Thermal management of 4680 cells was a challenge, pouch cells a big no at Tesla, says Musk

-

-Advertisement-

In his latest tweetstorm, the vibrant and knowledgeable CEO of the Silicon Valley-based automaker Tesla (TSLA) has opened up a bit more about EV battery packs and the 4680 cells thermal management.

Musk started tweeting by answering a question about different battery pack form factors and the use of pouch cells. He said that heat propagation or more technically called thermal runaway propagation (TRP) in large pouch cells is dangerously high. This is the reason Tesla is against the use of large pouch cells in its electric vehicles.

“Probability of thermal runaway is dangerously high with large pouch cells. Tesla strongly recommends against their use,” Elon Musk tweeted.

Tesla Accessories by EVANNEX.
– Sponsored –

“So smaller, reinforced, pressure protected prismatic cells for iron based cells (LFP) are good & safe, and steel cylindrical for nickel (and iron) are the overall design sweet spot?,” Musk agreed to the theory presented in this tweet from a Twitter account Tesla Facts.

He further explained that cooling a cell with larger form factor is a challenge because the cooling loop to the center is a longer distance. This high cooling loop makes it harder to prevent hotspots (or heat spots). “Then, pressure & heat released from large cell in weak bag make it impossible to stop whole pack from burning,” Musk tweeted.

Tesla unveiled its 46mm diameter and 60mm length (4680) form factor battery cell at the 2020 Battery Day. Since this is a larger form factor cell as well, I thought I should ask Elon Musk if Tesla also had to deal with heat propagation issues with it.

Tesla's future 4680 battery cell. 6X more power, 5X more energy, and 16% more range.
Tesla’s 4680 battery cell unveiled at 2020 Battery Day. 6X more power, 5X more energy, and 16% more range. Image: Courtesy of Tesla, Inc.
– Advertisement –

However, he did not reply to our official account directly but he answered the question, “Our new cell is 46mm diameter with steel shell & even that was huge challenge for propagation resistance,” Musk said.

Taking a closer look at the Battery Day presentation, vehicle teardown expert Sandy Munro explored that Tesla has changed its battery cooling mechanism. Previously, the batteries were cooled down by placing the battery coolant tubes between the cell walls.

The newer battery packs with 4680 cells will be cooled down by placing the coolant tubes above and below the cells, the right way to dissipate battery heat. Coupled with the tab-less design that reduces the cooling loop, Tesla has found the secret sauce for optimal battery thermal management.

Musk did not respond to several questions by us and the Tesla Community, if the Giga Berlin-made Model Y will be the first one to have the new 4680 cells or the Cybertruck coming next year.

Stay tuned for constant Tesla updates, follow us on: 
Google News | Flipboard | RSS (Feedly).

Iqtidar Ali
Iqtidar Alihttp://www.teslaoracle.com
Iqtidar has been writing about Tesla, Elon Musk, and EVs for more than 3 years on XAutoWorld.com, many of his articles have been republished on CleanTechnica and InsideEVs, maintains a healthy relationship with the Tesla community across the Social Media sphere. You can reach him on Twitter @IqtidarAlii

Latest News

Study: The Current Generation of Students Is Pushing for Sustainable Electric Vehicles

Sustainability is a crucial factor directly influencing consumer choices, particularly among Gen Z students. Within the auto market, younger...

FSD Beta v12.2.1 is coming pre-installed on new Tesla vehicles with Full Self-Driving transfers

Tesla (TSLA) started rolling out its most awaited FSD Beta release version 12 (12.2.1) earlier this week. As we...

Tesla begins wider release of FSD Beta 12.2.1 (2023.44.30.2) — it can finally take smooth U-turns (videos)

After a long wait of weeks and months, Tesla (TSLA) has finally started pushing the Full Self-Driving Beta v12...

Tesla to fix auto wiper issues with an OTA software update soon

A Tesla (TSLA) software engineer has confirmed on X (Twitter) that the automaker will soon release an over-the-air (OTA)...
- Advertisement -

Starship 28 stacked on Booster 10 for the first time in preparation for Flight 3 orbital launch test

Yesterday, Elon Musk's SpaceX moved the next candidates for Starship Flight 3 to the Orbital Launch Mount (OLM) at...

Starship Flight 3 likely to reach orbit, Elon Musk explains the reason for Flight 2 explosion and achievements of 2023

This past Friday, SpaceX CEO Elon Musk gave almost an hour-long presentation at the Starbase Rocket Garden. The vibrant...

SpaceX ends 2023 with a major Starship Flight 3 milestone — 33 engine Booster 10 static fire test

Elon Musk's commercial spaceflight and space exploration company SpaceX completed its year with a major Starship milestone. On Friday...

Tesla Tips & Tricks

Here’s how the Tesla mobile app V4.0 is different than the old version

Tesla released the newer version 4.0 of its mobile...

Tesla owner melts snow off of his car using Defrost Mode in the extreme cold weather (video)

The actual test of an electric vehicle is conducted...

Tesla adds Automatic Headlights with wipers and a ton of new features in the 2023.26 update (Release Notes)

Tesla rolled out a brand new over-the-air (OTA) software...

Tesla Quarterly Reports & Eearnings

- Advertisement -

You might also likeRELATED
Recommended for You