Software and Controls for BEV

No-propagation battery designs, structural cell integration, thermal systems for fast charging, and much more

Our proven Battery Management System (BMS), developed in-house, facilitates safe battery control, both at the prototype stage and in series – including comprehensive diagnosis (OBD, ISO26262) and precise monitoring. Featuring its own software and hardware, the BMS is designed for all battery types and sizes.

Battery BMS Rendering

It covers a wide range of applications and is available to you for immediate integration. Its core is an implemented, model-based control architecture, where we use physical models to simulate battery behavior. The software is compatible with AUTOSAR and non-AUTOSAR applications. All possible states can be tested and analyzed on the AVL Hardware-in-the-Loop (HiL) testbeds, including cell failure. As a modular system with optional cloud access, the BMS is suitable for comprehensive data analyses and for monitoring throughout the entire vehicle lifetime.

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Battery reliability 

Reliable prediction of battery behavior is extremely complex. Especially so when it covers the entire product lifecycle. This can only succeed with precise modeling of all effects that occur, such as breathing and swelling of cells, or age-related rise in resistance, and with corresponding parameter adjustments.

Battery safety

The swift pace of innovation in battery technologies also increases safety-related demands – an aspect that is often decisive for end users. Manufacturers need to use innovative testing and simulation methods to keep up with these rapidly changing requirements.

Value, profitability, and operating costs

In light of increasing cost pressure, most manufacturers are facing the challenge of reducing overall operating costs while also achieving improved battery value and profitability. This is made possible by intelligent data entry and fleet monitoring.

Efficiency in development 

Short commercial rollout times paired with high safety standards – these objectives are often difficult to combine in practice. To guarantee both, simulation is the ideal way to swiftly validate the battery design at an early stage.

BMS Image

Our BMS is built on the experience accumulated at AVL over more than 15 years of battery development. The system is being developed continuously, and the fourth generation is now available. The next upgrade will provide additional core functions with even more precise predictive models.

State of Charge (SOC):

  • Increased accuracy for lithium ferro-phosphate (LFP) batteries
  • Non-linear dynamic modeling
  • Optimal experiment design to reduce testing and calibration effort

State of Health (SOH):

  • Implementation of a model to predict aging and durability
  • Combination of SOH monitoring and durability prediction to increase precision and robustness

State of Function (SOF): 

  • Continuous calculation of current functional state 
  • Optimization of operational strategy to reach target durability, for example
  • Adjustment of SOF based on predicted durability and SOH estimations

Hardware (control unit and module controller):

  • Battery control unit with integrated high-voltage measurement and contactor control
  • Module controllers for up to 18 cells in series with a board footprint of 70 x 90 mm
  • Complete hardware and software implementation for ISO26262
  • For batteries up to 1000V and subpacks with parallel processing


The BMS of AVL has already proved itself in numerous customer projects. It is available as a self-contained black box solution, and in an open white box version, for seamless integration into your development and tool environment.

Virtual validation

Our validation is as broad as possible to fulfill all legal standards and specifications. It ranges from thermal-electric and mechanical design simulations to electromagnetic compatibility (EMC) and NVH simulations (noise, vibration, harshness) and the complete virtual validation environment.

Predictive BMS

You can use our BMS to make precise predictions about the energy requirements of your battery system. Thresholds can be adjusted flexibly at any time, based on changing infrastructure data.

Communication and interfaces

The battery management system is connected to the battery master control unit (BMCU), either directly using a wired powerline, e.g. SPI, or completely wirelessly. Reducing connections avoids sources of errors and saves costs.

Modular system offering

By choosing our BMS, you are opting for a modular system. This helps you to add value and profitability to the battery, optimize the charging strategy, and increase workshop efficiency. You also enable cost-efficient battery replacement and reduce the total cost of ownership.

Virtual battery development tools

Our many years of expertise with simulations and the associated tools guarantee an efficient development process. You benefit from clear frontloading of tasks, with rapid validation at an early stage.

Juergen Schneider

Embedding cells is pivotal in preventing battery aging. And a high-performance battery management system is key. This enables the dynamic load limits to be shifted, depending on the operational aging risk. Our tools are able to simulate most of these factors, allowing us to predict them virtually and take them into account in the development process.

– Jürgen Schneider, Senior Solution Manager Virtual Battery Development

Related Topics

We are constantly working on new solutions. The following might be interesting for you:

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Battery Development for Electric Vehicles

We drive technological progress at AVL. Based on the individual requirements of our customers, we develop tailored battery solutions for all types of vehicles. Our goal is to meet cost objectives and minimize the time to commercial rollout. AVL covers the complete spectrum of development – from innovation to process development for series production.

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Software and Controls Development and Verification

AVL is developing software systems and components that facilitate the functionality of Advanced Driver Assistance Systems and Automated Driving.

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Battery Modules and Packs

Benefit from our engineering expertise throughout the entire battery development process – from the initial idea to SOP and beyond. We offer a comprehensive set of services: in addition to engineering new batteries or derivatives, we support you in setting up cost-optimized, sustainable, and secure series production.

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Battery Industrialization and Manufacturing

In addition to building, testing, and validating batteries, we also develop the associated industrialization for you at our AVL Battery Innovation Center. This allows us to provide production-ready development, including production planning and process validation.

Moving steadily into the future: Find out what’s brand new in the field of battery development. 

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AVL Opens New Battery Innovation Center

Optimized development of battery functions and manufacturing processes

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