KR20230014391A - In-wheel motor drive system for military vehicles powered by hydrogen fuel power - Google Patents

Abstract

The present invention relates to an in-wheel motor drive system for a military vehicle powered by hydrogen fuel power. More specifically, the present invention relates to an in-wheel motor drive system for a military vehicle, which is able to transport power through an in-wheel motor assembly located in each wheel by the electric power generated through the hydrogen fuel cell system, prevent environmental pollution due to driving, and provide an efficient electronic operation environment. The in-wheel motor drive system for a military vehicle comprises: a hydrogen storage device including a case and a plurality of hydrogen tanks installed inside the case; a fuel cell system which generates electric power using the hydrogen supplied from the hydrogen storage device as a main fuel; a vehicle battery for storing surplus power or power generated through regenerative braking; a drive system driving by receiving power from the fuel cell system and the vehicle battery, and composed of a plurality of in-wheel motor controllers, a plurality of in-wheel motor inverters, and a plurality of in-wheel motor assemblies.

Description

In-wheel motor drive system for military vehicles powered by hydrogen fuel power}

The present invention relates to an in-wheel motor driving system for a military vehicle driven by hydrogen fuel power, and in particular, by transmitting power through an in-wheel motor assembly located in each wheel with electric power generated through a hydrogen fuel cell system, environmental pollution caused by driving It relates to an in-wheel motor drive system for military vehicles that prevents and provides an efficient battlefield operation environment.

In general, military vehicles such as automobiles, tanks, and armored vehicles used for military purposes use an internal combustion engine such as a gasoline engine or a diesel engine to drive wheels.

Here, among the military vehicles, an armored vehicle is a light armored vehicle for protecting vehicle occupants, and is a military vehicle used for troop transport or combat.

Among these military vehicles, armored vehicles are divided into two types: wheeled and tracked, wheeled armored vehicles use general car wheels, and tracked armored vehicles, like tanks, use caterpillars.

Among these, wheeled armored vehicles using internal combustion engines such as diesel engines prioritize performance such as durability and maximum output, and have not been greatly affected by exhaust gas environmental regulations for greenhouse gas reduction. there is.

As a result, the weight of the wheeled armored vehicle, which is a military vehicle, is heavy and the resulting power loss occurs, and the application of a larger internal combustion engine is continuously required to compensate for this and demonstrate higher performance.

In addition, military vehicles using an internal combustion engine, such as wheeled armored vehicles, not only pollute the environment due to exhaust gas during operation, but also generate excessive noise unique to the internal combustion engine, adversely affecting the crew as well as the surrounding environment.

Accordingly, in order to continuously reduce greenhouse gas (CO2) emissions in countries around the world, including the European Union, regulations are being strengthened, such as restricting internal combustion engine vehicles from entering cities and banning the sale of new vehicles with internal combustion engines from 2030. Manufacturers are also gradually discontinuing development of internal combustion engines and concentrating their efforts on developing eco-friendly vehicles.

In addition, military vehicles such as wheeled armored vehicles are also increasingly required to follow this trend.

However, when a battery-powered electric military vehicle is configured to generate power only with a battery among various methods for replacing an internal combustion engine, the conventional military vehicle realizes the high weight of the vehicle due to protection conditions and the performance required to perform combat missions. A high-capacity battery is required for this, and in this case, there are many disadvantages to operating in a battlefield environment due to excessive charging time and short power duration of the battery.

In addition, conventional internal combustion engine military vehicles use mechanical power transmission devices such as auxiliary transmissions, gear units, and drive shafts to transform the power transmitted through the engine and transmission to meet requirements, resulting in poor utilization of space inside the vehicle and power There is a problem in that loss occurs and vehicle weight increases.

Publication No. 10-2019-0083436 Registration No. 10-1364640

Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to satisfy eco-friendly requirements by transmitting power through an in-wheel motor assembly located in each wheel with electric power generated through a hydrogen fuel cell system. In addition, it is to provide an in-wheel motor drive system for military vehicles driven by hydrogen fuel power that promotes an efficient battlefield operation environment with a short charging time compared to electric charging.

