{"id":181110,"date":"2021-08-12T07:08:24","date_gmt":"2021-08-12T07:08:24","guid":{"rendered":"http:\/\/facfox.com\/news\/?p=181110"},"modified":"2021-06-25T07:39:19","modified_gmt":"2021-06-25T07:39:19","slug":"voxeljet-develops-new-cooling-system-for-ethec-city-electric-motorcycle","status":"publish","type":"post","link":"https:\/\/facfox.com\/news\/voxeljet-develops-new-cooling-system-for-ethec-city-electric-motorcycle\/","title":{"rendered":"Voxeljet Develops New Cooling System for Ethec City Electric Motorcycle"},"content":{"rendered":"<p>A novel cooling system in the Ethec City electric motorcycle ensures a longer service life for the battery cells. In order to introduce the students to manufacturing processes that can be used for series production outside of prototype manufacturing, Voxeljet produced the mold for the innovative battery housing of the prototype using the binder jetting process. A student focus project at ETH Zurich is realizing prototypes of a new type of cooling system with support from Voxeljet.<\/p>\n<p>Science fiction films tend to take for granted the limitations of battery technology. In 2021, high speed and long-range e-mobility are practically always associated with extremely heavy and voluminous <a href=\"https:\/\/facfox.com\/news\/topics\/energy\" target=\"_blank\" rel=\"noopener\">energy<\/a> storage systems. Cars and trucks may already offer the necessary space, but the <a href=\"https:\/\/facfox.com\/news\/topics\/art\" target=\"_blank\" rel=\"noopener\">art<\/a> of engineering still has a few hurdles to overcome on the way to a climate-friendly e-motorbike. The comparatively powerful e-motorcycles already available on the market are more suitable for urban traffic than for extended cross-country trips due to a lack of battery capacity.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/img.facfox.com\/imgs\/2021\/06\/768902ffc13ac0ab.png\" \/><\/p>\n<p>The technological approach of the Ethec City project could change that. Ethec stands for \u201cETH Electric Cruiser\u201d the concept of an electric motorcycle developed by students at the Swiss Federal Institute of Technology in Zurich. Within the framework of \u201cfocus projects\u201d, ETH students are given the opportunity to implement their theoretically acquired knowledge in real technologies.<\/p>\n<p>The project sponsor is AG Inspire, a strategic p<a href=\"https:\/\/facfox.com\/news\/topics\/art\" target=\"_blank\" rel=\"noopener\">art<\/a>ner of the university that accompanies the technology transfer of research results into practical <a href=\"https:\/\/facfox.com\/news\/topics\/insights\/applications\" target=\"_blank\" rel=\"noopener\">application<\/a>s. In the Ethec project, which st<a href=\"https:\/\/facfox.com\/news\/topics\/art\" target=\"_blank\" rel=\"noopener\">art<\/a>ed in 2017, the aim was to significantly increase the efficiency of e-motorcycles via the recovery of braking <a href=\"https:\/\/facfox.com\/news\/topics\/energy\" target=\"_blank\" rel=\"noopener\">energy<\/a> and a modified battery design. At the same time, the team of <a href=\"https:\/\/facfox.com\/news\/topics\/mechanics\" target=\"_blank\" rel=\"noopener\">mechanic<\/a>al engineering students, prospective electrical engineers and future industrial designers had to decide which processes would be most suitable for manufacturing the required components in each case. Since the initial focus was on a prototype, <a href=\"https:\/\/facfox.com\/service\/3d-printing-service\" target=\"_blank\" rel=\"noopener\">3D print<\/a><a href=\"https:\/\/facfox.com\/service\/3d-printing-service\" target=\"_blank\" rel=\"noopener\">ing<\/a> was the main focus of attention.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/img.facfox.com\/imgs\/2021\/06\/e5b91e107dafecfb.png\" \/><\/p>\n<p>The Swiss inventors implemented recuperation, i.e. the recovery of braking <a href=\"https:\/\/facfox.com\/news\/topics\/energy\" target=\"_blank\" rel=\"noopener\">energy<\/a>, by installing a wheel hub motor in the front wheel of the bike. The question, of how to best store the additional power available to increase the range, proved to be much more difficult. Creating a high <a href=\"https:\/\/facfox.com\/news\/topics\/energy\" target=\"_blank\" rel=\"noopener\">energy<\/a> density in the smallest possible space is one thing. However, keeping the heat generated during battery operation at a constant level is more difficult on a motorcycle than in a larger <a href=\"https:\/\/facfox.com\/news\/topics\/automotive\" target=\"_blank\" rel=\"noopener\">vehicle<\/a> and optimum temperature management is crucial for the service life of the battery.<\/p>\n<div style=\"background-color: #eaeaea7a; padding: 15px 30px; overflow-wrap: break-word; display: flex; align-items: center; border-radius: 4px; box-shadow: -1px 4px 20px 0px #dedede; margin-top: 1em; margin-bottom: 1em;\">\n<div style=\"flex: 1; padding-right: 30px;\">\n<h4 style=\"margin-bottom: 14px;\">Manufacturing on Demand<\/h4>\n<div style=\"display: block;\">Order custom parts through our online manufacturing network. Low cost, fast delivery. Upload your design for free quotes now!<\/div>\n<\/div>\n<p><a style=\"background-color: #0baee8; color: white; padding: 10px 20px; border-radius: 4px;\" href=\"https:\/\/facfox.com\" target=\"_self\" rel=\"noopener noreferrer\"><i class=\"fa-fw auxicon auxicon-cloud-upload\" aria-hidden=\"true\"><\/i> Get Quote<\/a><\/p>\n<\/div>\n<p>\u201cBattery cooling in e-<a href=\"https:\/\/facfox.com\/news\/topics\/automotive\" target=\"_blank\" rel=\"noopener\">vehicle<\/a>s is normally accomplished with a coolant that flows past the cells through a hose or pipe,\u201d explained Dr. Josef Mayr, Group Manager Thermal Simulation at inspiring AG and coordinator of the Ethec project. \u201cThe disadvantage of this method is that only spot or linear contact is made and direct contact with the cells is not actually achieved.\u201d In view of the limited space in the middle of the motorcycle frame, only one concept was ultimately possible: complete embedding of all battery cells in a bath of oil.