Application

BDU & BJB/PDU

The Battery Disconnect Unit (BDU) and the Battery Junction Box (BJB) or Power Distribution Unit (PDU) are important components for supplying power to the battery of an electric vehicle. With their high accuracy, our precision measurement sensors are specially designed to improve the efficiency of BDUs, BJBs and PDUs.

Front view of a generic EV battery pack with orange terminals, isolated on a black background

Switch components for battery management

BDUs and BJB/PDUs act as primary on/off switches for the battery and adapt to the vehicle's operating mode, both when charging and while driving.

The BJB or PDU takes over the distribution function. It directs the current precisely to the components that need to be supplied with power and at the same time protects them from overload. Performance and safety aspects make BDUs and BJBs/PDUs indispensable in modern electric vehicles. 

This is precisely why high precision and reliability are key characteristics of these systems. Our sensors help to fulfill these requirements.

Hands in gloves of technology experts Electric car, EV car opening a lithium-ion car battery

Precision measurement technology for BDUs & BJBs/PDUs

Electric car lithium battery pack and power connections on EV car background.

We specialize in the development of precision measurement technology that improves the efficiency of BDUs and BJB/PDUs. We offer customizable components for both high voltage (HV) and 12 to 48 volt applications.
12 to 48 volt applications. 

Our products are characterized by their high accuracy over the entire temperature range and always offer optimal performance under different conditions.

In addition, our products guarantee maximum reliability over their entire service life. Particularly noteworthy is the latest generation of our IVT series, which meets the requirements for functional safety in accordance with the strict DIN EN ISO 26262 standards.

Longer
battery life

Our components enable safe and loss-free disconnection of the battery from the system during the charging process. This preserves the capacity of batteries for longer.

Reliability and safety

Our sensors ensure a reliable power supply and protect the battery and electronic components from overloads and short circuits.

Precise power distribution

Our advanced measurement technology ensures precise power distribution. This improves the performance and reliability of the entire system and helps to optimize energy efficiency.

Our products for your BDU/BJB/PDU

If you cannot find a suitable product for your requirements here, please contact us.

BAL Resistor

Very low-resistance busbar shunt in a small design for battery management systems. Resistance value 100µOhm

Product area: Resistor
Size: 5216
Power (Watt): 12
Tol (%): 5.00
Res (Ohm): 0.0001

BAN Resistor

Very low-resistance busbar shunt for battery management systems or energy storage systems. Resistance value 25 µOhm.

Product area: Resistor
Size: 8436
Power (Watt): 36
Tol (%): 5.00
Res (Ohm): 0.000025

BAS Resistor

Very low-resistance busbar shunt for battery management systems or energy storage systems. Resistance values between 35µOhm and 500µOhm.

Product area: Resistor
Size: 8420
Power (Watt): 10 - 36
Tol (%): 5.00
Res (Ohm): 0.000035 - 0.0005

BAV Resistor

Very low-resistance busbar shunt for battery management systems or energy storage systems. Resistance values between 35 µOhm and 100 µOhm, Pressfit connections.

Product area: Resistor
Size: 8420
Power (Watt): 36
Tol (%): 5.00 - 10.0
Res (Ohm): 0.000035 - 0.0001

BAX Resistor

Very low-resistance busbar shunt for battery management systems or energy storage systems. Resistance values of 20 µOhm and 25 µOhm.

Product area: Resistor
Size: 8436
Power (Watt): 50
Tol (%): 5.00
Res (Ohm): 0.000005 - 0.00002

BSL Resistor

Where very high accuracy and reliability and a separation of the battery management system from the busbar currents is key to success, the analog sensor series from Isabellenhütte is the perfect fit. The temperature and current measurement designed for battery management ICs offers two of the most important functions of the battery management system with optimum functionality and expertise in shunt-based current measurement. Resistance value 100µOhm, NTC temperature measurement and DMC for factor-based TCR compensation

Product area: Resistor
Size: 5216
Power (Watt): 10
Tol (%): 5.00
Res (Ohm): 0.0001

