Fixing Broken Bosch 36V Li-ion Battery Pack - 776
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- เผยแพร่เมื่อ 20 พ.ย. 2018
- Fixing a Bosch 36V Li-ion Battery Pack, that a colleague of mine, use in his Bosch lawn mower. I enjoy fixing stuff!
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/ myplayhouse
Even just 1$ a month, comes out to the same as Binge-watching like 400+ of me Videos every month.
My PlayHouse is a channel where i will show, what i am working on. I have this house, it is 168 Square Meters / 1808.3ft² and it is full, of half-finished projects.
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You're right about the lack of balancing function on this battery. This is very odd because when some cells will get out of balance, this will overcharge some of them. Very dangerous as far as lithium is concerned... I have no clue why a "reputable" manufacturer such as Bosch does that, a fire incident could damage their reputation
Hi speedsterh
Thank You very much! glad you liked the video :-)
Thank you for watching! :-)
If you use a little more time on sourcing and testing cells, securing conformity between cells, then you dont need a BMS. Check up Garcias videos, he says the same with big packs. He ran a bus on a battery pack without BMS. Also they put a termo sensor cutting out if the batteries should overheat
Hi Morten, noticed another comment saying that not many tool batteries have balancers..... Have personally taken apart hundreds and found that in the last 2 years more and more are coming out with no balancers. I have an almost identical bosch 36v with balance, but it's a couple of years old. The cynic in me says this is all to do with manufacturers trying to increase profits. After all there is no way the battery without balance can last as long as the one with.
Great videos.
Hi benjamin hayes
Thank You very much! Totally possible,, or to give the manufacturer's a little credit, Maybe it's not as necessary anymore, maybe there is more errors on the balances cricket then on the batteries,, maybe the cells then self includes some safety kill switch.
Thank you for watching! :-)
I love watching folks who do this - Good Work, Morten ! I have a similar battery, but mine is working well - has done since I bought it back in summer '17 - lucky me :-)
I like fixing stuff :-) You are welcome..
I've always said that scrapping and saving from dumpster soon or later help you fixing and keeping other devices away from the dumpster... 😁
Hi Stefano Bettega
Thank You very much! glad you liked the video :-)
Thank you for watching! :-)
It's a hell of a good feeling to fix stuff!
Hi Runehorn
Thank You very much! glad you liked the video :-)
Thank you for watching! :-)
Good to see repairs and continue to be used. Unlike the people that just through it out when it stops working and buy a replacement.
Hi Peter195267
Thank You very much! I do like fixing stuff :-)
Thank you for watching! :-)
@@MyPlayHouse So do I. I have several projects on the go, all in different stages of repair.
Yes, I’ve opened up an 18v battery and again no balancer, serious omission as this is a serious safety issue. Great to see I’m not the only one to notice this.
Well it was more to save an expensive battery :-)
Thanx! I've 3 batteries of that type and two of them have allready the same problem. Now i have a point where to start to fix them!
Hi b apro
Thank You very much! hope it will work out for you :-)
Thank you for watching! :-)
Man, I haven't seen someone use electronic skills in a very VERY LOONGG TIMMEE other than myself. Good job, from former ISCET.
Well thank you,, it's not often I get to do it,, but it happens. :-)
Great video very Helpful good to know a faulty button can stop the whole thing from working
Hi Justin Martin
Thank You very much! glad you liked the video :-)
Thank you for watching! :-)
Yeah I never expected that. Why does this happen,what does this "indication" button have to do with the battery being able to provide power to the tool? I have a bosch tool with same issue,battery charged 40v and button not working,now I know what's wrong but I still dont get it
What is the middle pin for? Is it for the temperature sensor?
I made a custom battery for my "easy rotak 36-550" machine and i connected only the + and - from the battery, no middle pin.
The machine it starts for 3 seconds, that stop.
Sorry I do not know,, do not have this battery,, as I returned it :-/
Awesome fix :D
Hi ANTHONY CABALLERO
Thank You very much! glad you liked the video :-)
Thank you for watching! :-)
Mine (36V 6Ah) wouldnt charge because it was completely flat and the charger thought it was faulty. I had another battery for my strimmer (36V, 2AH) and "jump started" the flat one from the charged one for a few seconds (+ to +, - to -) and that was enough for the charger to realise it wasnt faulty and battery is as good as new now.
Good fix!! happy to hear a success story, and a battery that was saved! Thank You!
I bought an electric desoldering gun a few years ago for 80 euros. It's so good, I can remove everything off pcb in 5-10 minutes :D
Hi SinsBird
Thank You very much! glad you liked the video :-)
Thank you for watching! :-)
I have a Bosch 36v garden battery that’s measuring 30.4v but the charger thinks it’s bad. Is that too low a voltage for it to charge?
