KR102382679B1 - Integrated Flatform Chassis Where Battery, Motor and Frame are Integrated Into One - Google Patents

Abstract

The present invention is a method to solve the problems of the chassis structure technology, which is the structural frame of the conventional electric vehicle, and is a "flat chassis (扁平型車臺, platform chassis)”.
“Platform chassis” removes separate battery and motor installation space by accommodating large-capacity batteries and motors inside the chassis, optimizing powertrain installation space and improving fuel economy by reducing weight In addition, more freedom in vehicle design can be secured.
In addition, a large-capacity battery is widely loaded on the floor pan of the vehicle, and the thermal stress of the chassis structure is increased by combining an air cooling type, a water cooling type, or a phase change cooling system using the empty space between the fine tubes. Battery and motor cooling efficiency can be improved.

Description

Integrated Flatform Chassis Where Battery, Motor and Frame are Integrated Into One

The present invention is a trinity type or integrated chassis in which three parts of the battery, which is the energy source of an electric vehicle, the motor, which is the power source, and the chassis, which is the structural frame of the vehicle are integrated into one. It relates to a flat chassis (扁平型車臺, flatform chassis) that is a structure (hereinafter, “trinity type” flat chassis is used in the same sense as “integrated” flat chassis).

A flat undercarriage consists of a thick core of a bundled tube (tube) containing multiple light and low-strength hollow fine tubes, and two thin outer layers of relatively high-strength material (steel plate, aluminum plate, etc.) It is a sandwich beam-shaped panel with a three-layer structure that is overlapped with an outer layer, an intermediate layer, and an outer layer by adding (face) to express high-strength and high-rigidity material properties.

In the hollow concentric tube, which is the middle layer, a large-capacity battery is housed, and a double sinusoidal hollow tube, a hollow hollow tube, is placed on the central axis of the chassis (chassis) to contain the serial motor, so that the energy source, power source and frame are integrated into one. The flat chassis, which is a three-piece chassis, increases the moment of inertia compared to volume and shear stress such as tension, torsion, bending, and compression, and it is possible to reduce material cost and secure the degree of freedom in vehicle design.

The automobile was a structure capable of withstanding the vehicle weight and external load. Early automobiles had a simple structure in which a passenger and goods were loaded like a carriage, and a drive shaft equipped with springs and wheels was suspended from a ladder-shaped structural frame.

In the early days of automobiles, the roles and divisions between the body (body) and the frame (chassis) were clear. Types and types of chassis structures are known and are being manufactured.

The chassis, which is a structural frame for automobiles, is changing and developing in the form of adding sub-frames to increase torsional rigidity or attaching various accessories to the body woven in various materials and shapes to reduce weight. It refers to the main parts including the power train, steering system, suspension, and drive shaft as well as the frame to support it.

The chassis or frame must secure safety with strength and rigidity that can sufficiently withstand bending, torsion, and vibration caused by road impact or vehicle load received during driving. and high manufacturing productivity.

The chassis, which is a structural frame for automobiles developed from the existing internal combustion engine, has several types depending on the type of vehicle, use, drive and suspension method, and is generally an H-type frame, an X-type frame, a back born frame, and a platform. There are type frames, trust type frames, and the like.

In general, the structure of today's automobiles is a 'monocoque' method in which the chassis (car body) and the body (body) are formed as an integral structure, and the external panel itself serves as a support, and the frame structure that constitutes a separate skeleton serves as a support. It is divided into a 'body on frame' method.

The monocoque method, which has a hard outer structure like a crustacean, forms an integrated structure in which the chassis (frame) and body form an integrated structure, so that the shock is well dispersed, the noise and vibration are low and the ride quality is good. The new technology removes the skeleton of the frame structure and instead entangles the outer body with a rigid structure to maintain rigidity.

Monocoque, also known as 'unibody', refers to an integrated chassis made in one piece from the roof to the floor pan of the vehicle. It has good riding comfort by reducing noise and vibration by dispersing shock well.

On the other hand, some sports utility vehicles (SUVs) and vehicles such as buses and trucks use a body-on-frame method that combines the body on top of the chassis. Excellent rigidity and good durability.

The above structures are all structures developed according to the characteristics of the internal combustion engine, and are based on fossil fuel energy sources and power sources such as engines, reducers and clutches, but chassis for electric vehicles represented by batteries and motors. (Chassis) requires a chassis with a new shape that is optimized for electric vehicles that express the characteristics of light weight, high-strength and high-rigidity to improve fuel efficiency.

On the other hand, the in-wheel motor, in which the electric motor generating the driving force is located in the hub in the wheel of the tire, has the advantage of high degree of freedom in design, removing the motor installation space from the chassis, and removing the drive shaft and the differential gear. , because the motor is located under the suspension and moves up and down like the wheels of a car, the load holding is deteriorated due to an increase in inertial force, and the riding comfort is reduced by increasing the wheel weight and vibration transmitted to the vehicle body through the spring.

In particular, in-wheel motors are mounted at the location where vibrations due to road impact are the most severe, and as a result, durability problems and heat dissipation, weight reduction, and moisture resistance problems occur by mounting the motor in a narrow space inside the wheel. High efficiency, high performance, and durability are secured by adopting an air-cooled sealed structure because it is located inside, so it is very unfavorable to motor cooling such as copper loss due to winding resistance of the stator coil, hysteresis loss of the rotor permanent magnet, and heat generation problem due to eddy current loss commercialization is being delayed.

Republic of Korea Patent Registration 10-1127736, in-wheel motor wheel structure (applied on December 08, 2010)

An object of the present invention is to solve the problems of the conventional electric vehicle chassis structure, in which a battery, which is an energy source, and a motor, which is a power source, are accommodated and stored inside the chassis, which is the structural frame of the vehicle.扁平型車臺, platform chassis).

In addition, by devising a method for storing and storing batteries and motors optimized for the Trinity type platform, the battery and motor parts are mounted and assembled separately in different positions of the frame or chassis. It aims to improve the performance of automobiles, reduce costs, and enhance safety by providing

In order to achieve the above object, the present invention provides a chassis that is a structural frame that is basically a basic structure of a vehicle, comprising: a frame that is a skeleton constituting the chassis; a hollow positive sine wave hollow tube vertically penetrating the chassis and housing the motor; And a plurality of transverse reinforcement bead portion (bead); The frame is composed of a hollow tube (tube) horizontally, three or more multi-stage, and a hexagonal lattice-shaped member condensed in the form of a hexagonal grid as an intermediate layer (core), the intermediate layer A filler ( filler), stabilizing the outer layer against winkling or buckling, and assisting the microfibrillar tube in the hollow space between the hollow concentric tubules as the intermediate layer and between the concentric tubules and the outer layers on both sides An integrated flat undercarriage (扁平型車) characterized in that it is formed in a three-layered structure of the intermediate layer consisting of the double-sided outer layer of the plate material, the focusing-type fine concentric tube, and the auxiliary filling tube by inserting a filling tube to fill the empty space more tightly臺, platform chassis) is provided.

As another aspect of the present invention, the hollow hollow tube housing the motor unit has longitudinal corrugations, and the corrugations are the crest of a sinusoidal trigonometric waveform, that is, the value of x in the graph of y=sin(x). When this graph changes from 0 to π, it is a full wave rectifier shape in which the graph is repeated. peak) is located on the outer wall of the hollow tube and each trough of the corrugation is a bi-sinusoidal hollow tube forming the inner wall of the hollow tube, and has 36 corrugations in the circumferential direction, convex in the outer diameter direction, and the ridges and troughs of the corrugation are vertical of the frame. It is placed in the longitudinal direction on the central axis of the central part of the frame to face in the longitudinal direction, and the reinforcing bead portion has a bow-shaped cross section, and a plurality of the concentric tubes are placed on the upper and lower surfaces of the concentric tubes in the transverse direction of the frame. and forming an intermediate layer together with the fine tube by adding orthogonally to, but adding an edge beam to the edge of the frame, wherein the edge beam is a structural member having a cross-sectional shape of a WF beam and joined to the outer layers of both sides of the frame in the axial direction It supports external force or load and increases shear stress such as tensile, torsion, bending, compression, etc., and the outer layer plate material is molded to fit the shape of the reinforcing bead part of the intermediate layer, and the outer layer plate material is joined to the intermediate layer It is characterized in that the structure of the sandwich panel (sandwich panel) formed by forming the structure.

As another aspect of the present invention, an energy unit for driving a motor and an electric device is formed by accommodating a cylindrical battery in series in the plurality of fine tubes forming the middle layer of the frame, and the sine wave on the central axis of the frame in the vertical axis direction The hollow tube has a diameter of at least twice the thickness of the core of the fine tube, and stores a series motor, which is a driving source of a vehicle, inside the hollow tube, and the space between the fine tubes fills the auxiliary filler tube to provide an air flow passage. (channel), the remaining empty space between the fine tube and the auxiliary filling tube is filled with cooling water or a phase change material, and the auxiliary filling tube is used as a cooling air conduit for dissipating heat to the outside atmosphere. By forming a cooling system of heat exchange with a function, the motor unit as a driving source stored in the bi-sinusoidal hollow tube, a battery unit as an energy source accommodated in the concentric tube, the concentric tube and the auxiliary filling tube, and the It is characterized in that the frame with both sides of the outer layer as a heat sink is integrated into one chassis.

In another aspect of the present invention, in relation to the reinforcing bead portion, the reinforcing bead portion having the bow-shaped cross-section orthogonal to the concentric tube, which is an intermediate layer, reinforces the intermediate layer (core) and distributes the external force to the fine tube. and a function as a place for installing pins or bolts when vehicle accessory devices are mounted on the chassis, and four cylindrical cylinders and a plurality of bead nuts in three rows in the cross-section direction inside the reinforcing bead part having the bow-shaped cross section A part is provided to secure a support point by inserting a hollow cylinder beam into the cylindrical cylinder, and the reinforcement bead part is fastened with a bolt and a nut to join the vehicle body (body) and an accessory device such as pins or bolts. Integrated flat type, characterized in that the fastening device does not penetrate the fine tube, and the stress concentration and local stress generated in holes or notches are dispersed over the entire surface of the frame via the outer layers of both surfaces and the reinforcing bead portion. provide a chassis.

Another aspect of the present invention is in relation to the edge beam of the frame edge, inserting the outer layers of both sides of the frame into one of the inner side surfaces of both sides of the edge beam, and overlapping the flange of the edge beam and the boundary surface of the frame. The edges are joined by fillet welding, and on the other side of the outer side of the edge beam, a steering and suspension mounting part on the wheel drive shaft, a fender part and a body support part, a bonnet and a front bumper seating part, a trunk and a rear bumper seating part, etc. It is joined to the body by means of rivets, bolts, welding, etc., and the empty space between the upper and lower flanges and the web on the outside of the frame beam is a duct for a harness cable and a battery wiring cable, and a duct for a battery and a motor cooling pipe , and by adding a U-shaped channel beam to isolate the empty space from the outer surface, the flange and the web of the edge beam, and the flange and the web of the channel beam are combined to form a box beam It is characterized in that it forms an assembly beam.

As another aspect of the present invention, the battery mounted on the fine tube is stored in series in a battery socket having a lead wire of a negative (-) electrode, is accommodated in the fine tube, and the fine core together with a positive (+) electrode terminal at the end. A battery module for accommodating a tube is formed, wherein the battery module has a battery outlet connected to the power circuit, plus (+) and minus (-) terminals are fastened in a concave-convex shape, and a power management system and a star ) method, and the battery part of the vehicle frame is divided into a center side battery storage space and a side battery storage space based on the double sinusoidal hollow tube, which is the central axis, but the battery modules of both side side fine tubes are For base power, the center-side fine tube module is for intermediate power or peak power, but the center-side fine tube module can be easily attached and detached. It is characterized in that it is provided to enable the addition and replacement of batteries.

As another aspect of the present invention, each of the battery modules is connected to a main distribution and switching system (MDSS), and the main distribution and switching system (MDSS) has N input and M output lines as a switch. It is connected and consists of a power semiconductor device (PSD) having a bidirectional power conversion function of a matrix converter circuit function, which is N×M switch elements, but charging and discharging, circuit breaking, and sensor signals ( Temperature, overcurrent, overvoltage, etc.) detection, battery discharge and charging sequence designation, battery module designation for regenerative braking, etc. It provides an integrated flat undercarriage, characterized in that shortening.

In another aspect of the present invention, the serial motor, which is a power source stored in the double sinusoidal hollow tube, includes a concave groove having a diameter of 10 mm circumscribing the circumferential surface of the motor housing, and peaks and valleys of the inner wall of the double sinusoidal hollow tube ( It has 36 concave grooves formed by concave grooves formed by troughs and is used as a space for accommodating cooling piping, coil wiring, and shock insulation pads, but includes 6 water cooling system piping pipes and 6 The air-cooled cooling system air oil pipe, 12 motor coil guide parts, and 12 shock insulation pads are accommodated. 1.4142) Secure the elastic compression capacity with thickness, pull it in the longitudinal direction and insert it into the concave-convex groove, then loosen it again to fix the motor in a way to restore elasticity, and the motor unit without bolts or wedges that cause stress concentration It provides an integrated flat undercarriage, characterized in that the rotational vibration of the motor and the rolling vibration of the wheel are isolated from each other to reduce fatigue of the motor and the frame structure.

