Search found 717 matches

by zzoing
Sep 27 2019 3:51am
Forum: E-Bike General Discussion
Topic: Carbon-Fiber Torque Arm
Replies: 0
Views: 136

Carbon-Fiber Torque Arm

Hey folks, I have figured out how to make a carbon fiber torque arm. Some of you have probably previously welded one of these and think "duh that's obvious I already did that"... it took me ages to figure out that this is the best way. Advantage : Micron accuracy, efficient with time, can be glued s...
by zzoing
Aug 03 2019 7:47pm
Forum: Battery Technology
Topic: Need Charger Recommendation
Replies: 14
Views: 345

Re: Need Charger Recommendation

Tumich has cells on this forum. Bms is recommended for low voltage detect also by the way. They are cheap vheck alixpress.
by zzoing
Aug 03 2019 7:43pm
Forum: Battery Technology
Topic: How to brake using electric motor?
Replies: 5
Views: 276

Re: How to brake using electric motor?

You need a specific controller for the brushed motor which has regen. The regen resistance may be variable. A high level can stop a vehicle on a medium slope say 7%. Its a complement for standard brakes.
by zzoing
Aug 03 2019 2:40am
Forum: Battery Technology
Topic: Need Charger Recommendation
Replies: 14
Views: 345

Re: Need Charger Recommendation

You can buy bms which have an led for every group but they draw current at idle. You can use a spare bms 15pin molex and wired soldered to the cells and check the pins if you are worried. You can find/ make 14 volt cubes for 14 usd and place them on a 15pin molex .Everyone, even noobs, uses a bms. U...
by zzoing
Aug 03 2019 2:35am
Forum: Battery Technology
Topic: 52V battery dropped to 3.3v output, what to check?
Replies: 11
Views: 372

Re: 52V battery dropped to 3.3v output, what to check?

Just take care not to short the metals and measure all the bits you can see... you will get an idea. If you can find the first group with battery negatives, on the end, thats -, andcsearchbyour way up from there with the meter, it shout go 3.5-7-10-13 multiples of 52/13 or whatever.
by zzoing
Jul 31 2019 1:52pm
Forum: Battery Technology
Topic: Thread for new battery breakthrough PR releases
Replies: 1625
Views: 192701

Re: Thread for new battery breakthrough PR releases

It's faster to dig lithium reserves than build battery factories so the price of raw lithium has dropped recently because mining activity is high.
by zzoing
Jul 30 2019 3:18am
Forum: Battery Technology
Topic: 18650 flammability by a shell vaporizing test
Replies: 4
Views: 207

18650 flammability by a shell vaporizing test

I set fire to a a Sanyo cell from 2018 in a controlled environment, I melted through the steel using a 100A current, by placing some battery terminals on either side of the negative terminal. The battery flashed as the steel and copper vaporized, and then it started burning the lithium inside. It wa...
by zzoing
Jul 29 2019 9:59pm
Forum: Battery Technology
Topic: best fireproof case/ system or DIY to store/charge lipo liion safest way
Replies: 42
Views: 1266

Re: best fireproof case/ system or DIY to store/charge lipo liion safest way

those are interesting links thx for that . correct me if i im wrong but adding cement is just so that the metal do not turn red right or( transfer heat to adjescent battery right if multiple pack)? the amout of flames that would go out in the end woud be the same as if put in the amo bow without ce...
by zzoing
Jul 29 2019 9:29pm
Forum: Battery Technology
Topic: best fireproof case/ system or DIY to store/charge lipo liion safest way
Replies: 42
Views: 1266

Re: best fireproof case/ system or DIY to store/charge lipo liion safest way

those are interesting links thx for that . correct me if i im wrong but adding cement is just so that the metal do not turn red right or( transfer heat to adjescent battery right if multiple pack)? the amout of flames that would go out in the end woud be the same as if put in the amo bow without ce...
by zzoing
Jul 29 2019 9:17am
Forum: Battery Technology
Topic: best fireproof case/ system or DIY to store/charge lipo liion safest way
Replies: 42
Views: 1266

Re: best fireproof case/ system or DIY to store/charge lipo liion safest way

is this the exact title or just words of searching that came to your mind cause i see alot of vid but none with fireplaceinsulator in the list it gives me. Sorry I thought that they were easier to find. maybe it was "battery bunker" ... steel box lined with thermal plasterboard, pyrocrete, refracti...
by zzoing
Jul 28 2019 7:03am
Forum: Battery Technology
Topic: best fireproof case/ system or DIY to store/charge lipo liion safest way
Replies: 42
Views: 1266

Re: best fireproof case/ system or DIY to store/charge lipo liion safest way

check youtube for "make a lithium charging box" fireproof... Steel box with high temperature fireplace insulator bricks, vents, and a smoke alarm on top. total budget - 35.
by zzoing
Jul 14 2019 8:23pm
Forum: Battery Technology
Topic: Best cheap spotwelder?
Replies: 19
Views: 1213

Re: Best cheap spotwelder?

