Vehicle-mounted combined battery intelligent power supply electrical system and power supply method

Abstract

The invention discloses a vehicle-mounted combined battery intelligent power supply system and a power supply method. The combined battery, such as a double-battery parallel power supply device (12),a double-battery series power supply device (17) or a multi-battery series-parallel power supply device (21), is used for upgrading the traditional automobile storage battery; the intelligent power supply method, namely, the control unit (8), controls each of the battery switches in accordance with an engine state, such as shut down, start up and operation, and each battery voltage, to provide therequired electric power, the main contents include: providing a power supply similar to the conventional storage battery when the engine is stopped, and the battery leakage protection is provided asneeded; providing a higher starting voltage than a conventional storage battery to shorten the starting time when the engine is started; when the engine is in operation, a supplementary supply voltagewhich is not lower than a certain preset voltage is provided, so that the phenomenon of insufficient power supply influencing the stable operation of the engine won't occur in the electric appliancesystem.

Description

technical field [0001] The invention belongs to the technical field of vehicle-mounted power supplies for traditional internal combustion engine vehicles, and is particularly suitable for automobiles with an automatic engine start-stop control system, or automobiles that manually control engine start-stop when traffic jams or encountering red lights. Background technique [0002] Traditional internal combustion engine vehicles are facing the challenge of new energy vehicles; in the next few decades, there will be a situation where traditional vehicles and new energy vehicles coexist in the automotive field; in the short term, the dominance of traditional vehicles will not change; question is still relevant. [0003] Problems that people may encounter when using a traditional car and related to the automotive electrical system include: 1) The service life of the car battery is short, and breakdowns on the way due to battery problems occur from time to time; It takes a long t...

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Problems solved by technology

[0003] Problems that people may encounter when using a traditional car and related to the automotive electrical system include: 1) The service life of the car battery is short, and breakdowns on the way due to battery problems occur from time to time; It takes a long time, some cars equipped with automatic start-stop system, the NVH feeling of frequent engine start is not good; 3) some cars may experience engine vibration, flameout or fault light on due to insufficient power supply when starting at low speed or running in traffic jams 4) The excessive discharge of the battery or the spontaneous combustion of the car due to the leakage of the electrical system occurs from time to time

Since these dual-battery systems generally use lead-acid batteries with the same rated voltage, their start-up time has no obvious advantage compared with single-battery batteries

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