Hi Gents,
I've not been getting onto Pedelecs so much recently as I've been a bit busy with some rather special cells I've been working with. These cells are LiFePO4 and are produced by a very famous and regarded by many as the no. 1 cell manufacturer in the world. They certainly perform and not only have the highest energy density of any LiFePO4 cell currently available that I'm aware of, but they also produce amazing levels of current. How about 400A constant out of a 20Ah cell. Even the baby 15Ah cells will deliver 700A for a few second burst whilst maintaining voltage levels above 2.0V. They do not have a problem running an ezee motor Now if you were running 15 or 20 ezee motors, you might be pushing them a bit hard, but they could still do it. Nearly forgot, 7000 cycles lifecycle and 10-15 years if the SOC and DOD is controlled to 85% or so.
Here's some size and weight details:
Model: AHP 70165227 Model: AHP 68150211
Capacity: 20Ah Capacity: 15Ah
Size: 7.0X 165X227mm Size: 6.8X 150X211mm
Weight: 480g Weight: 400g
These cells are a prismatic or foil pouch cell. I've been very busy with getting a good termination method for these cells and now have something I'm happy with. Here's a few pics of a 12S, 15Ah (actually they are generally 16Ah plus) pack I assembled today. This has a total weight of 5.2kg including BMS and a mechanical termination method that is a DIY job if you are reasonably competent.
Anyway attached are a few pics of a 12S 15Ah pack 225mm * 150mm * 81mm (actually a bit thinner than above spec
I've not been getting onto Pedelecs so much recently as I've been a bit busy with some rather special cells I've been working with. These cells are LiFePO4 and are produced by a very famous and regarded by many as the no. 1 cell manufacturer in the world. They certainly perform and not only have the highest energy density of any LiFePO4 cell currently available that I'm aware of, but they also produce amazing levels of current. How about 400A constant out of a 20Ah cell. Even the baby 15Ah cells will deliver 700A for a few second burst whilst maintaining voltage levels above 2.0V. They do not have a problem running an ezee motor Now if you were running 15 or 20 ezee motors, you might be pushing them a bit hard, but they could still do it. Nearly forgot, 7000 cycles lifecycle and 10-15 years if the SOC and DOD is controlled to 85% or so.
Here's some size and weight details:
Model: AHP 70165227 Model: AHP 68150211
Capacity: 20Ah Capacity: 15Ah
Size: 7.0X 165X227mm Size: 6.8X 150X211mm
Weight: 480g Weight: 400g
These cells are a prismatic or foil pouch cell. I've been very busy with getting a good termination method for these cells and now have something I'm happy with. Here's a few pics of a 12S, 15Ah (actually they are generally 16Ah plus) pack I assembled today. This has a total weight of 5.2kg including BMS and a mechanical termination method that is a DIY job if you are reasonably competent.
Anyway attached are a few pics of a 12S 15Ah pack 225mm * 150mm * 81mm (actually a bit thinner than above spec
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