Batteries Charging Routine
- Thread starter Az.
- Start date
I'd have a stab at it, but I don't have any Bosch power tools
Unless someone can donate one for me to experiment with? Wouldn't even need to have the whole battery, just the mounting plate part.My lawn mower is an Einhell and it's only 18V (against my wishes I was given this, I wanted something with more guts to it.) I think all the other power tools are 18V too. Got a Ryobi hedge trimmer - 18V, some Dewalt drills at 18V. The strimmer might be 36V, but I'm not sure on the make, I inherited it when I bought the house. I suppose two 18V DeWalt packs could be mounted in series...
Can't help thinking it would be better to adapt the lawnmower to take a silverfish e-bike battery...
don't forget the issue of public liability whenever you put something in the market. If the bike battery sets fire to their garage, you may be jointly liable.
Ah, I wasn't thinking of selling, more of a hobby open source project
You can get a kit that is the battery holder, PCB, and internals for building your own. Thats £40 though.
Looks like there are a lot of Bosch battery copies on eBay. Probably the factory in China that makes the real Bosch batteries also sells on the parts to others, who then fill them with generic cheap cells. I have seen some on eBay that are way too cheap to be any good.
They have the same physical size but the polarisation key makes sure you can't use them in the wrong adapter
Last edited:
Makes sense, you wouldn't want someone plugging a 36V pack into an 18 V tool. How easy would it be to mod the 18 V base to fit a 36 V pack?
You can't because of the molding. The middle blade is the polarisation key. It is placed in slightly nearer to one side in the 18v
No conventional BMS in these batteries;
36V 2.6Ah BOSCH Power Tool Battery Repair and Upgrade to 6.0Ah (Lithium)
36V 2.6Ah BOSCH Power Tool Battery Repair and Upgrade to 6.0Ah (Lithium)
Interesting. So no balancing function, no individual cell undervoltage protection, no individual cell overvoltage protection.
Although some cells had died, most were still functional after more than 20 years and still quite well balanced.
I think this is the spec sheet for the Samsung SDI 1300 mA. So 4A max charge rate and 15 A max discharge:
Here's a strip down of the 18 V Bosch. It does seem to have tapping points for balancing etc. Looks like they have sleeveless cells in an insulating cylinder and then the balance wires are pushed up against the sides rather than soldered.
Yes, interesting.
Maybe more modern ones are different.
Lots of stuff about eBike fires in the news these days, not much about power tool fires.
The LFB haven't reported being called to car fires every two days either.
E-bike battery fires prompt call for better regulation
A charity says batteries for e-bikes should require third-party approval before being sold in the UK.
www.bbc.co.uk
