4680电池的大饼，马斯克不想画了

Core Viewpoint - Tesla's ambitious plans for the 4680 battery have faced significant setbacks, leading to a drastic reduction in supply contracts and raising concerns about the viability of its low-cost battery strategy [5][6][7]. Group 1: Tesla's 4680 Battery Challenges - Tesla has been working on the 4680 battery for over five years but has now quietly acknowledged difficulties, as evidenced by a supply contract with L&F being reduced from $2.9 billion to $7386, a decrease of over 99% [5][6]. - The 4680 battery was intended to be a key component in Tesla's low-cost battery and affordable vehicle plans, but its production has been inconsistent, oscillating between "suspended" and "mass production" states [6][7]. - The performance issues of the 4680 battery, particularly in energy density and charge/discharge capabilities, have hindered the rollout of models like the Model Y, which was initially intended to utilize this technology [11][12]. Group 2: Cybertruck's Impact on Battery Development - The disappointing sales of the Cybertruck have directly impacted the 4680 battery's development, as it was designed to support larger, heavier vehicles like the Cybertruck and Semi [9][11]. - Initial projections for Cybertruck deliveries have fallen short, with estimates hovering around 50,000 units, far from Elon Musk's target of 250,000 units annually [12][14]. - The significant price increases and reduced range of the Cybertruck compared to initial promises have contributed to its lackluster market performance, further complicating the 4680 battery's commercial viability [14][15]. Group 3: Technical Challenges in Battery Production - The 4680 battery aims to improve energy density by 5 times, increase range by 16%, and reduce costs by 56%, but achieving these goals has proven difficult [17][19]. - Key innovations such as the "tabless" design, high nickel content in the cathode, and dry electrode manufacturing are essential for the battery's success, yet progress on these fronts has been slow [20][23][25]. - The transition from wet to dry electrode manufacturing is particularly challenging, with industry experts predicting that full commercialization may not occur until 2027-2028 [34][35]. Group 4: Broader Implications for Tesla - Tesla's struggles with the 4680 battery and the Cybertruck suggest a shift in focus away from automotive business, as Musk appears more invested in ventures like AI and robotics [36][37]. - As Tesla's automotive sales decline by 8.6% globally in 2025, the company may view the 4680 battery as a burden rather than a priority [36][37]. - In response to market pressures, Tesla has introduced financing options to maintain sales momentum, indicating a strategic pivot in its approach to the automotive market [41].