Endless Sphere

.My Ant bms/battery only charges to 4.158 per cell. Any tips on getting it to charge up to the full 4.20v per cell? 20s2p SPIM08HP battery..... Seriously ?..why ? There will be no noticeable change in performance from that 0.8 volt increase of pack voltage,..but you will likely seriously reduce the...

Most of the stock trolling motors are designed around a “ trolling” spec use. That means they are optimised for low speed use on mono hull fishing boats, often with compromised “weed release” prop designs People do use them for other uses, but to get the best efficiency/ speed for something like a s...

Perhaps you need to see an eye doctor. Could it be that you’re color blind not only to green , but also to red (DDs red-letter comments). You never responded to portions of his post directed to your comment(s). We obviously have a terminology/ language problem here There was nothing in DDs red comm...

AW, Did you watch the video ?
.. that was much more than an electrical/ ancilliary fire !
It went off like a truck full of ammunition !

eMark wrote: ↑

May 04 2022 9:45am

Apparently a lipo pouch cell battery offers no avantage for an e=bike DIY build ?

??.. how many have you built ?
I can think of several advantages of pouch cells for ebikes.

Ahh !... Hamilton Vic. Thats a little outside my morning constitutional !..sorry.
But if you cannot get the battery to function,..can you find an alternative battery/ voltage source , you could hook up to test the controller and motor.?

You need to be realistic and aware of retail pricing for similar cells....<$200/kWh...pre assembled, with warranty.
https://signaturesolar.com/eg4-8-cell-p ... -6v-100ah/

Never mind 7 m wide....how deep was it ? Assume you have removed and dried the battery ? Some electrical fault tracing skills are needed. That should be easy to check with a MMeter etc to see if it is still charging or a fuse is blown. Most likely you have drowned the controller in the base of the b...

.Is my figuring improving ? No ! You are still thinking that cell capacity and voltage have a linear relationship ( straight line graph)... when they dont. And you dont seem to read replies . Why dont you just stick to using the data from Molicel ? Your 14s 9p example would have 1,953 Wh ( 126 cell...

Thanks for the link AW.. Yes there are many ways for an EV fire to start, but Bollore specificly state these cells will not burn and are immune from thermal runaway. I think that video suggests otherwise. Incidentally, 2 more similar buses have also burned in Paris since the one in the video, and th...

Using Molicel’s data from their spec sheet, each cell has a “typical” capacity of 15.5 Wh. So a pack using 196 cells ( of any configuration ) will have ..15.5 x 196 = 3038 Wh (3.038 kWh) BUT, the usable capacity will depend on what charge voltage is used , and what LVC is set . And at $980 cost, is ...

machanic wrote: ↑

May 02 2022 4:13pm

Not stripped, almost non-existent the hole is too large for the tap so threads are shallow. ....

Thats most likely because they are at the bottom of a “blind” tapped hole where the end threads on the tap would be tapered off.

A recent spate of electric bus fires in Paris, Europe, has brought to attention the battery tech used on those vehicles. https://www.lemonde.fr/en/france/article/2022/04/29/paris-suspends-electric-bus-fleet-after-two-fires_5981956_7.html The vehicles are made by “Blue Bus” by the Bollore company and...

....... Shouldn't the nominal (50%) pack voltage for both be the same -- 3.60V .. ....Can we agree on 3.600V as nominal voltage for figuring Wh(and kWh) . No, ..that would only be correct if the voltage to capacity relationship is linear, and the same with different discharge loads.....which it is ...

if only it were true !

calab wrote: ↑

May 01 2022 8:40pm

Opt for fake plants in your front and back gardens.

Or just rock it all

You do know that all plants adsorb CO2 ?
Fake ones generate CO2 during manufacture !

.Can my figuring be right with one P42A 4000mAh rated at only .072kWh (72Wh) ... No !.. A 4.2Ah cell has a capacity of 4.2Ah x 3.8v = 16 Wh. (0.016 kWh) So yo would heed 63-63 cells for 1 kWh. ...even t $5 per cell that would imply $312 /kWh PS... ...DD did not saythose cells were from a Volt, just...

I paid 140$ a kWh for brand new Chevrolet cells from a Chevrolet dealer. So we are at 2x that for a kWh. New, available, not salvage and not " off branded". ... NOT recycled, or 2nds. ... ... 140$ a kWh. I bought 9. Easy peasy to find if you know where to look, but no, not retail. I still...

speedmd wrote: ↑

Apr 26 2022 8:17am

....
....One thing for certain, some seriously big upgrades in drivability should be on the way shortly with the changes. .......

?? What aspects of “drivability” are you thinking a cell change would improve ?

. The 1.6L V6 turbocharged engine, along with its power unit, can produce around 1050 horsepower. ........... .....The weight of Formula One cars has never been constant. They have been changing yearly since 2008. The cars have been getting heavier year after year. From 2008 when the Formula One ca...

Location ?
Shipping charges ?

So, the “next state of the art” FE will weigh double a F1 car, and have less than half the available power ?? 4 WD wont add much as they will still be managing the power to reach the finish They still rely on street circuits ( short straights and many sharp corners) to keep the speeds low and maximi...

$70kWh was Elan's target for his 4680 cell NOT for a 21700 cell. The e-automotive target is $60kWh in order to be competitive with combustion engines (e.g. Toyota, Honda). https://www.greencarreports.com/news/1132072_report-60-kwh-battery-pack-price-will-make-evs-cheaper-than-combustion $60kWh shou...

Yeah ... wake me up when you can actually buy quality cells at a price that even comes close to that ! Possibly implying that the quality of 21700 cells are lagging even farther behind the quality of 18650 cells. ...... No... simply saying that for any equivalent quality cell, ( not 2nds , salvaged...

Nore that the trade mark “R” is not on the new ones ?