Bavarian RC - DIY LiPo Safe - Build Video
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- Опубліковано 6 жов 2024
- Build video of the Bavarian RC - DIY LiPo Safe.
Features: This DIY Lipo Safe is based on a standard hardware store metal box, protected on the inside with gypsum fibre board, including a vent duct for cooling and filtering of hot gases in case of a lipo fire. Replicated connections inside the box for charging and balancing of 2 batteries in parallel.
Link to the free plans and material list (All-In-One): drive.google.c...
Links to the free STL files:
All-In-One ZIP file: drive.google.c...
Charging Console: drive.google.c...
Balancer Console: drive.google.c...
Bracket: drive.google.c...
LiPo Safe Text Stencil: drive.google.c...
Warnings:
Always follow the safety instructions of your batteries and chargers!
Never leave your batteries unattended when charging!
Build and use this LiPo Safe at your own risk!
LiPo guides
rogershobbycen...
www.flitetest....
www.stefanslip...
Inspirations for my LiPo Safe
www.rotor-maga...
• DIY Lipo Safe Box
• DIY Lipo Charging Box ...
My tools:
3D Printer: Prusa i3 Mk3
Dremel 3000
Cameras:
Sony HDR-CX730
GoPro Hero 4 black
Light:
SAMTIAN 18 LED Light
Microphone:
Rode NT-USB
You have done an excellent job! You have also provided me with a solution to using an ammo box without removing the rubber seal. Your vent construction is very adaptable and should significantly reduce the smoke and flames in the event of a battery going off. Thank you so much for your incredible attention to detail & craftsmanship.
Thanks a lot for your great feedback. I am really happy that I could inspire you for your solution.
Hi, ich hab vor 2 Jahren deinen Lipo Safe nachgebaut, und hatte vor zwei Wochen einen Lipo Brand in diesem Koffer.
Hat seinen Zweck super erfüllt. Der Akku war ein 4s 1500mah Race Drohnen Akku, und er ist in meiner Garage hochgegangen. Es ist zum glück nichts Passiert, nur die Stecker sind geschmoltzen. Nochmal vielen dank für die Anleitung
Hey cool, das freut mich, dass der Koffer gut funktioniert hat und schlimmeres verhindern konnte. Das ist bisher die einzige Rückmeldung von einem LiPo Brand in diesem Kofferdesign. Hast Du auch die Lüftung mit Filter eingebaut? Wenn ja, würde mich interessieren ob der Filter den Rauch etwas dämpfen konnte und ob da drin irgendwas angekokelt bzw. geschmolzen ist. Wenn Du Fotos vom Koffer nach dem Brand hast würde ich mich sehr freuen wenn Du mir die schicken würdest. Meine Mail Adresse findest Du in den Kanal Infos unter Impressum. Nochmals vielen Dank für Deine Rückmeldung! Schönen Sonntagabend noch und einen guten Start in die Woche.
Nice work. Compare to solutions I have found on internet this is one of the best made.
Thanks. I have made 2 of them for my own use and they work great. Luckily they didn’t have to prove their ability to retain the fire in case a Lipo goes off. So far I had one feedback where the box had a real Lipo fire and it worked fine.
This is incredibly well made and every detail meticulously thought out. I also applaud you for sharing the files and this video and essentially making it "open source" for the community. I will definitely be sharing this and subscribing!
Thanks for your nice feedback. I am happy to share this with the community. I have 2 of these boxes in use since a while and they work really well. Luckily they never had to prove themselves in a real fire. But I already received one feedback from the community where box faced a real fire and worked well to contain the fire inside the box. Thanks for subscribing! There is plenty more stuff on my channel… hope you like it as well.
I'm looking into building my own fire resistant case, and I am noticing a troubling trend. I'm not sure if this has been mentioned already, but steel wool is incredibly flammable. The steel scrubbing pad may also be flammable since they, too, have a large surface area to oxygen-rich steel ratio. I recommend testing that if you haven't already, as It would be counterproductive to have a molten steel filter/more fire. Aside from that, this is an excellent looking fire resistant case, and I think it would work perfectly fine for containing fire.
