Fast-charging – oorja

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Problem

Meet charging and infrastructure requirements while maintaining cell warranty compliance
Minimize degradation due to fast charging cycles
Design and validate the optimized protocol prior to deployment
Thermal constraints limiting charging performance and rate

Solution

Physics-based fast charging optimization framework
Assess multi-stage CCCV and pulse charging strategies considering thermal performance and degradation impact
Optimization within infrastructure and warranty constraints
Full protocol validation pre-deployment

Outcome

Optimized charging protocol identified to minimize fast-charging-induced lithium plating and degradation.
Charging protocols optimized to ensure compliance with cell supplier warranty requirements.
Reduced charging protocol optimization and finalization effort by 40%.
Thermal impact fully evaluated during the optimization phase.

Fast Charging Protocol Validation at 25°C

Protocol: 3C → 2C CC
4.18V cutoff 0.02C
Lithium plating risk monitored throughout

Experimental Voltage (V)
Predicted Voltage (V)
Experimental SoC
Predicted SoC

Max error in charging time: 1.4%
Conventional models assume ideal pack behaviour without any cell to cell variation: 40%
Thermal behaviour only discovered during hardware testing: 88 → 66 min
Late-stage validation increases the development cost: ✓

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