Tractor hybrid power 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. The tractor hybrid power system comprises an internal combustion engine assembly, a generator assembly, an extended-range fuel cell assembly, a power battery, a driving motor assembly, a power coupling device, a traveling device and an operation device assembly, wherein the internal combustion engine assembly and the extended-range fuel cell assembly serve as a hybrid power source to output power to drive the traveling device and an operation device, meanwhile electric energy is generated to charge the power battery, the extended-range fuel cell assembly comprises a fuel cell body, an air pressurization assembly and a methanol reforming assembly, and the methanol reforming assemblyand the air pressurization assembly provide hydrogen and compressed air for the fuel cell body. The control method comprises five driving modes and two power generation modes. The tractor hybrid powersystem with the extended-range fuel cell and the control method have the beneficial effects that the advantages that the fuel filling speed is high, and the endurance mileage is long are achieved; the system energy utilization rate is improved through internal combustion engine tail gas; and the power requirements of various operation working conditions of a tractor can be met through switching of all the modes.

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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