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An inside look at Tesla’s P100D battery pack: more cells, 102 kWh capacity, backwards compatibility in mind

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New details of Tesla’s mysterious P100D battery pack, which Tesla CTO JB Straubel once described as having notable changes in battery module and pack technology, and a “complete redo on the cooling architecture”, have emerged thanks to Jason Hughes’s latest project.

Hughes posted photos of a dismantled 100 kWh battery pack, which he obtained through the purchase of a salvaged Tesla P100D, that reveal an increase in the number of 18650 lithium-ion cells being packed within each battery module. Hughes also discovered a surprising increase in battery capacity beyond 100 kWh, and what appears to be a replaceable connector that allows Tesla to retrofit older vehicles with the newer battery pack.

More 18650 Battery Cells

As outlined in Hughes’s blog post, Tesla was able to fit more of its cylindrical 18650 lithium-ion battery cells into each of the 16 modules making up the P100D battery pack. It’s worth noting that Tesla has maintained a relatively similar form factor on battery packs produced for Model S and Model X vehicles since their introduction. Regardless of the vehicle’s model version – be it a P85, a 60, 75D, or 90D – the uniform skateboard design of the battery pack allows for ease of production, as Tesla can manufacture a single-style pack that can be installed across its fleet of vehicles. Under that same notion, Tesla has also been able to create ‘unlockable features’ by software limiting vehicle range depending on the option purchased by the customer. In other words, Tesla installs the same battery pack into like-kind vehicles (e.g. Model S 60 uses the same pack as Model S 75).

Tesla P85 battery pack module vs. P100D module [Credit: Jason Hughes via @wk057]

Hughes’s dissection of the P100D battery shows that Tesla leveraged the same design concept by distributing a total of 8,256 battery cells across the 16 modules making up the battery pack, bringing total capacity up to the advertised 100 kWh number. However, and much to Hughes’s surprise – he had previously criticized Tesla for providing less battery capacity than what’s perceived by way of the vehicle’s nameplate – Tesla actually provided 102.4 kWh of capacity on the P100D pack, representing a 2.4% increase over what’s marketed.

Backwards Compatible Design

Tesla has also, seemingly, taken into account the ability to retrofit new battery packs onto older vehicles by using the same high and low-voltage connectors across packs. According to Hughes, “the pack itself has the same high-voltage connection, the same low voltages connectors, and the same cooling connector.” However, Hughes notes that there’s subtle changes on the P100D pack that would require a new part in order for it to be retrofittable onto non-P100D vehicles.

“The [P100D] pack has the newer ring around the high-voltage connector. So, it’s plug-and-play (for the most part, firmware and config changes needed) on the Model X and refreshed Model S, however it would require a different spacer ring on the high voltage connector. Tesla even has a part number for it, so it should be pretty simple to put into any Model S/X.” says Hughes.

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What about that new P100D battery cooling architecture?

Well. It’s not magic. Tesla did improve battery cooling in the new P100D 100 kWh battery pack. And Tesla did provide a redone architecture, but it isn’t one of mythical proportions.

Hughes reveals Tesla’s approach to improve battery pack cooling was to use shorter and thinner cooling loops per battery module, thereby improving the rate of heat dissipation. Unlike most other electric car makers who do not “prime” their vehicle’s batteries through the use of a thermal management system, Tesla pumps fluid through the battery module to regulate the temperature of its battery pack in order to bring them to optimal operating temperatures. By ensuring the lithium-ion cells operate within ideal temperatures, Tesla is able to provide the best performance possible, while ensuring cell longevity.

Tesla P100D battery module cooling loops [Credit: Jason Hughes]

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Tesla just teased something crazy with the next Full Self-Driving update

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Credit: Tesla Europe & Middle East | X

Tesla just teased something crazy with the next Full Self-Driving update, which will be released to Early Access Program (EAP) members today.

Tesla just recently released the v14 Full Self-Driving update, and it followed up just a few days later with v14.1.1.

The subsequent release helped refine a handful of things, especially an issue with stuttering at intersections and overall indecisiveness, but it was more of a smoothing over of the initial v14.1 Full Self-Driving release.

However, on Wednesday evening, Tesla’s Head of AI, Ashok Elluswamy, said that the company would be releasing v14.1.2 to EAP members today, and that it would “debut a much-awaited feature.”

He followed that up with a racecar emoji and a smoke emoji, potentially hinting toward something speed-related. However, it could mean something totally different.

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Some suggested it was potentially a new Speed Profile that could rank above the “Hurry” option, but that seems unnecessary. As far as other features that have been teased, one that definitely comes to mind is the “Banish” feature that was recently teased by CEO Elon Musk.

Banish is essentially the finishing touch to Tesla’s Actually Smart Summon (ASS), which launched earlier this year.

While ASS will bring your car to your location using the Tesla app on your phone, Banish does just the opposite by dropping you off at the door of your destination and finding a parking spot on its own.

