Battery and fuel cell test equipment consists of specialized test stations, stands or systems, monitors and component modules for performance or endurance testing. Test stands or systems may include load banks, test controllers, gas or fuel supply modules, temperature control modules (e.g., ovens and chillers), and data acquisition units. Battery testers, monitors, and analyzers and diagnostic systems monitor overall or cell voltage, charge, amperage, DC resistance, or temperature to indicate battery condition or performance.

There are several ways to mount, operate, and integrate battery testers and fuel cell test equipment. Some equipment, such as the diagnostic systems used in laboratories, mounts on a panel or rack, or stores in a cabinet. Other equipment is handheld and portable, or designed for bench or desktop applications. Transducers, IC chips, and OEM sensors integrate testing into the energy storage product directly. 

Battery testers and fuel cell test equipment can be used to test a variety of energy storage products, including batteries, photovoltaic (PV) cells, fuel cells, and supercapacitors. Batteries convert energy into electrical current. PV solar power supplies convert light directly into electricity. Fuel cells include specialized systems and modules for performance or endurance testing. Ultracapacitors, or “super capacitors”, store energy electrostatically within an electrolytic solution between two nonreactive porous plates. Ultracapacitors can be charged and discharged hundreds of thousands of times. 

Battery testers and fuel cell test equipment provide a variety of test capabilities. These features include AC, line, and endurance testing; impedance, voltage, and current measurement; and conductance measurement capability. Some battery testers and fuel cell test equipment generate a voltage-current plot and determine the Tafel constant. The voltage-current plot indicates the power and efficiency of an individual cell or fuel cell stack. The Tafel constant is used in calculations of the voltage-current density relationship at the electrochemical level.

Special features also distinguish different types of battery testers and fuel cell test equipment. Some devices include alarms and buzzers to provide an audible or visible indication that an energy system has reached a particular condition. Other devices allow operators to run fault diagnostics and provide power management. Automated battery testers and fuel cell test equipment can operate without operator intervention.