Peak Energy

Peak Energy

Senior Cell Validation & Reliability Engineer

Burlingame, California · Senior · Full-time

Sponsorship not specifiedDetected 51 days ago
Data AnalysisStatisticsLeadershipRenewable Energy

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About the role

  • Senior Cell Validation & Reliability Engineer

Responsibilities

  • Validate the electrical and mechanical integration of supplier cells into Peak Energy ESS platforms; own the cell-side validation verdict at each integration point.

Nice to have

  • Track reliability performance across supplier lots and chemistries
  • participate in root cause analysis of cell-related reliability failures and feed findings back into test plans and supplier requirements.
  • participate in DFMEAs for cell-driven failure modes.
  • B.S. in Mechanical, Electrical, or Chemical Engineering or a related field
  • 5+ years in battery cell/module/pack validation or reliability engineering within automotive or stationary energy storage.

Company info

  • Peak Energy is the first American venture to advance globally proven sodium-ion battery systems as the storage standard for the new era of renewable energy on a resilient grid.
  • Sodium-ion is cheap, readily available, and safe - making it the leading contender in a rapidly evolving market.
  • Our leadership team is powered by decades of expertise in scaling gigawatt-level innovation at world-class companies such as Tesla, Northvolt, Apple, Powin, Enovix, Zipline, Solid Power, SunPower, and Fluence.
  • We are backed by strategic investment and product partners including TDK Ventures, Eclipse Ventures, and GM Ventures.
  • We recently announced America's first sodium-ion grid storage factory in Sacramento with production starting Q1 2027, and over $1B in signed customer commitments including Jupiter Power and Energy Vault.
  • About the Role - Senior Cell Validation & Reliability Engineer
  • Peak Energy is seeking a Senior Cell Validation & Reliability Engineer to own the validation and reliability foundation for the cells integrated into our energy storage systems.
  • This role will move beyond cell specification verification to quantify how cell-to-cell and batch-to-batch variation impacts system-level performance and reliability.
  • You will design the studies, own the statistical analysis, and deliver cell-level validation verdicts and reliability inputs that inform Peak Energy's system design and 20-year calendar life expectations.
  • You will work closely with cell test engineering, cell modeling, ESS engineering, supplier quality, and other cross-functional teams to translate cell performance and variation into actionable system requirements.
  • Test execution will be carried out by the cell test engineering team, predictive modeling by the cell modeling function, and system design and system-level reliability evaluation by ESS engineering.
  • This role owns the cell-side validation and reliability inputs that connect those functions.
  • The ideal candidate combines strong battery validation experience with applied reliability statistics and is comfortable turning complex test data into clear engineering decisions.
  • (Responsibilities)
  • Cell-to-System Integration Validation
  • Move validation from spec verification to population statistics: design cell-to-cell and batch-to-batch variation studies and quantify how variance propagates to system-level performance - balancing burden, thermal gradients, mechanical preload windows, and energy/power delivery.
  • Mechanical: validate cell behavior under system-representative compression; characterize force versus state of charge and swell over life; deliver force-displacement-life datasets that inform foam/pad selection and preload design by systems engineering.
  • Electrical & BMS: Assist in analysis with measured variation accounted for of OCV characterization, equivalent-circuit parameters; quantify cell-in-system versus bench performance deltas.
  • Establish the statistical foundation: measurement system analysis (MSA / Gauge R&R) across cell test equipment, capability analysis against specification, and statistically justified sample sizes, acceptance criteria, and validation exit criteria.
  • Cell Reliability Ownership
  • Own the cell reliability test roadmap: inform sample size requirements for calendar life, cycle life, and accelerated aging test plans designed explicitly to inform reliability analysis - not only to characterize performance.
  • Deliver the authoritative cell-level input to system reliability evaluation: failure-rate estimates, life distributions under product duty cycles, degradation trajectories, and derating guidance.
  • Track reliability performance across supplier lots and chemistries; participate in root cause analysis of cell-related reliability failures and feed findings back into test plans and supplier requirements.
  • Cross-Functional Interface
  • Own the cell-requirements and reliability-input handoffs; participate in DFMEAs for cell-driven failure modes.
  • Share variation and reliability findings with supplier quality: this role owns the performance and reliability implications of variation.
  • Pair with cell modeling: measured variation and life data validate equivalent-circuit, thermal, and degradation models; model predictions guide test-plan design.
  • What You'll Bring (Qualifications)
  • B.S. in Mechanical, Electrical, or Chemical Engineering or a related field; M.S. preferred.
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