Intelligent Battery Sensors for 24 V electrical systems

15-10-2024

You want to monitor the condition of your commercial vehicle batteries? We support you with efficient 24 V energy management! Whether you want to monitor a battery pack with two 12 V batteries connected in series or each of your batteries separately.

 

The key points in short

  • The intelligent battery sensor (IBS) addresses the needs of vehicles with 24-volt architectures that require separate battery monitoring with two intelligent 12-volt battery sensors
  • It provides essential battery data for the vehicle’s energy management system
  • The IBS offers valuable insights into battery condition: State of Charge (SoC), State of Health (SoH) and State of Function (SoF)
  • Enhancing battery life by using data via the ECU to prevent deep discharging and ensure optimum charging conditions
  • Data can be accessed via a control panel, on-board computer or cloud services

 

 

What ensures precise and efficient energy management in the 24 V vehicles?

The intelligent battery sensors (IBS) from FORVIA HELLA play a crucial role in centralized energy management within vehicles. The Sensors are used in buses and coaches, trucks as well as in large construction machines.
The IBS reliably and accurately measures the voltage, current and temperature of the battery. Calculated of the basis of these measured values it also delivers valuable insights into the battery condition: state of charge (SoC), state of battery health (SoH) and the starting capability (SoF). The data can be accessed via a control panel or the on-board computer or cloud services. If the IBS has been integrated into the onboard telematics system, you can monitor the battery status of an entire vehicle fleet. This allows maintenance to be planned and downtimes to be avoided.

 

Additionally, the sensor also extends the service life of the battery: it uses data received via the control unit to prevent deep discharging and ensure optimum charging conditions.

 

Moreover, the sensor contributes to CO2 reduction by enabling the start-stop function: An automatic start-stop system requires an IBS. For this purpose, the IBS determines whether the batterie can provide enough energy for a restart. Once the battery has been sufficiently charged, the start-stop system automatically switches the engine off and on again when required.

 

 

What is the difference between single battery monitoring and battery pack monitoring?

 

Single battery monitoring
 

FORVIA HELLA addresses the needs of vehicles with 24-volt architectures that require separate battery monitoring. The concept involves two intelligent 12-volt battery sensors (IBS), each dedicated to monitoring a 12-volt battery. 
A voltage level converter/isolator is required for a lighter circuit. This device has a dual function: it acts as a secondary node for the control unit (ECU) and as a primary node for the intelligent battery sensors. The LIN signal is not only repeated, but also isolated. This maintains communication in the vehicle without the need for two separate LIN cables.

Single battery monitoring

Schematic illustration: Single battery monitoring of two 12 V batteries.

Battery pack monitoring
 

Another option is to monitor two 12 V batteries connected in series simultaneously with only one IBS. The IBS is connected to the negative battery pol of the first battery using the battery clamp.

The positive battery pols of both batteries are connected to the IBS by one cable each and the LIN interface is responsible for communication with the supervisory control unit.

 

The sensor guarantees accurate measurement of battery condition parameters: voltage, current and temperature.

Monitoring a battery pack

Schematic illustration: Monitoring a battery pack with only one IBS.

Find out more about the intelligent battery sensor for 24 V electrical systems on our product page.

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Batterieüberwachung zweier in Reihe geschalteter Batterien mit einem IBS.
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