Tesla Semi battery pack design leaks

The design of the Tesla Semi battery pack has leaked, and it reveals how Tesla fits a massive ~900 kWh pack in the truck.

Tesla unveiled the production version of its Tesla Semi class 8 electric truck and delivered the first units last month.

At an event, Tesla described an electric truck that could truly disrupt the trucking industry.

However, we noted that there were a few pieces of information that Tesla omitted from the event that could really make a significant difference in the usefulness of the truck.

The two main missing pieces of information were the battery pack capacity and the weight of the tractor. Weight determines the load capacity since total weight with load and trailer is limited to 82,000 lbs.

More recently, CEO Elon Musk released a few details that allow us to confirm that the Tesla Semi battery pack has an energy capacity of about 900 kWh.

The battery pack has never really been visible on the Tesla Semi prototypes. Frankly, that’s impressive because how do you hide almost 1 MWh pack inside a vehicle like that?

Now thanks to Tesla hacker Green the Only, we get our first look at the Tesla Semi battery pack design and other important components:

The images appear to be from the parts catalog for the Tesla Semi. It singles out the components including the battery pack.

It also confirms that the Tesla Semi battery pack is located underneath the cabin at the base of the vehicle:

That’s not unusual for Tesla vehicles as the automaker attempts to keep the center of gravity low.

However, the pack design itself is quite different from anything else we have seen before.

It appears to feature nine large modules with two different sizes. The ones in the middle appear significantly larger than the ones on the sides of the vehicle.

Top comment by Brian R

Liked by 22 people

I hope they make it easily convertible to an RV (open back panel with connectivity for a trailer with solar panels) & sell that version to other companies to customize.. there are more RVs sold in the US each yr then semi trucks; RVs won't help the environment much but people pay 300k+ for a nice RV so its doable to increase economies of scale & sell alongside semis.

View all comments

The modules are also much taller than any other Tesla battery pack, which previously only were the height of one row of battery cells plus hardware.

Now, it looks more like the Tesla’s old Model S battery modules being stacked together:

Tesla battery module on the left and Tesla-inspired Theron modules on the right

There are a lot of unanswered questions about the Tesla Semi battery. For example, we still don’t know for sure what cell Tesla is using in the truck.

It was believed that the automaker would use its own 4680 cells, but CEO Elon Musk indicated that this wouldn’t necessarily be the case.

FTC: We use income earning auto affiliate links. More.

Stay up to date with the latest content by subscribing to Electrek on Google News. You’re reading Electrek— experts who break news about Tesla, electric vehicles, and green energy, day after day. Be sure to check out our homepage for all the latest news, and follow Electrek on Twitter, Facebook, and LinkedIn to stay in the loop. Don’t know where to start? Check out our YouTube channel for the latest reviews.

Comments

Author

Avatar for Fred Lambert Fred Lambert

Fred is the Editor in Chief and Main Writer at Electrek.

You can send tips on Twitter (DMs open) or via email: fred@9to5mac.com

Through Zalkon.com, you can check out Fred’s portfolio and get monthly green stock investment ideas.