11-12-2021, 01:13 PM | #11 |
Gone Wild
Join Date: Jan 2013
Location: Saint Petersburg, FL
Posts: 2,089
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Re: Introducing CALB cells -and- is the switch to 72v worth it?
Glad I could help.
You could use that extra space for a trunk of sorts. I use the extra space for a 12v lithium battery and 12v and 56v chargers and still have space left over. |
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11-12-2021, 01:17 PM | #12 |
Gone Wild
Join Date: May 2012
Location: Rio Verde, Az
Posts: 7,193
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Re: Introducing CALB cells -and- is the switch to 72v worth it?
Beer Cooler!
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11-15-2021, 09:27 AM | #13 |
Gone Wild
Join Date: Sep 2019
Posts: 154
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Re: Introducing CALB cells -and- is the switch to 72v worth it?
You will also increase your range going with a 72v system. I went 72v mainly for range and plan to keep the mph 25-30 depending how she feels. I got the biggest AH I could fit and made the switch to the 6kw AC system so I can get max range. I dont have a ton of storage space now tho lol
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11-15-2021, 10:25 AM | #14 |
Gone Wild
Join Date: Jul 2012
Location: Central FL
Posts: 1,195
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Re: Introducing CALB cells -and- is the switch to 72v worth it?
Yeah I’m good on range with 200ah of usable battery (I was good with the previous huge Trojans as well). I’m convinced for the time being that staying at 48v is right for me. If I desire more range in the future I’ll bite the bullet and upgrade to the Navitas AC motor/controller conversion. Then could switch to 72v after that much easier.
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12-01-2021, 12:38 PM | #15 |
Gone Wild
Join Date: Jul 2012
Location: Central FL
Posts: 1,195
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Re: Introducing CALB cells -and- is the switch to 72v worth it?
Accidental post in the wrong thread, will be starting a separate build thread as this doesnt seem like the appropriate place. But Long story-short, bought a precedent and moving all the Lithium plans to it. They fit great in the battery tray too.
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12-24-2021, 11:24 AM | #16 |
Gone Wild
Join Date: Jan 2014
Location: South Jersey
Posts: 623
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Re: Introducing CALB cells -and- is the switch to 72v worth it?
Any update on the performance of this pack? How the discharge rate? Did you use a bms and what charger do you use?
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12-28-2021, 11:45 AM | #17 | |||||
Gone Wild
Join Date: Apr 2019
Location: Canada
Posts: 425
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Re: Introducing CALB cells -and- is the switch to 72v worth it?
Quote:
https://www.hpevs.com/lithium_batter...LB_CAM_72.html They use an ORION JR BMS as well. The HPEVS kits are probably the best out there. Premium EV stuff and not some wonky weird fet based BMS that restricts current. Quote:
3C discharge is also VERY nice. Some of the drop-in units I have seen appear to be using low C solar wall batteries and some I would even question if they are recycled batteries from Electric Bus units. This has happened to many people in the EV world ordering "cheap" batteries... Recycled bus batteries arrive. Quote:
Quote:
You up your voltage game you lower the current needed to produce the same amount of watts or you increase your watts. Just to give you an example... @ 48VDC nominal I can get a Navitas TAC2 600a and 5kW induction motor on most TXT frames to about 38MPH with a lithium setup. With a 72VDC nominal I can get that same setup on the same frame going about 48mph+. I have seen units pushed and gotten 51mph but, that is NOT with LiFePO4 and a different battery tech and an unsafe voltage for the TAC2 (80V and NOT supported by Navitas!). Quote:
Its worth it if your traction controller can handle the voltage. For most people who are doing lithium they have Navitas AC (traction inverters) setups... which out of the box supports 48VDC and 72VDC nominal. So, for them to go straight to 72VDC isn't hard. |
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01-02-2022, 09:15 AM | #18 | |
Gone Wild
Join Date: Jul 2012
Location: Central FL
Posts: 1,195
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Re: Introducing CALB cells -and- is the switch to 72v worth it?
Quote:
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01-02-2022, 09:17 AM | #19 | |
Gone Wild
Join Date: Jul 2012
Location: Central FL
Posts: 1,195
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Re: Introducing CALB cells -and- is the switch to 72v worth it?
Quote:
As far as 72 volt, it just wasn't something that made sense for me to do right now, plus I have some future plans that require 48v that I will be talking about at a later date. But to convert to 72V I would need at a minimum a battery tub conversion kit, 8 more lithium cells, a new BMS, new controller, motor, voltage reducer and solenoid. Those added up cost thousands and while the extra efficiency would be very nice, I think I'm somewhat making up for that with these large 200ah capacity cells to get farther range. I'm happy with the 20mph I'm currently getting so increased speed isn't appealing to me at the moment. My Series FSIP controller off the DS will not handle 72v and the D&D motor is Series so those would not swap over without converting my Precedent to a Series cart. Instead, those components will be sold on the DS and I'll keep using the stock components on this Precedent for now. Not saying I wont ever consider 72 volt in the future - but for now it just makes a lot more sense to stick to 48v. |
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01-19-2022, 11:09 AM | #20 | |
Gone Wild
Join Date: Sep 2019
Posts: 154
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Re: Introducing CALB cells -and- is the switch to 72v worth it?
Quote:
Watts to give on a 100ah example. 72v 100ah gives you 7200 watts. 48v 100ah gives you 4800 watts. 72v is also more efficient. Also if you switch to a AC motor setup when switching the stuff out to handle 72v you gain more efficiency. I went 72v because I knew I would want too anyway and I wanted to setup for max range OR fun. Put a 72v 150ah and the navitas AC kit in my onward. |
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