In another aspect of the present invention, in the series motor, which is a power source stored in the double sinusoidal hollow tube, the outer layer of the frame and the double sinusoidal hollow tube are perforated at a location where the motor rotation shaft intersects the wheel shaft in the orthogonal direction. ), the drive gear outlets are provided on the front wheels, the rear wheels, and the front and rear wheels, the front wheel, the rear wheel, or the four wheel drive are combined with one serial motor, and the drive shaft of the series motor unit is provided with a double helical gear to remove the axial load. gear) and make it the driving gear part of the power system (powertrain), and between the drive gear part and the differential gear part of the serial motor part, a matching gear part consisting of a double helical gear and an auxiliary shaft (Aux. shaft) gear) to separate the series motor part and the wheel part, raising the origin (O) of the motor drive shaft, and matching the deceleration effect of a certain ratio and the load impedance (Z) Provides a flat undercarriage.

Further, in another aspect of the present invention, in order to maximize conduction and convection, which are the heat transfer processes of the battery, the battery is dispersedly accommodated in the entire concentric tube to increase the heat dissipation area, and the space between the concentric tubes and the concentric tube and the convection tube By filling the space between the outer layers with the auxiliary filling tube to expand the heat conduction and convection area of the battery, the heat dissipation area is expanded 1.62π (5.08) times the radius of the fine tube (R) and the outer layers on both sides in contact with the external atmosphere ( face) as a heat sink, connecting the space between the fine tubes and the auxiliary filling tube with an air oil pipe (tube) having an intake port and an exhaust port, and adding an axial blower that blows gas in the axial direction of the oil pipe, Provided is an integrated flat chassis characterized by an air-cooling cooling method of a battery cooling system that heats heat by driving with external energy when the temperature rises.

In addition, another aspect of the present invention is a water cooling type cooling method in which water is injected as a coolant into the empty space between the fine tube accommodating the battery and the auxiliary filling tube, in addition to the air cooling method of the battery cooling system, In order to further improve the heat exchange effect of heat storage and heat dissipation, a phase change material cooling method in which a phase change material such as paraffin or an ionic compound is injected, and the auxiliary filling tube forcibly blown with an axial flow blower, the fine tube and the The air-cooled cooling method that uses the auxiliary filling tube as a heat sink for heat exchange to release heat to the outside atmosphere is the basic method, but combines it with a water cooling type or a phase change material cooling method, and a combination of air cooling type and water cooling type, or air cooling type and phase change material cooling It provides an integrated flat undercarriage, characterized in that the cooling efficiency is improved by a combination of methods and a hybrid cooling method.

Another aspect of the present invention is not to contain the series motor, which is a vehicle driving source, inside the double sinusoidal hollow tube on the central axis in the vertical axis direction, and the fine tube 100 in the horizontal direction 3, 4, 5, 4 Three and three are stacked, and 19 battery modules are added by concentrating a plurality of auxiliary filling tubes in a hexagonal grid shape, and a radial motor (radial motor) is used as a power source for an electric vehicle in the bonnet of the front wheel side of the chassis frame and the trunk part of the rear wheel side. ) or the inside of the wheel, an in-wheel motor is installed outside the chassis frame, but the power train of the radial motor has a dashboard seating part and a seat seating part, and a reinforcement bead part and rim on the wheel drive shaft. A power system fixing part having a beam as a support point, a motor part, a wheel drive shaft, a differential gear part, a steering device and a suspension device, etc. are mounted, and the support part of the in-wheel motor installed inside the wheel, the steering and suspension of the chassis frame The hollow cone beam is inserted into the cylindrical cylinder at 8 places inside the reinforcement bead part of the device seating part to secure the support point, and the bead nut part arranged in three rows on the upper and lower sides is fastened with bolts to support the motor, steering and suspension, An in-wheel motor is installed with an in-wheel motor provided with a driving power line and an inlet and outlet of the cooling system, a battery unit serving as an energy source accommodated inside the fine tube, the fine tube and the auxiliary filling tube, and the outer layers on both sides It provides an integrated flat chassis, characterized in that a frame having a heat sink is integrated into one chassis, and a motor unit, which is a power source, is installed as an exterior type of the chassis.

Another aspect of the present invention is the position and unevenness formed by the vertical double sinusoidal hollow tube formed on the floor pan of the flat chassis and the reinforcing bead and the edge beam in the horizontal direction. A receiving pad or a car pad, which is a wireless charging and current collector for a vehicle, is placed in the recessed space of the shape, and the car pad has a circular secondary side current collecting coil arranged in a hexagonal grid to form a charging pad on the ground. B. Provide a wireless power transfer circuit that forms an electromagnetic circuit with the primary feed coil of a power feeder on a road, and receives electric energy as electromagnetic waves to charge a battery cell or drive a motor, The thickness should be less than the protrusion height of the cross section of the bow-shaped cross section of the bi-sine wave hollow tube and the reinforcement bead part 106, and the car pad is fixed to the bead nut part arranged in three rows in the reinforcement bead part with a plurality of bolts. and the wiring cable of the car pad is accommodated inside the cylindrical cylinder of the reinforced bead part, and is drawn out into the outer space of the frame beam that circles the outside of the chassis, and a wireless power transmission system that connects the charging circuit part and the main distribution exchange system. It provides an integrated flat undercarriage, characterized in that it is provided.

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The "flatform chassis" of the present invention is a chassis that is a structural frame of a car, and by accommodating and storing a large-capacity battery and a motor inside the chassis, a separate battery and motor installation space are removed, thereby reducing the powertrain installation space. Through optimization and weight reduction, it is possible to secure a technical characteristic that improves the rigidity of the chassis by realizing a geometric shape that can improve fuel efficiency and secure more freedom in vehicle design.

In addition, a high-capacity battery is widely loaded on the floor pan of the vehicle, and an air-cooled, water-cooled, or phase-change cooling system is applied using the empty space between the fine tubes, and a heat exchange system that uses the bottom part of the vehicle in contact with outside air as a heat sink. In this way, it suppresses thermal strain caused by thermal stress of the chassis structure, improves battery cooling efficiency, and improves the stability of vehicle operation as the material and center of gravity of the chassis can be placed below the origin O of the wheel rotation axis. can do it

1 is an exemplary view of the section modulus (S) and relative efficiency of various beam shapes.
2 is an enlarged cross-sectional view of the three-ply structure chassis.
3 is a plan view of a trinity type flat undercarriage.
4 is a side view and a cross-sectional view of the flat undercarriage;
5 is a cross-sectional view (line A) of the flat undercarriage.
6 is a cross-sectional shape and a side view (C line) of a flat undercarriage edge beam.
7 is a cross-sectional view of a bead portion for reinforcing a flat undercarriage.
8 is a cross-sectional view of a flat undercarriage motor unit;
9 is a shape diagram of a battery unit.
10 is a diagram illustrating the shape of a battery socket and an outlet.
11 is a block diagram of a main distribution switching system.
12 is a configuration diagram of a serial motor unit mounting.
13 is a diagram illustrating the shape of a matching gear unit and a differential gear unit.
14 is a schematic diagram of a battery cooling system.
15 is a shape diagram for each cooling method.
16 is a cross-sectional view of the battery module of the chassis external motor flat chassis.
17 is a cross-sectional view of the seating position (bottom surface) of the wireless charging car pad.

Specific aspects of the present invention are described in more detail below. First, as the most basic form of the invention, one aspect of the present invention provides a chassis that is a structural frame that is a basic structure of a vehicle, comprising: a frame that is a skeleton constituting the chassis; a double sine wave hollow tube vertically penetrating the chassis and housing the motor; And a plurality of transverse reinforcement bead portion (bead); is comprised of The frame has a hollow tube (tube) horizontally, three or more multi-stage, and hexagonal lattice-type members focused in the middle layer (core), both sides of the middle layer is made of a high-strength material Two thin plates (steel plate or aluminum plate, etc.) form an outer layer on both sides. The core of the concentric tube functions as a filler supporting the plate material as the face, stabilizing the outer layer against winkling or buckling, and the middle layer, the hollow An auxiliary filling tube of an ultrafine tube is inserted into the empty space between the microtubules and between the microtubules and the outer layers of the both sides to more closely fill the empty space, and the outer layers of both sides of the plate material, the converging microtubule, and the auxiliary filling tube It is formed in a three-ply structure of the intermediate layer consisting of.

The double sinusoidal hollow tube, which is a hollow corrugated tube for housing the motor unit, has a corrugated waveform that converts a sinusoidal trough into a positive region so that the waveform period has π radians, and each peak of the waveform is hollow It is located on the outer wall of the tube and each trough of the corrugation is a positive sinusoidal hollow tube that forms the inner wall of the hollow tube, and has 36 corrugations of a convex shape in the outer radial direction in the circumferential direction. It is placed in the longitudinal direction on the central axis of the central part of the frame to face in the longitudinal direction.

In addition, the reinforcing bead portion has a bow-shaped cross section, and a plurality of the concentric tubes are added to the upper and lower surfaces of the concentric tubes in the transverse direction of the frame so as to be perpendicular to the concentric tubes to form an intermediate layer together with the concentric tubes.

An edge beam is added to the edge of the frame, and the edge beam is a structural member of the cross-sectional shape of the WF beam, which is joined to the outer layers of both sides of the frame to support an axial external force or load, and to perform tension, torsion, bending, compression, etc. The shear stress is increased, and the plate material, which is the outer layer, is molded to be assembled according to the shape of the reinforcing bead part of the intermediate layer, and the plate material, the outer layer, is joined to the intermediate layer to form a sandwich panel-shaped structure. do.

In addition, an energy unit for driving a motor and an electric device is formed by accommodating a cylindrical battery in series in the plurality of fine concentric tubes forming the middle layer of the frame, and the double sinusoidal hollow tube on the frame central axis in the longitudinal direction is It has a diameter of at least twice the thickness of the tube core, and a series motor, which is a driving source for automobiles, is housed inside the hollow tube. And the space between the fine tubes fills the auxiliary filler tube to form an air flow passage (channel), and the remaining empty space between the fine tube and the auxiliary filler tube is filled with cooling water or a phase change material, and the auxiliary filler tube is By forming a cooling system of heat exchange together with the heat sink function of the outer layer by utilizing it as a cooling air conduit for discharging heat to the outside atmosphere, the motor unit, which is a driving source stored in the bi-sine wave hollow tube, and the fine tube being accommodated inside The battery unit as an energy source, the fine tube and the auxiliary filling tube, and the frame using the both-side outer layers as heat sinks are integrated into one chassis.

In addition, with respect to the reinforcing bead portion, the reinforcing bead portion having the bow-shaped cross section orthogonal to the concentric tube, which is an intermediate layer, reinforces the intermediate layer (core) and distributes an external force to the fine tube, and a vehicle accessory device has a function as a place for installing pins or bolts when mounting to the chassis, and has four cylindrical cylinders and a plurality of bead nut parts in three rows in the cross-sectional direction inside the reinforcing bead part, so that the hollow cone beam ( A hollow cylinder beam is inserted to secure a support point, and the reinforcement bead is fastened with a bolt and a nut to connect the vehicle body (body) and accessories, so that a fastening device such as a pin or bolt does not penetrate the fine tube. Stress concentration and local stress generated in the notch or the like are dispersed over the entire surface of the frame via the both-side outer layers and the reinforcing bead portion.

With respect to the edge beam of the frame edge, the outer layers of both sides of the frame are inserted into one of the both sides of the edge beam, and the flange of the edge beam and the edge of the frame are joined by overlapping joints or fillet welding, , On the other side of the outer side of the frame beam, the steering and suspension mounting part on the wheel drive shaft, the fender part and the body support part, the bonnet and the front bumper seating part, the trunk and the rear bumper seating part, etc. are rivets, bolts, welding, etc. It is joined to the body in this way, and the empty space between the upper and lower flanges and the web outside the edge beam accommodates a duct for a harness cable and a battery wiring cable, and a duct for a battery and a motor cooling pipe, and has a U-shaped By adding a channel beam to isolate the empty space from the outer surface, the flange and the web of the edge beam, and the flange and the web of the channel beam are combined to form an assembly beam of a box beam.

