Identifying Defects in Li-Ion Cells Using Ultrasound Acoustic Measurements

Identification of the state-of-health (SoH) of Li-ion cells is a vital tool to protect operating battery packs against accelerated degradation and failure. This is becoming increasingly important as the energy and power densities demanded by batteries and the economic costs of packs increase. Here, ultrasonic time-of-flight analysis is performed to demonstrate the technique as a tool for the identification of a range of defects and SoH in Li-ion cells. Analysis of large, purpose-built defects across multiple length scales is performed in pouch cells. The technique is then demonstrated to detect a microscale defect in a commercial cell, which is validated by examining the acoustic transmission signal through the cell. The location and scale of the defects are confirmed using X-ray computed tomography, which also provides information pertaining to the layered structure of the cells. The demonstration of this technique as a methodology for obtaining direct, non-destructive, depth-resolved measurements of the condition of electrode layers highlights the potential application of acoustic methods in real-time diagnostics for SoH monitoring and manufacturing processes

Intercity passenger transport study

Section 1 : A review of the status of the technology for tracked air cushion vehicles -- Section 2 : Linear induction motors as applicable to guided transport vehicles -- Section 3 : Propulsion of high speed ground transportation vehicles -- Section 4 : Magnetic suspension for guided transport vehicles ; a state-of-the-art survey -- Section 5 : Evaluation of the Aerotrain Guideway -- Section 6 : Construction and operating costs for the AerotraiI-80 TACV in the Canadian corridor.Alternative title from overall study name.Includes bibliographical references

Road Accident Data, 2014

Abstract copyright UK Data Service and data collection copyright owner.Road accident statistics are collected from information about personal injury road accidents and their consequent casualties, to a common national standard. The aim of collecting and publishing national road accident statistics is to inform public debate and to provide the basis for determining and monitoring effective road safety policies to reduce the road accident casualty toll. They are an essential requirement for monitoring targeted reductions in road accident casualties. The credible monitoring of targeted reductions requires that data are reported consistently and accurately, and both national and local government, and local reporting police forces, work closely to achieve a common reporting standard. Users should note that for 1985-1991, and from 2002 onwards, the Vehicle Record file does not contain breath test data. This change has been made in order to protect confidentiality. Data for 1985-1990 were deposited at the Archive at the beginning of 2006. Prior to this, the Archive only held the Road Accident Data series from 1991 onwards. No extra documentation was available for the 1985-1990 data, so users are advised to consult the documentation for the 1991 survey. Further information about the Road Accident Data series and research based on it may be found on the government road accidents and safety statistics webpages. These studies comprise information gathered using STATS19 and STATS20 forms. Main Topics:The collection process for these data includes the recording of details about the accident, together with the vehicles and casualties involved, which in principle can be easily discerned by the police either at the scene of the accident, or when they are reported to the police at a later date after the accident. The details recorded include accident time, date and location; vehicle type, location and manoeuvre; driver details; casualty details and severity

Road Accident Data, 2010

Abstract copyright UK Data Service and data collection copyright owner.Road accident statistics are collected from information about personal injury road accidents and their consequent casualties, to a common national standard. The aim of collecting and publishing national road accident statistics is to inform public debate and to provide the basis for determining and monitoring effective road safety policies to reduce the road accident casualty toll. They are an essential requirement for monitoring targeted reductions in road accident casualties. The credible monitoring of targeted reductions requires that data are reported consistently and accurately, and both national and local government, and local reporting police forces, work closely to achieve a common reporting standard. Users should note that for 1985-1991, and from 2002 onwards, the Vehicle Record file does not contain breath test data. This change has been made in order to protect confidentiality. Data for 1985-1990 were deposited at the Archive at the beginning of 2006. Prior to this, the Archive only held the Road Accident Data series from 1991 onwards. No extra documentation was available for the 1985-1990 data, so users are advised to consult the documentation for the 1991 survey. Further information about the Road Accident Data series and research based on it may be found on the government road accidents and safety statistics webpages. These studies comprise information gathered using STATS19 and STATS20 forms. Main Topics:The collection process for these data includes the recording of details about the accident, together with the vehicles and casualties involved, which in principle can be easily discerned by the police either at the scene of the accident, or when they are reported to the police at a later date after the accident. The details recorded include accident time, date and location; vehicle type, location and manoeuvre; driver details; casualty details and severity

