Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[DonTom]

Zero bikes already have a voltmeter on the bus, and there are two Android apps that help read and one of them charts it by the second and down to the millivolt.

But I would prefer it to be true analog.

I think I already have the app, if "Zero Voltage" is one of them.


-Don- Auburn, CA

[BrianTRice@gmail.com]

Zero bikes already have a voltmeter on the bus, and there are two Android apps that help read and one of them charts it by the second and down to the millivolt.

But I would prefer it to be true analog.

okay boomer

I think I already have the app, if "Zero Voltage" is one of them.

"Metrics for Zero Motorcycles" is what I'm primarily referring to: https://play.google.com/store/apps/details?id=com.mc.zero&hl=en_US

[DonTom]

"Metrics for Zero Motorcycles" is what I'm primarily referring to: https://play.google.com/store/apps/details?id=com.mc.zero&hl=en_US

I like that  one! I didn't know it existed. I will go with it, thanks!

-Don-  Auburn, CA

[DonTom]

Well, here is why I have learned to never assume anything until it is all tested. I got a real surprise after I rode my Zero DS down to 57% SOC today. The battery voltage is exactly 106.0 VDC measured directly on the Delta Q. connector.

106.0 VDC according the charge in the unofficial guide is normally around 73% SOC. This means my battery is fine, but my SOC % reads flaky!

I think the change happened right after I got the last FW update, but I didn't notice the major change in what I thought was range until well after.

But this makes me wonder what range I will have left at 0 SOC. I figure quite a bit, if the   charge vs. SOC is reasonably accurate here.

Whops, in more checking, I find a BIG contradiction here, which means my bike SOC is okay and the battery is flaky.

Now I  notice a "must fix" in the longer chart, so now I do have to assume the battery.

Brian, any comments?

-Don-  Auburn, CA

[domingo3]

Well, here is why I have learned to never assume anything until it is all tested. I got a real surprise after I rode my Zero DS down to 57% SOC today. The battery voltage is exactly 106.0 VDC measured directly on the Delta Q. connector.

106.0 VDC according the charge in the unofficial guide is normally around 73% SOC. This means my battery is fine, but my SOC % reads flaky!

I think the change happened right after I got the last FW update, but I didn't notice the major change in what I thought was range until well after.

But this makes me wonder what range I will have left at 0 SOC. I figure quite a bit, if the   charge vs. SOC is reasonably accurate here.

Whops, in more checking, I find a BIG contradiction here, which means my bike SOC is okay and the battery is flaky.

Now I  notice a "must fix" in the longer chart, so now I do have to assume the battery.

Brian, any comments?

-Don-  Auburn, CA

What leads you to say that your battery is flaky?   I feel like I missed something.

[DonTom]

What leads you to say that your battery is flaky?   I feel like I missed something.

Today, I started with my SOC at 100% (above 115 volts). I rode it for exactly 14.8 miles mostly at around 35 MPH. Some slower (10 MPH), some a bit faster (50 MPH). That took 43% ( SOC  indicated is 57% of my SOC or down to 106.0 volts).

I am getting around 0.34418 miles per 1 SOC average in mostly easy slow riding. My SOC will even go down faster with a few more miles.

On the freeway, I would not be able to go 20 miles at 65 MPH. Perhaps not even 15 miles. I would not even chance ten miles at 65 MPH.

It's a 6.5 KWH battery. Temp was  a little above 50F. today.

Spec for full range on this bike is:

City=74 miles
Highway=35 miles
Combined=47 miles

-Don-  Auburn, CA

[BrianTRice@gmail.com]

The SoC to voltage curve is for at-rest conditions and is only the most vague guide because it may even vary by model year.

Also, Zero computes SoC in a proprietary way that I am not privy to.

I am really tiring of DonTom hijacking threads to talk about this. This thread is about SoC display discontinuity.

Make your own thread.

[Crissa]

Yeah, Don, can you collect all these observations into one place?

It'll be useful as other bikes age and start having battery symptoms, too.

-Crissa

[togo]

> I have considered installing a small voltmeter on the bike, if I could find a good place to mount such. I think an anaolog voltmeter would be best, with a resistor in series at the bike's external charger connector for  safety.

> Has anybody here done such?

Yes, this one:

https://www.amazon.com/gp/aw/d/B01DW8AIFI/ref=ppx_yo_mob_b_track_package_o0_img?ie=UTF8&psc=1

Fuses at battery end, both wires, and thin wires, since it's just a little bit of current.  I used ring terminals to the controller, under the seat. Doubles as an indication contractor is on.