CAP-XX offer 3 ranges of 2.7V cylindrical cells that are cost effective and meet needs from energy storage to pulse power delivery.
The GY12R7 range operates from 0V - 2.7V, -40C to +65C. They are radial lead parts from 1F, 240mOhms – 100F, 15mOhms. They are also available as dual cell modules rated at 5.5V, GY25R5 series, with the option of resistor or active balancing. Cells range from 6.3mm dia x 12mm long to 18mm dia x 60mm long.
The HY12R7 range operates from 0V – 2.7V, -40C to +65C, and can operate up to +85C when derated to 2.5V/cell.They are radial lead parts from 1F, 180mOhms – 50F, 23mOhms. They are also available as dual cell modules rated at 5.5V, 65C, HY25R5 series or to 5V at 85C. Cells range from 8mm dia x 12mm long to 18mm dia x 40mm long.
The GY12R7 low ESR range operates from 0V – 2.7V, -40C to +65C ranging from 1F, 120mOhms – 850F, 0.5mOhms. Parts up to 50F have radial leads while larger, lower ESR, higher current parts have solder tabs or lugs. Parts up to 50F are available as dual cell modules rated as
These ranges provide excellent peak power support for cold temperature operation where batteries struggle with ESR at -40C approximately 2x – 5x room temperature ESR, depending on the part.
Typical equilibrium leakage current for all these ranges settles to ~1uA/F, so ~1uA for the 1F cells to ~100uA for the 100F cells. This low ESR and low leakage current makes them an ideal power buffer between a low power energy source such as a Lithium Thionyl Chloride battery or an energy harvester and a high peak power load such as RF transmission. A typical Lithium Thionyl Chloride battery is in the order of ~10Ah capacity. A 5F module comprising of 2 x 10F cells will draw ~10uA leakage current or 88mAh per year or ~0.9% of the capacity of a 10Ah battery. Similarly a 10F cell only loses ~1% of power from a solar cell providing ~1mA. These larger cells which are very cost effective are suitable where space is not constrained and / or applications which require high energy storage to power applications with extended duration, e.g. 10s of seconds to register with a WiFi or cellular network, or for when ambient energy may not be available for extended periods, such as solar cells overnight.
Typical applications where space is not at a premium and these cells can be accommodated include smart meters which use high energy Lithium Thionyl Chloride batteries that have very poor power delivery, particularly in cold temperatures; providing peak power for GPS acquisition and transmitting location for asset and location tracking for heavy machinery, agricultural equipment, rolling stock, containers, vehicles etc.; industrial control and condition monitoring, for example using a vibration transducer to charge a supercapacitor which powers capture and reporting of the vibration spectrum or strain & displacement readings; powering solenoids or motors for locks and valves, setting the lock or valve in a safe state in case of power loss; in automotive applications to provide distributed peak power where there is space such as in a door cavity, tail light assembly, or dashboard, with a supercapacitor located at the load such as a blinker or door lock solenoid – the wiring harness can now be sized for average power saving weight and cost, and the supercapacitor can stabilise the vehicle voltage rail for functions such as GPS, DVR, other instrumentation and entertainment during sags, e.g. from engine cranking.
All these applications require long life. CAP-XX cells have been extensively tested for over 10,000hrs. After 10 years at 2.5V, 25 deg C, capacitance loss will be ~30% and ESR rise will be ~50%, depending on the part. Life is not an arbitrary C loss such as 30% or increase in ESR such as 100% - it is when the C and ESR of a supercapacitor no longer support the application. Life can be lengthened by starting with a higher C, lower ESR supercapacitor. CAP-XX can assist to ensure you select the best supercapacitor to meet your needs.