Cell Science

cell APPLICATION engineering

OPTIMIZED APPLICATION ENGINEERING THAT ENABLES HIGH PERFORMANCE AND SAFETY 

Our extensive cell selection process allows the company to rigorously test available cells and choose only the best, based on energy density, quality and safety standards

IN-HOUSE BATTERY
SAFETY TESTING

This allows for continuous destructive testing and failure analysis, providing quick and precise feedback for the safest product designs.

In-house testing capabilities include:

  • Cell, module, pack and destructive testing including fire and mechanical
  • Materials and components stability/ dielectric withstand at high voltage
  • Testing and validation of venting strategies
  • Abuse testing exceeds most stringent safety standards

Chemistry Agnostic Design

HIBERNIUM™ PLATFORMS OFFERS A CHOICE OF CHEMISTRIES AND BATTERY CHARACTERISTICS

any choice of cell chemistry

Xerotech’s chemistry agnostic design is not constrained to any single supplier or battery technology. This gives the flexibility to select optimal solutions tailored for specific end-user applications and to continually update to the latest chemistry and technology.

Depending on specific customer requirements we assist selecting between:

LFP – Lithium-Iron Phosphate

NMC – Nickel-Manganese Cobalt

NCA – Nickel-Cobalt-Aluminium

All chemistries are drop-in replacement options for each Xerotech battery system and  Xerotherm™ technology can provide the highest level of safety regardless of chemical stability.  
 
LFP

Provides

  • Very flat voltage discharge curve
  • Long cycle life
  • One of the most stable chemistries
  • Low energy density
  • Low cost
NMC

Provides

  • High capacity
  • High power
  • Medium Cycle Life
  • Medium cost
  • Good stability
NCA

Provides

  • Highest energy density
  • Highest power
  • Higher cost
  • Best fast-charging performance
  • Low-medium cycle life

why CELL SCIENCE MATTERS

MITIGATING WARRANTY RISK

Xerotech’s extensive cell characterization helps answer the most fundamental question in battery pack design – “when will the battery reach end of life?”. Battery lifetime is highly complex and determined by multiple interacting factors like depth of discharge (DOD), operating temperature, fast charging, charge rates, discharge rates and calendar life. Xerotech enables OEMs to make fully informed decisions around warranty estimation.

battery cell lifetime comparison

key guidelines

  1. No applications use 100% of battery cell datasheet capacity
  2. Using 90% of capacity (5-95% SoC) can TRIPLE lifetime

Multi-tiered Cell Validation

stage 1 - Datasheet verification (Days)

Electrical 

  • Capacity
  • Internal Resistance
  • Voltage Curves (Charge/Discharge)

Mechanical 

  • Dimensional Check
  • Weight Check 
  • Cell bonding 

stage 2 - IN-HOUSE SAFETY TESTING (weeks)

  • Internal UN38.3 Testing (T1-T8)
  • Supplier Process Quality Verification
  • Nail Penetration Testing 
  • External Crush Testing
  • Xerotherm™ Thermal Propagation Testing 

stage 3 - characterisation (months)

  • Long-term cycle life testing (DOD & Temperature sweep)
  • Parameterization for BMS algorithms (SOC, SOP, SOH)
  • Cell operating map and performance sweep
  • Warranty use-case determination
  • Continuous supplier process surveillance (Stage-1 each batch)

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