agt
Posts: 9
Joined: Sun Dec 04, 2016 8:58 am
Delivery Date: 20 Nov 2016
Location: San Diego, CA USA

Re: Using air conditioning to reduce battery pack tempature

Fri Aug 10, 2018 10:12 am

Nobody is proposing doing anything with the Service Plug. The Service Plug is already weather proof, a little cool air blowing over it shouldn't hurt anything. If you are worried about something dropping down the opening then you can always put a screen over it.


Are you suggesting removing the plastic cover plate, or also the metal plate secured with 10mm bolts?

If only the former, the HV components would seem well-protected; but without the metal cover, what would prevent a spilled drink (or a water from a firefighter's hose) from infiltrating and shorting the 400V DC fuse assembly?

At the very least, some sort of splash-resistant cover would seem in order.
2016 S - San Diego (Mira Mesa), CA

TexasLeaf
Posts: 52
Joined: Wed Mar 21, 2018 5:37 am
Delivery Date: 21 Mar 2018
Leaf Number: 303111

Re: Using air conditioning to reduce battery pack tempature

Fri Aug 10, 2018 10:30 am

agt wrote:Are you suggesting removing the plastic cover plate, or also the metal plate secured with 10mm bolts?

If only the former, the HV components would seem well-protected; but without the metal cover, what would prevent a spilled drink (or a water from a firefighter's hose) from infiltrating and shorting the 400V DC fuse assembly?

At the very least, some sort of splash-resistant cover would seem in order.


Removing both the plastic cover plate AND the metal cover plate. You appear to be struggling with the concept of "weatherproof". The car could be sitting at the bottom of a lake and the Service Plug still wouldn't short out.

agt
Posts: 9
Joined: Sun Dec 04, 2016 8:58 am
Delivery Date: 20 Nov 2016
Location: San Diego, CA USA

Re: Using air conditioning to reduce battery pack tempature

Fri Aug 10, 2018 12:33 pm

Removing both the plastic cover plate AND the metal cover plate. You appear to be struggling with the concept of "weatherproof". The car could be sitting at the bottom of a lake and the Service Plug still wouldn't short out.


I'm curious - what in particular makes the connector weatherproof? I admit I haven't opened my own disconnect, and am only basing my questions off images on the net, e.g.

Image
Image

Is there gasket material not displayed here? Otherwise it seems like a couple of cups of liquid could short the two HV legs to the chassis...
2016 S - San Diego (Mira Mesa), CA

TexasLeaf
Posts: 52
Joined: Wed Mar 21, 2018 5:37 am
Delivery Date: 21 Mar 2018
Leaf Number: 303111

Re: Using air conditioning to reduce battery pack tempature

Fri Aug 10, 2018 1:27 pm

agt wrote:
Removing both the plastic cover plate AND the metal cover plate. You appear to be struggling with the concept of "weatherproof". The car could be sitting at the bottom of a lake and the Service Plug still wouldn't short out.


I'm curious - what in particular makes the connector weatherproof? I admit I haven't opened my own disconnect, and am only basing my questions off images on the net, e.g.
Is there gasket material not displayed here? Otherwise it seems like a couple of cups of liquid could short the two HV legs to the chassis...


That latch creates a pressure seal. Plus there are channels to keep any moisture that makes it past the seal from getting to the contactors. The only way you are going to get moisture on those contactors is if you pull the latch and pour water directly on the exposed contactors.

I also might point out that the service plug is located on the OUTSIDE of the car and is not otherwise protected from the elements. Whenever you drive the Leaf through heavy rain or through a big mud puddle the entire battery pack will get drenched, including the service plug. Your entire argument that a little moisture that you might spill through the service plug port is going to short out the service plug defies all logic.

BrockWI
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Re: Using air conditioning to reduce battery pack tempature

Mon Aug 13, 2018 11:56 am

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TexasLeaf
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Leaf Number: 303111

Re: Using air conditioning to reduce battery pack tempature

Tue Aug 14, 2018 5:30 am

BrockWI wrote:Lemon Tea trying to do this as well

https://www.youtube.com/watch?v=6HcM47nWEoQ


I think there are things James could have done to significantly improve his results. One thing is that James did not use the air conditioning to cool the battery, he just forced fresh air ambient air down the port. Forced air that's cooled 20 degrees F below ambient, especially during charging with the hood open to release waste heat, should do much better at cooling the battery.

Also those fans probably did more to restrict the air flow than to improve it. Just having the AC in Fresh Air mode with a fully open port should throw plenty of air down the port. Also taping up the exhaust grilles in the trunk should guarantee that most of the Fresh Air goes down the port.

I am planning a structured test this weekend to see how much blowing cold air down the Service Plug port, using the techniques I have outlined, helps cool the battery. I will post my results once I have completed the test.

DaveinOlyWA
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Re: Using air conditioning to reduce battery pack tempature

Tue Aug 14, 2018 6:26 am

Even if the plug did not create a water tight seal (it does) realize a bowl over the top of the plug would prevent water from getting in due to pressure, right? Any water would have to rise inside the bowl against that pressure which will be done if enough water is added but realize its not contained so water will just run out thru the bottom making any random spill HIGHLY unlikely to do much of anything.
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 deceased. 29,413 miles. 2018 S40; 8743 miles, 485 GIDs, 37.6 kwh 111.39 Ahr , SOH 96.49, Hx 114.98
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agt
Posts: 9
Joined: Sun Dec 04, 2016 8:58 am
Delivery Date: 20 Nov 2016
Location: San Diego, CA USA

Re: Using air conditioning to reduce battery pack tempature

Tue Aug 14, 2018 3:28 pm

I haven't found precise specs on the Nissan service disconnect, but did locate a similarly designed AMP connector which is only rated at IP5K2, suitable for "Dripping water when tilted up to 15°". The sealed version of the same plug, with integral gaskets, is IP6K9K and is probably fine to 100M as suggested.

http://www.te.com/content/dam/te-com/documents/hybrid-and-electric-mobility-solutions/global/8-1773465-86-sd-125.pdf

I look forward to hearing how the experiments go.
2016 S - San Diego (Mira Mesa), CA

agt
Posts: 9
Joined: Sun Dec 04, 2016 8:58 am
Delivery Date: 20 Nov 2016
Location: San Diego, CA USA

Re: Using air conditioning to reduce battery pack tempature

Fri Aug 17, 2018 5:45 pm

A friend pointed me towards the Yazaki 7225-5302-51 assembly, which does seem to match what's in my 2016 S.
2016 S - San Diego (Mira Mesa), CA

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