Power & Energy Solutions

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由香港中文大学(中大)机械与自动化工程学系副教授卢怡君教授领导的研究团队最近为水系锂离子电池研究了一款新型的电解液,它的材料成本低且不易燃、毒性低、相对环保,更重要的是新型电解液应用到电池中能提供稳定的电压作日常使用,朝改善水系锂离子电池的性能迈进了一大步。研究结果已刊登于国际期刊《自然材料》。 锂离子电池的未来:从易燃有机液到安全水系 全球的经济以及人类的日常生活一直依赖着各类型电子设备,例如手机和笔记本电脑等等,而锂离子电池因为能提供相对稳定的能量,而且可以再充电重复使用,成为了这些可充电式电子产品的核心要素。然而,制造锂离子电池的主要材料之一是有机电解液,即使经过多年改良,这些电解液仍然含有毒性及高度易燃,有机会引发严重的安全问题 — 早年三星Note7手机爆炸、锂离子电池在波音公司787新型客机起火等事故就是其中的例子。 科学界近年深入研究以水系电解液取代传统有机电解液,因水的特质可解决易燃问题。然而,水系锂离子电池一直有个弊病,就是其电池电压和能量密度受到水电解限制。当电压高于1.23伏特,电解液中的水分子便会分解为氢气及氧气,大大影响电池运作及电压输出。增加水系电池电压的新兴做法是利用高浓度锂盐(每公斤21至55摩尔)制造人工固体电极介面及减少自由水含量,以改善水的稳定性,然而这个方法引起了对成本和毒性的忧虑。

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单晶硅棒和多晶硅块的等级判定(以下简称“判定”)一直是光伏产业上游供应商最关心的问题之一。由于两种材料的生产工艺不同,它们的判定方法也有差别。 1.单晶硅棒的判定方法 对于单晶硅棒来说,业内的传统判定方法涉及多个步骤:先从硅棒头尾部切下厚晶圆,经热氧和化学腐蚀等处理步骤后,由操作员观察厚晶圆上是否有滑移线。如果有,还需继续向内切片;如果没有,也需要根据经验判断还需切除多少来让剩余部分不含任何黑边、黑环和黑心。这些都直接影响材料的最终电池效率。但是,这个方法检查一片厚晶圆不仅非常耗时,还很依赖操作员的个人经验。 为了缩短判断时间,部分生产商转而使用红外设备来纵向扫描整根硅棒,检测滑移线的位置。每根硅棒最快只需5分钟即可确定含有滑移线的部分。接下来,操作员可根据结果来切除硅棒的废料部分。但是,红外设备无法检测黑边、黑环和黑心等缺陷,因此操作员仍需根据经验向内切割。随之而来的问题是,切多少可以确保完全去除废料,并且不浪费优质部分呢? 近年来快速兴起的光致发光(PL)成像技术给这个问题带来了及时的解决方案。PL是材料吸收光子后的光辐射。 在光伏硅基材料上应用这个原理,带来了PL成像检测技术:使用模拟太阳光照射硅片或电池片,并用专用的PL镜头来获得样本的PL成像。

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CalLab PV Modules of the Fraunhofer Institute for Solar Energy Systems ISE has been re-accredited by the German Accreditation Body (DAkkS) as an independent calibration laboratory according to the new standard DIN EN ISO/IEC 17025: 2018. The laboratory reached a record measurement uncertainty of 1.1 percent in the calibration of photovoltaic modules. The measurement reproducibility has only 0.2 percent deviation. Measurement uncertainty is a decisive factor for both quality assurance in module production and for investments in PV power plants. Module manufacturers who guarantee a sold power of their products can reduce the tolerances in their data sheet specifications by using more precisely calibrated reference modules. This involves considerable output and costs, given production volumes on a gigawatt scale. Investors also benefit from reduced measurement uncertainties in module characterization, since simulations of PV power plant yields and thus the calculation of returns becomes more accurate. "With a global module production of around 100 GW, one percent measurement uncertainty corresponds to one gigawatt of output uncertainty. At today's prices this amounts to around €300 million. High precision pays off for both suppliers and customers," explains Dr. Harry Wirth, division director for Photovoltaic Modules and Power Plants at Fraunhofer ISE. During re-accreditation of

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New polling released today by the government is highlighting the public’s strong support for renewable energy to boost the economy. The poll shows that a record 76% of people agree that renewable energy industries and developments provide economic benefits to the UK. Only 4% disagreed. Meanwhile, support for non-renewable and fossil fuel technologies hit new levels of opposition. Only 32% of the public supported nuclear energy while shale gas, or ‘fracking’, also hit a high of 45% opposed. Juliet Davenport, CEO and Founder, Good Energy, said: "As we start to look beyond the coronavirus, we need to be stronger and bolder than ever on renewable energy and climate change. The recovery package should be a catalyst for a clean, green future and a chance to leave our fossil fuel dependence in the past. People now know that there is an alternative, they do not have to tolerate toxic air pollution as the trade-off for keeping our economy going. We urge the government to act now to protect nature and future generations from climate catastrophe.” The public is also anxious about the impact of climate change with 76% saying they were either very concerned or fairly concerned about the crisis. In addition: 68% think climate change is already having an impact

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On 22 July 2019, Meyer Burger Technology Ltd (SIX Swiss Exchange: MBTN) announced that it had signed a framework agreement with a North American-based solar cell manufacturing start-up company relating to Meyer Burger's heterojunction (HJT) core equipment for the production of solar cells. Pursuant to this framework agreement, the placing of orders is subject to the successful completion of a financing round by the start-up company. On 4 November 2019 and 13 February 2020, Meyer Burger announced that the placing of orders was being delayed. The start-up company informed Meyer Burger that it does no longer intend to place orders in accordance with the framework agreement and has given Meyer Burger formal notice of termination with immediate effect with respect to the framework agreement.

