Tesla’s is on a mission to make low-cost, logn-life batteries, and its cutting-edge battery technology has been pushing the EV market during the last few years.
Elon Musk recently said (Aug. 2020) Tesla could build batteries with 50% more energy density in as few as three years.
Tesla's Battery Day is scheduled for September 22, 2020. Attendance will be limited and the event will be live streamed.
Pictures of Batteries
Blog posts related to Batteries
The Tesla Model S Plaid comes equipped with a tri-motor powertrain, 200 mph of top speed, over 520 miles of range, and able to go from 0 to 60 mph in less than 2 seconds. Available to pre-order since Sep. 22nd. Deliveries to start in late 2021. Starting at $139,990.
Tesla Battery Day is planned for September 22, 2020. The event will host a limited number of persons in Fremont, California, and it will also be live-streamed to the public. Here's when and where to watch the Battery Day live-streaming online.
In this guest blog post by Ramin, the creator of the Stats app for Tesla, uses real data to throw some light to common Tesla battery degradation questions. TL;DR: There is nothing to be worried about in the vast majority of cases.
Videos about Batteries
Past Tesletter articles
Yaro_S, a reddit user that rebuilds Teslas, took these pictures of the battery of a Model 3 that hit a pole at 60mph. By now, we all know that Teslas are less likely to catch fire than normal ICE vehicles, but even more so the Model 3, according to Yaro_S. “None of the cells combusted. There is one that looks like it got to a very hot temperature and started to melt but did not burn.” I find that remarkable, given the damage shown in the picture.
Read more: RedditFrom issue #71
Jason Hughes discovered some interesting bits buried inside the Tesla BMS firmware. Tesla has made changes to fit 108 cell groups and there is a ‘packid’ that states that the pack can be ~109 kWh.
Potentially, these changes come from removing the modules that as Elon stated, make an enclosure, in an enclosure, in an enclosure, and get back some space.
Read more: TwitterFrom issue #99
Another great teardown by Munro Live. Take a look if you’re intrigued by the insides of your car.From issue #290
According to some research from Electek on the Battery Day landing page, it appears that Tesla is teasing some sort of nanotechnology ahead of the event next month. Electrek has changed the contrast and exposure for a clearer look at the lines in the background image, and a reverse Google search on the image shows that it is similar to silicon nanowires, a nanostructure that has been used to create batteries with higher performance though it has yet to be commercialized. Who else is excited for Battery Day? ☝️From issue #126
Battery Day is scheduled for next Tuesday, Sep. 22nd. What ‘many exciting things’ do you think Elon is referring to in this tweet? I’m so bummed I didn’t get an invite… but still excited. For when the time comes, you will find the live stream here. Of course, Elon or Tesla employees, if you want to give me an invite you can just reply to this email 😜From issue #129
Interested in real-world data to determine the impact of the temperature in battery degradation? This is your video. As you will see, the improvements introduced in the Model Y 2020 are great and battery degradation in this car is even less than in previous Model 3 models. Shoutout to @teslagong and @kkvr2823 for this new YouTube series.From issue #137
Tesla did not disappoint. Plans are aggressive, but realistic IMO. A good and short summary from The Verge: “The company’s moves toward eliminating cobalt in its batteries, a new Plaid powertrain for the Model S that could get to speeds of 200 mph, and a new cathode plant to streamline its battery production. And, with the new battery technology, Musk has said Tesla will make a $25,000 car.” Very proud to be a stockholder!From issue #130
In this video, he compares his 6% drop to another Model 3 with similar mileage, but less frequent DC fast charging and found out that those lost only 4% of the initial capacity.
