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Analysis of Semiconductor Based Pre-charge & Cut-off Circuits for 2W/3W Electric Vehicle Battery Management Systems Varroc Engineering Pvt, Limited
- Format:
- Book
- Conference/Event
- Author/Creator:
- Magar, Pradip, author.
- Conference Name:
- Symposium on International Automotive Technology (2021-09-29 : Pune, India)
- Language:
- English
- Physical Description:
- 1 online resource cm
- Place of Publication:
- Warrendale, PA SAE International 2021
- Summary:
- As the climate change and CO2 emissions are becoming prime concerns over the globe, Electric Vehicles (EV) are proving to be promising eco-friendly mobility solution. In India too, the transition to electric vehicles is gaining momentum. Batteries constitute a major chunk in the cost of an EV. Battery Management Systems (BMS) are of paramount importance for safety, performance, usability and lifetime of EV. Along with fundamental function of monitoring (cell voltage, pack voltage, pack current, cell/pack temperature), BMS must perform function of controlling (charger/load connect, disconnect, pre-charge) the battery pack in case of failures. In most EVs load capacitance (traction motor controller, charger, DC-DC converter) draws high inrush current from the battery pack. This may not only damage the contactors (connect/disconnect circuits) and other load components but can also affect the lifetime of cells within battery pack. Conventionally, contactor-based cut-off and relay-based pre-charge circuits are present in EVs. However, semiconductor-based cut-off control and pre-charge are gaining acceptance in 2W/3W EV battery packs due to advantages like compactness, robustness against mechanical vibrations and shocks, controllability, competitive cost and functional safety. This paper focuses on various methods of controlling inrush currents using semiconductor-based pre-charge and cut-off circuits. Simulations and practical results of semiconductor-based pre-charge circuits are discussed. It is concluded that, for effective design of BMS for small battery packs, semiconductor-based cut-off and pre-charge techniques will provide an added advantage of improving reliability, safety and controllability
- Notes:
- Vendor supplied data
- Publisher Number:
- 2021-26-0168
- Access Restriction:
- Restricted for use by site license
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