Another object of the present invention is to maintain maneuverability equal to or higher than conventional maneuverability even after removing most of the mechanical power transmission device by using an in-wheel motor assembly, improve protection by utilizing space under the vehicle, increase space utilization, and reduce power loss. And to provide an in-wheel motor drive system for military vehicles driven by hydrogen fuel power capable of reducing vehicle weight.

In order to achieve the above object, the present invention provides an in-wheel motor driving system for a military vehicle, comprising: a hydrogen storage device including a case and a plurality of hydrogen tanks installed inside the case; a fuel cell system that generates electric power using the hydrogen supplied from the hydrogen storage device as a main fuel; A vehicle battery for storing surplus power or power generated through regenerative braking; a driving device driven by receiving power supplied from the fuel cell system and the vehicle battery, and including a plurality of in-wheel motor controllers, a plurality of in-wheel motor inverters, and a plurality of in-wheel motor assemblies; It is characterized by consisting of.

The present invention is characterized in that in the in-wheel motor driving system for military vehicles driven by hydrogen fuel power, the hydrogen storage device can store and supply gaseous hydrogen or liquefied hydrogen.

The present invention relates to an in-wheel motor driving system for a military vehicle driven by hydrogen fuel power, wherein the fuel cell system uses gaseous hydrogen or liquefied hydrogen as a main fuel.

The present invention is an in-wheel motor drive system for military vehicles driven by hydrogen fuel power, wherein the vehicle battery stores surplus power remaining after operation of each in-wheel motor assembly among power generated from a fuel cell system and power generated through regenerative braking and can be used again.

The present invention is an in-wheel motor driving system for military vehicles driven by hydrogen fuel power, wherein the vehicle battery transfers surplus power remaining after operation of each in-wheel motor assembly and power generated by regenerative braking to each in-wheel motor assembly, in-wheel motor inverter, and in-wheel Characterized in that the charging is performed through the motor controller.

The present invention relates to an in-wheel motor drive system for military vehicles driven by hydrogen fuel power, wherein the in-wheel motor assembly includes a drive motor driven by electric power generated in a fuel cell system, a reducer that amplifies the rotational driving force of the drive motor, and a hydraulic or pneumatic type. It is characterized in that it includes a brake system, a suspension device (damping device) and wheels.

The present invention is characterized in that in the in-wheel motor driving system for military vehicles driven by hydrogen fuel power, the driving device operates only with power from a vehicle battery or operates simultaneously with power from a fuel cell system.

The present invention relates to an in-wheel motor driving system for a military vehicle driven by hydrogen fuel power, wherein the driving device can drive by driving only a part of each in-wheel motor assembly according to a driver's (user's) selection or road surface conditions. .

In addition, the present invention further provides a military vehicle having the in-wheel motor driving system.

As described above, the in-wheel motor driving system for military vehicles driven by hydrogen fuel power according to the present invention drives a wheel-driven military vehicle with hydrogen power using hydrogen as the main fuel, thereby blocking the emission of greenhouse gases and polluting the environment. has the effect of preventing

In addition, the present invention has an effect of minimizing disadvantageous factors when operating in a battlefield environment because the charging time of hydrogen fuel is shorter than that of an electric vehicle.

In addition, the present invention reduces failure factors, improves protection by utilizing the space under the vehicle, and increases the utilization of space inside the vehicle by mostly not applying various mechanical devices for power transmission while maintaining the maneuverability of the existing military vehicle through the in-wheel motor driving system. And it is possible to promote effects such as weight reduction.

