scholarly journals Performance Matrix Analysis Method of Power Battery System Based on Multi-Parameters’ Model

2020 ◽  
Vol 18 (2) ◽  
Author(s):  
You Xu ◽  
Jing Wu ◽  
Wei Xu ◽  
Guiping Li ◽  
Qun Gao
Keyword(s):  
State Space ◽  
The State ◽  
Matrix Analysis ◽  
System Safety ◽  
Battery System ◽  
Power Battery ◽  
Performance Matrix ◽  
New Energy ◽  
The Status ◽  
New Energy Vehicles

Abstract Power battery system is widely used in new energy vehicles. The performance of power battery directly affects the safety of new energy vehicles. At present, the research of battery system safety focuses on specific parameters such as the status of charge (SoC), the state of health (SoH), and so on. However, a single performance evaluation may lead to some defects in system safety. The influences on the power battery system of SoC, SoH, and the status of consistency, which are essential factors in battery system safety were analyzed in this study. In view of the conclusion of the analysis result, the concept of the power battery system performance matrix, which includes the parameters of SoC, SoH, the status of consistency and temperature, was proposed. The state-space expression was studied and used for the expression of the performance matrix. Cyclic charging and discharging experiments of Lithium-ion batteries were carried out, and the result showed that the performance matrix based on state-space could describe the dynamic changes of battery system status. It was sufficient for the estimate of the battery system’s safety status, and it can provide the effective and reliable data resources for the system maintenance.

Development Status and Trend of New Energy Vehicles in China

2021 ◽  
Vol 1 (1) ◽  
pp. 10-15
Author(s):  
Sijin Ma ◽  
Jiahao Mai ◽  
Wanling Wang ◽  
Kemeng Yao ◽  
Deyu Li
Keyword(s):  
Energy Conservation ◽  
Market Share ◽  
Emission Reduction ◽  
The State ◽  
Competitive Environment ◽  
Sales Volume ◽  
Development Status ◽  
Online Consumers ◽  
New Energy ◽  
New Energy Vehicles

Under the background of energy conservation and emission reduction advocated by the state, the sales volume of new energy vehicles increased rapidly and reached new highs in 2021. However, many domestic new energy vehicles still face the problems of serious homogenization and low market share. In view of this situation, we mine and capture the data of online consumers and potential consumers, analyze consumers' preferences in combination with the knowledge learned, take Shenzhen BYD Co., Ltd. as an example, analyze its competitive environment, and finally put forward feasible suggestions.

Criteria for classifying general Markov chains

1976 ◽  
Vol 8 (04) ◽  
pp. 737-771 ◽  
Author(s):  
R. L. Tweedie
Keyword(s):  
Markov Chain ◽  
Markov Chains ◽  
State Space ◽  
The State ◽  
General State ◽  
Classical Work ◽  
The Status ◽  
General State Space

The aim of this paper is to present a comprehensive set of criteria for classifying as recurrent, transient, null or positive the sets visited by a general state space Markov chain. When the chain is irreducible in some sense, these then provide criteria for classifying the chain itself, provided the sets considered actually reflect the status of the chain as a whole. The first part of the paper is concerned with the connections between various definitions of recurrence, transience, nullity and positivity for sets and for irreducible chains; here we also elaborate the idea of status sets for irreducible chains. In the second part we give our criteria for classifying sets. When the state space is countable, our results for recurrence, transience and positivity reduce to the classical work of Foster (1953); for continuous-valued chains they extend results of Lamperti (1960), (1963); for general spaces the positivity and recurrence criteria strengthen those of Tweedie (1975b).

scholarly journals Research on Online Insulation Testing of Power Battery of New Energy Vehicles

2021 ◽  
Vol 10 (01) ◽  
pp. 001-005
Author(s):  
Yuan Xu ◽  
Huazhang Wang ◽  
Jiacheng Li
Keyword(s):  
Detection System ◽  
Experimental Results ◽  
Normal Operation ◽  
Python Language ◽  
Power Battery ◽  
New Energy ◽  
Injection Type ◽  
New Energy Vehicle ◽  
Insulation Performance ◽  
New Energy Vehicles

The insulation performance of new energy vehicles is an important factor in the normal operation of vehicles. This paper designs a voltage injection-type insulation detection based on the traditional detection.Based on the python language combined with the library provided by NI-visa, it can achieve high integration and meet the national GB/T 18384.1-2015 standard. Experimental results show that the insulation detection system can accurately test the insulation performance of new energy vehicles and meet the new energy vehicle offline detection standards.

scholarly journals Characteristics Numerical Research on Power Battery Impact Strength of New Energy Vehicle

