RagingGrandpa Posted September 16, 2022 Share Posted September 16, 2022 (edited) Gotway / Begod / Extremebull seem to have a 146V system working already. Wow. Quote https://www.facebook.com/feichebiao/posts/pfbid0FYE9rTMGB3HsZfCPUjRPs1Mi32XYs7SUsP7SWMXiyPtFKiGqiiwJvtpne1vV5d4kl This is an exciting moment, and it is also the first time for me to reach the speed of 100kmh+ on a PEV ! Because the new design of #K6 has incomparable stability, I can safely unscrew the limit of the switch handle, which is great! K6: 3500WH / 146v ，Lithium iron phosphate safety explosion-proof Battery 3500wh *2 Motor Edited September 16, 2022 by RagingGrandpa 1 Quote Link to comment Share on other sites More sharing options...
meepmeepmayer Posted September 16, 2022 Share Posted September 16, 2022 (edited) This is with LFP cells. 146V is 40s, so for EUCs this would be 168V. Or if we go by voltage, even 36s is already way more than 146V and we already have 134.4V at 32s. There's no nice number in between. So not sure this translates to any EUC/4.2V Li-Ion cell vehicles in a meaningful way. Unless they want to switch to LFP. Or we really get 168V - a simple 4p battery is 2960Wh already, yes pleaseAnd they could use their old 84V stuff and just serialize it. 168V or bust! Edited September 17, 2022 by meepmeepmayer s, not p :-/ Quote Link to comment Share on other sites More sharing options...
RagingGrandpa Posted September 16, 2022 Author Share Posted September 16, 2022 (edited) It's easy to stick more batteries together and make a 600V pack... but it's hard to make a controller survive 600V. I'm just encouraged that they've managed an electronic design that withstands 146V. For our (more hazardous) NCM cells, we could envision 34s "142V" (142.8V) or even 35s "147V" with such components. Exciting! Edited September 16, 2022 by RagingGrandpa 1 Quote Link to comment Share on other sites More sharing options...
alcatraz Posted September 17, 2022 Share Posted September 17, 2022 (edited) It's great that they're working on it. But, I wouldn't want to be the guinea pig. A 3500Wh Lifepo battery must weigh a ton. 146V isn't divisible by 4.2v or 3.7v so it's hard to confirm the chemistry. Edited September 17, 2022 by alcatraz Quote Link to comment Share on other sites More sharing options...
Daley1 Posted September 17, 2022 Share Posted September 17, 2022 Quote More batteries,more weight,less manouvreable and a pain in the ass to lug around.I want speed, safety and distance in a portable wheel,not something the size of a couch and the weight of a 49rs linebacker! Quote Link to comment Share on other sites More sharing options...
enaon Posted September 17, 2022 Share Posted September 17, 2022 (edited) 1 hour ago, alcatraz said: 146V isn't divisible by 4.2v or 3.7v so it's hard to confirm the chemistry. liFePo4 is 3.2 nominal 3.65 charging end, so this looks like 40S I cannot see the point in all of this, near 100kph requires a battery technology breakthrough. on the plus side, we do not have any over 100kph face plants on YT yet, so there is room for greatness. on a more serious note, 146V on liFepo4 is not a new board, it is the master board with lifepo4, ~130 volt system, a master with no voltage drop but sudden death. Edited September 17, 2022 by enaon 2 Quote Link to comment Share on other sites More sharing options...
alcatraz Posted September 17, 2022 Share Posted September 17, 2022 59 minutes ago, enaon said: liFePo4 is 3.2 nominal 3.65 charging end, so this looks like 40S I cannot see the point in all of this, near 100kph requires a battery technology breakthrough. on the plus side, we do not have any over 100kph face plants on YT yet, so there is room for greatness. on a more serious note, 146V on liFepo4 is not a new board, it is the master board with lifepo4, ~130 volt system, a master with no voltage drop but sudden death. Thanks. Aha, so they charge to 3.65v. Then it comes out to a perfect 40S. Cool. Quote Link to comment Share on other sites More sharing options...
meepmeepmayer Posted September 17, 2022 Share Posted September 17, 2022 6 hours ago, enaon said: I cannot see the point in all of this, near 100kph requires a battery technology breakthrough. All you need for speed is a high voltage. So you chain more of the same battery cells together. No new type of battery needed. Quote Link to comment Share on other sites More sharing options...
meepmeepmayer Posted September 17, 2022 Share Posted September 17, 2022 Three possibilities on what this means: This means nothing for EUCs. We get LFP EUCs, like the RS Resolute. More weight or smaller battery compared to now, but no fires. 168V EUCs I hope for #3, and believe in #1. 1 Quote Link to comment Share on other sites More sharing options...
Popular Post Bizra6ot Posted September 17, 2022 Popular Post Share Posted September 17, 2022 6 hours ago, enaon said: on the plus side, we do not have any over 100kph face plants on YT yet, so there is room for greatness. You're not up to date 3 1 Quote Link to comment Share on other sites More sharing options...
