• Title/Summary/Keyword: Electric car

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Lithium ion car batteries: Present analysis and future predictions

  • Arambarri, James;Hayden, James;Elkurdy, Mostafa;Meyers, Bryan;Abu Hamatteh, Ziad Salem;Abbassi, Bassim;Omar, Waid
    • Environmental Engineering Research
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    • v.24 no.4
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    • pp.699-710
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    • 2019
  • Electric vehicles (EVs) are spreading rapidly and many counties are promoting hybrid and fully EVs through legislation. Therefore, an increasing amount of lithium ion batteries will reach the end of their usable life and will require effective and sustainable end-of-life management plan which include landfill disposal or incineration. The current research focuses on more sustainable methods such as remanufacturing, reuse and recycling in order to prepare for future battery compositions and provide insights to the need recycling methods to be developed to handle large amounts of batteries sustainably in the near future. The two most prominent material recovery techniques are hydrometallurgy and pyrometallurgy which are explored and assessed on their relative effectiveness, sustainability, and feasibility. Hydrometallurgy is a superior recycling method due to high material recovery and purity, very low emissions, high prevalence of chemical reuse and implementation of environmentally sustainable compounds. Expanding recycling technologies globally should take the research and technologies pioneered by Umicore to establish a sustainable recycling program for end-of-life EVs batteries. Emerging battery technology of Telsa show the most effective designs for high performance batteries includes the use of silicon which is expected to increase capacity of batteries in the future.

Localization Performance Improvement for Mobile Robot using Multiple Sensors in Slope Road (경사도로에서 다중 센서를 이용한 이동로봇의 위치추정 성능 개선)

  • Kim, Ji-Yong;Lee, Ji-Hong;Byun, Jae-Min;Kim, Sung-Hun
    • Journal of the Institute of Electronics Engineers of Korea SC
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    • v.47 no.1
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    • pp.67-75
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    • 2010
  • This paper presents localization algorithm for mobile robot in outdoor environment. Outdoor environment includes the uncertainty on the ground. Magnetic sensor or IMU(Inertial Measurement Unit) has been used to estimate robot's heading angle. Two sensor is unavailable because mobile robot is electric car affected by magnetic field. Heading angle estimation algorithm for mobile robot is implemented using gyro sensor module consisting of 1-axis gyro sensors. Localization algorithm applied Extended Kalman filter that utilized GPS and encoder, gyro sensor module. Experiment results show that proposed localization algorithm improve considerably localization performance of mobile robots.

Failure Mode Analysis and Friction Material Development of the KTX tread Brake (고속철도 제륜자 결함분석 및 제륜자 개발)

  • Baek, Jong-Kil;Goo, Byeong-Choon;Koo, Jeong-Seo
    • Journal of the Korean Society for Railway
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    • v.14 no.2
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    • pp.109-115
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    • 2011
  • The shoe brake of the KTX is used in low speed when the electric brake is not effective. The main purpose of the shoe brake is to stop the train to a desired stop point at the station. Lots of defects have been encountered in the shoe brake unit since the KTX started its operation. To improve the reliability of shoe brake unit of the KTX power car, first of all, failure modes of the KTX shoe brake unit were analyzed. Main failure modes are cracks in the shoe friction material and fracture in the welded joints of the shoe backing steel structure. Several methods to remove the defects of the shoe brake unit were proposed and on-board tests were carried out: Increase of the strength of the shoe key and shoe cam, which decreased a little the occurrence of cracks in the shoe friction material; Redesign of the shoe backing steel structure, which eliminated the occurrence of the cracks in the backing plate but could not solve completely the crack problem in the shoe friction material; Development of a new friction material, which with redesign of the shoe backing steel structure could solve satisfactorily the crack problem in the shoe friction material.

Performance Characteristics of the Electrical Air Conditioning System for the Zero Emission Passenger Vehicle (무공해 승용 자동차의 냉방을 위한 전동식 냉방시스템 성능에 관한 연구)

  • Lee, Moo-Yeon;Cho, Chung-Won;Lee, Ho-Seong;Won, Jong-Phil
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.12 no.12
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    • pp.5430-5437
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    • 2011
  • The objective of this study is to investigate the cooling performances of the electrical air-conditioning system using electric driven scroll compressor for zero emission passenger vehicles. This air conditioner with air source was used R-134a as a refrigerant and installed in a real zero emission passenger vehicle for tests under various driving conditions. The cooling performance of the electrical air conditioner was affected by driving velocities and conditions of the tested vehicle. The condensing rate of the condenser during driving is better than that of the idle condition. The average cool down temperature in the cabin room decreased on average $5.2^{\circ}C$ with the increase of the outdoor temperature from $20.0^{\circ}C$ to $30.0^{\circ}C$. In addition, the cooling performances were sufficient for cooling loads of the tested passenger car under tested conditions.