National Speed Survey, 1987

Abstract copyright UK Data Service and data collection copyright owner.To measure the speeds at which drivers choose to travel in unconstrained conditions on motorways and non built-up A roads (both single and dual carriageway), subject only to the normal maximum speed limit.Main Topics: Variables Vehicle type; vehicle speed; separation distance from vehicle in front; length and height of HGVs

Road Accident Data, 2011

Abstract copyright UK Data Service and data collection copyright owner.Road accident statistics are collected from information about personal injury road accidents and their consequent casualties, to a common national standard. The aim of collecting and publishing national road accident statistics is to inform public debate and to provide the basis for determining and monitoring effective road safety policies to reduce the road accident casualty toll. They are an essential requirement for monitoring targeted reductions in road accident casualties. The credible monitoring of targeted reductions requires that data are reported consistently and accurately, and both national and local government, and local reporting police forces, work closely to achieve a common reporting standard. Users should note that for 1985-1991, and from 2002 onwards, the Vehicle Record file does not contain breath test data. This change has been made in order to protect confidentiality. Data for 1985-1990 were deposited at the Archive at the beginning of 2006. Prior to this, the Archive only held the Road Accident Data series from 1991 onwards. No extra documentation was available for the 1985-1990 data, so users are advised to consult the documentation for the 1991 survey. Further information about the Road Accident Data series and research based on it may be found on the government road accidents and safety statistics webpages. These studies comprise information gathered using STATS19 and STATS20 forms. Main Topics:The collection process for these data includes the recording of details about the accident, together with the vehicles and casualties involved, which in principle can be easily discerned by the police either at the scene of the accident, or when they are reported to the police at a later date after the accident. The details recorded include accident time, date and location; vehicle type, location and manoeuvre; driver details; casualty details and severity

National Speed Survey, 1983

Abstract copyright UK Data Service and data collection copyright owner.To measure the speeds at which drivers choose to travel in unconstrained conditions on motorways and non built-up A roads (both single and dual carriageway), subject only to the normal maximum speed limit.Main Topics: Variables Vehicle type; vehicle speed; separation distance from vehicle in front; length and height of HGVs

Road Accident Data, 2013

Abstract copyright UK Data Service and data collection copyright owner.Road accident statistics are collected from information about personal injury road accidents and their consequent casualties, to a common national standard. The aim of collecting and publishing national road accident statistics is to inform public debate and to provide the basis for determining and monitoring effective road safety policies to reduce the road accident casualty toll. They are an essential requirement for monitoring targeted reductions in road accident casualties. The credible monitoring of targeted reductions requires that data are reported consistently and accurately, and both national and local government, and local reporting police forces, work closely to achieve a common reporting standard. Users should note that for 1985-1991, and from 2002 onwards, the Vehicle Record file does not contain breath test data. This change has been made in order to protect confidentiality. Data for 1985-1990 were deposited at the Archive at the beginning of 2006. Prior to this, the Archive only held the Road Accident Data series from 1991 onwards. No extra documentation was available for the 1985-1990 data, so users are advised to consult the documentation for the 1991 survey. Further information about the Road Accident Data series and research based on it may be found on the government road accidents and safety statistics webpages. These studies comprise information gathered using STATS19 and STATS20 forms. Main Topics:The collection process for these data includes the recording of details about the accident, together with the vehicles and casualties involved, which in principle can be easily discerned by the police either at the scene of the accident, or when they are reported to the police at a later date after the accident. The details recorded include accident time, date and location; vehicle type, location and manoeuvre; driver details; casualty details and severity