2019 ◽  
Vol 16 (08) ◽  
pp. 1950042
Author(s):  
Zhuhai Tao ◽  
Yang Jialin ◽  
Zhang Xianglei ◽  
Zhang Bing
Keyword(s):  
Impact Strength ◽  
Crash Test ◽  
Test Conditions ◽  
Power Battery ◽  
Average Impact ◽  
New Energy ◽  
Strength Curve ◽  
New Energy Vehicle ◽  
The Impact ◽  
New Energy Vehicles

Based on the crash test of new energy vehicles, the mechanical response data of power batteries during the collision process were collected, and the average impact strength curve of power batteries of typical new energy vehicles in China was obtained. The average impact strength curve was mathematically processed to obtain the impact strength characteristic value and tolerance by using the equivalent trapezoidal wave and the least square method, thereby determining the test conditions of the dynamic strength of the domestic new energy vehicle power battery. The differences are analyzed by comparing with ISO 12405-3 test conditions, which provides an important reference for the revision of power battery test standards in the future.

scholarly journals Economic research and suggestions on the recycling of waste power batteries for China’s new energy vehicles

2020 ◽  
Vol 165 ◽  
pp. 01028
Author(s):  
Li Zhenbiao ◽  
Li Yuke ◽  
Pan Wei ◽  
Wang Jia
Keyword(s):  
Economic Research ◽  
Hydrometallurgical Process ◽  
Analysis Model ◽  
Rare Metals ◽  
Recycling Industry ◽  
Battery Recycling ◽  
Power Battery ◽  
New Energy ◽  
The Cost ◽  
New Energy Vehicles

With the rapid promotion of the number of China’s new energy vehicles in promotion and application, it is of great significance to ensure the recycling of the waste power batteries. It can not only effectively reduce the safety and environmental protection risks brought by the waste power battery, but also alleviate China’s dependence on rare metals such as cobalt and lithium, which has been widely concerned by the industry. In this paper, the cost analysis model of waste power battery treated by hydrometallurgical process is established, and the economy of recycling of ternary material battery and LFP battery is compared and analysed, and the overall economy of the whole power battery recycling industry is analysed, and the relevant conclusions are obtained, and the relevant suggestions of recycling of power battery are put forward according to the analysis results, to provide reference for industry and related management departments.

Suggestions on Speeding up Recycling of Power Battery for New Energy Vehicles in China

2018 ◽  
Vol 20 (1) ◽  
pp. 144
Author(s):  
Shijia Zhao ◽  
Nan Xu ◽  
Yingjun Qiao ◽  
Bo Yang
Keyword(s):  
Power Battery ◽  
New Energy ◽  
New Energy Vehicles

scholarly journals Analysis and Future Market Forecast Research of China’s End-of-life New Energy Vehicle Recycling and Dismantling Technology

2020 ◽  
Vol 165 ◽  
pp. 01033
Author(s):  
Wang Jia ◽  
Li Yuke ◽  
Pan Wei ◽  
Li Zhenbiao
Keyword(s):  
End Of Life ◽  
Future Development ◽  
Future Market ◽  
Power Battery ◽  
The Future ◽  
New Energy ◽  
Market Forecast ◽  
New Energy Vehicle ◽  
Application Volume ◽  
New Energy Vehicles

With the rapid increase in the promotion and application volume of new energy vehicles in China, the number of end-of-life new energy vehicles will increase rapidly in the future. Moreover, it brings difficulties to the dismantling of new energy vehicles because of the flammability and explosiveness characteristics of the power battery in new energy vehicles. This paper analyzes the dismantling technology of end-of-life new energy vehicles in China and abroad, and forecasts the inventory of new energy vehicles and the number of end-of-life new energy vehicle in the future, which has important reference significance for the future development of China’s industry. Finally, the paper puts forward suggestions to promote the development of the industry.

scholarly journals Research and Design of Reverse Logistics Network of Used Power Battery Based on Heuristic Algorithm

2021 ◽  
Vol 275 ◽  
pp. 03055
Author(s):  
Longyu He
Keyword(s):  
Heuristic Algorithm ◽  
Reverse Logistics ◽  
Two Stage ◽  
Logistics Network ◽  
Operating Modes ◽  
Power Battery ◽  
Reverse Logistics Network ◽  
New Energy ◽  
Research And Design ◽  
New Energy Vehicles

This paper starts with the rapidity of new energy vehicles and the hazards of power battery disposal, and puts forward the importance of the construction of a reverse logistics network for used power batteries, and then analyzes the characteristics and operating modes of the reverse logistics network. Based on the results of the analysis, a heuristic is proposed. The algorithm uses a two-stage algorithm to solve the problem of waste reverse logistics location-transportation, and proposes the design and construction of a reverse logistics network for waste power batteries, so that the recycling of waste power batteries can be better carried out.

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