The charger can probably see, that some of the cells are way out of balances,, take it a part and check it with a volt meter. and charge up the low cell(s) (never charge li-ion with more than 4.2 volt)
@@MyPlayHouse thanks. Is there a way to charge it without pulling it fully apart? I tried linking a fully charge battery and that didn’t do anything. What does the spring in the middle do?
i notice when you try to remove the plus cable from ther battery you damage the protection of this? is danger have a little part of red wire exposed?
Hi Christian Belotti
Thank You very much! Yes the insulation melted... it's fine.
Thank you for watching! :-)
Another Oscar for this one.
Hi António Manuel Fidalgo
Two Oscars,, now the film industry is ready to have me killed!! :-)
Thank you for watching! :-)
No balancing on most tool batteries, unfortunately. I've taken apart Bosch, Makita, Dewalt and Milwaukee and found nothing in most of them. The newest versions of Makita seems to have it, though.
Hi Jesper Monsted
Thank You very much! I forgot to check when I had the Ryobi battery apart.
Thank you for watching! :-)
Makes you keep buying their crap. Use adapters and avoid buying from them in the future
Check the battery PCB in more detail and you will see a fuse you can take out to give you safe isolation from the risk of a full battery short circuit.
Thank you very much!
That fuse is connected same way. Not soldered, but spotwelded
Good Job. Was Worried when you removed the switch without being able to disconnect the power. To help protect you, I unplugged my computer just in case....So, how did the battery project work out? ⚡🤣😋😀😀
Hi reedrancho
Thank You very much! With your help it all worked :-)
Thank you for watching! :-)
Great video.
Do you know if the battery ended up working well in your colleague's lawnmower?
He said it did,, and I got cake! :-)
@@MyPlayHouse I think I've damaged my battery more by tinkering with it. Like, ruined to the point that no amount of cake could fix it.
Hi I am getting a rapid blinking green light when pressing the battery status button, and the battery goes red on the charger when it is slid into the charger itself. What can be wrong? Thanks.
I fixed this battery for someone else,, so I do not have it anymore..
But I would take it apart, measure the overall voltages,, if that is okay, I would mesure the voltages on each cell,, to see if anything it to low. Best if they are all with in 0,1 volt of each other.
If one or more is to low,, you need to charge that up a little,, if to high,, draine it a little,, using a little load,, 6volt motor, or 6volt light bulb.
@@MyPlayHouse This would obviously require volt meters and other electronic tools to be able to charge and test as you say. I am sending this 32V 6Ah battery to Robert Bosch here in the UK in few days time, and I hope they do as you say and get it to take a charge again. The battery is just 28 months old, and I did not over charge or drain it for it get like this. It all went wrong when I mowed my lawn and the mower kept losing and regaining power until the battery completely died yesterday. I mow my lawn at least 20 times over a 30 week period of time .
Yes the battery should still be good after 40-60 uses.. :-/
@MyPlayHouse I received a new 36V 6Ah lithium ion battery 5 days ago and mowed my lawm without any charging issues prior to the mow. However, the battery only has a 6-month limited warranty. We'll see how it goes.
Best of luck!
I dont understand, that switch is only for the led lights right? Or is the current also passed through it?
Sorry I do not remember,, old video. :-/
From what I've seen when examining my own battery, the tool (drill/mower/etc) uses the centre battery connector as a parasitic 1wire interface and queries the battery for info such as pack voltage (18/36v) and temperature. If the battery doesn't respond, the tool will refuse to power up, or will work for 1 second and then die. It's a combination of safety protocols and presumably DRM in a failed attempt to thwart aftermarket clones.
I'm guessing that the BMS had previously registered some sort of fault and entered a lockdown mode for safety. Some sites report that holding the status button down for ten seconds will perform a factory reset on a Bosch BMS, so perhaps that inadvertently happened whilst the switch was being replaced (I got the impression the bit of the video that was cut out at 9:10 involved an epic desoldering struggle which likely bridged the switch contacts).
At some point I'm planning to hook up a logic analyser and decoder to see what's going on. I was surprised to find practically no info about it online. Bosch do provide industrial BMS systems, so perhaps there will be datasheets available for those that reveal some of their consumer device secrets 😁
Anyhow, it was a very useful and informative video, even if the root cause wasn't identified. Nice one Morten 👍👍
god video - ved du hvordan man lader en 36 v B&D batteri som man ikke har laderen til?
I am very happy with this one : th-cam.com/video/3P014_gAJUk/w-d-xo.html
Great video bud, just a quick thought....do they make an adapter to fit 2 making batteries to this ( makita does it already)
I do not know if Bosch does this,, or someone else does it for them :-)
I have seen a lot of batterys of powertool and bosch has no balancing. I have seen so a lot of broken one because they just get debalanced. Their are certain batteries which tend to do it more than others. The older bosch 18v batteries especially the 4 and 6 ah ones use Samsung cells which are more of a problem than the 5ah once which habe LG cells. They even state that they match the batteries so there is no need for balancing. If I'm honest they could get longer life out of the cells if they would balance them but I guess it is just like a oilchange on a car. That's were they make the most of the money. On the same time you get makita batteries and they are balancing the battery pack but put a kill switch on there which counts the cycles and then kills the bms. You'll find a lot of videos on that topic. You can actually rather not balance them and balance them manually like I did with my battery packs and just do it once in a while and you get plenty more life out of them. At least that is what I do with bosch batteries 😊
Hi TechnicDude
Thank You very much! glad you liked the video :-)
Thank you for watching! :-)
I put my 36v battery into charger. It indicates both green and red blinking one after another. Any idea?
