초록 ▼

A power supply device produces, on a plurality of accesses, a plurality of voltages coming from a plurality of accumulator assemblies formed by at least one accumulator element and connected in series by at least one series connection. The power supply device includes a back-up provision for mitigat

A power supply device produces, on a plurality of accesses, a plurality of voltages coming from a plurality of accumulator assemblies formed by at least one accumulator element and connected in series by at least one series connection. The power supply device includes a back-up provision for mitigating discharges of at least one of the accumulator assemblies.

대표청구항 ▼

[ What is claimed is:] [1.] A power supply device having a rest mode and a charge mode comprising:a first battery for providing a first voltage to a first pair of terminals;a second battery;a switching assembly which selectively provides a series connection between said first battery and said second

[ What is claimed is:] [1.] A power supply device having a rest mode and a charge mode comprising:a first battery for providing a first voltage to a first pair of terminals;a second battery;a switching assembly which selectively provides a series connection between said first battery and said second battery in said rest mode to supply a second voltage to a second pair of terminals; anda control circuit which monitors a first voltage level of said first battery, said control circuit changing said rest mode to said charge mode when said first voltage level drops below a predetermined level by selectively switching said switching assembly to disconnect said series connection and provide a parallel connection between said first battery and said second battery; second battery charging said first battery during said charge mode.