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The leading minds of SecurEnergy GmbH, Photon Energy Solar GmbH and IWE group bundle their know-how having founded securenergy solutions AG, which will focus on ground-mounted photovoltaic systems within Germany. After several years of successful cooperation, SecurEnergy GmbH from Berlin, Photon Energy Solar GmbH, and IWE group from Denmark combine their common expertise. Therefore, the shareholders and managing directors Holger Stabernack (SecurEnergy GmbH), Karsten Becker (Photon Energy Solar GmbH) and Casper Rasmussen (IWE group) have founded securenergy solutions AG. From now on, the entrepreneurs will cooperate even more closely and focus on planning and realisation of utility-scale photovoltaic systems in Germany. The projects are managed from the Berlin headquarters. About Holger Stabernack, SecurEnergy GmbH Think economically - act ecologically. This is how SecurEnergy GmbH summarizes its basic intention. Since 2015 the company is successfully managing the entire solar project pipeline, starting with acquisition of open-site and rooftop systems, through planning and construction, and the turnkey handover of the photovoltaic system to the investors. Led by Holger Stabernack from Berlin, the company has installed modules with a total output of over 60 megawatts on over 250 roofs so far. “By building large-scale photovoltaic systems we want to actively increase our contribution to environmental protection. With

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A new innovation call seeking a solution to increase the physical separation of technicians in the  confined spaces of offshore crew transfer vessels (CTVs) during the COVID-19 pandemic has launched today (Thursday 7 May), aimed at improving the safety of personnel required to continue to travel to undertake wind farm inspection, maintenance and repair. Social distancing measures due to COVID-19 are forcing some operators to limit CTV operations to a maximum of four passengers, a considerable reduction from the usual 12 or 24. This impacts the amount of work that can be undertaken on a wind farm, affecting jobs and ultimately energy production. In response, ORE Catapult’s O&M Centre of Excellence is working with the Knowledge Transfer Network (KTN), offshore wind health and safety group  G+ and the Workboat Association to set up a cross-sector CTV innovation challenge in search of a rapid solution, such as a partition, that can be deployed onboard the vessels and allow an increase in passenger and crew numbers. The challenge was identified by members of the Operational Contingency initiative, established by ORE Catapult’s O&M Centre of Excellence in response to the Covid-19 crisis. COVID-19 is creating unprecedented challenges for the global offshore wind industry, and this initiative

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Berlin, 7 May 2020: Off-grid solar module manufacturer OPES Solutions is expanding its commitment to the use of solar technology in safety-related applications. In addition to panels for smart lighting solutions and traffic sensors, the company supplies integrated solar technology for maritime safety ladders made by the Danish manufacturer Port-Safety. The patented “LifeLadder” is an innovative safety feature for quay walls and is currently installed in the industrial ports, city wharfs, and marinas of more than 22 countries worldwide. The ladders make harbor fronts  safer by addressing two major issues: visibility and maintenance. Made of reinforced synthetic modules, the ladders are non-corrosive, maintenance-free and have already proven their worth in harsh maritime environments. LifeLadder’s bright-yellow modules make them highly visible in the daytime, while solar-powered LED lights illuminate them at night and thus providing a clear “signpost” to safety. Mostly unlit, traditional quay wall ladders are barely visible at night and difficult to find in an emergency. The LED lighting significantly increases LifeLadder’s safety performance, even during normal operation. Solar energy supply even in the far north “The LifeLadder is a good example of how solar power makes new functions possible in products and applications that were previously hardly feasible,” says Robert Händel,

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Revolutionary design enables safer and faster boom lifts in tight spaces Fabrication of the erection frame for Mammoet’s Focus 30 is complete - bringing the crane one step closer to reality. This frame allows the boom to be constructed vertically in sections, making it easier and safer to deploy on packed petrochemical and construction sites. Machining and welding of the main steelwork has finished, with dimensional control now being performed to ensure compliance and interconnectivity. The frame has been constructed in six pieces, which will be dismantled and transported to Mammoet’s Westdorpe facility; where preparations are well underway for final assembly. Measuring 30m long, 12m wide and weighing in at 160t, the frame is the largest single-piece item being fabricated for the Focus 30. In fact, its complete erection system weighs in at more than 180t once other parts are taken into consideration - such as the climb frame and skid beam. Its role in the crane’s design is similarly large. By supporting boom sections vertically, it helps to reduce the space required for the crane’s construction, while making sure none of this work takes place over surrounding crucial infrastructure. Work started on the erection frame back in November 2019 at PTS Machinery; a heavy

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As EV adoption rates and manufacturing capacity increase, new innovations are emerging to drive the EV battery technology market forward May 7, 2020 – Boulder, Colo. – A new report from Guidehouse Insights examines the market trends, drivers, and barriers of electric vehicle batteries (EVBs), providing global forecasts for light duty (LD) passenger EVs, medium duty (MD) and heavy duty (HD) trucks, and MD and HD buses, through 2030. Advances in battery technology to increase energy density, widespread commercialization of HD EVs such as trucks and buses, and sustainable and efficient methods for sourcing and handling raw materials all contribute to a growing EVB market. Challenges to the market include cost and technology limitations, which remain priority concerns for consumers and automakers, but are expected to make headway during the next decade. Click to tweet: According to a new report from Guidehouse Insights, battery pack prices across all vehicle classes and powertrains are expected to experience declines by 2030, with the biggest declines observed in LD battery EVs (8.3% annual decrease) followed by LD plug-in hybrid EVs (8.1% decrease). “As EV adoption rates and manufacturing capacity increase, new innovations are emerging that are expected to drive the EVB technology market in the coming

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