1 is a diagram schematically showing the configuration of an in-wheel motor driving system mounted on a military vehicle according to a preferred embodiment of the present invention.
FIG. 2 is a schematic representation of the functional structure of FIG. 1 .
3 is a diagram showing power flow when the in-wheel motor driving system according to the present invention drives all wheels with maximum output.
4 is a diagram of driving an in-wheel motor among the power generated in the fuel cell system according to the present invention, charging the vehicle battery with surplus power remaining and power generated by regenerative braking between driving, and driving the in-wheel motor assembly through the battery again. It is a diagram showing the power flow.
5 is a diagram showing power flow when driving some wheels of a military vehicle equipped with an in-wheel motor driving system according to the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in more detail based on the accompanying drawings.

Here, components having the same function in all the drawings below use the same reference numerals, and repetitive descriptions are omitted, and terms to be described later are defined in consideration of the functions in the present invention, which has a unique commonly used meaning. to be interpreted as

As shown in FIGS. 1 to 5 , the in-wheel motor driving system 100 for a military vehicle driven by hydrogen fuel power according to the present invention includes a hydrogen storage device 110; a fuel cell system 120; It is roughly divided into a vehicle battery 130 and a driving device 140.

The hydrogen storage device 110 includes a case 111, a plurality of hydrogen tanks 112 installed inside the case 111, and a regulator (not shown) that keeps the pressure of the hydrogen tank 112 constant and sends it to the outside. ), and a valve for supplying hydrogen at a constant pressure through the regulator and a quick connector (not shown) installed to facilitate assembly of the entire case 111 including the hydrogen tank 112 to the vehicle.

In addition, since the hydrogen tank 112 is fitted with pipes and connectors in parallel inside the case 111, it can be used until all the hydrogen stored in the last hydrogen tank 112 is discharged to the outside, and the When all the hydrogen is used up, hydrogen fuel is charged from the outside through the charging port.

In addition, storage methods of hydrogen as a fuel include liquid hydrogen storage, gaseous hydrogen storage using a high-pressure compression method, and hydrogen storage methods using hydrogen storage materials (metal hydroxides and porous nanomaterials).

The hydrogen tank 112 is a device for storing hydrogen charged in various forms such as gaseous hydrogen or liquefied hydrogen and supplying hydrogen necessary for power generation to the fuel cell system 120. It can be formed in various shapes such as a shape or a polygon, and has a connector for connection between an inlet for filling and a tank.

Since the hydrogen storage device 110 having this configuration is applied to vehicles in various forms, a detailed description thereof will be omitted.

The fuel cell system 120 includes a fuel cell stack (not shown), a hydrogen and air supply device (not shown), and a thermal management device (not shown) to generate power by receiving hydrogen from the hydrogen storage device 110. ).

The fuel cell system 120 preferably uses gaseous hydrogen or liquefied hydrogen as a main fuel.

The fuel cell stack has a structure that generates electricity through a chemical reaction between hydrogen supplied from the hydrogen storage device 110 and oxygen supplied through outside air.

In addition, the fuel cell stack is connected to a hydrogen recirculation device, a humidifier, a hydrogen capture/dilution device, and the like, and is configured to discharge water and purge gas generated from the cathode through an exhaust line.

The hydrogen and air supply device includes a hydrogen supply device for supplying hydrogen as a fuel to the fuel cell stack and an air supply device for supplying air (oxygen) to the fuel cell stack.

Here, the hydrogen supply device includes a hydrogen tank, a high/low pressure regulator, a hydrogen recirculation device, and the like.

In addition, the high-pressure hydrogen supplied from the hydrogen tank of the hydrogen supply device passes through the high-pressure/low-pressure regulator in turn and is supplied to the fuel cell stack at low pressure through a separate common distributor. In the hydrogen recirculation device, a blower is installed in the recirculation line. Reuse of hydrogen is promoted by recycling unreacted hydrogen remaining after use at the hydrogen electrode (anode) of the fuel cell stack to the hydrogen electrode.

In addition, the air supply device is composed of a compressor generating charge air by compressing external air to supply air to the fuel cell stack, and an intercooler cooling the charge air heated by the compressor to increase the density of the charge air. .

