The invention provides an automobile power supply loop redundancy
system, which comprises a generator, a
main battery, a power supply switching module and a redundancy battery, wherein the generator and the
main battery serve as the main power supply, and the redundancy battery serves as a redundancy power supply. The
anode of the generator is electrically connected with the
anode of the
main battery, and the
cathode of the generator and the
cathode of the main battery are grounded; the anodes of the generator and the main battery are electrically connected with a
starter, a B-type main load and a C-type load respectively, and the anodes of the generator and the main battery are electrically connected with an A-type load, a B-type redundant load and the C-type load through the power supplyswitching module; the
cathode of the redundancy battery is grounded; the
anode of the redundancy battery is electrically connected with the B-type redundant load and the C-type load, and the anode ofthe redundancy battery is electrically connected with the A-type load through the power supply switching module. Directed at the defects in the prior art, the invention provides the automobile powersupply loop redundancy
system, and the rapid switching between the main power supply loop and the redundancy power supply loop is realized.