See more: YouTubeFrom issue #117
Electrek obtained the first picture of one of the very first structural battery packs ever produced by Tesla. The pack has a honeycomb structure, which is known for its strength while also being lightweight.From issue #147
According to Twitter user @bburnworth, Tesla has been making the 4680 cells for many months and now they are ramping up prototype production of Model Ys with 4680 Tech. This prototyping will allow Tesla to refine the equipment and methods to hit the ground running fast in Berlin in early 2021!From issue #142
Germany has recently announced they’re planning on forcing petrol stations to provide electric car charging as well. They are committed to making the EV numbers go up and they are starting by trying to reduce range anxietyanxiety- they have identified that 97% of the reason why people aren’t buying electric cars is range anxiety. Germany is also planning on investing 2.5 billion euros on battery cell production and charging infrastructure.
Read more: ReutersFrom issue #115
Can you leave your car unplugged for a month? The article mentions a video from TeslaJoy. In the video, Joy lost only 15% of its SoC when parked straight for 32 days without Sentry Mode but with Cabin Overheat Protection on, although given the temperature in LA in December, it probably didn’t trigger.From issue #198
It’s unclear what this hidden section is, maybe they extended the referral program to give folks credit to expend on Tesla services, maybe something else.
Read more: RedditFrom issue #93
- Colder battery = less regen, power and slower charge
- Lower SOC = faster charge / better regen if cold
- High SOC = less regen / charge speed even with a warm battery
- Charging to 80% vs. 90% daily might be worth it just for the slight regen increase at lower temperatures
Last week, a few articles spread FUD about EVs and how unsuitable they are if they are stranded on a freeway in the winter. This owner ran an experiment, and in their result, their Model X used 2.4% of battery per hour, which means that the Model S can run Camp Mode for 24 hours and consume 58% of its range, pretty good if you ask me, especially if you think that newer models are more efficient in cold conditions.From issue #198
Sean Mitchell did a terrific interview to Ravindra Kempaiah. This almost two hour long interview covers topics from how to make batteries to the process of manufacturing battery cells. The interview is full of interesting material but if you are interested in a particular part of the process, Sean did the amazing job of including titles and links to the different sections of this video in the description. Thanks Sean for the great content and for making it easy to browse!#62
Great in-depth explanation about what was the technology that Maxwell was working on and how Tesla could use it to revolutionize batteries.
Read more: TeslaFrom issue #96
In reply to @teslavibes on Twitter, where the user was inquiring about warnings for the 12 V battery when it’s about to die, Elon Musk has shared that software improvements to actually extend its life and other improvements- unclear what those are- are coming soon. The 12V battery is one of the most common failures for Tesla’s, especially for early Model S and Model X.From issue #129
The future of energy is distributed and works via solar panels and batteries in many homes. Now, with this initiative from Tesla, you can help the grid when it is in critical need of additional power: “Opt-in to the Tesla Virtual Power Plant (VPP), and Tesla will dispatch your Powerwall when the grid needs support while continuing to maintain your energy security.”From issue #173
Both Model S have over 100,000 miles in the odometer and their battery degradation is only 3-4% in the case of the 70D and around 8% in the case of the P85+. Not bad! The video compares these two ‘vintage’ models in terms of how well they’ve aged.
Read more: InsideEVsFrom issue #115
With the battery at 9% it was pulling over 200 kW but went down fast and it kept at 80kW when the battery was at 50%. The Twitter speculation says that Tesla is testing where the limits of the 4680 are and, as they understand more, they will unlock faster charging via software.From issue #220
Or so has shared Elon on Twitter. Pretty cool to see all the battery innovation arriving to the production lines already. I wonder what’s going to happen in Freemont and the new models being delivered in the US west coast. 🤔From issue #164
Tons of pictures of a Standard Range Made in Austin. The new Standard Range should have an approximate range of 270 miles. For comparison, the previous Standard Range, not with 4680s, had a range of 230 miles. I wonder if this means that a future Long-Range with 4680s can be above 400 miles of range.From issue #211
One huge challenge for many electric vehicle drivers is home charging. Where will the vehicle charge? How fast will it charge? NeoCharge’s Smart Splitters make adding an EV charger to your home easier and more affordable. They currently have two offerings available:
- One version uses a common electrical appliance outlet to power an appliance and an electric vehicle charger
- The other version allows to power two EV chargers from a single outlet
Use promo code TESLETTER for $30 off a NeoCharge Smart Splitter.From issue #127
According to the discussion on reddit.com/r/TeslaMotors, the recently refreshed Tesla Model 3 is equipped with more energy-dense battery cells (by several percent) and a total capacity of 82 kWh. The new pack would be roughly 3 kWh or 3.8% more energy-dense and apply to the Long Range version only. One would assume the same improvements will come to the Model Y LR as well.From issue #137
Greentheonly discovered a few bits pointing to new hardware coming to the Model S and the Model X imminently:
- Two new battery types in several configs, no word about the capacity yet
- Integrated inductive phone charger (Qi)
- New charge port type
- New suspension version, not a new suspension but an iteration in the one released a few months ago
- New lumbar support, maybe new seats?