Then, the battery mounted on the fine tube is stored in series in a battery socket having a lead wire of a negative (-) electrode, and is accommodated in the fine tube, and the battery for housing the fine tube together with a positive (+) electrode terminal at the end. form a module The battery module has a battery outlet connected to the power circuit, plus (+) and minus (-) terminals are fastened in a concave-convex shape, and is connected to a power source in a star manner with a power management system. The battery part of the vehicle frame is divided into a center side battery storage space and a side battery storage space based on the double sinusoidal hollow tube, which is the central axis, and the battery modules of both side concentric tubes are for base power, and the center side concentric tube The module is for intermediate power or peak power, but the center-side fine tube module is equipped with an optional detachable inlet with a locking device on the edge beam so that it can be easily detached, so that the battery can be added or exchanged to do it

Each of the battery modules is connected to a main distribution and switching system (MDSS), and the main distribution and switching system (MDSS) has N input and M output lines connected by switches, and N×M It is composed of a power semiconductor device (PSD) that has a bidirectional power conversion (Matrix Switching) function of a matrix converter circuit, which is a switch device. At this time, charging and discharging, circuit breaking, sensor signal (temperature, overcurrent, overvoltage, etc.) detection, battery discharge and charging sequence designation, battery module designation for regenerative braking, etc. Reduce the number of discharges to extend the lifespan and shorten the charging time.

And, the serial motor, which is a power source stored in the double sinusoidal hollow tube, has a concave groove having a diameter of 10 mm circumscribed on the circumferential surface of the motor housing and a concave groove of the peak and trough of the inner wall of the double sinusoidal hollow tube. It has 36 concave recessed grooves to be used as a space to accommodate cooling pipes, coil wiring, and shock insulation pads. At this time, 6 water cooling system piping pipes, 6 air cooling system air oil pipes, 12 motor coil guide parts, and 12 shock insulating pads are accommodated, and shock insulating pads made of elastomer rubber for vibration and shock absorption purposes. is √2 times (1.4142) thick of the receiving groove diameter 10mm, secures elastic compression capacity, pulls it in the longitudinal direction, inserts it into the concave-convex groove, and then loosens it again to restore elasticity. The motor unit is accommodated without bolts or wedges causing concentration, and the rotational vibration of the motor and the rolling vibration of the wheel are isolated from each other to reduce fatigue of the motor and the frame structure.

The serial motor, which is a power source stored in the positive sinusoidal hollow tube, is a front wheel by perforating the outer layer of the frame and the positive sinusoidal hollow tube at a location where the motor rotation shaft intersects the wheel shaft in a direction orthogonal to the wheel shaft. , provided on the rear wheels and front and rear wheels, combining front-wheel, rear-wheel or four-wheel drive with a single serial motor, and a double helical gear that removes axial load on the drive shaft of the serial motor unit. power train) as the driving gear part. And between the drive gear part and the differential gear part of the serial motor part, a matching gear part consisting of a double helical gear and an auxiliary rotation shaft (Aux. shaft) is placed to separate the serial motor part and the wheel part, and the motor drive shaft Raise the origin (O) of , and match the deceleration effect of a certain ratio with the load impedance (Z).

In addition, in order to maximize conduction and convection, which are the heat transfer processes of the battery, the battery is dispersedly accommodated in the entire concentric tube to increase the heat dissipation area, and in the space between the concentric tubes and the space between the concentric tubes and the outer layer, the By filling the auxiliary filling tube and expanding the heat conduction and convection area of the battery, the heat dissipation area is expanded 1.62π (5.08) times the radius of the fine tube (R), and the outer layers on both sides in contact with the external atmosphere are used as a heat sink do. And by connecting the space between the fine tube and the auxiliary filling tube with an air flow pipe (tube) having an intake port and an exhaust port, an axial flow blower for blowing gas in the axial direction of the oil pipe is added, and when the temperature rises, it is driven with external energy The air-cooled cooling method of the battery cooling system that heats up the heat is adopted as the basic cooling method.

Furthermore, in addition to the air cooling method of the battery cooling system, a water cooling type cooling method in which water is injected as a coolant into the empty space between the fine tube accommodating the battery and the auxiliary filling tube, and heat storage and heat exchange In order to further improve the effect, a phase change material cooling method in which a phase change material such as paraffin or an ionic compound is injected, and forced blowing of the auxiliary filler tube with an axial flow blower, heat exchange between the fine tube and the auxiliary filler tube Based on the air-cooled cooling method that emits heat to the outside atmosphere by using it as a heat sink of As a cooling method, cooling efficiency can be improved.

And without storing the series motor, which is a vehicle driving source, inside the double sinusoidal hollow tube on the central axis in the vertical axis direction, three, four, five, four, three of the fine tube 100 are stacked in the horizontal direction. In addition, 19 battery modules are added by concentrating a plurality of auxiliary filling tubes in a hexagonal grid shape, and a radial motor or an in-wheel inside the wheel as an electric vehicle power source in the bonnet on the front wheel side of the chassis frame and the trunk part on the rear wheel side An in-wheel motor can be installed externally to the chassis frame. At this time, the power train of the radial motor includes a dashboard seating part, a seat seating part, and a power system fixing part using the reinforcing bead part and the rim beam on the wheel drive shaft as support points, the motor part, the wheel drive shaft, The differential gear part, the steering device and the suspension device are placed, and the support part of the in-wheel motor installed inside the wheel is inserted into the cylindrical cylinder at 8 places inside the reinforcement bead part of the steering and suspension device seating part of the chassis frame. to secure a support point, and fasten the bead nut parts arranged in three rows on the upper and lower sides with bolts to support the motor and steering and suspension devices, and to provide the driving power line and the inlet and outlet parts of the cooling system to provide an in-wheel motor (in-wheel motor). motor), the battery unit as an energy source accommodated inside the fine tube, the fine tube, the auxiliary filling tube, and a frame using the outer layers on both sides as a heat sink are integrated into one chassis, and the motor unit as a power source is a chassis It can be installed externally.

In addition, the position formed by the vertical double sinusoidal hollow tube formed on the floor pan of the flat undercarriage, the reinforcing bead part and the edge beam in the horizontal direction, and the concave-convex type yaw (凹) A receiving pad or a car pad, which is a wireless charging current collector for a vehicle, is placed in the space, and the car pad has a circular secondary side current collecting coil arranged in a hexagonal grid to form a charging pad on the ground or 1 of a power supply line on the road. It is possible to provide a wireless power transfer circuit for charging a battery cell or driving a motor by receiving electric energy as an electromagnetic wave by forming an electromagnetic circuit with the vehicle power supply coil. At this time, the thickness of the car pad is not more than the protrusion height of the cross-section of the bow-shaped cross section of the bi-sine wave hollow tube and the reinforcement bead part, and the fixing of the car pad is a plurality of bead nut parts arranged in three rows in the reinforcement bead part. It is fastened with bolts, and the wiring cable of the car pad is accommodated inside the cylindrical cylinder of the reinforced bead part, and is drawn out into the outer space of the rim beam that circles the outside of the chassis. Wireless power connecting the charging circuit part and the main distribution exchange system A transmission system may be provided.

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Hereinafter, preferred embodiments of the present invention will be described in more detail along with a theoretical background with reference to the accompanying drawings.

Theoretical background

Car weight has a decisive effect on performance, mileage, cost, etc., and rolling resistance (Frr, rolling resistance, Frr=μrrmg, μrr: rolling resistance coefficient, m: mass, g: gravitational acceleration- 9.8m/sec²) It is independent of the speed of the vehicle and is proportional to the weight (m) of the vehicle.

In addition, since both the slope climbing force (Fhc, hill climbing force, Fhc=mgsinθ, θ: climb angle/inclination angle) and acceleration force (Fla, linear acceleration, Fla=ma, a: acceleration) are proportional to the weight (m), it is important to minimize the vehicle weight. Automotive structures, especially frame and chassis designs, must be material-mechanically optimized, taking into account conflicting requirements such as cost, strength, stiffness, or performance and energy efficiency.

In consideration of the material mechanical properties, the present invention adopts an ultra-light fine tube as the material and shape of the intermediate layer and utilizes it as a frame constituting an automobile chassis to save materials and reduce weight while providing high-strength and high-strength properties. While expressing the characteristics of high-rigidity, by accommodating the battery 120, which is the energy source, in the concentric tube 100 that is widely distributed, the risk of heat generation and explosion of the battery is minimized and a structural shape that does not require a separate battery installation space is to manifest.

In order for a member or mechanical element of a structure to economically express its desired function, external force acting on the body/material or internal force, which is a force that resists load, and It should have strength and stiffness corresponding to strain. Strength is related to the intrinsic properties of the material and rigidity is dependent on the properties and geometry of the material.

When the chassis or frame of a car is divided into micro sections, it has the same characteristics as a beam, which is a horizontal member that has four supports and receives a vertical load. , they must be supported or coupled so that rigid body displacement does not occur.

In addition, it mainly receives static load, which is an external force (load) in the direction perpendicular to the axis line at rest, and dynamic load during movement, resulting in tension, compression, bending and shearing, As a structural member in which torsion and warping actions occur, the stiffness (stiffness) at a given material strength depends on the geometric condition of the material.

First of all, the established theory of material mechanics related to beams is that as a given amount of material is farther from the neutral axis, the section modulus (S) increases, and as the section modulus (S) increases, resistance can be resisted. Shear force (V) and bending moment (M), which are stresses (stress, σ, σ=P/A, P=σA, P; resultant stress, A; cross-sectional area), are increased.

The formula for the physical quantity related to the main shape of the beam and the material forming the chassis, which is the structural frame of an automobile, is as follows.

<Shear formular related to the main beam>

<Section modulus (S, section modulus) and relative efficiency>

1 is an illustration of the cross-sectional modulus and relative efficiency of various beam shapes utilized in the present invention. The cross-sectional shape of an ideal beam at a given cross-sectional area (A) and height (h) is half of the area on the neutral axis. The shape placed at /h is given as moment of inertia (I) I=Ah²/4, and section modulus (S, section modulus) S=0.5Ah, but these beams are physically impossible to implement.

1 illustrates the cross section of the entire chassis 10, the standard WF beam is the edge beam 106, the hollow cone beam is the fine pipe 100 and the auxiliary filling pipe 101, and the open cross-section beam is the channel beam 109. The chassis portion 10 is formed as a utilized member, and the given section modulus (S) and moment of inertia (I), as well as the shape and characteristics of the beam, are specified and the material and use are specified and the geometric shape that can improve strength and rigidity improvement should be found.

Based on the above formula and the shape of the main beam, the cross-sectional shape is the most important design factor that can be derived to obtain high strength and shear stress τ when designing the chassis, and the thickness (t) of the intermediate layer is reduced by wrinkling and buckling. Shape design and design of the chassis 10 by making it thin within the range where buckling does not occur and locating it at the farthest point from the origin O of the neutral axis 107 of the material to come up with a geometric shape that can obtain the maximum bending stress should be reflected in

The most efficient beam mainly depends on the shape of the section, and the shape furthest from the neutral axis 107 of the material is essential. /c, c: distance) increases and the section modulus increases, the stress resultant, which is the resultant force of shear force (V) and bending moment (M), which is a stress distributed over the cross section, increases.

In the present invention, the chassis 10, which is the structural frame of the automobile, is manufactured as a sandwich beam or panel of a three-layer structure (outer layer + middle layer + outer layer) in order to find a beam having a shape close to the ideal beam, but the outer layer 103 is a steel sheet made of high-strength material , an aluminum plate, etc., the intermediate layer 102 is a hollow circle in which the bending stress acting on the cross section occurs at the farthest from the neutral axis and the shear stress supporting the torsional load is near the outer boundary of the cross section. The tube 100 is adopted as an intermediate layer (core) (102).

The sandwich beam having the three-ply structure (outer layer + middle layer + outer layer) has a much larger modulus of elasticity (E) than the material of the core (102), which is the outer layer (103) of the frame or chassis (10). The bending stress is located on the surface that is the furthest from the neutral axis 107 of the material, and the shear force is widely distributed to the surface of the concentric tube 100, which is the thick core 102, so that the sandwich beam with high rigidity and high strength. The function of beam) is expressed.

The sandwich beam having a three-layer structure in which an outer layer + an intermediate layer + an outer layer is formed with two linear elastic materials, the intermediate layer 102 and the double-sided outer layer 103 of the fine tube 100 having the double symmetrical cross section, the thickness of the outer layer (tface) of the middle layer Since it is small compared to the height Hcore, the outer layer 103 supports the entire longitudinal bending stress, and the intermediate layer 102 approximates an ideal beam supporting most of the shear stress.

A sandwich beam that approximates an ideal beam is a composite beam in which more than one material is joined, saving material and reducing weight, while maintaining high-strength related to the intrinsic properties of the material, and high-strength related to the properties and geometry of the material. As it has a related high-rigidity characteristic, it is widely used in the aviation and space industries and everyday items such as skis, doors, wall panels, and paper cardboard boxes in everyday life.

Sandwich beams are separated by two thin outer layers (103) of a non-rusting, relatively high-strength material and a thick core (102) of lightweight, low-strength material, and have honeycomb structure and corrugation as well as light weight. of plastics and foam are commonly used for the intermediate layer 102 .

