LEAF Batteries Enter After-Life Use As Energy Storage At Nissan Development Center In Japan

DEC 7 2014 BY MARK KANE 11

24 kWh Lithium Battery Found Inside The 2013-2014 Nissan LEAF

24 kWh Lithium Battery Found Inside The 2013-2014 Nissan LEAF

4R Energy's energy storage system

4R Energy’s energy storage system

The joint venture between Nissan and Sumitomo, 4R Energy, is preparing to offer energy management services to businesses in Japan starting as early as next fall.

4R Energy is using old Nissan LEAF batteries, with 20-30% capacity loss.

One of the final steps before commercialization will be the set up of a 250 kW / 400 kWh power storage system at a Nissan development center in Atsugi, Kanagawa Prefecture. It should be ready in June 2015 and consists of 24 battery packs.

The purpose of the 400 kWh system will be to store electricity generated at night (off peak), when costs are cheaper, and to use it during the day. Expected savings should reach about 10% of energy costs.

There will be an implemented function to accommodate requests from power companies to curb usage.  Additionally, the system will serve as an emergency power source.

If we assume 10-year use of batteries in electric cars (hopefully longer), we are just few years before the time when there will be thousands of old battery packs available. The number of old batteries with 70-80% capacity will then rise every year.

Source: Nikkei

Categories: Nissan

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11 Comments on "LEAF Batteries Enter After-Life Use As Energy Storage At Nissan Development Center In Japan"

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Jouni Valkonen
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Jouni Valkonen
For companies stationary energy storage solution is rather attractive investment because they are providing four different source of revenue for the company. (1) Batteries can buffer the demand spikes. This makes it possible to save in electricity bills, because company can function with lower rated power grid connection. This is especially important with fast electric car chargers. (All Tesla Superchargers will be equipped with 400 kWh battery bank) (2) Lithium batteries do not like deep discharges and full charges. But for optimal calendar life, charge level should be kept between 30 and 70 %. This means that for back-up power there is always at least 30 % of charge in store. Therefore free UPS system is provided as a by-product and this adds value. (3) Companies can make a contract with Grid Utility company, that it can control e.g. 30 % of the capacity of battery for grid balancing purposes. This is especially important if there is a shortage of electricity, e.g. nuclear power plant drops unexpectedly from the grid. Additionally this helps with absorbing surplus wind electricity production. (4) and finally, it is possible to store local roof-top solar power into battery. And therefore cut in electricity bills. Although… Read more »
EV_Drive
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EV_Drive

This is awesome! I hope they do small systems for residential.

bennyd
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bennyd

I’m sure Tesla has this in mind too. Our hard wired houses hooked up to a power company will be a thing of the past. Renewable energy independence, solar to battery.

Mike
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Mike

Pretty sure this is exactly what Telsa have already said they plan on doing, although with reconfiguring the batteries rather than keeping them in the original packs.
4R look like they are taking the complete pack and connecting them up.

sven
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sven

“If we assume 10-year use of batteries in electric cars (hopefully longer), we are just few years before the time when there will be thousands of old battery packs available.”

Since there are no 10-year-old LEAFs, where is 4R Energy getting old Nissan LEAF batteries with 20-30% capacity loss from? Arizona?

M Hovis
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M Hovis

Ii’s not so much the years, but the miles. There are applications like taxis where the miles are racked up in just a few years.

I have always thought this was a great use but I have never looked really close at the life cycle. Li batteries do not die a linear death..

sven
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sven

Funny you should mention EV taxis. I’ve been trying to hail a NYC LEAF cab for quite a while now, even if I don’t need a ride at that particular moment. But every time I spotted one driving by it already had a fare inside. It’s my Moby Dick. One day I’ll catch my yellow whale. 🙂

Jouni Valkonen
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Jouni Valkonen

No, shelf-life for lithium ion battery is more important than cycle life. The degradation of lithium-ion batteries due to cycling with e.g. 50% DOD, is almost zero. With 80 % DOD Tesla batteries has cycle life about 3000-5000, that is way more than is ever needed for driving.

This is also why Tesla offers infinite mileage warranty for their 85kWh battery.

mike w
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mike w

20-30% capacity loss ? Nissan’s battery warranty will replace degraded batteries when capacity loss reaches 33/34%. what were they planning to do with these warranty replacement batteries? Where are they getting unwanted batteries with only 20% capacity loss?

Jouni Valkonen
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Jouni Valkonen

If Leaf gets wrecked in car accident, typically battery survives, althoug car gets totaled. This battery then can be salvaged and used for energy storage solution. That is one route to get used EV batteries.

Spec9
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Spec9

It looks like a crypt for LEAF batteries.