Weak hybrid power system for thermoelectric conversion based on automobile exhaust, and control method thereof

Abstract

The invention relates to a weak hybrid power system for thermoelectric conversion based on automobile exhaust, and a control method thereof, wherein the system comprises a thermoelectric conversion unit, an output energy storage unit, a power assembly unit and a finished-automobile energy management unit, wherein a hot end of a thermoelectric device in the thermoelectric conversion unit absorbs heat carried by high-temperature exhaust; a cold end thereof constructs a temperature difference of the cold end and the hot end by cooling action of cooled water to generate direct current electric energy; the output energy storage unit charges a storage battery by using power generation energy of the thermoelectric conversion unit or a B-ISG motor, and stores, or supplies power to automobile electrical appliances of +36V and 12V, and B-ISG; the power assembly unit controls operation states of an automobile engine, the B-ISG motor and a transmission system; and the finished-automobile energy management unit comprehensively manages and controls energy of the system under various working modes. According to the invention, waste heat exhausted by automobile exhaust can be effectively recovered and used so as to increase fuel economy of automobile engine, and be helpful to reduce discharge of automobile exhaust.

Description

technical field [0001] The invention belongs to a weak hybrid power system and a control method, specifically, a B-ISG (Belt-driven Integrated Started Generator, belt-driven integrated starter / generator) weak hybrid power system based on thermoelectric conversion of automobile exhaust and control methods. Background technique [0002] At present, only about 30% of the fuel energy of the commonly used fuel engine vehicles is used to drive the vehicle, and the rest is directly lost in the form of exhaust gas or cooling water, resulting in a huge waste of energy. What is more serious is that the exhaust gas pollutes the environment. The effective use of exhaust waste heat and based on the existing hybrid electric vehicle technology can further increase the economy and efficiency of traditional hybrid electric vehicles, and will produce good social benefits and broad market prospects. The traditional hybrid power system makes the traditional engine as small as possible, so that...

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Problems solved by technology

[0002] At present, only about 30% of the fuel energy of the commonly used fuel engine vehicles is used to drive the vehicle, and the rest is directly lost in the form of exhaust gas or cooling water, resulting in a huge waste of energy. What is more serious is that the exhaust gas pollutes the environment. The effective use of exhaust waste heat and based on the existing hybrid electric vehicle technology can further increase the economy and efficiency of traditional hybrid electric vehicles, which

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