- Is there an interior redesign coming? Who knows 🤷♀️ But it seems that the S and the X are getting some love for sure!
Read more: TwitterFrom issue #96
wk057’s investigation into the Tesla firmware revealed these as the actual pack sizes:
|Original 60||~61 kWh||~58.5 kWh|
|85/P85/85D/P85D||~81.5 kWh||~77.5 kWh|
|90D/P90D||~85.8 kWh||~81.8 kWh|
|Original 70||~71.2 kWh||~68.8 kWh|
|75/75D||~75 kWh||~72.6 kWh|
|Software limited 60/60D||~62.4 kWh|
|Software limited 70/70D||~65.9 kWh|
Read more: TMC ForumFrom issue #8
Panasonic is going to be making higher-capacity batteries with lower costs at the Giga 1 in Nevada. They are going to be adding a 14th production line earlier next year, after some construction work in the next couple of months. I’m sure we’ll know more in less than a week at Battery Day, one of the strongest rumors is that there’s going to be new battery tech coming for the Model S and the Model X.From issue #129
Some info about the refreshed Model X Long Range, which seems will be lighter and more powerful than the 2020 version:
- 14% reduction in battery weight
- 13% increase in battery specific energy
- Power increased by more than 30%, equipped AC magnetic motors both front & rear
- 4% reduction in curve weight
In this video, Sandy gives his thoughts on Tesla’s newly announced 4680 batteries as well as the newly announced front mega casting and structural battery tray. He also mocks up about 1/4 of the current Model Y battery tray with similar sized dummy 4680 batteries.From issue #131
Sandy Munro recently recreated what he believes will be Tesla’s new 4680 Battery Pack and, in this video, he reveals the mockup and explains how the current flows through the pack. He admits that this may not be exactly what Tesla will use in its future vehicles but it could be very similar.From issue #139
In version 2022.36.2, the car has a battery section in the service mode. In the new screens, you can see multiple things, including the battery health and you can run a battery health test. For the battery health test, the car will discharge the battery and then charge it to full.From issue #237
Jason Hughes, a famous Tesla tinkerer, shared his solar batteries recycled from Tesla Model S modules. They have the equivalent cycles of driving ~250k miles and show degradation of 5.2%, with 3% of it happening in the first 2 years. Pretty good if you ask me! Note, the photo is sideways.From issue #172
Twitter user @theXential explains how he recalibrated his battery, making the projected range go from 257 mi to 280 mi. Clearly, this is only the displayed number, the capacity of the battery stays the same, but if you are one of the people who care about it, follow the steps in the Twitter thread.From issue #174
This Spanish taxi driver has shared his honest experience after a year driving a Tesla Model 3 for work. The videos are in Spanish, so here’s a quick summary:
- Saved 10k euros after 1 year and 100km/62 mi
- Charging/Gas cost: 0.5€-1€/100km vs. 12-13€/100km 115cv Diesel
- Purchase cost: 48k euros (including tax deduction) vs. 20.000€
- Battery degradation after 100 km: 3-4% (degradation happened mostly between 30,000 and 60,000 km)
- Only maintenance was changing the tires
- Only con is that not everyone figures out how to open the doors
- Why Tesla (instead of other EV): Range/ charging infrastructure and easier to homologate as a taxi
I love all these manufacturing videos, thank you Trev!From issue #211
Tesla drivers driving Uber can now link their cars to the Uber app, introducing a feature that assigns rides based on the vehicle’s remaining battery range. This integration aims to prevent drivers from receiving trips they wouldn’t be able to complete without a charging stop. To enable this, drivers must connect their Tesla to the Uber app and agree to share their battery level.From issue #269
Ramin from @StatsTeslaApp has written this article about battery degradation backed with real usage data collected from his Tesla Stats App. He frequently gets questions like “My Tesla is only x months old and I am concerned about losing y% of range during this short period of time” and “If this rate of range loss continues, my range will be half of what it is now very quickly”, so he wanted to share what’s really going on after looking at the data.