Thanks for your feedback. I have seen how easily you can ignite steel wool. Nevertheless the one I am using is not as fine as the one you can ignite with a lighter. It is rather thick and I couldn‘t get it to burn with a lighter. Of course a LiPo fire is much more intense but I hope that the fire will not enter through the first fire wall into the chamber. To really know what will happen I would need to do a real test with a LiPo that I mistreat until it burns… maybe one day I will do that. I would also be curious to see how the 3d printed parts would look after the fire 😃
La tua costruzione è davvero bella. Ho ordinato il contenitore per poter replicare la tua build, grazie per il tuo prezioso contributo
Thanks, great that you liked it. I am using 2 of these Lipo safes since years now and I am still very happy with them. Enjoy the build! Ciao 🙌🏻
I feel so proud about german engineering. 👍
There‘s nothing a German engineer can‘t do 😂. Great that you liked it.
Awesome build. I worry about those dangerous batteries. I keeps mine stored in a lipo bag with each batt separated. I saw a video on you tube where a gent had a huge hobby shop in his garage, and he had all kinds of toys and chargers in it. He charged some lipo's and left for work. He came home and his garage was burnt to the ground.😕 I hope in the future the engeneers design a better and safer battery. Thanks for this informative video!
I try to be as careful as I can but as always in life there is some risk remaining. My golden rule is that I never leave house while batteries are charging. I think the battery safe can protect from fire but there is still a lot of smoke involved in a lipo fire. Hope I‘ll never have to test the box.
Most lipo bags will not contain the fire if they go
@bavarian_rc maybe it would be quite interesting to test it in a controlled environment just to see how good it is ;) but I understand how long does it take to build this thing and that you don't want to damage it
Yes. I actually thought about a real test but it would be too much work involved in the build to just burn it 😜 But I already received a comment where my Lipo Safe had to deal with a real Lipo fire and did a good job. Comment was from Sebastian (in German)
Never charge batteries and leave them sitting around. Always storage charge them when unattended.
Stick on magnets to the leads, so the cable won't dangle when in transit. You can then stick to cables to the lid and they won't be a nuisance. Or you could make corresponding ports on both sides, so you'd connect the leads to the box when actually charging. Great job
Great idea! Never thought about it as I only use it at home but for transit a very clean way of keeping the cables under control 👍
Making banana sockets on the outside as well makes the box more easy to store. Just pull out the charging cables and put them inside.
Super gemacht , Danke für die Anregung
Danke ☺️ Hab 2 von den Boxen seit einigen Jahren im Einsatz und bin sehr zufrieden. Zum Glück musste noch keine Box im Ernstfall beweisen was sie kann.
This is a very nice build, and looks very professional. The problem I see with this build, is that it's a one time use kind of thing, unless you don't mind replacing all the exposed components that will get burnt up. Of course most products designed to contain lipos fire are one time use, but I just find that with the amount of time, money and parts put into this build, it's not practical. At least not for me. And lets not forget about the required tools.
A similar but more practical build could be something as simple as a metal lunch box insulated with gypsum board and gypsum board dividers. The dividers could separate 2-4 lipo batteries, and then your choice of whatever extension wire needed to charge your lipo. And in the event of a fire, your other batteries should survive and you'll only have to replace one battery and the extension wire.
In a previous video I watched, I wondered if it was necessary to vent the metal box to allow the smoke / hot gasses to escape it. But I think unless you're using a considerable amount of filtration, the smoke / gases will find its way out of the box anyways.
