EV Li-on Battery Thermal Runaway Testing: ''ARC-type'' BTC
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Features & Benefits

Features and Benefits

Features

Phi-TEC BTC Design

  • Choice of Standard phitec I configuration for small batteries (eg 18650-type) or larger unit with sample drum for larger batteries (35 x 35cm)
  • Controlled Heating - banks of heaters distribute heat evenly
  • Direct Temperature measurement
  • 8 different Temperatures are recorded for a "complete picture"
  • Optional electronic suite for shorting/overcharging simulations

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Safety Built-in

  • Steel Pressure casing.
  • Self-Operating Pressure-Relief Vent
  • Automated Software shutdown - including emergency cooling

Suitable for testing

  • Complete Batteries
  • Battery components ( Anode, Cathode, Electrolyte, SEI)
  • Battery of any charge status (including Overcharged and Over-discharged)

Adiabatic Calibration

Auto-Calibration that takes only 30min and can be performed before each experiment. Auto-Calibration keeps device always in perfect calibration and also adapts automatically to different sizes and shapes of test cells and batteries or other samples.

Cycler Integration

Power Cyclers, fully software integrated and controlled can be supplieed for a range of power/current loads, enabling different charging, discharging, shorting and other common operations to be automatically tested. Client's own units can also be used.

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Testing

The system employs two standard test types...

  • Stability Testing...

...For the preliminary screening of batteries, with a view to assesing their thermal stability. The sample is ramped until an exotherm is induced - analogous to a DSC test.

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  • Heat - Wait - Search...

...is the classical "ARC" test developed by Dow and widely used for decades. The sample is heated stepwise with pauses in between heatings to "search" for an exotherm within the sensitivity of the device. Once an exotherm is detected, adiabatic tracking commences.

This test is used to assess battery stability - by determining the lowest temperature at which the battery begins to self-heat. The kinetics and Energy release can also be qualified, to aid chemical development.

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  • Testing to Destruction...

...Batteries can also be placed in a pressure cell so that decomposition can proceed to destruction - allowing gas evolution rates and temperature increases to be measured in the event of decompostion in a confined space.

...Abuse testing - investigating battery performance changes due to physical damage (such as penentration or crush damage) is also possible with standard and custom design options available.

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  • Power Release and Cp Determination...

...The average specific heat or Cp (heat per unit mass) of a battery can be obtained with the BTC. This allows the "self-heating" of the battery to be quantifed as a power output. The power is determined as a function of the rate of temperature-rise and Cp.