In consideration of the above material mechanical properties, the present invention adopts an ultra-light fine tube 100 as the material and shape of the intermediate layer (core) 102 to save materials and reduce weight while expressing the characteristics of high strength and high rigidity. On the other hand, by accommodating the battery 120, which is an energy source, in a widely distributed concentric tube 100, the risk of heat generation and explosion of the battery is minimized, and a structural shape that does not require a separate battery 120 installation space is realized.

At this time, by inserting the auxiliary filling tube 101 in the empty space between the fine tube 100 and the space between the fine tube 100 and the outer layer 103 on both sides, flat dispersion of shear stress τ, improvement in torsion and bending strength, wrinkling ) and the space for buckling, which is an axial displacement, to express high rigidity characteristics, while the space between the fine tube 100 and the auxiliary filling tube 101 is the air flow path of the battery cooling system 14 . It is used as a cooling air oil pipe (140).

Calculation of the shape dimension of the auxiliary filling tube 101 is the osculating circles, or "kissing" circles) of three circles (a, b, c,: the radius of the inscribed circle) or the Soddy circle (radius x). When the solution of the Descartes' equation for the size is obtained, the radius x of the auxiliary filling tube 101 can be obtained, and detailed numerical values will be described in the Examples.

The fine tube 100 and the auxiliary filling tube 101, which are intermediate layers 102 formed of bundled tubes, are fillers and serve as a support role for stabilizing the outer layer 103 against wrinkling or buckling, As a characteristic of geometrically increasing the height (h) of the web (h) of the standard WF beam by π times, the section modulus (S) of the fine tube 100 and the auxiliary filling tube 102 is larger than that of the WF beam (0.35Ah), and the physical It has 0.4614Ah, which is close to 0.5Ah, which is the section modulus (S) of the ideal beam, which is impossible to achieve with this.

For example, the section modulus (S) of a standard WF beam is about 0.35, and the section modulus (S) of an ideal beam is given as 0.5, so the ratio becomes 0.7 (0.35/0.5), according to the present invention The tubule, which is the core of the , geometrically increases the length π times that of the web of a standard WF beam. If we obtain the increased section modulus (Sx) of the fine tube, it is 0.1114 [π*Sx/0.5=0.7, Sx=(0.5*0.7)/π = 0.1114], so the section modulus of the flat chassis ( Sx) has a value between at least 0.35 (when t is thick) and up to 0.4614 (0.35+0.1114) depending on the geometric shape (thickness of the fine tube, bonding method, etc.) It has an improved section modulus.

This trinity type automobile structural frame is named “flatform chassis” (10), and when the battery 120, which is a large-capacity energy source, is stored in the concentric tube 100, it is unnecessary to secure a separate installation space and The material and the center of gravity of the chassis 10 are lowered below the origin (O) of the wheel drive shaft 108 to secure stability, while increasing the moment of inertia to volume (I) and shear stress such as tension, torsion, bending, compression, etc. and material cost Savings and freedom in vehicle design can be secured.

Example 1, “Standard type” flat undercarriage shape

A first aspect of the present invention relates to a standard cross-sectional shape of a chassis that is a frame for a vehicle structure. and a cross-sectional view, Fig. 5 is a cross-sectional view of a flat undercarriage and a vertical edging beam (line A), Fig. 6 is a cross-sectional view of a flat undercarriage horizontal edging beam (line B), and Fig. 7 is a cross-sectional view of a flat undercarriage reinforcement bead, Fig. 8 illustrates a cross-sectional view of a flat undercarriage motor unit.

In the following terms, the flat chassis 10 collectively refers to the integrated chassis 10 in which the battery unit 12, the motor unit 13, and the structural frame of the vehicle are integrated, and the frame is a fine tube 100 in which the battery is accommodated. And the middle layer (core) 102 of the auxiliary filling tube 101, the bi-sine wave hollow tube 106 in which the motor part is accommodated, the reinforcement bead part 105, the both-side outer layer 103, and the member of the edge beam 106 It means the basic skeleton or frame for the trinity-type structure to be formed.

In other words, the flat chassis means an integrated chassis in which the battery and motor, which are powertrains, are housed and stored, and the frame is a substructure of the chassis and is a simple basic framework without a powertrain. It means a structure formed by the member of the auxiliary filling pipe, the double sinusoidal hollow pipe, the bead part for reinforcing, the outer layer on both sides, and the edge beam.

The vehicle structure such as the chassis 10 withstands the bending stress, which is the result of the compressive force at the top of the vehicle and the tensile force at the bottom, and factors such as the shape of the vehicle structure, the material used, the load supported, the surrounding environmental conditions and cost, and the vehicle's Because it is desirable to have a minimum cross-sectional area to minimize weight and save material, the geometry of the cross-section is of utmost importance in designing a chassis after all.

In general, the chassis (chassis) is the rest of the body except for the powertrain, steering system, suspension, and drive shaft, as well as the main accessories including the drive shaft and the frame manufactured to support them. Strength and rigidity that can sufficiently withstand bending, torsion, vibration, etc. by

The automobile chassis 10 has the same function as a beam in material mechanics, such as shear force, bending moment, stress, strain and deflection ( deflection), etc., to come up with an optimal frame shape (sun) and manufacturing method with idealized modeling, and to provide means for practical industrial use.

The shape of the basic frame of the present invention is to focus the hollow concentric tubes 100 in a horizontal plane in a multi-stage hexagonal grid shape of three or more stages, and the space between the concentric tubes 100 is more tightly reinforced with the auxiliary filling tube 101 It forms a thick core 102 of a bundle type, and the material mechanical section modulus (S) is about 0.4614 Ah, which is larger than 0.35 Ah of standard WF beam and close to 0.5 Ah of ideal beam. Sandwich beams that exhibit high rigidity characteristics can be realized.

The hollow fine tube 100 forming the thick core 102 is lightweight and relatively low-strength aluminum with a thickness of 1 t (t = 1 mm) or less, stainless steel, plastic or carbon fiber, etc. It is possible to use the economical and widely used tube made from the material of

The method of forming the intermediate layer 102 is a method such as a bonding agent, soldering (bond), welding (welding), etc. when the fine tube 100 is focused in three or more stages in a hexagonal lattice shape. When manufactured and used as the intermediate layer 102 of the chassis 10, which is a frame for automobile structure, the same characteristics as the filler of sandwich beams are expressed, thereby stabilizing the both-side outer layers 102 from wrinkles or buckling.

A more improved mass production method is a basic frame manufacturing process of double symmetrical cross-section (y, z-axis) including a double sinusoidal hollow tube 104 housing the serial motor unit 130 of Example 3, using molten aluminum as a shape mold ( The manufacturing method of die-casting, extrusion processing, or injection molding with engineering plastics, which is press-injected into dies), is a manufacturing method that can mass-produce a solid intermediate layer, the intermediate layer 102 By improving the geometry of the chassis, it is more desirable in terms of productivity because it increases the rigidity of the chassis and eliminates the bonding process.

On the other hand, if the surface of the chassis 10 is made of a high-strength material and a stainless steel plate that does not rust is 2 mm or more, and an aluminum alloy plate or an engineering plastic plate is 4 mm or more, when the both-side outer layer (face) 103 is formed, the material is the farthest from the neutral axis Because it is located at a distance, the bending stress is maximized, and the shear force flows to the surface of the multi-focused concentric tube 100, which is a thick core 102, and is widely distributed, so that the function of a sandwich beam is expressed.

In the above structure, the both-side outer layer (face) 103 is located at the furthest distance from the neutral axis 107 of the material and has the function of the outer layer of the ideal beam in which the bending stress is maximized, and is hollow ( The hollow fine tube 100 acts as a filler, which is the intermediate layer 102 , and acts as a support layer to suppress wrinkling or buckling of the outer face 103 . A plurality of standard cylindrical batteries 120 are accommodated by constituting a frame or platform.

In addition, on the longitudinal central axis of the chassis 10, a positive sinusoidal hollow cylinder 104, which is a hollow corrugated cylinder, is placed and a motor as a power source By storing the unit 13 inside the frame, the battery unit 12 as an energy source, the motor unit 13 as the power source, and the chassis unit 10 as the structural frame of the vehicle are integrated into one trinity-type integrated flat undercarriage (10) provides

The double sinusoidal wave hollow tube 104 is a full wave rectification (full wave) in which the graph repeats when the value of x changes from 0 to π in the ridge of a sinusoidal wave, that is, y = sin(x). When a corrugated pipe with a rectifier shape is adopted, the torsion or bending strength is further improved mechanically, and wrinkles and buckling are prevented with a cross-sectional area that is π times larger than that of a flat pipe compared to the same volume, and improved tension, torsion, and It is possible to improve the bending and compressive strength, the details of which will be detailed in Example 3.

At this time, a positive (+)-shaped bead is added by adding a reinforcement bead portion 105 in the transverse direction orthogonal to the vertical direction, which is the arrangement direction of the bi-sine wave hollow tube 104 and the fine tube 100 as the intermediate layer 102 . When the part is formed, the compression and tensile strength of the lower part of the chassis 10 are increased to increase the flexural rigidity to resist bending stress in the transverse direction (z-axis). It is possible to further reinforce the rigidity of the chassis 10 that supports the external load and load, and its position is placed on the front wheel drive shaft 108, the rear wheel drive shaft 108, the front and rear seat rest 117, etc. .

The reinforcing bead part 105 is a member having a circular segment-shaped cross section, which is a figure consisting of a line segment connecting two points on a circle and an arc connecting the two points, in the longitudinal direction of four cylindrical cylinders, and By providing a three-row four-hole structure consisting of three rows of joint parts having a plurality of bead nut parts in three rows in the longitudinal direction, the inside of the upper and lower bead parts for joining the car body (body) and accessories 8 A hollow cone shape beam is inserted into the cylindrical cylinder 105a at a certain point to secure a supporting point, and a plurality of bolts are fastened to the bead nut parts 105b arranged in six rows of upper and lower parts to join them.

In the double three-row four-hole fastening method of securing the support points in the six rows of bead nut parts 105b and the eight cylindrical cylinders 105a, a fastening device such as a pin or bolt passes through the fine tube 100. Improvement in which the stress concentration and local stress generated in holes or notch can be distributed over the entire surface of the chassis 10 via the arch-shaped double-sided outer layer 103 and the reinforcement bead 105 In this way, the location of the wheel drive shaft 108, the front wheel 113, the rear wheel 114, the steering and suspension device 115, the dashboard seating part 116, etc. where the load and bending stress are concentrated is preferable.

The reinforcing bead part 105 applies a load and a bending stress by reinforcing the intermediate layer 102 of the longitudinal fine concentric tube 100 in the transverse direction, thereby reducing the load and bending stress to the double-sided outer layer 103 and the reinforcing bead unit 105 and the fine tube 100 . ), evenly dispersed and supported, and when the entire intermediate layer 102 is bonded from both sides by processing the plate material as the outer layer 103 to be curved, the chassis part, which is a frame for automobile structure, expresses the characteristics of a sandwich beam of the outer layer + middle layer + outer layer. (10) is formed.

The plate material, which is the double-sided outer layer 103, is a material that can maintain high rigidity while maintaining weight reduction, but corresponds to the shape of the bi-sine wave hollow tube 106 and the reinforcing bead portion 105 to further increase the rigidity of the plate structure. The strength of the structure is increased by increasing tensile or compressive stress, bending stress and shear stress by putting a bead to High-strength) and high-rigidity sandwich beams are formed.

In addition, the edges of the front, rear, left and right sides of the chassis portion 10 are material-mechanical in the form of a WF beam (wide flange beam) having a section modulus (S) of 0.35 Ah, a flange that resists bending stress and a web that resists shear stress. ) having a frame beam 106, but the longitudinal both sides outer layer 103 of the left and right sides of the frame is inserted into one side of the vertical edge beam 106A, and the flange of the frame beam 106 and the double-sided outer layer of the frame ( 103) is joined by welding 158, but the edge of the chassis 10 is reinforced by finishing with fillet weld, plug weld, lap weld joint, etc.

The other side of the vertical edging beam 106A into which the frame is not inserted is a rivet without residual deformation for the wheel drive shaft 108, the steering and suspension seating part 115, the fender part and the body support part 11, etc. ), bolts 157, welding 158, etc. to join the vehicle body (body), but utilize the reinforcement bead portion 105 having three rows of bead nut portions 105b and four cylindrical cylinders 105a. The hollow cone beam is inserted into the cylindrical cylinder 105a of the upper and lower eight places to secure the support point, and a plurality of bolts are fastened to the bead nut part 105b arranged in six rows of upper and lower parts to connect the double three rows of four holes. It is desirable to distribute the load and bending stress widely by joining the attachments and the car body (body) through the fastening and joining.

Since the outer empty space 106x between the flange and the web of the vertical edge beam 106A has a shape that goes around the chassis 10, various electric devices 126 and charging sockets of the vehicle body (body), etc. When used as a necessary wiring or piping space, and by reinforcing and finishing an open cross section beam or a U-shaped channel beam 109 that is a profile sectionns, the structural frame of the electric vehicle, the chassis 10 The vertical left and right side parts can be completed.

