The document discusses a conductive polymer binder developed at LBNL that can be used in silicon anode lithium-ion batteries. Silicon offers a much higher theoretical capacity than traditional graphite anodes, but its large volume changes during charging/discharging can lead to capacity fading. The novel binder is flexible and conductive, allowing it to tightly bind silicon nanoparticles and maintain electrical contact through the volume changes. This overcomes challenges facing silicon anodes and enables their use in applications like electric vehicles to significantly increase energy density. The technology has potential for commercialization and competition with other companies working on silicon anode solutions.
Nuclear batteries are devices that generate electricity from radioactive isotopes without using a chain reaction. They provide a long-lasting, compact power source as an alternative to chemical batteries that require frequent replacement. The document traces the historical development of nuclear batteries from their conception in 1950 and discusses different types including thermal and non-thermal converters. It covers considerations for radioactive fuels, advantages like longevity and efficiency, disadvantages like cost, and applications such as in pacemakers. In summary, the document provides an overview of nuclear batteries, their working principles, development over time, and potential uses as a long-life power source.
Device Modeling of Li-Ion battery MATLAB/Simulink ModelTsuyoshi Horigome
This document describes a MATLAB/Simulink model of a lithium-ion battery that simulates the battery's charge and discharge characteristics over time. The model accounts for parameters like battery capacity, state of charge, and number of cells. It can be used to simulate the battery's voltage over time during charging and discharging at different current rates. The document provides the model schematic, explains the modeling concepts, and shows examples of simulation results for charge time, discharge time, and voltage versus state of charge.
rechargable batteries and lead acid batteryTANISHQBAFNA
Lead-acid batteries were the first rechargeable battery invented in 1859. They work through chemical reactions between lead and lead dioxide electrodes and sulfuric acid electrolyte. Overcharging can produce explosive gases. Lead-acid batteries are used in many applications due to their low cost. Nickel-cadmium batteries were introduced in the 1960s and have higher energy density than lead-acid. They use cadmium and nickel oxide electrodes with an alkaline electrolyte but cadmium is toxic. Nickel metal hydride batteries replaced cadmium with hydrogen-absorbing alloys and have higher energy density than NiCd with no toxicity. Lithium ion batteries have the highest energy density of any rechargeable battery due to lith
This document discusses different types of electrochemical cells and batteries. It describes the construction and working of common battery types like lead-acid, nickel-cadmium and lithium-ion batteries. Fuel cells are also introduced as electrochemical cells that convert chemical energy of fuels like hydrogen directly into electricity. Specific fuel cell types like Bischoff cell and hydrogen-oxygen fuel cell are explained. The document concludes by discussing applications of fuel cells in the automobile industry to power electric vehicles.
Group Design Project: Battery Pack for an Electric VehicleAnthony Man
This document summarizes the technical work on a battery pack for an urban concept vehicle. It details revisions made to the cell configuration and design specifications. Research was conducted on battery technologies and materials. A thermal simulation modeled temperatures during charging and discharging, concluding cooling is unnecessary during standard charging but required for fast charging. The designed battery pack has a mass of 5kg, cost of £920, and safety features like a BMS, switches, and isolated housing.
The document discusses different types of lithium-ion batteries that vary in their cathode materials. It provides the chemical names, abbreviations, and characteristics of six common lithium-ion batteries: lithium cobalt oxide (LiCoO2), lithium manganese oxide (LiMn2O4), lithium iron phosphate (LiFePO4), lithium nickel manganese cobalt oxide (LiNiMnCoO2), lithium nickel cobalt aluminum oxide (LiNiCoAlO2), and lithium titanate (Li4Ti5O12). Each battery type has different strengths and weaknesses in terms of specific energy, specific power, safety, temperature performance, lifespan, and cost. Lithium cobalt
A short course on being an Earned Value Management Control Account Manager. What is you role, to whom are you accountable, what does you CAM Notebook look like, what role does EVM play in your weekly management activities, what are the sources of information needed to manage the Control Account, what is your weekly and monthly business rhythm, a quick look at Risk Management, and what's beyond this short course?
The document discusses a conductive polymer binder developed at LBNL that can be used in silicon anode lithium-ion batteries. Silicon offers a much higher theoretical capacity than traditional graphite anodes, but its large volume changes during charging/discharging can lead to capacity fading. The novel binder is flexible and conductive, allowing it to tightly bind silicon nanoparticles and maintain electrical contact through the volume changes. This overcomes challenges facing silicon anodes and enables their use in applications like electric vehicles to significantly increase energy density. The technology has potential for commercialization and competition with other companies working on silicon anode solutions.