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Elon Musk teases ‘Banish’ feature to pair perfectly with Summon

This was recently teased by Musk yet again, as he said earlier this month that Full Self-Driving would be capable of it very soon.

Based on what we’ve seen out of v14.1 and v14.1.1, there is some potential that Banish could be released and could be the feature that Elluswamy is hinting toward, although there is no direct evidence of that.

Luckily, I was able to get into the EAP, so as the feature is released and the Release Notes are available, we’ll be able to report on exactly what feature is on the way.

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Tesla benefits from new incentive program that’s active after tax credit loss

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(Credit: Tesla)

Tesla benefits from an incentive program in Texas that has become active following the loss of the $7,500 EV tax credit, which was a significant advantage for EV drivers.

In Texas, the State Commission on Environmental Quality has a grant program for light-duty motor vehicles that are either purchased or leased by consumers.

Referred to as the Light-Duty Motor Vehicle Purchase or Lease Incentive Program (LDPLIP), the program opened on October 13 and provides grants for consumers who want to buy new energy vehicles.

Will Tesla thrive without the EV tax credit? Five reasons why they might

The program allows for grants of up to $2,500 for electric or hydrogen fuel cell vehicles.

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These are the eligibility criteria:

  • Individuals or entities who purchase or lease an eligible vehicle on or after September 1, 2025, and who apply for or acquire title and registration of the vehicle in Texas
  • Applicants must have taken possession of the vehicle before applying
  • Applicants must commit to operating and registering the vehicle in Texas for at least one year

Additionally, the car must:

  • Be included on the TCEQ Eligible Vehicle List
  • Be new and must not have been the subject of any prior retail sale or lease
  • Have a gross vehicle weight rating of 10,000 pounds or less

They are awarded on a first-come, first-served basis.

The good news is that Tesla’s entire vehicle lineup, as of October 7, qualifies. Here is what the LDPLIP’s list of qualifying vehicles shows for Tesla:

  • Tesla Cybertruck AWD
  • Tesla Cybertruck Beast
  • Tesla Model S AWD
  • Tesla Model S Plaid
  • Tesla Model X AWD
  • Tesla Model X Plaid
  • Tesla Model Y Long Range RWD
  • Tesla Model Y Long Range AWD
  • Tesla Model Y Performance
  • Tesla Model 3 Long Range RWD
  • Tesla Model 3 Long Range AWD
  • Tesla Model 3 Performance

This list was published during the day of October 7, which is coincidentally the same day Tesla launched its Tesla Model 3 ‘Standard’ and Tesla Model Y ‘Standard.’

We reached out to the program to confirm that these vehicles qualify for that grant, and we will update when we hear back.

With the loss of the Federal EV Tax Credit, local programs are still available to help with the cost of an EV. Although electric cars are affordable, there are benefits to choosing one, especially as these grant programs continue to become available.

The full list of vehicles that qualify for the grant is available here.

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Tesla’s pay package saga with Elon Musk enters its final chapter

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tesla elon musk

Tesla has made a last-ditch effort to secure the $56 billion pay package for CEO Elon Musk, which was approved twice by company shareholders, after a Delaware Chancery Court denied the frontman the payday.

Perhaps one of the biggest issues from a standpoint of being fluent in Tesla-related events has been Musk’s pay package.

It was approved by shareholders once in 2018, and required Musk to oversee various growth tranches that would bring investors value. He completed each of the tranches and was entitled to the pay package.

However, the Delaware Chancery Court decided in January 2024 to rescind the pay package, which Musk had earned, based on a suit filed by a shareholder.

Chancellor Kathaleen McCormick ruled that Tesla’s board lacked independence from Musk when the pay package was approved in 2018, and that it should not be granted.

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She called it “an unfathomable sum.”

In response to the pay package’s rejection by Chancellor McCormick, Tesla held a second shareholder vote last year, which once again showed investors were willing to support Musk’s payday. It was approved by shareholders, but it was once again denied by the court.

Today, Tesla attorneys argued to the Delaware Supreme Court that the pay package should be restored because of last year’s vote by shareholders.

Jeffrey Wall, an attorney for Tesla, said (via Reuters):

“This was the most informed stockholder vote in Delaware history. Reaffirming that would resolve this case. Shareholders in 2024 knew exactly what they were voting.”

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In a response to the decision by the Delaware courts last year, Tesla proposed a new pay package for Musk in September, which would give him a potentially $1 trillion compensation plan. It would require Musk to help Tesla reach several performance-based growth milestones, including achieving an $8.5 trillion market cap.

Elon Musk’s new pay plan ties trillionaire status to Tesla’s $8.5 trillion valuation

Musk is currently worth $483 billion, making him the richest person in the world. If he were to achieve his pay package tranches, granted the new pay package is passed at the Shareholder Meeting in November, he would easily be the first trillionaire.

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