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Flashing red caution light on Super Soco battery BMS board  


CubeyTerra
Posts: 77
(@cubeyterra)
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Joined: 7 months ago

So. I opened my battery. And during that, I caused a brief but energetic short-circuit. Pop!

The battery still has the correct voltage, but now a red light is flashing on the BMS, and the scooter doesn't like it. It gives errors 90 and 92 (over current; over voltage).

What does the flashing red light mean, and how do I get my battery working?

Any help would be much appreciated.

Thanks,

Cubey

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alexaraducristian
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(@alexaraducristian)
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I don't know what red flashing light means, and except the manufacturer nobody knows (or hope I'm wrong), but it's very probable you burned some circuits on BMS which are reading and communicates with instrument cluster.

Just check visually the BMS, some smell from burnes circuits... if it's only a capacitor or resistor (which I doubt), you may have luck, if it's an IC, it would be more complicated. Maybe give the BMS to an electronist, he can measure and try to find out.

Anyway sorry to hear that.

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wagner
Posts: 33
(@wagner)
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maybe a BMS reset helps.
You have to apply a higher voltage then the battery voltage to do that.

If nothing is working, I´d be happy to buy the battery 😀 

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CubeyTerra
(@cubeyterra)
Joined: 7 months ago

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@wagner I'd be happy to try a BMS reset if I knew how. Applying higher voltage to a battery seems a bit risky. How does one do this? 

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wagner
(@wagner)
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Posts: 33

@cubeyterra well in order to charge the battery, the external voltage has to be higher.
So my first step would be connecting the battery to the charger and see how it behaves (should be safe). It it charges: nice!
If it does so, put the battery into the bike and see if it´s working again.

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CubeyTerra
(@cubeyterra)
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@wagner The charger won't engage when I plug it into the battery.

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wagner
(@wagner)
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@cubeyterra do you still have guarantee?

And could you check the battery voltage?

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CubeyTerra
(@cubeyterra)
Joined: 7 months ago

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Posts: 77

@wagner The battery is no longer under warranty, unfortunately. Also, opening it voids the warranty. 🙂

Battery voltage is normal (~63V).

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wagner
(@wagner)
Joined: 4 months ago

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@cubeyterra

I don´t know whether this is good news or bad news for you but it seems like it´s definitely the BMS which is broken.
Unfortunately, I don´t see a reset button on the BMS itself (see for yourself on the pic below).

Either the BMS is actually broken or just stuck and needs to be reset. If I had overcurrent fault code, I used my regen brake to reset it (but I got a different controller that has regen)

If you have a second battery, you could bring both in a parallel connection (if the functional one has higher voltage) and let it "charge" the broken one.

Maybe the charger won´t engage the charging protocol because of something..

20200407 144650
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CubeyTerra
(@cubeyterra)
Joined: 7 months ago

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Posts: 77

@wagner It won't parallel charge, unfortunately, for the same reason that the charger won't engage. The BMS has decided that it won't allow charging.

I'm beginning to think that I'll have to hire somebody to replace the BMS, which is going to cost me hundreds. Alternative is to abandon the battery, even though it's basically fine except for the BMS state.

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