On the other hand, the horizontal edge beam 106B before and after the frame to which the fine tube 100 is terminated is the bonnet and the front bumper seating part 118, the trunk and the rear bumper seating part 118, the battery part 12 and the module outlet 124 ), a space constituting the wiring and pipe network such as the cooling air oil pipe 140 and the air intake 141 and the air exhaust port 142 of the cooling system 14, by extending the flange portion of one side of the frame beam 106 The inner space 106z between the flange and the web of the horizontal edge beam 106B is connected to the outer layer 103 on both sides of the frame to secure the support. to the main power distribution exchange system 125 or the electric device 126, etc. by converging the +/− terminals from the battery socket 122, the battery module 121, and the battery outlet 123 to a power circuit. By configuring the , wiring or piping does not protrude out of the chassis.

Since the outer space 106y of the horizontal edge beam 106B has a shape that goes around the outside of the chassis 10 together with the outer space 106x of the vertical edge beam 106A, a charging socket, a light device, a lighting device, a gauge , horn, sensors, wipers, air conditioners, etc. are used as a space for wiring (harness cables) or pipes (ducts) that drive electric devices, and after placing cables and pipes in the outer space (106x) between the flange and the web When the U-shaped channel beam 109 is added, two or more materials are combined to form a build-up beam.

Since the flange and the web of the edge beam 106 and the flange and the web of the channel beam 109 are joined by bolts 157, welding 158 or rivets to form a box beam, the shear flow It is more preferable to disperse the edge beam 106 and the channel beam 109 to all cross sections to resist bending stress and shear stress, and to prevent cables and pipes from being exposed to the external environment.

Reinforcement of the member reinforcement of the bead portion 105 and the WF beam-shaped edge beam 106 and the channel beam 109 orthogonal to the horizontal direction is transmitted through pins or bolts when mounting the vehicle's accessories to the chassis. It distributes the local stress of the stress concentration generated in the notch (keyway, stepped part, etc.) and the hole to the entire surface of the chassis 10 to prevent fatigue failure or progressive failure. It is a useful means to prevent fracture) and provide a joint to fix the chassis (body).

The behavior of the vehicle structure depends on the properties of the material and the characteristics of the load. A static load that acts for a long time gradually and changes slowly, an impact load that is suddenly applied or removed, and a continuous load that is applied for a long time. There is a dynamic load of repeated load, which is a load that repeatedly acts for several cycles by changing its strength.

Impact load is a load that occurs when a vehicle collides with a stationary structure or when a vehicle collides. During the impact, energy generates heat and causes local plastic deformation, and holes and grooves that cause stress concentration. Structures of the same shape are very weak to impact, and when subjected to static and continuous repeated loads, even if the material itself is ductile, it may break with a minor impact.

When the shape dimensions of the flat chassis 10 are calculated based on the 21700 standard cylindrical battery cell 120 with reference to FIGS. 2, 5, 6, 7, and 8, the fine tube 100 in which the battery is accommodated has an outer diameter of -25 mm (R = 12.5mm), inner diameter-23mm, thickness -1mm, the height of the intermediate layer 102 of the fine tube 100 integrated in three layers is a hexagonal grid-type integration height (R*1-[(√3-1)]) Subtracting 6.6987mm (3.3493mm*2) from the height of 75mm (25mm*3) of the three-layer fine tube, 68.3012mm (75mm-6.6987mm) is taken as the height (hcore) of the middle layer, and the requirements for the chassis, which is a frame for automobile structure Depending on the configuration, multi-stage focusing may be performed in 4 stages, 5 stages, or more, but in this embodiment, 3-stage stacking is used as a standard.

의 데카르트 방정식의 해x를 구하면, 세심관(100)과 세심관 사이의 보조 채움관(101)은 외경 3.86mm, 세심관과 바깥층(직선: 곡률 0) 사이의 보조 채움관은 외경 6.25mm, 세심관(100)과 테두리 비드부(106)의 웨브에 연접하는 보조 채움관(101)은 외경 12.5mm를 표준 형상치수로 삼는다.On the other hand, in the case of the auxiliary filling tube 101

To find the solution x of the Cartesian equation, the auxiliary filler tube 101 between the constriction tube 100 and the constrictor tube has an outer diameter of 3.86 mm, and the auxiliary filler tube between the confinement tube and the outer layer (straight line: curvature 0) has an outer diameter of 6.25 mm, The auxiliary filling tube 101 connected to the web of the fine tube 100 and the edge bead portion 106 has an outer diameter of 12.5 mm as a standard dimension.

The double sine wave hollow tube 104 housing the motor unit 13, which is the power source, is more than twice the size of the intermediate layer (core) 102 height 68.3012 mm (hcore) and the outer diameter radius of the series motor 130 (60 mm) and the impact A hollow shaft series motor 130 by placing a double sinusoidal hollow tube 106, a hollow corrugated tube with 36 corrugations, with an outer diameter radius of 72 mm plus the insertion space (10 mm) of the insulation pad 139 and the thickness of the corrugated tube (2 mm). ) is stored.

The shape dimension of the reinforcing bead part 105, which is a member having a circular segment-shaped cross section, is 37.8494mm, which is the distance between the outer diameter radius (72mm) of the hollow tube and the intermediate layer 102 based on the central axis 107 of the material. If it has a protrusion height of (72mm-34.1506mm) and is substituted into the formula to obtain a circular segment, the length of the chord (a=2√R²-r²)-126.77mm, the length of the arc (S= Rθ) - 155.03 mm, angle - 123.37 ° and has dimensions of the intermediate layer (core) (core) 102 and orthogonal to the direction to reinforce the chassis portion (10).

And the plate material of the double-sided outer layer 103, which is the surface of the intermediate layer 102, is 2 mm or more when the material is stainless steel, and the aluminum alloy plate or engineering plastic plate has a value of 4 mm or more. The basic chassis panel is formed by forming or press working into a curved shape corresponding to the shape of the reinforcing bead part 105 and bonding with the thick intermediate layer 102 by welding or the like.

The WF beam-shaped edge beam 106 located at the edge of the flat undercarriage 10 has a flange that resists bending stress and a web that resists shear stress. More than, 10mm or more in case of aluminum, 100mm or more of the width of the flange, but 100mm or more if the material is stainless steel, 150mm or more if the aluminum material, and the height of the web is 72.3012mm or more if the material is stainless steel, 76.3012mm or more if the material is aluminum It is desirable to have dimensions.

Summarizing the preferred embodiment of the flat undercarriage 10, the core 102 of the multiple concentric tubes in which hollow concentric tubes 100 with a thickness of 1 mm or less are integrated in a three-layer hexagonal lattice in a horizontal plane [H: 68.3012mm] and the auxiliary filling tube 101, a double sinusoidal hollow tube 104 [D: 144mm] that stores the serial motor 130 as a power source on the longitudinal central axis, orthogonal to the hollow tube and the fine tube 100 ( +) to form a sandwich panel in which the plate material of the outer layer 103 on both sides becomes the face of the bead portion 105 for reinforcing in the transverse direction.

Then, the panel edge portion is finished with a WF beam-shaped edge beam 106 to complete the standard chassis portion 10, and the height (thickness) of the sandwich panel portion at this time is 72.3012 mm or more, and the height of the motor portion and the reinforcing bead portion The (thickness) is 148mm (144mm+2mm+2mm) or more, and the height of the bow-shaped part protruding from the panel becomes 37.8494mm, which resists the upper and lower compressive stresses of the chassis and provides a joint to fix the body (body) do.

Example 2. Battery module mounting method and main distribution exchange system (MDSS)

Example 2 is a configuration diagram of the battery part of FIG. 9 and FIG. 10 showing an embodiment related to the assembly and mounting method and power distribution exchange of the battery module 121, which is an energy source, mounted on the fine tube 100 of the basic sandwich beam of Example 1 The shape diagram of the socket and outlet of the battery part is enumerated with reference to the main distribution and exchange system (MDSS) block diagram of FIG.

The present invention is a battery of a method of serially storing 21700 standard cylindrical battery cells (21mm * 70mm) 120 with high cost competitiveness and high capacity characteristics in mass production in the fine tube 100 that is the middle layer 102 of the chassis 10 The module 121 is configured, and at this time, the battery socket 122 is provided, the individual battery cells 120 are mounted in the battery socket 122 , and a safe storage method is adopted in which the socket is accommodated in the fine tube 100 .

Rechargeable batteries, which account for about 40% of the cost of an electric vehicle, determine key performance such as mileage and output, monitor the battery status, manage charge and discharge management functions, balancing functions, and protect against abnormal situations The system (BMS, Battery Management System) 129 is a technology that improves efficiency and secures functional stability through optimizing the battery state, and is very important in the field of electric vehicles and power storage systems (ESS).

In addition, in order to improve the performance and safety of the vehicle system, the vehicle system is configured more simply, and the redundancy ( It is necessary to ensure longevity and safety.

The mounting method of the battery module 121 specified in the present invention considers charging, replacement, or additional installation, and the side side battery storage spaces 112 are utilized as a basic storage space, a base power module. And, the center side battery storage space 111 is used as a module for intermediate power or peak power that can be detached from time to time.

The cut of the fine tube 100 housing the battery cell 120 is an outer diameter of 25 mm (inner diameter 23 mm), an aluminum, stainless steel or plastic tube having a thickness of 1 mm, and the battery socket 122 is an outer diameter of 22.5 mm (inner diameter 21.5 mm), A method of forming the socket lead wire 159 by providing the socket lead wire 159 in the form of a negative (-) terminal strip on the inner diameter surface of a non-combustible plastic material having a thickness of 1 mm or by applying a thin copper film between two thin tubes is preferable. , constitutes a battery module 121 circuit connected to the main distribution exchange system 125 through the battery outlet 123.

Since the configuration of the battery module 121 is different in the axial direction of the chassis as shown in FIG. 3, the battery module is configured by dividing the center side battery storage space 111 and the side battery storage space 112, and the battery module 121 In the method of accommodating the battery in the fine tube 100, which is the middle layer of the chassis 10, the front and rear horizontal edge beams without disassembling or disassembling the chassis (undercarriage) or body (undercarriage) for charging, replacing, and checking the battery. By disassembling only the 106B and the channel beam 109, the inventive step can be performed conveniently.

In particular, the battery module 121 of the center-side battery storage space 111 used as a module for peak power can be detached more easily. 109) is equipped with an optional detachable inlet equipped with a locking device to enhance the convenience of adding and replacing batteries and providing after-sales services after the vehicle is shipped, and battery charging is performed by detaching and detaching the module 121 unit or charging exchange service business model can be introduced.

At this time, the inlet for detaching the battery module 121 connects the module outlet 124 and the module plug 128 of the same size as the diameter of the battery module 121 to the web 156 of the front and rear edge bead parts 106B of the web. If it is manufactured in the same thickness as the nut and bolt type and has a screw type fastening structure, the battery module 121 is accommodated and then the stopper 128 is backfilled into the module outlet 124 of the web. improve the stress concentration of

The battery module 121 is connected to the power management system 125 and the power management system 125 and the positive (+) and negative (-) terminals of the battery socket 122 and the battery outlet 123 in a concave-convex shape. It is connected to the power source in this way, and the individual outlets 123 are connected to the Main Distribution & Switching System (MDSS) 125 of the power supply, and the battery management system (BMS) 129 and the central processing unit (CPU) are connected. It is desirable to control charging and discharging, circuit breaking, and sensing of sensor signals (temperature, overcurrent, overvoltage, etc.) for each module.

If the battery module 121 of the present invention is calculated based on a standard medium-sized passenger car and a 21700 standard cylindrical battery (21mm*70mm, 3.7V, 4.5 Ah), the battery module 121 of the center-side battery storage space 111 is 102 With one module (34 modules * 3 layers, 102 * 42 cells = 4,284 cells), the output voltage is 155.4V (42 * 3.7V) by serial connection of 42 cells (300Cm/7 = 42 cells) per module, The battery module 121 of the side battery storage space 112 has 72 modules (12 modules * 3 layers * 1 left and right, 72 * 26 = 1,872 cells), and 26 cells (182 cm / 7 = 26 cells) per module. ), the output voltage is 96.2 V (26 cells * 3.7 V), and the power supply consists of a total of 174 (102+72) modules and 6,156 (center - 4,284 + peripheral - 1,872) unit cells. It has a capacity of up to 102.497 kWh (6,156 units * 3.7V * 4.5Ah), so it has a driving range of 512 km at 5 km driving per 1 kWh and 820 km at 8 km driving.

The main distribution switching system (MDSS) 125 is a two-way power conversion (Matrix Switching) function that is a matrix converter circuit (matrix converter circuits) of N × M switch elements by connecting N input and M output lines by a switch. It is desirable to configure a power semiconductor device (PSD) with a power semiconductor device (PSD) to increase the switching speed, increase the output by driving high voltage and large current, and simplify the control circuit.

