Search found 115 matches

by want to build
Jul 29 2019 2:53pm
Forum: Battery Technology
Topic: whick lock (empty) case for diy lion do you suggest
Replies: 2
Views: 172

whick lock (empty) case for diy lion do you suggest

hi before i was thinking of placing my 13s4p in a bag but i realise that it would be much more practical to have it in a case i can lock on my bike. i need a base empty , if possible metal or something good against fire and rain. it need to lock with a key and have the support i do my own old style ...
by want to build
Jul 29 2019 1:27pm
Forum: Battery Technology
Topic: best fireproof case/ system or DIY to store/charge lipo liion safest way
Replies: 42
Views: 1269

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 want to build
Jul 28 2019 3:50pm
Forum: Battery Technology
Topic: best fireproof case/ system or DIY to store/charge lipo liion safest way
Replies: 42
Views: 1269

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. is this the exact title or just words of searching that came to your mind cause i see alot of vid but none with fireplaceinsul...
by want to build
Jul 25 2019 5:07pm
Forum: Battery Technology
Topic: best fireproof case/ system or DIY to store/charge lipo liion safest way
Replies: 42
Views: 1269

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

AND i build bigger batteries usually with a strong alu case with a alu tape vent hole that can blow out in case of overpresiure or fire and direct the flames to the ground or a direction where it cant damage other things. the same principle is used with storing gases like propane or LPG in cars whe...
by want to build
Jul 24 2019 11:11pm
Forum: Battery Technology
Topic: best fireproof case/ system or DIY to store/charge lipo liion safest way
Replies: 42
Views: 1269

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

hum
someone said that dropped in water it would not smoke exact? how many times the volume of the battery pack does it need to be dropped in ?
Would a 400wh pack suspended in the higher part of an ammo case filled with water under be enough?
by want to build
Jul 23 2019 10:51pm
Forum: Battery Technology
Topic: best fireproof case/ system or DIY to store/charge lipo liion safest way
Replies: 42
Views: 1269

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

does any one knows what filter could filter the toxic fumes ? maybe if added on the outside of an ammo case it could be a solution?
by want to build
Jul 22 2019 5:24pm
Forum: Battery Technology
Topic: best fireproof case/ system or DIY to store/charge lipo liion safest way
Replies: 42
Views: 1269

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

the auto sand spiller in the vid below is ingeniuous.

what do you think about simply burring the batterypack inside a large metal toolbox filled with sand even on top of the pack?
by want to build
Jul 22 2019 5:20pm
Forum: Battery Technology
Topic: best fireproof case/ system or DIY to store/charge lipo liion safest way
Replies: 42
Views: 1269

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

DO NOT USE WATER TO EXTINGUISH A LITHIUM FIRE. My advise. Throw the battery out the window if possible or out into the open, get far away and call for help. Yes sand helps too. But only if you apply it at the very beginning of the fire and only for small fires. Hydrofluoric acid will also stick to ...
by want to build
Jul 22 2019 5:10pm
Forum: Battery Technology
Topic: how to seal the positive "Y" end of a diy batt
Replies: 16
Views: 657

Re: how to seal the positive "Y" end of a diy batt

I could solder that easily, you can too but you will need to pay attention to mechanical stress after it's made. Why isn't it soldered already? Wrap the 3 ends tight with a single small strand of wire before soldering to improve results. it isnt because i usually like to know how to do things corre...
by want to build
Jul 21 2019 8:26pm
Forum: Battery Technology
Topic: how to seal the positive "Y" end of a diy batt
Replies: 16
Views: 657

Re: how to seal the positive "Y" end of a diy batt

when you say If done properly solder adds nothing positive., do you mean it does not make a more conductive connection? or do you mean that soldering does not solve the non water proof problem? what do you think about this solution , using hot glue to fill the space between the wires and adding 3 ri...
by want to build
Jul 21 2019 5:16pm
Forum: Battery Technology
Topic: best fireproof case/ system or DIY to store/charge lipo liion safest way
Replies: 42
Views: 1269

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

HI for ebike battery pack like 1000 wathours energy which is normal size battery for ebike I spend lots of time reacherching and it is unclear, lets help each other 1first option is ammunition metal case with seals out(to prevent pressure buiding up explosion) . THe videos i saw show this was lettin...
by want to build
Jul 21 2019 1:39pm
Forum: Battery Technology
Topic: amunition case fire case bags
Replies: 14
Views: 532

Re: amunition case fire case bags

yes i like your oxygene point of view.
i imagine you would drill the smallest hole possible for the charging case? right?

