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Tesla's new 4680 battery was unveiled.

Tesla's recently unveiled 4680 battery has caused a lot of buzz in the world of electric vehicles.

By Sam HarryPublished about a year ago 4 min read
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Introduction

Tesla's recently unveiled 4680 battery has caused a lot of buzz in the world of electric vehicles. This new battery promises to be a game-changer in terms of energy density, cost, and performance. In this blog post, we'll take a closer look at the nature of the 4680 battery, its advantages, and its disadvantages.

Nature of the 4680 Battery:

The 4680 battery is a cylindrical battery that is 46mm in diameter and 80mm in length, hence the name "4680". It is larger than the 2170 cells currently used in Tesla's Model 3 and Model Y vehicles. The 4680 battery uses a new tabless design, which means it doesn't have the traditional metal tabs that connect the battery cells together. Instead, the cells are connected internally using a spiral-shaped tab that runs down the length of the battery. This new design allows for more efficient energy transfer and reduces the chances of the battery overheating.

Components used in this battery:

Cathode Material:

The cathode material used in the 4680 battery is nickel-cobalt-aluminum (NCA). This cathode material has a higher energy density than the previous nickel-manganese-cobalt (NMC) cathode used in Tesla's Model 3 and Model Y vehicles. NCA also has a longer lifespan and is less prone to thermal runaway, which is when a battery cell overheats and catches fire.

Anode Material:

The anode material used in the 4680 battery is made from silicon. Silicon has a higher energy density than the graphite anode used in previous Tesla batteries, allowing for greater energy storage in the same amount of space. However, silicon is also known for its instability and can cause the battery to degrade faster over time. To address this issue, Tesla has developed a coating that stabilizes the silicon and prevents it from breaking down.

Electrolyte:

The electrolyte used in the 4680 battery is a high-concentration electrolyte that contains more lithium salt than previous Tesla batteries. This allows for faster ion transfer between the anode and cathode, which improves the battery's performance and charging time. The high-concentration electrolyte also reduces the battery's internal resistance, which results in less heat generated during charging and discharging.

Separator:

The separator used in the 4680 battery is made from a ceramic material that can withstand high temperatures and prevent the battery from short-circuiting. The ceramic separator is more durable than the previous polymer separators used in Tesla's batteries, making the battery less prone to thermal runaway.

Tabless Design:

One of the most significant changes to the 4680 battery is its tabless design. Traditional batteries use metal tabs to connect the battery cells together. These tabs can limit the amount of energy that can flow between cells and can cause the battery to overheat. The 4680 battery uses a spiral-shaped tab that runs down the length of the battery, allowing for more efficient energy transfer and reducing the chances of the battery overheating.

Advantages of the 4680 Battery:

Increased Energy Density: The 4680 battery has a higher energy density than the 2170 cells, meaning it can store more energy in the same amount of space. This allows for longer driving ranges and smaller, lighter batteries.

Faster Charging: The 4680 battery can be charged faster than previous Tesla batteries. It can handle higher charging rates without overheating or degrading, making it possible to charge a Tesla vehicle from 10% to 80% in as little as 15 minutes.

Lower Costs: The 4680 battery is cheaper to produce than previous Tesla batteries because it uses less materials and is easier to manufacture. This means that Tesla can lower the cost of its vehicles and make electric vehicles more accessible to the general public.

Improved Safety: The tabless design of the 4680 battery reduces the chances of the battery overheating and catching fire. This is a significant safety improvement, as battery fires have been a concern with electric vehicles.

Disadvantages of the 4680 Battery:

New Manufacturing Process: The 4680 battery requires a new manufacturing process, which could slow down production initially. However, Tesla has already started building a pilot production line for the new battery and plans to ramp up production in the coming years.

Compatibility: The 4680 battery is not currently compatible with Tesla's existing vehicles. This means that Tesla will need to design and manufacture new vehicles that can accommodate the larger battery size.

Supply Chain Issues: Tesla may face supply chain issues in sourcing enough materials to manufacture the 4680 battery at scale. However, the company has already secured agreements with several suppliers to ensure a steady supply of materials.

Conclusion:

The 4680 battery is a significant step forward in the development of electric vehicle technology. Its increased energy density, faster charging times, lower costs, and improved safety make it an attractive option for Tesla and other electric vehicle manufacturers. While there are some challenges to overcome, Tesla has already started addressing these issues and is well on its way to mass-producing the 4680 battery. With this new battery, electric vehicles are becoming more accessible and affordable, and we can expect to see a significant increase in their adoption in the coming years.

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About the Creator

Sam Harry

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