John Deere E-Gator rebuild(Picturestory)

Electric cars, trucks, ATVs, NEVs - things bigger than a motorcycle.
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E-Chopper   10 W

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Re: John Deere E-Gator rebuild(Picturestory)

Post by E-Chopper » Apr 02 2019 12:54pm

John thank you for the part- link i did not know that link before !!!!

I dont use a BMS on my Li-on Battery but i balance it before i solder them .
May the future will show how long this Accu will live without BMS :flame: !!!
So if you have enough money you better use a BMS

To our questions..........

My Curtis Sep-EX Controller stop´s if the Battery is longer time under 37,5 Volt thats a safty feature, i test it unintentionally on a long trip :lowbatt: so the Controller stops the Gator long before the Battery is damaged .

The E Gator Controller-Software - default settings are set for Acid Batterys thats why i use a a s13(54,6 Volt) Lion Cells :idea: .
I know that the Max possible Voltage for this Controller is 65 Volt but the Controller software default Seeting is set lower so may it is possible that the Controller dont work with a s15 lion (63 Volt) i dont test and know that :?: .

Also i could not change the Settings with the Curtis programming Handbox because this Controller is Password protected .
So you must work with the Factory Controller Settings(Acid Battery Settings) !

So if your Gator is Speed limited to 10km or 25 Km the only way to manipulate the Speed is to change the Tachopol -Sensor- Wheel that´s the little Wheel on the DC Motor (fewer Magnetpoles the faster the Motor rotates) :evil: .

so more or less The Photo story comes to an end .

I mount a cheap Amazon Radio(work well!) that had speakers inside and i mount 12Volt Socket outlet for connecting all kind of 12 Volt equipment Image


and i weld roof rack and mount it on the roof now i had more storage place .
Image

John ....my gator is a first Generation Modell V.1.0 i dont know if newer TE _Gator had the same controller and wiring but on mine i dont had to change any Wiring the only thing i change is to mount a Battery Switch and a 250 Amp ANL Fuse !!!!
And i change the charger to a Lion 10 Ampere Charger because the old charger is a acid charger and not for Lion Voltage !!!

Image
i change the originally 48 Volt Socket against this Default 230 Volt Socket outlet (Picture) the little Battery switch is not the Main Switch it is for the DC-Side of the Lion-Charger.
I only had to connect the wires from the old 48Volt Socket to the DC-Side of the Charger .

on this out of focus Photo you can look at the charger it is now mountet inside so i can connect the Vehicle Directly to every 230V Socket anywhere (In Europe :lol: )
Image


greetings
Martin
"Thunder is good,Thunder is impressive;
but it is Lightning that does the work !
-Mark Twain

Ribfeast   100 mW

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Re: John Deere E-Gator rebuild(Picturestory)

Post by Ribfeast » Apr 02 2019 10:22pm

Looks great!
I think my Toro has the same speed limit - 25k forward, 10k reverse. Probably the same Sevcon controller too.

Might pay to test your individual cells occasionally in case you get a low one, I had one of mine go low prematurely last week and the BMS alerted me to it before I caused damage.

Love the idea of a radio!

JNorth   1 mW

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Re: John Deere E-Gator rebuild(Picturestory)

Post by JNorth » Apr 05 2019 11:05pm

Thanks for the responses.
Got my eGator in from winter storage today.
The controller in mine is a Curtis PMC Sepex 1264-5403
I can only guess this is the original Deere one.
My plan for batteries is to assemble (or buy) a pack out of a Nissan Leaf salvage car. The Leaf seems a better choice than the Chevy Volt batteries.
I will put on a BMC.
Interested to learn John Deere password protected the controller....going to see if I can 'acquire' the password.
Still researching and learning. What is the purpose of the 500 amp shunt you reference?
Thanks again
John

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Re: John Deere E-Gator rebuild(Picturestory)

Post by JNorth » Apr 07 2019 7:19am

You've got me excited about going to lithium (sometime this year).

If you are trying to 'age' your machine this might help

1999 Model (SN W0E4X2E001001-001705)
2000 Model (SN W0E4X2E001706-003212)
2001 Model (SN VGE4X2E010001-010274)
2002 Model (SN VGE4X2E010275-010787)
2003 Model (SN W0E4X2E011001-011389)
2004 Model (SN W0E4X2E011390-011771)
2005 Model (SN W0E4X2E011772-012068)

Taken from
https://partscatalog.deere.com/jdrc-ser ... cale=en-US

and for all gators
https://www.scribd.com/document/3307829 ... okup-table

Ribfeast   100 mW

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Re: John Deere E-Gator rebuild(Picturestory)

Post by Ribfeast » Apr 08 2019 7:40pm

The shunt tells the BMS how much current you are pulling (or charging), so it can then calculate your state of charge from how much current was removed from the pack. Most BMS including the Zeva use them.
My lithium battery peaks in the low 300A range, hence the need for the larger 500A shunt.

A shunt is basically a giant resistor, of a very low resistance, whose value is precisely known, and by measuring the tiny voltage drop across it the current can be calculated.

JNorth   1 mW

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Re: John Deere E-Gator rebuild(Picturestory)

Post by JNorth » Apr 11 2019 9:56pm

Bought a used 2015 Nissan Leaf battery and it's arriving Mon or Tues.
48 modules making up a 24 kw battery.
planning on using 7 modules to make a nominally 48 volt battery for the gator initially.
Car was driven into the shop before dismantling. Had a 2/3 charge.
Thinking I'll initially play with the seven module setup, no bms. Just have to find a charger.

Ribfeast   100 mW

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Re: John Deere E-Gator rebuild(Picturestory)

Post by Ribfeast » Apr 15 2019 12:21am

That should be a weapon! They have a fast discharge rate compared to the LiFEPO4 cells in mine!

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E-Chopper   10 W

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Re: John Deere E-Gator rebuild(Picturestory)

Post by E-Chopper » Apr 16 2019 1:25pm

Thats sounds really good !!! :bigthumb:
"Thunder is good,Thunder is impressive;
but it is Lightning that does the work !
-Mark Twain

JNorth   1 mW

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Re: John Deere E-Gator rebuild(Picturestory)

Post by JNorth » May 10 2019 8:33pm

Posted a writeup on my eGator conversion in a separate article. Thanks to everyone who went before me that I learned from!

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methods   10 GW

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Re: John Deere E-Gator rebuild(Picturestory)

Post by methods » Nov 07 2019 7:38pm

Great thread.
Thanks for taking the time to post.

-methods
Increasing battery voltage and controller current limit will result in a non linear experience

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E-Chopper   10 W

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Re: John Deere E-Gator rebuild(Picturestory)

Post by E-Chopper » Nov 08 2019 2:29am

Thank you! Little update: Meantime the e- gator still work fine the, the accu still in good condition, the Panasonic cells worth the money.. In summertime my gas-car make hollyday and in wintertime the gator had a break .

Greetings
Martin
"Thunder is good,Thunder is impressive;
but it is Lightning that does the work !
-Mark Twain

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methods   10 GW

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Re: John Deere E-Gator rebuild(Picturestory)

Post by methods » Nov 08 2019 3:11am

jealous

I spent all my money on Whisky, Women, and Lawyers.
None left for an 18650 project

Live the Dream

-methods
Increasing battery voltage and controller current limit will result in a non linear experience

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