Y Ron Li

GOOD NEWS 🚨 TESLA HAS COMPLETED THE UNBOXED MANUFACTURING PUZZLE WITH A NEW OXIDE-CRUSHING CONNECTOR 🏗️ While the industry fixates on massive Giga Castings and structural battery packs, the true enablers of Tesla’s manufacturing revolution are often found in the microscopic details. For years, a quiet bottleneck has threatened to slow down the company’s ambitious "Unboxed" assembly process: the simple, stubborn problem of bolting aluminum together. With the release of Patent WO 2025/184036, Tesla has finally revealed its solution. It is a deceptively simple, washer-like device that eliminates the need for hazardous plating and messy chemical sealants. By engineering a connector that mechanically "bites" through corrosion to seal itself, Tesla has unlocked the ability to assemble high-voltage powertrains using raw, unplated aluminum—a breakthrough that radically simplifies the supply chain and serves as a cornerstone for the rapid, modular assembly techniques defining the company's future. ⚖️ The problem: The hidden battle against oxidation To understand why this patent matters, you have to look at the chemistry of the factory floor. Aluminum is the holy grail for modern EVs—lightweight and highly conductive—but it has a fatal flaw: it rusts instantly. The moment raw aluminum touches air, it forms a hard, resistive oxide layer that blocks electrical current. For decades, the auto industry’s workaround has been messy and expensive. Manufacturers have to electroplate busbars with nickel or tin, then manually or robotically apply messy dielectric greases or paints to keep corrosion at bay. In a traditional factory, this is manageable. But for Tesla’s "Unboxed" process—where modules need to be snapped together by high-speed robots in seconds—waiting for paste to cure or managing toxic plating baths is a non-starter. Tesla needed a "dry", instant connection that worked every single time. Their answer was to stop fighting the oxide layer chemically, and instead, crush it mechanically. 🔗 Tesla's solution: Enter the "biting" connector The solution described in the patent is a masterclass in functional density. At first glance, it looks like a standard gasket, but it is actually a composite tool designed to perform two violent actions simultaneously. The device consists of a hard, conductive metal ring completely encased within a soft, insulating silicone shell. The geometry is tuned to ensure a perfect sequence of events. The insulating ring is designed to be slightly taller than the conductive metal ring, ensuring that the seal begins to form before electrical contact is made. As the bolt tightens, the outer silicone compresses to create an airtight barrier. Simultaneously, the inner metal ring is engineered to be harder than the aluminum busbars. Under the crushing force of the bolt, this ring breaks through its own rubber casing and "bites" directly into the busbars, indenting the metal by anywhere from 1 to 500 microns. This bite slices right through the troublesome oxide layer, establishing a pristine, metal-to-metal electrical connection in a fraction of a second. No plating, no grease, no waiting. ⚡ The core: High-strength copper alloys This design wouldn't work with off-the-shelf materials. Standard copper is too soft to penetrate the aluminum consistently, so the patent reveals that Tesla turned to high-strength metallurgy to make the concept viable. The inner ring is forged from specific Copper-Zirconium or Copper-Chromium alloys. These materials are chosen for a precise "Goldilocks" set of properties: they possess a tensile strength of at least 400 MPa to survive the crushing force, and an electrical conductivity of over 60% IACS to handle the massive currents of a Cybertruck or Semi. Crucially, they have a softening temperature above 400°C, ensuring the ring doesn't lose its "grip" even when the battery pack gets incredibly hot. To further enhance longevity, the patent notes a critical detail: the alloy wire itself can be coated with a thin layer of nickel. Unlike the expensive and wasteful process of plating an entire busbar, plating just this tiny wire prevents the formation of brittle copper-aluminum intermetallics at the microscopic contact points. This ensures the electrical bond remains stable and conductive over the vehicle's entire lifespan. 🛡️ The shield: High-elongation silicone Surrounding this metallic core is a high-performance silicone or fluorocarbon elastomer designed with an elongation at break of at least 200%. This extreme flexibility allows the seal to deform massively without failing, ensuring it fills every microscopic gap between the busbars. As it compresses, it creates a hermetic seal that completely blocks out oxygen, moisture, and road salt. This protective capability is engineered for extreme thermal endurance. The patent specifies that the material maintains its critical elasticity across a wide operating window, functioning reliably from frigid temperatures as low as -50°C up to blistering highs of 150°C, ensuring the seal holds during rapid supercharging or cold winter starts. 🧩 Designed for the robot age The patent also highlights how deeply Tesla’s engineers thought about the practical frustrations of the assembly line. Recognizing that dropped parts can stop a production line cold—especially when busbars are oriented vertically—they integrated clever retention mechanisms directly into the device. The document details versions equipped with Pressure Sensitive Adhesives (PSA) or molded mechanical clips. These features allow robots to firmly stick or snap the connector onto a busbar before bolting, ensuring perfect alignment and preventing parts from falling into the battery pack during high-speed production. They also solved for structural weakness in lightweight components. For thinner aluminum busbars that might warp under the point-load of a single large bolt, Tesla designed elongated, oval-shaped variants. These allow the connector to surround multiple bolts simultaneously, distributing the clamping load across a wider surface area while maintaining the same "biting" electrical contact. 🚀 Why this changes everything This patent is the technical receipt for Tesla’s manufacturing ambitions. It is a critical enabler for the "Unboxed" process, which relies on building separate sub-assemblies in parallel and snapping them together in a final, automated step. By removing "wet" processes like applying sealant paints, this device enables the blistering assembly speeds required for the Robotaxi and next-generation affordable models. Beyond assembly speed, this innovation unlocks the full potential of Tesla's transition to 48V and 800V architectures seen in the Cybertruck and Semi. These high-power systems demand lightweight, highly conductive materials. By solving the reliability risks of aluminum oxidation, Tesla can replace heavy copper wiring harnesses with lightweight, unplated aluminum busbars across the entire vehicle without fear of voltage drops or galvanic corrosion. Financially, this technology radically de-risks the supply chain. By validating a way to use raw, unplated aluminum, Tesla can decouple its supply chain from specialized plating vendors, allowing them to source and machine aluminum locally at any Gigafactory—from Texas to Berlin to Shanghai—eliminating the CAPEX and environmental compliance costs associated with toxic plating baths. Finally, it supports the sustainability goals of Master Plan Part 3. Because the connection is mechanical rather than chemical, it is fully reversible. At the end of the vehicle’s life, the busbars can be unbolted and separated. This facilitates the recycling of pure, uncontaminated aluminum scrap, closing the loop on battery materials without the impurities introduced by plating metals or brazing alloys.

