Can I charge a scooter equipped with a scooter BMS using different power adapters?

I forgot to bring the power adapter I originally used to charge my motor scooter on vacation. There are a couple of charging options that I'm not sure are feasible at this point: 1. whether it is possible to charge the scooter using a 12V 10A power adapter, even though the original charger was 42V 3A. 2. I also have an e-bike charger with 54.6V 2A but the adapter connector doesn't match, but an adapter could be used to get around this. 3. in addition, I have a P10 smart charger for equalizing charge 2-6S batteries. I want to get at least a partial charge and my electric scooter is equipped with a rugged BMS, will it protect the battery from damage from low or high power supply?

Even if your rechargeable scooter is equipped with a robust BMS, none of the different sizes of power adapters you mentioned are suitable as charging options.

  1. Since even an “empty” 10S battery pack may already be close to 30V, a 12V charger is probably not going to raise the battery pack voltage to a higher level. Plugging a 12V charger into a charging port where the pack voltage is already close to 30V (or higher) could potentially damage the charger, and even with a BMS, it may not be able to completely stop the current from flowing into the charger and causing a short circuit.
  2. The BMS can only protect the battery pack and itself, but its protection range is limited by its rated maximum voltage. Therefore, using a 54.6V power adapter may exceed the rated voltage range of the BMS, resulting in potential BMS damage.
  3. The S-6S charger is also unable to charge a battery pack whose voltage is already approaching 30V or higher.

So, I would recommend not using an existing charging device to attempt charging to avoid potential damage.

MORE: Can a 3s lithium battery pack with a 20A BMS be charged from a 12V 3A power supply?

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