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/img.facfox.com\/imgs\/2021\/06\/34a127183062272e.png\" \/><\/p>\n<p>The Ethec team used the cooling system of transformers in the substations of the major power grids as a template. \u201cSparks fly when the equipment is switched on,\u201d said Mayr, \u201cbut because the units are completely swimming in silicone oil and thus there is no oxygen, there can be no short circuit.\u201d<\/p>\n<p>Split between two modules, the ETH students assembled a total of 1,269 lithium-ion round cells with a total output of 15 kWh. Computer-aided flow simulations were then used to create the optimal structure of the battery housing, which not only had to be absolutely leak-proof but also had to ensure perfect contact between the individual cells and the flow of silicone oil. However, an object the size of the Ethec battery housing exceeded the capacities of the available direct metal laser sintering (<a href=\"https:\/\/facfox.com\/service\/dmls-3d-printing-service\" target=\"_blank\" rel=\"noopener\">DMLS<\/a>) equipment. And in order to \u201cshow the students the way from prototype to series production\u201d, according to Josef Mayr, the choice fell on metal casting. Specifically, a 3D-printed sand mold was used as a template for casting an aluminum-copper alloy \u2013 in short: printed casting.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/img.facfox.com\/imgs\/2021\/06\/ddba03f47799d8d4.png\" \/><\/p>\n<p>The digital CAD data of the battery housing provided by the Ethec team formed the basis for voxeljet to produce a sand casting mold using binder jetting <a href=\"https:\/\/facfox.com\/service\/3d-printing-service\" target=\"_blank\" rel=\"noopener\">3D print<\/a><a href=\"https:\/\/facfox.com\/service\/3d-printing-service\" target=\"_blank\" rel=\"noopener\">ing<\/a>. In this process, a few micrometer-thin layers of qu<a href=\"https:\/\/facfox.com\/news\/topics\/art\" target=\"_blank\" rel=\"noopener\">art<\/a>z sand and a binder jetted onto it are alternately layered on top of each other until the specified geometry of the later component is printed with the highest precision. The ETHEC battery housing was finally cast in the aluminum foundry of Kupral Spa, based in Brescia, Italy.<\/p>\n<p>Full-scale practical testing of the ethec prototype is currently still pending. But the concept of an <a href=\"https:\/\/facfox.com\/news\/topics\/energy\" target=\"_blank\" rel=\"noopener\">energy<\/a>-efficient e-motorcycle devised by students shows impressive potential: The top speed should reach a maximum of 160 km\/h, and thanks to recuperation and the novel battery concept, ethec city could achieve a range of around 400 km. Whether the concept will also convince potential buyers remains open for the moment \u2013 the search for a p<a href=\"https:\/\/facfox.com\/news\/topics\/art\" target=\"_blank\" rel=\"noopener\">art<\/a>ner for the industrial series production of ethec city is still ongoing.<\/p>\n<div><\/div>\n<p style=\"font-size: 14px; color: grey;\">* This article is reprinted from <a href=\"https:\/\/www.3dprintingmedia.network\/voxeljet-realized-a-new-cooling-system-in-the-electric-motorcycle\/\" target=\"_blank\" rel=\"noopener\">3D Printing Media Network<\/a>. If you are involved in infringement, please contact us to delete it.<\/p>\n<p><i class=\"far fa-fw fa-user\"><\/i> Author: Andrea Gambini<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A novel cooling system in the Ethec City electric motorcycle ensures a longer service life for the battery cells. In order to introduce the students to manufacturing processes that can be used for series production outside of prototype manufacturing, voxeljet produced the mold for the innovative battery housing of the prototype using the binder jetting process. A student focus project at ETH Zurich is realizing prototypes of a new type of cooling system with support from voxeljet.<\/p>\n","protected":false},"author":3,"featured_media":184845,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"fifu_image_url":"https:\/\/img.facfox.com\/imgs\/2021\/06\/768902ffc13ac0ab.png","fifu_image_alt":"Voxeljet Develops New Cooling System for Ethec City Electric Motorcycle","footnotes":""},"categories":[383],"tags":[24,145,3372,3777],"class_list":["post-181110","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-automotive","tag-3d-printing","tag-automotive","tag-dmls","tag-electric-vehicles"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Voxeljet Develops New Cooling System for Ethec City Electric Motorcycle - FacFox News<\/title>\n<meta name=\"description\" content=\"A novel cooling system in the Ethec City electric motorcycle ensures a longer service life for the battery cells. In order to introduce the students to manufacturing processes that can be used for series production outside of prototype manufacturing, voxeljet produced the mold for the innovative battery housing of the prototype using the binder jetting process. A student focus project at ETH Zurich is realizing prototypes of a new type of cooling system with support from voxeljet. 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In order to introduce the students to manufacturing processes that can be used for series production outside of prototype manufacturing, voxeljet produced the mold for the innovative battery housing of the prototype using the binder jetting process. A student focus project at ETH Zurich is realizing prototypes of a new type of cooling system with support from voxeljet. 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In order to introduce the students to manufacturing processes that can be used for series production outside of prototype manufacturing, voxeljet produced the mold for the innovative battery housing of the prototype using the binder jetting process. A student focus project at ETH Zurich is realizing prototypes of a new type of cooling system with support from voxeljet. 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