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A robust contactless capacitive communication link for high power battery systems

Title data

Wenger, Martin M. ; Filimon, R. ; Lorentz, Vincent ; März, M.:
A robust contactless capacitive communication link for high power battery systems.
Event: 2014 IEEE 23rd International Symposium on Industrial Electronics (ISIE) , Jun. 1–4, 2014 , Istanbul, Turkey.
(Conference item: Conference , Speech with paper )

Official URL: Volltext

Project information

Project title:
Project's official title
Project's id
MotorBrain: Nanoelectronics for Electric Vehicle Intelligent Failsafe PowerTrain

Project financing: 7. Forschungsrahmenprogramm für Forschung, technologische Entwicklung und Demonstration der Europäischen Union
Bundesministerium für Bildung und Forschung
The research leading to these results has received funding from the European Union as part of the ENIAC JU under grant agreement n° 270693–2 (“MotorBrain”).

Abstract in another language

Large Li-ion battery systems are being used in a growing number of applications. Due to lack of standards and various requirements, the battery systems have to be specifically designed for each application. This need for a specific design also affects the battery monitoring circuit. In order to reduce design effort, distributed battery monitoring systems integrated into the cells were proposed. Economies of scale allow these circuits to be produced at low cost per unit as they will be needed in every single battery cell. One of the major challenges of the distributed battery monitoring concept is the communication link for the monitoring circuits: it has to be robust, reliable, and easy to install. As a possible solution, a capacitively coupled data transmission link for a battery system consisting of up to 100 smart battery cells is investigated by simulation and experiment. Relevant influence factors of the physical implementation on a capacitive voltage divider determining the transmitted data signal are identified and evaluated, considering application specific constraints. As a result, a suitable signal conditioning circuit using frequency shift keying (FSK) modulation is proposed and experimental results obtained with a prototype implementation of the proposed circuit are presented.

Further data

Item Type: Conference item (Speech with paper)
Refereed: Yes
Keywords: battery management; BMS; battery monitoring; data transmission; smart battery cell; AC coupling; frequency shift keying; FSK
Institutions of the University: Research Institutions > Research Centres > Bayerisches Zentrum für Batterietechnik - BayBatt
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: No
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 07 Jun 2022 09:01
Last Modified: 12 Aug 2022 07:08