The project Easy Battery Handling - EBH has been carried out in our auspicial and completedfor Devantini Corporation, a development company in Halmstad with its main concern inenvironmental friendly innovations.EBH has solved one of many technical challenges in one of Devantini corporation?s largerprojects. This main project involves the development of an electric powered formula racingcar. The part of this car that involved EBH was the battery handling to guarantee safe andquick battery exchanges during pit-stops.The solution became an entire battery module, hanging on the side of the car on two spearspointing out from the car. The batteries are exchanged by a specially designed trolley that isinserted under the battery module.

When drivers overnight in the truck lots of electric energy is consumed by heaters, fans, lights and other extra equipment. If the engine is not running, this energy is taken from the lead/acid batteries of the truck which then needs to be recharged during operating hours. The fact that the charge acceptance of the lead/acid batteries is dependent on the temperature makes it hard to fully recharge the batteries at lower temperatures. A negative charge balance can lead to starting problems within a few days use in cold climate.In this thesis work, the effects of different battery charging concept are evaluated on the most common Scania battery (175Ah). A battery model is implemented in Matlab and some simulations of charging are made.

In hydropower plants it is necessary to always have local power supply. Therefore, the plants are equipped with batteries as stationary back up power. Vattenfall Vattenkraft is using lead acid batteries but has been investigating alternatives to replace them. The aim of this study is to investigate the potential of using Li-ion technology as back up power.The study showed that Li-ion batteries have many qualities. The Li-ion technology will decrease the space and maintenance demand.

New tools for the assessment of aphasia are important for bothclinical work and research. To see how they relate to already existing testscan increase their usefulness. Western Aphasia Battery ? Revised was translatedto Swedish and compared with the Swedish aphasia test A-ning, partlyto compare content and partly to see how sixteen people aged between 22and 92 with aphasia performed on the tests. The subtests did not correspondcompletely and the type of items included varied a lot.

The purpose of the project was to design an electric bicycle to offer thetarget group youth an attractive alternative to mopeds. The basis for theproject was user studies in which young people were interviewed andobserved in their daily environment.The project resulted in a product, designed with the focus of integratingthe battery to the shape, to create a wholeness that is simple andintuitive.!The product is easy to use and operate, with an automatic transmissionengine.! A smart modular system allows the user to choose design withmudguards, rear rack, or without. The battery design is based on "cradleto-cradle" to maximize the battery life and minimize environmentalimpacts.It was very fun and rewarding to have the opportunity to present theresults for the youth who showed great interest in the product.The project was conducted in collaboration with Designit and Cycleurope..

Most of the portable electronic devices use a battery as a primary power source. Nowadays, when the applications are becoming smaller and smaller and more power efficient, the designer needs to concentrate more on reducing power consumption, using secondary power sources and introducing power storage devices. Multiple power source availability and a power storage device on the board will make the applications much more useful and efficient in everyday use. This thesis proposes a power supply unit (PSU) for wireless sensor platforms which is capable of supplying a sensor node with energy from multiple sources, as well as status information from the PSU. Present power storage devices, like electric double-layer capacitors (EDLCs) and batteries, have become more and more common as their characteristics have developed.

Linux is a growing operating system in embedded systems. Today, Linux is not only in heavy servers but also in cell phones, PDAs, cameras and other devices running on battery power. While current technology is more energy efficient, more and more technologies are implemented into a single unit resulting in an overall increase of power consumption.Low power consumption is an increasingly important feature of a system today. Lower power consumption means lower costs, less environmental impact, and longer life for applications that runs on batteries.This work compiles methods to reduce power consumption of Linux systems. The work includes examining whether the available opportunities are platform-specific or of a more general nature.