A Result Analysis on Field Test for Localization Development of Axle Counter System (Axle Counter System 국산화 개발을 위한 현장시험 결과분석)

  • Ko, Joon-Young;Park, Jae-Young
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.9
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    • pp.6214-6220
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    • 2015
  • A track circuit has used stably more than 100 years for detecting train position, but solution of track circuit sort circuit incapacity due to a rust is necessary for side line in station yard, coast line and level crossing for conventional line in rural line. Domestically, Axle Counter System(ACS) has partially used for Hot Box System for high speed line and turnout for CBTC system. In contrast, most of countries has used ACS not only trunk line but also rural line and its application has increased for metro, electric car and industrial railway. In this paper, we has verified the operating status of ACS which installed with existing track circuit through log analsis to implement pilot application in mail track and turnout in station yard. And interface test with interlocking system has conducted at Obong shunting yard, as well as Cheongju station and has analyzed test result. Based on a test result, we made fail safe design, manufacturing skill and established system requirement specification for the smooth operation and maintenance.

Temperature Dependence of Volume Resistivity on Epoxy Nano-composites (에폭시 나노컴퍼지트 체적 고유저항의 온도 의존성)

  • Kim, Chang-Hoon;Lee, Young-Sang;Kang, Yong-Gil;Park, Hee-Doo;Shin, Jong-Yeol;Hong, Jin-Woong
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.24 no.10
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    • pp.834-838
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    • 2011
  • This research shows the electrical characteristic using excellent epoxy nano-composite of MgO 5.0 wt% and $SiO_2$ 0.4 wt% in mechanical strength test depending on nano-additive. First of all, volume resistance depending on nano-additive and temperature using high resistance meter (HP. 4329A) by increasing 10, 100, 1,000 V of applying voltage was measured. Moreover, temperature range of $25{\sim}120^{\circ}C$ with virgin sample was tested using TO-9B oven by Ando Company. The result showed that virgin and the samples added with MgO and $SiO_2$ had similar value of volume resistance in low temperature and low electric field region and reduced with slow slope. The nano-composite's volume resistance of sample added with MgO and $SiO_2$ had higher value than virgin sample's volume resistance in high temperature region more than $80^{\circ}C$. Moreover, the slope has steeply reduced. The volume resistance of sample added with MgO 5.0 wt% was $8.38{\times}10^{13}\;{\Omega}{\cdot}cm$ and it was 6.8 times more than virgin sample in high temperature at $120^{\circ}C$. The insulation characteristics were constant although filler has changed in low temperature region. But, in high temperature region, the value of volume resistance of sample with MgO 5.0 wt% was 7.6 times more than the virgin sample's volume resistance.

Energy Spectrum Analysis between Single and Dual Energy Source X-ray Imaging for PCB Non-destructive Test (PCB 비파괴 검사에 있어서 단일 에너지 소스와 이중 에너지 소스의 영상비교를 위한 엑스선 스펙트럼 분석)

  • Kim, Myungsoo;Kim, Giyoon;Lee, Minju;Kang, Dong-uk;Lee, Daehee;Park, Kyeongjin;Kim, Yewon;Kim, Chankyu;Kim, Hyoungtaek;Cho, Gyuseong
    • Journal of Radiation Industry
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    • v.9 no.3
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    • pp.153-159
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    • 2015
  • Reliability of printed circuit board (PCB), which is based on high integrated circuit technology, is having been important because of development of electric and self-driving car. In order to answer these demand, automated X-ray inspection (AXI) is best solution for PCB non-destructive test. PCB is consist of plastic, copper, and, lead, which have low to high Z-number materials. By using dual energy X-ray imaging, these materials can be inspected accurately and efficiently. Dual energy X-ray imaging, that have the advantage of separating materials, however, need some solution such as energy separation method and enhancing efficiency because PCB has materials that has wide range of Z-number. In this work, we found out several things by analysis of X-ray energy spectrum. Separating between lead and combination of plastic and copper is only possible with energy range not dose. On the other hand, separating between plastic and copper is only with dose not energy range. Moreover the copper filter of high energy part of dual X-ray imaging and 50 kVp of low energy part of dual X-ray imaging is best for efficiency.