In addition, the hydrogen and air supply device may include an exhaust system for discharging moisture, air, fuel, etc. generated during the power generation reaction of the fuel cell stack.

The thermal management device supplies cooling water contained therein to the inside of the fuel cell stack at a constant pressure so that the fuel cell stack can maintain an appropriate operating temperature of 25 to 80° C. by suppressing a temperature rise due to heat generated by an electrochemical reaction. A pump (not shown) that pumps heat generated in the fuel cell stack, a radiator (not shown) that dissipates heat from cooling water that has absorbed heat generated in the fuel cell stack to the outside, a circulation pipe (not shown) through which the cooling water circulates, and a fuel cell stack. It is configured to include an internal cooling water path (not shown).

That is, since the heat management device is required to keep the temperature of the fuel cell stack constant, and is generally applied to a fuel cell system, a detailed description thereof will be omitted.

The fuel cell system 120 having this configuration receives hydrogen from the hydrogen storage device 110 and generates power.

Here, the fuel cell system 120 includes a fuel cell stack, a hydrogen and air supply device, a thermal management device, a voltage regulator (not shown), and a system control device (not shown) that controls the overall operation of the fuel cell system 120. ), and the like, it is possible to change the internal configuration, power generation method, maximum power generation amount, etc. according to the requirements of the military vehicle 200.

As described above, the present invention drives the in-wheel motor driving system 100 of the military vehicle 200 with hydrogen power by installing the hydrogen storage device 110 and the fuel cell system 120 using gaseous hydrogen or liquefied hydrogen as the main fuel. By enabling this, instead of greenhouse gas due to combustion of fossil fuel, the fuel cell system 120 in the fuel cell system discharges water generated after hydrogen and oxygen electrochemical reaction (Zero-Emission), thereby meeting the eco-friendly requirements of military vehicles. , and can provide an efficient battlefield operation environment through a shorter hydrogen charging time compared to electric charging.

The vehicle battery 130 is a battery for storing surplus power or power generated through regenerative braking of the military vehicle 200 or directly driving a drive device 140 to be described later, and the requirements of the military vehicle 200 Depending on the number of batteries, the maximum voltage and capacity can be increased or decreased.

That is, after driving each in-wheel motor assembly 141 of the driving device 140, rotation in the opposite direction to the existing rotation direction occurs, such as surplus power and deceleration, which remain as power is no longer required depending on the driving situation, and each in-wheel motor generates a generator When electric power is generated by regenerative braking, which plays a role of, it is necessary to store this electric power for use.

This power is stored in the vehicle battery 130 through each in-wheel motor inverter 143 and in-wheel motor controller 142 of the driving device 140 described below.

In this way, the electric power stored in the vehicle battery 130 can drive the driving device 140 through each in-wheel motor inverter 143 in the opposite flow of charging.

In addition, when a lot of power is required for the driving device 140 of the military vehicle 200, not only the power generated through the hydrogen fuel cell but also the power stored in the vehicle battery 130 is applied to each in-wheel motor assembly 141 at the same time. It can also drive each wheel with great force.

The driving device 140 includes a plurality of in-wheel motor controllers 142 driven by receiving power from the fuel cell system 120 and a vehicle battery 130, a plurality of in-wheel motor inverters 143, and a plurality of in-wheel motors. It consists of a motor assembly (141).

Each of the in-wheel motor assemblies 141 includes a driving motor (not shown) driven by the power generated by the fuel cell system 120, a speed reducer (not shown) that amplifies the rotational driving force of the driving motor, and decelerating or stopping the vehicle. It includes a hydraulic or pneumatic brake system (not shown), a damping device (not shown) and wheels (reference numerals not shown) used to park or maintain a parked state.

Since the configuration of the in-wheel motor assembly 141 is commonly used in an in-wheel motor vehicle, a detailed description thereof will be omitted.