Thank you, Ramin, for sharing your insights!
Read more: TesletterFrom issue #102
The creator of the Stats App has written an article about battery longevity, here are some interesting bits:
- The degradation is typically more pronounced when the car is new and it levels off as the car gets older
- Battery capacity measurement is inherently noisy
- Fluctuations in max rated range are normal
Read more: MediumFrom issue #93
Big news on the battery longevity front. A research partner has released a new paper on a battery cell that could last over one million miles. Elon has stated in the past that the drive unit is designed, tested, and validated for one million miles of operation but that they may need to replace some modules of the battery pack to get to that since it should last between 300,00 and 500,00 miles. Jeff Dahn - the lead researcher and someone that we featured in the past - and his team have been extensively testing these cells and they think - based on the results - that a new type of battery could power an electric car for over 1.6 million kilometers or 1 million miles.
Read more: ElectrekFrom issue #76
Tesla begins offering Model 3 SR+ reservation holders in North America the option to switch to LFP battery
If you were waiting for an SR+ and you don’t mind the change, the range of the battery is a bit lower but in theory, you can charge to 100% without degradation, you can now switch to one of these. Take a look!From issue #179
A lot of people make arguments about how dirty EVs are because batteries and their chemicals end up in landfills. In Tesla’s 2020 Impact Report, the company states that 100% of its scrapped batteries are recycled, and 0% end up in landfills. Great to see this!From issue #177
Tesla is expected to start producing Model Y and Semis in 2020. With that, plus Model 3s and a bump on Tesla energy, they’re going to need all the batteries they can produce. If this is true, GF1 will be going from 35 GWh to 54 GWh, which is a lot.
Read more: ElectrekFrom issue #92
Tesla’s Gigafactory in Nevada is currently only 30% and is already a 1.9-million-square-foot building with 5.3 million square feet of operating space on three floors. Tesla currently produces there as many batteries as the rest of the world production combined and this is key to achieve Tesla’s mission to accelerate the world’s transition to a sustainable energy and transport system. Here is an interesting interview with their VP of of Operations at the Tesla Gigafactory.
Read more: EvannexFrom issue #66
Tesla has configured the Model S Plaid battery pack for speed — Sandy Munro’s teardown reveals deep insights
In the analysis, Munro placed the Model S Plaid and Model Y battery packs side-by-side to explain the differences and comparisons between both. This article does a great summary of what Sandy found in the Plaid’s battery pack, which unsurprisingly has been built to deliver a lot of power at once.From issue #223
Previously, Tesla’s software was coded in a way that the maximum battery size possible was 104kWh. Now, after an update and giving it one more bit, it can go up to 208kWh. While this doesn’t mean that Tesla is going to release a car with a battery larger than 208kWh, I think it’s more than possible that it will release one with a battery larger than 104kWh in the next months.From issue #119
In Oxnard, California, the community came together to advocate against the installation of a new fossil fuel-powered peaker plant. In its place, Tesla energy installed 142 Tesla Megapacks as a sustainable energy storage solution. Great work Oxnard’s community!From issue #195
Testing the internal resistance, rapid charging rate, and discharge capacity of Tesla Model 3 lithium ion cells (batteries) “2170” / 21700 made by Panasonic.
