Stromer ST1 battery teardown - excellent documentation

[Ravi Kempaiah]

I have followed this blog for sometime and the content is usually very good.

Here is a complete teardown of Stromer ST1 battery pack. The attention to detail is really excellent.

https://syonyk.blogspot.com/2018/10/stromer-st1-electric-bike-battery-pack-teardown.html

Final Thoughts
I've seen some sketchy packs, I've seen some good packs. This pack? This is a good pack. It's well thought out, well put together, has a competent BMS split nicely between the logic and power sections, and it's very well protected. Nobody is going to shake this pack apart and damage it without tossing a bike off a cliff - and even then, the pack would probably be just fine. If anything, it's a bit over built - which impacts weight and cost, but I'm not going to complain too much.

 

[Ebiker01]

I have followed this blog for sometime and the content is usually very good.

Here is a complete teardown of Stromer ST1 battery pack. The attention to detail is really excellent.

https://syonyk.blogspot.com/2018/10/stromer-st1-electric-bike-battery-pack-teardown.html

Final Thoughts
I've seen some sketchy packs, I've seen some good packs. This pack? This is a good pack. It's well thought out, well put together, has a competent BMS split nicely between the logic and power sections, and it's very well protected. Nobody is going to shake this pack apart and damage it without tossing a bike off a cliff - and even then, the pack would probably be just fine. If anything, it's a bit over built - which impacts weight and cost, but I'm not going to complain too much.

TdHitech also makes the packs for BH ebikes.
Not sure if you opened one or not , but it’s exactly the same, the later packs are even safer with the additional glued black rubber strips. I actually by mistake /accident about an year ago dropped the 36volt pack Of my older Evo down a long NyC subway staircase (spare pack in the backpack and backpack fell ) . Needless to say all was perfectly fine and still is.
The thermistor of the pack is really useful when using the Satiator chArger As it shows the battery cells temp. ( for those into the tech stuff it’s a nice detail).
The issue is that a 500wh 48/12.6 BH pAck is 750$ And the 522wh Stromer is 1000$.
The 250$ difference is unjustified.
Or their 983wh for 2.000$ !! That same pack construction in a 600wh is 750$ . I can get 1.2kw for 1.5k. And that’s what i just did awhile Ago...

 

[bluecat]

Here is a complete teardown of Stromer ST1 battery pack. The attention to detail is really excellent.

I've seen some sketchy packs, I've seen some good packs. This pack? This is a good pack.

...and these batteries were packed years ago!

Meanwhile, Stromer shifted from the octagon battery to the square battery, raised the tension to 48V an implemented the EnergyBus-protocol. To ensure the supply line, they work with two different battery packers now.

The latest battery for the outdated ST1 series was the BO630 (=630Wh), US part 400442, list price $999. As this is much money, many ST1 owners her in Europe use re-fitted batteries from 3rd party suppliers.