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Author Topic: Who's taken the coldest Zero ride?  (Read 9749 times)

ColoPaul

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Re: Who's taken the coldest Zero ride?
« Reply #30 on: November 27, 2012, 11:38:03 PM »

OK, rode into work today at 15F.  :o   But I cheated - the bike was stored all night in a 50F workshop!  ;D
Supposed to warm up to 62F today (that's Colorado, wide daily temp swings).

Interesting observation:  Yesterday I rode into work taking the charge from 50% down to 25%; temp was ~32F;  bike temp was ~40F.   As usual, I could tell there was reduced power (cold combined with low charge) - top speed was ~60mph, low but reasonable.
At work, I plugged in, and it was supposed to warm up to 45F on the ride home.   Two things happened, first we got clouds and it never warmed up at all (still 32F) and second, the bike didn't charge.   So riding home: temp was ~32F, bike temp was ~32F, taking the charge from 25% down to 0%.  And the top speed was 45mph (if I was in a tuck).   Yikes, don't want to do that again - too much traffic wanting to move at 55 mph.   By the time I made it home, top speed was maybe 35 mph.   Plugged in, charge to full (per the kill-o-watt) was 5.35 kWh;  so it appears the battery wasn't overly low.   Interesting how much performance degradation cold and low charge results in.
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protomech

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Re: Who's taken the coldest Zero ride?
« Reply #31 on: November 28, 2012, 12:11:12 AM »

Interesting. The User Manual states the BMS will disable charging below 20 degrees F - I wonder if your bike sensor is poorly calibrated.

I've ridden in a bit around 30 degrees ambient, but the bike was probably warmer than that. ZF9 owners will probably see less power degradation in the cold because we max out around 2.5C vs 3.8C discharge .. assuming it's not a motor or motor controller cutout (both probably run better in the cold, to a point)
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ColoPaul

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Re: Who's taken the coldest Zero ride?
« Reply #32 on: November 28, 2012, 01:31:08 AM »

Interesting. The User Manual states the BMS will disable charging below 20 degrees F - I wonder if your bike sensor is poorly calibrated.

Upon discovering the bike had not charged all day, I plugged it back into the work outlet - and observed still no charging (looking at the BMS LED indicator).  I unplugged and replugged several times - still no charging.
The work outlet is a GFCI.  So I pressed the 'test' button and the 'reset' button popped out (usually this indicates it was not tripped).  I pushed the reset button back in, plugged the bike in, and to my surprise it started to charge.

I'm leaning towards the GFCI outlet being tripped or not functioning properly, but I can't be sure, maybe it was temp related.
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ZeroSinMA

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Re: Who's taken the coldest Zero ride?
« Reply #33 on: December 07, 2012, 09:06:02 AM »

The wife and I recently returned from an extended visit to Southern, CA where the temperature ranged from the 60s, cold by the locals' reckoning, to more seasonal 80s.

Trip included a stop at Hollywood Electric where I took a rocketized 2012 ZF9 on a warm albeit drizzly test ride.

Pulling in the driveway with the wife this evening, she read the outside temp off the display: "Twenty four degrees! I need a sauna at the gym!"

I retorted in unintentional rhyme, "I need to take the Zero for a spin."

After pulling on layers of long underwear, flannel lined jeans, and everything else I could fit under my gear, I stuffed foot warmers into my boots, donned my warmest ski gloves and took off into the night.

The bike was stored in an unheated garage. The battery was no doubt at 24 degrees, too, when I took off. I had not ridden my 2012 ZF9 for nearly a month due to travel. I was hopefully optimistic about reliability but made a contingency plan just in case: call my wife to get her to pick me up on the way back from the gym.

Long story short, the bike operated exactly as on a warm summer day. The only difference is the range was cut approximately in two; a bar fell at 6 miles, another at 11, and another at 16 just before I rode back into my garage. On a warm day I regularly take a 32 mile trip on three bars.

But aside from the expected cut in range from the slower chemical reaction rates in the box below me -- aren't batteries supposed to keep longer in the freezer? -- I could not tell the difference.

Well, except for a woman at a red light who looked at me, riding up next to her out of the frigid night swathed in black gear and glowing LED white, like she'd discovered her own, personal space alien.

Needless to say, there were no other motorcycles on the road, electric or otherwise.
« Last Edit: December 07, 2012, 09:14:46 AM by ZeroSinMA »
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protomech

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Re: Who's taken the coldest Zero ride?
« Reply #34 on: December 07, 2012, 10:32:23 AM »

Cells will self-discharge more slowly in the freezer, but the voltage drops and the internal resistance goes up.

