Meir, Koch Complete Battery Swaps to Upgrade Station Power Systems

NASA astronaut Jessica Meir enters the Quest airlock
NASA astronaut Jessica Meir enters the Quest airlock to complete a spacewalk after swapping batteries on the International Space Station that store and distribute solar power collected for the solar arrays.

At 1:33 p.m. EST, Expedition 61 Flight Engineers Jessica Meir and Christina Koch of NASA concluded their third spacewalk together. During the six hour and 58-minute spacewalk, the two NASA astronauts successfully completed the battery upgrade for one channel on one pair of the station’s solar arrays.

Today’s work included removing the last two nickel-hydrogen batteries from this area of the station’s backbone near the port solar array and moving them to an external platform. The batteries will be stored there until they can be disposed of in the next Japanese HTV cargo spacecraft after it delivers tons of supplies to the space station later this year. Meir and Koch also installed the sixth and final new lithium-ion battery, and ground controllers verified the new batteries powered up successfully to provide an improved and more efficient power capacity for station operations.

The spacewalkers concluded their work by paying tribute to Dr. Martin Luther King, Jr. Meir said he was a personal hero and looking down on planet Earth reminded her of his words: “We may have all come on different ships, but we’re in the same boat now.” Koch noted how much is owed to those who worked for civil rights and inclusion and “paved the way for not only us, but so many who have a dream.”

This was the second spacewalk outside the station in 2020. Space station crew members have now conducted 226 spacewalks in support of assembly and maintenance of the orbiting laboratory. Spacewalkers have spent a total of 59 days, 6 hours, and 10 minutes working outside the station. It is the third time all spacewalkers have been women and the 45th spacewalk to include women.

NASA astronaut Andrew Morgan and space station Commander Luca Parmitano of ESA (European Space Agency) will conduct the next spacewalk Saturday, Jan. 25, to finish installing the Alpha Magnetic Spectrometer’s (AMS) new cooling apparatus and lines and verify they are ready for use. Morgan and Parmitano began that work during three spacewalks in November and December 2019.

Today’s spacewalk was the third for Meir, who now has spent a total of 21 hours and 44 minutes spacewalking, and the sixth for Koch for a total of 42 hours and 15 minutes. Koch is third place behind Peggy Whitson and Suni Williams for cumulative time by a female spacewalker and 21st on the all-time spacewalk list for aggregate time.

Koch arrived to the orbiting laboratory in March 2019 and is nearing the end of an extended duration mission. She holds the record for longest single spaceflight by a woman and will return to Earth on Feb. 6. Her extended mission provides researchers the opportunity to observe effects of long-duration spaceflight on a woman to prepare for human missions to the Moon and Mars. Meir arrived in Sept. 2019 and is due to return in April.

Learn more about station activities by following the space station blog, @space_station and @ISS_Research on Twitter as well as the ISS Facebook and ISS Instagram accounts.

17 thoughts on “Meir, Koch Complete Battery Swaps to Upgrade Station Power Systems”

      1. Thanks Mark, I was actually wondering about the investigation into the BCDU which failed after the October 11 battery spacewalk and which was returned to Earth on SpaceX CRS-19. Any results you can share with us?

        1. Not yet. It will be dismantled for engineering testing. With different thermal conditioning procedures on these last two battery spacewalks, the BCDUs operated as expected with no issues and no further issues are anticipated.

          1. Thanks Mark, that is good news and fascinating about the thermal adjustments. I would love to hear about the test results once they are in.

  1. SHOWW! assisti ao vivo
    Parabéns a todos envolvido
    Mais tenho uma dúvida:
    A estação fica parada ou em movimento?
    Pois a velocidade é muito alta em movimento…acho q 27 mil KM

  2. As a longtime science fiction fan, I am very happy to see women as astronauts in real life while I am still alive. 🙂

  3. I watched First landing on the moon. Ever since I never miss anything about space. The Voyager, The Hubble, Curiosity, ISS and it’s making, amazing Space Shuttles, two heart breaking disasters, Space Walks, numerous Supernovae all nine planets our Milky way, Galaxies and crystal clear photographs. Thanks NASA. I look forward to see you on Mars in 2024.

    1. With different thermal conditioning procedures on these last two battery spacewalks, the BCDUs, or battery charge-discharge units, operated as expected with no issues and no further issues are anticipated.

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