I can really understand your argumentation and for sure you have to question if it is worth the effort as a „one time use item“. Well for me I have to say that it is not a one time use item. I am using the box hundreds of times... and hopefully will never have to use the fire protection feature that it provides. In case a lipo fire will happen it is for me worth the 50 Euro I put into it... and yes the cables and batteries are lost. Compared to the potential damage to my home that is quite negligible. But there is really no right or wrong, so your approach is fully valid. Speaking about the ventilation there are two aspects, first to cool down the hot gases and second to filter as much as possible the smoke. For the cooling I am quite confident, the filtering of the smoke could be more tricky for my box, but better than nothing, in any case you need to provide an option for the gases to exit the box... otherwise it will be a kind of bomb. Finally whatever the design principle the most important thing is that it has to prevent fire. Let‘s hope we‘ll never have to put it to the test
@@bavarian_rc Your video inspired me to build my own. I literally just built this today after seeing your video. It's unfinished, but I will be drilling some holes, adding some grommets and running some JST-XH extension wires through the case, so that in the event of a fire, the charger won't be damaged and hopefully the adjacent batteries. All that will need to be changed is the grommets and extension wires. drive.google.com/file/d/1H0ggloh5nrkEp-GauAq5A6j6PYT2beul/view?fbclid=IwAR07GM1pGdW0hHTbqpQhkAlosp6v7P_HLzdB-PcikCx_pm13R-TVXdD8GoA
Looks great! I‘m really glad that my design was giving the inspiration to do your own version fitting to your needs. That‘s what I like in sharing our builds and designs... the ideas are developed further and anyone can adapt them. 👍
@@ubreakitirepairit3569 Link doesn't work. Would like to see your version.
@@streaydog019 I think I deleted the photos. I’ll put up a video shortly.
Handwerklich saubere Arbeit! Aber ich habe so meine Zweifel, ob im Ernstfall die Thermoplaste aus dem 3D-Druck hinten nicht dafür sorgen, dass da relativ schnell heisse Luft durchkommt und der Gummi aussen zu brennen anfängt und auch im Zweifel durch diese Öffnungen Funken sprühen. Natürlich nicht bei nem kleinen Handy-Akku, aber bei größeren Brocken und mehreren Zellen, die dann auch zeitversetzt durchgehen... Würde da min. zu feuerfester Dichtmasse raten, gibt es ähnlich wie Sanitär-Silikon und wird üblicherweise dazu benutzt, Kabeldurchführungen etc. feuerfest zu machen. Besser noch verschraubte Stahlblechkonsole innen und isolierte Buchsen. Möglicherweise kann diese Dichtmasse dann auch gleich als Kleber für die Fermazellplatten und oben als Dichtmasse dienen, bleibt dauerhaft elastisch, wenn auch härter als Silikon... Zudem noch einen Temperaturfühler je Akku, der das Laden abbrechen kann, dann ist es schon fast richtig sicher. Wenn dann die Unterlage auch noch feuerfest ist und rundum ca. 1 m nichts Brennbares rumsteht passt das. Abgetrennter Heizungsraum mit Feuerschutztüre wäre der wohl geeigneteste Raum dafür im Haus, aber nicht bei Gasheizungen natürlich... Lack aussen (wie innen) würde ich auch weglassen oder wenigstens Auspuff- oder Ofenrohr-Lack nutzen, der maximal wärmefest ist. Muss ja nicht mehr Schadstoffe dann freisetzen als notwendig...
Ja, da kann ich dir durchaus recht geben. Die 3D Teile werden sicher wegschmelzen. Die Frage ist nur ob sie lange genug halten bis der Brand ausgegangen ist. Da ich nur kleinere Kaliber an Lipos habe mache ich mir da nicht ganz so große Sorgen. Zumal ich einen Beutel Fireballs in die Kiste mit rein auf die Lipos lege. Die würden das Feuer im Ernstfall auch schnell ersticken. Aber wie gesagt deine Ideen sind absolut sinnvoll und nachvollziehbar ... wenn ich mal eine Version 2 mache dann werde ich darauf zurückkommen. Nochmals danke für die Tips!
Very very interesting and informative. Thank you xx
Thanks! Great that you liked it
Really good work !
Thanks a lot 😊
I use the box with 4 small plastic bottles of water to reduce the temperature of the fire.
The box is only closed at one side and of course only used outdoor.
