achewt
Posts: 63
Joined: Mon Mar 31, 2014 11:45 am
Delivery Date: 09 May 2014
Location: Nelson, BC

Re: clunk from battery area after climbing 2000ft (600m)

Thu Dec 31, 2015 4:34 pm

knightmb wrote:What was the beep before the clunk sound? It sounds like the beep confirmation is turned on in the NAV but I didn't see anyone using the NAV in the video? It sounded like the low battery warning beep?
The beep was indeed the Low Battery warning. My car now gives a truncated message by the lady, which is handy since I see LBW fairly often ;)
Ocean Blue 2014 SL, 166,000km as of Sep 2018, 80% SOH
1 bar lost Aug 31/17 @ 54.5Ahr 83%SOH 79.72%Hx 127,413km
Commuting 142km round-trip; level 2 at home, level 1 at work
http://kootenayEVfamily.ca

achewt
Posts: 63
Joined: Mon Mar 31, 2014 11:45 am
Delivery Date: 09 May 2014
Location: Nelson, BC

Re: clunk from battery area after climbing 2000ft (600m)

Thu Dec 31, 2015 4:38 pm

Nubo wrote:Sounds to me like a metal panel "beer-canning" due to pressure change. As I think I previously noted, I'm not sure if there is any provision in the battery case for pressure equalization, or if the case is simply meant to expand and contract. If the former, then perhaps a valve/vent/filter is blocked. If the latter then could just be an accident of geometry or stamping. Or I could speculate that pack attachment bolts (or something bolted TO the pack) need to be re-torqued. I might consider it a minor annoyance but given the electrical smell I'd say have Nissan look into it.
Due to a broken charger in the town I work in (someone backed into the pillar and knocked it over!), I ended up having to drive up to the mountain town of Rossland this afternoon to charge. I got the clunk just before getting into town. I flipped to the battery cell screen of Leaf Spy and nothing odd showed up there; temps all normal, cell voltages too. I parked the car, plugged in and sat in it for 5 minutes, and it clunked again as I was sitting there. I also did not get any 'electrical' smell... so now I'm not sure what to think. Perhaps it is just the battery shell "beer-canning" as you've suggested.

Perhaps it is meant to be vented, but mine is blocked? I have driven on a number of gravel and muddy roads, so possible I've flung up some debris into a vent. I'll put it on the list of things for my dealer to look at when I make the 380 km trek over the mountains in May! (I also need to get the brakes reprogrammed according to a letter from Nissan.)
Ocean Blue 2014 SL, 166,000km as of Sep 2018, 80% SOH
1 bar lost Aug 31/17 @ 54.5Ahr 83%SOH 79.72%Hx 127,413km
Commuting 142km round-trip; level 2 at home, level 1 at work
http://kootenayEVfamily.ca

knightmb
Posts: 420
Joined: Mon Jan 12, 2015 7:41 pm
Delivery Date: 15 Sep 2013
Leaf Number: 414897
Location: Franklin, TN

Re: clunk from battery area after climbing 2000ft (600m)

Thu Dec 31, 2015 5:19 pm

achewt wrote:Perhaps it is meant to be vented, but mine is blocked? I have driven on a number of gravel and muddy roads, so possible I've flung up some debris into a vent. I'll put it on the list of things for my dealer to look at when I make the 380 km trek over the mountains in May! (I also need to get the brakes reprogrammed according to a letter from Nissan.)
The battery is completely sealed, I've seen test pictures where the whole case is submerged under water in a pool with no leaks. So with no vents, it is possible the elevation and temperature changes are doing this. I've driven up and down some +5000 elevation changes here in TN (going through parts of the smokey mountains) where my ears pop and my eyes water from the elevation changes, but never heard anything like you experienced, I would be curious as to the cause as well.

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abasile
Posts: 1922
Joined: Thu Sep 02, 2010 10:49 am
Delivery Date: 20 Apr 2011
Location: Arrowbear Lake, CA

Re: clunk from battery area after climbing 2000ft (600m)

Fri Jan 08, 2016 3:53 pm

I haven't encountered any of this, either, and I've done a number of 5000ft (1500m) climbs in the LEAF. I've also driven some bumpy dirt roads, through water, and over plenty of ice and snow. Hope it's nothing serious.
2011 LEAF at 71K miles, pre-owned 2012 Tesla S 85 at 98K miles
LEAF battery: 9/12 bars and < 49 Ah (-28% vs. new)
Tesla battery: 250+ miles of range (-5% vs. new)

Franktpw
Posts: 1
Joined: Mon Feb 20, 2017 6:18 pm
Delivery Date: 21 Feb 2017

Re: clunk from battery area after climbing 2000ft (600m)

Mon Feb 20, 2017 7:27 pm

I have a 2013 SL Leaf that I've owned for a year and a half now. I've never heard this 'clunk' until the past few weeks. I commute up a pretty steep grade from Denver to my home in Evergreen - about 2500ft (750m) five days a week - and have since I've owned the car. And reliably, within a mile or so each time I drive up these past few weeks, I hear (and feel in the seat) this same 'clunk' that you describe and have recorded in your video. For me, the battery charge is always right around 60% - do to the fact that I'm driving the same route each day. Air temperature has typically been in the 40 deg F (4 deg C) type of range the past few weeks. Then, a couple times, when I've been stopped at a red light after getting off of the highway the past couple days, I'll sit for less than a minute and hear the same 'clunk' again - but haven't heard the second 'clunk' if not stopped by a red light. Any updates?