Each in-wheel motor controller 142 is connected to an output terminal of the fuel cell system 120 and controls the behavior of each in-wheel motor assembly 141 by IGBT switching through Pulse Width Modulation (PWM) control.

Each in-wheel motor inverter 143 is connected between each in-wheel motor controller 142 and each in-wheel motor assembly 141 so that the voltage supplied to each in-wheel motor assembly 141 is safely maintained, and the vehicle battery 130 ) and the balance of different output voltages of the fuel cell system 120 are matched, and the surplus voltage and regenerative braking energy of the fuel cell system 120 are supplied to the vehicle battery 130 as a charging voltage.

As described above, the present invention uses a plurality of in-wheel motor drive devices 140 to avoid using some parts of the mechanical power transmission device that had to be used in conventional internal combustion engine military vehicles, so that the maneuverability performance of conventional military vehicles is equal to or better than that of conventional military vehicles. However, it is possible to obtain advantages such as increased utilization of space inside the vehicle, reduced loss due to power connection, and reduced vehicle weight.

In addition, the present invention preferably further includes a vehicle controller 150 and a driving mode controller 160.

The vehicle controller 150 is to transmit the electric power generated from the fuel cell system 110 to the driving device 140 and to control the driving force and braking force of the military vehicle 200 at the same time.

Since the vehicle controller 150 is generally provided for electric vehicles, hybrid vehicles, and hydrogen vehicles, a detailed description thereof will be omitted.

The driving mode controller 160 is a controller for changing the driving mode according to driving conditions of the vehicle, such as road surface conditions, and the driving mode can be changed to an automatic selection mode or a manual selection mode according to requirements. The automatic selection mode detects wheel slip and vehicle speed according to the road surface conditions and automatically controls the in-wheel motor to control power transmission. It means to control power transmission.

Meanwhile, the present invention further provides a military vehicle 200 having an in-wheel motor driving system 100 driven by hydrogen fuel power.

Referring to the working state of the present invention configured as described above is as follows.

First, when driving a military vehicle 200 equipped with an in-wheel motor driving system 100 according to the present invention, a separate vehicle controller 150 is controlled to supply electric power generated from the fuel cell system 120. It is transmitted to the driving device 140.

As a result, the electric power generated from the fuel cell system 120 is transmitted to each in-wheel motor controller 142 of the military vehicle 200, and each in-wheel motor controller 142 controls each in-wheel motor inverter 143. It operates, and through this, each in-wheel motor assembly 141 is driven.

Subsequently, when each in-wheel motor assembly 141 is driven, the drive motor constituting each in-wheel motor assembly 141 rotates and drives each pair of left and right wheels to drive.

In addition, when the military vehicle 200 decelerates or brakes through the in-wheel motor assembly 141, surplus power or power generated through regenerative braking may be stored.

For example, as shown in FIG. 4, when the military vehicle 200 decelerates or brakes, power is not needed and surplus power remains, and rotation in the opposite direction to the rotation direction of each in-wheel motor assembly 141 during driving occurs while driving the motor serves as a generator, and when power is generated by regenerative braking, this power is stored in the vehicle battery 130 for use.

In addition, the electric power stored in the vehicle battery 130 is used to drive each wheel with great power together with the power generated from the fuel cell system 120 when a lot of power is needed during acceleration or driving on a hill, or at low speed or When a lot of power is not required, such as when driving downhill or at constant speed, each in-wheel motor assembly 141 is driven through each in-wheel motor inverter 143 with a reverse flow of charging using only the electric power stored in the vehicle battery 130, thereby driving each in-wheel motor assembly 141 with little power. can be used to drive each wheel.

In addition, the in-wheel motor driving system 100 according to the present invention includes a plurality of in-wheel motor assemblies 141 as shown in FIG. Wheel power may be blocked or applied through control of each in-wheel motor assembly 141 .

