Energy
Tesla patents custom cooling system for longer-lasting energy storage devices
A significant part of Tesla’s business relies heavily on the durability and longevity of its battery packs, and in the spirit of disruptive innovation, the Silicon Valley-based company has continued to make improvements to its battery technology to make them more durable and more efficient. Tesla was able to achieve this through several ways, one of which was discussed in a recently published patent application.
It is pertinent for battery packs, particularly those that are used for energy storage, to be robust enough that they last for a very long time. To accomplish this, battery packs must be able to handle multiple charge and discharge cycles on a regular basis. They must also be able to weather faults in the system, including those that may cause damage to the actual cells in the pack itself.
Such a system was outlined by Tesla in a patent simply titled “Energy Storage System.” Explaining its rationale, the Silicon Valley-based company stated that “cells and other components in a pack generate heat during operation, both during the charging process to store the energy and during the discharge process when energy is consumed.” Tesla further explains that “when the cells fail, they typically release hot gases. These gases may impact the integrity of other cells in the pack and may cause substantial damage to the functional cells which have not failed.”
With this in mind, Tesla maintains that there is a need to develop an “improved energy storage system” that will be capable of reducing or removing “one or more of the issues mentioned.” Tesla’s patent describes two strategies that could improve its battery packs. One of these involves the use of a novel system that utilizes a cold plate, which could help remove heat generated by the battery pack during use. Heat pipes may also be used together with a cold plate to achieve this purpose.
“In certain embodiments, a cold plate (which provides liquid cooling) may be in thermal connection with the battery cells 100 to further remove heat generated during system use. The cold plate may be in direct thermal contact with the battery cells 100 or, alternatively, one or more layers and/or features may be between the cold plate and the battery cells 100. In certain embodiments, the battery cells 100 are in contact with one or more heat pipes to remove excess heat disposed under the battery cells. A cold plate is disposed below the heat pipe or pipes (on the side of the heat pipe away from the battery cells 100) that helps dissipate the heat contained in the heat pipe.”
“In certain embodiments, the cold plate may be in thermal contact with one side of the cells without any heat pipes disposed between the cells. The cold plate may physically consist of a single plate or multiple plates that are thermally connected to the cells and/or one another. In other embodiments, one or more heat pipes are disposed between the battery cells 100 and a cold plate is disposed below the battery cells 100. The heat pipes and the cold plate may be in thermal connection with one another.”
Apart from the use of cold plates, Tesla also described a battery pack with regions that are designed to give way when mechanical failures happen. By using such a system, the majority of the cells in a battery pack become protected even if some cells were to fail.
“The top plate includes one or more weak areas above the one or more battery cell. The weak areas are regions that have less integrity and thus, where mechanical failure is more likely to occur if a battery cell releases gas. These regions may be physically weaker areas compared to the surrounding areas and may rupture when pressure builds up due to a failed cell. Alternatively, the weak areas may be chemically weaker and preferentially rupture when exposed to the caustic gases released by a failed battery cell. The weak areas may also fail due to a combination of physical and chemical weakening.”
The full text of Tesla’s Energy Storage System patent could be accessed here.
Tesla’s focus on battery integrity in its recently published patent application suggests that the Silicon Valley-based company is looking to develop packs that are capable of lasting a very long time. Such improvements have been teased before, especially in a paper released by Tesla lead battery researcher Jeff Dahn and members of the Department of Physics and Atmospheric Science at Dalhousie University. The cells described in the paper are capable of lasting over 1 million miles on the road, or 20 years if used in grid energy storage.
Looking at these initiatives, as well as the battery pack contingencies outlined in the recently released patent, it appears that Tesla is building up towards creating an ecosystem of products that are capable of lasting decades. This, of course, plays a huge part in pushing Tesla’s overall goal of accelerating the advent of sustainable energy.
Energy
Tesla Energy celebrates one decade of sustainability
Tesla Energy has gone far since its early days, and it is now becoming a progressively bigger part of the company.
Tesla Energy recently celebrated its 10th anniversary with a dedicated video showcasing several of its milestones over the past decade.
Tesla Energy has gone far since its early days, and it is now becoming a progressively bigger part of the company.
Tesla Energy Early Days
When Elon Musk launched Tesla Energy in 2015, he noted that the business is a fundamental transformation of how the world works. To start, Tesla Energy offered the Powerwall, a 7 kWh/10 kWh home battery system, and the Powerpack, a grid-capable 100 kWh battery block that is designed for scalability. A few days after the products’ launch, Musk noted that Tesla had received 38,000 reservations for the Powerwall and 2,500 reservations for the Powerpack.
Tesla Energy’s beginnings would herald its quiet growth, with the company later announcing products like the Solar Roof tile, which is yet to be ramped, and the successor to the Powerwall, the 13.5 kWh Powerwall 2. In recent years, Tesla Energy also launched its Powerwall 3 home battery and the massive Megapack, a 3.9 MWh monster of a battery unit that has become the backbone for energy storage systems across the globe.