We know that cars always have a bit of extra juice to protect the battery but also to not leave you stranded on the road if you cut it too close, but this is usually around 5 extra miles or so. In this test in a Tesla with the LFP batteries, the ones in the standard range Model 3 and Y, the driver was able to get 35 extra miles out of their battery after the display indicated no more miles left.From issue #237
As Sandy Munro continued tearing down the Made in Texas Model Y, he keep being impressed by its engineering. One discovery the folks at Munro have made is that, according to him, the structural battery has zero repairability, which isn’t good.From issue #225
Tesla plans to introduce a new low-cost, long-life battery in its Model 3 in China later this year or early next that it expects will bring the cost of electric vehicles in line with gasoline models, and allow EV batteries to have second and third lives in the electric power grid. Tesla is not just a car company, it’s an energy company, and this is yet another great move by Tesla in that direction.
Read more: Reuters
From issue #112
The 12-volt battery has historically been one of the most problematic points for Tesla. In my case, I had to have it replaced under guarantee a year or so after I got delivery of my car. In order to correct this, Tesla is now including a 12-volt lithium battery in the refreshed Model S. Here is a teardown of the battery.From issue #189
After a recent fire in Hong Kong, Tesla is releasing an improved battery thermal management for the Model S and Model X as a precautionary measure. While fires in Teslas happen, we have to remind ourselves that a fire in a Tesla is ten times less likely to experience a fire than a gas car.
Read more: TeslaratiFrom issue #60
Tesla is shifting to cobalt-free lithium iron phosphate (LFP) batteries. The tradeoff here is less costly but also less energy-dense batteries. The Megapack is designed to require 40% less space and fewer parts than other systems on the market. Pretty amazing what Tesla is doing to innovate in the energy space!From issue #163
We’ve seen some reports about the 12 V li-Ion batteries failing when the vehicle’s main battery was at a low stage of charge. Seems that this problem is only happening with the cars that carry LFP batteries, the batteries weren’t well-calibrated and the car thought it had some energy left when it didn’t. To solve this, Tesla is raising the charging limit in those cars to 100% and is asking owners to charge it completely to calibrate the battery.From issue #206
Crossing the $100 per kWh would allow electric vehicles to reach price parity with ICE vehicles. Tesla also looks to bring its battery cell production in-house and enable rapid mass production. The plans are for these new battery cells to make it to the vehicles first, and they would allow them to achieve a longer range without using more batteries. Not sure how this project will interact with Tesla’s plans to soon release a 110 kWh battery pack with over 400 miles, we shall see.
Read more: TslatimesFrom issue #101
We like this topic- who doesn’t- and it’s not the first time that we share battery degradation data collected from Tesla vehicles. As you’ve probably realized by this point if you own one, Teslas show little battery degradation, even after high usage, and here’s a chart comparing battery degradation over time.From issue #143
Tesla has shared new details on its new battery pack assembly line at the Fremont Factory. The new assembly line allows Tesla to mass-produce its new 4680 cells, which are designed to improve the performance and range of its electric vehicles.From issue #264
With the new 4680 battery cells announced at Battery Day, Tesla is going to be abandoning its famous battery skateboard design. This article provides a detailed explanation on what and why this change now.
Related to this, we’ve recently learned that Giga Berlin will use 4680 cells with the structural battery pack, and front and rear single piece castings (on top of a new paint system).From issue #133
When Tesla first announced their ‘structural’ pack there was a lot of chatting about if it wouldn’t be replaceable or repairable. Well, the now free-to-access service manuals confirm that (of course) it is.From issue #217
What does ‘universal’ mean? Basically, Tesla is going to update the Model 3 production lines in the US passing on the Model Y battery manufacturing improvements and eventually incorporating the Model Y heat pump in the Model 3 as well. No timelines have been shared yet.From issue #122