Here's a quick litmus test for separating tourist takes on Chinese manufacturing from writing by people who've actually worked in it: measure the Shenzhen-content. Shenzhen is one node in Chinese manufacturing. Not even the biggest one. Unitree, the robotics company everyone's watching, is in Hangzhou. Xiaomi — phones, EVs, appliances — is in Beijing. NIO is Shanghai/Hefei, Li Auto is Beijing, XPeng is Guangzhou. Huaqin, the ODM king that builds more phones than almost anyone on earth, is in Shanghai. CATL is in Ningde. BOE is in Beijing. SMIC is in Shanghai. Of that entire list, only BYD calls Shenzhen home. If your whole mental model of Chinese manufacturing is "Shenzhen = 48-hour injection molding," you're describing Huaqiangbei circa 2012, not the industrial system that actually exists today. As a Chinese blogger once put it: "Ah, Silicon Valley! Home of Microsoft and IBM!"

Every hardware engineer at OpenAI is not only embarrassed by Tan and Liu, but concerned about future employers questioning their own integrity. There could be 2000 from Apple who interviewed; 800 got offers and only these 400 said “Yes” after the highly unusual interview.

BREAKING: Apple reportedly sues OpenAI, alleging it unlawfully used confidential trade secrets.

Of course the Chinese use soy sauce--they invented it But the term soy sauce did come from the Japanese word shōyu (醤油) via Dutch VOC traders who adapted it as Soije Moreover, the sauce was named in English first & the soybean got its name from the sauce!

Every hardware engineer at OpenAI is not only embarrassed by Tan and Liu, but concerned about future employers questioning their own integrity. There could be 2000 from Apple who interviewed; 800 got offers and only these 400 said “Yes” after the highly unusual interview.

The Apple lawsuit against OpenAI is the most aggressive and intense I've seen since Waymo/Uber. Apple is saying OpenAI has been trying to rip them off cold and the whole OAI hardware drive is built on Apple IP This is a way bigger deal to OpenAI than the Elon lawsuit was IMO

There it is. Xiaomi's new brand for its first large EREV SUV codenamed Kunlun N3 set to debut later this year.

I never expected sentry mode to record something like this. Such a cute moment. 🥹

【アジア安全保障会議】 ヘグセス長官の演説後、異例の直接質問で言質を取りに行く漢小泉 小泉防衛大臣 「一部の国は米国のアジア関与を過小評価している」 「緊張が高まれば、我々の間に楔を打ち込もうとする者が現れる」 「私は米国の関与は揺るがないと感じているが、私の理解は正しいか」