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I installed a 3rd-party battery management system and it worked! 😮

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CubeyTerra
Posts: 97
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(@cubeyterra)
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Joined: 2 years ago
IMG 6787
IMG 6788

After melting down the BMS in a Soco battery AGAIN, instead of buying another of the same BMS, I opted for a 3rd-party board that's rated for more current than the original. 

Its bought from YYBMS.com via AliExpress for just under $100US. The connectors are different from the original, so I had to do some detective work before plugging it in. The form factor is ALMOST identical to the original BMS, but some components prevent it from sliding into place; I had to clip off bits of plastic from the battery rack.

anyway, if you're good with electronics, this seems like a better and cheaper alternative to simply replacing a burned-out BMS.

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Bvzijverden
Posts: 31
(@bvzijverden)
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Joined: 1 year ago

Thank you for sharing! Next week I will receive my TC and the first thing is to expand the battery pack, after reading your post I might also change the BMS whilst I'm at it.
How did you burn out the original BMS (hot weather, going up steep hills, etc)?

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CubeyTerra
(@cubeyterra)
Joined: 2 years ago

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@bvzijverden May I suggest being very cautious about deciding to open the battery. It very dangerous. Touch the wrong two things, and POP. A chunk of your finger vaporized. 😱

How I killed my BMSs: 

  • Overheating
  • Overheating and fire
  • Accidental short (vaporized the ends of my wire cutters!)
  • Mystery failure

Isnt it interesting how the Soco BMS is so unreliable that now there are multiple shops selling replacements specifically for the TS/TC? 🙄

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Bvzijverden
(@bvzijverden)
Joined: 1 year ago

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Posts: 31

@cubeyterra the battery of the TC/TS is indeed powerful to require some expertise in batteries because it can get pretty dangerous, pretty quick like you mentioned.Luckily I'd consider myself more than adequate to make my own pack but I was just curious as to why you had blown out various BMS' already.

I concur that its not a coincidence that there are 3rd party BMS' available that are specifically designed for the TC/TS.. the original ones are obviously not of the highest quality.

Anyway, thank you for clarifying the reasons behind the failures, I'm very curious what the mystery failure could be haha.

Take care.

Bob

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m66
Posts: 70
 m66
(@m66)
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50A... so 3kW finally. Do you know what Voltage and Amperage engine can take? I heard is rated fo 10kW 

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arjan_1980
(@arjan_1980)
Joined: 6 months ago

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Posts: 37

@m66 

The engine won't like that amount of power, I am using a sabvoton controller which can spit out 150A continues, i tried it on stock settings and the engine got very hot on a short run, so i had to reduce the operating current.

 

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m66
 m66
(@m66)
Joined: 1 year ago

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@arjan_1980 hmm... putting ferrofuid coolant inside may help... still it's pisses me off... they say 3kW and we received 1,8 kW peak

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imtwisted
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(@imtwisted)
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Joined: 2 months ago

Hello there, I am currently putting the exact same BMS in a 72V TCMax battery. I have it open and everything is going fine, except there are more wires on the stock BMS than 3rd party.

As you have already installed one, would it be too much to ask you to post a wiring diagram or something to help me out.

It would be appreciated immensely.

Matthew

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ElectroChris
(@electrochris)
Joined: 11 months ago

Active Member
Posts: 5

@imtwisted If youve got the same BMS shown at the top then that will probably not work for your battery

The BMS picture above is designed for the TC battery which is 60v compared to your 72V TC Max battery so has less cells in series so needs less balance leads.

Not sure on the exact spec of the TC Max battery but the TC battery is 17s9p so has 17 cells in series and 9 in parallel, due to the higher voltage of the TC Max battery it will have more cells in series so needs a BMS that is compatible with more balance leeds.

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Eva Gao
Posts: 2
(@eva-gao)
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Joined: 2 months ago
I'm in the same situation. My original is broken. I read many forums and tried many brands. Finally, I chose yanyang's products. It feels very easy to use. If you have any needs, I recommend to try them.。
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