OldFartRides Posted September 17, 2022 Share Posted September 17, 2022 “ Master Pro for sale….only 46 gentle k.’s on the clock. Only dropped once”. 1 Quote Link to comment Share on other sites More sharing options...
FlyingWigs Posted September 17, 2022 Share Posted September 17, 2022 6 hours ago, Bizra6ot said: You're not up to date Ouch! How badly was he hurt I wonder? Quote Link to comment Share on other sites More sharing options...
Popular Post enaon Posted September 18, 2022 Popular Post Share Posted September 18, 2022 (edited) 16 hours ago, meepmeepmayer said: All you need for speed is a high voltage. So you chain more of the same battery cells together. No new type of battery needed. this is an over simplification. Voltage helps to deliver amps, amps makes the wheel spin. A new tech on battery is needed if we are going to be talking about eucs going 100KPH somewhat safely, else they will not be eucs but halfbikes weight wize, and we all need to apologize to chooch. 15 hours ago, Bizra6ot said: You're not up to date you underestimate me I think. It was my way of saying that this fall was 99.8 KPH tops, he should try again. Edited September 18, 2022 by enaon 1 2 1 Quote Link to comment Share on other sites More sharing options...
mhpr262 Posted September 18, 2022 Share Posted September 18, 2022 On 9/16/2022 at 9:14 PM, RagingGrandpa said: Gotway / Begod / Extremebull seem to have a 146V system working already. Wow. Thats a scooter though, not an EUC... I dont even want to know what a 3.5kWh lifepo battery weighs. Quote Link to comment Share on other sites More sharing options...
meepmeepmayer Posted September 18, 2022 Share Posted September 18, 2022 On 9/17/2022 at 6:16 AM, alcatraz said: A 3500Wh Lifepo battery must weigh a ton. 7 hours ago, mhpr262 said: I dont even want to know what a 3.5kWh lifepo battery weighs. I was tempted to answer that it would not be prohibitively heavy to use LFP, because battery weight isn't even half of EUC weight, so how bad can it be. But then I did the math, and.. ouch! You're right! Assuming 3000mAh 3.2V per cell and 70g for a 21700 cell, the closest number is 360 cells (9*40, 3456Wh) which alone would weigh 25.2kg (55.6lbs). No thanks!! For comparison, 3600Wh with our Li-Ion cells is 192 cells and 13.4kg (30lbs). Nearly double the weight for LFP! Quote Link to comment Share on other sites More sharing options...
RagingGrandpa Posted September 19, 2022 Author Share Posted September 19, 2022 On 9/17/2022 at 1:22 AM, enaon said: 146V on liFepo4 is not a new board, it is the master board with lifepo4, ~130 volt system Hmm, could you help me understand why? I think the control board does not care what battery chemistry supplies it... 142V from a NMC pack or 142V from a LFP pack put the same demands on the control board. And the Master controller design uses FETs with a withstand of just 150V, therefore it's unlikely to be used in K06 @ 146V and very little headroom... and it's certainly not 'the same exact controller as Master' since K06 has two motors. Quote Link to comment Share on other sites More sharing options...
enaon Posted September 19, 2022 Share Posted September 19, 2022 (edited) 32 minutes ago, RagingGrandpa said: Hmm, could you help me understand why? due to the discharge characteristics on the lifepo4, they go near 3.2 and stay there if load is applied, they do not have a voltage drop curve like the lion, so this is a 3.2 X40 system when working. sure it will not be the excact same, but it is like 116 lifepo4 and 100 lion, same board tech, different battery chemistry. Edited September 19, 2022 by enaon Quote Link to comment Share on other sites More sharing options...
RagingGrandpa Posted September 19, 2022 Author Share Posted September 19, 2022 Ok, I remember that trend... RS Resolute with 116V working on standard RS controllers with 125V ratings. So perhaps this K6 is just a 150V-rated controller, not some new design. 1 Quote Link to comment Share on other sites More sharing options...
enaon Posted September 19, 2022 Share Posted September 19, 2022 (edited) 22 minutes ago, RagingGrandpa said: Ok, I remember that trend... RS Resolute with 116V working on standard RS controllers with 125V ratings. So perhaps this K6 is just a 150V-rated controller, not some new design. yes, the real problem with lifepo4 and unicycles is that a new, very good, algorithm must be applied to the the wheel to get the capacity state, voltage will not provide this info. So I think lifepo4 is far from really being an option on gotway. Edited September 19, 2022 by enaon Quote Link to comment Share on other sites More sharing options...
Bizra6ot Posted September 19, 2022 Share Posted September 19, 2022 @FlyingWigs Only dislocated shoulder and finger Quote Link to comment Share on other sites More sharing options...
wstuart Posted September 19, 2022 Share Posted September 19, 2022 Wow it looked like he even tried to run it out. That's some quick reflexes. I'm glad he's ok Quote Link to comment Share on other sites More sharing options...
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