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Battery upgrade

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Posts: 96
Topic starter
(@socomods)
Trusted Member
Joined: 4 years ago

I am looking at getting a new battery for my bike, but i am not sure how tied into the controller, the official battery is ...if i try to connect a different battery, is it going to complain/start?

 

I have a found a few potential options, 60V, 40-100aH w/ 60A/70-100A, but even with the cost difference its not money i want to waste

 

(i think mine is the "Lite" - wasn't called that when i got it in 2017 tho, was just a super soco lol not sure if its TS or TC either..)

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Posts: 42
(@socobelfast)
Eminent Member
Joined: 5 years ago

If you search DIY Battery, there's a thread with discussion of a battery upgrade. From what I learned there, you connect the original battery as usual and the additional battery in parallel. This ensures the controller accepts it. Without the unique BMS (Battery Management System) contained in the original battery, the bike's controller will not display the remaining battery percentage.

 

I'm building a new battery with Samsung 50E cells, and I'm going to run it in parallel with the original. Like yourself, I was just too cheap to buy the official branded battery replacement. The voltage requirements are that you use a 17 series configuration. With each cell charged to 4.1V, a fully charged battery will be 69.7V. In order to double the capacity, I'm using a 6 parallel configuration (17s6p), with 5000mAh cells, which will give a total capacity of 30Ah. I plan on having the project finished by Jan 1st, because Deliveroo are offering a premium on deliveries that day and I'm hoping to make a bit of cash!

 

It's really important that you make sure that any battery run in parallel is the same voltage as the original. That means not plugging in the second battery unless they are both fully charged to 69.7V. I've been watching tutorials on Youtube, if you search ebikeschool you'll get a ton of really good intructional videos (the music is awful but hey ho!).

 

Good luck with your project. I'll post a thread when I finish my project to let you know how I got on.

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(@socomods)
Joined: 4 years ago

Trusted Member
Posts: 96

@socobelfast

thanks for the reply - had a read of that thread, I don't really want to carry two batteries around tbh; most of the batteries i am looking at have a V meter built in, and it wouldn't be hard to rig one up - is that the only trade off?

that seems worth it to me, and def cheaper than changing controllers for now, or rebuilding the soco battery - not sure if this breaks insurance tho

 

good luck too! been waiting my whole life for electric motor bike i could play with and change 😁

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Posts: 96
Topic starter
(@socomods)
Trusted Member
Joined: 4 years ago

eventually i want to change the motor, controller and rear suspension, then assuming i can get it insured, crank up the battery power a little

 

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