A large volume calorimeter developed for research studies of larger (EV) cells and modules.
The BPC is designed to quantify heat changes during charge and discharge ? at conditions that simulate use of the battery.
The BPC is not appropriate for stability, safety and abuse studies where battery disintegration is possible. The BPC has an upper temperature limit of 200°C but operates down to -30°C. Cryogenic operation is possible by linking to a refrigerated circulating bath.
A key and unique feature of the BPC is the ‘Thermal Diode’ heating system that allows current flow through the calorimeter. This eliminates need for conductive leads or cables to carry current. At high power operation such loads do come major heat loss and data error in calorimeters with no ‘thermal guard’. (The EV+ uniquely does have thermally guarded leads and these do minimise error)
With heat detection sensitivity at 0.005°C/min the BPC has stable specific detection for heat release. In conjunction with the THT surface area (multipoint) heat measurement option, the BPC at well below 1 w/g detection, is ideally suited for gaining information appropriate for Thermal Management.
The BPC used with THT ARC software and electronics can be used within the adiabatic isothermal or isoperibolic modes. The choice of mode relates to the studies undertaken.
Two stage insulated calorimeter construction
Internal cooling coil (connection to chiller)
Internal dry gas purge (preventing ice formation)
External and internal current & voltage cable connection to 2-stage calorimeter (thermal diode design).
- Allows connection to THT or user supplied Battery cycler or test system
Ancillary Ports Unit
- Offers ability to implement options & functionality such as pressure measuring, inertion, video, heat capacity or surface temperature distribution measurement.
Hardware Features & Performance
Temperature range : -30°C* to +200°C
Temperature measurement : Type N thermocouple
Temperature sensitivity : 0.01°C
Temperature accuracy : 0.1°C
Exotherm detection sensitivity : from 0.005°C/min
Exotherm tracking rate : to 20°C/min
Pressure measurement : 0-50 bar
Pressure accuracy : 0.5%
Electronic Cut Out
Installation & training
* dependent upon external chiller
Options are available from THT to increase the functionality of the BPC
Surface Temperature Distribution (Multipoint Option)
- Ancillary port available to allow THT Multipoint Option (8-24 thermocouple) to be implemented during test to monitor surface temperature variation.
Heat Capacity Measurement Cp Option
- Ancillary port available to allow the THT Heat Capacity Option (CPO) to be used.