justlooking808
100 W
- Joined
- Sep 1, 2021
- Messages
- 105
Looked high and low and went trough 10 pages of forum topic and couldn’t find my answer so here goes.
Setup = two battery connected in parallel with different capacity one is 10.5ah and the other is 20ah
Both batteries has own BMS charge port with different max amp rating 10.5ah has 15 amp max (OEM) 20ah has 30amp max rating but both output will be connected together in parallel.
10.5ah battery BMS can handle 5a max for charging and 20ah battery BMS can handle 3a max for charging.
Charge is a 4a charger, might buy a bigger one later depending how long it takes to charge the batteries.
Questions:
1. When charging, can I use a Y adapter to charge both batteries or do I need 2 separate chargers?
2. Can I solder the two BMS charge wires in parallel to charge both at the same time always or is it better to keep each one separate and use a Y adapter?
3. While both batteries are connected in parallel, can I just charge though one BMS and let the other battery get a charge trough the output port?
4. If #3 is possible, do I just alternate charging trough one battery to keep both batteries balanced via charging trough BMS every other charge?
5. If both charge port wire was connected all the time(soldered together) to create one charge port, would there be any negative effects? ( like auto balancing/charging from charge port and output port, since both sides is connected in parallel)
6. If bike pulls 20 – 30amps, would that affect battery as one battery can give more current than the other? Would it cause the one battery to be discharge more than the other and when I let off the throttle, would that cause a surge in energy from one battery to the other to balance the voltage between the two batteries?
7. Any other areas or things I should be concerned about?
8. Should I change the second battery BMS to one that charges and output on the same port/connector, would this be a good solution to adding a second battery?
Thank you for any and all help, once again, I did try searching and didn’t find anything too specific. I did learn a good deal about BMS and it’s functions but still unclear if BMS can only balance trough charge port or can it balance through output as well? If this has been covered, please point me in the right direction as that would be much appreciated.
Setup = two battery connected in parallel with different capacity one is 10.5ah and the other is 20ah
Both batteries has own BMS charge port with different max amp rating 10.5ah has 15 amp max (OEM) 20ah has 30amp max rating but both output will be connected together in parallel.
10.5ah battery BMS can handle 5a max for charging and 20ah battery BMS can handle 3a max for charging.
Charge is a 4a charger, might buy a bigger one later depending how long it takes to charge the batteries.
Questions:
1. When charging, can I use a Y adapter to charge both batteries or do I need 2 separate chargers?
2. Can I solder the two BMS charge wires in parallel to charge both at the same time always or is it better to keep each one separate and use a Y adapter?
3. While both batteries are connected in parallel, can I just charge though one BMS and let the other battery get a charge trough the output port?
4. If #3 is possible, do I just alternate charging trough one battery to keep both batteries balanced via charging trough BMS every other charge?
5. If both charge port wire was connected all the time(soldered together) to create one charge port, would there be any negative effects? ( like auto balancing/charging from charge port and output port, since both sides is connected in parallel)
6. If bike pulls 20 – 30amps, would that affect battery as one battery can give more current than the other? Would it cause the one battery to be discharge more than the other and when I let off the throttle, would that cause a surge in energy from one battery to the other to balance the voltage between the two batteries?
7. Any other areas or things I should be concerned about?
8. Should I change the second battery BMS to one that charges and output on the same port/connector, would this be a good solution to adding a second battery?
Thank you for any and all help, once again, I did try searching and didn’t find anything too specific. I did learn a good deal about BMS and it’s functions but still unclear if BMS can only balance trough charge port or can it balance through output as well? If this has been covered, please point me in the right direction as that would be much appreciated.