Search found 705 matches

by zzoing
Jul 14 2019 8:23pm
Forum: Battery Technology
Topic: Best cheap spotwelder?
Replies: 14
Views: 658

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: 1610
Views: 182901

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: 1610
Views: 182901

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: 250

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: 1235

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: 121

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: 1610
Views: 182901

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: 1610
Views: 182901

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: 1610
Views: 182901

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: 91
Views: 4413

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: 91
Views: 4413

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: 871

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: 91
Views: 4413

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...
by zzoing
Mar 21 2019 5:09am
Forum: Battery Technology
Topic: New weldless battery system crowdfunfing project
Replies: 91
Views: 4413

Re: New weldless battery system crowdfunfing project

Can you please work on an elastic airogel. That's a cool idea for double and treble spring, is it still the same weight of spring to compression and conduction ratio? For a weight optimized all weather battery box, the box frame and metal elements weigh at least 4g-5g per battery compartment, so a 1...
by zzoing
Mar 19 2019 6:59am
Forum: Battery Technology
Topic: What battery to choose after your last one burned your house.
Replies: 94
Views: 4566

Re: What battery to choose after your last one burned your house.

Good info flippy! I tried to find a PTC specification from a top 18650 company which states PTC limits and statistics, that's the most information I have for the moment.
by zzoing
Mar 19 2019 2:28am
Forum: Battery Technology
Topic: New weldless battery system crowdfunfing project
Replies: 91
Views: 4413

Re: New weldless battery system crowdfunfing project

Hey, thanks Blue Sword! I saw your suggestion regarding spring design, except that the current is too high for a wire spring conductor type design, there is a compromise in between total weight and current per spring. you and your spring conductors;) :wink: i see a symphony conductor like zebedee. I...
by zzoing
Mar 15 2019 5:21am
Forum: Battery Technology
Topic: What battery to choose after your last one burned your house.
Replies: 94
Views: 4566

Re: What battery to choose after your last one burned your house.

The PTC in Panasonic are pretty effective. Try shorting a panasonic from 2019.
by zzoing
Mar 09 2019 1:23pm
Forum: Battery Technology
Topic: New weldless battery system crowdfunfing project
Replies: 91
Views: 4413

Re: New weldless battery system crowdfunfing project

I'll be sampling a preview version of the engineering animations in about 14 days, it's about 780 megs of 3d files with rotating orbital cameras and transform deconstructions, because i have to illustrate it very professionally to have some robo arms to do the box building at a price that is 15% the...
by zzoing
Mar 07 2019 10:01pm
Forum: Battery Technology
Topic: New weldless battery system crowdfunfing project
Replies: 91
Views: 4413

Re: New weldless battery system crowdfunfing project

Hey that's very cool. If you re-use a battery box 2-5 times, the cost is 50% - 20% compared to a spot weld battery. The fixed cost of a battery box materials is 15-20 cents for every cell, plus 15 c labour, 10 c tax, 20 c shipping and 10 c for the bms, the rest is things like electricity and automat...
by zzoing
Mar 06 2019 11:49am
Forum: Battery Technology
Topic: New weldless battery system crowdfunfing project
Replies: 91
Views: 4413

Re: New weldless battery system crowdfunfing project

Lithium AR as in Argon? Can you brew tea with it? You are cruel! "Vruzend, you scary! run run away!" admittedly that is what I thought about putting them on a bike. They are awesome for their initiative. I did clock them again 2 years after to see what their contacts are even like, except that the p...
by zzoing
Mar 05 2019 10:26pm
Forum: Battery Technology
Topic: New weldless battery system crowdfunfing project
Replies: 91
Views: 4413

Re: New weldless battery system crowdfunfing project

I hope those batteries you have become ubiquitous i dont know why 18650 and 21700 are in teslas and ebikes. Send me the specifics i want them. Its would be cool to go to india with an empty battery box, find the batteris there and travel on a hero emotorbike.
by zzoing
Mar 05 2019 10:05pm
Forum: Battery Technology
Topic: New weldless battery system crowdfunfing project
Replies: 91
Views: 4413

New weldless battery system crowdfunfing project

Hi there, i became interested in designing a weldless battery system thanks to the genius discussions on this forum in about 2014, and i built a fun prototype which i smashed around and tested at 7.5 C-rate on used lipos. It was robust but it wasn't cheap enough to justify building kits like Vruzend...
by zzoing
Feb 04 2019 11:57pm
Forum: Battery Technology
Topic: Need help with charger problem. 21V Needed
Replies: 6
Views: 328

Re: Need help with charger problem. 21V Needed

https://fr.aliexpress.com/item/100-240V-DC21V-2A-polymer-lithium-battery-charger-DC-5-5MM-2-1MM-Portable-Charger-EU/32777214791.html?spm=a2g0w.search0604.3.131.72781393ncxU9W&ws_ab_test=searchweb0_0,searchweb201602_4_10065_10068_319_10892_317_10696_10084_453_454_10083_10618_10304_10307_10820_10821_5...
by zzoing
Jan 28 2019 10:12pm
Forum: Battery Technology
Topic: Cap cooling of 18650, thermal output graphs?
Replies: 10
Views: 757

Re: Cap cooling of 18650, thermal output graphs?

Thanks, that's great information. Am studying the graphs. Some varieties of Boron Nitride is a good unobtanium thermally conductive electrical insulator. It's a bit difficult to find but it would be fun to have some at home: https://www.accuratus.com/boron.html here is a video about cap cooling. htt...
by zzoing
Jan 28 2019 2:10pm
Forum: Battery Technology
Topic: Which battery chemistry for extreme climates?
Replies: 37
Views: 1583

Re: Which battery chemistry for extreme climates?

Couldn't you use the batteries as a passive radiator resistance loop by passing a current through them, i.e 12v 40A through all the caps, as if they were a nickel-chrome radiator wire? They warm up more uniformly through the caps than the sides of the cylinder. Perhaps you can warm the batteries in ...