Take a Peek at Tesla’s Latest Battery Pack Design for Model 3!

Take a Peek at Tesla’s Latest Battery Pack Design for Model 3!

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Tesla has been making waves in the automotive industry with their all-electric vehicles, and their latest offering, the Model 3, is no exception. Priced at $35,000, half the cost of their flagship Model S and Model X, the Model 3 required a whole new platform and battery pack architecture to achieve affordability. However, Tesla’s ingenuity has paid off, and the Model 3 has been receiving positive reviews for its impressive features and performance.

One significant change in the Model 3 is the new battery cell format. The cells are a different size than in the Model S and Model X, with larger cells called “21 70”. This change enabled Tesla to optimize volumetric energy density. Electrek has exclusive first details on the battery pack architecture built around those new cells. The standard 50 kWh Model 3 battery pack consists of 2976 cells in groups of 31 cells per “brick”. The bricks go into four separate modules, with the pack going into production later this year.

Compared to the Model S and Model X battery pack architecture, which has several more modules per pack, the Model 3 has significant differences. Tesla did not design the Model 3 battery pack to be easily swappable, with bolts only accessible by removing trims from the car’s interior needed to eject the pack. Additionally, the Model 3 pack has no externally accessible high voltage connector other than the charge port, which eliminates the possibility of an autonomous charging access point under the vehicle.

Tesla also incorporated ingenious designs to save weight and cost, such as getting rid of the external battery pack heater and heating the pack only using heat provided by the powertrain. The automaker designed a thermal controller for the Model 3 that can use heat from the powertrain even when the vehicle is parked, ensuring that battery cells operate at optimal performance temperatures.

Furthermore, the battery pack already includes the charger, fast-charge contactors, and DC-DC converter, all in the same package. The packs also have the necessary connectors for the upcoming all-wheel-drive dual motor option. For the more inside baseball stuff, the battery pack’s main electronic components include the charge port connector, fast charge contactor assembly, coolant line to Power Conversion System (PCS), High Voltage Controller (HVC), low voltage connector to HVC from the vehicle, 12V output from PCS, positive HV power switch, coolant line to PCS, HV connector to cabin heater and compressor, cabin heater, compressor and PCS DC output fuse, HV connector to rear drive unit, HV pyro fuse, HV connector to front drive unit, negative HV power switch, and connector for 3-phase AC charging.

Overall, Tesla’s Model 3 battery pack architecture highlights their innovation, efficiency, and focus on making electric vehicles accessible to everyone.

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