By Steve Bush 10th August 2023
Eaton has introduced a pair of 500F sealed supercapacitor banks, replacing its earlier XLR-16R2507-R, according to component distributor Rutronik, which is stocking the new parts. Ceramic Capacitor Positive And Negative
The 16.2V XLR16R2507B-R, which can store up to 18.2Wh and deliver up to 38.6kW or 2.19kA peak (9.6kA shorted, 121A continuous).
Maximum ESR is 1.7mΩ and 5.2mA leakage is expected.
The 18V XLR-18R0507B-R holds up to 22.5Wh and delivers 47.6kW or 2.43kA peak (10.6kA shorted, 121A continuous).
Max ESR is the same as the one above and leakage is 8mA.
Lifetime is 1,500 hours for the 16V type and 1,000hr for the 18V capacitors – both at maximum temperature and voltage. One million charge-discharge cycles can be expected at +25°C. All of these are to 20% capacitance drop or a doubling of ESR.
“Due to their low self-discharge and low leakage current, the modules convince with a longer service life,” claimed Rutronik. “Thanks to the IP65 housing and stable performance at operating temperatures between -40°C and +85°C, they are predestined for use in harsh environments.”
However, the Eaton data sheet reveals a maximum cell temperature of +65°C.
Update: having asked Rutronik about the 85°C/65°C discrepancy, the product manager clarified that +85°C operation is available by running the devices at less than the rated voltages stated above.
The parts are sealed to IP65, and construction includes extruded aluminium side-walls and laser welded internal bus bars. Dimensions are 417 x 68 x 117mm plus terminals and 5.7kg.
Rutronik envisages them in automated guided vehicles, industrial emergency PSUs, variable frequency drives, robotics, engine starters and with hydrogen fuel cells in drives.
Its product page for the 18V supercapacitor is here, and Eaton’s product data sheet can be found here.
The same week, Kyocera AVX announced supercapacitor banks optimised for energy storage.
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