LINS

Battery
Performance And Safety Tester

EV BATTERY PERFORMANCE AND SAFETY TESTING

            Safety testing involves subjecting cell components, cells, modules, and battery packs to stress conditions to characterize their response.

            The BTC-130 and BTC-500 are Battery Testing Calorimeters, which enable mechanical, electrical, and thermal stress tests to be safely carried out under adiabatic conditions on small and large batteries, respectively.

  • Mechanical stress: the BTC-500 can be equipped to perform a range of puncture tests
  • Electrical stress: the BTC-130 and BTC-500 can be fully integrated with charge-discharge units to support electrical stress tests. An external short circuit (ESC) option can also be provided
  • Thermal stress: the BTC-130 and BTC-500 maintain adiabatic conditions to help assess the component’s thermal stability. Thermal events that occur as a result of other stresses can be similarly characterized

           The use of adiabatic conditions, where heat generated is retained within the system, enables the hazard assessment to be conducted under worst-case scenarios.

Component


Component hazard screening
   Batteries are used in a wide variety of environmental conditions and undergo internal heating and cooling from both normal use and stress conditions.
   Therefore, it is vital to understand how individual cell components will behave under a range of temperatures early on in development. If a new cell component has a low temperature of self-heating, it could pose a thermal runaway risk. Similarly, if a rapid increase in pressure accompanies a thermal event, or if toxic gases are produced, this may indicate the use of the component should be reassessed.
      The BTC-130 facilitates the use of small volume test cells in addition to supporting the testing of small battery cells. This enables the thermal stability of individual cell components to be assessed under adiabatic conditions and informed decisions on how to proceed with cell development to be made.

CELL Module

  • Thermal stability data from thermal stress tests can help define the safe working temperature of the battery
  • The evaluation of over-charging and discharging rates allows the maximum safe voltage and maximum safe current to be determined
  • The consequences of mechanical stresses and external
    short circuits (ESC) can be evaluated
     Exploring thermal runaways and thermal propagation In general, most extreme conditions can result in thermal stress on the battery cell, which can lead to a thermal runaway. Therefore, for the development of safe batteries, it is essential to understand the mechanism of the thermal runaway in a cell, and how it propagates within a moduleor pack so that appropriate mitigation strategies can be implemented.
      The data obtained from the stress tests performed in the BTC-130 and the BTC-500 can be used to model a cell’s predicted thermal behavior. Successive onset temperatures of decomposition of components within the cell can be detected, and the resultant heat released determined. This can help to facilitate a mechanistic understanding of the thermal runaway within the cell. Further insight can also be derived from the external analysis of the composition of any evolved gases collected.The data obtained from the stress tests performed in the BTC-130 and the BTC-500 can be used to model a cell’s predicted thermal behavior. Successive onset temperatures of decomposition of components within the cell can be detected, and the resultant heat released determined. This can help to facilitate a mechanistic understanding of the thermal runaway within the cell. Further insight can also be derived from the external analysis of the composition of any evolved gases collected.