Interesting approach 👍🏻
That's not a good idea as the water will only intensify the fire. watch a few videos on UA-cam and you will see what i mean. a cheap way is to fill little plastic bags with sand and put on top of the batteries when charging. if there is a fire, it will melt the bag and put out the fire
Toller Eigenbau 👍
Danke 😃 ich hoffe das Teil muss nie beweisen dass es funktioniert
Egal es kann immer etwas passieren und wenn nicht ist es Super 👍
I would buy one of these
Thanks! I fear the price would be quite high taking into account the time I needed to build it 😂
Very nice design! Going to make my own. By the way, I have 4 boxes to do because I will use 3 off them for storage only. I do have an idea to make it even safer. I believe that once the lipo is burning or reaching high degrees it will be in no time that the 3d printed parts are melted! You will have immediately 2 gaping holes! I would even them protect with fire board to gain time in melting the 3d parts. Is this a wrong thinking??
Great that you liked it and that I could inspire you to build one... ehm 4 😉 Concerning the melting of the 3D printed parts your thoughts are absolutely relevant. I had similar thoughts but still think that there is no real issue. 1. lipo fires are very rapid. so I hope that the fire is already over before the 3D printed parts are gone. 2. even if they melt away the remaining hole is not so big as there is still the grommet and the cables.
Nevertheless if you want to go extra safe you could add some more protection to that area. Have fun building!
I have the same concern. (Thanks for your inspiration btw, im building my version as we speak). My concern is not the holes when the 3d parts melt, but the contained contacts getting loose and touching each other and thereby creating a short. Any thoughts? When the shorts triggers the current braker and thereby stops the charger, this negative feedback might even be a good thing. I will try to think off something nice as a solution. Maybe we can use the low melting temperature off PLA to release a fire extinguish fluid of some sort.
Good thoughts 👍🏻
Looks ace I’m going to adapt my ammo box to use those 3D printed connectors
Happy to see that my design is useful for you 👍🏻
Very nice work of you!
Thanks a lot 😊
Super Anleitung, danke! In welchem shop habt ihr die Metallbox gefunden?
Danke ☺️ Die Box ist von Bauhaus. In der Video Beschreibung ist ein Link auf meine Material Liste, da sind auch die genauen Angaben zur Box drin
I would recommend a carbon filter and primer before you paint.
Carbon filter could be a good upgrade! ... for the painting I was lazy 😜
Love the design. Very elegant. I wonder if I could have that box shipped to US. Having difficulty finding a box similar to the one you used.
I just checked the online shop of that hardware store...unfortunately no shipping outside of Germany. If you manage to find something comparable in the US then let me know so I can add the info to the description. Good luck!
@@bavarian_rc Will do. Thanks
@@bavarian_rc this looks good batteryhookup.com/products/military-ammo-can-fireproof-enclosure
Yes that will do the job! Thanks for posting 👍 I would only suggest to remove the sealing (if it is still installed) or add a vent like in my build to ensure that the gases can escape.
It is difficult to get the drywall to fit tight without any of it coming apart (crushing). I tried it and the ammo can's corners require you to round the edges for the bottom piece to fit, but the pieces for the width don't want to fit tight all the way because the ammo can isn't square enough for that. I used a sealant for grills and cookers on mine. Making the individual compartments is almost impossible unless you use a table saw of some kind to get things square enough to begin with, otherwise you get gaps.
If you box is not very square then fitting the drywall pieces can become quite painful. Luckily the boxes I use are quite ok. I might as well need to look for a different sealant as mine has dissipated a bit over time. I hope you will master the challenges of getting things to fit. Never give up!
Thanks for sharing this build, this has been very interesting and helpful.
I have 2 big bat-safe boxes but I mainly use them as safe storage for holidays when the batteries been put on storage voltage and put them on concrete without anything flammable around.
I was looking to make myself smaller boxes for charging, something better than just ammo boxes and this totally overkilling it design of yours is right where I parked my car.
May I know what glue you used ?
Wunderbares Projekt, sehr gut durchdacht und durchgeführt, Vielen Dank!
Great that you like my design. I have 2 of these boxes in use for my charging station consisting of 4 chargers. The glue I used is Fermacell PU glue. If you can‘t find this one you could also use Gorilla PU Glue which should be quite similar. Enjoy the build!
@@bavarian_rc Danke sehr!
Gerne 😊
Das sieht sehr gut aus.
Was ich allerdings stark anzweifle ist die Funktion des Filters.
Lipo Brände sind sehr heiß und gasen extrem.
