Fuel cell vehicle energy management and control method

Abstract

The invention discloses a fuel cell vehicle energy management and control method, which comprises the following steps: starting the condition monitoring of a power cell; Judging whether the power battery is in a normal working condition, wherein the normal working condition refers to that the power battery is in a state where the internal resistance changes steadily when discharging; controlling the fuel cell to output the power at idle speed or rated power if not; detecting the driving condition in real time if so; Calculating the required power according to the driving condition; Controllingfuel cell power output on demand. The invention is beneficial to optimizing the economic performance of the whole vehicle and ensuring the service life of the fuel cell, realizes the energy distribution of the fuel cell vehicle based on the actual working condition, -effectively avoids the problem that the life of the battery decreases due to the frequent changes of the output state of the fuel cell, thereby achieving the purpose of saving fuel and increasing the range of the fuel cell.

Description

technical field [0001] The invention relates to the field of new energy vehicles, in particular to an energy management control method for fuel cell vehicles. Background technique [0002] New energy vehicles include pure electric vehicles, hybrid vehicles and fuel cell vehicles. Hydrogen fuel cell vehicles are a type of fuel cell vehicles. The energy conversion efficiency can be as high as 60% to 70%, and the actual efficiency is about 1.5 times that of ordinary internal combustion engines. [0003] The power of fuel cell vehicles comes from the power battery and fuel cell in parallel to provide energy. Generally, the power battery is used as an auxiliary power supply to start the fuel cell, improve the power performance of the vehicle, recover regenerative braking energy, and provide electrical energy for other electrical equipment. Wait. [0004] At present, thermostat, power follower, instantaneous optimization, global optimization and rule-based control methods are us...

AI Technical Summary

Problems solved by technology

[0004] At present, thermostat, power follower, instantaneous optimization, global optimization and rule-based control methods are usually used for fuel cell vehicle energy management control methods, but each has its own disadvantages; The actual output power of the battery follows the requirements of the load and changes at any time during each logic cycle of the controller

However, when the power following strategy is adopted, due to the lack of comprehensive prediction of the actual road conditions, the supply of hydrogen and oxygen changes very frequently, which makes the overall operation of the system often fluctuate, especially in some extreme conditions (such as rapid acceleration or rapid deceleration), it is very easy to bring impact on the fuel cell itself, which is not conducive to the stability of the fuel cell in its life cycle.

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