So maybe brother has a razor e-300 electric scooter and has asked me to upgrade it for him
I found out they use some big bulky batteries which are really inefficient.so would like to swap those out.
They use 2 x 12v 7ah batteries so guessing without changing the controller I will have to stay at 12v?(is that right)(not sure if it is in parallel or series)
Also will it make a difference if I use a higher amp rated cell or would it ruin their controller??
For the moment I am thinking just changing batteries but in the future I could swap to a flipsky 4.12 vesc and a larger aps motor.
WhAt do you think and also would cells would get me the most range for a low price and high amps are not required?
If they’re in series 24V, if in parallel, 12V. Or use a voltmeter to find out.
If you plan on upgrading the ESC and motor to more powerful ones, then 30Q would be a better cell choice. If you stick with the current ESC, and know that it draws very little power anyway, then you could do 35E.
This seems like the type of project that could be done much more easily by getting rid of the previous internals and putting new everything in… But this is more fun
As for the battery, find the charger. The charger will tell you the total voltage and then you can decide how many cells will go together in series.
That’s not really how it works.
The controller pulls the energy from your battery, meaning it dictates the amperage drawn.
Didn’t you make a custom build? This knowledge is pretty basic, maybe you should read up a little bit.
Looked a bit into it, the charger is 24V, and the scooter itself is advertised as 24V, so it is safe to say that the two battery packs are in parallel.
EDIT: brain fart, Since you found 2x 12V batteries, they are in series. Thanks @Agressivstreetlamp for pointing out.
The motor is brushed DC, so you if you are planning to eventually get a VESC, you will need to change the motor as well.
You can get as big of a battery as you can afford or fit, the controller and motor will only use what it needs.
Also, li ion might not actually be your best chemistry for this.
Quick mafs:
24/4.2 = 5.7777ish
24/3.6 (lifepo4) = 6.66Ish
THUS, if you stayed at 6s and used lifepo4 cells you would end up with a ‘safer’ (for the ESC) scooter with what I would consider good range. Keep in mind you wouldn’t be able to fit as many cells, since a123s are thicker than 18650s…
Or you could stay at 5s li ion, if you really wanted to 🤷
I think that behind Bill and Damon who literally had to set the forum up, you have more topics created than any other user, and they only have a few more than you.
I think that every 4 times you open your browser and visit the forum you create a new topic.
I think that for every 2.1 hours of reading you have done on this forum you have created a new topic.