BSN Resistor

Where very high accuracy and reliability and a separation of the battery management system from the busbar currents is key to success, the analog sensor series from Isabellenhütte is the perfect fit. The redundant temperature and current measurement designed for battery management ICs offers two of the most important functions of the battery management system with optimum functionality and expertise in shunt-based current measurement. Resistance value 25µOhm, NTC temperature measurement and DMC for factor-based TCR compensation

Product area: Resistor
Size: 8436
Power (Watt): 36
Tol (%): 5.00
Res (Ohm): 0.000025

BSS Resistor

Where very high accuracy and reliability and a separation of the battery management system from the busbar currents is key to success, the analog sensor series from Isabellenhütte is the perfect fit. The temperature and current measurement designed for battery management ICs offers two of the most important functions of the battery management system with optimum functionality and expertise in shunt-based current measurement.

Product area: Resistor
Size: 8420
Power (Watt): 20 - 30
Tol (%): 5.00
Res (Ohm): 0.00005 - 0.0001

BSX Resistor

Where very high accuracy and reliability and a separation of the battery management system from the busbar currents is key to success, the analog sensor series from Isabellenhütte is the perfect fit. The temperature and current measurement designed for battery management ICs offers two of the most important functions of the battery management system with optimum functionality and expertise in shunt-based current measurement. Resistance value 25 µOhm, NTC temperature measurement and DMC for factor-based TCR compensation.

Product area: Resistor
Size: 8436
Power (Watt): 45
Tol (%): 5.00
Res (Ohm): 0.000025

ICD-A Sensor

The ICD series is a compact precision current measurement system. It uses shunt-based current measurement for maximum accuracy and has a CAN interface. It also contains a 16-bit ADC for measured value acquisition. The ICD can be used in many 12V DC applications.

Product area: Sensor
Current Range: 0 - 500
Current Range Options: 100, 300, 500
Interface: CAN (2.0 a/b) communication - with termination, CAN (2.0 a/b) communication - without termination
Hardware setup: 12 V
Configuration: 16-bit analog-digital converter
Plating shunt: nickel plated

IVT-3-Base Sensor

The IVT 3 is a compact high precision current measurement device, which is built on a platform concept where functional components can be added to adapt to many different use cases. The IVT 3 series is developed according to ISO 26262:2018 (Road vehicles – Functional safety).

Product area: Sensor
Current Range: 0 - 1000
Current Range Options: 1000
Interface: CAN (2.0 a/b) communication - with termination, CAN (2.0 a/b) communication - without termination
Hardware setup: 12 V
Configuration: Isolated (1,000 V)
Plating shunt: nickel plated

IVT-3-Pro Sensor

The IVT 3 is a compact high precision current measurement device, which is built on a platform concept where functional components can be added to adapt to many different use cases. The Pro version supports insulation resistance monitoring and 3 or 6 voltage measurement channels. The IVT 3 series is developed according to ISO 26262:2018 (Road vehicles – Functional safety).

Product area: Sensor
Current Range: 0 - 1000
Current Range Options: 1000
Voltage Range: 0 - 1000
Voltage Channels: 6, 3
Interface: CAN (2.0 a/b) communication - with termination, CAN (2.0 a/b) communication - without termination
Hardware setup: 12 V, 24 V
Configuration: Isolated (1,000 V), isolated + insulation monitoring, isolated + insulation monitoring + As-/Wh-counter
Plating shunt: nickel plated

IVT-S Sensor

The IVT-S is a compact, high-precision current measurement system equipped with a CAN interface. The continuous current measurement covers a measuring range of up to ±2,500 A and can be extended by up to 3 voltage measurement channels (nom. 1000 V). The IVT-S has been the benchmark for precise current and voltage measurement since 2017.

Product area: Sensor
Current Range: 0 - 2500
Current Range Options: 100, 300, 500, 1000, 2500
Voltage Range: 0 - 1000
Voltage Channels: 3
Interface: CAN (2.0 a/b) communication - with termination, CAN (2.0 a/b) communication - without termination
Hardware setup: 12 V, 24 V
Configuration: Isolated (1,000 V)
Plating shunt: nickel plated, tin plated

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