Hydrogen fuel cell power system for forklift

Abstract

The invention discloses a hydrogen fuel cell power system for a forklift. The hydrogen fuel cell power system comprises a system frame, an electric pile, a lithium battery system and a hydrogen storage system; a partition plate is horizontally arranged in the system frame; the system frame is divided into an upper-layer space and a lower-layer space through the partition plate; and the lithium battery system and the hydrogen storage system are both installed in the lower-layer space. Hydrogen is stored through a hydrogen storage bottle, input and output are controlled through a bottle valve assembly, the bottle valve assembly conveys the hydrogen into a fuel cell stack for reaction, after electric energy is generated, the electric energy is adjusted to a voltage plateau required by a vehicle through a step-down DCDC, and the electric energy generated by the fuel cell stack can be directly output to a motor of the whole vehicle, and the electric energy can be also output to a lithium battery pack to be stored, and then the lithium battery pack supplies power to the motor of the electric forklift. The forklift power supply system can provide continuous output power of 5kW and peak output power of 35kW for the whole forklift, and meets the use requirements of most of 1-2.5 ton counterbalance forklifts. In the working process of the forklift, the performance of the whole forklift cannot be affected along with reduction of the stored energy.

Description

technical field [0001] The invention relates to the technical field of warehousing and logistics, and more specifically relates to a hydrogen fuel cell power system for forklifts. Background technique [0002] Forklifts play an extremely important role in the logistics system of enterprises, and are indispensable equipment in the process of cargo loading, unloading and handling operations. Internal combustion engines (diesel engines) were commonly used as power sources for early forklifts. However, with the intensification of global warming and environmental pollution, emission reduction and environmental protection are becoming important directions for the development of forklift power supply technology. With the advantages of electric forklifts being cleaner and more environmentally friendly than internal combustion forklifts, and the continuous improvement and breakthrough of battery technology, the cost of batteries and electricity consumption has gradually decreased, a...

AI Technical Summary

Problems solved by technology

[0003] At present, the existing forklift batteries have the following problems: (1) The power output of pure electric forklifts is not constant

During the use of forklifts, as the storage energy of batteries gradually decreases, their working performance will gradually deteriorate, which will affect the handling capacity of forklifts; (2) The charging time of pure electric forklifts is long and the work efficiency is low

Pure electric forklifts need to be charged after the battery power is exhausted, and the charging time is long (more than 1 hour)

Even if the fast charging technology or the overall battery replacement scheme is adopted, it will take 20 to 30 minutes, wasting a lot of time, and the work efficiency is low

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