Air conditioning can be controlled by the cooling system to maintain a temperature of the battery or an ambient temperature in which the first battery is stored (e.g., in a battery room) to a specified temperature. Additionally, or alternatively, the cooling system can include a fan that is arranged to direct air at the cold region of the TEC or a cold plate that is connected to the cold region of the TEC.

Sensors 240 can include current sensors to monitor electric currents to and from the batteries, voltage sensors of the batteries and the voltage converter, and/or temperature sensors for the batteries and/or ambient temperatures in which the batteries or IT equipment are held.

The first battery and the second battery can be located in battery room 220 of the data center. The batteries can be electrically connected to IT equipment that is located in an IT room 240 of the data center. Controller 206 can be configured to manage a temperature in the battery room with a fan or air conditioner. In some embodiments, the first battery can include a third battery 210. The third battery can be charged in a similar manner as described in FIG. 1.

For example, the third battery can be electrically connected to the voltage output of the voltage converter that boosts a voltage output of the TEC that is thermally coupled to the first battery. In some embodiments, the system can include separate TEC and converter circuits for each auxiliary battery (e.g., a TEC and converter for the second battery, another TEC and converter for the third battery, another TEC and converter for a fourth battery, etc.). Further, multiple primary (e.g., first battery) batteries can be located in the battery room with corresponding auxiliary batteries.