Core Viewpoint - Welding is transitioning from a backend process to a front-line capability in lithium battery manufacturing, significantly impacting internal resistance, temperature performance, yield stability, and production costs [2][3]. Group 1: Current Challenges in Welding Technology - The mainstream welding methods for multi-layer current collectors and covers typically use a "three-step" or "two-step" process, which is becoming less viable as cell capacities increase and layer counts rise [3][4]. - Traditional welding processes are revealing issues such as lengthy procedures, accumulated defects, and increased difficulty in stability control, particularly as the number of layers continues to rise [5][6]. Group 2: Technical Aspects of Pressure Melting Welding - Pressure melting welding seeks to balance heating and pressure to achieve atomic bonding by breaking down surface layers, with a focus on high energy density and controllability [6][7]. - This method involves simultaneous application of pressure and electrical current, utilizing the Joule effect for localized melting, which distinguishes it from traditional resistance welding [6][7]. Group 3: Performance and Validation of Pressure Melting Welding - In tests involving over a hundred layers, pressure melting welding achieved stable welds without splatter or defects, with mechanical strength exceeding the industry standard of 120N and a peel residual rate of 100% [9][10]. - The process demonstrated a peak temperature rise of less than 100°C during welding, ensuring minimal thermal risk to surrounding components [9][10]. Group 4: Innovations and Future Applications - Pressure melting welding is not only applicable to multi-layer current collectors but also enhances existing two-step or three-step production lines by reducing debris generation [10]. - The technology is adaptable for lightweight and miniaturized designs, and it offers new manufacturing possibilities for dissimilar metal welding, which is crucial as the industry shifts towards manufacturing capability-driven innovations [10].

Core Viewpoint - The lithium battery industry is experiencing rapid growth, but traditional drying technologies face significant challenges that hinder cost reduction and efficiency improvements [6]. Group 1: Industry Trends - The global lithium battery production capacity is continuously expanding, yet the drying technology bottleneck is becoming increasingly prominent [6]. - The traditional hot air drying process has three main pain points: low efficiency requiring nearly 100 meters of drying ovens, high energy consumption of one million kcal of fossil energy per hour, and high costs where drying energy consumption accounts for 15% of total battery production energy [6]. Group 2: Technological Innovations - Leisuo New Materials has developed a flat infrared system that overcomes industry bottlenecks by using infrared radiation for direct heating of electrode sheets, revolutionizing traditional heating methods [6]. - Xingheng Power has made breakthroughs in manganese-based materials, achieving a high energy recovery rate of 98.18% for lithium manganese oxide and reducing production costs for lithium iron phosphate [12]. - Kaluowide's pressure melting welding technology combines pressure and melting to achieve over 99.9% welding yield for ear and pole connections, significantly enhancing energy efficiency and addressing welding challenges [15]. - Times High-Tech's innovative solution for drying solid-state batteries involves using diode lasers for surface heating and multi-point temperature measurement, providing a low-cost and environmentally friendly alternative [16]. Group 3: Market Applications - The adoption of large-capacity models is accelerating the electrification process, with battery swapping models being preferred for long-distance logistics due to their efficiency in energy replenishment [10]. - The integration of CTB batteries by Qiyuan Chip Power enables a shared energy ecosystem, allowing for rapid energy replenishment in heavy-duty vehicles [7].