Versions Compared

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.

...

  • Buy better cells, update MPPT to match, improve blackbody A
  • Newer cells (Maxeon Gen 5 and 6) have doubled current so MPPT needs to be redesigned with bigger inductors and capacitors (1
  • BlackbodyA tracks temp and irradiance in car. MISO and MOSI swapped so gonna fix that, simplify with MUX/decoder for RTD, fix shorted I2C wires to support >1 irradiance sensors
  • Matthew is working on /has sims for ideal inductor capacitor size
  • Irradiance sensors: something about there being global and local maxima and there are algorithms to find local maxima but the irradiance sensors tell you when to run to check for global maxima because we don't want to get stuck in a local one but global one takes time so we can't do it all the time,

Diya's Notes

Q: blindspots - how they work 

A: distance sensor

Q: blind spot buzzer? may create a power draw. maybe better integration. raw data on another display that uses CAN. 

Q: Why are we using a two wheel drive?

A: For Controls, it is more work. However, it is overall more efficient. 

Q: where is the display

A: right

Q: Which display

A: Will probably use uart display

Q: What are the switches on the wheel

A: gpio ports

Q: Where is blind spot tracking being placed

A: back left and back right of the car

Q: So there may need to be holes cut out on the back. 

Q: CC is confusing why

A: thresholds have to be reached, so it's unintuitive. that's why second way

Q: back up camera?

A: isolated from control systems. no current plans to change. integrated into display? but no point of integrating into display.

Q: how to coast 

A: use CC. 

Q: pedal input being mapped to?

A: current setpoint. in one pedal mode, velocity. 

Q: SOM 

A: controls daughter board. The naming is confusing. 

Q:scroll wheel for fan

A: might be dangerous because can slip

Notes on Power Gen Presentation

Diya's Notes

solar array, 3 sub arrays. MPPT = Maximum Power Point Tracking 

...

- Manufacture HV battery pack
- Improve Battery Pack Safety
- Faster Manufacturing
- Better Power Usage
- Improve charging efficiency between battery and array
- Has there been any noticeable improvements from characterizing each cell individually that would be lost from just taking samples from each box?
- From current characterization stuff, how much do the cells each actually differ in terms of characteristics?

Diya's Notes

Areas of improvement include stiff and hard to connect. Is there any advantage to having them paired up? A: no, we want them to be modular. when you say modules what is it. A: 9 cells. 

...

Goals:
- Standardize software drivers
- Transition to SOM
- New hardware to use common protocols
- How do you monitor the battery health now? Why is it a "nice to have" rather than "must have"?
 - Wanna know how damaged the cells are
 - We don't currently monitor the battery health
- Actively monitor isolation between frame and HV line (isolation is  required by regs, but active monitoring is not (clarify this))
- Switch to CAN from isoSPI
- Tachometer feedback from fans

Diya's Notes

BPS minions - 3 for the peripherals

...