Potential energy regeneration device for electric forklift

Abstract

The invention discloses a potential energy regeneration device for an electric forklift. The potential energy regeneration device comprises a motor load system, a voltage reduction type conversion circuit, a master control module, a constant current control module and a power module. The constant current control module and the power module are electrically connected. The motor load system, the voltage reduction type conversion circuit and the power module are electrically connected with the master control module and controlled by the master control module. The potential energy regeneration device for the electric forklift is provided, accordingly, load falling heating is greatly reduced, and energy regeneration and utilization are achieved.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to an energy-saving device for electric forklifts based on storage batteries and supercapacitors. Background technique [0002] In recent years, the scale of my country's logistics industry has continued to grow rapidly. In 2015, the total amount of social logistics in the country reached 219.2 trillion yuan, an increase of 3.68 times compared with 2006, with an average annual growth rate of 15.58%. The total cost of social logistics accounted for 16% of the national GDP. Among them, forklifts are the core handling equipment in the logistics industry. China's forklift industry has grown at an average annual rate of 30% for more than ten consecutive years, and has become the world's largest forklift production base. However, global warming and energy issues are becoming increasingly prominent, and high fuel prices have prompted the forklift industry to solve the current problem of la...

AI Technical Summary

Problems solved by technology

[0005] Taking Chinese patent 200610042603.3 as an example, by controlling the working mode of the motor to regulate the working state of the forklift lifting system and recover energy, it is necessary to achieve high-precision matching and response between the control system and the motor. The principle of the control system is complex and the realizability requirements higher

[0006] Taking Chinese patent 201620398878.X as an example, through three different forklift fork lowering speed adjustment methods, partial potential energy recovery is realized. Potential energy can be recovered when there is variable speed and volumetric speed regulation, so the potential energy during throttling speed regulation cannot be effectively recovered. Potential energy recovery efficiency is not high

[0007] Taking Chinese patent 201510772125.0 as an example, the potential energy of the forklift lifting system is recovered by connecting the accumulator and the recovery oil circuit in the hydraulic system, so it is necessary to greatly change the oil circuit model of the overall hydraulic system in the forklift lifting system, and the forklift lifting system Big changes, complicated operation, little replaceability

[0008] Taking Chinese patent 201620398878.X as an example, by using a newly designed reversing valve during the descent of the lifting system and using the battery to supply power to the motor, part of the potential energy is recovered by reversing the oil pump to drive the motor to generate electricity during the descent. The implementation conditions of this method Strict, it is necessary to purchase a special reversing valve made by the inventor / enterprise, which has no versatility

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