Battery Management System for Automotive

Battery Management System for Automotive

Such as reduction of power consumption and miniaturization are important in battery management system. Toshiba provides information on a wide range of semiconductor products suitable for charging circuit, cell balancing circuit, battery monitoring circuit, etc., along with circuit configuration examples.

Overall block diagram

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 DC-DC Converter DC-DC Converter ADC ADC MCU MCU CAN Line CAN Line IC output photocoupler IC output photocoupler High Side () High Side (＋) Low Side (ー) Low Side (ー) Sticking detection Sticking detection Pre charge switch Pre charge switch High side switch High side switch Low side switch Low side switch Sticking detection Sticking detection Sticking detection Sticking detection Isolation Isolation Isolation Isolation DC-DC Converter DC-DC Converter GND fault sensing GND fault sensing GND fault sensing GND fault sensing Wire (H) W Battery Management IC BatteryManagementIC Battery Management IC BatteryManagementIC Charging circuit (Prevention of sticking/Detection of mechanical relay sticking) Battery monitoring circuit Charging circuit (Ground fault sensing circuit) Charging circuit (Ground fault sensing circuit) Passive cell voltage regulation Adding redundancy to communications Battery shutdown circuit
Charging circuit (Prevention of sticking/Detection of mechanical relay sticking)

Example of a charging circuit in which a semiconductor switch is configured using a photovoltaic output photocoupler

Example of a charging circuit in which a photorelay is used to configure a mechanical relay sticking detection circuit

Charging circuit (Ground fault sensing circuit)

Example of a charging circuit in which a ground fault sensing circuit is configured using a photorelay

Passive cell voltage regulation

Example of passive cell voltage regulation circuit using PMIC

Example of passive cell voltage regulation circuit without PMIC

Battery monitoring circuit

Example of battery total voltage monitoring circuit using photorelay and IC output photocoupler

Adding redundancy to communications

Example of communication redundancy using a photocoupler

Battery shutdown circuit

Example of a battery shutdown circuit using a mechanical relay

Sub block diagram

Charging circuit (Prevention of sticking/Detection of mechanical relay sticking)
Charging circuit (Prevention of sticking)

Example of a charging circuit in which a semiconductor switch is configured using a photovoltaic output photocoupler

Example of a charging circuit in which a semiconductor switch is configured using a photovoltaic output photocoupler
Photovoltaic output photocoupler
Part Number
TLX9905
TLX9906
Toshiba Package Name 4pin SO6 4pin SO6
BVS (Min) [Vrms] @ t = 60 [s] 3750 3750
ISC (Min) [µA] @ IF = 10 [mA] 12 12
VOC (Min) [V] @ IF = 10 [mA] 7 7
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Charging circuit (Detection of mechanical relay sticking)

Example of a charging circuit in which a photorelay is used to configure a mechanical relay sticking detection circuit

Example of a charging circuit in which a photorelay is used to configure a mechanical relay sticking detection circuit
Photorelay
Part Number
TLX9175J
TLX9160T
Toshiba Package Name 4pin SO6 SO16L-T
BVS (Min) [Vrms] @ t = 60 [s] 3750 5000
ION (Max) [A]   0.05
RON (Max) [Ω]   250
IFT (Max) [mA] 3 3
IFC (Max) [mA]    
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Charging circuit (Ground fault sensing circuit)
Charging circuit (Ground fault sensing circuit)

Example of a charging circuit in which a ground fault sensing circuit is configured using a photorelay

Example of a charging circuit in which a ground fault sensing circuit is configured using a photorelay
Photorelay
Part Number
TLX9175J
TLX9160T
Toshiba Package Name 4pin SO6 SO16L-T
BVS (Min) [Vrms] @ t = 60 [s] 3750 5000
ION (Max) [A]   0.05
RON (Max) [Ω]   250
IFT (Max) [mA] 3 3
IFC (Max) [mA]    
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Passive cell voltage regulation
Passive cell voltage regulation (Use of PMIC)

Example of passive cell voltage regulation circuit using PMIC

Example of passive cell voltage regulation circuit using PMIC
General purpose small signal MOSFET
Part Number
SSM3K7002KF
SSM3J168F
SSM3J66MFV
Toshiba Package Name SOT-346 (S-Mini) SOT-346 (S-Mini) SOT-723 (VESM)
VDSS (Max) [V] 60 -60 -20
ID (Max) [A] 0.4 -0.4 -0.8
RDS(ON) (Max) [Ω] @ |VGS| = 4.5 [V] 1.75 1.9 0.39
Polarity N-ch P-ch P-ch
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Passive cell voltage regulation (Not use of PMIC)

Example of passive cell voltage regulation circuit without PMIC

Example of passive cell voltage regulation circuit without PMIC
Photovoltaic output photocoupler
Part Number
TLX9905
TLX9906
Toshiba Package Name 4pin SO6 4pin SO6
BVS (Min) [Vrms] @ t = 60 [s] 3750 3750
ISC (Min) [µA] @ IF = 10 [mA] 12 12
VOC (Min) [V] @ IF = 10 [mA] 7 7
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General purpose small signal MOSFET
Part Number
SSM3K7002KF
SSM3J168F
SSM3J66MFV
Toshiba Package Name SOT-346 (S-Mini) SOT-346 (S-Mini) SOT-723 (VESM)
VDSS (Max) [V] 60 -60 -20
ID (Max) [A] 0.4 -0.4 -0.8
RDS(ON) (Max) [Ω] @ |VGS| = 4.5 [V] 1.75 1.9 0.39
Polarity N-ch P-ch P-ch
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Battery monitoring circuit
Battery monitoring circuit

