18650 - Part 17 - Opening Bosch Powerpack Performance Frame 

Very interesting video! I'm right in the middle trying to find out why the Bosch Power pack 400 of my wife's Cube Elly suddenly died this morning. I have come to the point where I could open the top of the pack with a nylon tool that's used for removing the dash and door panels. However I have stopped my action out of fear of breaking the plastic fasteners. I will proceed later today and use an Allen wrench and some muscle power just like you did. Question... How are you going to fix the connecting strip back to the cells? Soldering them might cause an issue because the cells don't like heat. Besides the battery pack I also suspect the original Bosch charger to have some issues because on the plus and minus leads I cannot read a voltage. Will the charger be switched on only with the battery pack connected? If that's the case it's understandable why I don't get to see a voltage... As far I know there is no (replaceable) fuse inside the charger that can be faulty.

Always remove strips on the negative side first then you can bend the positives outwards like a starpoint and easily cut them apart without risk of shorting. Every spark means you damaged the isolating plastic layer , which is never a good thing.

Excellent tutorial thanks. Is there a way to check the bms without opening the case? It charges but doesn’t run..

Hi There I was watching ur video, by the way very good. I have two Bosch 36 volt batteries that need BMS boards. There not charging. Do U have a couple I can buy from U? or do know where I can buy a couple boards? thanks for ur help. chris

Question - can I simply pull the tabs off and lay a bit of solder over the little sharp bits that are still on there from the spot welding so I can get good contact? I am not an electronics person but I do have a couple of battery packs with 18650 batteries in them that I'd like to salvage...

Any chance you can point me in the direction to get a new mother board.

Hi this is Stefano. I have a Bosh Powerpack 300 that it's not working, I think it's not the batteries but the electronic board. How can I reach to you? Can you repair for me if I send this battery to you? Thanks!

Bonjour peux tu me dire svp quoi faire avec cette vélo qui indique un ''Err1/4 dans l'écran. la solution de ce problème svp

When you short circuit one or two battery cells, can you still salvage the other battery cells? Or are they all dead now because they were all connected?

There is much easyer way without damaging the case

Wjere can i buy a bms for that Battery pack

Hi there. Thanks for the content. You say bike shops send you many batteries. It would be great if you would repair them and then on-sell them. These batteries are still horrendously expensive in Australia; over Au$1,100 for a 500! This makes having a spare or one extra for long day trips almost out of reach for many. Please offer these batteries for re-use. ☺

hello, when I charge my battery 3 LEDs flash at the same time as if the battery is too hot or too cold when the temperature is normal do you know where it could come from? when I press the button to check its capacity it displays the 4 leds and turns off

congratulations. Unfortunately I don't understand your language, I'm Italian, and I only watch videos. I try to ask you a question, based on your experience, is there a way to get the power out of that 500w Bosch battery pack, without connecting the cable to the bike? I managed by feeding the pin that uses the charger with 5 volts, but do you think I can use it in that way? thank you very much ... ps for the translation I used the online translator

Hello what is the best battery (cell) model these days for the price please ? You mentionned the Samsung inr18650 35e but it was 2 years ago. Thank you for your help and happy new year !

i have a 36 V Bosch 400 Powerpack!! the BMS is down(Flatkable) and 4.Cells are with low Voltage!! The other Cells are fine (3.8 V) . Can i use this Pack to build a 7.S 24 Volt with New BMS. Regards Johannes from Germany.

Hi i have a bosch battery it charges 75 per cent when i try it on The bike it work for somme minutes than it switches off. I opened it The battery packis 36 volts it is something wrong with The mother board slo you sell The boards

Hi there, it's a great video! I have one of those 500 with a warranty off. It's charged correctly and I still use it. But is only one thing - after mounting it on sometimes the power goes off and sometimes back on again. Looks to me that something is bad with mounting contacts or inside. I use an electronic cleaner it might need to use something else instead. Thx if you give some hint for that approach.

Great Video! Does anyone know where to get another BMS board like this one? Does it have any number etc? Thanks

Please be careful with deep discharged cells, I have read some veery interesting stuff about them . Here some I found :If the voltage on a Lithium-ion cell drops below 2V, bad things start happening. At the cathode, the oxygen in a Lithium Cobalt Oxide or Lithium Manganese Oxide cathode can break down over the course of a week or two. For a Lithium Iron Phosphate cell, the oxygen breakdown is even faster. At the anode, when copper foil used as the current collector it can dissolve in the electrolyte, increasing the self-discharge rate of the battery, and parcipating out as metallic copper when recharged, potentially even shorting out the cell.

don't reuse the nickelstrips you put off but use new ones !!!!

Hi There! Did you manage to save the cells? Thank you for your time.

Hello. Thanks for your vídeo. It helped me to open a PowerPack 500 and change the front cover of the battery. I would like to ask you something: i have one Battery that doesn't work and i suppose that the problem it's related with the integrated circuit in the PowerPack. Do you know where to get a new circuit (or a working circuit) to replace the old one? Thanks for your Vídeo.

I also found out if you cut the metal strip at the battery so you have to flaps spot welded to the battery. You can just twist one and one with some pliers at the battery, and get the spot welds easaly off. Hope this was understanderbal.

640 error code on display what do I do please help . I have never seen this channel on RU-vid performance Line 2017 400

I did't see you repaired this batterypack. Only demolish it

Hallo, ik zoek de defecte Bosch BMS, heb jij nog liggen?

I need the bms system on this battery how do I patience one

careful wearing a ring around electricity

Can i buy a board from you

nice camera angle 22:20

I thought that as soons as the BMS is disconnected from the cells it will destroy itself, as a sort of protection measure by Bosch against DIY practices.