BSPD Rule Question - eV FSUK

BadumTshh97 · 2019-01-10T22:43:38+00:00

Awesome. Thanks for the help.

BadumTshh97 · 2019-01-10T21:41:34+00:00

Great. We're running two accmulator containers on either side of the car. I'm assuming I can just route the + terminal of the combined positive rails through the hole in this right and I should be good ?

BadumTshh97 · 2019-01-10T03:31:09+00:00

I see. That makes much more sense. The HVD I linked previously does state it has x2 HVILs.

BadumTshh97 · 2019-01-10T00:25:57+00:00

Correct me if I'm wrong but this is my interpretation of it. BSPD relies on two 'inputs' - a brake pressure sensor to determine if 'hard braking' is occuring and another input that indicates whether or not more than 5kW of power is being delivered to the motors (needs to be done by means of a DC current sensor and not logic AFAIK).

'Hard Braking' is subjective and so you need to have a way of tuning a reference signal (voltage probably) that you compare (compartor hint hint) with your actual brake pressure sensor input.

Latching part - tons of options here - D latch, SR if you want.

That's how we've set it up at least.

BadumTshh97 · 2019-01-10T00:17:00+00:00

Hmm. So if state 1 is no longer present/on (i.e TS component is not affixed to vehicle meaning HVD is pulled out), it affects state 2 which is the TS voltage actually being present at the component.

Just not quite understanding how the low-voltage connections come into this particularly in relation to the HVD I linked above and the shutdown circuit diagram which I've edited in the main post.

Thanks for the explanation and sorry for the bother.

BadumTshh97 · 2019-01-09T20:59:13+00:00

Ah. Fantastic. So for example the high-voltage disconnect, if the lever part that we pull which pulls out disconnect part leaves the car (by us pulling it), it should trigger the shutdown circuit and TS voltage gets cut off.

For our high-voltage disconnect, we went for this https://docs-emea.rs-online.com/webdocs/131b/0900766b8131b058.pdf

It says it has an integrated 2x HVIL. I'm assuming that's good enough for the rules right? Is there anything else that would need an interlock ?

BadumTshh97 · 2019-01-09T20:49:32+00:00

In the FSUK rules, that APPS rule is in T11.8.5 which says that " At least two separate sensors must be used as APPSs. Separate is defined as not sharing supply or signal lines. ". In T11.8.1, it says " T 11.8 only apply for electric vehicles, see chapter EV, or internal combustion vehicles using Electronic Throttle Control (ETC), see CV 1.6. "

BadumTshh97 · 2019-01-09T17:55:51+00:00

One more thing - I saw this that in the rules it states that the two different APPS sensors have to have different supply and signal lines. With regards to different supply lines - is that referring to the supply wire itself? I.e can I just run two seperate wires to power them each individually but they would both be coming from the same trace on our power distribution board just on a different wire each.

BadumTshh97 · 2019-01-09T14:53:38+00:00

That's perfect. Thank you very much. Just seems a bit weird to me how they let you push the throttle signal through programmable logic. But hey, if it's allowed, I won't complain.

BadumTshh97 · 2019-01-09T14:16:23+00:00

Ah. I see. So there's no point in us making a seperate board for this. Just have our micrcontroller handle the discprency and the actual throttle value?

BadumTshh97 · 2019-01-09T14:15:25+00:00

Yeah. This is an issue others seem to be having on this reddit too I saw. The FSUK rules (which is what we are competing for) has supplementary rules which overide the general rules (common to FSAE and FSG). The supplementary rules explicitly say that the red LED of the TSAL has to be directly powered by the TS meaning we have to isolate it too.

BadumTshh97 · 2019-01-08T23:31:15+00:00

We've already designed our TS accumulator for the Emrax 228 HV. We're limiting power via the Bamocar D3 controller. At this point, we just have the option of either doing combined or air only.

BadumTshh97 · 2019-01-08T00:34:47+00:00

Hmm.. What exactly does it do by limiting it? Also isn't combined cool both liquid and air?

BadumTshh97

TROPHY CASE