Browse Publications Technical Papers 2013-01-1535
2013-04-08

Pulse Power Testing of Batteries and Supercapacitors for Hybrid Electric Vehicle Applications: A Comparison of Constant Current, Constant Power, and Ramped Power Transients 2013-01-1535

The central performance requirement for electrochemical energy storage systems for the full power-assist hybrid electric vehicle (HEV) is pulse power capability, typically 25-40 kW pulse power capability for 10 seconds duration. Standard test procedures utilize constant current pulses. However, in the HEV application, the power transient for acceleration is a ramped power transient and the power transient for regenerative braking power is a descending power ramp. This paper compares the usable power capability of batteries and supercapacitors under constant current, constant power, and ramped power transients. Although the usable battery discharge power is relatively insensitive to the transient type applied, 10-40% higher regenerative braking charge capability is observed with ramped power transients. With supercapacitors, the discharge and charge capability is much more strongly dependent on the type of power transient. The discharge power capability in a ramped power transient is 2.4 times that in a constant current pulse. The regen charge power capability is over 3 times that in a constant current pulse. Standard constant current test procedures thus underestimate the power capability of supercapacitors for HEV applications by several-fold. Supercapacitors provided over 2500 W/kg usable power for HEV applications, exceeding that of high power nickel metal hydride and lithium ion batteries tested.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Modeling of Lithium-Ion Battery Management System and Regeneration Control Strategy for Hybrid Electric Vehicles

2013-01-0939

View Details

TECHNICAL PAPER

A Review Study of Methods for Lithium-ion Battery Health Monitoring and Remaining Life Estimation in Hybrid Electric Vehicles

2012-01-0125

View Details

TECHNICAL PAPER

The Development and Testing of a Lead-Acid Battery System for a Hybrid Electric Vehicle (Rholab - A Foresight Vehicle Project)

2003-01-2288

View Details

X