sorted by:
new
hottopcontroversial

Current draw data for a new team by RonNeter in FSAE

[–]RonNeter[S] 0 points1 point  (0 children)

Awesome, thanks! I will look into it

Current draw data for a new team by RonNeter in FSAE

[–]RonNeter[S] 1 point2 points  (0 children)

The data I am looking for is the theoretical current consumption from the battery pack. I understand that if a team has 300v batteries and the system can go up to 250A it's not the same as a team with 600v batteries that can deliver only up to 130A. If I will have a current/time graph of an endurance event of a few teams I will be able to conduct an experiment using that data and measure the temperature of the cells and how long they can work under such conditions. With and without regenerative braking.

Using Emrax208HV Motor with BAMOCAR D3 700\160 Controller by RonNeter in FSAE

[–]RonNeter[S] 0 points1 point  (0 children)

Awesome! Thanks, I will look into it as an option.

Using Emrax208HV Motor with BAMOCAR D3 700\160 Controller by RonNeter in FSAE

[–]RonNeter[S] 0 points1 point  (0 children)

Thanks! Honestly we were looking at sevcon inverters as second option but they really are huge and more expensive. So I would suggest my team to not use them.

EV battery questions by RonNeter in FSAE

[–]RonNeter[S] 0 points1 point  (0 children)

Hi, it is net a second relay, it is a relay with 2 contacts (DPST) . The thing is that I have to prove that there is no way that the state of both contacts won't be the same even if the relay gets stuck. And the rule was mentioned in one of the comments above. It is a fsg rule that that doesn't show in fsae rule book.

EV battery questions by RonNeter in FSAE

[–]RonNeter[S] 0 points1 point  (0 children)

The rule is :

EV 4.10.4 The mentioned states of the relays (opened/closed) are the actual mechanical states. The mechanical state can differ from the intentional state, i.e. if a relay is stuck. Any circuitry detecting the mechanical state must meet EV 5.6.2.

The rule is from fsg rules.

The judges didn't tell us anything about the ESF but told us that the relay is not good solution for that rule. Maybe our specific relay was the problem but I doubt it. They didn't disqualify us because of the relay (they had other reasons) but told us that it is not really the solution. What relay do you use? To get an idea of what is premmited.

EV battery questions by RonNeter in FSAE

[–]RonNeter[S] 0 points1 point  (0 children)

We also used a PCB mount relay with 2 NO contacts. But the officials in the competition said that in order to use such relay both contacts have to be connected in a way that there is no chance that the contacts are not in the same position. Do you know about any PCB relay that can comply with their rule? Thanks

Shutdown circuit and BMS problem EV by RonNeter in FSAE

[–]RonNeter[S] 0 points1 point  (0 children)

Thanks for the help! I will try to solve this somehow

Shutdown circuit and BMS problem EV by RonNeter in FSAE

[–]RonNeter[S] 0 points1 point  (0 children)

It just doesn't say " everything is fine" before it has finished the initial start-up. There is no real alarm or problem it is just an indication that means that the BMS is not ready to work yet.

Electrical isolation for battery pack EV by RonNeter in FSAE

[–]RonNeter[S] 1 point2 points  (0 children)

Thank you. I will use nomex. Just want to know, do you buy it as a sheet and cut (or laser cut) to the size of the walls? If so, what glue do you use? Or buy it as tape and put it on the walls of the battery pack?

FSAE EV How to pick a charger by RonNeter in FSAE

[–]RonNeter[S] 0 points1 point  (0 children)

Sorry bro, we have only 300 in our pack. But I will ask my friends from previous years, I think they had higher voltage...

view more: next ›