The main distribution switching system (MDSS) 125 opens and closes a switch element with a control command from the vehicle's battery management system (BMS) and central processing unit (CPU) to configure charging and discharging of individual battery modules, and a series-parallel circuit. Parallel operation of two (A/B) redundant duplex systems for safe operation of automobiles as a core element constituting the motor driving power and regenerative braking function and the power supply circuit of various electric devices It is more preferable to operate as a Fault Tolerant system of the in tandem method.

The actual industrial application of the main distribution exchange system (MDSS) 125 is a battery module 121, a charging circuit unit 127, a motor unit 13, an inverter and a converter, smart car infotainment, a steering device, a braking device. , an accelerator, a lighting device, a dashboard, an autonomous driving system, a battery management system (BMS), a vehicle central processing unit (CPU), etc. It functions as a distribution box that provides transfer connection and maintenance connection points of the power circuit, and controls the individual battery modules 121 through data communication with control systems such as CPU and BMS.

Considering the long lifespan of an automobile and the fact that charging and discharging occur frequently during the life cycle of the battery, the battery module mounting is physically separate operation for each module (e.g., designating the discharging sequence for each module, designating the battery module for regenerative braking) etc.), a well-designed main distribution and exchange system (MDSS) 125 is an important element technology that can extend the life of an expensive battery by reducing the number of charging and discharging of the battery cell 120. It can be used as a tool to reduce the cost of ownership (TCO).

For example, if the motor 13 drive and the power supply of the electric device 126 are sequentially assigned to the discharge circuits such as the motor and the electric circuit for each module in series, the number of times of battery discharge is greatly reduced and overdischarge and overcharge are controlled for each battery module 121. Since it is possible to protect the battery cell 120 compared to the parallel allocation method, it is possible to significantly extend the life cycle of the battery cell 120 .

In addition, even during charging, only the discharged module is connected to the charging circuit unit 127 to greatly reduce the number of repeated charging and extend the battery cell 120 lifespan of each module, thereby reducing OPEX (Operating Expenditure) cost and vehicle ownership. It can reduce the total cost of ownership (TCO) and reduce the time required for fast charging and slow charging, thereby reducing driver discomfort and enhancing convenience.

Currently, 82% of drivers have an average daily driving distance of 64 km, and 51% are within 30 km. Considering the battery capacity and the speed of technological development, it can be predicted that the proliferation of BEVs or PHEVs will accelerate if only charging infrastructure is equipped, so the removable battery of the present invention The module 121 and the mounting method may combine the expensive battery cells 120 into ultra-short-distance, short-range, medium-distance, long-distance, and ultra-long distances according to the driver's demand.

In addition, the distribution channel that separates the car and the battery (battery) dramatically lowers the initial purchase price of the car, thereby reducing the cost burden by purchasing or renting additional batteries if necessary. The battery module mounting method, which can be detached by renting or exchanging charged batteries, can be adopted in various business models such as dramatically shortening the waiting time for charging.

Example 3. Mounting method of a (series) motor unit as a “power source”

Embodiment 3 relates to a motor unit 13 stored on the central axis of a “flatform chassis” 10 of Embodiment 1. Fig. 8 is a cross-sectional view of the motor unit, and Fig. 12 is a series A motor unit mounting shape diagram, FIG. 13 exemplifies the shapes of the matching gear unit and the differential gear unit.

The motor that can take full advantage of the advantages of the present invention is not a conventional conventional radial type motor, but a long-axis hollow shaft series with a relatively small diameter in which a rotor and a stator alternate along a central axis. The motor 130 is preferable, and a specific example thereof is “Patent Application No. 10-2017-0104227, a positive sinusoidal hollow shaft type series electromagnetic rotating body”.

The patented invention is a method that can solve the problems of the conventional electromagnetic rotating body technology, in which the rotor (Ro) and the stator (St) alternate perpendicularly to a hollow shaft or an air core shaft. Provided is a series electromagnetic rotating body.

In particular, by adopting a hollow shaft as a rotating shaft, it provides an open cooling system with a rotational body shape in the form of a virtual shaft from which a physical shaft is removed, and an open cooling system using the hollow shaft as a passage, and increases the moment of inertia (I) of the rotating body. It is the content that can improve the mechanical torque of the motor (induction machine) and the electrical energy output of the generator (synchronous machine), while improving economic efficiency by eliminating the high cost and heavy rotation shaft.

In a hollow shaft rotating body, the moment of inertia (I) in unit area (A) and mass (M) is increased by 11.11 to 25% compared to a solid shaft with a full body, and magnetic field lines are formed by configuring a magnetic closed circuit. The structure that links the coil unit in both directions has a factor of increasing output efficiency of 22.22 to 50%, and the following examples are listed based on the 6-pole type hollow shaft serial motor 130 having an outer diameter of 60 mm.

In order to utilize the hollow shaft series motor 130 as a power source, the double sinusoidal hollow tube 104 described in the flat chassis shape of the “standard type” of Embodiment 1 is placed in the storage space of the motor unit 13 . When it is placed on the central _axis of the chassis 10 as a , the function of a fully stressed beam having a bending stress is expressed to prevent wrinkles and buckling, and to exhibit improved tensile, torsion, bending and compressive strength.

The effective and appropriate design dimensions of the double sine wave hollow tube 104 can easily set the size of the wrinkles in radians if only the radius and number of wrinkles of the tube are determined. Calculated based on an integer multiple (6*N) of '6', but the number of corrugations is a bi-sine wave hollow tube 104 having 36 teeth by taking the N value as 6 based on a 6-pole motor. (13) is used as a storage space.

The 36-tooth negative sine wave concave grooves formed inside the hollow tube have 12 shock insulation pads 139, 12 motor coil guides, 6 water cooling system 148 pipes, and air cooling. Utilizing the space for accommodating 6 air exhaust ports 142 of the system 147, the motor unit 13 fastening, the wiring of the motor unit coil, and the cooling system piping are all installed in a hollow sine wave groove inside the hollow tube. Remove the separate fastening part, wiring and piping part by storing it in the .

If the diameter of the inner groove is 10 mm, the median radius value of the origin of the inner groove is 65 mm, and the length of one side of the regular 36 polygon circumscribed on the circumference of the inner groove is 11.3446 mm (2π * 65 mm/36), and the diameter of the inner groove ( D-10mm) and 1.3446mm as the value of the jaw width, which is the gap between the connecting wrinkles, a concave-convex groove having 36 teeth is formed on the outer diameter circumferential surface of the motor unit 13, and the fastening part and wiring and Piping space can be secured.

When 36 teeth housing the shock insulation pad, motor coil guide, water-cooled pipe, and air-cooled air exhaust port are formed in the circumferential length (2πR) direction to provide a concave-convex groove, the height of the teeth (groove) is 5mm in wrinkle radius It is more preferable to use it as a space to allow vibration of the chassis including the motor and wheels in the motor insertion process and by securing a 2mm gap between the motor part and the hollow tube teeth by setting the height to 4mm by removing 1mm from the motor.

When the serial motor 130 is housed in the sine wave hollow tube 104, it is a viscoelastic material that has excellent damping action and absorbs vibration and shock well. An insulating pad (isollator) 139 is provided, and the motor unit 13 is inserted into the space between the concave groove 138 and the positive sinusoidal wave hollow tube 104 inner negative sinusoidal wave concave groove to insert the motor unit ( 13), but the number of pads secures a total of 12 as shock insulation and support parts, one on each left and right of the motor part 13, water-cooled cooling system 148 pipe.

At this time, the thickness of the shock insulation pad 139 is provided with a cylindrical pad with a thickness of √2 times (1.4142) of a diameter of 10 mm (1 Cm) in a way to secure elastic compression capacity, and the yaw of the motor unit 13 The (凹) groove 138 and the positive sinusoidal wave hollow tube 104 are inserted into the negative sinusoidal wave groove to store the motor 13 in the positive sinusoidal hollow tube 104 and fixed to the chassis 10 to absorb vibration and shock. to attenuate

The pad fixing method is a tensile method that reduces the thickness of the pad by fixing one end of the pad and pulling it in the longitudinal direction. If the position of the part 13 is fixed, the motor part 13 can be easily fixed without parts such as bolts or wedges that cause stress concentration and shear, and the rotation vibration of the motor and the rolling vibration of the wheel are isolated ( isolation) to reduce the fatigue of the motor part and chassis structure due to vibration.

In addition, in order to form the power train of an automobile, when the rotation shaft of the motor orthogonal to the wheel shaft is connected, the high rotation speed of the motor and high efficiency driving force transmission and vibration, torsion, and bending of the wheels and the motor drive shaft are reduced. Appropriate gears and bearings should be provided.

The present invention uses a differential gear 136 that has proven reliability and can be mass-produced as a power transmission device that connects the motor drive shaft 137 and the wheel drive shaft 108, and improves the efficiency of power transmission and For the purpose of isolating and mitigating the vibration and external force of the wheel drive shaft 108, a matching gear part 132 comprising a double helical gear 133 and an auxiliary rotation shaft 134. ) is placed

When the matching gear unit 132 transmits power to a drive pinion (D) 135 that transmits power to a ring gear (G) of the differential gear unit 136, the torsion angle directions are opposite to each other. It is composed of a double helical gear 133 that removes axial load and external force by combining a pair of helical gears, and an auxiliary rotation shaft (Aux. , 114) to raise the origin O of the motor drive shaft 137, the reduction effect of a certain ratio, and the matching of the load impedance (Z) to increase the efficiency of driving the gear unit and reduce noise and vibration improve the quietness of

The differential gear unit 136 interlocked with the matching gear unit 132 is a power distribution device that varies the number of rotations of the left and right wheels when the vehicle is turning or when road conditions are poor. In the present invention, the drive gear outlet 131 is installed at a position where the series motor 130 and the wheel drive shaft 108 are orthogonal to each other, and the front wheel side, the rear wheel side, or the front and rear wheel sides as needed It has expandability and simplicity that can combine front-wheel drive, rear-wheel drive, and four-wheel drive with one motor by mounting one or two matching gear parts 132 and differential gear parts 136 .

In addition, accessories such as wheels 113 and 114, suspensions, steering devices, bumpers, doors, fenders, seats, lights, and lighting mounted on the chassis 10, which are frames for automobile structures, are important elements constituting the chassis and body. As a result, another embodiment regarding a manufacturing or assembly method that can actually be used industrially is required, but this is outside the scope of the present invention and bolts to the bead part 105 for reinforcement of the flat chassis 10 and the rim beam 106 in the shape of a WF beam. , is omitted because it can be easily installed by fastening rivets or welding.

Example 4. Battery Cooling System Solution

Embodiment 4 relates to a battery cooling system of the present invention, and FIG. 14 is a schematic diagram of a battery cooling system, and FIG. 15 is an air cooling type, a water cooling type, and a shape for each phase change cooling method.

The battery cell 120 of an electric vehicle is the most expensive part among vehicle parts, and the battery performance is directly related to the lifespan of the vehicle. Natural cooling, passive cooling, active cooling, or additional cooling method and thermal control management system are usually required to prevent thermal runaway from occurring and leading to explosion and combustion accidents.

Currently, lithium ion batteries for electric vehicles have high energy density and voltage per cell more than three times higher than that of nickel-based batteries. In order to secure safety, a protection circuit is provided to prevent overcharging, overvoltage, and overcurrent, while, in the case of automobiles where safety is emphasized, mechanical supplementary measures and efficient cooling solutions are absolutely necessary.

Battery temperature is one of the most important factors influencing performance and lifetime Effective, simple and low-cost cooling solutions are essential for electric vehicles because they need to control what is happening.

The general heat transfer process is a path function representing the movement of heat, and Fourier's law is applied to conduction, which is a heat transfer process inside a solid (free electrons, lattice vibration, etc.), and Newton's Law, which is a heat transfer process, applies Newton's Law, and Stefan-Boltzmann's law applies to radiation, a heat transfer process by light or electromagnetic waves.

Conduction, which is a heat transfer process inside a solid, and convection, which is a combined effect of fluid flow, is the core 102 of the present invention, the concentric tube 100, the auxiliary filled tube 101, and both sides of the outer layer (face). )(103) is the main path function related to the material and shape of the plate, and the related Fourier heat conduction law is as follows.

As given in the above law, in the present invention, the heat conduction area (A) of the battery cell 120 is evenly distributed over the entire surface of the chassis 10, and the individual battery module 121 is a fine tube ( By being individually housed in 100), it is possible to use the fine tube 100 as the core, the auxiliary filling tube 101, and the face 103 on both sides as a heat sink, so that the battery can be installed in a narrow place. It can be seen that it is clearly differentiated from the conventional pouch-type battery pack or aggregate-type battery pack construction method of densely populated electric vehicles.