for storing, do you think those ammunition are air tight or there is a modification to do in order to make them air tight?
tx
by want to build
Jul 21 2019 1:32pm
Forum: Battery Technology
Topic: Building battery from MAKITA Konion PACK
Replies: 228
Views: 46853

Re: Building battery from MAKITA Konion PACK

Thank for your precious informative replies :)
by want to build
Jul 20 2019 5:52pm
Forum: Battery Technology
Topic: amunition case fire case bags
Replies: 14
Views: 532

amunition case fire case bags

HI i saw that some people use Usa ammunition case metal boxe to charge and store their battery. They say that if there is a fire, it will be contained. Im not sure about that. What do you think about that ? how many holes to you drill in those metal case? (need at least one for the charging cables. ...
by want to build
Jul 20 2019 5:20pm
Forum: Battery Technology
Topic: Building battery from MAKITA Konion PACK
Replies: 228
Views: 46853

Re: Building battery from MAKITA Konion PACK

hi yes it is true that i did bring back the volatge difference in a parrallel group back . the reason is that it is the usual 2 advice i read around the first is parallel than serie not the opposite and te second is the have similar voltage in the parallel group. I assumed those statements were the ...
by want to build
Jul 20 2019 5:07pm
Forum: Battery Technology
Topic: how to seal the positive "Y" end of a diy batt
Replies: 16
Views: 657

Re: how to y the positive end of a diy batt

HI i do not know if the job i do is good but i know that i can adda lot of tin and that it will be solid. the only thing with that Y formation is how to seal it properly. with heat shrink the long part (bottom) will be sealed ok i beleive buy i do admit that i do not know how to make it so that the ...
by want to build
Jul 20 2019 4:50pm
Forum: Battery Technology
Topic: Building battery from MAKITA Konion PACK
Replies: 228
Views: 46853

Re: Building battery from MAKITA Konion PACK

Tx john and matador for your help. i see you take care. when charged to 4,2 ( i beleive opus concretly only put 4,18 in them but that is a detail) and let sit for month as i said some came down to 4,15 some ot 4,10 1Correct me if im wrong but from what i understand it is ok to have 4,10 and 4,15 cel...
by want to build
Jul 18 2019 4:06pm
Forum: Battery Technology
Topic: how to seal the positive "Y" end of a diy batt
Replies: 16
Views: 657

Re: how to y the positive end of a diy batt

how about this wiring around if i add solder and a heat shrink? I searched your terms but omg there are so many kind of terminals! you mentionned ancor and ftz pacer , are those 2 name of brand? i could not find asymetric terminals . is what you are thinking about on this picture,s choices? how to k...
by want to build
Jul 17 2019 8:01pm
Forum: Battery Technology
Topic: Building battery from MAKITA Konion PACK
Replies: 228
Views: 46853

Re: Building battery from MAKITA Konion PACK

If they are small (low Ah) batteries ARE THE VTC4 I USE THE ONES DR BASS IS PRESENTING WHAT YOU CALL LOW AH? and you use decent wiring size to parallel them, that should be no problem and they will equalize. 2.1 AMPHOUR CAPACITY MY PARALELLE WIRE IS 30 AMPS CAPACITY 1 CM LARGE LEAF OF COPPER But th...
by want to build
Jul 17 2019 4:29pm
Forum: Battery Technology
Topic: Building battery from MAKITA Konion PACK
Replies: 228
Views: 46853

Re: Building battery from MAKITA Konion PACK

hi in an ideal world yes i would buy 5 times what i need but it would be king of long to open that many packs hahaha.

is 4.10 4.13 4.15 v to big of a difference to be put together in a same parallel groupe?
What is the consequence of having to big of a difference in full capacity voltage?
by want to build
Jul 17 2019 2:14pm
Forum: Battery Technology
Topic: Building battery from MAKITA Konion PACK
Replies: 228
Views: 46853

Re: Building battery from MAKITA Konion PACK

hi
i understand you suggest me to let them sit longer, they already have been for like 6 months for the majority of them.

do you know someone who could answer my question ?
by want to build
Jul 14 2019 5:11pm
Forum: Battery Technology
Topic: Building battery from MAKITA Konion PACK
Replies: 228
Views: 46853

Re: Building battery from MAKITA Konion PACK

hi i have charged and decharged all my cell and noted their discharge capacity. after couple weeks they show all from 4.10 4.11 4,12, 4.13, 4.14, 4.15 v I am in front of a decision here. I read that it is better to assemble cells of same voltage in a parallele group. ok . Also i read it is better to...