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EVx Accelerating Rate Calorimeter

To implement tests with larger batteries THT have developed the EVx ARC

The EVx calorimeter is necessary for larger batteries, modules and small packs, power tools, satellite, military and associated applications. The EVx calorimeter is rugged and is sited in a secure containment vessel.

Within the containment vessel the standard ARC calorimeter (as in ES-ARC) can be used and this is regularly supplied for "Double Systems". Such a system gives versatility capable of measuring:- small prismatic, coin cell, 18650 and other larger batteries used in power applications.

With the EVx system all safety tests can be carried out as well as Battery Performance studies.

Overview
Specification
Options
Spares
Test Services

The EVx is an cylindrical calorimeter 25cm in diameter and 60cm depth.
Utilises the same electronics and software as the standard esARC, but with a larger calorimeter suitable for testing 18650 to large prismatic cells.

A larger and stronger blast box / containment vessel is supplied with built-in fume extraction.
The size of the containment vessel allows extra space for the incorporation of many options including heat capacity, multipoint option
for spatial temperature measurements, gas collection and controlled speed nail penetration.

Revision Date: 18/05/2022

Specification

Hardware Features & Performance

EVx Calorimeter
25cm diameter; 60cm depth;
20mm thick aluminium, 8 heaters, 6 measuring, control and safety thermocouples
Thermocouple resolution 0.001°C, Precision <0.2%, Accuracy 0.7%
Adiabatic Control to 0.01°C
Collar for large cable ingress
Pre-installed facilities for options

Temperature range
Ambient to 350°C temperature range
(-40°C with liquid nitrogen flow option LNF)

Sensitivity (applicable to new calorimeters only)
0.05°C/min
Potential to achieve 0.02°C/min to 300°C

Pressure
Pressure range 0-200 bar (or specify range to 700 bar with alternative transducers)
Resolution 0.005bar, Precision 0.02%, Accuracy 0.05%

Control Modes
Adiabatic; Ramping, Isothermal modes, True Isothermal, Isoperibolic, Step Isothermal.

Safety
1.93 cubic meter containment vessel (Blast Box);
3mm reinforced Steel, Proximity Switch, Door interlock;
Automated Fume Extraction facility

Sample Holders
Hastelloy, titanium, stainless steel, aluminium, glass, ARC bombs (9cm3), low phi bombs (65cm3) tube bombs (1cm3) special open or closed holders for any battery type.

Customer Support

Installation & training - 1 week, acceptance test

Support
Guarantee 1 year, phone and email support over lifetime of instrument without charge

Part Supply
10 years guaranteed

Manuals
Full operations and data analysis
manuals with tutorials

Software & Computing Power

Control Software
National Instruments Labview based ARC-ES Control Software
Full on-the-fly change of test conditions
Full on-the fly operation

Remote User facilities
Ability to transfer operation on system to any allowed PC over network or internet

Virtual Technician facility
Set up multiple tests in one method

Data Analysis Software
National Instruments Labview based ARCCAL+ analysis software
Features include: Graphical and tabulation of raw data including Phi Corrected TMR plots
Data Conversion to Enthalpy, Power, Gas Generation
Kinetic Modelling for thermodynamic and kinetic data analysis
Phi Correction through kinetic modelling
Report generation in Microsoft Word, Excel, HTML
Analysis of 9 concurrent data sets; 3 analyses on each data set, merge all datasets to a single plot.