Pack Performance Engineer

Role Summary

The Pack Performance Engineer owns the technical bridge between cell, BMS, and vehicle: defining and validating how a battery pack performs across its power boundaries, thermal envelope, and system requirements. This is a hybrid role that sits deliberately at the intersection of three disciplines — BMS/controls, systems engineering, and pack hardware/thermal — rather than living entirely inside one. You will define power and SOC/SOP limits and see them through to vehicle integration, translate performance requirements into validated system attributes, and own pack-level thermal and hardware performance from design through DVP.

Core Focus Areas

1. BMS Interface, Power Limits & Vehicle Integration

• Define battery charge/discharge current limits, combining SOC, temperature, and cell capability to establish accurate power boundaries
• Own SOC estimation and SOP (state of power) algorithm inputs and validation
• Lead cell balancing strategy and isolation measurement verification
• Drive BMS and Vehicle Control Unit (VCU) integration, ensuring pack performance data and limits are correctly interpreted at the vehicle level
• Support functional safety testing and requirements across chemistries (e.g. NCM, LFP)
• Assess the impact of production ramp, design changes, and process changes on battery system performance

2. Battery System Requirements & Performance Validation

• Translate electrified-powertrain architecture and performance targets into clear, traceable battery system requirements
• Own performance-attribute definition and specification across the battery system
• Build and maintain functional safety traceability from requirement to validation
• Lead systems-level validation planning and execution across battery systems, requirements, and vehicle integration
• Partner with powertrain, controls, and vehicle integration teams to keep requirements and validation evidence aligned

3. Pack Hardware Performance & Thermal Management

• Own pack-level performance evaluation: available power, internal resistance, and thermal performance
• Provide pack performance input into BMS configuration
• Lead battery performance testing including thermal cycling, thermal runaway characterization, and DVP execution
• Support custom high-voltage battery pack design, prototype build, and validation
• Own pack thermal / cooling system development, from concept through validated performance
• Analyze capacity, DCIR, cell-disconnect behavior and other pack-level performance data to inform design decisions

Required Experience & Qualifications

• Bachelor's or Master's degree in Electrical Engineering, Mechanical Engineering, or a related field
• 7+ years of experience in battery systems, BMS, or pack engineering at an EV OEM or battery systems supplier
• Hands-on experience with SOC/SOP estimation, cell balancing, and isolation measurement
• Demonstrated experience defining charge/discharge current limits and power boundaries across SOC, temperature, and cell capability
• BMS and Vehicle Control Unit (VCU) integration experience
• Experience defining battery system requirements and performance attributes, with functional safety traceability
• Experience with pack thermal design and validation — thermal cycling, thermal runaway, and DVP
• Experience with high-voltage battery pack design, prototyping, and validation
• Working familiarity with multiple cell chemistries (e.g. NCM, LFP)
• Strong cross-functional collaboration skills across systems, controls, hardware, and vehicle integration teams

Preferred

• A demonstrated “T-shaped” background spanning both BMS/controls and pack hardware/thermal domains, rather than depth in only one
• Experience in a high-volume EV production environment, including support through production ramp
• Direct ownership of functional safety (ISO 26262) traceability from requirement to validation
• Prior experience at an EV OEM or battery systems integrator (e.g. supporting passenger, commercial, or energy storage platforms)