Da wird sich die Stahlwolle sofort entzünden und die "nicht brennbare" Filtermatte hinwegschmelzen.
Hi Peter. Ich muss zugeben, das war auch mein erstes Gefühl, aber nachdem ich das Video (ua-cam.com/video/-5yVQeviFYI/v-deo.html) angeschaut habe (bei 1:43), bin ich nun überzeugt, dass die Topfkratzer nicht brennen. Das ist übrigens nicht so dünne Stahlwolle, die man mit dem Feuerzeug anzünden kann, sondern recht dick. Der Filter wird sicher etwas anschmurgeln, aber das sollte kein Problem sein. Ich hoffe trotzdem, dass ich das nie unfreiwillig ausprobiere. Wenn ich mal Zeit habe werde ich eine Testbox bauen und einen Lipo drinnen zünden.
Ist der Kleber überhaupt hitzebeständig? Nicht, dass die obere Platte dann einfach abfällt wenn es da drin mal heiß wird. Aber um einen Brand bei einer Lipo Entgasung mache ich mir weniger sorgen. Das bekommt man ja recht einfach in den Griff. Deine Kiste ist dafür schon ganz gut geeignet um die Flammen drin zu behalten. Ich mache mir aber eher Sorgen um die enstehenden Gase die dann aus der Kiste kommen. Bin schon die ganze Zeit am Überlegen wie man das in den Griff bekommen könnte. Dieser BAT-Safe hat zwar einen Filter aber ich denke nicht, dass der was bringt. Da muss ein Eigenbau her. Scheu dir mal die Bundeswehr Gasmaskenfilter an. Vielleicht kann man 4-6 davon an so einer Kiste anbringen. Nur mal so als Idee. Keine Ahnung ob die Filter das auch nur ansatzweise filtern können und der enstehenden Hitze überhaupt gewachsen sind. Vielleicht gibt es auch andere fertige Filter die man verwenden kann. Deine Meinung zu dem Thema würde mich echt interessieren.
Ich glaube nicht dass der Kleber Hitze beständig ist. Aber bis die Hitze dort ankommt muss sie ja erst mal durch die Platte kommen... das sollte die Platte eine Zeit lang verhindern. Das Thema mit den Gasen bekomme ich mit meinem Filter sicher nicht in den Griff. Mir ging’s nur drum so viel wie möglich von dem Dreck drin zu behalten und in erster Linie einen Brand zu verhindern. Solltest du bei deiner Filter Recherche auf eine gute Lösung kommen würde mich das sehr interessieren. Ich selbst habe mich bezüglich Filter noch nicht großartig informiert.
Schau mal nach aktivkohlegranulat. Das ist auch in der Bundeswehr und Chemiefilter drin. Nach ein feuer kann mann das granulat einfach einwechseln für neues. Einfach die ganze kammer füllen damit.
Danke für den Tipp. 👍🏻 werde ich mir besorgen
Have you tried it so you know how much mah and cells it can keep you safe from if they started burning?
I have never made a test but I know from one of my viewers that the box prevented a fire for a smaller LiPo. Something around 3s and below 2000mAh if I remember correctly.
thanks for your work! really helpful, wanna make it soon. Did you think about selling it?
Great that you like it! I think selling is not an option as the production cost would be too high due to the high manual effort.
Hallo Bavarian RC
ich würde gerne die Box nachbauen, nur Leider kann ich die STL nirgends finden,
kannst du mir die senden?
Ich benutze Cura.
Gruß aus Bnn
Servus, in der Videobeschreibung findest Du die Links zu den STL Files. Falls das nicht geht, hier nochmal der Link zur ZIP Datei mit allen STL: drive.google.com/file/d/1vem0kRdKDgeBx4YF_SqgY6HUIo1FeVOc/view?usp=sharing
What you need is a Zahnspachtel 😎
😂😂😂 ... I have to admit that I have one... but wanted to avoid the cleaning 😜
Bavarian RC Haha, good point! But this stays in contrast to the huge effort, you obviously spent for this video! Incredible!
Sick! Would you make and sell me one?
