EP-4741582-A1 - ELECTRIC CONSTRUCTION MACHINE

EP4741582A1EP 4741582 A1EP4741582 A1EP 4741582A1EP-4741582-A1

Abstract

An electric construction machine according to the present invention comprises: a vehicle body; a battery disposed on the vehicle body; a power distribution unit to which power is supplied from the battery; a motor unit that is supplied with power from the power distribution unit for traveling or working of the vehicle body; and a power module mounting unit which is disposed on the vehicle body and on which a power module for supplying power is replaceably mounted; wherein the power distribution unit is supplied with power from the power module and the battery.

Inventors

SEO, Hyunjae
HAN, YONGHEE

Assignees

HD Hyundai Infracore Co., Ltd.

Dates

Publication Date: 20260513
Application Date: 20230905

Claims (19)

An electric construction machine, comprising: a vehicle body; a battery disposed on the vehicle body; a power distribution unit to which power is supplied from the battery; a motor unit that is supplied with power from the power distribution unit for traveling or working of the vehicle body; and a power module mounting unit which is disposed on the vehicle body and on which a power module for supplying power is replaceably mounted, wherein the power distribution unit is supplied with power from the power module and the battery.
The electric construction machine of claim 1, wherein the construction machine is configured to be driven only by power from the battery.
The electric construction machine of claim 1, further comprising a cooling device for cooling heat generated from the power module.
The electric construction machine of claim 1, wherein the motor unit includes a traveling motor for traveling of the vehicle body.
The electric construction machine of claim 1, further comprising a working implement which is disposed at a front of the vehicle body and includes a boom and a bucket.
The electric construction machine of claim 5, further comprising a hydraulic pump for supplying hydraulic oil to a hydraulic actuator of the working implement.
The electric construction machine of claim 6, wherein the motor unit includes a working motor for driving the hydraulic pump by receiving power from the power distribution unit.
The electric construction machine of claim 7, further comprising an inverter for converting DC electricity supplied from the power distribution unit into AC electricity and supplying the AC electricity to the working motor.
The electric construction machine of claim 1, wherein the power module mounting unit comprises: a cylinder; a cylinder rod that is retracted into and extended from the cylinder; and a lifting member which is connected to the cylinder rod, is moved up and down, and is for raising or lowering the power module.
The electric construction machine of claim 9, wherein the power module mounting unit further comprises a side plate disposed to face the power module.
The electric construction machine of claim 10, wherein the power module is fixed to the side plate.
The electric construction machine of claim 1, wherein the power module mounting unit is characterized in that a fuel cell module, a battery module, and a hybrid module including an engine and a generator can all be replaceably mounted.
The electric construction machine of claim 1, wherein the power module is one of a fuel cell module, a battery module, and a hybrid module including an engine and a generator.
The electric construction machine of claim 13, wherein the power module includes a controller for each module.
The electric construction machine of claim 13, wherein the generator produces electricity by the engine, and the hybrid module further comprises an inverter for converting AC electricity produced by the generator into DC electricity.
The electric construction machine of claim 1, wherein the power module is a fuel cell module, and the fuel cell module comprises: a hydrogen tank; and a fuel cell power pack for receiving hydrogen from the hydrogen tank to produce electricity.
The electric construction machine of claim 16, wherein the hydrogen tank is disposed at a lower portion of the fuel cell module.
The electric construction machine of claim 17, wherein the fuel cell power pack is disposed on an upper side of the hydrogen tank.
An electric construction machine, comprising: a vehicle body having a working implement, which includes a boom and a bucket, disposed at a front thereof; a fuel cell module which is detachably disposed at a rear of the vehicle body and includes: a hydrogen tank; and a fuel cell power pack disposed on an upper side of the hydrogen tank for receiving hydrogen from the hydrogen tank to produce electricity; a power distribution unit to which power is supplied from the fuel cell module; a battery which is disposed separately from the fuel cell module with respect to the power distribution unit and is charged by the fuel cell module; and a motor unit that is supplied with power from the power distribution unit for traveling or working of the vehicle body, wherein the power distribution unit is supplied with power from the fuel cell module and the battery.

