"Qingeng I" solid state lithium battery system completed the Wanmi sea test

The Qingdao Institute of Bioenergy and Process, Chinese Academy of Sciences, released a message saying that the “Qingeng I” solid-state lithium battery system developed by the team of Cui Guanglei of the Qingdao Energy Storage Institute went to the Mariana Trench with the Chinese Academy of Sciences to conduct the TS03 voyage examination. The mission is to provide energy for the "Wanquan" abyss lander control system and CCD sensor, and successfully complete the 10,000-meter deep sea demonstration application, marking China's second successful application of the whole sea deep lithium secondary battery after Japan. The country of the power system.

During this voyage TS03 perform tasks in the Mariana Trench, the use of green energy solid-state lithium batteries of "Wanquan" No. abyss lander totaled nine dive, depth greater than 7000 meters, 6 times more than 10,000 m, maximum The working water depth is 10,901 meters, the accumulated underwater working time is 134 hours, and the maximum continuous working time is 20 hours. This marks that the Chinese Academy of Sciences has broken through the bottleneck of the whole sea deep power supply technology and mastered the core technology of the deep sea power system.

It is understood that the high energy density deep sea power supply technology is the bottleneck that limits the long-haul capability of deep submersibles, directly affecting the development of national autonomous deep sea exploration equipment. Previously, the full sea depth power technology capable of withstanding 100 MPa pressure was only mastered in Japan. Although China has developed oil-filled and pressure-resistant silver-zinc battery technology, it has been applied to the "Zhenlong" manned submersible, but the energy density of silver-zinc battery is lower (less than 60 Wh/kg). Short (50 times), can not meet the application requirements in the field of long-life capability of 11,000 meters deep sea. However, the existing volatile liquid electrolyte of a commercial liquid lithium battery with high energy density causes thermal runaway, and there is a great safety hazard below 3000 meters.

According to Cui Guanglei, the newly developed large-capacity solid polymer lithium battery "Qingneng I" has been tested by a third party, the energy density exceeds 250 watt-hours/kg, and the 500-cycle capacity remains above 80%, in multiple times of acupuncture and squeezing. It maintains very good safety performance under severe test conditions, effectively overcomes the safety risk of liquid lithium battery being easily out of control, meets the requirements of long-life and high safety of deep submersibles, and provides sufficient space for deep sea space stations that are vigorously developed by the country. Energy power.

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