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 71 
 on: May 02, 2024, 08:56:46 PM 
Started by Richard230 - Last post by MVetter
Yeah he definitely did this. Nuked the 500 person SuperCharger team. And yeah it's looking like he's pouting because he wanted $55 billion and they said no, so he's just tearing shit down like an angry manchild.

This is really one of the main reasons Teslas are attractive at all as vehicles, because the SuperCharger network works incredibly well and has large deployments. Without it the company would have nothing. So he appears to be shooting the goose laying the golden eggs.

 72 
 on: May 02, 2024, 08:55:15 PM 
Started by Charlyseabass - Last post by MVetter
They are fully potted in epoxy as an anti-corrosion measure. You aren't getting in there and finding the bad cell. And again, the cell is brought up and balanced with the rest of the pack during a charge cycle, but it is so weak that it drops way before all the others even with the balance cycle.

And yeah this is more or less exactly what I suspected. The logs speak for themselves:

Quote
L:3066, l:3557, H:3300

Low cell voltage value 3.066vdc, high cell value of 3.300vdc. That's an imbalance of 234mV.

 73 
 on: May 02, 2024, 08:50:34 PM 
Started by Richard230 - Last post by Starpower
It is absolutely true. As most of you know Electrek is a big supporter of EV's and give Tesla credit for making them popular and viable. They have very accurate reporting.

https://electrek.co/2024/04/29/tesla-conducting-more-layoffs-including-entire-supercharger-team/

Here is the eye opening outtake from that A-hole:

And while the last layoffs were distasteful enough, continued layoffs have even worse optics, given Tesla’s move to ask shareholders for a $55 billion payout for its CEO just days after firing 14,000 people. That $55 billion could pay for 40 years worth of six-figure salaries for those employees. Quite a large payday for a part-time CEO, made worse by the potential loss of livelihood for more employees who might still be on the chopping block.

 74 
 on: May 02, 2024, 07:43:33 PM 
Started by Charlyseabass - Last post by Specter
Remember, when lith discharges, towards the end, it falls off a cliff.  so it may go from 3.0 volts to 0.4 volts in almost no time as the individual battery cell is totally driven into the toilet by the other ones.  It's basically a useless resistor at this point, and will immediately dump your arm voltage by that 3 volts, even if the others by their own discharge would have otherwise dropped by 0.003 volts.

Are the batteries completely potted?  can you get to ANY of the connections on them.  While it's a bit of a chore, if you could find the bad battery, you might be able to just charge that ONE battery to bring it's voltage up to the rest of the pack's individual cell's mean voltage, then try a topping charge to get the whole pack to fully charge and balance.  This is all assuming of course, the battery is not just totally destroyed at this point by the excessive dump discharging like that.

For those contemplating rebuilding an entire pack.  Please remember that the reason they are in sturdy aluminum cases etc, is to PROTECT them.  If you get into a wreck, or even a minor fender bender.  Something smacks into your pine box and dents a few of those cells, it's game over, you are a blow torch.  Keep this in mind, as well as waterproofing etc that may no longer be there.    Hot / Cold a few times and get a little condensation ont he bottom of that battery box and you might be in for some problems.  Just be careful if you are going to take on a task like this.

Aaron

 75 
 on: May 02, 2024, 07:31:25 PM 
Started by Richard230 - Last post by Specter
You still believe any crap that comes out of the lamestream?
They hate him, and will say anything to discredit / destroy him.  Id do a bit more research before just blindly gobbling down anything they try to feed you.

He did fire the senior staff / VP I think it was for a few of the departments.  He's letting go people from many other departments as well, so it's not just picking on that tiny little group.  I am sure this was not just a knee jerk decision he has made and these lay offs were in the making for a little while here already, but truth / honesty does not sell stories.

So, these 'news reports' you are quoting.  Can you link any of them here so we can check them out or is this more EV Fear Porn?

also, if one were to take a step back and look at a bigger picture,  all you all been doing nothing BUT bitching on how half his chargers are not working correctly.  If that is true, then that means that possibly.. the people in those departments are NOT doing their jobs properly.  A VERY GOOD reason to fire them then wouldn't it be?  Get rid of the low performers, get better performing people in.

At least a few of the W's that are needed to make a good story would be appreciated.

Aaron

 76 
 on: May 02, 2024, 07:22:35 PM 
Started by JaimeC - Last post by Specter
PitBull makes some decent lifters for many brands of bikes.  It's the handlebar style too that lifts from the yoke. 
https://www.pit-bull.com/index.php?route=product%2Fcategory&path=247

should get you on your way.

Aaron

 77 
 on: May 02, 2024, 07:21:14 PM 
Started by Richard230 - Last post by Richard230
So what is up with Musk - again?  The day after California's governor proclaimed that Ford and a couple of other auto brands would now be able to access Tesla Superchargers, news reports are saying that Musk fired his entire Supercharger installation and maintenance department, even the interns that were working in that division. As usual, everyone, including the workers and likely even the governor were blindsided by his action. What a guy!

