High-Voltage Battery Pack Development for EV Platform

The Challenge

Developing a high-performance electric vehicle requires more than simply selecting an off-the-shelf battery pack. The manufacturer needed both standard and extended-range pack options that could be tailored to its unique platform requirements. This meant creating designs that maximized available space within the vehicle’s form factor while delivering the energy density and power necessary to meet ambitious performance and range targets.

In addition to the physical constraints, the packs had to integrate seamlessly with the vehicle’s electrical and thermal systems, ensuring safe operation under demanding real-world conditions. The solution also needed to satisfy a wide range of requirements, from crash safety and vibration resistance to thermal runaway protection and regulatory compliance.

Finally, the packs could not remain conceptual, they had to pass full validation testing prior to launch, proving they could deliver consistent performance, reliability, and safety in both laboratory and field environments. Meeting all of these requirements simultaneously posed a complex engineering challenge that demanded expertise across mechanical, electrical, thermal, and software domains.

Approach

Re:Build approached the project as a complete end-to-end development effort, bringing together mechanical, electrical, thermal, and software engineering expertise under one roof. The goal was not only to design battery packs that met performance requirements but also to ensure they could be validated, manufactured, and scaled for future production.

Key elements of the approach included:

  • System Architecture Development: Defined the overall pack architecture, including module configuration, high-voltage interconnections, cooling channels, and enclosure design to balance energy density, safety, and manufacturability.
  • Thermal Strategy Implementation: Applied advanced modeling and design techniques to integrate liquid cooling, heat spreaders, and safety venting, ensuring stable operation across a wide range of ambient conditions.
  • Electrical and Software Integration: Designed robust electrical layouts and a tailored battery management system (BMS) to provide real-time monitoring, protection, and optimization of pack performance.
  • Vehicle Platform Alignment: Collaborated closely with the OEM’s engineering team to ensure that the packs fit seamlessly into the EV platform, both physically and electronically, while preserving serviceability.
  • Validation Planning and Execution: Developed a rigorous test plan covering thermal runaway prevention, vibration and crash safety, cycle life, and compliance with automotive standards, ensuring readiness for market launch.

By coordinating these disciplines from the start, the team minimized development risks, streamlined validation, and set the stage for a scalable production pathway.

Solution

Re:Build delivered a complete, production-ready battery system designed to meet the demanding requirements of modern electric vehicles. The packs were engineered to balance performance, safety, and manufacturability, with a focus on scalability for future builds.

The solution included:

  • Mechanical Design: Custom enclosures and internal structures optimized for strength, packaging efficiency, and crash safety
  • Electrical Architecture: High-voltage systems designed for reliability, with advanced cell balancing and protection circuitry
  • Thermal Management: Integrated liquid cooling and heat dissipation strategies to ensure consistent performance across driving conditions
  • Software Integration: Battery management system (BMS) software tailored to monitor, protect, and optimize the packs in real time
  • Validation & Compliance: Comprehensive testing for thermal runaway protection, vibration/shock resistance, and industry compliance standards

By combining mechanical, electrical, thermal, and software expertise under one roof, Re:Build ensured the packs were not only high-performing but also aligned with the customer’s long-term production and platform goals.

Results

The project delivered battery packs that not only met the technical requirements but also positioned the customer for long-term success. By combining advanced engineering with thorough validation, Re:Build ensured the packs were safe, reliable, and seamlessly integrated into the EV platform. The outcome set a clear path for scaling production and accelerating future vehicle programs.

Key Outcomes

  • Custom High-Voltage Packs: Optimized for range, reliability, and efficiency
  • Validated Integration: Achieved full compliance and system performance benchmarks
  • Future-Ready: Established a scalable foundation for subsequent battery builds
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Let’s discuss how we can bring innovative solutions to your most challenging projects. Contact Re:Build Battery Solutions to learn more about our expertise in Battery Pack Design and Development for advanced applications.