Controlling temperature of individual electrochemical cell during testing

A system comprising:

• a frame having an interior channel for coolant;
• and
• an apparatus mounted to the frame, the apparatus comprising:
• a clamshell configured for holding an electrochemical cell having first and second terminals, the clamshell comprising at least first and second portions hinged to each other;
• first and second contacts positioned for contacting the first and second terminals, respectively;
• a thermoelectric device mounted to the clamshell for controlling a temperature of the electrochemical cell;
• a fitting mounted to the frame that facilitates flow into or out of the frame, the fitting including a coolant path member configured to fit inside an O-ring fitting;
• and
• a positive thermal coefficient device positioned to detect temperature inside at least one of the first and second portions of the clamshell, wherein the positive thermal coefficient device is configured for detecting a safety cutoff temperature of the electrochemical cell.