What does the Battery Coolant Unit consist of?

• A. It contains a lithium iron disulfide battery and 12 cc of argon at 7,500 psi.
• B. It contains a lead-acid battery and 10 cc of argon at 3,000 psi.
• C. It contains a nickel-metal hydride battery and 8 cc of neon at 2,000 psi.
• D. It contains a lithium-ion battery and 6 cc of helium at 5,000 psi.

Answer: (A)

The Battery Coolant Unit is defined by its exact internal contents: a lithium iron disulfide battery paired with argon gas at 7,500 psi, with 12 cubic centimeters of argon. This combination fits the unit’s design because LiFeS2 provides high energy density in a compact, rugged form suitable for field equipment, while argon at that pressure serves as an inert purge and pressurization medium to protect and circulate the coolant system. The 12 cc specifies the gas volume allocated for this purpose.

Other options mix battery chemistries and gases that don’t match the unit’s intended design and operating requirements (heavier or less suitable batteries, and gases like neon or helium with different pressures), so they don’t align with the Battery Coolant Unit’s specified configuration.