drcat
Posts: 24
Joined: Tue Dec 08, 2020 3:21 am

DIY Battery Upgrade Project

Hello guys

I'm starting my battery upgrade project. A hobby one. Not sure if I'll ever finish this but will publish any progress and will answer any questions I can.

So first... there are some hobby projects around installing an extra battery in parallel or replacing all the cells with MMCs having more capacity and complains about its impossible to make the car thinking of the real mileage thus requiring some effort like unplugging 12V battery to pull more energy from the traction one.

I've started from resolving this and here's what I've got...
https://youtu.be/8KV6SuI31YE

I was able to make it thinking it has a much larger battery really cheap. Need to drive it for a while and see how it behaves on chademos with a hack like that.

Next, I'll need to buy cells for repacking and do the whole thing. Sounds like a long story. Let's give it a try...
Pepin
Posts: 8
Joined: Wed Oct 28, 2020 2:26 am

Re: DIY Battery Upgrade Project

drcat wrote:Hello guys

I'm starting my battery upgrade project. A hobby one. Not sure if I'll ever finish this but will publish any progress and will answer any questions I can.

So first... there are some hobby projects around installing an extra battery in parallel or replacing all the cells with MMCs having more capacity and complains about its impossible to make the car thinking of the real mileage thus requiring some effort like unplugging 12V battery to pull more energy from the traction one.

I've started from resolving this and here's what I've got...
https://youtu.be/8KV6SuI31YE

I was able to make it thinking it has a much larger battery really cheap. Need to drive it for a while and see how it behaves on chademos with a hack like that.

Next, I'll need to buy cells for repacking and do the whole thing. Sounds like a long story. Let's give it a try...
Hi . What type of cell you will choose?.
drcat
Posts: 24
Joined: Tue Dec 08, 2020 3:21 am

Re: DIY Battery Upgrade Project

Pepin wrote:Hi . What type of cell you will choose?.
I've almost bought NMx SVolt. Not a bolt-in but much easier to build - 8s1p modules @80+ Ah...
Just was thinking for too long (a day) so someone bought those before I considered.
Tiborx8
Posts: 43
Joined: Sat Jun 08, 2019 11:15 pm

Re: DIY Battery Upgrade Project

Great work. Did you consider using Catl MNC 3.7v 93Ah cells?
drcat
Posts: 24
Joined: Tue Dec 08, 2020 3:21 am

Re: DIY Battery Upgrade Project

Tiborx8 wrote: Sat Mar 26, 2022 3:45 pm Great work. Did you consider using Catl MNC 3.7v 93Ah cells?
Due to current situation in region, everything is on hold now :(
Tiborx8
Posts: 43
Joined: Sat Jun 08, 2019 11:15 pm

Re: DIY Battery Upgrade Project

Sadly...I fully understand. All my best.
Tiborx8
Posts: 43
Joined: Sat Jun 08, 2019 11:15 pm

Re: DIY Battery Upgrade Project

Hi,
if you have the time and possibility, would you mind letting me know what arduino setup you used? is it a due with two can shields, or a double can bus shield? I tried to find a working solution for the man-in-the-middle can action, but could not find a fully appropriate one.

Best regards.
kiev
Posts: 1777
Joined: Sun May 03, 2015 7:15 am
Location: The Heart o' Dixie
Contact: Website

Re: DIY Battery Upgrade Project

take a look at the github/dkotin/can_2515 folder for examples and details, schematic, etc.

drcat put the exact site link in his video above.
kiev = kenny's innovative electric vehicle

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