In addition, in order to increase the amount of heat (Qcd) moved by conduction, the auxiliary filling tube 101 is inserted in the space between the triangular empty space 145 between the concentric tube 100 and the concentric tube and the outer layer 103 on both sides to accommodate the battery. Thus, it adopts a method to further expand the area of heat conduction and heat convection, and the material of the thin tube 100 with an outer diameter of 25 mm and the auxiliary filling tube 101 housing the battery is an aluminum alloy (k = 237W) with a high thermal conductivity coefficient (k). /m·k) is more preferable.

Looking at the area of the heat sink 144 as a cross-sectional standard, the circumference of the triangular empty space between the concentric tube 100 and the concentric tube is P = αR1 + βR2 + γR3, and since the value is π, the 25 mm fine tube of the present invention ( 100) has a heat dissipation area of 39.26 (12.5π) mm, a circumference (2πR) of the auxiliary filling tube 101 is 12.12 (2π * 1.93) mm, and a heat dissipation area on both sides is 24.25 mm, for a total of 63.52 By extending to mm, the heat dissipation area of about 1.62π (5.08) times the radius (R: 12.5mm) of the fine tube 100 is secured, and if necessary, the heat dissipation area ( A) can be further enlarged.

In addition, as a ventilation measure to increase the conduction heat transfer rate (Qcd), a triangular empty space between the fine tube 100 by providing a “heat exchange passage” between the outside of the concentrator tube 100, which is the battery storage space, the auxiliary filling tube 101, and the external atmosphere. 'Natural convection heat exchange' using natural ventilation using the difference in temperature (△Tinner) and external ambient temperature (△Touter) and air flow following vehicle driving, and forced ventilation where heat exchange occurs by inputting external power if necessary An air cooling type cooling system 147 of the method is adopted as a basic cooling method.

The air-cooled cooling system 147 includes a heat exchange tube having an air intake 141 and an air exhaust port 142 as a heat exchange channel (passage), and constitutes a heat exchange circuit with the auxiliary filling tube 101 as a cooling air oil pipe 140 . However, the impeller is installed in the tube and a tube axial fan 143 that blows gas in the axial direction is configured as an air cooling system in which the air intake 141 and the air exhaust port 142 are added. The cooling efficiency is increased by the forced ventilation method that receives the signal from the sensor and exhausts it with external energy.

The water-cooled cooling method or phase change material (PCM) cooling method that further improves the efficiency of the air-cooled cooling system 147 uses the auxiliary filling tube 101 as the cooling air oil tube 140, and is meticulous to accommodate the battery. A water cooling cooling system 148 that injects water as cooling water 145 into the triangular empty space between the tube 100 and the auxiliary filling tube 101 or a phase change material such as paraffin or ionic compound ( 146) is a hybrid cooling method of the phase change material cooling system 148 that further improves the effects of heat storage and heat dissipation.

The characteristic of this method is that water with high specific heat (1cal/g℃) or a phase change material such as paraffin (PCM) 146 as the cooling water 145 does not flow between the cooling channels, but air with a small heat capacity and low thermal conductivity. (0.31 kcal/Nm³ ℃) flows into the auxiliary filling pipe 101 to cool the air oil pipe 140, and the cooled air oil pipe heats the battery cell 120 and the cooling water 145 or the phase change material 146. It is a cooling method that absorbs and heat exchanges, and at this time, the waste heat of the heat-exchanged battery cell 120 is discharged to the outside atmosphere or recycled to the automobile air conditioning (Heating, Ventilation, Air Conditioning, HVAC) system to improve the cooling efficiency. .

In parallel with the basic air-cooled cooling system 147, the auxiliary filling pipe 101 is a cooling air oil pipe 14, and the triangular empty space between the auxiliary filling pipe 101 and the fine pipe 100 is filled with water or a phase change material 146. A hybrid cooling latent heat storage system that injects a It has the advantage of having an isothermal storage process that releases energy.

When the cooling system 14 of the present invention is summarized, the flat undercarriage 10 evenly distributes the battery cells 120 over the entire surface of the chassis to significantly lower the heat concentration than the conventional pouch-type battery or integrated battery pack in which the batteries are dense. , by individually accommodating the battery cells in the fine tube 100, the intermediate layer 102, the fine tube 100, the auxiliary filling tube 101, and the both sides outer layer (face) 103 together as a heat sink 144, the fine tube (100) A heat dissipation area of about 1.62πR (5.08) times or more compared to the radius (R) is secured, and the entire chassis area is used as a heat sink 144 to diffuse heat conduction and convection according to the heat of the battery.

In addition, based on the air-cooled cooling 147 of the external atmospheric flow, the water-cooled cooling 148 that injects the coolant 145 as a refrigerant and the phase change cooling 149 using a phase change material 146 using paraffin, etc. By providing a hybrid cooling method of three-way cooling that combines natural convection and forced air cooling, which is air cooling, water cooling, and phase change material cooling, it has improvements such as reducing thermal stress of expensive batteries, increasing discharge time, and extending cycle life.

Example 5. Flat undercarriage of out-of-chassis motor

A fifth aspect of the present invention relates to a motor unit that is a power source of a vehicle in a standard cross-sectional shape of the automobile chassis frame of Embodiment 1, and is placed outside the chassis without being stored in a double sinusoidal hollow tube, and in actual industrial use, This is an embodiment suitable for a large-diameter or large-diameter radial motor or an in-wheel motor in which the motor is located inside a wheel rather than a caliber serial motor.

In conventional radial motors, structurally, the rotor and stator are arranged parallel to the axis of rotation, and magnetic flux generated from permanent magnets or electromagnets links the coil unit in only one direction. Because it is relatively difficult to miniaturize and harden small diameters, radial motors generally have a large-diameter enclosure and a single-axis shape. When applied to an electric vehicle, the front wheel 113 or rear wheel 114 side wheel drive shaft 108), and for four-wheel drive, a two-motor method in which each motor is installed on the front and rear wheels is common. In the case of an in-wheel motor, four motors are placed on each of the four wheels.

In order to place the mass-produced traditional radial motor and the in-wheel motor that directly drives the wheels on the flat chassis 10 of the present invention, the motor must be mounted on the outside of the chassis 10 frame with the above characteristics, the external motor mounting method And a preferred embodiment of the mounting method of the additional battery module 121 is exemplified with reference to the cross-sectional view of the battery module of the chassis external motor flat chassis of FIG.

In order to place the radial motor, which is the power source of the vehicle, in the chassis exterior type, the radial motor mounting space must be secured in the bonnet and front bumper seating part 118 for front wheel drive, and the radial motor mounting space in the trunk and rear bumper seating part 119 for rear wheel drive. The motor secures a support point by inserting a hollow cone beam into the cylindrical cylinder at 8 places inside the reinforcement bead part of the steering/suspension device seating part 115 of the chassis frame, and is bolted to the bead nut part arranged in three rows on the upper and lower sides. The in-wheel motor can be installed relatively easily if it is fastened to support the motor and the steering and suspension devices, and is provided with the drive power line and the inlet and outlet parts of the cooling system.

However, the radial motor mounting place is the reinforcement bead part 105 on the wheel drive shaft 108 of the front wheel 113 and the rear wheel 114, the edge beam 106 of the chassis edge, and the dashboard seating part 116 and the seat. A power system (power train) fixing part having the tooth part 117 as a supporting point is provided, and the motor part 13, the wheel drive shaft 108, the differential gear part 136, the steering/suspension device, etc. are placed, thereby installing the powertrain. It is preferable to disperse the stress concentration and local stress generated by the sintering over the entire surface of the chassis 10 and prevent the fastening device such as pins or bolts from penetrating the fine tube 100 .

At this time, the battery module 121 storage space is added by inserting the fine tube 100 and the auxiliary filling tube 101 into the double sinusoidal wave hollow tube 104 for storing the serial motor 130 of the first and third embodiments. It is preferable to further increase the capacity of the battery unit 12 by securing the It is possible to add a bundled battery module (121A) capable of accommodating the hair rate (121).

If the capacity of the battery module 121 is calculated based on the example of Example 2, 798 (19 modules * 42 cells) standard cylindrical battery cells 120 are accommodated and a maximum of 13.286 kWh (798 pieces * 3.7V *) 4.5Ah), an incremental mileage of 66km at 5km driving and 106km at 8km driving per 1kWh can be secured. Since the power supply is composed of unit cells and has a maximum capacity of 115.784 kWh (6,954 * 3.7V * 4.5Ah), it is possible to secure a combined mileage of about 578 km when driving 5 km per 1 kWh and about 926 km when driving 8 km.

On the other hand, removing the double sinusoidal hollow tube 104 of the flat undercarriage 10 and arranging the fine tube 100 at the position of the cylindrical intermediate layer 102A and the reinforcing bead portion on the central axis of the chassis 10 ( 105) is added and the flat undercarriage 10A of the out-of-chassis motor forming the both-side outer layers 103 has the same external shape as the standard flat undercarriage 10 of Example 1, and includes a battery module 121 that can be accommodated and The number of standard cylindrical battery cells 120 is the same as the bundled battery module 121A in which 3, 4, 5, 4, and 3 of the fine tubes are focused in a hexagonal lattice inside the double sinusoidal hollow tube 104. , it can be implemented relatively easily by applying the example of Embodiment 1 mutatis mutandis.

Example 6. Flat chassis to which a wireless power transmission current collector is added

In the sixth aspect of the present invention, a current collector for wireless power transmission is added to the floor pan of the chassis 10 in the standard cross-sectional shape of the automobile chassis frame of Example 1 to provide roads, service areas, garages, and parking Regarding the wireless power transmission system 15 for wirelessly charging the battery cell 120 in a space, etc. It is illustrated with reference to the placement position and cross-sectional view of

In general, the spread of electric vehicles is a low total cost of ownership (TCO) and simple and convenient charging is an important criterion for consumers' purchasing decisions. To reduce the time and hassle of charging, wireless power transmission ( 'Wireless charging' is required to charge the battery by wireless power transfer), and it is installed on the lower side of the electric vehicle and the primary side of the power supply line or the ground charging pad 151 buried in roads, service areas, garages, and parking spaces. Electric energy is converted into electromagnetic energy through a car pad 150 , which is a current collecting device of the secondary-side current collecting coil 153 , to drive a motor of the vehicle or to charge the battery cell 120 .

Wireless power transmission is a transmission technology that converts electrical energy into a form capable of wireless transmission, such as magnetic fields or electromagnetic waves, and delivers it to the load. It is a charging system, and practical short-distance wireless power transmission is divided into a magnetic induction method for ultra-short distance and a magnetic resonance method for short-range according to the energy transfer method and transmission distance.

Magnetic induction method is a method that is used in most of the wireless chargers that are currently commercialized due to many technological standardization, but it can be used only for an ultra-short distance of less than 10cm, so there is a difficulty in expanding the electric vehicle market due to limitations in application, and magnetic resonance (magnetic resonance) The resonance method has the advantage of being able to charge over a short distance (1m to several meters), simultaneous charging of multiple devices, and improved charging freedom. It is becoming a condition for popularization of transmission.

The spatial development prospect of wireless power transmission technology in the vehicle sector is evolving into three stages: static charging, in which charging is performed while parked, and semi-dynamic charging, which can be charged when stopped in a specific section such as waiting for a signal at an intersection. -dynamic charging), it can be classified as a dynamic charging method that allows charging while driving with a built-in charging facility on the road, and the simple and convenient Wireless Electric Vehicle Charging (WEVC) technology provides high power transmission efficiency It is expected that the wireless charging system will eventually become the standard charging method for electric vehicles.

In order to provide the wireless charging service, the present invention provides a vertical double sinusoidal hollow tube 104 and a rim beam 106A and a rim beam 106B in the horizontal direction of a flat undercarriage 10, a lower floor plate, and a wheel A secondary-side current collector coil 153 as a vehicle current collector in a concave-convex position and space formed by the reinforcing bead portion 105 of the driving shaft 108, the dashboard seating portion 116, and the seat seating portion 117 ) with a built-in Car Pad 150, the secondary-side power supply comprising the charging circuit unit 127 of the second embodiment, the main distribution switching system (MDSS) 125 and the battery management system 129, etc. Wireless power forming the electromagnetic circuit with the ground-based charging pad 151 composed of the primary-side power supply coil 152 and the control system of roads, service areas, garages, and parking spaces by composing the system A transmission system (15) is provided.

At this time, the thickness of the car pad 150 is set to 37.8494 mm or less, which is the protrusion height of the bow shape of the bi-sine wave hollow tube 104 and the reinforcing bead part 106, so that the height from the lowest part of the vehicle to the ground plane is the lowest ground clearance. It is desirable to prevent an increase in air drag on the lower surface of the vehicle and scratch the ground caused by protrusion without encroaching on the (ground clearance), and the circular secondary side current collector coil 153 built into the car pad 150 makes the circle most dense. A hexagonal grid arrangement that occupies 90.7% of the flat area (rectangular-78.5%) with a regular hexagonal arrangement to maximize space and material saving and current collection efficiency is preferable, 105) is fastened with a plurality of bolts to the bead nut portion 105b arranged in three rows, the cable is accommodated in the cylindrical cylinder 105a, and the outer space 106x of the rim beam 106 circumferring the outside of the chassis 10 ) and connect it to the charging circuit unit 127 and the main distribution and exchange system (MDSS) 125 so that the wiring cable is not exposed to the outside of the chassis 10 .

