[burpg] Re: Fuse box for ground batteries
- From: Osi Van Dessel <ovdessel@xxxxxx>
- To: burpg@xxxxxxxxxxxxx
- Date: Mon, 14 Oct 2013 14:24:14 -0400
Okay how are the batteries going to be attached? are there specific
connectors or are they just going to be attached to screw terminals? Also
do these snap connectors work
http://www.digikey.com/scripts/DKSearch/dksus.dll?Detail&itemSeq=137921744&uq=635173536871705757
they are similar to the ones sparkfun holds
https://www.sparkfun.com/products/8073
Osi Van Dessel
CAS IT
Mechanical Engineering Class of 2017
ovdessel@xxxxxx
On Thu, Oct 10, 2013 at 12:10 AM, Natalie David <nldavid@xxxxxx> wrote:
> I can also work on this if no one else wants to take it.
>
> Natalie
>
>
> On Wednesday, October 9, 2013, Kelley, Andrew, Todd wrote:
>
>> Hey, I need someone to design a very basic fuse box for our ground
>> batteries. On more than one occasion we’ve accidentally shorted across live
>> 216 Watt batteries (12v, 18A each) which results in an almost immediate
>> eruption of flames from any connected wires. I’d like to prevent this from
>> happening in the field by designing a box that limits current output from
>> the batteries to 3 amps each. ****
>>
>> ** **
>>
>> It’s pretty simple: just a fuse, terminals for the batteries and then
>> terminals for up to 4 2-wire board connections – likely as screw terminals
>> like this: https://www.sparkfun.com/products/8084. Alternatively some
>> kind of snap connector would work. Actually, that’d be preferred. If you’d
>> also like to incorporate a voltage monitoring display on the board so we
>> can see how charged the batteries are it wouldn’t hurt but is a little more
>> complicated (Use a PIC with on-chip ADC and a low-current voltage divider
>> to bring the measurement into readable ranges). ****
>>
>> ** **
>>
>> It should be set up to monitor two batteries in parallel with a separate
>> set of 4 terminals. No external communication is required and it doesn’t
>> need to have the capacity to charge the batteries either. Additionally,
>> Natalie is working on connectors for the battery terminals themselves so
>> you wouldn’t need to worry about that. The fuse should be easily
>> replaceable if it blows at any time and should include an indicator light
>> to verify its status.****
>>
>> ** **
>>
>> I like it done by Oct. 19th when we send the other boards out for fab. **
>> **
>>
>> ** **
>>
>> Let me know if you’re interested. ****
>>
>> ** **
>>
>> ** **
>>
>> Drew Kelley****
>>
>> Boston University****
>>
>> Computer Engineering ‘14****
>>
>> ** **
>>
>> Chief Project Engineer****
>>
>> ANDESITE Satellite Program****
>>
>> ** **
>>
>> Vice Director****
>>
>> Rocket Propulsion Group****
>>
>> http://www.burocket.org****
>>
>> ** **
>>
>
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