Happy that you like it. Unfortunately I can't build one for you. The effort (and cost) would be too high. Not sure about the exact time I needed to build one, but 15-20 hours seems realistic. So this is really for people who want to build themselves. There is the batsafe on the market which is similar and is around 80 EUR.
Very nice project! I think you could have also used some kind of fire proof putty/cement to fill the holes with wires. That would avoid printing any parts because you could have just wires going through with connectors on both ends. I also think that the metal mesh is not going to cool the exhaust gases any meaningful amount because the mass of that metal is not enough to delay the raise of the temperature. However, if will distribute the pressure evenly which should prevent outflaming. I guess you could get equally good results with 3-4 walls with holes, too, and that design wouldn't collapse in fire even if the fire gets really hot.
And I would recommend using fire proof cement instead of glue to hold pieces together.
All hot glue and 3d printed plastic pieces will practically fly away in case of 6S battery fire so those have no value for the safety. Here's a video of one (1) LiPo 6S getting fire during charing in a sack: ua-cam.com/video/CnNId0mDnBo/v-deo.html - it's obvious that plastic or hot glue have zero value.
Thanks for sharing your ideas. You mention the two points where I am not absolutely sure how they will perform in case of fire. To reduce the risk I now put as well a bag of fire balls on top of the lipos during charging. According to the manufacturer they will encapsulate the lipo and prevent the fire from spreading. Anyway I hope I will never have a real life test 😜
@@bavarian_rc LiPo batteries are pretty dangerous indeed! Here's one interesting test with different charging bags: ua-cam.com/video/atkgUwGHL_k/v-deo.html
The performance of those bags seem to be all over the place and price doesn't correlate with quality.
Yes you are right about those bags but I didn't mean the lipo charging bags you are referring to. I meant those fire extinguishing balls: extron.pichler.de/FIREBALLS-Fire-Extinguishing-Pearls-for-Lithium-batteries-5-Liter
Hallo. Ich habe vor mir solche Kisten zur Lagerung zu bauen. Wie viele Akkus willst du maximal in so einer Kiste lagern?
Ich lagere meine Akkus in nem Lipo Bag den ich dann in die Blechkiste lege. Durch den Lipo Bag spare ich mir das Auskleiden der Kisten. Hab rund 5-6 Akkus pro Kiste (3S-4S)
I took 81mm ammo box for my ebike
Ammo boxes are a good choice. Not sure they are easy to get everywhere. For sure they look cool and do their job 👍🏻
Where are you buying lipos or chargers from to be so scared of charging it? Do you charge your phone, tablet, laptop,… in a box to?
Hi and thanks for your comment. Please don‘t mix lithium batteries used in phones or laptops with the LiPo batteries used for RC models. LiPo‘s are a totally different breed. 1. The chemistry inside is different. I am not an expert but there are plenty of sources on the internet where you can read about it 2. Most of the LiPo‘s we use in RC consist of multiple cells in series. During charging you need to properly balance the voltage of the cells. Anything in excess of 0,1V of difference will lead to damages to the LiPo… or if the delta is bigger it will lead to a stronger current flowing between the cells, which in the end will most certainly lead to a LiPo fire. That‘s not what you want! Therefore any LiPo should be in a protective case or LiPo bag during charging and storage.
I don‘t know if you are using LiPo‘s and how you are treating them but if yes then I strongly recommend you read some of the basics about LiPo‘s, for your own safety!
@@bavarian_rc I use Lipos for over 20 years and you are wrong, sorry
Ok, no problem with that. I wish you good luck!
@@bavarian_rc just do t overcharge any cell, don’t short and do t puncture and you are good.
Never had a Lipo fire, and some times a cell can die, or go well under 3v, no problem, if you have the ability you can exchange the cell or remove it changing the number of cells and can still use it no problem, I do that a lot here for friends
For sure you are right, if you don‘t mistreat your battery everything will be ok. But what if your charger gets faulty? Would you trust your life on your charger? I have quite good Graupner chargers and only use high quality LiPo’s. Nevertheless I simply follow the rule „better safe than sorry“. It is my way of doing things… 😃
well done cheers
Thanks 😊