Nuclear batteries are devices that generate electricity from radioactive isotopes without using a chain reaction. They provide a long-lasting, compact power source as an alternative to chemical batteries that require frequent replacement. The document traces the historical development of nuclear batteries from their conception in 1950 and discusses different types including thermal and non-thermal converters. It covers considerations for radioactive fuels, advantages like longevity and efficiency, disadvantages like cost, and applications such as in pacemakers. In summary, the document provides an overview of nuclear batteries, their working principles, development over time, and potential uses as a long-life power source.
Device Modeling of Li-Ion battery MATLAB/Simulink ModelTsuyoshi Horigome
This document describes a MATLAB/Simulink model of a lithium-ion battery that simulates the battery's charge and discharge characteristics over time. The model accounts for parameters like battery capacity, state of charge, and number of cells. It can be used to simulate the battery's voltage over time during charging and discharging at different current rates. The document provides the model schematic, explains the modeling concepts, and shows examples of simulation results for charge time, discharge time, and voltage versus state of charge.
rechargable batteries and lead acid batteryTANISHQBAFNA
Lead-acid batteries were the first rechargeable battery invented in 1859. They work through chemical reactions between lead and lead dioxide electrodes and sulfuric acid electrolyte. Overcharging can produce explosive gases. Lead-acid batteries are used in many applications due to their low cost. Nickel-cadmium batteries were introduced in the 1960s and have higher energy density than lead-acid. They use cadmium and nickel oxide electrodes with an alkaline electrolyte but cadmium is toxic. Nickel metal hydride batteries replaced cadmium with hydrogen-absorbing alloys and have higher energy density than NiCd with no toxicity. Lithium ion batteries have the highest energy density of any rechargeable battery due to lith
This document discusses different types of electrochemical cells and batteries. It describes the construction and working of common battery types like lead-acid, nickel-cadmium and lithium-ion batteries. Fuel cells are also introduced as electrochemical cells that convert chemical energy of fuels like hydrogen directly into electricity. Specific fuel cell types like Bischoff cell and hydrogen-oxygen fuel cell are explained. The document concludes by discussing applications of fuel cells in the automobile industry to power electric vehicles.
Group Design Project: Battery Pack for an Electric VehicleAnthony Man
This document summarizes the technical work on a battery pack for an urban concept vehicle. It details revisions made to the cell configuration and design specifications. Research was conducted on battery technologies and materials. A thermal simulation modeled temperatures during charging and discharging, concluding cooling is unnecessary during standard charging but required for fast charging. The designed battery pack has a mass of 5kg, cost of £920, and safety features like a BMS, switches, and isolated housing.
The document discusses different types of lithium-ion batteries that vary in their cathode materials. It provides the chemical names, abbreviations, and characteristics of six common lithium-ion batteries: lithium cobalt oxide (LiCoO2), lithium manganese oxide (LiMn2O4), lithium iron phosphate (LiFePO4), lithium nickel manganese cobalt oxide (LiNiMnCoO2), lithium nickel cobalt aluminum oxide (LiNiCoAlO2), and lithium titanate (Li4Ti5O12). Each battery type has different strengths and weaknesses in terms of specific energy, specific power, safety, temperature performance, lifespan, and cost. Lithium cobalt
A short course on being an Earned Value Management Control Account Manager. What is you role, to whom are you accountable, what does you CAM Notebook look like, what role does EVM play in your weekly management activities, what are the sources of information needed to manage the Control Account, what is your weekly and monthly business rhythm, a quick look at Risk Management, and what's beyond this short course?
코딩테스트를 처음 공부하는 분들을 위한 강의 입니다.
★★아래 필수 확인(영상강의,저자소통방,저자카페 링크 있음)★★
유투브 강의 : https://youtu.be/wtBUKpXPN4Q?si=kNdmLgrpQm7xB-j_
저자카톡방 : https://open.kakao.com/o/gX0WnTCf
저자 카페 : https://cafe.naver.com/dremdeveloper
MS Project 교육 안내
피엠오피스의 MS Project 교육 과정은 단순히 MS Project의 사용법 교육에 그치지 않고, 교육 중 최적의 실제 프로젝트를 작성하고, 충분한 모범 사례 검토와 프로젝트 관리에 대한 체계적인 컨설팅을 제공해 드리고 있습니다. 국내에서 가장 오래 가장 많은 고객을 대상으로 충실하게 축적된 기업 프로젝트 관리 교육 및 컨설팅 경험을 바탕으로 철저하게 실무적으로 고객 맞춤형 교육을 제공해 드립니다.
문의 주시면, 자세한 제안서 및 MS Project의 활용 방안에 대한 안내 자료를 보내 드립니다.