achewt
Posts: 63
Joined: Mon Mar 31, 2014 11:45 am
Delivery Date: 09 May 2014
Location: Nelson, BC

Re: clunk from battery area after climbing 2000ft (600m)

Mon Feb 20, 2017 8:57 pm

Hi Frank, no updates to report. Battery health degradation seems normal, and I'm nearing 108,000 km (67k miles). I still get the clunk when making climbs from the valley bottoms around here (about 500 m) once I've climbed about 600 m (2,000 ft); my local ski hill is actually an 1,150 m climb, and I do not get a second clunk. I've not smelled anything other than that one time either, so I think that was a coincidence. Probably the tin-canning as someone described earlier up thread.

What is interesting to me though is that you say yours just started, whereas mine has done this within a few months of being new. What actually causes it... maybe a blocked equalization valve in the battery pack?! I'll be making the annual pilgrimage over the 3 mountain passes to get my "battery check-up" from the nearest Nissan dealer in a few months - I might try asking them. Though they see so few Leafs, they might not have a clue.
Ocean Blue 2014 SL, 166,000km as of Sep 2018, 80% SOH
1 bar lost Aug 31/17 @ 54.5Ahr 83%SOH 79.72%Hx 127,413km
Commuting 142km round-trip; level 2 at home, level 1 at work
http://kootenayEVfamily.ca

arnis
Posts: 962
Joined: Sat Jan 23, 2016 3:21 pm
Delivery Date: 23 Jul 2014
Leaf Number: 015896
Location: Estonia, Europe

Re: clunk from battery area after climbing 2000ft (600m)

Sun Mar 05, 2017 3:52 am

If this noise happens when climbing a hill then most likely it is the battery case expanding.
Absolutely safe. Actually a good sign that case is waterproof :)
The fact that batter heats up also helps with getting more pressure in the pack.
And going up the hill helps lower the outside air pressure.
Most likely the clunk happens again later on when the pack cools down when parked or you drive down the hill.

I suspect battery case was designed not to clunk but it appears your does. It's like squeaking bed or floor :lol:

Don't worry, your battery will not do that
https://www.youtube.com/watch?v=Zz95_VvTxZM
Short range EVs <30kWh -- Medium range: 30-60kWh -- Long range: >60kWh
Charging: Trickle <3kW -- Normal 3-22kW -- Fast 50-100kW -- Supercharging >100kW

Electryic
Posts: 19
Joined: Sat Jul 04, 2015 7:11 am
Delivery Date: 04 Jul 2015

Re: clunk from battery area after climbing 2000ft (600m)

Fri Mar 10, 2017 9:41 pm

Sounds like a safety component in the emergency brake is releasing, possibly from no longer travelling uphill. I've heard that same noise a few times when I tried to take off too quickly after starting the car and releasing the emergency brake, where the brake didn't release and I had to accelerate a little which then released the brake. It only happened once or twice before I learned to not try to take off so quickly, but it was almost the same sound. Maybe once the car detects that you are no longer going up a slope, something gets released, which is why you are hearing it once you have arrived in town (i.e. no longer going up a long hill)

InTheMountains
Posts: 1
Joined: Tue Aug 20, 2019 12:17 pm
Delivery Date: 20 Aug 2019
Leaf Number: 307110

Re: clunk from battery area after climbing 2000ft (600m)

Tue Aug 20, 2019 1:01 pm

I own a 2017 Nissan Leaf and we are experiencing the same clunk from the battery area when the vehicle is climbing over 2000ft ( it's approximately 2,500 ft) elevation within 16 miles (20 minutes). The clunk always happens within the same 1 mile range and happens every time we drive from Salt Lake City, UT (4,226 feet) to Summit Park, UT (6,887 feet). We first noticed it this summer (2019). There is an audible clunk and it can be felt through the passenger foot-well behind the driver's seat.

I'm planning on letting the Nissan dealership know and pointing them to this discussion forum. I will also report to https://www-odi.nhtsa.dot.gov/VehicleComplaint/

Tortoisehead77
Posts: 61
Joined: Fri Jun 14, 2019 9:59 am
Delivery Date: 31 May 2018
Leaf Number: 307925
Location: Portland, Oregon USA

Re: clunk from battery area after climbing 2000ft (600m)

Tue Aug 20, 2019 1:11 pm

Electryic wrote:
Fri Mar 10, 2017 9:41 pm
Sounds like a safety component in the emergency brake is releasing, possibly from no longer travelling uphill. I've heard that same noise a few times when I tried to take off too quickly after starting the car and releasing the emergency brake, where the brake didn't release and I had to accelerate a little which then released the brake. It only happened once or twice before I learned to not try to take off so quickly, but it was almost the same sound. Maybe once the car detects that you are no longer going up a slope, something gets released, which is why you are hearing it once you have arrived in town (i.e. no longer going up a long hill)
Same here.

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