Developments in Battery Storage for PV

The rapid increase in the adoption of Solar Home Systems (SHS) in recent times hopes to ameliorate the global problem of energy poverty. The battery is a vital but usually the most expensive part of an SHS; owing to the least lifetime among other SHS components, it is also the first to fail. Estimating battery lifetime is a critical task for SHS design. However, it is also a complex task due to the reliance on experimental data or modelling cell level electrochemical phenomena for specific battery technologies and application use-case. Another challenge is that the existing electrochemical models are not application-specific to Solar Home Systems. This paper presents a practical, non-empirical battery lifetime estimation methodology specific to the application and the available candidate battery choices. An application-specific SHS simulation is carried out, and the battery activity is analyzed. A practical dynamic battery lifetime estimation method is introduced, which captures the fading capacity of the battery dynamically through every micro-cycle. This method was compared with an overall non-empirical battery lifetime estimation method, and the dynamic lifetime estimation method was found to be more conservative but practical. Cyclic ageing of the battery was thus quantified and the relative lifetimes of 4 battery technologies are compared, viz. Lead-acid gel, Flooded lead-acid, Nickel-Cadmium (NiCd), and Lithium Iron Phosphate (LiFePO4) battery. For the same SHS use-case, State-of-Health (SOH) estimations from an empirical model for LiFePO4 is compared with those obtained from the described methodology, and the results are found to be within 2.8%. The relevance of this work in an SHS application is demonstrated through a delicate balance between battery sizing and lifetime. Based on the intended application and battery manufacturer’s data, the practical methodology described in this paper can potentially help SHS designers in estimating battery lifetimes and therefore making optimal SHS design choices.

Several safety standards for information and communication technology (ICT) equipment installed outdoors have recently been updated to better ensure that those equipment housing lead-acid or nickel-cadmium (NiCd) batteries are well ventilated and do not pose a risk of explosion of combustible gases. New procedures in IEC 62368-1, IEC 60950-22, Second Edition, and Telcordia Standard GR-487-CORE, Issue 4 have been developed to reduce the risk of explosion due to compromised or inadequate ventilation. These procedures apply to both lead-acid and NiCd battery technologies, each known for producing explosive gas as a byproduct of electrolysis. This paper provides a review of lead-acid and NiCd battery technology, then compares these new safety requirements intended for assuring adequate ventilation to previous requirements.

Nickel-based rechargeable batteries

SECONDARY BATTERIES – NICKEL SYSTEMS | Electrodes: Nickel

With the development of Chinese industrial technique, electronic products tend to be small sized and portable. So it required batteries to be miniature, light weight, with high energy capacity and long service life. China had achieved great progress in electrochemical power sources industry in the last ten years. Especially, there is an ceaseless developing trend in the rechargeable battery field. Chinese chemical power source investigators had done a great deal of work on lead-acid, nickel-iron, nickel-cadmium (Ni-Cd), nickel-metal hydride (Ni-MH) and lithium ion batteries, among which, lead-acid, nickel-iron, nickel-cadmium and nickel-metal hydride batteries are produced in commercial scale. And some hopeful results were also achieved on rechargeable lithium batteries and lithium ion batteries. In this article we concentrate on the introduction of the research, development and manufacture status of nickel-cadmium and nickel-metal hydride batteries, hoping that this paper will give a deeper understanding in the field of Chinese rechargeable batteries.

The battery is the primary energy source to be monitored in electric vehicles and their healthy operation. This study analyzes the parameters of lead acid battery. Since Lead Acid (LA) is less efficient than lithium-ion, Lead acid is preferred in power storage systems for its large current capability, cost efficiency and convenience usage. Lead acid batteries are widely used in power storage devices like UPS grid-scale power systems. This paper explains about the battery monitoring system of lead acid in real time aspects. Also, to monitor the discharging rate of lead acid batteries and accomplish self-discharging if needed. Batteries lifetime depends on both charging and discharging. So self-discharging is proposed in this paper to increase the lifetime of battery. SOC and SOD estimation is simulated by using MATLAB Simulink. In addition to this, the development of microcontroller programming for lead acid battery life is performed. Thus, the lifetime of battery can be extended. Here the proposed solution will not only increase the life span but also increases the efficiency of the battery and its operation. The SOC estimation is done using Extended Kalman Filter (EKF) method which is advanced to Coulomb’s counting method. By comparing and using these techniques, the efficient values are plotted and used for analysis. Thus, this paper focuses only on the simulation of the main parameters involved in the battery monitoring system.

