Application
Battery Management System (BMS)
The battery management system (BMS) is the central control element for electric drives that use rechargeable batteries - for example in electric vehicles or systems for the use of renewable energies. With precision alloys, high-precision shunts and sensors, our product portfolio is specially designed to meet the requirements of this application.

Customized solutions for precise energy management
Isabellenhütte specializes in the development of customer-specific components for 12 to 48 V high-voltage applications. Our precision measurement technology is designed to provide high accuracy over the entire temperature range and ensure reliable performance even under challenging conditions.

In addition, our products are characterized by maximum reliability and meet the functional safety requirements in accordance with the strict ISO 26262 standards. These properties qualify our products for integration into high-performance BMS systems.
Let's pave the way to a smarter and more efficient future of energy management together.
Contact us to find out how we can work together to develop customized solutions that meet your individual requirements.
Optimized performance
The BMS monitors and protects the battery cells, calculates safe current values and balances the charge of the cells to ensure the best possible performance and service life.
Safety-
conformity
Our products meet the functional safety requirements of ISO 26262, which qualifies them for integration into high-performance battery management systems.
Precision & reliability
Our precision measurement technology offers high accuracy over the entire temperature range and reliable performance under various conditions, making it ideal for BMS systems.
Our Products for Battery Management Systems
If you cannot find a suitable product for your requirements here, please contact us.
BAL
Very low-resistance busbar shunt in a small design for battery management systems. Resistance value 100µOhm
Product area: | Resistor |
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Size: | 5216 |
Power (Watt): | 12 |
Tol (%): | 5.00 |
Res (Ohm): | 0.0001 |

BAN
Very low-resistance busbar shunt for battery management systems or energy storage systems. Resistance value 25 µOhm.
Product area: | Resistor |
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Size: | 8436 |
Power (Watt): | 36 |
Tol (%): | 5.00 |
Res (Ohm): | 0.000025 |

BAS
Very low-resistance busbar shunt for battery management systems or energy storage systems. Resistance values between 35µOhm and 500µOhm.
Product area: | Resistor |
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Size: | 8420 |
Power (Watt): | 10 - 36 |
Tol (%): | 5.00 |
Res (Ohm): | 0.000035 - 0.0005 |

BAV
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 |
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Size: | 8420 |
Power (Watt): | 36 |
Tol (%): | 5.00 - 10.0 |
Res (Ohm): | 0.000035 - 0.0001 |

BAX
Very low-resistance busbar shunt for battery management systems or energy storage systems. Resistance values of 20 µOhm and 25 µOhm.
Product area: | Resistor |
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Size: | 8436 |
Power (Watt): | 50 |
Tol (%): | 5.00 |
Res (Ohm): | 0.000005 - 0.00002 |

BSL
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 |
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Size: | 5216 |
Power (Watt): | 10 |
Tol (%): | 5.00 |
Res (Ohm): | 0.0001 |

BSN
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
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
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 |

BVE
2-terminal resistor made of composite material. Very low resistance values. Large connectors for high currents.
Product area: | Resistor |
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Size: | 5930 |
Power (Watt): | 4 - 15 |
Tol (%): | 1.00 - 5.00 |
Res (Ohm): | 0.0001 - 0.003 |

ICD-A
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 |
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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
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 |
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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
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
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 |