MS Project 방문 교육 신청
■ 이메일 문의: nam@pmoffice.co.kr
■ 전화 문의: (02)532-8060, 010-2619-6442
상업적 이용 및 출처없는 무단전재를 금합니다.
애자일과 애자일 테스트 소개 (테스트기본교육 3장 2절)
애자일의 스크럼, XP에 대한 기본적인 소개와 스크럼 팀 안에서 테스트 역할자로써 사용자 스토리 리뷰, 테스트 설계, 짝 테스트, 테스트 자동화 등에 대한 내용을 사례 기반으로 소개하고 있습니다.
1) Define Our Own Agile:
시중에 나와 있는 애자일 관련 도구와 방법론들을 간략하게 살펴보고 이들을 관통하는 주요 특징과 컨셉을 이해한 후, 내가 속한 조직 환경에 맞는 애자일의 모습에 대해 고민하고 논의해 봅니다.
2) Personal Agile:
퍼스널 애자일(Personal Kanban)에 녹아 있는 TOC(Throughput Account, DBR, CCPM, 집중개선5단계)의 간단한 개념들에 대해 소개하고, 퍼스널 애자일 및 다이어리를 활용하여 개인 업무 관리 및 Agility를 향상시킬 수 있는 방법에 대해 논의해 봅니다.
- 애자일 선언문의 원칙들
- 애자일의 오해
- 스크럼(Scrum)
- User Story
- Estimation
- XP(eXtreme Programming)
- XP Practice #1 – TDD와 테스트 자동화
- XP Practice #2 – Refactoring, CI
- 애자일 사례 소개
코딩테스트를 처음 공부하는 분들을 위한 강의 입니다.
★★아래 필수 확인(영상강의,저자소통방,저자카페 링크 있음)★★
유투브 강의 : https://youtu.be/wtBUKpXPN4Q?si=kNdmLgrpQm7xB-j_
저자카톡방 : https://open.kakao.com/o/gX0WnTCf
저자 카페 : https://cafe.naver.com/dremdeveloper
MS Project 교육 안내
피엠오피스의 MS Project 교육 과정은 단순히 MS Project의 사용법 교육에 그치지 않고, 교육 중 최적의 실제 프로젝트를 작성하고, 충분한 모범 사례 검토와 프로젝트 관리에 대한 체계적인 컨설팅을 제공해 드리고 있습니다. 국내에서 가장 오래 가장 많은 고객을 대상으로 충실하게 축적된 기업 프로젝트 관리 교육 및 컨설팅 경험을 바탕으로 철저하게 실무적으로 고객 맞춤형 교육을 제공해 드립니다.
문의 주시면, 자세한 제안서 및 MS Project의 활용 방안에 대한 안내 자료를 보내 드립니다.
MS Project 방문 교육 신청
■ 이메일 문의: nam@pmoffice.co.kr
■ 전화 문의: (02)532-8060, 010-2619-6442
상업적 이용 및 출처없는 무단전재를 금합니다.
애자일과 애자일 테스트 소개 (테스트기본교육 3장 2절)
애자일의 스크럼, XP에 대한 기본적인 소개와 스크럼 팀 안에서 테스트 역할자로써 사용자 스토리 리뷰, 테스트 설계, 짝 테스트, 테스트 자동화 등에 대한 내용을 사례 기반으로 소개하고 있습니다.
1) Define Our Own Agile:
시중에 나와 있는 애자일 관련 도구와 방법론들을 간략하게 살펴보고 이들을 관통하는 주요 특징과 컨셉을 이해한 후, 내가 속한 조직 환경에 맞는 애자일의 모습에 대해 고민하고 논의해 봅니다.
2) Personal Agile:
퍼스널 애자일(Personal Kanban)에 녹아 있는 TOC(Throughput Account, DBR, CCPM, 집중개선5단계)의 간단한 개념들에 대해 소개하고, 퍼스널 애자일 및 다이어리를 활용하여 개인 업무 관리 및 Agility를 향상시킬 수 있는 방법에 대해 논의해 봅니다.
- 애자일 선언문의 원칙들
- 애자일의 오해
- 스크럼(Scrum)
- User Story
- Estimation
- XP(eXtreme Programming)
- XP Practice #1 – TDD와 테스트 자동화
- XP Practice #2 – Refactoring, CI
- 애자일 사례 소개
2. 강의 일정
2014-04-22
제1장. 작업관리의 개요
2
1주
2주
3주
4주
5주
6주
7주
8주
9주
10주
11주
12주
13주
14주
15주
생산성과 작업관리
작업관리 5단계 절차/ 디자인 개념의 문제해결 절차
공정분석
다중활동분석표
시설배치
학습곡선과 라인밸런싱
동작연구와 서어블릭/ 동작경제의 원칙
필름/ 비디오테이프분석
직무분석과 평가
작업측정/ 수행도평가/ 여유시간
표준자료법
워크샘플링
PTS/Work Factor/MTM
중간고사
기말고사
3. 3
작업관리(work study)란?
