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Extending battery life in transportation and mobile applications with supercapacitor technology
With battery life rising in prominence as one of the most critical areas of system performance and reliability, the introduction of supercapacitors is helping to extend life of batteries in two major application areas. First, they can dramatically reduce battery replacement costs in vehicles such as trucks, cars, ships and motor generators. Second, they can extend the run time as much as 400 percent in mobile devices such as smartphones and tablets. Supercapacitors, or supercaps, with their unlimited recharging capability and high power-density, provide automotive, heavy transportation, marine and traction applications with guaranteed engine starting over broad temperature range even when a battery fails. Designers of these systems should choose supercapacitors that deliver a long life-span and high reliability. One key parameter to consider in supercapacitor design is ESR performance. For transportation needs, lower ESR and performance over time translates to greater reliability and lower cost in the long term. Also, carefully consider weight, cost and temperature performance.
Cooper-Bussmann offers a range of supercapacitor solutions for engine starting from the XB series and XV series cells to the XVM Module. They are designed to cover a range of applications in transportation applications and can be selected based on the electrical system requirements and battery types.
Powerstor High Capacitance Supercaps: 300F & 400F
The following chart compares supercapacitor specifications against battery specifications. Batteries in this chart represent a range of technologies, from the lowest performance lead-acid types to the higher performance Lithium-Ion.
comparison between supercapacitors and batteries Key Characteristic
Voltage
Cold Operating Temp Hot Temperature Cycle Life
Powerstor 65F 16V rated Supercapacitor Module
In mobile electronic systems, supercaps provide the ability to regulate peak current over several different application usage scenarios. With better regulation of the discharge, the batteries are able to hold their peak capacity of energy longer and extend the run time of devices. Testing of a typical application on a mobile device – with a 6W for 40 seconds and 40W for 10 seconds power consumption cycle - reveals the advantage of combining supercaps with a battery. The battery was drained of its energy in 0.4 hours but when a supercap was added, the system run time was improved to 2.12 hours, marking a 400 percent increase by limiting the battery discharge to a 1C rate.
Calendar Life Energy Density Power Density Efficiency
Charge Rate Discharge Time
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Cooper Bussmann is now part of Eaton 19 focus magazine - issue 17
Units V
˚C ˚C
Years Wh/L W/L %
C/x
Supercapacitor 2.5 - 5
-40 +70 (85)
> 500,000 5 - 20 1 - 10
1000 - 10,000 > 98
> 1,500 Sec / Minutes
Batteries 1.2 - 4.2
-20 +60
300 - 10,000 0.5 - 5
100 - 350
100 - 3,000 70 - 95 < 40
Hours
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