Good Links

2s2p Pack

“With Li-ion, the parallel strings are always made first; the completed parallel units are then placed in series” https://batteryuniversity.com/article/bu-302-series-and-parallel-battery-configurations

Combining several cells into a parallel and then adding the units serially reduces complexity in terms of voltages control for pack protection.

part	link	problem
BQ25171QWDRCRQ1	https://www.digikey.ca/en/products/detail/texas-instruments/BQ25171QWDRCRQ1/14004298	800mA output current limit that would be shared in parallel between the battery and the satellite loads
BQ25173QWDRCRQ1	https://www.digikey.ca/en/products/detail/texas-instruments/BQ25173QWDRCRQ1/21442019	for super capacitors & 800mA
BQ24105IRHLRQ1	https://www.digikey.ca/en/products/detail/texas-instruments/BQ24105IRHLRQ1/2170372	Assigned to Vanessa

look into how the battery charger control toggling between charging/discharging states
- does it have a digital pin that you can control dynamically?
- this might effect the design of the rest of the system
- e.g. if the charger only switches to discharging mode when current in=0A, then we will need a load switch to disconnect solar panel power when we want to discharge the batteries
  - this will be somewhat of a big issue because the expectation right now is that the batteries will just be able to kick in naturally when they’re required