Work Study
Method Study
Work Measurement
Time Study
Motion Study
작업관리
방법연구
작업측정
시간연구
동작연구
어떤 작업을 수행하는 데에 사용되는 방법을 조사하여 효율을 향상시킨다.
작업 및 작업의 요소들의 수행에 필요한 시간을 결정한다.
작업 및 작업의 요소들의 수행에 필요한 동작을 결정한다.
작업을 조사하여 보다 효율적인 방법을 찾는다.
어떤 작업을 수행하는 작업자의 작업표준과 표준 시간을 결정한다.
2014-04-22
제1장. 작업관리의 개요
4. 4
1. 학습곡선
학습효과(Learning Effect)
반복된 작업 → 숙달 → 사이클 타임 단축
학습효과의 수학적 모델 : 학습곡선(Learning Curve)
관리기술의 개선
치공구 개선
작업방법 개선
디자인 변경
개선곡선(Improvement Curve)
생산추이함수
(Production Progress Function)
성과곡선(Performance Curve)
경험곡선(Experience Curve)
The He as Psychologist 1934.
He negative In productivity learning
5. 5
1. 학습곡선
학습효과와 학습곡선
생산량 2(배)
마다
누적평균생산시간 감소
(1-R)의 일정 비율 만큼
R : 학습률(Learning Rate)
작업 유형
R
비행기, 선박 조립
70~80%
용접
80~90%
선반
90~95%
학습률 80%의 의미
1개
1st. part
누적생산량
2개
2nd. part
4개
3rd. part
4th. part
2배
2배
생산품
100 Hr. (=누적평균생산시간)
누적평균생산시간 = 100 x 0.8 = 80 Hr.
누적평균생산시간 = 80 x 0.8 = 64 Hr.
누적평균생산시간
총생산시간
100 x 1 = 100 Hr.
80 x 2 = 160 Hr.
64 x 4 = 256 Hr.
7. 1. 학습곡선
평균시간모델(Average Time Model)
생산량이 2배로 증가핛 때마다 누적평균생산시간이 (1-R) 만큼 감소함을 보이는 모델
핚계시간모델(Marginal Time Model)
생산량이 2배로 증가하는 시점의 제품단위생산시간이 (1-R) 만큼 감소함을 나타낸 모델
yx : x개의 제품을 생산했을 때의 누적평균생산시간 a : 첫 번째 제품의 생산소요시간 m : 생산량이 2배로 증가핚 회수 x : 제품의 생산량 R : 학습률
zx : x개째 제품의 생산소요시간
a : 첫 번째 제품의 생산소요시간
m : 생산량이 2배로 증가핚 회수
x : 제품의 생산량
R : 학습률
수학적 모델
8. 1. 학습곡선
1개
1st. part
누적생산량
2개
2배↗ 1회
4개
2배↗ 2회
생산품
x=1, y1=aR0=a
x=2, y1=aR1
x=4, y1=aR2
누적평균생산시간
총생산시간
100 x 1 = 100 Hr.
80 x 2 = 160 Hr.
64 x 4 = 256 Hr.
m=0
m=1
m=2
when
1개
1st. part
누적생산량
2개
2배↗ 1회
4개
2배↗ 2회
생산품
x=1, y1=aR0=a
x=2, y1=aR1
x=4, y1=aR2
생산소요시간
생산소요시간
100 x 1 = 100 Hr.
100 x 0.8 = 80 Hr.
100 x 0.82 = 64 Hr.
m=0
m=1
m=2
when
9. 1. 학습곡선
평균시간모델(Average Time Model)
평균시간모델의 함수식
x개 생산에 필요핚 총생산시간
x번째 제품의 생산소요시간
핚계시간모델(Marginal Time Model)
핚계시간모델의 함수식
x개 생산에 필요핚 총생산시간
단위당 평균생산소요시간
10. 10
1. 학습곡선
학습곡선의 이용
Lot당 총생산시간 또는 제품 단위당 평균생산시간 계산 가능
단위당 생산비용 등 산출 가능
활용
비용분석
자체생산 또는 구매 선택 / 입찰가 산정
일정계획 수립
학습효과에 따라 생산량 증대 또는 인력 감축 가능
작업 수행도 분석
작업 성과 평가, 표준 작업 속도 도달 시기 예측