Reconfigurable Battery for Charging 48 V EVs in High-Voltage Infrastructure
48 V is emerging as a safe-to-touch alternative voltage level for electric vehicles (EVs). Using a low- instead of a high-voltage drive train reduces isolation efforts, eliminates the risk of electric shock, and thus increases the system safety. In contrast, fast charging of a 48 V battery would req...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-01-01
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| Series: | Electronics |
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| Online Access: | https://www.mdpi.com/2079-9292/11/3/353 |
| _version_ | 1797488372158038016 |
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| author | Stefan Haller Muhammad Farhan Alam Kent Bertilsson |
| author_facet | Stefan Haller Muhammad Farhan Alam Kent Bertilsson |
| author_sort | Stefan Haller |
| collection | DOAJ |
| description | 48 V is emerging as a safe-to-touch alternative voltage level for electric vehicles (EVs). Using a low- instead of a high-voltage drive train reduces isolation efforts, eliminates the risk of electric shock, and thus increases the system safety. In contrast, fast charging of a 48 V battery would require very high currents and is incompatible with the widely established high-voltage electric vehicle charging infrastructure. Instead of employing additional on board power converters for fast charging, the concept of a reconfigurable battery is presented. A small-scale prototype system is designed consisting of eight 48 V lithium iron phosphate battery modules. In series configuration, they can be charged at 460 V with up to 25 A. In 48 V parallel configuration, the peak discharge current is up to 800 A. The MOSFET-based reconfiguration system also operates as a module charge balancer during high-voltage charging. The cost overhead for the reconfiguration system is estimated to 3% for a scaled-up full size EV. Due to the additional reconfiguration switch resistances, the simulation of a 48 V 75 kW electric vehicle in the World harmonized Light-duty vehicles Test Procedure showed a performance reduction of 0.24%. |
| first_indexed | 2024-03-10T00:01:10Z |
| format | Article |
| id | doaj.art-47994eee4ee94a948e8f7ba4ea1a5d60 |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-03-10T00:01:10Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-47994eee4ee94a948e8f7ba4ea1a5d602023-11-23T16:15:31ZengMDPI AGElectronics2079-92922022-01-0111335310.3390/electronics11030353Reconfigurable Battery for Charging 48 V EVs in High-Voltage InfrastructureStefan Haller0Muhammad Farhan Alam1Kent Bertilsson2Department of Electronics Design, Mid Sweden University, Holmgatan 10, 85710 Sundsvall, SwedenDepartment of Electronics Design, Mid Sweden University, Holmgatan 10, 85710 Sundsvall, SwedenDepartment of Electronics Design, Mid Sweden University, Holmgatan 10, 85710 Sundsvall, Sweden48 V is emerging as a safe-to-touch alternative voltage level for electric vehicles (EVs). Using a low- instead of a high-voltage drive train reduces isolation efforts, eliminates the risk of electric shock, and thus increases the system safety. In contrast, fast charging of a 48 V battery would require very high currents and is incompatible with the widely established high-voltage electric vehicle charging infrastructure. Instead of employing additional on board power converters for fast charging, the concept of a reconfigurable battery is presented. A small-scale prototype system is designed consisting of eight 48 V lithium iron phosphate battery modules. In series configuration, they can be charged at 460 V with up to 25 A. In 48 V parallel configuration, the peak discharge current is up to 800 A. The MOSFET-based reconfiguration system also operates as a module charge balancer during high-voltage charging. The cost overhead for the reconfiguration system is estimated to 3% for a scaled-up full size EV. Due to the additional reconfiguration switch resistances, the simulation of a 48 V 75 kW electric vehicle in the World harmonized Light-duty vehicles Test Procedure showed a performance reduction of 0.24%.https://www.mdpi.com/2079-9292/11/3/35348 VEVcharginglow-voltagehigh-currentLFP |
| spellingShingle | Stefan Haller Muhammad Farhan Alam Kent Bertilsson Reconfigurable Battery for Charging 48 V EVs in High-Voltage Infrastructure Electronics 48 V EV charging low-voltage high-current LFP |
| title | Reconfigurable Battery for Charging 48 V EVs in High-Voltage Infrastructure |
| title_full | Reconfigurable Battery for Charging 48 V EVs in High-Voltage Infrastructure |
| title_fullStr | Reconfigurable Battery for Charging 48 V EVs in High-Voltage Infrastructure |
| title_full_unstemmed | Reconfigurable Battery for Charging 48 V EVs in High-Voltage Infrastructure |
| title_short | Reconfigurable Battery for Charging 48 V EVs in High-Voltage Infrastructure |
| title_sort | reconfigurable battery for charging 48 v evs in high voltage infrastructure |
| topic | 48 V EV charging low-voltage high-current LFP |
| url | https://www.mdpi.com/2079-9292/11/3/353 |
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