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Charging rate appears to be below 1C

CyberSav

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oof you've watched a few too many Out of Spec videos lol
Sorry, not sure what this means. But I hope you enjoy to continue making excuses for Tesla and the Cybertruck's outdated and poor (by today's standards) charging performance.
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Cyberkingz

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Sorry, not sure what this means. But I hope you enjoy to continue making excuses for Tesla and the Cybertruck's outdated and poor (by today's standards) charging performance.
There's a reason why Tesla has the lowest battery warranty claims rate. If you're thinking a simple charge curve can possibly be classified as "outdated tech" that tells me where you're at haha. Its a charge curve lol.
 

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There's a reason why Tesla has the lowest battery warranty claims rate. If you're thinking a simple charge curve can possibly be classified as "outdated tech" that tells me where you're at haha. Its a charge curve lol.
It's totally okay if you don't understand the engineering behind a charge curve, man. Between your Model Y and Cybertruck, you definitely know those long wait times well though! If you're happy waiting 40 minutes at the plug, that's all that matters. Safe travels out there! 😊
 
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cybercricket

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No. My last trip had me charging twice, both 15 minutes each. For 700 miles.
I just did 1600 miles. Sometimes it seemed better than the others, but on average the charging was quite pathetic.

Your nav will keep you trip optimized, you just aren't allowing it to. You think maybe your battery health is important too?
Battery health is a factor when charging say at 3C, but what I am saying is that on average CT doesn't even charge at 1C.

And again, I understand the math there - if you only stop for 5 minutes, you can absorb at 3C for that time at the bottom of the SoC range... but it's not just the 5 minutes at the station there that matters, but also the getting off your way to get to the station in terms of time and safety.
 
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cybercricket

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Try disabling "Make Fewer Stops" in the navigation.

1780405246818-t4.webp


Here is a quote from Elon when talking to Joe Rogan, that will help visualize why charging is quicker in the lower half of the battery.

The more you charge, the longer it takes
“For a gasoline car, you would fill it up,” Musk said during a recent episode of “The Joe Rogan Experience” podcast. “For a battery, the charge state tapers off as you get above 80%.”

“I think the right analogy here is cars in a parking lot,” he continued. “The lithium ions are trying to find a parking space as they move across from one side of the battery to the other side.”

A battery at low charge is akin to an empty parking lot, Musk said — the ions can "zip right in there and find a spot.” But as the battery gets closer to full, it becomes more like a busy mall’s parking lot, where the available spots are scarce. In that situation, the ions "have to bounce around more" to find their places.

“Getting from 80 to 100 (percent) takes about as much time as getting from 0 to 80,” Musk told Rogan.
That's the standard wisdom in this context, but I'm saying that from the observation it's significantly worse both under 80% SoC and also in totality.
 


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cybercricket

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There's a reason why Tesla has the lowest battery warranty claims rate. If you're thinking a simple charge curve can possibly be classified as "outdated tech" that tells me where you're at haha. Its a charge curve lol.
The purpose of the curve is to exceed 1C rate on average. My whole point is that the current curve averages out to below 1C.
 

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Are you pre-conditioning? When I took a road trip, I was seeing over 400kW at V4 stations, albeit briefly.

The taper is expected, and is necessary for pack health. An aggressive charge curve could cut your charge time in half, but would reduce useful cycles from 2000 down to 200.

Tesla can and has modified the charge curve to be more aggressive if the fleet data indicates it is safe.
Always precondition. But I see your point. And others. I think I’m just growing impatient of waiting for this part. It’s been 5 weeks now, sitting at superchargers..
 

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This may have been discussed before, but did a longer trip in the last few days and had many opportunities to observe. Basically you pull up to a 350kW Supercharger with say 15% SoC. It pushes ~300kW until you get to say ~30%, then 200kW until ~50%, then 150kW until ~60%... above 60% it's consistently below 120kW and effectively means to get a full charge (if you wanted one) you need more than ONE HOUR (!!!!). That doesn't seem like a breakthrough in charging at all.
Unfortunately this was one of the big letdowns with the CT

Despite the 800v architecture, Tesla videos showing 500 kW charging, the charging rate is acceptable only for a short amount of time before the charge curve hammers it and slows charging.
Tesla Cybertruck Charging rate appears to be below 1C 119209-c9e114cbd4ca40a9192fc1a0260577fc


The coping mechanism for this is "it is better for battery health" but cmon I don't think anyone was expecting over an HOUR to recharge the truck with a 500+ mile range, more less the 250-280 it is getting now.
With the current charge rate with the bigger battery pack it would take about 2 hours to charge the truck if we had gotten the 500+ mile range.

So this is a double whammy unfortunately.

Another common one is "you just charge from 5%-40% when on a road trip" which comes from the crowd that has a supercharger ever 20miles and never pulls a trailer.

2 years post release the range is what it is, and a 1+ hour full charge shows no signs of changing.
 

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Imagine convincing yourself that thermal throttling to 100kW is a feature rather than outdated tech.
Imagine a world without hypothetical situations 🤔
 

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A few people here mentioned like 40 minutes to go from 10-80 or 25-80%. This is why, IMO, faster chargers (like ionna 400kW or Tesla 500kW) make a difference. It doesn‘t last long at the highest power level, but every minute you spend at say 360kW saves 3 minutes at the end when you’re at 120kW. Here’s a real charge curve at an Ionna station, starting at just under 400kW, and doing 10-76% in 28 mins.

