Power supply device

A power supply device comprising:

• battery equipment that includes a positive-side block and a negative-side battery block, each of which includes a plurality of battery modules that are serially connected to each other, the positive-side and negative-side battery blocks being serially connected to each other at a reference midpoint;
• and
• voltage detecting circuitry that detects the respective voltage values of each of the plurality of battery modules of said battery equipment,
• wherein said voltage detecting circuitry includes a positive-side voltage management IC and a negative-side voltage management IC, the positive-side and negative-side voltage management ICs managing the voltage conditions of the plurality of battery modules in the positive-side and negative-side battery blocks, respectively,
• wherein positive-side and negative-side voltage power lines of each of the positive-side and negative side voltage management ICs are connected to positive-side and negative-side output terminals of said battery equipment so that all the plurality of battery modules supply electric power to each of the positive-side and negative-side voltage management ICs, and the positive-side and negative-side voltage management ICs have a common ground line,
• wherein each battery module is connected to either the positive-side voltage management IC or the negative-side voltage management IC, and each battery module connected to either the positive-side or the negative-side voltage management IC is capable of supplying electric power to the other negative-side or positive-side voltage management IC.