Print

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

[Crissa]

The Gen2 bikes don't have a 12v battery in any year yet.

The 12v battery can supply an arbitrary current, which is why they use it.  DC-DC boards are inefficient at that.

-Crissa

[tracy216]

24 days later I finally got my bike back. So annoying. Now I don't trust the 12 V battery. I'm going to learn how to monitor its charge level.

[victor6.7y]

If you have a 12v accessory port port and a volt meter it would give you a quick indication.

[remmie]

if you download the zerong app, and enter the same credentials as for the official zero app, you can see the 12V battery voltage.

https://apps.apple.com/nl/app/zerong/id1488172044#?platform=iphone

or use the info in the following thread and get some json data in the browser

https://www.electricmotorcycleforum.com/boards/index.php?topic=9520.0

it will look something like below, the 12V battery voltage is found under "main_voitage" and in the example below it is 13.08 volt

[
{"unitnumber":"123456",
"name":"538ZFAZ76LCK00000",
"unittype":"5",
"unitmodel":"6",
"mileage":"4382.46",
"software_version":"190430",
"logic_state":"2"
,"reason":"2",
"response":"0",
"driver":"0",
"longitude":"4.5000",
"latitude":"51.5000",
"altitude":"0",
"gps_valid":"0",
"gps_connected":"1",
"satellites":"0",
"velocity":"1",
"heading":"344",
"emergency":"0",
"shock":"",
"ignition":"0",
"door":"0",
"hood":"0",
"volume":"0",
"water_temp":"",
"oil_pressure":"0",
"main_voltage":13.08,
"analog1":"0.09",
"siren":"0",
"lock":"0",
"int_lights":"0",
"datetime_utc":"20191030162309",
"datetime_actual":"20191102113548"
,"address":"YourCity, YourStreet",
"perimeter":"",
"color":2,
"soc":91,
"tipover":0,
"charging":1,
"chargecomplete":0,
"pluggedin":1,
"chargingtimeleft":0}
]

[siai47]

I believe there is a automotive style DTC connector in the tank box.  You can buy a connector (Amazon, E-bay) that will plug into that DTC port and will provide full time 12 volt output.  You could put a small digital meter on the leads to monitor the battery.  Just remember, this is full time power and anything connected to it will drain the 12 volt Li-Ion battery when the bike isn't in the run position. 

[tracy216]

Four months after getting a new 12V battery replaced under warranty, the new battery is already dead. So back to the dealer it goes. Does anyone know the name or part number of the DC-to-DC converter on a 2020 SR/F? I want to make sure the dealer replaces it this time.

[lunarx]

Four months after getting a new 12V battery replaced under warranty, the new battery is already dead. So back to the dealer it goes. Does anyone know the name or part number of the DC-to-DC converter on a 2020 SR/F? I want to make sure the dealer replaces it this time.

I think this is the part you are asking about:
https://www.af1racing.com/DC-DC-CONV-SEVCON-622-11202-NON-EMC-ZM60-04015

There is a Parts Manual, on AF1's website, where you can look-up parts.
https://www.af1racing.com/2020-Zero-SRF-Spare-Parts-Catalog

[Demoni]

Four months after getting a new 12V battery replaced under warranty, the new battery is already dead. So back to the dealer it goes. Does anyone know the name or part number of the DC-to-DC converter on a 2020 SR/F? I want to make sure the dealer replaces it this time.

Bummer that the bike ate another 12v battery. Really does sound like a issue with the DCDC converter not correctly charging the battery. Other possibility, there is something wrong with the logic used to maintain the 12v packs charge?

I am not sure what type of 12v battery Zero uses but I would guess it's a small (lower capacity) sealed lead acid pack. If that is true the bikes DCDC needs to provide 14.4v to fully charge the 12v pack, you should be able to measure this with the bike keyed on.
Ideally the bike should wake the main HV pack up to recharge the 12v battery any time it sees the voltage drop below ~11.5v. Zero might use a lithium pack for their 12v battery, in that case the above principals still hold true but the voltages would be different.

Hope the 2nd time is the charm.

[MVetter]

Zero might use a lithium pack for their 12v battery, in that case the above principals still hold true but the voltages would be different.

They do. I've seen it but I can't recall the brand/model.

[Hans2183]

lifepo4 indeed, DennisNL recently shared a picture of his during charge tank install on FB https://www.facebook.com/photo/?fbid=949762169304238&set=g.111611975574686

[NetPro]

Zero might use a lithium pack for their 12v battery, in that case the above principals still hold true but the voltages would be different.

They do. I've seen it but I can't recall the brand/model.

I actually replaced my 12V battery last week and surgically cut open the plastic shell on the old one just to see what junk they are putting in there.
No brand and only a couple of alpha-numeric strings which when I googled it, got no hits.
Either super-secret stuff or el cheapo junk that cannot be identified.
I cannot post pictures today because I am out  of town.
If anyone is interested, reply and I will post them on Thursday.

[Demoni]

They do. I've seen it but I can't recall the brand/model.

Good to know. Guess that explains the heating element.

I actually replaced my 12V battery last week and surgically cut open the plastic shell on the old one just to see what junk they are putting in there.
No brand and only a couple of alpha-numeric strings which when I googled it, got no hits.
Either super-secret stuff or el cheapo junk that cannot be identified.
I cannot post pictures today because I am out  of town.
If anyone is interested, reply and I will post them on Thursday.

Please do post photos when you have a chance. Wonder if there is anything inside the pack to balance cell voltages or over/under voltage/current protection?
If the cells do not have any identifying markings the options could be narrowed down by measuring cell capacity.

[NetPro]

I got my replacement through a Zero dealer.
There are some markings on the cells but when I  google and bing them, got no real hits and I  tried entering just a part of the characters printed on the cells, as well as the whole thing but no cigar.
I did not see any balancing components on the battery but have not dissected the cells themselves. There are four cells attached by one end and two thick wires (look like AWG 8.) going to the posts.

Because this battery is 2 and a half years old, it would be imposible to measure capacity accurately. I have a West Mountain tester  that connects to a laptop and can analyze a battery pretty good but I  am sure it would give bogus info being that this battery is so old and have reduced capacity.

I go back home on Wednesday night and will post the pics then.

[Auriga]

I'm fairly sure it's this unbranded Antigravity battery with a custom heater element on it:
https://antigravitybatteries.com/products/starter-batteries/small-case/ag-401/

[rgutt]

The previous decade of Zero motorcycles without 12-volt batteries is evidence they are not actually necessary on an E-bike. I read on this site that at some point recently Zero even added the always-on 12-volt line to the OBDII connector, and that is on an SR without a 12-volt battery. Whether they did that by leaving the main DC-DC converter active at all times or setup a dedicated little buck switch mode power supply, I don't know. I can say that the draw on the main battery pack is irrelevant. On its face, I'd say that choice to use a 12-volt battery is borderline retarded, but I would actually like to see Zero's reasoning behind it because I'm sure they didn't just do it on a whim.