{"id":1991,"date":"2017-12-12T11:24:45","date_gmt":"2017-12-12T11:24:45","guid":{"rendered":"https:\/\/blog.normagroup.com\/?p=1991\/"},"modified":"2019-11-28T08:06:18","modified_gmt":"2019-11-28T08:06:18","slug":"how-batteries-live-long-in-electric-vehicles","status":"publish","type":"post","link":"https:\/\/blog.normagroup.com\/en\/how-batteries-live-long-in-electric-vehicles\/","title":{"rendered":"How Batteries Live Long in Electric Vehicles"},"content":{"rendered":"

Batteries are a major topic of discussion in electric mobility. Energy storage, for instance, significantly determines the performance, range, charging time and maintenance of an electric vehicle. The temperature of the battery plays a major role in this.<\/p>\n

So what effect does a battery\u2019s thermal stress have on these criteria?<\/p>\n

\n

The even temperature of all individual cells in the battery pack is an essential step in the cells having an equal life span.<\/p>\n<\/blockquote>\n

Let\u2019s look at an example: battery packs with an internal liquid cooling system. The specification comes from a major car manufacturer. We at NORMA Group\u2019s Research & Development team were able to identify requirements crucial for the design of tubing systems inside liquid-cooled batteries.<\/a><\/p>\n

The Cooling System Is Also For Heating<\/h2>\n

But first thing\u2019s first. A battery\u2019s cooling system is not just for cooling, but also for heating. If you want to access an electric vehicle\u2019s full power from a cold start in the winter, the battery must be preconditioned. This means that the cells must have a minimum temperature.<\/p>\n

This is achieved by electrically heating the battery\u2019s coolant \u2013 while the cold vehicle is being charged from the mains. If the warm-up isn\u2019t done in advance, the vehicle\u2019s electronic power will reduce itself to spare the battery from damage.<\/p>\n

\t\t\t\t\"Charge<\/p>\n

The specification defines a temperature-time profile for the life of the battery. The battery operates between 35 and 57 degrees Celsius. Operating above or below this temperature shortens battery life. To regulate the temperature, a heat exchanger is attached to each individual cell. This dissipates and supplies heat with liquid.<\/p>\n

In terms of the temperature-time profile, the battery operates for the vast majority of the time between 50 and 55 degrees Celsius. This indicates that the high temperatures for an electric vehicle\u2019s cooling system don\u2019t pose a significant challenge.<\/a> Instead, it becomes clear: the even temperature of all individual cells in the battery pack is an essential step in the cells having an equal life span.<\/p>\n

\t\t\t\t\"How<\/p>\n

In a tubing system, this means that the coolant must be distributed to all cells as needed. Flow rates must be individually adapted to the structure of the battery. This keeps operating temperatures at the coolant outlet of each individual cell from deviating from one another by more than 2 degrees Celsius.<\/p>\n

The cooling system also has an important role to play during the charging process.<\/a> Heat must be dissipated effectively to prevent battery cells from being damaged by overheating. The charging current must be reduced whenever the temperature exceeds 55 degrees Celsius. This lengthens the charging process.<\/p>\n

How Is a Fast Charge Possible?<\/h2>\n

How is a fast charge possible? There are some promising approaches. For example, batteries should be cooled to the lowest temperature allowed before charging. This allows the battery to be charged with energy even faster. It also shortens the battery\u2019s charging time. The cooling system\u2019s influence is apparent here, too.<\/p>\n

Other important constraints include low weight, small footprint and the ability to create customized, complex tubing systems. These complete thermal management systems for battery packs will represent a broad field of application for NORMA Group in the future.<\/p>\n","protected":false},"excerpt":{"rendered":"

An electric vehicle\u2019s cooling systems have a major impact on the performance of a lithium-ion battery. A consistently high temperature is the most important factor for a battery\u2019s long-term reliability in terms of its range, charging time and maintenance.<\/p>\n","protected":false},"author":16,"featured_media":2125,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[9],"tags":[147,122,25,76],"class_list":["post-1991","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-cooling-water-systems","tag-expertise","tag-future","tag-mobility"],"acf":[],"yoast_head":"\nHow Batteries Live Long in Electric Vehicles - NORMA Group Blog<\/title>\n<meta name=\"description\" content=\"An electric vehicle\u2019s cooling systems have a major impact on the performance of a lithium-ion battery \u2013 in terms of range, charging time and maintenance.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.normagroup.com\/en\/how-batteries-live-long-in-electric-vehicles\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How Batteries Live Long in Electric Vehicles - 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