Key Milestones
As noted by Tesla Energy in its recent video, it has now established facilities that allow the company to manufacture 20,000 units of the Megapack every year, which should help grow the 23 GWh worth of Megapacks that have already been deployed globally.
The Powerwall remains a desirable home battery as well, with more than 850,000 units installed worldwide. These translate to 12 GWh of residential entry storage delivered to date. Just like the Megapack, Tesla is also ramping its production of the Powerwall, allowing the division to grow even more.
Tesla Energy’s Role
While Tesla Energy does not catch as much headlines as the company’s electric vehicle businesses, its contributions to the company’s bottom line have been growing. In the first quarter of 2025 alone, Tesla Energy deployed 10.4 GWh of energy storage products. Powerwall deployments also crossed 1 GWh in one quarter for the first time. As per Tesla in its Q1 2025 Update Letter, the gross margin for the Energy division has improved sequentially as well.
Tesla Energy shined in what was a weak delivery report for the first quarter, as the company’s frequently-forgotten battery storage products performed extraordinarily well.
Tesla reported its Q1 production, delivery, and deployment figures for the first quarter of the year, and while many were less-than-excited about the automotive side, the Energy division performed well with 10.4 GWh of energy storage products deployed during the first quarter.
This was a 156 percent increase year-over-year and the company’s second-best quarter in terms of energy deployments to date. Only Q4 2024 was better, as 11 GWh was recorded.
Tesla Energy is frequently forgotten and not talked about enough. The company has continued to deploy massive energy storage projects across the globe, and as it recorded 31.5 GWh of deployments last year, 2025 is already looking as if it will be a record-setting year if it continues at this pace.
Tesla Megapacks to back one of Europe’s largest energy storage sites
Although Energy performed well, many investors are privy to that of the automotive division’s performance, which is where some concern lies. Tesla had a weak quarter for deliveries, missing Wall Street estimates by a considerable margin.
There are two very likely reasons as to why this happened: the first is Tesla’s switchover to the new Model Y at its production facilities across the globe. Tesla said it lost “several weeks” of production due to the updating of manufacturing lines as it rolled out a new version of its all-electric crossover.
Secondly, Tesla could be facing some pressure from pushback against the brand, which is what many analysts will say. Despite the publicity of attacks on Tesla drivers and their vehicles, as well as the company’s showrooms, it would be safe to assume that we will have a better picture painted of what the issue is in Q2 after the company reports numbers in July.
If Tesla is still struggling with lackluster delivery figures in Q2 after the Model Y is ramped and deliveries are more predictable and consistent, we could see where the argument for brand damage is legitimate. However, we are more prone to believe the Model Y, which accounts for most of Tesla’s sales, and its production ramp is likely the cause for what happened in Q1.
In what was a relatively bleak quarter, Tesla Energy still shines as the bright spot for the quarter.
Tesla has chosen the location of its latest manufacturing project, a facility that will churn out the Megapack, a large-scale energy storage system for solar energy projects. It has chosen Waller County, Texas, as the location of the new plant, according to a Commissioners Court meeting that occurred on Wednesday, March 5.
Around midday, members of the Waller County Commissioners Court approved a tax abatement agreement that will bring Tesla to its area, along with an estimated 1,500 jobs. The plant will be located at the Empire West Industrial Park in the Brookshire part of town.
Brookshire also plans to consider a tax abatement for Tesla at its meeting next Thursday.
The project will see a one million square-foot building make way for Tesla to build Megapack battery storage units, according to Covering Katy News, which first reported on the company’s intention to build a plant for its energy product.
CEO Elon Musk confirmed on the company’s Q4 2024 Earnings Call in late January that it had officially started building its third Megapack plant, but did not disclose any location:
“So, we have our second factory, which is in Shanghai, that’s starting operation, and we’re building a third factory. So, we’re trying to ramp output of the stationary battery storage as quickly as possible.”
Tesla plans third Megafactory after breaking energy records in 2024
The Megapack has been a high-demand item as more energy storage projects have started developing. Across the globe, regions are looking for ways to avert the loss of power in the event of a natural disaster or simple power outage.
This is where Megapack comes in, as it stores energy and keeps the lights on when the main grid is unable to provide electricity.
Vince Yokom of the Waller County Economic Development Partnership, commented on Tesla’s planned Megapack facility:
“I want to thank Tesla for investing in Waller County and Brookshire. This will be a state-of-the-art manufacturing facility for their Megapack product. It is a powerful battery unit that provides energy storage and support to help stabilize the grid and prevent outages.”
Tesla has had a lease on the building where it will manufacture the Megapacks since October 2021. However, it was occupied by a third-party logistics company that handled the company’s car parts.
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