Optimizing for efficiency or battery life in a battery/supercapacitor electric vehicle
Optimizing for efficiency or battery life in a battery/supercapacitor electric vehicle
A novel energy control strategy for a battery/supercapacitor vehicle, which is designed to be tunable to achieve different goals, is described. Two possible goals for adding a pack of supercapacitors are examined for a test vehicle using lead-acid batteries: 1) improving the vehicle's efficiency and range and 2) reducing the peak currents in the battery pack to increase battery life. The benefits of hybridization are compared with those achievable by increasing the size of the battery pack by a comparable mass to the supercapacitors. The availability of energy from regenerative braking and the characteristics of the supercapacitors are considered as impact factors. Supercapacitors were found to be effective at reducing peak battery currents; however, the benefits to range extension were found to be limited. A battery life extension of at least 50% is necessary to make supercapacitors cost effective for the test vehicle at current prices.
batteries, electric vehicles, energy storage, supercapacitors
1526-1533
Carter, Rebecca
df20d805-0864-4311-bc1c-cd0532109a69
Cruden, Andrew
ed709997-4402-49a7-9ad5-f4f3c62d29ab
Hall, Peter J.
9b8dd582-8168-469c-b044-26e8ab048128
May 2012
Carter, Rebecca
df20d805-0864-4311-bc1c-cd0532109a69
Cruden, Andrew
ed709997-4402-49a7-9ad5-f4f3c62d29ab
Hall, Peter J.
9b8dd582-8168-469c-b044-26e8ab048128
Carter, Rebecca, Cruden, Andrew and Hall, Peter J.
(2012)
Optimizing for efficiency or battery life in a battery/supercapacitor electric vehicle.
IEEE Transactions on Vehicular Technology, 61 (4), .
(doi:10.1109/TVT.2012.2188551).
Abstract
A novel energy control strategy for a battery/supercapacitor vehicle, which is designed to be tunable to achieve different goals, is described. Two possible goals for adding a pack of supercapacitors are examined for a test vehicle using lead-acid batteries: 1) improving the vehicle's efficiency and range and 2) reducing the peak currents in the battery pack to increase battery life. The benefits of hybridization are compared with those achievable by increasing the size of the battery pack by a comparable mass to the supercapacitors. The availability of energy from regenerative braking and the characteristics of the supercapacitors are considered as impact factors. Supercapacitors were found to be effective at reducing peak battery currents; however, the benefits to range extension were found to be limited. A battery life extension of at least 50% is necessary to make supercapacitors cost effective for the test vehicle at current prices.
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Published date: May 2012
Keywords:
batteries, electric vehicles, energy storage, supercapacitors
Organisations:
Engineering Science Unit
Identifiers
Local EPrints ID: 357439
URI: http://eprints.soton.ac.uk/id/eprint/357439
ISSN: 0018-9545
PURE UUID: bbac0b3f-52b6-40c2-a40c-5ab9289952fa
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Date deposited: 07 Oct 2013 13:42
Last modified: 15 Mar 2024 03:43
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Contributors
Author:
Rebecca Carter
Author:
Peter J. Hall
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