Example of battery total voltage monitoring circuit using photorelay and IC output photocoupler

Example of battery total voltage monitoring circuit using photorelay and IC output photocoupler
Photorelay
Part Number
TLX9175J
TLX9160T
Toshiba Package Name 4pin SO6 SO16L-T
BVS (Min) [Vrms] @ t = 60 [s] 3750 5000
ION (Max) [A]   0.05
RON (Max) [Ω]   250
IFT (Max) [mA] 3 3
IFC (Max) [mA]    
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IC output photocoupler
Part Number
TLX9304
TLX9309
TLX9310
TLX9378
TLX9376
Toshiba Package Name 5pin SO6 5pin SO6 5pin SO6 5pin SO6 5pin SO6
BVS (Min) [Vrms] @ t = 60 [s] 3750 3750 3750 3750 3750
VCC / VDD (Min) [V] 4.5     4.5 4.5
VCC / VDD (Max) [V] 20 30   5.5 5.5
ICC / IDD (Max) [mA]          
Output Interface          
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Adding redundancy to communications
Adding redundancy to communications

Example of communication redundancy using a photocoupler

Example of communication redundancy using a photocoupler
Transistor output photocoupler
Part Number
TLX9291A
TLX9185A
TLX9000
TLX9300
TLX9188
Toshiba Package Name SO4 4pin SO6 SO4 4pin SO6 4pin SO6
BVS (Min) [Vrms] @ t = 60 [s] 3750 3750 3750 3750 3750
VCEO (Max) [V] 80 80 40 40 200
Topr [°C] -40 to 125 -40 to 125 -40 to 125 -40 to 125 -40 to 125
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Battery shutdown circuit
Battery shutdown circuit

Example of a battery shutdown circuit using a mechanical relay

Example of a battery shutdown circuit using a mechanical relay
MOSFET with a built-in active clamp circuit
Part Number
SSM3K347R
SSM3K337R
Toshiba Package Name SOT-23F SOT-23F
VDSS (Max) [V] 38 38
ID (Max) [A] 2.0 2.0
RDS(ON) (Max) [Ω] @ |VGS| = 4.5 [V] 0.41 0.176
Polarity N-ch + Active Clamp Zener N-ch + Active Clamp Zener
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Low side switch / High side switch (up to 1 A)
Part Number
TPD1054F
TPD1052F
Toshiba Package name PS-8 PS-8
VBB (Max) [V]    
VCC (Max) [V]    
IO (Max) [A] 1.0 0.8
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Low side switch / High side switch (1 to 5 A)
Part Number
TPD1058FA
TPD1055FA
Toshiba Package name WSON10 WSON10
VBB (Max) [V]    
VCC (Max) [V]    
IO (Max) [A] 6.0 3.0
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General purpose small signal bipolar transistor
Part Number
2SA1832
2SC4738
2SC4116
2SA1586
2SC2712
2SA1162
Toshiba Package Name SOT-416 (SSM) SOT-416 (SSM) SOT-323 (USM) SOT-323 (USM) SOT-346 (S-Mini) SOT-346 (S-Mini)
VCEO (Max) [V] -50 50 50 -50 50 -50
IC (Max) [A] -0.15 0.15 0.15 -0.15 0.15 -0.15
Polarity PNP NPN NPN PNP NPN PNP
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Small signal bias resistor built-in transistor (BRT)
Part Number
RN1907FE
RN2907FE
RN1901
RN2901
Toshiba Package Name SOT-563 (ES6) SOT-563 (ES6) SOT-363 (US6) SOT-363 (US6)
VCEO (Q1) (Max) [V] 50 -50 50 -50
VCEO (Q2) (Max) [V] 50 -50 50 -50
IC (Q1) (Max) [A] 0.1 -0.1 0.1 -0.1
IC (Q2) (Max) [A] 0.1 -0.1 0.1 -0.1
Polarity (Q1) NPN PNP NPN PNP
Polarity (Q2) NPN PNP NPN PNP
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TVS diode (for CAN communication)
Part Number
DF3D18FU
DF3D29FU
DF3D36FU
Toshiba Package Name SOT-323 (USM) SOT-323 (USM) SOT-323 (USM)
VESD (Max) [kV] +/-30 +/-25 +/-20
IR (Max) [µA] 0.1 0.1 0.1
Rdyn (Typ.) [Ω] 0.8 1.1 1.5
CT (Typ.) [pF] @ VR = 0 [V], f = 1 [MHz] 9 9 6.5
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Solution Proposal

These documents explain the key points of recommended semiconductor products and their features. Please use them for product selection.

Solution Proposal
SolutionProposal_Battery Management System for Automotive / English (PDF:1.7MB)
SolutionProposal_Battery Management System for Automotive / Japanese (PDF:2.2MB)

Documents

Please see the following pages for other documents.

Design & Development

Switched Mode Power Supply Library

you can select and download various basic topologies of a power supply unit based on your actual requirements in order to verify the behavior of MOSFETs with your simulation environment.

Switched Mode Power Supply Library
Motor Control and Driver Circuit Library

you can select and download various basic topologies of motor driver such as three-phase inverter circuit based on your actual requirements in order to verify the behavior of MOSFETs and another devices for your simulation environment.

Motor Control and Driver Circuit Library
EDA/CAD Model Library

We provide simulation data, 3D models of packages, and land pattern models (2D models) used when developing product boards.

EDA/CAD Model Library
MCU Motor Studio

MCU Motor Studio features a PC Tool and motor control firmware dedicated to the TXZ+TM Family Advanced Class microcontrollers from Toshiba.

MCU Motor Studio
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