Tesla Cybertruck Charging rate appears to be below 1C IMG_0661
 


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cybercricket

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A few people here mentioned like 40 minutes to go from 10-80 or 25-80%. This is why, IMO, faster chargers (like ionna 400kW or Tesla 500kW) make a difference. It doesn‘t last long at the highest power level, but every minute you spend at say 360kW saves 3 minutes at the end when you’re at 120kW. Here’s a real charge curve at an Ionna station, starting at just under 400kW, and doing 10-76% in 28 mins.

IMG_0661.webp
Note how it went below 120kW before even reaching ~60% SoC. CT battery is 123kWh, which means 1C charging rate (safe, sustainable charging rate for all Lithium Ion batteries) isn't ever maintained, and this charging curve overall would have resulted in sub 1C charging in the end.
 

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Note how it went below 120kW before even reaching ~60% SoC. CT battery is 123kWh, which means 1C charging rate (safe, sustainable charging rate for all Lithium Ion batteries) isn't ever maintained, and this charging curve overall would have resulted in sub 1C charging in the end.
Sounds like you're misunderstanding C-rates. Li batteries are designed to handle over 1C at low SoC that’s why they can pull 350–500 kW early on. But it's not sustainable to hold that output current rate as battery voltage increases. 1C sustained is aggressive for longevity, not a safe ceiling. Towards the end of the charge you would be forcing electrons into their "place" causing excess heat and degradation/dendrite growth. at the beginning of the charge cycle there is ample room for the electrons to move over to the other side of the battery. High power chargers are beneficial because they can really speed up the bulk phase. Charging current needs to taper down as voltage increases, that's why we call it a "curve". Your iPhone does this too.
 
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cybercricket

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Sounds like you're misunderstanding C-rates. Li batteries are designed to handle over 1C at low SoC that’s why they can pull 350–500 kW early on. But it's not sustainable to hold that output current rate as battery voltage increases. 1C sustained is aggressive for longevity, not a safe ceiling. Towards the end of the charge you would be forcing electrons into their "place" causing excess heat and degradation/dendrite growth. at the beginning of the charge cycle there is ample room for the electrons to move over to the other side of the battery. High power chargers are beneficial because they can really speed up the bulk phase. Charging current needs to taper down as voltage increases, that's why we call it a "curve". Your iPhone does this too.
Also please tell us about CC/CV, and what design considerations were put into the cells to "handle 1C at low SoC."
 

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Another common one is "you just charge from 5%-40% when on a road trip" which comes from the crowd that has a supercharger ever 20miles and never pulls a trailer.

2 years post release the range is what it is, and a 1+ hour full charge shows no signs of changing.
You sound new to EVs, based upon the number of misconceptions you hold.

I don't know anyone who targets 5-40% SOC on road trips as a general rule. The most common (for people that know what they're doing) is to target around 10% and charge to around 60-65%, while skipping most Supercharger locations.

What's with needing a Supercharger every 20 miles? That's a false narrative, even if you pulled a trailer everywhere you went.

When I drove my Dual-Motor Foundation Cybertruck from Bellingham, WA to Reno, NV and back in the middle of winter, my typical charge stop was 16-22 minutes. And I took the route less travelled, with many fewer Superchargers and skipped most of them. The truck was ready to go before I had peed and picked up a drink or snack. Of course I wasn't towing a trailer in the middle of winter, nor did I see many trailers going long distances, most of them looked like local contractors only on the rural highway for a few miles.

People are catching onto what a fine ride the Cybertruck is and delivery wait times are increasing for both new and used Cybertrucks. I wonder if that is what is increasing the desperation. Probably so. The Cybertruck is on track to solidify it's title of the best-selling electric truck in the world. And there are many good reasons why it outsells all the rest (and not many good reasons why it wouldn't outsell the rest).
 

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You sound new to EVs, based upon the number of misconceptions you hold.

I don't know anyone who targets 5-40% SOC on road trips as a general rule. The most common (for people that know what they're doing) is to target around 10% and charge to around 60-65%, while skipping most Supercharger locations.

What's with needing a Supercharger every 20 miles? That's a false narrative, even if you pulled a trailer everywhere you went.

When I drove my Dual-Motor Foundation Cybertruck from Bellingham, WA to Reno, NV and back in the middle of winter, my typical charge stop was 16-22 minutes. And I took the route less travelled, with many fewer Superchargers and skipped most of them. The truck was ready to go before I had peed and picked up a drink or snack. Of course I wasn't towing a trailer in the middle of winter, nor did I see many trailers going long distances, most of them looked like local contractors only on the rural highway for a few miles.

People are catching onto what a fine ride the Cybertruck is and delivery wait times are increasing for both new and used Cybertrucks. I wonder if that is what is increasing the desperation. Probably so. The Cybertruck is on track to solidify it's title of the best-selling electric truck in the world. And there are many good reasons why it outsells all the rest (and not many good reasons why it wouldn't outsell the rest).
No need to charge every 20 miles, but some parts of the country superchargers are 100+ miles apart, which is a real problem if towing a large load at highway speeds.

15-20min charges are also my norm on a road trip, which is A-OK for a pavement princess, but add a urander rack, trailer, etc and the charge time adds up.

CT is the best electric truck out there in my opinion. But it is a Tesla so of course it is, does not change the fact that the charging curve is pretty sad and when towing folks are going to have to sometimes sit at a supercharger for 60+mins to make it to the next one.
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