spacewalking astronauts help fix battery problem, run cables - li ion battery cell

On Monday, two astronauts floated outside the International Space Station for NASA's third spacewalk in less than three weeks to help replace faulty solar cells installed during the first space trip, route the Ethernet cable to extend the wireless connection and install a spare power cord for the robot arm of the lab.
NASA flight engineer Anne McLean, call EV-
Canadian astronaut David St. Jacques, EV-
At 7: 31 in the morning, they replaced the space suit with a battery. m.
EDT, officially started. it turned out to be 6-hour 29-
Minute tour, 216 since the station assembly began in 1998.
Space walkers have achieved all their main goals without any major problems.
But both astronauts had problems with helmet headsets at the end of the trip, and McLean reported moisture on the helmet visor after returning to the airlock.
But she says there is no indication of actual leaks that could pose a threat to security.
Anne McLean, sandwiched between two space station modules, is responsible for connecting the cables to provide a backup power channel for the robotic arm of the lab.
NASA
Jacques was expected to join NASA astronaut Nick Hague on Monday's spacewalk.
The Hague and McLean made the first of three spacewalks in March 22, with McLean and Christine Koch planning a second spacewalk in March 29, becoming the first
Female space walking team in space history.
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The size suit is the same as what Koch needs.
Because it takes almost a whole day for the staff to get back
The Hague replaced McLean on his second spacewalk and McLean took his place on his third space trip.
It turns out that the crew swap is just one of the changes that the crew has to deal.
During the space walk in March 22, MacLean and Hague continued to replace six old nickel with robotic arms from the space station.
Hydrogen cells in laboratory solar systems, there are three more efficient lithium-ion batteries.
Astronauts have installed "Adapter boards" that allow a single li"
The ion battery will replace two old nickel-
Hydrogen power components.
During the second space walk in March 29, Hague and Koch helped install three other li-ion batteries.
But in the test after the first EVA, the engineer encountered a li-
Ion batteries and electronic components called battery charging-
Or BCDU.
After attempting to correct the failure of the problem, the NASA manager chose to remove the faulty battery and replace it with the two recently removed nickel-
Hydrogen batteries.
They also decided to replace the BCDU with a spare one.
Astronaut Anne McLean, left, Canadian astronaut David St.
Jacques put on his space suit on Monday and worked outside the International Space Station to help correct solar system battery problems and install power and Ethernet cables.
NASA uses the robotic arm of the space station, the flight controller removes the suspect battery and the BCDU, and then re-
Installed one of the recently removed nickel
Hydrogen batteries.
They also replaced the failed BCDU with robots.
McLean tightened the bolt to keep the battery charged-
She and her former discharge unit
Jacques removed the adapter board installed in the first spacewalk to make room for the installation of the second nickel
Hydrogen batteries.
After the space walk, the flight controller will re-use the robot arm
Install the second nickel
Hydrogen Battery, restore power Channel 4A to normal output.
Kenny Todd, station operations and integration manager, said lithium failure
When the BCDU returns to Earth for inspection to find out what is wrong, the ion battery will be discarded. A new lithium-
Ion batteries will be flown to the station on future cargo flights and eventually installed in the position of two old batteries.
David Saint-
Jacques traveled Monday to a work site outside the International Space Station.
NASA used a mix of old and new batteries in the 4A channel, saying: "We expect that we can run this configuration for quite some time, and let's go back to the rated power capability of Channel 4A. ".
"So we are very pleased with the position we will end up in on the back of these EVAs and robotic activities.
"As the adapter board moves, MacLean and St-
Jacques continues his efforts to connect the Ethernet cable at the front end of the station's Destiny lab module, which will extend the wireless connection for scientific instruments installed outside the station.
A cable on the right side of the station solar truss is delayed in order to make time for the repositioning of the adapter board.
The last major task on Monday's crew agenda is to run the power cord from the central Unity module to the central S0 segment of the power truss, providing the lab's robots with spare power arms.
Although the arm already has redundant power supplies, McLean and St-
Even if one of the power supplies fails, Jacques will allow the arm to continue running.
Saint-
Jacques also works at the front end of the space station, and the Columbus laboratory module of the European Space Agency is connected to the installation of various remote-operated scientific instruments that ultimately add the accessories needed for the commercial payload platform.
He successfully installed an accessory, but he was unable to install the main unit due to unexpected interference issues.
He took documentary photos to help engineers better understand the problem before making additional attempts in future spacewalks. {
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