梦想改造家
Chinese researchers develop new lithium battery withstanding - 40 C with both long endurance and explosive strength_我的网站
A |
北京时间4月21日，据篮球协会官方消息，国家女篮今日在昆明海埂基地召开高原训练动员会。本次集训将开展“万次投篮计划”——在为期4周的高原训练中，每名队员都要完成1万次的投篮任务，每天投中400次，其中100次为罚篮。
国家女篮主教练宫鲁鸣对队伍前期工作给予充分肯定，特别表扬总决赛队员按时报到、行李组转训保障及队员自律表现。
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A research team led by Chen Zhongwei at the Dalian Institute of Chemical Physics under the Chinese Academy of Sciences developed a 25-ampere-hour pouch-type lithium-metal primary battery. Tests conducted by the safety laboratory of the China Electronics Standardization Institute showed that the battery achieved an energy density of more than 750 Watt-hour per kilogram at a low discharge rate, according to the report.
Meanwhile its discharge rate can be increased by up to 100 times, enabling short bursts of high-current discharge at 10C. The "C" stands for C-rate, which is the charge and discharge rates of a battery. According to sector website Battery University, the capacity of a battery is commonly rated at 1C, meaning that a fully charged battery rated at 1Ah should provide 1A for one hour. The same battery discharging at 0.5C should provide 500mA for two hours, and at 2C it delivers 2A for 30 minutes.
The new battery puts China among the world's leading players in high-power primary battery technology.
Primary batteries offer high specific energy, long storage times and instant readiness, allowing them to be used immediately even after long storage.
Primaries play an important role, especially when charging is impractical or impossible, such as in military combat, rescue missions and forest-fire services, the article said.
Traditional lithium primary batteries can store large amounts of energy for long periods, but their ability to rapidly release that energy can be limited. The new battery is designed to combine high energy density with high power output, allowing it to both operate for extended periods and provide large amounts of power when needed.
The battery can deliver short bursts of high-current discharge at up to 10C and sustain discharge at 4C. At room temperature, its specific power reaches 4,487 Watts per kilogram, according to Science and Technology Daily.
The battery also maintains strong performance under extremely cold conditions. At -40 C, the battery retains an energy density of 447 Watt-hour per kilogram at a 1C discharge rate. Its annual self-discharge rate is below 1 percent, meaning that it loses relatively little stored energy during long periods of standby.
Such characteristics could make the battery suitable for equipment that needs both long-term energy storage and sudden high-power output, including drones, robots, spacecraft and sensors deployed in remote areas.
Chen said the team achieved a breakthrough in cathode materials by developing a high-entropy oxide material and has established a pilot production line with an annual capacity of 10 tons, linking material development with battery-cell production.
The battery has passed third-party testing and is now undergoing further validation for applications including drones, robots, spaceflight simulators and field sensor nodes, according to Chen.
Global Times
。宫鲁鸣强调，本次集训将统筹技战术训练与综合素质提升，同步开展思想教育、篮球基础理论及历史文化学习。他向队员解析了基础配合战术体系，要求大家在日常学习积累中践行"比、学、赶、帮、超"的团队精神，营造良性竞争氛围。同时，他要求全体队员通过书面总结的形式系统梳理巴黎奥运会及WCBA总决赛参赛心得。
C |
宫鲁鸣提出，本次集训将开展“万次投篮计划”——在为期4周的高原训练中，每名队员都要完成1万次的投篮任务，每天投中400次，其中100次为罚篮。结合不同位置技术和实战需要，外线队员需投中200次三分球和100次两分球，内线队员需投中100次三分球和200次两分球，通过高强度、结构化的投篮训练，系统性提高投篮技术的稳定性和命中率。
国家女篮领队柴文胜强调，“三大球”振兴是体育强国建设的重要标志，中国女篮在这段征程中肩负着重任，我们每一个人要团结一心，为实现理想和信念而努力拼搏、奋斗。针对队伍新老交替的情况，柴文胜勉励老队员发挥“传帮带”的作用，在提升自身竞技状态的同时助力年轻队员成长，共同向着新奥运周期目标全力奋进。
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