Does the charger not say what that means ?
Wow very good I subscribed your channel
Hi Thanos Evangelopoulos
Thank You very much! glad you liked the video :-)
Thank you for watching! :-)
Yes i also wondered where the wires for the cell balancing were, also where is the temperature sensor for safe charging?.
Your solder sucker needs a clean and relube, they are a bloody nuisance :-(
Saving some parts is handy :-D
Hi zx8401ztv
Thank You very much! It feels so good to use some of the parts, that I saved long ago. :-)
Thank you for watching! :-)
Hey Morten godt at se du stadigvæk laver videos 😊👍
Hi AlumiTube
Thank You very much! Jeg har godt fulgt lidt med i hvordan du har ramt en guldåre,, meget imponeret! Jeg har laver tre videoer om ugen igennem de sidste 3½ år,, det er ved at være for meget, så til næste år går jeg ned på 2 videoer,, alt den fritid jeg får :-)
Thank you for watching! :-)
@@MyPlayHouse My crash course of Swedish kinda helped with reading this, lol
Hej Morten, fed video - godt med noget nørderi :-)! Jeg vil høre om du kunne hjælpe mig, jeg har en Black+Decker 36V oplader der ikke virker. Det er helt sikkert noget simpelt, men jeg kan ikke få printkortet ud, da der er et par special skruer der holder det på plads. Mvh Chris
HI Rns E
My channel is English, and to make sure as many as possible, can also enjoy the comments, they are also English.
Please keep to English.
Thank you for watching! :-)
@@MyPlayHouse Sure, no problem. Do you have any idea what may have coursed my Black&Decker 36V charger to stop working? It's completely 'dead' no light flashing and batteries not charging. I've tried to open it and look for a fuse, but there does not seam to be a fuse.
Hvorfor tre kontaktpunkter fra batteriet?
Probably for future use.
Didn't you film anything yesterday at Arrow? :D
Was hoping to get a mentioning for opening the door for you :p
Hi Off-grid Denmark
Thank You very much! for opening the door for me at Arrow ECS,, Yes I did do a video,, on an ThinkSystem SD530 and D2 Enclosure. Videos are delayed,, by a week-ish :-)
Thank you for watching! :-)
Replacement Power Tool Battery for Bosch D-70771
Battery Type: Li-ion
Voltage: 36V
Capacity: 4000mAh
Color: Black
Weight: 1270.95g
Dimensions: 97.92x72.77x156.99mm
www.drillbattery.com.au/buybattery.php/bosch_D-70771_power+tool+battery.html
Hi BatteryDepot comau
Why are the 4AH pack lighter then the 3AH. Quality 18650 weigh more.
Thank you for watching! :-)
THEY SPOT WELDED THAT ON!! JUST SAYING OLD ONE LEGGED JOSEPH T RETIRED NAVY
Hi Joseph Brendel
Thank You very much! glad you liked the video :-)
Thank you for watching! :-)
He is right. They spot weld the cables to the busbar. If you want to take it of use some cable cutters and lever them of. Just do it on the negative side, way less risk of short circuit when soldering back on the busbar.
Can i charge 18v battery on 3640cv charger?thanks
Hi Girts Zeltins
I do not know :-/
Thank you for watching! :-)
Might have been in use on a Bosch lawn mower but that does not look like a Bosch battery.
I am sure they have someone else making them for them.
My PlayHouse I think those are knockoffs - not made for Bosch at all. Genuine Bosch batteries will say “Bosch” on the side, and those just look like phony copies.
hi sir .. i think the balance it's propably inside the tool
Yes, you are right :-) you probably are...
Nice fix!
So.. When are you gonna ask Maja on a date?
Hi DrumdevilNL
Maja loves Copenhagen, and I have an awesome job in Aarhus,, there are 350 KM between those two :-/
Thank you for watching! :-)
I have a tool but no battery.
I did not keep this one.. Maybe look for a 3.th party one :-)
First:)
First to reply :)
First to reply the "first reply" ??
@@matiasm.3124
First to print here: auwemv sjemfnmun!
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Are you Danish?
Yes,, it’s all over the about tab 🤗
@@MyPlayHouse Alrighty then, I guess I should have read that!
Please.. Please.. Switch your Background Sound Theme!! PLEASE!
Why should he change it just to please you.
Niet!
Nah, I like it
Well,, TH-cam has a library of music that I can use for free and without getting in to any problems. I have been in there from time to time,, never found a good replacement.
@@MyPlayHouseyou don't need music at alllllll