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Reusing Electric Car Batteries Will Cut Greenhouse Gases

A group of University of Waterloo researchers say the salvage yard need not be the end of the road for exhausted electric car batteries.

They’ve found that refurbished EV batteries can have a second career as power sources for everything from lighting to refrigeration.

“The idea is you take the batteries out of the car, remanufacture them and use them in a stationary application,” says Steven B. Young, an associate professor in the School of Environment, Enterprise and Development (SEED), Faculty of Environment.

Working with a team of Waterloo researchers, Young has found that repurposing batteries means a further reduction to greenhouse gas emissions, essentially doubling the environmental advantage of buying electric vehicles.

“I was surprised by how beneficial it was,” Young says. “Researchers are keen on recycling (stripping batteries for valuable components). So to say, ‘Hold on, before you do that, we can integrate this into the power system and get this value-added use from the product,’ is kind of neat.”

Lithium-ion EV batteries are larger and heavier than batteries used to start cars with internal-combustion engines. The EV batteries gradually lose the muscle necessary to move an electric car – but they can still draw power and store it for later use.

The team wants to take the research another step further — a trial, possibly in a warehouse with lighting, refrigeration and electric equipment that need power. A bank of refurbished electric-vehicle batteries could capture electricity at cheaper, off-peak times of the day, and use it later to offset costs during peak periods.

Re-using batteries this way formed the basis of a masters thesis completed by Leila Ahmadi in the Department of Mechanical and Mechatronics Engineering.

Sustainable Technologies and Assessments, a scholarly journal, has published the team’s work.

The research team is a classic Waterloo collaboration. Besides Ahmadi and Young, it includes Roydon Fraser, a professor of mechanical and mechatronics engineering; Michael Fowler, a professor of chemical engineering; Sean Walker, a post-doc in chemical engineering; and Arthur Yip, a Waterloo undergrad. Mitsui and Co. (Canada) Ltd. and Nuvation Engineering are industry partners.

Depending on the driving they handle, electric-vehicle batteries may last about eight years. As stationary batteries doing lighter duty, they could work for another 12 years, Young says.

The team is now exploring other issues the research has raised. Government policies, for example, favour generating electricity, not storing it. The researchers also want to know more about the secondary industry that might be created around getting spent batteries ready for stationary use.

“There is lots more to discover in this area,” Young says.

Apr 24, 2015Blagojce Krivevski
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Blagojce Krivevski

Blagojce Krivevski is physicist and green technology lover. Keep in touch with Blagojce through his email, web site, Twitter, Linkedin, Facebook and Google+.

April 24, 2015 Electric Car Newselectric car, electric car batteries, electric cars, Reusing Electric Car Batteries, University of Waterloo
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