A plurality of car pads 150 mounted on the floor pan of the flat undercarriage 10 are added to the concave-convex space between the double sinusoidal wave hollow tube 104 and the reinforcing bead part 105. Therefore, it can be appropriately adjusted according to the standardization of the wireless charging system 15 and market conditions, and the number of car pads 150 can be adjusted as necessary or the car pad 150 can be installed relatively easily as a post-service after the vehicle is shipped. It has the characteristic of being able to easily adapt to the evolution of road infrastructure such as smart roads because it can secure the redundancy that can be achieved.

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10: flat chassis (扁平型車臺) / chassis
100: concise tube 101: auxiliary filling tube
102: middle layer (core) 103: both sides outer layer (face)
104: positive sine wave hollow tube 105: bead portion for reinforcement
106: edge beam (A/B) 107: neutral axis of chassis material
108: wheel drive shaft 109: channel beam
11: body support 110: wheel shaft rotation origin (O)
111: center side battery storage space 112: side side battery storage space
113: front wheel 114: rear wheel
115: steering / suspension mounting portion 116: dashboard seating portion
117: seat seating portion 118: bonnet and front bumper seating portion
119: trunk and rear bumper seating part 12: battery part
120: standard cylindrical battery cell 121: battery module
122: battery socket 123: battery outlet
124: module outlet 125: main distribution switching system (MDSS)
126: electric device 127: charging circuit unit
128: battery module stopper 129: battery management system
13: motor unit 130: serial motor
131: drive gear outlet 132: matching gear unit
133: double helical gear (double helical gear)
134: Aux. shaft 135: drive pinion (drive pinion, D)
136: differential gear unit 137: motor unit drive shaft
138: uneven (凹凸) groove 139: impact insulation pad
14: cooling system 140: cooling air oil pipe
141: air intake 142: air exhaust
143: axial blower 144: heat sink
145: cooling water (water) 146: phase change material
147: air-cooled cooling system 148: water-cooled cooling system
149: phase change cooling system 15: wireless power transmission system
150: car pad (Car Pad) 151: ground charging pad
152: primary side feeding coil 153: secondary side feeding coil
166: edge beam web 167: bolt
168: welding 169: socket lead wire

Claims (16)

In the chassis part, which is a structural frame that is a chassis as the basic structure of a car,
a frame constituting the chassis;
a hollow hollow tube vertically penetrating the chassis and accommodating the motor; and
A plurality of transverse reinforcement bead portion (bead);
It consists of
The frame is a hollow tube (tube) horizontally, three or more multi-stage, and a hexagonal lattice-shaped member condensed in the form of an intermediate layer (core),
On both sides of the intermediate layer, two thin plates made of a high-strength material to form an outer layer (face) on both sides,
The middle layer (core) of the fine tube functions as a filler (filler) supporting the plate material, which is the outer layer (face),
stabilizing the outer layer against winkling or buckling;
An auxiliary filling tube of an ultrafine tube is inserted into the empty space between the hollow microtubule, which is the middle layer, and between the capillary tube and the outer layers of both sides, to more closely fill the empty space,
An integrated flat chassis, characterized in that it is formed in a three-layer structure of the intermediate layer composed of the outer layer on both sides of the plate, the fine tube and the auxiliary filling tube.
According to claim 1,
The hollow hollow tube housing the motor part has corrugations in the longitudinal direction, and the corrugation waveform converts the trough of the sinusoid into a positive region so that the corrugation period has π radians, and each ridge of the waveform ( peak) is located on the outer wall of the hollow tube, and each trough of the waveform is a positive sinusoidal hollow tube that forms the inner wall of the hollow tube,
It has 36 corrugations of a convex shape in the outer radial direction in the circumferential direction, and is placed in the longitudinal direction on the central axis of the central part of the frame so that the ridges and valleys of the corrugations are directed in the longitudinal direction of the frame,
The reinforcing bead portion has a bow-shaped cross section, and a plurality of the concentric tubes are added to the upper and lower surfaces of the concentric tubes in the transverse direction of the frame so as to be perpendicular to the concentric tubes to form an intermediate layer with the concentric tubes,
But adding a rim beam to the edge of the frame,
The edge beam is a structural member of the cross-sectional shape of the WF beam, which is joined to the outer layers of both sides of the frame to support an external force or load in the axial direction, and to increase shear stress such as tension, torsion, bending, and compression,
The plate material as the outer layer is molded to be assembled according to the shape of the reinforcing bead part of the intermediate layer, and a sandwich panel-shaped structure formed by bonding the plate material as the outer layer to the intermediate layer is formed.扁平型車臺, platform chassis. 3. The method of claim 2,
In the plurality of fine tubes forming the middle layer of the frame, a cylindrical battery is stored in series to form an energy unit for driving a motor and an electric device,
The double sinusoidal hollow tube on the central axis of the frame in the longitudinal direction has a diameter of at least twice the thickness of the core of the fine tube, and stores a series motor, which is a vehicle driving source, inside the hollow tube,
The space between the fine tubes fills the auxiliary filler tube as an air flow passage (channel),
By using the auxiliary filling tube as a cooling air conduit for discharging heat to the outside atmosphere to form a cooling system of heat exchange with the heat sink function of the outer layer, the motor unit as a driving source stored in the bi-sine wave hollow tube, and the fineness An integrated flat undercarriage, characterized in that the battery unit, which is an energy source stored in the tube, the fine tube, the auxiliary filling tube, and the frame having the both-side outer layers as heat sinks are integrated into one chassis. chassis).
3. The method of claim 2,
The reinforcing bead portion having the bow-shaped cross section orthogonal to the concentric tube as an intermediate layer has a function of reinforcing the core and distributing external force to the fine tube, and a pin or bolt when mounting a vehicle accessory to the chassis. has a function as an installation place of
A plurality of bead nut portions are provided in four cylindrical cylinders and three rows in the cross-sectional direction inside the reinforcing bead portion, and a hollow cylinder beam is inserted into the cylindrical cylinder to secure a support point, and the reinforcing bead portion By joining the vehicle body (body) and the accessories by fastening them with bolts and nuts, the pin or bolt fastening device does not penetrate the fine tube, and the stress concentration and local stress generated in the hole or notch, etc. Integrated flat chassis (扁平型車臺), characterized in that it is dispersed over the entire surface of the frame via the both-side outer layer and the reinforcement bead portion.
3. The method of claim 2,
The border of the frame edge,
Inserting the outer layers on both sides of the frame into one inner side of both sides of the edge beam,
Joining the edges of the flange of the edge beam and the boundary surface of the frame by overlapping joints or fillet welding,
On the other side of the outer side of the rim beam, the steering and suspension mounting part on the wheel drive shaft, the fender part and the body support part, the bonnet and the front bumper seating part, the trunk and the rear bumper seating part, etc. are rivets, bolts, welding methods. connected to the body,
The empty space between the upper and lower flanges and the web on the outside of the edge beam accommodates the duct of the harness cable and the battery wiring cable, and the duct of the battery and motor cooling pipe, and is empty by adding a U-shaped channel beam. by isolating the space from the outside,
An integrated flat chassis, characterized in that the flange and the web of the edge beam, and the flange and the web of the channel beam are combined to form an assembly beam of a box beam.
4. The method of claim 3,
The battery mounted in the fine tube is stored in series in a battery socket having a lead wire of a negative (-) electrode, is accommodated in the fine tube, and together with a positive (+) electrode terminal at the end, a battery module for housing the fine tube. form,
The battery module is characterized in that the battery outlet connected to the power circuit and the positive (+) terminal and the negative (-) terminal are fastened in an uneven type, and are connected to the power supply in a star method with the power management system, characterized in that integrated flat chassis.
7. The method of claim 6,
The battery module is connected to a Main Distribution & Switching System (MDSS),
The main distribution switching system (MDSS) is a power semiconductor device having N input and M output lines connected by switches, and having a bidirectional power conversion function of a matrix converter circuit function that is N×M switch elements ( Power Semiconductor Devices, PSD), but
By dividing the charging and discharging, circuit breaking, sensor signal detection, battery discharging and charging sequence designation, and designating the battery module for regenerative braking by module and allocating the sequence, the number of times of charging and discharging of the battery cells is reduced to extend the lifespan, and the charging time required An integrated flat chassis, characterized in that it shortens the time.
3. The method of claim 2,
The serial motor, which is a power source stored in the double sinusoidal hollow tube, has a concave groove having a diameter of 10 mm circumscribed on the circumferential surface of the motor housing and a concave groove formed by ridges and valleys of the inner wall of the double sinusoidal hollow tube. 36 concave types It has a recessed groove and is used as a space to accommodate cooling pipes, coil wiring, and shock insulation pads.
6 water cooling system piping pipes, 6 air cooling system air oil pipes, 12 motor coil guide parts, and 12 shock insulating pads are accommodated. With a thickness of √2 times (1.4142) of the receiving groove diameter of 10 mm, the elastic compression capacity is secured, pulled in the longitudinal direction, inserted into the concave-convex groove, and then loosened again to restore elasticity by fixing the motor to reduce stress concentration. An integrated flat undercarriage, characterized in that the motor unit is contained without causing bolts or wedges, and the rotational vibration of the motor and the rolling vibration of the wheel are isolated from each other, thereby reducing the fatigue of the motor and the frame structure.型車臺, platform chassis).
9. The method of claim 8,
The serial motor, which is a power source stored in the positive sinusoidal hollow tube, is a front wheel by perforating the outer layer of the frame and the positive sinusoidal hollow tube at a location where the motor rotation shaft intersects the wheel shaft in a direction orthogonal to the wheel shaft. , equipped on the rear wheels and front and rear wheels, combining front, rear or four-wheel drive with one serial motor,
The drive shaft of the series motor is equipped with a double helical gear that removes the axial load by combining a pair of helical gears with opposite torsional angle directions to form the drive gear part of the power system (power train). , between the drive gear unit and the differential gear unit of the series motor, a matching gear composed of a double helical gear and an auxiliary rotation shaft (Aux. shaft) is placed to separate the series motor from the wheel unit, An integrated flat chassis, characterized in that the origin (O) is raised, the deceleration effect of a certain ratio, and the load impedance (Z) are matched.
4. The method of claim 3,
In order to maximize conduction and convection, which are the heat transfer processes of the battery, the battery is dispersedly accommodated in the entire tubule to increase the heat dissipation area, and the space between the tubules and the space between the tubules and the outer layer is filled with the auxiliary By filling the tube and expanding the heat conduction and convection area of the battery, the heat dissipation area is expanded 1.62π (5.08) times the radius of the fine tube (R), and the outer layers on both sides in contact with the external atmosphere are used as a heat sink,
The space between the fine tube and the auxiliary filling tube is connected with an air oil pipe (tube) having an intake port and an exhaust port, and an axial flow blower that blows gas in the axial direction of the oil pipe is added, and when the temperature rises, it is driven with external energy An integrated flat chassis characterized by an air-cooling cooling method of a battery cooling system that exchanges heat with the outside atmosphere.
11. The method of claim 10,
In addition to the air-cooled cooling method of the battery cooling system, a water-cooled cooling method in which water is injected as a coolant into the empty space between the fine tube accommodating the battery and the auxiliary filling tube, the heat exchange effect between heat storage and heat radiation is further improved In order to improve it, the method further includes a phase change material cooling method that injects paraffin or an ionic compound, but is based on an air cooling method, a combination of an air cooling method and a water cooling method, or an air cooling method and a phase change material cooling method An integrated flat chassis, characterized in that the cooling efficiency is improved by discharging the battery waste heat to the outside atmosphere or recycling it to the automobile air conditioning system with a hybrid cooling method.
7. The method of claim 6,
Without storing the series motor, which is a vehicle driving source, inside the double sinusoidal hollow tube on the central axis in the vertical axis direction,
Three, four, five, four, and three of the concentric tubes 100 are stacked in the horizontal direction, and a plurality of auxiliary filling tubes are concentrated in a hexagonal grid shape to add 19 battery modules to the concentric The battery unit, which is an energy source stored in the tube, the fine tube, the auxiliary filling tube, and the frame having the both-side outer layers as heat sinks are integrated into one chassis, and the motor unit as the power source is installed as an external chassis type. Integrated flat chassis.
3. The method of claim 2,
The position and the concave-convex space formed by the vertical double sinusoidal hollow tube formed in the floor pan of the flat undercarriage, the reinforcing bead part and the edge beam in the horizontal direction An integrated flat chassis, characterized in that it provides an installation space for a receiving pad or CarPad, which is a wireless charging and current collector for a vehicle that charges the battery unit, which is an energy source, with electromagnetic waves.
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