For example, in a situation where driving is possible with relatively little gripping force, such as on a flat surface or a paved road, only some of the four wheels may be driven to drive to improve fuel efficiency.

That is, as shown in FIG. 5, the second and third in-wheel motor controllers 142 of the military vehicle 200 transmit the information to the second and third in-wheel motor controllers 142 of the military vehicle 200 in order to improve fuel efficiency in a situation in which driving is possible with relatively little gripping force, such as on a flat surface or on a paved road. And the third in-wheel motor controller 142 operates the second and third in-wheel motor inverters 143, through which the second and third in-wheel motor assemblies 141 are driven.

In addition, as the second and third in-wheel motor assemblies 141 are driven, only the second and third wheels are driven to drive.

Therefore, the military vehicle equipped with the in-wheel motor driving system according to the present invention minimizes disadvantageous factors when operating in a battlefield environment, prevents environmental pollution due to exhaust gas, increases the utilization of space inside the vehicle, and reduces losses due to power connection. reduction and vehicle weight reduction.

The present invention described above is not limited by the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes to other equivalent embodiments are possible within the scope of the technical spirit of the present invention. It will be clear to those skilled in the art to which the present invention pertains.

100: in-wheel motor driving system 110: hydrogen storage device
111: case 112: hydrogen tank
120: fuel cell system 130: vehicle battery
140: driving device 141: in-wheel motor assembly
142: in-wheel motor controller 143: in-wheel motor inverter
150: vehicle controller 160: driving mode controller
200: military vehicle

Claims (9)

As an in-wheel motor drive system for military vehicles,
a hydrogen storage device including a case and a plurality of hydrogen tanks installed inside the case;
a fuel cell system that generates electric power using the hydrogen supplied from the hydrogen storage device as a main fuel;
A vehicle battery for storing surplus power or power generated through regenerative braking;
a driving device driven by receiving power supplied from the fuel cell system and the vehicle battery, and including a plurality of in-wheel motor controllers, a plurality of in-wheel motor inverters, and a plurality of in-wheel motor assemblies; An in-wheel motor drive system for military vehicles driven by hydrogen fuel power, characterized in that consisting of. According to claim 1,
The hydrogen storage device is an in-wheel motor drive system for military vehicles driven by hydrogen fuel power, characterized in that it can store and supply gaseous hydrogen or liquefied hydrogen. According to claim 1,
The fuel cell system is an in-wheel motor driving system for military vehicles driven by hydrogen fuel power, characterized in that gaseous hydrogen or liquefied hydrogen is used as a main fuel. According to claim 1,
The battery for the vehicle stores and reuses surplus power remaining after operation of each in-wheel motor assembly and power generated through regenerative braking among the power generated from the fuel cell system. In-wheel for military vehicles driven by hydrogen fuel power, characterized in that motor drive system. According to claim 1,
The battery for the vehicle charges surplus power remaining after operation of each in-wheel motor assembly and power generated by regenerative braking through each in-wheel motor assembly, in-wheel motor inverter, and in-wheel motor controller For military vehicles driven by hydrogen fuel power, characterized in that In-wheel motor drive system. According to claim 1,
The in-wheel motor assembly includes a driving motor driven by power generated in a fuel cell system, a speed reducer for amplifying the rotational driving force of the driving motor, a hydraulic or pneumatic brake system, a damping device, and wheels. An in-wheel motor driving system for military vehicles driven by hydrogen fuel power, characterized in that. According to claim 1,
The in-wheel motor drive system for military vehicles driven by hydrogen fuel power, characterized in that the drive device operates only with power from the vehicle battery or operates the drive device simultaneously with power of the fuel cell system. According to claim 1,
The driving device is an in-wheel motor driving system for military vehicles driven by hydrogen fuel power, characterized in that it can drive by driving only a part of each in-wheel motor assembly according to the driver's (user's) selection or road surface conditions. A military vehicle provided with the in-wheel motor drive system according to any one of claims 1 to 8.

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