Have just found this funny welder from China. Looks pretty crazy. https://www.aliexpress.com/item/3282464 ... 55b7YiGTF2
by zzoing
Jun 26 2019 2:29am
Forum: Battery Technology
Topic: Thread for new battery breakthrough PR releases
Replies: 1625
Views: 192701

Re: Thread for new battery breakthrough PR releases

Cool concept! Perhaps they have flown it for a minute, that would be cool too. BMW has signed something with them, although i am skeptical. It has to fly and land precisely with 5 motors, and have same energy as 5 roadsters to fly for just 2 hours, 420kwh, so every fuel cell is at least a 75kwh fuel...
by zzoing
Jun 26 2019 2:22am
Forum: Battery Technology
Topic: Thread for new battery breakthrough PR releases
Replies: 1625
Views: 192701

Re: Thread for new battery breakthrough PR releases

Cool concept! Perhaps they have flown it for a minute, that would be cool too. BMW has signed something with them, although i am skeptical. It has to fly and land precisely with 5 motors, and have same energy as 5 roadsters to fly for just 2 hours, 420kwh, so every fuel cell is at least a 75kwh fuel...
by zzoing
May 27 2019 9:21am
Forum: Battery Technology
Topic: Mounting a battery in a gas tank
Replies: 3
Views: 321

Re: Mounting a battery in a gas tank

Nice project!!! schmoov bike dude! Welcome to the forums. I can mostly see the bike, because the motorbike gas tank is not lit up... Would have a clearer image if you did some pan and zoom work with the camera/ some big photos for the post. Nice project, that bike must be a fun ride :) .
by zzoing
May 27 2019 6:16am
Forum: Battery Technology
Topic: Panny or Sanyo?
Replies: 44
Views: 1658

Re: Panny or Sanyo?

Hm that's a bit worrying, I've just bought a load of GA's. https://endless-sphere.com/forums/viewtopic.php?t=85113 sais that they do 500 cycles fine, and up to 800 before losing 20% of their capacity. Panny said that they would phase out the Sanyo brand, for the purpose of efficiency, they have acce...
by zzoing
May 27 2019 5:35am
Forum: Battery Technology
Topic: Exceeding BMS amper rating... does it switch off or limit?
Replies: 1
Views: 164

Exceeding BMS amper rating... does it switch off or limit?

I have two cheap 14s BMS from China. 30A balancing and 40A unbalanced. I am not sure which to use. The controller is 35A. Will it switch off the BMS? Will the BMS limit the output at 30A? I have fried a balancing board before, that's why I bought the unbalancing one. Currently I am running an 112 pa...
by zzoing
May 05 2019 7:28am
Forum: Battery Technology
Topic: Thread for new battery breakthrough PR releases
Replies: 1625
Views: 192701

Re: Thread for new battery breakthrough PR releases

Aluminium energy sounds cool because it is easy to recycle. I researched Alevo because the Innolith advertisement video is a bit suspicuous and oriented towards people who don't understand technology, the staff and labs don't appear in the innolith video, it's girls skipping in sunny green wheat fie...
by zzoing
Apr 26 2019 5:59am
Forum: Battery Technology
Topic: Thread for new battery breakthrough PR releases
Replies: 1625
Views: 192701

Re: Thread for new battery breakthrough PR releases

Perhaps there can be a new thread called "fake battery company list" ... Especially for completely unkown companies, so that we can find out the director's previous history... And for any company that doesn't have a video to back up their claims whilst searching for investors. If i had a world chang...
by zzoing
Apr 25 2019 1:31am
Forum: Battery Technology
Topic: Thread for new battery breakthrough PR releases
Replies: 1625
Views: 192701

Re: Thread for new battery breakthrough PR releases

Oh cool, Innolith is very fantastic. When a company devides prices by 20 while multiplying performance by 4, but doesn't have any commercial partners, tech demo's, patents, videos, photos, presentations, products, statistics, chemistries... you know they are lying to rich western and asian investors...
by zzoing
Mar 28 2019 11:30pm
Forum: Battery Technology
Topic: New weldless battery system crowdfunfing project
Replies: 84
Views: 5255

Re: New weldless battery system crowdfunfing project

Some varieties of lexan have an stiff coating which reacts with water and oil. ABS and HDPE, i.e. lego and bottle plastic are the other plastics with see through grades that i know. ABS is cool because 3d printers can add pieces using abs slurry.
by zzoing
Mar 25 2019 11:02pm
Forum: Battery Technology
Topic: New weldless battery system crowdfunfing project
Replies: 84
Views: 5255

Re: New weldless battery system crowdfunfing project

What do you think about polycarbonate? it's one of the highest Tg plastics, but some forms of PC have scratch proof coatings which crack from water and oil, and there are different makes of PC. I wonder if all polycarbonate is to be ruled out for structural pieces of a motorbike/battery box? There a...
by zzoing
Mar 25 2019 10:55pm
Forum: Battery Technology
Topic: I designed a simple 3D-printed solderless battery pack.
Replies: 10
Views: 991

Re: I designed a simple 3D-printed solderless battery pack.

That's a very cool design!!! seriously, it's a new approach. best i've seen. If I had seen this some time ago, I would have tried to optimize and study it. You'd just have to put a spring in there and a way to fasten the screws. a slot in a the lids for a carbon fiber bar would do it for 1 gram extr...
by zzoing
Mar 21 2019 5:14am
Forum: Battery Technology
Topic: New weldless battery system crowdfunfing project
Replies: 84
Views: 5255

Re: New weldless battery system crowdfunfing project

Silver would get very worn out for an electrical contact. In the industry they have fairly precise micron widths and alloys for the best plating there are probably ASTM grades that you can have if you invest in equipment for it. Nickel micron astm search gives this page https://advancedplatingtech.c...