C to 150°C

Bandwidth

300 kHz300 kHz300 kHz

Supply voltage

3,3V/5V

3,3V/5V

3,3V/5V

AECQ100

Yes

Yes

Yes

Target applications

OBC primary, DCDC

OBC primary, DCDC

OBC, DCDC

Package

SOIC 8SOIC 16

SOIC 16 (footprint compatible)21

Automotive

Contact

North America
LEM USA inc. (Detroit)28221 Beck Road, Suite A4
Wixom, MI 48393
USA
Tel. +1 248 324 0395
Fax +1 248 324 0397
autosales-na@lem.com
EuropeLEM Europe GmbH
Frankfurter Strasse 74
64521 Gross-Gerau
Germany
Tel. +49 6152 930 10
Fax +49 6152 846 61
leu-de@lem.com

China
LEM Electronics (China) co. Ltd.
No. 28, Linhe str. Linhe
Industrial development zone
Shunyi district, Beijing
China
Post code: 101300
Tel. +86 10 89 45 52 88
Fax +86 10 80 48 43 03+86 10 80 48 31 20
autosales-china@lem.com
South Korea
LEM Management Services Sàrl,
Branch Korea(Seocho-dong, Wonil Bldg)
1-3F(311) 10
Nambushuhwan-ro 333-gil
Seocho-gu
Seoul, Korea
autosales-korea@lem.com

Japan
LEM Japan k.K.
2-1-2 Nakamachi
Machida-Tokyo 194-0021
Japan
Tel. +81 42 725 81 51
Fax +81 42 728 81 19
autosales-japan@lem.com
Rest of the world
LEM International SA
8, Chemin des Aulx
1228 Plan-les-Ouates
Switzerland
Tel. +41 22 706 13 92
Fax +41 22 706 13 28
automotive_sales@lem.com

L EM headquarters
Geneva, Switzerland

22

du
les D
Sa R& Pro

cti

on

North America
Detroit MI
Milwaukee WIColumbus OH
Amherst MA
Los Angeles CA
EuropeFrankfurt, Germany
Vienna, Austria
Brussels, Belgium
Randers, Denmark
Paris, France
Padova, Italy
Skelmersdale, UK
Lyon, France
Sofia, Bulgaria
China
BeijingShanghai
Shenzhen
Xian
Hefei
Taipei, Taiwan
South Korea
Seoul, South Korea
Japan
Tokyo, Japan
Rest of world
Geneva, Switzerland
Pune, India
Tver, Russia

23www.lem.com