The market breakthrough of electric vehicles is mainly delayed by the still too high costs of the battery system. The novel distributed battery cell monitoring and management concept presented in this paper allows a significant reduction of the final battery pack costs. Further, due to economies of scale, it provides reduced development costs and much lower time-to-market. The proposed concept provides a contactless cost-efficient data transmission interface with capacitive coupling, thus making the development of a battery monitoring circuit for each battery module type needless. The costs are mainly reduced thanks to the high volume manufacturing approach of novel smart battery cells integrating all the sensors of the monitoring electronics together with passive cell balancing and cell heating function. This paper describes the possibilities offered by the proposed concept and shows implementation examples of such a contactless distributed battery cell monitoring
The various application scenarios of a battery system lead to versatile, often conflicting requirements for hardware, software and mechanical design. The intended use of a lithium-ion battery system in mobile and stationary applications determines a lot of restrictions such as design space and ambient conditions. Additional hardware and software requirements are dictated by engineering constraints like the safe operating area for a specific battery cell. This paper presents a flexible and extensible battery management system (BMS) for lithium-ion battery packages, which aims at addressing these issues. The flexible approach in the software architecture is therefore mandatory. The structure of the embedded hardware platform is introduced, and its modular setup is presented. An easy-to-use, yet powerful framework for building the software and its documentation is shown. With a view to being useful to a large community of developers and users, the hardware design and the software will be open-source and freely available. As a result, the presented BMS serves as an easy-to-use platform for academia research and as a development platform for industrial users
One of the most important physical parameters for state estimation in battery based Energy Storage Systems (ESS) is the temperature. This physical quantity does not only strongly influence state estimation for battery management systems, but also significantly affects lifetime and return on investment finally. Thus, monitoring the cell temperature is essential when high performance and efficiency is demanded. Contrary to this fact, less temperature sensors than battery cells are implemented in state of the art battery systems, to limit system costs. In this paper a low cost temperature sensor is presented. Based on printed electronics technology, a broad spectrum of designs and substrates is processable which leads to a variety of possible applications. After the selection of design and concept for battery applications, the processing of the sensor device is described. The main part of the paper is about the experimental validation of the printed temperature sensor performance. In a high power charge and discharge cycle of a single battery cell, the printed sensor is directly compared to state of the art temperature sensors implemented in mobile or stationary battery systems. Finally, the results are discussed and future perspectives are given. Both, the advantages and disadvantages of the printed temperature sensor are shown, whereas for the latter possible solutions are pointed out with respect to further developments
In mobile and stationary battery systems, lifetime expectancy is a key parameter for the calculation of monetary effectiveness. It significantly affects return on investment and therefore is a key parameter for the market breakthrough of the desired battery application. Battery life is influenced by two different factors, namely electrical utilization and environmental conditions. As higher temperatures lead to a faster deterioration of the lithium-ion battery, smart thermal design can not only increase battery lifetime, but also reduce cooling costs and improve overall efficiency. It is therefore essential to establish an effective thermal design through perfoming electrothermal modeling and characterization of the battery cell, battery module and fully assembled battery pack. In this paper, the motivation for electrothermal modeling of lithium-ion battery cells and modules is introduced and design challenges are identified for applications in mobile and stationary bat tery systems. An electrothermal model of batteries with appropriate cell chemistry for mobile and stationary applications is developed with focus on further implementation in thermal simulation of battery modules and packs. The parameterization process of the presented models is shown and a model of battery cells with derived parameters is presented. Finally, the electrothermal model is verified experimentally
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.