completelycharged
Active member
- Joined
- Mar 7, 2018
- Messages
- 1,083
Yep, not 18650 cells...
This is with the standard 66160 LTO cells that are in 30Ah to 40Ah capacity. The 30Ah cells are widely available as recycled units.
The cells are arranged in an 11s2p pack with a small space between the cells for additional air circulation and tollerances.
Additional small holes in the joining plates (2mm Aluminium) are to screw the bars into an outer wooden frame. and for connecting BMS cables.
The LTO cells have a working range between 2.7V and 1.5V and clipping the top and bottom of the voltage ranges to where the capacity lies with an 11s arrangement this gives the closest proxy to a standard 24V lead-acid battery voltage range and makes it more compatible with a standard UPS unit.
Each pack will then be 24V and a capacity of 2kWh (using 40Ah cells).
External connection will be via two XT90 connectors so that either more than one connection can be made or two connections to a cental busbar.
This is with the standard 66160 LTO cells that are in 30Ah to 40Ah capacity. The 30Ah cells are widely available as recycled units.
The cells are arranged in an 11s2p pack with a small space between the cells for additional air circulation and tollerances.
Additional small holes in the joining plates (2mm Aluminium) are to screw the bars into an outer wooden frame. and for connecting BMS cables.
The LTO cells have a working range between 2.7V and 1.5V and clipping the top and bottom of the voltage ranges to where the capacity lies with an 11s arrangement this gives the closest proxy to a standard 24V lead-acid battery voltage range and makes it more compatible with a standard UPS unit.
Each pack will then be 24V and a capacity of 2kWh (using 40Ah cells).
External connection will be via two XT90 connectors so that either more than one connection can be made or two connections to a cental busbar.