Amendment Research of Safety Standard of Urban Railroad Vehicle for LRT (경전철 차량 안전기준 적용을 위한 개정 연구)

  • Hong, Jai-Sung;Lee, An-Ho;Cho, Bong-Kwan;Cho, Hong-Shik
    • Proceedings of the KSR Conference
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    • 2008.11b
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    • pp.441-445
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    • 2008
  • LRT is eco-friendly transportation system and can be constructed at less than half cost of subway. Therefore many local governments have planned to construct a various type of LRT and some of them were already under construction. In Para. 2 of Art. 22 of the "Enforcement Decree of Urban Railroad Act" - safety standard of urban railroad vehicle, It can't be operated if "structures and devices" don't come up to standard required to safety operation. Constructor or operator should give an order or operate according to safety standard in Art. 3 of the Safety Standard of Urban Railroad Vehicle. Safety Standard of Urban Railroad Vehicle of 2000 was reformed once to tighten fire safety standard in 2004 after subway accident in Daegue. It was entirely made for medium and large-sized electric motor car. LRT, based on driverless operation and articulated bogie, has different safety standard in signalling devices and the axle load. etc. So many institutes related LRT have required to amend. In this paper, we described features of LRT vehicle and necessity of amendment and discussed how it should be amended.

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Zn-Cr Alloy Plating from Acidic Chloride Bath: Effect of Temperature and Current Densities on Composition of Electrodeposits (산성염화욕에서의 Zn-Cr합금도금 : 합금화에 미치는 전류밀도와 온도의 영향)

  • Kang, Soo Young
    • Journal of the Korea Convergence Society
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    • v.9 no.11
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    • pp.285-290
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    • 2018
  • The steel has been used in modern industry, car maker and electric appliance. The steel have some problem, specially corrosion problem. To solve corrosion problem, Zn electrodeposit on steel have been adapted. Recently, The modern industry asks to increase corrosion resistance. Naturally, Increasing corrosion resistance increases the thickness of Zn electrodeposit. But increasing thickness of Zn electrodeposit has some problems. In making part, There are some crack. This crack cause to decrease corrosion resistance. To solve this problem, it is interested in Zn Based alloy electrodeposit such as Zn-Cr. Here, the influence of the electrolytic conditions on the composition of the alloy plating in the chloride bath was investigated. The results are explained by the cathode overvoltage curve of Cr and Zn. As the current density of the cathode increases, Zn content of electrodeposit decrease and Cr content of electrodeposit increase. As the temperature of the electrolyte increases, Zn content of electrodeposit decrease and Cr content of electrodeposit increase.

Study on the Content Characteristics of Waste Containing Brominated Flame Retardant (브롬화난연제 함유 폐기물의 함량 특성 연구)

  • Yeon, Jin-Mo;Kim, Woo-Il;Hwang, Dong-Gun;Cho, Na-Hyeon;Kim, Ki-Heon;Lee, Young-Ki
    • Journal of Korea Society of Waste Management
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    • v.35 no.8
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    • pp.692-700
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    • 2018
  • In this study, the results of PBDEs and HBCDs of the products and waste that contain BFRs such as domestic electronic products, automobiles and textile products were compared with international management standards, and their excess rates were calculated. Deca-BDE was detected among the PBDEs in TV rear cover plastics, car seats, automotive interior plastics, and automobile shredding residues of products and waste containing BFRs. The comparison with Basel Convention management standards (1,000 mg/kg) for PBDE-containing wastes (4 types in total) shows that the excess rate of all samples was less than 1.5%. The estimated excess rate compared to the EU and Basel convention management standards (1,000 mg/kg) for PBDEs (4 species + deca-BDE) and TV rear cover plastics was 37.5% (30 of 80 samples exceeded the standards). The estimated excess rate compared to the Basel convention management standards (1,000 mg/kg) for HBCD, building materials products and waste was 15.7% (17 of 108 samples exceeded the standards). In the case of PBDEs, it is necessary to remove only the rear cover of CRT TV among the electric and electronic products and treat it in the flame retardant treatment facility to improve the recycling collection system. In the case of HBCD, it is necessary to appropriately dispose of the recycled materials, heat insulation materials, TV plastics, and styrofoam in marine fishery among construction materials and restrict the use as recycled raw materials.