以下文章来源于远川科技评论 ，作者徐珊珊 远川科技评论 . 刻画这个时代（的前沿科技） 去年底宁德时代供应商大会，创始人曾毓群激情献唱《光辉岁月》。"自信可以改变未来"的歌声中，沉寂已久的 钠电池 重返聚光灯下。 和锂电池相比，钠电池生来就有两大优势： 充放电过程中，电池内部钠离子的运动方向，外电路电子运动方向相反 钠和锂在元素周期表中同属第一主族，化学性质极为相似。因此，钠电池和锂电池的工作原理也基本相同： 充电时，电池内部的钠离子从正极脱出嵌入负极；放电时，钠离子从负极脱出返回正极。这种金属离子在两极之间穿梭摇摆的电池，也被形象称为"摇椅式电池"。 宁德时代第一次对钠电池动手，是在2021年7月。 时值新能源汽车市场大爆发，有别于锂电池的钠电池高调发布，颇受市场关注。但实际上，宁德时代那场发布会时长只有10分钟，与其说产品发布，更像是技术 方案的一次验收报告，给产业界留下了巨大的想象空间。 迟到四年的热闹 蹉跎五年多，钠电池这次似乎要来真的了。 看似提供了一张量产时间表，实则是一封面向产业链的"动员令"：大哥已经准备上了，兄弟们要大胆投入。提前备足产能，别怕没有订单。 不同于面向客户的产品发布会，供应商大 ...

Group 1 - The core viewpoint of the article highlights the struggles of major tech companies like Apple and Xiaomi in the smart glasses market, while Vivo is making a bold move by launching its mixed reality device, Vivo Vision, which aims to address the shortcomings of existing products [1][4][8] - Apple's Vision Pro is reported to have disappointing sales, with projections of less than 500,000 units sold by the end of 2024, leading to speculation about its discontinuation due to weak market demand [1][7] - In contrast, Vivo Vision is set to be released at a significantly lower price point, approximately 30% less than Vision Pro, and is designed to be lightweight and comfortable for long-term wear [6][10] Group 2 - The article discusses the limitations of AI glasses, including poor display capabilities and reliance on smartphones for functionality, which hinders their potential as a mainstream computing platform [3][13] - Despite the challenges faced by AI glasses, the market is seeing a surge in interest and investment, with the Chinese embodied intelligence market projected to grow from 418.6 billion yuan in 2023 to 632.8 billion yuan by 2027 [22][27] - User feedback on AI glasses remains lukewarm, with many users primarily utilizing them for basic functions like photography and music, indicating that the technology is still in its early stages and lacks a clear competitive advantage [28][29]

Core Viewpoint - The safety of power banks has become a significant public concern due to recent recalls of several brands caused by safety risks associated with battery cells, leading to a ban on carrying non-compliant power banks on domestic flights in China [1][2]. Group 1: Industry Regulations and Safety Concerns - The State Administration for Market Regulation has revoked or suspended 3C certifications for multiple power bank and battery manufacturers [1]. - The Civil Aviation Administration of China issued an emergency notice prohibiting passengers from carrying power banks without clear 3C markings or those that have been recalled, effective June 28 [1]. - The public is urged to check whether their power banks have 3C certification, as the potential risks associated with non-compliant devices are significant [2]. Group 2: Technical Insights on Power Banks - Power banks are essentially chemical reactors that convert chemical energy into electrical energy through lithium-ion batteries, which are the most common type used commercially [5][6]. - The energy capacity of power banks is often misunderstood; for instance, a 10,000 mAh power bank can only store approximately 0.038 kWh of energy, which is relatively low compared to its weight [10][11]. - The energy density of lithium-ion batteries is significantly lower than that of explosives like TNT and gasoline, raising concerns about the potential for catastrophic failures if safety measures are not adhered to [11][14]. Group 3: Safety Mechanisms and Recommendations - The risk of power bank explosions is heightened when they are left fully charged and unused for extended periods, as this can lead to internal chemical reactions that compromise safety [20][21]. - Manufacturers are encouraged to implement robust safety measures, including circuit control and flame-retardant materials, to prevent overcharging and ensure the stability of electrode materials [23]. - Consumers are advised to store power banks at a charge level between 30% and 60% to minimize risks and prolong battery life, as well as to avoid long-term storage in a fully charged state [28][29].