forcedexposure
Posts: 11
Joined: Tue Jan 29, 2019 7:45 pm
Delivery Date: 31 Jan 2019
Leaf Number: 5473

Is CHAdeMO safe?

Thu Feb 14, 2019 5:29 am

Hello Leaf Friends,

I just got a 2019 Leaf SV. One of the incentives that was exciting at signing is free two years of charging at EVGo charging stations, cuz there’s an EVGo CHAdeMO charging station at my supermarket. Because of this, I didn’t bother getting level 2 charging set up at home before buying the car. Now it turns out that this particular CHAdeMO charging station is broken and hasn’t worked in the two weeks since I bought my Leaf.

Is this a blessing? Am I better off NOT using a CHAdeMO QC station? Will it damage my Leaf battery?

I live in the Boston area, if the weather matters.

Thanks!
Deep Blue Pearl 2019 Leaf SV, All Weather Package

LeftieBiker
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Re: Is CHAdeMO safe?

Thu Feb 14, 2019 5:44 am

Avoid using Chademo (aka DCFC) when the battery pack gets hot - more than 6 or 7 temp bars, which is about 2/3 "filled" on the car's battery temp gauge. In Winter you shouldn't have to worry about that unless you do multiple fast charges on a trip. You should definitely get your own charging station installed before Spring. If you got the car expecting to do frequent long trips, including multiple charges per trip, you have a problem. Otherwise, probably not.
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WetEV
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Re: Is CHAdeMO safe?

Thu Feb 14, 2019 10:54 am

forcedexposure wrote:One of the incentives that was exciting at signing is free two years of charging at EVGo charging stations, cuz there’s an EVGo CHAdeMO charging station at my supermarket. Because of this, I didn’t bother getting level 2 charging set up at home before buying the car. Now it turns out that this particular CHAdeMO charging station is broken and hasn’t worked in the two weeks since I bought my Leaf.

Is this a blessing? Am I better off NOT using a CHAdeMO QC station?


Probably is a blessing. One of the joys of EV ownership is leaving home with a "full tank" everyday. Also makes preheating the inside of the car more efficient. If you leave at a consistent time, set a climate timer so the car is warm inside when you leave.

Will it damage my Leaf battery?

I live in the Boston area, if the weather matters.



Depends on what you mean by damage. Even at cool temperatures, the battery will have less cycles of life when quick charged. The effect isn't large. Weather does matter, loss will be faster at higher temperatures. Boston is fairly cool, 100F is rare.

The other trade-off is that the raised internal temperature created by fast charging—even though it might be below the “safe” threshold determined by the manufacturer of a particular Li-ion cell—could cause slight damage, ultimately resulting in reduced capacity and fewer recharge cycles. That said, with improvements in battery technology increasing the robustness of cells, fast-charge rates would have to be extreme to reduce the battery’s life to less than the portable product’s “useful” existence (defined as the time between the consumer buying the product and replacing it with a newer model).
https://www.digikey.com/en/articles/tec ... y-charging


viewtopic.php?f=17&t=27677&p=547072#p547072

Long trips in an EV are not as convenient as in a gasoline car. The LEAF more than most, due to passive cooling of the battery.
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Lothsahn
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Re: Is CHAdeMO safe?

Fri Feb 15, 2019 11:30 am

In general, the cost to drive an EV is $25-$50 per month, depending on electricity rates and how far you drive. This means that avoiding level 2 charging by using a CHAdeMO station is likely not a good use of your time, depending on how much your time is worth to you. Like other said, having the car just charge by being plugged in the garage, having it preheated, and always having its "tank full" is worth it. If you own (not lease) the car, you're also wearing out the battery faster with the rapid charging, which is going to cost $$$ in the long run.

Assuming you have a garage, I would definitely use a home charger. I think you're wasting your time. :)

You don't even have to have level 2 installed at home. I do all of my charging with a level 1 (110V) EVSE. I just plug it into a standard electrical outlet in my garage. Yes, it charges slowly, but the car is always charged by the next morning.

Just my 2c.
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davewill
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Re: Is CHAdeMO safe?

Fri Feb 15, 2019 3:12 pm

It's a blessing if it's made you reconsider installing home charging. You really should if at all possible. Sitting at the DC charger will get old fast if you don't. Leaving home every day with a full battery is one of the joys of owning an EV. I generally don't think about "fueling" my car for months on end until I have to travel farther than a single charge can take me...then I'm very grateful for DC charging. Anyway, using CHAdeMO is not, in general, "unsafe". If you were in the habit of doing so multiple times a day in extreme heat, it might degrade the battery faster (and it might not), but there's no reason to avoid it if you need the juice.
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