 78 
 on: May 02, 2024, 06:59:39 PM 
Started by JaimeC - Last post by JaimeC
Looking for recommendations. I already have a lift for the rear wheel but I'm looking for a front wheel lift that will allow me to remove the front wheel. Thanks in advance!

 79 
 on: May 02, 2024, 01:05:15 PM 
Started by Charlyseabass - Last post by Charlyseabass
Here are the informations I got from an enginer about solutions

getting a 7.2kWh battery into your frame would be a bit of a challenge, there is a different power and signal harness and some additional bracket changes.  You can probably modify your harnesses, but it would be a fair amount of work.

With the latest MBB firmware, the 2014 motorcycle is compatible with all 2014 and newer battery modules, so maybe you could keep an eye out and find batteries from crashed motorcycles, and they will just pop in and work.

It is possible to build your own replacement batteries.  If you can manage to use the BMS's then you can still use the MBB and all the other Zero Systems will work, but if you can't use the BMS's then you'll have to remove the MBB's ability to disable the motor controller.  The charger can be put into "always charge" by connecting two wires in the harness, so it will charge whenever it is plugged into AC power.  The dash won't display anything useful about the batteries, but the speedometer and odometer might still work. To remove the MBB's ability to disable the controller you will need the Sevcon programmig tool, which is an IXXAT USB CAN device, and DVT, or the Zero Dealer GUI tool.

Rebuilding the batteries using the aluminum casing that you already have is impossible. The cell's are encapsulated in urethane as one solid brick, you can't disassemble the box without cutting and bending things beyond repair..  you can build your own box out of fiberglass or something, and re-use the electronics that are on the outside of your current batteries, it would be a bit of a challenge to get the BMS wired up with temperature sensors just like we use in the cell box so that the BMS has all the required inputs, but it is possible, I haven't heard of anyone trying to do this before wiith 2013 or newer batteries. Most of the people trying to rebuild old bikes with home-made batteries have 2010 or older bikes where were much simpler.  Now that zero 2013 bikes are more than 10 years old, I suspect there will be more people looking at trying to rebuild bikes using home-made components, maybe there will be more information available online from people doing it.


I am not sure what the value of a motorcycle with weak batteries is. I imagine it is worth at least $1000 to someone, the motor and controller alone might be worth that to the right person

 80 
 on: May 02, 2024, 01:00:23 PM 
Started by Charlyseabass - Last post by Charlyseabass
Here is the quick analysis from someone working for zero..each pack used one after the other alone with the jumping plug:

 both batteries seem to have about the same performance:

14sg1067 sagged to 3.1V on one cell and had around 11kW power lmit
 02513     04/03/2023 11:33:43   Riding                     PackTemp: h 22C, l 22C, PackSOC: 99%, Vpack: 91.907V, MotAmps: 146, BattAmps: 114, Mods: 01, MotTemp:  33C, CtrlTemp:  17C, AmbTemp:  17C, MotRPM:2594, Odo:18691km
 02514     04/03/2023 11:33:43   Batt Dischg Cur Limited    128 A (58%), MinCell: 3111mV, MaxPackTemp: 22C

14sg1061 sagged to 3.3V on one cell and had an 11kW power limit:

 02543     04/03/2023 09:34:57   Riding                     PackTemp: h 21C, l 20C, PackSOC: 98%, Vpack: 95.774V, MotAmps: 211, BattAmps:  92, Mods: 01, MotTemp:  37C, CtrlTemp:  18C, AmbTemp:  14C, MotRPM:1387, Odo:18692km
 02544     04/03/2023 09:34:57   Batt Dischg Cur Limited    111 A (50%), MinCell: 3368mV, MaxPackTemp: 21C


I can't easily tell which BMS log goes with witch battery name listed above, but here is one log, showing that at around 80A out of the battery its output voltage drops to around 90V:
 03400     04/03/2023 10:26:30   Discharge level            002 AH, SOC: 90%, I: 81A, L:3066, l:3557, H:3300, B:234, PT:018C, BT:023C, PV: 90291, M:Bike On
 03401     04/03/2023 10:26:30   Discharge cutback          58%

I don't think that 58% cutback means it was from the 14sg1067 because the MBB and BMS logs don't log the cut-back rate at the same time.
the Balance of that battery under load isn't great it is 234mV imbalance (note the B:234) entry, but when batteries are sagging that much a big imbalance isn't un-expected.

this is from the other battery:
 04430     04/03/2023 09:34:48   Discharge level            000 AH, SOC: 98%, I: 84A, L:3278, l:3718, H:3413, B:135, PT:021C, BT:024C, PV: 94135, M:Bike On
 04431     04/03/2023 09:34:48   Discharge cutback          34%

it is showing similar internal resistance, with around 84A discharge its pack voltage drops to 94V, it has decent balance with 135mV imbalance

So my quick analysis is that your batteries are just worn out, and sag a lot under load, and take action to protect against over discharge

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