Double battery management system of engine automatic start and stop vehicle

Abstract

The present invention relates to a double battery management system of an engine automatic start and stop vehicle. The double battery management system is provided with a starter; a first battery only used for power supply of the starter; a second battery used for power supply of loads of the whole vehicle; a generator used for power supply of the first battery and / or the second battery and the whole vehicle; a first battery sensor used for acquiring electric quantity information and charging / discharging information of the first battery; a second battery sensor used for acquiring electric quantity information and charging / discharging information of the second battery; a battery switching module used for switching connection / disconnection of the first battery, the second battery and a whole vehicle network; an engine control module used for controlling an engine; and a vehicle body control module used for controlling the battery switching module and performing information interaction with the engine control module, the first battery sensor and the second battery sensor.

Description

technical field [0001] The present invention relates to a management system for a vehicle battery, in particular to a dual battery management system for a vehicle with an automatic engine start-stop system. Background technique [0002] In the prior art, the rising oil price makes people more and more sensitive to the fuel consumption of automobiles. Everyone has turned their attention to small cars with lower fuel consumption, and even hybrid cars and electric cars. However, under the current environment where the supporting equipment is not perfect, the development of electric vehicles is still progressing slowly. At the same time, in the field of traditional automobiles, the "automatic engine start and stop" system is a device that can effectively save fuel consumption on urban roads. When encountering roads with traffic lights or serious traffic jams, the engine will be temporarily shut down automatically. When power is needed, as long as the brake is lifted, the engin...

AI Technical Summary

Problems solved by technology

In the current car idling start-stop system, like the traditional car starting method, the car is started by the starter motor, which is powered by the battery. Since the car starter is a short-time working motor, it starts frequently and has a large starting current. Therefore, the starter motor cannot work continuously for a long time, usually only a few seconds, but the high working current of the starter motor will damage the battery and greatly shorten the service life of the battery

Moreover, such a single-battery idling start-stop system will have the problem of single-battery failure.

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