It's been nice here recently.. 60-70 degrees many days. Kinda crazy for December.
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dahlheim

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Re: Who's taken the coldest Zero ride?
« Reply #35 on: December 07, 2012, 08:40:52 PM »


Needless to say, there were no other motorcycles on the road, electric or otherwise.

why is that needless to say?  i plan on getting out my bmw again when the temps go below 25 (just to be safe and not get stranded by a computer).  only frozen precipitation keeps my bikes in the garage.
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ZeroSinMA

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Re: Who's taken the coldest Zero ride?
« Reply #36 on: December 07, 2012, 10:30:36 PM »


Needless to say, there were no other motorcycles on the road, electric or otherwise.

why is that needless to say?  i plan on getting out my bmw again when the temps go below 25 (just to be safe and not get stranded by a computer).  only frozen precipitation keeps my bikes in the garage.

Not that I'd ever want to get into a daring contest with this crew but I rarely see riders out after dark and never late at night in winter. Ever.
« Last Edit: December 07, 2012, 10:32:09 PM by ZeroSinMA »
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protomech

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Re: Who's taken the coldest Zero ride?
« Reply #37 on: December 08, 2012, 12:25:35 AM »

During the summer here there are typically 6-10 bikes parked out in front of my building.

Today was a relatively nice day (morning temps of 55) .. there are 3 bikes including mine parked out front. Counting the two besides mine, I have seen 3 other bikes parked there this week.

Motorcycles in the US are largely luxury goods, and used accordingly. (I rode my gas bike in to work about once a week too, not exempting myself here : )
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kbfcanada

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Re: Who's taken the coldest Zero ride?
« Reply #38 on: December 09, 2012, 05:13:23 AM »

I took a short ride this afternoon around the block, carefully since I don't have winter tires. LOTS of snow. It was about -13 C (8.6F) with a windchill of -23 (-9.4F). It did fine, but of course I do keep it in a garage, here! I probably should have worn a helmet, but I'm a crazy canuck and it wasn't THAT cold...
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ZeroSinMA

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Re: Who's taken the coldest Zero ride?
« Reply #39 on: December 09, 2012, 05:59:38 AM »

I took a short ride this afternoon around the block, carefully since I don't have winter tires. LOTS of snow. It was about -13 C (8.6F) with a windchill of -23 (-9.4F). It did fine, but of course I do keep it in a garage, here! I probably should have worn a helmet, but I'm a crazy canuck and it wasn't THAT cold...

This is exactly what I mean about not daring this crew. 9 degrees F without a helmet?

Bwah ha ha ha ha!

As we say in the USA, f*** yeh!

So far I think my 24 degrees F battery on a 10 mile 24 degree F ride is still the coldest from a battery test POV on this thread.  Let's beat it!
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kbfcanada

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Re: Who's taken the coldest Zero ride?
« Reply #40 on: December 09, 2012, 10:09:48 AM »

@ZeroSinMA - so what would you say is the minimum distance I need to travel? And/or minimum speed? I am SO tempted to get winter tires on my DS - in Manitoba I can go studded if I want - never had any, though; on a car they're not worth it but maybe on a bike it is...
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ZeroSinMA

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Re: Who's taken the coldest Zero ride?
« Reply #41 on: December 09, 2012, 10:16:18 PM »

@ZeroSinMA - so what would you say is the minimum distance I need to travel? And/or minimum speed? I am SO tempted to get winter tires on my DS - in Manitoba I can go studded if I want - never had any, though; on a car they're not worth it but maybe on a bike it is...

I'm going to try for 20/20, 20 miles at 20F and starting with the battery also at 20F. That should tell us quite a bit about the impact of low temps on range and performance.
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Electric Terry

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Re: Who's taken the coldest Zero ride?
« Reply #42 on: December 21, 2012, 09:07:27 PM »



www.facebook.com/lifeoffthegrid

Not sure of the temperature, but the ice was on the roads by sunset and it got colder for the next 6 hours by the minute it seemed.

The battery voltage/energy profile takes a shift in very cold temperatures.  The bike will indicate you have less range remaining than you do.  But you are probably ready to park it and warm up anyway.  

Also there are safety measures in place to not allow charging the batteries below freezing, but if you know the temperature is that low outside, don't even try as some very bad things could happen.  Not really until a couple degrees below freezing, and I think the safety cutoff is set right at freezing, so a little buffer.  Best to push the bike in a garage or lobby or anywhere to warm it up first.
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Richard230

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Re: Who's taken the coldest Zero ride?
« Reply #43 on: December 21, 2012, 10:31:13 PM »

If you ask me, this looks even colder.   :o

And I also liked this photo showing a good use of a highway rest stop.
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protomech

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Re: Who's taken the coldest Zero ride?
« Reply #44 on: December 21, 2012, 10:38:16 PM »

Also there are safety measures in place to not allow charging the batteries below freezing, but if you know the temperature is that low outside, don't even try as some very bad things could happen.  Not really until a couple degrees below freezing, and I think the safety cutoff is set right at freezing, so a little buffer. Best to push the bike in a garage or lobby or anywhere to warm it up first.

Believe the owner's manual states that the BMS will disable charging below 20F.
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