I have battery cooling issue crop up in the last 2 months and been at service center since then off and on. Service center told me they couldn't pull the logs because of bad SD card. Now that it has been changed, they should have all the data they need. I am posting series of pictures that ultimately point to battery temp being high. I am not sure this is related to louvers not opening, may be it is. I let Service center know about this. I didn't get any warnings whatsoever. My AC completely broke twice 2 months ago and was replaced as well.
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Battery Cooling Issues
- Thread starter kpalaniswami
- Start date
How are you coming to that conclusion based on the IC temp display?
Technician informed during my second visit that one of the module is out of spec temp wise. But all the thermal tests are passing. He also topped off coolant.
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I start with normal supercharging rate (as shown in first picture) and see how it goes down rapidly in subsequent pictures and ends up with yellow bars when I am ready to drive after supercharging
Like @gaswalla said, need SMT to see brick temps. a) Many tesla techs seem to say the first thing that comes into their heads and b) if one brick is showing hot, that's not going to show on the IC display. What symptoms are YOU seeing regarding car performance / behavior?
edit: behavior as in other than supercharging. Is range about normal? Had the battery preheated? I guess yes to get the initial charge rate?
edit: behavior as in other than supercharging. Is range about normal? Had the battery preheated? I guess yes to get the initial charge rate?
As you see in the last few pictures in the series, yellow bar mean you are power limited. If I sit at supercharging on a hot day say until 65% SOC, my power is limited to like 40kWh on the energy graph in Instrument Panel and end up driving at no more than 30MPH until battery cools due to car motion
The average whr/mile looks way different after charging. Is that coincidence? And now I see what you are saying about louvres. But odd that IC temp is higher and power limit lower in later pics. Does it AC charge normally?
But either way, I think SMT would show you what you need to know.
But either way, I think SMT would show you what you need to know.
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All I can say is there is something going on in the Battery thermal management system or maybe a bad battery module and Service center has no clue for the past month or so. I am posting here to find out if anybody had similar issues. My range is at 270 miles for 100% SOC (after BMS recalibration of course) which is on the high side for a 70K mile car.
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I don't know if you can extract a report from the tech showing the brick / module temp? I would have thought that one module being hotter than the others would be either sensor related or cell related. But either way internal to the battery. Given the obvious odd behavior has Tesla suggested a way forwards? I am only basing comments on what I read hear. I'm sure others will have ideas.
I am losing patience and no word yet from service center. Long distance driving is quite impossible with this scenario as it takes twice as long in each supercharger location with this issue. If they give me a crap answer saying that everything is normal, I am going for arbitration.
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Update: Issue still there. (for sure, AC is working much better than before, cools faster at 95F weather better than before). Something else is going on. Going to try with Fremont Service Center. I did raise the issue with [email protected]. Haven't heard from them either. Not sure how to escalate the issue to higher authorities at Tesla. I appreciate any suggestions from fellow owners.
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New X owner, and I have somewhat similar problems.
Lead tech looked at my X in Marietta, GA. They isolated it as far as they could at end of day, and said it's an issue w/ the cooling system. Here's what he thought the next steps should be:
1. Coolant flow test - this would check for obstructions, kinks, or air bubbles in the system
2. Validate all pumps are working/connected
Previous owner said he had a similar issue about a year ago, and had the heat pump replaced, which restored proper charging. The front drive motor was also recently replaced, so I'm guessing my issue will lie somewhere in the testing or double-checking of the previous repair work.
Mine goes in for service tomorrow morning here in MN. I'll let you know what they come up with, as it sounds similar. I actually stumbled onto this thread because of mention of the louvres, which I just learned the Model X has.
Lead tech looked at my X in Marietta, GA. They isolated it as far as they could at end of day, and said it's an issue w/ the cooling system. Here's what he thought the next steps should be:
1. Coolant flow test - this would check for obstructions, kinks, or air bubbles in the system
2. Validate all pumps are working/connected
Previous owner said he had a similar issue about a year ago, and had the heat pump replaced, which restored proper charging. The front drive motor was also recently replaced, so I'm guessing my issue will lie somewhere in the testing or double-checking of the previous repair work.
Mine goes in for service tomorrow morning here in MN. I'll let you know what they come up with, as it sounds similar. I actually stumbled onto this thread because of mention of the louvres, which I just learned the Model X has.
Technician at Fremont Service center attributed the issue to bad onboard charger which was not allowing the coolant to flow properly and hence battery was over heating during super charging. At first, I was skeptical about his assessment, but he was confident, and Tesla would stand by it. Time to test again. I had to shell out another $3k for replacement. In the last 4 months, total cost for replacement has been 8K which includes AC. I would strongly recommend purchasing extended warranty.
Presumably because they figure they can milk you out of an extra $8,000 for unnecessary repairs and *then* charge you $15k for the battery.
Yes, I have ordered SMT tools (OBD link, cable and App) and will report what I find out.
