Brammo Owners Forum

Quote from: patrick on December 01, 2023, 10:32:34 AM

Currently, I'm buying more from aliexpress and rebuilding all 7 batteries. but not all the 252 units, for now only 52. Whitout the new ones I had less than 4kW/h to use on the bike, and one of the 7 batteries were preaty bad, while all the others were at 50%, the bad one was already at 0%, thats why I was having the B40. Whit the new ones I'm reaching 6kW/h.

Hi patrick, Why are you buying new cells from aliexpress? is'nt it better to swap out all battery modules for better ones ?

The modules that you may find online to buy, may have the same problem as yours right now, depleated batteries. my best solution is replace some of the bad ones. of course you need to know witch ones are KO, for that you must have a capacity mesurement device,

https://www.aliexpress.com/item/1005006144940052.html?spm=a2g0o.detail.pcDetailTopMoreOtherSeller.5.1bceInqOInqO5U&gps-id=pcDetailTopMoreOtherSeller&scm=1007.40000.327270.0&scm_id=1007.40000.327270.0&scm-url=1007.40000.327270.0&pvid=866bc15e-3df1-4725-a0a9-04f5cb6b35c1&_t=gps-id:pcDetailTopMoreOtherSeller,scm-url:1007.40000.327270.0,pvid:866bc15e-3df1-4725-a0a9-04f5cb6b35c1,tpp_buckets:668%232846%238109%231935&utparam-url=scene%3ApcDetailTopMoreOtherSeller%7Cquery_from%3A

Hi all users, this will be my first post, but I've been reading a lot since last year or so.
I bought mine on second handed with 30 000km (18 750 miles) with a B9 fault. then after a few rides the battery went from 90 to 0% and made me think that the batteries were having issues. I started checking one by one and measure their capacity.
some of them are dead, without any capacity to receive or give power, and some are still working. not as fine as I would expected, but currently I 'm buying them from china and replacing the bad ones. here are my results so far, there are still a few batteries to measure their capacity, but look promissing. at least I will be able to rearrange the complete pack of bateries and make them more even.
When I was riding the bike and it sopped, I checked the dash board, and it said that some slots were almost depleated while the others were better. That's why I disassembled all slots and check one by one.

I have already 40 batteries to replace and order 10 more. I built a excel sheet to help me to rearrange the batteries so in the end every slot having the same capacity as all (balancing the complete package  7x4=28 slots)
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I got the exact same problem. on my first ride home I had 100% SOC and as soon as I hit the freeway (100km/h) the bike shut off.
The bike immediatly said 0% SOC. the thing is that i was able to drive home slowly. as soon as I hit the throttle the bike was shutting down again.

I am planning to swap the batteries out for completely different modules (from a volvo XC40) 4s3p * 7 with 196Ah.
so that totals to about 20kwh. the only thing is that the cmu's need to be swapped with the modules. as the bms has a rare canbus signal as far as I researched.

With all the new cells, how much range did you get ?
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Hi...
not sure how much more i did get. but at least my battery number 6 improved a lot. I removed so far 52 batteries that had less than 3800 mA/h and replaced by new ones of 10000mA/h. Also rearrenge all 7 modules to be more equal from each other.
Now I'm stuck at home, since I broke my leg while skiing.....

HadesOmeg Moto Racing had a great 2023 race year and I plan on rebuilding the bike to make it stronger and faster for the 2024 year of racing.  This is a year of no compromises I'm taking what I have learned in 2023 and focus on strengthening the weaknesses the bike had in 2023.  This is a series of build VLOGs for my 2018 Sur Ron Light Bee MX preparing it for 2024.  I've decided I'm not going to get an Ultra Bee it would cost too much money to buy a bike and get it to the level my Light Bee is at so we are going all in on the Light Bee!  We'll show those gassers what a 150lbs electric dirt bike can do!



First off is it's time to replace that wet noodle swing arm.  I am going to redo and refresh the whole rear end of the bike for 2024.  I plan to do it with the KO Moto swingarm.  The swingarm is not stiff and not strong enough to handle the type of riding I am doing.  I have had it repaired 3 times for cracks.  The first time the guy repairing it found 10 cracks he needed to repair.  The support brace just keeps on developing cracks.  Enter the KO Moto Swing Arm.

Hi charlie

sucks to hear you have problems with the battery pack, it's a little difficult to swap out the batteries for differnt / new ones if you don't have knowledge about batteries.

I am planning to rebuild the battery pack of my brammo empulse 2014 with LG Chem cells in 4S modules. and use the CMU's from the old battery pack so I dont have to reconfigure the whole canbus system.

It is at least possible to swap the whole battery pack for a new one with the same cell type. (Lithium-Ion) I can maybe give you some advise on the pack or replacement modules.

Kind regards,

Johan (netherlands)

I know it has been 18 months and things look thin on the forum, but I just replaced the motor unit on my bike and it woke up with the B40 fault. I do not think I have the capacity to rebuild the battery, but I certainly believe I can remove/reinstall . . . anyone know of a person/business capable of a rebuild for me?
The bottom battery is flashing green, while the upper battery is completely dead. It sat uncharged for a year, I really struggled to find a motor unit. I believe if this bike genre is going to continue battery restoration has got to be part of the plan and it seems like some outfits are starting to crop up.
Empulse lifeline requested,charlie