전지는 공기아연리튬망간산화은나트륨-유황납축니켈-수소 이차니켈-카드뮴리튬이온알칼라인 전지 등의 여러 종류가 있다. 경제적, 효율적 관점에서 폐전지의 재활용 기술은 폭넓게 연구되어 왔다. 본 연구에서는 폐전지의 재활용 기술에 대한 특허와 논문을 분석하였다. 분석범위는 1972년~2011년까지의 미국, EU, 일본, 한국의 등록/개된 특허와 SCI 논문으로 제한하였다. 특허와 논문은 키워드를 사용하여 수집하였고, 기술의 정의에 의해 필터링하였다. 특허와 논문의 동향은 연도, 국가, 기업, 기술에 따라 분석하여 나타내었다. There are several kinds of batteries such as zinc-air battery, lithium battery, Manganese dry battery, silver oxide battery, sodium-sulphur battery, lead acid battery, metal hydride secondary battery, nickel-cadmium battery, lithium ion battery, alkaline battery, etc. These days it has been widely studied for the recycling technologies of the used battery from view points of economy and efficiency. In this paper, patents and published papers on the recycling technologies of the used battery were analyzed. The range of search was limited in the open patents of USA (US), European Union (EU), Japan (JP), Korea (KR) and SCI journal articles from 1972 to 2011. Patents and journal articles were collected using key-words searching and filtered by filtering criteria. The trends of the patents and journal articles were analyzed by the years, countries, companies, and technologies.

Recent trends in the applications of batteries in the built environment are improving the efficiency of batteries and lowering costs. This paper introduces various types of battery technologies such as sodium sulfur, lithium ion, flow and lead acid batteries and discusses their models. Various applications of batteries such as adaptive battery systems, Battery Electrical Vehicles (BEVs), Battery Energy Storage Systems (BESS), the Internet of Things (IoT), and Smart Grid and Smart Environment applications are also discussed. In their selection and use of batteries, scholars are ultimately looking to maximize occupant comfort whilst keeping costs low and optimizing the energy efficiency of buildings. This paper will provide a review of current trends in this field.

Comparative study on charge controller techniques for solar PV system

<div class="htmlview paragraph">Nickel-cadmium batteries fill a great need in the aircraft industry today. This battery is far superior to its predecessor, the lead-acid battery, in its ability to provide power for larger electrical loads and/or loads sustained for long periods. Yet, aircraft operators have experienced many unexpected problems with this battery. These problems can be greatly reduced, if not eliminated, through a better understanding by the design engineer of the battery's construction, abilities, and limitations. Further improvements in performance can be accomplished by the aircraft operator through constant and proper maintenance.</div>

Properties of large Li ion cells using a nickel based mixed oxide

This paper presents design and analysis of Multi-output Portable Universal Power Supply Kit (EPS Kit). This EPS Kit is intended as an alternative power supply kit to reduce the issue of a power outage. Lead Acid Battery which is considered one of the easiest sources that can be found during an emergency state is the best alternative energy source. The EPS Kit is designed to store the power in Lead Acid Battery as the main source and powered by the solar energy as the secondary source and will be providing both standard household alternating current (AC) and most common direct current (DC) power. This Kit is a stand-alone system comes with plug-and-use kit in which the system can be recharged using solar and AC power. The plug-and-use kit is equipped with intelligent multi-USB ports, adjustable dual mode NiCd, Ni-Mh, and Li-Ion battery which are Discharge/Charger mode, AC output port, LED lamp, and emergency electrical accessories. EPS Kit is also portable which installed with wheel and handle for mobility application. Production of EPS Kit is involved software and hardware. The software used are 3D CAD design software and circuit simulation software respectively for preliminary 3D drawing design and output circuit validation. Experimental results of the EPS Kit load testing, charging and discharging state are conducted in order to demonstrate the EPS Kit functionality and usage.

Battery selection remains an up-to-date engineering problem for hybrid and electric vehicle manufacturers. Type of battery and its capacity will depend on the trip and vehicle parameters. An electric vehicle produced with the ideal bat-tery type will undoubtedly be preferred by customers. Data collected from black boxes of trolleybuses operated by Malatya Metropolitan Municipality were used in this study. The real road and driver characteristics were included in the study with the experimentally obtained data. These data are the accelerator pedal data obtained from vehicles driven by different drivers in regular and congested traf-fic hours. In this study, four different battery chemistries were run separately on a hybrid vehicle model and analyzed. Chosen battery chemistries are the most commonly used by manufacturers. These are Lead Acid, Nickel Cadmium, Nickel Metal Hydride and Lithium Iron Phosphate batteries. The results of the study are presented in detail comparatively. Among the battery chemistries, Lithium iron phosphate is observed to be the most ideal battery type for hybrid electric vehi-cles.

Chapter 9 - Rechargeable Batteries and Their Management

In the developing world artisanal fishermen use kerosene lanterns for night fishing. Solar powered fishing lights became an ecologic and economic alternative to the kerosene lanterns due to the development of high efficiency LED light sources and low price solar cells. In the last years several solar fishing light systems were developed. The choice of the battery technology influences the reliability and the operating cost of the fishing light, because the battery has the lowest lifetime of all components of the fishing light.In this paper we describe the results of a battery simulation over 5 years time: The battery is daily charged by a solar module and discharged by night fishing. The meteorological irradiation data of Tanzania are used. Different battery technologies (Lead Acid, Lithium-Ion, Lithium-Iron-Phosphate) are tried out.The results of the simulation are the battery lifetime, cost and waste mass per year dependent on the battery technology. The study shows, that the Lithium-Iron-Phosphate technology is the best choice in terms of these factors and to the advantage of the poverty-stricken fishermen at the Victoria Lake in Tanzania and the environment.