Pack Systems Engineer – Solid-State Battery for Data Centers

Socket.dev; San Jose (CA); On-site; USD 137,000 - 209,000; Full time

Benefits offered by this job

Annual bonus

RSU/Equity package

Health care

Employee stock purchase plan

Job summary

QuantumScape in San Jose, CA is seeking a Battery / Pack Systems Engineer who owns the cell‑to‑pack integration, including mechanical packaging, BMS topology, and safety considerations for solid‑state battery racks in data center environments.

You will translate evolving cell specs into robust pack designs, collaborate across firmware, thermal, and cell teams, and drive test plans that validate safety, performance, and longevity at scale.

Qualifications

• 8+ years in battery pack/module design with prototype validation or production.
• Hands‑on BMS hardware architecture experience (topology and component selection).
• Cell characterization and modeling skills (impedance spectroscopy, capacity fade analysis, thermal characterization).
• Experience with battery safety standards, specifically UL 1973; UL 9540A exposure strongly preferred.
• Proficiency with pack‑level thermal modeling and mechanical design (SolidWorks, Creo, or equivalent; thermal simulation a plus).
• Comfortable working with evolving cell specs and making design decisions under incomplete data.

Responsibilities

• Design the cell‑to‑pack mechanical assembly: cell stacking, compression systems, interconnects and structural integration within the shared PSU+ BBU enclosure.
• Architect the BMS hardware topology and specify protection FETs, sense routing, and communication interfaces.
• Develop and tune state‑of‑charge and state‑of‑health estimation algorithms tailored to solid‑state cell chemistry.
• Co‑develop charge/discharge profiles with firmware for CC‑CV, temperature limits, fast‑charge protocols, and float strategies.
• Design the thermal interface between cells and enclosure in collaboration with the thermal team.
• Conduct pack‑level FMEA and safety analyses; define and execute abuse test protocols adapted for solid‑state cells.
• Design accelerated aging test protocols for data center duty cycles with high SOC and rare high‑power events.
• Serve as liaison to cell development, translating pack requirements to cell specs and feeding data back for design improvements.
• Support UL 1973 and UL 9540A safety certification activities.

Skills

Battery design

BMS architecture

Cell modeling

Safety standards

Thermal/Mechanical

Tools

SolidWorks

Creo

Thermal simulation

Job description

QuantumScape in San Jose, CA is seeking a Battery / Pack Systems Engineer who owns the cell‑to‑pack integration, including mechanical packaging, BMS topology, and safety considerations for solid‑state battery racks in data center environments.

You will translate evolving cell specs into robust pack designs, collaborate across firmware, thermal, and cell teams, and drive test plans that validate safety, performance, and longevity at scale.