Description

[TECHNICAL FIELD] The present invention relates to a construction machine, and more particularly, to an electric construction machine driven by electric energy. [BACKGROUND ART] Construction machines such as excavators and wheel loaders are widely used to perform operations such as excavating and transporting loads such as soil and sand, and loading them onto cargo vehicles such as dump trucks. These operations are performed by driving working implements installed on the construction machine, such as the bucket and the boom, and the operation of the construction machine is carried out by controlling the working implements, such as the boom and the bucket, through an actuator such as a hydraulic cylinder. A conventional wheel loader 10 shown in FIG. 1 is equipped with an engine such as a diesel engine, thus being able to work freely without restrictions on the work location. However, diesel, which is a fossil fuel, is becoming progressively depleted and causes air pollution, and thus the need for eco-friendly alternative energy is emerging seriously. In addition, fossil fuels have disadvantages in that fuel costs are high and operating costs increase due to high fuel consumption owing to the nature of heavy equipment. As one solution to this problem, electric wheel loaders using electric energy have emerged. In the case of such electric wheel loaders, unlike wheel loaders driven by diesel engines, the hydraulic pump is not driven by the engine, thus requiring an efficient layout structure, and in the case of pure electric wheel loaders, separate equipment may be required for heavy battery attachment/detachment. [DESCRIPTION OF THE INVENTION] [TECHNICAL PROBLEM] An object of the present invention is to provide an electric construction machine which is driven by electric energy, has an efficient layout structure, and allows for easy replacement of a battery or the like. [SOLUTION TO THE PROBLEM] An electric construction machine according to the present invention comprises: a vehicle body; a battery disposed on the vehicle body; a power distribution unit to which power is supplied from the battery; a motor unit that is supplied with power from the power distribution unit for traveling or working of the vehicle body; and a power module mounting unit which is disposed on the vehicle body and on which a power module for supplying power is replaceably mounted; wherein the power distribution unit is supplied with power from the power module and the battery. In addition, the construction machine may be configured to be driven only by power from the battery. In addition, the construction machine may further include a cooling device for cooling heat generated from the power module. In addition, the motor unit may include a traveling motor for traveling of the vehicle body. In addition, the construction machine may further include working implements which are disposed at a front of the vehicle body and includes a boom and a bucket. In addition, the construction machine may further include a hydraulic pump for supplying hydraulic oil to a hydraulic actuator of the working implement. In addition, the motor unit may include a working motor for driving the hydraulic pump by receiving power from the power distribution unit. In addition, the construction machine may further include an inverter for converting direct current (DC) electricity supplied from the power distribution unit into alternating current (AC) electricity and supplying the AC electricity to the working motor. In addition, the power module mounting unit may include: a cylinder; a cylinder rod that is retracted into and extended from the cylinder; and a lifting member which is connected to the cylinder rod, is moved up and down, and is for raising or lowering the power module. In addition, the power module mounting unit may further include a side plate disposed to face the power module. In addition, the power module may be fixed to the side plate. In addition, the power module mounting unit may be characterized in that a fuel cell module, a battery module, and a hybrid module including an engine and a generator can all be replaceably mounted. Additionally, the power module may be one of a fuel cell module, a battery module, and a hybrid module including an engine and a generator. In addition, the power module may include a controller for each module. In addition, the generator may produce electricity by the engine, and the hybrid module may further include an inverter for converting AC electricity produced by the generator into DC electricity. In addition, the power module may be a fuel cell module, and the fuel cell module may include: a hydrogen tank; and a fuel cell power pack for receiving hydrogen from the hydrogen tank to produce electricity. In addition, the hydrogen tank may be disposed at a lower portion of the fuel cell module. In addition, the fuel cell power pack may be disposed on an upper side of the hydrogen tank. In addition, an electric constru