The automotive market is currently undergoing a historical change where stricter emission legislations and ever increasing fuel costs have intensified the search for effective alternatives to the conventional internal combustion engine, which has resulted in a substantial trend towards electrification of powertrains. Storage of electrical energy is the fundamental component in this technology where the lithium-ion batteries are currently considered as the most appropriate solution. Lithium-ion batteries, however, as other types of batteries, can only be used efficiently and durably within a specific temperature range.This Master thesis has been carried out in collaboration with Electroengine in Sweden AB, situated in Uppsala, which has an ongoing project regarding development of a modular battery system for electric powertrains. The project is at a stage where an initial prototype has been developed which provides the foundation for this thesis. The study has addressed the battery system performance from a thermal perspective, in order to validate the ability of the system to create a thermally serviceable environment for the lithium-ion battery cells.

The purpose of this thesis is to investigate the possibility to make small, cheap and ultra low power sensor platforms, connected in wireless networks for monitoring of home and industrial environments. The concept is based on ideas from our supervisor, Jerry Lindblom. The developed system consists of a generic platform for different sensors, a receiver and software. A GPRS module from RO Rollytech AB and a database from Gema Industri AB have been modified and used to demonstrate an example of a complete system. To the platform, it is possible to connect any resistive sensor and any sensor that can act as a switch.

Results have shown that flow batteries may be a solution in the future as an effective and environmental friendly method to an energy storage system (ESS). The technology is reliable and has a high efficiency that comes with low energy losses and a long lifetime. The range of possible fields is suitable for cutting energy peaks in the power grid, by always have a ready and available energy storage that balances the production. By comparing the advantages of flow batteries with conventional batteries it is mainly the fact that they can conserve energy for a long time without being self-discharged thanks to that the storage capacity is in principle endless and limited by the size of the electrolytes tanks that makes them a great energy storage system. The batteries won?t take any damage or decrease in performance when charging or discharging it or if you exhausts it to 100 % and leave it discharged for a long time.

This report deals with RFID systems and how to detect nearby tags with the Mifare standard using only a microcontroller and an antenna circuit.The aim was to investigate whether there was any possibility to continuously search for a nearby tag for a system operated with batteries without compromising   the lifespan of the battery. At this time the system would take too long time to wake up and look for a tag to give a satisfactory battery lifespan, which should be done a couple of times every second.The report has two issues, namely:Is it possible to direct the microprocessor to detect and identify a nearby tag after the Mifare standard?What hardware is required for this to be possible?As the research method to provide answers to the above questions an action research was used. This approach has meant that the group worked on information retrieval, examined existing solutions, tested their own solutions and documented the results.The group examined an existing solution that can search for nearby tags with minimal energy consumption. An antenna circuit was built that was connected to the processor.

The consumption levels in Sweden, Denmark, Finland and Norway have been rising fo r the last decade. Even after the financial crisis of 2008, consumption levels continued their upward trend, regardless of the recession. The explanation seems to be, at least partly, that households tends to increase their debt ratio in order to continue the same standard of living as before in terms of consumption. It is clear, based of our results, that there is a connection between increased consumption and debt ratio for households. And the consequences of allowing loans to finance a sustained or increasing consumption may ultimately be difficult to manage.

Making accurate predictions of private consumption expenditures is a difficult task. This thesis examines if consumer confidence can be used to forecast consumption. Using regression analysis, the link between consumer confidence and private consumption expenditures is analyzed for Sweden between the years 1994 and 2005. Two different models are estimated. In the first model consumption is regressed only on consumer confidence, while model two is extended to contain more variables.

The presence of nostalgic emotions during consumption is often seen as something purely positive to a product. To evoke these emotions has become a very common tool in marketing and advertising. Paradoxically very few studies have focused on the effects of nostalgia. The purpose of the thesis has been to understand how the presence of nostalgic emotions during consumption effect consumers. The research model used is a quantitative study with testing of hypotheses generated from theory.

Swedish consumption habits led to a discourse on consumption needs of the general public during the first half of the 20th century, involving primarily several institutions, but also a variety of popular movement organizations, among which we find Kooperativa Förbundet. In this discourse, ascetic consumption and a rationalized outlook on consumption were idealized, as the Swedes needed to be economical not to live beyond their means. The objective of this study is to investigate the ideals this type of discourse conveys throughout the latter half of the 20th century. This will be achieved by investigating selected editions of the cookbook ?Vår Kokbok? published by Kooperativa Förbundet.