Tractor hybrid system with extended range fuel cell and control method

Abstract

The invention discloses a tractor hybrid power system with an extended-range fuel cell and a control method, including an internal combustion engine assembly, a generator assembly, an extended-range fuel cell assembly, a power battery, a drive motor assembly, a power coupling device, a walking device and operating device assembly; the internal combustion engine assembly and the extended-range fuel cell assembly are used as a hybrid power source to output power to drive the walking device and the operating device, and at the same time generate electric energy to charge the power battery; the extended-range fuel cell assembly includes fuel The battery body, the air pressurization assembly and the methanol reforming assembly, the methanol reforming assembly and the air pressurization assembly provide hydrogen and compressed air to the fuel cell body; the control method includes five driving modes and two power generation modes; beneficial effects: The invention has the advantages of fast fuel filling speed and long cruising mileage; the exhaust gas of the internal combustion engine is used to improve the energy utilization rate of the system; and the switching of various modes can meet the power requirements of various operating conditions of the tractor.

Description

technical field [0001] The invention relates to a tractor hybrid power system and a control method, in particular to a tractor hybrid power system with an extended-range fuel cell and a control method, belonging to the field of hybrid power technology. Background technique [0002] With the development of technology, as well as the country's emphasis on agricultural mechanization and the support of relevant policies, the pace of agricultural tractors' development towards electrification and intelligence has been further accelerated, and the functional requirements and battery life of agricultural machinery have also been continuously improved. [0003] Traditional fuel cell engines require a certain flow of air as an oxidant during operation. Conventional fuel cell engines use air compressors for air boosting. 10%~20% of the fuel cell output electric energy. However, the exhaust gas discharged by the internal combustion engine has high inertial potential energy and thermal ...

AI Technical Summary

Problems solved by technology

However, the exhaust gas emitted by the internal combustion engine has high inertial potential energy and thermal energy when it is working. In reality, the gas inertial potential energy and thermal energy in the exhaust gas are often not utilized and discharged into the atmosphere.

[0004] Traditional agricultural machinery powered by internal combustion engines has many defects. It emits a large amount of harmful gases during operation. At the same time, it consumes a lot of fuel and has low economic efficiency. It does not meet the current trend of pursuing environmental protection and sustainable development.

However, agricultural machinery using pure electric power as a power source inevitably has poor endurance and battery reliability issues. Once the battery capacity is exhausted or the battery has problems, the working environment such as the field cannot be charged in time, which will inevitably affect the duration of the operation. and work efficiency

Moreover, most of the existing agricultural machinery uses the same motor or engine to supply energy to realize the walking and operation functions of the agricultural machinery. When climbing and overcoming obstacles in a complex field operation environment, it is easy to cause insufficient output power of the engine or electric motor, which affects the walking and operation of the agricultural machinery. job coordination

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